JP2013064586A - Humidity control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfactorily operate a humidity control device, even though a temperature (outdoor air temperature) of an outdoor air is low.SOLUTION: Switching sections (32, 36a) of the refrigerant side capable of switching the first condition in which the heat of refrigerant is radiated in the first adsorption heat exchanger (33a) and the reheat auxiliary heat exchanger (35) and the heat of the refrigerant is absorbed in the second adsorption heat exchanger (33b) and the second condition in which the heat of the refrigerant is radiated in the second adsorption heat exchanger (33b) and the auxiliary heat exchanger (35) and the heat of the refrigerant is absorbed in the first adsorption heat exchanger (33a) is arranged in the refrigerant circuit (30) of the humidity control device.

Description

    The present invention relates to a humidity control apparatus, and particularly relates to a means for preheating the taken outdoor air.

    2. Description of the Related Art Conventionally, there has been known a humidity control apparatus that includes a refrigerant circuit to which two adsorption heat exchangers are connected, adjusts outdoor air or indoor air, and supplies the air after humidity adjustment to the room. In this type of humidity control apparatus, as shown in Patent Document 1, by switching the refrigerant circulation direction of the refrigerant circuit reversibly, the first adsorption heat exchanger serves as a condenser and the second adsorption heat exchanger serves as an evaporator, respectively. The operation that functions and the operation that the first adsorption heat exchanger functions as an evaporator and the second adsorption heat exchanger functions as a condenser are alternately performed. And in this humidity control apparatus, one of the air which passed each adsorption heat exchanger is supplied indoors, and the other is discharged | emitted outside, and a dehumidification operation or a humidification operation is performed. For example, in the dehumidifying operation, air that has passed through an adsorption heat exchanger that serves as an evaporator is supplied to the room. In a humidifying operation, air that has passed through an adsorption heat exchanger that serves as a condenser is supplied to the room. .

JP 2005-291532 A

      However, in an environment where the temperature of the outdoor air (outside air temperature) is low (for example, 15 ° C. below freezing point), the damper or the like for switching the operation of each of the adsorption heat exchangers freezes or drain water from each of the adsorption heat exchangers. Occurs or the drain water freezes.

    This invention is made in view of such a point, and it is in making it possible to perform a favorable operation of a humidity control apparatus, even when the temperature (outside air temperature) of outdoor air is low temperature.

    The first invention includes a compressor (31,172), a first adsorption heat exchanger (33a, 176) and a second adsorption heat exchanger (33b, 175) carrying an adsorbent, and an auxiliary heat exchanger (35,194). And the expansion mechanism (37,38) (198,195) are connected to the refrigerant circuit (30,170) for performing the refrigeration cycle by circulating the refrigerant, and the outdoor air that has passed through the auxiliary heat exchanger (35,194) is the first The first state in which the humidity is adjusted by the adsorbent of the adsorption heat exchanger (33a, 176) and the outdoor air that has passed through the auxiliary heat exchanger (35,194) are absorbed by the adsorbent of the second adsorption heat exchanger (33b, 175). The first adsorption heat exchanger (33a, 176) connected to the air side switching unit (D1 to D4, D13 to D16) and the refrigerant circuit (30, 170) which can be switched to the second state of humidity control. And a first state in which the refrigerant is radiated by the auxiliary heat exchanger (35, 194) and the refrigerant is absorbed by the second adsorption heat exchanger (33b, 175), and the second adsorption heat exchanger. 33b, 175) and the auxiliary heat exchanger (35, 194) to dissipate the refrigerant and the first adsorption heat exchanger (33a, 176) to switch to a second state in which the refrigerant absorbs heat. 32, 36a) (173, 188).

    In the first invention, outdoor air heated by the auxiliary heat exchanger (35, 194) can be introduced into the adsorption heat exchanger (33a, 175) (33b, 176). Here, the refrigerant flow relating to the refrigerant circuit (30, 170) is switched between the first state and the second state by the refrigerant side switching section (32, 36a) (173, 188). For example, when the refrigerant side switching unit (32, 36a) (173, 188) is in the first state, the compressor (31, 172), the first adsorption heat exchanger (33a, 176), the auxiliary heat exchanger (35, 194), the expansion The mechanism (37, 38) (198, 195) and the second adsorption heat exchanger (33b, 175) flow in this order, and when the refrigerant side switching section (32, 36a) (173, 188) is in the second state, the compressor ( 31,172), second adsorption heat exchanger (33b, 175), auxiliary heat exchanger (35,194), expansion mechanism (37,38) (198,195), first adsorption heat exchanger (33a, 176) In either case, the auxiliary heat exchanger (35,194) is always a heat radiator in either state. Thereby, the outdoor air heated by the auxiliary heat exchanger (35, 194) can always be introduced into the adsorption heat exchanger regardless of the switching operation of the refrigerant side switching section (32, 36a) (173, 188).

    According to a second aspect, in the first aspect, the refrigerant circuit (30, 170) is provided with a bypass passage (36b, 197) that bypasses the auxiliary heat exchanger (35, 194).

    In the second invention, for example, when the temperature of the outdoor air is high and there is no malfunction such as freezing of the drain water of the adsorption heat exchanger (33a, 175) (33b, 176), the outdoor air needs to be heated. Therefore, a bypass passage (36b, 197) was provided to bypass the refrigerant going to the auxiliary heat exchanger (35, 194).

    According to a third invention, in the second invention, the expansion mechanism (37,38) (198,195) includes a first expansion valve (37,198) for depressurizing the refrigerant flowing through the bypass passage (36b, 197), The second expansion valve (38,195) is configured to depressurize the refrigerant that has passed through the auxiliary heat exchanger (35,194).

    In the third aspect of the invention, both the expansion operation of the refrigerant related to the refrigeration cycle and the adjustment operation of the bypass amount of the refrigerant related to the auxiliary heat exchanger (35,194) are performed as the first expansion valve (37,198) and the second expansion valve. It is possible to do with a valve (38,195). Fully close the first expansion valve (37,198) and adjust the second expansion valve (38,195) as appropriate (for example, adjust the superheat degree of the refrigerant sucked into the compressor (31,172) to a predetermined value). As a result, the refrigerant circuit (30,170) heats the outdoor air with the auxiliary heat exchanger (35,194) while performing the refrigeration cycle.

    Further, the refrigerant circuit (30,170) is heated without fully heating the outdoor air by the auxiliary heat exchanger (35,194) by fully closing the second expansion valve (38,195) and adjusting the first expansion valve (37,198) as appropriate. ) Can be subjected to a refrigeration cycle. At this time, if the second expansion valve (38, 195) is fully closed, refrigerant may accumulate in the auxiliary heat exchanger (35, 194). In this case, by slightly opening the second expansion valve (38,195), the refrigerant flows through the auxiliary heat exchanger (35,194) slightly, and the refrigerant flows into the auxiliary heat exchanger (35,194). It is possible to prevent accumulation.

    In a fourth aspect based on the third aspect, the refrigerant-side switching portion (32, 36a) (173, 188) includes first to fourth check valves (CV-1 to CV-4) (189a to 191a). ) Having a check valve bridge circuit (36a, 188) and extending from between the first check valve (CV-1,189a) and the second check valve (CV-2, 190a). A passage (6) is connected to one end of the first adsorption heat exchanger (33a, 176), and between the first check valve (CV-1,189a) and the third check valve (CV-3,191a). A second refrigerant passage (7) extending from the auxiliary heat exchanger (35,194) is connected to one end of the auxiliary heat exchanger (35,194), and the third check valve (CV-3,191a) and the fourth check valve (CV-4,192a) A third refrigerant passage (8) extending from between is connected to one end of the second adsorption heat exchanger (33b, 175), and the fourth check valve (CV-4, 192a) and the second check valve (CV -2,190a) passes through the second expansion valve (38,195) through the fourth refrigerant passage (9) extending from between the auxiliary heat exchanger (35,194). While connected to the other end, the bypass passage (36b, 197) is characterized in that for connecting the second refrigerant passage (7) Fourth refrigerant passage (9).

    In the fourth invention, the refrigerant flows through the bypass passage (36b, 197) by bypassing the auxiliary heat exchanger (35, 194) and the second expansion valve (38, 195). In this case, not all the refrigerant flows toward the bypass passage (36b, 197), and a part of the refrigerant flows and accumulates toward the auxiliary heat exchanger (35, 194) and the second expansion valve (38, 195). is there.

    If the bypass passage (36b, 197) connects the first refrigerant passage (6) and the third refrigerant passage (8), the auxiliary heat exchanger (35, 194) and the second expansion valve are connected. (38,195) and the check valve bridge circuit (36a, 188) are bypassed, and the refrigerant also accumulates in the check valve bridge circuit (36a, 188). If the bypass passage (36b, 197) is provided as in the fourth aspect of the invention, the refrigerant does not accumulate in the check valve bridge circuit (36a, 188), and the refrigerant is insufficient in the humidity control operation due to the accumulation of refrigerant. Is less likely to occur.

    According to the present invention, even when the refrigerant flow related to the refrigerant circuit (30, 170) is switched between the first state and the second state by the refrigerant side switching unit (32, 36a) (173, 188), The auxiliary heat exchanger (35,194) becomes a radiator and can be introduced into the adsorption heat exchanger (33a, 175) (33b, 176) after the outdoor air at low temperature is heated by the auxiliary heat exchanger (35,194) . This eliminates problems such as freezing of the drain water in the adsorption heat exchangers (33a, 175) (33b, 176), and allows the humidity control device to operate well even when the outdoor air is at a low temperature. it can.

    Further, according to the second aspect of the invention, by providing the refrigerant circuit (30,170) with the bypass passage (36b, 197), the refrigerant directed to the auxiliary heat exchanger (35,194) through the bypass passage (36b, 197). Can be bypassed at least in part. Thereby, for example, when the temperature of outdoor air is high, it is possible to prevent the outdoor air from being heated unnecessarily.

    According to the third aspect of the invention, the first expansion valve and the second expansion valve (37,198) (38,195) are related to the refrigerant expansion operation related to the refrigeration cycle and the auxiliary heat exchanger (35,194). It also serves as both the refrigerant bypass adjustment operation. Accordingly, there is no need to provide two valves for the refrigerant expansion operation and the bypass amount adjustment operation, the number of components of the humidity control device is reduced, and the cost of the humidity control device can be reduced. .

    Further, according to the fourth aspect of the invention, the check valve is compared with the case where the bypass passage (36b, 197) connects the first refrigerant passage (6) and the third refrigerant passage (8). The amount of refrigerant that accumulates can be reduced by an amount that does not bypass the bridge circuit (36a, 188). As a result, during the bypass operation in which the refrigerant passes through the bypass passages (36b, 197), the refrigerant shortage due to the accumulation of the refrigerant is less likely to occur, and the bypass operation can be performed stably.

It is a schematic block diagram of the humidity control apparatus which concerns on Embodiment 1. FIG. 2 is a schematic perspective view showing an internal structure of a casing according to Embodiment 1. FIG. It is a schematic block diagram of the humidity control apparatus which concerns on Embodiment 1, FIG. 3 (A) shows a top view, FIG.3 (B) shows the WW arrow view of FIG. 3 (A), FIG. 3C shows the XX arrow view of FIG. 3A, FIG. 3D shows the YY arrow view of FIG. 3A, and FIG. 3E shows FIG. FIG. It is a perspective view explaining the flow of the air suck | inhaled from the outdoor suction inlet among the air flows in the 1st operation | movement of the dehumidification ventilation driving | operation of the humidity control apparatus which concerns on Embodiment 1, and a humidification ventilation driving | operation. It is a perspective view explaining the flow of the air suck | inhaled from the indoor suction opening among the air flows in the 1st operation | movement of the dehumidification ventilation driving | operation of the humidity control apparatus which concerns on Embodiment 1, and a humidification ventilation driving | operation. It is a perspective view explaining the flow of the air suck | inhaled from the outdoor suction inlet among the air flows in the 2nd operation | movement of the dehumidification ventilation driving | operation of the humidity control apparatus which concerns on Embodiment 1, and a humidification ventilation driving | operation. It is a perspective view explaining the flow of the air suck | inhaled from the indoor suction inlet among the air flows in the 2nd operation | movement of the dehumidification ventilation driving | operation of the humidity control apparatus which concerns on Embodiment 1, and a humidification ventilation driving | operation. It is a perspective view which shows the structure of the adsorption heat exchanger in Embodiment 1. FIG. It is a piping system diagram showing the refrigerant circuit of the humidity control apparatus according to the first embodiment. It is a schematic diagram explaining the flow of the air inhaled from the outdoor inlet of the humidity control apparatus which concerns on Embodiment 1. FIG. It is a schematic diagram explaining the flow of the air sucked from the indoor suction port of the humidity control apparatus according to the first embodiment. It is a schematic perspective view which shows the internal structure of the casing of the humidity control apparatus which concerns on a prior art example. FIG. 13 is a perspective view illustrating a casing structure of the humidity control apparatus according to the second embodiment. FIG. 14 is a perspective view illustrating a frame structure of the humidity control apparatus according to the second embodiment. FIG. 15 is a configuration diagram schematically showing a humidity control apparatus according to the second embodiment. FIG. 15A is a top view of the humidity control apparatus, and FIG. 15B is an internal structure of the humidity control apparatus. 15C shows the internal structure of the humidity control apparatus from the left side, and FIG. 15D shows the internal structure of the humidity control apparatus from the right side. FIG. 16 is a configuration diagram schematically illustrating the humidity control apparatus according to the second embodiment. FIG. 16A illustrates the internal structure of the humidity control apparatus as viewed from the YY cross section of FIG. FIG. 16 (B) shows the internal structure of the humidity control apparatus as viewed from the ZZ cross section of FIG. 16 (A). FIG. 17 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the internal structure of the lower space. FIG. 18 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the peripheral structure of the reheat heat exchanger. FIG. 19 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the peripheral structure of the lower damper. FIG. 20 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the peripheral structure of the upper damper. FIG. 21 is a perspective view of the adsorption heat exchanger according to the second embodiment in which a surrounding humidity control chamber is added using a virtual line. FIG. 22 is a perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the internal structure of the upper space. FIG. 23 is a schematic configuration diagram of a refrigerant circuit of the humidity control apparatus according to the second embodiment. FIG. 24 is a diagram corresponding to FIG. 15 illustrating the air flow of the first operation during the dehumidifying operation or the first operation during the humidifying operation of the humidity control apparatus according to the second embodiment. FIG. 25 is a diagram corresponding to FIG. 16 illustrating the air flow of the first operation during the dehumidifying operation or the first operation during the humidifying operation of the humidity control apparatus according to the second embodiment. FIG. 26 is a diagram corresponding to FIG. 15 illustrating the air flow of the second operation during the dehumidifying operation or the second operation during the humidifying operation of the humidity control apparatus according to the second embodiment. FIG. 27 is a diagram corresponding to FIG. 16 illustrating the air flow of the second operation during the dehumidifying operation or the second operation during the humidifying operation of the humidity control apparatus according to the second embodiment.

    Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 of the Invention
As shown in FIGS. 1 to 3, the humidity control apparatus (110) according to the first embodiment of the present invention is a floor-type humidity control apparatus that is installed on the indoor floor surface and controls indoor humidity. The humidity control device (110) is configured to be installable in a storage space of a closet in which clothes and the like are stored, for example.

    The humidity control apparatus (110) includes a casing (111) formed in a vertically long rectangular parallelepiped shape. In addition, the up-down direction and the left-right direction in the following description shall mean each direction seen from the front side of the casing (111) of FIG.

    The casing (111) includes a front cover (112) that covers the front surface of the casing (111) and is detachably attached to the casing (111), and a rear plate (115) is attached to the rear surface side.

    The casing (111) is attached with a top plate (116) at the upper end and a bottom plate (117) at the lower end. The casing (111) is attached with a right side plate (113) at the right end and a left side plate (114) at the left end.

    Four duct connection ports (150 to 153) are formed in the top plate (116). These duct connection ports (150 to 153) are formed adjacent to each other so as to correspond to the four corners of the top plate (116). Specifically, the four duct connection ports (150 to 153) are formed on the outdoor suction port (150) formed on the front left side of the top plate (116) and on the rear right side of the top plate (116). Consists of an indoor air inlet (151), an indoor inlet (152) formed on the front right side of the top plate (116), and an outdoor exhaust port (153) formed on the rear left side of the top plate (116) Has been. In other words, the outdoor suction port (150), the indoor air supply port (151), the indoor suction port (152), and the outdoor exhaust port (153) are formed integrally on the upper surface of the casing (111).

    Each duct connection port (150 to 153) is provided with a duct (not shown) through which air can flow. Each duct extends upward toward the ceiling side of the room, and is disposed up to a predetermined space along the back of the ceiling. Through these ducts, the outdoor suction port (150) and the outdoor exhaust port (153) are connected to the outdoor space, and the indoor suction port and the indoor air supply port (151) are connected to the indoor space. The outdoor suction port (150) is connected to the duct via the filter unit (154). The filter unit (154) is provided at the upper part of the outdoor suction port (150) and accommodates the outdoor air filter (156). That is, the outdoor air flowing through the duct flows through the inside of the filter unit (154), passes through the outdoor air filter (156), and is taken into the casing (111) from the outdoor suction port (150). The outdoor suction port (150) forms an opening for introducing outdoor air (OA) into the casing (111), and the indoor suction port (152) transfers the indoor air (RA) to the casing (111). An opening is formed for introduction into the interior. The outdoor exhaust port (153) constitutes an opening for discharging the air in the casing (111) to the outside as exhaust air (EA), and the indoor air supply port (151) is formed in the casing (111). An opening for supplying air into the room as supply air (SA) is formed.

    The front cover (112) is configured to be attachable / detachable to / from the casing (111) so as to cover an open part on the front side of the casing (111). The front cover (112) is provided with an operation switch (not shown) for switching the operation of the humidity control device (110) by a user of the humidity control device (110). Further, an opening for allowing the filter (155, 156) to be taken out / attached and an opening / closing lid capable of opening and closing the opening are provided on the upper portion of the front cover (112). The opening / closing lid is configured to be detachable from the front cover (112).

    The casing (111) has a rectangular parallelepiped space formed therein. Inside the casing (111), an upper partition plate (120) and a lower partition plate (121) are provided vertically. The upper partition plate (120) and the lower partition plate (121) are formed in a rectangular plate material, and are supported in a horizontal posture inside the casing (111).

    A flat rectangular parallelepiped machine room (160) is defined between the lower partition plate (121) and the bottom plate (117). The machine room (160) accommodates a compressor (172), a four-way switching valve (173), a control board (161) and the like connected to a refrigerant circuit (170) described later. The compressor (172) is configured as a vertical type compressor, and is installed on the bottom plate (117) of the casing (111). The compressor (172) has a scroll type or rotary type compression mechanism, for example.

    Further, a drain pan (1102) for storing moisture condensed by the adsorption heat exchangers (175, 176) is provided on the upper surface of the lower partition plate (121). The drain pan (1102) is formed across a first humidity control chamber (127) and a second humidity control chamber (128) which will be described later.

    A flat rectangular parallelepiped space is defined between the upper partition plate (120) and the top plate (116). In this space, a vertical partition plate (118) and a horizontal partition plate (119) are provided. The vertical partition plate (118) is formed in a plate shape whose long side extends in the front-rear direction, and the horizontal partition plate (119) is supported by the casing (111) in a vertical posture in which the long side extends in the left-right direction. The vertical partition plate (118) and the horizontal partition plate (119) partition the space between the upper partition plate (120) and the top plate (116) into four rooms (145, 146, 147, 148). These four rooms are composed of first to fourth rooms (145, 146, 147, 148). The first chamber (145) is formed on the front left side of the casing (111), and the second chamber (146) is formed on the front right side of the casing (111). The third chamber (147) is formed near the rear right side of the casing (111), and the fourth chamber (148) is formed near the rear left side of the casing (111).

    As shown in FIGS. 3 to 7, the vertical partition plate (118) has a first opening (141) slightly rearward of the portion that partitions the first chamber (145) and the second chamber (146). In addition, a fourth opening (144) is formed slightly toward the front of the portion separating the third chamber (147) and the fourth chamber (148). The first opening (141) connects the first chamber (145) and the second chamber (146), and the fourth opening (144) is the third chamber (147) and the fourth chamber (148). It is what connects.

    As shown in FIGS. 3 to 7, the upper partition plate (120) is formed with first, second, seventh and eighth flow ports (131, 132, 137, 138) and second and third openings (142, 143). ing. The first flow port (131) is formed at a portion facing the first chamber (145) in the upper partition plate (120). The second opening (142) is formed on the front side of the portion facing the second chamber (146) in the upper partition plate (120). The second flow port (132) is formed on the rear side of the portion of the upper partition plate (120) that faces the second chamber (146). The seventh flow port (137) is formed on the front side of the portion facing the third chamber (147) in the upper partition plate (120). The third opening (143) is formed on the rear side of the portion facing the third chamber (147) in the upper partition plate (120). The eighth circulation port (138) is formed at a portion facing the fourth chamber (148) in the upper partition plate (120).

    In the first chamber (145), an auxiliary heat exchanger (194) attached by a mounting plate (129) is disposed between the top plate (116) and the upper partition plate (120). The mounting plate (129) is a frame formed in a substantially rectangular rectangular shape straddling the front and rear. The mounting plate (129) is disposed in an oblique posture in the first chamber (145), and an auxiliary heat exchanger (194) is fitted below the mounting plate (129). Further, a pipe communication part (130) for guiding the reheat refrigerant pipe (7) to the downstream side of the air of the auxiliary heat exchanger (194) is formed on the side surface part of the mounting plate (129). The pipe communication part (130) is an opening extending along one side surface part of the mounting plate (129), and constitutes an opening part according to the present invention. The reheat refrigerant pipe (7) is connected to the heat transfer pipe of the auxiliary heat exchanger (194) via the pipe communication portion (130).

    The auxiliary heat exchanger (194) preheats outdoor air sucked from the outdoor suction port (150). The auxiliary heat exchanger (194) is constituted by a cross fin type fin-and-tube heat exchanger. The auxiliary heat exchanger (194) includes a copper heat transfer tube and aluminum fins. The auxiliary heat exchanger (194) is fitted in a mounting plate (129) formed in a rectangular frame. That is, the interior of the first chamber (145) is partitioned into an upstream side and a downstream side of air by the auxiliary heat exchanger (194) and the mounting plate (129). The auxiliary heat exchanger (194) of the first embodiment is configured by a cross fin type fin-and-tube heat exchanger, but is not limited to this, for example, a plate type heat exchange. Or a shell and tube heat exchanger.

    As shown in FIG. 2, in the first chamber (145), a reheat refrigerant pipe (7), a second motor operated valve (195) are provided on the downstream side of the mounting plate (129) and the auxiliary heat exchanger (194). ), A bypass pipe (197), and a first motor-operated valve (198).

    In the second chamber (146), an outside air passage cover (162) is disposed on the lower side between the top plate (116) and the upper partition plate (120). The outside air passage cover (162) forms a space communicating with both the first opening (141) and the second circulation port (132). The outside air passage cover (162) is provided in the second chamber (146) so as to partition the first opening (141) and the second circulation port (132) from the second opening (142).

    An internal air filter (155) is provided at the second flow port (132) in the second chamber (146). The room air filter (155) is disposed below the indoor suction port (152). The inside air filter (155) is formed in a plate shape or a sheet shape, and is attached so as to cover the second circulation port (132). The inside air filter (155) is configured to be movable forward and backward in the second chamber (146).

    In the third chamber (147), an exhaust passage cover (163) is disposed on the lower side between the top plate (116) and the upper partition plate (120). The exhaust passage cover (163) forms a space communicating with both the fourth opening (144) and the seventh circulation port (137). The exhaust passage cover (163) is provided in the third chamber (147) so as to partition the fourth opening (144) and the seventh circulation port (137) from the third opening (143).

    The third chamber (147) is provided with an air supply fan (157) above the exhaust passage cover (163), and the fourth chamber (148) is provided with an exhaust fan (158). Each of these fans (157, 158) is a centrifugal multi-blade fan (so-called sirocco fan). The air supply fan (157) blows air attracted from the third opening (143) toward the indoor air supply port (151). The exhaust fan (158) exhausts air attracted from the seventh circulation port (137) or the eighth circulation port (138) toward the outdoor exhaust port (153).

    A rectangular parallelepiped space is defined between the lower partition plate (121) and the upper partition plate (120). In this space, a front partition plate (123) and a rear partition plate (124) are provided. The front partition plate (123) and the rear partition plate (124) are formed from the lower partition plate (121) to the upper partition plate (120) and parallel to the left and right side plates (113, 114) of the casing (111). It is supported on the casing (111) in a vertical posture. The front partition plate (123) and the rear partition plate (124) partition the space between the lower partition plate (121) and the upper partition plate (120) into three spaces.

    The front partition plate (123) is formed with third and fourth circulation ports (133, 134). The third circulation port (133) is formed on the left side of the lower part of the front partition plate (123) and corresponds to the second adsorption heat exchanger (175). The fourth circulation port (134) is formed on the right side of the lower part of the front partition plate (123), and corresponds to the first adsorption heat exchanger (176).

    The rear partition plate (124) is formed with fifth and sixth flow ports (135, 136). The fifth flow port (135) is formed on the left side of the lower portion of the front partition plate (123). The fifth circulation port (135) corresponds to the second adsorption heat exchanger (175). The sixth circulation port (136) is formed on the lower right side of the lower part of the front partition plate (123). The sixth circulation port (136) corresponds to the first adsorption heat exchanger (176).

    Of the three spaces, the space closer to the front constitutes the first intermediate passage (125). The first intermediate passage (125) is formed between the front partition plate (123) and the front cover (112) of the casing (111). Of the three spaces, the space closer to the rear side constitutes the second intermediate passage (126). The second intermediate passage (126) is formed between the rear partition plate (124) and the back plate (115) of the casing (111).

    The first intermediate passage (125) has an upper end communicating with the second opening (142), and a lower end closed by the lower partition plate (121). The second intermediate passage (126) has an upper end communicating with the third opening (143) and a lower end closed by the lower partition plate (121).

    Of the three spaces, the central space is divided into left and right by a central partition plate (122). Of the left and right spaces, the left space constitutes the first humidity control chamber (127), and the right space constitutes the second humidity control chamber (128). That is, the first humidity control chamber (127) and the second humidity control chamber (128) are formed side by side so as to be adjacent to each other across the central partition plate (122).

    A second adsorption heat exchanger (175) is accommodated in the first humidity control chamber (127), and a first adsorption heat exchanger (176) is accommodated in the second humidity adjustment chamber (128). Each adsorption heat exchanger (175, 176) is arranged in a horizontal posture in each humidity control chamber (127, 128). The second adsorption heat exchanger (175) and the first adsorption heat exchanger (176) are connected in series to a refrigerant circuit (170) described later. That is, the adsorption heat exchangers (175, 176) are arranged on the downstream side of the air of the auxiliary heat exchanger (194).

    Each of the adsorption heat exchangers (175, 176) is constituted by a cross fin type fin-and-tube heat exchanger. As shown in FIG. 8, these adsorption heat exchangers (175, 176) include a copper heat transfer tube (177) and aluminum fins (178). The plurality of fins (178) provided in the adsorption heat exchanger (175, 176) are each formed in a rectangular shape and are arranged at regular intervals. Further, the heat transfer tube (177) has a shape meandering in the arrangement direction of the fins (178). That is, in this heat transfer tube (177), straight tube portions that pass through the fins (178) and U-shaped tube portions that connect adjacent straight tube portions are alternately configured.

    In each of the adsorption heat exchangers (175, 176), an adsorbent is supported on the surface of each fin (178), and the air passing between the fins (178) contacts the adsorbent supported on the fin (178). To do. As this adsorbent, those having a predetermined adsorption / desorption performance with respect to moisture in the air, such as zeolite, silica gel, activated carbon, and an organic polymer material having a hydrophilic functional group, are used.

    The adsorption heat exchanger (175, 176) of the first embodiment is configured by a cross fin type fin-and-tube heat exchanger, but is not limited to this, for example, a plate type heat exchange. Or a shell and tube heat exchanger.

    As described above, the upper partition plate (120) is formed with the first, second, seventh and eighth flow ports (131, 132, 137, 138) and the first and second openings (141, 142). The first circulation port (131) allows the first chamber (145) and the first humidity control chamber (127) to communicate with each other, and the second circulation port (132) passes through the first opening (141) to perform the second adjustment. The wet chamber (128) and the first chamber (145) are communicated with each other, and the seventh flow port (137) is connected to the second humidity chamber (128) and the fourth chamber (148) through the fourth opening (144). And the eighth circulation port (138) allows the first humidity control chamber (127) and the fourth chamber (148) to communicate with each other. As described above, the first opening (141) connects the first chamber (145) and the second chamber (146), and the fourth opening (144) includes the third chamber (147) and the fourth chamber. (148).

    As shown in FIGS. 3 to 7, the front partition plate (123) is formed with third and fourth flow ports (133, 134). The third circulation port (133) communicates the first intermediate passage (1125) and the first humidity control chamber (1127), and the fourth circulation port (134) communicates with the first intermediate passage (125) and the second adjustment passage. It communicates with the wet chamber (128).

    The rear partition plate (124) is formed with fifth and sixth flow ports (135, 136). The fifth flow port (135) communicates the second intermediate passage (126) and the first humidity control chamber (127), and the sixth flow port (136) communicates with the second intermediate passage (126) and the second control passage. It communicates with the wet chamber (128).

    The upper partition plate (120), the front partition plate (123), and the rear partition plate (124) are provided with dampers that allow the corresponding flow ports (131 to 138) to be opened and closed. Specifically, the upper partition plate (120) includes a first damper (D11) that interrupts the first circulation port (131), a second damper (D12) that intermittently connects the second circulation port (132), A seventh damper (D17) for interrupting the seventh circulation port (137) and an eighth damper (D18) for interrupting the eighth circulation port (138) are provided. Further, the front partition plate (123) is provided with a third damper (D13) for connecting / disconnecting the third flow port (133) and a fourth damper (D14) for connecting / disconnecting the fourth flow port (134). . Further, the rear partition plate (124) is provided with a fifth damper (D15) for connecting / disconnecting the fifth circulation port (135) and a sixth damper (D16) for connecting / disconnecting the sixth circulation port (136). ing.

    Each damper (D11 to D18) has, for example, two shutters and a motor that rotates each shutter about a horizontal axis. That is, in each of the dampers (D11 to D18), the two shutters are displaced by the rotation of the motor, and the corresponding circulation ports (131 to 138) are switched between the open state and the closed state.

-Configuration of refrigerant circuit-
The refrigerant circuit (170) mounted on the humidity control device (110) will be described with reference to FIG. The refrigerant circuit (170) includes a main circuit (171) and a bypass circuit (196).

    The main circuit (171) includes a second adsorption heat exchanger (175), a first adsorption heat exchanger (176), a compressor (172), a four-way switching valve (173), a bridge circuit (188), an auxiliary heat It is a closed circuit in which the exchanger (194) and the second motor operated valve (195) are connected to each other by the refrigerant pipe (185). The main circuit (171) performs a vapor compression refrigeration cycle by circulating the refrigerant through the refrigerant pipe (185). Of the refrigerant pipe (185), the refrigerant pipe (185) communicating with the auxiliary heat exchanger (194) is configured as a reheat refrigerant pipe (7). The reheat refrigerant pipe (7) is arranged in the first chamber (145) on the downstream side of the air in the auxiliary heat exchanger (194). For this reason, even if the outdoor air is at a low temperature, air preheated by the auxiliary heat exchanger (194) flows around the reheat refrigerant pipe (7).

    The compressor (172) has its discharge side connected to the first port of the four-way switching valve (173) and its suction side connected to the second port of the four-way switching valve (173) via the accumulator (179). Yes. A high-pressure line (186) that connects the discharge side of the compressor (172) and the first port includes a discharge temperature sensor (180) that detects the temperature of the refrigerant on the discharge side of the compressor (172), and a compressor (172 ) Discharge pressure sensor (181) that detects the pressure of the refrigerant on the discharge side, and a high pressure that automatically stops the operation of the compressor (172) when the discharge pressure of the compressor (172) becomes higher than a predetermined pressure A cutoff switch (182) is provided. In addition, a low pressure line (187) connecting the suction side of the compressor (172) and the second port has a thermistor (1101) and a suction temperature sensor for detecting the temperature of the refrigerant on the suction side of the compressor (172) ( 183) and a suction pressure sensor (184) for detecting the pressure of the refrigerant on the suction side of the compressor (172).

    The four-way switching valve (173) includes a first state in which the first port communicates with the fourth port and the second port communicates with the third port, and the first port and the third port. It is possible to switch to the second state in which the port communicates and the second port communicates with the fourth port.

    In addition, the second adsorption heat exchanger (175), the filter (1100), the bridge circuit (188), the auxiliary heat exchanger (194), the second electric valve (195), the strainer (199), The first adsorption heat exchanger (176) is connected in order from the third port to the fourth port of the four-way switching valve (173).

    In the bridge circuit (188), the refrigerant circulating in either reversible direction is the same as that of the second motor operated valve (195) depending on the switching state (first state or second state) of the four-way switching valve (173). The flow of the refrigerant is controlled to pass in the direction.

    The bridge circuit (188) is disposed in a liquid line between the second adsorption heat exchanger (175) and the first adsorption heat exchanger (176). The bridge circuit (188) includes first to fourth pipes (189, 190, 191, 192) connected in a bridge shape, and first to fourth check valves (189a, 190a) provided in the pipes (189, 190, 191, 192), respectively. , 191a, 192a) and a one-way passage (9) connecting the outflow side of the first pipe (189) and the third pipe (191) and the inflow side of the second pipe (190) and the fourth pipe (192) It consists of This one-way passage (9) is a refrigerant passage through which the refrigerant condensed in both adsorption heat exchangers (175, 176) flows in one direction out of the refrigerant flowing through the main circuit (171), and is connected to the refrigerant pipe (185). It is a part.

    The inflow side of the first pipe (189) and the outflow side of the second pipe (190) are connected to the first adsorption heat exchanger (176) via the first refrigerant passage (6). On the other hand, the inflow side of the third pipe (191) and the outflow side of the fourth pipe (192) are connected to the second adsorption heat exchanger (175) via the third refrigerant passage (8). The inflow side of the second pipe (190) and the fourth pipe (192) is connected to the outflow side of the auxiliary heat exchanger (194). On the other hand, the outflow sides of the first pipe (189) and the third pipe (191) are connected to the inflow side of the auxiliary heat exchanger (194).

    The auxiliary heat exchanger (194) is for condensing (dissipating heat) the gas-liquid two-phase refrigerant flowing through the refrigerant pipe (185) to supercool it. The refrigerant flowing out from the bridge circuit (188) flows into the auxiliary heat exchanger (194), while outdoor air (OA) taken in from the outdoor suction port (150) passes through the auxiliary heat exchanger (194). That is, the auxiliary heat exchanger (194) is configured to heat the outdoor air passing by the gas-liquid two-phase refrigerant that has flowed out of the adsorption heat exchangers (175, 176).

    The second motor-operated valve (195) constitutes an expansion valve that expands the refrigerant that has flowed out of the auxiliary heat exchanger (194). The second motor operated valve (195) is provided on the downstream side of the refrigerant in the auxiliary heat exchanger (194), and expands and depressurizes the refrigerant that has flowed out of the auxiliary heat exchanger (194).

    The bypass circuit (196) bypasses the auxiliary heat exchanger (194) and the second motor-operated valve (195) through the flow of the refrigerant that has flowed out of the adsorption heat exchangers (175, 176). The bypass circuit (196) is a circuit in which the first motor operated valve (198) is connected by a bypass pipe (197).

    The bypass pipe (197) allows the refrigerant flowing through the one-way passage (9) of the bridge circuit (188) to flow. The bypass pipe (197) is formed in a tubular shape in which the refrigerant circulates, and one end of the bypass pipe (197) is connected to the outflow side of the first pipe (189) and the third pipe (191) of the bridge circuit (188) and the auxiliary heat exchanger ( 194), and the other end is connected between the second pipe (190) and the fourth pipe (192) of the bridge circuit (188) and the second motor-operated valve (195). ing. The bypass pipe (197) is connected to the first motor operated valve (198) in the middle thereof.

    The first motor-operated valve (198) constitutes an expansion valve that expands the refrigerant circulating in the bypass circuit (196). The first motor operated valve (198) is provided in the middle of the bypass pipe (197). And the refrigerant | coolant which flows through a bypass pipe (197) flows in into a 2nd piping (190) and a 4th piping (192), after expanding with a 1st motor operated valve (198).

-Driving action-
The humidity control apparatus (110) of the first embodiment selectively performs “dehumidification ventilation operation” and “humidification ventilation operation”. In “dehumidification ventilation operation” and “humidification ventilation operation”, the humidity of the outdoor air (OA) taken in is adjusted and then supplied to the room as supply air (SA). At the same time, the indoor air (RA) taken in is exhausted (EA ) To discharge outside. Hereinafter, these operations will be described in detail.

<Dehumidification ventilation operation>
In the humidity control apparatus (110) during the dehumidifying ventilation operation, a first operation and a second operation described later are alternately repeated at a predetermined time interval (for example, every 3 minutes).

    When the air supply fan (157) is operated in the humidity control apparatus (110) during the dehumidification / ventilation operation, outdoor air is taken in the casing (111) as the first air from the outdoor suction port (150). Further, when the exhaust fan (158) is operated, room air is taken as second air from the indoor suction port (152) into the casing (111). In normal operation, the second motor-operated valve (195) is set to the closed state, and the first motor-operated valve (198) is used as a control valve.

    First, the first operation of the dehumidifying ventilation operation will be described. As shown in FIGS. 4 and 5, during the first operation, the state of each damper (D11 to D18) is switched, so that the first circulation port (131), the fourth circulation port (134), the first The 5th flow port (135) and the 7th flow port (137) are opened, and the second flow port (132), the third flow port (133), the sixth flow port (136), and the eighth flow port ( 138) is closed.

    In the refrigerant circuit (170) during the first operation, the four-way switching valve (173) is set to the first state as shown by the solid line in FIG. In the refrigerant circuit (170) in this state, the refrigerant circulates to perform a refrigeration cycle. At this time, in the refrigerant circuit (170), the refrigerant discharged from the compressor (172) passes through the first adsorption heat exchanger (176), the bridge circuit (188), the bypass pipe (197), and the first motor operated valve (198). The second adsorption heat exchanger (175) is passed in this order, the first adsorption heat exchanger (176) becomes a condenser, and the second adsorption heat exchanger (175) becomes an evaporator.

    As shown in FIGS. 4, 5, 10, and 11, the air that has passed through the duct and passed through the outdoor air filter (156) flows into the first chamber (145) from the outdoor suction port (150). The outside air filter (156) captures dust contained in the first air. The first air that has flowed into the first chamber (145) flows through the first circulation port (131) and flows into the first humidity control chamber (127). The first air flows through the first humidity control chamber (127) and passes through the second adsorption heat exchanger (175). In the second adsorption heat exchanger (175), moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air dehumidified by the second adsorption heat exchanger (175) flows out from the fifth circulation port (135) to the second intermediate passage (126). The first air flows through the second intermediate passage (126) upward and to the right, flows into the third chamber (147) from the third opening (143), flows through the third chamber (147), and is supplied to the indoor air supply port. It flows out to the duct from (151) and is supplied to the room.

    On the other hand, the second air flowing into the second chamber (146) from the indoor suction port (152) passes through the indoor air filter (155). In the inside air filter (155), dust contained in the second air is captured. The second air that has passed through the inside air filter (155) flows from the second opening (142) to the first intermediate passage (125), and flows into the second humidity control chamber (128) from the fourth circulation port (134). The second air flows through the second humidity control chamber (128) and passes through the first adsorption heat exchanger (176). In the first adsorption heat exchanger (176), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air used for regeneration of the adsorbent of the first adsorption heat exchanger (176) flows into the third chamber (147) from the seventh flow port (137) and passes through the fourth opening (144). And flows into the fourth chamber (148). The second air flows through the fourth chamber (148), flows out from the outdoor exhaust port (153) to the duct, and is discharged to the outside.

    Next, the second operation of the dehumidifying ventilation operation will be described. As shown in FIGS. 6 and 7, during the second operation, the state of each damper (D11 to D18) is switched, so that the second circulation port (132), the third circulation port (133), The 6th flow port (136) and the 8th flow port (138) are opened, and the first flow port (131), the fourth flow port (134), the fifth flow port (135), and the seventh flow port ( 137) is closed.

    In the refrigerant circuit (170) in the second operation, the four-way switching valve (173) is set to the second state as indicated by a broken line in FIG. In the refrigerant circuit (170) in this state, the refrigerant circulates to perform a refrigeration cycle. At this time, in the refrigerant circuit (170), the refrigerant discharged from the compressor (172) flows into the second adsorption heat exchanger (175), the bridge circuit (188), the bypass pipe (197), and the first motor operated valve (198). Then, the first adsorption heat exchanger (176) passes in this order, the second adsorption heat exchanger (175) serves as a condenser, and the first adsorption heat exchanger (176) serves as an evaporator.

    As shown in FIGS. 6, 7, 10, and 11, the air that has passed through the duct and passed through the outdoor air filter (156) flows into the first chamber (145) from the outdoor suction port (150). The outside air filter (156) captures dust contained in the first air. The first air flowing into the first chamber (145) passes through the first opening (141), flows into the second chamber (146), flows through the second circulation port (132), and enters the second humidity control chamber ( 128). The first air flows through the second humidity control chamber (128) and passes through the first adsorption heat exchanger (176). In the first adsorption heat exchanger (176), moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air dehumidified by the first adsorption heat exchanger (176) flows out from the sixth circulation port (136) to the second intermediate passage (126). The first air flows upward through the second intermediate passage (126), flows into the third chamber (147), flows through the third chamber (147), and flows out from the indoor air supply port (151) to the duct. Supplied indoors.

    On the other hand, the second air flowing into the second chamber (146) from the indoor suction port (152) passes through the indoor air filter (155). In the inside air filter (155), dust contained in the second air is captured. The second air that has passed through the inside air filter (155) flows from the second opening (142) to the first intermediate passage (125), and flows into the first humidity control chamber (127) from the third circulation port (133). The second air flows through the first humidity control chamber (127) and passes through the second adsorption heat exchanger (175). In the second adsorption heat exchanger (175), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air used for regeneration of the adsorbent in the second adsorption heat exchanger (175) flows into the fourth chamber (148) from the eighth flow port (138). The second air flows through the fourth chamber (148), flows out from the outdoor exhaust port (153) to the duct, and is discharged to the outside.

<Humidified ventilation operation>
In the humidity control apparatus (110) during the humidification ventilation operation, a first operation and a second operation described later are alternately repeated at a predetermined time interval (for example, every 3 minutes).

    When the air supply fan (157) is operated in the humidity control apparatus (110) during the humidification ventilation operation, the outdoor air is taken as the first air from the outdoor suction port (150) into the casing (111). Further, when the exhaust fan (158) is operated, room air is taken as second air from the indoor suction port (152) into the casing (111). In normal operation, the second motor-operated valve (195) is used as a control valve, and the first motor-operated valve (198) is set in a closed state.

    First, the 1st operation | movement of humidification ventilation operation is demonstrated. As shown in FIGS. 4 and 5, during the first operation, the state of each damper (D11 to D18) is switched, so that the first circulation port (131), the fourth circulation port (134), the first The 5th flow port (135) and the 7th flow port (137) are opened, and the second flow port (132), the third flow port (133), the sixth flow port (136), and the eighth flow port ( 138) is closed. In the refrigerant circuit (170) during the first operation, the second adsorption heat exchanger (175) serves as a condenser, and the first adsorption heat exchanger (176) serves as an evaporator.

    As shown in FIGS. 4, 5, 10, and 11, the air that has passed through the duct and passed through the outside air filter (156) flows into the first chamber (145) from the outdoor suction port (150). The first air that has flowed into the first chamber (145) flows through the first circulation port (131) and flows into the first humidity control chamber (127). The first air flows through the first humidity control chamber (127) and passes through the second adsorption heat exchanger (175). In the second adsorption heat exchanger (175), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the first air. The first air humidified by the second adsorption heat exchanger (175) flows out from the fifth circulation port (135) to the second intermediate passage (126). The first air flows through the second intermediate passage (126) upward and to the right, flows into the third chamber (147) from the third opening (143), flows through the third chamber (147), and is supplied to the indoor air supply port. It flows out to the duct from (151) and is supplied to the room.

    On the other hand, the second air flowing into the second chamber (146) from the indoor suction port (152) passes through the inside air filter (155) and flows from the second opening (142) to the first intermediate passage (125). Then, it flows into the second humidity control chamber (128) from the fourth circulation port (134). The second air flows through the second humidity control chamber (128) and passes through the first adsorption heat exchanger (176). In the first adsorption heat exchanger (176), moisture in the second air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The second air dehumidified by the first adsorption heat exchanger (176) flows into the third chamber (147) from the seventh circulation port (137), passes through the fourth opening (144), and enters the fourth chamber. (148) flows into. The second air flows through the fourth chamber (148), flows out from the outdoor exhaust port (153) to the duct, and is discharged to the outside.

    Next, the second operation of the humidification ventilation operation will be described. As shown in FIGS. 6 and 7, during the second operation, the state of each damper (D11 to D18) is switched, so that the second circulation port (132), the third circulation port (133), The 6th flow port (136) and the 8th flow port (138) are opened, and the first flow port (131), the fourth flow port (134), the fifth flow port (135), and the seventh flow port ( 137) is closed. In the refrigerant circuit (170) during the second operation, the second adsorption heat exchanger (175) serves as an evaporator and the first adsorption heat exchanger (176) serves as a condenser.

    As shown in FIGS. 6, 7, 10, and 11, the air that has passed through the duct and passed through the outdoor air filter (156) flows into the first chamber (145) from the outdoor suction port (150). The first air flowing into the first chamber (145) passes through the first opening (141), flows into the second chamber (146), flows through the second circulation port (132), and enters the second humidity control chamber ( 128). The first air flows through the second humidity control chamber (128) and passes through the first adsorption heat exchanger (176). In the first adsorption heat exchanger (176), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the first air. The first air humidified by the first adsorption heat exchanger (176) flows out from the sixth circulation port (136) to the second intermediate passage (126). The first air flows upward through the first intermediate passage (125) and flows into the third chamber (147), flows through the third chamber (147), and flows out from the indoor air supply port (151) to the duct. Supplied indoors.

    On the other hand, the second air flowing into the second chamber (146) from the indoor suction port (152) passes through the inside air filter (155) and flows from the second opening (142) to the first intermediate passage (125). Then, it flows into the first humidity control chamber (127) from the third circulation port (133). The second air flows through the first humidity control chamber (127) and passes through the second adsorption heat exchanger (175). In the second adsorption heat exchanger (175), moisture in the second air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is adsorbed by the refrigerant. The second air dehumidified by the second adsorption heat exchanger (175) flows into the fourth chamber (148) through the eighth circulation port (138). The second air flows through the fourth chamber (148), flows out from the outdoor exhaust port (153) to the duct, and is discharged to the outside.

<Operation in winter or when outdoor temperature is low>
Next, dehumidification ventilation operation or humidification ventilation operation in winter or when the outdoor temperature becomes low will be described. In an environment where the outside air temperature is low in winter (for example, below 5 ° C.), the second motor-operated valve (195) is set to an open state and the first motor-operated valve (198) is set to a closed state by a controller or the like.

    First, the refrigerant circuit (170) in the first state will be described as shown by the solid line in FIG. In the refrigerant circuit (170) in this state, the refrigerant circulates to perform a refrigeration cycle. At this time, in the refrigerant circuit (170), the refrigerant discharged from the compressor (172) flows into the first adsorption heat exchanger (176), and heat exchange is performed with ambient air. Then, the refrigerant that has flowed out of the first adsorption heat exchanger (176) flows into the auxiliary heat exchanger (194) through the bridge circuit (188). In the auxiliary heat exchanger (194), the air sucked into the first chamber (145) from the outdoor suction port (150) and the gas-liquid two-phase refrigerant flowing out of the first adsorption heat exchanger (176) Heat exchange takes place between them. And the outdoor air taken in in the 1st chamber (145) is heated. The refrigerant that has flowed out of the auxiliary heat exchanger (194) passes through the second motor-operated valve (195), the bridge circuit (188), and the second adsorption heat exchanger (175) in this order, and the second adsorption heat exchanger (175). Evaporates in

    Next, the refrigerant circuit (170) in the second state will be described as indicated by a broken line in FIG. In the refrigerant circuit (170) in this state, the refrigerant circulates to perform a refrigeration cycle. At this time, in the refrigerant circuit (170), the refrigerant discharged from the compressor (172) flows into the second adsorption heat exchanger (175), and heat exchange is performed with ambient air. Then, the refrigerant that has flowed out of the first adsorption heat exchanger (176) flows into the auxiliary heat exchanger (194) through the bridge circuit (188). In the auxiliary heat exchanger (194), the air sucked into the first chamber (145) from the outdoor suction port (150) and the gas-liquid two-phase refrigerant flowing out of the first adsorption heat exchanger (176) Heat exchange takes place between them. And the outdoor air taken in in the 1st chamber (145) is heated. The refrigerant that has flowed out of the auxiliary heat exchanger (194) passes through the second motor-operated valve (195), the bridge circuit (188), and the first adsorption heat exchanger (176) in this order, and the first adsorption heat exchanger (176). Evaporates in

-Effect of Embodiment 1-
According to the first embodiment, since the reheat refrigerant pipe (7) is disposed on the downstream side of the air in the auxiliary heat exchanger (194), the temperature of the air flowing around the reheat refrigerant pipe (7) can be increased. For this reason, the amount of heat radiation to the air around the reheat refrigerant pipe (7) can be suppressed. Thereby, the fall of the refrigerant | coolant temperature which flows in into an auxiliary | assistant heat exchanger (194) from refrigerant | coolant piping (185) can be suppressed. As a result, in the humidity control apparatus including the auxiliary heat exchanger (194) that preheats the outdoor air to be taken in, it is possible to suppress a decrease in the preheating performance in the auxiliary heat exchanger (194).

    In addition, since the refrigerant condensed in each adsorption heat exchanger (175,176) is allowed to flow into the auxiliary heat exchanger (194), the air taken in from the outdoor suction port (150) by the condensed gas-liquid refrigerant Can be heated, and the sensible heat capacity can also be improved.

    Further, since the auxiliary heat exchanger (194) is attached to the lower side of the mounting plate (129) and the opening (130) is provided in the mounting plate (129), the refrigerant pipe (185) connected to the auxiliary heat exchanger (194) is provided. ) Can be located downstream of the air in the auxiliary heat exchanger (194).

    Finally, since the bypass circuit (196) for bypassing the auxiliary heat exchanger (194) by the refrigerant flowing through the refrigerant circuit (170) is provided, the outdoor heat inlet (194) for the outdoor suction port when the outdoor temperature is high, for example. It is possible to prevent the air sucked from (150) from being heated.

    Further, according to the first embodiment, the auxiliary heat exchanger (always) regardless of which of the refrigerant flows related to the refrigerant circuit (170) is switched by the four-way switching valve (173) and the bridge circuit (188). 194) becomes a radiator, and after the outdoor air having a low temperature is heated by the auxiliary heat exchanger (194), it can be introduced into the adsorption heat exchanger (176, 175). As a result, problems such as freezing of the drain water of the adsorption heat exchanger (176, 175) are eliminated, and the humidity control apparatus can be operated well even when the outdoor air is at a low temperature.

    Further, according to the first embodiment, by providing the refrigerant circuit (170) with the bypass pipe (197), at least a part of the refrigerant going to the auxiliary heat exchanger (194) is passed through the bypass pipe (197). Can be bypassed. Thereby, for example, when the temperature of outdoor air is high, it is possible to prevent the outdoor air from being heated unnecessarily.

    Further, according to the first embodiment, the first motor-operated valve and the second motor-operated valve (198, 195) are configured so that the refrigerant expansion operation related to the refrigeration cycle and the refrigerant bypass amount related to the auxiliary heat exchanger (194) are performed. It also serves as both adjustment operation. Accordingly, there is no need to provide two valves for the refrigerant expansion operation and the bypass amount adjustment operation, the number of components of the humidity control device is reduced, and the cost of the humidity control device can be reduced. .

    Further, according to the first embodiment, the first motor-operated valve (198) is fully closed and the second motor-operated valve (195) is appropriately adjusted (for example, the degree of superheat of the refrigerant sucked into the compressor (172)) The refrigerant circuit (170) heats the outdoor air with the auxiliary heat exchanger (194) while performing the refrigeration cycle.

    Further, the second motor-operated valve (195) is fully closed and the first motor-operated valve (198) is appropriately adjusted, so that the outdoor heat is not heated by the auxiliary heat exchanger (194), and the refrigerant circuit (170 ) Can be subjected to a refrigeration cycle. At this time, if the second motor-operated valve (195) is fully closed, refrigerant may accumulate in the auxiliary heat exchanger (194). In this case, the second motor-operated valve (195) is slightly opened, so that the refrigerant flows slightly through the auxiliary heat exchanger (194), and the refrigerant flows into the auxiliary heat exchanger (35, 194). It is possible to prevent accumulation.

    In addition, according to the first embodiment, the check valve bridge circuit (in comparison with the case where the bypass pipe (197) connects the first refrigerant passage (6) and the third refrigerant passage (8)). The amount of refrigerant that accumulates can be reduced by the amount that 188) is not bypassed. Thereby, at the time of the bypass operation in which the refrigerant passes through the bypass pipe (197), the refrigerant shortage due to the accumulation of the refrigerant is less likely to occur, and the bypass operation can be performed stably.

<< Embodiment 2 of the Invention >>
The humidity control apparatus (10) according to the second embodiment of the present invention is a floor-standing humidity control apparatus that is installed on the floor surface of the room and adjusts the humidity of the room. The humidity control apparatus (10) is installed, for example, in a storage space of a closet in which clothes and the like are stored.

  The configuration of the humidity control apparatus (10) will be described with reference to the drawings. In addition, in the following description, the description indicating the directions of “up”, “down”, “right”, “left”, “front”, and “rear” is, as a general rule, the humidity control device (10) shown in FIG. It is based on the case. 15 and 16 schematically show the humidity control device (10). FIG. 15 (A) shows the upper surface of the humidity control device (10), and FIG. 15 (B) shows the humidity control device. FIG. 15C shows the internal structure on the left side of the humidity control apparatus (10), and FIG. 15D shows the internal structure on the right side of the humidity control apparatus. FIG. 16A shows the internal structure of the humidity control apparatus of FIG. 15A from the YY cross section, and FIG. 16B shows the humidity control apparatus of FIG. The internal structure is viewed from the ZZ cross section.

<Case structure>
As shown in FIG. 13, the humidity control apparatus (10) includes a vertically long rectangular parallelepiped box-shaped casing (11). The casing (11) includes a rectangular plate-like bottom plate (12) and a top plate (13), and four rectangular plate-like panels (14, 14) corresponding to the four sides of the bottom plate (12) and the top plate (13). 15,16,17). These panels (14,15,16,17) consist of a front panel (14) on the front side, a rear panel (15) on the rear side, a right side panel (16) on the right side, and a left side panel on the left side ( 17). In the casing (11), the bottom plate (12), the top plate (13), the rear panel (15), the right side panel (16), and the left side panel (17) have a casing body (11a ). The front panel (14) is configured to be detachable from the casing body (11a) via a fastening member such as a screw. The casing (11) has a rear panel (15) installed in the vicinity of the indoor wall.

  The front panel (14) includes a lower panel (14a) that covers the lower space (S1) of the casing (11), an upper panel (14b) that covers the upper space (S3) of the casing (11), and a casing (11) And an intermediate panel (14c) covering the intermediate space (S2). Further, a filter maintenance panel (14d) is provided at the lower left corner of the lower panel (14a). In the front panel (14), these panels (14a, 14b, 14c, 14d) are configured to be individually removable.

  Four duct connection ports (18) are attached to the top plate (13). Specifically, the top plate (13) has an air supply connection port (18a) on the front right side, an exhaust connection port (18b) on the rear right side, and an outside air connection port (18c) on the rear left side. The inside air connection port (18d) is provided on the front left side. The air supply connection port (18a) and the indoor air connection port (18d) communicate with the indoor space via the duct, respectively, and the exhaust connection port (18b) and the outdoor air connection port (18c) communicate with the outdoor space via the duct, respectively. Communicate. That is, in the humidity control apparatus (10), the air supply connection port (18a) and the indoor air connection port (18d) connected to the indoor space are arranged in a concentrated manner on the front side of the casing (11), and are connected to the outdoor space. (18b) and the outside air connection port (18c) are collectively arranged on the rear side of the casing (11). Outdoor air (OA) is sucked into the outdoor air connection port (18c), and indoor air (RA) is sucked into the indoor air connection port (18d). Supply air (SA) is blown into the room from the air supply connection port (18a), and exhaust air (EA) is blown out of the room through the exhaust connection port (18b).

<Frame structure>
As shown in FIG. 14, four vertical frames (support members) (21) corresponding to the four corners of the bottom plate (12) are provided inside the casing (11). These vertical frames (21) include a first vertical frame (21a) on the front right side, a second vertical frame (21b) on the rear right side, a third vertical frame (21c) on the rear left side, and a left side on the front side. It is composed of a fourth vertical frame (21d). Each vertical frame (21) extends vertically to a position slightly above the middle portion in the height direction of the casing (11). That is, in the casing (11), there is no vertical frame directly connected to the bottom plate (12) between the top plate (13) and the upper end of each vertical frame (21).

  Four horizontal frames (22) (beam members) extending in the horizontal direction are bridged on top of each vertical frame (21). These horizontal frames (22) include a first horizontal frame (22a) between a first vertical frame (21a) and a second vertical frame (21b), a second vertical frame (21b), and a third vertical frame ( 21c), a second horizontal frame (22b), a third vertical frame (21c), a third horizontal frame (22c) between the fourth vertical frame (21d), and a fourth vertical frame (21d). And a fourth horizontal frame (22d) between the first vertical frame (21a). The second, third, and fourth horizontal frames (22b, 22c, 22d) are connected to the upper ends of the corresponding vertical frames (21). On the other hand, the first horizontal frame (22a) is connected to a portion slightly lower than the upper ends of the first and second vertical frames (21a, 21b).

  Three intermediate frames (23) extending horizontally are provided on the lower side of the horizontal frame (22). The intermediate frame (23) includes a first intermediate frame (23a) formed below the first horizontal frame (22a) and a second intermediate frame formed below the second horizontal frame (22b). (23b) and a third intermediate frame (23c) formed below the third horizontal frame (22c).

  The vertical frame (21), the horizontal frame (22), and the intermediate frame (23) are heavy components that are relatively heavy among the components of the humidity control device (10). ) And the adsorption heat exchanger (33)) act to constitute a support member that supports them.

<Inside space of casing>
As shown in FIG. 14, the inside of the casing (11) includes a lower space (S1) formed on the back side of the lower panel (14a) and an intermediate space (S2) formed on the back side of the intermediate panel (14c). ) And the upper space (S3) formed on the back side of the upper panel (14b).

<Components in the lower space>
As shown in FIGS. 17 and 18, a lower partition member (41) is installed in the lower space (S1) along the left side panel (17). The lower partition member (41) is made of a resin material such as polystyrene, and is formed in a frame shape in which the upper side and the lower side are opened. The lower partition member (41) includes a lower partition (41a) that divides the lower space (S1) left and right, and a small-diameter cylindrical portion having a substantially rectangular cross section disposed adjacent to the third vertical frame (21c). 41b) and a large-diameter cylindrical portion (41c) having a substantially rectangular cross section disposed adjacent to the fourth vertical frame (21d). An outside air inflow path (61) is defined inside the small diameter cylindrical portion (41b). A reheat chamber (63) is defined inside the large diameter cylindrical portion (41c). The outside air inflow channel (61) and the reheat chamber (63) communicate with each other through the communication port (62) (see FIG. 18).

  The reheat chamber (63) is provided with an upper support plate (41d) formed integrally with the lower partition member (41). The upper support plate (41d) is continuous with the left inner wall of the large-diameter cylindrical portion (41c) and is supported in a horizontal state so as to be parallel to the bottom plate (12). In the reheat chamber (63), a lower outside air flow path (63a) continuous to the communication port (62) is formed below the upper support plate (41d), and a lower outside air flow path (upper side of the upper support plate (41d) ( An upper outside air flow path (63b) continuing to 63a) is formed (see FIGS. 15B and 18). That is, in the reheat chamber (63), the vertical cross section of the air from the inflow side of the lower outside air flow path (63a) to the outflow side of the upper outside air flow path (63b) is substantially U-shaped (U-shaped). A flow path is formed.

  As shown in FIG. 18 and the like, the lower outside air flow path (63a) is provided with an insect filter (26), a pleat filter (27), and a reheat unit (28) in order from the upstream side to the downstream side. It is done.

  The insect filter (26) is a net-like member that captures insects and relatively large dust in the outdoor air. The pleated filter (27) is an air cleaning filter having finer eyes than the insect filter (26), and traps relatively small dust in the outdoor air. The lower partition member (41) is provided with a maintenance lid (41e) on the back side of the filter maintenance panel (14d) described above (see FIG. 17). The maintenance lid (41e) is configured to freely open and close the maintenance ports of the insect removing filter (26) and the pleat filter (27). That is, when the filter maintenance panel (14d) is removed and then the maintenance lid (41e) is opened, the front ends of the insect filter (26) and the pleat filter (27) are exposed to the outside of the casing body (11a).

  The reheat unit (28) has a frame (29) and a reheat heat exchanger (35) fixed inside the frame (29). The frame (29) includes a pair of side stays (29a) and a frame body (29b) that is sandwiched between the pair of side stays (29a) so that the inner wall faces obliquely downward. The frame body (29b) has an obliquely inclined opening surface (29c), and the reheat heat exchanger (35) is held along the opening surface (29c). A reheat heat exchanger (35) comprises the heating heat exchanger which heats outdoor air with a refrigerant | coolant.

  As shown in FIG. 17, in the lower space (S1), the machine room (60) is partitioned in a substantially half on the right side (outside of the lower partition member (41)). In the machine room (60), an electrical component box (90) is installed on the back side of the front panel (14). The electrical component box (90) accommodates electrical components such as a printed circuit board for a power supply circuit of a motor of the compressor (31) and a reactor electrically connected to the circuit on the printed circuit board. In the machine room (60), a compressor (31) and a four-way selector valve (32) are installed on the back side of the electrical component box (90). That is, when the lower panel (14a) of the front panel (14) is removed, the electrical component box (90) is exposed to the outside of the casing body (11a). Further, when the electrical component box (90) is taken out, the compressor (31) and the four-way selector valve (32) are exposed to the outside of the casing body (11a).

<Intermediate space>
In the intermediate space (S2), a first intermediate partition member (43), a second intermediate partition member (44), and a third intermediate partition member (47) are provided in order from the lower side to the upper side. These intermediate partition members (43, 44, 47) are all resin members such as polystyrene molded integrally.

  As shown in FIG. 19, the 1st intermediate | middle division member (43) has obstruct | occluded the upper side open part of the machine room (60). On the upper surface of the first intermediate partition member (43), a frame portion (43a) protruding in a rectangular shape and a pair of concave grooves (43c, 43c) formed on the left and right outer sides of the frame portion (43a) And are formed. The frame portion (43a) is formed across the first intermediate partition member (43). A water receiving portion (43b) for receiving condensed water generated in the humidity control chamber (66a, 66b) is formed inside the frame portion (43a). The water receiving portion (43b) is formed across the first intermediate partition member (43). The bottom surface of the water receiving portion (43b) is inclined so as to face slightly upward from the horizontal plane. That is, the water accumulated in the water receiving portion (43b) is guided forward along the inclined bottom surface. The concave grooves (43c, 43c) extend in the front-rear direction along the left and right side walls of the frame portion (43a).

  As shown in FIG. 20, the second intermediate partition member (44) is supported by the first intermediate frame (23a) and the second intermediate frame (23b) while being predetermined on the upper side of the first intermediate partition member (43). Are arranged at intervals. In the second intermediate partition member (44), concave grooves (44a, 44a) extending in the front-rear direction are formed at positions corresponding to the concave grooves (43c, 43c) of the first intermediate partition member (43).

  On the other hand, as shown in FIG. 19, between the first intermediate partition member (43) and the second intermediate partition member (44), there are two lower damper partition plates (45) and one horizontal partition. A plate (46) is formed. The two lower damper partition plates (45) and the one horizontal partition plate (46) are arranged vertically so that the plate thickness directions thereof are horizontal. The two lower damper partition plates (45) are composed of an outside air damper partition plate (45a) and an exhaust damper partition plate (45b).

  The lower part of the outside air damper partition plate (45a) is fitted into the left groove (43c) of the first intermediate partition member (43), and the upper end of the outside air damper partition plate (45a) is the left groove of the second intermediate partition member (44). (44a). The lower end of the exhaust damper partition member (45b) is fitted into the right groove (43c) of the first intermediate partition member (43), and the upper end of the exhaust damper partition member (45b) is the left groove of the second intermediate partition member (44). (44a). The front end of the lower damper partition (45) is located on the back side of the front panel (14). That is, when the front panel (14) is removed, the front end of the lower damper partition (45) is exposed to the outside of the casing body (11a). In a state where the front panel (14) is removed, the lower damper partition plate (45) can be pulled back and forth along the respective concave grooves (43c, 44a).

  As shown in FIGS. 15, 19, and 20, an intermediate outside air flow path (64) communicating with the reheat chamber (63) is formed on the left side of the outside air damper partition plate (45 a) so as to extend back and forth. The outside air damper partition plate (45a) is provided with a first damper (D1) on the front side and a second damper (D2) on the rear side. On the right side of the exhaust damper partition plate (45b), an intermediate exhaust passage (65) is formed extending forward and backward. The exhaust damper partition plate (45b) is provided with a third damper (D3) on the front side and a fourth damper (D4) on the rear side.

  As shown in FIGS. 19 and 21, the space between the outside air damper partition plate (45a) and the exhaust damper partition plate (45b) is divided into two humidity control chambers (66) in the front and rear directions by the horizontal partition plate (46). It has been. In these humidity control chambers (66), the front space forms a first humidity control chamber (66a), and the rear space forms a second humidity control chamber (66b). The first humidity control chamber (66a) is formed at a position corresponding to the first damper (D1) and the third damper (D3), and the second humidity control chamber (66b) is the second damper (D2) and the fourth damper. It is formed at a position corresponding to the damper (D4). The first humidity control chamber (66a) and the second humidity control chamber (66b) are formed over the inside of the second intermediate partition member (44).

  As shown in FIG. 21, the two adsorption heat exchangers (33) are divided into a first adsorption heat exchanger (33a) housed in the first humidity control chamber (66a) and a second humidity control chamber (66b). It is comprised with the 2nd adsorption heat exchanger (33b) accommodated. The adsorption heat exchanger (33) is configured such that an adsorbent is supported on the surface of a cross fin type fin-and-tube heat exchanger body (34).

  The heat exchanger body (34) of the adsorption heat exchanger (33) includes a copper heat transfer tube (34a) and a number of aluminum fins (34b). The heat transfer tube (34a) has a straight tube portion and a U-shaped portion formed alternately and continuously in a meandering shape. The fin (34b) is formed in a vertically long plate shape, and the straight pipe portion of the heat transfer tube (34a) penetrates in the thickness direction. That is, a large number of fins (34b) are arranged in parallel along the axial direction of the straight tube portion of the heat transfer tube (34a).

  The adsorbent is supported on the surfaces of a large number of fins (34b) and heat transfer tubes (34a). The adsorbent is supported on the surfaces of a large number of fins (34b) and heat transfer tubes (34a). At the interface between the adsorbent and air, the moisture in the air is adsorbed to the adsorbent, or the adsorbed moisture is desorbed into the air (the adsorbent is regenerated). As the adsorbent, zeolite, silica gel, activated carbon, an organic polymer material having a hydrophilic functional group, or the like is used. Moreover, as an adsorbent, you may use the material (what is called a sorbent) which has the function not only to adsorb | suck moisture but to absorb moisture.

  The adsorption heat exchanger (33) is held in the storage chamber (67) so that the short sides of the fins (34b) are vertical and the U-shaped portions of the heat transfer tubes (34a) are located on the left and right sides.

  As shown in FIG. 20, the third intermediate partition member (47) is laminated on the upper side of the second intermediate partition member (44). A pair of wide grooves (47a, 47a) wide on the left and right are formed on the upper surface of the third intermediate partition member (47). A pair of upper damper partition plates (48) are fitted in the thickness direction in these wide grooves (47a). These upper damper partition plates (48) are arranged horizontally so that their thickness directions are vertical. The front end portion of the upper damper partition plate (48) is located on the back side of the front panel (14). That is, when the front panel (14) is removed, the front end portion of the upper damper partition (48) is exposed to the outside of the casing body (11a). When the front panel (14) is removed, the upper damper partition plate (48) can be pulled back and forth along the wide grooves (47a).

  The pair of upper damper partition plates (48) includes a left-side internal air damper partition plate (48a) and a right-side air supply damper partition plate (48b). The inside air damper partition plate (48a) is provided with a fifth damper (D5) on the front side and a sixth damper (D6) on the rear side. The supply damper partition plate (48b) is provided with a seventh damper (D7) on the front side and an eighth damper (D8) on the rear side. The fifth damper (D5) and the seventh damper (D7) are formed at positions corresponding to the first humidity control chamber (66a), and the sixth damper (D6) and the eighth damper (D8) are the second humidity control chamber. It is formed at a position corresponding to the chamber (66b).

  At the corners on the right rear side of the second intermediate partition member (44) and the third intermediate partition member (47), laterally long through holes extending in the front-rear direction are formed, and these through holes are continuously connected to the exhaust communication flow. Constructs a road (68).

  An outside air duct portion (53) of the first upper partition member (51) extends vertically at the left rear corner of the intermediate space (S2) (see FIGS. 20 and 22). The lower end of the outside air duct part (53) is continuous with the large-diameter cylindrical part (41c) of the lower partition member (41). In the intermediate space (S2), a spacer member (24) is provided on the front side of the first humidity control chamber (66a). The spacer member (24) is interposed between the first intermediate partition member (43) and the first intermediate frame (23a) so as to ensure a predetermined interval.

<Upper space>
As shown in FIG. 22, the upper space (S3) is provided with a first upper partition member (51), a second upper partition member (54), and a third upper partition member (80). These partition members (51, 54, 80) are all polystyrene resin materials molded integrally. In the upper space (S3), the four upper chambers (19) are partitioned by these partition members (51, 54, 80). These upper chambers (19) consist of a front right-side indoor air supply chamber (19a), a rear right-side outdoor exhaust chamber (19b), a rear left-side outdoor air suction chamber (19c), and a front left-side indoor air suction Chamber (19d). The indoor air supply chamber (19a) communicates with the air supply connection port (18a), the outdoor exhaust chamber (19b) communicates with the exhaust connection port (18b), and the outdoor air suction chamber (19c) communicates with the external air connection port (18c). The room air suction chamber (19d) communicates with the room air connection port (18d). An air supply fan unit (84) is provided in the indoor air supply chamber (19a), and an exhaust fan unit (87) is provided in the outdoor exhaust chamber (19b).

  The first upper partition member (51) is provided on the left side of the upper space (S3). The first upper partition member (51) extends along the left side wall (52) formed across the front and rear ends of the casing (11) along the left side panel (17), and along the third vertical frame (21c). A cylindrical outside air duct portion (53) extending vertically. The outside air duct part (53) is arranged in the upper space (S3) and continues from the lower end of the large diameter duct part (53a) and the large diameter duct part (53a) that divides the outside air suction chamber (19c) inside. And a small-diameter duct portion (53b) that is disposed in the intermediate space (S2) and has a smaller diameter than the large-diameter duct portion (53a).

  In the upper space (S3), an outside air suction chamber (19c) is formed inside the large diameter duct portion (53a), and an inside air suction chamber (19d) is formed outside the large diameter duct portion (53a). In the upper space (S3), the upper inside air flow path (69) is partitioned from the outer lower side of the large diameter duct portion (53a) to the front panel (14). The upper end of the upper inside air channel (69) communicates with the inside air suction chamber (19d). Further, the fifth damper (D5) and the seventh damper (D7) of the internal air damper partition plate (48a) face the upper internal air flow path (69). A duct internal flow path (71) connected to the outside air inflow path (61) is formed inside the small diameter duct portion (53b) (see FIG. 15B).

  The second upper partition member (54) includes a right side wall portion (55) formed across the front and rear ends of the casing (11) along the right side panel (16) of the casing (11), and an upper space (S3). And a rear side wall portion (57) continuous to each rear end portion of the right side wall portion (55) and the central partition portion (56).

  A pedestal (55a) is formed inside the right side wall (55). The pedestal portion (55a) has a longitudinal section formed in an L shape, and extends back and forth from the rear side wall portion (57) to the front panel (14) side. A first installation surface (55c) on which the fan units (84, 87) and the third upper partition member (80) are installed so as to be able to be guided back and forth is formed on the upper end surface of the pedestal portion (55a).

  A columnar first contact portion (55b) extending in the vertical direction is formed at an intermediate portion in the front-rear direction of the right side wall portion (55). The rear end portion of the third upper partition member (80) contacts the front end of the first contact portion (55b). Further, a sealing material (not shown) is formed on the contact surface with respect to the third upper partition member (80) in the first contact portion (55b).

  The central partition (56) includes a vertical first vertical wall (56a), a horizontal wall (56b) bent horizontally from the lower end of the first vertical wall (56a), and a vertical from the right end of the horizontal wall (56b). And a bent second vertical wall (56c). A second installation surface (56d) on which the fan units (84, 87) and the third upper partition member (80) are installed so as to be guided back and forth is formed on the upper end surface of the central partition (56). .

  The central partition (56) divides the outside air suction chamber (19c) and the inside air suction chamber (19d) arranged in the front-rear direction from the outside exhaust chamber (19b) and the indoor air supply chamber (19a) arranged in the front-rear direction. In addition, a main partition extending in the front and rear direction of the casing (11) is formed. Since the central partition (56) is formed integrally with the right side wall (55) and the rear side wall (57) along the casing (11), the central partition (56) is independent of other members. You can't just remove it.

  A columnar second abutting portion (56e) extending vertically is formed at an intermediate portion in the front-rear direction of the central partition portion (56). The rear end portion of the third upper partition member (80) contacts the front end of the second contact portion (56e). Further, a sealing material (not shown) is formed on the contact surface with respect to the third upper partition member (80) at the second contact portion (56e).

  In the second upper partition member (54), a corner between the right side wall (55) and the rear side wall (57) and a corner between the central partition (56) and the rear side wall (57). In addition, an insertion part (58) is formed respectively. Reinforcing ribs (75) are inserted through the respective insertion portions (58). The upper end of each reinforcing rib (75) is fixed to the top plate (13) of the casing (11). These reinforcing ribs (75) constitute an attachment member to which the exhaust fan unit (87) is fixed and supported.

  The second upper partition member (54) is integrally formed with a horizontal partition portion (59) below the exhaust fan unit (87) (see FIGS. 16A and 17). In the upper space (S3), an outdoor exhaust chamber (19b) is defined on the upper side of the horizontal partition (59), and an upper air supply channel (from the lower side of the horizontal partition (59) to the front panel (14) ( 70) is sectioned. The outdoor exhaust chamber (19b) communicates with the exhaust communication channel (68) shown in FIG. The upper end of the upper air supply channel (70) communicates with the indoor air supply chamber (19a). In addition, the sixth damper (D6) and the eighth damper (D8) of the supply damper partition plate (48b) face the upper supply passage (70).

  As shown in FIG. 17, a columnar third contact portion (59a) extending left and right is formed on the upper surface of the front edge of the horizontal partition portion (59). The rear end portion of the third upper partition member (80) contacts the front end of the third contact portion (59a). Further, a seal material (not shown) is formed on the third contact portion (59a) on the contact surface with respect to the third upper partition member (80).

  As shown in FIG. 22, the third upper partition member (80) includes a first side plate portion (81) formed along the right side wall portion (55) of the second upper partition member (54), and a second upper portion. A second side plate (82) formed along the central partition (56) of the partition member (54), a rear end of the first side plate (81), and a rear end of the second side plate (82) And an intermediate side plate portion (83) formed over the entire area. That is, the cross-sectional shape of the third upper partition member (80) is formed in a substantially U-shape (U-shape) having an open portion on the front side.

  In the third upper partition member (80), the lower ends of the side plate portions (81, 82) are respectively installed on the installation surfaces (55c, 56d) of the second upper partition member (54), and the intermediate side plate portion (83) The left and right end portions of the second upper partition member (54) are disposed so as to abut on the abutment portions (55b, 56e, 59a). When the third upper partition member (80) is arranged in this way, the space between the right side wall portion (55) and the central partition portion (56) is divided into two spaces (ie, the indoor air supply chamber (19a)). And an outdoor exhaust chamber (19b)). The third upper partition member (80) constitutes an air supply / exhaust partition portion that is detachably attached to the casing (11) so as to partition the indoor air supply chamber (19a) and the outdoor exhaust chamber (19b) forward and backward.

  The air supply fan unit (84) includes an air supply fan (85) and an air supply side mounting plate (86) for supporting the air supply fan (85). The air supply fan (85) is a centrifugal multi-blade fan (so-called sirocco fan). The air supply side mounting plate (86) includes a main body (86a) to which the motor of the air supply fan (85) is attached, a side plate (86b) formed on the left and right sides of the main body (86a), (86a) and an upper plate part (86c) formed on the upper side. Each side plate part (86b) of the supply side mounting plate (86) is installed on each installation surface (55c, 56d) of the second upper partition member (54). Further, the right side plate portion (86b) and the upper plate portion (86c) of the supply side mounting plate (86) are connected to the above-described front panel (14) (see FIG. 13) via a fastening member such as a screw. Fixed.

  The exhaust fan unit (87) includes an exhaust fan (88) and an exhaust side mounting plate (89) for supporting the exhaust fan (88). The exhaust fan (88) is a centrifugal multi-blade fan (so-called sirocco fan). The exhaust side mounting plate (89) includes a main body portion (89a) to which the motor of the exhaust fan (88) is mounted, and side plate portions (89b) formed on the left and right sides of the main body portion (89a). . Each side plate part (89b) of the exhaust side mounting plate (89) is installed on each installation surface (55c, 56d) of the second upper partition member (54). Further, these side plate portions (89b) are fixed to the top plate (13) via the reinforcing rib (75) described above.

<Configuration of refrigerant circuit>
The humidity control apparatus (10) includes a refrigerant circuit (30) to which the compressor (31) and the adsorption heat exchanger (33) described above are connected. The configuration of the refrigerant circuit (30) will be described with reference to FIG.

  The refrigerant circuit (30) is a closed circuit to which refrigerant pipes are connected, and is filled with refrigerant. In the refrigerant circuit (30), the refrigerant circulates to perform a vapor compression refrigeration cycle. A compressor (31), a four-way switching valve (32), a first adsorption heat exchanger (33a), and a second adsorption heat exchanger (33b) are connected to the refrigerant circuit (30).

  The compressor (31) has a variable capacity (operating frequency) by so-called inverter control. That is, the motor of the compressor (31) is configured such that the rotation speed can be adjusted according to the output frequency (operating frequency) of the supplied AC power.

  The four-way switching valve (32) has first to fourth ports and is configured to be able to switch the communication state of these ports. The first port of the four-way switching valve (32) is connected to the discharge pipe (31a) of the compressor (31), and the third port of the four-way switching valve (32) is the suction pipe (31b) of the compressor (31). Connected to. The second port of the four-way selector valve (32) is connected to one end of the first adsorption heat exchanger (33a), and the fourth port of the four-way selector valve (32) is the second adsorption heat exchanger (33b). Connected to one end. The four-way switching valve (32) communicates the first port and the fourth port to communicate the second port and the third port (first state shown by the solid line in FIG. 23), the first port and the second port. It is configured to be switchable to a state (second state indicated by a broken line in FIG. 23) in which the two ports are communicated and the third port and the fourth port are communicated. That is, the four-way switching valve (32) includes a flow path in which the refrigerant radiates heat in the second adsorption heat exchanger (33b) and evaporates in the first adsorption heat exchanger (33a), and the first adsorption heat exchanger ( A refrigerant flow path switching mechanism for switching the flow path of the refrigerant circuit (30) to the flow path where the refrigerant radiates heat in 33a) and evaporates in the second adsorption heat exchanger (33b) is configured.

  The refrigerant circuit (30) is provided with a one-way circuit (36) that keeps the refrigerant flow in one direction even when the state of the four-way switching valve (32) is switched. This one-way circuit (36) has a bridge circuit (36a) in which first to fourth check valves (CV-1, CV-2, CV-3, CV-4) are connected in a bridge shape. doing. Each check valve (CV-1, CV-2, CV-3, CV-4) of the bridge circuit (36a) allows the refrigerant to flow in the direction of the arrow in FIG. The flow of is prohibited.

  A first refrigerant passage (6) extending from between the first check valve (CV-1) and the second check valve (CV-2) is provided at the other end of the first adsorption heat exchanger (33a). A second refrigerant passage (7) connected and extending from between the first check valve (CV-1) and the third check valve (CV-3) is provided at one end of the reheat heat exchanger (35). A third refrigerant passage (8) connected between the third check valve (CV-3) and the fourth check valve (CV-4) is connected to the second adsorption heat exchanger (33b). A fourth refrigerant passage (9) connected to the end and extending from between the fourth check valve (CV-4) and the second check valve (CV-2) connects the reheat side expansion valve (38). Then, it is connected to the other end of the reheat heat exchanger (35). The second refrigerant passage (7) is disposed on the downstream side of the air passing through the reheat heat exchanger (35).

  The refrigerant circuit (30) is provided with a bypass pipe (36b) that connects the two refrigerant passages (7) and the fourth refrigerant passage (9). A main expansion valve (37) is attached to the bypass pipe (36b). The main expansion valve (37) and the reheat side expansion valve (38) are electrically operated flow rate control valves whose opening degree is variable, and are constituted by, for example, electronic expansion valves.

<Control unit and sensor>
As shown in FIG. 23, the humidity control apparatus (10) includes a controller (100) and various sensors. The controller (100) adjusts the operating capacity of the compressor (31) and the opening of each expansion valve (37, 38) according to the operating conditions and the detection values of the sensors. Further, the controller (100) adjusts the open / close state of each damper (D1 to D8) and the operating air volume of each fan (85, 88) according to the operating conditions.

  As schematically shown in FIG. 15B, the humidity controller (10) of the second embodiment includes an inside air humidity sensor (111), an outside air humidity sensor (113), and a first outside air temperature sensor (114). And a second outside temperature sensor (115).

  The room air humidity sensor (111) is disposed in the upper room air flow path (69). The room air humidity sensor (111) detects the humidity (relative humidity) of the room air (RA) taken into the room air suction chamber (19d).

  The outside air humidity sensor (113) and the first outside air temperature sensor (114) are disposed between the filter (26, 27) and the reheat heat exchanger (35) in the lower outside air flow path (63a). The outdoor air humidity sensor (113) detects the humidity (relative humidity) of the outdoor air (OA) upstream of the reheat heat exchanger (35), and the first outdoor air temperature sensor (114) is the reheat heat exchanger (35). ) Detect the temperature of the outdoor air (OA) upstream. The second outside air temperature sensor (115) is disposed on the downstream side of the reheat heat exchanger (35) in the lower outside air passage (63a). The second outside air temperature sensor (115) detects the temperature of the outdoor air (OA) on the downstream side of the reheat heat exchanger (35).

  In the controller (100) of the second embodiment, based on the detection values of these sensors (111, 113, 114, 115), the required humidity control capacity of the humidity control device (10) (humidification load during dehumidification operation or humidification load during humidification operation) ) Is required. The controller (100) controls the operating capacity of the compressor (31) (that is, the refrigerant circulation amount of the refrigerant circuit (30)) so as to satisfy this humidity control capability.

-Driving action-
Next, the operation of the humidity control apparatus (10) will be described in order with reference to the drawings. The humidity control apparatus (10) is executed by switching between a dehumidifying operation for dehumidifying the room and a humidifying operation for humidifying the room.

<Dehumidifying operation>
The dehumidifying operation is performed under conditions where the outdoor temperature and humidity are relatively high in summer and the like. In this dehumidifying operation, outdoor air (OA) is dehumidified, and the dehumidified air is supplied indoors as supply air (SA). At the same time, in the dehumidifying operation, the room air (RA) is discharged to the outside as exhaust air (EA). In the dehumidifying operation, the first operation and the second operation are alternately performed at predetermined intervals, and the room is continuously dehumidified.

  In the first operation of the dehumidifying operation, in the refrigerant circuit (30) shown in FIG. 23, the four-way switching valve (32) is set to the first state, and the reheat side expansion valve (38) is almost fully closed. The expansion valve (37) is opened at a predetermined opening. When the compressor (31) is operated, the refrigerant compressed by the compressor (31) dissipates heat in the second adsorption heat exchanger (33b), passes through the bridge circuit (36a), and bypass piping (36b) Flowing. In the bypass pipe (36b), the refrigerant is decompressed by the main expansion valve (37). The refrigerant decompressed by the main expansion valve (37) passes through the bridge circuit (36a), evaporates in the first adsorption heat exchanger (33a), and is sucked into the compressor (31).

  In the second operation of the dehumidifying operation, in the refrigerant circuit (30) shown in FIG. 23, the four-way switching valve (32) is set to the second state, and the reheat side expansion valve (38) is almost fully closed. The expansion valve (37) is opened at a predetermined opening. When the compressor (31) is operated, the refrigerant compressed by the compressor (31) dissipates heat in the first adsorption heat exchanger (33a), passes through the bridge circuit (36a), and bypass piping (36b) Flowing. In the bypass pipe (36b), the refrigerant is decompressed by the main expansion valve (37). The refrigerant decompressed by the main expansion valve (37) passes through the bridge circuit (36a), evaporates in the second adsorption heat exchanger (33b), and is sucked into the compressor (31).

  As described above, in the dehumidifying operation of the humidity control apparatus (10), in principle, no refrigerant is supplied to the reheat heat exchanger (35). That is, in the dehumidifying operation, the reheat heat exchanger (35) is stopped.

  In the first operation of the dehumidifying operation, as shown in FIGS. 24 and 25, the first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are opened. The second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are closed, and the air supply fan (85) and the exhaust fan (88) are operated. . In FIGS. 24 to 27, the hatched damper is in the closed state, and the white damper is in the open state. In FIG. 24 to FIG. 27, white arrows represent the air (outdoor air (OA) or supply air (SA)) supplied from the outside to the room, and the black arrows are discharged from the room to the outside. Air (room air (RA) or exhaust air (EA)).

  In the first operation of the dehumidifying operation, the outdoor air (OA) taken into the outside air suction chamber (19c) via the duct flows in the duct inner passage (71) and the outside air inflow passage (61) in this order, It flows into the outside air flow path (63a). The air flows through the insect filter (26) and the pleat filter (27) in order, and then passes through the reheat heat exchanger (35). In the dehumidifying operation, the reheat heat exchanger (35) is stopped as described above. For this reason, air is not heated in the reheat heat exchanger (35).

  The air that has passed through the reheat heat exchanger (35) flows through the upper outside air passage (63b), the intermediate outside air passage (64), and the first damper (D1) in this order, and then passes through the first adsorption heat exchanger (33a). To do. In the first adsorption heat exchanger (33a) in the evaporator state, water vapor in the air is adsorbed by the adsorbent. The heat of adsorption generated at this time is used for the heat of evaporation of the refrigerant. The air adsorbed and dehumidified by the first adsorption heat exchanger (33a) flows through the seventh damper (D7), the upper air supply channel (70), and the indoor air supply chamber (19a) in this order, and passes through the duct. Supplied to the indoor space as supply air (SA).

  In the first operation of the dehumidifying operation, the room air (RA) taken into the room air suction chamber (19d) via the indoor duct flows in order through the upper room air flow path (69) and the sixth damper (D6). And passing through the second adsorption heat exchanger (33b). In the second adsorption heat exchanger (33b) in the state of a radiator, water vapor is desorbed from the adsorbent into the air, and the adsorbent is regenerated. The air used for regeneration of the adsorbent of the second adsorption heat exchanger (33b) is the fourth damper (D4), the intermediate exhaust passage (65), the exhaust communication passage (68), the outdoor exhaust chamber (19b) In order, and is discharged as exhaust air (EA) to the outdoor space via the duct.

  In the second operation of the dehumidifying operation, as shown in FIGS. 26 and 27, the second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are opened. The first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are closed, and the air supply fan (85) and the exhaust fan (88) are operated. .

  In the second operation of the dehumidifying operation, the outdoor air (OA) taken into the outside air suction chamber (19c) via the duct flows in the duct inner passage (71) and the outside air inflow passage (61) in this order, It flows into the outside air flow path (63a). The air flows through the insect filter (26) and the pleat filter (27) in order, and then passes through the reheat heat exchanger (35). In the dehumidifying operation, the reheat heat exchanger (35) is stopped as described above. For this reason, air is not heated in the reheat heat exchanger (35).

  The air that has passed through the reheat heat exchanger (35) flows through the upper outside air passage (63b), the intermediate outside air passage (64), and the second damper (D2) in this order, and then passes through the second adsorption heat exchanger (33b). To do. In the second adsorption heat exchanger (33b) in the evaporator state, water vapor in the air is adsorbed by the adsorbent. The heat of adsorption generated at this time is used for the heat of evaporation of the refrigerant. The air adsorbed and dehumidified by the second adsorption heat exchanger (33b) flows through the eighth damper (D8), the upper air supply channel (70), and the indoor air supply chamber (19a) in this order, via the duct. Supplied to the indoor space as supply air (SA).

  In the second operation of the dehumidifying operation, the room air (RA) taken into the room air suction chamber (19d) via the indoor duct flows in order through the upper room air flow path (69) and the fifth damper (D5). And passes through the first adsorption heat exchanger (33a). In the first adsorption heat exchanger (33a) in the state of a radiator, water vapor is desorbed from the adsorbent into the air, and the adsorbent is regenerated. The air used for the regeneration of the adsorbent of the first adsorption heat exchanger (33a) passes through the third damper (D3), the intermediate exhaust passage (65), the exhaust communication passage (68), the outdoor exhaust chamber. (19b) flows in order and is discharged as exhaust air (EA) to the outdoor space via the duct.

<Humidification operation>
The humidification operation is performed under conditions where the outdoor temperature and humidity are relatively low in winter and the like. In this humidification operation, outdoor air (OA) is humidified, and the humidified air is supplied indoors as supply air (SA). At the same time, in the humidifying operation, the room air (RA) is discharged to the outside as exhaust air (EA). In this humidification operation, the first operation and the second operation are alternately performed at predetermined intervals, and the room is continuously humidified.

  In the first operation of the humidifying operation, in the refrigerant circuit (30) shown in FIG. 23, the four-way switching valve (32) is set to the second state, the main expansion valve (37) is closed, and the reheat side expansion valve (38 ) Is opened at a predetermined opening. When the compressor (31) is operated, the refrigerant compressed by the compressor (31) dissipates heat in the first adsorption heat exchanger (33a), passes through the bridge circuit (36a), and is in a gas-liquid two-phase state. The high-pressure refrigerant flows through the reheat heat exchanger (35), and this refrigerant radiates heat to the air (outdoor air (OA)). The refrigerant radiated by the reheat heat exchanger (35) is decompressed by the reheat side expansion valve (38). The refrigerant decompressed by the reheat side expansion valve (38) passes through the bridge circuit (36a), evaporates in the second adsorption heat exchanger (33b), and is sucked into the compressor (31).

  In the second operation of the humidifying operation, in the refrigerant circuit (30) shown in FIG. 23, the four-way switching valve (32) is set to the first state, the main expansion valve (37) is closed, and the reheat side expansion valve (38 ) Is opened at a predetermined opening. When the compressor (31) is operated, the refrigerant compressed by the compressor (31) dissipates heat in the second adsorption heat exchanger (33b), passes through the bridge circuit (36a), and is in a gas-liquid two-phase state. The high-pressure refrigerant flows through the reheat heat exchanger (35), and this refrigerant radiates heat to the air (outdoor air (OA)). The refrigerant radiated by the reheat heat exchanger (35) is decompressed by the reheat side expansion valve (38). The refrigerant decompressed by the reheat side expansion valve (38) passes through the bridge circuit (36a), evaporates by the first adsorption heat exchanger (33a), and is sucked into the compressor (31).

  As described above, in the humidifying operation of the humidity control apparatus (10), the refrigerant is supplied to the reheat heat exchanger (35), and the reheat heat exchanger (35) is operated. The heating capacity of the reheat heat exchanger (35) is appropriately adjusted according to the opening degree of the reheat side expansion valve (38). In this humidification operation, if the temperature of the outdoor air (OA) becomes higher than the predetermined temperature, the reheat side expansion valve (38) is almost fully closed, and the main expansion valve (37) is opened at a predetermined opening degree. Is done. Thereby, air can be humidified by each adsorption heat exchanger (33a, 33b), stopping a reheat heat exchanger (35).

  In the first operation of the humidifying operation, as shown in FIGS. 24 and 25, the first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are opened. The second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are closed, and the air supply fan (85) and the exhaust fan (88) are operated. .

  In the first operation of the humidifying operation, the outdoor air (OA) taken into the outside air suction chamber (19c) via the duct flows in the duct inner passage (71) and the outside air inflow passage (61) in this order. It flows into the outside air flow path (63a). The air flows through the insect filter (26) and the pleat filter (27) in order, and then passes through the reheat heat exchanger (35). In the humidification operation, a refrigerant is appropriately supplied to the reheat heat exchanger (35), and the outdoor air (OA) is heated by the reheat heat exchanger (35).

  The air heated by the reheat heat exchanger (35) flows through the upper outside air passage (63b), the intermediate outside air passage (64), and the first damper (D1) in this order, and passes through the first adsorption heat exchanger (33a). pass. In the first adsorption heat exchanger (33a) in the state of a radiator, water vapor is desorbed from the adsorbent into the air, and the air is humidified. The air humidified by the first adsorption heat exchanger (33a) flows in order through the seventh damper (D7), the upper air supply channel (70), and the indoor air supply chamber (19a), and enters the indoor space via the duct. Supplied as supply air (SA).

  In the first operation of the humidification operation, the room air (RA) taken into the room air suction chamber (19d) via the indoor duct flows in order through the upper room air flow path (69) and the sixth damper (D6). And passing through the second adsorption heat exchanger (33b). In the second adsorption heat exchanger (33b) in the evaporator state, water vapor in the air is adsorbed by the adsorbent, and moisture is given to the adsorbent. The air given moisture to the adsorbent of the second adsorption heat exchanger (33b) passes through the fourth damper (D4), the intermediate exhaust passage (65), the exhaust communication passage (68), and the outdoor exhaust chamber (19b). It flows in order and is discharged as exhaust air (EA) to the outdoor space via the duct.

  In the second operation of the humidifying operation, as shown in FIGS. 26 and 27, the second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are opened. The first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are closed, and the air supply fan (85) and the exhaust fan (88) are operated. .

  In the second operation of the humidifying operation, the outdoor air (OA) taken into the outside air suction chamber (19c) via the duct flows in the duct inner passage (71) and the outside air inflow passage (61) in this order, It flows into the outside air flow path (63a). The air flows through the insect filter (26) and the pleat filter (27) in order, and then passes through the reheat heat exchanger (35). In the humidification operation, a refrigerant is appropriately supplied to the reheat heat exchanger (35), and the outdoor air (OA) is heated by the reheat heat exchanger (35).

  The air heated by the reheat heat exchanger (35) flows through the upper outside air passage (63b), the intermediate outside air passage (64), and the second damper (D2) in this order, and passes through the second adsorption heat exchanger (33b). pass. In the second adsorption heat exchanger (33b) in the state of a radiator, water vapor is desorbed from the adsorbent into the air, and the air is humidified. The air humidified by the second adsorption heat exchanger (33b) flows in order through the eighth damper (D8), the upper air supply channel (70), and the indoor air supply chamber (19a), and enters the indoor space via the duct. Supplied as supply air (SA).

  In the second operation of the humidifying operation, the room air (RA) taken into the room air suction chamber (19d) via the indoor duct flows in order through the upper room air flow path (69) and the fifth damper (D5). And passes through the first adsorption heat exchanger (33a). In the first adsorption heat exchanger (33a) in the evaporator state, water vapor in the air is adsorbed by the adsorbent, and moisture is given to the adsorbent. The air that has given moisture to the adsorbent of the first adsorption heat exchanger (33a) passes through the third damper (D3), the intermediate exhaust passage (65), the exhaust communication passage (68), and the outdoor exhaust chamber (19b). It flows in order and is discharged as exhaust air (EA) to the outdoor space via the duct.

-Effect of Embodiment 2-
According to the second embodiment, the reheat heat exchanger (35) is always operated regardless of which refrigerant flow is switched to the refrigerant circuit (30) by the four-way switching valve (32) and the bridge circuit (36a). Becomes a radiator and can be introduced into the adsorption heat exchanger (33a, 33b) after the outdoor air having a low temperature is heated by the reheat heat exchanger (35). As a result, problems such as freezing of the drain water of the adsorption heat exchanger (33a, 33b) are eliminated, and the humidity control apparatus can be operated well even when the outdoor air is at a low temperature.

    Further, according to the second embodiment, by providing a bypass pipe (36b) in the refrigerant circuit (30), at least a part of the refrigerant going to the reheat heat exchanger (35) is bypassed through the bypass pipe (36b). Can be made. Thereby, for example, when the temperature of outdoor air is high, it is possible to prevent the outdoor air from being heated unnecessarily.

    Further, according to the second embodiment, the main expansion valve and the reheat side expansion valve (37, 38) have the refrigerant expansion operation related to the refrigeration cycle and the refrigerant bypass amount related to the reheat heat exchanger (35). It also serves as both adjustment operation. Accordingly, there is no need to provide two valves for the refrigerant expansion operation and the bypass amount adjustment operation, the number of components of the humidity control device is reduced, and the cost of the humidity control device can be reduced. .

    Further, according to the second embodiment, the check valve bridge circuit (36a) is compared with the case where the bypass pipe (36b) connects the first refrigerant passage (6) and the third refrigerant passage (8). ) Can be reduced as much as the refrigerant is not bypassed. Thereby, at the time of the bypass operation in which the refrigerant passes through the bypass pipe (36b), the refrigerant shortage due to the accumulation of the refrigerant hardly occurs, and the bypass operation can be stably performed.

<Other embodiments>
The present invention may be configured as follows with respect to the above embodiment.

    In the first embodiment, the adsorbent is mainly a material that adsorbs water vapor, such as zeolite or silica gel. However, the present invention is not limited to this, and a material that performs both adsorption and absorption of water vapor (so-called absorption). Adhesive) may be used.

    Specifically, in the adsorbent according to the other embodiment 1 of the present invention, an organic polymer material having hygroscopicity is used as the adsorbent. In an organic polymer material used as an adsorbent, a plurality of polymer main chains having hydrophilic polar groups in the molecule are cross-linked with each other, and the plurality of polymer main chains cross-linked with each other form a three-dimensional structure. Forming.

    The adsorbent of this form swells by capturing (that is, absorbing moisture) water vapor. The mechanism by which the adsorbent swells by absorbing moisture is presumed as follows. In other words, when this adsorbent absorbs moisture, water vapor is adsorbed around the hydrophilic polar group, and the electric force generated by the reaction between the hydrophilic polar group and water vapor acts on the polymer main chain. As a result, the polymer main chain is deformed. Then, water vapor is taken into the gap between the deformed polymer main chains by capillary force, and when the water vapor enters, a three-dimensional structure composed of a plurality of polymer main chains swells, resulting in an increase in the volume of the adsorbent. .

    As described above, in the adsorbent of the first embodiment, both the phenomenon in which water vapor is adsorbed by the adsorbent and the phenomenon in which water vapor is absorbed by the adsorbent occur. That is, water vapor is sorbed on the adsorbent. Further, the water vapor trapped in the sorbent enters not only the surface of the three-dimensional structure composed of a plurality of polymer main chains cross-linked with each other but also into the interior thereof. As a result, a large amount of water vapor is trapped in this adsorbent as compared with zeolite that only adsorbs water vapor on the surface.

    Further, the adsorbent shrinks by releasing water vapor (that is, moisture release). That is, when this adsorbent dehumidifies, the amount of water trapped in the gap between the polymer main chains decreases, and the shape of the three-dimensional structure composed of a plurality of polymer main chains is reduced. The volume of the adsorbent decreases as it returns.

    In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

    As described above, the present invention is useful for a humidity control apparatus.

111 Casing 129 Mounting plate 130 Pipe communication part 150 Outdoor suction port 151 Indoor air supply port 170 Refrigerant circuit 175 First adsorption heat exchanger 176 Second adsorption heat exchanger 194 Auxiliary heat exchanger 195 First electric valve 196 Bypass circuit

    The present invention relates to a humidity control apparatus, and particularly relates to a means for preheating the taken outdoor air.

    2. Description of the Related Art Conventionally, there has been known a humidity control apparatus that includes a refrigerant circuit to which two adsorption heat exchangers are connected, adjusts outdoor air or indoor air, and supplies the air after humidity adjustment to the room. In this type of humidity control apparatus, as shown in Patent Document 1, by switching the refrigerant circulation direction of the refrigerant circuit reversibly, the first adsorption heat exchanger serves as a condenser and the second adsorption heat exchanger serves as an evaporator, respectively. The operation that functions and the operation that the first adsorption heat exchanger functions as an evaporator and the second adsorption heat exchanger functions as a condenser are alternately performed. And in this humidity control apparatus, one of the air which passed each adsorption heat exchanger is supplied indoors, and the other is discharged | emitted outside, and a dehumidification operation or a humidification operation is performed. For example, in the dehumidifying operation, air that has passed through an adsorption heat exchanger that serves as an evaporator is supplied to the room. In a humidifying operation, air that has passed through an adsorption heat exchanger that serves as a condenser is supplied to the room. .

JP 2005-291532 A

    However, in an environment where the temperature of the outdoor air (outside air temperature) is low (for example, 15 ° C. below freezing point), the damper or the like for switching the operation of each of the adsorption heat exchangers freezes or drain water from each of the adsorption heat exchangers. Occurs or the drain water freezes.

    This invention is made in view of such a point, and it is in making it possible to perform a favorable operation of a humidity control apparatus, even when the temperature (outside air temperature) of outdoor air is low temperature.

The first invention is directed to a humidity control apparatus. The compressor (31,172), the first adsorption heat exchanger (33a, 176) and the second adsorption heat exchanger (33b, 175) carrying the adsorbent, the auxiliary heat exchanger (35,194), the expansion mechanism ( 37,38,198,195 ) is connected to the refrigerant circuit (30,170) for performing the refrigeration cycle by circulating the refrigerant, and the outdoor air that has passed through the auxiliary heat exchanger (35,194) is converted into the first adsorption heat exchanger ( a first condition to be humidity control in the adsorbent 33a, 176), the outdoor air having passed through the auxiliary heat exchanger (35,194) is humidity adsorbent of the second adsorption heat exchanger (33b, 175) An air side switching unit (D1 to D4, D13 to D16) that can be switched to the second state, and the refrigerant circuit (30, 170) are connected to the first adsorption heat exchanger (33a, 176) and the auxiliary unit. heat exchanger (35,194) refrigerant releases heat the second adsorption heat exchanger (33b, 175) a first state in which the refrigerant absorbs heat in, the second adsorption heat exchanger (33b, 175) and the Auxiliary heat exchanger (35,194) refrigerant releases heat in the in the first adsorption heat exchanger (33a, 176) switchable to a second state in which the refrigerant absorbs heat in the refrigerant side of the switching unit (32,36a, 173,188) When the refrigerant side switching section (32, 36a, 173, 188) is in the first state, the refrigerant that has passed through the first adsorption heat exchanger (33a, 176) is the auxiliary heat exchanger (35, 194). ) And the refrigerant-side switching section (32, 36a, 173, 188) is in the second state, the refrigerant that has passed through the second adsorption heat exchanger (33b, 175) passes through the auxiliary heat exchanger ( 35,194) .

In the first invention, outdoor air heated by the auxiliary heat exchanger (35, 194) can be introduced into the adsorption heat exchanger (33a, 33b, 175 , 176 ). Here, the refrigerant side of the switching unit (32,36a, 173,188) switches the refrigerant flow definitive in the refrigerant circuit (30,170). For example, when the refrigerant side switching section (32 , 36a, 173 , 188 ) is in the first state , the compressor (31, 172), the first adsorption heat exchanger (33a, 176), the auxiliary heat exchanger (35, 194), The refrigerant flows in the order of the expansion mechanism (37 , 38 , 198, 195 ) and the second adsorption heat exchanger (33b, 175) . When the refrigerant side switching section (32 , 36a, 173 , 188 ) is in the second state , the compressor (31, 172), the second adsorption heat exchanger (33b, 175), the auxiliary heat exchanger (35, 194), the expansion mechanism ( 37,38,198,195 ), the refrigerant flows in the order of the first adsorption heat exchanger (33a, 176) . The auxiliary heat exchanger (35, 194) is always a radiator regardless of whether the refrigerant side switching section (32, 36a, 173, 188) is in the first state or the second state . As a result, the outdoor air heated by the auxiliary heat exchanger (35, 194) can always be introduced into the adsorption heat exchanger regardless of the switching operation of the refrigerant side switching section (32 , 36a, 173 , 188 ).

    According to a second aspect, in the first aspect, the refrigerant circuit (30, 170) is provided with a bypass passage (36b, 197) that bypasses the auxiliary heat exchanger (35, 194).

In the second invention, for example, when the temperature of the outdoor air is high and there is no problem such as freezing of the drain water of the adsorption heat exchanger (33a, 33b, 175 , 176 ), it is necessary to heat the outdoor air. Therefore, the bypass passage (36b, 197) was provided to bypass the refrigerant going to the auxiliary heat exchanger (35, 194).

According to a third invention, in the second invention, the expansion mechanism ( 37,38,198,195 ) includes the first expansion valve (37,198) for depressurizing the refrigerant flowing through the bypass passage (36b, 197) and the auxiliary. The second expansion valve (38,195) is used to depressurize the refrigerant that has passed through the heat exchanger (35,194).

    In the third aspect of the invention, both the expansion operation of the refrigerant related to the refrigeration cycle and the adjustment operation of the bypass amount of the refrigerant related to the auxiliary heat exchanger (35,194) are performed as the first expansion valve (37,198) and the second expansion valve. It is possible to do with a valve (38,195). Fully close the first expansion valve (37,198) and adjust the second expansion valve (38,195) as appropriate (for example, adjust the superheat degree of the refrigerant sucked into the compressor (31,172) to a predetermined value). As a result, the refrigerant circuit (30,170) heats the outdoor air with the auxiliary heat exchanger (35,194) while performing the refrigeration cycle.

    Further, the refrigerant circuit (30,170) is heated without fully heating the outdoor air by the auxiliary heat exchanger (35,194) by fully closing the second expansion valve (38,195) and adjusting the first expansion valve (37,198) as appropriate. ) Can be subjected to a refrigeration cycle. At this time, if the second expansion valve (38, 195) is fully closed, refrigerant may accumulate in the auxiliary heat exchanger (35, 194). In this case, by slightly opening the second expansion valve (38,195), the refrigerant flows through the auxiliary heat exchanger (35,194) slightly, and the refrigerant flows into the auxiliary heat exchanger (35,194). It is possible to prevent accumulation.

In a fourth aspect based on the third aspect, the refrigerant-side switching portion (32 , 36a, 173 , 188 ) includes first to fourth check valves (CV-1 to CV-4 , 189a to 191a ). A first refrigerant passage (36a, 188) having a check valve bridge circuit (36a, 188) and extending from between the first check valve (CV-1, 189a) and the second check valve (CV-2, 190a) 6) is connected to one end of the first adsorption heat exchanger (33a, 176) and extends from between the first check valve (CV-1,189a) and the third check valve (CV-3,191a). A second refrigerant passage (7) is connected to one end of the auxiliary heat exchanger (35,194), and between the third check valve (CV-3,191a) and the fourth check valve (CV-4,192a). A third refrigerant passage (8) extending from the second adsorption heat exchanger (33b, 175) is connected to one end of the second check valve (CV-4, 192a) and the second check valve (CV-2, 190). fourth refrigerant passage extending from between a) (9) is an auxiliary heat exchanger through the second expansion valve (38,195) (35,194) While connected to the other end, the bypass passage (36b, 197) is characterized by connecting the second refrigerant passage (7) and a fourth refrigerant passage (9).

    In the fourth invention, the refrigerant flows through the bypass passage (36b, 197) by bypassing the auxiliary heat exchanger (35, 194) and the second expansion valve (38, 195). In this case, not all the refrigerant flows toward the bypass passage (36b, 197), and a part of the refrigerant flows and accumulates toward the auxiliary heat exchanger (35, 194) and the second expansion valve (38, 195). is there.

    If the bypass passage (36b, 197) connects the first refrigerant passage (6) and the third refrigerant passage (8), the auxiliary heat exchanger (35, 194) and the second expansion valve are connected. (38,195) and the check valve bridge circuit (36a, 188) are bypassed, and the refrigerant also accumulates in the check valve bridge circuit (36a, 188). If the bypass passage (36b, 197) is provided as in the fourth aspect of the invention, the refrigerant does not accumulate in the check valve bridge circuit (36a, 188), and the refrigerant is insufficient in the humidity control operation due to the accumulation of refrigerant. Is less likely to occur.

According to the present invention, the auxiliary heat exchanger (35,194) is always a radiator regardless of whether the refrigerant side switching section (32 , 36a, 173 , 188) is switched to the first state or the second state. it can be introduced into the adsorption heat exchanger after heating in the outdoor air of low temperature auxiliary heat exchanger (35,194) (33a, 33b, 175, 176). As a result, problems such as freezing of the drain water of the adsorption heat exchanger (33a, 33b, 175 , 176 ) are eliminated, and the humidity control apparatus can be operated well even when the outdoor air is at a low temperature. .

    Further, according to the second aspect of the invention, by providing the refrigerant circuit (30,170) with the bypass passage (36b, 197), the refrigerant directed to the auxiliary heat exchanger (35,194) through the bypass passage (36b, 197). Can be bypassed at least in part. Thereby, for example, when the temperature of outdoor air is high, it is possible to prevent the outdoor air from being heated unnecessarily.

Further, according to the third aspect of the invention, the first expansion valve and the second expansion valve (37, 38, 198 , 195 ) are adapted to cause the refrigerant expansion operation related to the refrigeration cycle and the auxiliary heat exchanger (35,194). ) And the refrigerant bypass amount adjusting operation. Accordingly, there is no need to provide two valves for the refrigerant expansion operation and the bypass amount adjustment operation, the number of components of the humidity control device is reduced, and the cost of the humidity control device can be reduced. .

    Further, according to the fourth aspect of the invention, the check valve is compared with the case where the bypass passage (36b, 197) connects the first refrigerant passage (6) and the third refrigerant passage (8). The amount of refrigerant that accumulates can be reduced by an amount that does not bypass the bridge circuit (36a, 188). As a result, during the bypass operation in which the refrigerant passes through the bypass passages (36b, 197), the refrigerant shortage due to the accumulation of the refrigerant is less likely to occur, and the bypass operation can be performed stably.

It is a schematic block diagram of the humidity control apparatus which concerns on Embodiment 1. FIG. 2 is a schematic perspective view showing an internal structure of a casing according to Embodiment 1. FIG. It is a schematic block diagram of the humidity control apparatus which concerns on Embodiment 1, FIG. 3 (A) shows a top view, FIG.3 (B) shows the WW arrow view of FIG. 3 (A), FIG. 3C shows the XX arrow view of FIG. 3A, FIG. 3D shows the YY arrow view of FIG. 3A, and FIG. 3E shows FIG. FIG. It is a perspective view explaining the flow of the air suck | inhaled from the outdoor suction inlet among the air flows in the 1st operation | movement of the dehumidification ventilation driving | operation of the humidity control apparatus which concerns on Embodiment 1, and a humidification ventilation driving | operation. It is a perspective view explaining the flow of the air suck | inhaled from the indoor suction opening among the air flows in the 1st operation | movement of the dehumidification ventilation driving | operation of the humidity control apparatus which concerns on Embodiment 1, and a humidification ventilation driving | operation. It is a perspective view explaining the flow of the air suck | inhaled from the outdoor suction inlet among the air flows in the 2nd operation | movement of the dehumidification ventilation driving | operation of the humidity control apparatus which concerns on Embodiment 1, and a humidification ventilation driving | operation. It is a perspective view explaining the flow of the air suck | inhaled from the indoor suction inlet among the air flows in the 2nd operation | movement of the dehumidification ventilation driving | operation of the humidity control apparatus which concerns on Embodiment 1, and a humidification ventilation driving | operation. It is a perspective view which shows the structure of the adsorption heat exchanger in Embodiment 1. FIG. It is a piping system diagram showing the refrigerant circuit of the humidity control apparatus according to the first embodiment. It is a schematic diagram explaining the flow of the air inhaled from the outdoor inlet of the humidity control apparatus which concerns on Embodiment 1. FIG. It is a schematic diagram explaining the flow of the air sucked from the indoor suction port of the humidity control apparatus according to the first embodiment. It is a schematic perspective view which shows the internal structure of the casing of the humidity control apparatus which concerns on a prior art example. FIG. 13 is a perspective view illustrating a casing structure of the humidity control apparatus according to the second embodiment. FIG. 14 is a perspective view illustrating a frame structure of the humidity control apparatus according to the second embodiment. FIG. 15 is a configuration diagram schematically showing a humidity control apparatus according to the second embodiment. FIG. 15A is a top view of the humidity control apparatus, and FIG. 15B is an internal structure of the humidity control apparatus. 15C shows the internal structure of the humidity control apparatus from the left side, and FIG. 15D shows the internal structure of the humidity control apparatus from the right side. FIG. 16 is a configuration diagram schematically illustrating the humidity control apparatus according to the second embodiment. FIG. 16A illustrates the internal structure of the humidity control apparatus as viewed from the YY cross section of FIG. FIG. 16 (B) shows the internal structure of the humidity control apparatus as viewed from the ZZ cross section of FIG. 16 (A). FIG. 17 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the internal structure of the lower space. FIG. 18 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the peripheral structure of the reheat heat exchanger. FIG. 19 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the peripheral structure of the lower damper. FIG. 20 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the peripheral structure of the upper damper. FIG. 21 is a perspective view of the adsorption heat exchanger according to the second embodiment in which a surrounding humidity control chamber is added using a virtual line. FIG. 22 is a perspective view showing the internal structure of the humidity control apparatus according to the second embodiment, and particularly shows the internal structure of the upper space. FIG. 23 is a schematic configuration diagram of a refrigerant circuit of the humidity control apparatus according to the second embodiment. FIG. 24 is a diagram corresponding to FIG. 15 illustrating the air flow of the first operation during the dehumidifying operation or the first operation during the humidifying operation of the humidity control apparatus according to the second embodiment. FIG. 25 is a diagram corresponding to FIG. 16 illustrating the air flow of the first operation during the dehumidifying operation or the first operation during the humidifying operation of the humidity control apparatus according to the second embodiment. FIG. 26 is a diagram corresponding to FIG. 15 illustrating the air flow of the second operation during the dehumidifying operation or the second operation during the humidifying operation of the humidity control apparatus according to the second embodiment. FIG. 27 is a diagram corresponding to FIG. 16 illustrating the air flow of the second operation during the dehumidifying operation or the second operation during the humidifying operation of the humidity control apparatus according to the second embodiment.

    Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 of the Invention
As shown in FIGS. 1 to 3, the humidity control apparatus (110) according to the first embodiment of the present invention is a floor-type humidity control apparatus that is installed on the indoor floor surface and controls indoor humidity. The humidity control device (110) is configured to be installable in a storage space of a closet in which clothes and the like are stored, for example.

    The humidity control apparatus (110) includes a casing (111) formed in a vertically long rectangular parallelepiped shape. In addition, the up-down direction and the left-right direction in the following description shall mean each direction seen from the front side of the casing (111) of FIG.

    The casing (111) includes a front cover (112) that covers the front surface of the casing (111) and is detachably attached to the casing (111), and a rear plate (115) is attached to the rear surface side.

    The casing (111) is attached with a top plate (116) at the upper end and a bottom plate (117) at the lower end. The casing (111) is attached with a right side plate (113) at the right end and a left side plate (114) at the left end.

    Four duct connection ports (150 to 153) are formed in the top plate (116). These duct connection ports (150 to 153) are formed adjacent to each other so as to correspond to the four corners of the top plate (116). Specifically, the four duct connection ports (150 to 153) are formed on the outdoor suction port (150) formed on the front left side of the top plate (116) and on the rear right side of the top plate (116). Consists of an indoor air inlet (151), an indoor inlet (152) formed on the front right side of the top plate (116), and an outdoor exhaust port (153) formed on the rear left side of the top plate (116) Has been. In other words, the outdoor suction port (150), the indoor air supply port (151), the indoor suction port (152), and the outdoor exhaust port (153) are formed integrally on the upper surface of the casing (111).

Each duct connection port (150 to 153) is provided with a duct (not shown) through which air can flow. Each duct extends upward toward the ceiling side of the room, and is disposed up to a predetermined space along the back of the ceiling. Through these ducts, the outdoor suction port (150) and the outdoor exhaust port (153) are connected to the outdoor space, and the indoor suction port (152) and the indoor air supply port (151) are connected to the indoor space. The outdoor suction port (150) is connected to the duct via the filter unit (154). The filter unit (154) is provided at the upper part of the outdoor suction port (150) and accommodates the outdoor air filter (156). That is, the outdoor air flowing through the duct flows through the inside of the filter unit (154), passes through the outdoor air filter (156), and is taken into the casing (111) from the outdoor suction port (150). The outdoor suction port (150) forms an opening for introducing outdoor air (OA) into the casing (111), and the indoor suction port (152) transfers the indoor air (RA) to the casing (111). An opening is formed for introduction into the interior. The outdoor exhaust port (153) constitutes an opening for discharging the air in the casing (111) to the outside as exhaust air (EA), and the indoor air supply port (151) is formed in the casing (111). An opening for supplying air into the room as supply air (SA) is formed.

    The front cover (112) is configured to be attachable / detachable to / from the casing (111) so as to cover an open part on the front side of the casing (111). The front cover (112) is provided with an operation switch (not shown) for switching the operation of the humidity control device (110) by a user of the humidity control device (110). Further, an opening for allowing the filter (155, 156) to be taken out / attached and an opening / closing lid capable of opening and closing the opening are provided on the upper portion of the front cover (112). The opening / closing lid is configured to be detachable from the front cover (112).

    The casing (111) has a rectangular parallelepiped space formed therein. Inside the casing (111), an upper partition plate (120) and a lower partition plate (121) are provided vertically. The upper partition plate (120) and the lower partition plate (121) are formed in a rectangular plate material, and are supported in a horizontal posture inside the casing (111).

    A flat rectangular parallelepiped machine room (160) is defined between the lower partition plate (121) and the bottom plate (117). The machine room (160) accommodates a compressor (172), a four-way switching valve (173), a control board (161) and the like connected to a refrigerant circuit (170) described later. The compressor (172) is configured as a vertical type compressor, and is installed on the bottom plate (117) of the casing (111). The compressor (172) has a scroll type or rotary type compression mechanism, for example.

    Further, a drain pan (1102) for storing moisture condensed by the adsorption heat exchangers (175, 176) is provided on the upper surface of the lower partition plate (121). The drain pan (1102) is formed across a first humidity control chamber (127) and a second humidity control chamber (128) which will be described later.

A flat rectangular parallelepiped space is defined between the upper partition plate (120) and the top plate (116). In this space, a vertical partition plate (118) and a horizontal partition plate (119) are provided. The vertical partition plate (118) is formed in a plate shape whose long side extends in the front-rear direction, and the horizontal partition plate (119) is supported by the casing (111) in a vertical posture in which the long side extends in the left-right direction. The vertical partition plate (118) and the horizontal partition plate (119) form a space between the upper partition plate (120) and the top plate (116) in the first chamber (145), the second chamber (146), and the third chamber. It is divided into a chamber (147) and a fourth chamber (148) . The first chamber (145) is formed on the front left side of the casing (111), and the second chamber (146) is formed on the front right side of the casing (111). The third chamber (147) is formed near the rear right side of the casing (111), and the fourth chamber (148) is formed near the rear left side of the casing (111).

    As shown in FIGS. 3 to 7, the vertical partition plate (118) has a first opening (141) slightly rearward of the portion that partitions the first chamber (145) and the second chamber (146). In addition, a fourth opening (144) is formed slightly toward the front of the portion separating the third chamber (147) and the fourth chamber (148). The first opening (141) connects the first chamber (145) and the second chamber (146), and the fourth opening (144) is the third chamber (147) and the fourth chamber (148). It is what connects.

    As shown in FIGS. 3 to 7, the upper partition plate (120) is formed with first, second, seventh and eighth flow ports (131, 132, 137, 138) and second and third openings (142, 143). ing. The first flow port (131) is formed at a portion facing the first chamber (145) in the upper partition plate (120). The second opening (142) is formed on the front side of the portion facing the second chamber (146) in the upper partition plate (120). The second flow port (132) is formed on the rear side of the portion of the upper partition plate (120) that faces the second chamber (146). The seventh flow port (137) is formed on the front side of the portion facing the third chamber (147) in the upper partition plate (120). The third opening (143) is formed on the rear side of the portion facing the third chamber (147) in the upper partition plate (120). The eighth circulation port (138) is formed at a portion facing the fourth chamber (148) in the upper partition plate (120).

    In the first chamber (145), an auxiliary heat exchanger (194) attached by a mounting plate (129) is disposed between the top plate (116) and the upper partition plate (120). The mounting plate (129) is a frame formed in a substantially rectangular rectangular shape straddling the front and rear. The mounting plate (129) is disposed in an oblique posture in the first chamber (145), and an auxiliary heat exchanger (194) is fitted below the mounting plate (129). Further, a pipe communication part (130) for guiding the reheat refrigerant pipe (7) to the downstream side of the air of the auxiliary heat exchanger (194) is formed on the side surface part of the mounting plate (129). The pipe communication part (130) is an opening extending along one side surface part of the mounting plate (129), and constitutes an opening part according to the present invention. The reheat refrigerant pipe (7) is connected to the heat transfer pipe of the auxiliary heat exchanger (194) via the pipe communication portion (130).

The auxiliary heat exchanger (194) preheats outdoor air sucked from the outdoor suction port (150). The auxiliary heat exchanger (194) is constituted by a cross fin type fin-and-tube heat exchanger. The auxiliary heat exchanger (194) includes a copper heat transfer tube and aluminum fins. The auxiliary heat exchanger (194) is fitted in a mounting plate (129) formed in a rectangular frame. That is, the interior of the first chamber (145) is partitioned into an upstream side and a downstream side of air by the auxiliary heat exchanger (194) and the mounting plate (129) .

As shown in FIG. 2, in the first chamber (145), a reheat refrigerant pipe (7), a second motor operated valve (195) are provided on the downstream side of the mounting plate (129) and the auxiliary heat exchanger (194). ), A bypass pipe (197), and a first motor-operated valve (198). The bypass pipe (197) constitutes a bypass passage.

    In the second chamber (146), an outside air passage cover (162) is disposed on the lower side between the top plate (116) and the upper partition plate (120). The outside air passage cover (162) forms a space communicating with both the first opening (141) and the second circulation port (132). The outside air passage cover (162) is provided in the second chamber (146) so as to partition the first opening (141) and the second circulation port (132) from the second opening (142).

    An internal air filter (155) is provided at the second flow port (132) in the second chamber (146). The room air filter (155) is disposed below the indoor suction port (152). The inside air filter (155) is formed in a plate shape or a sheet shape, and is attached so as to cover the second circulation port (132). The inside air filter (155) is configured to be movable forward and backward in the second chamber (146).

    In the third chamber (147), an exhaust passage cover (163) is disposed on the lower side between the top plate (116) and the upper partition plate (120). The exhaust passage cover (163) forms a space communicating with both the fourth opening (144) and the seventh circulation port (137). The exhaust passage cover (163) is provided in the third chamber (147) so as to partition the fourth opening (144) and the seventh circulation port (137) from the third opening (143).

    The third chamber (147) is provided with an air supply fan (157) above the exhaust passage cover (163), and the fourth chamber (148) is provided with an exhaust fan (158). Each of these fans (157, 158) is a centrifugal multi-blade fan (so-called sirocco fan). The air supply fan (157) blows air attracted from the third opening (143) toward the indoor air supply port (151). The exhaust fan (158) exhausts air attracted from the seventh circulation port (137) or the eighth circulation port (138) toward the outdoor exhaust port (153).

A rectangular parallelepiped space is defined between the lower partition plate (121) and the upper partition plate (120). In this space, a front partition plate (123) and a rear partition plate (124) are provided. The front partition plate (123) and the rear partition plate (124) are formed from the lower partition plate (121) to the upper partition plate (120), and the front cover (112) and the rear plate (115 ) of the casing (111). ) In a vertical position parallel to the casing (111). The front partition plate (123) and the rear partition plate (124) partition the space between the lower partition plate (121) and the upper partition plate (120) into three spaces.

    The front partition plate (123) is formed with third and fourth circulation ports (133, 134). The third circulation port (133) is formed on the left side of the lower part of the front partition plate (123) and corresponds to the second adsorption heat exchanger (175). The fourth circulation port (134) is formed on the right side of the lower part of the front partition plate (123), and corresponds to the first adsorption heat exchanger (176).

    The rear partition plate (124) is formed with fifth and sixth flow ports (135, 136). The fifth flow port (135) is formed on the left side of the lower portion of the front partition plate (123). The fifth circulation port (135) corresponds to the second adsorption heat exchanger (175). The sixth circulation port (136) is formed on the lower right side of the lower part of the front partition plate (123). The sixth circulation port (136) corresponds to the first adsorption heat exchanger (176).

    Of the three spaces, the space closer to the front constitutes the first intermediate passage (125). The first intermediate passage (125) is formed between the front partition plate (123) and the front cover (112) of the casing (111). Of the three spaces, the space closer to the rear side constitutes the second intermediate passage (126). The second intermediate passage (126) is formed between the rear partition plate (124) and the back plate (115) of the casing (111).

    The first intermediate passage (125) has an upper end communicating with the second opening (142), and a lower end closed by the lower partition plate (121). The second intermediate passage (126) has an upper end communicating with the third opening (143) and a lower end closed by the lower partition plate (121).

    Of the three spaces, the central space is divided into left and right by a central partition plate (122). Of the left and right spaces, the left space constitutes the first humidity control chamber (127), and the right space constitutes the second humidity control chamber (128). That is, the first humidity control chamber (127) and the second humidity control chamber (128) are formed side by side so as to be adjacent to each other across the central partition plate (122).

    A second adsorption heat exchanger (175) is accommodated in the first humidity control chamber (127), and a first adsorption heat exchanger (176) is accommodated in the second humidity adjustment chamber (128). Each adsorption heat exchanger (175, 176) is arranged in a horizontal posture in each humidity control chamber (127, 128). The second adsorption heat exchanger (175) and the first adsorption heat exchanger (176) are connected in series to a refrigerant circuit (170) described later. That is, the adsorption heat exchangers (175, 176) are arranged on the downstream side of the air of the auxiliary heat exchanger (194).

    Each of the adsorption heat exchangers (175, 176) is constituted by a cross fin type fin-and-tube heat exchanger. As shown in FIG. 8, these adsorption heat exchangers (175, 176) include a copper heat transfer tube (177) and aluminum fins (178). The plurality of fins (178) provided in the adsorption heat exchanger (175, 176) are each formed in a rectangular shape and are arranged at regular intervals. Further, the heat transfer tube (177) has a shape meandering in the arrangement direction of the fins (178). That is, in this heat transfer tube (177), straight tube portions that pass through the fins (178) and U-shaped tube portions that connect adjacent straight tube portions are alternately configured.

    In each of the adsorption heat exchangers (175, 176), an adsorbent is supported on the surface of each fin (178), and the air passing between the fins (178) contacts the adsorbent supported on the fin (178). To do. As this adsorbent, those having a predetermined adsorption / desorption performance with respect to moisture in the air, such as zeolite, silica gel, activated carbon, and an organic polymer material having a hydrophilic functional group, are used.

    As described above, the upper partition plate (120) is formed with the first, second, seventh and eighth flow ports (131, 132, 137, 138) and the first and second openings (141, 142). The first circulation port (131) allows the first chamber (145) and the first humidity control chamber (127) to communicate with each other, and the second circulation port (132) passes through the first opening (141) to perform the second adjustment. The wet chamber (128) and the first chamber (145) are communicated with each other, and the seventh flow port (137) is connected to the second humidity chamber (128) and the fourth chamber (148) through the fourth opening (144). And the eighth circulation port (138) allows the first humidity control chamber (127) and the fourth chamber (148) to communicate with each other. As described above, the first opening (141) connects the first chamber (145) and the second chamber (146), and the fourth opening (144) includes the third chamber (147) and the fourth chamber. (148).

    As shown in FIGS. 3 to 7, the front partition plate (123) is formed with third and fourth flow ports (133, 134). The third circulation port (133) allows the first intermediate passage (125) and the first humidity control chamber (127) to communicate with each other, and the fourth circulation port (134) communicates with the first intermediate passage (125) and the second adjustment passage. It communicates with the wet chamber (128).

    The rear partition plate (124) is formed with fifth and sixth flow ports (135, 136). The fifth flow port (135) communicates the second intermediate passage (126) and the first humidity control chamber (127), and the sixth flow port (136) communicates with the second intermediate passage (126) and the second control passage. It communicates with the wet chamber (128).

    The upper partition plate (120), the front partition plate (123), and the rear partition plate (124) are provided with dampers that allow the corresponding flow ports (131 to 138) to be opened and closed. Specifically, the upper partition plate (120) includes a first damper (D11) that interrupts the first circulation port (131), a second damper (D12) that intermittently connects the second circulation port (132), A seventh damper (D17) for interrupting the seventh circulation port (137) and an eighth damper (D18) for interrupting the eighth circulation port (138) are provided. Further, the front partition plate (123) is provided with a third damper (D13) for connecting / disconnecting the third flow port (133) and a fourth damper (D14) for connecting / disconnecting the fourth flow port (134). . Further, the rear partition plate (124) is provided with a fifth damper (D15) for connecting / disconnecting the fifth circulation port (135) and a sixth damper (D16) for connecting / disconnecting the sixth circulation port (136). ing.

Each damper (D11 to D18) has, for example, two shutters and a motor that rotates each shutter about a horizontal axis. That is, in each of the dampers (D11 to D18), the two shutters are displaced by the rotation of the motor, and the corresponding circulation ports (131 to 138) are switched between the open state and the closed state. These dampers (D11 to D18) constitute an air-side switching unit.

-Configuration of refrigerant circuit-
The refrigerant circuit (170) mounted on the humidity control device (110) will be described with reference to FIG. The refrigerant circuit (170) includes a main circuit (171) and a bypass circuit (196).

    The main circuit (171) includes a second adsorption heat exchanger (175), a first adsorption heat exchanger (176), a compressor (172), a four-way switching valve (173), a bridge circuit (188), an auxiliary heat It is a closed circuit in which the exchanger (194) and the second motor operated valve (195) are connected to each other by the refrigerant pipe (185). The main circuit (171) performs a vapor compression refrigeration cycle by circulating the refrigerant through the refrigerant pipe (185). Of the refrigerant pipe (185), the refrigerant pipe (185) communicating with the auxiliary heat exchanger (194) is configured as a reheat refrigerant pipe (7). The reheat refrigerant pipe (7) is arranged in the first chamber (145) on the downstream side of the air in the auxiliary heat exchanger (194). For this reason, even if the outdoor air is at a low temperature, air preheated by the auxiliary heat exchanger (194) flows around the reheat refrigerant pipe (7).

    The compressor (172) has its discharge side connected to the first port of the four-way switching valve (173) and its suction side connected to the second port of the four-way switching valve (173) via the accumulator (179). Yes. A high-pressure line (186) that connects the discharge side of the compressor (172) and the first port includes a discharge temperature sensor (180) that detects the temperature of the refrigerant on the discharge side of the compressor (172), and a compressor (172 ) Discharge pressure sensor (181) that detects the pressure of the refrigerant on the discharge side, and a high pressure that automatically stops the operation of the compressor (172) when the discharge pressure of the compressor (172) becomes higher than a predetermined pressure A cutoff switch (182) is provided. In addition, a low pressure line (187) connecting the suction side of the compressor (172) and the second port has a thermistor (1101) and a suction temperature sensor for detecting the temperature of the refrigerant on the suction side of the compressor (172) ( 183) and a suction pressure sensor (184) for detecting the pressure of the refrigerant on the suction side of the compressor (172).

    The four-way switching valve (173) includes a first state in which the first port communicates with the fourth port and the second port communicates with the third port, and the first port and the third port. It is possible to switch to the second state in which the port communicates and the second port communicates with the fourth port.

    In addition, the second adsorption heat exchanger (175), the filter (1100), the bridge circuit (188), the auxiliary heat exchanger (194), the second electric valve (195), the strainer (199), The first adsorption heat exchanger (176) is connected in order from the third port to the fourth port of the four-way switching valve (173).

In the bridge circuit (188), the refrigerant circulating in either reversible direction is the same as that of the second motor operated valve (195) depending on the switching state (first state or second state) of the four-way switching valve (173). The flow of the refrigerant is controlled to pass in the direction. The four-way switching valve (173) and the bridge circuit (188) constitute a switching unit on the refrigerant side.

    The bridge circuit (188) is disposed in a liquid line between the second adsorption heat exchanger (175) and the first adsorption heat exchanger (176). The bridge circuit (188) includes first to fourth pipes (189, 190, 191, 192) connected in a bridge shape, and first to fourth check valves (189a, 190a) provided in the pipes (189, 190, 191, 192), respectively. , 191a, 192a) and a one-way passage (9) connecting the outflow side of the first pipe (189) and the third pipe (191) and the inflow side of the second pipe (190) and the fourth pipe (192) It consists of This one-way passage (9) is a refrigerant passage through which the refrigerant condensed in both adsorption heat exchangers (175, 176) flows in one direction out of the refrigerant flowing through the main circuit (171), and is connected to the refrigerant pipe (185). It is a part.

    The inflow side of the first pipe (189) and the outflow side of the second pipe (190) are connected to the first adsorption heat exchanger (176) via the first refrigerant passage (6). On the other hand, the inflow side of the third pipe (191) and the outflow side of the fourth pipe (192) are connected to the second adsorption heat exchanger (175) via the third refrigerant passage (8). The inflow side of the second pipe (190) and the fourth pipe (192) is connected to the outflow side of the auxiliary heat exchanger (194). On the other hand, the outflow sides of the first pipe (189) and the third pipe (191) are connected to the inflow side of the auxiliary heat exchanger (194).

    The auxiliary heat exchanger (194) is for condensing (dissipating heat) the gas-liquid two-phase refrigerant flowing through the refrigerant pipe (185) to supercool it. The refrigerant flowing out from the bridge circuit (188) flows into the auxiliary heat exchanger (194), while outdoor air (OA) taken in from the outdoor suction port (150) passes through the auxiliary heat exchanger (194). That is, the auxiliary heat exchanger (194) is configured to heat the outdoor air passing by the gas-liquid two-phase refrigerant that has flowed out of the adsorption heat exchangers (175, 176).

    The second motor-operated valve (195) constitutes an expansion valve that expands the refrigerant that has flowed out of the auxiliary heat exchanger (194). The second motor operated valve (195) is provided on the downstream side of the refrigerant in the auxiliary heat exchanger (194), and expands and depressurizes the refrigerant that has flowed out of the auxiliary heat exchanger (194).

    The bypass circuit (196) bypasses the auxiliary heat exchanger (194) and the second motor-operated valve (195) through the flow of the refrigerant that has flowed out of the adsorption heat exchangers (175, 176). The bypass circuit (196) is a circuit in which the first motor operated valve (198) is connected by a bypass pipe (197).

    The bypass pipe (197) allows the refrigerant flowing through the one-way passage (9) of the bridge circuit (188) to flow. The bypass pipe (197) is formed in a tubular shape in which the refrigerant circulates, and one end of the bypass pipe (197) is connected to the outflow side of the first pipe (189) and the third pipe (191) of the bridge circuit (188) and the auxiliary heat exchanger ( 194), and the other end is connected between the second pipe (190) and the fourth pipe (192) of the bridge circuit (188) and the second motor-operated valve (195). ing. The bypass pipe (197) is connected to the first motor operated valve (198) in the middle thereof.

    The first motor-operated valve (198) constitutes an expansion valve that expands the refrigerant circulating in the bypass circuit (196). The first motor operated valve (198) is provided in the middle of the bypass pipe (197). And the refrigerant | coolant which flows through a bypass pipe (197) flows in into a 2nd piping (190) and a 4th piping (192), after expanding with a 1st motor operated valve (198).

-Driving action-
The humidity control apparatus (110) of the first embodiment selectively performs “dehumidification ventilation operation” and “humidification ventilation operation”. In “dehumidification ventilation operation” and “humidification ventilation operation”, the humidity of the outdoor air (OA) taken in is adjusted and then supplied to the room as supply air (SA). At the same time, the indoor air (RA) taken in is exhausted (EA ) To discharge outside. Hereinafter, these operations will be described in detail.

<Dehumidification ventilation operation>
In the humidity control apparatus (110) during the dehumidifying ventilation operation, a first operation and a second operation described later are alternately repeated at a predetermined time interval (for example, every 3 minutes).

    When the air supply fan (157) is operated in the humidity control apparatus (110) during the dehumidification / ventilation operation, outdoor air is taken in the casing (111) as the first air from the outdoor suction port (150). Further, when the exhaust fan (158) is operated, room air is taken as second air from the indoor suction port (152) into the casing (111). In normal operation, the second motor-operated valve (195) is set to the closed state, and the first motor-operated valve (198) is used as a control valve.

    First, the first operation of the dehumidifying ventilation operation will be described. As shown in FIGS. 4 and 5, during the first operation, the state of each damper (D11 to D18) is switched, so that the first circulation port (131), the fourth circulation port (134), the first The 5th flow port (135) and the 7th flow port (137) are opened, and the second flow port (132), the third flow port (133), the sixth flow port (136), and the eighth flow port ( 138) is closed.

    In the refrigerant circuit (170) during the first operation, the four-way switching valve (173) is set to the first state as shown by the solid line in FIG. In the refrigerant circuit (170) in this state, the refrigerant circulates to perform a refrigeration cycle. At this time, in the refrigerant circuit (170), the refrigerant discharged from the compressor (172) passes through the first adsorption heat exchanger (176), the bridge circuit (188), the bypass pipe (197), and the first motor operated valve (198). The second adsorption heat exchanger (175) is passed in this order, the first adsorption heat exchanger (176) becomes a condenser, and the second adsorption heat exchanger (175) becomes an evaporator.

    As shown in FIGS. 4, 5, 10, and 11, the air that has passed through the duct and passed through the outdoor air filter (156) flows into the first chamber (145) from the outdoor suction port (150). The outside air filter (156) captures dust contained in the first air. The first air that has flowed into the first chamber (145) flows through the first circulation port (131) and flows into the first humidity control chamber (127). The first air flows through the first humidity control chamber (127) and passes through the second adsorption heat exchanger (175). In the second adsorption heat exchanger (175), moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air dehumidified by the second adsorption heat exchanger (175) flows out from the fifth circulation port (135) to the second intermediate passage (126). The first air flows through the second intermediate passage (126) upward and to the right, flows into the third chamber (147) from the third opening (143), flows through the third chamber (147), and is supplied to the indoor air supply port. It flows out to the duct from (151) and is supplied to the room.

    On the other hand, the second air flowing into the second chamber (146) from the indoor suction port (152) passes through the indoor air filter (155). In the inside air filter (155), dust contained in the second air is captured. The second air that has passed through the inside air filter (155) flows from the second opening (142) to the first intermediate passage (125), and flows into the second humidity control chamber (128) from the fourth circulation port (134). The second air flows through the second humidity control chamber (128) and passes through the first adsorption heat exchanger (176). In the first adsorption heat exchanger (176), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air used for regeneration of the adsorbent of the first adsorption heat exchanger (176) flows into the third chamber (147) from the seventh flow port (137) and passes through the fourth opening (144). And flows into the fourth chamber (148). The second air flows through the fourth chamber (148), flows out from the outdoor exhaust port (153) to the duct, and is discharged to the outside.

    Next, the second operation of the dehumidifying ventilation operation will be described. As shown in FIGS. 6 and 7, during the second operation, the state of each damper (D11 to D18) is switched, so that the second circulation port (132), the third circulation port (133), The 6th flow port (136) and the 8th flow port (138) are opened, and the first flow port (131), the fourth flow port (134), the fifth flow port (135), and the seventh flow port ( 137) is closed.

    In the refrigerant circuit (170) in the second operation, the four-way switching valve (173) is set to the second state as indicated by a broken line in FIG. In the refrigerant circuit (170) in this state, the refrigerant circulates to perform a refrigeration cycle. At this time, in the refrigerant circuit (170), the refrigerant discharged from the compressor (172) flows into the second adsorption heat exchanger (175), the bridge circuit (188), the bypass pipe (197), and the first motor operated valve (198). Then, the first adsorption heat exchanger (176) passes in this order, the second adsorption heat exchanger (175) serves as a condenser, and the first adsorption heat exchanger (176) serves as an evaporator.

    As shown in FIGS. 6, 7, 10, and 11, the air that has passed through the duct and passed through the outdoor air filter (156) flows into the first chamber (145) from the outdoor suction port (150). The outside air filter (156) captures dust contained in the first air. The first air flowing into the first chamber (145) passes through the first opening (141), flows into the second chamber (146), flows through the second circulation port (132), and enters the second humidity control chamber ( 128). The first air flows through the second humidity control chamber (128) and passes through the first adsorption heat exchanger (176). In the first adsorption heat exchanger (176), moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air dehumidified by the first adsorption heat exchanger (176) flows out from the sixth circulation port (136) to the second intermediate passage (126). The first air flows upward through the second intermediate passage (126), flows into the third chamber (147), flows through the third chamber (147), and flows out from the indoor air supply port (151) to the duct. Supplied indoors.

    On the other hand, the second air flowing into the second chamber (146) from the indoor suction port (152) passes through the indoor air filter (155). In the inside air filter (155), dust contained in the second air is captured. The second air that has passed through the inside air filter (155) flows from the second opening (142) to the first intermediate passage (125), and flows into the first humidity control chamber (127) from the third circulation port (133). The second air flows through the first humidity control chamber (127) and passes through the second adsorption heat exchanger (175). In the second adsorption heat exchanger (175), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air used for regeneration of the adsorbent in the second adsorption heat exchanger (175) flows into the fourth chamber (148) from the eighth flow port (138). The second air flows through the fourth chamber (148), flows out from the outdoor exhaust port (153) to the duct, and is discharged to the outside.

<Humidified ventilation operation>
In the humidity control apparatus (110) during the humidification ventilation operation, a first operation and a second operation described later are alternately repeated at a predetermined time interval (for example, every 3 minutes).

    When the air supply fan (157) is operated in the humidity control apparatus (110) during the humidification ventilation operation, the outdoor air is taken as the first air from the outdoor suction port (150) into the casing (111). Further, when the exhaust fan (158) is operated, room air is taken as second air from the indoor suction port (152) into the casing (111). In normal operation, the second motor-operated valve (195) is used as a control valve, and the first motor-operated valve (198) is set in a closed state.

    First, the 1st operation | movement of humidification ventilation operation is demonstrated. As shown in FIGS. 4 and 5, during the first operation, the state of each damper (D11 to D18) is switched, so that the first circulation port (131), the fourth circulation port (134), the first The 5th flow port (135) and the 7th flow port (137) are opened, and the second flow port (132), the third flow port (133), the sixth flow port (136), and the eighth flow port ( 138) is closed. In the refrigerant circuit (170) during the first operation, the second adsorption heat exchanger (175) serves as a condenser, and the first adsorption heat exchanger (176) serves as an evaporator.

    As shown in FIGS. 4, 5, 10, and 11, the air that has passed through the duct and passed through the outside air filter (156) flows into the first chamber (145) from the outdoor suction port (150). The first air that has flowed into the first chamber (145) flows through the first circulation port (131) and flows into the first humidity control chamber (127). The first air flows through the first humidity control chamber (127) and passes through the second adsorption heat exchanger (175). In the second adsorption heat exchanger (175), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the first air. The first air humidified by the second adsorption heat exchanger (175) flows out from the fifth circulation port (135) to the second intermediate passage (126). The first air flows through the second intermediate passage (126) upward and to the right, flows into the third chamber (147) from the third opening (143), flows through the third chamber (147), and is supplied to the indoor air supply port. It flows out to the duct from (151) and is supplied to the room.

    On the other hand, the second air flowing into the second chamber (146) from the indoor suction port (152) passes through the inside air filter (155) and flows from the second opening (142) to the first intermediate passage (125). Then, it flows into the second humidity control chamber (128) from the fourth circulation port (134). The second air flows through the second humidity control chamber (128) and passes through the first adsorption heat exchanger (176). In the first adsorption heat exchanger (176), moisture in the second air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The second air dehumidified by the first adsorption heat exchanger (176) flows into the third chamber (147) from the seventh circulation port (137), passes through the fourth opening (144), and enters the fourth chamber. (148) flows into. The second air flows through the fourth chamber (148), flows out from the outdoor exhaust port (153) to the duct, and is discharged to the outside.

    Next, the second operation of the humidification ventilation operation will be described. As shown in FIGS. 6 and 7, during the second operation, the state of each damper (D11 to D18) is switched, so that the second circulation port (132), the third circulation port (133), The 6th flow port (136) and the 8th flow port (138) are opened, and the first flow port (131), the fourth flow port (134), the fifth flow port (135), and the seventh flow port ( 137) is closed. In the refrigerant circuit (170) during the second operation, the second adsorption heat exchanger (175) serves as an evaporator and the first adsorption heat exchanger (176) serves as a condenser.

    As shown in FIGS. 6, 7, 10, and 11, the air that has passed through the duct and passed through the outdoor air filter (156) flows into the first chamber (145) from the outdoor suction port (150). The first air flowing into the first chamber (145) passes through the first opening (141), flows into the second chamber (146), flows through the second circulation port (132), and enters the second humidity control chamber ( 128). The first air flows through the second humidity control chamber (128) and passes through the first adsorption heat exchanger (176). In the first adsorption heat exchanger (176), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the first air. The first air humidified by the first adsorption heat exchanger (176) flows out from the sixth circulation port (136) to the second intermediate passage (126). The first air flows upward through the first intermediate passage (125) and flows into the third chamber (147), flows through the third chamber (147), and flows out from the indoor air supply port (151) to the duct. Supplied indoors.

    On the other hand, the second air flowing into the second chamber (146) from the indoor suction port (152) passes through the inside air filter (155) and flows from the second opening (142) to the first intermediate passage (125). Then, it flows into the first humidity control chamber (127) from the third circulation port (133). The second air flows through the first humidity control chamber (127) and passes through the second adsorption heat exchanger (175). In the second adsorption heat exchanger (175), moisture in the second air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is adsorbed by the refrigerant. The second air dehumidified by the second adsorption heat exchanger (175) flows into the fourth chamber (148) through the eighth circulation port (138). The second air flows through the fourth chamber (148), flows out from the outdoor exhaust port (153) to the duct, and is discharged to the outside.

<Operation in winter or when outdoor temperature is low>
Next, dehumidification ventilation operation or humidification ventilation operation in winter or when the outdoor temperature becomes low will be described. In an environment where the outside air temperature is low in winter (for example, below 5 ° C.), the second motor-operated valve (195) is set to an open state and the first motor-operated valve (198) is set to a closed state by a controller or the like.

    First, the refrigerant circuit (170) in the first state will be described as shown by the solid line in FIG. In the refrigerant circuit (170) in this state, the refrigerant circulates to perform a refrigeration cycle. At this time, in the refrigerant circuit (170), the refrigerant discharged from the compressor (172) flows into the first adsorption heat exchanger (176), and heat exchange is performed with ambient air. Then, the refrigerant that has flowed out of the first adsorption heat exchanger (176) flows into the auxiliary heat exchanger (194) through the bridge circuit (188). In the auxiliary heat exchanger (194), the air sucked into the first chamber (145) from the outdoor suction port (150) and the gas-liquid two-phase refrigerant flowing out of the first adsorption heat exchanger (176) Heat exchange takes place between them. And the outdoor air taken in in the 1st chamber (145) is heated. The refrigerant that has flowed out of the auxiliary heat exchanger (194) passes through the second motor-operated valve (195), the bridge circuit (188), and the second adsorption heat exchanger (175) in this order, and the second adsorption heat exchanger (175). Evaporates in

    Next, the refrigerant circuit (170) in the second state will be described as indicated by a broken line in FIG. In the refrigerant circuit (170) in this state, the refrigerant circulates to perform a refrigeration cycle. At this time, in the refrigerant circuit (170), the refrigerant discharged from the compressor (172) flows into the second adsorption heat exchanger (175), and heat exchange is performed with ambient air. Then, the refrigerant that has flowed out of the first adsorption heat exchanger (176) flows into the auxiliary heat exchanger (194) through the bridge circuit (188). In the auxiliary heat exchanger (194), the air sucked into the first chamber (145) from the outdoor suction port (150) and the gas-liquid two-phase refrigerant flowing out of the first adsorption heat exchanger (176) Heat exchange takes place between them. And the outdoor air taken in in the 1st chamber (145) is heated. The refrigerant that has flowed out of the auxiliary heat exchanger (194) passes through the second motor-operated valve (195), the bridge circuit (188), and the first adsorption heat exchanger (176) in this order, and the first adsorption heat exchanger (176). Evaporates in

-Effect of Embodiment 1-
According to the first embodiment, since the reheat refrigerant pipe (7) is disposed on the downstream side of the air in the auxiliary heat exchanger (194), the temperature of the air flowing around the reheat refrigerant pipe (7) can be increased. For this reason, the amount of heat radiation to the air around the reheat refrigerant pipe (7) can be suppressed. Thereby, the fall of the refrigerant | coolant temperature which flows in into an auxiliary | assistant heat exchanger (194) from refrigerant | coolant piping (185) can be suppressed. As a result, in the humidity control apparatus including the auxiliary heat exchanger (194) that preheats the outdoor air to be taken in, it is possible to suppress a decrease in the preheating performance in the auxiliary heat exchanger (194).

    In addition, since the refrigerant condensed in each adsorption heat exchanger (175,176) is allowed to flow into the auxiliary heat exchanger (194), the air taken in from the outdoor suction port (150) by the condensed gas-liquid refrigerant Can be heated, and the sensible heat capacity can also be improved.

    Further, since the auxiliary heat exchanger (194) is attached to the lower side of the mounting plate (129) and the opening (130) is provided in the mounting plate (129), the refrigerant pipe (185) connected to the auxiliary heat exchanger (194) is provided. ) Can be located downstream of the air in the auxiliary heat exchanger (194).

    Finally, since the bypass circuit (196) for bypassing the auxiliary heat exchanger (194) by the refrigerant flowing through the refrigerant circuit (170) is provided, the outdoor heat inlet (194) for the outdoor suction port when the outdoor temperature is high, for example. It is possible to prevent the air sucked from (150) from being heated.

    Further, according to the first embodiment, the auxiliary heat exchanger (always) regardless of which of the refrigerant flows related to the refrigerant circuit (170) is switched by the four-way switching valve (173) and the bridge circuit (188). 194) becomes a radiator, and after the outdoor air having a low temperature is heated by the auxiliary heat exchanger (194), it can be introduced into the adsorption heat exchanger (176, 175). As a result, problems such as freezing of the drain water of the adsorption heat exchanger (176, 175) are eliminated, and the humidity control apparatus can be operated well even when the outdoor air is at a low temperature.

    Further, according to the first embodiment, by providing the refrigerant circuit (170) with the bypass pipe (197), at least a part of the refrigerant going to the auxiliary heat exchanger (194) is passed through the bypass pipe (197). Can be bypassed. Thereby, for example, when the temperature of outdoor air is high, it is possible to prevent the outdoor air from being heated unnecessarily.

    Further, according to the first embodiment, the first motor-operated valve and the second motor-operated valve (198, 195) are configured so that the refrigerant expansion operation related to the refrigeration cycle and the refrigerant bypass amount related to the auxiliary heat exchanger (194) are performed. It also serves as both adjustment operation. Accordingly, there is no need to provide two valves for the refrigerant expansion operation and the bypass amount adjustment operation, the number of components of the humidity control device is reduced, and the cost of the humidity control device can be reduced. .

    Further, according to the first embodiment, the first motor-operated valve (198) is fully closed and the second motor-operated valve (195) is appropriately adjusted (for example, the degree of superheat of the refrigerant sucked into the compressor (172)) The refrigerant circuit (170) heats the outdoor air with the auxiliary heat exchanger (194) while performing the refrigeration cycle.

    Further, the second motor-operated valve (195) is fully closed and the first motor-operated valve (198) is appropriately adjusted, so that the outdoor heat is not heated by the auxiliary heat exchanger (194), and the refrigerant circuit (170 ) Can be subjected to a refrigeration cycle. At this time, if the second motor-operated valve (195) is fully closed, refrigerant may accumulate in the auxiliary heat exchanger (194). In this case, the second motor-operated valve (195) is slightly opened, so that the refrigerant flows slightly through the auxiliary heat exchanger (194), and the refrigerant flows into the auxiliary heat exchanger (35, 194). It is possible to prevent accumulation.

    In addition, according to the first embodiment, the check valve bridge circuit (in comparison with the case where the bypass pipe (197) connects the first refrigerant passage (6) and the third refrigerant passage (8)). The amount of refrigerant that accumulates can be reduced by the amount that 188) is not bypassed. Thereby, at the time of the bypass operation in which the refrigerant passes through the bypass pipe (197), the refrigerant shortage due to the accumulation of the refrigerant is less likely to occur, and the bypass operation can be performed stably.

<< Embodiment 2 of the Invention >>
The humidity control apparatus (10) according to the second embodiment of the present invention is a floor-standing humidity control apparatus that is installed on the floor surface of the room and adjusts the humidity of the room. The humidity control apparatus (10) is installed, for example, in a storage space of a closet in which clothes and the like are stored.

  The configuration of the humidity control apparatus (10) will be described with reference to the drawings. In addition, in the following description, the description indicating the directions of “up”, “down”, “right”, “left”, “front”, and “rear” is, as a general rule, the humidity control device (10) shown in FIG. It is based on the case. 15 and 16 schematically show the humidity control device (10). FIG. 15 (A) shows the upper surface of the humidity control device (10), and FIG. 15 (B) shows the humidity control device. FIG. 15C shows the internal structure on the left side of the humidity control apparatus (10), and FIG. 15D shows the internal structure on the right side of the humidity control apparatus. 16A shows the internal structure of the humidity control apparatus of FIG. 15A as viewed from the YY section, and FIG. 16B shows the humidity control apparatus of FIG. The internal structure is viewed from the ZZ cross section.

<Case structure>
As shown in FIG. 13, the humidity control apparatus (10) includes a vertically long rectangular parallelepiped box-shaped casing (11). The casing (11) includes a rectangular plate-like bottom plate (12) and a top plate (13), and four rectangular plate-like panels (14, 14) corresponding to the four sides of the bottom plate (12) and the top plate (13). 15,16,17). These panels (14,15,16,17) consist of a front panel (14) on the front side, a rear panel (15) on the rear side, a right side panel (16) on the right side, and a left side panel on the left side ( 17). In the casing (11), the bottom plate (12), the top plate (13), the rear panel (15), the right side panel (16), and the left side panel (17) have a casing body (11a ). The front panel (14) is configured to be detachable from the casing body (11a) via a fastening member such as a screw. The casing (11) has a rear panel (15) installed in the vicinity of the indoor wall.

  The front panel (14) includes a lower panel (14a) that covers the lower space (S1) of the casing (11), an upper panel (14b) that covers the upper space (S3) of the casing (11), and a casing (11) And an intermediate panel (14c) covering the intermediate space (S2). Further, a filter maintenance panel (14d) is provided at the lower left corner of the lower panel (14a). In the front panel (14), these panels (14a, 14b, 14c, 14d) are configured to be individually removable.

  Four duct connection ports (18) are attached to the top plate (13). Specifically, the top plate (13) has an air supply connection port (18a) on the front right side, an exhaust connection port (18b) on the rear right side, and an outside air connection port (18c) on the rear left side. The inside air connection port (18d) is provided on the front left side. The air supply connection port (18a) and the indoor air connection port (18d) communicate with the indoor space via the duct, respectively, and the exhaust connection port (18b) and the outdoor air connection port (18c) communicate with the outdoor space via the duct, respectively. Communicate. That is, in the humidity control apparatus (10), the air supply connection port (18a) and the indoor air connection port (18d) connected to the indoor space are arranged in a concentrated manner on the front side of the casing (11), and are connected to the outdoor space. (18b) and the outside air connection port (18c) are collectively arranged on the rear side of the casing (11). Outdoor air (OA) is sucked into the outdoor air connection port (18c), and indoor air (RA) is sucked into the indoor air connection port (18d). Supply air (SA) is blown into the room from the air supply connection port (18a), and exhaust air (EA) is blown out of the room through the exhaust connection port (18b).

<Frame structure>
As shown in FIG. 14, four vertical frames (support members) (21) corresponding to the four corners of the bottom plate (12) are provided inside the casing (11). These vertical frames (21) include a first vertical frame (21a) on the front right side, a second vertical frame (21b) on the rear right side, a third vertical frame (21c) on the rear left side, and a left side on the front side. It is composed of a fourth vertical frame (21d). Each vertical frame (21) extends vertically to a position slightly above the middle portion in the height direction of the casing (11). That is, in the casing (11), there is no vertical frame directly connected to the bottom plate (12) between the top plate (13) and the upper end of each vertical frame (21).

  Four horizontal frames (22) (beam members) extending in the horizontal direction are bridged on top of each vertical frame (21). These horizontal frames (22) include a first horizontal frame (22a) between a first vertical frame (21a) and a second vertical frame (21b), a second vertical frame (21b), and a third vertical frame ( 21c), a second horizontal frame (22b), a third vertical frame (21c), a third horizontal frame (22c) between the fourth vertical frame (21d), and a fourth vertical frame (21d). And a fourth horizontal frame (22d) between the first vertical frame (21a). The second, third, and fourth horizontal frames (22b, 22c, 22d) are connected to the upper ends of the corresponding vertical frames (21). On the other hand, the first horizontal frame (22a) is connected to a portion slightly lower than the upper ends of the first and second vertical frames (21a, 21b).

  Three intermediate frames (23) extending horizontally are provided on the lower side of the horizontal frame (22). The intermediate frame (23) includes a first intermediate frame (23a) formed below the first horizontal frame (22a) and a second intermediate frame formed below the second horizontal frame (22b). (23b) and a third intermediate frame (23c) formed below the third horizontal frame (22c).

  The vertical frame (21), the horizontal frame (22), and the intermediate frame (23) are heavy components that are relatively heavy among the components of the humidity control device (10). ) And the adsorption heat exchanger (33)) act to constitute a support member that supports them.

<Inside space of casing>
As shown in FIG. 14, the inside of the casing (11) includes a lower space (S1) formed on the back side of the lower panel (14a) and an intermediate space (S2) formed on the back side of the intermediate panel (14c). ) And the upper space (S3) formed on the back side of the upper panel (14b).

<Components in the lower space>
As shown in FIGS. 17 and 18, a lower partition member (41) is installed in the lower space (S1) along the left side panel (17). The lower partition member (41) is made of a resin material such as polystyrene, and is formed in a frame shape in which the upper side and the lower side are opened. The lower partition member (41) includes a lower partition (41a) that divides the lower space (S1) left and right, and a small-diameter cylindrical portion having a substantially rectangular cross section disposed adjacent to the third vertical frame (21c). 41b) and a large-diameter cylindrical portion (41c) having a substantially rectangular cross section disposed adjacent to the fourth vertical frame (21d). An outside air inflow path (61) is defined inside the small diameter cylindrical portion (41b). A reheat chamber (63) is defined inside the large diameter cylindrical portion (41c). The outside air inflow channel (61) and the reheat chamber (63) communicate with each other through the communication port (62) (see FIG. 18).

  The reheat chamber (63) is provided with an upper support plate (41d) formed integrally with the lower partition member (41). The upper support plate (41d) is continuous with the left inner wall of the large-diameter cylindrical portion (41c) and is supported in a horizontal state so as to be parallel to the bottom plate (12). In the reheat chamber (63), a lower outside air flow path (63a) continuous to the communication port (62) is formed below the upper support plate (41d), and a lower outside air flow path (upper side of the upper support plate (41d) ( An upper outside air flow path (63b) continuing to 63a) is formed (see FIGS. 15B and 18). That is, in the reheat chamber (63), the vertical cross section of the air from the inflow side of the lower outside air flow path (63a) to the outflow side of the upper outside air flow path (63b) is substantially U-shaped (U-shaped). A flow path is formed.

  As shown in FIG. 18 and the like, the lower outside air flow path (63a) is provided with an insect filter (26), a pleat filter (27), and a reheat unit (28) in order from the upstream side to the downstream side. It is done.

  The insect filter (26) is a net-like member that captures insects and relatively large dust in the outdoor air. The pleated filter (27) is an air cleaning filter having finer eyes than the insect filter (26), and traps relatively small dust in the outdoor air. The lower partition member (41) is provided with a maintenance lid (41e) on the back side of the filter maintenance panel (14d) described above (see FIG. 17). The maintenance lid (41e) is configured to freely open and close the maintenance ports of the insect removing filter (26) and the pleat filter (27). That is, when the filter maintenance panel (14d) is removed and then the maintenance lid (41e) is opened, the front ends of the insect filter (26) and the pleat filter (27) are exposed to the outside of the casing body (11a).

  The reheat unit (28) has a frame (29) and a reheat heat exchanger (35) fixed inside the frame (29). The frame (29) includes a pair of side stays (29a) and a frame body (29b) that is sandwiched between the pair of side stays (29a) so that the inner wall faces obliquely downward. The frame body (29b) has an obliquely inclined opening surface (29c), and the reheat heat exchanger (35) is held along the opening surface (29c). A reheat heat exchanger (35) comprises the heating heat exchanger which heats outdoor air with a refrigerant | coolant.

  As shown in FIG. 17, in the lower space (S1), the machine room (60) is partitioned in a substantially half on the right side (outside of the lower partition member (41)). In the machine room (60), an electrical component box (90) is installed on the back side of the front panel (14). The electrical component box (90) accommodates electrical components such as a printed circuit board for a power supply circuit of a motor of the compressor (31) and a reactor electrically connected to the circuit on the printed circuit board. In the machine room (60), a compressor (31) and a four-way selector valve (32) are installed on the back side of the electrical component box (90). That is, when the lower panel (14a) of the front panel (14) is removed, the electrical component box (90) is exposed to the outside of the casing body (11a). Further, when the electrical component box (90) is taken out, the compressor (31) and the four-way selector valve (32) are exposed to the outside of the casing body (11a).

<Intermediate space>
In the intermediate space (S2), a first intermediate partition member (43), a second intermediate partition member (44), and a third intermediate partition member (47) are provided in order from the lower side to the upper side. These intermediate partition members (43, 44, 47) are all resin members such as polystyrene molded integrally.

  As shown in FIG. 19, the 1st intermediate | middle division member (43) has obstruct | occluded the upper side open part of the machine room (60). On the upper surface of the first intermediate partition member (43), a frame portion (43a) protruding in a rectangular shape and a pair of concave grooves (43c, 43c) formed on the left and right outer sides of the frame portion (43a) And are formed. The frame portion (43a) is formed across the first intermediate partition member (43). A water receiving portion (43b) for receiving condensed water generated in the humidity control chamber (66a, 66b) is formed inside the frame portion (43a). The water receiving portion (43b) is formed across the first intermediate partition member (43). The bottom surface of the water receiving portion (43b) is inclined so as to face slightly upward from the horizontal plane. That is, the water accumulated in the water receiving portion (43b) is guided forward along the inclined bottom surface. The concave grooves (43c, 43c) extend in the front-rear direction along the left and right side walls of the frame portion (43a).

  As shown in FIG. 20, the second intermediate partition member (44) is supported by the first intermediate frame (23a) and the second intermediate frame (23b) while being predetermined on the upper side of the first intermediate partition member (43). Are arranged at intervals. In the second intermediate partition member (44), concave grooves (44a, 44a) extending in the front-rear direction are formed at positions corresponding to the concave grooves (43c, 43c) of the first intermediate partition member (43).

  On the other hand, as shown in FIG. 19, between the first intermediate partition member (43) and the second intermediate partition member (44), there are two lower damper partition plates (45) and one horizontal partition. A plate (46) is formed. The two lower damper partition plates (45) and the one horizontal partition plate (46) are arranged vertically so that the plate thickness directions thereof are horizontal. The two lower damper partition plates (45) are composed of an outside air damper partition plate (45a) and an exhaust damper partition plate (45b).

  The lower part of the outside air damper partition plate (45a) is fitted into the left groove (43c) of the first intermediate partition member (43), and the upper end of the outside air damper partition plate (45a) is the left groove of the second intermediate partition member (44). (44a). The lower end of the exhaust damper partition member (45b) is fitted into the right groove (43c) of the first intermediate partition member (43), and the upper end of the exhaust damper partition member (45b) is the left groove of the second intermediate partition member (44). (44a). The front end of the lower damper partition (45) is located on the back side of the front panel (14). That is, when the front panel (14) is removed, the front end of the lower damper partition (45) is exposed to the outside of the casing body (11a). In a state where the front panel (14) is removed, the lower damper partition plate (45) can be pulled back and forth along the respective concave grooves (43c, 44a).

As shown in FIGS. 15, 19, and 20, an intermediate outside air flow path (64) communicating with the reheat chamber (63) is formed on the left side of the outside air damper partition plate (45 a) so as to extend back and forth. The outside air damper partition plate (45a) is provided with a first damper (D1) on the front side and a second damper (D2) on the rear side. On the right side of the exhaust damper partition plate (45b), an intermediate exhaust passage (65) is formed extending forward and backward. The exhaust damper partition plate (45b) is provided with a third damper (D3) on the front side and a fourth damper (D4) on the rear side. These dampers (D1 to D4) constitute an air-side switching unit.

  As shown in FIGS. 19 and 21, the space between the outside air damper partition plate (45a) and the exhaust damper partition plate (45b) is divided into two humidity control chambers (66) in the front and rear directions by the horizontal partition plate (46). It has been. In these humidity control chambers (66), the front space forms a first humidity control chamber (66a), and the rear space forms a second humidity control chamber (66b). The first humidity control chamber (66a) is formed at a position corresponding to the first damper (D1) and the third damper (D3), and the second humidity control chamber (66b) is the second damper (D2) and the fourth damper. It is formed at a position corresponding to the damper (D4). The first humidity control chamber (66a) and the second humidity control chamber (66b) are formed over the inside of the second intermediate partition member (44).

  As shown in FIG. 21, the two adsorption heat exchangers (33) are divided into a first adsorption heat exchanger (33a) housed in the first humidity control chamber (66a) and a second humidity control chamber (66b). It is comprised with the 2nd adsorption heat exchanger (33b) accommodated. The adsorption heat exchanger (33) is configured such that an adsorbent is supported on the surface of a cross fin type fin-and-tube heat exchanger body (34).

  The heat exchanger body (34) of the adsorption heat exchanger (33) includes a copper heat transfer tube (34a) and a number of aluminum fins (34b). The heat transfer tube (34a) has a straight tube portion and a U-shaped portion formed alternately and continuously in a meandering shape. The fin (34b) is formed in a vertically long plate shape, and the straight pipe portion of the heat transfer tube (34a) penetrates in the thickness direction. That is, a large number of fins (34b) are arranged in parallel along the axial direction of the straight tube portion of the heat transfer tube (34a).

The adsorbent is supported on the surfaces of a large number of fins (34b) and heat transfer tubes (34a) . The interface between the adsorbents and air, or moisture in the air is adsorbed into the adsorbent, or adsorbed water desorbed to (adsorbent is regenerated) into the air. As the adsorbent, zeolite, silica gel, activated carbon, an organic polymer material having a hydrophilic functional group, or the like is used. Moreover, as an adsorbent, you may use the material (what is called a sorbent) which has the function not only to adsorb | suck moisture but to absorb moisture.

  The adsorption heat exchanger (33) is held in the storage chamber (67) so that the short sides of the fins (34b) are vertical and the U-shaped portions of the heat transfer tubes (34a) are located on the left and right sides.

  As shown in FIG. 20, the third intermediate partition member (47) is laminated on the upper side of the second intermediate partition member (44). A pair of wide grooves (47a, 47a) wide on the left and right are formed on the upper surface of the third intermediate partition member (47). A pair of upper damper partition plates (48) are fitted in the thickness direction in these wide grooves (47a). These upper damper partition plates (48) are arranged horizontally so that their thickness directions are vertical. The front end portion of the upper damper partition plate (48) is located on the back side of the front panel (14). That is, when the front panel (14) is removed, the front end portion of the upper damper partition (48) is exposed to the outside of the casing body (11a). When the front panel (14) is removed, the upper damper partition plate (48) can be pulled back and forth along the wide grooves (47a).

The pair of upper damper partition plates (48) includes a left-side internal air damper partition plate (48a) and a right-side air supply damper partition plate (48b). The inside air damper partition plate (48a) is provided with a fifth damper (D5) on the front side and a sixth damper (D6) on the rear side. The supply damper partition plate (48b) is provided with a seventh damper (D7) on the front side and an eighth damper (D8) on the rear side. The fifth damper (D5) and the seventh damper (D7) are formed at positions corresponding to the first humidity control chamber (66a), and the sixth damper (D6) and the eighth damper (D8) are the second humidity control chamber. It is formed at a position corresponding to the chamber (66b). These dampers (D5 to D8) constitute an air-side switching unit.

  At the corners on the right rear side of the second intermediate partition member (44) and the third intermediate partition member (47), laterally long through holes extending in the front-rear direction are formed, and these through holes are continuously connected to the exhaust communication flow. Constructs a road (68).

  An outside air duct portion (53) of the first upper partition member (51) extends vertically at the left rear corner of the intermediate space (S2) (see FIGS. 20 and 22). The lower end of the outside air duct part (53) is continuous with the large-diameter cylindrical part (41c) of the lower partition member (41). In the intermediate space (S2), a spacer member (24) is provided on the front side of the first humidity control chamber (66a). The spacer member (24) is interposed between the first intermediate partition member (43) and the first intermediate frame (23a) so as to ensure a predetermined interval.

<Upper space>
As shown in FIG. 22, the upper space (S3) is provided with a first upper partition member (51), a second upper partition member (54), and a third upper partition member (80). These partition members (51, 54, 80) are all polystyrene resin materials molded integrally. In the upper space (S3), the four upper chambers (19) are partitioned by these partition members (51, 54, 80). These upper chambers (19) consist of a front right-side indoor air supply chamber (19a), a rear right-side outdoor exhaust chamber (19b), a rear left-side outdoor air suction chamber (19c), and a front left-side indoor air suction Chamber (19d). The indoor air supply chamber (19a) communicates with the air supply connection port (18a), the outdoor exhaust chamber (19b) communicates with the exhaust connection port (18b), and the outdoor air suction chamber (19c) communicates with the external air connection port (18c). The room air suction chamber (19d) communicates with the room air connection port (18d). An air supply fan unit (84) is provided in the indoor air supply chamber (19a), and an exhaust fan unit (87) is provided in the outdoor exhaust chamber (19b).

  The first upper partition member (51) is provided on the left side of the upper space (S3). The first upper partition member (51) extends along the left side wall (52) formed across the front and rear ends of the casing (11) along the left side panel (17), and along the third vertical frame (21c). A cylindrical outside air duct portion (53) extending vertically. The outside air duct part (53) is arranged in the upper space (S3) and continues from the lower end of the large diameter duct part (53a) and the large diameter duct part (53a) that divides the outside air suction chamber (19c) inside. And a small-diameter duct portion (53b) that is disposed in the intermediate space (S2) and has a smaller diameter than the large-diameter duct portion (53a).

In the upper space (S3), an outside air suction chamber (19c) is formed inside the large diameter duct portion (53a), and an inside air suction chamber (19d) is formed outside the large diameter duct portion (53a). In the upper space (S3), the upper inside air flow path (69) is partitioned from the outer lower side of the large diameter duct portion (53a) to the front panel (14). The upper end of the upper inside air channel (69) communicates with the inside air suction chamber (19d). Further, the fifth damper (D5) and the sixth damper (D6) of the internal air damper partition plate (48a) face the upper internal air flow path (69). A duct internal flow path (71) connected to the outside air inflow path (61) is formed inside the small diameter duct portion (53b) (see FIG. 15B).

  The second upper partition member (54) includes a right side wall portion (55) formed across the front and rear ends of the casing (11) along the right side panel (16) of the casing (11), and an upper space (S3). And a rear side wall portion (57) continuous to each rear end portion of the right side wall portion (55) and the central partition portion (56).

  A pedestal (55a) is formed inside the right side wall (55). The pedestal portion (55a) has a longitudinal section formed in an L shape, and extends back and forth from the rear side wall portion (57) to the front panel (14) side. A first installation surface (55c) on which the fan units (84, 87) and the third upper partition member (80) are installed so as to be able to be guided back and forth is formed on the upper end surface of the pedestal portion (55a).

  A columnar first contact portion (55b) extending in the vertical direction is formed at an intermediate portion in the front-rear direction of the right side wall portion (55). The rear end portion of the third upper partition member (80) contacts the front end of the first contact portion (55b). Further, a sealing material (not shown) is formed on the contact surface with respect to the third upper partition member (80) in the first contact portion (55b).

  The central partition (56) includes a vertical first vertical wall (56a), a horizontal wall (56b) bent horizontally from the lower end of the first vertical wall (56a), and a vertical from the right end of the horizontal wall (56b). And a bent second vertical wall (56c). A second installation surface (56d) on which the fan units (84, 87) and the third upper partition member (80) are installed so as to be guided back and forth is formed on the upper end surface of the central partition (56). .

  The central partition (56) divides the outside air suction chamber (19c) and the inside air suction chamber (19d) arranged in the front-rear direction from the outside exhaust chamber (19b) and the indoor air supply chamber (19a) arranged in the front-rear direction. In addition, a main partition extending in the front and rear direction of the casing (11) is formed. Since the central partition (56) is formed integrally with the right side wall (55) and the rear side wall (57) along the casing (11), the central partition (56) is independent of other members. You can't just remove it.

  A columnar second abutting portion (56e) extending vertically is formed at an intermediate portion in the front-rear direction of the central partition portion (56). The rear end portion of the third upper partition member (80) contacts the front end of the second contact portion (56e). Further, a sealing material (not shown) is formed on the contact surface with respect to the third upper partition member (80) at the second contact portion (56e).

  In the second upper partition member (54), a corner between the right side wall (55) and the rear side wall (57) and a corner between the central partition (56) and the rear side wall (57). In addition, an insertion part (58) is formed respectively. Reinforcing ribs (75) are inserted through the respective insertion portions (58). The upper end of each reinforcing rib (75) is fixed to the top plate (13) of the casing (11). These reinforcing ribs (75) constitute an attachment member to which the exhaust fan unit (87) is fixed and supported.

The second upper partition member (54) is integrally formed with a horizontal partition portion (59) below the exhaust fan unit (87) (see FIGS. 16A and 17). In the upper space (S3), an outdoor exhaust chamber (19b) is defined on the upper side of the horizontal partition (59), and an upper air supply channel (from the lower side of the horizontal partition (59) to the front panel (14) ( 70) is sectioned. The outdoor exhaust chamber (19b) communicates with the exhaust communication channel (68) shown in FIG. The upper end of the upper air supply channel (70) communicates with the indoor air supply chamber (19a). Further, the seventh damper (D7) and the eighth damper (D8) of the supply damper partition plate (48b) face the upper supply passage (70).

  As shown in FIG. 17, a columnar third contact portion (59a) extending left and right is formed on the upper surface of the front edge of the horizontal partition portion (59). The rear end portion of the third upper partition member (80) contacts the front end of the third contact portion (59a). Further, a seal material (not shown) is formed on the third contact portion (59a) on the contact surface with respect to the third upper partition member (80).

  As shown in FIG. 22, the third upper partition member (80) includes a first side plate portion (81) formed along the right side wall portion (55) of the second upper partition member (54), and a second upper portion. A second side plate (82) formed along the central partition (56) of the partition member (54), a rear end of the first side plate (81), and a rear end of the second side plate (82) And an intermediate side plate portion (83) formed over the entire area. That is, the cross-sectional shape of the third upper partition member (80) is formed in a substantially U-shape (U-shape) having an open portion on the front side.

  In the third upper partition member (80), the lower ends of the side plate portions (81, 82) are respectively installed on the installation surfaces (55c, 56d) of the second upper partition member (54), and the intermediate side plate portion (83) The left and right end portions of the second upper partition member (54) are disposed so as to abut on the abutment portions (55b, 56e, 59a). When the third upper partition member (80) is arranged in this way, the space between the right side wall portion (55) and the central partition portion (56) is divided into two spaces (ie, the indoor air supply chamber (19a)). And an outdoor exhaust chamber (19b)). The third upper partition member (80) constitutes an air supply / exhaust partition portion that is detachably attached to the casing (11) so as to partition the indoor air supply chamber (19a) and the outdoor exhaust chamber (19b) forward and backward.

  The air supply fan unit (84) includes an air supply fan (85) and an air supply side mounting plate (86) for supporting the air supply fan (85). The air supply fan (85) is a centrifugal multi-blade fan (so-called sirocco fan). The air supply side mounting plate (86) includes a main body (86a) to which the motor of the air supply fan (85) is attached, a side plate (86b) formed on the left and right sides of the main body (86a), (86a) and an upper plate part (86c) formed on the upper side. Each side plate part (86b) of the supply side mounting plate (86) is installed on each installation surface (55c, 56d) of the second upper partition member (54). Further, the right side plate portion (86b) and the upper plate portion (86c) of the supply side mounting plate (86) are connected to the above-described front panel (14) (see FIG. 13) via a fastening member such as a screw. Fixed.

  The exhaust fan unit (87) includes an exhaust fan (88) and an exhaust side mounting plate (89) for supporting the exhaust fan (88). The exhaust fan (88) is a centrifugal multi-blade fan (so-called sirocco fan). The exhaust side mounting plate (89) includes a main body portion (89a) to which the motor of the exhaust fan (88) is mounted, and side plate portions (89b) formed on the left and right sides of the main body portion (89a). . Each side plate part (89b) of the exhaust side mounting plate (89) is installed on each installation surface (55c, 56d) of the second upper partition member (54). Further, these side plate portions (89b) are fixed to the top plate (13) via the reinforcing rib (75) described above.

<Configuration of refrigerant circuit>
The humidity control apparatus (10) includes a refrigerant circuit (30) to which the compressor (31) and the adsorption heat exchanger (33) described above are connected. The configuration of the refrigerant circuit (30) will be described with reference to FIG.

  The refrigerant circuit (30) is a closed circuit to which refrigerant pipes are connected, and is filled with refrigerant. In the refrigerant circuit (30), the refrigerant circulates to perform a vapor compression refrigeration cycle. A compressor (31), a four-way switching valve (32), a first adsorption heat exchanger (33a), and a second adsorption heat exchanger (33b) are connected to the refrigerant circuit (30).

  The compressor (31) has a variable capacity (operating frequency) by so-called inverter control. That is, the motor of the compressor (31) is configured such that the rotation speed can be adjusted according to the output frequency (operating frequency) of the supplied AC power.

  The four-way switching valve (32) has first to fourth ports and is configured to be able to switch the communication state of these ports. The first port of the four-way switching valve (32) is connected to the discharge pipe (31a) of the compressor (31), and the third port of the four-way switching valve (32) is the suction pipe (31b) of the compressor (31). Connected to. The second port of the four-way selector valve (32) is connected to one end of the first adsorption heat exchanger (33a), and the fourth port of the four-way selector valve (32) is the second adsorption heat exchanger (33b). Connected to one end. The four-way switching valve (32) communicates the first port and the fourth port to communicate the second port and the third port (first state shown by the solid line in FIG. 23), the first port and the second port. It is configured to be switchable to a state (second state indicated by a broken line in FIG. 23) in which the two ports are communicated and the third port and the fourth port are communicated. That is, the four-way switching valve (32) includes a flow path in which the refrigerant radiates heat in the second adsorption heat exchanger (33b) and evaporates in the first adsorption heat exchanger (33a), and the first adsorption heat exchanger ( A refrigerant flow path switching mechanism for switching the flow path of the refrigerant circuit (30) to the flow path where the refrigerant radiates heat in 33a) and evaporates in the second adsorption heat exchanger (33b) is configured.

The refrigerant circuit (30) is provided with a one-way circuit (36) that keeps the refrigerant flow in one direction even when the state of the four-way switching valve (32) is switched. This one-way circuit (36) has a bridge circuit (36a) in which first to fourth check valves (CV-1, CV-2, CV-3, CV-4) are connected in a bridge shape. doing. Each check valve (CV-1, CV-2, CV-3, CV-4) of the bridge circuit (36a) allows the refrigerant to flow in the direction of the arrow in FIG. The flow of is prohibited. The four-way switching valve (32) and the bridge circuit (36a) constitute a refrigerant-side switching unit.

A first refrigerant passage (6) extending from between the first check valve (CV-1) and the second check valve (CV-2) is provided at the other end of the first adsorption heat exchanger (33a). A second refrigerant passage (7) connected and extending from between the first check valve (CV-1) and the third check valve (CV-3) is provided at one end of the reheat heat exchanger (35). A third refrigerant passage (8) connected between the third check valve (CV-3) and the fourth check valve (CV-4) is connected to the second adsorption heat exchanger (33b). A fourth refrigerant passage (9) connected to the end and extending from between the fourth check valve (CV-4) and the second check valve (CV-2) connects the reheat side expansion valve (38). Then, it is connected to the other end of the reheat heat exchanger (35). The second refrigerant passage (7) is disposed on the downstream side of the air passing through the reheat heat exchanger (35). The reheat side expansion valve (38) constitutes a second expansion valve.

The refrigerant circuit (30) is provided with a bypass pipe (36b) that connects the two refrigerant passages (7) and the fourth refrigerant passage (9). A main expansion valve (37) is attached to the bypass pipe (36b). The main expansion valve (37) and the reheat side expansion valve (38) are electrically operated flow rate control valves whose opening degree is variable, and are constituted by, for example, electronic expansion valves. The bypass pipe (36b) constitutes a bypass passage. The main expansion valve (37) constitutes a first expansion valve.

<Control unit and sensor>
As shown in FIG. 23, the humidity control apparatus (10) includes a controller (100) and various sensors. The controller (100) adjusts the operating capacity of the compressor (31) and the opening of each expansion valve (37, 38) according to the operating conditions and the detection values of the sensors. Further, the controller (100) adjusts the open / close state of each damper (D1 to D8) and the operating air volume of each fan (85, 88) according to the operating conditions.

  As schematically shown in FIG. 15B, the humidity controller (10) of the second embodiment includes an inside air humidity sensor (111), an outside air humidity sensor (113), and a first outside air temperature sensor (114). And a second outside temperature sensor (115).

  The room air humidity sensor (111) is disposed in the upper room air flow path (69). The room air humidity sensor (111) detects the humidity (relative humidity) of the room air (RA) taken into the room air suction chamber (19d).

  The outside air humidity sensor (113) and the first outside air temperature sensor (114) are disposed between the filter (26, 27) and the reheat heat exchanger (35) in the lower outside air flow path (63a). The outdoor air humidity sensor (113) detects the humidity (relative humidity) of the outdoor air (OA) upstream of the reheat heat exchanger (35), and the first outdoor air temperature sensor (114) is the reheat heat exchanger (35). ) Detect the temperature of the outdoor air (OA) upstream. The second outside air temperature sensor (115) is disposed on the downstream side of the reheat heat exchanger (35) in the lower outside air passage (63a). The second outside air temperature sensor (115) detects the temperature of the outdoor air (OA) on the downstream side of the reheat heat exchanger (35).

  In the controller (100) of the second embodiment, based on the detection values of these sensors (111, 113, 114, 115), the required humidity control capacity of the humidity control device (10) (humidification load during dehumidification operation or humidification load during humidification operation) ) Is required. The controller (100) controls the operating capacity of the compressor (31) (that is, the refrigerant circulation amount of the refrigerant circuit (30)) so as to satisfy this humidity control capability.

-Driving action-
Next, the operation of the humidity control apparatus (10) will be described in order with reference to the drawings. The humidity control apparatus (10) is executed by switching between a dehumidifying operation for dehumidifying the room and a humidifying operation for humidifying the room.

<Dehumidifying operation>
The dehumidifying operation is performed under conditions where the outdoor temperature and humidity are relatively high in summer and the like. In this dehumidifying operation, outdoor air (OA) is dehumidified, and the dehumidified air is supplied indoors as supply air (SA). At the same time, in the dehumidifying operation, the room air (RA) is discharged to the outside as exhaust air (EA). In the dehumidifying operation, the first operation and the second operation are alternately performed at predetermined intervals, and the room is continuously dehumidified.

  In the first operation of the dehumidifying operation, in the refrigerant circuit (30) shown in FIG. 23, the four-way switching valve (32) is set to the first state, and the reheat side expansion valve (38) is almost fully closed. The expansion valve (37) is opened at a predetermined opening. When the compressor (31) is operated, the refrigerant compressed by the compressor (31) dissipates heat in the second adsorption heat exchanger (33b), passes through the bridge circuit (36a), and bypass piping (36b) Flowing. In the bypass pipe (36b), the refrigerant is decompressed by the main expansion valve (37). The refrigerant decompressed by the main expansion valve (37) passes through the bridge circuit (36a), evaporates in the first adsorption heat exchanger (33a), and is sucked into the compressor (31).

  In the second operation of the dehumidifying operation, in the refrigerant circuit (30) shown in FIG. 23, the four-way switching valve (32) is set to the second state, and the reheat side expansion valve (38) is almost fully closed. The expansion valve (37) is opened at a predetermined opening. When the compressor (31) is operated, the refrigerant compressed by the compressor (31) dissipates heat in the first adsorption heat exchanger (33a), passes through the bridge circuit (36a), and bypass piping (36b) Flowing. In the bypass pipe (36b), the refrigerant is decompressed by the main expansion valve (37). The refrigerant decompressed by the main expansion valve (37) passes through the bridge circuit (36a), evaporates in the second adsorption heat exchanger (33b), and is sucked into the compressor (31).

  As described above, in the dehumidifying operation of the humidity control apparatus (10), in principle, no refrigerant is supplied to the reheat heat exchanger (35). That is, in the dehumidifying operation, the reheat heat exchanger (35) is stopped.

In the first operation of the dehumidifying operation, as shown in FIGS. 24 and 25, the first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are opened. The second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are closed, and the air supply fan (85) and the exhaust fan (88) are operated. . In FIGS. 24 to 27, the hatched damper is in the closed state, and the white damper is in the open state. In FIGS. 24 to 27, white arrows represent the air (outdoor air (OA) or supply air (SA) ) supplied from the outside to the inside of the room, and the black arrows are exhausted from the inside to the outside of the room. Air (room air (RA) or exhaust air (EA)).

  In the first operation of the dehumidifying operation, the outdoor air (OA) taken into the outside air suction chamber (19c) via the duct flows in the duct inner passage (71) and the outside air inflow passage (61) in this order, It flows into the outside air flow path (63a). The air flows through the insect filter (26) and the pleat filter (27) in order, and then passes through the reheat heat exchanger (35). In the dehumidifying operation, the reheat heat exchanger (35) is stopped as described above. For this reason, air is not heated in the reheat heat exchanger (35).

  The air that has passed through the reheat heat exchanger (35) flows through the upper outside air passage (63b), the intermediate outside air passage (64), and the first damper (D1) in this order, and then passes through the first adsorption heat exchanger (33a). To do. In the first adsorption heat exchanger (33a) in the evaporator state, water vapor in the air is adsorbed by the adsorbent. The heat of adsorption generated at this time is used for the heat of evaporation of the refrigerant. The air adsorbed and dehumidified by the first adsorption heat exchanger (33a) flows through the seventh damper (D7), the upper air supply channel (70), and the indoor air supply chamber (19a) in this order, and passes through the duct. Supplied to the indoor space as supply air (SA).

  In the first operation of the dehumidifying operation, the room air (RA) taken into the room air suction chamber (19d) via the indoor duct flows in order through the upper room air flow path (69) and the sixth damper (D6). And passing through the second adsorption heat exchanger (33b). In the second adsorption heat exchanger (33b) in the state of a radiator, water vapor is desorbed from the adsorbent into the air, and the adsorbent is regenerated. The air used for regeneration of the adsorbent of the second adsorption heat exchanger (33b) is the fourth damper (D4), the intermediate exhaust passage (65), the exhaust communication passage (68), the outdoor exhaust chamber (19b) In order, and is discharged as exhaust air (EA) to the outdoor space via the duct.

  In the second operation of the dehumidifying operation, as shown in FIGS. 26 and 27, the second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are opened. The first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are closed, and the air supply fan (85) and the exhaust fan (88) are operated. .

  In the second operation of the dehumidifying operation, the outdoor air (OA) taken into the outside air suction chamber (19c) via the duct flows in the duct inner passage (71) and the outside air inflow passage (61) in this order, It flows into the outside air flow path (63a). The air flows through the insect filter (26) and the pleat filter (27) in order, and then passes through the reheat heat exchanger (35). In the dehumidifying operation, the reheat heat exchanger (35) is stopped as described above. For this reason, air is not heated in the reheat heat exchanger (35).

  The air that has passed through the reheat heat exchanger (35) flows through the upper outside air passage (63b), the intermediate outside air passage (64), and the second damper (D2) in this order, and then passes through the second adsorption heat exchanger (33b). To do. In the second adsorption heat exchanger (33b) in the evaporator state, water vapor in the air is adsorbed by the adsorbent. The heat of adsorption generated at this time is used for the heat of evaporation of the refrigerant. The air adsorbed and dehumidified by the second adsorption heat exchanger (33b) flows through the eighth damper (D8), the upper air supply channel (70), and the indoor air supply chamber (19a) in this order, via the duct. Supplied to the indoor space as supply air (SA).

  In the second operation of the dehumidifying operation, the room air (RA) taken into the room air suction chamber (19d) via the indoor duct flows in order through the upper room air flow path (69) and the fifth damper (D5). And passes through the first adsorption heat exchanger (33a). In the first adsorption heat exchanger (33a) in the state of a radiator, water vapor is desorbed from the adsorbent into the air, and the adsorbent is regenerated. The air used for the regeneration of the adsorbent of the first adsorption heat exchanger (33a) passes through the third damper (D3), the intermediate exhaust passage (65), the exhaust communication passage (68), the outdoor exhaust chamber. (19b) flows in order and is discharged as exhaust air (EA) to the outdoor space via the duct.

<Humidification operation>
The humidification operation is performed under conditions where the outdoor temperature and humidity are relatively low in winter and the like. In this humidification operation, outdoor air (OA) is humidified, and the humidified air is supplied indoors as supply air (SA). At the same time, in the humidifying operation, the room air (RA) is discharged to the outside as exhaust air (EA). In this humidification operation, the first operation and the second operation are alternately performed at predetermined intervals, and the room is continuously humidified.

  In the first operation of the humidifying operation, in the refrigerant circuit (30) shown in FIG. 23, the four-way switching valve (32) is set to the second state, the main expansion valve (37) is closed, and the reheat side expansion valve (38 ) Is opened at a predetermined opening. When the compressor (31) is operated, the refrigerant compressed by the compressor (31) dissipates heat in the first adsorption heat exchanger (33a), passes through the bridge circuit (36a), and is in a gas-liquid two-phase state. The high-pressure refrigerant flows through the reheat heat exchanger (35), and this refrigerant radiates heat to the air (outdoor air (OA)). The refrigerant radiated by the reheat heat exchanger (35) is decompressed by the reheat side expansion valve (38). The refrigerant decompressed by the reheat side expansion valve (38) passes through the bridge circuit (36a), evaporates in the second adsorption heat exchanger (33b), and is sucked into the compressor (31).

  In the second operation of the humidifying operation, in the refrigerant circuit (30) shown in FIG. 23, the four-way switching valve (32) is set to the first state, the main expansion valve (37) is closed, and the reheat side expansion valve (38 ) Is opened at a predetermined opening. When the compressor (31) is operated, the refrigerant compressed by the compressor (31) dissipates heat in the second adsorption heat exchanger (33b), passes through the bridge circuit (36a), and is in a gas-liquid two-phase state. The high-pressure refrigerant flows through the reheat heat exchanger (35), and this refrigerant radiates heat to the air (outdoor air (OA)). The refrigerant radiated by the reheat heat exchanger (35) is decompressed by the reheat side expansion valve (38). The refrigerant decompressed by the reheat side expansion valve (38) passes through the bridge circuit (36a), evaporates by the first adsorption heat exchanger (33a), and is sucked into the compressor (31).

  As described above, in the humidifying operation of the humidity control apparatus (10), the refrigerant is supplied to the reheat heat exchanger (35), and the reheat heat exchanger (35) is operated. The heating capacity of the reheat heat exchanger (35) is appropriately adjusted according to the opening degree of the reheat side expansion valve (38). In this humidification operation, if the temperature of the outdoor air (OA) becomes higher than the predetermined temperature, the reheat side expansion valve (38) is almost fully closed, and the main expansion valve (37) is opened at a predetermined opening degree. Is done. Thereby, air can be humidified by each adsorption heat exchanger (33a, 33b), stopping a reheat heat exchanger (35).

  In the first operation of the humidifying operation, as shown in FIGS. 24 and 25, the first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are opened. The second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are closed, and the air supply fan (85) and the exhaust fan (88) are operated. .

  In the first operation of the humidifying operation, the outdoor air (OA) taken into the outside air suction chamber (19c) via the duct flows in the duct inner passage (71) and the outside air inflow passage (61) in this order. It flows into the outside air flow path (63a). The air flows through the insect filter (26) and the pleat filter (27) in order, and then passes through the reheat heat exchanger (35). In the humidification operation, a refrigerant is appropriately supplied to the reheat heat exchanger (35), and the outdoor air (OA) is heated by the reheat heat exchanger (35).

  The air heated by the reheat heat exchanger (35) flows through the upper outside air passage (63b), the intermediate outside air passage (64), and the first damper (D1) in this order, and passes through the first adsorption heat exchanger (33a). pass. In the first adsorption heat exchanger (33a) in the state of a radiator, water vapor is desorbed from the adsorbent into the air, and the air is humidified. The air humidified by the first adsorption heat exchanger (33a) flows in order through the seventh damper (D7), the upper air supply channel (70), and the indoor air supply chamber (19a), and enters the indoor space via the duct. Supplied as supply air (SA).

  In the first operation of the humidification operation, the room air (RA) taken into the room air suction chamber (19d) via the indoor duct flows in order through the upper room air flow path (69) and the sixth damper (D6). And passing through the second adsorption heat exchanger (33b). In the second adsorption heat exchanger (33b) in the evaporator state, water vapor in the air is adsorbed by the adsorbent, and moisture is given to the adsorbent. The air given moisture to the adsorbent of the second adsorption heat exchanger (33b) passes through the fourth damper (D4), the intermediate exhaust passage (65), the exhaust communication passage (68), and the outdoor exhaust chamber (19b). It flows in order and is discharged as exhaust air (EA) to the outdoor space via the duct.

  In the second operation of the humidifying operation, as shown in FIGS. 26 and 27, the second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are opened. The first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are closed, and the air supply fan (85) and the exhaust fan (88) are operated. .

  In the second operation of the humidifying operation, the outdoor air (OA) taken into the outside air suction chamber (19c) via the duct flows in the duct inner passage (71) and the outside air inflow passage (61) in this order, It flows into the outside air flow path (63a). The air flows through the insect filter (26) and the pleat filter (27) in order, and then passes through the reheat heat exchanger (35). In the humidification operation, a refrigerant is appropriately supplied to the reheat heat exchanger (35), and the outdoor air (OA) is heated by the reheat heat exchanger (35).

  The air heated by the reheat heat exchanger (35) flows through the upper outside air passage (63b), the intermediate outside air passage (64), and the second damper (D2) in this order, and passes through the second adsorption heat exchanger (33b). pass. In the second adsorption heat exchanger (33b) in the state of a radiator, water vapor is desorbed from the adsorbent into the air, and the air is humidified. The air humidified by the second adsorption heat exchanger (33b) flows in order through the eighth damper (D8), the upper air supply channel (70), and the indoor air supply chamber (19a), and enters the indoor space via the duct. Supplied as supply air (SA).

  In the second operation of the humidifying operation, the room air (RA) taken into the room air suction chamber (19d) via the indoor duct flows in order through the upper room air flow path (69) and the fifth damper (D5). And passes through the first adsorption heat exchanger (33a). In the first adsorption heat exchanger (33a) in the evaporator state, water vapor in the air is adsorbed by the adsorbent, and moisture is given to the adsorbent. The air that has given moisture to the adsorbent of the first adsorption heat exchanger (33a) passes through the third damper (D3), the intermediate exhaust passage (65), the exhaust communication passage (68), and the outdoor exhaust chamber (19b). It flows in order and is discharged as exhaust air (EA) to the outdoor space via the duct.

-Effect of Embodiment 2-
According to the second embodiment, the reheat heat exchanger (35) is always operated regardless of which refrigerant flow is switched to the refrigerant circuit (30) by the four-way switching valve (32) and the bridge circuit (36a). Becomes a radiator and can be introduced into the adsorption heat exchanger (33a, 33b) after the outdoor air having a low temperature is heated by the reheat heat exchanger (35). As a result, problems such as freezing of the drain water of the adsorption heat exchanger (33a, 33b) are eliminated, and the humidity control apparatus can be operated well even when the outdoor air is at a low temperature.

    Further, according to the second embodiment, by providing a bypass pipe (36b) in the refrigerant circuit (30), at least a part of the refrigerant going to the reheat heat exchanger (35) is bypassed through the bypass pipe (36b). Can be made. Thereby, for example, when the temperature of outdoor air is high, it is possible to prevent the outdoor air from being heated unnecessarily.

    Further, according to the second embodiment, the main expansion valve and the reheat side expansion valve (37, 38) have the refrigerant expansion operation related to the refrigeration cycle and the refrigerant bypass amount related to the reheat heat exchanger (35). It also serves as both adjustment operation. Accordingly, there is no need to provide two valves for the refrigerant expansion operation and the bypass amount adjustment operation, the number of components of the humidity control device is reduced, and the cost of the humidity control device can be reduced. .

    Further, according to the second embodiment, the check valve bridge circuit (36a) is compared with the case where the bypass pipe (36b) connects the first refrigerant passage (6) and the third refrigerant passage (8). ) Can be reduced as much as the refrigerant is not bypassed. Thereby, at the time of the bypass operation in which the refrigerant passes through the bypass pipe (36b), the refrigerant shortage due to the accumulation of the refrigerant hardly occurs, and the bypass operation can be stably performed.

<Other embodiments>
The present invention may be configured as follows with respect to the above embodiment.

    In the first embodiment, the adsorbent is mainly a material that adsorbs water vapor, such as zeolite or silica gel. However, the present invention is not limited to this, and a material that performs both adsorption and absorption of water vapor (so-called absorption). Adhesive) may be used.

Specifically, the adsorbent of the other embodiment forms state of the present invention, an organic polymer material having a hygroscopic property is used as an adsorbent. In an organic polymer material used as an adsorbent, a plurality of polymer main chains having hydrophilic polar groups in the molecule are cross-linked with each other, and the plurality of polymer main chains cross-linked with each other form a three-dimensional structure. Forming.

    The adsorbent of this form swells by capturing (that is, absorbing moisture) water vapor. The mechanism by which the adsorbent swells by absorbing moisture is presumed as follows. In other words, when this adsorbent absorbs moisture, water vapor is adsorbed around the hydrophilic polar group, and the electric force generated by the reaction between the hydrophilic polar group and water vapor acts on the polymer main chain. As a result, the polymer main chain is deformed. Then, water vapor is taken into the gap between the deformed polymer main chains by capillary force, and when the water vapor enters, a three-dimensional structure composed of a plurality of polymer main chains swells, resulting in an increase in the volume of the adsorbent. .

Thus, in the adsorbent of this embodiment , both the phenomenon in which water vapor is adsorbed by the adsorbent and the phenomenon in which water vapor is absorbed by the adsorbent occur. That is, water vapor is sorbed on the adsorbent. Further, the water vapor trapped in the sorbent enters not only the surface of the three-dimensional structure composed of a plurality of polymer main chains cross-linked with each other but also into the interior thereof. As a result, a large amount of water vapor is trapped in this adsorbent as compared with zeolite that only adsorbs water vapor on the surface.

    Further, the adsorbent shrinks by releasing water vapor (that is, moisture release). That is, when this adsorbent dehumidifies, the amount of water trapped in the gap between the polymer main chains decreases, and the shape of the three-dimensional structure composed of a plurality of polymer main chains is reduced. The volume of the adsorbent decreases as it returns.

    In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

    As described above, the present invention is useful for a humidity control apparatus.

111 Casing 129 Mounting plate 130 Pipe communication part 150 Outdoor suction port 151 Indoor air supply port 170 Refrigerant circuit 175 Second adsorption heat exchanger 176 First adsorption heat exchanger 194 Auxiliary heat exchanger 195 Second motor operated valve 196 Bypass circuit

Claims (4)

Compressor (31,172), first adsorption heat exchanger (33a, 176) and second adsorption heat exchanger (33b, 175) carrying adsorbent, auxiliary heat exchanger (35,194), expansion mechanism (37 , 38) (198,195) is connected to the refrigerant circuit (30,170) for performing the refrigeration cycle by circulating the refrigerant,
A first state in which the outdoor air that has passed through the auxiliary heat exchanger (35,194) is conditioned with the adsorbent of the first adsorption heat exchanger (33a, 176), and the outdoor air that has passed through the auxiliary heat exchanger (35,194) An air-side switching unit (D1 to D4, D13 to D16) that can be switched to a second state in which the humidity is adjusted with the adsorbent of the second adsorption heat exchanger (33b, 175),
Connected to the refrigerant circuit (30,170), the first adsorption heat exchanger (33a, 176) and the auxiliary heat exchanger (35,194) dissipate the refrigerant and the second adsorption heat exchanger (33b, 175). In the first state in which the refrigerant absorbs heat, the second adsorption heat exchanger (33b, 175) and the auxiliary heat exchanger (35, 194) dissipate the refrigerant, and the first adsorption heat exchanger (33a, 176) A switching unit (32, 36a) (173, 188) on the refrigerant side that can be switched to the second state in which the refrigerant absorbs heat;
A humidity control device comprising: In claim 1,
The humidity control apparatus, wherein the refrigerant circuit (30, 170) is provided with a bypass passage (36b, 197) that bypasses the auxiliary heat exchanger (35, 194). In claim 2,
The expansion mechanism (37,38) (198,195) includes a first expansion valve (37,198) that depressurizes the refrigerant flowing through the bypass passage (36b, 197) and a refrigerant that has passed through the auxiliary heat exchanger (35,194). A humidity control apparatus comprising: a second expansion valve (38,195) for reducing pressure. In claim 3,
The switching unit (32, 36a) (173, 188) on the refrigerant side includes a check valve bridge circuit (36a, 188) having first to fourth check valves (CV-1 to CV-4) (189a to 191a). )
A first refrigerant passage (6) extending from between the first check valve (CV-1,189a) and the second check valve (CV-2,190a) is connected to the first adsorption heat exchanger (33a, 176). A second refrigerant passage (7) connected to one end and extending from between the first check valve (CV-1,189a) and the third check valve (CV-3,191a) is connected to the auxiliary heat exchanger (35,194). ), And a third refrigerant passage (8) extending from between the third check valve (CV-3, 191a) and the fourth check valve (CV-4, 192a) has a second adsorption heat exchange. A fourth refrigerant passage (9) connected to one end of the vessel (33b, 175) and extending from between the fourth check valve (CV-4, 192a) and the second check valve (CV-2, 190a) While connected to the other end of the auxiliary heat exchanger (35,194) through the second expansion valve (38,195),
The bypass passage (36b, 197) connects the two refrigerant passages (7) and the fourth refrigerant passage (9).

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