JP2010190495A - Humidity conditioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an indoor temperature from rising more than necessity during a humidifying operation with little energy, in a humidity conditioning device performing the humidifying operation to humidify the air supplied indoors by using an adsorbent. <P>SOLUTION: A heat transporting circuit (15) is provided, constituted to circulate a refrigerant between an air supply-side heat exchanger (16) exchanging heat between the supplied air passing through one of two adsorption heat exchangers (51, 52) and a refrigerant, and an exhaust-side heat exchanger (17) exchanging heat between the discharged air passing through the other of two adsorption heat exchangers (51, 52) and the refrigerant. In this humidify conditioning device (10), heat transporting operation for circulating the refrigerant to the heat transporting circuit (15) is performed so that the refrigerant circulated in the air supply-side heat exchanger (16) absorbs heat from the supplied air, and the refrigerant circulated in the exhaust-side heat exchanger (17) radiates heat to the discharged air during the humidifying operation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a humidity control apparatus that adjusts indoor humidity using an adsorbent, and particularly relates to a humidity control apparatus that performs a humidifying operation for humidifying a room.

  2. Description of the Related Art Conventionally, a humidity control apparatus that adjusts indoor humidity using an adsorbent is known. Patent Document 1 discloses a humidity control apparatus of this type that adjusts indoor humidity 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. 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; The operation in which the low-pressure refrigerant flows through the adsorption heat exchanger and the high-pressure refrigerant flows through the second adsorption heat exchanger is alternately performed.

  In the adsorption heat exchanger in 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 in which the high-pressure refrigerant flows, the adsorbent is heated and moisture is desorbed from the adsorbent and applied to the air. Thus, in each adsorption heat exchanger, the operation of adsorbing moisture and the operation of desorbing moisture 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 humidification operation, the air that has passed through the direction in which the high-pressure refrigerant flows in the first and second adsorption heat exchangers is supplied to the room, and the air that has passed through the direction in which the low-pressure refrigerant flows is discharged to the outside. In addition, an air flow path in the humidity control apparatus is set.
JP 2005-291532 A

  By the way, in the humidity control apparatus that adjusts the indoor humidity using the adsorbent, the supply air supplied to the room by the adsorbent heated to desorb moisture during the humidification operation is not limited to the humidity. The temperature also rises. And in the conventional humidity control apparatus, the supply air heated with humidification was supplied indoors as it was. Therefore, the indoor temperature may be higher than necessary. In addition, if an air conditioner is installed in the room, it is possible to suppress an increase in the temperature of the room by cooling the room with the air conditioner, but a certain amount of energy is required for cooling the room. It was.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a humidity control apparatus that performs a humidifying operation for humidifying supply air supplied to a room using an adsorbent. It is in suppressing that it becomes higher than necessary with less energy.

  According to a first aspect of the present invention, there is provided humidity control means (51, 52) provided with an adsorbent that comes into contact with supply air supplied indoors and exhaust air discharged outside the room, and the humidity control means (51, 52). Heat source means (50) which heats a part of the adsorbent provided and cools another part of the adsorbent provided in the humidity control means (51, 52). And the moisture desorbed from the adsorbent heated by the heat source means (50) is given to the supply air, and at the same time, the moisture in the exhaust air is added to the adsorbent cooled by the heat source means (50). The target is a humidity control device (10) that performs a humidifying operation that adsorbs water. The humidity control apparatus (10) includes an air supply side heat exchanger (16) for exchanging heat between the supply air that has passed through the humidity control means (51, 52) and the heat medium, and the humidity control means (51 , 52) are connected to the exhaust side heat exchanger (17) for exchanging heat between the exhaust air and the heat medium, the supply side heat exchanger (16) and the exhaust side heat exchanger (17). A heat transfer circuit (15) configured to circulate a heat medium between the air supply side heat exchanger (16) and the exhaust side heat exchanger (17), and during the humidification operation The heat transfer so that the heat medium flowing through the supply side heat exchanger (16) absorbs heat from the supply air and the heat medium flowing through the exhaust side heat exchanger (17) dissipates heat to the exhaust air. A heat transfer operation is performed to distribute the heat medium through the circuit (15).

  In the first invention, the heat transfer operation is performed during the humidifying operation. In the air supply side heat exchanger (16) during the heat transfer operation, the heat medium flowing through the air supply side heat exchanger (16) absorbs heat from the supply air heated with humidification. As a result, the temperature of the supply air heated with humidification decreases before being supplied to the room. On the other hand, in the exhaust-side heat exchanger (17) during the heat transfer operation, the heat medium flowing through the exhaust-side heat exchanger (17) radiates heat to the exhausted air that has been cooled along with dehumidification. The cold heat of the exhaust air cooled along with dehumidification is transmitted to the heat medium flowing through the exhaust side heat exchanger (17) and collected. In the first aspect of the invention, the heat medium circulates between the air supply side heat exchanger (16) and the exhaust side heat exchanger (17) in the heat transfer circuit (15). For this reason, in the heat transfer operation for cooling the supply air before being supplied to the room, the heat transfer circuit (15) performs a cycle in which the heat medium cools the supply air and collects the cold air of the exhaust air. .

  According to a second aspect of the present invention, in the first aspect of the invention, the humidity control means (51, 52) includes a first adsorption heat exchanger (51) and a second adsorption heat exchanger (both having an adsorbent on the surface). 52), and the heat source means (50) is provided with the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52), and the first adsorption heat exchanger (51). And a refrigerant circuit (50) for performing a refrigeration cycle in which one of the second adsorption heat exchangers (52) operates as a radiator and the other operates as an evaporator, and the refrigerant circuit (50) A first circuit (61) for performing a cycle, the supply side heat exchanger (16), and the exhaust side heat exchanger (17) are provided, and together with a part of the first circuit (61), the supply side A second circuit (62) that constitutes a circuit in which the refrigerant circulates between the heat exchanger (16) and the exhaust-side heat exchanger (17), and the refrigerant circulates as the heat medium. Also serves as a heat transfer circuit (15).

  In the second invention, the refrigeration cycle in which one of the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) operates as a radiator and the other operates as an evaporator includes the first circuit (61 ). The first circuit (61) is a circuit for causing adsorption and desorption of moisture in the adsorbent. On the other hand, the second circuit (62) is provided with an air supply side heat exchanger (16) and an exhaust side heat exchanger (17). The second circuit (62), together with a part of the first circuit (61), constitutes a circuit in which the refrigerant circulates between the air supply side heat exchanger (16) and the exhaust side heat exchanger (17). Yes. In this circuit, a cycle is performed in which the refrigerant cools the supply air and recovers the cold heat of the discharged air during the heat transfer operation. The second circuit (62) is a circuit for performing a cycle in which the refrigerant cools the supply air and collects the cold heat of the exhausted air during the heat transfer operation. In the second aspect of the invention, the first circuit (61) for causing the adsorbent to adsorb and desorb moisture, and the refrigerant cools the supply air during the heat transfer operation to recover the cold heat of the discharged air. A second circuit (62) for performing a cycle is provided in one refrigerant circuit (50).

  In a third aspect based on the second aspect, the first circuit (61) is provided with a pressure reducing mechanism (55) for depressurizing the refrigerant from the radiator to the evaporator, while the second circuit (62) connects between the radiator and the decompression mechanism (55) and between the decompression mechanism (55) and the evaporator.

  In 3rd invention, in the case of heat conveyance operation | movement, a part of refrigerant | coolant thermally radiated with the heat radiator flows in into a 2nd circuit (62). In the second circuit (62), when the refrigerant flows in the order of the air supply side heat exchanger (16) and the exhaust side heat exchanger (17), the heat absorption from the supply air is performed by the air supply side heat exchanger (16). The discharged refrigerant dissipates heat to the exhaust air in the exhaust side heat exchanger (17) and returns to the first circuit (61). When the refrigerant flows in the order of the exhaust side heat exchanger (17) and the supply side heat exchanger (16), the refrigerant that has radiated heat to the exhaust air in the exhaust side heat exchanger (17) is the supply side heat exchanger. In (16), heat is absorbed from the supply air and the process returns to the first circuit (61). In any case, the temperature of the refrigerant rises at the supply-side heat exchanger (16) and falls at the exhaust-side heat exchanger (17). Therefore, the temperature difference between the refrigerant that has passed through the second circuit (62) and the refrigerant in the first circuit (61) that has passed through the decompression mechanism (55) is relatively small.

  According to a fourth invention, in the second or third invention, in the second circuit (62), during the heat transfer operation, the supply side heat exchanger (16), the exhaust side heat exchanger ( The refrigerant flows in the order of 17).

  In the fourth invention, during the heat transfer operation, the refrigerant flowing into the second circuit (62) absorbs heat from the supply air in the supply side heat exchanger (16). Then, the refrigerant heated by the supply side heat exchanger (16) radiates heat to the exhaust air by the exhaust side heat exchanger (17). In this 4th invention, the refrigerant | coolant which flowed into the 2nd circuit (62) distribute | circulated from an air supply side heat exchanger (16) among an air supply side heat exchanger (16) and an exhaust side heat exchanger (17). To do.

  In a fifth aspect based on the fourth aspect, the second circuit (62) includes an upstream side pressure reducing mechanism for reducing the pressure of the refrigerant directed to the air supply side heat exchanger (16) during the heat transfer operation. (63, 64) are provided.

  In the fifth invention, the refrigerant flowing into the second circuit (62) is decompressed by the upstream decompression mechanism (63, 64) and then flows into the supply air heat exchanger (16). For this reason, the flow volume and temperature of the refrigerant | coolant which flow in into an air supply side heat exchanger (16) are adjusted by an upstream pressure reduction mechanism (63,64).

  In a sixth aspect of the present invention based on the fifth aspect, the second circuit (62) includes a downstream side pressure reducing mechanism that depressurizes the refrigerant that has passed through the exhaust side heat exchanger (17) during the heat transfer operation. (63, 64) are provided.

  In the sixth aspect of the invention, during the heat transfer operation, the refrigerant directed to the supply side heat exchanger (16) is depressurized by the upstream side depressurization mechanism (63, 64) and passes through the exhaust side heat exchanger (17). The refrigerant is decompressed by the downstream decompression mechanism (63, 64). For this reason, the pressure of the refrigerant flowing through the supply side heat exchanger (16) and the exhaust side heat exchanger (17) becomes an intermediate pressure between the high pressure and the low pressure in the refrigeration cycle.

  In a seventh aspect based on the first aspect, the heat transfer circuit (15) is configured such that the heat medium condensed in the exhaust side heat exchanger (17) flows into the supply side heat exchanger (16). The heat medium evaporated in the supply-side heat exchanger (16) flows into the exhaust-side heat exchanger (17), so that the heat medium naturally circulates.

  In the seventh invention, in the heat transfer circuit (15), the heat medium naturally circulates between the exhaust side heat exchanger (17) and the supply side heat exchanger (16). For this reason, no energy is required to circulate the heat medium.

  In the present invention, during the heat transfer operation for cooling the supply air before being supplied to the room, the heat transfer circuit (15) performs a cycle in which the heat medium cools the supply air and collects the cold air of the exhaust air. Is called. For this reason, compared with the case where the cold heat required for cooling supply air is produced separately, supply air can be cooled with less energy. Therefore, it is possible to suppress the indoor temperature from becoming higher than necessary during the humidifying operation with less energy.

  In the second aspect of the invention, the first circuit (61) for adsorbing and desorbing moisture in the adsorbent, and the refrigerant cools the supply air and cools the exhaust air during the heat transfer operation. A second circuit (62) for performing a recovery cycle is provided in one refrigerant circuit (50). According to the second aspect of the present invention, a circuit for adsorbing and desorbing moisture in the adsorbent and a cycle in which the refrigerant cools the supply air and recovers the cold air of the exhaust air during the heat transfer operation are performed. Therefore, it is possible to configure the humidity control apparatus (10) that can cool the supply air during the humidifying operation with less energy without providing a separate circuit for the purpose.

  In the third aspect of the invention, the temperature of the refrigerant flowing into the second circuit (62) rises in the supply side heat exchanger (16) and falls in the exhaust side heat exchanger (17). The temperature difference between the refrigerant that has passed through the circuit (62) and the refrigerant in the first circuit (61) that has passed through the decompression mechanism (55) is relatively small. Here, if the second circuit (62) is not provided with the exhaust-side heat exchanger (17), that is, if the cold heat is not recovered from the exhaust air, the refrigerant that has passed through the second circuit (62). Is higher than the refrigerant of the first circuit (61) that has passed through the decompression mechanism (55). For this reason, with the start of the heat transfer operation, the temperature of the refrigerant flowing into the adsorption heat exchanger (51, 52) operating as the evaporator rises. As a result, the amount of moisture adsorbed by the adsorbent of the adsorption heat exchanger (51, 52) decreases, and the amount of humidification to the supply air decreases. In contrast, in the third aspect of the invention, the temperature difference between the refrigerant that has passed through the second circuit (62) and the refrigerant in the first circuit (61) that has passed through the decompression mechanism (55) is relatively small. With the start of the heat transfer operation, the temperature of the refrigerant flowing into the adsorption heat exchanger (51, 52) operating as the evaporator does not change so much. Therefore, it is possible to cool the supply air before it is supplied to the room while maintaining the humidification amount to the supply air.

  In the fourth aspect of the invention, the refrigerant flowing into the second circuit (62) is supplied to the supply side heat exchanger (16) out of the supply side heat exchanger (16) and the exhaust side heat exchanger (17). Circulate from. Here, when the refrigerant flowing into the second circuit (62) flows from the exhaust side heat exchanger (17), the temperature of the refrigerant supplied to the supply side heat exchanger (16) is the exhaust side heat exchange. Decrease with vessel (17). For this reason, the temperature of the supply air cooled by the air supply side heat exchanger (16) becomes lower than necessary, and the supply humidified by the adsorption heat exchanger (51, 52) operating as a radiator Much of the moisture in the air may condense in the supply air heat exchanger (16). In such a case, the room cannot be sufficiently humidified. In contrast, in the fourth aspect of the invention, the refrigerant flowing into the second circuit (62) flows into the air supply side heat exchanger (16) before being cooled by the exhaust side heat exchanger (17). . Therefore, during the heat transfer operation, moisture in the supply air humidified by the adsorption heat exchanger (51, 52) that is operating as a radiator is condensed in the supply-side heat exchanger (16). Can be suppressed.

  Moreover, in the said 5th invention, the flow volume and temperature of the refrigerant | coolant which flow in into an air supply side heat exchanger (16) are adjusted by an upstream pressure reduction mechanism (63,64). That is, the cooling capacity of the refrigerant exerted in the supply air side heat exchanger (16) is adjusted by the upstream pressure reducing mechanism (63, 64). When the cooling capacity of the refrigerant exerted in the supply side heat exchanger (16) changes, the temperature of the supply air cooled by the supply side heat exchanger (16) changes. Therefore, by adjusting the upstream pressure reducing mechanism (63, 64) during the heat transfer operation, the temperature of the supply air cooled by the supply-side heat exchanger (16) is prevented from becoming unnecessarily low. be able to.

  In the sixth aspect of the invention, the pressure of the refrigerant flowing through the supply side heat exchanger (16) and the exhaust side heat exchanger (17) is set to an intermediate pressure between the high pressure and the low pressure in the refrigeration cycle. It is trying to become. For this reason, compared with the case where the pressure of the refrigerant | coolant which distribute | circulates an air supply side heat exchanger (16) and an exhaust side heat exchanger (17) becomes a low pressure pressure, an air supply side heat exchanger (16) and exhaust side heat Since the temperature of the refrigerant | coolant which distribute | circulates an exchanger (17) becomes high, it can suppress that the temperature of the supply air cooled with the supply side heat exchanger (16) becomes lower than necessary.

  In the seventh aspect of the invention, since the heat medium naturally circulates between the exhaust side heat exchanger (17) and the supply side heat exchanger (16), energy is required to circulate the heat medium. Don't be. For this reason, supply air can be cooled with much less energy.

  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
A first embodiment of the present invention will be described.

  The humidity control apparatus (10) of Embodiment 1 is the humidity control apparatus (10) according to the present invention. The humidity control device (10) is configured to adjust the humidity in the room using an adsorbent. The humidity control apparatus (10) performs a humidifying operation for imparting moisture desorbed from the adsorbent to the supply air (SA) supplied to the room. In the humidification operation, the moisture contained in the exhaust air (EA) discharged to the outside is adsorbed by the adsorbent, and the moisture is given to the supply air (SA). In addition, the humidity control apparatus (10) performs a dehumidifying operation for adsorbing moisture in the supply air (SA) to the adsorbent. In the dehumidifying operation, the adsorbent is regenerated by bringing the adsorbent that has adsorbed moisture in the supply air (SA) into contact with the exhaust air (EA).

<Configuration of humidity control device>
As shown in FIG. 1, the humidity controller (10) includes a box-shaped casing (20), a refrigerant circuit (50), and a heat transfer circuit (15). Details of the refrigerant circuit (50) and the heat transfer circuit (15) will be described later. In FIG. 1, for convenience, the refrigerant circuit (50) and the heat transfer circuit (15) are not described as being housed in the casing (20), but in actuality, the refrigerant circuit (50) and the heat transfer circuit ( 15) is accommodated in the casing (20).

  The casing (20) is formed in a rectangular parallelepiped shape that is slightly flat and relatively low in height. The casing (20) has an outside air inlet (24) for sucking air from the outside, an inside air inlet (23) for sucking air from the room, and an air supply port (22) for supplying air to the room (22) ) And an exhaust port (21) for discharging air to the outside. An outside air filter is installed inside the outside air inlet (24), and an inside air filter is installed inside the inside air inlet (23) (not shown).

  The inside of the casing (20) is divided into a plurality of partition plates (71-75), the inside air passage (32) communicating with the room through the inside air inlet (23), and the outside air side communicating with the outside through the outside air inlet (24). A passage (34), an air supply side passage (31) communicating with the room through the air supply port (22), an exhaust side passage (33) communicating with the outside through the exhaust port (21), and first adsorption heat described later A first heat exchanger chamber (37) in which the exchanger (51) is disposed and a second heat exchanger chamber (38) in which a second adsorption heat exchanger (52) described later is disposed are formed. .

  The first heat exchanger chamber (37) is formed between the outside air passage (34) and the air supply passage (31). The first heat exchanger chamber (37) is formed adjacent to the second heat exchanger chamber (38). A space between the first heat exchanger chamber (37) and the outside air passage (34) is partitioned by a first upstream partition plate (71). The first heat exchanger chamber (37) and the air supply side passage (31) are partitioned by a first downstream partition plate (72). The first heat exchanger chamber (37) and the second heat exchanger chamber (38) are partitioned by a central partition plate (73). The first upstream partition plate (71) is provided with a first counterflow damper (41) and a first crossflow damper (45). The first downstream partition plate (72) is provided with a second counterflow damper (42) and a second crossflow damper (46).

  The second heat exchanger chamber (38) is formed between the inside air side passage (32) and the exhaust side passage (33). The second heat exchanger chamber (38) and the room air side passage (32) are partitioned by a second upstream partition plate (74). The second heat exchanger chamber (38) and the exhaust side passage (33) are partitioned by a second downstream partition plate (75). The second upstream partition plate (74) is provided with a third counterflow damper (43) and a third crossflow damper (47). The second downstream partition plate (75) is provided with a fourth counterflow damper (44) and a fourth crossflow damper (48).

  Each of the counterflow dampers (41-44) and each of the crossflow dampers (45-48) is an open / close damper having a horizontally long rectangular opening. Connected to the first crossflow damper (45) is a first crossflow duct (11) whose opening communicates with the exhaust side passage (33). The second crossflow damper (46) is connected to a second crossflow duct (12) that communicates the opening with the inside air passage (32). The third crossflow damper (47) is connected to a third crossflow duct (13) whose opening communicates with the air supply side passageway (31). The fourth crossflow damper (48) is connected to a fourth crossflow duct (14) that communicates the opening with the outside air passage (34).

  The air supply side passage (31) is provided with an air supply fan (26) that blows air flowing into the air supply side passage (31) from the air supply port (22) into the room. The exhaust side passage (33) is provided with an exhaust fan (25) that blows out air that has flowed into the exhaust side passage (33) from the exhaust port (21) to the outside of the room. The supply fan (26) and the exhaust fan (25) are both centrifugal multiblade fans (so-called sirocco fans). The air supply fan (26) and the exhaust fan (25) are configured such that the amount of blown air can be changed by changing the rotational speed of the motor by inverter control.

  In the humidity control apparatus (10) of the first embodiment, the state of the air flow in the casing (20) during operation of the air supply fan (26) and the exhaust fan (25) is all the counterflow dampers (41- 44) is set to open and all crossflow dampers (45-48) are set to closed, and all counterflow dampers (41-44) are set to closed and all crossflow dampers (45-48) are set to closed. The diversion damper (45-48) can be switched to the cross-flow state that sets the open state.

  In the counterflow state, supply air (SA) supplied into the room is taken into the outside air passage (34) through the outside air inlet (24), and is supplied to the first heat exchanger chamber (41) through the first counterflow damper (41). 37). The supply air (SA) that has flowed into the first heat exchanger chamber (37) passes through the first adsorption heat exchanger (51) and then passes through the second counterflow damper (42) to the supply side passage (31 ) And blown out into the room through the air supply port (22). In the counterflow state, the exhaust air (EA) discharged outside the room is taken into the inside air passage (32) through the inside air suction port (23), and the second heat exchanger is passed through the third counterflow damper (43). Flows into the chamber (38). The exhaust air (EA) flowing into the second heat exchanger chamber (38) passes through the second adsorption heat exchanger (52) and then passes through the fourth counterflow damper (44) to the exhaust side passage (33). And then blown out through the exhaust port (21). Thus, in the counterflow state, the supply air (SA) out of the supply air (SA) and the exhaust air (EA) passes through the first adsorption heat exchanger (51), and the exhaust air (EA) is the second. Passes through the adsorption heat exchanger (52).

  On the other hand, in the crossflow state, supply air (SA) supplied into the room is taken into the outside air passage (34) through the outside air inlet (24), and the fourth crossflow duct (14) and the fourth crossflow damper are provided. It flows into the 2nd heat exchanger room (38) through (48). After the supply air (SA) flowing into the second heat exchanger chamber (38) passes through the second adsorption heat exchanger (52), the third crossflow damper (47) and the third crossflow duct ( It flows into the air supply side passageway (31) through 13) and blows out into the room through the air supply port (22). In the crossflow state, the exhaust air (EA) discharged to the outside is taken into the inside air passage (32) through the inside air suction port (23), and the second crossflow duct (12) and the second crossflow damper It flows into the first heat exchanger chamber (37) through (46). After the exhaust air (EA) flowing into the first heat exchanger chamber (37) passes through the first adsorption heat exchanger (51), the first crossflow damper (45) and the first crossflow duct ( It flows into the exhaust side passage (33) through 11) and is blown out through the exhaust port (21). Thus, in the crossflow state, the supply air (SA) out of the supply air (SA) and the exhaust air (EA) passes through the second adsorption heat exchanger (52), and the exhaust air (EA) is the first air. Passes through the adsorption heat exchanger (51).

  The humidity control device (10) is provided with a controller for controlling its operation (not shown). The controller is configured to control the refrigerant circuit (50), the fans (25, 26), and the dampers (41-48). A set temperature and set humidity set by the user using a remote controller or the like are input to the controller.

  The humidity control device (10) includes an indoor temperature sensor for detecting the indoor temperature, an indoor humidity sensor for detecting the indoor humidity, an outdoor temperature sensor for detecting the outdoor temperature, An outdoor humidity sensor for detecting outdoor humidity is provided (not shown). The indoor temperature sensor detects the temperature of the exhaust air (EA) flowing into the inside air passage (32) from the inside air suction port (23). The indoor humidity sensor detects the humidity of the exhaust air (EA) flowing into the inside air passage (32) from the inside air inlet (23). The outdoor temperature sensor detects the temperature of supply air (SA) flowing into the outside air passage (34) from the outside air inlet (24). The outdoor humidity sensor detects the humidity of the supply air (SA) flowing into the outside air passage (34) from the outside air inlet (24). The humidity detected by the inside air humidity sensor or the outside air humidity sensor may be either absolute humidity or relative humidity.

  The humidity control apparatus (10) is provided with an air supply side temperature sensor (not shown) for detecting the temperature of the supply air (SA) flowing into the air supply side passageway (31). The supply side temperature sensor detects the temperature of supply air (SA) flowing into the supply side passage (31) from the first heat exchanger chamber (37) in the counterflow state, and in the crossflow state, The temperature of supply air (SA) flowing into the air supply side passage (31) from the heat exchanger chamber (38) is detected. The air supply side temperature sensor detects the temperature of the air before flowing into the air supply side heat exchanger (16) described later.

<Configuration of refrigerant circuit>
Next, the configuration of the refrigerant circuit (50) will be described. As shown in FIG. 1, the refrigerant circuit (50) includes a compressor (53), an expansion valve (55), a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), and a four-way switching valve. (54) is a closed circuit. The refrigerant circuit (50) performs a vapor compression refrigeration cycle by circulating a filled refrigerant (for example, a chlorofluorocarbon refrigerant).

  Each adsorption heat exchanger (51, 52) has an adsorbent such as zeolite supported on the surface of a cross fin type fin-and-tube heat exchanger, and has a rectangular plate or flat shape as a whole. It is formed in a rectangular parallelepiped shape. Each adsorption heat exchanger (51, 52) has a front face and a rear face parallel to the upstream partition plate (71, 74) and the downstream partition plate (72, 75), and the heat exchanger chamber (37, 38) It is erected within. The two adsorption heat exchangers (51, 52) constitute humidity control means (51, 52) provided with an adsorbent in contact with the supply air (SA) and the exhaust air (EA).

  The compressor (53) is configured by 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 compressor in which the fixed scroll and the movable scroll are engaged with each other, and the movable scroll is eccentrically rotated with respect to the fixed scroll to compress the refrigerant. The expansion valve (55) is an electronic expansion valve with a variable opening.

  In the refrigerant circuit (50), the discharge side of the compressor (53) is connected to the first port of the four-way switching valve (54), and the suction side of the compressor (53) is connected to the first port of the four-way switching valve (54). 2 port. Further, the first adsorption heat exchanger (51), the expansion valve (55), and the second adsorption heat exchanger (52) are directed from the third port of the four-way switching valve (54) to the fourth port. Connected in order.

  The four-way selector valve (54) includes a first state (state indicated by a solid line in FIG. 1) 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 communicate with each other, and the second port and the third port communicate with each other. When the four-way selector valve (54) is switched, the refrigerant circulation direction is reversed in the refrigerant circuit (50).

  In the refrigerant circuit (50), when the four-way switching valve (54) is set to the first state, the first adsorption heat exchanger (51) operates as a condenser and the second adsorption heat exchanger (52) Operates as an evaporator. As a result, the adsorbent of the first adsorption heat exchanger (51) which is a part of the humidity control means (51, 52) is heated, and the second adsorption which is another part of the humidity control means (51, 52). The adsorbent of the heat exchanger (52) is cooled. On the other hand, when the four-way switching valve (54) is set to the second state, the second adsorption heat exchanger (52) operates as a condenser and the first adsorption heat exchanger (51) operates as an evaporator. . As a result, the adsorbent of the second adsorption heat exchanger (52) which is a part of the humidity control means (51, 52) is heated, and the first adsorption which is another part of the humidity control means (51, 52). The adsorbent of the heat exchanger (51) is cooled. The refrigerant circuit (50) heats a part of the adsorbent provided in the humidity control means (51, 52) and includes the adsorbent provided in the humidity control means (51, 52). This constitutes a heat source means (50) for cooling another part of the adsorbent.

<Configuration of heat transfer circuit>
Next, the configuration of the heat transfer circuit (15) will be described. As shown in FIG. 1, the heat transfer circuit (15) is a closed circuit provided with an air supply side heat exchanger (16), an exhaust side heat exchanger (17), and a control valve (18). In the heat transfer circuit (15), the refrigerant circulates between the air supply side heat exchanger (16) and the exhaust side heat exchanger (17). The heat transfer circuit (15) is filled with a refrigerant that changes phase in the heat transfer circuit (15) as a heat medium.

  The air supply side heat exchanger (16) is disposed in the air supply side passageway (31). The supply side heat exchanger (16) is for exchanging heat between the supply air (SA) flowing into the supply side passage (31) and the refrigerant in the heat transfer circuit (15). The air supply side heat exchanger (16) is constituted by, for example, a cross fin type fin-and-tube heat exchanger. In the supply side passage (31), the supplied supply air (SA) passes through the supply side heat exchanger (16), and is then sucked into the supply fan (26) and blown out into the room.

  On the other hand, the exhaust side heat exchanger (17) is disposed in the exhaust side passage (33). The exhaust side heat exchanger (17) is for exchanging heat between the exhaust air (EA) flowing into the exhaust side passage (33) and the refrigerant in the heat transfer circuit (15). The exhaust side heat exchanger (17) is constituted by, for example, a cross fin type fin-and-tube heat exchanger. In the exhaust side passage (33), the exhaust air (EA) that has flowed in passes through the exhaust side heat exchanger (17), and is then sucked into the exhaust fan (25) and blown out of the room. The exhaust-side heat exchanger (17) is installed at the same height as the supply-side heat exchanger (16).

  The control valve (18) is an openable / closable solenoid valve. The control valve (18) is opened and closed in response to a command from a controller described later. An electronic expansion valve with a variable opening can be used for the control valve (18).

-Driving action-
The operation of the humidity controller (10) will be described. The humidity controller (10) selectively performs a dehumidifying operation and a humidifying operation.

  In the dehumidifying operation and the humidifying operation, the humidity control capability of the humidity control apparatus (10) is adjusted based on the outside air temperature, the inside air temperature, the outside air humidity, and the inside air humidity detected by each of the sensors. In the present embodiment, the operating frequency of the compressor (53) 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.

<Dehumidifying operation>
In the dehumidifying operation, the first dehumidifying operation and the second dehumidifying operation are alternately repeated at predetermined time intervals (3 minute intervals). That is, the operation time Δt for each dehumidifying operation is set to 3 minutes.

  First, the first dehumidifying operation will be described. In the first dehumidifying operation, as shown in FIG. 2, the four-way switching valve (54) is set to the first state. In the first dehumidifying operation, all the counterflow dampers (41-44) are set in a closed state so that the air flow in the casing (20) is in a crossflow state, and all the crossflow dampers are set. (45-48) is set to the open state.

  During the first dehumidifying operation, the supply air (SA) supplied to the room is taken into the outside air passage (34) through the outside air inlet (24) and is operated as an evaporator (second adsorption heat exchanger ( Go through 52). In the second adsorption heat exchanger (52), moisture in the supply air (SA) is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. In the second adsorption heat exchanger (52), the supply air (SA) is dehumidified and cooled. The supply air (SA) that has passed through the second adsorption heat exchanger (52) flows into the supply side passage (31) and is supplied into the room from the supply port (22). On the other hand, the exhaust air (EA) discharged to the outside is taken into the inside air side passage (32) through the inside air suction port (23) and passes through the first adsorption heat exchanger (51) operating as a condenser. . 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 exhaust air (EA). In the first adsorption heat exchanger (51), the exhaust air (EA) is humidified and heated. Exhaust air (EA) that has passed through the first adsorption heat exchanger (51) flows into the exhaust side passage (33) and is discharged from the exhaust port (21) to the outside of the room.

  Next, the second dehumidifying operation will be described. As shown in FIG. 3, the four-way selector valve (54) is set to the second state. In the second dehumidifying operation, all the counterflow dampers (41-44) are set in the open state so that the air flow in the casing (20) is in the counterflow state, and all the crossflow dampers are set. (45-48) is set to the closed state.

  During the second dehumidifying operation, supply air (SA) is taken into the outside air passage (34) through the outside air inlet (24) and passes through the first adsorption heat exchanger (51) operating as an evaporator. . In the first adsorption heat exchanger (51), moisture in the supply air (SA) is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. In the first adsorption heat exchanger (51), the supply air (SA) is dehumidified and cooled. The supply air (SA) that has passed through the first adsorption heat exchanger (51) flows into the supply side passage (31) and is supplied into the room through the supply port (22). On the other hand, the exhaust air (EA) is taken into the inside air passage (32) through the inside air inlet (23) and passes through the second adsorption heat exchanger (52) operating as a condenser. 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 exhaust air (EA). In the second adsorption heat exchanger (52), the exhaust air (EA) is humidified and heated. Exhaust air (EA) that has passed through the second adsorption heat exchanger (52) flows into the exhaust side passage (33) and is discharged from the exhaust port (21) to the outside of the room.

  Thus, in both the first dehumidifying operation and the second dehumidifying operation, the adsorbent cooled by the refrigerant circuit (50) among the adsorbents of the humidity control means (51, 52) is supplied to the supply air (SA). At the same time as moisture is adsorbed, moisture desorbed from the adsorbent heated by the refrigerant circuit (50) among the adsorbents of the humidity control means (51, 52) is given to the exhaust air (EA). Whether in the first dehumidifying operation or the second dehumidifying operation, the air dehumidified by the humidity control means (51, 52) is supplied into the room.

<Humidification operation>
In the humidification operation, the first humidification operation and the second humidification operation are alternately repeated at predetermined time intervals (4 minute intervals). That is, the operation time Δt for each humidification operation is set to 4 minutes.

  First, the first humidifying operation will be described. In the first humidification operation, as shown in FIG. 4, the four-way selector valve (54) is set to the first state. In the first humidification operation, all the counterflow dampers (41-44) are set in an open state so that the air flow in the casing (20) is in the counterflow state, and all the crossflow dampers are set. (45-48) is set to the closed state.

  During the first humidification operation, the supply air (SA) is taken into the outside air passage (34) through the outside air inlet (24) and passes through the first adsorption heat exchanger (51) operating as a condenser. . 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 supply air (SA). In the first adsorption heat exchanger (51), the supply air (SA) is humidified and heated. The supply air (SA) that has passed through the first adsorption heat exchanger (51) flows into the supply side passage (31) and is supplied into the room through the supply port (22). On the other hand, the exhaust air (EA) is taken into the inside air passage (32) through the inside air inlet (23) and passes through the second adsorption heat exchanger (52) operating as an evaporator. In the second adsorption heat exchanger (52), moisture in the exhaust air (EA) is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. In the second adsorption heat exchanger (52), the exhaust air (EA) is dehumidified and cooled. Exhaust air (EA) that has passed through the second adsorption heat exchanger (52) flows into the exhaust side passage (33) and is discharged from the exhaust port (21) to the outside of the room.

  Next, the second humidifying operation will be described. As shown in FIG. 5, the four-way selector valve (54) is set to the second state. Further, in the second humidification operation, all the counterflow dampers (41-44) are set in the closed state so that the air flow in the casing (20) is in the crossflow state, and all the crossflow dampers are set. (45-48) is set to the open state.

  During the second humidification operation, the supply air (SA) is taken into the outside air passage (34) through the outside air inlet (24) and passes through the second adsorption heat exchanger (52) operating as a condenser. . 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 supply air (SA). In the second adsorption heat exchanger (52), the supply air (SA) is humidified and heated. The supply air (SA) that has passed through the second adsorption heat exchanger (52) flows into the supply side passage (31) and is supplied into the room from the supply port (22). On the other hand, the exhaust air (EA) is taken into the inside air passage (32) through the inside air inlet (23) and passes through the first adsorption heat exchanger (51) operating as an evaporator. In the first adsorption heat exchanger (51), moisture in the exhaust air (EA) is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. In the first adsorption heat exchanger (51), the exhaust air (EA) is dehumidified and cooled. Exhaust air (EA) that has passed through the first adsorption heat exchanger (51) flows into the exhaust side passage (33) and is discharged from the exhaust port (21) to the outside of the room.

  Thus, in both the first humidification operation and the second humidification operation, the moisture desorbed from the adsorbent heated by the refrigerant circuit (50) among the adsorbents of the humidity control means (51, 52) is supplied air. At the same time as (SA), moisture in the exhaust air (EA) is adsorbed to the adsorbent cooled by the refrigerant circuit (50) among the adsorbents of the humidity control means (51, 52). Whether in the first humidifying operation or the second humidifying operation, the air humidified by the humidity control means (51, 52) is supplied into the room.

  Here, the supply air (SA) rises not only in humidity but also in temperature when passing through the adsorption heat exchanger (51, 52) heated by the refrigerant. For this reason, if the supply air (SA) heated by the adsorption heat exchanger (51, 52) is supplied to the room as it is, the room temperature may become higher than necessary. For example, if the supply air (SA) heated by the adsorption heat exchanger (51, 52) is supplied to the room as it is in a room with a high internal load in winter, the room temperature rises above the set temperature. There is.

  In the present embodiment, the heat transfer circuit (15) can execute the heat transfer operation in order to suppress the indoor temperature from becoming higher than necessary. The heat transfer operation is performed when the temperature of the supply air (SA) heated by the adsorption heat exchanger (51, 52) is higher than the set temperature in the room. When the detected value of the supply side temperature sensor becomes higher than the set temperature, the controller switches the control valve (18) from the closed state to the open state, and causes the heat transfer circuit (15) to perform the heat transfer operation. The controller sets the control valve (18) in the closed state when the detected value of the supply side temperature sensor is equal to or lower than the set temperature.

  In the heat transfer circuit (15) during the humidifying operation, the supply air side heat exchanger (16) through which the supply air (SA) heated by the adsorption heat exchanger (51, 52) passes and the adsorption heat There is a temperature difference between the refrigerant and the exhaust side heat exchanger (17) through which the exhaust air (EA) at about 10 ° C. cooled by the exchanger (51, 52) passes. There is a head difference between the exhaust side heat exchanger (17) in which the condensed refrigerant is accumulated and the supply side heat exchanger (16) in which a large amount of the refrigerant is evaporated. For this reason, when the control valve (18) is set to the open state, the liquid refrigerant flowing out from the lower portion of the exhaust side heat exchanger (17) flows into the supply side heat exchanger (16), and the supply side heat The gas refrigerant flowing out from the upper part of the exchanger (16) flows into the exhaust side heat exchanger (17). In other words, in the heat transfer circuit (15), the refrigerant condensed in the exhaust side heat exchanger (17) flows into the supply side heat exchanger (16) by gravity and is evaporated in the supply side heat exchanger (16). When the gas refrigerant flows into the exhaust-side heat exchanger (17), the refrigerant naturally circulates between the supply-side heat exchanger (16) and the exhaust-side heat exchanger (17).

  Thus, in the heat transfer circuit (15), the refrigerant absorbs heat from the supply air (SA) in the supply side heat exchanger (16) and dissipates heat to the exhaust air (EA) in the exhaust side heat exchanger (17). Is done. In the supply air side heat exchanger (16), the supply air (SA) heated with humidification is cooled by the refrigerant. The temperature of the supply air (SA) decreases before being supplied into the room. On the other hand, in the exhaust-side heat exchanger (17), the refrigerant is cooled by the exhaust air (EA) that is cooled along with dehumidification. The cold heat of the exhaust air (EA) cooled along with dehumidification is transmitted to the refrigerant flowing through the exhaust side heat exchanger (17) and collected. In the heat transfer operation, the supply air (SA) is cooled by the cold heat recovered from the exhaust air (EA) that has been cooled along with dehumidification.

-Effect of Embodiment 1-
In the first embodiment, during the heat transfer operation for cooling the supply air (SA) before being supplied to the room, in the heat transfer circuit (15), the refrigerant cools the supply air (SA) and discharges air ( EA) cold recovery cycle is performed. Therefore, it is possible to cool the supply air (SA) with less energy compared to the case where the cold heat necessary for cooling the supply air (SA) is separately created. Therefore, it is possible to suppress the indoor temperature from becoming higher than necessary during the humidifying operation with less energy.

  Moreover, in the said Embodiment 1, since a refrigerant | coolant circulates naturally between an exhaust side heat exchanger (17) and an air supply side heat exchanger (16), energy is not required in order to circulate a refrigerant | coolant. For this reason, supply air can be cooled with much less energy.

<< Embodiment 2 of the Invention >>
A second embodiment of the present invention will be described. Hereinafter, differences from the first embodiment will be described.

  In the second embodiment, the refrigerant circuit (50) serving as the heat source means (50) also serves as the heat transfer circuit (15). As shown in FIG. 6, the refrigerant circuit (50) includes a first circuit (61) and a second circuit (62).

  The first circuit (61) includes a compressor (53), a first expansion valve (55), a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), and a four-way switching valve (54). Are provided. The first circuit (61) has the same configuration as the refrigerant circuit (50) of the first embodiment. In the first circuit (61), a refrigeration cycle in which one of the two adsorption heat exchangers (51, 52) is a condenser and the other is an evaporator is performed. In the second embodiment, the first expansion valve (55) constitutes a decompression mechanism (55) that decompresses the refrigerant from the radiator (51, 52) to the evaporator (51, 52).

  The second circuit (62) is provided between the first adsorption heat exchanger (51) and the first expansion valve (55) and between the first expansion valve (55) and the second adsorption heat exchanger (52). Connected. A supply side heat exchanger (16) and an exhaust side heat exchanger (17) are connected to the second circuit (62). The second circuit (62), together with a part of the first circuit (61), constitutes a circuit in which the refrigerant circulates between the air supply side heat exchanger (16) and the exhaust side heat exchanger (17). Yes. In this circuit, a cycle is performed in which the refrigerant cools the supply air (SA) and recovers the cold air of the exhaust air (EA) during the heat transfer operation.

  Specifically, the second circuit (62) is provided with a bridge circuit (65) in which four check valves (CV-1, CV-2, CV-3, CV-4) are connected in a bridge shape. ing. In the bridge circuit (65), the first circuit (61) is connected to the first connection portion (65a) on the inflow side of the first check valve (CV-1) and the outflow side of the second check valve (CV-2). ) Is connected to a first pipe (62a) extending from between the first adsorption heat exchanger (51) and the first expansion valve (55). The second connection heat (65b) on the inflow side of the third check valve (CV-3) and the outflow side of the fourth check valve (CV-4) has a second adsorption heat in the first circuit (61). A second pipe (62b) extending from between the exchanger (52) and the first expansion valve (55) is connected. The third connection part (65c) on the outflow side of the first check valve (CV-1) and the outflow side of the third check valve (CV-3) and the inflow of the second check valve (CV-2) The third pipe (62c) is connected between the side and the fourth connection portion (65d) on the inflow side of the fourth check valve (CV-4). The third pipe (62c) has an air supply side heat exchanger (16) and an exhaust side heat exchanger (17) in order from the third connection part (65c) to the fourth connection part (65d). It is connected.

  The first pipe (62a) is provided with a second expansion valve (63) constituted by an electronic expansion valve having a variable opening. The second pipe (62b) is provided with a third expansion valve (64) constituted by an electronic expansion valve having a variable opening.

-Driving action-
The humidity control apparatus (10) of the second embodiment selectively performs the dehumidifying operation and the humidifying operation as in the first embodiment. The operation of the humidity controller (10) during the dehumidifying operation and the operation of the humidity controller (10) during the humidifying operation are basically the same as those in the first embodiment. However, the heat transfer operation during the humidifying operation is different from that of the first embodiment. Hereinafter, the heat transfer operation will be described.

  The controller switches both the second expansion valve (63) and the third expansion valve (64) from the closed state to the open state when the detected value of the supply side temperature sensor becomes higher than the set temperature, and the refrigerant circuit ( 50) Make the heat transfer operation. The controller sets the control valve (18) to the closed state for both the second expansion valve (63) and the third expansion valve (64) when the detected value of the supply side temperature sensor is below the set temperature. .

  When the second expansion valve (63) and the third expansion valve (64) are set in the open state, the second circuit (62) includes a first adsorption heat exchanger (51) and a second adsorption heat exchanger ( 52) A part of the refrigerant radiated by the adsorption heat exchanger (51, 52) operating as the condenser flows in. In the second circuit (62), the refrigerant whose pressure has been reduced in one of the second expansion valve (63) and the third expansion valve (64) has absorbed heat from the supply air (SA) in the supply air side heat exchanger (16). Later, the exhaust side heat exchanger (17) dissipates heat to the exhaust air (EA), and the pressure is reduced at the other of the second expansion valve (63) and the third expansion valve (64). The refrigerant that has passed through the second circuit (62) returns to the first circuit (61) and operates as an evaporator of the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52). It passes through one of the adsorption heat exchangers (51, 52) and is sucked into the compressor (53). The refrigerant discharged from the compressor (53) again passes through the adsorption heat exchanger (51, 52) operating as a condenser, and a part thereof flows into the second circuit (62).

  In this way, in the refrigerant circuit (50), a part of the first circuit (61) and the second circuit (62) provide a space between the supply side heat exchanger (16) and the exhaust side heat exchanger (17). A circuit in which the refrigerant circulates is configured. In this circuit, a cycle is performed in which the refrigerant absorbs heat from the supply air (SA) in the supply side heat exchanger (16) and dissipates heat to the exhaust air (EA) in the exhaust side heat exchanger (17).

  Specifically, during the first humidification operation, as shown in FIG. 6, a part of the refrigerant radiated by the first adsorption heat exchanger (51) operating as a condenser is transferred to the second circuit (62). The pressure is reduced to an intermediate pressure between the high pressure and the low pressure in the refrigeration cycle by the second expansion valve (63) constituting the upstream pressure reducing mechanism (63). The refrigerant decompressed by the second expansion valve (63) passes through the first check valve (CV-1) and flows into the supply-side heat exchanger (16). In the supply-side heat exchanger (16), the refrigerant that has flowed in absorbs heat from the supply air (SA), and the supply air (SA) heated with humidification is cooled by the refrigerant. As a result, the temperature of the supply air (SA) decreases before being supplied into the room.

  The refrigerant that has passed through the supply-side heat exchanger (16) flows into the exhaust-side heat exchanger (17). In the exhaust side heat exchanger (17), the refrigerant radiates heat to the exhaust air (EA). The refrigerant is cooled by exhaust air (EA) that has been cooled along with dehumidification. As a result, the cold heat of the exhaust air (EA) cooled along with dehumidification is transmitted to the refrigerant flowing through the exhaust side heat exchanger (17) and collected. The refrigerant that has passed through the exhaust side heat exchanger (17) passes through the fourth check valve (CV-4), and then passes through the third expansion valve (64) that constitutes the downstream pressure reducing mechanism (64) in the refrigeration cycle. The pressure is reduced to a low pressure and flows into the first circuit (61). In the first circuit (61), the refrigerant passing through the second circuit (62) and the refrigerant decompressed by the first expansion valve (55) merge. The merged refrigerant evaporates in the second adsorption heat exchanger (52) operating as an evaporator.

  On the other hand, during the second humidification operation, as shown in FIG. 7, a part of the refrigerant radiated by the second adsorption heat exchanger (52) operating as a condenser flows into the second circuit (62). Then, the pressure is reduced to the intermediate pressure in the refrigeration cycle by the third expansion valve (64) constituting the upstream pressure reducing mechanism (64). The refrigerant decompressed by the third expansion valve (64) passes through the third check valve (CV-3) and flows into the supply-side heat exchanger (16). In the supply-side heat exchanger (16), the refrigerant that has flowed in absorbs heat from the supply air (SA), and the supply air (SA) heated with humidification is cooled by the refrigerant. As a result, the temperature of the supply air (SA) decreases before being supplied into the room.

  The refrigerant that has passed through the supply-side heat exchanger (16) flows into the exhaust-side heat exchanger (17). In the exhaust side heat exchanger (17), the refrigerant radiates heat to the exhaust air (EA). The refrigerant is cooled by exhaust air (EA) that has been cooled along with dehumidification. As a result, the cold heat of the exhaust air (EA) cooled along with dehumidification is transmitted to the refrigerant flowing through the exhaust side heat exchanger (17) and collected. The refrigerant that has passed through the exhaust-side heat exchanger (17) passes through the second check valve (CV-2), and then passes through the second expansion valve (63) that constitutes the downstream pressure reducing mechanism (63) in the refrigeration cycle. The pressure is reduced to a low pressure and flows into the first circuit (61). In the first circuit (61), the refrigerant passing through the second circuit (62) and the refrigerant decompressed by the first expansion valve (55) merge. The merged refrigerant evaporates in the first adsorption heat exchanger (51) operating as an evaporator.

-Effect of Embodiment 2-
In the second embodiment, during the heat transfer operation for cooling the supply air (SA) before being supplied to the room, in the refrigerant circuit (50), the refrigerant cools the supply air (SA) and discharges air (EA ) To recover the cold heat. Therefore, it is possible to cool the supply air (SA) with less energy compared to the case where the cold heat necessary for cooling the supply air (SA) is separately created. Therefore, it is possible to suppress the indoor temperature from becoming higher than necessary during the humidifying operation with less energy.

  In the second embodiment, the first circuit (61) for causing the adsorbent to adsorb and desorb moisture, and the refrigerant cools the supply air (SA) during the heat transfer operation to discharge the air (SA One refrigerant circuit (50) is provided with a second circuit (62) for performing a cycle for recovering the cold heat of (EA). According to the second embodiment, a circuit for adsorbing and desorbing moisture in the adsorbent, and the refrigerant cools the supply air (SA) and cools the exhaust air (EA) during the heat transfer operation. It is possible to configure the humidity control apparatus (10) that can cool the supply air (SA) during the humidifying operation with less energy without separately providing a circuit for performing the recovery cycle.

  In the second embodiment, the temperature of the refrigerant flowing into the second circuit (62) rises in the supply side heat exchanger (16) and decreases in the exhaust side heat exchanger (17). The temperature difference between the refrigerant that has passed through (62) and the refrigerant in the first circuit (61) that has passed through the decompression mechanism (55) becomes relatively small. Here, if the second circuit (62) is not provided with the exhaust-side heat exchanger (17), that is, if cold heat is not recovered from the exhaust air (EA), the second circuit (62) is The temperature of the refrigerant that has passed is higher than that of the refrigerant in the first circuit (61) that has passed through the decompression mechanism (55). For this reason, with the start of the heat transfer operation, the temperature of the refrigerant flowing into the adsorption heat exchanger (51, 52) operating as the evaporator rises. As a result, the amount of moisture adsorbed by the adsorbent of the adsorption heat exchanger (51, 52) decreases, and the amount of humidification to the supply air decreases. In contrast, in the second embodiment, the temperature difference between the refrigerant that has passed through the second circuit (62) and the refrigerant in the first circuit (61) that has passed through the decompression mechanism (55) is relatively small. With the start of the heat transfer operation, the temperature of the refrigerant flowing into the adsorption heat exchanger (51, 52) operating as the evaporator does not change so much. Therefore, it is possible to cool the supply air before it is supplied to the room while maintaining the humidification amount to the supply air.

  Moreover, in the said Embodiment 2, the refrigerant | coolant which flowed into the 2nd circuit (62) is from an air supply side heat exchanger (16) among an air supply side heat exchanger (16) and an exhaust side heat exchanger (17). Circulate. Here, when the refrigerant flowing into the second circuit (62) flows from the exhaust side heat exchanger (17), the temperature of the refrigerant supplied to the supply side heat exchanger (16) is the exhaust side heat exchange. Decrease with vessel (17). For this reason, the temperature of the supply air (SA) cooled by the supply-side heat exchanger (16) becomes lower than necessary, and humidification is performed by the adsorption heat exchanger (51, 52) that is operating as a radiator. Much of the water in the supplied supply air (SA) may be condensed in the supply side heat exchanger (16). In such a case, the room cannot be sufficiently humidified. On the other hand, in Embodiment 2 described above, the refrigerant that has flowed into the second circuit (62) flows into the supply-side heat exchanger (16) before being cooled by the exhaust-side heat exchanger (17). Therefore, during the heat transfer operation, moisture in the supply air (SA) humidified by the adsorption heat exchanger (51, 52) that is operating as a radiator is transferred to the supply-side heat exchanger (16). Condensation can be suppressed.

  Moreover, in the said Embodiment 2, the flow volume and temperature of the refrigerant | coolant which flow in into an air supply side heat exchanger (16) are adjusted with an upstream pressure reduction mechanism (63,64). That is, the cooling capacity of the refrigerant exerted in the supply air side heat exchanger (16) is adjusted by the upstream pressure reducing mechanism (63, 64). When the cooling capacity of the refrigerant exerted on the supply side heat exchanger (16) changes, the temperature of the supply air (SA) cooled by the supply side heat exchanger (16) changes. Therefore, by adjusting the upstream pressure reducing mechanism (63, 64) during the heat transfer operation, the temperature of the supply air (SA) cooled by the air supply side heat exchanger (16) becomes lower than necessary. Can be suppressed.

  Moreover, in the said Embodiment 2, the pressure of the refrigerant | coolant which distribute | circulates an air supply side heat exchanger (16) and an exhaust side heat exchanger (17) becomes an intermediate pressure between the high pressure in a refrigeration cycle, and a low pressure. I am doing so. For this reason, compared with the case where the pressure of the refrigerant | coolant which distribute | circulates an air supply side heat exchanger (16) and an exhaust side heat exchanger (17) becomes a low pressure pressure, an air supply side heat exchanger (16) and exhaust side heat Since the temperature of the refrigerant | coolant which distribute | circulates an exchanger (17) becomes high, it can suppress that the temperature of the supply air (SA) cooled with the supply side heat exchanger (16) becomes lower than necessary.

-Modification of Embodiment 2-
In the second embodiment, the controller uses the second expansion valve (in order to prevent or suppress moisture in the supply air (SA) from condensing in the supply-side heat exchanger (16) during the heat transfer operation. The refrigerant flow rate of the second circuit (62) may be controlled by adjusting the opening degree of at least one of the third expansion valve (63) and the third expansion valve (64). Further, in order for the controller to prevent or suppress moisture in the supply air (SA) from condensing in the supply side heat exchanger (16) during the heat transfer operation, the second expansion valve (63) is opened. The temperature of the refrigerant flowing into the supply-side heat exchanger (16) may be controlled by adjusting the degree.

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

  About the said embodiment, the humidity control means may be comprised by the adsorption | suction rotor by which the adsorption agent was carry | supported on the surface. The adsorption rotor is formed in a disk shape, and air can pass through in the thickness direction. The adsorption rotor is provided across an air supply passage through which supply air (SA) flows and an exhaust passage through which exhaust air (EA) flows. During the humidifying operation, the adsorption rotor is rotated. In the adsorption rotor during the humidification operation, the supply air (SA) heated by the condenser of the refrigerant circuit (50) serving as the heat source means (50) passes through the exhaust passage and passes through the exhaust passage. Exhaust air (EA) cooled by the evaporator of the refrigerant circuit (50) passes through the part.

  Moreover, about the said embodiment, the two adsorption | suction elements which comprise a humidity control means may be a different body from the condenser and evaporator of the refrigerant circuit (50) used as a heat-source means (50). Each of the two adsorbing elements is configured by a plate-like member in which an adsorbent is supported on the surface and air can pass through in the thickness direction. During the humidification operation, the first humidifying operation in which the supply air (SA) heated by the condenser passes through the first adsorption element and the exhaust air (EA) cooled by the evaporator passes through the second adsorption element; The second humidification operation in which the supply air (SA) heated by the condenser passes through the second adsorption element and the exhaust air (EA) cooled by the evaporator passes through the first adsorption element alternately is repeated. It is.

  In the above embodiment, the refrigerant circuit (50) may be configured to perform a supercritical cycle in which the high pressure of the refrigeration cycle is set to a value higher than the critical pressure of the refrigerant. In this case, in a normal refrigeration cycle in which the high pressure of the refrigeration cycle is set to a value lower than the critical pressure of the refrigerant, a heat exchanger that serves as a condenser operates as a gas cooler. For example, carbon dioxide is used as the refrigerant.

  In the above embodiment, the heat source means (50) heats a part of the adsorbent provided in the humidity control means (51, 52), and the humidity control means (51, 52). And a cooling device that cools another part of the adsorbent among the adsorbents provided in (), and the heating device and the cooling device may be separate.

  As described above, the present invention relates to a humidity control apparatus that adjusts indoor humidity, and is particularly useful for a humidity control apparatus that performs a humidification operation in which outdoor air is humidified and supplied to the room.

FIG. 1 is a schematic configuration diagram of a humidity control apparatus according to the first embodiment. FIG. 2 is a schematic configuration diagram during a first dehumidifying operation in the humidity control apparatus of the first embodiment. FIG. 3 is a schematic configuration diagram at the time of a second dehumidifying operation in the humidity control apparatus of the first embodiment. FIG. 4 is a schematic configuration diagram during a first humidifying operation in the humidity control apparatus of the first embodiment. FIG. 5 is a schematic configuration diagram at the time of a second humidifying operation in the humidity control apparatus of the first embodiment. FIG. 6 is a schematic configuration diagram during a first humidifying operation in the humidity control apparatus of the second embodiment. FIG. 7 is a schematic configuration diagram at the time of a second humidifying operation in the humidity control apparatus of the second embodiment.

10 Humidity control device
15 Heat transfer circuit
16 Supply side heat exchanger
17 Exhaust side heat exchanger
18 Control valve
21 Exhaust vent
22 Air supply port
23 Inside air inlet
24 Outside air inlet
50 Refrigerant circuit (heat source means)
51,52 Adsorption heat exchanger (humidity control means)
53 Compressor
55 Expansion valve

Claims (7)

Humidity control means (51, 52) provided with an adsorbent that comes into contact with the supply air supplied to the room and the exhaust air discharged to the outside;
While heating a part of the adsorbent provided in the humidity control means (51, 52), another part of the adsorbent provided in the humidity control means (51, 52) Heat source means (50) for cooling the adsorbent of
Humidification operation in which moisture desorbed from the adsorbent heated by the heat source means (50) is applied to the supply air, and at the same time, the adsorbent cooled by the heat source means (50) adsorbs moisture in the exhaust air. A humidity control device for performing
An air supply side heat exchanger (16) for exchanging heat between the supply air that has passed through the humidity control means (51, 52) and the heat medium;
An exhaust side heat exchanger (17) for exchanging heat between the exhaust air passing through the humidity control means (51, 52) and the heat medium;
The supply side heat exchanger (16) and the exhaust side heat exchanger (17) are connected, and heat is supplied between the supply side heat exchanger (16) and the exhaust side heat exchanger (17). A heat transfer circuit (15) configured to circulate the medium,
During the humidification operation, the heat medium flowing through the supply side heat exchanger (16) absorbs heat from the supply air, and the heat medium flowing through the exhaust side heat exchanger (17) dissipates heat to the exhaust air. As described above, the humidity control apparatus performs a heat transfer operation for circulating a heat medium through the heat transfer circuit (15). In claim 1,
The humidity control means (51, 52) has a first adsorption heat exchanger (51) and a second adsorption heat exchanger (52) each having an adsorbent on its surface,
The heat source means (50) includes the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52), and the first adsorption heat exchanger (51) and the second adsorption heat. It is constituted by a refrigerant circuit (50) that performs a refrigeration cycle in which one of the exchangers (52) operates as a radiator and the other operates as an evaporator,
The refrigerant circuit (50) includes a first circuit (61) for performing the refrigeration cycle, the supply-side heat exchanger (16), and the exhaust-side heat exchanger (17), and the first circuit ( 61) and a second circuit (62) constituting a circuit in which a refrigerant circulates between the supply-side heat exchanger (16) and the exhaust-side heat exchanger (17), A humidity control apparatus that also serves as a heat transfer circuit (15) through which a refrigerant circulates as a medium. In claim 2,
The first circuit (61) is provided with a decompression mechanism (55) for decompressing the refrigerant from the radiator to the evaporator,
The humidity control apparatus, wherein the second circuit (62) connects between the radiator and the decompression mechanism (55) and between the decompression mechanism (55) and the evaporator. In claim 2 or 3,
In the second circuit (62), the refrigerant is circulated in the order of the air supply side heat exchanger (16) and the exhaust side heat exchanger (17) during the heat transfer operation. apparatus. In claim 4,
The second circuit (62) is provided with an upstream pressure reducing mechanism (63, 64) for reducing the pressure of the refrigerant heading to the supply air heat exchanger (16) during the heat transfer operation. Humidity control device. In claim 5,
The second circuit (62) is provided with a downstream pressure reducing mechanism (63, 64) for reducing the pressure of the refrigerant that has passed through the exhaust side heat exchanger (17) during the heat transfer operation. Humidity control device. In claim 1,
In the heat transfer circuit (15), the heat medium condensed in the exhaust side heat exchanger (17) flows into the supply side heat exchanger (16) and is evaporated in the supply side heat exchanger (16). The humidity control apparatus is configured so that the heat medium naturally circulates when the heat medium flows into the exhaust-side heat exchanger (17).

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