JP2020176782A - Air conditioning system - Google Patents

Abstract

To improve comfort of a user by appropriately treating a latent heat load without excess and deficiency not only before start of use of an air-conditioned space but also after start of the use of the air-conditioned space.SOLUTION: Before start of use, an air-conditioning control section 4 performs estimated load air-conditioning control for controlling an operating state of a supply air temperature control section 2 so that a supply air temperature becomes a target supply air temperature for an estimated load and controlling an operating state of an air quantity control section 3. After start of the use, in the case of a normal latent heat load, the air-conditioning control section 4 performs normal air-conditioning control for controlling the operating state of the supply air temperature control section 2 so that the supply air temperature becomes a normal target supply air temperature and controlling the operating state of the air quantity control section 3, and in the case of a partial latent heat load, the air-conditioning control section 4 performs partial load air-conditioning control for controlling the operating state of the supply air temperature control section 2 so that the supply air temperature becomes a target supply air temperature for the partial load and controlling the operating state of the air quantity control section 3.SELECTED DRAWING: Figure 1

Description

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

For example, when a conference room, an office room, or the like is set as an air-conditioned space, even if the air-conditioning of the air-conditioned space is started from the start of using the air-conditioned space, the air-conditioned state of the air-conditioned space becomes the desired air-conditioned state. take time.

Therefore, conventionally, the number of people in each room is estimated from the schedule information of each employee, the set temperature suitable for the estimated number of people in the room is obtained, and the temperature of the air-conditioned space is set at the start of use of the air-conditioned space. Some air-conditioning controls are performed before the start of use of the air-conditioned space (see, for example, 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, so that the comfort of the user can be improved.

Japanese Unexamined Patent Publication No. 2013-89208

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

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

In view of this situation, the main problem of the present invention is to improve the comfort of the user by performing air conditioning before the start of use of the air-conditioned space, and to maintain the latent heat load even after the start of use of the air-conditioned space. The point is to provide an air conditioning system that can be properly processed to improve user comfort.

The first characteristic configuration of the present invention includes a supply air temperature adjusting unit that adjusts the supply air temperature of the air supplied to the air-conditioned space.
An air volume adjusting unit that adjusts the supply amount of air temperature-controlled by the air supply temperature adjusting unit to the air-conditioned space, and an air volume adjusting unit.
An air conditioning control unit that controls the operating state of the air supply temperature adjusting unit and the operating state of the air volume adjusting unit is provided.
Before the start of use of the air-conditioned space, the air-conditioning control unit estimates the latent heat load from the planned 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 air supply temperature adjusting unit so as to reach the target air supply temperature for the estimated load, and controls the operating state of the air volume adjusting unit according to the load state of the air-conditioned space. For air conditioning control,
If the latent heat load in the air-conditioned space is a normal latent heat load that is normally assumed after the start of use of the air-conditioned space, the supply air temperature of the air supplied by the air-conditioning control unit to the air-conditioned space is the normal latent heat load. The operating state of the air supply temperature adjusting unit is controlled so as to reach the target air supply temperature for normal use corresponding to the above, and the operating state of the air volume adjusting unit is controlled according to the load state of the air-conditioned space. Normal air conditioning control,
After the start of use of the air conditioning target space, if the latent heat load in the air conditioning target space is a partial latent heat load smaller than the normal latent heat load, the supply air temperature of the air supplied by the air conditioning control unit to the air conditioning target space is The operating state of the air supply temperature adjusting unit is controlled so as to reach the target air supply temperature for the partial load corresponding to the partial latent heat load, and the operation of the air volume adjusting unit is performed according to the load state of the air-conditioned space. The point is that it is configured to perform partial load air conditioning control to control the state.

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

Moreover, after the start of use, the air conditioning control unit selects whether to perform normal air conditioning control or partial load air conditioning control depending on what kind of load the latent heat load in the air conditioning target space is. As a result, after the start of use, regardless of whether the latent heat load of the air-conditioned space is a normal latent heat load (for example, a 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 handled without excess or deficiency, and the comfort of the user can be improved.

The second characteristic configuration of the present invention is that in the estimated load air conditioning control, the target air supply temperature for the estimated load is obtained by using the sensible heat ratio corresponding to the estimated latent heat load.
In the normal air conditioning control, the target air supply temperature for normal use is obtained by using the sensible heat ratio corresponding to the normal latent heat load.
The partial load air conditioning control is provided with a target air supply temperature calculation unit that obtains a target air supply temperature for the partial load using a sensible heat ratio corresponding to the partial latent heat load.

According to this configuration, the target air supply temperature calculation unit uses the sensible heat ratio according to the latent heat load of the air conditioning target space in each of the estimated load air conditioning control, the normal air conditioning control, and the partial load air conditioning control. , Appropriate target air supply temperature can be obtained. As a result, in each of the estimated load air conditioning control, the normal air conditioning control, and the partial load air conditioning control, air with an appropriate target air temperature can be supplied to the air conditioning target space, and the latent heat load is appropriate without excess or deficiency. Can be processed into.

Diagram showing the overall outline of the air conditioning system Psychrometric diagram showing state points when determining the target air supply temperature for an estimated load Psychrometric diagram showing the state points when determining the target air supply temperature for normal use Psychrometric diagram showing the state points when determining the target air supply temperature for partial load Flow chart showing the operation of the air conditioning control unit

An embodiment of the air conditioning system according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, this air conditioning system is temperature-controlled by an air conditioner 2 (corresponding to an air supply temperature adjusting unit) that adjusts the supply air temperature of the air supplied to the air conditioning target space 1 and an air conditioner 2. Air conditioning that controls the operation of the air conditioning system by controlling the operating states of the variable air volume unit 3, the air conditioner 2 and the variable air volume unit 3 that adjust the supply amount of the air conditioning air SA (supply air) to the air conditioning target space 1. A control unit 4 is provided.

The air conditioning system air-conditions the air supply passage 5 that supplies the air-conditioned air SA temperature-controlled by the air conditioner 2 to the air-conditioned space 1 and the return air RA from the air-conditioned space 1 as a flow path for passing air. A return air passage 6 for returning to the machine 2 and an outside air introduction path 7 for supplying the outside air OA to the air conditioner 2 are provided.

The upstream end of the air supply passage 5 is connected to the air conditioner 2, and the downstream portion is branched into a first branch air supply passage 5a and a second branch air supply passage 5b. A variable air volume unit 3 is arranged in each of the first branch air supply passage 5a and the second branch air supply passage 5b. The number of flow paths to which the downstream portion of the air supply passage 5 is branched can be appropriately changed, and for example, the number of branches can be increased according to the size of the air-conditioned space 1.

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

The air conditioner 2 is arranged in, for example, a space adjacent to the air conditioning target space 1. The air conditioner 2 is provided with an air conditioning fan 21 and a temperature control unit 22 for controlling the temperature of the air supplied by the operation of the air conditioning fan 21. By operating the air conditioning fan 21, the return air RA is supplied to the air conditioner 2 through the return air passage 6, and the outside air OA is supplied through the outside air introduction path 7. Not limited to this, the outside air OA may not be introduced through the outside air introduction path 7, and only the return air RA may be supplied to the air conditioner 2 through the return air passage 6.

The temperature control unit 22 is configured to control the temperature of the mixture of the return air RA and the outside air OA (or only the return air RA). The temperature control unit 22 is composed of a cold / hot water coil that exchanges heat between a heat medium (for example, cold water or hot water) circulated and supplied from a heat source machine (not shown) and the supplied air, and cools the supplied air. Or it is heat-treated. By the way, the temperature control unit 22 can also be configured by a cooling coil that cools the supplied air.

The air conditioning control unit 4 controls the temperature control unit 22 by controlling the supply amount of the heat medium supplied to the temperature control unit 22. The air conditioning control unit 4 controls the operating state of the air conditioner 2 and controls the temperature control unit 22 so that the temperature of the air conditioning air SA becomes the target air supply temperature, thereby controlling the operating state of the air conditioner 2. doing.

The variable air volume unit 3 is provided with, for example, a damper or the like that can adjust the flow path area of the air supply passage 5, and by adjusting the flow path area of the air supply passage 5, the air conditioning air SA can be moved to the air-conditioned space 1. The air supply air volume is adjustable. The air conditioning control unit 4 determines the amount of air supplied to the air conditioning target space 1 of the air conditioning air SA so that the indoor temperature of the air conditioning target space 1 becomes the set temperature based on the air conditioning state (load state) of the air conditioning target space 1. It is controlled by the variable air volume unit 3. Here, the indoor temperature of the air-conditioning target space 1 can be the detection temperature of the temperature sensor T arranged in the air-conditioning target space 1, and the set temperature can be the temperature set by the user's remote control operation or the like. it can.

The air conditioning control unit 4 controls the operating state of the air conditioning fan 21 in addition to the variable air volume unit 3 to move the air conditioning air SA to the air conditioning target space 1 so that the indoor temperature of the air conditioning target space 1 becomes the set temperature. The air 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 conditioning target space 1 becomes a set temperature, and controls the opening degree of the damper to the set target opening degree. The air conditioning control unit 4 has acquired information on the target opening degree set in the variable air volume unit 3 by communication or the like, and has obtained the required air volume in the variable air volume unit 3 based on the target opening degree. The air conditioning control unit 4 obtains the required air volume for each of the plurality of variable air volume units 3, and controls the rotation speed of the air conditioning fan 21 so that the total air volume of the required air volume 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 supply air volume of the air conditioning air SA to the air conditioning target space 1 of the air conditioning target space 1. The room temperature is set to a set temperature, and the variable air volume unit 3 and the air conditioning fan 21 correspond to the air volume adjusting unit.

When the air conditioning control unit 4 controls the rotation speed of the air conditioning fan 21, if the target opening degree in the variable air volume unit 3 is within the low opening side range, the air conditioning control unit 4 reduces the rotation speed of the air conditioning fan 21. The reduction side correction is performed to reduce the speed side 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 unit 4 does not perform the reduction side correction. Further, when the target opening degree in the variable air volume unit 3 is within the high opening side range, the air conditioning control unit 4 performs an increase side correction for increasing the rotation speed of the air conditioning fan 21 to the high rotation speed side by a predetermined correction amount. Is going. In this way, even when the target opening degree of the variable air volume unit 3 is out of the predetermined range, the air conditioning control unit 4 controls the rotation speed of the air conditioning fan 21 while performing the reduction side correction or the increase side correction. , The amount of air supplied to the air-conditioned space 1 of the air-conditioned air SA can be appropriately controlled.

The air conditioning control unit 4 is provided with a latent heat load estimation unit 9 that estimates the latent heat load from the planned number of users of the air conditioning target space 1. The latent heat load estimation unit 9 is linked to the scheduler system 30 that manages the reservation status, the usage status of the air conditioning target space 1, and the like for the usage time zone and the number of users of the air conditioning target space 1 via a communication device or the like.

The latent heat load estimation unit 9 grasps the usage start time, the planned number of users, and the like of the air-conditioned space 1 in cooperation with the scheduler system 30. The relationship between the number of users of the air-conditioned space 1 and the magnitude of the latent heat load is preset by experiments or the like, and the latent heat load estimation unit 9 determines the relationship between the number of users of the preset air-conditioned space 1 and the magnitude of the latent heat load. The magnitude of the latent heat load in the air-conditioned space 1 is estimated using the relationship and the information from the scheduler system 30.

In this way, since the latent heat load estimation unit 9 estimates the latent heat load before the start of use of the air conditioning target space 1, the air conditioning control unit 4 determines the latent heat load estimation unit 9 before the start of use of the air conditioning target space 1. Air conditioning control for the estimated load can be performed using the estimated latent heat load estimated in.

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

In order to perform the air conditioning control for the estimated load, the air conditioning control unit 4 is provided with a target air supply temperature calculation unit 10 for obtaining the target air supply temperature for the estimated load. The target air supply temperature calculation unit 10 obtains the target air supply temperature for the estimated load by using the sensible heat ratio corresponding to the estimated latent heat load.

How to obtain the target air supply temperature for the estimated load will be described with reference to FIG. 2, which is a psychrometric chart. In FIG. 2, the vertical axis is absolute humidity (kg / kg (DA)), the horizontal axis is dry-bulb temperature (° C.), and the sensible heat ratio K1 (= sensible heat / (sensible heat + latent heat)) and saturation curve H. Etc. are shown. Although FIG. 2 shows a case where the air-conditioned space 1 is cooled, the target air supply temperature for the estimated load can be obtained in the same manner when the air-conditioned space 1 is heated.

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

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 air supply temperature calculation unit 10 sets the dotted line D1 having the same inclination as the sensible heat ratio K1 so as to pass through the indoor state point A1, obtains the intersection point E1 between the dotted line D1 and the solid line B, and obtains the intersection point E1. The dry-bulb temperature F1 corresponding to is obtained as the target air supply temperature for the estimated load. In this way, the target air supply temperature calculation unit 10 obtains the target air supply temperature for the estimated load based on the sensible heat ratio corresponding to the estimated latent heat load.

In this way, the target air temperature calculation unit 10 uses the psychrometric chart shown in FIG. 2 to consider the state change due to the cooling process by the temperature control unit 22, and is used for the estimated load in the air conditioning control for the estimated load. Although the target air supply temperature is calculated, how to obtain the target air supply temperature for the estimated load can be changed as appropriate.

For example, as with the target air supply temperature for normal use, which will be described later, the target supply for the estimated load takes into consideration not only the state change due to the cooling process by the temperature control unit 22 but also the state change due to heat generation of the air conditioning fan 21 and the like. It is also possible to obtain the air temperature.

Further, the relationship between the sensible heat ratio and the target air temperature for the estimated load is set in advance by experiments or the like, and the target air temperature calculation unit 10 presets the relationship with the sensible heat ratio according to the estimated latent heat load. The target air supply temperature for the estimated load can be obtained by using and.

The air conditioning control unit 4 is configured to be capable of executing normal air conditioning control and partial load air conditioning control after the start of use of the air conditioning target space 1, in addition to the estimated load air conditioning control before the start of use of the air conditioning target space 1. 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 conditioning target space 1 becomes the normal target air supply temperature corresponding to the normal latent heat load. In addition, the operating state of the air conditioning fan 21 of the variable air volume unit 3 and the air conditioner 2 is controlled according to the load state of the air conditioning target space 1. In the partial load air conditioning control, the air conditioner 2 is operated so that the air supply temperature of the air supplied to the air conditioning target space 1 becomes the target air supply temperature for the partial load corresponding to the partial latent heat load. The state is controlled, and the operating state of the air conditioning fan 21 of the variable air volume unit 3 and the air conditioner 2 is controlled according to the load state of the air conditioning target space 1.

The target air supply temperature calculation unit 10 determines not only the target air supply temperature for the estimated load, but also the normal target air temperature in the normal air conditioning control and the target air temperature for the partial load in the partial load air conditioning control. I'm looking for. The target air supply temperature calculation unit 10 obtains the target air temperature for normal use by using the sensible heat ratio corresponding to the normal latent heat load, and uses the sensible heat ratio according to the partial latent heat load to obtain the target for partial load. We are looking for the supply air temperature.

The air-conditioned space 1 is assumed to be a conference room or an office room 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 usually a latent heat load and is subject to air conditioning. The maximum latent heat load in space 1 is usually the latent heat load. Therefore, the partial latent heat load is smaller than the maximum latent heat load.

How to obtain the target air supply temperature for normal use will be described with reference to FIG. 3, which is a psychrometric chart. In FIG. 3, the vertical axis is absolute humidity (kg / kg (DA)), the horizontal axis is dry-bulb temperature (° C.), and the sensible heat ratio K2 (= sensible heat / (sensible heat + latent heat)) and saturation curve H. Etc. are shown. Although FIG. 3 shows a case where the air-conditioned space 1 is cooled, the target air supply temperature for normal use can be obtained in the same manner when the air-conditioned space 1 is heated.

In FIG. 3, the indoor state point in summer is A1, and the outside air state point is A2. In this embodiment, since the return air RA and the outside air OA are mixed, the state point of this air-fuel mixture is set to A3. Since the air-fuel mixture is cooled by the cooling process by the temperature control unit 22, the state change of the air-fuel mixture in the temperature control unit 22 is shown by the solid line B. Further, since the air-fuel mixture is heated by the heat generated by the air conditioning fan 21, etc., the state change due to this heating is shown by the solid line C. As a result, the conditioned air SA supplied from the air conditioner 2 changes its state from A3 to A4 along the solid line B, and becomes 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 the 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 air supply temperature calculation unit 10 sets the dotted line D2 having the same inclination as the sensible heat ratio K2 so as to pass through the indoor state point A1, obtains the intersection point E2 between the dotted line D2 and the solid line C, and obtains the intersection point E2. The dry-bulb temperature F2 corresponding to is obtained as the target air supply temperature for normal use. In this way, the target air supply temperature calculation unit 10 obtains the target air supply temperature for normal use based on the sensible heat ratio corresponding to the normal latent heat load.

In this way, the target air supply temperature calculation unit 10 considers the state change due to the heat generation of the air conditioning fan 21 and the like in addition to the state change due to the cooling process by the temperature control unit 22 using the psychrometric chart shown in FIG. Then, the target air temperature for normal use in the normal air conditioning control is obtained, but how to obtain the target air supply temperature for normal use can be changed as appropriate.

For example, the relationship between the sensible heat ratio and the target air temperature for normal use is set in advance by experiments or the like, and the target air temperature calculation unit 10 sets the relationship between the sensible heat ratio according to the normal latent heat load and the preset relationship. Can be used to determine the target air supply temperature for normal use.

Further, in FIG. 3, in addition to the state change due to the cooling process by the temperature control unit 22, the state change due to the heat generation of the air conditioning fan 21 and the like is taken into consideration, but the same as the target air supply temperature for the estimated load described above. It is also possible to obtain the target air supply temperature for normal use by considering only the state change due to the cooling process by the temperature control unit 22.

How to obtain the target air supply temperature for the partial load will be described with reference to FIG. 4, which is a psychrometric chart. In FIG. 4, the vertical axis is absolute humidity (kg / kg (DA)), the horizontal axis is dry-bulb temperature (° C.), and the sensible heat ratio K3 (= sensible heat / (sensible heat + latent heat)) and saturation curve H. Etc. are shown. Although FIG. 4 shows a case where the air-conditioned space 1 is cooled, the target air supply temperature for normal use can be obtained in the same manner when the air-conditioned space 1 is heated.

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

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 air supply temperature calculation unit 10 sets the dotted line D3 having the same inclination as the sensible heat ratio K3 so as to pass through the indoor state point A1, obtains the intersection point E3 between the dotted line D3 and the solid line B, and obtains the intersection point E3. The dry-bulb temperature F3 corresponding to is obtained as the target air supply temperature for the partial load. In this way, the target air supply temperature calculation unit 10 obtains the target air supply temperature for the partial load based on the sensible heat ratio corresponding to the partial latent heat load.

In this way, the target air temperature calculation unit 10 uses the psychrometric chart as shown in FIG. 4, and considers the state change due to the cooling process by the temperature control unit 22, and considers the partial load in the air conditioning control for partial load. The target air supply temperature for partial load is calculated, but how to obtain the target air supply temperature for partial load can be changed as appropriate.

For example, as with the target air supply temperature for normal use, the target air supply temperature for partial load is taken into consideration not only the state change due to the cooling process by the temperature control unit 22 but also the state change due to heat generation of the air conditioning fan 21 and the like. Can also be asked.

Further, the relationship between the sensible heat ratio and the target air temperature for partial load is set in advance by experiments or the like, and the target air temperature calculation unit 10 presets the relationship with the sensible heat ratio according to the partial latent heat load. The target air supply temperature for the partial load can be obtained by using and.

In this case, for example, the relationship between the magnitude of the partial latent heat load and the target air supply temperature for the partial load can be set in advance by an experiment or the like. Therefore, the target air supply temperature calculation unit 10 uses the magnitude of the partial latent heat load and the relationship between the preset magnitude of the partial latent heat load and the target air supply temperature for the partial load to supply the target air supply for the partial load. The air temperature can be obtained.

As for the relationship between the size of the latent heat load set in advance and the target air temperature for partial load, for example, when the indoor humidity is 10% lower than the set humidity, the target air temperature for normal use is only 1 ° C. The increased temperature is set as the target air supply temperature for partial load, and when the room temperature is 20% lower than the set humidity, the temperature obtained by increasing the target air supply temperature for normal use by 2 ° C is used for partial load. It can be related to the target air supply temperature. In this way, when the amount of decrease in indoor humidity with respect to the set humidity is X%, the temperature obtained by raising the target air supply temperature for normal use by Y ° C. can be set as the target air supply temperature for partial load. However, X% and Y ° C. can be changed and set according to various conditions such as the condition of the air-conditioned space 1.

The operation of the air conditioning control unit 4 will be described with reference to the flowchart of FIG.
The air conditioning control unit 4 starts the estimated load air conditioning control based on the deviation between the temperature and humidity detected by the temperature sensor T and the humidity sensor S with respect to the set temperature and humidity set by the remote control or the like. It is possible to grasp how long it takes for the temperature and humidity of the air-conditioned space 1 to reach the set temperature and the set humidity.

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

Therefore, the air conditioning control unit 4 performs the estimated load air conditioning control at the start timing when the estimated load air conditioning control should be started (in the case of Yes in step # 1, step # 2). After that, when the use start time of the air-conditioning target space 1 comes, the latent heat load estimation unit 9 determines how large the latent heat load is at the start of use of the air-conditioning target space 1 (step # 3). In the case of Yes, step # 4). The latent heat load estimation unit 9 determines, for example, what the magnitude of the latent heat load is based on the detection information of the humidity sensor S. Considering the normal latent heat load, set the normal latent heat range above the minimum value based on the set humidity, and if the detected humidity of the humidity sensor S is within the normal latent heat range, it is determined that the latent heat load is the normal latent heat load. it can. If the detected humidity of the humidity sensor S is 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 estimation 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 estimation 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 (step # 6 in the case of the partial latent heat load in step # 4).

In this way, since the air conditioning control unit 4 performs the air conditioning control for the estimated load before the start of use of the air conditioning target space 1, the supply amount to the air conditioning target space 1 is adjusted according to the load state of the air conditioning target space 1. While being able to supply air at the target supply temperature for the estimated load. Therefore, since the air-conditioned space 1 can be controlled to a desired air-conditioned state at the start of use, the comfort of the user 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 load the latent heat load in the air conditioning target space 1 is. There is. As a result, after the start of use, regardless of whether the latent heat load of the air-conditioned space 1 is a normal latent heat load (for example, a 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 handled without excess or deficiency, and the comfort of the user can be improved.

[Another Embodiment]
(1) In the above embodiment, the latent heat load estimation unit 9 determines the magnitude of the latent heat load at the start of 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 be determined based on the actual number of users of the air-conditioned space 1. By providing a device for identifying the number of users such as a camera and a motion sensor that captures the air-conditioned space 1, the number of users of the air-conditioned space 1 can be grasped. If the number of users grasped by the number of users identification device is equal to or greater than the set number of people based on the maximum number of people that can be used in the air-conditioned space 1, it is determined that the load is normally latent heat, and if the number of users is less than the set number of people It can be determined that it is a partial latent heat load.

(2) In the above embodiment, the air conditioning control unit 4 controls the rotation speed of the air conditioning fan 21 to adjust the amount of air supplied from the air conditioner 2 to the air conditioning target space 1, and the air conditioning target space 1 An example is shown in which the air volume adjusting unit for adjusting the air supply amount to the air conditioning unit 3 is composed of the variable air volume unit 3 and the air conditioning fan 21, but the configuration for adjusting the air supply amount to the air conditioning target space 1 is shown. 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 conditioning target space 1 by controlling the rotation speed of the air conditioning fan 21, so that the variable air volume unit 3 is omitted. You can also do it. In this case, the air volume adjusting unit can be configured by the air conditioning fan 21.

Further, unlike the above embodiment, the air conditioning control unit 4 maintains the rotation speed of the air conditioning fan 21 at a constant rotation speed, so that the amount of air supplied from the air conditioner 2 to the air conditioning target space 1 is set to a constant amount. Can be left. In this case, since the variable air volume unit 3 can adjust the amount of air supplied to the air-conditioned space 1, the air volume adjusting unit can be configured by the variable air volume unit 3.

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

Claims (2)

A supply air temperature adjustment unit that adjusts the supply air temperature of the air supplied to the air-conditioned space,
An air volume adjusting unit that adjusts the supply amount of air temperature-controlled by the air supply temperature adjusting unit to the air-conditioned space, and an air volume adjusting unit.
An air conditioning control unit that controls the operating state of the air supply temperature adjusting unit and the operating state of the air volume adjusting unit is provided.
Before the start of use of the air-conditioned space, the air-conditioning control unit estimates the latent heat load from the planned 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 air supply temperature adjusting unit so as to reach the target air supply temperature for the estimated load, and controls the operating state of the air volume adjusting unit according to the load state of the air-conditioned space. For air conditioning control,
If the latent heat load in the air-conditioned space is a normal latent heat load that is normally assumed after the start of use of the air-conditioned space, the supply air temperature of the air supplied by the air-conditioning control unit to the air-conditioned space is the normal latent heat load. The operating state of the air supply temperature adjusting unit is controlled so as to reach the target air supply temperature for normal use corresponding to the above, and the operating state of the air volume adjusting unit is controlled according to the load state of the air-conditioned space. Normal air conditioning control,
After the start of use of the air conditioning target space, if the latent heat load in the air conditioning target space is a partial latent heat load smaller than the normal latent heat load, the supply air temperature of the air supplied by the air conditioning control unit to the air conditioning target space is The operating state of the air supply temperature adjusting unit is controlled so as to reach the target air supply temperature for the partial load corresponding to the partial latent heat load, and the operation of the air volume adjusting unit is performed according to the load state of the air-conditioned space. An air conditioning system that is configured to perform partial load air conditioning control that controls the state. In the estimated load air conditioning control, the target air supply temperature for the estimated load is obtained by using the sensible heat ratio corresponding to the estimated latent heat load.
In the normal air conditioning control, the target air supply temperature for normal use is obtained by using the sensible heat ratio corresponding to the normal latent heat load.
The air conditioning system according to claim 1, wherein the partial load air conditioning control includes a target air supply temperature calculation unit that obtains a target air supply temperature for the partial load using a sensible heat ratio corresponding to the partial latent heat load. ..

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