JP2014196879A - Humidity controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dew condensation in a humidity controller controlling humidities of a plurality of rooms.SOLUTION: A humidity control unit (30 ...) supplying humid air to each room is provided. A control unit (100) is provided to be configured to actuate the humidity control unit (30 ...) in an absolute humidity control mode for controlling a humidification amount of the humidity control unit based on an absolute humidity, and in a relative humidity control mode for controlling the humidification amount of the humidity control unit (30 ...) based on a relative humidity, and for selecting the relative humidity control mode if an absolute humidity threshold (Rs2) corresponding to a predetermined reference relative humidity (Rb) at a current temperature of the air vacuumed from each room is lower than a preset absolute humidity set value (Rs1).

Description

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

  2. Description of the Related Art Conventionally, an apparatus that performs indoor humidity control is known (see, for example, Patent Document 1). In the example of Patent Document 1, the absolute humidity of the conditioned space is calculated from the temperature and relative humidity of the conditioned space detected by the indoor temperature sensor and the indoor humidity sensor, and the absolute humidity is maintained at a predetermined reference value. Dehumidifying.

JP 2007-263425 A

  By the way, in a humidity control apparatus that adjusts the humidity of a plurality of rooms with a single humidity control unit, when the humidity is controlled using the absolute humidity as a target value, the room in which air conditioning (herein, temperature adjustment of room air) is performed. Then, even if the relative humidity is appropriate, the relative humidity becomes high in a room where air conditioning is not performed, and depending on conditions such as the outside air temperature, there is a high possibility of condensation on the window. Condensation is not preferable because it may promote the generation of mold. This problem is considered to become more prominent as the house becomes highly airtight and highly insulated.

  For this, it is easy to prevent condensation by controlling the humidity with the relative humidity as the target value, but for the wood part of the house, if the moisture content in the air is contained, cracking etc. There is also a theory that this is advantageous, and in a room in which temperature control such as heating is performed, there is a possibility of moisture shortage (overdrying) by control targeting relative humidity.

  The present invention has been made paying attention to the above-described problem, and an object of the present invention is to prevent condensation in a humidity control apparatus that adjusts the humidity of a plurality of rooms.

In order to solve the above-mentioned problem, the first invention
In a humidity control device that adjusts humidity in multiple rooms,
A humidity control unit (30…) that inhales air in each room and sends humid air to each room,
An absolute humidity control mode for controlling the humidification amount of the humidity control section (30 ...) based on absolute humidity, and a relative humidity control mode for controlling the humidification amount of the humidity control section (30 ...) based on relative humidity The humidity control unit (30 ...) is configured to be controllable, and an absolute humidity threshold value (Rs2) corresponding to a predetermined reference relative humidity (Rb) at the current temperature (Tr) of the air sucked from each room, When the absolute humidity setting value (Rs1) set in advance is smaller, the control unit (100) for selecting the relative humidity control mode,
It is provided with.

  In this configuration, when the relative humidity is relatively high, the relative humidity control mode is selected, and the moisture amount is limited to a predetermined amount or less. In addition, an absolute humidity control mode can be selected, and a predetermined amount of water can be secured by the selection.

In addition, the second invention,
In the humidity control apparatus of the first invention,
The control unit (100) selects the absolute humidity control mode when the temperature (Tr) of air sucked from the room exceeds a predetermined threshold temperature (Tt).

  In this configuration, absolute humidity control is performed according to the temperature (Tr). Therefore, for example, in a room where heating is performed, a necessary amount of moisture is secured.

In addition, the third invention,
In the humidity control apparatus of the first or second invention,
The control unit (100) changes the reference relative humidity (Rb) according to a temperature (Tr) of air sucked from the room.

  In this configuration, since the reference relative humidity (Rb) is changed according to the temperature (Tr), a margin for condensation is ensured in the relative humidity control mode.

  According to the first invention, when the relative humidity is relatively high, the relative humidity control mode is selected, and the moisture amount is limited to a predetermined amount or less. It becomes possible to prevent condensation while preventing overdrying.

  In addition, according to the second invention, since a necessary amount of water is ensured, overdrying is prevented.

  In addition, according to the third aspect, condensation can be prevented more reliably.

FIG. 1 schematically shows the installation state of the humidity control apparatus of the first embodiment. FIG. 2 is a perspective view illustrating a casing structure of the humidity control apparatus according to the first embodiment. FIG. 3 is a perspective view illustrating a frame structure of the humidity control apparatus according to the first embodiment. FIG. 4 is a configuration diagram schematically illustrating the humidity control apparatus according to the first embodiment. FIG. 4A is a top view of the humidity control apparatus, and FIG. 4B is an internal structure of the humidity control apparatus. 4C shows the internal structure of the humidity control apparatus from the left side, and FIG. 4D shows the internal structure of the humidity control apparatus from the right side. FIG. 5 is a configuration diagram schematically illustrating the humidity control apparatus according to the first embodiment. FIG. 5A illustrates the internal structure of the humidity control apparatus as viewed from the YY cross section of FIG. FIG. 5 (B) shows the internal structure of the humidity control apparatus as viewed from the ZZ cross section of FIG. 5 (A). FIG. 6 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the first embodiment, and particularly shows the internal structure of the lower space. FIG. 7 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the first embodiment, and particularly shows the peripheral structure of the reheat heat exchanger. FIG. 8 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the first embodiment, and particularly shows the peripheral structure of the lower damper. FIG. 9 is an assembled perspective view showing the internal structure of the humidity control apparatus according to the first embodiment, and particularly shows the peripheral structure of the upper damper. FIG. 10 is a perspective view of the adsorption heat exchanger according to the first embodiment, in which the surrounding humidity control chamber is added using virtual lines. FIG. 11 is a perspective view showing the internal structure of the humidity control apparatus according to the first embodiment, and particularly shows the internal structure of the upper space. FIG. 12 is a schematic configuration diagram of a refrigerant circuit of the humidity control apparatus according to the first embodiment. FIG. 13 is a diagram corresponding to FIG. 4 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 first embodiment. FIG. 14 is a view corresponding to FIG. 5 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 first embodiment. FIG. 15 is a diagram corresponding to FIG. 4 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 first embodiment. FIG. 16 is a diagram corresponding to FIG. 5 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 first embodiment. FIG. 17 is a schematic configuration diagram of the controller and each sensor. FIG. 18 shows a control mode selection process in the humidifying operation. FIG. 19 shows a humidity control pattern according to the first embodiment. FIG. 20 shows a humidity control pattern 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
A first embodiment of the present invention will be described. FIG. 1 schematically shows an installation state of the humidity control apparatus (10) according to the first embodiment of the present invention. This humidity control apparatus (10) is installed in a so-called detached house, for example. This humidity control device (10) is a floor-type humidity control device that is installed on the floor surface of a 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. As shown in FIG. 1, the humidity control apparatus (10) is connected to each room to be controlled by the inside air duct (200) and the air supply duct (201). That is, the inside air duct (200) extends from the inside air connection port (18d) described later to each room. Further, the air supply duct (201) extends from the air supply connection port (18a) described later to each room. In addition, the arrow in FIG. 1 shows the flow of air.

  The configuration of the humidity control apparatus (10) will be described with reference to the drawings. FIG. 2 is a perspective view showing the casing structure of the humidity control apparatus according to the present embodiment. FIG. 3 is a perspective view showing the frame structure of the humidity control apparatus according to the present embodiment. In addition, in the following description, the description indicating each direction 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. 4 and 5 schematically show the humidity control device (10). FIG. 4 (A) shows the upper surface of the humidity control device (10), and FIG. 4 (B) shows the humidity control device. FIG. 4 (C) shows the internal structure on the left side of the humidity control device (10), and FIG. 4 (D) shows the internal structure on the right side of the humidity control device. 5A shows the internal structure of the humidity control apparatus of FIG. 4A as viewed from the YY cross section, and FIG. 5B shows the humidity control apparatus of FIG. The internal structure is viewed from the ZZ cross section.

<Case structure>
As shown in FIG. 2, 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) is installed such that the rear panel (15) is in contact with 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 inside air connection port (18d) communicate with the indoor space through the air supply duct (201) and the inside air duct (200), respectively, and the exhaust connection port (18b) and the outside air connection port. (18c) communicates with the outdoor space via the ducts (202, 203), respectively. 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. 3, 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. 3, 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. 6 and 7, a lower partition member (41) is installed along the left side panel (17) in the lower space (S1). 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. 7).

  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. 4B and 7). 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. 7 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. 6). 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. 6, in the lower space (S1), the machine room (60) is partitioned into 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. 8, the first intermediate partition member (43) closes the upper open portion 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. 9, the second intermediate partition member (44) is supported on the first intermediate frame (23a) and the second intermediate frame (23b), and is predetermined above 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. 8, 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 plate (45b) is fitted into the right groove (43c) of the first intermediate partition member (43), and the upper end of the exhaust damper partition plate (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. 4, 8, and 9, 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. 8 and 10, 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 the figure, 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). 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. 9, the third intermediate partition member (47) is stacked 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. 9 and 11). 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. 11, a first upper partition member (51), a second upper partition member (54), and a third upper partition member (80) are provided in the upper space (S3). 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. 4B).

  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 (59) below the exhaust fan unit (87) (FIG. 5A). 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. 11, 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). 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 portion (86a) to which the motor of the air supply fan (85) is attached, a side plate portion (86b) formed on the left and right sides of the main body portion (86a), and a main body portion. (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). In addition, 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. 2) 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 switching valve (32) is connected to the gas side end of the first adsorption heat exchanger (33a), and the fourth port of the four-way switching valve (32) is connected to the second adsorption heat exchanger (33b). ) Gas side end. The four-way switching valve (32) communicates the first port and the fourth port to communicate the second port and the third port (the first state indicated by the solid line in FIG. 12), the first port, It is configured to be switchable to a state (second state indicated by a broken line in FIG. 12) in which the two ports communicate with each other and the third port and the fourth port communicate with each other. 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. The one-way circuit (36) includes a bridge circuit (36a) in which four check valves (CV-1, CV-2, CV-3, CV-4) are connected in a bridge shape, and a bridge circuit (36a ), A main circuit (36b) and a reheat circuit (36c) connected in parallel are provided.

  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. In the bridge circuit (36a), the liquid side end of the first adsorption heat exchanger (33a) is connected between the first check valve (C1-1) and the second check valve (CV-2), The liquid side end of the second adsorption heat exchanger (33b) is connected between the third check valve (CV-3) and the fourth check valve (CV-4). Junction part of 1st check valve (CV-1) and 3rd check valve (CV-3), and diversion part of 2nd check valve (CV-2) and 4th check valve (CV-4) The main circuit (36b) and the reheat circuit (36c) are connected in parallel with each other. A main expansion valve (37) is connected to the main circuit (36b). The reheat circuit (36c) is connected to the reheat heat exchanger (35) on the upstream side and to the reheat side expansion valve (38) on the downstream side. 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.

<Controller and sensor>
As shown in FIG. 12, the humidity control apparatus (10) includes a controller (100) as a control unit and various sensors. In the humidity control apparatus (10), the part other than the controller (100) corresponds to the humidity control section (30 ...) of the present invention.

  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. 13, the humidity control apparatus (10) of the present embodiment includes an inside air humidity sensor (111) and an inside air temperature sensor (116). 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 (Rh-r) (relative humidity) of the room air (RA) taken into the room air suction chamber (19d).

  The room temperature sensor (116) is provided in the upper room air channel (69) and detects the temperature (Tr) of the room air (RA). Since the inside air duct (200) is connected to each room, the relative humidity (Rh-r) detected by the inside air humidity sensor (111) is the average relative humidity of each room, and the inside air temperature sensor (116). The temperature (Tr) detected by is the average temperature of each room.

  The controller (100) of the present embodiment includes a calculation unit (101) and a compressor control unit (102) (see FIG. 17). The controller (100) is composed of, for example, a microcomputer and a program for operating the microcomputer. The calculation unit (101) and the compressor control unit (102) constitute a capability control unit that adjusts the capability (dehumidification capability and humidification capability) of the adsorption heat exchanger (33) based on the detection value of each sensor (111, 116). doing.

  The arithmetic unit (101) performs a relative humidity control mode for controlling a humidification amount of the humidity control unit based on absolute humidity and a humidification amount of the humidity control unit based on relative humidity during a humidification operation. The humidity control mode (30...) Can be configured by appropriately selecting a humidity control mode.

  In the absolute humidity control mode, the calculation unit (101) is connected to the adsorption heat exchanger (33) via the compressor control unit (102) so that the average absolute humidity of each room becomes a set value determined by the user. To control the ability. More specifically, the calculation unit (101) controls the capacity of the adsorption heat exchanger (33) by changing the capacity of the compressor (31). The current absolute humidity is calculated using the relative humidity (Rh-r) detected by the room air humidity sensor (111) and the temperature (Tr) detected by the room air temperature sensor (116).

  The absolute humidity setting value is set in the controller (100) by the user via a remote controller (not shown), for example. In the present embodiment, the user is configured to be selectable from three levels of “strong”, “standard”, and “weak” (“strong” has the highest humidity). Here, the absolute humidity corresponding to the user setting (“strong”, “standard”, and “weak”) is defined as the absolute humidity setting value (Rs1).

  On the other hand, the relative humidity control mode is a mode for controlling the capacity of the adsorption heat exchanger (33) so that the average relative humidity of each room becomes a target value. The target relative humidity is a reference relative humidity (Rb), which will be described later, and a predetermined value is set in the calculation unit (101) (for example, set as a constant in the program) so as not to cause condensation at the window. Yes.

  The present embodiment is characterized by selection between the absolute humidity control mode and the relative humidity control mode. In the present embodiment, the controller (100) has a predetermined relative humidity (reference relative humidity (Rb) at the temperature (Tr) detected by the room temperature sensor (116) (that is, the current average temperature of the air sucked from each room). )) And calculate the absolute humidity as a threshold (referred to as absolute humidity threshold (Rs2)). The controller (100) selects the relative humidity control mode when the absolute humidity threshold value (Rs2) is smaller than the absolute humidity set value (Rs1). In this example, the reference relative humidity (Rb) is 70% relative humidity.

  Here, as described above, the absolute humidity setting value (Rs1) is an absolute humidity determined according to “strong”, “standard”, and “weak” set by the user. In addition, the reference relative humidity (Rb) is 70% relative humidity in the present embodiment. That is, the absolute humidity corresponding to 70% relative humidity at the current temperature (Tr) is calculated as the absolute humidity threshold (Rs2), and the absolute humidity threshold (Rs2) is greater than the absolute humidity setting value (Rs1) set by the user. If it is smaller, the relative humidity control mode is selected and the relative humidity is controlled to the reference relative humidity (Rb) (relative humidity 70%).

  The controller (100) of the present embodiment also considers the temperature (Tr) when selecting the absolute humidity control mode and the relative humidity control mode. Specifically, the controller (100) selects the absolute humidity control mode when the temperature (Tr) detected by the room temperature sensor (116) exceeds a predetermined threshold temperature (Tt). ing. In this embodiment, the threshold temperature (Tt) is 15 ° C.

-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. Although the present embodiment is characterized by a humidifying operation, the dehumidifying operation is also described for reference.

<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. 12, 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 passes through the main circuit (36b). Flowing. In the main circuit (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. 12, 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 passes through the main circuit (36b). Flowing. In the main circuit (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 circuit (36c). 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. 13 and 14, the first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are in the open state. 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. The In FIGS. 13 to 16, the hatched damper is in the closed state, and the open damper is in the open state. In FIGS. 13 to 16, 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. 15 and 16, the second damper (D2), the third damper (D3), the fifth damper (D5), and the eighth damper (D8) are in the open state. The first damper (D1), the fourth damper (D4), the sixth damper (D6), and the seventh damper (D7) are closed, and the supply fan (85) and the exhaust fan (88) are operated. The

  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. 12, 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 reheats the circuit (36c). Flowing. In the reheat circuit (36c), the high-pressure refrigerant in a gas-liquid two-phase state flows through the reheat heat exchanger (35), and the 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. 12, 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 reheats the circuit (36c). Flowing. In the reheat circuit (36c), the high-pressure refrigerant in a gas-liquid two-phase state flows through the reheat heat exchanger (35), and the 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 circuit (36c), 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. 13 and 14, 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. 15 and 16, 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.

<Control mode selection>
The controller (100) of this embodiment performs a humidification operation by appropriately selecting an absolute humidity control mode and a relative humidity control mode. FIG. 18 shows a control mode selection process in the humidifying operation. FIG. 19 shows a humidity control pattern according to this embodiment. As shown in FIG. 19, depending on whether the setting is “strong”, “standard”, or “weak”, the humidity of each room is on a line indicated by a solid line, a broken line, and a dashed line, respectively. Take control. In FIG. 19, curves with labels such as 100% and 70% indicate relative humidity.

  First, the controller (100) reads the output of the room air humidity sensor (111) and the output of the room air temperature sensor (116) (step S01). Further, the controller (100) calculates an absolute humidity corresponding to the reference relative humidity (Rb) at the temperature (Tr) detected by the room temperature sensor (116) and sets it as the absolute humidity threshold (Rs2) (step S02).

  Next, the controller (100) compares the absolute humidity threshold value (Rs2) with the absolute humidity set value (Rs1) set by the user in step S00 (step S03).

  For example, assume that the user has set “standard”. The detected temperature (Tr) is 8 ° C. Then, as can be seen from FIG. 19, at this temperature, the absolute humidity (absolute humidity threshold (Rs2)) corresponding to 70% relative humidity (reference relative humidity (Rb)) is the absolute humidity corresponding to the “standard” setting. Less than a certain absolute humidity setting value (Rs1). Therefore, the controller (100) selects the relative humidity control mode (step S05). The target relative humidity in this case is the reference relative humidity (Rb) used to calculate the absolute humidity threshold (Rs2). That is, in this example, the controller (100) controls the capacity of the adsorption heat exchanger (33) so that the relative humidity becomes 70%. Specifically, the controller (100) forcibly switches the setting from “standard” to “weak” and continues the operation for a predetermined time to lower the humidity.

  When the temperature (Tr) is 8 ° C. and the operation is performed with the “standard” setting, as shown in FIG. 19, the relative humidity becomes 90% or more, and condensation is likely to occur on the glass of the window (FIG. 19). Circled (upper) point with hatching. However, in the present embodiment, as described above, the relative humidity control mode is selected and controlled to a predetermined relative humidity (70% in this example) (the point indicated by the black circle (lower side) in FIG. 19). Accordingly, air conditioning is not performed, and condensation is prevented even in a room whose temperature is lower than that of other rooms.

  In the case of Rs1 ≦ Rs2 (for example, in the example of FIG. 19, when “standard” is set and the temperature (Tr) is 15 ° C.), the controller (100) selects the absolute humidity control mode. Thereby, a predetermined moisture amount is secured in each room. In this case, since the temperature (Tr) is relatively high, the possibility of condensation is small.

  By the way, if the relative humidity control mode and the absolute humidity control mode are selected in consideration of only the humidity at that time as described above, the amount of moisture may be insufficient depending on the set value of humidity. Therefore, in the present embodiment, the absolute humidity control mode is selected in a temperature region that is equal to or higher than a predetermined threshold temperature (Tt). Thereby, it becomes possible to secure a necessary amount of water in each room.

<Effect of this embodiment>
As described above, according to the present embodiment, it is possible to prevent condensation while preventing overdrying in a humidity control apparatus that adjusts humidity in a plurality of rooms.

<< Embodiment 2 of the Invention >>
In the above example, only one value (relative humidity 70% in the above example) is used as the reference relative humidity (Rb). However, this value is preferably variable according to the temperature (Tr). This is because the possibility of condensation increases as the temperature (Tr) becomes lower.

  In order to reduce the possibility of condensation, it is conceivable to decrease the value of the reference relative humidity (Rb) used as the reference for calculating the absolute humidity threshold (Rs2) as the temperature (Tr) is lower. As an example of changing the reference relative humidity (Rb), when the temperature (Tr) is 10 ° C. to 15 ° C., the relative humidity 70% is the reference relative humidity (Rb), and when the temperature (Tr) is 10 ° C. or less, the relative humidity 65 It is conceivable that the absolute humidity threshold (Rs2) corresponding to the reference relative humidity (Rb) is calculated. That is, in this example, when the relative humidity control mode is performed, if the temperature (Tr) is 10 ° C. to 15 ° C., the relative humidity in each room is controlled to be 70%, and the temperature (Tr) is 10%. Below ℃, the relative humidity is controlled to be 65%. At 15 ° C. or higher, the absolute humidity control mode is selected as described above. FIG. 20 shows a humidity control pattern according to the second embodiment. In the present embodiment, by making the reference relative humidity (Rb) variable, a margin for condensation is secured, and it becomes possible to prevent condensation more reliably.

<< Other Embodiments >>
Note that the various set values (reference relative humidity (Rb), etc.) described in the embodiment are examples.

  Moreover, you may comprise a humidity control apparatus (10) as an apparatus only for humidification (humidification apparatus).

  Moreover, the structure of the main-body part (mainly parts other than the controller (100)) of a humidity control apparatus (10) is an illustration, and should just be a structure which can humidify air.

  The present invention is useful as a humidity control apparatus that adjusts the humidity of air.

10 Humidity control device 30 Refrigerant circuit (humidity control unit)
100 controller (control unit)

Claims (3)

In a humidity control device that adjusts humidity in multiple rooms,
A humidity control unit (30…) that inhales air in each room and sends humid air to each room,
An absolute humidity control mode for controlling the humidification amount of the humidity control section (30 ...) based on absolute humidity, and a relative humidity control mode for controlling the humidification amount of the humidity control section (30 ...) based on relative humidity The humidity control unit (30 ...) is configured to be controllable, and an absolute humidity threshold value (Rs2) corresponding to a predetermined reference relative humidity (Rb) at the current temperature (Tr) of the air sucked from each room, When the absolute humidity setting value (Rs1) set in advance is smaller, the control unit (100) for selecting the relative humidity control mode,
A humidity control device characterized by comprising: In the humidity control apparatus of Claim 1,
When the temperature (Tr) of the air sucked from the room exceeds a predetermined threshold temperature (Tt), the control unit (100) selects the absolute humidity control mode. . In the humidity control apparatus of Claim 1 or Claim 2,
The said control part (100) changes the said reference | standard relative humidity (Rb) according to the temperature (Tr) of the air inhaled from the said room, The humidity control apparatus characterized by the above-mentioned.

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