JP3558698B2 - Underfloor air conditioning system - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an underfloor air-conditioning system that uses a double underfloor space provided under the floor of an indoor space as a supply chamber for air-conditioned air and blows out air-conditioned air from the double underfloor space into the room to air-condition the room. It is.
[0002]
[Prior art]
In recent years, in office buildings and the like, a double underfloor space is formed on an indoor floor slab, and conditioned air such as cool air or warm air is supplied to the double underfloor space. Underfloor air-conditioning, which blows air into a room from a floor outlet installed in a room or the like, and air-conditions the room, is becoming widespread. Underfloor air conditioning uses a double underfloor space under the floor at approximately the same pressure as the indoor space, and a separate fan provided at the floor outlet to supply conditioned air into the room. It is roughly divided into two types: a pressure type in which conditioned air is blown out from a floor outlet by adjusting to a high pressure. Recently, underfloor air conditioning is often adopted when introducing a free access floor at the time of office renewal, and it is often not possible to increase the double underfloor space in renewal. It is thought that the pressure method will become mainstream.
[0003]
Conventionally, in this type of underfloor air-conditioning system, as a method for reducing the variation in the amount of air blown out from the floor outlet, for example, a method disclosed in JP-A-4-36537 and JP-A-4-36538 is known. was there. As a method for reducing the variation in the speed and pressure of the conditioned air in the double underfloor space, for example, there is a method disclosed in Japanese Patent Application Laid-Open No. 4-110560.
[0004]
[Problems to be solved by the invention]
However, in such a conventional underfloor air conditioning system, as a method of reducing the variation in the amount of air blown out from the floor outlet, as the distance from the air conditioner increases, the height of the double underfloor space is gradually reduced. are construction Te, or because the double floor space as the distance from the air conditioner is away is construction continuously becomes narrower as, Ri construction difficult der double bed, a step in the floor of the indoor space There accompanied risk walking in the room to produce, and restricted to the interior layout and blow because not any consideration is given variations in temperature, is a problem that it is difficult to eliminate the horizontal temperature variations in the room there were. In the conventional underfloor air conditioning system, when the double underfloor space is about 100 mm, the long underfloor space is provided with a long chamber having a large number of openings in the double underfloor space. although consideration has been made in terms of reducing the variation in the velocity and pressure of the air, for closing using a part of the elongated chamber of the double floor space low have floor height, elongated There is a problem that fan power on the air conditioner side may increase due to pressure loss at the opening of the chamber.
[0005]
The present invention has been made to solve the above problems, and reduces the capacity of an air conditioner, can reduce the size, and makes the temperature distribution of the double underfloor space uniform, thereby reducing the variation in the outlet temperature from each floor outlet. Accordingly, a first object is to provide an underfloor air conditioning system capable of reducing unevenness in temperature distribution in a horizontal direction in an indoor living area.
[0006]
A second object is to provide an underfloor air conditioning system capable of making the temperature distribution and the static pressure distribution in the double underfloor space uniform and stabilizing the load processing capacity at each floor outlet.
[0007]
A third object is to provide an underfloor air-conditioning system capable of relocating an auxiliary heat source and a local booster when a layout is changed.
[0008]
A fourth object is to provide an underfloor air-conditioning system that can adjust the pressure increasing direction of the local pressure increasing means.
[0009]
A fifth object is to provide an underfloor air-conditioning system that can introduce fresh outside air and that can be installed in a room space relatively freely without requiring a machine room.
[0010]
A sixth object is to provide an underfloor air-conditioning system capable of uniformizing the temperature and static pressure distribution in a space under a double-floor by setting an air-conditioner installation location near the center of the room even in a layout with a complex double-floor shape. Is to do.
[0011]
[Means for Solving the Problems]
A first means for achieving the first object of the present invention is to provide a double underfloor space formed on a floor slab using a double floor panel as a chamber for supplying conditioned air from an air conditioner. In an underfloor air-conditioning system that blows conditioned air into a room from a floor outlet provided on a heavy floor panel, at least one heat exchanger and air blower are provided at a corner where the air conditioner is not installed in the double underfloor space. it is obtained by a structure in which an auxiliary heat source apparatus you like is composed of a fan to equalize the temperature distribution of the double floor space.
[0012]
The second means for achieving the second object is configured such that a local pressure increasing means for locally increasing the pressure in the double underfloor space is provided on the discharge side of the blowing fan of the auxiliary heat source device. is there.
[0013]
A third means for achieving the third object is a temperature control fan unit in which a heat exchanger and a local pressure increasing means are integrated with a double floor panel, and a load processing capacity of the heat exchanger. Variable capacity changing means, boosting force changing means capable of changing the boosting power of the local boosting means, and setting means capable of setting the boosting power and the load processing capacity on the upper surface of the temperature control fan unit and on the indoor side. And a configuration including:
[0014]
A fourth means for achieving the fourth object is a direction changing means for changing the angle of the local boosting means to change the boosting direction, and a direction setting means for setting the boosting direction of the local boosting means. And a temperature control fan unit composed of
[0015]
A fifth means for achieving the fifth object is to provide a ceiling chamber formed between a ceiling slab and a ceiling, and to introduce fresh outside air into the ceiling chamber space to exchange total heat with air inside the ceiling chamber. A total heat exchanger unit for introducing fresh air into the room, an outdoor air introduction duct having an opening in the outdoor and the ceiling chamber, and an outdoor air introduction duct connected to the total heat exchanger unit, An exhaust duct having an opening outside the ceiling chamber and the outside to communicate with the total heat exchanger unit, a box-type air conditioner that draws air from the ceiling chamber, and the box-type air conditioner. And a humidity control unit for controlling the humidity of the air discharged from the machine.
[0016]
A sixth means for achieving the sixth object is an outside air supply duct communicating with the total heat exchanger unit, an outside air outlet communicating with the outside air supply duct and supplying fresh outside air to the room, A columnar shape which is arranged in the interior of a living room in a columnar shape and has a room air intake port having an opening at an upper portion near the room ceiling, and a circular air outlet for blowing out conditioned air radially under the double floor. It is configured to include an air conditioner.
[0017]
[Action]
According to the first aspect of the present invention, the temperature of the air in the double underfloor space can be locally adjusted to make the temperature distribution in the double underfloor space uniform.
[0018]
Further, according to the configuration of the second means, after the air temperature in the double underfloor space is locally adjusted, the pressure is increased in a predetermined direction and supplied, and the temperature and static pressure distribution in the double underfloor space are made uniform. Is what you can do.
[0019]
Further, when the boosting force and the load processing capacity are set by the configuration of the third means, the boosting force can be adjusted by the boosting force changing means, the flow rate flowing into the heat exchanger can be controlled by the capacity changing means, and the load processing capacity can be controlled. It can be adjusted.
[0020]
Further, with the configuration of the fourth means, the local pressure increasing means can be moved in the direction in which the pressure is to be increased.
[0021]
Further, according to the configuration of the fifth means, it is possible to supply fresh outside air to the double underfloor space by controlling the temperature and humidity without providing a special machine room, and to perform total heat exchange between the fresh outside air and the room air. After that, fresh outside air can be introduced into the room.
[0022]
Moreover, since the conditioned air can be supplied radially into the double underfloor space by the configuration of the sixth means, it is possible to maintain a uniform static pressure at a relatively short distance to every corner of the double underfloor space. It can supply conditioned air.
[0023]
【Example】
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG.
[0024]
As shown in the figure, a double floor panel 2 is disposed above a floor slab 1, and a double underfloor space 3 is formed between the floor slab 1 and the double floor panel 2. An appropriate number of floor outlets 4 are attached to the double floor panel 2, and a ceiling chamber 7 is formed between the ceiling 5 and the ceiling panel 6. The ceiling suction port 8 is provided, and a room 9 space is formed between the double floor panel 2 and the ceiling panel 6. The underfloor air conditioner 11 installed in the air conditioning machine room 10 in the room 9 has an air filter 12, a water heat exchanger 13, and an air supply fan 14 therein. And the lower part is connected to the double underfloor space 3.
[0025]
Next, the configuration of the auxiliary heat source devices 15a, 15b, 15c will be described in detail below. The auxiliary heat source devices 15a, 15b, and 15c are provided in the double underfloor space 3 at each corner of the side where the air conditioner 11 is not installed and away from the air conditioner 11, and the blower fan 16 is provided in the double underfloor space 3. It has a suction port 17 having an opening and a discharge port 18, and the discharge port 18 is connected to a small water heat exchanger 20 via a connection duct 19, and a drain receiver 21 is arranged below the small water heat exchanger 20. It has a configuration. The cold / hot water outlet pipe 23, the cold / hot water return pipe 24, and the drain pipe 25 from the central heat source device 22 are connected to the water heat exchanger 13 of the air conditioner 11 and the small water heat exchangers 20 of the auxiliary heat source devices 15a, 15b, 15c, respectively. It is connected to the.
[0026]
The operation of the above configuration will be described below. The cold water or the hot water generated by the central heat source device 22 is supplied to the water heat exchanger 13 and the small water heat exchanger 20 via the cold / hot water pipe outgoing pipe 23. The conditioned air adjusted to an appropriate temperature by the water heat exchanger 13 inside the air conditioner 11 is supplied into the double underfloor space 3 by the air supply fan 14, and a plurality of floors provided on the double floor panel 2 are provided. The air is blown into the room 9 from the outlet 4, passes through the ceiling chamber 7 from the ceiling inlet 8 provided in the ceiling 5, passes through the air filter 12, and is circulated again to the water heat exchanger 13. In such a situation, the temperature of the conditioned air in the double underfloor space 3 changes due to heat transfer to the floor slab 1, the floor panel 2, and the like as the air moves away from the air conditioner 11. At this time, the auxiliary heat source devices 15a, 15b, and 15c installed in advance in the double underfloor space 3 such as a place where the air-conditioning airflow from the air conditioner 11 is difficult to reach and each corner away from the air conditioner 11 are provided by a blower fan. Since air in the vicinity is sucked in from the suction port 17 of 16 and is blown from the discharge port 18 to the small water heat exchanger 20 through the connection duct 19, the surrounding air is adjusted to an appropriate temperature.
[0027]
As described above, according to the underfloor air-conditioning system of the first embodiment of the present invention, the capacity of the underfloor air conditioner 11 is reduced and downsized, the space for the air-conditioning machine room 10 can be reduced, and the double underfloor space can be reduced. The temperature distribution of No. 3 can be made uniform, and unevenness in the horizontal temperature distribution in the nine living areas of the room can be reduced.
[0028]
In the present embodiment, the heat exchanger is a water heat exchanger using cold and hot water as a heat source. However, even if a heat exchanger for a refrigerant of an air heat source using a heat pump is used, there is no effect on its operation and effect. I won't do it.
[0029]
In the present embodiment, the auxiliary heat source devices 15a, 15b, 15c are arranged at each corner of the double underfloor space 3, but the heat loss occurs in the center of the double underfloor space 3 or in the double underfloor space 3 in advance. It may be provided at a predicted portion.
[0030]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0031]
As shown in the figure, the local booster fan 26 is provided on the opposite side of the blower fan 16 of the auxiliary heat source devices 15a, 15b, 15c with the small water heat exchanger 20 interposed therebetween. The opening facing the water heat exchanger 20 is a suction part 27, the other opening is a blowing part 28, and the blades 29a and 29b are fixed to a shaft 30, and the shaft 30 is directly connected to a motor 31. Have been.
[0032]
The operation of the above configuration will be described below. The local booster fan 26 drives the shaft 30 by the motor 31 to rotate the blades 29 a and 29 b, so that the air whose temperature is adjusted by the small water heat exchanger 20 is sucked from the suction unit 27, and then the blowing unit 28. From above, the double underfloor space 3 is locally pressurized and blown out.
[0033]
As described above, according to the underfloor air-conditioning system of the second embodiment of the present invention, even if a pressure loss occurs due to an obstacle, a change in shape, or the like in the double underfloor space 3, the blowout temperature from each floor blowout port 4 and Variations in air volume can be reduced, and the load processing capacity at each floor outlet 4 can be made constant.
[0034]
In this embodiment, the local pressure increasing means is a propeller type fan having two blades 29a and 29b and a motor 31. However, in the limited space in the double underfloor space 3, Any device may be used as long as it is small and can efficiently increase the pressure. For example, a configuration using a compressed air with a small air compressor may be used.
[0035]
Next, a third embodiment of the present invention will be described with reference to FIGS.
The same portions as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0036]
As shown in the figure, the temperature control fan unit 32 has a small water heat exchanger 20 and a local booster fan 26 integrally attached to the lower part of the double floor panel 2, and has a top surface of the temperature control fan unit 32. , A switch box 33, and a fan speed changeover switch 34 and an auxiliary heat source capacity adjustment switch 35 are provided. The fan speed changeover switch 34 is connected between the fan inverter 36 and the motor 31 via a signal line 37, and the auxiliary heat source capacity adjustment switch 35 is connected via a flow control valve 38 and a signal line 39.
[0037]
The operation of the above configuration will be described below. By operating the fan speed changeover switch 34 provided in the switch box 33, the fan inverter 36 controls the rotation of the motor 31 so that the fan speed is set in advance. By operating the auxiliary heat source capacity adjustment switch 35, the opening of the flow control valve 38 is controlled, so that the load processing capacity of the small water heat exchanger 20 is adjusted.
[0038]
As described above, according to the underfloor air-conditioning system of the third embodiment of the present invention, the fan speed and the capacity of the auxiliary heat source can be adjusted from the room, and the temperature control fan unit 32 is moved by changing the layout when changing the layout. The local booster fan 26 can be relocated.
[0039]
In the present embodiment, the fan inverter 36 is used to adjust the speed of the local booster fan 26. However, the tap for adjusting the speed of the motor 31 is directly connected to the fan speed switch 34 so that the fan speed can be changed. You may.
[0040]
In this embodiment, the flow rate control valve 38 for adjusting the flow rate of the cold and hot water is used as the capacity variable means. However, when a refrigerant heat exchanger using a heat pump is used, the electric expansion valve is used to adjust the capacity. Has no effect on the function and effect.
[0041]
In this embodiment, the switch box 33 serving as the setting means is provided in a wired manner above the temperature control fan unit 32. However, the connection to the signal lines 37 and 39 is made wireless, and the switch is removed as a remote control. , And remote control.
[0042]
In this embodiment, the setting means is mounted on the upper surface of the panel as the switch box 33. However, for example, the setting means may be set by a command from the central monitoring and control device of the air conditioner.
[0043]
In this embodiment, when the local booster fan 26 is used as the local booster, the blower fan 16 and the connection duct 19 may be removed.
[0044]
Next, a fourth embodiment of the present invention will be described with reference to FIGS.
The same parts as those in the first, second and third embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0045]
As shown in the figure, the local booster fan 26 is supported on the double floor panel 2 at two points, a support rotation shaft 40 and a support slide shaft 41, and the support rotation shaft 40 is connected to a large rotating gear 42. The support slide shaft 41 has a roller 44 at an upper portion thereof penetrating the rail groove 43, and is fixed so that the local step-up fan 26 is horizontal and does not drop. The large rotary gear 42 is configured to mesh with a small rotary gear 45, and a handle receiving hole 47 for inserting a rotary handle 46 is provided in the upper center of the small rotary gear 45.
[0046]
The operation of the above configuration will be described below. When the rotating handle 46 is inserted into the handle receiving hole 47 and the rotating handle 46 is rotated, the small rotating gear 45 rotates in the direction in which the rotating handle 46 is rotated, and the meshing large rotating gear 42 is opposite to the small rotating gear 45. Start to rotate in the direction. At this time, the rotation direction of the support rotation shaft 40 and the movement of the roller 44 above the support slide shaft 41 in the rail groove 43 can change the discharge direction of the local booster fan 26. Further, the discharge direction of the local pressure increasing fan 26 can be known at the position of the roller 44 on the rail groove 43.
[0047]
As described above, according to the underfloor air conditioning system of the fourth embodiment of the present invention, the discharge direction of the local booster fan 26 can be set and changed from the upper surface of the temperature control fan unit 32.
[0048]
In the present embodiment, the discharge direction is manually changed using the rotary handle 46 as the discharge direction setting means. However, a method of electrically setting the discharge direction using a driving means such as a motor may be used.
[0049]
Next, a fifth embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first, second, third and fourth embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0050]
As shown in the figure, the total heat exchanger unit 48 is installed inside the space of the ceiling chamber 7, and the outside air introduction duct 49 and the exhaust duct 50 have openings in the outdoor 51 and the ceiling chamber 7, respectively. The communication unit 48 is connected to the communication unit 48. The box type air conditioners 52a, 52b, 52c are installed in the room 9, and have a humidity control unit 54 below the water heat exchanger 13, and the humidity control unit 54 is connected to the double underfloor space 3 so as to communicate therewith. I have.
[0051]
The operation of the above configuration will be described below. Fresh outdoor air outside 51 is totally heat-exchanged with indoor air by a total heat exchanger unit 48, introduced into the ceiling chamber 7 via an external air introduction duct 49, and mixed with indoor air sucked from the ceiling suction port 8. After being guided from the air conditioner suction unit 53 to the box type air conditioners 52a, 52b, and 52c and adjusted to an appropriate humidity by the humidity control unit 54 communicating therewith, the air is guided to the double underfloor space 3. On the other hand, a part of the room air sucked from the ceiling suction port 8 is totally heat-exchanged with fresh outside air by the total heat exchanger unit 48 and then discharged to the outside 51 by the exhaust duct 50.
[0052]
As described above, according to the underfloor air-conditioning system of the fifth embodiment of the present invention, the box-type air conditioners 52a, 52b, and 52c can be installed in the room 9 relatively freely without requiring a machine room. Even in a layout where the interior 9 and the double floor shape are complicated, the space under the double floor can be made uniform in temperature and static pressure, and outside air is introduced using the total heat exchanger unit 48. Can be introduced and energy saving effect can be expected.
[0053]
Next, a sixth embodiment of the present invention will be described with reference to FIG.
The same parts as those in the first, second, third, fourth and fifth embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0054]
As shown in the figure, the columnar air conditioner 55 is installed in the center of the room 9 and has a circular outlet 56 in the double underfloor space 3 and an indoor air inlet 57 in the upper part near the room ceiling. have. The outside air supply duct 58 is connected to the outside air outlet 59 attached to the ceiling panel 6 and the total heat exchanger unit 48.
[0055]
The operation of the above configuration will be described below. Fresh outside air is supplied from the outside 51 through the outside air supply duct 58 to the room 9 from the outside air outlet 59. The indoor air inlet 57 of the columnar air conditioner 55 takes in room air near the ceiling panel 6 of the room 9 and fresh outside air, and the circular outlet 56 provided in the double underfloor space 3 radiates conditioned air radially. It will be diffused and blown out.
[0056]
As described above, according to the underfloor air-conditioning system of the sixth embodiment of the present invention, even when the indoor layout and the double-floor shape are complicated, the air-conditioner is installed near the center of the room, so that the space under the double-floor space is reduced. The static pressure and temperature distribution can be made uniform.
[0057]
In the present embodiment, the outlet of the columnar air conditioner 55 is a circular outlet, but a square outlet in consideration of the diffusivity of the air flow may be used.
[0058]
【The invention's effect】
As is clear from the above embodiments, according to the present invention, the capacity of the underfloor air conditioner is reduced and downsized, the machine room space can be reduced, and the temperature distribution in the double underfloor space is made uniform. Thus, an underfloor air-conditioning system can be provided which has an effect of reducing unevenness in temperature distribution in a horizontal direction in an indoor living area.
[0059]
In addition, it is possible to reduce the variation in the blowing temperature and the air volume from each floor outlet, and to make the load processing capacity at each floor outlet constant.
[0060]
Further, the boosting force and the load processing capacity of the auxiliary heat source can be adjusted from the indoor side, and the auxiliary heat source and the local pressure increasing means can be relocated when the layout is changed.
[0061]
Further, the pressure increasing direction of the local pressure increasing means can be set from the room.
In addition, fresh air can be introduced without particularly requiring an air-conditioning machine room and expecting an energy saving effect.
[0062]
Furthermore, even when the indoor layout and the double floor shape are complicated, the static pressure and the temperature distribution in the space under the double floor can be made uniform by setting the air conditioner installation location near the center of the room.
[Brief description of the drawings]
1 is a sectional view of a main part of an underfloor air-conditioning system according to a first embodiment of the present invention; FIG. 2 is a plan view of the underfloor air-conditioning system; FIG. FIG. 4 is a sectional view of a main part of an underfloor air conditioning system according to a second embodiment of the present invention. FIG. 5 is a plan view of a main part of the underfloor air conditioning system. FIG. 6 is an underfloor of a third embodiment of the present invention. FIG. 7 is a plan view of a main part of the air conditioning system. FIG. 7 is a perspective view of a main part of the temperature control fan unit of the underfloor air conditioning system. FIG. FIG. 9 is a plan view of an essential part of a temperature control fan unit of the underfloor air conditioning system. FIG. 10 is a sectional view of an essential part of an underfloor air conditioning system according to a fifth embodiment of the present invention. Cross sectional view of the underfloor air conditioning system of the sixth embodiment of the fragmentary plan view of a floor air-conditioning system 12 of the present invention Description of Reference Numerals]
DESCRIPTION OF SYMBOLS 1 Floor slab 2 Double floor panel 3 Double underfloor space 4 Floor outlet 11 Air conditioner 15a Auxiliary heat source device 15b Auxiliary heat source device 15c Auxiliary heat source device 16 Blower fan 20 Small water heat exchanger 26 Local booster fan 32 Temperature control fan unit 33 Switch Box 34 Fan Speed Switch 35 Auxiliary Heat Source Capability Switch 36 Fan Inverter 38 Flow Control Valve 40 Support Rotary Shaft 41 Support Slide Shaft 42 Large Rotating Gear 43 Rail Groove 44 Roller 45 Small Rotating Gear 46 Rotating Handle 47 Handle Receiving Hole 48 Total heat exchanger unit 49 Outside air introduction duct 50 Exhaust duct 52a Box type air conditioner 52b Box type air conditioner 52c Box type air conditioner 54 Humidity control unit 55 Column type air conditioner 56 Circular outlet 57 Indoor air intake 58 Outside air supply duct 59 Outside air outlet

Claims (6)

A double underfloor space configured on a floor slab using double floor panels is used as a chamber for supplying air-conditioned air from an air conditioner. in floor air-conditioning system, the double at least one location in the underfloor space at the corner of the side where the air conditioner is not installed, is integrally composed of a blower fan that communicates with the heat exchanger and the heat exchanger the double floor underfloor air conditioning system comprising an auxiliary heat source apparatus you as a uniform temperature distribution in the space. The underfloor air-conditioning system according to claim 1, further comprising a local pressure increasing means for locally increasing the pressure in the double underfloor space on the discharge side of the blower fan of the auxiliary heat source device. A temperature control fan unit in which a heat exchanger and a local booster are integrated into a double floor panel, a capacity changing means capable of changing a load processing capacity of the heat exchanger, and a booster of the local booster are changed. The underfloor air-conditioning system according to claim 1 or 2, further comprising: a boosting force changing unit that can perform the boosting force and a setting unit that can set a boosting force and a load processing capacity on the upper surface of the temperature control unit and on the indoor side. 3. A temperature control fan unit comprising: a direction changing unit that can change a pressure increasing direction by changing an angle of a local pressure increasing unit; and a direction setting unit that sets a pressure increasing direction of the local pressure increasing unit. Or the underfloor air conditioning system according to 3. The underfloor air-conditioning system according to claim 1, 2, 3, or 4, further comprising a humidity control unit for controlling the humidity of the air discharged from the box type air conditioner that draws air from the ceiling chamber. An outside air outlet for supplying fresh outside air into the room, an indoor air inlet arranged in a columnar shape in the living room space, and an opening at an upper part near the indoor ceiling, and a radiated conditioned air in the double floor. The underfloor air-conditioning system according to claim 1, further comprising a columnar air conditioner having a circular outlet for blowing air.

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