JP7350504B2 - air conditioning system - Google Patents

Description

The present invention relates to an air conditioning system that air-conditions a space to be air-conditioned.

For example, when a conference room, an office, etc. is the air-conditioned space, even if you start air-conditioning the air-conditioned space from the time you start using the air-conditioned space, it will take until the air-conditioning state of the air-conditioned space reaches the desired air-conditioning state. it takes time.

Therefore, conventionally, the number of people in each room was estimated from the schedule information of each employee, and a set temperature suitable for the estimated number of people in the room was determined. There are some systems that perform air conditioning control before the start of use of the air-conditioned space (for example, see Patent Document 1). As a result, the temperature of the air-conditioned space can be adjusted to the set temperature from the start of use of the air-conditioned space, thereby improving user comfort.

JP2013-89208A

However, when determining the set temperature, the number of people in the room is estimated, but the actual number of people using the air-conditioned space may differ from the estimated number of people in the room. For example, if the actual number of users of the air-conditioned space is smaller than the estimated number of people in the room, the latent heat load of the air-conditioned space will be smaller than estimated. Therefore, the latent heat load is processed excessively, and the relative humidity of the air-conditioned space decreases, resulting in excessive cooling.

In this way, by performing air conditioning control in advance before the start of use, the user's comfort can be improved, but if the air conditioning control is continued after the start of use, the latent heat load may not be properly handled.

In view of this situation, the main problem of the present invention is to perform air conditioning before the use of the air-conditioned space begins to improve the comfort of the users, while also controlling the latent heat load without excess or deficiency even after the use of the air-conditioned space begins. The object of the present invention is to provide an air conditioning system that can perform appropriate processing to improve user comfort.

A first characteristic configuration of the present invention includes a supply air temperature adjustment section that adjusts the supply air temperature of air supplied to the air-conditioned space;
an air volume adjustment unit that adjusts the amount of air temperature-controlled by the supply air temperature adjustment unit supplied to the air-conditioned space;
An air conditioning control unit that controls the operating state of the supply air temperature adjusting unit and the operating state of the air volume adjusting unit,
Before the start of use of the air-conditioned space, the air-conditioning control unit estimates a latent heat load from the expected number of users of the air-conditioned space, and the supply air temperature of the air supplied to the air-conditioned space corresponds to the estimated latent heat load. An estimated load that controls the operating state of the supply air temperature adjustment unit so that the target supply air temperature for the estimated load is reached, and controls the operating state of the air volume adjustment unit according to the load state of the air-conditioned space. air conditioning control,
After the use of the air-conditioned space starts, if the latent heat load in the air-conditioned space is the normal latent heat load that is normally expected, the air conditioning control unit determines that the supply air temperature of the air supplied to the air-conditioned space is the normal latent heat load. The operation state of the supply air temperature adjustment section is controlled so that the normal target supply air temperature corresponds to the normal target supply air temperature, and the operation state of the air volume adjustment section is controlled according to the load state of the air-conditioned space. Performs normal air conditioning control,
After the use of the air-conditioned space starts, if the latent heat load in the air-conditioned space is a partial latent heat load that is smaller than the normal latent heat load, the air-conditioning control unit adjusts the supply air temperature of the air supplied to the air-conditioned space. The operation state of the supply air temperature adjustment section is controlled so that the supply air temperature becomes a target supply air temperature for partial load corresponding to the partial latent heat load, and the operation state of the air volume adjustment section is controlled according to the load state of the air-conditioned space. configured to perform part-load air conditioning control to control conditions ;
In the estimated load air conditioning control, a target supply air temperature for the estimated load is determined using a sensible heat ratio according to the estimated latent heat load,
In the normal air conditioning control, a target supply air temperature for normal use is determined using a sensible heat ratio according to the normal latent heat load,
The partial load air conditioning control includes a target supply air temperature calculation unit that calculates a target supply air temperature for the partial load using a sensible heat ratio according to the partial latent heat load,
The estimation relationship between the sensible heat ratio according to the estimated latent heat load and the target supply air temperature for the estimated load is set in advance,
The target supply air temperature calculation section
In the estimated load air conditioning control, a target supply air temperature for the estimated load is determined based on a sensible heat ratio according to the estimated latent heat load using a preset estimation relationship,
In the above-mentioned normal air conditioning control, regarding the relationship between absolute humidity and dry bulb temperature, a state change relationship indicating a state change due to temperature control processing by the temperature control unit from the indoor state point of the air-conditioned space, and a state change relation indicating the state change due to temperature control processing by the temperature control unit, and from the indoor state point of the air-conditioned space Compare the sensible heat ratio correspondence relationship for normal latent heat load that corresponds to the sensible heat ratio for normal latent heat load, and determine the dry bulb temperature at which the relationships match as the target supply air temperature for normal use,
In the above-mentioned partial load air conditioning control, regarding the relationship between absolute humidity and dry bulb temperature, a state change relationship indicating a state change due to temperature control processing by the temperature control unit from the indoor state point of the air-conditioned space, and an indoor state of the air-conditioned space are determined. From the point, the sensible heat ratio correspondence relationship for partial latent heat load corresponding to the sensible heat ratio for partial latent heat load is compared, and the dry bulb temperature at which the relationships match is determined as the target supply air temperature for partial load. At the point.

According to this configuration, before the start of use of the air-conditioned space, the air-conditioning control unit performs estimated load air-conditioning control, so while adjusting the supply amount to the air-conditioned space according to the load state of the air-conditioned space, It is possible to supply air at the target supply air temperature for the estimated load. Therefore, at the start of use, the air-conditioned space can be brought into an appropriately air-conditioned state, so that user comfort can be improved from the start of use.

Furthermore, after the start of use, the air conditioning control section selects whether to perform normal air conditioning control or partial load air conditioning control depending on what kind of latent heat load is in the air conditioned space. As a result, after the start of use, whether the latent heat load of the air-conditioned space is a normal latent heat load (for example, maximum latent heat load) or a partial latent heat load, air conditioning control can be performed according to the latent heat load. Therefore, even after the start of use, the latent heat load can be appropriately processed without excess or deficiency, and user comfort can be improved.

Further, according to this configuration, the target supply air temperature calculation unit calculates the sensible heat ratio according to the latent heat load of the air-conditioned space in each of the estimated load air conditioning control, normal air conditioning control, and partial load air conditioning control. can be used to determine an appropriate target supply air temperature. As a result, air with an appropriate target supply air temperature can be supplied to the air-conditioned space in each of the estimated load air conditioning control, normal air conditioning control, and partial load air conditioning control, and the latent heat load can be adjusted appropriately. can be processed.

Diagram showing the overall outline of the air conditioning system Humidity diagram showing state points when determining target supply air temperature for estimated load Humidity diagram showing the state points when determining the target supply air temperature for normal use Humidity diagram showing state points when determining target supply air temperature for part load Flowchart showing the operation of the air conditioning control unit

Embodiments of an air conditioning system according to the present invention will be described based on the drawings.
As shown in Fig. 1, this air conditioning system includes an air conditioner 2 (corresponding to a supply air temperature adjustment section) that adjusts the supply air temperature of air supplied to an air conditioned space 1, and a temperature control unit that uses the air conditioner 2. A variable air volume unit 3 that adjusts the supply amount of conditioned air SA (supply air) to the air conditioned space 1, and an air conditioner that controls the operation of the air conditioning system by controlling the operating state of the air conditioner 2 and variable air volume unit 3. A control section 4 is also provided.

The air conditioning system has an air supply path 5 that serves as a flow path for air to flow through, and supplies conditioned air SA whose temperature has been adjusted by an air conditioner 2 to an air-conditioned space 1, and a return air RA from the air-conditioned space 1. A return air passage 6 for returning air to the air conditioner 2 and an outside air introduction passage 7 for supplying outside air OA to the air conditioner 2 are provided.

The air supply path 5 has an upstream end connected to the air conditioner 2, and a downstream portion branched into a first branch air supply path 5a and a second branch air supply path 5b. A variable air volume unit 3 is arranged in each of the first branch air supply path 5a and the second branch air supply path 5b. The number of flow paths into which the downstream portion of the air supply path 5 is branched can be changed as appropriate. For example, the number of flow paths can be changed depending on the size of the air-conditioned space 1.

The return air passage 6 is open to the ceiling space 8 of the air-conditioned space 1 and is configured to supply return air RA from the air-conditioned space 1 to the air conditioner 2 through the ceiling space 8. In addition to the return air path 6, an outside air introduction path 7 is connected to the air conditioner 2, and outside air OA can be supplied to the air conditioner 2 through the outside air introduction path 7.

The air conditioner 2 is arranged, for example, in a space adjacent to the air-conditioned space 1. The air conditioner 2 includes an air conditioning fan 21 and a temperature control section 22 that controls the temperature of air supplied by the operation of the air conditioning fan 21. By operating the air conditioning fan 21, return air RA is supplied to the air conditioner 2 through the return air passage 6, and outside air OA is supplied through the outside air introduction passage 7. However, the present invention is not limited to this, and only the return air RA may be supplied to the air conditioner 2 through the return air path 6 without introducing the outside air OA through the outside air introduction path 7.

The temperature control unit 22 is configured to control the temperature of a mixture of return air RA and outside air OA (or only return air RA). The temperature control unit 22 is configured with a cold/hot water coil that exchanges heat between a heat medium (for example, cold water or hot water) that is circulated and supplied from a heat source device (not shown) and supplied air, and performs cooling processing on the supplied air. Or heat treated. Incidentally, the temperature control section 22 can also be configured with a cooling coil that cools the supplied air.

The air conditioning control section 4 controls the temperature control section 22 by controlling the amount of heat medium supplied to the temperature control section 22 . The air conditioning control unit 4 controls the operating status of the air conditioner 2 by controlling the operating status of the air conditioning fan 21 and controlling the temperature adjusting unit 22 so that the temperature of the conditioned air SA becomes the target supply air temperature. are doing.

The variable air volume unit 3 includes, for example, a damper that can freely adjust the flow area of the air supply path 5, and by adjusting the flow area of the air supply path 5, the conditioned air SA is directed to the air-conditioned space 1. The air supply volume can be adjusted freely. The air conditioning control unit 4 controls the air flow rate of the conditioned air SA to the air conditioned space 1 based on the air conditioning state (load state) of the air conditioned space 1 so that the indoor temperature of the air conditioned space 1 reaches the set temperature. It is controlled by a variable air volume unit 3. Here, the indoor temperature of the air-conditioned space 1 can be the temperature detected by the temperature sensor T arranged in the air-conditioned space 1, and the set temperature can be the temperature set by the user's remote control operation etc. can.

In addition to the variable air volume unit 3, the air conditioning control unit 4 controls the operating state of the air conditioning fan 21 to direct the conditioned air SA to the air conditioned space 1 so that the indoor temperature of the air conditioned space 1 reaches the set temperature. The supply air volume is adjusted. The variable air volume unit 3 sets a target opening degree of the damper so that the indoor temperature of the air-conditioned space 1 reaches a set temperature, and controls the opening degree of the damper to the set target opening degree. The air conditioning control unit 4 acquires information regarding the target opening degree set in the variable air volume unit 3 through communication or the like, and determines the required air volume in the variable air volume unit 3 based on the target opening degree. The air conditioning control unit 4 determines the required air volume for each of the plurality of variable air volume units 3, and controls the rotational speed of the air conditioning fan 21 so that the total air volume of these required air volumes is supplied from the air conditioner 2. . In this way, the air conditioning control unit 4 controls the operating state of the variable air volume unit 3 and the air conditioning fan 21, thereby controlling the air flow rate of the conditioned air SA to the air conditioned space 1. The indoor temperature is kept at a set temperature, and the variable air volume unit 3 and air conditioning fan 21 correspond to an air volume adjustment section.

When the air conditioning control unit 4 controls the rotational speed of the air conditioning fan 21, if the target opening degree of the variable air volume unit 3 is within the low opening side range, the air conditioning control unit 4 controls the rotational speed of the air conditioning fan 21 to a low rotational speed. Decreasing side correction is performed to reduce the speed by a predetermined correction amount. In this case, if there is even one variable air volume unit 3 whose target opening degree is on the high opening side, the air conditioning control section 4 does not perform the lowering side correction. Further, when the target opening degree of the variable air volume unit 3 is within the high opening degree range, the air conditioning control unit 4 performs an increasing correction to increase the rotational speed of the air conditioning fan 21 toward the high rotational speed side by a predetermined correction amount. Is going. In this way, even if the target opening degree of the variable air volume unit 3 is outside the predetermined range, the air conditioning control unit 4 can control the rotational speed of the air conditioning fan 21 while performing the downward correction or the upward correction. , the amount of air supplied to the air-conditioned space 1 of the conditioned air SA can be appropriately controlled.

The air conditioning control unit 4 includes a latent heat load estimating unit 9 that estimates the latent heat load from the expected number of users of the air-conditioned space 1. The latent heat load estimating unit 9 is linked via a communication device or the like to a scheduler system 30 that manages the reservation status, the usage status of the air-conditioned space 1, the usage time period of the air-conditioned space 1, the number of users, etc.

The latent heat load estimating unit 9, in cooperation with the scheduler system 30, knows the start time of use of the air-conditioned space 1, the expected number of users, and the like. The relationship between the number of users of the air-conditioned space 1 and the magnitude of the latent heat load is set in advance through experiments, etc., and the latent heat load estimation unit 9 calculates the relationship between the number of users of the air-conditioned space 1 and the magnitude of the latent heat load, which is set in advance. The magnitude of the latent heat load in the air-conditioned space 1 is estimated using the relationship and information from the scheduler system 30.

In this way, since the latent heat load estimating unit 9 estimates the latent heat load before starting to use the air-conditioned space 1, the air-conditioning control unit 4 estimates the latent heat load estimating unit 9 before starting to use the air-conditioning space 1 Estimated load air conditioning control can be performed using the estimated latent heat load estimated in .

In the estimated load air conditioning control, the air conditioning control unit 4 adjusts the supply air temperature of the air supplied to the air-conditioned space 1 to the target supply air temperature for the estimated load corresponding to the estimated latent heat load estimated by the latent heat load estimation unit 9. The operating state of the air conditioner 2 is controlled so that the operating state of the variable air volume unit 3 and the air conditioning fan 21 of the air conditioner 2 is controlled according to the load state of the space 1 to be air conditioned.

In order to perform estimated load air conditioning control, the air conditioning control section 4 is equipped with a target supply air temperature calculation section 10 that calculates a target supply air temperature for the estimated load. The target supply air temperature calculation unit 10 calculates the target supply air temperature for the estimated load using the sensible heat ratio according to the estimated latent heat load.

How to determine the target supply air temperature for the estimated load will be explained based on FIG. 2, which is a psychrometric diagram. In Figure 2, the vertical axis is absolute humidity (kg/kg (DA)), the horizontal axis is dry bulb temperature (℃), and the sensible heat ratio K1 (=sensible heat/(sensible heat + latent heat)) and the saturation curve H etc. Although FIG. 2 shows the case where the air-conditioned space 1 is cooled, the target supply air temperature for the estimated load can be similarly determined when the air-conditioned space 1 is heated.

In FIG. 2, the indoor state point in summer is designated as A1, and the outside air state point is designated as A2. In this embodiment, since return air RA and outside air OA are mixed, the state point of this mixture is set to A3. Since the air-fuel mixture is cooled by the cooling process performed by the temperature control section 22, a solid line B indicates a change in the state of the air-fuel mixture at the temperature control section 22.

Assuming that the latent heat load in the air-conditioned space 1 is the estimated latent heat load, the slope of the sensible heat ratio at that time is K1, as shown on the left side of FIG. Therefore, the target supply air temperature calculation unit 10 sets a dotted line D1 having the same slope as the sensible heat ratio K1 to pass through the indoor state point A1, finds the intersection E1 of the dotted line D1 and the solid line B, and calculates the intersection E1. The dry bulb temperature F1 corresponding to the above is determined as the target supply air temperature for the estimated load. In this way, the target supply air temperature calculation unit 10 calculates the target supply air temperature for the estimated load based on the sensible heat ratio according to the estimated latent heat load.

In this way, the target supply air temperature calculation section 10 calculates the estimated load temperature in the estimated load air conditioning control using the psychrometric diagram shown in FIG. Although the target supply air temperature is determined, how the target supply air temperature for the estimated load is determined can be changed as appropriate.

For example, similar to the target supply air temperature for normal use, which will be described later, the target supply air temperature for the estimated load is determined by taking into account not only the change in state due to the cooling process by the temperature controller 22, but also the change in state due to heat generated by the air conditioning fan 21, etc. You can also find the air temperature.

Further, the relationship between the sensible heat ratio and the target supply air temperature for the estimated latent heat load is set in advance through experiments or the like, and the target supply air temperature calculation unit 10 calculates the preset relationship between the sensible heat ratio and the target supply air temperature according to the estimated latent heat load. Using this, the target supply air temperature for the estimated load can be determined.

The air conditioning control unit 4 is configured to be able to perform normal air conditioning control and partial load air conditioning control after the start of use of the air conditioned space 1, in addition to the estimated load air conditioning control before the use of the air conditioned space 1 starts. has been done. In the normal air conditioning control, the air conditioning control unit 4 controls the operating state of the air conditioner 2 so that the supply air temperature of the air supplied to the air conditioned space 1 becomes the normal target supply air temperature corresponding to the normal latent heat load. In addition, the operating state of the variable air volume unit 3 and the air conditioning fan 21 of the air conditioner 2 is controlled according to the load state of the space 1 to be air conditioned. In partial load air conditioning control, the air conditioning control unit 4 operates the air conditioner 2 so that the supply air temperature of the air supplied to the air conditioned space 1 becomes the partial load target supply air temperature corresponding to the partial latent heat load. The operating state of the variable air volume unit 3 and the air conditioning fan 21 of the air conditioner 2 is controlled according to the load state of the air conditioned space 1.

The target supply air temperature calculation unit 10 calculates not only the target supply air temperature for the estimated load, but also the target supply air temperature for normal use in normal air conditioning control and the target supply air temperature for partial load in partial load air conditioning control. I'm looking for it. The target supply air temperature calculation unit 10 calculates the target supply air temperature for normal use using the sensible heat ratio according to the normal latent heat load, and calculates the target supply air temperature for normal use using the sensible heat ratio according to the partial latent heat load. The supply air temperature is being determined.

The air-conditioned space 1 is assumed to be, for example, a conference room or an office that can be used by a large number of people, and the latent heat load when the air-conditioned space 1 is used by the maximum number of people is the normal latent heat load. The maximum latent heat load of space 1 is the normal latent heat load. Therefore, the partial latent heat load is smaller than the maximum latent heat load.

How to determine the target supply air temperature for normal use will be explained based on FIG. 3, which is a psychrometric diagram. In Figure 3, the vertical axis is absolute humidity (kg/kg (DA)), the horizontal axis is dry bulb temperature (℃), and the sensible heat ratio K2 (=sensible heat/(sensible heat + latent heat)) and the saturation curve H etc. Although FIG. 3 shows the case where the air-conditioned space 1 is cooled, the normal target supply air temperature can be similarly determined when the air-conditioned space 1 is heated.

In FIG. 3, the indoor state point in summer is designated as A1, and the outside air state point is designated as A2. In this embodiment, since return air RA and outside air OA are mixed, the state point of this mixture is set to A3. Since the air-fuel mixture is cooled by the cooling process performed by the temperature control section 22, a solid line B indicates a change in the state of the air-fuel mixture at the temperature control section 22. Further, since the air-fuel mixture is heated by heat generated by the air conditioning fan 21 and the like, a solid line C indicates a state change due to this heating. As a result, the conditioned air SA supplied from the air conditioner 2 changes state from A3 to A4 along the solid line B, and reaches a state point where the state changes along the solid line C.

Assuming that the latent heat load in the air-conditioned space 1 is a normal latent heat load (maximum latent heat load), the slope of the sensible heat ratio at that time is K2, as shown on the left side of FIG. Therefore, the target supply air temperature calculation unit 10 sets a dotted line D2 having the same slope as the sensible heat ratio K2 to pass through the indoor state point A1, finds the intersection E2 of the dotted line D2 and the solid line C, and calculates the intersection E2. The dry bulb temperature F2 corresponding to the above is determined as the normal target supply air temperature. In this way, the target supply air temperature calculation unit 10 calculates the target supply air temperature for normal use based on the sensible heat ratio according to the normal latent heat load.

In this way, the target supply air temperature calculation section 10 uses the psychrometric diagram shown in FIG. Thus, the target supply air temperature for normal use in normal air conditioning control is determined, but how the target supply air temperature for normal use is determined can be changed as appropriate.

For example, the relationship between the sensible heat ratio and the target supply air temperature for normal use is set in advance through experiments, etc., and the target supply air temperature calculation section 10 calculates the relationship between the sensible heat ratio and the normal target supply air temperature according to the normal latent heat load. Using this, the target supply air temperature for normal use can be determined.

In addition, in FIG. 3, in addition to the state change due to the cooling process by the temperature control unit 22, state changes due to heat generation of the air conditioning fan 21 etc. are taken into consideration. It is also possible to determine the target supply air temperature for normal use, taking only the state change due to the cooling process by the temperature controller 22 into consideration.

How to determine the target supply air temperature for partial load will be explained based on FIG. 4, which is a psychrometric diagram. In Figure 4, the vertical axis is absolute humidity (kg/kg (DA)), the horizontal axis is dry bulb temperature (℃), and the sensible heat ratio K3 (=sensible heat/(sensible heat + latent heat)) and the saturation curve H etc. Although FIG. 4 shows the case where the air-conditioned space 1 is cooled, the normal target supply air temperature can be similarly determined when the air-conditioned space 1 is heated.

In FIG. 4, the indoor state point in summer is designated as A1, and the outside air state point is designated as A2. In this embodiment, since return air RA and outside air OA are mixed, the state point of this mixture is set to A3. Since the air-fuel mixture is cooled by the cooling process performed by the temperature control section 22, a solid line B indicates a change in the state of the air-fuel mixture at the temperature control section 22.

Assuming that the latent heat load in the air-conditioned space 1 is a partial latent heat load, the slope of the sensible heat ratio at that time is K3, as shown on the left side of FIG. Therefore, the target supply air temperature calculation unit 10 sets a dotted line D3 having the same slope as the sensible heat ratio K3 to pass through the indoor state point A1, finds the intersection E3 of the dotted line D3 and the solid line B, and calculates the intersection E3. The dry bulb temperature F3 corresponding to the above is determined as the target supply air temperature for partial load. In this way, the target supply air temperature calculation unit 10 calculates the target supply air temperature for partial load based on the sensible heat ratio according to the partial latent heat load.

In this way, the target supply air temperature calculation section 10 calculates the partial load in the partial load air conditioning control using the psychrometric diagram as shown in FIG. Although the target supply air temperature for the partial load is determined, the method for determining the target supply air temperature for the partial load can be changed as appropriate.

For example, in the same way as the target supply air temperature for normal use, the target supply air temperature for partial load is You can also ask for

In addition, the relationship between the sensible heat ratio and the target supply air temperature for partial loads is set in advance through experiments, etc., and the target supply air temperature calculation unit 10 calculates the relationship between the sensible heat ratio and the target supply air temperature according to the partial latent heat load. Using this, the target supply air temperature for partial load can be determined.

In this case, for example, the relationship between the magnitude of the partial latent heat load and the target supply air temperature for the partial load can be set in advance through experiments or the like. Therefore, the target supply air temperature calculation unit 10 calculates the target supply air temperature for the partial load using the magnitude of the partial latent heat load and the relationship between the magnitude of the partial latent heat load set in advance and the target supply air temperature for the partial load. You can find the air temperature.

As for the relationship between the preset latent heat load size and the target supply air temperature for partial load, for example, if the indoor humidity is 10% lower than the set humidity, the target supply air temperature for normal use will be changed by 1°C. The increased temperature is set as the target supply air temperature for partial load, and if the indoor temperature is 20% lower than the set humidity, the target supply air temperature for normal use is increased by 2°C to the target supply air temperature for partial load. The relationship can be set to the target supply air temperature. In this way, if the range of decrease in indoor humidity relative to the set humidity is X%, it is possible to establish a relationship in which the target supply air temperature for partial load is set by increasing the target supply air temperature for normal use by Y°C. X% and Y° C. can be changed and set according to various conditions such as the situation of the air-conditioned space 1.

The operation of the air conditioning control section 4 will be explained based on the flowchart of FIG. 5.
The air conditioning control unit 4 starts the estimated load air conditioning control based on the deviation of the temperature and humidity detected by the temperature sensor T and the humidity sensor S with respect to the set temperature and set humidity set by a remote controller, etc. It is possible to know how long it takes for the temperature and humidity of the air-conditioned space 1 to reach the set temperature and humidity.

On the other hand, the latent heat load estimating unit 9, in cooperation with the scheduler system 30, knows not only the number of scheduled users of the air-conditioned space 1 but also the usage start time and the like. Therefore, the air conditioning control unit 4 knows the start timing at which the estimated load air conditioning control should be started in order to obtain the air conditioning state of the set temperature and set humidity from the beginning of use of the air conditioned space 1. .

Therefore, the air conditioning control unit 4 performs the estimated load air conditioning control when the estimated load air conditioning control should start (step #2 if Yes in step #1). Thereafter, when the time to start using the air-conditioned space 1 arrives, the latent heat load estimation unit 9 determines the magnitude of the latent heat load at the time when the use of the air-conditioned space 1 starts (step #3 If Yes, step #4). The latent heat load estimating unit 9 determines the magnitude of the latent heat load based on the detection information of the humidity sensor S, for example. Considering the normal latent heat load, set a normal latent heat range that is higher than the lowest value based on the set humidity, and if the detected humidity of the humidity sensor S is within the normal latent heat range, the latent heat load is determined to be the normal latent heat load. can. If the detected humidity of the humidity sensor S is a value lower than the normal latent heat range, it can be determined that the latent heat load is a partial latent heat load.

When the latent heat load estimating unit 9 determines that the latent heat load is a normal latent heat load, the air conditioning control unit 4 performs normal air conditioning control (in the case of the normal latent heat load in step #4, step #5). When the latent heat load estimating unit 9 determines that the latent heat load is a partial latent heat load, the air conditioning control unit 4 performs partial load air conditioning control (in the case of the partial latent heat load in step #4, step #6).

In this way, before the use of the air-conditioned space 1 starts, the air-conditioning control unit 4 performs the estimated load air-conditioning control, so the amount of supply to the air-conditioned space 1 is adjusted according to the load state of the air-conditioned space 1. At the same time, it is possible to supply air at the target supply air temperature for the estimated load. Therefore, since the air-conditioned space 1 can be controlled to a desired air-conditioning state at the start of use, the user's comfort can be improved from the start of use.

Moreover, after the start of use, the air conditioning control unit 4 selects whether to perform normal air conditioning control or partial load air conditioning control depending on what kind of latent heat load is in the air conditioned space 1. There is. As a result, after the start of use, whether the latent heat load of the air-conditioned space 1 is a normal latent heat load (for example, maximum latent heat load) or a partial latent heat load, air conditioning control can be performed according to the latent heat load. Therefore, even after the start of use, the latent heat load can be appropriately processed without excess or deficiency, and user comfort can be improved.

[Another embodiment]
(1) In the embodiment described above, the latent heat load estimating unit 9 determines the magnitude of the latent heat load at the time of starting use of the air-conditioned space 1 based on the detection information of the humidity sensor S. However, for example, the magnitude of the latent heat load can also be determined based on the actual number of users of the air-conditioned space 1. The number of users of the air-conditioned space 1 can be ascertained by providing a device for identifying the number of users, such as a camera or a human sensor that captures an image of the air-conditioned space 1 . If the number of users ascertained by the number of users identification device is equal to or greater than the set number of people based on the maximum number of users of the air-conditioned space 1, it is determined that there is a normal latent heat load, and if the number of users is less than the set number of people, It can be determined that the load is a partial latent heat load.

(2) In the above embodiment, the air conditioning control unit 4 can freely adjust the amount of air supplied from the air conditioner 2 to the air conditioned space 1 by controlling the rotational speed of the air conditioning fan 21. Although an example has been shown in which the air volume adjustment unit that adjusts the amount of air supplied to the air conditioner is configured from the variable air volume unit 3 and the air conditioning fan 21, regarding the configuration for adjusting the amount of air supplied to the air conditioned space 1. can be changed as appropriate.

For example, in the above embodiment, the air conditioning control unit 4 can adjust the amount of air supplied to the air-conditioned space 1 by controlling the rotation speed of the air conditioning fan 21, so the variable air volume unit 3 is omitted. You can also do that. In this case, the air volume adjustment section can be configured by the air conditioning fan 21.

Further, unlike the above embodiment, the air conditioning control unit 4 maintains the rotational speed of the air conditioning fan 21 at a constant rotational speed, so that the amount of air supplied from the air conditioner 2 to the air-conditioned space 1 is set as a constant amount. You can leave it there. In this case, since the amount of air supplied to the air-conditioned space 1 can be adjusted by the variable air volume unit 3, the air volume adjustment section can be configured by the variable air volume unit 3.

1 Air conditioned space 2 Air conditioner (supply air temperature adjustment section)
3 Variable air volume unit (air volume adjustment section)
4 Air conditioning control section 9 Latent heat load estimation section 10 Target supply air temperature calculation section 21 Air conditioning fan (air volume adjustment section)

Claims (1)

a supply air temperature adjustment unit that adjusts the supply air temperature of the air supplied to the air-conditioned space;
an air volume adjustment unit that adjusts the amount of air temperature-controlled by the supply air temperature adjustment unit supplied to the air-conditioned space;
An air conditioning control unit that controls the operating state of the supply air temperature adjusting unit and the operating state of the air volume adjusting unit,
Before the start of use of the air-conditioned space, the air-conditioning control unit estimates a latent heat load from the expected number of users of the air-conditioned space, and the supply air temperature of the air supplied to the air-conditioned space corresponds to the estimated latent heat load. An estimated load that controls the operating state of the supply air temperature adjustment unit so that the target supply air temperature for the estimated load is reached, and controls the operating state of the air volume adjustment unit according to the load state of the air-conditioned space. air conditioning control,
After the use of the air-conditioned space starts, if the latent heat load in the air-conditioned space is the normal latent heat load that is normally expected, the air conditioning control unit determines that the supply air temperature of the air supplied to the air-conditioned space is the normal latent heat load. The operation state of the supply air temperature adjustment section is controlled so that the normal target supply air temperature corresponds to the normal target supply air temperature, and the operation state of the air volume adjustment section is controlled according to the load state of the air-conditioned space. Performs normal air conditioning control,
After the use of the air-conditioned space starts, if the latent heat load in the air-conditioned space is a partial latent heat load that is smaller than the normal latent heat load, the air-conditioning control unit adjusts the supply air temperature of the air supplied to the air-conditioned space. The operation state of the supply air temperature adjustment section is controlled so that the supply air temperature becomes a target supply air temperature for partial load corresponding to the partial latent heat load, and the operation state of the air volume adjustment section is controlled according to the load state of the air-conditioned space. configured to perform part-load air conditioning control to control conditions ;
In the estimated load air conditioning control, a target supply air temperature for the estimated load is determined using a sensible heat ratio according to the estimated latent heat load,
In the normal air conditioning control, a target supply air temperature for normal use is determined using a sensible heat ratio according to the normal latent heat load,
The partial load air conditioning control includes a target supply air temperature calculation unit that calculates a target supply air temperature for the partial load using a sensible heat ratio according to the partial latent heat load,
The estimation relationship between the sensible heat ratio according to the estimated latent heat load and the target supply air temperature for the estimated load is set in advance,
The target supply air temperature calculation section
In the estimated load air conditioning control, a target supply air temperature for the estimated load is determined based on a sensible heat ratio according to the estimated latent heat load using a preset estimation relationship,
In the above-mentioned normal air conditioning control, regarding the relationship between absolute humidity and dry bulb temperature, a state change relationship indicating a change in state due to temperature control processing by the temperature control unit from the indoor state point of the air-conditioned space, and a state change relation indicating the state change due to temperature control processing by the temperature control unit, and from the indoor state point of the air-conditioned space Compare the sensible heat ratio correspondence relationship for normal latent heat load that corresponds to the sensible heat ratio for normal latent heat load, and determine the dry bulb temperature at which the relationships match as the target supply air temperature for normal use,
In the above-mentioned partial load air conditioning control, regarding the relationship between absolute humidity and dry bulb temperature, a state change relationship indicating a state change due to temperature control processing by the temperature control unit from the indoor state point of the air-conditioned space, and an indoor state of the air-conditioned space are determined. From the point, the sensible heat ratio correspondence relationship for partial latent heat load corresponding to the sensible heat ratio for partial latent heat load is compared, and the dry bulb temperature at which the relationships match is determined as the target supply air temperature for partial load. Air conditioning system.

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