JP2010078245A - Humidity control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniformly cool an indoor space during outside air cooling operation of a humidity control system having a plurality of humidity control units. <P>SOLUTION: Temperature of outdoor air and temperature of indoor air sucked to each humidity control unit (10) are detected, and a difference between these temperatures ΔT1-4 is calculated. Based on the temperature difference ΔT1-4 with respect to each humidity control unit (10), an air quantity control part (98) controls the air quantity of an exhaust fan (25). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a humidity control system that adjusts indoor humidity using a plurality of humidity control units, and particularly relates to a humidity control system capable of cooling outside air.

  Conventionally, humidity control devices that adjust the humidity of air are known. As this type of humidity control apparatus, Patent Document 1 discloses an apparatus for conditioning air using an adsorption heat exchanger carrying an adsorbent.

  The humidity control apparatus of Patent Document 1 has a refrigerant circuit in which a refrigerant circulates and a refrigeration cycle is performed. A compressor, a first adsorption heat exchanger, a second adsorption heat exchanger, an expansion valve, and a four-way switching valve are connected to the refrigerant circuit. The compressor is provided in a predetermined storage chamber in the casing. Moreover, the 1st adsorption heat exchanger and the 2nd adsorption heat exchanger are each provided in the 1st heat exchanger chamber and the 2nd adsorption heat exchanger chamber in a casing.

  In the refrigerant circuit, the circulation direction of the refrigerant can be switched reversibly according to the setting of the four-way switching valve. Specifically, in the refrigerant circuit, the setting of the four-way switching valve is switched every predetermined time, so that the high pressure refrigerant flows through the first adsorption heat exchanger and the low pressure refrigerant flows through the second adsorption heat exchanger. And the operation in which the low-pressure refrigerant flows through the first adsorption heat exchanger and the high-pressure refrigerant flows through the second adsorption heat exchanger are alternately performed.

  In the adsorption heat exchanger (evaporator) through which the low-pressure refrigerant flows, the adsorbent is cooled and moisture in the air is adsorbed by the adsorbent. In the adsorption heat exchanger (condenser or radiator) through which the high-pressure refrigerant flows, the adsorbent is heated and moisture is desorbed from the adsorbent and applied to the air. As described above, in each adsorption heat exchanger, the operation of adsorbing moisture (adsorption operation) and the operation of desorbing moisture (regeneration operation) are alternately performed with the switching of the four-way switching valve.

  This humidity control apparatus supplies one of the air in contact with the adsorbent carried on each adsorption heat exchanger into the room and discharges the other into the room. For example, in the humidity control apparatus during the humidity control operation, the air that has passed through the first and second adsorption heat exchangers that operate as an evaporator is supplied to the room and passes through the one that operates as a condenser. A flow path of air in the casing is set so that air is discharged to the outside of the room. In this humidity control apparatus, such air circulation paths are switched by opening and closing operations of a plurality of dampers.

Patent Document 2 discloses an air conditioner capable of so-called outside air cooling. This air conditioner supplies outdoor air having a relatively low temperature directly into the room at a time when the temperature of the outdoor air is lower than the temperature of the room air (so-called intermediate period). Thereby, the outside air cooling which cools the room using outside air is performed, and the energy saving is improved.
JP 2005-291532 A JP 2005-172283 A

  By the way, in a relatively wide space such as an office or a space where the latent heat load in the room is high, it is conceivable to adjust the humidity in the same room by using a plurality of humidity control devices as described above. That is, it is conceivable that a single humidity control system is configured by a plurality of humidity control units that condition the air and supply the air to the room. In such a humidity control system, it is also conceivable to perform the above-described outdoor air cooling in each humidity control unit. That is, in the intermediate period or the like, it is conceivable to cool the room by performing the operation of discharging the room air to the outside while supplying the room air to the room by each humidity control unit. On the other hand, when natural ventilation is performed by opening a window or the like during the outdoor air cooling operation of such a humidity control system, the indoor temperature may become non-uniform.

  This point will be described with reference to FIG. The humidity control system (100) of this example includes four humidity control units (101, 102, 103, 104). Of these humidity control units (101, 102, 103, 104), the first humidity control unit (101) and the second humidity control unit (102) are provided near the indoor window (W), and the third humidity control unit (103) The 4th humidity control unit (104) is provided in the position away from the window (W). That is, the first and second units (101, 102) take in indoor air in the vicinity of the window (W) and discharge it outside the room, and the third and fourth units (103, 104) are relatively far from the window (W). Takes in indoor air and discharges it outside.

  In the humidity control system (100), when the outdoor air cooling operation is performed in each humidity control unit (101, 102, 103, 104), for example, in the intermediate period, the indoor air (RA) is discharged outside the outdoor in each humidity control unit (101, 102, 103, 104). Air is introduced into the room as supply air (SA). Thereby, the room is cooled by each humidity control unit (101, 102, 103, 104). In such a situation, it is assumed that the window (W) is opened for natural ventilation. In this case, since the outdoor air taken into the room through the window (W) is sucked only by the first and second humidity control units (101, 102) close to the window (W), the outdoor air is located far from the window (W). The third and fourth humidity control units (103, 104) do not reach the side. For this reason, the room air in the vicinity of the first and second humidity control units (101, 102) is quickly cooled, while the room air on the third and fourth humidity control units (103, 104) side is not easily cooled. I will. As a result, the indoor temperature becomes non-uniform during the outdoor air cooling operation, and the energy saving and comfort in the room are impaired.

  This invention is made | formed in view of this point, The objective is to enable it to cool a room | chamber interior uniformly at the time of the external air cooling operation | movement of the humidity control system which has a some humidity control unit.

  The first invention includes an exhaust fan (25) for sucking indoor air and discharging it to the outside, an air supply fan (26) for sucking outdoor air and supplying it to the room, and humidity of air supplied to the room And a plurality of humidity control units (10) each having a humidity control means (51, 52) for adjusting the humidity, the plurality of humidity control units (10), while discharging indoor air in the same room to the outside, The present invention is intended for a humidity control system configured to be able to execute outdoor air cooling operations in which outdoor air is supplied to the same room without being controlled by the humidity control means (51, 52). The humidity control system detects the temperature of the indoor air sucked into the exhaust fan (25) for each humidity control unit (10), and detects the temperature of the outdoor air. The temperature difference between the outside air temperature detected by the outside air temperature sensor (91) and each outside air temperature sensor (92) and the outside air temperature detected by the outside air temperature sensor (91) is determined for each humidity control unit (10). The temperature difference deriving unit (97) to be derived and the exhaust fan (25) of each humidity control unit (10) based on each temperature difference derived by the temperature difference deriving unit (97) during the outside air cooling operation And an air volume control unit (98) for controlling the air volume of the air.

  The humidity control system of the first invention is provided with a plurality of humidity control units (10). Each humidity control unit (10) includes an exhaust fan (25), an air supply fan (26), and humidity control means (51, 52). The humidity control unit (10) performs, for example, an operation of adjusting the humidity of outdoor air by the humidity control means (51, 52) and supplying the air after humidity adjustment to the room. Each humidity control unit (10) is configured to be able to perform an outdoor air cooling operation in an intermediate period or the like in which outdoor air (outside air) is lower than indoor air (inside air). In this outdoor air cooling operation, the exhaust fan (25) is operated to take in indoor air and discharge it outside the room. At the same time, the outdoor air is taken in by operating the air supply fan (26). The outdoor air is supplied to the room without being conditioned by the humidity adjusting means (51, 52). Thereby, indoor ventilation is performed and outdoor air is positively supplied indoors. As a result, the room is cooled.

  In the present invention, when natural ventilation is performed by opening a window or the like during the above-described outdoor air cooling operation, the air volume of the exhaust fan (25) of each humidity control unit (10) can be uniformly cooled by natural ventilation. Is controlling.

  Specifically, during the outdoor air cooling operation, the temperature difference deriving unit (97) detects the temperature difference between the indoor air temperature detected by each of the indoor air temperature sensors (92) and the outdoor air temperature detected by the outdoor air temperature sensor (91). ΔT is derived individually for each humidity control unit (10). For this reason, even when the indoor temperature distribution becomes non-uniform when natural ventilation is performed with the windows open, such temperature distribution unevenness can be grasped by the temperature difference ΔT.

  More specifically, for example, it is assumed that there are windows in the vicinity of the first humidity control unit (10a) and the second humidity control unit (10b) among the plurality of humidity control units (10). In this case, the outdoor air taken in from the window is easily taken into the first humidity control unit (10a) and the second humidity control unit (10b) and spreads to the remaining humidity control units (10c, 10d). It becomes difficult. Therefore, in the room, the temperature difference ΔT between the inside air and the outside air in the first and second humidity control units (10a, 10b) becomes relatively small, and the inside air in the third and fourth humidity control units (10c, 10d). And the temperature difference ΔT between the outside air becomes relatively large. For this reason, it is possible to grasp the uneven temperature distribution in the room by deriving the temperature difference ΔT in each humidity control unit (10).

  The air volume control unit (98) controls the air volume of the exhaust fan (25) (that is, the amount of indoor air sucked) based on the temperature difference ΔT for each humidity control unit (10). For this reason, by controlling the air volume of the exhaust fan (25) so as to eliminate the uneven temperature distribution, the room can be uniformly cooled by natural ventilation.

  In a second aspect based on the first aspect, the temperature difference deriving section (97) is configured to obtain a change amount of the temperature difference for each humidity control unit (10) in a predetermined time, and the air flow control The section (98) is characterized in that when the amount of change in the temperature difference of the humidity control unit (10) exceeds a predetermined value, the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) is reduced. To do.

  In the second invention, the temperature difference deriving unit (97) derives the amount of change in the temperature difference ΔT for each humidity control unit (10). Here, during the outdoor air cooling operation, for example, the change amount of the temperature difference ΔT between the first and second humidity control units (10a, 10b) is larger than a predetermined value, and the third and fourth humidity control units (10c, 10d). It is assumed that the change amount of the temperature difference ΔT is equal to or less than a predetermined value. In this case, the indoor air is quickly cooled in the vicinity of the first and second humidity control units (10a, 10b) by natural ventilation, and in the vicinity of the third and fourth humidity control units (10c, 10d). It can be determined that the cooling is not easy.

  Therefore, the air volume control unit (98) in such a case sets the air volume of each exhaust fan (25) of the first and second humidity control units (10a, 10b) in which the change amount of the temperature difference ΔT is larger than a predetermined value. Decrease. As a result, the amount of outdoor air from the windows taken into the first and second humidity control units (10a, 10b) is reduced, and the amount taken into the third and fourth humidity control units (10c, 10d) is reduced accordingly. The amount of outdoor air from the window is increased. As a result, the uneven temperature distribution in the room is eliminated.

  In a third aspect based on the first aspect, the temperature difference deriving section (97) is configured to obtain a change amount of the temperature difference for each humidity control unit (10) in a predetermined time, and the air volume control When the change amount of the temperature difference of the humidity control unit (10) becomes smaller than the predetermined value, the section (98) of the humidity control unit (10) other than the corresponding humidity control unit (10) It is characterized by increasing the air volume.

  In the third invention, the temperature difference deriving unit (97) derives the amount of change in the temperature difference ΔT for each humidity control unit (10). Here, during the outdoor air cooling operation, for example, the change amount of the temperature difference ΔT between the first and second humidity control units (10a, 10b) is larger than a predetermined value, and the third and fourth humidity control units (10c, 10d). It is assumed that the change amount of the temperature difference ΔT is equal to or less than a predetermined value. In this case, the indoor air is quickly cooled in the vicinity of the first and second humidity control units (10a, 10b) by natural ventilation, and in the vicinity of the third and fourth humidity control units (10c, 10d). By this, it can be determined that the room air is not easily cooled.

  Therefore, the air volume control unit (98) in such a case adjusts the air volume of each exhaust fan (25) of the third and fourth humidity control units (10c, 10d) in which the change amount of the temperature difference ΔT is smaller than a predetermined value. Increase. As a result, the amount of outdoor air from the windows taken into the third and fourth humidity control units (10c, 10d) increases, and the corresponding amount is taken into the first and second humidity control units (10a, 10b). The amount of outdoor air from the window is reduced. As a result, the uneven temperature distribution in the room is eliminated.

  According to a fourth aspect of the present invention, in the first aspect, the air flow rate control unit (98) is configured such that when the temperature difference derived by the temperature difference deriving unit (97) increases, the exhaust fan of the corresponding humidity control unit (10) When the air volume of (25) is increased and the temperature difference derived by the temperature difference deriving section (97) is reduced, the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) is decreased. To do.

  In the fourth invention, unlike the second and third inventions, the air volume of the corresponding exhaust fan (25) is controlled according to the magnitude of the temperature difference ΔT of each humidity control unit (10). Specifically, for example, when the temperature difference ΔT in the third humidity control unit (10c) or the fourth humidity control unit (10d) is relatively large, the third humidity control unit (10c) or the second humidity control unit is caused by outdoor air from the window. It can be determined that the vicinity of the four humidity control units (10d) is not sufficiently cooled. In such a case, the air volume control unit (98) increases the air volume of the exhaust fan (25) of the third humidity control unit (10c) or the fourth humidity control unit (10d). As a result, outdoor air from the window reaches the vicinity of the third humidity control unit (10c) and the fourth humidity control unit (10d), and uneven temperature distribution in the room is eliminated.

  For example, when the temperature difference ΔT between the first humidity control unit (10a) and the second humidity control unit (10b) is relatively small, the vicinity of the first and second humidity control units (10a, 10b) is caused by natural ventilation. Although it is sufficiently cooled, it can be determined that there is a possibility that the vicinity of the remaining third humidity control unit (10c) and the fourth humidity control unit (10d) may not be sufficiently cooled. Therefore, in such a case, the air volume control unit (98) reduces the air volume of the exhaust fan (25) of the first humidity control unit (10a) and the second humidity control unit (10b). As a result, outdoor air from the window reaches the vicinity of the third humidity control unit (10c) and the fourth humidity control unit (10d), and uneven temperature distribution in the room is eliminated.

  The fifth invention includes an exhaust fan (25) for sucking indoor air and discharging it to the outside, an air supply fan (26) for sucking outdoor air and supplying it to the room, and humidity of air supplied to the room And a plurality of humidity control units (10) each having a humidity control means (51, 52) for adjusting the humidity, the plurality of humidity control units (10), while discharging indoor air in the same room to the outside, The present invention is intended for a humidity control system configured to be able to execute outdoor air cooling operations in which outdoor air is supplied to the same room without being controlled by the humidity control means (51, 52). The humidity control system detects the temperature and humidity of the indoor air sucked into the exhaust fan (25) for each humidity control unit (10), and adjusts the enthalpy of the room air based on the temperature and humidity. An inside air enthalpy deriving unit (92, 94, 97) derived for each unit (10), and an outside air enthalpy deriving unit for detecting the temperature and humidity of outdoor air and deriving the enthalpy of outdoor air based on the temperature and humidity ( 91,93,97) and the enthalpy difference between the inside air enthalpy derived from the inside air enthalpy deriving section (92,94,97) and the outside air enthalpy derived from the outside air enthalpy deriving section (91,93,97) The enthalpy difference deriving unit (97) derived for each humidity control unit (10), and each humidity control unit based on the enthalpy difference derived by the enthalpy difference deriving unit (97) during the outdoor air cooling operation Exclusion of (10) An air volume control unit (98) for controlling the air volume of the air fan (25) is further provided.

  The fifth invention is directed to a humidity control system similar to the first invention. On the other hand, in the fifth invention, unlike the first invention, the air volume of the exhaust fan (25) for each humidity control unit (10) is controlled in consideration of the humidity of indoor air and outdoor air. Specifically, each humidity control unit (10) of the present invention detects the temperature and humidity of room air sucked into each exhaust fan (25), and from these, enthalpy of room air (hereinafter referred to as room air enthalpy) The inside air enthalpy deriving section (92, 94, 97) is provided for deriving the humidity for each humidity control unit (10). In addition, the humidity control system includes an outdoor air enthalpy deriving unit (91, 93, 97) that detects the temperature and humidity of the outdoor air and derives the enthalpy of the outdoor air (hereinafter referred to as “outdoor enthalpy”) from these. During the outdoor air cooling operation, the enthalpy difference deriving unit (97) includes the inside air enthalpy derived from the inside air enthalpy deriving unit (92,94,97) and the outside air enthalpy derived from the outside air enthalpy deriving unit (91,93,97). Is derived individually for each humidity control unit (10). The air volume control section (98) controls the air volume of the exhaust fan (25) based on the enthalpy difference Δh of each humidity control unit (10). That is, in the fifth invention, not only the temperature difference between the outside air and the inside air but also the humidity difference between the outside air and the inside air is taken into consideration to control the air volume of the exhaust fan (25) of each humidity control unit (10). For this reason, in the present invention, not only the temperature distribution unevenness of the room air is eliminated as in the first invention, but also the distribution of the indoor enthalpy (that is, the sum of the sensible heat load and the latent heat load) is eliminated. be able to.

  In a sixth aspect based on the fifth aspect, the enthalpy difference deriving unit (97) is configured to obtain a change amount of the enthalpy difference for each humidity control unit (10) in a predetermined time, and the air volume control The section (98) is characterized in that when the amount of change in the enthalpy difference of the humidity control unit (10) is greater than a predetermined value, the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) is reduced. To do.

  In the sixth invention, the enthalpy difference deriving unit (97) derives the amount of change in the enthalpy difference Δh for each humidity control unit (10). Here, during the outdoor air cooling operation, for example, the amount of change in the enthalpy difference Δh of the first and second humidity control units (10a, 10b) is larger than a predetermined value, and the third and fourth humidity control units (10c, 10d) It is assumed that the amount of change in the enthalpy difference Δh is less than or equal to a predetermined value. In this case, in the vicinity of the first and second humidity control units (10a, 10b) due to natural ventilation, the indoor air is quickly cooled and the enthalpy difference changes to a small value, whereas the third and fourth humidity control units ( In the vicinity of 10c, 10d), it can be determined that the indoor air is not easily cooled by natural ventilation and the enthalpy difference has not changed much.

  Therefore, the air volume control unit (98) in such a case adjusts the air volume of each exhaust fan (25) of the first and second humidity control units (10a, 10b) in which the change amount of the enthalpy difference Δh is larger than a predetermined value. Decrease. As a result, the amount of outdoor air from the windows taken into the first and second humidity control units (10a, 10b) is reduced, and the amount taken into the third and fourth humidity control units (10c, 10d) is reduced accordingly. The amount of outdoor air from the window is increased. As a result, the uneven enthalpy distribution in the room can be eliminated.

  In a seventh aspect based on the sixth aspect, the enthalpy difference deriving unit (97) is configured to obtain a change amount of the enthalpy difference for each humidity control unit (10) in a predetermined time, and the air volume control When the amount of change in the enthalpy difference of the humidity control unit (10) becomes smaller than a predetermined value, the section (98) of the humidity control unit (10) other than the corresponding humidity control unit (10) It is characterized by increasing the air volume.

  In the seventh invention, the enthalpy difference deriving unit (97) derives the amount of change in the enthalpy difference Δh for each humidity control unit (10). Here, during the outdoor air cooling operation, for example, the amount of change in the enthalpy difference Δh of the first and second humidity control units (10a, 10b) is larger than a predetermined value, and the third and fourth humidity control units (10c, 10d) It is assumed that the amount of change in the enthalpy difference Δh is less than or equal to a predetermined value. In this case, in the vicinity of the first and second humidity control units (10a, 10b) due to natural ventilation, the indoor air is quickly cooled and the enthalpy difference changes to a small value, whereas the third and fourth humidity control units ( In the vicinity of 10c, 10d), it can be determined that the indoor air is not easily cooled by natural ventilation and the enthalpy difference has not changed much.

  Therefore, the air volume control unit (98) in such a case sets the air volume of each exhaust fan (25) of the third and fourth humidity control units (10c, 10d) in which the change amount of the enthalpy difference Δh is smaller than a predetermined value. Decrease. As a result, the amount of outdoor air from the windows taken into the third and fourth humidity control units (10c, 10d) increases, and the corresponding amount is taken into the first and second humidity control units (10a, 10b). The amount of outdoor air from the window is increased. As a result, the uneven enthalpy distribution in the room can be eliminated.

  In an eighth aspect based on the fifth aspect, when the enthalpy difference derived by the enthalpy difference deriving section (97) increases, the air flow control section (98) increases the exhaust fan of the corresponding humidity control unit (10). When the air volume of (25) is increased and the enthalpy difference derived by the enthalpy difference deriving section (97) is reduced, the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) is decreased. To do.

  In the eighth invention, unlike the sixth and seventh inventions, the air volume of the corresponding exhaust fan (25) is controlled according to the magnitude of the enthalpy difference Δh of each humidity control unit (10). Specifically, for example, when the enthalpy difference ΔT in the third humidity control unit (10c) or the fourth humidity control unit (10d) is relatively large, the third humidity control unit (10c) or the fourth humidity control by natural ventilation. It can be determined that the vicinity of the unit (10d) is not sufficiently cooled. In such a case, the air volume control unit (98) increases the air volume of the exhaust fan (25) of the third humidity control unit (10c) or the fourth humidity control unit (10d). As a result, the outdoor air from the window reaches the vicinity of the third humidity control unit (10c) and the fourth humidity control unit (10d), and the uneven enthalpy distribution in the room is eliminated.

  For example, when the enthalpy difference Δh in the first humidity control unit (10a) and the second humidity control unit (10b) is relatively small, the vicinity of the humidity control unit (10) is sufficiently cooled by natural ventilation. Accordingly, it can be determined that the vicinity of the remaining third humidity control unit (10c) and the fourth humidity control unit (10d) may not be sufficiently cooled. Therefore, in such a case, the air volume control unit (98) reduces the air volume of the exhaust fan (25) of the first humidity control unit (10a) and the second humidity control unit (10b). As a result, the outdoor air from the window reaches the vicinity of the third humidity control unit (10c) and the fourth humidity control unit (10d), and the uneven enthalpy distribution in the room is eliminated.

  In 1st invention, the temperature of outdoor air and the temperature of each indoor air suck | inhaled by each humidity control unit (10) are detected, and it is based on the temperature difference of these external air and each internal air at the time of external air cooling operation. The air volume of the exhaust fan (25) is controlled. Therefore, according to the present invention, even when the indoor temperature distribution becomes non-uniform when natural ventilation is performed by opening a window or the like, such uneven temperature distribution is caused by the above temperature differences. I can grasp it. Therefore, by controlling the air volume of the exhaust fan (25) so as to eliminate this uneven temperature distribution, the room can be uniformly cooled by natural ventilation. As a result, it is possible to improve indoor energy saving and comfort.

  In the present invention, the outside air temperature sensor (91) and the inside air temperature sensor (92) for grasping the unevenness of the temperature distribution can also be used for air humidity adjustment by the humidity adjusting means (51, 52).

  In the second aspect of the invention, when the change amount of each temperature difference for each humidity control unit (10) becomes larger than a predetermined value during the outside air cooling operation, the humidity control unit (10 ) To reduce the air volume of the exhaust fan (25). Thus, according to the present invention, it is possible to eliminate the uneven temperature distribution in the room while reducing the power by reducing the air volume of the exhaust fan (25).

  In the third aspect of the invention, when the change amount of each temperature difference for each humidity control unit (10) becomes larger than a predetermined value during the outside air cooling operation, the humidity control unit (10 The exhaust air volume of other humidity control units (10) is increased. Thereby, a lot of outdoor air introduced from the window or the like can be introduced, and the room can be cooled quickly and uniformly.

  In the fourth aspect of the invention, during the outdoor air cooling operation, the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) is increased or decreased according to the size of each temperature difference of each humidity control unit (10). I have to. Thereby, according to the present invention, the temperature distribution in the room can be made uniform by relatively simple control.

  In 5th invention, the difference (each enthalpy difference) between the outside air enthalpy calculated | required from the temperature and humidity of outdoor air, and each indoor air enthalpy calculated | required from the temperature and humidity of the indoor air suck | inhaled by each humidity control unit (10) is carried out. The air volume of the exhaust fan (25) of each humidity control unit (10) is controlled based on each enthalpy difference during the outside air cooling operation. For this reason, according to the present invention, when the indoor temperature distribution becomes non-uniform when natural ventilation is performed with windows open, such uneven temperature distribution is caused by the enthalpy differences described above. I can grasp it. In addition, in the present invention, since the outside air humidity and the inside air humidity are also taken into consideration, the indoor enthalpy distribution can be made uniform.

  In the sixth aspect of the present invention, when the change amount of each enthalpy difference for each humidity control unit (10) becomes larger than a predetermined value during the outside air cooling operation, the humidity control unit (10 ) To reduce the air volume of the exhaust fan (25). As a result, according to the present invention, it is possible to eliminate unevenness in indoor temperature and enthalpy distribution while reducing the power by reducing the air volume of the exhaust fan (25).

  In the seventh invention, when the change amount of each enthalpy difference for each humidity control unit (10) becomes larger than a predetermined value during the outside air cooling operation, the humidity control unit (10 The exhaust air volume of other humidity control units (10) is increased. Thereby, a lot of outdoor air introduced from the window or the like can be introduced, and the room can be cooled quickly and uniformly.

  In the eighth invention, during the outdoor air cooling operation, the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) is increased or decreased according to the magnitude of each enthalpy difference for each humidity control unit (10). I have to. Thereby, according to this invention, indoor temperature and distribution of enthalpy can be equalized by comparatively simple control.

  In the present invention, the outside air temperature and outside humidity detected by the outside air enthalpy deriving unit (91,93,97) or the inside air temperature and inside air humidity detected by the inside air enthalpy deriving unit (92,94,97) It can also be used for air humidity control by means (51, 52).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

Embodiment 1 of the Invention
The humidity control system (1) of Embodiment 1 includes a plurality of humidity control units (10), and these humidity control units (10) adjust the humidity in the same room.

<Configuration of humidity control unit>
First, the overall configuration of the humidity control unit (10) will be described with reference to FIGS. In the humidity control system (1) of the present embodiment, each humidity control unit (10) has the same configuration. The humidity control unit (10) includes a casing (11). A refrigerant circuit (50) is accommodated in the casing (11). The refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion valve (55). It is connected. Details of the refrigerant circuit (50) will be described later.

  The casing (11) is formed in a rectangular parallelepiped shape that is slightly flat and relatively low in height. In the casing (11) shown in FIG. 1, the left front side (ie, front) is the front panel (12), and the right back side (ie, back) is the back panel (13). Is the first side panel (14), and the left back side is the second side panel (15).

  The casing (11) is formed with an outside air suction port (24), an inside air suction port (23), an air supply port (22), and an exhaust port (21). The outside air inlet (24) and the inside air inlet (23) are open to the back panel (13). The outside air inlet (24) is disposed in the lower part of the back panel (13). The inside air suction port (23) is arranged in the upper part of the back panel (13). The air supply port (22) is disposed near the end of the first side panel (14) on the front panel (12) side. The exhaust port (21) is disposed near the end of the second side panel (15) on the front panel (12) side.

  The internal space of the casing (11) includes an upstream divider plate (71), a downstream divider plate (72), a central divider plate (73), a first divider plate (74), and a second divider plate ( 75). These partition plates (71 to 75) are all erected on the bottom plate of the casing (11), and divide the internal space of the casing (11) from the bottom plate of the casing (11) to the top plate. .

  The upstream divider plate (71) and the downstream divider plate (72) are parallel to the front panel portion (12) and the rear panel portion (13), and are spaced at a predetermined interval in the longitudinal direction of the casing (11). Has been placed. The upstream divider plate (71) is disposed closer to the rear panel portion (13). The downstream partition plate (72) is disposed closer to the front panel portion (12).

  The first partition plate (74) and the second partition plate (75) are installed in a posture parallel to the first side panel portion (14) and the second side panel portion (15). The first partition plate (74) is spaced a predetermined distance from the first side panel (14) so as to close the space between the upstream partition plate (71) and the downstream partition plate (72) from the right side. Has been placed. The second partition plate (75) is spaced from the second side panel (15) by a predetermined distance so as to close the space between the upstream partition plate (71) and the downstream partition plate (72) from the left side. Has been placed.

  The central partition plate (73) is disposed between the upstream partition plate (71) and the downstream partition plate (72) in a posture orthogonal to the upstream partition plate (71) and the downstream partition plate (72). Yes. The central partition plate (73) is provided from the upstream partition plate (71) to the downstream partition plate (72), and the space between the upstream partition plate (71) and the downstream partition plate (72) is left and right. It is divided into.

  In the casing (11), the space between the upstream partition plate (71) and the back panel (13) is divided into two upper and lower spaces, and the upper space forms the inside air passage (32). The lower space constitutes the outside air passage (34). The inside air passage (32) communicates with the inside air inlet (23), and the outside air passage (34) communicates with the outside air inlet (24). A room air filter (27) is installed in the room air passage (32). An outside air filter (28) is installed in the outside air passage (34).

  The space between the upstream divider plate (71) and the downstream divider plate (72) in the casing (11) is divided into left and right by the central divider plate (73), and is located on the right side of the central divider plate (73). The space constitutes the first heat exchanger chamber (37), and the space on the left side of the central partition plate (73) constitutes the second heat exchanger chamber (38). A first adsorption heat exchanger (51) is accommodated in the first heat exchanger chamber (37). The second adsorption heat exchanger (52) is accommodated in the second heat exchanger chamber (38). Moreover, although not shown in figure, the electric expansion valve (55) of a refrigerant circuit (50) is accommodated in the 1st heat exchanger chamber (37).

  Each adsorption heat exchanger (51, 52) has an adsorbent supported on the surface of a so-called cross fin type fin-and-tube heat exchanger, and is a rectangular thick plate or flat rectangular parallelepiped as a whole. It is formed in a shape. Each adsorption heat exchanger (51, 52) is placed in the heat exchanger chamber (37, 38) with its front and back surfaces parallel to the upstream partition plate (71) and downstream partition plate (72). It is erected. The adsorption heat exchanger (51, 52) constitutes a humidity control means for adjusting the humidity of the air.

  In the internal space of the casing (11), the space along the front surface of the downstream partition plate (72) is partitioned vertically, and the upper portion of the vertically partitioned space is the air supply side passage ( 31), and the lower part constitutes the exhaust side passage (33).

  The upstream partition plate (71) is provided with four open / close dampers (41 to 44). Each damper (41-44) is formed in the shape of a substantially horizontally long rectangle. Specifically, in a part (upper part) facing the room air passage (32) in the upstream partition (71), the first room air damper (41) is attached to the right side of the central partition (73). The second inside air damper (42) is attached to the left side of the central partition plate (73). Moreover, in the part (lower part) which faces an external air side channel | path (34) among upstream side partition plates (71), the 1st external air side damper (43) is attached to the right side rather than a center partition plate (73), A second outside air damper (44) is attached to the left side of the central partition plate (73).

  The downstream partition plate (72) is provided with four open / close dampers (45 to 48). Each damper (45-48) is formed in the shape of a substantially horizontally long rectangle. Specifically, in the part (upper part) facing the supply side passageway (31) in the downstream partition plate (72), the first supply side damper (45) is located on the right side of the central partition plate (73). The second air supply side damper (46) is attached to the left side of the central partition plate (73). Moreover, in the part (lower part) which faces an exhaust side channel | path (33) among downstream partition plates (72), the 1st exhaust side damper (47) is attached to the right side rather than a center partition plate (73), A second exhaust side damper (48) is attached to the left side of the central partition plate (73).

  In the casing (11), the space between the air supply side passage (31) and the exhaust side passage (33) and the front panel portion (12) is divided into left and right by the partition plate (77). The space on the right side of (77) constitutes the air supply fan chamber (36), and the space on the left side of the partition plate (77) constitutes the exhaust fan chamber (35).

  The air supply fan (26) is accommodated in the air supply fan chamber (36). The exhaust fan chamber (35) accommodates an exhaust fan (25). The supply fan (26) and the exhaust fan (25) are both centrifugal multiblade fans (so-called sirocco fans). The air supply fan (26) blows out the air sucked from the downstream side partition plate (72) side to the air supply port (22). The exhaust fan (25) blows out the air sucked from the downstream partition plate (72) side to the exhaust port (21). The air supply fan (26) and the exhaust fan (25) are configured such that the rotational speed of the motor is variable and the air volume can be changed.

  The supply fan chamber (36) accommodates the compressor (53) and the four-way switching valve (54) of the refrigerant circuit (50). The compressor (53) and the four-way selector valve (54) are disposed between the air supply fan (26) and the partition plate (77) in the air supply fan chamber (36).

  The compressor (53) is composed of an inverter type compressor in which the rotation speed of the compressor motor is variable (that is, the capacity is variable). The compressor (53) is a scroll type compressor in which the fixed scroll and the movable scroll are meshed with each other, and the movable scroll eccentrically rotates with respect to the fixed scroll to compress the refrigerant.

  In the casing (11), the space between the first partition (74) and the first side panel (14) forms a first bypass passage (81). The starting end of the first bypass passage (81) communicates only with the outside air passage (34) and is blocked from the inside air passage (32). The terminal end of the first bypass passage (81) is partitioned by the partition plate (78) from the air supply side passage (31), the exhaust side passage (33), and the air supply fan chamber (36). A first bypass damper (83) is provided in a portion of the partition plate (78) facing the supply fan chamber (36).

  In the casing (11), the space between the second partition (75) and the second side panel (15) constitutes a second bypass passage (82). The starting end of the second bypass passage (82) communicates only with the inside air passage (32) and is blocked from the outside air passage (34). The terminal end of the second bypass passage (82) is partitioned by the partition plate (79) from the air supply side passage (31), the exhaust side passage (33), and the exhaust fan chamber (35). A second bypass damper (84) is provided in a portion of the partition plate (79) facing the exhaust fan chamber (35).

  In the right side view and the left side view of FIG. 2, the first bypass passage (81), the second bypass passage (82), the first bypass damper (83), and the second bypass damper (84) are shown. Is omitted.

<Configuration of refrigerant circuit>
As shown in FIG. 3, the refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion. It is a closed circuit provided with a valve (55). The refrigerant circuit (50) performs a vapor compression refrigeration cycle by circulating the filled refrigerant.

  In the refrigerant circuit (50), the compressor (53) has its discharge side connected to the first port of the four-way switching valve (54) and its suction side connected to the second port of the four-way switching valve (54). . In the refrigerant circuit (50), the first adsorption heat exchanger (51), the electric expansion valve (55), and the second adsorption heat exchanger (52) are connected from the third port of the four-way switching valve (54). They are connected in order toward the fourth port.

  The four-way switching valve (54) includes a first state (state shown in FIG. 3A) in which the first port and the third port communicate with each other, and the second port and the fourth port communicate with each other. The second port and the fourth port can communicate with each other, and the second port and the third port can communicate with each other in the second state (the state shown in FIG. 3B). In accordance with the switching of the setting of the four-way switching valve (54), the refrigerant circulation direction in the refrigerant circuit (50) is reversed. That is, the four-way selector valve (54) constitutes a refrigerant flow path switching mechanism that reversibly switches the refrigerant circulation direction. In the refrigerant circuit (50), the high pressure refrigerant flows through the first adsorption heat exchanger (51) and the low pressure refrigerant flows through the second adsorption heat exchanger (52) in accordance with the switching of the four-way switching valve (54). The operation and the operation in which the low-pressure refrigerant flows through the first adsorption heat exchanger (51) and the high-pressure refrigerant flows through the second adsorption heat exchanger (52) are alternately performed.

<Overall configuration of humidity control system>
The overall configuration of the humidity control system (1) will be described with reference to FIG. The humidity control system (1) of the present embodiment is provided with four humidity control units (10a, 10b, 10c, 10d) from first to fourth. The number of humidity control units (10) is merely an example, and any number of humidity control units (10) may be used. Each humidity control unit (10) is installed behind the ceiling of the room.

  An air supply duct (62) is connected to the air supply port (22) of each humidity control unit (10). The outflow end of each air supply duct (62) faces the room. The supply air duct (62) is configured such that supply air (SA) to the room flows through the inside thereof. An exhaust branch duct (61a) is connected to the exhaust port (21) of each humidity control unit (10). The outflow side of each exhaust branch duct (61a) joins with one main exhaust duct (61b) and faces the outside. The exhaust branch duct (61a) and the main exhaust duct (61b) constitute an exhaust duct (61) through which the exhaust air (EA) to the outside flows.

  A room air suction duct (63) is connected to each room air suction port (23) of each humidity control unit (10). The inflow end of each inside air suction duct (63) faces the room. The inside air suction duct (63) is configured such that indoor air (RA) sucked into the humidity control unit (10) flows through the inside air duct (63). An outside air intake branch duct (64a) is connected to the outside air inlet (24) of each humidity control unit (10). The inflow side of each outside air intake branch duct (64a) joins one main outside air intake duct (64b) and then faces the outside. The outside air suction branch duct (64a) and the main outside air suction duct (64b) constitute an outside air suction duct (64) through which outdoor air (OA) sucked into the humidity control unit (10) flows.

  In the humidity control system (1) of the present embodiment, the first humidity control unit (10a) and the second humidity control unit (10b) are arranged near the indoor window (W), and the third humidity control unit (10c) and The 4th humidity control unit (10d) is arrange | positioned near the wall surface (X) on the opposite side to a window (W). Accordingly, the inflow ends of the inside air suction ducts (63) of the first humidity control unit (10a) and the second humidity control unit (10b) are located in the vicinity of the window (W), and the third humidity control unit ( The inflow ends of the internal air suction ducts (63) of the 10c) and the fourth humidity control unit (10d) are located relatively far from the window (W). In other words, the inflow ends of the inside air suction ducts (63) of the first humidity control unit (10a) and the second humidity control unit (10b) are connected to the third humidity control unit (10c) and the fourth humidity control unit (10d). It is located closer to the window (W) than the inflow end of the inside air suction duct (63).

  The humidity control system (1) of the present embodiment includes one outside air temperature sensor (91) and four inside air temperature sensors (92) from first to fourth. The outside air temperature sensor (91) is provided inside the main outside air suction duct (64b). The outdoor temperature sensor (91) detects the temperature TOA of the outdoor air (OA). The first inside air temperature sensor (92a) is inside the inside air suction duct (63) of the first humidity control unit (10a), and the second inside air temperature sensor (92b) is inside the air inside the second humidity control unit (10b). Inside the duct (63), the third inside air temperature sensor (92c) is inside the inside air suction duct (63) of the third humidity control unit (10c), and the fourth inside air temperature sensor (92d) is It is provided inside the inside air suction duct (63) of the humidity unit (10d). Each room temperature sensor (92) detects the temperature TRA of the room air (RA) sucked into the corresponding humidity control unit (10).

  Moreover, the humidity control system (1) of this embodiment has one outdoor air humidity sensor (93) and four inside air humidity sensors (94) from 1st to 4th. The outside air humidity sensor (93) is provided inside the main outside air suction duct (64b). The outdoor air humidity sensor (93) detects the humidity of the outdoor air (OA). The first room air humidity sensor (94a) is inside the room air suction duct (63) of the first humidity control unit (10a), and the second room air humidity sensor (94b) is a room air suction of the second humidity control unit (10b). Inside the duct (63), the third inside air humidity sensor (94c) is inside the inside air suction duct (63) of the third humidity control unit (10c), and the fourth inside air humidity sensor (94d) is It is provided inside the inside air suction duct (63) of the humidity unit (10d). Each room air humidity sensor (94) detects the humidity of room air (RA) sucked into the corresponding humidity control unit (10). The humidity detected by the outside air humidity sensor (93) or the inside air humidity sensor (94) may be either absolute humidity or relative humidity.

  The humidity control system (1) includes a controller (95). The controller (95) includes an input unit (96), a calculation unit (97), and an air volume control unit (98). Detection values of the various sensors are input to the input unit (96).

  The calculation unit (97) constitutes a temperature difference deriving unit for deriving a temperature difference between the outside air temperature TOA detected by the outside air temperature sensor (91) and each inside air temperature TRA detected by the inside air temperature sensor (92). . Specifically, the calculation unit (97) of the present embodiment includes the temperature difference ΔT1 between the outside air temperature TOA and the temperature of the room air (inside air temperature TRA1) sucked into the first humidity control unit (10a), and the outside air temperature TOA. And the temperature difference ΔT2 between the room air temperature (inside air temperature TRA2) sucked into the second humidity control unit (10b), the outside air temperature TOA, and the temperature of the room air sucked into the third humidity control unit (10c) ( A temperature difference ΔT3 between the temperature difference ΔT3 from the room air temperature TRA3) and a temperature of room air (inside air temperature TRA4) sucked into the fourth humidity control unit (10d) is derived.

  The air volume control unit (98) is configured so that the exhaust fan of each humidity control unit (10) is based on the temperature difference ΔT1 to ΔT4 for each humidity control unit (10a, 10b, 10c, 10d) derived by the calculation unit (97). Control the air volume of (25). Details of the air volume control of the exhaust fan (25) by the air volume controller (98) will be described later.

-Driving action-
First, the independent operation of the humidity control unit (10) will be described. The humidity control unit (10) selectively performs dehumidification ventilation operation, humidification ventilation operation, and outdoor air cooling operation.

  The humidity control unit (10) during dehumidification ventilation operation and humidification ventilation operation adjusts the humidity of the taken outdoor air (OA) to the room as supply air (SA) and at the same time takes in the indoor air (RA). To the outside as exhaust air (EA). On the other hand, the humidity control unit (10) during the outdoor air cooling operation supplies the taken outdoor air (OA) to the room as supplied air (SA) as it is, and at the same time discharges the taken indoor air (RA) as it is. To be discharged outside the room.

  Also, in dehumidification ventilation operation and humidification ventilation operation, humidity control unit (10) based on the outside air temperature, each inside air temperature, outside air humidity, each inside air humidity detected by each sensor (91, 92, 93, 94) above The humidity control capacity is adjusted. In the present embodiment, the operating frequency of the compressor (53) of the refrigerant circuit (50) is adjusted based on the outside air temperature humidity and the inside air temperature humidity. Thereby, the refrigerant | coolant circulation amount in a refrigerant circuit (50) is adjusted, and the adsorption | suction capability and regeneration capability of an adsorption heat exchanger (51,52) are changed.

<Dehumidification ventilation operation>
In the humidity control unit (10) during the dehumidification / ventilation operation, a first operation and a second operation described later are alternately repeated at predetermined time intervals (intervals of 3 minutes). That is, the operation time Δt for each of the two operations in the dehumidifying ventilation operation is set to 3 minutes. During the dehumidifying ventilation operation, the first bypass damper (83) and the second bypass damper (84) are always closed.

  In the humidity control unit (10) during the dehumidification / ventilation operation, outdoor air is taken as the first air from the outside air inlet (24) into the casing (11), and indoor air is taken from the inside air inlet (23) to the casing (11). It is taken in as second air.

  First, the first operation of the dehumidifying ventilation operation will be described. As shown in FIG. 5, during the first operation, the first inside air side damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper ( 47) is opened, and the second inside air damper (42), the first outside air damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are closed. In the refrigerant circuit (50) during the first operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 3A), and the first adsorption heat exchanger (51) is condensed. The second adsorption heat exchanger (52) becomes an evaporator.

  The first air that has flowed into the outside air passage (34) and passed through the outside air filter (28) flows into the second heat exchanger chamber (38) through the second outside air damper (44), and thereafter It passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air dehumidified by the second adsorption heat exchanger (52) flows into the supply air passage (31) through the second supply air damper (46) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  On the other hand, the second air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the first heat exchanger chamber (37) through the first room air damper (41), Thereafter, it passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air given moisture in the first adsorption heat exchanger (51) flows into the exhaust side passage (33) through the first exhaust side damper (47) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  Next, the second operation of the dehumidifying ventilation operation will be described. As shown in FIG. 6, during this second operation, the second inside air side damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper ( 48) is opened, and the first inside air damper (41), second outside air damper (44), second air supply damper (46), and first exhaust damper (47) are closed. In the refrigerant circuit (50) during the second operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 3B), and the first adsorption heat exchanger (51) is evaporated. The second adsorption heat exchanger (52) becomes a condenser.

  The first air that has flowed into the outside air passage (34) and passed through the outside air filter (28) flows into the first heat exchanger chamber (37) through the first outside air damper (43), and thereafter Passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture in the first air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The first air dehumidified by the first adsorption heat exchanger (51) flows into the supply air passage (31) through the first supply air damper (45) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  On the other hand, the second air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the second heat exchanger chamber (38) through the second room air damper (42), Thereafter, it passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air given moisture in the second adsorption heat exchanger (52) flows into the exhaust side passage (33) through the second exhaust side damper (48) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

<Humidified ventilation operation>
In the humidity control unit (10) during the humidification ventilation operation, a first operation and a second operation described later are alternately repeated at predetermined time intervals (4 minute intervals). That is, the operation time Δt for each of the two operations in the humidified ventilation operation is set to 3 minutes.
During the humidification ventilation operation, the first bypass damper (83) and the second bypass damper (84) are always closed.

  In the humidity control unit (10) during the humidification ventilation operation, outdoor air is taken into the casing (11) from the outside air inlet (24) as second air, and indoor air is taken from the inside air inlet (23) to the casing (11). It is taken in as 1st air in.

  First, the 1st operation | movement of humidification ventilation operation is demonstrated. As shown in FIG. 7, during this first operation, the second inside air side damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper ( 48) is opened, and the first inside air damper (41), second outside air damper (44), second air supply damper (46), and first exhaust damper (47) are closed. In the refrigerant circuit (50) during the first operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 3A), and the first adsorption heat exchanger (51) is condensed. The second adsorption heat exchanger (52) becomes an evaporator.

  The first air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the second heat exchanger chamber (38) through the second room air damper (42), and then It passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air deprived of moisture in the second adsorption heat exchanger (52) flows into the exhaust side passage (33) through the second exhaust side damper (48) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  On the other hand, the second air that flows into the outside air passage (34) and passes through the outside air filter (28) flows into the first heat exchanger chamber (37) through the first outside air damper (43), Thereafter, it passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air humidified by the first adsorption heat exchanger (51) flows through the first air supply damper (45) into the air supply passage (31) and passes through the air supply fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  Next, the second operation of the humidification ventilation operation will be described. As shown in FIG. 8, during the second operation, the first inside air damper (41), the second outside air damper (44), the second air supply damper (46), and the first exhaust damper ( 47) is opened, and the second inside air damper (42), the first outside air damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are closed. In the refrigerant circuit (50) during the second operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 3B), and the first adsorption heat exchanger (51) is evaporated. The second adsorption heat exchanger (52) becomes a condenser.

  The first air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the first heat exchanger chamber (37) through the first room air damper (41), and then Passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture in the first air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The first air deprived of moisture by the first adsorption heat exchanger (51) flows into the exhaust side passage (33) through the first exhaust side damper (47) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  On the other hand, the second air that has flowed into the outside air passage (34) and passed through the outside air filter (28) flows into the second heat exchanger chamber (38) through the second outside air damper (44), Thereafter, it passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air humidified by the second adsorption heat exchanger (52) flows through the second supply air damper (46) into the supply air passage (31) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

<Outside air cooling operation>
The outdoor air cooling operation is an operation in which the outdoor air is introduced into the room to cool the room under conditions where the temperature of the outdoor air is relatively low, such as an intermediate period between summer and winter. The outside air cooling operation is automatically executed when a predetermined condition is satisfied during the above-described dehumidification ventilation operation and humidification ventilation operation. For example, i) the outside temperature detected by the outside temperature sensor (91) is lower than a predetermined temperature (for example, 20 ° C.), and ii) the outside temperature detected by the outside temperature sensor (91) is the inside temperature sensor ( 92) the inside air temperature detected by the inside air temperature sensor (92) is higher than the indoor target temperature (set temperature). When these at least one, or at least two, or three conditions are satisfied, the outside air cooling operation is automatically executed.

  The operation of the humidity control unit (10) during the outdoor air cooling operation will be described with reference to FIG. In the humidity control unit (10) during the outside air cooling operation, the first bypass damper (83) and the second bypass damper (84) are opened, and the first room air damper (41) and the second room air damper ( 42), a first external air damper (43), a second external air damper (44), a first air supply damper (45), a second air supply damper (46), a first exhaust air damper (47), And the 2nd exhaust side damper (48) will be in a closed state. Further, during the outside air cooling operation, the compressor (53) of the refrigerant circuit (50) is stopped.

  In the humidity control unit (10) during the outside air cooling operation, outdoor air is taken into the casing (11) from the outside air inlet (24). The outdoor air that has flowed into the outside air passage (34) through the outside air inlet (24) flows from the first bypass passage (81) through the first bypass damper (83) into the supply fan chamber (36). Then, the air is supplied into the room through the air supply port (22).

  Further, in the humidity control unit (10) during the outdoor air cooling operation, room air is taken into the casing (11) from the inside air suction port (23). The room air that has flowed into the inside air passage (32) through the inside air inlet (23) flows from the second bypass passage (82) through the second bypass damper (84) into the exhaust fan chamber (35). Then, it is discharged to the outside through the exhaust port (21).

-Control of exhaust fan during outdoor air cooling operation-
By the way, in an intermediate period when the above-described outdoor air cooling operation is performed, the occupant may open the window (W) in order to take outdoor air into the room. When the outdoor air cooling operation is performed in a state where natural ventilation is performed in this manner, the temperature distribution in the room becomes non-uniform, and there is a possibility that energy saving or comfort may be impaired.

  Specifically, for example, as shown in FIG. 12, it is assumed that the indoor window (W) is opened and outdoor air is introduced into the room. Here, in the humidity control system (1), the outdoor air cooling operation is performed in all the humidity control units (10). In this case, the outdoor air taken in from the window (W) enters the inside air suction duct (63) of the first humidity control unit (10a) and the second humidity control unit (10b) installed in the vicinity of the window (W). Just inhaled. As a result, the outdoor air taken in from the window (W) does not spread throughout the room and the temperature distribution in the room becomes non-uniform. Therefore, in the humidity control system (1) of the present embodiment, the air volume of the exhaust fan (25) is controlled as follows so that the room can be uniformly cooled in the situation where the window (W) is opened during the outdoor air cooling operation. Like to do.

  As shown in FIG. 10, when the outside air cooling operation of the humidity control system (1) is started, the outside temperature sensor (91) detects the temperature TOA of the outside air flowing through the outside air suction duct (64) in step ST1. . In step ST2, the inside air humidity sensors (92a, 92b, 92c, 92d) detect the temperatures TRA1, TRA2, TRA3, and TRA4 of the room air flowing through the inside air suction ducts (63). Next, in step ST3, the calculation unit (97) calculates temperature differences ΔT1, ΔT2, ΔT3, and ΔT4 between the outside air temperature and the inside air temperature corresponding to the humidity control units (10a, 10b, 10c, 10d). Further, the calculation unit (97) derives the decrease changes K1, K2, K3, and K4 in a predetermined time for these temperature differences ΔT1-4.

  Here, it is assumed that the window (W) is opened during the outdoor air cooling operation. In this case, the outside air taken in from the window (W) is attracted only to the first and second humidity control units (10a, 10b). For this reason, indoor air in the vicinity of the first and second humidity control units (10a, 10b) is rapidly cooled indoors. As a result, the decrease changes K1 and K2 of the temperature differences ΔT1 and ΔT2 corresponding to the first and second humidity control units (10a, 10b) are relatively large values.

  In step ST4, when the decrease changes K1 and K2 of the temperature differences ΔT1 and ΔT2 become larger than a predetermined value, the process proceeds to step ST5. In step ST5, the first and second humidity control units (10a, 10b) in which the decrease amounts K1, K2 are larger than a predetermined value are specified. In step S5, the air volume control unit (98) reduces the air volume of each exhaust fan (25) of the first and second humidity control units (10a, 10b) to a predetermined air volume that is smaller than the initial air volume. As a result, the amount of outdoor air taken in from the window (W) is sucked into the first and second humidity control units (10a, 10b). Accordingly, the amount of outdoor air taken in from the window (W) is attracted to the third and fourth humidity control units (10c, 10d). As a result, the indoor air in the vicinity of the third and fourth humidity control units (10c, 10d) is also cooled by natural ventilation, so that the temperature distribution in the room is made uniform and energy saving and comfort are improved.

-Effect of Embodiment 1-
In the first embodiment, during the outdoor air cooling operation, the temperature difference ΔT1-4 between the outside air temperature TOA detected by the outside air temperature sensor (91) and each inside air temperature TRA1-4 detected by each inside air temperature sensor (92) is calculated. When the amount of change of the temperature difference ΔT1-4 in a predetermined time is greater than a predetermined value, the exhaust amount of the exhaust fan (25) of the humidity control unit (10) in which the amount of change is greater than the predetermined value is reduced. I am doing so. Thereby, the outdoor air from the window (W) can be distributed in the vicinity of the other humidity control unit (10), and the uneven temperature distribution in the room can be eliminated.

  In the first embodiment, the outside air temperature detected by the outside air temperature sensor (91) and the inside air temperature detected by the inside air temperature sensor (92) can be used for air conditioning in each humidity control unit (10). That is, when performing the above dehumidification ventilation operation and humidification ventilation operation in each humidity control unit (10), the operation frequency of the compressor (53) is controlled based on the outside air temperature and the inside air temperature as described above. Accordingly, in the first embodiment, the outside air temperature sensor (91) and the inside air temperature sensor (92) can be shared by both the dehumidifying / humidifying ventilation operation and the outside air cooling operation, and the cost can be reduced.

<Modification of Embodiment 1>
In the first embodiment, when the decrease K of the temperature difference ΔT becomes larger than a predetermined value during the outside air cooling operation (step S4), the air volume of the exhaust fan (25) of the humidity control unit (10) corresponding thereto. (Step S5). However, when the decrease change amount K of the temperature difference ΔT becomes larger than the predetermined value in step S5, the exhaust fan (25) of the humidity control unit (10) corresponding thereto is stopped so that the exhaust air volume becomes zero. May be.

  In step S5, the air volume of the exhaust fan (25) of the humidity control unit (10) other than the humidity control unit (10) in which the decrease change amount K is larger than a predetermined value may be increased. Specifically, for example, in step S4, it is assumed that the decrease changes K1 and K2 of the temperature differences ΔT1 and ΔT2 corresponding to the first and second humidity control units (10a, 10b) are larger than a predetermined value. In this case, in step S5, the exhaust fan (25) of the first humidity control unit (10a) and the second humidity control unit (10b) whose decrease change amount is larger than a predetermined value is left as it is. The air volume control unit (98) increases the air volume of each exhaust fan (25) of the third and fourth humidity control units (10c, 10d). As a result, the outdoor air taken in from the window (W) can be attracted to the third and fourth humidity control units (10c, 10d), and the room can be uniformly and quickly cooled.

  Further, in the first embodiment, the air volume of the exhaust fan (25) is controlled using the change amount of the temperature difference ΔT between the outside air temperature TOA and the inside air temperature TRA in a predetermined time as an index. However, the air volume of the corresponding exhaust fan (25) may be controlled according to the magnitude of the temperature difference ΔT1-4 for each humidity control unit (10). Specifically, for example, when the temperature differences ΔT3 and ΔT4 in the third and fourth humidity control units (10c, 10d) are relatively large, the third humidity control unit (10c) is caused by outdoor air from the window (W). It can be determined that the vicinity of the fourth humidity control unit (10d) is not sufficiently cooled. In such a case, the air volume control unit (98) increases the air volume of each exhaust fan (25) of the third and fourth humidity control units (10c, 10d). As a result, outdoor air from the window (W) reaches the vicinity of the third and fourth humidity control units (10c, 10d), and the uneven temperature distribution in the room is eliminated.

  For example, when each temperature difference (DELTA) T in a 1st and 2nd humidity control unit (10a, 10b) is comparatively small, the 1st and 2nd humidity control unit (10a, 10b) by the outdoor air from a window (W) It can be determined that there is a possibility that the vicinity of the remaining third and fourth humidity control units (10c, 10d) may not be sufficiently cooled. Therefore, in such a case, the air volume control unit (98) reduces the air volume of each exhaust fan (25) of the first and second humidity control units (10a, 10b). As a result, outdoor air from the window (W) reaches the vicinity of the third and fourth humidity control units (10c, 10d), and the uneven temperature distribution in the room is eliminated.

<< Embodiment 2 of the Invention >>
The humidity control system (1) of the second embodiment is different from the first embodiment in the control method of the exhaust fan (25). Specifically, the calculation unit (97) of Embodiment 2 calculates the enthalpy hOA of the outdoor air based on the outside air temperature detected by the outside air temperature sensor (91) and the outside air humidity detected by the outside air humidity sensor (93). To derive. That is, the outside air temperature sensor (91), the outside air humidity sensor (93), and the calculation unit (97) constitute an outside air enthalpy deriving unit for deriving the enthalpy of outdoor air. Further, the calculation unit (97) controls each humidity control unit (10) based on each room temperature detected by the room temperature sensor (92) and each room air humidity detected by the room air humidity sensor (94). Corresponding room air enthalpy (hereinafter referred to as room air enthalpy hRA) is derived. That is, the inside air temperature sensor (92), the inside air humidity sensor (94), and the calculation unit (97) constitute an inside air enthalpy deriving unit for deriving the enthalpy for each room air sucked into each humidity control unit (10). Yes. Furthermore, the calculating part (97) comprises the enthalpy difference deriving part for deriving the difference (enthalpy difference) between the inside air enthalpy and the outside air enthalpy for each humidity control unit (10).

  During the outside air cooling operation of the humidity control system (1) of the second embodiment, the air volume of the exhaust fan (25) is controlled as follows.

  As shown in FIG. 11, when the outside air cooling operation of the humidity control system (1) is started, in step ST11, the outside air temperature detected by the outside air temperature sensor (91) and the outside air detected by the outside air humidity sensor (93). Based on the humidity, the outside air enthalpy hOA is derived. In step ST12, each room air enthalpy hRA1 based on the room temperature detected by each room temperature sensor (92a, 92b, 92c, 92d) and the room air humidity detected by each room air humidity sensor (94a, 94b, 94c, 94d). , HRA2, hRA3 and hRA4 are derived. Next, in step ST13, the calculation unit (97) calculates the enthalpy differences Δh1, Δh2, Δh3, Δh4 between the outside air enthalpy and the inside air enthalpy corresponding to each humidity control unit (10a, 10b, 10c, 10d). Further, the calculation unit (97) derives the decrease changes K1, K2, K3, and K4 in a predetermined time for these enthalpy differences Δh1-4.

  Here, it is assumed that the window (W) is opened during the outdoor air cooling operation. In this case, the outside air taken in from the window (W) is attracted only to the first and second humidity control units (10a, 10b). For this reason, indoor air in the vicinity of the first and second humidity control units (10a, 10b) is rapidly cooled indoors. As a result, the decrease changes K1 and K2 of the enthalpy differences Δh1 and Δh2 corresponding to the first and second humidity control units (10a, 10b) are relatively large values.

  In step ST14, when the decrease changes K1 and K2 of the enthalpy differences Δh1 and Δh2 become larger than a predetermined value, the process proceeds to step ST15. In step ST15, the first and second humidity control units (10a, 10b) in which the decrease amounts K1, K2 are larger than a predetermined value are specified. In step S15, the air volume control unit (98) reduces the air volume of each exhaust fan (25) of the first and second humidity control units (10a, 10b) to a predetermined air volume that is smaller than the initial air volume. As a result, the amount of outdoor air taken in from the window (W) is sucked into the first and second humidity control units (10a, 10b). Accordingly, the amount of outdoor air taken in from the window (W) is attracted to the third and fourth humidity control units (10c, 10d). As a result, the indoor air in the vicinity of the third and fourth humidity control units (10c, 10d) is also cooled by natural ventilation, so that the temperature distribution in the room is made uniform and energy saving and comfort are improved.

-Effect of Embodiment 2-
In the second embodiment, unlike the first embodiment, in consideration of the humidity of the outside air and the inside air in addition to the temperature of the outside air and the inside air, the exhaust fan (that is, the sensible heat load and the latent heat load in the room) is taken into account. 25) is controlling. For this reason, the enthalpy distribution in the room can be made uniform, and the energy saving performance in the room can be improved more effectively.

  In the second embodiment, the outside air temperature detected by the outside air temperature sensor (91), the inside air temperature detected by the inside air temperature sensor (92), the outside air humidity detected by the outside air humidity sensor (93), and the inside air humidity sensor. The inside air humidity detected in (94) can be used for air conditioning in each humidity control unit (10). That is, when performing the above dehumidification ventilation operation and humidification ventilation operation in each humidity control unit (10), the compressor (53) is operated based on the outside air temperature, the inside air temperature, the outside air humidity, and the inside air humidity as described above. The frequency is controlled. Therefore, in the second embodiment, the outside air temperature sensor (91), the inside air temperature sensor (92), the outside air humidity sensor (93), and the inside air humidity sensor (94) are used in both the normal dehumidifying / humidifying operation and the outside air cooling operation. It can be shared and cost can be reduced.

<Modification of Embodiment 2>
Also in the second embodiment, the exhaust fan (25) can be controlled in the same manner as in the modification of the first embodiment. Specifically, in the second embodiment, when the decrease change amount K of the enthalpy difference Δh becomes larger than a predetermined value during the outdoor air cooling operation (step S14), the exhaust fan of the humidity control unit (10) corresponding thereto The air volume of (25) is decreased (step S15). However, in step S15, when the decrease change amount K of the enthalpy difference Δh becomes larger than a predetermined value, the exhaust fan (25) of the humidity control unit (10) corresponding thereto is stopped so that the exhaust air volume becomes zero. May be.

  In step S15, the air volume of the exhaust fan (25) of the humidity control unit (10) other than the humidity control unit (10) in which the decrease change amount K is larger than a predetermined value may be increased. Specifically, for example, in step S14, it is assumed that the decrease changes K1 and K2 of the enthalpy differences Δh1 and Δh2 corresponding to the first and second humidity control units (10a, 10b) are larger than a predetermined value. In this case, in step S15, the exhaust fan (25) of the first humidity control unit (10a) and the second humidity control unit (10b) whose decrease change amount is larger than a predetermined value is left as it is, while the air volume control is performed. A part (98) increases the air volume of each exhaust fan (25) of 3rd and 4th humidity control units (10c, 10d) other than this. As a result, the outdoor air taken in from the window (W) can be attracted to the third and fourth humidity control units (10c, 10d), and the room can be uniformly and quickly cooled.

  Further, in the second embodiment, the air volume of the exhaust fan (25) is controlled using the change amount of the enthalpy difference Δh between the outside air enthalpy hOA and the inside air enthalpy hRA in a predetermined time as an index. However, the air volume of the corresponding exhaust fan (25) may be controlled according to the magnitude of the enthalpy difference Δh1-4 for each humidity control unit (10). Specifically, for example, when the enthalpy differences Δh3 and Δh4 in the third and fourth humidity control units (10c, 10d) are relatively large, the third humidity control unit (10c) is caused by outdoor air from the window (W). It can be determined that the vicinity of the fourth humidity control unit (10d) is not sufficiently cooled. In such a case, the air volume control unit (98) increases the air volume of each exhaust fan (25) of the third and fourth humidity control units (10c, 10d). As a result, outdoor air from the window (W) reaches the vicinity of the third and fourth humidity control units (10c, 10d), and uneven distribution of indoor temperature and enthalpy is eliminated.

  For example, when each enthalpy difference Δh in the first and second humidity control units (10a, 10b) is relatively small, the first and second humidity control units (10a, 10b) are caused by outdoor air from the window (W). It can be determined that there is a possibility that the vicinity of the remaining third and fourth humidity control units (10c, 10d) may not be sufficiently cooled. Therefore, in such a case, the air volume control unit (98) reduces the air volume of each exhaust fan (25) of the first and second humidity control units (10a, 10b). As a result, outdoor air from the window (W) reaches the vicinity of the third and fourth humidity control units (10c, 10d), and uneven distribution of indoor temperature and enthalpy is eliminated.

<< Other Embodiments >>
About each said embodiment, it is good also as the following structures.

  In the humidity control system (1) of the above embodiment, the adsorption heat exchanger (51, 52) connected to the refrigerant circuit (50) is used as humidity control means for adjusting the humidity of the air. However, the humidity control means is not limited to this, and may be another type such as a suction rotor system. Further, hot water or cold water may be used as a heat medium for heating or cooling the adsorption heat exchanger (51, 52).

  In the above embodiment, the outside air temperature sensor (91), the inside air temperature sensor (92), the outside air humidity sensor (93), and the inside air humidity sensor (94) are provided inside the duct. You may make it provide in the inside of the air path in each humidity control unit (10a, 10b, 10c, 10d).

  As described above, the present invention relates to a humidity control system that adjusts indoor humidity using a plurality of humidity control units, and is particularly useful for a humidity control system capable of cooling the outside air.

FIG. 1 is a perspective view showing a humidity control unit as viewed from the front side with a part of a casing and an electrical component box omitted. FIG. 2 is a schematic plan view, a right side view, and a left side view in which a part of the humidity control unit is omitted. FIG. 3 is a piping system diagram showing the configuration of the refrigerant circuit, in which (A) shows the first operation and (B) shows the second operation. FIG. 4 is a diagram schematically illustrating the overall configuration and air flow of the humidity control system according to the first embodiment. FIG. 5 is a schematic plan view, right side view, and left side view of the humidity control unit showing the flow of air in the first operation of the dehumidifying ventilation operation. FIG. 6 is a schematic plan view, right side view, and left side view of the humidity control unit showing the air flow in the second operation of the dehumidifying ventilation operation. FIG. 7 is a schematic plan view, right side view, and left side view of the humidity control unit showing the flow of air in the first operation of the humidification ventilation operation. FIG. 8 is a schematic plan view, right side view, and left side view of the humidity control unit showing the air flow in the second operation of the humidification ventilation operation. FIG. 9 is a schematic plan view, right side view, and left side view of the humidity control unit showing the air flow in the outside air cooling operation. FIG. 10 is a control flow of the exhaust fan during the outside air cooling operation of the humidity control system of the first embodiment. FIG. 11 is a control flow of the exhaust fan during the outdoor air cooling operation of the humidity control system of the second embodiment. FIG. 12 is a schematic configuration diagram illustrating an example of a humidity control system.

Explanation of symbols

10 Humidity control unit
25 Exhaust fan
26 Air supply fan
51,52 Adsorption heat exchanger (humidity control means)
91 Outside temperature sensor (outside air enthalpy deriving section)
92 Inside air temperature sensor (Inside air enthalpy deriving section)
93 Outside air humidity sensor (outside air enthalpy deriving section)
94 Inside air humidity sensor Inside air enthalpy deriving part)
97 Calculation unit (outside air enthalpy derivation unit, inside air enthalpy derivation unit)
98 Air flow control unit

Claims (8)

An exhaust fan (25) for sucking indoor air and discharging it to the outside, an air supply fan (26) for sucking outdoor air and supplying it to the room, and humidity control means for adjusting the humidity of the air supplied to the room (51, 52) each having a plurality of humidity control units (10), wherein the plurality of humidity control units (10) exhaust the outdoor air in the same room while discharging the indoor air to the outside. A humidity control system configured to be capable of performing outdoor air cooling operation to supply the same room without humidity control by means (51, 52),
A plurality of indoor air temperature sensors (92) for detecting the temperature of the indoor air sucked into the exhaust fan (25) for each humidity control unit (10);
An outdoor temperature sensor (91) for detecting the temperature of the outdoor air;
A temperature difference deriving unit for deriving a temperature difference between each inside air temperature detected by each inside air temperature sensor (92) and the outside air temperature detected by the outside air temperature sensor (91) for each humidity control unit (10) ( 97)
An air volume control unit (98) for controlling the air volume of the exhaust fan (25) of each humidity control unit (10) based on each temperature difference derived by the temperature difference deriving unit (97) during the outside air cooling operation. And a humidity control system. In claim 1,
The temperature difference deriving unit (97) is configured to obtain a change amount of the temperature difference for each humidity control unit (10) in a predetermined time,
The air volume control unit (98) decreases the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) when the change amount of the temperature difference of the humidity control unit (10) is larger than a predetermined value. Humidity control system characterized by. In claim 1,
The temperature difference deriving unit (97) is configured to obtain a change amount of the temperature difference for each humidity control unit (10) in a predetermined time,
When the change amount of the temperature difference of the humidity control unit (10) becomes smaller than a predetermined value, the air volume control unit (98) exhausts the exhaust fan (10) of the humidity control unit (10) other than the corresponding humidity control unit (10) 25) A humidity control system characterized by increasing the air flow. In claim 1,
The air volume control unit (98) increases the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) when the temperature difference derived by the temperature difference deriving unit (97) increases, and the temperature difference When the temperature difference derived by the derivation unit (97) is reduced, the humidity control system is characterized in that the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) is reduced. An exhaust fan (25) for sucking indoor air and discharging it to the outside, an air supply fan (26) for sucking outdoor air and supplying it to the room, and humidity control means for adjusting the humidity of the air supplied to the room (51, 52) each having a plurality of humidity control units (10), wherein the plurality of humidity control units (10) exhaust the outdoor air in the same room while discharging the indoor air to the outside. A humidity control system configured to be capable of performing outdoor air cooling operation to supply the same room without humidity control by means (51, 52),
The temperature and humidity of the indoor air sucked into the exhaust fan (25) are detected for each humidity control unit (10), and the enthalpy of the room air is derived for each humidity control unit (10) based on the temperature and humidity. Shy enthalpy deriving section (92,94,97),
An outdoor air enthalpy deriving unit (91, 93, 97) for detecting the temperature and humidity of the outdoor air and deriving the enthalpy of the outdoor air based on the temperature and humidity;
For each humidity control unit (10), the enthalpy difference between the inside air enthalpy derived by the inside air enthalpy deriving unit (92,94,97) and the outside air enthalpy derived by the outside air enthalpy deriving unit (91,93,97) Enthalpy difference deriving section (97) derived respectively in
Air volume control section (98) for controlling the air volume of the exhaust fan (25) of each humidity control unit (10) based on each enthalpy difference derived by the enthalpy difference deriving section (97) during the outside air cooling operation And a humidity control system. In claim 5,
The enthalpy difference deriving unit (97) is configured to obtain a change amount of the enthalpy difference for each humidity control unit (10) in a predetermined time,
The air volume control unit (98) reduces the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) when the amount of change in the enthalpy difference of the humidity control unit (10) exceeds a predetermined value. Humidity control system characterized by. In claim 6,
The enthalpy difference deriving unit (97) is configured to obtain a change amount of the enthalpy difference for each humidity control unit (10) in a predetermined time,
When the amount of change in the enthalpy difference of the humidity control unit (10) is smaller than a predetermined value, the air volume control unit (98) is configured to exhaust the exhaust fan (10) of the humidity control unit (10) other than the corresponding humidity control unit (10). 25) A humidity control system characterized by increasing the air flow. In claim 5,
When the enthalpy difference derived by the enthalpy difference deriving unit (97) increases, the air volume control unit (98) increases the air volume of the exhaust fan (25) of the corresponding humidity control unit (10), and the enthalpy difference When the difference in enthalpy derived by the deriving section (97) is reduced, the air conditioning system is characterized in that the air volume of the exhaust fan (25) of the corresponding humidity control unit (10) is reduced.

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