JP2013064553A - Humidity controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently control humidity in a room while suppressing an energy consumption amount in a humidity controller.SOLUTION: A humidity controller (10) includes two humidity control parts (40a, 40b) in which moisture is transferred between air and a liquid absorbent, an absorbent circuit (30) which has a circulation pump (31), and which allows the liquid absorbent to circulate between both moisture control parts (40a, 40b) so that one (40a, 40b) of the two humidity control parts releases humidity to air and the other (40a, 40b) absorbs humidity from air, and a refrigerant circuit (35) to which a compressor (36), a heat releasing part (46a, 46b), and an evaporation part (46a, 46b) are connected to perform refrigeration cycle, and switches and performs normal operation for operating the compressor (36) and the circulation pump (31) and compressor stop operation for operating the circulation pump (31) while the compressor (36) is stopped. The two operations are switched according to a latent heat load.

Description

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

  Conventionally, a humidity control apparatus including a liquid absorbent such as an aqueous lithium chloride solution and a moisture permeable membrane that allows only water vapor to permeate without allowing the liquid absorbent to permeate is known.

  For example, Patent Document 1 discloses a humidity control apparatus including a circulation path (absorbent circuit) through which a liquid absorbent circulates by a pump (circulation pump) and a refrigeration apparatus that performs a refrigeration cycle (Patent Document 1). 1 paragraphs [0031]-[0033] and FIG. 8). This humidity control apparatus includes a dehumidifying unit and a regenerating unit. In the dehumidifying section, the air passage on the dehumidifying side provided with the fan is partitioned from the passage of the liquid absorbent by the moisture permeable membrane. On the other hand, in the regeneration unit, the air passage on the regeneration side provided with the fan is partitioned from the passage of the liquid absorbent by the moisture permeable membrane.

  The refrigerant circuit of the refrigeration apparatus includes a compressor, a condenser disposed in a passage through which the liquid absorbent flows from the dehumidifying unit toward the regenerating unit, a flow rate adjusting valve, and the liquid absorbent from the regenerating unit toward the dehumidifying unit. And an evaporator disposed in a passage through which the gas flows.

  In the humidity control apparatus of Patent Document 1, a circulation pump and a compressor are driven. When the circulation pump is driven, the liquid absorbent circulates through the absorbent circuit, and when the compressor is driven, the refrigerant circulates through the refrigerant circuit. The refrigerant flowing through the condenser heats the liquid absorbent flowing toward the regeneration unit and increases the water vapor partial pressure of the liquid absorbent. This promotes moisture release from the liquid absorbent having a high water vapor partial pressure to the air flowing through the regeneration-side air passage.

  The liquid absorbent having a high concentration due to moisture discharge flows to the evaporator. The refrigerant flowing through the evaporator cools the high-concentration liquid absorbent flowing toward the dehumidifying section to reduce the water vapor partial pressure of the liquid absorbent. If it carries out like this, since the air which flows through the air channel | path by the side of dehumidification is absorbed by the liquid absorbent with which water vapor partial pressure became low, dehumidification in a room | chamber interior is accelerated | stimulated. The liquid absorbent having a low concentration due to moisture absorption again flows into the condenser.

JP 05-146627 A

  By the way, when performing humidity control by driving both the circulation pump and the compressor as described above, a means for adjusting the latent heat treatment capability of the humidity control device by adjusting the rotation speed of the compressor by inverter control is known. ing. However, under the condition where the latent heat load is relatively low, the latent heat treatment capacity may greatly exceed the latent heat load even if the above-described means is used. In this case, the humidity control apparatus is driven with an unnecessarily high capacity, so that useless energy is consumed. In addition, when the circulation pump and the compressor are operated according to the latent heat load, both the circulation pump and the compressor are operated while being repeatedly started and stopped. It causes discomfort due to unevenness.

  This invention is made | formed in view of this point, The objective is to fully humidity-control a room | chamber interior, suppressing the energy consumption in a humidity control apparatus as much as possible.

  The first invention is directed to a humidity control apparatus, and is provided with a humidity control section (40a) on the air supply side for transferring moisture between air supplied to the room and the liquid absorbent, and air discharged to the outside. A humidity control unit (40b) on the exhaust side that exchanges moisture with the liquid absorbent and a circulation pump (31), and one of the two humidity control units (40a, 40b) An absorbent circuit (30) in which the liquid absorbent circulates between both humidity control sections (40a, 40b) so that the other humidity control section (40a, 40b) absorbs moisture from the air. The refrigerant circuit (35) in which the compressor (36), the heat radiating section (46a, 46b) and the evaporation section (46a, 46b) are connected, and the refrigerant is circulated to perform a refrigeration cycle, and the compressor (36) And the circulation pump (31) is operated to heat the liquid absorbent supplied to the humidity control section (40a, 40b) on the moisture release side by the refrigerant of the heat radiating section (46a, 46b) and to the evaporation section (46a, 46b). 46b) A normal operation for cooling the liquid absorbent supplied to the humidity control section (40a, 40b) on the moisture absorption side, and a compressor stop operation for operating the circulation pump (31) while stopping the compressor (36) And a switching determination unit (47) that switches according to the latent heat load.

  In the first aspect of the invention, the humidity control apparatus switches between normal operation and compressor stop operation.

  In normal operation, the compressor (36) and the circulation pump (31) are operated. As a result, the liquid absorbent circulates in the absorbent circuit (30) while the refrigeration cycle in the refrigerant circuit (35) is performed.

  Specifically, during normal operation, the liquid absorbent supplied to the moisture-control section (40a, 40b) on the moisture release side is heated by the heat dissipation section (46a, 46b), and the water vapor partial pressure is increased. Thereby, in the humidity control part (40a, 40b) on the moisture release side, moisture is released from the liquid absorbent to the air. When the humidity control part on the moisture release side is the humidity control part (40a) on the air supply side, the air supply to the room is humidified, and the humidity control part on the moisture release side is the humidity control part (40b) on the exhaust side If this is the case, moisture is discharged outside the room. In addition, the liquid absorbent has a high concentration of the absorbent because the amount of water decreases due to moisture release.

  The high-concentration liquid absorbent that has flowed out of the moisture releasing part (40a, 40b) is supplied to the moisture absorbing part (40a, 40b). This liquid absorbent is cooled by the evaporation sections (46a, 46b), and the water vapor partial pressure is lowered. As a result, the liquid absorbent absorbs moisture from the air in the humidity adjustment section (40a, 40b) on the moisture absorption side. When the moisture adjustment part on the moisture absorption side is the humidity adjustment part (40a) on the air supply side, the air supply to the room is dehumidified, and the humidity adjustment part on the moisture absorption side is the humidity adjustment part (40b) on the exhaust side In this case, the absorbed air is discharged outside the room. Moreover, since the liquid absorbent has a moisture content that increases due to moisture absorption, the concentration of the liquid absorbent decreases. This low-concentration liquid absorbent is supplied again to the humidity control section (40a, 40b) on the moisture release side and dehumidifies into the air.

  In the normal operation, by operating the compressor (36) and performing the refrigeration cycle in the refrigerant circuit (35), the liquid absorbent supplied to the humidity control section (40a, 40b) on the moisture release side is supplied to the heat dissipation section ( 46a, 46b), the water vapor partial pressure of the liquid absorbent can be increased, and moisture release from the liquid absorbent can be promoted. In addition, since the liquid absorbent supplied to the humidity control section (40a, 40b) on the moisture absorption side can be cooled by the evaporation section (46a, 46b), the water vapor partial pressure of the liquid absorbent is reduced, and the liquid absorbent Moisture absorption from the air can be promoted. Accordingly, the latent heat processing capability in the humidity control apparatus (10) is relatively high.

  On the other hand, during the compressor stop operation, the circulation pump (31) is operated while the compressor (36) is stopped. Thereby, the liquid absorbent circulates in the absorbent circuit (30) in a state where the refrigeration cycle in the refrigerant circuit (35) is not performed.

  Specifically, during the compressor stop operation, the liquid absorbent supplied to the humidity control section (40a, 40b) on the moisture release side releases moisture to the air. At this time, since the amount of water in the liquid absorbent is reduced, the concentration of the liquid absorbent is increased.

  The liquid absorbent having a high concentration absorbs moisture from the air in the humidity adjusting section (40a, 40b) on the moisture absorption side. At this time, since the amount of water in the liquid absorbent increases, the concentration of the liquid absorbent decreases. The liquid absorbent having a low concentration is supplied again to the humidity control section (40a, 40b) on the moisture release side, and is released into the air.

  In the compressor stop operation, compared to the normal operation, the liquid absorbent supplied to the moisture release side humidity control section (40a, 40b) is heated and the moisture absorption side humidity control section (40a, 40b) Cooling of the liquid absorbent supplied to is not performed. Therefore, although the processing capacity of the latent heat in the humidity control apparatus (10) is reduced, energy for driving the compressor (36) is not required.

  In the first invention, switching between the normal operation and the compressor stop operation by the switching determination unit (47) is performed according to the latent heat load.

  According to a second aspect, in the first aspect, the switching determination unit (47) determines that the indoor humidity (RHr) reaches the target humidity (RHrs) during the normal operation from the normal operation to the compression. It is a necessary condition for switching to machine stop operation.

  If the indoor humidity (RHr) has reached the target humidity (RHrs), the room is sufficiently conditioned. In the second aspect of the invention, the switching determination unit (47) sets that the humidity in the room is sufficiently adjusted as a necessary condition for switching from the normal operation to the compressor stop operation.

  According to a third invention, in the second invention, the air supply side humidity control section (40a) is configured to exchange moisture between the air supplied from the outside to the room and the liquid absorbent, When the indoor humidity (RHr) reaches the target humidity (RHrs) and the humidity control load (L) is a predetermined value (W1) or less during the normal operation, the switching determination unit (47) The normal operation is switched to the compressor stop operation. The humidity control load (L) is a load to be controlled by the humidity control apparatus of the present invention and is a load brought into the room together with air supply.

  In the third invention, the switching determination unit (47) compresses from the normal operation when the humidity adjustment load (L) brought into the room by the supply air is relatively small in a state where the room is sufficiently conditioned. Switch to machine stop operation.

  In a fourth aspect based on the third aspect, the switching determination unit (47) is configured such that the indoor humidity (RHr) reaches the target humidity (RHrs) during the normal operation and the humidity control load (L) However, when it is below the processing capacity (W) of the humidity control section (40a, 40b) during the compressor stop operation, the normal operation is switched to the compressor stop operation.

  In the fourth invention, the switching determination unit (47) is configured so that the processing capacity (W) of the humidity control unit (40a, 40b) during the compressor stop operation is in an air supply state in a state where the humidity is sufficiently adjusted in the room. In addition, when the humidity control load (L) is not less than that brought into the room, the normal operation is switched to the compressor stop operation.

  According to a fifth invention, in any one of the first to fourth inventions, the humidity (AHs) of air supplied to the room through the supply-side humidity control section (40a) during the compressor stop operation. ), A circulation pump control unit (32) for controlling the discharge amount of the circulation pump (31).

  In the fifth invention, during the compressor stop operation, the discharge amount of the circulation pump (31) is controlled according to the humidity (AHs) of the air supplied to the room.

  According to a sixth aspect of the present invention, the switching determination unit (47) is configured such that the humidity (AHs) of air supplied to the room through the humidity control unit (40a) on the supply side during the compressor stop operation is the target humidity. When deviating from (AHss), switching from the compressor stop operation to the normal operation is performed. The target humidity (AHss) may have a predetermined width.

  In the sixth aspect of the invention, switching is performed when the humidity (AHs) of the supply air deviates from the target humidity (AHss) during the compressor stop operation, that is, when the latent heat cannot be sufficiently processed in the compressor stop operation. The determination unit (47) switches from the compressor stop operation to the normal stop operation.

  According to the first invention, switching between the normal operation and the compressor stop operation is performed according to the latent heat load. In this way, when the latent heat load is relatively high, normal operation can increase the latent heat processing capacity to sufficiently control the humidity in the room. On the other hand, when the latent heat load is relatively low, the compression is performed. By performing the machine stop operation, energy for driving the compressor can be reduced. Accordingly, the room can be fully conditioned while reducing energy consumption.

  Further, according to the second invention, the compressor stop operation is performed in a state where the room is sufficiently conditioned, so that the room can be sufficiently conditioned even in the compressor stop operation.

  According to the third invention, when the humidity in the room is sufficiently conditioned, the load brought into the room by the air supply, which is the humidity adjustment target of the humidity control section (40a, 40b), is relatively small. The normal operation is switched to the compressor stop operation. If it carries out like this, humidity control load (L) can be processed only by the drive of a circulation pump (31), and the energy for driving a compressor (36) can be reduced. Accordingly, the room can be fully conditioned while reducing energy consumption.

  According to the fourth invention, when the latent heat load capability of the humidity control section (40a, 40b) during the compressor stop operation is equal to or higher than the humidity control load (L), the normal operation is switched to the compressor stop operation. . Therefore, the humidity control load (L) can be sufficiently processed only by driving the circulation pump (31).

  According to the fifth aspect of the present invention, the latent heat processing capacity can be adjusted to some extent by adjusting the discharge amount of the circulation pump (31) even during the compressor stop operation where the latent heat processing capacity is relatively low. .

  Further, according to the sixth aspect of the present invention, when the latent heat in the room cannot be processed in the compressor stop operation, the compressor stop operation is switched to the normal operation. Therefore, switching from the compressor stop operation to the normal operation is performed. It can be done at an appropriate time.

FIG. 1 is a plan view illustrating a schematic structure of the humidity control apparatus according to the first embodiment. FIG. 2 is a circuit diagram illustrating configurations of an absorbent circuit and a refrigerant circuit provided in the humidity control apparatus of the first embodiment. FIG. 3 is a schematic perspective view illustrating the humidity control module of Embodiment 1 with a part thereof omitted. FIG. 4 is a schematic cross-sectional view illustrating a horizontal cross section of the humidity control module according to the first embodiment. FIG. 5 is a schematic perspective view illustrating the humidity control module of Embodiment 1 with a part thereof omitted. FIG. 6 is a schematic exploded perspective view illustrating the humidity control module of Embodiment 1 with a part thereof omitted. 7A and 7B are diagrams showing an inner member provided in the humidity control module of Embodiment 1, wherein FIG. 7A is a schematic perspective view, and FIG. 7B is a schematic cross-sectional view showing a horizontal section thereof. FIG. 8 is a block diagram illustrating a configuration of the compressor control unit according to the first embodiment. FIG. 9 is a graph showing the relationship between the temperature difference (ΔT) between the outside and the room and the processing capacity (W). FIG. 10 is a flowchart at the time of dehumidifying operation in the humidity control apparatus of the first embodiment. FIG. 11 is a flowchart at the time of a humidifying operation in the humidity control apparatus of the first embodiment. FIG. 12 is a block diagram illustrating a configuration of a compressor control unit according to the second embodiment. FIG. 13 is a flowchart at the time of dehumidifying operation in the humidity control apparatus of the second embodiment. FIG. 14 is a flowchart at the time of dehumidifying operation in the humidity control apparatus of the third 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 a casing (20) as shown in FIG. The casing (20) accommodates an absorbent circuit (30), a refrigerant circuit (35), an air supply fan (27), and an exhaust fan (28).

  The casing (20) is formed in a rectangular parallelepiped box shape. In the casing (20), an outside air suction port (21) and an exhaust port (24) are formed on one end surface, and an inside air suction port (23) and an air supply port (22) are formed on the other end surface. ing. The internal space of the casing (20) is partitioned into an air supply passage (25) and an exhaust passage (26). The air supply passage (25) communicates with the outside air suction port (21) and the air supply port (22). An air supply fan (27) and an air supply side module (40a) are arranged in the air supply passage (25). On the other hand, the exhaust passage (26) communicates with the inside air suction port (23) and the exhaust port (24). An exhaust fan (28) and an exhaust side module (40b) are arranged in the exhaust passage (26).

  As shown in FIG. 2, the absorbent circuit (30) is a closed circuit in which an air supply side module (40a), an exhaust side module (40b), and a circulation pump (31) are connected. In the absorbent circuit (30), the discharge side of the circulation pump (31) is connected to the inlet of the absorbent passage (41b) of the exhaust side module (40b), and the outlet of the absorbent passage (41b) of the exhaust side module (40b). The inlet of the absorbent passage (41a) of the supply side module (40a) and the outlet of the absorbent passage (41a) of the supply side module (40a) are connected to the suction side of the circulation pump (31), respectively. . The absorbent circuit (30) is filled with an aqueous lithium chloride solution as a liquid absorbent.

  The refrigerant circuit (35) is a closed circuit in which a compressor (36), a four-way switching valve (37), an expansion valve (38), an air supply side module (40a), and an exhaust side module (40b) are connected. 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 heat transfer member (46b) of the exhaust side module (40b) and the expansion valve (38) in order from the third port to the fourth port of the four-way switching valve (37). ) And the heat transfer member (46a) of the air supply side module (40a). 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) is switched between a first state (state indicated by a solid line in FIG. 2) and a second state (state indicated by a broken line in FIG. 2). 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.

  Moreover, the humidity control apparatus (10) is provided with the compressor control part (47) as a switching determination part, and the circulation pump control part (32).

  The compressor control unit (47) compresses in accordance with detection values from a plurality of temperature sensors (81, 83, 85) and detection values from a plurality of humidity sensors (82, 84, 86), which will be described in detail later. Start or stop the machine (36).

  The circulation pump control unit (32) controls the circulation pump (31) according to the absolute humidity (AHs) of the air supply to the room during the compressor stop dehumidification operation or the compressor stop humidification operation described in detail later. The discharge amount is controlled. The absolute humidity (AHs) of the supply air is calculated based on the detection value of the supply air temperature sensor (83) and the detection value of the supply air humidity sensor (84).

-Configuration of humidity control module-
Both the air supply side module (40a) and the exhaust side module (40b) are configured by a humidity control module (40) as a humidity control unit. 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).

  As shown in FIG. 3, 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. 3 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. 4, 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. 5 and 7, the inner member (60) is formed in a hollow rectangular parallelepiped shape whose both ends are open. 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. 4, 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. 4, 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) arranged 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. 4, the inner space of the inner member (60) communicates with the outside through the vent 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 (25) or the exhaust passage (26) of the humidity control device (10) flows. In the humidity control module (40), 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 (30) flows. Therefore, the moisture permeable membrane (62) has a surface in contact with air flowing through the air passage (42) and a back surface in contact with the liquid absorbent flowing in the absorbent circuit (30).

  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 supply side module (40a) includes an outside air temperature sensor (81) and an outside air humidity sensor (82) as shown in FIG. The outdoor air temperature sensor (81) is for detecting the temperature of outdoor air, and the outdoor air humidity sensor (82) is for detecting the relative humidity of outdoor air. Both the outside air temperature sensor (81) and the outside air humidity sensor (82) are disposed upstream of the portion of the air supply passage (25) where the inner member (60) is disposed. The air supply side module (40a) includes an air supply temperature sensor (83) and an air supply humidity sensor (84). The supply air temperature sensor (83) is for detecting the temperature of the supply air into the room, and the supply air humidity sensor (84) is for detecting the relative humidity of the supply air into the room. . The supply air temperature sensor (83) and the supply air humidity sensor (84) are both disposed downstream of the portion of the supply passage (25) where the inner member (60) is disposed.

  As shown in FIG. 2, the exhaust-side module (40b) includes an inside air temperature sensor (85) and an inside air humidity sensor (86). The indoor air temperature sensor (85) is for detecting the temperature of indoor air, and the indoor air humidity sensor (86) is for detecting the relative humidity of indoor air. Both the inside air temperature sensor (85) and the inside air humidity sensor (86) are arranged upstream of the portion of the exhaust passage (26) where the inner member (60) is arranged.

  The detection values of the temperature sensors (81, 83, 85) and the humidity sensors (82, 84, 86) are transmitted to the compressor controller (47) as needed. Further, the detection value of the supply air temperature sensor (83) and the detection value of the supply air humidity sensor (84) are transmitted to the circulation pump control unit (32) at any time during the compressor stop operation.

  As shown in FIG. 6, 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. 4). 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 module (40). 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).

-Configuration of compressor control unit-
The compressor control unit (47) receives the detection values detected by the plurality of temperature sensors (81, 83, 85) and the humidity sensors (82, 84, 86), and based on the detection values, the compressor ( 36) is configured to control.

  As shown in FIG. 8, the compressor control unit (47) includes a stop control unit (48) and an activation control unit (49). The stop control unit (48) and the start control unit (49) are configured to perform different operations during the dehumidifying operation and the humidifying operation of the humidity control apparatus (10).

  The stop control unit (48) stops the compressor (36) being driven based on the detection values of the sensors (81 to 86). The stop control unit (48) includes a first determination unit (48a), a second determination unit (48b), and a command unit (48c).

  The first determination unit (48a) compares the detected value (Tr) of the inside air temperature sensor (85) with the target temperature (Trs) and detects the detected value (RHr) of the inside air humidity sensor (86) and the target relative value. Compare with humidity (RHrs).

  During the dehumidifying operation, in the first determination unit (48a), the detected value (Tr) of the inside air temperature sensor (85) is equal to or lower than the target temperature (Trs) and the detected value (RHr) of the inside air humidity sensor (86) ) Is determined to be equal to or lower than the target relative humidity (RHrs), next, determination by the second determination unit (48b) is performed. When at least one of the detected values (Tr, RHr) exceeds the target value (Trs, RHrs), the determination by the first determination unit (48a) is performed again after a predetermined time has elapsed. The target temperature (Trs) here is determined based on the set temperature of an air conditioner (not shown) that is operated simultaneously with the humidity control device (10). For example, when the set temperature of the air conditioner that performs the cooling operation is set to 27 ° C., the target temperature (Trs) is set to a value slightly higher than 27 ° C. The target relative humidity (RHrs) here is determined based on the set humidity of the humidity control apparatus (10). For example, when the set relative humidity of the humidity controller (10) is set to 50%, the target relative humidity (RHrs) is set to a value slightly higher than 50%.

  On the other hand, during the humidifying operation, the detected value (Tr) at the inside air temperature sensor (85) is equal to or higher than the target temperature (Trs) and the detected value at the inside air humidity sensor (86) in the first determination unit (48a). If it is determined that (RHr) is equal to or higher than the target relative humidity (RHrs), then determination by the second determination unit (48b) is performed. When at least one of the detection values (Tr, RHr) is below the target value (Trs, RHrs), the determination by the first determination unit (48a) is performed again after a predetermined time has elapsed. The target temperature (Trs) here is determined based on the set temperature of an air conditioner (not shown) that is operated simultaneously with the humidity control apparatus (10). For example, when the set temperature of the air conditioner that performs the heating operation is set to 20 ° C., the target temperature (Trs) is set to a value slightly lower than 20 ° C. The target relative humidity (RHrs) here is determined based on the set humidity of the humidity control apparatus (10). For example, when the set relative humidity of the humidity controller (10) is set to 50%, the target relative humidity (RHrs) is set to a value slightly lower than 50%.

  The second determination unit (48b) calculates the processing capacity (W) from the detected value (To) of the outside air temperature sensor (81) and the detected value (Tr) of the inside air temperature sensor (85), and the absolute humidity of the outside air. The humidity control load (L) is calculated based on the humidity difference (ΔAH) between (AHo) and the absolute humidity (AHr) of the inside air, the air volume of the air supply fan (27), and the like. Here, the humidity control load (L) is a load to be controlled by the humidity control apparatus (10), and is a load brought into the room together with air supply. Specifically, when the dehumidifying operation is performed by the humidity control device (10), the humidity control load (L) is the dehumidifying load, and when the humidifying operation is performed by the humidity control device (10). The humidity adjustment load (L) is a humidification load. The absolute humidity (AHo) of the outside air is calculated from the detection value (To) of the outside air temperature sensor (81) and the detection value (RHo) of the outside air humidity sensor (82). The absolute humidity (AHr) of the inside air is It is calculated from the detection value (Tr) of the temperature sensor (85) and the detection value (RHr) of the room air humidity sensor (86).

  Moreover, the table A is memorize | stored in the 2nd determination part (48b). A graph plotting the table A is shown in FIG. This table A indicates how much latent heat treatment is possible in the compressor stop operation based on the detected value (To) of the outside air temperature sensor (81) and the detected value (Tr) of the inside air temperature sensor (85). Is. The relationship between the outdoor temperature (To) and the indoor temperature (Tr) and the processing capacity (W) will be described. For example, when the supply side module (40a) is on the moisture absorption side, if the outdoor temperature (To) is relatively high, The temperature of the liquid absorbent flowing out from the supply side module (40a) becomes relatively high. That is, the temperature of the liquid absorbent flowing into the exhaust side module (40b) becomes relatively high, and moisture release in the exhaust side module (40b) is promoted. Thereby, a high concentration liquid absorbent is supplied to the air supply side module (40a), and a dehumidification capability becomes high. On the other hand, if the room temperature (Tr) is relatively low, the temperature of the liquid absorbent flowing out from the exhaust side module (40b) is relatively low. That is, the temperature of the liquid absorbent flowing into the air supply side module (40a) becomes relatively low, and the water vapor partial pressure of the liquid absorbent in the air supply side module (40a) is reduced to increase the dehumidification capability. Therefore, the higher the outdoor temperature (To) and the lower the indoor temperature (Tr) (and hence the greater the temperature difference (ΔT) between the room and the outdoors), the greater the processing capacity (W) during compressor stop operation. Will grow. Thus, there is a certain degree of correlation between the outdoor temperature (To) and the indoor temperature (Tr) and the processing capacity (W). According to this table A, the outdoor temperature (To) and the indoor temperature ( Based on Tr), it is possible to calculate the humidity control load (processing capacity (W)) that can be processed in the compressor stop operation.

  In both the dehumidifying operation and the humidifying operation, the second determination unit (48b) determines whether or not the calculated processing capacity (W) is equal to or higher than the humidity control load (L). When the processing capacity (W) is equal to or higher than the humidity control load (L), a compressor stop signal Soff is transmitted from the command section (48c) to the compressor (36).

  The activation control unit (49) includes a determination unit (49a) and a command unit (49b).

  The determination unit (49a) compares the absolute humidity (AHs) of the supply air with the target absolute humidity (AHss). The absolute humidity (AHs) of the supply air is calculated from the detection value (Ts) of the supply air temperature sensor (83) and the detection value (RHs) of the supply air humidity sensor (84).

  During dehumidifying operation, if the determination unit (49a) determines that the absolute humidity (AHs) of the supply air is greater than or equal to the target absolute humidity (AHss), the compressor starts from the command unit (49b) to the compressor (36) Signal Son is transmitted. The target absolute humidity (AHss) is determined based on the set temperature of the air conditioner and the set humidity of the humidity controller (10).

  During humidification operation, if the determination unit (49a) determines that the absolute humidity (AHs) of the supply air is equal to or lower than the target absolute humidity (AHss), it is compressed from the command unit (49b) to the compressor (36). A machine start signal Son is transmitted.

-Operation of humidity control device-
The operation of the humidity controller (10) will be described. The humidity control apparatus (10) selectively performs a dehumidifying operation for dehumidifying the air supply to the room and a humidifying operation for humidifying the air supply to the room. In the dehumidifying operation, a normal dehumidifying operation that operates the compressor (36) and the circulation pump (31) and a compressor dehumidifying operation that operates the circulation pump (31) while the compressor (36) is stopped are switched. Is called. On the other hand, in the humidification operation, the normal humidification operation for operating the compressor (36) and the circulation pump (31) and the compressor stop humidification operation for operating the circulation pump (31) while stopping the compressor (36) are switched. Done.

<Dehumidifying operation>
The dehumidifying operation of the humidity control apparatus (10) will be described with reference to FIG. During the dehumidifying operation, the four-way switching valve (37) of the refrigerant circuit (35) is set to the first state (that is, the state shown by the solid line in FIG. 2).

-Normal dehumidification operation-
In the normal dehumidifying operation, both the compressor (36) and the circulation pump (31) are operated.

  When the compressor (36) is operated, a vapor compression refrigeration cycle is performed by circulating the refrigerant in the refrigerant circuit (35) during the dehumidifying operation. Further, in the refrigerant circuit (35) during the dehumidifying operation, the heat transfer member (46b) of the exhaust side module (40b) serves as a heat dissipation unit, and the heat transfer member (46a) of the supply side module (40a) serves as an evaporation unit. .

  The refrigerant flow in the refrigerant circuit (35) will be described in detail. The high-temperature and high-pressure gas refrigerant discharged from the compressor (36) passes through the four-way switching valve (37) and is supplied to the exhaust-side module (40b) as a heating heat medium. The refrigerant flowing into the heat transfer member (46b) of the exhaust side module (40b) dissipates heat and condenses to the liquid absorbent flowing in the absorbent passage (41b) of the exhaust side module (40b), and then the exhaust side module ( 40b). The refrigerant flowing out of the exhaust side module (40b) is reduced in pressure when passing through the expansion valve (38) to become a low-pressure refrigerant in a gas-liquid two-phase state, and supplied to the supply side module (40a) as a cooling heat medium. Is done. The refrigerant flowing into the heat transfer member (46a) of the air supply side module (40a) absorbs heat from the liquid absorbent flowing through the absorbent passage (41a) of the air supply side module (40a) and evaporates, and then supplies air Outflow from the side module (40a). The refrigerant flowing out from the supply side module (40a) 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.

  In the normal dehumidifying operation, the circulation pump (31) of the absorbent circuit (30) is operated, and the liquid absorbent circulates in the absorbent circuit (30).

  The liquid absorbent discharged from the circulation pump (31) flows into the absorbent passage (41b) of the exhaust side module (40b). The liquid absorbent that has flowed into the absorbent passage (41b) is heated by the refrigerant flowing through the heat transfer member (46b) as the heat radiating section. The heated liquid absorbent has an increased water vapor partial pressure. On the other hand, in the air passage (42) of the exhaust module (40b), exhaust (that is, indoor air exhausted outside the room) flows. In the exhaust side module (40b), a part of the water contained in the liquid absorbent becomes water vapor, passes through the moisture permeable membrane (62), and is given to the exhaust flowing through the air passage (42) of the exhaust side module (40b) Is done. The water vapor imparted to the exhaust is discharged to the outside together with the exhaust. Thus, in the exhaust side module (40b), a 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. Accordingly, in the exhaust side module (40b), the concentration of the liquid absorbent gradually increases while passing through the absorbent passage (41b).

  The high-concentration liquid absorbent flowing out from the exhaust side module (40b) flows into the absorbent passage (41a) of the air supply side module (40a). The liquid absorbent that has flowed into the absorbent passage (41a) is cooled by the refrigerant flowing through the heat transfer member (46a) as the evaporation section. The cooled liquid absorbent has a reduced water vapor partial pressure. On the other hand, in the air passage (42) of the supply side module (40a), supply air (that is, outdoor air supplied to the room) flows. In the air supply side module (40a), 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 module (40a), a 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. Accordingly, in the supply side module (40a), the concentration of the liquid absorbent gradually decreases while passing through the absorbent passage (41a). The low-concentration liquid absorbent flowing out from the supply side module (40a) is sucked into the circulation pump (31) and sent out toward the exhaust side module (40b).

  In this normal dehumidifying operation, moisture from air is given to the liquid absorbent supplied to the supply side module (40a) by operating the compressor (36) and performing the refrigeration cycle in the refrigerant circuit (35). It becomes easy, and moisture is easily given to air from the liquid absorbent supplied to the exhaust side module (40b). That is, in this normal dehumidifying operation, energy for driving the compressor (36) is required, but the humidity control capacity of the humidity control device (10) is high.

−Compressor dehumidification operation−
In the compressor dehumidifying operation, the circulation pump (31) is driven with the compressor (36) stopped. During the compressor stop dehumidifying operation, the refrigerant does not circulate in the refrigerant circuit (35), so the vapor compression refrigeration cycle is not performed.

  In the compressor stop dehumidifying operation, as in the case of the normal dehumidifying operation, the circulation pump (31) of the absorbent circuit (30) is driven, and the liquid absorbent circulates in the absorbent circuit (30).

  The liquid absorbent discharged from the circulation pump (31) flows into the absorbent passage (41b) of the exhaust side module (40b). In the exhaust side module (40b), a part of the water contained in the liquid absorbent becomes water vapor, passes through the moisture permeable membrane (62), and is given to the exhaust flowing through the air passage (42). In particular, when the room is cooled in summer or the like, the temperature of the exhaust flowing from the room to the outside is relatively low, so the water vapor partial pressure of the exhaust is relatively low. Therefore, moisture contained in the liquid absorbent is easily given to the exhaust. The water vapor imparted to the exhaust is discharged to the outside together with the exhaust.

  Thus, in the exhaust side module (40b), a 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. Accordingly, in the exhaust side module (40b), the concentration of the liquid absorbent gradually increases while passing through the absorbent passage (41b).

  The high-concentration liquid absorbent flowing out from the exhaust side module (40b) flows into the absorbent passage (41a) of the air supply side module (40a). In the supply side module (40a), water vapor contained in the supply air passes through the moisture permeable membrane (62) and is absorbed by the high-concentration liquid absorbent flowing through the absorbent passage (41a). In particular, in a hot season such as summer, the temperature of the supply air flowing from the outside to the room is relatively high, so the water vapor partial pressure of the supply air is relatively high. Therefore, the moisture contained in the supply air is easily given to the liquid absorbent. 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 module (40a), a 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. Accordingly, in the supply side module (40a), the concentration of the liquid absorbent gradually decreases while passing through the absorbent passage (41a). The low-concentration liquid absorbent flowing out from the supply side module (40a) is sucked into the circulation pump (31) and sent out toward the exhaust side module (40b).

  In addition, during the compressor dehumidifying operation, the supply air temperature sensor (83) and the supply air humidity sensor (84) transmit their detected values (Ts, RHs) to the circulation pump control unit (32). The circulation pump control unit (32) calculates the supply air absolute humidity (AHs) from these detected values (Ts, RHs). The circulation pump control unit (32) adjusts the discharge amount of the circulation pump (31) according to the supply absolute humidity (AHs). By adjusting the discharge amount of the circulation pump (31) according to the latent heat load of the supply air, the humidity adjustment capability of the supply side module (40a) during the compressor stop operation can be adjusted to some extent.

  In this compressor stop dehumidifying operation, the energy for driving the compressor (36) can be reduced because the compressor (36) is stopped as compared with the case of the normal humidity control operation. However, since the liquid absorbent supplied to the air supply side module (40a) is not cooled and the liquid absorbent supplied to the exhaust side module (40b) is not heated, it is compared with the case of normal humidity control operation. And the humidity control capacity of the humidity control device (10) is low.

<Humidification operation>
In the humidification operation, a normal humidification operation in which the compressor (36) and the circulation pump (31) are operated and a compressor stop humidification operation in which the circulation pump (31) is operated while the compressor (36) is stopped are switched. Is called.

  The humidification operation of the humidity control apparatus (10) will be described with reference to FIG.

  During the humidifying operation, the four-way switching valve (37) of the refrigerant circuit (35) is set to the second state (that is, the state indicated by the broken line in FIG. 2).

-Normal humidification operation-
In the normal humidification operation, both the compressor (36) and the circulation pump (31) are operated.

  When the compressor (36) is operated, a vapor compression refrigeration cycle is performed by circulating the refrigerant in the refrigerant circuit (35) during the humidifying operation. Further, in the refrigerant circuit (35) during the humidifying operation, the heat transfer member (46a) of the supply side module (40a) serves as a heat radiating portion, and the heat transfer member (46b) of the exhaust side module (40b) serves as an evaporation portion. .

  The refrigerant flow in the refrigerant circuit (35) will be described in detail. The high-temperature and high-pressure gas refrigerant discharged from the compressor (36) passes through the four-way switching valve (37) and is supplied to the supply-side module (40a) as a heating medium. The refrigerant flowing into the heat transfer member (46a) of the supply side module (40a) dissipates heat and condenses to the liquid absorbent flowing through the absorbent passage (41a) of the supply side module (40a), and then supplies the air. Outflow from the side module (40a). The refrigerant flowing out from the supply side module (40a) is reduced in pressure when passing through the expansion valve (38) to become a low-pressure refrigerant in a gas-liquid two-phase state, and supplied to the exhaust side module (40b) as a cooling heat medium. Is done. The refrigerant flowing into the heat transfer member (46b) of the exhaust side module (40b) absorbs heat from the liquid absorbent flowing in the absorbent passage (41b) of the exhaust side module (40b) and evaporates, and then the exhaust side module ( 40b). The refrigerant flowing out from the exhaust side module (40b) 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.

  In the normal humidification operation, the circulation pump (31) of the absorbent circuit (30) is operated, and the liquid absorbent circulates in the absorbent circuit (30).

  The liquid absorbent discharged from the circulation pump (31) flows into the absorbent passage (41b) of the exhaust side module (40b). The liquid absorbent that has flowed into the absorbent passage (41b) is cooled by the refrigerant flowing through the heat transfer member (46b) as the evaporation section. On the other hand, in the air passage (42) of the exhaust module (40b), exhaust (that is, indoor air exhausted outside the room) flows. In the exhaust side module (40b), water vapor contained in the exhaust passes through the moisture permeable membrane (62) and is absorbed by the liquid absorbent flowing through the absorbent passage (41b). The exhaust gas deprived of water vapor is then discharged outside the room. Thus, in the exhaust side module (40b), a part of the water vapor contained in the exhaust of the air passage (42) passes through the moisture permeable membrane (62) and is absorbed by the liquid absorbent. Therefore, in the exhaust side module (40b), 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) flows into the absorbent passage (41a) of the air supply side module (40a). The liquid absorbent that has flowed into the absorbent passage (41a) is heated by the refrigerant flowing through the heat transfer member (46a) as the heat radiating section. On the other hand, in the air passage (42) of the supply side module (40a), supply air (that is, outdoor air supplied to the room) flows. In the air supply side module (40a), part of the water contained in the liquid absorbent becomes water vapor, passes through the moisture permeable membrane (62), and is given to the air supply flowing through the air passage (42). The air supply humidified while passing through the air passage (42) of the air supply side module (40a) is supplied to the room thereafter. Thus, in the air supply side module (40a), a 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. Accordingly, in the supply side module (40a), the concentration of the liquid absorbent gradually increases while passing through the absorbent passage (41a). The high-concentration liquid absorbent flowing out from the supply side module (40a) is sucked into the circulation pump (31) and sent out toward the exhaust side module (40b).

  In this normal humidification operation, by operating the compressor (36) and performing the refrigeration cycle in the refrigerant circuit (35), moisture is easily imparted to the air from the liquid absorbent supplied to the supply side module (40a). At the same time, moisture from the air is easily applied to the liquid absorbent supplied to the exhaust-side module (40b). That is, in this normal dehumidifying operation, energy for driving the compressor (36) is required, but the humidity control capacity of the humidity control device (10) is high.

−Compressor stop humidification operation−
In the compressor stop humidification operation, the circulation pump (31) is driven with the compressor (36) stopped. During the compressor stop humidification operation, the refrigerant does not circulate in the refrigerant circuit (35), so the vapor compression refrigeration cycle is not performed.

  In the compressor stop humidification operation, as in the normal humidification operation, the circulation pump (31) of the absorbent circuit (30) is driven, and the liquid absorbent circulates in the absorbent circuit (30).

  The liquid absorbent discharged from the circulation pump (31) flows into the absorbent passage (41b) of the exhaust side module (40b). In the exhaust side module (40b), water vapor contained in the exhaust passes through the moisture permeable membrane (62) and is absorbed by the liquid absorbent flowing through the absorbent passage (41b). In particular, when the room is heated in winter or the like, the temperature of the exhaust flowing from the room to the outside is relatively high, so that the water vapor partial pressure of the exhaust is relatively high. Therefore, moisture contained in the exhaust gas is easily given to the liquid absorbent. The exhaust gas deprived of water vapor is then discharged outside the room.

  Thus, in the exhaust side module (40b), a part of the water vapor contained in the exhaust of the air passage (42) passes through the moisture permeable membrane (62) and is absorbed by the liquid absorbent. Therefore, in the exhaust side module (40b), 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) flows into the absorbent passage (41a) of the air supply side module (40a). In the air supply side module (40a), part of the water contained in the liquid absorbent becomes water vapor, passes through the moisture permeable membrane (62), and is given to the air supply flowing through the air passage (42). In particular, during cold periods such as winter, the temperature of the supply air flowing from the outside to the room is relatively low, so the water vapor partial pressure of the supply air is relatively low. Therefore, the moisture contained in the liquid absorbent is easily given to the supply air. The air supply humidified while passing through the air passage (42) of the air supply side module (40a) is supplied to the room thereafter.

  Thus, in the air supply side module (40a), a 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. Accordingly, in the supply side module (40a), the concentration of the liquid absorbent gradually increases while passing through the absorbent passage (41a). The high-concentration liquid absorbent flowing out from the supply side module (40a) is sucked into the circulation pump (31) and sent out toward the exhaust side module (40b).

  Further, during the compressor stop humidification operation, the supply air temperature sensor (83) and the supply air humidity sensor (84) transmit the detected values (Ts, RHs) to the circulation pump control unit (32). The circulation pump control unit (32) calculates the supply air absolute humidity (AHs) from these detected values (Ts, RHs). The circulation pump control unit (32) adjusts the discharge amount of the circulation pump (31) according to the supply absolute humidity (AHs). By adjusting the discharge amount of the circulation pump (31) according to the absolute humidity of the supply air, the humidity control capability of the supply side module (40a) during the compressor stop humidification operation can be adjusted to some extent.

  In this compressor stop humidification operation, since the compressor (36) is stopped compared to the case of the normal humidity control operation, the energy for driving the compressor (36) can be reduced. However, since the liquid absorbent supplied to the air supply side module (40a) is not cooled and the liquid absorbent supplied to the exhaust side module (40b) is not heated, the humidity controller (10) is not adjusted. Wet capacity is low.

-Operation of humidity control module-
The operation of the humidity control module (40) constituting the supply side module (40a) and the exhaust side module (40b) will be described. The humidity control module (40) selectively performs a moisture absorbing operation for causing the liquid absorbent to absorb water vapor and a moisture releasing operation for releasing the water vapor from the liquid absorbent. During the dehumidifying operation described above, the air supply side module (40a) performs a moisture absorption operation, and the exhaust side module (40b) performs a moisture release operation. Moreover, at the time of the humidification operation mentioned above, the exhaust side module (40b) performs a moisture absorption operation, and the air supply side module (40a) performs a moisture release operation.

<Hygroscopic operation>
The moisture absorption operation of the humidity control module (40) will be described with reference to FIG.

  During the moisture absorption operation, a relatively high concentration liquid absorbent is supplied to the absorbent passage (41) of the humidity control module (40). And a part of water vapor | steam contained in the air of an air path (42) permeate | transmits a moisture-permeable film (62), and is absorbed by the liquid absorbent.

  In the process in which the liquid absorbent absorbs water vapor, heat of absorption is generated. For this reason, if no measures are taken, the temperature of the liquid absorbent gradually rises due to the generated heat of absorption, and the amount of water vapor absorbed by the liquid absorbent decreases. Moreover, when the temperature of the air which flows through an air path (42) is higher than the temperature of a liquid absorbent, the temperature of a liquid absorbent rises by heat exchange with air. On the other hand, in the humidity control module (40) during the moisture absorption operation, the heat transfer member (46) functions as an evaporation section, and the liquid absorbent in the absorbent passage (41) is cooled by the refrigerant in the heat medium passage (43). Therefore, the temperature rise of the liquid absorbent can be suppressed.

  In particular, in the humidity control module (40) of the present embodiment, the heat transfer tube (70) of the heat transfer member (46) is surrounded by the liquid absorbent. For this reason, the refrigerant flowing through the heat transfer tube (70) substantially absorbs heat only from the liquid absorbent. Therefore, in the humidity control module (40) of the present embodiment, the liquid absorbent is efficiently cooled by the refrigerant flowing through the heat transfer tube (70).

<Moisturizing operation>
The moisture release operation of the humidity control module (40) will be described with reference to FIG.

  During the moisture release operation, a relatively low concentration liquid absorbent is supplied to the absorbent passage (41) of the humidity control module (40). 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 air in the air passage (42).

  In the process of releasing water from the liquid absorbent, when the liquid water is vaporized, it takes heat away from the surroundings. For this reason, if no measures are taken, the temperature of the liquid absorbent gradually decreases, and the amount of water vapor released from the liquid absorbent decreases. Moreover, when the temperature of the air which flows through an air path (42) is lower than the temperature of a liquid absorbent, the temperature of a liquid absorbent falls by heat exchange with air. On the other hand, in the humidity control module (40) during the moisture releasing operation, the heat transfer member (46) functions as a heat radiating section, and the liquid absorbent in the absorbent passage (41) is heated by the refrigerant in the heat medium passage (43). Therefore, the temperature drop of the liquid absorbent can be suppressed.

  In particular, in the humidity control module (40) of the present embodiment, the heat transfer tube (70) of the heat transfer member (46) is surrounded by the liquid absorbent. For this reason, the heat released from the refrigerant flowing through the heat transfer tube (70) is substantially given only to the liquid absorbent. Therefore, in the humidity control module (40) of the present embodiment, the liquid absorbent is efficiently heated by the refrigerant flowing through the heat transfer tube (70).

-Switching between normal dehumidifying operation and compressor dehumidifying operation-
Switching between the normal dehumidifying operation and the compressor dehumidifying operation in the dehumidifying operation will be described with reference to the flowchart of FIG.

  In the dehumidifying operation, first, the normal dehumidifying operation is started by operating both the compressor (36) and the circulation pump (31) (step S10). Simultaneously with this dehumidifying operation, a cooling operation is also performed by an air conditioner (not shown). The humidity inside the room approaches the set humidity (for example, 50%) of the humidity controller by the normal humidity control operation, and the room temperature approaches the set temperature (for example, 27 ° C.) of the air conditioner by the cooling operation.

  During the normal dehumidifying operation, the detection value (Tr) of the inside air temperature sensor (85) and the target temperature (Trs) are compared in the first determination unit (48a) of the stop control unit (48), and the inside air humidity sensor ( The detected value (RHr) of 86) is compared with the target relative humidity (RHrs) (step S20). If at least one of the detection values (Tr, RHr) exceeds the target value (Trs, RHrs) (in the case of No in step S20), the determination by the first determination unit (48a) is performed again after a predetermined time has elapsed. Done. On the other hand, if it is determined by the first determination unit (48a) that each detected value (Tr, RHr) is equal to or less than the target value (Trs, RHrs) (Yes in step S20), then the second Determination in the determination unit (48b) is performed.

  In the second determination unit (48b), the processing capacity (W) calculated based on the indoor temperature (Tr) and the outdoor temperature (To), the indoor humidity (AHr), the outdoor humidity (AHo), and the air supply fan The humidity control load (L) calculated based on the air volume of (27) is compared. In step S30, when the processing capacity (W) is lower than the humidity control load (L) (in the case of No in step S30), the process returns to step S20 and the above determination by the second determination unit (48b) is performed again. On the other hand, when the processing capacity (W) is equal to or higher than the humidity control load (L) (No in step S30), the command unit (48c) transmits a compressor stop signal Soff to the compressor (36). Thereby, since the compressor (36) is stopped, the humidity control apparatus (10) performs a compressor stop dehumidification operation (step S40).

  During the compressor dehumidifying operation, the determination unit (49a) of the start control unit (49) compares the absolute humidity (AHs) of the supply air with the target absolute humidity (AHss) (step S50). When the absolute humidity (AHs) of the supply air is equal to or lower than the target absolute temperature (AHss) (in the case of Yes in step S50), the compressor stop dehumidifying operation is continuously performed, and the determination in step S50 is performed again after a predetermined time has elapsed. . On the other hand, when the absolute humidity (AHs) of the supply air exceeds the target absolute humidity (AHss) (in the case of No in step S50), the command unit (49b) transmits a compressor start signal Son to the compressor (36). Thereby, since a compressor (36) is started, a humidity control apparatus performs a normal dehumidification driving | operation (step S50).

  If the indoor relative humidity (RHr) is equal to or lower than the target relative humidity (RHrs) in step S20, it can be considered that the room is sufficiently conditioned. Even if the dehumidifying operation with a low processing capacity is performed in a state where the dehumidification in the room is insufficient, the indoor humidity cannot be sufficiently adjusted. Accordingly, in the dehumidifying operation, the indoor relative humidity (RHr) being equal to or lower than the target relative humidity (RHrs) is a necessary condition for switching from the normal dehumidifying operation to the compressor dehumidifying operation.

  In step S30, when the processing capacity (W) is equal to or higher than the humidity control load (L), the normal dehumidification operation is switched to the compressor stop dehumidification operation. Therefore, even when switching from the normal dehumidifying operation to the compressor dehumidifying operation, the dehumidifying load can be sufficiently processed.

  In step S50, it is determined whether the absolute humidity (AHs) of the supply air is equal to or lower than the target absolute humidity (AHss). When the absolute humidity (AHs) of the supply air is equal to or lower than the target absolute humidity (AHss), the dehumidifying capability of the humidity control apparatus during the compressor dehumidifying operation is maintained, so the compressor dehumidifying operation is continued. On the other hand, if the absolute humidity (AHs) of the supply air is higher than the target absolute humidity (AHss), it can be determined that the dehumidifying capacity of the humidity control device during the compressor dehumidification operation has become insufficient. Switch to normal dehumidification operation.

-Switching between normal humidification operation and compressor stop humidification operation-
Switching between the normal humidification operation and the compressor stop humidification operation in the humidification operation will be described with reference to the flowchart of FIG.

  In the humidification operation, first, the normal humidification operation is started by operating both the compressor (36) and the circulation pump (31) (step S10). At the same time as the humidifying operation, a heating operation is also performed by an air conditioner (not shown). The humidity in the room approaches the set humidity (for example, 50%) of the humidity controller by the normal humidity control operation, and the temperature in the room approaches the set temperature (for example, 20 ° C.) of the air conditioner by the heating operation.

  During the normal humidification operation, the first determination unit (48a) of the stop control unit (48) compares the detected value (Tr) of the inside air temperature sensor (85) with the target temperature (Trs), and the inside air humidity sensor ( The detected value (RHr) of 86) is compared with the target relative humidity (RHrs) (step S20). If at least one of the detected values (Tr, RHr) is lower than the target value (Trs, RHrs) (in the case of No in step S20), the determination by the first determination unit (48a) is performed again after a predetermined time has elapsed. Done. On the other hand, if the first determination unit (48a) determines that each detected value (Tr, RHr) is equal to or greater than the target value (Trs, RHrs) (Yes in step S20), then the second Determination in the determination unit (48b) is performed.

  In the second determination unit (48b), the processing capacity (W) calculated based on the indoor temperature (Tr) and the outdoor temperature (To), the indoor humidity (AHr), the outdoor humidity (AHo), and the air supply fan The humidity control load (L) calculated based on the air volume of (27) is compared. In step S30, when the processing capacity (W) is lower than the humidity control load (L) (in the case of No in step S30), the process returns to step S20 and the above determination by the second determination unit (48b) is performed again. On the other hand, when the processing capacity (W) is equal to or higher than the humidity control load (L) (No in step S30), the command unit (48c) transmits a compressor stop signal Soff to the compressor (36). Thereby, since the compressor (36) is stopped, the humidity control apparatus (10) performs a compressor stop humidification operation (step S40).

  During the compressor stop humidification operation, the determination unit (49a) of the start control unit (49) compares the absolute humidity (AHs) of the supply air with the target absolute humidity (AHss) (step S50). When the absolute humidity (AHs) of the supply air is equal to or higher than the target absolute humidity (AHss) (in the case of Yes in step S50), the compressor stop humidification operation is continued, and the determination in step S50 is performed again after a predetermined time has elapsed. . On the other hand, when the absolute humidity (AHs) of the supply air is lower than the target absolute humidity (AHss) (No in step S50), the command unit (49b) transmits a compressor start signal Son to the compressor (36). To do. Thereby, since a compressor (36) is started, a humidity control apparatus performs normal humidification operation (step S50).

  If the indoor relative humidity (RHr) is equal to or higher than the target relative humidity (RHrs) in step S20, it can be considered that the room is sufficiently conditioned. Even if the humidification operation with a low processing capacity is performed in a state where the humidification in the room is insufficient, the room cannot be fully conditioned. Therefore, in the humidification operation, the indoor relative humidity (RHr) is equal to or higher than the target relative humidity (RHrs), which is a necessary condition for switching from the normal humidification operation to the compressor stop humidification operation.

  In step S30, when the processing capacity (W) is equal to or higher than the humidity control load (L), the normal humidification operation is switched to the compressor stop humidification operation. Therefore, even when switching from the normal humidification operation to the compressor stop humidification operation, the humidification load can be sufficiently processed.

  In Step S50, it is determined whether the absolute humidity (AHs) of the supply air is equal to or higher than the target absolute humidity (AHss). If the absolute humidity (AHs) of the supply air is equal to or higher than the target absolute humidity (AHss), it can be determined that the humidifying capacity of the humidity control device during the compressor-stop humidification operation can be maintained, so the compressor-stop humidification operation is continued. The On the other hand, when the absolute humidity (AHs) of the supply air is lower than the target absolute humidity (AHss), it can be determined that the humidifying capacity of the humidity control device during the compressor stop humidification operation has become insufficient. Switch to normal humidification operation.

-Effect of Embodiment 1-
As described above, in the humidity control apparatus according to the first embodiment, the normal operation and the compressor stop operation are switched according to the latent heat load. In this way, when the latent heat load is relatively high, the room can be sufficiently conditioned by performing the normal humidity control operation, while when the latent heat load is relatively low, the compressor (36) is operated by performing the compressor stop operation. Energy for driving can be reduced. Therefore, the room can be fully conditioned while suppressing the energy consumption in the humidity control apparatus (10) as much as possible.

  Further, in the first embodiment, the condition that the room has reached the target humidity, that is, the room is sufficiently conditioned, is a necessary condition for switching from the normal humidity control operation to the compressor stop operation. . In this way, it is possible to suppress switching from normal operation to compressor stop operation with insufficient humidity control in the room, so it takes a long time to adjust the humidity in the room or the humidity control capacity is insufficient. Can be avoided.

  In the first embodiment, when the processing capacity (W) is equal to or higher than the humidity control load (L), the normal operation is switched to the compressor stop operation. In this way, the latent heat load can be sufficiently processed even when switching from the normal operation to the compressor stop operation. In addition, when the humidity control load (L) is relatively small, the humidity control load (L) can be processed only by driving the circulation pump (31), and the energy for driving the compressor (36) can be reduced. Accordingly, the room can be fully conditioned while reducing energy consumption.

  In the first embodiment, the discharge amount of the circulation pump (31) can be adjusted according to the absolute humidity (AHs) of the supply air during the compressor stop operation. Therefore, the latent heat load that can be processed by the compressor stop operation can be adjusted to some extent by adjusting the discharge amount of the circulation pump (31).

  In the first embodiment, when the absolute humidity (AHs) of the supply air deviates from the target absolute humidity (AHss) during the compressor stop operation, that is, the latent heat treatment capability of the humidity control apparatus (10) that performs the compressor stop operation. The humidity control device (10) is switched from the compressor stop operation to the normal operation. Thereby, switching from the compressor stop operation to the normal operation can be performed at an appropriate timing.

<< Embodiment 2 of the Invention >>
As shown in FIG. 12, the humidity control apparatus (10) according to the second embodiment has the second determination unit (48b) omitted in the stop control unit (48) of the humidity control apparatus according to the first embodiment. It has a configuration. In the second embodiment, the stop control unit (48) includes a first determination unit (48a) and a command unit (48c).

-Switching from normal dehumidification operation to compressor dehumidification operation-
Switching between the normal dehumidifying operation and the compressor dehumidifying operation in the dehumidifying operation will be described with reference to FIG. In addition, since only the conditions at the time of switching from a normal dehumidification operation to a compressor stop dehumidification operation differ from the said Embodiment 1, only the part is demonstrated.

  As in the case of the first embodiment, the first determination unit (48a) compares the detection value (Tr) of the inside air temperature sensor (85) with the target temperature (Trs), and the inside air humidity sensor (86). The detected value (RHr) and the target relative humidity (RHrs) are compared.

  During the dehumidifying operation, in the first determination unit (48a), at least one of the detected value (Tr) of the inside air temperature sensor (85) and the detected value (RHr) of the inside air humidity sensor (86) is the target value (Trs, If it exceeds (RHrs) (in the case of No in step S20), after a predetermined time elapses, the process returns to step S20 and the above determination is performed again. On the other hand, in the first determination unit (48a), when each of the detected values (Tr, RHr) is equal to or less than the target value (Trs, RHrs) (Yes in step S20), the command unit (48c) Send compressor stop signal Soff to 36). Thereby, since the compressor (36) is stopped, the humidity control apparatus (10) performs a compressor stop dehumidification operation (step S40).

  Although switching from the normal humidification operation to the compressor stop humidification operation is omitted in the drawing, each detection value (Tr, RHr) is greater than or equal to the target value (Trs, RHrs) in the first determination unit (48a). In the case of (Yes in step S20).

-Effect of Embodiment 2-
In Embodiment 2, when the indoor relative humidity (RHr) becomes equal to or lower than the target relative humidity (RHrs), the operation of the humidity control device (10) is switched from the normal operation to the compressor stop operation. That is, after the room has been sufficiently conditioned, the operation is switched to the compressor stop operation. As a result, switching from the normal operation to the compressor stop operation in a state where the humidity control in the room is insufficient can be suppressed, so that it takes a long time to adjust the humidity in the room or the humidity control capacity is insufficient. Can be avoided.

<< Embodiment 3 of the Invention >>
The humidity control apparatus (10) according to the third embodiment is different from the humidity control apparatus according to the first embodiment in the content of determination performed by the second determination unit (48b).

  Specifically, in the second determination unit (48b), the humidity control load (L) calculated based on the indoor humidity (AHr), the outdoor humidity (AHo), and the air volume of the air supply fan (27), A predetermined value (W1) set in advance is compared. This predetermined value (W1) is a value determined in advance based on an assumed value of the processing capacity of the humidity control modules (40a, 40b) during the compressor stop operation.

  In the dehumidifying operation, the second determination unit (48b) proceeds to step S40 when the humidity control load (L) is equal to or less than a predetermined value (W1) as shown in FIG. Thereby, it switches from normal dehumidification operation to compressor stop dehumidification operation.

  Even in the humidification operation, the second determination unit (48b) proceeds to step S40 when the humidity control load (L) is equal to or less than the predetermined value (W1). Thereby, it switches from normal humidification operation to compressor stop humidification operation.

-Effect of Embodiment 3-
In the third embodiment, in a state where the indoor relative humidity (RHr) has reached the target relative humidity (RHrs), based on the indoor humidity (AHr), the outdoor humidity (AHo), and the air volume of the air supply fan (27). When the calculated humidity control load (L) is equal to or less than the predetermined value (W1), the humidity control device (10) is switched from the normal operation to the compressor stop operation. If it carries out like this, humidity control load can be processed only by the drive of a circulation pump, and the energy for driving a compressor (36) can be reduced. Accordingly, the room can be fully conditioned while reducing energy consumption.

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

DESCRIPTION OF SYMBOLS 10 Humidity adjustment apparatus 30 Absorbent circuit 31 Circulation pump 36 Compressor 40a Air supply side module (Air supply side humidity control part)
40b Exhaust module (exhaust humidity control unit)
46a Heat transfer member (heat radiation part, evaporation part)
46b Heat transfer member (heat radiation part, evaporation part)
47 Compressor control unit (switching determination unit)

Claims (6)

A humidity control section (40a) on the air supply side for transferring moisture between air supplied to the room and the liquid absorbent;
A humidity control section (40b) on the exhaust side for transferring moisture between the air discharged to the outside and the liquid absorbent;
It has a circulation pump (31) so that one of the two humidity control units (40a, 40b) releases moisture to the air and the other humidity control unit (40a, 40b) absorbs moisture from the air. In addition, the absorbent circuit (30) in which the liquid absorbent circulates between the humidity control sections (40a, 40b) of both,
A refrigerant circuit (35) in which a compressor (36), a heat radiating section (46a, 46b) and an evaporation section (46a, 46b) are connected, and the refrigerant is circulated to perform a refrigeration cycle;
The compressor (36) and the circulation pump (31) are operated, and the liquid absorbent supplied to the humidity control section (40a, 40b) on the moisture release side is heated by the refrigerant of the heat radiating section (46a, 46b). A normal operation of cooling the liquid absorbent supplied to the moisture conditioning section (40a, 40b) by the refrigerant of the evaporation section (46a, 46b), and the circulation pump (36) while stopping the compressor (36) 31. A humidity control apparatus comprising: a switching determination unit (47) that switches between a compressor stop operation that operates 31) according to a latent heat load. In claim 1,
The switching determination unit (47) makes it a necessary condition for switching from the normal operation to the compressor stop operation that the indoor humidity (RHr) reaches the target humidity (RHrs) during the normal operation. Humidity control device characterized by. In claim 2,
The air supply side humidity control section (40a) is configured to transfer moisture between the air supplied from the outside to the room and the liquid absorbent,
When the indoor humidity (RHr) reaches the target humidity (RHrs) and the humidity control load (L) is a predetermined value (W1) or less during the normal operation, the switching determination unit (47) A humidity control apparatus that switches from normal operation to the compressor stop operation. In claim 3,
The switching determination unit (47) is configured so that the humidity (RHr) in the room reaches the target humidity (RHrs) during the normal operation, and the humidity adjustment load (L) 40a, 40b) When the processing capacity (W) is below, the humidity control device is switched from the normal operation to the compressor stop operation. In any one of Claims 1-4,
Circulation pump control for controlling the discharge amount of the circulation pump (31) according to the humidity (AHs) of air supplied to the room through the humidity control section (40a) on the air supply side during the compressor stop operation A humidity control device comprising a portion (32). In any one of Claims 1 to 5,
In the switching determination unit (47), the humidity (AHs) of the air supplied to the room through the humidity control unit (40a) on the air supply side during the compressor stop operation has deviated from the target humidity (AHss). A humidity control device that switches from the compressor stop operation to the normal operation.

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