JP2013064554A - Humidity controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a humidity controller which can efficiently use solar heat and has a simplified configuration.SOLUTION: In a humidity controller as a target which has an absorbent circuit (15) to which a humidity control part (45a) disposed in an air supply passage (31) for supplying air into a room and a humidity control part (45b) disposed in an exhaust passage (32) for exhausting air to the outside of the room are connected, and in which the liquid absorbent circulates so that one of both humidity control parts (45a, 45b) releases humidity and the other absorbs humidity, the absorbent circuit (15) is characteristically connected with a solar light heat collector (18) for using solar light heat to heat the liquid absorbent having flown out from the humidity control parts (45a, 45b) and supplied to the humidity control part (45a, 45b) of a humidity releasing side.

Description

  The present invention relates to a humidity control apparatus that adjusts the humidity of air with a liquid absorbent.

  Conventionally, a humidity control device using solar heat is known. For example, Patent Document 1 is supplied with a solar heat collector (solar collector), a heat storage tank for storing hot water heated by the solar collector, and hot water in the heat storage tank. A dehumidified dry air production system (humidity control device) including a heat transfer coil is disclosed. In this humidity control apparatus, the low concentration liquid absorbent is heated and regenerated by the heat transfer coil. And the water vapor | steam in the air contained in the space used as a dehumidification object is absorbed by the reproduced | regenerated high concentration liquid absorbent. Thereby, the space to be dehumidified is dehumidified.

JP 60-212207 A

  By the way, in the said patent document 1, since the liquid absorbent is heated by heat-exchanging the warm water heated with sunlight with the liquid absorbent, heat loss will generate | occur | produce in the case of heat exchange. Moreover, since a hot water circulation circuit is required to heat the liquid absorbent, the overall structure of the apparatus is increased.

  This invention is made | formed in view of this point, The objective is to provide the humidity control apparatus of the structure which can utilize solar heat efficiently and was simplified.

  The first invention is a humidity control section (45a) disposed in an air supply passage (31) for supplying air into the room and a humidity control section (45b) disposed in an exhaust passage (32) for discharging air to the outside of the room. ) And a humidity control device equipped with an absorbent circuit (15) through which the liquid absorbent circulates so that one of the humidity control sections (45a, 45b) of both of them radiates and the other absorbs moisture In the absorbent circuit (15), the liquid absorbent that flows out from the moisture adjustment section (45a, 45b) on the moisture absorption side and is supplied to the humidity adjustment section (45a, 45b) on the moisture release side is supplied with the heat of sunlight. The solar heat collector (18) which heats using is connected, It is characterized by the above-mentioned.

  In the first invention, the liquid absorbent circulates in the absorbent circuit (15), so that the humidity control section (45a) disposed in the air supply passage (31) performs one of moisture absorption and moisture release, and the exhaust passage. The humidity control section (45b) arranged in (32) performs the other of moisture absorption and moisture release. When the air supply side humidity control section (45a) absorbs moisture, the supply air is dehumidified, and when the air supply side humidity control section (45b) releases air, the supply air is humidified.

  In the first aspect of the invention, the liquid absorbent that has been released into the air by the moisture control section (45a, 45b) on the moisture release side becomes a high concentration by moisture release and is supplied to the humidity control section (45a, 45b) on the moisture absorption side. The In the humidity adjustment section (45a, 45b) on the moisture absorption side, the high concentration liquid absorbent absorbs moisture from the air. When this humidity control part is the humidity control part (45a) on the supply side, the supply air is dehumidified. When this humidity control part is the humidity control part (45b) on the exhaust side, the air absorbed by the liquid absorbent It is discharged outside. The liquid absorbent that has absorbed moisture from the air has a low concentration and is supplied again to the humidity control section (45a, 45b) on the moisture release side.

  On the other hand, the liquid absorbent that has flowed out of the moisture-control part (45a, 45b) on the moisture absorption side is supplied to the humidity control part (45a, 45b) on the moisture release side. At this time, the liquid absorbent is heated by the solar heat collector (18), so that the water vapor partial pressure rises. The liquid absorbent whose water vapor partial pressure has increased is dehumidified by the humidity adjusting section (45a, 45b) on the moisture release side. When this humidity control section is the humidity control section (45a) on the supply side, the supply air is humidified. When this humidity control section is the humidity control section (45b) on the exhaust side, the moisture released from the liquid absorbent Is discharged to the outside along with the exhaust.

  According to a second aspect of the present invention, in the first aspect of the present invention, a heating unit that heats the liquid absorbent that flows out of the solar heat collector (18) and is supplied to the humidity control unit (45a, 45b) on the moisture release side ( 44, 46a, 46b).

  In the second invention, the liquid absorbent supplied to the humidity control section (45a, 45b) on the moisture release side is heated by the solar heat collector (18), and then the heating section (44, 46a, 46b). Is heated.

  According to a third aspect, in the second aspect, the air supply side heat exchange part (46a) for exchanging heat between the liquid absorbent and the refrigerant in the humidity adjustment part (45a) on the air supply passage side, and the air passage side control An exhaust side heat exchange part (46b) for exchanging heat between the liquid absorbent and the refrigerant in the wet part (45b) is connected, and one of the supply side heat exchange part (46a) and the exhaust side heat exchange part (46b) The circulation direction of the refrigerant is reversibly configured so that it becomes a heat radiating part as the heating part and the other is an evaporation part that cools the liquid absorbent supplied to the humidity adjusting part (45a, 45b) on the moisture absorption side. A refrigerant circuit (35) is provided, and the absorbent circuit (15) is provided with a switching section (17) for switching the circulation direction of the liquid absorbent.

  In the third invention, the air supply side heat exchange part (46a) becomes the evaporation part (46a, 46b) and the exhaust side heat exchange part (46b) becomes the heat radiation part (46a, 46b) as the heating part. When the circulation direction of the refrigerant in the refrigerant circuit (35) is switched, the humidity control device is configured such that the humidity adjustment part (45a) on the air supply passage side becomes the moisture absorption side and the humidity adjustment part (45b) on the exhaust passage side becomes the moisture release side. Perform dehumidifying operation. During this dehumidifying operation, the liquid absorbent flows so that the liquid absorbent flows from the solar heat collector (18) toward the humidity control section on the moisture release side (that is, the humidity control section (45b) on the exhaust passage side). Is switched by the switching unit (17), so that the liquid absorbent heated by the solar heat collector (18) is supplied to the humidity control unit on the moisture release side.

  On the other hand, the refrigerant flow in the refrigerant circuit (35) is such that the air supply side heat exchange section (46a) becomes a heat radiating section (46a, 46b) and the exhaust side heat exchange section (46b) becomes an evaporation section (46a, 46b). When the circulation direction is switched, the humidity control apparatus performs a humidification operation in which the humidity control section (45a) on the air supply passage side becomes the moisture release side and the humidity control section (45b) on the exhaust passage side becomes the moisture absorption side. During this humidification operation, the liquid absorbent absorbs liquid so that the liquid absorbent flows from the solar heat collector (18) toward the humidity control section on the moisture release side (that is, the humidity control section (45a) on the air supply passage side). By switching the circulation path of the agent by the switching unit (17), the liquid absorbent heated by the solar heat collector (18) is supplied to the moisture adjusting unit (45a) on the moisture release side.

  According to a fourth invention, in the second invention, an air supply side heat exchange section (46a) for exchanging heat between the liquid absorbent and the refrigerant in the humidity adjustment section (45a) on the air supply path side, and an adjustment on the exhaust passage side. An exhaust side heat exchange part (46b) for exchanging heat between the liquid absorbent and the refrigerant in the wet part (45b) is connected, and one of the supply side heat exchange part (46a) and the exhaust side heat exchange part (46b) The circulation direction of the refrigerant is reversibly configured so that it becomes a heat radiating part as the heating part and the other is an evaporation part that cools the liquid absorbent supplied to the humidity adjusting part (45a, 45b) on the moisture absorption side. A refrigerant circuit (35) is provided, and the absorbent circuit (15) includes a circulation pump (16) that circulates the liquid absorbent in one direction and a heat collector connected in parallel with the solar heat collector (18). And a vessel bypass flow path (22).

  In the fourth invention, as in the case of the third invention, the supply-side heat exchange section (46a) serves as the evaporation section (46a, 46b) and the exhaust-side heat exchange section (46b) serves as the heat radiation section (the heating section). 46a, 46b), when the refrigerant circulation direction in the refrigerant circuit (35) is switched, the humidity control device has the humidity control section (45a) on the air supply passage side becomes the moisture absorption side, and the humidity control section on the exhaust passage side (45b) performs dehumidification operation on the moisture release side.

  In the absorbent circuit (15) during this dehumidifying operation, the circulation direction of the liquid absorbent by the circulation pump (16) is the solar heat collection from the humidity adjustment part on the moisture absorption side (humidity adjustment part on the air supply side (45a)). In the case of the direction toward the chamber (18), the liquid absorbent heated by the solar heat collector (18) can be supplied to the moisture conditioning section on the moisture release side (humidity conditioning section (45b) on the exhaust side). On the other hand, if the circulation direction of the liquid absorbent by the circulation pump (16) is the direction from the humidity control section on the moisture release side (humidity control section on the exhaust side (45b)) to the solar collector (18), liquid The liquid absorbent is passed through the heat collector bypass flow path (the heat collector bypass flow path ( 22).

  In addition, the refrigerant flow in the refrigerant circuit (35) is such that the air supply side heat exchange section (46a) becomes a heat radiating section (46a, 46b) and the exhaust side heat exchange section (46b) becomes an evaporation section (46a, 46b). When the circulation direction is switched, the humidity control apparatus performs a humidification operation in which the humidity control section (45a) on the air supply passage side becomes the moisture release side and the humidity control section (45b) on the exhaust passage side becomes the moisture absorption side.

  In the absorbent circuit (15) during the humidifying operation, the circulation direction of the liquid absorbent by the circulation pump (16) is changed from the humidity adjustment part on the moisture absorption side (humidity adjustment part (45b) on the exhaust side) to the solar collector. In the direction toward (18), the liquid absorbent heated by the solar heat collector (18) can be supplied to the humidity adjustment part on the moisture release side (humidity adjustment part (45a) on the air supply side). On the other hand, when the circulation direction of the liquid absorbent by the circulation pump (16) is the direction from the humidity control section on the moisture release side (humidity control section on the air supply side (45a)) to the solar collector (18), The liquid absorbent passes through the solar collector (18) and flows to the moisture adjustment section on the moisture absorption side (humidity adjustment section (45b) on the exhaust side). 22).

  In a fifth aspect based on the second aspect, the heating section (44, 46a, 46b) flows out of the solar heat collector (18) to the humidity control section (45a, 45b) on the moisture release side. The liquid absorbent before flowing in is configured to be heated, and the liquid absorbent heated by the heating section (44, 46a, 46b) is supplied to the absorbent circuit (15) on the supply passage side. The switching unit (17) for switching the circulation direction of the liquid absorbent and the solar collector (18) are connected in parallel so as to flow to the wet part (45a) or the humidity control part (45b) on the exhaust passage side. The liquid absorbent heated by the heating unit (44, 46a, 46b) bypasses the solar heat collector (18) and is supplied to the moisture conditioning unit (45a, 45b) on the moisture release side. A heater bypass channel (22) is provided.

  In the fifth invention, the switching part (17) changes the circulation direction of the liquid absorbent so that the liquid absorbent heated by the heating part (44, 46a, 46b) flows to the humidity control part (45b) on the exhaust side. When switched, the humidity control section (45b) on the exhaust side becomes the moisture release side, and the humidity control section (45a) on the supply side becomes the moisture absorption side. Thereby, the humidity control apparatus performs a dehumidifying operation.

  In the absorbent circuit (15) in this dehumidifying operation, a solar collector (between the heating unit (44, 46a, 46b)) and the humidity control unit on the moisture release side (humidity control unit (45b) on the exhaust side) 18) is not arranged, the solar collector (18) is located between the moisture-adjusting part on the moisture absorption side (humidity adjustment part on the air supply side (45a)) and the heating part (44, 46a, 46b). It will be arranged in. In this case, the liquid absorbent that has flowed out of the humidity adjustment section (45a) on the air supply side, which is the moisture absorption side, flows through the solar collector (18) and the heating sections (44, 46a, 46b) in this order, and then released. It is supplied to the humidity control section (45b) on the exhaust side which is the wet side. On the other hand, when a solar collector (18) is placed between the heating unit (44, 46a, 46b) and the humidity control unit on the moisture release side (humidity control unit on the exhaust side (45b)), heating is performed. The liquid absorbent heated by the unit (44, 46a, 46b) is passed through the solar collector (18) and then supplied to the humidity control unit (45b) on the exhaust side, or the solar collector ( 18) Depending on the temperature of the solar collector (18), whether to supply to the humidity control section (45b) on the exhaust side after passing through the collector bypass flow path (22) to bypass Can be switched automatically. Specifically, for example, when the temperature of the outside air where the solar collector (18) is installed is relatively low, the liquid absorbent heated by the heating unit (44, 46a, 46b) In order to avoid being cooled by the collector (18), the liquid absorbent that has flowed out of the heating section (44, 46a, 46b) is allowed to pass through the collector bypass flow path (22) and then adjusted on the exhaust side. Can be supplied to the wet section (45b).

  Further, when the switching direction of the liquid absorbent is switched by the switching section (17) so that the liquid absorbent heated by the heating section (44, 46a, 46b) flows to the humidity control section (45a) on the supply side, The humidity control part (45b) on the exhaust side becomes the moisture absorption side, and the humidity control part (45a) on the supply side becomes the moisture release side. Thereby, a humidity control apparatus performs humidification operation.

  In the absorbent circuit (15) in the humidifying operation, a solar collector is provided between the heating unit (44, 46a, 46b) and the humidity control unit on the moisture release side (humidity control unit (45a) on the supply side). When (18) is not arranged, the solar collector (18) is located between the moisture absorption side humidity control part (exhaust side humidity control part (45b)) and the heating part (44, 46a, 46b). It will be arranged in. In this case, the liquid absorbent that has flowed out of the humidity control section (45b) on the exhaust side, which is the moisture absorption side, flows through the solar collector (18) and the heating section (44, 46a, 46b) in this order, and then releases moisture. Is supplied to the humidity control section (45b) on the air supply side. On the other hand, when a solar heat collector (18) is disposed between the heating unit (44, 46a, 46b) and the humidity control unit on the moisture release side (humidity control unit (45a) on the air supply side) Supply the liquid absorbent heated by the heating unit (44,46a, 46b) to the humidity control unit (45b) on the exhaust side after passing through the solar collector (18), or the solar collector The temperature near the solar collector (18) is determined whether to supply the humidity control section (45a) on the air supply side after passing through the collector bypass flow path (22) so as to bypass (18). It can be selectively switched accordingly.

  In a sixth aspect based on any one of the first to fifth aspects, the humidity control section disposed in the air supply passage (31) constitutes a dehumidifying section (45a) for dehumidifying air into the room. In addition, the humidity control unit disposed in the exhaust passage (32) constitutes a regeneration unit (45b) that releases air to the outside of the room, and the absorbent circuit (15) includes the dehumidification unit (45a) and the regeneration unit. Dehumidifying operation for circulating the liquid absorbent between the parts (45b), bypassing the dehumidifying part (45a), and supplying the liquid absorbent between the regenerating part (45b) and the solar collector (18). A dehumidifying unit bypass circuit (25) that performs switching between the regeneration operation to be circulated is provided.

  In the sixth aspect of the invention, the humidity control section (45b) on the exhaust passage side becomes the moisture release side and the humidity control section (45a) on the air supply passage side becomes the moisture absorption side, and the exhaust passage side which becomes the moisture release side After the liquid absorbent flowing out from the humidity control section (45b) was supplied to the solar collector (18) by bypassing the humidity control section (45b) on the air supply passage side, the humidity adjustment on the exhaust passage side again The regeneration operation to return to the section (45b) can be switched.

  In the regeneration operation, the liquid absorbent that has been heated by the solar heat collector (18) and has increased the partial pressure of water vapor is supplied to the humidity control section on the moisture release side (that is, the humidity control section (45b) on the exhaust passage side). The The liquid absorbent imparts moisture to the air flowing through the exhaust passage (32). This moisture is released to the outside along with the exhaust. On the other hand, the concentration of the liquid absorbent increases due to moisture release. The liquid absorbent having a high concentration is supplied again to the solar heat collector (18) and heated. By repeating this cycle, the concentration of the liquid absorbent increases.

  A seventh invention is characterized in that, in the sixth invention, a control unit (16a) is provided that stops the circulation pump (16) when the concentration of the liquid absorbent reaches a predetermined value during the regeneration operation.

  In the seventh invention, when the concentration of the liquid absorbent reaches a predetermined value during the regeneration operation, the control unit (16a) stops the circulation pump (16). As a result, the regeneration operation is stopped.

  The eighth invention is characterized in that, in the sixth or seventh invention, a tank portion (29) for storing the liquid absorbent during the regeneration operation is provided.

  In the eighth invention, the liquid absorbent having a high concentration by the regeneration operation can be stored in the tank portion.

  According to the first invention, the liquid absorbent supplied to the humidity control section (45a, 45b) on the moisture release side flows through the solar collector (18) connected to the absorbent circuit (15). Heated. In this way, when the liquid absorbent is directly heated by sunlight, compared to the case where the liquid absorbent is heated by exchanging heat between the hot water heated by the solar collector and the liquid absorbent as in the past. Thus, heat loss that occurs during heat exchange can be reduced. In addition, since the hot water circuit for circulating the hot water to the solar heat collector becomes unnecessary, the structure of the humidity control device is simplified.

  Further, according to the second invention, even when the liquid absorbent cannot be sufficiently heated by the solar collector (18) in winter, for example, the heating part (44, 46a, 46b) is surely heated. it can. Moreover, according to 2nd invention, after a liquid absorbent is heated by the heating part (44,46a, 46b), it is not supplied to a solar collector (18). Therefore, it is possible to avoid the liquid absorbent heated by the heating unit (44, 46a, 46b) from being cooled by the solar heat collector (18) in winter when the temperature is relatively low.

  According to the third aspect of the present invention, in the humidity control apparatus capable of switching between the dehumidifying operation and the humidifying operation by switching the refrigerant circulation direction, the switching unit (17) for switching the absorbent circulation direction is used. doing. In this way, in both the dehumidifying operation and the humidifying operation, the liquid absorbent heated by the solar heat collector (18) can be supplied to the humidity control section (45a, 45b) on the moisture release side. 10) can save more energy.

  Further, according to the fourth invention, in the humidity control apparatus capable of switching between the dehumidifying operation and the humidifying operation by switching the circulation direction of the refrigerant, the humidity controller is connected in parallel with the solar heat collector (18). A heat collector bypass channel (22) is provided. In this way, even if the circulation direction is fixed in one direction by the circulation pump (16), the liquid absorbent that has flowed out from the humidity control section (45a, 45b) on the moisture release side is removed from the solar collector ( 18) can be bypassed and supplied to the humidity control section (45a, 45b) on the moisture absorption side. Thereby, it can avoid that the liquid absorbent supplied to the moisture-control part (45a, 45b) of a moisture absorption side will be heated with a solar collector (18).

  According to the fifth aspect of the present invention, in the humidity control apparatus capable of switching between the dehumidifying operation and the humidifying operation by switching the circulation direction of the liquid absorbent, connected in parallel with the solar heat collector (18). The heat collector bypass flow path (22) is provided. In this way, the liquid absorbent that has flowed through the moisture-adjusting part (45a, 45b) and the heating part (46a, 46b) in order is bypassed the solar heat collector (18), and the moisture-adjusting part on the moisture release side (45a, 45b). Thereby, when the temperature of a solar collector (18) is low, it can avoid that the liquid absorbent heated by the heating part (46a, 46b) will be cooled by a solar collector (18). .

  Further, according to the sixth invention, for example, by performing the regeneration operation when the dehumidifying operation is not performed, the concentration of the liquid absorbent can be increased in advance when the dehumidifying operation is performed next. Thereby, the dehumidification capability of a humidity control apparatus can be improved.

  Further, according to the seventh invention, it is possible to avoid precipitation of the liquid absorbent by setting the concentration of the liquid absorbent for stopping the regeneration operation to a concentration at which the liquid absorbent is not deposited.

  Further, according to the eighth invention, the liquid absorbent having a high concentration can be stored and used when the humidity control capability of the humidity control apparatus is insufficient.

FIG. 1 is a circuit diagram illustrating configurations of an absorbent circuit and a refrigerant circuit of the humidity control apparatus according to the first embodiment. FIG. 2 is a schematic perspective view illustrating the humidity control module of Embodiment 1 with a part thereof omitted. FIG. 3 is a schematic cross-sectional view illustrating a horizontal cross section of the humidity control module according to the first embodiment. FIG. 4 is a schematic perspective view illustrating the humidity control module of Embodiment 1 with a part thereof omitted. FIG. 5 is a schematic exploded perspective view illustrating the humidity control module of Embodiment 1 with a part thereof omitted. 6A and 6B are diagrams showing an inner member provided in the humidity control module of Embodiment 1, wherein FIG. 6A is a schematic perspective view, and FIG. 6B is a schematic cross-sectional view showing a horizontal section thereof. FIG. 7 is a diagram illustrating operations of the liquid absorbent and the refrigerant during the dehumidifying operation in the first embodiment. FIG. 8 is a diagram illustrating operations of the liquid absorbent and the refrigerant during the humidifying operation in the first embodiment. FIG. 9 is a diagram illustrating operations of the liquid absorbent and the refrigerant during the regeneration operation in the first embodiment. FIG. 10 is a flowchart for explaining conditions for stopping the regeneration operation. FIG. 11 is a circuit diagram illustrating the configuration of the absorbent circuit and the refrigerant circuit of the humidity control apparatus according to the second embodiment. FIG. 12 is a diagram illustrating operations of the liquid absorbent and the refrigerant during the dehumidifying operation in the second embodiment. FIG. 13 is a diagram illustrating operations of the liquid absorbent and the refrigerant during the humidifying operation in the second embodiment. FIG. 14 is a circuit diagram illustrating configurations of an absorbent circuit and a refrigerant circuit of the humidity control apparatus according to the third embodiment. FIG. 15 is a diagram illustrating operations of the liquid absorbent and the refrigerant during the dehumidifying operation in the third embodiment. FIG. 16 is a diagram illustrating operations of the liquid absorbent and the refrigerant during the humidifying operation in the third embodiment. FIG. 17 is a circuit diagram illustrating configurations of an absorbent circuit and a refrigerant circuit of a humidity control apparatus according to a modification of the third embodiment. FIG. 18 is a circuit diagram illustrating configurations of an absorbent circuit and a refrigerant circuit of the humidity control apparatus according to the fourth embodiment. FIG. 19 is a circuit diagram illustrating the configuration of the absorbent circuit and the refrigerant circuit of the humidity control apparatus according to the fifth embodiment.

  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 first embodiment is a humidity control device (10) that performs dehumidification and humidification of air.

-Configuration of humidity control device-
The humidity control apparatus (10) of the first embodiment includes an absorbent circuit (15) and a refrigerant circuit (35).

  The refrigerant circuit (35) includes a compressor (36), a four-way switching valve (37) for switching the refrigerant circulation direction, an expansion valve (38), an air supply side module (40a), and an exhaust side module ( 40b) is a closed circuit. In this refrigerant circuit (35), the discharge side of the compressor (36) is the first port of the four-way switching valve (37), and the suction side of the compressor (36) is the second port of the four-way switching valve (37). Each is connected. Further, in this refrigerant circuit (35), the exhaust-side heat exchange unit (46b), the expansion valve (38), and the air supply are sequentially arranged from the third port to the fourth port of the four-way switching valve (37). The side heat exchange part (46a) is connected. The refrigerant circuit (35) performs a vapor compression refrigeration cycle by circulating the filled refrigerant. The refrigerant circuit (35) supplies the refrigerant as a heat medium to the supply side module (40a) and the exhaust side module (40b).

  The four-way selector valve (37) switches between a first state (state indicated by a solid line in FIG. 1) and a second state (state indicated by a broken line in FIG. 1). In the four-way switching valve (37) in the first state, the first port communicates with the third port, and the second port communicates with the fourth port. On the other hand, in the four-way switching valve (37) in the second state, the first port communicates with the fourth port, and the second port communicates with the third port.

  As shown in FIG. 1, the absorbent circuit (15) includes a circulation pump (16), a four-way switching valve (17) as a switching unit for switching the circulation direction of the liquid absorbent, and an air supply side module (40a ), An exhaust side module (40b), a solar heat collector (18), and a liquid storage tank (19a) are connected to each other. In this absorbent circuit, the discharge side of the circulation pump (16) is connected to the first port of the four-way switching valve (17), and the suction side of the circulation pump (16) is connected to the second port of the four-way switching valve (17). . Further, in this absorbent circuit (15), in order from the third port to the fourth port of the four-way switching valve (17), the liquid storage tank (19a) and the humidity control unit (45b) of the exhaust side module (40b) are arranged. ), The solar heat collector (18), and the humidity control section (45a) of the supply side module (40a). The absorbent circuit (15) is filled with an aqueous lithium chloride solution as a liquid absorbent.

  The circulation pump (16) is stopped by the circulation pump control unit (16a). The circulation pump control unit (16a) stops the circulation pump (16) based on the liquid level detected by a concentration detection mechanism (19) described in detail later.

  The four-way switching valve (17) is switched between a first state (state indicated by a solid line in FIG. 1) and a second state (state indicated by a broken line in FIG. 1). In the four-way switching valve (17) in the first state, the first port communicates with the fourth port, and the second port communicates with the third port. On the other hand, in the four-way switching valve (17) in the second state, the first port communicates with the third port, and the second port communicates with the fourth port.

  The solar collector (18) is for heating the liquid absorbent using the heat of sunlight. The solar collector (18) is installed outdoors (for example, on the roof) or the like where it is easy to receive sunlight. A heating channel (18a) is formed in the solar heat collector (18). The heating channel (18a) is connected to the absorbent circuit (15). The liquid absorbent that has flowed into the heating channel (18a) is heated by sunlight while flowing through the heating channel (18a). Moreover, the collector side temperature sensor (23) is arrange | positioned in the vicinity of the solar collector (18). The collector side temperature sensor (23) is for measuring the temperature in the vicinity of the solar collector (23). The value detected by the collector side temperature sensor (23) is transmitted as needed to the collector side switching valve control unit (24) for controlling the collector side switching valve (21) described later.

  The liquid storage tank (19a) is disposed between the exhaust side module (40b) and the third port of the four-way switching valve (17) in the absorbent circuit (15). A part of the liquid absorbent circulating in the absorbent circuit (15) is stored in the liquid storage tank (19a). The liquid level of the liquid absorbent stored in the liquid storage tank (19a) varies depending on the amount of liquid absorbent circulating in the absorbent circuit (15). Specifically, when the amount of liquid absorbent circulating through the absorbent circuit (15) decreases, the liquid level decreases, and when the amount of liquid absorbent circulating through the absorbent circuit (15) increases, liquid level increases. Surface height increases.

  A liquid level sensor (19b) is attached to the liquid storage tank (19a). The liquid level sensor (19b) detects the height of the liquid level of the liquid absorbent stored in the liquid storage tank (19a). The liquid level sensor (19b) and the liquid storage tank (19a) constitute a concentration detection mechanism (19) that detects the concentration of the liquid absorbent circulating in the absorbent circuit (15).

  Connected to the absorbent circuit (15) are a heat collection unit bypass circuit (20), a supply-side humidity control unit bypass circuit (25) as a dehumidification unit bypass circuit, and a storage tank (29) as a tank unit Has been.

  The heat collector bypass circuit (20) includes a heat collector side switching valve (21) and a heat collector bypass channel (22).

  The heat collector side switching valve (21) is connected between the exhaust side module (40b) and the solar heat collector (18) in the absorbent circuit (15). The collector side switching valve (21) has three ports, the first port on the exhaust side module (40b) side, the second port on the solar collector (18) side, and the third port. A port is connected to one end of the heat collector bypass channel (22).

  The collector side switching valve (21) switches between a first state (state indicated by a solid line in FIG. 1) and a second state (state indicated by a broken line in FIG. 1). In the heat collector side switching valve (21) in the first state, the first port communicates with the second port. On the other hand, in the heat collector side switching valve (21) in the second state, the first port communicates with the third port.

  One end of the heat collector bypass flow path (22) is connected to the third port of the heat collector side switching valve (21) and the other end is connected to the solar heat collector (18) in the absorbent circuit (15). Each is connected between the side modules (40a).

  The air supply side humidity control unit bypass circuit (25) includes a humidity control unit side switching valve (26) and an air supply side humidity control unit bypass flow path (27).

  The humidity control unit side switching valve (26) is connected between the fourth port of the four-way switching valve (17) in the absorbent circuit (15) and the air supply side module (40a). The humidity control side switching valve (26) has three ports, the first port on the four-way switching valve (17) side, the second port on the air supply side module (40a) side, and the third port. Are respectively connected to one end of the air supply side humidity control unit bypass flow path (27).

  The humidity control unit side switching valve (26) switches between a first state (state indicated by a solid line in FIG. 1) and a second state (state indicated by a broken line in FIG. 1). In the heat collector side switching valve (21) in the first state, the first port communicates with the second port. On the other hand, in the heat collector side switching valve (21) in the second state, the first port communicates with the third port.

  One end of the air supply side humidity control section bypass flow path (27) is connected to the third port of the humidity control section side switching valve (26), and the other end is connected to the air supply side module (40a) in the absorbent circuit. Each is connected between the heater (18).

  A first pipe (33) and a second pipe (34) are connected to the storage tank (29). The first pipe (33) is a pipe for allowing the liquid absorbent of the absorbent circuit (15) to flow into the storage tank (29), and the second pipe (34) is stored in the storage tank (29). This is a pipe for returning the liquid absorbent to the absorbent circuit (15).

  The first pipe (33) has an inflow end connected between the exhaust side module (40b) in the absorbent circuit (15) and the first port of the collector side switching valve (21), and an outflow end at the storage tank. It is connected to the upper end of (29). The second pipe (34) has an inflow end connected to the lower end of the storage tank (29) and an outflow end connected to the exhaust side module (40b) and the collector side switching valve (21) in the absorbent circuit (15). ) To the first port. The first pipe (33) and the second pipe (34) are provided with on-off valves (33a, 34a), respectively. These on-off valves (33a, 34a) are normally fully closed.

-Configuration of humidity control module-
The air supply side module (40a) and the exhaust side module (40b) are both constituted by a humidity control module (40). Here, the humidity control module (40) will be described with reference to FIGS.

  The humidity control module (40) is for adjusting the humidity of the air with the liquid absorbent. The humidity control module (40) includes one outer case (50), a plurality of inner members (60), and two heat transfer members (46). The inner member (60) and the heat transfer member (46) are accommodated in the outer case (50). The humidity control section (45) for transferring moisture between the liquid absorbent and the air by one outer case (50) and a plurality of inner members (60) accommodated in the one outer case (50). Composed. The humidity control apparatus (10) of the first embodiment includes two humidity control units (45). Of the two humidity control units, the humidity control unit of the supply side module (40a) constitutes the supply side humidity control unit (45a), and the humidity control unit of the exhaust side module (40b) is the exhaust side humidity control unit (45b). The air supply side humidity control section (45a) is disposed in an air flow path from room to room (in this embodiment, the air supply passage (31)), and the exhaust side humidity control section (45b) is It arrange | positions to the air flow path (it is set as the exhaust passage (32) in this embodiment) to the outdoor.

  As shown in FIG. 2, the outer case (50) is formed in a hollow rectangular parallelepiped shape, and includes a bottom plate (51), a top plate (52), a pair of side plates (53, 54), and a pair of ends. Board (55). FIG. 2 shows a state in which the top plate (52) and the front end plate (55) are omitted. Each side plate (53, 54) has a plurality of ventilation holes (56) penetrating the side plate (53, 54) in the thickness direction. Each ventilation hole (56) has a vertically long rectangular shape. As shown in FIG. 3, the plurality of ventilation holes (56) are arranged in a line at regular intervals in the longitudinal direction of the side plates (53, 54).

  As shown in FIGS. 4 and 6, the inner member (60) is formed in a hollow rectangular parallelepiped shape having both ends opened. The inner member (60) includes a support frame (61) and a moisture permeable membrane (62). The lower surface and the upper surface of the support frame (61) are formed in a plate shape. That is, the lower surface and the upper surface of the support frame (61) are closed. The moisture permeable membrane (62) is provided so as to cover the side surface of the support frame (61). Accordingly, the moisture permeable membrane (62) provided on the inner member (60) is planar. The moisture permeable membrane (62) is a membrane that allows water vapor to pass through without passing through the liquid absorbent. As the moisture permeable membrane (62), for example, a hydrophobic porous membrane made of a fluororesin such as PTFE (polytetrafluoroethylene, tetrafluoroethylene resin) can be used.

  The outer case (50) accommodates the same number of inner members (60) as the ventilation holes (56) formed in the side plates (53, 54). Inside the outer case (50), the inner members (60) are arranged in a line in the longitudinal direction of the outer case (50) so that the moisture permeable membranes (62) covering the respective side surfaces face each other.

  As shown in FIG. 3, the opening (63) on the end face of the inner member (60) and the ventilation holes (56) of the side plates (53, 54) of the outer case (50) have the same shape and size. ing. The inner member (60) is fixed to the outer case (50) such that the opening (63) overlaps with the ventilation holes (56) of the side plates (53, 54). That is, in FIG. 3, the left end surface of the support frame (61) of the inner member (60) is joined to the peripheral portion of the ventilation hole (56) on the inner surface of the side plate (53) disposed on the left side. Moreover, in the same figure, the right end surface of the support frame (61) of the inner member (60) is joined to the peripheral portion of the ventilation hole (56) on the inner surface of the side plate (54) disposed on the right side.

  As shown in FIG. 3, the space inside the inner member (60) communicates with the outside through the ventilation hole (56) of the outer case (50), and becomes an air passage (42) through which air flows. Yes. In the air passage (42), air flowing through the air supply passage (31) or the exhaust passage (32) of the humidity control device (10) flows. In the humidity control section (45), an absorbent passage (41) through which the liquid absorbent flows is formed in a space outside the inner member (60) and inside the outer case (50). In the absorbent passage (41), the liquid absorbent circulating in the absorbent circuit (15) flows. Therefore, the moisture permeable membrane (62) has a surface in contact with the air flowing in the air passage (42) and a back surface in contact with the liquid absorbent flowing in the absorbent circuit (15).

  As described above, the plurality of inner members (60) accommodated in the outer case (50) are arranged in a line so that the moisture permeable membranes (62) covering the respective side surfaces face each other. For this reason, the air passage (42) and the absorbent passage (41) are alternately formed in the arrangement direction of the moisture permeable membrane (62) (in this embodiment, the longitudinal direction of the outer case (50)). In the absorbent passage (41), the portions sandwiched between the moisture permeable membranes (62) on both sides communicate with each other via the upper and lower portions of the inner member (60).

  The exhaust side module (40b) includes an outside air temperature sensor (47). The outdoor temperature sensor (47) is for detecting the outdoor temperature. The detected value of the outside air temperature sensor (47) is transmitted to the circulation pump control unit (16a) as needed.

  As shown in FIG. 5, the heat transfer member (46) includes a plurality of heat transfer tubes (70), one first header (71), and one second header (72).

  Each heat transfer tube (70) is a multi-hole flat tube made of aluminum (see FIG. 3). That is, the heat transfer tube (70) is formed in an oval shape with a flat cross section, and its internal space is partitioned into a plurality of flow paths. The flow path formed in each heat transfer tube (70) serves as a heat medium passage (43) through which the refrigerant of the refrigerant circuit (35) flows. In the heat transfer member (46), the plurality of heat transfer tubes (70) are arranged in a row at regular intervals so that their flat surfaces face each other. Moreover, as for each heat exchanger tube (70), each axial direction is an up-down direction.

  Each of the first header (71) and the second header (72) is formed in a circular tube with both ends closed. The 1st header (71) is joined to the upper end of each heat exchanger tube (70) arranged in a line. The 2nd header (72) is joined to the lower end of each heat exchanger tube (70) arranged in a line. The internal space of the first header (71) and the second header (72) communicates with the flow path formed in the heat transfer tube (70), and the heat medium passage together with the flow path in the heat transfer tube (70). (43).

  In the outer case (50), one of the two heat transfer members (46) is disposed closer to the first side plate (53), and the other is disposed closer to the second side plate (54). The heat transfer tubes (70) of the heat transfer members (46) are arranged one by one between the adjacent inner members (60). Therefore, in the humidity control module (40) of this embodiment, between the adjacent inner members (60), the heat transfer tube (70) of one heat transfer member (46) and the other heat transfer member (46). The heat transfer tube (70) is arranged. As described above, the space between the adjacent inner members (60) serves as the absorbent passage (41) of the humidity control section (45). Accordingly, the heat transfer tube (70) of the heat transfer member (46) is disposed in the absorbent passage (41), and the surface thereof is in contact with the liquid absorbent flowing through the absorbent passage (41). That is, the heat transfer tube (70) of the heat transfer member (46) is surrounded by the liquid absorbent flowing through the absorbent passage (41).

  Each heat transfer member (46) of the humidity control module (40) is connected to the refrigerant circuit (35). In the air supply side module (40a) configured by the humidity control module (40), the first header (71) of each heat transfer member (46) is connected to the fourth port of the four-way switching valve (37), The second header (72) of each heat transfer member (46) is connected to the expansion valve (38). On the other hand, in the exhaust side module (40b) constituted by the humidity control module (40), the first header (71) of each heat transfer member (46) is connected to the third port of the four-way switching valve (37). The second header (72) of each heat transfer member (46) is connected to the expansion valve (38).

-Operation of humidity control device-
The operation of the humidity controller (10) will be described. The humidity control apparatus (10) of the first embodiment has a high concentration liquid absorption when dehumidifying operation for dehumidifying indoor air supply, humidifying operation for humidifying indoor air supply, and indoor dehumidification is unnecessary. The regeneration operation in which the agent is generated in advance is selectively executed.

  Further, in the humidity control apparatus of the first embodiment, the heat collector bypass operation can be performed during the dehumidifying operation and the humidifying operation, as will be described in detail later.

<Dehumidifying operation>
In the refrigerant circuit (35) during the dehumidifying operation, the four-way selector valve (37) is set to the first state (the state indicated by the solid line in FIG. 7). In the refrigerant circuit (35), a vapor compression refrigeration cycle is performed by circulating the refrigerant. Further, in the refrigerant circuit (35) during the dehumidifying operation, the heat transfer member (46b) of the exhaust side module (40b) (that is, the heat exchange part (46b) on the exhaust side) serves as a heat dissipation part, and the air supply side module (40a The heat transfer member (46a) (that is, the heat exchange section (46a) on the supply side) serves as the evaporation section.

  The refrigerant flow in the refrigerant circuit (35) will be described in detail. As indicated by the white arrow in FIG. 7, the high-temperature and high-pressure gas refrigerant discharged from the compressor (36) passes through the four-way switching valve (37), and serves as a heating medium for the exhaust-side module (40b). It is supplied to the exhaust side heat exchange section (46b). The refrigerant flowing into the exhaust side heat exchange section (46b) dissipates heat and condenses to the liquid absorbent flowing through the absorbent passage (41b) of the exhaust side humidity control section (45b), and then the exhaust side heat exchange section (46b) ). This refrigerant is decompressed when passing through the expansion valve (38) to become a low-pressure refrigerant in a gas-liquid two-phase state, and serves as a cooling heat medium for the supply-side heat exchanger (46a) of the supply-side module (40a). Supplied to. The refrigerant that has flowed into the air supply side heat exchange section (46a) absorbs heat from the liquid absorbent flowing through the absorbent passage (41a) of the air supply side humidity adjustment section (45a) and evaporates, and then the air supply side heat exchange Part (46a). This refrigerant passes through the four-way switching valve (37) and is sucked into the compressor (36). The compressor (36) compresses the sucked refrigerant and discharges it.

  Further, in the absorbent circuit (15) during the dehumidifying operation, as shown in FIG. 7, all the three switching valves (17, 21, 26) are set to the first state.

  The flow of the liquid absorbent in the absorbent circuit (15) will be described in detail. As shown by the thick arrows in FIG. 7, the liquid absorbent discharged from the circulation pump (16) flows in order through the four-way switching valve (17) and the humidity control unit side switching valve (26), and the air supply side module ( It flows into the absorbent passage (41a) of the air supply side humidity control section (45a) of 40a). The liquid absorbent that has flowed into the absorbent passage (41a) is cooled by the supply-side heat exchange section (46a) as an evaporation section. The cooled liquid absorbent has a reduced water vapor partial pressure. On the other hand, in the air passage (42) of the air supply side humidity control section (45a), air supply (that is, indoor air supplied to the room) flows. In the air supply side humidity control section (45a), water vapor contained in the air supply passes through the moisture permeable membrane (62) and is absorbed by the liquid absorbent flowing through the absorbent passage (41a). The supply air dehumidified while passing through the air passage (42) of the supply-side module (40a) is supplied to the room thereafter. Thus, in the air supply side humidity control section (45a), part of the water vapor contained in the air supply in the air passage (42) passes through the moisture permeable membrane (62) and is absorbed by the liquid absorbent. Therefore, in the air supply side humidity control section (45a), the concentration of the liquid absorbent gradually decreases while passing through the absorbent passage (41a).

  The low-concentration liquid absorbent flowing out from the air supply side module (40a) is supplied to the solar heat collector (18). In the solar heat collector (18), the liquid absorbent flowing through the heating channel (18a) is heated by solar heat. Thereby, the water vapor partial pressure of the liquid absorbent increases.

  The liquid absorbent heated by the solar collector (18) passes through the collector-side switching valve (21) and passes through the absorbent passage (41b) in the exhaust-side humidity control section (45b) of the exhaust-side module (40b). Flow into. The liquid absorbent that has flowed into the absorbent passage (41b) is heated by the exhaust-side heat exchange section (46b) as a heat radiating section. The heated liquid absorbent further increases the water vapor partial pressure. On the other hand, in the air passage (42) of the exhaust side humidity control section (45b), exhaust (that is, outdoor air discharged to the outside) flows. In the exhaust side humidity control section (45b), part of the water contained in the liquid absorbent becomes water vapor and passes through the moisture permeable membrane (62), and passes through the air passage (42) of the exhaust side humidity control section (45b). Given to flowing exhaust. The water vapor imparted to the exhaust is discharged to the outside together with the exhaust. Thus, in the exhaust-side humidity control section (45b), part of the water contained in the liquid absorbent in the absorbent passage (41b) passes through the moisture permeable membrane (62) and is given to the exhaust. Therefore, in the exhaust-side humidity control section (45b), the concentration of the liquid absorbent gradually increases while passing through the absorbent passage (41b). The high-concentration liquid absorbent that has flowed out of the exhaust-side humidity control section (45b) flows through the storage tank (19a) and the four-way selector valve (17) in this order, and is sucked into the circulation pump (16). It is sent out to the module (40a).

-About collector bypass operation-
During the dehumidifying operation, for example in winter, the liquid absorbent cannot be heated by the solar heat collector (18), and conversely, the liquid absorbent may be cooled. In this case, the cooled liquid absorbent is supplied to the moisture control section (45b) on the moisture release side, so that moisture cannot be sufficiently released in the moisture control section (45b) on the moisture release side. In order to avoid this, in the humidity control apparatus of the first embodiment, a heat collector bypass operation can be performed.

  Specifically, for example, when the outdoor air temperature becomes relatively low and the detection value of the heat collector side temperature sensor (23) becomes a predetermined value (for example, 5 ° C.) or less, the heat collector side switching valve control unit (24 ) Switches the collector side switching valve (21) from the first state to the second state (from the state shown by the solid line in FIG. 7 to the state shown by the broken line). In this way, the liquid absorbent that has flowed out of the air supply side humidity control section (45a) flows through the collector bypass flow path (22) so as to bypass the solar collector (18), and then the exhaust side controller. Supplied to the wet section (45b). As a result, it is possible to avoid the cooled liquid absorbent from flowing into the exhaust-side humidity control section (45b) on the moisture release side.

<Humidification operation>
In the refrigerant circuit (35) during the humidifying operation, the four-way switching valve (37) is set to the second state (the state indicated by the solid line in FIG. 8). In the refrigerant circuit (35) during the humidifying operation, the supply air side heat exchange part (46a) serves as a heat dissipation part, and the exhaust side heat exchange part (46b) serves as an evaporation part.

  The refrigerant flow in the refrigerant circuit (35) will be described in detail. As indicated by the white arrows in FIG. 8, the high-temperature and high-pressure gas refrigerant discharged from the compressor (36) passes through the four-way switching valve (37), and serves as a heating medium as an air supply side module (40a). To the air supply side heat exchanger (46a). The refrigerant flowing into the air supply side heat exchange section (46a) dissipates and condenses to the liquid absorbent flowing through the absorbent passage (41a) of the air supply side humidity adjustment section (45a), and then supplies air heat exchange Part (46a). This refrigerant is decompressed when passing through the expansion valve (38) to become a low-pressure refrigerant in a gas-liquid two-phase state, and is supplied to the exhaust-side heat exchange section (46b) of the exhaust-side module (40b) as a cooling heat medium. Is done. The refrigerant that has flowed into the exhaust side heat exchange section (46b) absorbs heat from the liquid absorbent flowing through the absorbent passage (41b) of the exhaust side humidity adjustment section (45b) and evaporates, and then the exhaust side heat exchange section (46b) ). This refrigerant passes through the four-way switching valve (37) and is sucked into the compressor (36). The compressor (36) compresses the sucked refrigerant and discharges it.

  Further, in the absorbent circuit (15) during the humidifying operation, as shown in FIG. 8, the four-way switching valve (17) is moved to the second state, and the collector side switching valve (21) and the humidity control unit side switching valve ( 26) is set to the first state respectively.

  The flow of the liquid absorbent in the absorbent circuit (15) will be described in detail. As indicated by a thick arrow in FIG. 8, the liquid absorbent discharged from the circulation pump (16) flows into the absorbent passage (41b) of the exhaust-side humidity adjusting section (45b) through the liquid storage tank (19a). The liquid absorbent that has flowed into the absorbent passage (41b) is cooled by the refrigerant flowing through the exhaust-side heat exchange section (46b) serving as an evaporation section. The cooled liquid absorbent has a reduced water vapor partial pressure. On the other hand, exhaust flows through the air passage (42) of the exhaust side humidity control section (45b). In the exhaust side humidity control section (45b), water vapor contained in the exhaust gas passes through the moisture permeable membrane (62) and is absorbed by the liquid absorbent flowing through the absorbent passage (41b). The supplied air that has been absorbed while passing through the air passage (42) of the exhaust-side humidity control section (45b) is then discharged outside the room. Thus, in the exhaust-side humidity control section (45b), a part of the water vapor contained in the exhaust gas in the air passage (42) passes through the moisture permeable membrane (62) and is absorbed by the liquid absorbent. Therefore, in the exhaust-side humidity control section (45b), the concentration of the liquid absorbent gradually decreases while passing through the absorbent passage (41b).

  The low-concentration liquid absorbent flowing out from the exhaust side module (40b) is supplied to the solar heat collector (18) through the heat collector side switching valve (21). In the solar heat collector (18), the liquid absorbent flowing through the heating channel (18a) is heated by solar heat. Thereby, the water vapor partial pressure of the liquid absorbent increases.

  The liquid absorbent heated by the solar collector (18) flows into the absorbent passage (41a) of the supply side humidity control section (45a) of the supply side module (40a). The liquid absorbent that has flowed into the absorbent passage (41a) is heated by the refrigerant flowing through the supply-side heat exchange section (46a) as the heat radiating section. The heated liquid absorbent has an increased water vapor partial pressure. On the other hand, the air supply flows in the air passage (42) of the air supply side humidity control section (45a). In the air supply side humidity control section (45a), a part of the water contained in the liquid absorbent becomes water vapor and passes through the moisture permeable membrane (62), and the air passage (42 in the air supply side humidity control section (45a)) ). The water vapor given to the supply air is supplied into the room together with the supply air. Thus, in the air supply side humidity control section (45a), part of the water contained in the liquid absorbent in the absorbent passage (41a) permeates the moisture permeable membrane (62) and is given to the air supply. . Therefore, in the air supply side humidity control section (45a), the concentration of the liquid absorbent gradually increases while passing through the absorbent passage (41a). The high-concentration liquid absorbent that has flowed out of the air supply side humidity control section (45a) flows through the humidity control section side switching valve (26) and the four-way switching valve (17) in this order, and is sucked into the circulation pump (16). It is sent out to the exhaust side module (40b).

  Note that, during the humidification operation, the heat collector bypass operation can be performed in the same manner as during the dehumidification operation.

<Regeneration operation>
In the refrigerant circuit (35) during the regeneration operation, as shown in FIG. 9, the compressor (36) is not operated, and the vapor compression refrigeration cycle is not performed. The regeneration operation can also be performed in a state where the compressor (36) is operated and the vapor compression refrigeration cycle is performed.

  Further, in the absorbent circuit (15) during the regeneration operation, as shown in FIG. 9, the four-way switching valve (17) and the heat collector switching valve (21) are set to the first state, and the humidity control unit switching valve ( 26) is set to the second state. The four-way switching valve (17) may be in the second state.

  The flow of the liquid absorbent in the absorbent circuit (15) will be described in detail. As shown by the thick arrows in FIG. 9, the liquid absorbent discharged from the circulation pump (16) flows in order through the four-way switching valve (17) and the humidity control unit side switching valve (26). Then, the liquid absorbent flows through the air supply side humidity control unit bypass flow path (27) so as to bypass the air supply side humidity control unit (45a), and is supplied to the solar heat collector (18). The liquid absorbent is heated by the solar collector (18) and the water vapor partial pressure is increased.

  The liquid absorbent whose water vapor partial pressure has been increased is supplied to the exhaust side humidity control section (45b), and gives moisture to the exhaust gas flowing through the exhaust side humidity control section (45b). This moisture is discharged to the outside along with the exhaust. On the other hand, the concentration of the liquid absorbent increases by adding moisture to the exhaust gas. The liquid absorbent having a high concentration is supplied again to the solar heat collector (18) and heated to increase the water vapor partial pressure.

  By repeating the above cycle, the concentration of the circulating liquid absorbent gradually increases.

  On the other hand, the regeneration operation is stopped when the concentration of the liquid absorbent reaches a predetermined value in order to suppress the concentration of the liquid absorbent from becoming excessively high and the precipitation of the absorbent.

  FIG. 10 shows a flowchart from the start of the regeneration operation until the regeneration operation is stopped when the concentration of the liquid absorbent reaches a predetermined value.

  When the regeneration operation is started, the liquid level sensor (19b) detects the height of the liquid absorbent stored in the liquid storage tank (19a), and the outside air temperature sensor (47) detects the temperature of the outside air. (Step S10). Each detected value is transmitted to the circulation pump control unit (16a).

  Next, in step S20, the concentration (A) of the liquid absorbent is calculated based on the liquid level detected by the liquid level sensor (19b) by the circulation pump control unit (16a).

  Here, a method for calculating the concentration (A) of the liquid absorbent will be described.

  Since the absorbent contained in the liquid absorbent circulating through the absorbent circuit (15) is not released to the outside through the moisture permeable membrane (62), the amount thereof is constant. On the other hand, the amount of water in the liquid absorbent circulating through the absorbent circuit (15) is discharged to the outside or flows into the inside through the moisture permeable membrane (62), and the amount thereof changes. When the amount of water in the liquid absorbent is small (that is, when the concentration of the liquid absorbent is high), a liquid storage tank in which the liquid absorbent is stored in proportion to the amount of liquid absorbent circulating in the absorbent circuit (15) ( The liquid level of 19a) is lowered. On the other hand, when the amount of water in the liquid absorbent is large (that is, when the concentration of the liquid absorbent is low), the liquid level of the liquid storage tank (19a) increases. That is, there is a correspondence between the liquid level of the liquid storage tank (19a) and the concentration of the liquid absorbent. Therefore, by calculating the relationship between the liquid level of the liquid storage tank (19a) and the concentration of the liquid absorbent in advance through experiments, the liquid absorbent concentration from the liquid level of the liquid storage tank (19a) is calculated. Can be calculated.

  On the other hand, in step S20, the set concentration (B) is calculated based on the outside temperature detected by the outside temperature sensor (47). Specifically, the set concentration (B) calculated in step S20 is set to a concentration with a certain margin over the concentration of the liquid absorbent deposited in the environment of the outside air temperature detected by the outside air temperature sensor (47). Is done.

  Next, in step S30, the liquid absorbent concentration (A) is compared with the set concentration (B). When the concentration (A) of the liquid absorbent is lower than the set concentration (B), the process returns to step S10, and the liquid level height and the outside air temperature are detected again. When the concentration (A) of the liquid absorbent becomes equal to or higher than the set concentration (B) by the regeneration operation, the circulation pump control unit (16a) stops the circulation pump (16) and ends the regeneration operation.

  Note that after step S30, the liquid absorbent having a high concentration can be stored in the storage tank (29). Specifically, after step S30, the on-off valve (33a) of the first pipe (33) is fully opened. Thereby, a high concentration liquid absorbent can be stored in the storage tank (29). The high-concentration liquid absorbent stored in the storage tank (29) can be used as needed by opening the on-off valve (34a) of the second pipe (34).

-Effect of Embodiment 1-
As described above, in the humidity control apparatus (10) according to the first embodiment, the liquid absorbent circulating in the absorbent circuit is directly heated by the heat of sunlight. This suppresses heat loss due to heat exchange between the hot water and the liquid absorbent, as compared with the conventional case where the hot water circulating in the hot water circuit is heated and the liquid absorbent is heated by the hot water. it can. That is, the heat from sunlight can be used efficiently. In addition, since the conventional hot water circuit is unnecessary, the humidity control device (10) can be simplified.

  Moreover, in this Embodiment 1, the liquid absorber supplied to the moisture-control part (45a, 45b) of a moisture release side after heating with a solar collector (18) is used for the thermal radiation part (46a) as a heating part. 46b). Thereby, even if it is a case where a liquid absorber cannot fully be heated only with a solar collector (18), it can heat reliably with a thermal radiation part (46a, 46b). Moreover, since the calorie | heat amount provided to a liquid absorber from a thermal radiation part (46a, 46b) can be supplemented with a solar collector (18), a humidity control apparatus (10) can be energy-saving.

  In the humidity control apparatus (10) that switches between the dehumidifying operation and the humidifying operation by switching the refrigerant circulation direction, a four-way switching valve (17) for switching the liquid absorbent circulation direction is provided. In this way, the liquid absorbent heated by the solar heat collector (18) is supplied to the air supply side humidity control section (45a) serving as the moisture release side and the exhaust side humidity control section (45b) serving as the moisture release side. Therefore, it is possible to use the heat from sunlight in both the dehumidifying operation and the humidifying operation.

  Moreover, in Embodiment 1, the heat collector bypass flow path (22) connected in parallel with a solar heat collector (18) is provided. If it carries out like this, a liquid absorber can be poured to a heat collector bypass flow path (22) so that a solar heat collector (18) may be bypassed. If it carries out like this, when the temperature of external air is low, it can prevent that the liquid absorber supplied to the humidity control part (45a, 45b) by the side of heat radiation will be cooled by the solar heat collector (18).

  Moreover, in Embodiment 1, the density | concentration of a liquid absorbent can be made high by performing a reproduction | regeneration operation, when indoor air conditioning is not performed by the humidity control apparatus (10). If it carries out like this, since the high concentration liquid absorbent can be utilized at the time of performing dehumidification operation next, the dehumidification capability of a humidity control apparatus (10) can be raised. Moreover, the high concentration liquid absorbent produced | generated by the reproduction | regeneration operation | movement can be stored in a storage tank (29), and the liquid absorbent of a storage tank (29) can be utilized at the time of humidity control operation. Moreover, in Embodiment 1, it can suppress that a liquid absorbent precipitates by stopping a reproduction | regeneration operation based on the liquid level height of a liquid storage tank (19a).

<< Embodiment 2 of the Invention >>
The humidity control device (10) of the second embodiment differs from the humidity control device of the first embodiment in the configuration of the absorbent circuit (15). Specifically, the absorbent circuit (15) of the humidity control apparatus (10) of the second embodiment has a configuration in which the four-way switching valve (17) is omitted as shown in FIG. That is, in the humidity control apparatus (10) of Embodiment 2, the circulation direction of the liquid absorbent is set to one direction.

<Dehumidifying operation>
In the refrigerant circuit (35) during the dehumidifying operation, the four-way switching valve (37) is set to the first state (the state indicated by the solid line in FIG. 12). Thereby, the exhaust side heat exchange part (46b) becomes a heat radiating part, and the air supply side heat exchange part (46a) becomes an evaporation part.

  Further, in the absorbent circuit (15) during the dehumidifying operation, both the collector side switching valve (21) and the humidity control unit side switching valve (26) are in the first state (the state indicated by the solid line in FIG. 12). Is set.

  As shown by a thick arrow in FIG. 12, the liquid absorbent discharged from the circulation pump (16) flows through the humidity control section side switching valve (26), and the absorbent passage of the supply side humidity control section (45a). (41a) The liquid absorbent that has flowed into the absorbent passage (41a) is cooled by the refrigerant flowing through the supply-side heat exchange section (46a) serving as the evaporation section, the water vapor partial pressure is reduced, and the supply air is absorbed. Thereby, the supply air is dehumidified. On the other hand, the concentration of the liquid absorbent gradually decreases while passing through the absorbent passage (41a).

  The low-concentration liquid absorbent flowing out from the air supply side module (40a) is supplied to the solar heat collector (18). In the solar heat collector (18), the liquid absorbent flowing through the heating channel (18a) is heated by solar heat. This increases the water vapor partial pressure of the liquid absorbent.

  The liquid absorbent heated by the solar heat collector (18) flows into the absorbent passage (41b) of the exhaust side humidity control section (45b) through the collector side switching valve (21). The liquid absorbent that has flowed into the absorbent passage (41b) is heated by the exhaust-side heat exchange section (46b) as a heat radiating section. In the exhaust side humidity control section (45b), a part of the water contained in the liquid absorbent becomes water vapor and passes through the moisture permeable membrane (62) and is given to the exhaust. The water vapor imparted to the exhaust is discharged to the outside together with the exhaust. In the exhaust side humidity control section (45b), the concentration of the liquid absorbent gradually increases while passing through the absorbent passage (41b).

  The high-concentration liquid absorbent that has flowed out of the exhaust-side humidity control section (45b) flows through the storage tank (19a), is sucked into the circulation pump (16), and is sent out again toward the supply-side module (40a) .

<Humidification operation>
In the refrigerant circuit (35) during the humidifying operation, the four-way switching valve (37) is set to the second state (the state indicated by the solid line in FIG. 13). In the refrigerant circuit (35) during the humidifying operation, the supply air side heat exchange part (46a) serves as a heat dissipation part, and the exhaust side heat exchange part (46b) serves as an evaporation part.

  Further, in the absorbent circuit (15) during the humidifying operation, the collector side switching valve (21) is in the second state (solid line state shown in FIG. 13), and the humidity control unit side switching valve (26) is in the first state. Each state is set.

  As shown by the thick arrows in FIG. 13, the liquid absorbent discharged from the circulation pump (16) flows through the humidity control section side switching valve (26), and the absorbent passage of the air supply side humidity control section (45a). (41a) The liquid absorbent that has flowed into the absorbent passage (41a) is heated by the air supply side heat exchange section (46a) as a heat radiating section. In the air supply side humidity control section (45a), part of the water contained in the liquid absorbent becomes water vapor and passes through the moisture permeable membrane (62), and is given to the air supply. Thereby, supply air is humidified. In the air supply side humidity control section (45a), the concentration of the liquid absorbent gradually increases while passing through the absorbent passage (41a).

  The high-concentration liquid absorbent flowing out from the air supply side module (40a) flows through the heat collector bypass flow path (22) so as to bypass the solar heat collector (18), and the heat collector side switching valve ( 21) flows into the absorbent passage (41b) of the exhaust side humidity control section (45b) of the exhaust side module (40b) through 21). The liquid absorbent that has flowed into the absorbent passage (41b) is cooled by the exhaust-side heat exchange section (46b) serving as an evaporation section. In the exhaust side humidity control section (45b), the exhaust is absorbed by the liquid absorbent. In the exhaust side humidity control section (45b), the concentration of the liquid absorbent gradually decreases while passing through the absorbent passage (41b).

  The low-concentration liquid absorbent that has flowed out of the exhaust-side humidity control section (45b) flows through the storage tank (19a), is sucked into the circulation pump (16), and is sent out again toward the supply-side module (40a) .

-Effect of Embodiment 2-
As described above, in the humidity control apparatus (10) according to the second embodiment, as in the humidity control apparatus (10) of the first embodiment, the liquid absorbent circulating in the absorbent circuit (15) Direct heating. Thereby, while being able to use the heat | fever by sunlight efficiently, a humidity control apparatus (10) can be simplified.

  Further, in the second embodiment, the liquid absorbent flowing out from the humidity control section on the moisture release side (the air supply side humidity control section (45a) in the second embodiment) is absorbed by bypassing the solar heat collector (18). It can be supplied to the side humidity control section (exhaust side humidity control section (45b) in the second embodiment). Thereby, it can avoid supplying the liquid absorbent heated by the solar heat collector (18) to the humidity control part by the side of moisture release.

<< Embodiment 3 of the Invention >>
The humidity control device (10) of the third embodiment is different from the humidity control device of the first embodiment in the configuration of the refrigerant circuit (35). Specifically, as shown in FIG. 14, the refrigerant circuit (35) of the third embodiment has a configuration in which the four-way switching valve (37) is omitted. And in the humidity control apparatus (10) of Embodiment 3, instead of the air supply side heat exchange part (46a) and exhaust side heat exchange part (46b) in Embodiment 1, the heat radiating part (46a) as a heating part. And an evaporation section (46b).

  The refrigerant circuit (35) of the third embodiment is connected to the compressor (36), the heat radiating section (46a), the expansion valve (38), and the evaporation section (46b). The heat radiating part (46a) is disposed between the exhaust side humidity control part (45b) and the heat collector side switching valve (21) in the absorbent circuit (15). The evaporation part (46b) is connected between the four-way switching valve (17) and the humidity control part side switching valve (26) in the absorbent circuit (15).

<Dehumidifying operation>
In the absorbent circuit (15) during the dehumidifying operation, as shown in FIG. 15, all of the three switching valves (17, 21, 26) are set to the first state.

  As indicated by a thick arrow in FIG. 15, the liquid absorbent discharged from the circulation pump (16) flows to the evaporation section (46b) through the four-way switching valve (17). The liquid absorbent is cooled by the evaporation section, and the water vapor partial pressure is reduced.

  The liquid absorbent having a reduced water vapor partial pressure flows into the air supply side humidity control section (45a) through the humidity control section side switching valve (26). This liquid absorbent absorbs moisture from the supply air flowing through the supply side humidity control section (45a). Thereby, dehumidification of indoor air is performed. On the other hand, the liquid absorbent flowing through the air supply side humidity control section (45a) absorbs moisture from the air supply, and its concentration decreases.

  The low-concentration liquid absorbent that has flowed out of the supply-side humidity control section (45a) is supplied to the solar heat collector (18). In the solar heat collector (18), the liquid absorbent flowing through the heating channel (18a) is heated by solar heat. This increases the water vapor partial pressure of the liquid absorbent.

  The liquid absorbent heated by the solar collector (18) flows into the heat radiating section (46a) through the collector side switching valve (21). The liquid absorbent is heated by the heat dissipating part (46a) and the water vapor partial pressure rises.

  The liquid absorbent whose water vapor partial pressure has increased flows into the exhaust side humidity control section (45b). This liquid absorbent releases moisture to the exhaust flowing through the exhaust-side humidity control section (45b). Thereby, moisture is discharged to the outside together with the exhaust. On the other hand, the concentration of the liquid absorbent flowing through the exhaust-side humidity control section (45b) increases due to moisture release. The liquid absorbent whose concentration has been increased is sucked into the circulation pump (16) through the liquid storage tank (19a) and the four-way switching valve (17) and then discharged again.

<Humidification operation>
In the absorbent circuit (15) during the humidifying operation, as shown in FIG. 16, the four-way selector valve (17) and the heat collector side selector valve (21) are set to the second state, and the humidity control unit side selector valve ( 26) is set to the first state. As indicated by a thick arrow in FIG. 16, the liquid absorbent discharged from the circulation pump (16) is supplied to the exhaust-side humidity control section (45b) through the liquid storage tank (19a). As will be described later, since this liquid absorbent is cooled by the evaporation section (46b) and has a low water vapor partial pressure, it absorbs moisture from the exhaust by the exhaust-side humidity adjustment section (45b). Thereby, the density | concentration of a liquid absorbent becomes low.

  The low-concentration liquid absorbent that has flowed out of the exhaust-side humidity control section (45b) is heated by the heat dissipation section (46a). Thereby, the water vapor partial pressure of the liquid absorbent increases.

  The liquid absorbent whose water vapor partial pressure has increased flows into the solar heat collector (18) or the heat collector bypass channel (18) based on the detection value of the heat collector temperature sensor (23). Specifically, when the detected value at the collector temperature sensor (23) exceeds a predetermined value (for example, 30 ° C.), the liquid absorbent flows through the solar collector (18). On the other hand, when the detected value becomes a predetermined value (30 ° C.) or less, the collector side switching valve control section (24) switches the collector side switching valve (21) from the first state to the second state. Thereby, a liquid absorber flows through a heat collector bypass flow path (22) so that a solar heat collector (18) may be bypassed, and is supplied to an air supply side humidity control part (45a). The liquid absorbent is dehumidified by the air supply side humidity control section (45a) to humidify the supply air. Thereby, the density | concentration of a liquid absorbent becomes high.

  The high-concentration liquid absorbent that has flowed out of the air supply side humidity control section (45b) flows into the evaporation section (46b) through the humidity control section side switching valve (26). Thereby, the liquid absorbent is cooled and the water vapor partial pressure is lowered. This liquid absorbent is sucked into the circulation pump (16) through the four-way switching valve (17), and is sent out again toward the exhaust-side humidity control section (45b).

-Effect of Embodiment 3-
As described above, in the humidity control apparatus (10) according to the third embodiment, as in the humidity control apparatus of the first and second embodiments, the liquid absorbent circulating in the absorbent circuit (15) By direct heating. Thereby, while being able to use the heat | fever by sunlight efficiently, a humidity control apparatus (10) can be simplified.

  In the third embodiment, the liquid absorbent from the moisture-absorbing-side humidity adjusting unit (exhaust-side humidity adjusting unit (45b) in the third embodiment) heated by the heat radiating unit (46a) is added to the collector temperature sensor (23 ) In the solar collector (18) or the collector bypass flow path (22). If it carries out like this, when the temperature of a solar collector (18) is low, it can avoid that the liquid absorbent heated by the thermal radiation part (46a) will be cooled by a solar collector (18).

<< Modification of Embodiment 3 >>
As shown in FIG. 17, the humidity control apparatus (10) of the first modification has a configuration in which the refrigerant circuit (35) is omitted as compared with the case of the third embodiment. And in the modification 1, the heater (44) as a heating part is provided between the exhaust side humidity control part (45b) and the solar collector (18) in an absorber circuit (15).

  Even with such a configuration, the same effect as in the third embodiment can be obtained.

<< Embodiment 4 of the Invention >>
The humidity control apparatus (10) of the fourth embodiment has a configuration in which many components are omitted as compared with the case of each of the above embodiments. In particular, in the humidity control apparatus (10) of Embodiment 4, the heating part (46, 46a, 46b) is omitted. That is, in this embodiment, only the solar heat collector (18) is used as a heat source for heating the liquid absorbent circulating in the absorbent circuit.
As shown in FIG. 18, in the absorbent circuit (15), the circulation pump (16) in which the circulation direction is set to one direction, the exhaust-side humidity control unit (45a), the solar heat collector (18), the air supply The side humidity control part (45b) is connected. The circulation pump (16) discharges the liquid absorbent to the air supply side humidity control section (45a). The humidity control apparatus (10) of the fourth embodiment performs only the dehumidifying operation.

  The liquid absorbent discharged from the circulation pump (16) is supplied to the air supply side humidity control section (45a). As will be described later, this liquid absorbent has a relatively high concentration. The high concentration liquid absorbent supplied to the air supply side humidity control section (45a) absorbs moisture from the supply air. Thereby, the air supplied indoors is dehumidified. On the other hand, the concentration of the liquid absorbent is lowered by absorbing moisture from the air.

  The low-concentration liquid absorbent that has flowed out of the supply-side humidity control section (45a) flows into the solar heat collector (18). The liquid absorbent is heated by the solar heat collector (18) and the water vapor partial pressure rises.

  The liquid absorbent that has flowed out of the solar heat collector (18) is supplied to the exhaust-side humidity control section (45b). In the exhaust side humidity control section (45b), the low concentration liquid absorbent releases moisture to the exhaust. This moisture is discharged to the outside along with the exhaust. The concentration of the liquid absorbent increases due to moisture release and flows out from the exhaust-side humidity control section (45b).

  The high-concentration liquid absorbent that has flowed out of the exhaust side humidity control section (45b) is sucked into the circulation pump (16) and sent out again toward the air supply side humidity control section (45a).

  As described above, in the fourth embodiment, it is possible to form a humidity control device dedicated to dehumidification that can efficiently use heat from sunlight with a relatively easy configuration. Moreover, in the humidity control apparatus of the fourth embodiment, since the refrigerant circuit (35) and the heater (44) are not provided, the humidity control apparatus can save energy.

<< Embodiment 5 of the Invention >>
Unlike the humidity control apparatus of the fourth embodiment, the humidity control apparatus (10) of the fifth embodiment is configured to perform only the humidification operation. Specifically, the circulation direction of the circulation pump (16) of the humidity control apparatus (10) of the fifth embodiment is opposite to that of the fifth embodiment. Thereby, the air supplied to the room is humidified.

-Effect of Embodiment 5-
Thus, in Embodiment 5, the humidity control apparatus only for humidification which can use the heat | fever by sunlight efficiently can be formed with a comparatively easy structure. Moreover, in the humidity control apparatus of the fifth embodiment, the refrigerant circuit (35) and the heater (44) are not provided, so that the humidity control apparatus can save energy.

<< Other Embodiments >>
Each of the above embodiments may be configured as follows.

  In each of the above-described embodiments, the humidity control device (10) provided with the four-way switching valve (17) for switching the circulation direction of the liquid absorbent in the absorbent circuit (15) includes the four-way switching valve (17). An omitted configuration may be used. In this case, the circulation pump (16) may be a reversible pump capable of switching the circulation direction of the liquid absorbent. In this case, the switching unit for switching the circulation direction of the liquid absorbent constitutes a part of the reversible pump.

  As described above, the present invention is particularly useful for a humidity control apparatus that adjusts the humidity of air with a liquid absorbent.

15 Absorbent Circuit 16 Circulation Pump 16 Circulation Pump Control Unit (Control Unit)
17 Four-way switching valve (switching part)
18 Solar collector 22 Heat collector bypass flow path 25 Supply air humidity control section bypass circuit (dehumidification section bypass circuit)
29 Storage tank (tank part)
31 Supply Air Passage 32 Exhaust Passage 35 Refrigerant Circuit 44 Heater 45a Supply Air Humidity Control Unit (Humidity Control Unit on Moisture Release Side, Humidity Control Unit on Hygroscopic Side)
45b Exhaust-side humidity control unit (humidity control unit on moisture release side, humidity control unit on moisture absorption side)
46a Supply side heat exchange part (heat radiation part, evaporation part), heat release part 46b Exhaust side heat exchange part (heat radiation part, evaporation part), evaporation part

Claims (8)

The humidity control section (45a) disposed in the air supply passage (31) for supplying air to the room and the humidity control section (45b) disposed in the exhaust passage (32) for discharging air to the outside are connected, A humidity control apparatus comprising an absorbent circuit (15) in which a liquid absorbent circulates so that one of the humidity control sections (45a, 45b) releases moisture and the other absorbs moisture,
In the absorbent circuit (15), the liquid absorbent that flows out of the moisture-control part (45a, 45b) on the moisture absorption side and is supplied to the humidity control part (45a, 45b) on the moisture-release side receives heat from sunlight. A humidity control device characterized by being connected to a solar heat collector (18) for heating by use. In claim 1,
A heating unit (44, 46a, 46b) that heats the liquid absorbent that flows out of the solar heat collector (18) and is supplied to the humidity control unit (45a, 45b) on the moisture release side is provided. Humidity control device. In claim 2,
An air supply side heat exchange section (46a) for exchanging heat between the liquid absorbent and refrigerant in the humidity control section (45a) on the air supply passage side, and a liquid absorbent and refrigerant in the humidity control section (45b) on the exhaust passage side Is connected to the exhaust side heat exchange part (46b), and one of the air supply side heat exchange part (46a) and the exhaust side heat exchange part (46b) is a heat dissipation part as the heating part, and the other is the above A refrigerant circuit (35) in which the circulation direction of the refrigerant is configured to be reversible so as to be an evaporation unit that cools the liquid absorbent supplied to the moisture adjustment unit (45a, 45b) on the moisture absorption side;
The humidity control apparatus, wherein the absorbent circuit (15) is provided with a switching section (17) for switching a circulation direction of the liquid absorbent. In claim 2,
An air supply side heat exchange section (46a) for exchanging heat between the liquid absorbent and refrigerant in the humidity control section (45a) on the air supply passage side, and a liquid absorbent and refrigerant in the humidity control section (45b) on the exhaust passage side Is connected to the exhaust side heat exchange part (46b), and one of the air supply side heat exchange part (46a) and the exhaust side heat exchange part (46b) is a heat dissipation part as the heating part, and the other is the above A refrigerant circuit (35) in which the circulation direction of the refrigerant is configured to be reversible so as to be an evaporation unit that cools the liquid absorbent supplied to the moisture adjustment unit (45a, 45b) on the moisture absorption side;
The absorbent circuit (15) includes a circulation pump (16) for circulating the liquid absorbent in one direction, and a collector bypass flow path (22) connected in parallel with the solar collector (18). A humidity control device characterized by that. In claim 2,
The heating part (44, 46a, 46b) heats the liquid absorbent before flowing out of the solar heat collector (18) and flowing into the humidity control part (45a, 45b) on the moisture release side. Configured,
In the absorbent circuit (15), the liquid absorbent heated by the heating section (44, 46a, 46b) is supplied to the humidity control section (45a) on the supply passage side or the humidity control section (45b) on the exhaust passage side. ) Is connected in parallel with the solar collector (18), which switches the circulation direction of the liquid absorbent, and is heated by the heating unit (44, 46a, 46b). A collector bypass flow path (22) for supplying the liquid absorbent to the humidity control section (45a, 45b) on the moisture release side by bypassing the solar collector (18); Humidity control device characterized by. In any one of Claims 1 to 5,
The humidity control part arranged in the air supply passage (31) constitutes a dehumidification part (45a) for dehumidifying the air into the room, and the humidity control part arranged in the exhaust passage (32) Configure the regenerating part (45b) to release moisture,
The absorbent circuit (15) includes a dehumidifying operation for circulating the liquid absorbent between the dehumidifying unit (45a) and the regenerating unit (45b), and the dehumidifying unit (45a) bypassing the regenerating unit (45b). And a dehumidifying unit bypass circuit (25) for switching between the regeneration operation for circulating the liquid absorbent between the solar heat collector (18) and the solar heat collector (18). In claim 6,
A humidity control apparatus comprising: a control unit (16a) that stops the circulation pump (16) when the concentration of the liquid absorbent reaches a predetermined value during the regeneration operation. In claim 6 or 7,
A humidity control apparatus comprising a tank (29) for storing a liquid absorbent during the regeneration operation.

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