JP7680192B2 - air conditioner - Google Patents

Description

The present invention relates to an air conditioning device and an air-conditioned chair.

Technology has been disclosed that uses well water in air conditioning systems (e.g., Patent Documents 1-2).

JP 2016-80252 A Patent No. 6444747

When the heat of well water is used to adjust the temperature of the air supplied from an air conditioner to the space to be air-conditioned, the amount of heat produced for temperature adjustment is reduced, thereby realizing energy savings. However, the temperature of well water is likely to be higher than the temperature of cold water generated by a refrigerator or the like. This means that the temperature of the air supplied from the air conditioner may be high. As a result, it may be difficult for an air conditioner that uses well water to adequately cool the space to be air-conditioned.

Therefore, the objective of this application is to provide technology that can effectively use well water to optimally cool the space to be air-conditioned.

To solve the above problems, the present invention opts to place an air conditioner that uses well water in a space where other air conditioners are placed, or to place an air conditioner that uses well water in a location close to the user.

In detail, an air conditioner according to one aspect of the present invention is an air conditioner that can be used in an air conditioning system that uses well water to adjust the temperature of a space to be air-conditioned, and is equipped with a heat medium path through which a heat medium passes, which is supplied from a heat exchanger that exchanges heat with the well water, a radiation panel for an interior surface that is capable of transferring heat from a portion of the heat medium path and that radiates the cold heat of the heat medium from a portion of the interior surface that forms the space to be air-conditioned where the air temperature is adjusted by the air conditioning system, and a valve that can adjust the flow rate of the heat medium passing through the radiation panel.

With this configuration, cold heat can be radiated from the radiation panel to the space to be air-conditioned. In addition, the space in which this configuration is placed is cooled by other air-conditioning devices included in the air-conditioning system. Therefore, even if the temperature of the well water is high and the amount of radiant heat transferred from the radiation panel to the space to be air-conditioned is small, the space to be air-conditioned is cooled appropriately.

In addition, with this configuration, the flow rate of the heat medium can be adjusted according to the installation location of the configuration by controlling the opening of the valve. This reduces the flow rate of the heat medium. This reduces the use of well water for heat exchange with the heat medium. It also reduces the power of the pump that pressurizes the heat medium. Therefore, even if multiple air conditioning devices are installed, it is possible to effectively use well water and achieve energy savings.

In the air conditioning device relating to the above-mentioned aspect, the air conditioning device may have a plurality of radiant panels, the size of the radiant panels being equal to or smaller than a predetermined value, the plurality of radiant panels may be grouped into a set, and the valve may be controlled to adjust the flow rate of the heat medium flowing through each of the heat medium paths capable of transferring heat to the set of radiant panels.

In this configuration, the size of the radiation panel is set to a predetermined value or less, and multiple radiation panels are grouped together, thereby limiting the area in which heat radiation is performed. Furthermore, with this configuration, the flow rate of the heat medium flowing through the heat medium path is adjusted for each group. Therefore, the flow rate of the heat medium can be adjusted individually for each area in which the configuration is installed. In other words, the flow rate of the heat medium is reduced. Therefore, the flow rate of the well water that exchanges heat with the heat medium is also reduced. Furthermore, with this configuration, the power of the pump that pressurizes the heat medium can be reduced. Therefore, this configuration can effectively use well water to achieve energy savings.

In addition, with this configuration, the size of the radiant panel is equal to or smaller than a predetermined value, so it can be easily placed on the ceiling. This reduces installation costs. Furthermore, if other air conditioners included in the air conditioning system are installed near this configuration, the piping through which the heat medium supplied to the other air conditioners flows can be shared with the piping through which the heat medium supplied to this configuration flows. This also reduces the installation costs of this configuration.

In the air conditioning device according to the above aspect, the valve may be controlled so that the heat medium always passes through the heat medium path of the air conditioning device arranged in the perimeter zone of the space to be air-conditioned, and the valve may be controlled so that the flow rate of the heat medium passing through the heat medium path of the air conditioning device arranged in the interior zone of the space to be air-conditioned changes depending on the temperature of the interior zone.

According to this configuration, the flow rate of the heat medium is reduced in the interior zone. Therefore, the flow rate of the well water that exchanges heat with the heat medium is reduced. In addition, the power of the pump that pressurizes the heat medium can be reduced. Therefore, energy savings can be achieved by effectively using the well water. Furthermore, according to this configuration, fluctuations in room temperature can be suppressed in the perimeter zone where the air conditioning load is high. Therefore, this configuration is a highly convenient device that can make the temperature of the air conditioned space uniform even if there are areas with different air conditioning loads in the air conditioned space.

An air conditioner according to one aspect of the present invention is an air conditioner that can be used in an air conditioning system that uses well water to regulate the temperature of a space to be air-conditioned, and is equipped with a heat medium path through which water is pumped from a heat exchanger that exchanges heat with the well water and through which a heat medium that has absorbed the heat of the air in the air conditioning system passes, and the heat medium path is located at a location at or above a predetermined height in an open-ceiling area within a building and at a location where radiant heat of a predetermined value or more can be transmitted to a user.

Here, the predetermined value includes a value at which the user can feel the cooling effect.

According to this configuration, the heat medium path is placed at a location above a predetermined height in the open-ceiling area, where it is difficult to adjust the thermal environment. Then, of the radiant heat radiated from the heat medium path, a heat quantity above a predetermined value is transferred to the user. Therefore, the thermal environment can be adjusted even in such a location. Furthermore, even if the temperature of the well water is high and the temperature of the heat medium passing through the heat medium path is high, the user can feel the cooling effect.

In addition, with this configuration, if other specified air conditioning devices are installed in the building, the user can feel the cooling effect even with the cold air generated by heat exchange with the heat medium used to generate cold air in the other specified air conditioning devices in the location where the configuration is installed. Therefore, this configuration can effectively use well water and achieve energy savings even when multiple air conditioning devices are installed.

In the air conditioning device according to the above aspect, the heat medium path may have a first heat medium path through which a first heat medium having a temperature below a predetermined temperature passes, and a second heat medium path through which a second heat medium having a temperature equal to or higher than the predetermined temperature passes, and may further include a valve capable of adjusting the flow rate of the first heat medium passing through the first heat medium path and the flow rate of the second heat medium passing through the second heat medium path.

According to this configuration, the flow rate of the heat medium flowing through the heat medium path is adjusted. Therefore, the heat medium flow rate is reduced. Therefore, the use of well water for heat exchange with the heat medium is reduced. In addition, the power of the pump that pressurizes the heat medium can be reduced. Therefore, even when multiple air conditioning devices are installed, it is possible to effectively use well water and achieve energy savings. Furthermore, by reducing the use of well water, it becomes possible to easily respond to situations in which the amount of well water that can be pumped from the well is limited.

In addition, with this configuration, the heat medium passing through the heat medium path can be switched between the first heat medium and the second heat medium. Therefore, it is possible to adjust whether cold heat or hot heat is radiated from the heat medium path. Such an air conditioner is a highly convenient device.

In the air conditioning device according to the above aspect, the heat medium may be a fan coil unit included in the air conditioning system, the fan coil unit being attached to the underside of the desk top, and may include a heat medium that has exchanged heat with air passing near the outer surface of the coil in the coil.

According to this configuration, the heat medium used to generate cold air in the coil of a fan coil unit that is retrofitted to the underside of the desk top inside the building is reused to generate cold air. With this configuration, even if multiple air conditioning devices are installed, well water can be effectively used to achieve energy savings.

In addition, a chair according to one aspect of the present invention is an air-conditioned chair that can be used in an air-conditioning system that uses well water to regulate the temperature of a space to be air-conditioned, and includes a heat medium path through which a heat medium passes, the heat medium being sent from a heat exchanger that exchanges heat with the well water, and a transfer means that absorbs cold heat from the heat medium passing through the heat medium path and transfers the absorbed cold heat to the seat of the air-conditioned chair.

According to this configuration, the cold heat absorbed from the heat medium flowing through the heat medium path can be transferred to the user via the seat. Therefore, the cold heat can be transferred from close range to the seated user, improving the efficiency of cold heat transfer. This allows the user to be cooled as desired. Furthermore, the user can feel the cooling effect even when the temperature of the well water is high.

In addition, since the cold heat can be transferred to the user from a close distance, the amount of cold heat transferred to the user can be reduced. This makes it possible to reduce the flow rate of the heat medium. This also reduces the use of well water for heat exchange with the heat medium. In addition, it also reduces the power of the pump that pressurizes the heat medium. This makes it possible to effectively use well water and achieve energy savings. Furthermore, by reducing the use of well water, it becomes possible to easily respond to situations in which the amount of well water that can be pumped from a well is limited.

In the chair according to the above aspect, the seat may have an opening, and the transmission means may have a hollow portion having a ventilated space connected to the opening, and a fan that supplies air that has absorbed cold heat from the heat medium passing through the heat medium path toward the hollow space.

According to this configuration, cool air is supplied to the clothes of the user sitting on the seat, and the cool air is prevented from directly hitting the skin of the user, thereby preventing the user from feeling uncomfortable.

In the chair according to the above aspect, the transmission means may have a member on the back side of the seat that can transmit heat from the heat medium path.

With this configuration, cold heat is transferred from the member to the clothes of the user sitting on the seat. This prevents the cold air from directly hitting the user's skin. This prevents the user from feeling uncomfortable.

The present invention provides technology that can effectively use well water to optimally cool the space to be air-conditioned.

FIG. 1 shows an example of an outline of the configuration of an air conditioning system according to an embodiment. FIG. 2 illustrates a schematic diagram of an example of an overview of a DCFCU. FIG. 3 shows an example of a variation in the shape of holes provided in the face panel. FIG. 4 shows an example of a desk schematic with a retrofitted DCFCU. FIG. 5 shows a DCFCU according to a modified example. FIG. 6 shows an example of the outline of a DCFCU according to another modified example. FIG. 7 illustrates an outline of a counter air conditioner. FIG. 8 shows an example of the outline of an outside air processing machine. FIG. 9 shows an example of a schematic of a duct unit. FIG. 10 is an example of a cross-sectional view of a branch portion where an anemometer is disposed. FIG. 11 shows a schematic diagram of an air-conditioning sofa. FIG. 12 is an example of a detailed view of an air-conditioning sofa. FIG. 13 illustrates an outline of a modified example of the air-conditioning sofa. FIG. 14 shows an example of an outline of a ceiling panel unit. FIG. 15 illustrates an overview of a floor panel unit. FIG. 16 illustrates an outline of a water source heat pump unit. FIG. 17 illustrates an overview of the Cool Spot device. FIG. 18 shows an example of an arrangement of the air supply means. FIG. 19 shows another example of the layout of the air supply means. FIG. 20 shows an example of a flowchart of the operation of the DCFCU. FIG. 21 shows an example of the supply air flow overview when the DCFCU is operating.

The following describes an embodiment of the present invention. The embodiment described below is an example of an embodiment of the present invention, and does not limit the technical scope of the present invention to the following aspects.

(System Overview)
FIG. 1 shows an example of the outline of the configuration of an air conditioning system 1 according to this embodiment. In the following description, the air conditioning system 1 supplies cold air to, for example, a plurality of air-conditioning target spaces. The air conditioning system 1 includes a plurality of air supply means for supplying cold air to the air-conditioning target spaces. As shown in FIG. 1, the air conditioning system 1 includes a well water pump 2 for pumping up well water from a well. The pumped up well water is used as a heat medium for heat exchange with water used to generate cold air in each air supply means. In the following description, such well water is referred to as direct system well water.

As shown in FIG. 1, the air conditioning system 1 also includes a water tank 9 that stores well water pumped up by the well water pump 2 for a predetermined period of time (e.g., overnight). The well water stored in the water tank 9 is also used for heat exchange with the water used to generate cool air in each air supply means. In the following explanation, this type of well water is referred to as indirect system well water.

The air conditioning system 1 includes an outside air processor 60, a direct current fan coil unit (hereinafter referred to as DCFCU) 20, a desk 30, an air-conditioned sofa 90, and a counter air conditioner 10 as an example of multiple air supply means that use well water from a direct system (see the upper right part of Figure 1).

The outside air processing unit 60 draws in outside air and processes it with latent heat. It then supplies the cooled outside air that has been subjected to latent heat processing to the space to be air-conditioned.

The DCFCU20 is installed in the ceiling of the space to be air-conditioned. It supplies cool air to the space to be air-conditioned. The desk 30 is placed in the space to be air-conditioned. A DCFCU20A of the same type as the DCFCU20 is later attached to the desk.

In the air-conditioned sofa 90, cold air is blown out from the seat or radiated from the seat. In the countertop air conditioner 10, cold air is radiated from the outer surface of the piping.

The air conditioning system 1 also includes an air supply means that uses well water in an indirect system. That is, the air conditioning system 1 includes a ceiling panel unit 40, a DCFCU 20B, a floor panel unit 45, a water-source heat pump unit 50, and a cool spot device 55 as examples of multiple air supply means that use well water in an indirect system (see the lower right of Figure 1).

The ceiling panel unit 40 is installed above the ceiling in the space to be air-conditioned. Cold heat is radiated from the ceiling panel unit 40 toward the space to be air-conditioned.

In addition, DCFCU20B is the same type of unit as DCFCU20. However, DCFCU20B is placed near the ceiling panel unit 40.

The water-source heat pump unit 50 is placed in a room (such as a conference room) near where the ceiling panel unit 40 is placed. The water-source heat pump unit 50 draws in air from the room, cools the air, and then circulates the air through the room. The floor panel unit 45 is placed under the floor of the space to be air-conditioned. The floor panel unit 45 radiates cold heat toward the floor.

The cool spot device 55 is installed, for example, in a hallway from the entrance of a building to a room inside the building. Cool air is supplied to the cool spot device 55 from the water heat source heat pump unit 50. The cool spot device 55 then blows the supplied cool air toward the hallway.

The configuration of each air supply means will be illustrated in detail below.
(Configuration of each air supply means using well water of direct system)
<DCFCU20>
FIG. 2 is a schematic diagram illustrating an example of the outline of the DCFCU 20. FIG. 2(A) shows an example of a longitudinal cross-section as an example of the outline of the DCFCU 20. FIG. 2(B) shows an example of a lateral cross-section as an example of the outline of the DCFCU 20. As shown in FIG. 2, the DCFCU 20 includes a fan 201 that draws in and blows out air. Here, the fan 201 is a DC fan whose blades are driven by a DC current. The fan 201 also blows out air in a lateral direction relative to the direction toward the space to be air-conditioned. The fan 201
are provided side by side in the longitudinal direction.

The DCFCU 20 also includes a coil 203 on the side of the fan 201 that faces the space to be conditioned, with a specified space between the coil 203 and the fan 201. As shown in FIG. 2(A), cold water that has exchanged heat with well water passes through the inside of the coil 203. The DCFCU 20 also includes an electric valve 215. The flow rate of cold water flowing into the coil 203 is adjusted by controlling the opening of the electric valve 215.

The coil 203 exchanges heat with the air blown out from the fan 201, removing the sensible heat contained in the blown air. In other words, the coil 203 is a dry coil. Therefore, the DCFCU 20 does not need to have a drain plate. Also, a certain space between the fan 201 and the coil 203 is defined as the upper chamber 209.

The DCFCU 20 also includes a baffle plate 202 in the upper chamber 209. The baffle plate 202 is installed at the outlet of each fan 201 so that its plate surface faces the fan 201. In other words, the air blown out from the fan 201 is rectified by the baffle plate 202 and directed toward the coil 203.

The DCFCU 20 also includes a face panel 204 with a specified space on the side of the coil 203 that faces the space to be conditioned. The face panel 204 also includes holes 205 through which the cool air that exchanges heat with the coil 203 and passes through the gaps between the members that form the coil 203 passes as it heads toward the space to be conditioned. The specified space between the coil 203 and the face panel 204 is defined as a lower chamber 213.

Figure 3 shows an example of a variation in the shape of the hole 205 provided in the face panel 204. Figure 3 (A) shows an example in which multiple wing-shaped members 214 are arranged to rotate in the hole 205, and cool air is blown out from the gaps between the swirling wing-shaped members 214. Figure 3 (B) shows an example in which the face panel 204 is made of punched metal. Figure 3 (C) shows an example in which multiple circular holes are provided in the face panel 204.

When the holes 205 have the shape shown in FIG. 3(A), the air blown out from the holes 205 is sent to the air-conditioned space in a swirling manner, suppressing the draft felt by people in the air-conditioned space. This improves the comfort felt by people in the air-conditioned space.

When the holes 205 have the shape shown in FIG. 3(B), cool air is supplied uniformly from the entire surface of the face panel 204. In other words, airflow turbulence is suppressed, so an environment with a high spot cooling effect can be provided in the air-conditioned space. When the holes 205 have the shape shown in FIG. 3(C), a large amount of cool air can be supplied to the air-conditioned space.

Also, as shown in FIG. 2, the DCFCU 20 has a hook 206 for hooking the face panel 204 onto the body of the DCFCU 20.

The DCFCU 20 also includes an open catch 207 that is installed on the DCFCU 20 body and fixes the face panel 204 to the body of the DCFCU 20. The open catch 207 includes a magnet that attaches and fixes the face panel 204, and has a mechanism that pushes the part where the magnet is provided toward the ceiling and then releases the hand from the part, causing the part to pop out toward the target air-conditioned space. In other words, a user can push the part of the face panel 204 where the open catch 207 is provided toward the ceiling from the target air-conditioned space side and then release the hand from the part, causing the part to open slightly toward the target air-conditioned space from the ceiling, and then insert a hand into the open gap and pull it toward the target air-conditioned space side to separate the face panel 204 from the open catch 207.

Then, the user can easily remove the face panel 204 from the installation location by removing the claws 206 from the main body of the DCFCU 20. The DCFCU 20 also includes a fall prevention wire 208 that connects the ceiling space to the face panel 204 and prevents the face panel 204 from falling into the space to be air-conditioned. In other words, the face panel 204 can be easily replaced.

The DCFCU 20 also includes a substrate 210. A control chip 211 that is electrically connected to the fan 201 and controls the operation of the fan 201 is mounted on the mounting surface of the substrate 210. The mounting surface of the substrate 210 also includes a wireless module 212 that can perform wireless communication with an external terminal.

<Desk 30>
Fig. 4 shows an example of the outline of a desk 30 to which a DCFCU 20A is attached. Fig. 4(A) shows an example of the outline of a top view of the desk 30. Fig. 4(B) shows an example of the outline of a cross-section of the desk 30.

As shown in FIG. 4, DCFCU 20A is attached to the underside of tabletop 31 of desk 30. DCFCU 20A is provided with duct 302. Duct 302 has holes through which screws can pass, and duct 302 is fixed by engaging the screws that pass through the holes with holes provided at predetermined positions on the underside of tabletop 31 of desk 30.

The DCFCU 20A also includes two fans 303. As shown in FIG. 4B, the duct 302 includes a housing 304 that houses the fans 303. The fans 303 are arranged side by side on the side of the desk 30 so that air is blown out toward the rear surface of the top plate 31. The fans 303 may also be so-called DC fans in which blades provided on the fan 303 rotate when, for example, a DC current is applied to a motor provided inside the fan 303.

DCFCU20A also has an intake port 341 in the housing 304 that draws in air from the outside when the fan 303 is operating. The intake port 341 is provided in the housing 304 below the fan 303. When DCFCU20A is retrofitted to the underside of the top plate 31 of the desk 30, the intake port 341 is located on the side of the back panel 32 of the desk 30. By providing the intake port 341 and the fan 303 in this manner, the housing 304 can be made thin while having a simple structure. Furthermore, by installing the fans 303 side by side in the horizontal direction, the thickness of the housing 304 can be made thin while the amount of air blown out is increased.

The DCFCU 20A also includes a coil 307. The coil 307 is plate-shaped and is formed from a flow tube member 371 that meanders in a plane. An inlet 373 through which water flows in is provided at the end of the flow tube member 371 that forms the lower part of the coil 307 (the part located near the bottom surface of the storage section 304 in FIG. 4B). An outlet 374 through which water that has passed through the inside of the flow tube member 371 flows out is provided at the end of the flow tube member 371 that forms the upper part of the coil 307. In other words, the water and the air blown out from the fan 303 exchange heat via the flow tube member 371.

The coil 307 is also installed facing up so that the outer surface 372 of the planar meandering flow tube member 371 faces the direction in which the fan 303 is installed. In other words, the coil 307 is not installed upright on a horizontal plane to allow the air blown out from the fan 303 to exchange heat. Therefore, the housing section 304 is made thin.

The duct 302 of the DCFCU 20A also includes a rectangular duct 305 through which the air blown out from the fan 303 and passing through the gaps between the flow tube members 371 of the coil 307 passes when heading toward a seated person. The accommodation section 304 and the duct 305 are in communication. The bottom of the duct 305 is provided in a stepped shape from the bottom surface of the accommodation section 304 toward the back surface of the top plate 31 of the desk 30. The duct 302 also includes an inclined surface 306 at the stepped portion.

DCFCU20A also has a blow-out face 319 at the bottom of the end of desk 30 on the side of duct 305 where the seated person sits. The blow-out face 319 has an air intake port 320 with multiple small holes arranged horizontally. The blow-out air that has passed through duct 305 is supplied to the seated person via air intake port 320. Here, blow-out face 319 is installed at an angle to the horizontal plane, and the air blown out from air intake port 320 travels diagonally upwards towards the upper body of the seated person.

The DCFCU 20A also includes a substrate 310. A control chip 311 that is electrically connected to the fan 303 and controls the operation of the fan 303 is mounted on the mounting surface of the substrate 310. The mounting surface of the substrate 310 also includes a wireless module 312 that can perform wireless communication with an external terminal.

Regarding the dimensions of each part of the duct 302, the length of the duct 305 in the depth direction as seen by a seated person is, for example, about 380 mm. The thickness of the duct 305 is, for example, about 20 mm. The total length of the storage section 304 and the step portion where the storage section 304 and the duct 305 communicate in the depth direction as seen by a seated person is, for example, about 270 mm. The thickness of the storage section 304 is, for example, about 80 mm. The vertical length of the air intake port 320 provided in the blowing face 319 is, for example, about 5 mm.

Also, FIG. 5 shows a DCFCU20AA according to a modified example. As shown in FIG. 5, the DCFCU20AA is a device that does not have a duct 305 and has a reduced depth dimension of, for example, about 300 mm (the thickness is, for example, about 80 mm, similar to the DCFCU20A). With such a DCFCU20AA, when it is retrofitted to a desk 30A having a reinforcing material 33 on the underside of the top plate 31, the DCFCU20AA can avoid the reinforcing material 33.

DCFCU20AA also has an air intake 320A with multiple small holes arranged horizontally, similar to air intake 320, at the top of the seating side of the housing 304A. In other words, air that passes through the gaps between the flow tube members 371A of the coil 307A is supplied to the seated occupant via air intake 320A (details will be described later). Furthermore, the air blown out from air intake 320A travels diagonally upwards towards the upper body of the seated occupant.

DCFCU20AA also has a guide 321 inside the storage section 304A and near the air supply port 320A. The guide 321 guides the air that has passed through the gap between the flow tube members 371A of the coil 307A to the air supply port 320A. Although not shown, the guide 321 also has a rotating part at the connection part with the storage section 304A, and is installed so that it can rotate around the horizontal direction of the desk 30A as the rotation axis. In other words, by changing the direction of the guide 321, DCFCU20AA adjusts the direction and amount of air that has passed through the gap between the flow tube members 371A of the coil 307A and flows into the air supply port 320A. Therefore, the direction and amount of air blown out from the air supply port 320A are also adjusted. DCFCU20AA also has an inclined surface 306A on the side of the seating side of the storage section 304A.

Such a DCFCU 20AA can achieve the same effect as that of the DCFCU 20A shown in Fig. 4 (described later). In addition, even for a desk 30A equipped with a reinforcing member 33, the DCFCU 20AA can be easily installed on the desk 30A without changing the dimensions of the duct 305 to avoid the reinforcing member 33. In addition, according to such a DCFCU 20AA, the side surface on the seating side of the accommodation section 304A is provided with an inclined surface 306A, so that when a seated person sits down, a part of the body of the seated person is prevented from coming into contact with the accommodation section 304A of the DCFCU 20AA. In other words, such a DCFCU 20AA can provide comfort to the seated person.

In addition, with this DCFCU20AA, the direction and amount of air blown out from the air supply port 320A can be adjusted by rotating the guide 321. In other words, this DCFCU20AA is a device that can flexibly respond to the needs of the seated occupant, such as the direction of the air supply, the amount of air supply, and the part of the body that the air supplies hit.

Figure 6 also shows an example of the outline of DCFCU20AB according to another modified example. Figure 6(A) shows an example of the outline of a cross-sectional view of DCFCU20AB. Figure 6(B) shows an example of an oblique view of DCFCU20AB. As shown in Figure 6, DCFCU20AB is retrofitted to a desk 30A. In other words, a reinforcing material 33 is positioned midway through the duct 305B of DCFCU20AB. The duct 305B of DCFCU20AB retrofitted to such a desk 30A has a portion covering the reinforcing material 33 formed by a fabric flexible joint 308.

The above DCFCU20AB can achieve the same effect as that of the DCFCU20A shown in FIG. 4 (described later). In addition, while maintaining the thinness of the duct 305B, the noise generated when the blades of the fan 303B rotate is absorbed by the flexible joint, which absorbs the vibration of the air that generates the noise. This reduces the leakage of the noise to the outside. Therefore, when a seated person sits down, the degree to which the seated person feels the noise of the fan 303B is reduced. This reduces the discomfort felt by the seated person due to the noise. In addition, since the flexible joint has cushioning properties, the discomfort felt by the seated person is reduced even if a part of the seated person's body comes into contact with the flexible joint. In other words, the above DCFCU20AB can provide comfort to the seated person.

<Counter air conditioner 10>
Fig. 7 illustrates an overview of the counter air-conditioner 10. Fig. 7(A) is an example of a side view of the counter air-conditioner 10. Fig. 7(B) is an example of a front view of the counter air-conditioner 10. Fig. 7(C) is a partially enlarged view of the counter air-conditioner 10.

As shown in FIG. 7(A), the counter air conditioner 10 is placed on a counter 19, for example, provided on the second floor of an open-ceiling area in a building. Note that the location where the counter air conditioner 10 is installed is not limited to the counter, and it may be placed at a predetermined height from the bottom of the open-ceiling area. The counter air conditioner 10 includes a three-layer aluminum pipe 101. As shown in FIG. 7(A), the three-layer aluminum pipe 101 is placed under the counter 19 in a position that faces the feet of the user when the user is seated on the counter 19.

As shown in FIG. 7B, the aluminum three-layer pipe 101 includes a cold water supply pipe 101A (an example of the "first heat medium path" of the present invention) through which cold water flowing from the system (an example of the "first heat medium" of the present invention) passes, and a cold water return pipe 101B through which cold water returning to the system passes. The aluminum three-layer pipe 101 also includes a hot water supply pipe 101C (an example of the "second heat medium path" of the present invention) through which hot water flowing from the system (an example of the "second heat medium" of the present invention) passes, and a hot water return pipe 101D through which hot water returning to the system passes.

The countertop air conditioner 10 also has pipes 102 (102A, 102B). Pipes 102 connect the three-layer aluminum pipe 101 to the system. Pipes 102 branch off midway. A cold water supply pipe 101A and a hot water supply pipe 101C are connected to each of the pipes branching off from pipe 102A. Meanwhile, a cold water return pipe 101B and a hot water return pipe 101D are connected to each of the pipes branching off from pipe 102B.

The countertop air conditioner 10 also includes manual valves 104. The manual valves 104 are provided on each of the branch pipes of the pipe 102. More specifically, the manual valve 104A is provided on the pipe 102A connected to the cold water supply pipe 101A. The manual valve 104B is provided on the pipe 102A connected to the cold water return pipe 101B. The manual valve 104C is provided on the pipe 102A connected to the hot water supply pipe 101C. The manual valve 104D is provided on the pipe 102B connected to the hot water return pipe 101D.

By controlling the opening degree of the manual valve 104, it is possible to select whether the water flowing through the three-layer aluminum pipe 101 is cold water or hot water. In other words, when the manual valves 104A and 104B are open and the manual valves 104C and 104D are closed, cold water flows through the cold water supply pipe 101A and the cold water return pipe 101B. Conversely, when the manual valves 104A and 104B are closed and the manual valves 104C and 104D are opened, hot water flows through the hot water supply pipe 101C and the hot water return pipe 101D.

The countertop air conditioner 10 also includes a solenoid valve 105. The solenoid valve 105 is located midway through the piping 102B, on the system side of the location where the manual valves 104 (104B, 104D) are located. By controlling the opening of the solenoid valve 105, the flow rate of cold water or hot water passing through the piping 102 can be adjusted. Thus, the flow rate of cold water or hot water flowing through the three-layer aluminum pipe 101 is adjusted, and as a result, the amount of heat radiated from the surface of the three-layer aluminum pipe 101 is adjusted.

As shown in FIG. 7(C), the counter air conditioner 10 is equipped with a joint 103. The joint 103 connects the three-layer aluminum pipes 101 together. The joint 103 is fixed to the counter 19 with a screw.

<Outside air processing machine 60>
Fig. 8 shows an example of the outline of the outdoor air treatment unit 60. As shown in Fig. 8, the outdoor air treatment unit 60 includes an air supply path 609 through which the sucked outdoor air passes to be supplied to the air-conditioned space, and an exhaust path 610 through which return air from the air-conditioned space passes to be exhausted to the outside of the system. The outdoor air treatment unit 60 also includes a desiccant rotor 602. The desiccant rotor 602 is provided across the air supply path 609 and the exhaust path 610.

The outside air treatment unit 60 also includes a heat exchanger 603 located upstream of the desiccant rotor 602 in the air supply passage 609, and a heat exchanger 604 located downstream of the desiccant rotor 602. The heat exchanger 603 is a heat exchanger for pre-cooling the outside air before it enters the desiccant rotor 602. Thus, cold water passes through the inside of the coil of the heat exchanger 603. The heat exchanger 604 is a heat exchanger for cooling the outside air that has been heated by passing through the desiccant rotor 602. Thus, it is desirable to circulate low-temperature water through the coil of the heat exchanger 604.

The outside air treatment unit 60 also includes a heat exchanger 608 located upstream of the desiccant rotor 602 in the exhaust path 610. The heat exchanger 608 is a heat exchanger for heating the return air from inside the room before it enters the desiccant rotor 602. Therefore, hot water that utilizes heat generated by, for example, biomass CHP (Combined Heat and Power) passes through the inside of the coil.

The outdoor air treatment unit 60 also includes a total heat exchanger 601 that spans the inlet of the air supply path 609 and the outlet of the exhaust path 610. The outdoor air is cooled by heat exchange with return air from the room in the total heat exchanger 601. This reduces the energy required to cool the outdoor air in the heat exchanger 603. The outdoor air treatment unit 60 also includes an air supply fan 605 that supplies air to the space to be air-conditioned at the outlet of the air supply path 609, and an exhaust fan 607 that exhausts return air from the space to be air-conditioned at the outlet of the exhaust path 610.

<Duct unit 70>
The air conditioning system 1 also includes a duct unit 70 connected to the air supply passage 609 of the outdoor air processing unit 60. Fig. 9 shows an example of the outline of the duct unit 70. The duct unit 70 has, for example, one end connected to the air supply passage 609 of the outdoor air processing unit 60 and the other end connected to an outlet 705 of the space to be air-conditioned. The duct unit 70 has a main body 701 connected to the air supply passage 609 of the outdoor air processing unit 60 and a branching portion 706 that branches into four portions midway through the main body 701. The inner diameter of the main body 701 is, for example, about three times the inner diameter of the branching portion 706.

The duct unit 70 also includes a damper 702 capable of adjusting the flow rate of the supply air at each branch 706, and an anemometer 703. The anemometer 703 can measure the volume and temperature of the supply air passing through the branch 706. The anemometer 703 also has a communication module. The anemometer 703 can transmit measured data to an external device (e.g., a computer, a smartphone, etc.) via a network. The damper 702 also has a communication module. The angle of the damper 702 is controlled via the network, thereby adjusting the volume of the supply air passing through the branch 706.

Figure 10 is an example of a cross-sectional view of the branching section 706 in which the anemometer 703 is disposed. As shown in Figure 10, the anemometer 703 is of a vane type and has blades 704. The center of rotation of the blades 704 is disposed at a position that is offset from the center of the branching section 706. For example, if the inner diameter of the branching section 706 is 125 mm or less, the center of rotation of the blades 704 is disposed at a position within 2/3D (D is the inner diameter of the branching section 706) downward from the upper part of the inner wall of the branching section 706. Also, for example, if the inner diameter of the branching section 706 is 150 mm or more, the center of rotation of the blades 704 is disposed at a position approximately 1/6D to 1/2D downward from the upper part of the inner wall of the branching section 706.

In the duct unit of the comparative example, when adjusting the supply air volume, first the air volume of all the outlets 705 is measured when all the dampers are fully open. Next, the air volumes of all the outlets 705 are measured while the dampers are manually operated. The above procedure is then repeated until the supply air volume matches the design air volume. Note that the air volume is measured visually.

In the case of such a duct unit according to the comparative example, the air volume adjustment work is done manually and is therefore cumbersome. In addition, conventional air volume meters may incorporate, for example, a rectifying element. This increases the resistance to ventilation within the duct and increases the transport power required to transport the supply air. In addition, as the air volume is measured visually, there is a risk of operational errors. In addition, as the work must be done by a specialist air volume adjustment company, the costs of trial operation and adjustment are likely to be high.

On the other hand, in the case of the duct unit 70 according to this embodiment, an anemometer 703 is disposed at each of the branching sections 706. Furthermore, measurement data is transmitted from the anemometer 703 to an external device via a network. Therefore, the supply air volume passing through each of the branching sections 706 can be easily grasped using a computer or smartphone at hand. Furthermore, by controlling the damper 702 based on the data measured by the anemometer 703, the supply air volume passing through each of the branching sections 706 can be easily adjusted to the design air volume.

In addition, this adjustment of the supply air volume is performed automatically, which reduces operational errors. In addition, the supply air volume can be adjusted without having to call in a specialist air volume adjustment company. This reduces the cost of trial operation adjustments, etc.

Furthermore, according to the duct unit 70 as described above, the anemometer 703 is arranged so that the center of rotation of the blades 704 of the anemometer 703 is located away from the center of the branching section 706. Here, if the anemometer 703 is installed so that the center of rotation of the blades 704 overlaps with the center of the branching section 706, the wind speed will be measured as being higher than the actual speed. According to this embodiment, such overestimation of the wind speed is suppressed.

In addition, if the center of rotation of the blades 704 is located near the inner wall of the branching section 706, the supply air passing near the inner wall slows down due to friction with the inner wall, and the wind speed is measured as being lower than the actual speed. According to this embodiment, such undermeasurement of the wind speed is suppressed. In other words, according to this embodiment, the measurement accuracy of the wind speed of the supply air is improved.

In addition, the anemometer 703 in this embodiment is a vane type. Therefore, the wind speed in the circular area circumscribed by the blades 704 is measured with high accuracy. From this point of view, it can be said that the measurement accuracy of the wind speed of the supply air is improved.

In addition, because the anemometer 703 is a vane type, the supply air can pass through the gaps between the blades 704. This reduces the airflow resistance in the branching section 706. This reduces the power required to transport the supply air.

<Air-conditioning sofa 90>
When performing individual air conditioning for each user, it is conceivable to install an air conditioner that blows out cool air from an outlet. However, if the cool air hits the user's skin, the user may feel uncomfortable. Therefore, an air conditioner that can perform individual air conditioning without causing discomfort to the user is provided. The air-conditioned sofa 90 is an example of the "air-conditioned chair" of the present invention.

Figure 11 shows a schematic diagram of an air-conditioned sofa 90. The air-conditioned sofa 90 has a seat 901 large enough for multiple people (approximately three adults) to sit on at the same time. The seat 901 has two circular parts. The air-conditioned sofa 90 may be, for example, a type in which temperature-regulated supply air is blown out from the seat 901 (air-conditioned sofa 90A), or a type in which heat is radiated from the seat 901 (air-conditioned sofa 90C).

Figure 12 illustrates an overview of the air-conditioned sofa 90A. Figure 12(A) is an example of a top view of the air-conditioned sofa 90A. Figure 12(B) is an example of a cross-sectional view of the air-conditioned sofa 90A.

As shown in FIG. 12(B), the air-conditioned sofa 90A includes cushions 902 (902A, 902B). The cushions 902 are made of a breathable material.

The air-conditioned sofa 90A also includes a seating section 903 (903A, 903B). The seating section 903 is placed on top of the cushion 902. The seating section 903 has feathers inside, for example. The seating surface 901 (901A, 901B), which is the upper surface of the seating section 903, has multiple openings 918 (918A, 918B) that open in the vertical direction.

The air-conditioned sofa 90A is also provided with a hollow portion 904 (904A, 904B) that forms a hollow portion in the lower portion of the cushion 902. The top surface of the inner wall that forms the hollow portion of the hollow portion 904 becomes the lower surface of the cushion 902.

The air-conditioned sofa 90A also includes rotation rollers 919 (919A, 919B). The rotation rollers 919 are provided on the edge of the underside of the cushion 902. The lower part of the central part of the air-conditioned sofa 90A is fixed to the floor. When the rotation rollers 919 rotate, the cushion 902 rotates around the lower central part of the air-conditioned sofa 90A.

The air-conditioned sofa 90A also includes a pipe 905 (905A, 905B) that has one end communicating with the hollow portion 904 and the other end having an intake port 914 (914A, 914B) for drawing in outside air, as shown in FIG. 12(A). The pipe 905 is made of, for example, glass wool. The outside air intake port 914 of the pipe 905 is provided in the lower center of the body of the air-conditioned sofa 90A.

The air-conditioned sofa 90A also includes a fan 906 (906A, 906B) that draws in outside air midway through the piping 905 and blows it out toward the hollow portion 904. The air-conditioned sofa 90A also includes a guide vane 908 (908A, 908B) downstream of the fan 906 in the piping 905. By controlling the angle of the guide vane 908, the volume and direction of the air supplied to the hollow portion 904 can be adjusted.

The air-conditioned sofa 90A also includes coils 909 (909A, 909B). The coils 909 are disposed between the air inlet 914 and the fan 906. Water that has exchanged heat with well water in the direct system passes through the inside of the coil 909A. Thus, cool air is generated by heat exchange between the outside air drawn in from the air inlet 914A and the surface of the coil 909A.

On the other hand, hot water passes through the inside of coil 909B. Therefore, warm air is generated by heat exchange between the outside air drawn in from intake port 914B and the surface of coil 909B. Therefore, cold air can be supplied from opening 918A of seat surface 901A, and hot air can be supplied from opening 918B of seat surface 901B.

The air-conditioned sofa 90A also includes an outgoing pipe 910 (910A, 910B) and a return pipe 911 (911A, 911B) connected to the coil 909. The outgoing pipe 910A connected to one end of the coil 909A carries cold water that has been heat exchanged with well water in the direct system. The return pipe 911A connected to the other end of the coil 909A carries cold water that has been heat exchanged through the coil 909A.

On the other hand, hot water passes through the supply pipe 910B connected to one end of the coil 909B. And the return pipe 911B connected to the other end of the coil 909B passes the hot water after heat exchange that has passed through the coil 909B. Note that a hole is provided in the floor part on which the air-conditioned sofa 90A is placed. And the supply pipe 910 and the return pipe 911 pass through the hole and are further arranged under the floor.

The air-conditioned sofa 90A also includes a valve 912 (912A, 912B). The valve 912 is provided midway through the outgoing pipe 910. The air-conditioned sofa 90A also includes a temperature sensor 913 (913A, 913B) downstream of the fan 906. The temperature sensor 913 is connected to the valve 912. Thus, the opening of the valve 912 is controlled using temperature information inside the pipe 905 measured by the temperature sensor 913, thereby adjusting the flow rate of cold water or hot water passing through the outgoing pipe 910. In this way, the temperature of the outside air passing over the surface of the pipe 905 is adjusted to the desired temperature.

FIG. 13 illustrates an overview of an air-conditioned sofa 90C. The air-conditioned sofa 90C transfers cold or warm heat to the user instead of cold or warm air.

More specifically, the air-conditioned sofa 90C does not have an opening 918 in the seat surface 901 (901C, 901D). In addition, the air-conditioned sofa 90C has multiple panel units 915 (915C, 915D) below the seating portion 903 (903C, 903D). The multiple panel units 915 are connected in series. The panel units 915 are the same type of panel unit as the floor panel unit 45 (described below).

More specifically, the panel unit 915 includes a metal panel body 916 (916C, 916D) and a tube 917 (917C, 917D) in contact with the panel body 916. Cold water passes through the inside of the tube 917C. The cold water that passes through the tube 917C that is in contact with a specific panel body 916C flows into the tube 917C that is in contact with the other panel body 916C that is connected in series. On the other hand, hot water passes through the inside of 917D. The hot water that passes through the tube 917D that is in contact with a specific panel body 916D flows into the tube 917D that is in contact with the other panel body 916D that is connected in series. The heat of the cold water or hot water is transferred to the panel body 916 via the surface of the tube 917.

The air-conditioned sofa 90C also includes an outgoing pipe 910 (910C, 910D) and a return pipe 911 (911C, 911D) connected to the tube 917. Cold water that has exchanged heat with well water in the direct system passes through the outgoing pipe 910C. The outgoing pipe 910C is connected to a tube 917C that contacts the first panel body 916C in the row of panel bodies 916 connected in series. Therefore, the cold water that has passed through the outgoing pipe 910C flows into the tube 917C that contacts the first panel body 916C.

On the other hand, the return pipe 911C is connected to the tube 917C that contacts the last panel body 916C in the row of panel bodies 916C connected in series. Therefore, the return pipe 911C receives the cold water that has passed through the tubes 917C that contact each of the rows of panel bodies 916C connected in series and has undergone heat exchange.

Meanwhile, hot water passes through the outgoing pipe 910D. The outgoing pipe 910D is connected to a tube 917D that is in contact with the first panel body 916D in the row of panel bodies 916D connected in series. Therefore, the hot water that has passed through the outgoing pipe 910D flows into the tube 917D that is in contact with the first panel body 916D.

On the other hand, the return pipe 911D is connected to a tube 917D that contacts the last panel body 916D in the row of panel bodies 916D connected in series. Therefore, hot water after heat exchange that has passed through the tubes 917D that contact each of the rows of panel bodies 916D connected in series flows into the return pipe 911D.

In addition, the air-conditioning sofa 90C is provided with a valve 912 (912C, 912D) in the middle of the outgoing pipe 910 (910C, 910D) like the air-conditioning sofa 90A. In addition, the air-conditioning sofa 90C is provided with a temperature sensor 913 (913C, 913D) in the middle of the return pipe 911 (911C, 911D). The temperature sensor 913 is connected to the valve 912. Therefore, the opening degree of the valve 912 is controlled using the temperature information inside the return pipe 911 measured by the temperature sensor 913, and the flow rate of cold water or hot water passing through the outgoing pipe 910 is adjusted. Therefore, the temperature of the cold water or hot water flowing into the tube 917 of the panel unit 915 is adjusted to the desired temperature.

(Explanation of each air supply method using indirect well water)
<Ceiling panel unit 40>
The air conditioning system 1 includes a ceiling panel unit 40. Fig. 14 shows an example of an outline of the ceiling panel unit 40. The ceiling panel unit 40 is provided above the ceiling of the space to be air-conditioned. The ceiling panel unit 40 includes a flat coil 401 and a main pipe 402 through which water that has exchanged heat with well water of the indirect system passes.

The ceiling panel unit 40 also includes a panel body 405 (an example of the "radiation panel" of the present invention) that contacts the coil 401. The size of the panel body 405 is 600 mm x 600 mm (an example of the "predetermined value of the size of the radiation panel" of the present invention). The panel body 405 is made of aluminum, for example.

The size of such a panel body 405 is the same as the standard size of commercially available ceiling panels. Therefore, commercially available ceiling panels installed in existing buildings can be easily replaced with the panel body 405.

As shown in FIG. 14, three panel bodies 405 are arranged in series (panel bodies 405A, 405B, and 405C). Similarly, three panel bodies 405 arranged in series are arranged in parallel (panel bodies 405D, 405E, and 405F). The ceiling panel unit 40 also includes a pipe 403 that branches off from the main pipe 402 and supplies water to the coil 401 that contacts the panel body 405A. The pipe 403 also connects the end of the flow tube that forms the coil 401 that contacts one panel body 405 to the tip of the flow tube that forms the coil 401 that contacts the other panel body 405 so that the flow tubes that form each coil 401 are in series.

In addition, a valve 406 is provided in the pipe 403 immediately after branching off from the main pipe 402 to adjust the amount of water flowing inside the pipe 403. Here, the opening degree of the valve 406 may be controlled according to the temperature of the air-conditioned space in which the ceiling panel unit 40 is installed, or the valve may be controlled so that it is always open. In addition, the opening degree of the valve 406 is controlled for each group of six panel bodies 405A-406F as shown in FIG. 14.

The ceiling panel unit 40 also includes a carbon sheet 404. The carbon sheet 404 is provided so as to cover the coil 401. By providing the carbon sheet 404 in this manner, contact between the coil 401 and the panel body 405 is promoted. This promotes heat transfer from the surface of the coil 401 to the panel body 405. In addition, heat from the surface of the coil 401 is also transferred to the panel body 405 via the carbon sheet 404. This means that the heat of the water flowing inside the coil 401 is efficiently transferred to the panel body 405.

<DCFCU20B>
In addition, a DCFCU 20B of the same type as the DCFCU 20 described above is disposed near the ceiling panel unit 40. Thus, a common pipe is used for circulating water from the heat exchanger 42 to the coil 203 of the DCFCU 20B, and a common pipe is used for circulating water from the heat exchanger 42 to the coil 401 of the ceiling panel unit 40. Thus, the coil 203 of the DCFCU 20B can pass water that has exchanged heat with well water of the indirect system, just like the ceiling panel unit 40.

<Floor panel unit 45>
The air conditioning system 1 also includes a floor panel unit 45. Fig. 15 illustrates an overview of the floor panel unit 45. Fig. 15(A) is an example of an overview of the floor panel unit 45. Fig. 15(B) is an example of a partial enlarged view of a joint portion. The floor panel unit 45 is provided under the floor inside the building, and transfers heat to the floor surface.

15 , floor panel unit 45 includes a metal panel body 451. The size of panel body 451 is, for example, 500 mm x 500 mm. Floor panel unit 45 also includes header pipes 452 (452A, 452B). Two header pipes 452 are provided along one side of the rear surface of panel body 451.

The floor panel unit 45 also includes a number of tubes 453. The tubes 453 connect one header pipe 452A to the other header pipe 452B. The tubes 453 are arranged to contact the rear surface of the panel body 451. The length of each of the tubes 453 is approximately the same.

The floor panel unit 45 also includes a pipe 454A through which water that has exchanged heat with well water in the indirect system passes, and a pipe 454B through which water that has passed through the tube 453 returns to the circulation system. The floor panel unit 45 also includes joints 455 (455A, 455B) that connect the pipes 454 (454A, 454B) to the header pipes 452 (452A, 452B). Here, the joints 455A, 455B are provided at the respective ends of the header pipes 452A, 452B located in the central portion of the panel body 451. As shown in FIG. 15B, the floor panel unit 45 is disposed under the floor with the joints 455A, 455B tilted at about 45 degrees with respect to the panel body 451.

The floor panel unit 45 also includes a carbon sheet 456. The carbon sheet 456 is provided so as to cover the tubes 453. By providing the carbon sheet 456 in this manner, contact between the tubes 453 and the panel body 451 is promoted. This promotes heat transfer from the surface of the tubes 453 to the panel body 451. In addition, heat from the surface of the tubes 453 is also transferred to the panel body 451 via the carbon sheet 456. This means that heat from the water flowing inside the tubes 453 is efficiently transferred to the panel body 451.

<Water source heat pump unit 50>
The air conditioning system 1 further includes a water-source heat pump unit 50 downstream of the ceiling panel unit 40 as shown in Fig. 1. Fig. 16 illustrates an overview of the water-source heat pump unit 50. Fig. 16(A) illustrates an overview during cooling operation. Fig. 16(B) illustrates an overview during heating operation. The water-source heat pump unit 50 has a heat pump cycle within the unit. The water-source heat pump unit 50 may be, for example, a heat pump unit manufactured by PMAC.

More specifically, as shown in FIG. 16A, the water heat source heat pump unit 50 includes a water heat exchanger 521, an air heat exchanger 522, a compressor 523, and a circulation pipe through which a heat medium circulates between them. The water heat source heat pump unit 50 also includes an expansion valve 524 in the circulation pipe between the water heat exchanger 521 and the air heat exchanger 522. The heat source water flowing into the coil of the water heat exchanger 521 is water that has absorbed heat in the ceiling panel unit 40B (described later). The heat medium that has exchanged heat with the heat source water in the water heat exchanger 521 passes through the expansion valve 524 and becomes low temperature and low pressure. The low temperature and low pressure heat medium then flows into the air heat exchanger 522. The air sucked from the room is then cooled by heat exchange between the air heat exchanger 522 and the heat medium. The air cooled in the air heat exchanger 522 is circulated in the room. The water-source heat pump unit 50 is equipped with a fan 525 that draws in air from inside the room and blows the air out into the room. The water-source heat pump unit 50 also has a filter 526 in front of the air heat exchanger 522 that removes impurities from the air drawn in by the fan 525.

The heat medium that has exchanged heat with the air in the air heat exchanger 522 flows into the compressor 523. The heat medium that has been compressed in the compressor 523 flows back into the water heat exchanger 521.

The water heat source heat pump unit 50 also includes a four-way valve 527 to which the piping between the air heat exchanger 522 and the compressor 523 and the piping between the water heat exchanger 521 and the compressor 523 are connected. By controlling the opening degree of the four-way valve 527, the circulation direction of the heat medium circulating through the water heat exchanger 521, the air heat exchanger 522, and the compressor 523 changes. That is, by controlling the opening degree of the four-way valve 527, the heat medium flowing out of the water heat exchanger 521 can be compressed by the compressor 523 without passing through the expansion valve 524, in the opposite direction to the direction shown in FIG. 16(A) (FIG. 16(B)). Then, it becomes possible to flow the compressed heat medium into the air heat exchanger 522. Therefore, the air sucked from the room is heat-exchanged with the heat medium in the air heat exchanger 522, and the air is heated. In this way, by controlling the opening degree of the four-way valve 527, the water heat source heat pump unit 50 can be operated in a cooling mode ( FIG. 16A ) or a heating mode (
It is possible to switch between this and FIG.

<Cool Spot Device 55>
The air conditioning system 1 also includes a cool spot device 55. Fig. 17 shows a schematic diagram of the cool spot device 55. Fig. 17(A) is an example of an external perspective view of the cool spot device 55. Fig. 17(B) is an example of a top view of the cool spot device 55. Fig. 17(C) is an example of a bottom view of the cool spot device 55.

As shown in FIG. 17, the cool spot device 55 includes a main body 501. The outer shape of the main body 501 is semi-cylindrical and has a cavity inside. The dimensions of the main body 501 are, for example, a height of 2000 mm, a width of 500 mm, and a depth of 200 mm.

The cool spot device 55 also includes a door 502. The door 502 is provided overlapping the front of the main body 501 as shown in FIG. 17(B). The right end of the door 502 is connected to the main body 501 via a hinge or the like. The door 502 is opened by pulling the left end towards the user. By opening the door 502 in this manner, maintenance of the components fixed inside the main body 501 becomes possible. The exterior surface of the door 502 is also painted with an ink that changes color depending on the temperature. The ink is, for example, METAMO (registered trademark) manufactured by PILOT Corporation.

The main body 501 and the door 502 of the cool spot device 55 are provided with air outlets 503 and 504, respectively, which communicate with the internal cavity of the main body 501. The air outlets 503 and 504 are circular, and for example, three air outlets are provided along the height direction. Note that the air outlets 503 and 504 overlap when the door 502 is closed.

The cool spot device 55 also includes a DC (direct current) fan 505 inside the main body 501 at the position of the air outlet 503. The DC fan 505 is connected to an outlet 506 at the installation location. When the blades of the DC fan 505 rotate, the air inside the main body 501 is supplied to the space to be air-conditioned via the air outlets 503 and 504.

The cool spot device 55 also includes a button 507. The button 507 is provided on the exterior surface of the door 502. The button 507 is connected to a switch (not shown) that controls the rotation of the blades of the DC fan 505. The switch is provided with a timer, which automatically stops the blades of the DC fan 505 when a predetermined time has elapsed since the blades started to rotate.

The cool spot device 55 also includes an oval duct 508 at its upper portion. The oval duct 508 communicates with the internal cavity of the main body 501. The oval duct 508 also communicates with a pipe through which the cold air generated in the water heat source heat pump unit 50 passes. The inner diameter of the oval duct 508 is, for example, about 150 mm.

The cool spot device 55 also includes an airflow adjustment damper 509. The airflow adjustment damper 509 is provided in front of the oval duct 508, in a pipe through which the cold air generated in the water heat source heat pump unit 50 passes. The amount of cold air passing through the oval duct 508 is adjusted by controlling the opening degree of the valve of the airflow adjustment damper 509. The airflow adjustment damper 509 is manual, but may also be electrically operated.

The cool spot device 55 also has an opening 510 on the underside, as shown in FIG. 17(C). The opening 510 is an opening where an anchor for fixing the cool spot device 55 can be installed.

(Overall system configuration)
<Direct line>
Next, an example of an outline of the overall configuration of the air conditioning system 1 formed from the above-mentioned air supply means will be shown. The air conditioning system 1 includes a pumped water tank 3. The pumped water tank 3 temporarily stores the well water pumped up by the well water pump 2 for a short period of time. The well water pump 2 also adjusts the amount of well water pumped up from the well depending on the water level in the pumped water tank 3.

The air conditioning system 1 also includes a well water supply pump 4. The well water supply pump 4 pumps the well water stored in the pumping tank 3. Here, the well water supply pump 4 adjusts the amount of well water pumped depending on the set mode.

The air conditioning system 1 also includes a heat exchanger 5 (an example of the "heat exchanger" of the present invention). At least a portion of the well water sent from the well water supply pump 4 flows into the primary side of the heat exchanger 5. The air conditioning system 1 also includes a valve 6 that adjusts the amount of well water sent from the well water supply pump 4 to the heat exchanger 5.

The air conditioning system 1 also includes an air-cooled chiller 110 and a heat exchanger 22. The cold water supplied to the primary side of the heat exchanger 22 is generated by the air-cooled chiller 110.

On the other hand, the outdoor air processing unit 60, DCFCU 20, desk 30, and air-conditioned sofa 90 are arranged on the secondary side of the heat exchanger 5. Circulation piping is provided between each of these air supply means and the heat exchanger 5 and heat exchanger 22 to circulate cold water. In addition, the counter air conditioner 10 is connected downstream of the desk 30.

The air conditioning system 1 also includes a direct supply system secondary pump 21 on the secondary side of the heat exchanger 5. When the direct supply system secondary pump 21 operates, it pressurizes the water that has passed through the outside air processor 60, DCFCU 20, desk 30, air-conditioned sofa 90, and counter air conditioner 10 to the secondary side of the heat exchanger 5. The water that flows into the secondary side of the heat exchanger 5 is cooled by heat exchange with well water of the direct system.

The cooled water then flows further into the secondary side of the heat exchanger 22. In the heat exchanger 22, it exchanges heat with cold water sent from the chiller 110. Through this procedure, the water that has passed through the outside air processing unit 60, the DCFCU 20, the desk 30, the air-conditioned sofa 90, and the counter air conditioner 10 is cooled.

The air conditioning system 1 also includes a pump 23. The pump 23 is provided at the secondary side outlet of the heat exchanger 22. When the pump 23 operates, the water cooled in the heat exchanger 22 is circulated again to the outside air processing unit 60, the DCFCU 20, the desk 30, the air-conditioned sofa 90, and the counter air-conditioner 10.

<Indirect system>
The air conditioning system 1 also includes a water tank 9. The water tank 9 is provided, for example, under the floor of the space to be air-conditioned. At least a portion of the well water sent from the well water supply pump 4 flows into the water tank 9 and is stored therein. The water tank 9 also includes a heat storage tank 11 that stores the well water for storing heat for a predetermined period (for example, at night), and a return tank 12 that stores the well water for returning it to the return well.

Here, the well water sent from the well water supply pump 4 flows into the heat storage tank 11. The well water stored in the heat storage tank 11 absorbs heat from the surrounding atmosphere and the return water tank 12 and stores it. The air conditioning system 1 also has a valve 8 for adjusting the amount of inflow. The well water flowing into the return water tank 12 includes well water that has been sent from the well water supply pump 4 to the heat exchanger 5 and has been heat exchanged with secondary water in the heat exchanger 5. The air conditioning system 1 also has a valve 7 for adjusting the amount of well water flowing from the heat exchanger 5 into the return water tank 12.

The air conditioning system 1 also includes a well water heat storage pump 13 that pumps up and delivers well water that has been stored in the heat storage tank 11 and has stored heat. The air conditioning system 1 also includes a heat exchanger 14 (an example of the "heat exchanger" of the present invention) into whose primary side the well water delivered from the well water heat storage pump 13 flows.

The air conditioning system 1 also includes a valve 15 on the primary side of the heat exchanger 14 that adjusts the amount of well water returning from the heat exchanger 14 to the return water tank 12. The air conditioning system 1 also includes a valve 16 that adjusts the amount of well water returning to the return water tank 12 that is pumped up by the well water heat storage pump 13 and mixed with the well water traveling from the heat storage tank 11 to the primary side of the heat exchanger 14.

The air conditioning system 1 also includes a heat exchanger 42. The cold water supplied to the primary side of the heat exchanger 42 is generated by a chiller 110.

On the other hand, the ceiling panel unit 40, floor panel unit 45, and DCFCU20B are arranged on the secondary side of the heat exchanger 42. In addition, a water-source heat pump unit 50 is connected downstream of the ceiling panel unit 40. Circulation piping is provided between each of these air supply means and the heat exchanger 14 and heat exchanger 42, allowing water to circulate.

The air conditioning system 1 also includes a heat storage secondary pump 41 on the secondary side of the heat exchanger 14. When the heat storage secondary pump 41 operates, water that has passed through the ceiling panel unit 40, the floor panel unit 45, the DCFCU 20B, and the water-source heat pump unit 50 is pumped to the secondary side of the heat exchanger 14. The water that has flowed into the secondary side of the heat exchanger 14 is cooled by heat exchange with well water in the indirect system.

The cooled water then flows further into the secondary side of the heat exchanger 42. In the heat exchanger 42, it exchanges heat with the cold water sent from the chiller 110. In this manner, the water that has passed through the ceiling panel unit 40, floor panel unit 45, DCFCU 20B, and water-source heat pump unit 50 is cooled.

The air conditioning system 1 also includes a pump 43. The pump 43 is provided at an outlet on the secondary side of the heat exchanger 42. When the pump 43 operates, the water cooled in the heat exchanger 42 is circulated again to the ceiling panel unit 40, the floor panel unit 45, the DCFCU 20B, and the water-source heat pump unit 50.

The air conditioning system 1 also includes a well water return pump 17. The well water return pump 17 pumps well water stored in the heat storage tank 11 to the return well, and adjusts the starting water level of the water tank 9 so that drainage of the water tank 9 is completed by the time the well water is stored in the heat storage tank 11 and heat storage begins.

(Example of arrangement of each air supply means)
Fig. 18 shows an example of the layout of the air supply means as described above. As shown in Fig. 18, ceiling panel units 40A are provided in a set of six on the ceiling of an interior zone 106 in the center of a room inside the building. Ceiling panel unit 40B is provided on the ceiling of a perimeter zone 107 on the window side. The perimeter zone 107 on the window side faces south. A floor panel unit 45 is provided under the floor of the perimeter zone 107.

As shown in FIG. 18, the DCFCU 20 is also installed on the ceiling of the room. However, the DCFCU 20B placed near the ceiling panel unit 40A uses the same piping system as the ceiling panel unit 40, as described above. A desk 30 is also provided in the interior zone 106. The water-source heat pump unit 50 is installed inside a small room in the room. The cool spot device 55 is also installed in the hallway next to the room in which the water-source heat pump unit 50 is installed.

Figure 19 shows another example of the layout of the air supply means as described above. As shown in Figure 19, the outdoor air processing unit 60 is provided at the entrance 18 inside the building. Although not shown in Figure 19, a duct unit 70 as shown in Figure 9 is provided in the air supply path of the outdoor air processing unit 60. An air-conditioned sofa 90 (air-conditioned sofa 90A or air-conditioned sofa 90C) is provided on the floor of the entrance 18. The entrance 18 is an open space, and the counter air conditioner 10 is provided on a counter 19 provided in the second floor of the open space. The aquarium 9 is provided under the floor of the entrance 18.

(Example of daytime operation)
<Well water supply pump 4>
Next, an operation example of the air conditioning system 1 will be described. The air conditioning system 1 has two operation modes, for example, a day mode and a night mode. In the day mode, the amount of well water pumped up from a well and sent from the well water supply pump 4 to the primary side of the heat exchanger 5 is adjusted so that the outlet temperature A (see FIG. 1) of the secondary side of the heat exchanger 5 becomes a set value (for example, about 17 degrees).

Therefore, the well water supplied from the well water supply pump 4 to the primary side of the heat exchanger 5 is, for example, 500 L/min. The primary side inlet temperature of the well water supplied to the heat exchanger 5 is, for example, about 16 degrees, and the primary side outlet temperature of the well water from the heat exchanger 5 is, for example, about 23 degrees.

In addition, during the day, valve 6 installed in the pipe through which well water passes from well water supply pump 4 to heat exchanger 5 is assumed to be open. Meanwhile, valve 8 installed in the pipe through which well water passes from well water supply pump 4 to heat storage tank 11 is assumed to be closed.

(Direct well water system)
<Direct supply system secondary pump 21>
In the daytime mode, the direct supply system secondary pump 21 arranged on the secondary side of the heat exchanger 5 and the heat exchanger 22 supplies air to the heat exchanger 5 and the secondary side air supply means (outside air processor 60, DC
The amount of cold water circulated between the FCU 20, the desk 30, the air-conditioned sofa 90, and the counter air-conditioner 10 is set as follows: That is, for example, the direct supply system secondary pump 21 operates so that the secondary side inlet temperature of the heat exchanger 5 becomes about 24 degrees and the secondary side outlet temperature of the heat exchanger 5 becomes about 17 degrees.

<Outside air processing machine 60>
As described above, the secondary water cooled in the heat exchanger 5 by the operation of the direct supply system secondary pump 21 is further heat exchanged with the cold water generated in the chiller 110 in the heat exchanger 22 and cooled. The cooled secondary water is then supplied to the heat exchanger 604 (see FIG. 8 ) of the outdoor air processor 60. As the cooled water flows through the heat exchanger 604 in this manner, latent heat is removed from the outdoor air passing through the surface of the heat exchanger 604. The dehumidified and cooled outdoor air is then supplied to the air-conditioned space shown in FIG.

In the above-described outside air treatment device 60, the outside air passing through the surface of the heat exchanger 604 is heated and becomes hot when it is dehumidified in the desiccant rotor 602. Therefore, it is considered that the energy required to cool the outside air in the heat exchanger 604 is high. However, in this embodiment, the cold water flowing in the coil of the heat exchanger 604 is cooled by heat exchange with well water in the direct system. Therefore, it can be said that the energy required to cool the outside air in the heat exchanger 604 is reduced by using well water. In addition, the well water in the direct system is not stored for a long time compared to the well water in the indirect system, and does not store heat, so its temperature is low. Therefore, low-temperature water passes through the coil of the heat exchanger 604. Therefore, it is considered that the degree of reduction in the energy required to cool the outside air in the heat exchanger 604 is large.

<DCFCU20>
In addition, the water cooled on the secondary side of the heat exchanger 5 and the heat exchanger 22 and pumped by the pump 23 is also supplied to the coil 203 (see FIG. 2) forming the DCFCU 20. In the DCFCU 20, the air blown out from the fan 201 is rectified by the baffle plate 202 and directed toward the coil 203 through which the cold water passes. The blown air is cooled as it passes over the surface of the coil 203. The cold air passes through the gaps between the members forming the coil 203 and is supplied to the space to be air-conditioned as shown in FIG. 18 through the holes 205 provided in the face panel 204.

<Desk 30>
The water cooled on the secondary side of the heat exchanger 5 and the heat exchanger 22 and pumped by the pump 23 is also supplied to the coil 307 forming the DCFCU 20A that is attached to the desk 30 (see FIG. 4). Here, FIG. 20 shows an example of a flowchart of the operation of the DCFCU 20A. Also, FIG. 21 shows an example of the outline of the flow of the supply air when the DCFCU 20A is operating.

As shown in FIG. 20, in step S101, the wireless module 312 receives an operation request signal requesting operation of the DCFCU20A from a terminal such as a smartphone owned by the seat occupant (S101). Then, in step S102, the wireless module 312 transfers the operation request signal to the control chip 311 (S102).

In step S103, the control chip 311 generates a control signal to rotate the blades of the fan 303 in accordance with the operation request signal. This causes the blades of the fan 303 to rotate. As the blades of the fan 303 rotate, air is sucked into the fan 303 from the space under the legs of the seated occupant via the intake port 341. Then, as shown in FIG. 21, air is blown out from the outlet 309 of the fan 303 in the direction in which the occupant is seated (S103).

Here, cold water cooled in the heat exchanger 5 and the secondary side of the heat exchanger 22 passes through the inside of the flow tube member 371 of the coil 307. Here, the cold water flows into the flow tube member 371 from an inlet 373 provided at the end of the flow tube member 371 that forms the lower part of the coil 307. Then, while exchanging heat with the air blown out from the fan 303, it flows into the flow tube member 371 that forms the upper part of the coil 307. Then, the cold water flows out from an outlet 374 provided at the end of the flow tube member 371 that forms the upper part of the coil 307. In other words, the temperature of the cold water flowing in the flow tube member 371 that forms the lower part of the coil 307 is low, and the temperature of the cold water increases as it moves upward in the coil 307.

At least a portion of the air blown out from the fan 303 hits the back surface of the top plate 31 and then travels along the outer surface 372 of the coil 307. The air blown out uniformly exchanges heat with the coil 307 and is cooled. The space in the direction of travel of the air blown out is gradually blocked by the outer surface 372, so the flow of the air blown out is smooth. This suppresses pressure loss of the air blown out. The cooled air blown out passes through the gaps between the flow tube members 371.

Then, the blown air that passes through the gap between the flow tube members 371 reaches the step portion where the storage section 304 and the duct 305 communicate. Here, the step portion is provided with an inclined surface 306. Therefore, the blown air that reaches the step portion naturally advances along the inclined surface 306 into the inside of the duct 305 without waste. The blown air then passes through the duct 305 and is supplied to the seated occupant in the air-conditioned space shown in FIG. 18 via the air supply port 320. Here, the DCFCU 20A may be provided with a straightening member such as a louver in the air supply port 320, and the air supply from the air supply port 320 may be adjusted so as to be concentrated on a specific part of the seated occupant, such as the neck.

Here, DCFCU20A is remotely controlled from a terminal such as a smartphone owned by the seat occupant, but DCFCU20B, which is installed in the ceiling, may also be remotely controlled from a terminal such as a smartphone owned by the seat occupant, just like DCFCU20A.

<Counter air conditioner 10>
The water that has passed through the desk 30 (flow pipe member 371 of DCFCU 20A) flows into the pipe 102A of the counter air conditioner 10 (see FIG. 7). The water that has passed through the desk 30 has a temperature of about 21-22 degrees. When the manual valves 104A and 104B are open, the water that flows through the pipe 102A passes through the cold water supply pipe 101A and the cold water return pipe 101B. Thus, cold heat is radiated from the outer surfaces of the cold water supply pipe 101A and the cold water return pipe 101B. The opening of the solenoid valve 105 is controlled to adjust the amount of water flowing through the cold water return pipe 101B so that the temperature of the water flowing through the cold water return pipe 101B is about 20 degrees. The water that has passed through the cold water return pipe 101B is pumped to the secondary side of the heat exchanger 5 after passing through the pipe 102B.

On the other hand, when the manual valves 104A and 104B are closed, the water flowing through the pipe 102A does not pass through the cold water supply pipe 101A and the cold water return pipe 101B. When hot water flows through the pipe 102A and the manual valves 104C and 104D are open, hot water flows through the hot water supply pipe 101C and the hot water return pipe 101D. Therefore, hot heat is radiated from the outer surfaces of the hot water supply pipe 101C and the hot water return pipe 101D. Such hot water is generated, for example, by using heat generated by biomass CHP (Combined Heat and Power). The temperature of the hot water is, for example, about 60 degrees.

The manual valve 104 may be switched, for example, by closing the manual valves 104C and 104D and opening the manual valves 104A and 104B just before the start of summer. Conversely, for example, the manual valves 104A and 104B may be closed and the manual valves 104C and 104D may be opened just before the start of winter.

<Air-conditioning sofa 90A>
The water cooled in the heat exchanger 5 and the secondary side of the heat exchanger 22 and pumped by the pump 23 is also supplied to the coil 909A through the outgoing pipe 910A of the air-conditioned sofa 90A (see FIG. 12). The valve 912A provided in the middle of the outgoing pipe 910A is opened. The temperature of the water is, for example, about 18 degrees. Therefore, the outside air passing through the outer surface of the coil 909A is cooled. Then, cold air is supplied from the opening 918A of the seat 901A. Then, the water that has passed through the coil 909A passes through the return pipe 911A and is pumped to the secondary side of the heat exchanger 5.

When the valve 912A on the outgoing pipe 910A is closed, no water flows into the coil 909A. When the valve 912B on the outgoing pipe 910B is open, hot water flows into the coil 909B. Such hot water is generated, for example, by using heat generated by biomass CHP. Therefore, the outside air passing through the outer surface of the coil 909B is heated. Then, hot air is supplied from the opening 918B of the seat 901B. The temperature of the hot water is, for example, about 60 degrees.

<Air-conditioning sofa 90C>
The water cooled on the secondary side of the heat exchanger 5 and the heat exchanger 22 and pumped by the pump 23 is also supplied to the tube 917C through the outgoing pipe 910C of the air-conditioned sofa 90C (see FIG. 13). The valve 912C provided in the middle of the outgoing pipe 910C is opened. The temperature of the water is, for example, about 18 degrees. Therefore, cold heat is transferred to the panel body 916C in contact with the tube 917C. Therefore, cold heat is also transferred to the seating portion 903C in contact with the panel body 916C. Therefore, cold heat is transferred to the user from the seat surface 901C of the seating portion 903C. Then, the water that has passed through the tube 917C passes through the return pipe 911C and is pumped to the secondary side of the heat exchanger 5.

When the valve 912C on the outgoing pipe 910C is closed, no water flows into the tube 917C. When the valve 912D on the outgoing pipe 910D is open, hot water flows into the tube 917D. This hot water is generated, for example, by using heat generated by biomass CHP. Therefore, hot heat is transferred to the panel body 916D in contact with the tube 917D. Therefore, hot heat is also transferred to the seating portion 903D in contact with the panel body 916D. Therefore, hot heat is transferred to the user from the seating surface 901D of the seating portion 903D. The temperature of the hot water is, for example, about 60 degrees.

(Indirect well water system)
<Well water heat storage pump 13>
The air conditioning system 1 not only uses well water by directly sending it to the heat exchanger 5 using the well water supply pump 4, but also uses well water that has been temporarily stored in the water tank 9 and has been heated by storing heat. The amount of well water pumped up from the heat storage tank 11 by the well water heat storage pump 13 and sent to the primary side of the heat exchanger 14 is adjusted so that the secondary side outlet temperature B (FIG. 1) of the heat exchanger 14 is a set value (for example, about 19 degrees). When the secondary side outlet temperature of the heat exchanger 14 is at such a set temperature, the well water sent from the well water heat storage pump 13 to the primary side of the heat exchanger 14 is, for example, 330 L/min. In this case, the primary side inlet temperature of the well water sent to the heat exchanger 14 is, for example, about 18 degrees, and the primary side outlet temperature of the well water is, for example, about 21 degrees.

<Heat storage system secondary pump 41>
The amount of cold water that the heat storage secondary pump 41 circulates between the heat exchanger 14 and the secondary side air supply means of the heat exchanger 14 (ceiling panel unit 40, floor panel unit 45, DCFCU 20B, and water-source heat pump unit 50) is set as follows: That is, the heat storage secondary pump 41 operates so that the secondary side inlet temperature of the heat exchanger 14 of the cold water becomes, for example, about 22 degrees, and the secondary side outlet temperature of the heat exchanger 14 becomes, for example, about 19 degrees.

<Ceiling panel unit 40>
At least a portion of the water cooled in the heat exchanger 14 and the secondary side of the heat exchanger 42 is further cooled in the heat exchanger 42 by heat exchange with cold water generated in the chiller 110. The water cooled in the heat exchanger 42 is then supplied to the main piping 402 provided in the ceiling panel unit 40 at a temperature of, for example, about 19 degrees (see FIG. 14).

The water flowing through the main pipe 402 flows into the inside of the coil 401 through the pipe 403 branched from the main pipe 402. The panel body 405 is cooled by exchanging heat with the surface of the coil 401. The cooled panel body 405 then radiates cold heat to the space to be air-conditioned (see FIG. 18). The water passing through the coil 401 absorbs the sensible heat absorbed by the panel body 405. As shown in FIG. 14, the water flows from the coil 401 in contact with the panel body 405A to the coil 401 in contact with the panel body 405B, panel body 405C, panel body 405D, panel body 405E, and panel body 405F in that order.

As shown in FIG. 18, the ceiling panel unit 40A installed on the ceiling of the interior zone 106 controls the opening of the valve 406 installed in the piping 403 at intervals, thereby adjusting the temperature of the panel body 405 to, for example, between 19 degrees and 24 degrees.

In addition, a temperature sensor (not shown) is provided in the interior zone 106. The opening of the valve 406 is controlled according to the temperature measured by the temperature sensor. When the temperature in the space to be air-conditioned is close to the desired temperature, the opening of the valve 406 is closed to stop the inflow of water into the coil 401. This makes it possible to suppress the radiation of cold heat from the panel body 405. The opening of the valve 406 is controlled for each set of six ceiling panel units 40 as described above.

On the other hand, as shown in FIG. 18, the ceiling panel unit 40B installed on the ceiling of the perimeter zone 107 keeps the valve 406 open at all times. By controlling the valve 406 in this manner, water always flows through the coil 401 of the ceiling panel unit 40B installed on the ceiling of the perimeter zone 107.

<Water source heat pump unit 50>
The temperature of the water that has passed through the coil 401 of the ceiling panel unit 40B arranged on the ceiling of the perimeter zone 107 is about 22°C to 23°C. Therefore, such water is pressure-fed to the inside of the coil of the water heat exchanger 521 provided in the water heat source heat pump unit 50. In the water heat exchanger 521, the water that has passed through the ceiling panel unit 40B exchanges heat with the heat medium (FIG. 16(A)). The heat medium then flows into the air heat exchanger 522. Then, the air sucked from the room by the fan 525 exchanges heat with the heat medium in the air heat exchanger 522, thereby cooling the air, and as a result, cool air is supplied to the air-conditioned space shown in FIG. 18.

<Cool Spot Device 55>
The cold air generated in the water-source heat pump unit 50 is also supplied to the cool spot device 55 as shown in Fig. 18. More specifically, the air volume of the cold air generated in the water-source heat pump unit 50 is, for example, 1250 m3/h. The opening degree of the valve of the air volume adjustment damper 509 of the cool spot device 55 is controlled to a predetermined opening degree, so that cold air with an air volume of, for example, 200 m3/h flows into the internal cavity of the main body 501.

When the user presses button 507, the blades of DC fan 505 rotate, supplying cool air directly to the user through air outlets 503 and 504. When the user presses button 507 again, the blades of DC fan 505 stop rotating, and the supply of cool air stops. Note that even if the user does not press button 507 again, the rotation of the blades of DC fan 505 is stopped by a timer after a predetermined time has elapsed. Also, air volume adjustment damper 509 is open during the summer and closed during the winter.

<DCFCU20B>
The water cooled in the heat exchanger 14 and the secondary side of the heat exchanger 42, for example at a temperature of about 19° C., also flows into the coil 203 of the DCFCU 20B arranged near the ceiling panel unit 40A in the interior zone 106 (see FIG. 18). Here, the water supplied from the secondary side of the heat exchanger 42 to the DCFCU 20B passes through the same piping as the water supplied from the secondary side of the heat exchanger 42 to the ceiling panel unit 40A as described above.

In the DCFCU20B, the air blown out from the fan 201 is rectified by the baffle plate 202 and directed toward the coil 203 through which the cold water passes. The blown air is cooled as it passes over the surface of the coil 203. The cold air passes through the gaps between the members that form the coil 203 and is supplied to the space to be air-conditioned through the holes 205 provided in the face panel 204.

<Floor panel unit 45>
The water cooled in the heat exchangers 14 and 42, for example at a temperature of about 19° C., is also supplied to the piping 454A of the floor panel unit 45 installed under the floor of the perimeter zone 107 (see FIG. 18 ). The water flowing through the piping 454A flows into the header piping 452A via a joint 455A. Here, the joint 455A is disposed in the central portion of the panel body 451. Therefore, the water that flows into the header piping 452A remains in the header piping 452A for a predetermined time before flowing into each tube 453.

The water flowing out of the header pipe 452A then passes through the inside of the tube 453 and flows into the other header pipe 452B. Thus, the panel body 451 is cooled by heat exchange between the surface of the tube 453 and the back surface of the panel body 451. Then, cold heat is radiated from the surface of the panel body 451. In addition, the heat radiated from the surface of the tube 453 is transferred to the panel body 451 via the carbon sheet 456. Therefore, the heat of the water flowing inside the tube 453 is efficiently transferred to the panel body 451. In addition, the water passing through the tube 453 absorbs the sensible heat absorbed by the panel body 451.

In addition, the water flowing out of each of the tubes 453 remains in the header pipe 452B for a predetermined period of time because the joint 455B is located in the center of the panel body 451. The water that passes through the header pipe 452B then flows into the pipe 454B via the joint 455B. The water that flows into the pipe 454B is then circulated to the secondary side of the heat exchanger 14.

In the above example, water that has been subjected to heat exchange with well water of an indirect system is passed through the tubes 453 of the floor panel unit 45 installed in the south-facing perimeter zone 107. However, when it is winter and the floor panel unit 45 is installed in the north-facing perimeter zone 107, hot water may be passed through the tubes 453. Such hot water is generated, for example, by using heat generated by a biomass CHP. The hot water is then passed through the tubes 453 via the pipes 454A. With such a floor panel unit 45, it is possible to suppress the occurrence of a cold draft in the north-facing perimeter zone 107.

(Example of nighttime operation)
<Well water supply pump 4>
In the night mode, the valve 6 provided in the pipe through which the well water supplied from the well water supply pump 4 to the heat exchanger 5 passes is closed. On the other hand, the valve 8 provided in the pipe through which the well water passes from the well water supply pump 4 toward the heat storage tank 11 is opened. Then, the well water supply pump 4 sends the well water toward the heat storage tank 11 until a set amount of well water is stored in the heat storage tank 11. Here, the amount of well water stored in the heat storage tank 11 may be determined, for example, by the weather (temperature, humidity forecast, etc.) of the next day. Here, the water tank 9 including the heat storage tank 11 is installed under the floor of the air-conditioned space as shown in FIG. 19. Therefore, the well water stored in the heat storage tank 11 absorbs heat from the air-conditioned space at night. In other words, the air-conditioned space shown in FIG. 19 is cooled by the well water stored in the heat storage tank 11 at least at night.

(Action and Effect)
<Overall Air Conditioning System 1>
According to the above air conditioning system 1, well water is supplied to the primary side of the heat exchanger 5 by the well water supply pump 4. Such well water is used to cool the water flowing into the secondary side of the heat exchanger 5. Therefore, according to the above air conditioning system 1, the amount of heat required for the DCFCU 20B, desk 30 (DCFCU 20A), counter air conditioner 10, and outside air processing unit 60 arranged on the secondary side of the heat exchanger 5 to generate cool air is reduced.

Furthermore, according to the air conditioning system 1 as described above, well water stored in the water tank 9 is supplied to the primary side of the heat exchanger 14. Such well water is used to cool the water flowing into the secondary side of the heat exchanger. Therefore, according to the air conditioning system 1 as described above, the amount of heat required for the ceiling panel unit 40, DCFCU 20B, floor panel unit 45, and water heat source heat pump unit 50 arranged on the secondary side of the heat exchanger 14 to generate cold air or cold heat is reduced. Thus, energy savings are realized.

The temperature of the well water pumped up from the well by the well water pump 2 and sent as is is low. However, as described above, there is a possibility that the amount of well water pumped up by the well water pump 2 may be limited. Therefore, it is considered that the amount of low-temperature well water is limited. However, according to the air conditioning system 1 described above, such low-temperature well water with a limited amount is assigned to the outside air processing unit 60 that performs latent heat treatment. Furthermore, such direct system well water is assigned to the DCFCU 20, desk 30 (DCFCU 20A), counter air conditioner 10, and air-conditioned sofa 90, which individually supply cold air to the air-conditioned space. In other words, according to the air conditioning system 1 described above, even if the amount of well water pumped from the well is regulated, it is ensured that the latent heat is removed from the air-conditioned space to cool it. In addition, it is possible to meet the demands of individual users.

In addition, when the amount of well water pumped up is restricted, it is possible that the well water may not be able to absorb the heat generated in the air-conditioned space as desired. However, according to the air-conditioning system 1 described above, the well water stored in the water tank 9 at night is supplied to the primary side of the heat exchanger 14 during the day and is used to cool the water flowing into the secondary side of the heat exchanger 14. In other words, according to the air-conditioning system 1 described above, even if a large amount of heat is generated from the air-conditioned space during the day when the amount of well water pumped up is restricted, the system can respond to such a situation and air-condition the air-conditioned space as desired.

The well water supplied to the primary side of the heat exchanger 14 is water that has stored heat in the water tank 9. Therefore, the well water with an increased temperature exchanges heat with the water flowing into the secondary side in the heat exchanger 14. Therefore, the temperature of the water flowing into the secondary side exchanges heat with the well water in the heat exchanger 14, and the temperature (approximately 19 degrees) flowing into the ceiling panel unit 40, the water-source heat pump unit 50, the DCFCU 20B, and the floor panel unit 45 is higher than the temperature (approximately 17 degrees) of the water that has exchanged heat with the well water in the heat exchanger 5 flowing into the DCFCU 20, the desk 30 (DCFCU 20A), the outside air processing unit 60, and the air-conditioned sofa 90.

However, the ceiling panel unit 40 is a unit in which the panel body 405 removes sensible heat from the space to be air-conditioned. The floor panel unit 45 is a unit in which the panel body 451 removes sensible heat from the floor. The DCFCU 20B is a unit in which the sensible heat is removed from the outside air passing through the surface of the coil 203. The water source heat pump unit 50 is a device that can cool air using water at about 21-22 degrees as a heat medium. In other words, the ceiling panel unit 40, the water source heat pump unit 50, the DCFCU 20B, and the floor panel unit 45 are devices that can generate cold air or cold heat using high-temperature water. In other words, such an air conditioning system 1 determines whether to place multiple air conditioners in a location that uses well water from a direct system or in a location that uses well water from an indirect system depending on the function of the air conditioner. Therefore, the well water is used without waste.

In addition, this type of air conditioning system 1 is equipped with a DCFCU 20 that uses well water from a direct system in the space to be air-conditioned, a desk 30 (DCFCU 20A), a counter air conditioner 10, an outside air processing unit 60, and an air-conditioned sofa 90. The well water that has been heated by storing heat is then used by the ceiling panel unit 40, the water-source heat pump unit 50, the DCFCU 20B, and the floor panel unit 45. By combining multiple air conditioning devices in this way, the air conditioning effect of the space to be air-conditioned can be maintained or increased.

Furthermore, according to the above air conditioning system 1, well water is stored in the water tank 9 at night when the operation of the air conditioning system 1 is reduced. Furthermore, the water tank 9 is installed under the floor of the space to be air conditioned, as shown in FIG. 19. Therefore, the well water stored in the water tank 9 can absorb and store the heat contained in the space to be air conditioned. Therefore, the rise in temperature in the space to be air conditioned can be suppressed even during the nighttime when the operation of the air conditioning system is reduced. This reduces the air conditioning load in the space to be air conditioned the next day. In other words, it can be said that the well water is being used effectively.

Furthermore, according to the above air conditioning system 1, even if the secondary water that exchanges heat with well water in the heat exchanger 5 or heat exchanger 14 is not adjusted to the desired temperature, the water can be adjusted to the desired temperature because it is heat exchanged with the cold and hot water supplied from the chiller 110. Therefore, such an air conditioning system 1 can suppress fluctuations in the temperature of the cold water that flows out from the secondary side of the heat exchanger 5 or the secondary side of the heat exchanger 14 and is supplied to each air supply means that forms the air conditioning system 1. Therefore, fluctuations in the temperature of the cold air generated by each air supply means are suppressed. Therefore, cold air with suppressed temperature fluctuations is supplied to the air conditioned space, and the comfort felt by the user in the air conditioned space is maintained.

In addition, according to the above air conditioning system 1, the well water supply pump 4 adjusts the amount of well water sent to the water tank 9. Therefore, the well water stored in the water tank 9 absorbs heat from the surroundings of the water tank 9 (for example, the air-conditioned space shown in FIG. 19), and the degree of heat storage can be adjusted according to the environment.

<Function and effect of each air supply means>
<Ceiling panel unit 40>
Incidentally, when adjusting the temperature of a space to be air-conditioned using only the ceiling panel unit 40, it is possible to install the ceiling panel unit 40 on the entire surface of the ceiling. Then, it is possible to uniformly adjust the amount of water flowing through the coil 401 in contact with the ceiling panel unit 40.

However, in such a case, the power of the pump 43 that transports the indirect system well water and the water that has undergone heat exchange in the heat exchanger 14 increases. This makes it difficult to achieve energy savings. It is also difficult to change the flow rate of water flowing through the coil 401 between the interior zone 106 and the perimeter zone 107. In addition, if the ceiling panel unit 40 is large enough to cover the entire surface of the space to be air-conditioned, it is difficult to incorporate it into a system ceiling. Furthermore, if the layout of the room is changed, it is difficult to change the installation position of the ceiling panel unit 40 without changing the framework of the building.

On the other hand, with the ceiling panel unit 40 as described above, the opening degree of the valve 406 is controlled for each set of six ceiling panel units 40. This reduces the power of the pump 43 that transports the well water of the indirect system and the water that has exchanged heat in the heat exchanger 14. This reduces the use of the well water stored in the water tank 9 that exchanges heat with the water in the heat exchanger 14. Therefore, although the air conditioning system 1 described above also uses well water to generate cool air in other air conditioning devices such as the DCFCU 20B, it is possible to effectively use well water and achieve energy savings even when multiple air conditioning devices are installed.

The ceiling panel unit 40 as described above is also arranged in the same space as the DCFCU 20B (see FIG. 18). Therefore, cold air is also supplied to the space to be air-conditioned from the DCFCU 20B. Therefore, even if the temperature of the well water is high and the cold heat radiated from the panel body 405 is small, the space to be air-conditioned is adequately cooled.

In addition, in the ceiling panel unit 40A installed in the interior zone 106, the opening of the valve 406 is controlled according to the measured temperature of the interior zone 106. Therefore, the amount of water flowing into the coil 401 for each small area in the room can be reduced. Therefore, the flow rate of the water flowing into the coil 401 and the well water that exchanges heat in the heat exchanger 14 can be reduced. Also, the power of the pump 43 that pressurizes the water flowing into the coil 401 can be reduced. Therefore, energy savings can be achieved by making effective use of the well water. It can also be said that each small area in the room can be individually air-conditioned.

The opening of the valve 406 is controlled so that water always flows through the coil 401 of the ceiling panel unit 40B installed in the perimeter zone 107. This makes it possible to suppress fluctuations in room temperature in the perimeter zone 107, which is exposed to sunlight during the daytime near a south-facing window. Therefore, the above-mentioned ceiling panel unit 40 is a highly convenient device that can make the temperature of the air-conditioned space uniform even if there are areas with different air-conditioning loads in the air-conditioned space.

Furthermore, according to the above-described ceiling panel unit 40, the size of the panel body 405 is 600 mm x 600 mm. Six are arranged in a set in the order shown in FIG. 14. Therefore, the ceiling panel unit 40 is a ceiling panel unit of a size that can be easily incorporated into a system ceiling. Furthermore, even if the layout of the room is changed, the installation position of the ceiling panel unit 40 can be changed without changing the framework of the building. This reduces installation costs.

Moreover, the ceiling panel unit 40 as described above shares a common pipe for circulating water from the heat exchanger 42 and a pipe for circulating water from the heat exchanger 42 to the nearby DFCFU 20B.
This also reduces installation costs.

<Floor panel unit 45>
The floor panel unit 45 as described above can suppress fluctuations in room temperature in the perimeter zone 107, which is located near a south-facing window and is constantly exposed to sunlight during the day.

In addition, according to the floor panel unit 45 described above, the length of each of the tubes 453 is approximately the same. Therefore, the frictional force that the water flowing through each of the tubes 453 receives from the inner wall of the tube 453 is uniform. Therefore, the flow rate of the water flowing through each of the tubes 453 is approximately the same. Therefore, the panel body 451 is uniformly cooled. Therefore, the floor of the perimeter zone 107 as shown in FIG. 18 is uniformly cooled.

In addition, with the floor panel unit 45 described above, water flowing into the tube 453 remains in the header pipe 452A for a predetermined period of time. Also, water flowing out of the tube 453 remains in the header pipe 452B for a predetermined period of time. This promotes cooling of the panel body 451 in contact with the header pipes 452A and 452B.

<Water source heat pump unit 50>
Moreover, according to the air conditioning system 1 as described above, the water flowing into the water heat exchanger 521 of the water heat source heat pump unit 50 is water that has absorbed the sensible heat of the panel body 405 in the ceiling panel unit 40B installed in the perimeter zone 107. In other words, the water heat source heat pump unit 50 reuses the water that has absorbed the sensible heat in another device to generate cold air. Therefore, such an air conditioning system is an efficient system that uses well water without waste. Furthermore, the water heat source heat pump unit 50 can be individually air-conditioned only when the small room in which it is installed is being used. Therefore, energy conservation is realized for the air conditioning system 1 as a whole.

<Cool Spot Device 55>
Furthermore, with the above-described cool spot device 55, a user entering through the entrance of the building can press the button 507 to directly supply low-temperature cold air to the user. This allows the user to be instantly cooled. When the user is satisfied with the cooling effect and presses the button 507 again, the supply of cold air is stopped. Such a cool spot device 55 can efficiently use the cold air from the water heat source heat pump unit 50 according to the user's preferences to enhance the cooling effect of the user. Furthermore, since the supply of cold air is stopped by pressing the button 507 while responding to the demand of each individual user, energy saving is realized.

In addition, with the cool spot device 55 as described above, the supply of cold air is automatically stopped by the timer even if the user does not press the button 507 again. Therefore, even if the user forgets to press the button 507, the waste of cold air from the water heat source heat pump unit 50 is suppressed.

In addition, the cool spot device 55 described above has a thin depth of approximately 200 mm. Therefore, even if it is installed in a narrow corridor (see Figure 18), it does not interfere with the movement of users.

<Counter air conditioner 10>
As shown in Fig. 19, even if an outside air processing unit 60 is installed on the ceiling of the atrium and an air-conditioned sofa 90 is installed at the entrance (first floor) of the atrium, it is difficult to adjust the thermal environment in the atrium on the second floor. However, with the air-conditioning system 1 described above, the counter air-conditioner 10 is installed on the second floor of the atrium inside the building (see Fig. 19). Therefore, the thermal environment can be adjusted even in the atrium on the second floor.

The countertop air conditioner 10 can also radiate cold toward the user from the feet of the user sitting on the chair on the counter 19. Therefore, even if the temperature of the well water flowing into the primary side of the heat exchanger 5 is high and the temperature of the water passing through the cold water supply pipe 101A is high, the user can feel the cooling effect. The cold transmitted to the user is higher than the cooling effect felt when receiving air supplied from another air conditioner (e.g., the outdoor air processing unit 60) placed in the space in which the countertop air conditioner 10 is installed (an example of "radiant heat equal to or greater than a predetermined value" according to the present invention).

Furthermore, with the air conditioning system 1 as described above, the water that flows into the counter air conditioner 10 is water at about 21-22 degrees that has absorbed the sensible heat of the outside air at the desk 30. In such an open-ceiling area on the second floor, the user can fully feel the cooling effect even with the cold generated by such high-temperature water. In addition, as described above, the user can also feel the cooling effect by radiating cold toward the user from the feet of the user sitting on the chair at the counter 19.

In addition, the countertop air conditioner 10 reuses water that has absorbed sensible heat in other devices to generate cool air. This type of air conditioning system is therefore an efficient system that uses well water without waste. In addition, the amount of water flowing through the cold water supply pipe 101A and the cold water return pipe 101B is adjusted by controlling the opening degree of the solenoid valve 105. This reduces the amount of water that exchanges heat with well water in the direct system in the heat exchanger 5. This also reduces the flow rate of well water that exchanges heat with the heat medium. Therefore, the countertop air conditioner 10 can effectively use well water and achieve energy savings even when multiple air conditioning devices are installed. In addition, by reducing the use of well water, it is possible to easily respond to situations in which the amount of well water that can be pumped from the well is limited.

In addition, in winter, warm air can be provided to the user by flowing hot water through the hot water supply pipe 101C and the hot water return pipe 101D. Therefore, the air conditioning system 1 is a highly convenient air conditioning system.

<DCFCU20>
Furthermore, in the DCFCU 20, the baffle plate 202 absorbs the operating noise of the fan 201. This improves the comfort felt by the user in the air-conditioned space. Furthermore, the air blown out from the fan 201 hits the plate surface of the baffle plate 202, passes through the lateral direction of the plate surface, and heads toward the coil 203. In other words, the air heading toward the coil 203 is rectified, and heat is exchanged with the air uniformly in the coil 203. In other words, the efficiency of heat exchange in the coil 203 is improved.

The fan 201 used in the DCFCU 20 forming the above air conditioning system 1 is a fan that operates using direct current, realizing energy savings. The coil 203 used in the DCFCU 20 is a dry coil that removes sensible heat from the air that is blown out. Therefore, the surface of the coil 203 is dry, which prevents dust and other particles from adhering to the surface. Therefore, the DCFCU 20 does not need to be provided with a filter on the side of the coil 203 that is closer to the space to be air-conditioned. In other words, the DCFCU 20 is structured so that the face panel 204 can be opened and each part can be easily replaced from the side of the space to be air-conditioned.

<DCFCU20B>
Moreover, DCFCU 20B is disposed near ceiling panel unit 40A in interior zone 106. Therefore, the piping through which water flows into coil 401 of ceiling panel unit 40A and water flows into coil 203 of DCFCU 20B can be shared, thereby reducing the installation cost of DCFCU 20B.

<Air-conditioning sofa 90A, 90C>
According to the air-conditioned sofa 90A as described above, cold air hits the clothes of the user sitting on the seat 901A. According to the air-conditioned sofa 90C, cold heat is transferred to the clothes of the user sitting on the seat 901C. This prevents the user from feeling uncomfortable due to the cold air hitting the user's skin directly.

Furthermore, with the air-conditioned sofa 90A as described above, cool air is supplied to the user from close range through the opening 918A. With the air-conditioned sofa 90C as described above, heat is transferred from the panel body 916C through the seating section 903C to the user's clothes. Thus, with the air-conditioned sofa 90A or the air-conditioned sofa 90C, the efficiency of transferring cold heat to the user is improved. This allows the user to be cooled as desired. Furthermore, the user can feel the cooling effect even when the temperature of the well water is high.

In addition, with the air-conditioned sofa 90A and air-conditioned sofa 90C as described above, cold heat can be transmitted to the user from close range, so the user can feel the cooling effect even if the amount of cold heat supplied to the user is small. This makes it possible to reduce the power of the pump 34 that pumps the water. In addition, the use of well water in the direct system that exchanges heat with the water in the heat exchanger 5 is reduced. This makes it possible to effectively use well water and achieve energy savings. In addition, even in situations where the amount of well water that can be pumped from the well is limited, the situation can be easily accommodated.

<Desk 30>
Furthermore, according to the DCFCU 20A that is retrofitted to the desk 30 as described above, even if the specifications of the DCFCU 20A or the desk 30 are changed after the DCFCU 20A is retrofitted to the desk 30, the DCFCU 20A can be removed from the desk 30 by removing the screws that fasten the DCFCU 20A to the desk 30. Then, the DCFCU 20A whose specifications have been changed can be easily fixed again to the desk 30. In other words, according to the DCFCU 20A as described above, it is possible to easily accommodate changes in specifications.

The DCFCU 20A as described above has a simple structure because it is formed from the fan 303 and the coil 307. This reduces the weight of the DCFCU 20A, making it easy to change the layout of the DCFCU 20A. The DCFCU 20A as described above can be removed from the desk 30 for easy maintenance. In other words, the DCFCU 20A as described above is easy to handle.

In addition, according to the DCFCU 20A as described above, since it is attached to the underside of the top plate 31 of the desk 30, the desk 30 does not need to have space to accommodate the DCFCU 20A, and the freedom of desk 30 selection is improved.In addition, according to the DCFCU 20A as described above, since it is attached to the underside of the top plate 31 of the desk 30, there is no need to customize the parts that form the DCFCU 20A to match the desk 30.This reduces initial costs.

Moreover, according to the DCFCU 20A as described above, the fan 303 is installed on the rear side as seen from the seated person. Therefore, the degree to which the seated person feels the operating sound of the fan 303 is reduced. Furthermore, the rear side as seen from the seated person is a place where the legs of the seated person are less likely to come into contact with compared to a place in front of the seated person when the seated person sits down. Therefore, even if the size of the fan 303 installed in that place is made large, the legs of the seated person are prevented from hitting the bottom surface of the housing portion 304 that houses the fan 303 when the seated person sits down. In other words, by installing a large-sized fan 303, the output of the fan 303 is suppressed, and the operating sound of the fan 303 is reduced.

In addition, with the DCFCU20A as described above, the space in which the air blown out from the fan 303 travels toward the seated occupant is narrowed in the direction of travel by the outer surface 372 of the coil 307. Therefore, the blown air flows smoothly through the space while uniformly exchanging heat with the coil 307. This prevents a decrease in the efficiency of heat exchange between the blown air and the coil 307, and also prevents pressure loss of the blown air.

In addition, with the DCFCU 20A described above, the outer surface 372 of the coil 307 is placed upright so that it faces the direction in which the fan 303 is installed, so the height dimension of the coil 307 is reduced. This allows the housing 304 of the DCFCU 20A to be made thinner.

In addition, according to the DCFCU20A described above, the duct 305 is rectangular, so that the passage area of the blown air is secured while being made thin. Therefore, while the cool air is appropriately supplied to the seated person, the seated person's legs are prevented from coming into contact with the duct 305, causing discomfort to the seated person. In addition, since the step at the communicating part between the storage section 304 and the duct 305 is provided with an inclined surface 306, the blown air that passes through the gap between the flow tube members 371 of the coil 307 naturally advances along the inclined surface 306 to the seated side of the seated person without waste. Therefore, when the blown air enters the duct 305 from the storage section 304, pressure loss due to hitting the step is prevented.

The cross-sectional size of the duct 305 is smaller than the cross-sectional size of the accommodation section 304 in the direction from the location where the fan 303 is installed toward the seated side of the seated person. Therefore, the flow rate of the air blown out from the outlet 309 of the fan 303 increases when it enters the duct 305. Therefore, air with an appropriate force is supplied toward the seated person from the air supply port 320 at the end of the duct 305 on the seated side of the seated person.

Furthermore, with a desk 30 equipped with the above-mentioned DCFCU 20A, air is drawn into the fan 303 from the space under the legs of the seated person (the space below the tabletop), and temperature-adjusted air is blown out to the seated person. Therefore, if warm air accumulates in the space under the legs of the seated person, the warm air can be removed and cool air can be supplied to the seated person. In other words, a desk 30 equipped with the above-mentioned DCFCU 20A can provide comfort to the seated person.

<Other Modifications>
Regarding the above-mentioned ceiling panel unit 40, the coil 401 of the ceiling panel unit 40B installed in the perimeter zone 107 does not need to be constantly supplied with water. Conversely, the coil 401 of the ceiling panel unit 40A installed in the interior zone 106 may be constantly supplied with water.

Furthermore, with respect to the countertop air conditioner 10, the aluminum three-layer pipe 101 may be formed from a pipe through which either cold water or hot water passes.

In addition, the air conditioning device that uses well water in the direct system in the above embodiment may use well water in the indirect system. Conversely, the air conditioning means that uses well water in the indirect system may use well water in the direct system.

In the above embodiment, the well water supply pump 4 operates in two modes, but the operation modes are not limited to two. In the above embodiment, the amount of well water flowing into the primary side of the heat exchanger 5 is adjusted so that the outlet temperature of the cold water on the secondary side of the heat exchanger 5 becomes a predetermined temperature in the daytime mode, but the adjustment of the amount of well water flowing into the primary side of the heat exchanger 5 is not limited to this example. Similarly, the well water heat storage pump 13 adjusts the amount of well water flowing into the primary side of the heat exchanger 14 so that the outlet temperature of the cold water on the secondary side of the heat exchanger 14 becomes a predetermined temperature, but the adjustment of the amount of well water flowing into the primary side of the heat exchanger 14 is not limited to this example.

The locations where each air conditioner is installed are not limited to the above examples. The chiller 110 does not have to be provided. In other words, the heat exchanger 22, 42 to which the chilled water is supplied does not have to exchange heat with the chilled water used in each air supply means. The location where the water tank 9 is installed is not limited to under the floor of the space to be air-conditioned.

In addition, in the above embodiment, the examples in which each air supply means supplies cold air or cold heat to the space to be air-conditioned have been mainly shown, but for example, in winter, each air supply means may supply warm air to the space to be air-conditioned. The heat medium that absorbs cold heat to generate such warm air in each air supply means may be heated by heat exchange with well water. Also, the well water in the water tank 9 may absorb cold heat from the space to be air-conditioned and store it.

In the above embodiment, the fan 303 of the DCFCU 20A, which is attached to the desk 30, is installed so that the air blown out faces the back surface of the tabletop 31. The outer surface 372 of the flow tube member 371 is installed facing up so that it faces the direction in which the fan 303 is installed. However, the air outlet 309 of the fan 303 does not have to face the back surface of the tabletop 31. The outer surface 372 does not have to be installed facing up so that it faces the direction in which the fan 303 is installed. For example, the air outlet 309 of the fan 303 may be installed facing the side of the tabletop 31 of the desk, and the outer surface 372 of the coil 307 may be installed at a predetermined angle so as to narrow the space in the direction of travel of the air blown out from the fan 303 when viewed from the fan 303.

In addition, in the above embodiment, the bottom of the pipe 305 is stepped toward the back surface of the top plate 31 of the desk 30 with respect to the bottom surface of the storage section 304, but this stepped portion does not have to be provided. Also, if this stepped portion is provided, the inclined surface 306 does not have to be provided in the stepped portion.

In addition, in the above embodiment, an example was shown in which the DCFCU20A is attached to a desk 30 used by a seated person, but the DCFCU20A may also be attached to a desk used by a user in a standing position.

Although one example of a preferred embodiment of the present invention has been described above, the present invention is not limited to the illustrated form. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the ideas described in the claims, and it is understood that these also naturally fall within the technical scope of the present invention. In addition, the embodiments and modified examples disclosed above can be combined with each other.

1. Air conditioning system: 10. Counter air conditioner: 20. DCFCU: 30, 30. Desk: 40. Ceiling panel unit: 45. Floor panel unit: 50. Water source heat pump unit: 60. Outdoor air treatment unit: 55. Cool spot device: 70. Duct unit: 90. Air conditioned sofa: 110. Chiller:
2. Well water pumping pump: 3. Pumping tank: 4. Well water supply pump: 5. Heat exchanger: 6, 7, 8. Valves: 9. Tank: 11. Heat storage tank: 12. Return tank: 13. Well water heat storage pumping pump: 14. Heat exchanger: 15, 16. Valves: 17. Well water return pump: 18. Entrance: 19. Counter: 21. Supply system secondary pump: 22. Heat exchanger: 23. Pump: 31. Tabletop: 32. Skirting: 33. Reinforcement: 34. Pump: 41. Heat storage system secondary pump: 42. Heat exchanger: 43. Pump:
101: Three-layer aluminum pipe; 102: Piping; 103: Joint; 104: Manual valve; 105: Solenoid valve:
106. Interior Zone: 107. Perimeter Zone:
401: Coil; 402: Main piping; 403: Piping; 404: Carbon sheet; 405: Panel body; 406: Valve:
451: Panel body; 452: Header piping; 453: Tube; 454: Piping; 455: Joint; 456: Carbon sheet:
501: Main body; 502: Door; 503, 504: Air outlet; 505: DC fan; 506: Outlet; 507: Button; 508: Oval duct; 509: Air volume adjustment damper; 510: Opening:
521: Water heat exchanger: 522: Air heat exchanger: 523: Compressor: 524: Expansion valve: 525: Fan: 526: Filter: 527: Four-way valve:
701: Main body; 702: Damper; 703: Anemometer; 704: Blade; 705: Outlet; 706: Branching portion:
901: Seat: 902: Cushion: 903: Seating section: 904: Hollow section: 905: Piping: 906: Fan: 908: Guide vane: 909: Coil: 910: Supply pipe: 911: Return pipe: 912: Valve: 913: Temperature sensor: 914: Intake port: 915: Panel unit: 916: Panel body: 917: Tube: 918: Opening: 919: Rotation roller

Claims (3)

An air conditioning device that can be used in an air conditioning system that uses well water to adjust the temperature of a space to be air-conditioned,
a heat medium path through which the heat medium passes after being cooled by a heat exchanger that exchanges heat with well water;
A radiant panel for an interior surface that can transfer heat from a part of the heat medium path and radiates cold heat of the heat medium from a part of an interior surface that forms the air-conditioned space in which the air temperature is adjusted by the air-conditioning system;
a valve capable of adjusting the flow rate of the heat medium passing through the radiant panel;
The heat medium path is also provided with a heat pump unit that uses the heat of the heat medium after passing through the radiation panel, which is an air conditioning device that uses the heat medium cooled by the heat exchanger other than the radiation panel.
Air conditioner. A plurality of the radiating panels are provided,
The size of the radiant panel is 600 mm x 600 mm or less, which is the same as the standard size of commercially available ceiling panels installed in existing buildings, so that the panel can be easily replaced with commercially available ceiling panels installed in existing buildings.
The plurality of radiation panels are grouped together, and the valve is controlled to adjust the flow rate of the heat medium flowing through each of the heat medium paths capable of transferring heat to the group of radiation panels.
2. An air conditioner according to claim 1. The valve is controlled so that the heat medium always passes through the heat medium path of the air conditioner arranged in a perimeter zone of the space to be air conditioned,
The valve is controlled so that a flow rate of the heat medium passing through the heat medium path of the air conditioner arranged in an interior zone of the space to be air conditioned changes according to a temperature of the interior zone.
3. An air conditioner according to claim 1 or 2.

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