JP5071566B2 - Humidity control device - Google Patents

Description

  The present invention relates to a humidity control apparatus that includes a refrigerant circuit provided with an adsorption heat exchanger, and conditioned air with an adsorbent of the adsorption heat exchanger.

  Conventionally, a humidity control apparatus that adjusts the humidity of air using an adsorbent is known. Patent Document 1 discloses a humidity control apparatus including an adsorption heat exchanger having an adsorbent supported on its surface.

  The humidity control device disclosed in Patent Document 1 is provided with a refrigerant circuit including two adsorption heat exchangers. In this refrigerant circuit, the first adsorption heat exchanger serves as a condenser and the second adsorption heat exchanger serves as an evaporator, and the second adsorption heat exchanger serves as a condenser and performs the first adsorption. The operation in which the heat exchanger becomes an evaporator is alternately performed. In the adsorption heat exchanger operating as an evaporator, moisture in the air is adsorbed by the adsorbent. In an adsorption heat exchanger that operates as a condenser, moisture is desorbed from the adsorbent and applied to the air.

  The humidity control device disclosed in Patent Document 1 supplies one of the air that has passed through each adsorption heat exchanger to the room and discharges the other to the outside. In the humidity control apparatus during the dehumidifying operation, the air that has passed through the first and second adsorption heat exchangers that operate as an evaporator is supplied to the room, and the air that has passed through the one that operates as a condenser to the outside. Discharged. Further, in the humidity control apparatus during the humidification operation, the air that has passed through the first and second adsorption heat exchangers that operate as an evaporator is discharged to the outside, and the air that has passed through the one that operates as a condenser is discharged. Supplied indoors.

  By the way, in this kind of humidity control apparatus, the odorous substance (for example, ammonia etc.) in the air may be adsorbed by the adsorbent carried on the adsorption heat exchanger. For this reason, when the odorous substance is desorbed from the adsorbent and supplied into the room at the start of the operation of the humidity control apparatus, the comfort in the room is impaired. Therefore, in the humidity control device disclosed in Patent Document 2, a purge operation for deodorizing the adsorbent is performed separately from the above-described dehumidifying operation and humidifying operation.

  In this purge operation, the taken outdoor air passes through an adsorption heat exchanger that operates as an evaporator. In the adsorption heat exchanger, moisture in outdoor air is adsorbed by the adsorbent, and the moisture content of the adsorbent increases. Along with this, the odorous substance adsorbed on the adsorbent is desorbed and released into the air. The air containing the detached odorous substance is discharged outside the room. By removing the odorous substance from the adsorbent of the adsorption heat exchanger by this purge operation, in the subsequent humidity control operation (dehumidifying operation or humidifying operation), it is avoided that the odorous substance is supplied indoors. Indoor comfort is ensured.

JP 2006-078108 A JP 2009-106889 A

  In the purge operation, odorous substances are desorbed from the adsorbent of the adsorption heat exchanger by sending outdoor air to the adsorption heat exchanger. However, the temperature and humidity of the outdoor air are likely to fluctuate depending on the season and time zone. For this reason, for example, when the purge operation is performed under conditions where the temperature of the outdoor air is relatively high, the temperature of the refrigerant flowing through the adsorption heat exchanger increases. As a result, the pressure of the refrigerant on the high pressure side of the refrigerant circuit rises, for example, protection control is performed to reduce the high pressure, and the desired operation cannot be continued. For example, when the purge operation is performed under a condition where the humidity of the outdoor air is relatively low, the amount of moisture adsorbed by the adsorbent of the adsorption heat exchanger tends to be insufficient. For this reason, the operation time of the purge operation required to sufficiently desorb the odorous substance of the adsorbent becomes longer, and the operation time of the dehumidifying operation and the humidifying operation is shortened accordingly. As a result, the dehumidifying performance and the humidifying performance of the humidity control apparatus are impaired.

  This invention is made | formed in view of this point, The objective is to provide the humidity control apparatus which can perform a purge operation stably.

In the first invention, an adsorption heat exchanger (51, 52) carrying an adsorbent on the surface is provided, a refrigerant circuit (50) in which a refrigerant is circulated and a refrigeration cycle is performed, and the taken-in air is converted into the adsorption heat. Humidity adjustment operation that adjusts the humidity of the air by bringing it into contact with the adsorbent of the exchanger (51,52), and odorous substances are desorbed from the adsorbent of the adsorption heat exchanger (51,52) and discharged outside the room. And a control unit (60) for switching and executing the purge operation. In the humidity control apparatus, in the purge operation, the control unit (60) adsorbs moisture in the outdoor air taken in to the adsorbent of the adsorption heat exchanger (51, 52), and the odor from the adsorbent. The outdoor air purge operation that desorbs the substance and discharges it outside, and the moisture in the indoor air that has been taken in is adsorbed to the adsorbent of the adsorption heat exchanger (51, 52), and the odorous substance is desorbed from the adsorbent. The control unit (60) includes an outside air temperature detecting unit (99) that detects and switches the outside air purging operation to be discharged to the outside, and detects the temperature of the outside air. The control unit (60) includes the outside air temperature detecting unit ( the temperature of outdoor air detected in 99) is configured to so that to execute the high and the inside air purging operation than the predetermined temperature, the inside air humidity sensor for detecting the absolute humidity of the room air and the (96, 98), outdoor air The outdoor humidity detector (97,99) that detects the absolute humidity of And the control unit (60) detects the outdoor air temperature detected by the outside air temperature detection unit (99) lower than a predetermined temperature in the purge operation and is detected by the inside air humidity detection unit (96, 98). If the absolute humidity of the indoor air is lower than the absolute humidity of the outdoor air detected by the outdoor air humidity detector (97,99), the outdoor air purge operation is executed and the outdoor air temperature detected by the outdoor air temperature detector (99) is detected. The temperature of the air is lower than the predetermined temperature, and the absolute humidity of the indoor air detected by the indoor air humidity detector (96, 98) is lower than the absolute humidity of the outdoor air detected by the outdoor air humidity detector (97, 99). When it is high, the inside air purge operation is performed .

  In the humidity control apparatus of the first invention, a humidity control operation for adjusting the humidity of the air is performed. In the humidity control operation, for example, air passes through the adsorption heat exchanger (51, 52) operating as an evaporator. Thereby, moisture in the air is adsorbed by the adsorbent of the adsorption heat exchanger (51, 52), and the air is dehumidified. In the humidity control operation, for example, air passes through the adsorption heat exchanger (51, 52) operating as a condenser. Thereby, moisture is released into the air from the adsorbent of the adsorption heat exchanger (51, 52), and the air is humidified.

  In the humidity control apparatus, a purge operation is performed separately from the humidity control operation. In the purge operation of the present invention, the outside air purge operation and the inside air purge operation are switched by the control unit (60). In the outdoor air purge operation, the taken outdoor air is sent to the adsorption heat exchanger (51, 52), and moisture in the outdoor air is adsorbed by the adsorbent of the adsorption heat exchanger (51, 52). When the water content of the adsorbent increases in this way, the odorous substance adsorbed on the adsorbent is desorbed. The detached odor substance is released together with air to the outside.

  In the inside air purge operation, the taken room air is sent to the adsorption heat exchanger (51, 52), and moisture in the room air is adsorbed by the adsorbent of the adsorption heat exchanger (51, 52). When the water content of the adsorbent increases in this way, the odorous substance adsorbed on the adsorbent is desorbed. The detached odorous substance is discharged out of the room together with air.

  As described above, in the present invention, in addition to the outdoor air purge operation for deodorizing the adsorbent using outdoor air, the indoor air purge operation for deodorizing the adsorbent using indoor air is performed. For this reason, by performing this inside air purge operation, the odorous substance can be desorbed from the adsorption heat exchanger (51, 52) without being affected by fluctuations in the temperature and humidity of the outdoor air.

In the first invention, when the temperature of the outdoor air becomes higher than a predetermined temperature, the inside air purge operation is executed. That is, if the outdoor air purge operation is performed under conditions where the temperature of the outdoor air is relatively high, the temperature of the refrigerant flowing through the adsorption heat exchanger (51, 52) becomes excessively high due to the high temperature outdoor air. As a result, the pressure of the refrigerant on the high pressure side of the refrigerant circuit (50) may increase excessively, and the desired operation may not be continued. On the other hand, in the inside air purge operation, indoor air having a relatively low temperature is sent to the adsorption heat exchanger (51, 52). Accordingly, the odorous substance can be desorbed from the adsorption heat exchanger (51, 52) while suppressing an increase in the pressure of the refrigerant on the high pressure side of the refrigerant circuit (50).

In the first invention, when the temperature of the outdoor air is lower than the predetermined temperature and the absolute humidity of the outdoor air becomes higher than the absolute humidity of the indoor air, the outdoor air purge operation is performed. In this outdoor air purge operation, outdoor air having a relatively low temperature is sent to the adsorption heat exchanger (51, 52). For this reason, the rise in the pressure of the high-pressure refrigerant in the refrigerant circuit (50) is suppressed. In this outdoor air purge operation, outdoor air with relatively high humidity is sent to the adsorption heat exchanger (51, 52). For this reason, the water content of the adsorbent of the adsorption heat exchanger (51, 52) increases rapidly, and accordingly, the odorous substance is quickly desorbed from the adsorbent.

  In the present invention, when the temperature of the outdoor air is lower than the predetermined temperature and the absolute humidity of the indoor air becomes higher than the absolute humidity of the outdoor air, the indoor air purge operation is performed. In this inside air purge operation, indoor air with relatively high humidity is sent to the adsorption heat exchanger (51, 52). For this reason, the water content of the adsorbent of the adsorption heat exchanger (51, 52) increases rapidly, and accordingly, the odorous substance is quickly desorbed from the adsorbent. Further, the indoor air sent to the adsorption heat exchanger (51, 52) does not reach a higher temperature than the outdoor air. For this reason, the rise in the pressure of the high-pressure refrigerant in the refrigerant circuit (50) is also suppressed.

According to a second aspect of the present invention, in the first aspect of the present invention, the inside air purge operation causes the moisture in the taken room air to be adsorbed by the adsorbent of the adsorption heat exchanger (51, 52) and discharged to the outside, and the outdoor air is discharged. A first indoor air purge operation not supplied to the room, and a second air supply to the room at the same time as the moisture in the taken room air is adsorbed by the adsorbent of the adsorption heat exchanger (51, 52) and discharged to the outside. An outside air temperature detecting unit (99) for detecting the temperature of the outdoor air, and an inside air temperature detecting unit (98) for detecting the temperature of the room air. The control unit (60) In the inside air purging operation, the first inside air purging operation is performed when the temperature difference between the outdoor air temperature detected by the outside air temperature detecting unit (99) and the indoor air temperature detected by the inside air temperature detecting unit (98) is outside a predetermined range. When the temperature difference is within a predetermined range, Characterized in that to execute the second room air purge operation.

In the second invention, when the temperature difference between the outdoor air and the room air is within a predetermined range, the second room air purge operation is performed. In the second room air purge operation, room air is sent to the adsorption heat exchanger (51, 52), and room air containing the deodorized odor component is discharged to the outside of the room. At the same time, outdoor air is taken in and supplied indoors. That is, in the second indoor air purge operation, the ventilation operation is performed in which the outdoor air is supplied to the room at the same time as the indoor air is discharged to the outside of the room. For this reason, the indoor cleanliness is ensured and the indoor pressure is close to atmospheric pressure. The second inside air purge operation is performed under a condition where the temperature difference between the indoor air and the outdoor air is relatively small. For this reason, it is suppressed that indoor air-conditioning load (sensible heat load) increases resulting from supplying outdoor air indoors.

  When the temperature difference between the outdoor air and the indoor air is outside the predetermined range, the first indoor air purge operation is performed. In the first room air purge operation, room air is sent to the adsorption heat exchanger (51, 52), and room air containing desorbed odor components is discharged to the outside of the room. On the other hand, in the first room air purge operation, outdoor air is not supplied into the room unlike the second room air purge operation. For this reason, under the conditions where the temperature difference between the indoor air and the outdoor air is relatively large, the outdoor air is not supplied to the room and the indoor air conditioning load does not increase.

  According to the present invention, in addition to the outdoor air purge operation for desorbing odorous substances from the adsorption heat exchanger (51, 52) using the outdoor air, the odor from the adsorption heat exchanger (51, 52) using the indoor air. An inside air purge operation for desorbing a substance can be selectively performed. For this reason, for example, in a situation where the temperature of the outdoor air is extremely high or the outdoor air is extremely low, the odorous substance is reliably desorbed from the adsorption heat exchanger (51, 52) using the indoor air. be able to.

In the present invention, the inside air purge operation is performed when the temperature of the outdoor air is higher than a predetermined temperature. This prevents extremely high air from being sent to the adsorption heat exchanger (51, 52) and reliably prevents the refrigerant pressure on the high pressure side of the refrigerant circuit (50) from rising excessively. it can. Therefore, for example, the purge operation can be continued without performing protection control for lowering the high pressure of the refrigerant circuit (50).

Furthermore, in the present invention, the outdoor air purge operation is performed when the temperature of the outdoor air is lower than a predetermined temperature and the absolute humidity of the outdoor air is higher than the absolute humidity of the indoor air. For this reason, outdoor air with relatively low temperature and high humidity can be sent to the adsorption heat exchanger (51, 52), while avoiding an increase in the high pressure of the refrigerant circuit (50), and the adsorption heat exchanger ( 51,52) can increase the desorption rate of odorous substances. In the present invention, the indoor air purge operation is performed when the temperature of the outdoor air is lower than a predetermined temperature and the absolute humidity of the indoor air is higher than the absolute humidity of the outdoor air. For this reason, indoor air with relatively high humidity can be sent to the adsorption heat exchanger (51, 52), and the desorption rate of odorous substances in the adsorption heat exchanger (51, 52) can be increased.

In the second aspect of the invention, when the temperature difference between the outside air and the inside air is small in the inside air purge operation, the room air is sent to the adsorption heat exchanger (51, 52) to desorb the odorous substance, and this air is discharged outside the room. In addition, a second indoor air purge operation for supplying outdoor air into the room is performed. Thereby, indoor ventilation can be performed while removing the odorous substances from the adsorption heat exchanger (51, 52). Therefore, the comfort in the room can be improved and the negative pressure in the room can be avoided. Moreover, since the temperature difference between the outside air and the inside air is relatively small during the second inside air purge operation, the indoor air conditioning load does not increase so much.

FIG. 1 is a perspective view of the humidity control apparatus viewed from the front side with the top plate of the casing omitted. FIG. 2 is a perspective view showing the humidity control apparatus viewed from the front side, with a part of the casing and the electrical component box omitted. FIG. 3 is a plan view showing the humidity control apparatus with the top plate of the casing omitted. FIG. 4 is a schematic plan view, right side view, and left side view in which a part of the humidity control apparatus is omitted. FIG. 5 is a piping system diagram showing the configuration of the refrigerant circuit, in which FIG. 5 (A) shows the first normal operation, and FIG. 5 (B) shows the second normal operation. FIG. 6 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow in the first normal operation of the dehumidifying ventilation operation. FIG. 7 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow in the second normal operation of the dehumidifying ventilation operation. FIG. 8 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow in the first normal operation of the humidification ventilation operation. FIG. 9 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow in the second normal operation of the humidification ventilation operation. FIG. 10 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow in the simple ventilation operation. FIG. 11 is a schematic plan view, a right side view, and a left side view of the humidity control apparatus showing the air flow in the outside air purge operation. FIG. 12 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow in the first inside air purge operation. FIG. 13 is a flowchart showing the control operation of the controller in the second inside air purge operation. FIG. 14 is a flowchart showing the control operation of the controller in the purge operation. FIG. 15 is a flowchart showing the control operation of the controller in the purge operation of the reference embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The humidity control device (10) of the present embodiment performs indoor ventilation as well as indoor humidity adjustment. At the same time, the taken outdoor air (OA) is humidity-adjusted and supplied to the room. ) To the outside. An air conditioner (not shown) is also provided in the room that is the target of the humidity control apparatus (10). That is, in this room, the humidity in the room is adjusted by the humidity control device (10), and the temperature of the room is also adjusted by the air conditioner. That is, the humidity control apparatus (10) and the air conditioner constitute an air conditioning system that simultaneously processes indoor latent heat and sensible heat.

<Overall configuration of humidity control device>
The humidity control apparatus (10) will be described with reference to FIGS. Note that “upper”, “lower”, “left”, “right”, “front”, “rear”, “front”, and “rear” used in the description here are the humidity control device (10) from the front side unless otherwise stated. It means the direction when viewed.

  The humidity control device (10) includes a casing (11). A refrigerant circuit (50) is accommodated in the casing (11). The refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion valve (55). It is connected. Details of the refrigerant circuit (50) will be described later.

  The casing (11) is formed in a rectangular parallelepiped shape that is slightly flat and relatively low in height. In the casing (11) shown in FIG. 2, the left front side (ie, front) is the front panel (12), and the right back side (ie, back) is the back panel (13). Is the first side panel (14), and the left back side is the second side panel (15).

  The casing (11) is formed with an outside air suction port (24), an inside air suction port (23), an air supply port (22), and an exhaust port (21). The outside air inlet (24) and the inside air inlet (23) are open to the back panel (13). The outside air inlet (24) is disposed in the lower part of the back panel (13). The inside air suction port (23) is arranged in the upper part of the back panel (13). The air supply port (22) is disposed near the end of the first side panel (14) on the front panel (12) side. The exhaust port (21) is disposed near the end of the second side panel (15) on the front panel (12) side.

  The internal space of the casing (11) includes an upstream divider plate (71), a downstream divider plate (72), a central divider plate (73), a first divider plate (74), and a second divider plate ( 75). These partition plates (71 to 75) are all erected on the bottom plate of the casing (11), and divide the internal space of the casing (11) from the bottom plate of the casing (11) to the top plate. .

  The upstream divider plate (71) and the downstream divider plate (72) are parallel to the front panel portion (12) and the rear panel portion (13), and are spaced at a predetermined interval in the longitudinal direction of the casing (11). Has been placed. The upstream divider plate (71) is disposed closer to the rear panel portion (13). The downstream partition plate (72) is disposed closer to the front panel portion (12).

  The first partition plate (74) and the second partition plate (75) are installed in a posture parallel to the first side panel portion (14) and the second side panel portion (15). The first partition plate (74) is spaced a predetermined distance from the first side panel (14) so as to close the space between the upstream partition plate (71) and the downstream partition plate (72) from the right side. Has been placed. The second partition plate (75) is spaced from the second side panel (15) by a predetermined distance so as to close the space between the upstream partition plate (71) and the downstream partition plate (72) from the left side. Has been placed.

  The central partition plate (73) is disposed between the upstream partition plate (71) and the downstream partition plate (72) in a posture orthogonal to the upstream partition plate (71) and the downstream partition plate (72). Yes. The central partition plate (73) is provided from the upstream partition plate (71) to the downstream partition plate (72), and the space between the upstream partition plate (71) and the downstream partition plate (72) is left and right. It is divided into.

  In the casing (11), the space between the upstream partition plate (71) and the back panel (13) is divided into two upper and lower spaces, and the upper space forms the inside air passage (32). The lower space constitutes the outside air passage (34). The room air side passage (32) communicates with the room through a duct connected to the room air inlet (23). An inside air side filter (27), an inside air humidity sensor (96), and an inside air temperature sensor (98) are installed in the inside air passage (32). The outside air passage (34) communicates with the outdoor space via a duct connected to the outside air inlet (24). In the outside air passage (34), an outside air filter (28), an outside air humidity sensor (97), and an outside air temperature sensor (99) are installed. The inside air temperature sensor (98) and the outside air temperature sensor (99) are not shown in FIG.

  The indoor air humidity sensor (96) detects the relative humidity of the indoor air, and the outdoor air humidity sensor (97) detects the relative humidity of the outdoor air. The inside air temperature sensor (98) constitutes an inside air temperature detection unit that detects the temperature of indoor air, and the outside air temperature sensor (99) constitutes an outside air temperature detection unit that detects the temperature of outdoor air. Based on the temperature of the room air detected by the room air temperature sensor (98) and the relative humidity of the room air detected by the room air humidity sensor (96), the calculation unit of the controller (60), which will be described later, Calculate absolute humidity. That is, the inside air temperature sensor (98), the inside air humidity sensor (96), and the calculation unit (not shown) constitute an inside air humidity detection unit that detects the absolute humidity of the room air. Based on the outdoor air temperature detected by the outdoor air temperature sensor (99) and the outdoor air relative humidity detected by the outdoor air humidity sensor (97), the calculation unit of the controller (60) calculates the absolute humidity of the outdoor air. To do. That is, the outside air temperature sensor (99), the outside air humidity sensor (97), and the calculation unit (not shown) constitute an outside air humidity detection unit that detects the absolute humidity of the outdoor air.

  The space between the upstream divider plate (71) and the downstream divider plate (72) in the casing (11) is divided into left and right by the central divider plate (73), and is located on the right side of the central divider plate (73). The space constitutes the first heat exchanger chamber (37), and the space on the left side of the central partition plate (73) constitutes the second heat exchanger chamber (38). A first adsorption heat exchanger (51) is accommodated in the first heat exchanger chamber (37). The second adsorption heat exchanger (52) is accommodated in the second heat exchanger chamber (38). Moreover, although not shown in figure, the electric expansion valve (55) of a refrigerant circuit (50) is accommodated in the 1st heat exchanger chamber (37).

  Each adsorption heat exchanger (51, 52) constitutes an adsorption member for bringing the adsorbent into contact with air. Each adsorption heat exchanger (51, 52) has an adsorbent supported on the surface of a so-called cross fin type fin-and-tube heat exchanger, and is a rectangular thick plate or flat rectangular parallelepiped as a whole. It is formed in a shape. Each adsorption heat exchanger (51, 52) is placed in the heat exchanger chamber (37, 38) with its front and back surfaces parallel to the upstream partition plate (71) and downstream partition plate (72). It is erected. As the adsorbent supported on the adsorption heat exchanger (51, 52), zeolite, silica gel, or a mixture thereof is used.

  In the internal space of the casing (11), the space along the front surface of the downstream partition plate (72) is partitioned vertically, and the upper portion of the vertically partitioned space is the air supply side passage ( 31), and the lower part constitutes the exhaust side passage (33).

  The upstream partition plate (71) is provided with four open / close dampers (41 to 44). Each damper (41-44) is formed in the shape of a substantially horizontally long rectangle. Specifically, in a part (upper part) facing the room air passage (32) in the upstream partition (71), the first room air damper (41) is attached to the right side of the central partition (73). The second inside air damper (42) is attached to the left side of the central partition plate (73). Moreover, in the part (lower part) which faces an external air side channel | path (34) among upstream side partition plates (71), the 1st external air side damper (43) is attached to the right side rather than a center partition plate (73), A second outside air damper (44) is attached to the left side of the central partition plate (73).

  The downstream partition plate (72) is provided with four open / close dampers (45 to 48). Each damper (45-48) is formed in the shape of a substantially horizontally long rectangle. Specifically, in the part (upper part) facing the supply side passageway (31) in the downstream partition plate (72), the first supply side damper (45) is located on the right side of the central partition plate (73). The second air supply side damper (46) is attached to the left side of the central partition plate (73). Moreover, in the part (lower part) which faces an exhaust side channel | path (33) among downstream partition plates (72), the 1st exhaust side damper (47) is attached to the right side rather than a center partition plate (73), A second exhaust side damper (48) is attached to the left side of the central partition plate (73).

  In the casing (11), the space between the air supply side passage (31) and the exhaust side passage (33) and the front panel portion (12) is divided into left and right by the partition plate (77). The space on the right side of (77) constitutes the air supply fan chamber (36), and the space on the left side of the partition plate (77) constitutes the exhaust fan chamber (35).

  The air supply fan (26) is accommodated in the air supply fan chamber (36). The exhaust fan chamber (35) accommodates an exhaust fan (25). The supply fan (26) and the exhaust fan (25) are both centrifugal multiblade fans (so-called sirocco fans).

  Specifically, these fans (25, 26) include a fan rotor, a fan casing (86), and a fan motor (89). Although not shown, the fan rotor is formed in a cylindrical shape whose axial length is shorter than the diameter, and a large number of blades are formed on the peripheral side surface. The fan rotor is accommodated in the fan casing (86). In the fan casing (86), an inlet (87) is opened on one of the side surfaces (the side surface orthogonal to the axial direction of the fan rotor). Further, the fan casing (86) is formed with a portion that protrudes outward from the peripheral side surface, and an outlet (88) is opened at the protruding end of the portion. The fan motor (89) is attached to the side surface of the fan casing (86) opposite to the suction port (87). The fan motor (89) is connected to the fan rotor and rotationally drives the fan rotor.

  In the supply fan (26) and the exhaust fan (25), when the fan rotor is rotationally driven by the fan motor (89), air is sucked into the fan casing (86) through the suction port (87), and the fan Air in the casing (86) is blown out from the air outlet (88).

  In the air supply fan chamber (36), the air supply fan (26) is installed such that the suction port (87) of the fan casing (86) faces the downstream partition plate (72). The air outlet (88) of the fan casing (86) of the air supply fan (26) is attached to the first side panel (14) so as to communicate with the air supply port (22).

  In the exhaust fan chamber (35), the exhaust fan (25) is installed such that the suction port (87) of the fan casing (86) faces the downstream partition plate (72). Further, the air outlet (88) of the fan casing (86) of the exhaust fan (25) is attached to the second side panel (15) in a state of communicating with the exhaust port (21).

  The supply fan chamber (36) accommodates the compressor (53) and the four-way switching valve (54) of the refrigerant circuit (50). The compressor (53) and the four-way selector valve (54) are disposed between the air supply fan (26) and the partition plate (77) in the air supply fan chamber (36).

  In the casing (11), the space between the first partition (74) and the first side panel (14) forms a first bypass passage (81). The starting end of the first bypass passage (81) communicates only with the outside air passage (34) and is blocked from the inside air passage (32). The terminal end of the first bypass passage (81) is partitioned by the partition plate (78) from the air supply side passage (31), the exhaust side passage (33), and the air supply fan chamber (36). A first bypass damper (83) is provided in a portion of the partition plate (78) facing the supply fan chamber (36).

  In the casing (11), the space between the second partition (75) and the second side panel (15) constitutes a second bypass passage (82). The starting end of the second bypass passage (82) communicates only with the inside air passage (32) and is blocked from the outside air passage (34). The terminal end of the second bypass passage (82) is partitioned by the partition plate (79) from the air supply side passage (31), the exhaust side passage (33), and the exhaust fan chamber (35). A second bypass damper (84) is provided in a portion of the partition plate (79) facing the exhaust fan chamber (35).

  4, the first bypass passage (81), the second bypass passage (82), the first bypass damper (83), and the second bypass damper (84) are shown. Is omitted.

  In the front panel portion (12) of the casing (11), an electrical component box (90) is attached to the right side portion thereof. 2 and 4, the electrical component box (90) is omitted. The electrical component box (90) is a rectangular parallelepiped box, and the control board (91) and the power supply board (92) are accommodated therein. The control board (91) and the power supply board (92) are attached to the inner side surface of the side plate of the electrical component box (90) adjacent to the front panel portion (12) (that is, the back plate). A radiating fin (93) is provided in the inverter portion of the power supply substrate (92). The heat dissipating fin (93) protrudes from the back of the power supply board (92) and feeds through the back plate of the electrical component box (90) and the front panel (12) of the casing (11). The air fan chamber (36) is exposed (see FIG. 3).

<Configuration of refrigerant circuit>
As shown in FIG. 5, the refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion. It is a closed circuit provided with a valve (55). The refrigerant circuit (50) performs a vapor compression refrigeration cycle by circulating the filled refrigerant.

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

  The four-way switching valve (54) includes a first state (the state shown in FIG. 5A) in which the first port and the third port communicate with each other and the second port and the fourth port communicate with each other. These ports can be switched to the second state (the state shown in FIG. 5B) in which the second port and the fourth port communicate with each other and the second port and the third port communicate with each other.

  The compressor (53) is a hermetic compression in which a compression mechanism that compresses refrigerant and an electric motor that drives the compression mechanism are housed in one casing. When the frequency of the alternating current supplied to the electric motor of the compressor (53) (that is, the operating frequency of the compressor (53)) is changed, the rotational speed of the compression mechanism driven by the electric motor changes, and the compressor per unit time The amount of refrigerant discharged from (53) changes. That is, the compressor (53) is configured to have a variable capacity.

  In the refrigerant circuit (50), a pipe connecting the discharge side of the compressor (53) and the first port of the four-way switching valve (54) includes a high pressure sensor (101) and a discharge pipe temperature sensor (103). It is attached. The high pressure sensor (101) measures the pressure of the refrigerant discharged from the compressor (53). The discharge pipe temperature sensor (103) measures the temperature of the refrigerant discharged from the compressor (53).

  In the refrigerant circuit (50), a low pressure sensor (102) and a suction pipe temperature sensor (104) are connected to a pipe connecting the suction side of the compressor (53) and the second port of the four-way switching valve (54). And are attached. The low pressure sensor (102) measures the pressure of the refrigerant sucked into the compressor (53). The suction pipe temperature sensor (104) measures the temperature of the refrigerant sucked into the compressor (53).

  In the refrigerant circuit (50), a pipe temperature sensor (105) is attached to a pipe connecting the third port of the four-way switching valve (54) and the first adsorption heat exchanger (51). The pipe temperature sensor (105) is disposed in the vicinity of the four-way switching valve (54) in this pipe and measures the temperature of the refrigerant flowing in the pipe.

<Configuration of controller>
The humidity control device (10) is provided with a controller (60) as a control unit. In the humidity control apparatus (10) of the present embodiment, the microcomputer provided on the control board (91) constitutes the controller (60).

  The controller (60) receives the measured values of the inside air humidity sensor (96), the inside air temperature sensor (98), the outside air humidity sensor (97), and the outside air temperature sensor (99). Moreover, the measured value of each sensor (91, 92, ...) provided in the refrigerant circuit (50) is input to the controller (60). The controller (60) controls the operation of the humidity controller (10) based on these input measurement values.

  In the humidity control apparatus (10), a dehumidification ventilation operation, a humidification ventilation operation, a simple ventilation operation, and a purge operation, which will be described later, are switched by the control operation of the controller (60). In addition, the controller (60), during these operations, each damper (41-48), each fan (25, 26), compressor (53), electric expansion valve (55), and four-way switching valve (54) To control the operation.

  Furthermore, the controller (60) has three operations during the purge operation based on the detected values of the room air humidity sensor (96), the room temperature sensor (98), the room air humidity sensor (97), and the room temperature sensor (99). Control is performed so as to switch (outside air purge operation, first inside air purge operation, second inside air purge operation).

-Driving action-
The humidity control apparatus (10) of this embodiment selectively performs a dehumidification ventilation operation, a humidification ventilation operation, a simple ventilation operation, and a purge operation. This humidity control apparatus (10) performs dehumidification ventilation operation and humidification ventilation operation as normal operation.

<Dehumidification ventilation operation>
In the humidity control apparatus (10) during the dehumidification / ventilation operation, a first normal operation and a second normal operation, which will be described later, are alternately repeated at predetermined time intervals (for example, intervals of 3 to 4 minutes). During the dehumidifying ventilation operation, the first bypass damper (83) and the second bypass damper (84) are always closed.

  In the humidity control apparatus (10) during the dehumidification / ventilation operation, outdoor air is taken as first air from the outside air inlet (24) into the casing (11), and indoor air is taken from the inside air inlet (23) to the casing (11). It is taken in as second air.

  First, the first normal operation of the dehumidifying ventilation operation will be described. As shown in FIG. 6, during the first normal operation, the first inside air side damper (41), the first outside air side damper (43), the second air supply side damper (46), and the first exhaust side damper are provided. (47) is in the open state, and the second inside air damper (42), the first outside air damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are in the closed state. . In the refrigerant circuit (50) during the first normal operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 5A), and the first adsorption heat exchanger (51) is set. The second adsorption heat exchanger (52) serves as a condenser and serves as an evaporator.

  The first air that has flowed into the outside air passage (34) and passed through the outside air filter (28) flows into the second heat exchanger chamber (38) through the second outside air damper (44), and thereafter It passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), 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 (52) flows into the supply air passage (31) through the second supply air damper (46) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  On the other hand, the second air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the first heat exchanger chamber (37) through the first room air damper (41), Thereafter, it passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air given moisture in the first adsorption heat exchanger (51) flows into the exhaust side passage (33) through the first exhaust side damper (47) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  Next, the second normal operation of the dehumidifying ventilation operation will be described. As shown in FIG. 7, during the second normal operation, the second inside air side damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper are provided. (48) is in the open state, and the first inside air damper (41), the second outside air damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are in the closed state. . In the refrigerant circuit (50) during the second normal operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 5B), and the first adsorption heat exchanger (51) is The second adsorption heat exchanger (52) becomes an evaporator and becomes a condenser.

  The first air that has flowed into the outside air passage (34) and passed through the outside air filter (28) flows into the first heat exchanger chamber (37) through the first outside air damper (43), and thereafter Passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture in the first air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The first air dehumidified by the first adsorption heat exchanger (51) flows into the supply air passage (31) through the first supply air damper (45) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  On the other hand, the second air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the second heat exchanger chamber (38) through the second room air damper (42), Thereafter, it passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air given moisture in the second adsorption heat exchanger (52) flows into the exhaust side passage (33) through the second exhaust side damper (48) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

<Humidified ventilation operation>
In the humidity control apparatus (10) during the humidification ventilation operation, a first normal operation and a second normal operation, which will be described later, are alternately repeated at predetermined time intervals (for example, intervals of 3 to 4 minutes). During the humidification ventilation operation, the first bypass damper (83) and the second bypass damper (84) are always closed.

  In the humidity control apparatus (10) during the humidification ventilation operation, outdoor air is taken as second air from the outside air inlet (24) into the casing (11), and indoor air is taken from the inside air inlet (23) to the casing (11). It is taken in as 1st air in.

  First, the first normal operation of the humidified ventilation operation will be described. As shown in FIG. 8, during the first normal operation, the second inside air side damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper are provided. (48) is in the open state, and the first inside air damper (41), the second outside air damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are in the closed state. . In the refrigerant circuit (50) during the first normal operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 5A), and the first adsorption heat exchanger (51) is set. The second adsorption heat exchanger (52) serves as a condenser and serves as an evaporator.

  The first air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the second heat exchanger chamber (38) through the second room air damper (42), and then It passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), 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 deprived of moisture in the second adsorption heat exchanger (52) flows into the exhaust side passage (33) through the second exhaust side damper (48) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  On the other hand, the second air that flows into the outside air passage (34) and passes through the outside air filter (28) flows into the first heat exchanger chamber (37) through the first outside air damper (43), Thereafter, it passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air humidified by the first adsorption heat exchanger (51) flows through the first air supply damper (45) into the air supply passage (31) and passes through the air supply fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

  Next, the second normal operation of the humidified ventilation operation will be described. As shown in FIG. 9, during the second normal operation, the first inside air damper (41), the second outside air damper (44), the second air supply damper (46), and the first exhaust damper are provided. (47) is in the open state, and the second inside air damper (42), the first outside air damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are in the closed state. . In the refrigerant circuit (50) during the second normal operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 5B), and the first adsorption heat exchanger (51) is The second adsorption heat exchanger (52) becomes an evaporator and becomes a condenser.

  The first air that has flowed into the room air passage (32) and passed through the room air filter (27) flows into the first heat exchanger chamber (37) through the first room air damper (41), and then Passes through the first adsorption heat exchanger (51). In the first adsorption heat exchanger (51), moisture in the first air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The first air deprived of moisture by the first adsorption heat exchanger (51) flows into the exhaust side passage (33) through the first exhaust side damper (47) and passes through the exhaust fan chamber (35). It is discharged outside through the exhaust port (21).

  On the other hand, the second air that has flowed into the outside air passage (34) and passed through the outside air filter (28) flows into the second heat exchanger chamber (38) through the second outside air damper (44), Thereafter, it passes through the second adsorption heat exchanger (52). In the second adsorption heat exchanger (52), moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air. The second air humidified by the second adsorption heat exchanger (52) flows through the second supply air damper (46) into the supply air passage (31) and passes through the supply air fan chamber (36). Later, the air is supplied into the room through the air supply port (22).

<Simple ventilation operation>
During the simple ventilation operation, the humidity control device (10) supplies the outdoor air (OA) taken into the room as supplied air (SA) as it is, and at the same time, takes the indoor air (RA) taken as it is into the outdoor air (EA). To discharge. Here, the operation of the humidity control apparatus (10) during the simple ventilation operation will be described with reference to FIG.

  In the humidity control apparatus (10) during the simple ventilation operation, the first bypass damper (83) and the second bypass damper (84) are opened, and the first room air damper (41) and the second room air damper ( 42), a first external air damper (43), a second external air damper (44), a first air supply damper (45), a second air supply damper (46), a first exhaust air damper (47), And the 2nd exhaust side damper (48) will be in a closed state. Further, during the simple ventilation operation, the compressor (53) of the refrigerant circuit (50) is stopped.

  In the humidity control apparatus (10) during the simple ventilation operation, outdoor air is taken into the casing (11) from the outside air inlet (24). The outdoor air that has flowed into the outside air passage (34) through the outside air inlet (24) flows from the first bypass passage (81) through the first bypass damper (83) into the supply fan chamber (36). Then, the air is supplied into the room through the air supply port (22).

  Further, in the humidity control apparatus (10) during the simple ventilation operation, room air is taken into the casing (11) from the inside air suction port (23). The room air that has flowed into the inside air passage (32) through the inside air inlet (23) flows from the second bypass passage (82) through the second bypass damper (84) into the exhaust fan chamber (35). Then, it is discharged to the outside through the exhaust port (21).

<Purge operation>
In the humidity controller (10), a purge operation is performed to remove odorous substances from the adsorbent of the adsorption heat exchanger (51, 52). In this purge operation, the outdoor air purge operation for deodorizing the adsorbent of the adsorption heat exchanger (51, 52) using outdoor air and the adsorbent of the adsorption heat exchanger (51, 52) using indoor air are deodorized. It can be roughly divided into the inside air purge operation. Furthermore, the internal air purge operation can be classified into a first internal air purge operation and a second internal air purge operation, which will be described in detail later. In the purge operation (that is, the outside air purge operation, the first inside air purge operation, and the second inside air purge operation), a first desorption operation and a second desorption operation described later are performed at least once. The duration tp of the first detachment operation or the second detachment operation is set to a value longer than the continuation time of the first normal operation or the second normal operation (3 to 4 minutes in the present embodiment).

<Outside air purge operation>
As shown in FIG. 11, in the humidity control apparatus (10) during the external air purge operation, the first external air side damper (43), the second external air side damper (44), the first exhaust side damper (47), and the second The exhaust side damper (48) is in the open state, and the first inside air side damper (41), the second inside air side damper (42), the first air supply side damper (45), the second air supply side damper (46), The first bypass damper (83) and the second bypass damper (84) are closed. Further, in the humidity control apparatus (10) during the outside air purge operation, only the exhaust fan (25) is operated, and the supply fan (26) remains stopped. That is, during the outdoor air purge operation, outdoor air (OA) is taken into the casing (11), and this air is discharged outside the room as the first air.

  During the outside air purge operation, a part of the outdoor air that has flowed into the outside air passage (34) flows into the first heat exchanger chamber (37) through the first outside air damper (43), and the rest is the first. 2 It flows into the second heat exchanger chamber (38) through the outside air side damper (44). The air that has flowed into the first heat exchanger chamber (37) passes through the first adsorption heat exchanger (51), and then flows into the exhaust side passage (33) through the first exhaust side damper (47). The air that has flowed into the second heat exchanger chamber (38) passes through the second adsorption heat exchanger (52) and then flows into the exhaust side passage (33) through the second exhaust side damper (48). The air flowing into the exhaust side passage (33) flows into the exhaust fan chamber (35), and is discharged to the outside through the exhaust port (21).

  First, the first detachment operation will be described. In the refrigerant circuit (50) during the first desorption operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 5A), and the first adsorption heat exchanger (51) is the condenser. Thus, the second adsorption heat exchanger (52) becomes an evaporator. In the first adsorption heat exchanger (51), the refrigerant radiates heat to the outdoor air and condenses. In the second adsorption heat exchanger (52), moisture in the outdoor air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed to evaporate the refrigerant.

  During the first desorption operation, the capacity of the compressor (53) is adjusted such that the evaporation temperature of the refrigerant in the second adsorption heat exchanger (52) becomes the dew point temperature of the outdoor air, and the second adsorption heat exchanger ( The degree of opening of the electric expansion valve (55) is adjusted so that the degree of superheat of the refrigerant flowing out of 52) becomes a predetermined target value. The controller (60) controls the capacity of the compressor (53) and the opening of the electric expansion valve (55).

  Thus, during the first desorption operation, moisture in the air is adsorbed by the second adsorption heat exchanger (52). And immediately before the end of the first desorption operation, the moisture content of the second adsorption heat exchanger (52) (that is, the amount of moisture that can be adsorbed by the adsorption heat exchanger of the amount of moisture adsorbed by the adsorption heat exchanger) Ratio) to 90% or more. In the dehumidifying ventilation operation and the humidifying ventilation operation, the moisture content of the second adsorption heat exchanger (52) immediately before the end of the first normal operation is about 70%. Accordingly, the water content of the second adsorption heat exchanger (52) immediately before the end of the first desorption operation is larger than the water content of the second adsorption heat exchanger (52) immediately before the end of the first normal operation.

Here, since the humidity control apparatus (10) is for adjusting the humidity of the air, an adsorbent having a high ability to adsorb water (H ₂ O) is used there. In addition, since the amount of water vapor present in the air is very large compared to the amount of odorous substance, the partial pressure of water vapor in the air is very high compared to the partial pressure of odorous substance. Therefore, the adsorption power of the adsorption heat exchanger (51, 52) with respect to the adsorbent is higher in water than in odor substances.

  For this reason, when the water content of the second adsorption heat exchanger (52) is increased by the first desorption operation, water vapor having a strong adsorption power to the adsorbent is preferentially adsorbed by the adsorbent, and until then adsorbed by the adsorbent. Odorous substances such as ammonia that have been released are desorbed from the adsorbent. The odor substance desorbed from the second adsorption heat exchanger (52) flows together with the outdoor air passing through the second adsorption heat exchanger (52) and is discharged to the outside.

  Next, the second desorption operation will be described. In the refrigerant circuit (50) during the second desorption operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 5B), and the second adsorption heat exchanger (52) is the condenser. Thus, the first adsorption heat exchanger (51) becomes an evaporator. In the second adsorption heat exchanger (52), the refrigerant dissipates heat to the outdoor air and condenses. In the first adsorption heat exchanger (51), moisture in the outdoor air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed to evaporate the refrigerant.

  During the second desorption operation, the capacity of the compressor (53) is adjusted such that the evaporation temperature of the refrigerant in the first adsorption heat exchanger (51) becomes the dew point temperature of the outdoor air, and the first adsorption heat exchanger ( 51) The opening degree of the electric expansion valve (55) is adjusted so that the degree of superheat of the refrigerant flowing out from the refrigerant reaches a predetermined target value. The controller (60) controls the capacity of the compressor (53) and the opening of the electric expansion valve (55).

  Thus, during the second desorption operation, moisture in the air is adsorbed by the first adsorption heat exchanger (51). And just before the end of the second desorption operation, the moisture content of the first adsorption heat exchanger (51) becomes 90% or more. In the dehumidifying ventilation operation and the humidifying ventilation operation, the moisture content of the first adsorption heat exchanger (51) immediately before the end of the second normal operation is about 70%. Accordingly, the water content of the first adsorption heat exchanger (51) immediately before the end of the second desorption operation is greater than the water content of the first adsorption heat exchanger (51) immediately before the end of the first normal operation.

  As described above, the adsorption power of the adsorption heat exchanger (51, 52) with respect to the adsorbent is higher in water than in odor substances. For this reason, when the water content of the first adsorption heat exchanger (51) is increased by the second desorption operation, water vapor having a strong adsorption power to the adsorbent is preferentially adsorbed by the adsorbent, and until then adsorbed by the adsorbent. Odorous substances such as ammonia that have been released are desorbed from the adsorbent. The odor substance desorbed from the first adsorption heat exchanger (51) flows together with the outdoor air passing through the first adsorption heat exchanger (51) and is discharged to the outside.

<First inside air purge operation>
As shown in FIG. 12, in the humidity control apparatus (10) during the first room air purge operation, the first room air side damper (41), the second room air side damper (42), the first exhaust side damper (47), The second exhaust side damper (48) is opened, and the first outside air damper (43), the second outside air damper (44), the first air supply side damper (45), and the second air supply side damper (46). The first bypass damper (83) and the second bypass damper (84) are closed. Further, in the humidity control apparatus (10) during the first inside air purge operation, only the exhaust fan (25) is operated, and the air supply fan (26) remains stopped. That is, during the first inside air purge operation, the room air (RA) is taken into the casing (11), and this air is discharged outside the room as the first air. On the other hand, outdoor air (OA) is not supplied into the room during the first room air purge operation.

  During the first room air purge operation, part of the room air that has flowed into the room air side passage (32) flows into the first heat exchanger room (37) through the first room air side damper (41) and remains. Flows into the second heat exchanger chamber (38) through the second inside air damper (42). The air that has flowed into the first heat exchanger chamber (37) passes through the first adsorption heat exchanger (51), and then flows into the exhaust side passage (33) through the first exhaust side damper (47). The air that has flowed into the second heat exchanger chamber (38) passes through the second adsorption heat exchanger (52) and then flows into the exhaust side passage (33) through the second exhaust side damper (48). The air flowing into the exhaust side passage (33) flows into the exhaust fan chamber (35), and is discharged to the outside through the exhaust port (21).

  In the first inside air purge operation, the first desorption operation and the second desorption operation are performed in the same manner as the above-described outside air purge operation.

  That is, in the refrigerant circuit (50) during the first desorption operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 5A), and the first adsorption heat exchanger (51) is The second adsorption heat exchanger (52) serves as a condenser and serves as an evaporator. In the first adsorption heat exchanger (51), the refrigerant dissipates heat to the indoor air and condenses. In the second adsorption heat exchanger (52), moisture in the indoor air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed to evaporate the refrigerant. As a result, in the second adsorption heat exchanger (52), odorous substances such as ammonia are desorbed from the adsorbent. The odor substance desorbed from the second adsorption heat exchanger (52) is discharged to the outside together with the room air passing through the second adsorption heat exchanger (52).

  In the refrigerant circuit (50) during the second desorption operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 5B), and the second adsorption heat exchanger (52) is The first adsorption heat exchanger (51) becomes a condenser and becomes an evaporator. In the second adsorption heat exchanger (52), the refrigerant dissipates heat to the indoor air and condenses. In the first adsorption heat exchanger (51), moisture in the room air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed to evaporate the refrigerant. As a result, in the first adsorption heat exchanger (51), odorous substances such as ammonia are desorbed from the adsorbent. The odor substance desorbed from the first adsorption heat exchanger (51) is discharged to the outside together with the room air passing through the first adsorption heat exchanger (51).

<Second inside air purge operation>
As shown in FIG. 13, in the humidity control apparatus (10) during the second room air purge operation, the first room air side damper (41), the second room air side damper (42), the first exhaust side damper (47), 2 The exhaust side damper (48) and the first bypass damper (83) are opened, and the first outside air damper (43), the second outside air damper (44), the first air supply side damper (45), The 2 air supply side damper (46) and the second bypass damper (84) are closed. In the humidity control apparatus (10) during the second room air purge operation, both the exhaust fan (25) and the air supply fan (26) are operated. That is, during the second room air purge operation, room air (RA) is taken into the casing (11), and this air is discharged outside the room as the first air. At the same time, outdoor air (OA) is taken into the casing (11), and this air bypasses the adsorption heat exchanger (51, 52) and is supplied to the room as second air.

  During the second room air purge operation, part of the room air that has flowed into the room air side passage (32) flows into the first heat exchanger chamber (37) through the first room air side damper (41) and remains. Flows into the second heat exchanger chamber (38) through the second inside air damper (42). The air that has flowed into the first heat exchanger chamber (37) passes through the first adsorption heat exchanger (51), and then flows into the exhaust side passage (33) through the first exhaust side damper (47). The air that has flowed into the second heat exchanger chamber (38) passes through the second adsorption heat exchanger (52) and then flows into the exhaust side passage (33) through the second exhaust side damper (48). The air flowing into the exhaust side passage (33) flows into the exhaust fan chamber (35), and is discharged to the outside through the exhaust port (21).

  In the second inside air purge operation, the first desorption operation and the second desorption operation are performed in the same manner as the outside air purge operation and the first inside air purge operation described above. That is, in the refrigerant circuit (50) during the first desorption operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 5A), and the first adsorption heat exchanger (51) is The second adsorption heat exchanger (52) serves as a condenser and serves as an evaporator. In the first adsorption heat exchanger (51), the refrigerant dissipates heat to the indoor air and condenses. In the second adsorption heat exchanger (52), moisture in the indoor air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed to evaporate the refrigerant. As a result, in the second adsorption heat exchanger (52), odorous substances such as ammonia are desorbed from the adsorbent. The odor substance desorbed from the second adsorption heat exchanger (52) is discharged to the outside together with the room air passing through the second adsorption heat exchanger (52).

  In the refrigerant circuit (50) during the second desorption operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 5B), and the second adsorption heat exchanger (52) is The first adsorption heat exchanger (51) becomes a condenser and becomes an evaporator. In the second adsorption heat exchanger (52), the refrigerant dissipates heat to the indoor air and condenses. In the first adsorption heat exchanger (51), moisture in the outdoor air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed to evaporate the refrigerant. As a result, in the first adsorption heat exchanger (51), odorous substances such as ammonia are desorbed from the adsorbent. The odor substance desorbed from the first adsorption heat exchanger (51) is discharged to the outside together with the room air passing through the first adsorption heat exchanger (51).

  At the same time, outdoor air that has flowed into the outside air passage (34) during the second inside air purge operation passes through the first bypass passage (81) and the first bypass damper (83) to the supply fan chamber (36). Inflow. And the air which flowed into the air supply fan chamber (36) is supplied into the room through the air supply port (22). That is, in the second room air purge operation, the room air is exhausted to the outside of the room, and at the same time, the outdoor air is discharged to the room, so that the room is actively ventilated.

-Switching control operation during purge operation-
In the purge operation, the controller (60) switches and executes the above-described outside air purge operation, first inside air operation, and second inside air purge operation. This control operation will be described in detail with reference to the flowchart shown in FIG.

  The purge operation is basically automatically executed using a timer at night when the humidity control apparatus (10) is stopped. When the purge operation is started, the process proceeds to step ST1, and the operation mode of the purge operation is determined. In the humidity control apparatus (10), “automatic mode” and “fixed mode” can be selected as the purge operation settings. In the “fixed mode”, the “outside air purge operation”, “first inside air purge operation”, and “second inside air purge operation” can be selectively set. Therefore, when the “fixed mode” is set in step ST1, the set predetermined operation (that is, the outside air purge operation, the first inside air purge operation, or the second inside air purge) is forcibly executed. . On the other hand, if “automatic mode” is set in step ST1, the process proceeds to step ST2.

  In step ST2, the outdoor air temperature to detected by the outdoor temperature sensor (99) is compared with a predetermined set temperature ts1. This set temperature ts1 can be said to be the upper limit value of the outside air temperature for suppressing the pressure of the refrigerant on the high pressure side of the refrigerant circuit (50) to a predetermined value or less during the purge operation. In this embodiment, the set temperature ts1 is set to 30 ° C. If the outdoor temperature to is lower than the set temperature ts1 (= 30 ° C.) in step ST2, the process proceeds to step ST3.

  In step ST3, the absolute humidity hr of the indoor air is compared with the absolute humidity ho of the outdoor air. Here, the absolute humidity hr of the room air is calculated by calculating the relative humidity of the room air detected by the room air humidity sensor (96) and the temperature of the room air detected by the room temperature sensor (98) by the calculation unit of the controller (60). Is calculated based on The absolute humidity ho of the outdoor air is based on the relative humidity of the outdoor air detected by the outdoor air humidity sensor (97) and the temperature of the outdoor air detected by the outdoor air temperature sensor (99) by the calculation unit of the controller (60). Calculated. In step ST3, when the indoor absolute humidity hr is lower than the outdoor absolute humidity ho, the process proceeds to step ST4 and the above-described outdoor air purge operation is performed.

  The outdoor air purge operation of the present embodiment is executed under conditions where the outdoor temperature to is lower than the set temperature ts1. Thereby, in the outdoor air purge operation, outdoor air having a temperature lower than the set temperature ts1 passes through the adsorption heat exchanger (51, 52). For this reason, the temperature rise of the refrigerant | coolant which flows through an adsorption heat exchanger (51,52) can be suppressed, and it can prevent that the pressure of the refrigerant | coolant of the high voltage | pressure side of a refrigerant circuit (50) becomes high too much by extension. Therefore, during the outside air purge operation, protection control for limiting the high pressure to a predetermined value or less (for example, a control to keep the operating frequency of the compressor (53) below a predetermined value or to stop the compressor (53). ) Can be avoided in advance.

  Further, the outdoor air purging operation of the present embodiment is executed when the outdoor absolute humidity ho is higher than the indoor absolute humidity hr. Thereby, in the outdoor air purge operation, outdoor air with relatively high humidity can be supplied to the adsorption heat exchanger (51, 52). Therefore, in the outside air purge operation, the water content of the adsorbent of the adsorption heat exchanger (51, 52) can be quickly increased, and odorous substances can be quickly desorbed from the adsorbent.

  In step ST2, when the outdoor temperature to is higher than the set temperature ts1, the process proceeds to step ST5. In this case, one of the first room air purge operation (step ST6) and the second room air purge operation (step ST7) is performed via step ST5. In this situation, when any one of the inside air purge operations is performed, the outdoor temperature to becomes higher than 30 ° C. Under this circumstance, for example, the temperature of the room air-conditioned by the air conditioner is lower than the outdoor temperature. Therefore, in each inside air purge operation, it is possible to prevent the refrigerant pressure on the high pressure side of the refrigerant circuit (50) from rising by passing relatively low-temperature indoor air to the adsorption heat exchanger (51, 52). Can be avoided.

  Further, in step ST3, when the indoor absolute humidity hr is higher than the outdoor absolute humidity ho, either the first room air purge operation (step ST6) or the second room air purge operation (step ST7) is performed via step ST5. Either one is executed. In this situation, when any of the room air purge operations is performed, room air with relatively high humidity can be supplied to the adsorption heat exchanger (51, 52). Therefore, in each inside air purge operation, the water content of the adsorbent of the adsorption heat exchanger (51, 52) can be quickly increased, and odorous substances can be quickly desorbed from the adsorbent.

  Furthermore, in step ST5, the temperature between the outdoor air temperature to detected by the outdoor air temperature sensor (99) and the indoor air temperature tr detected by the indoor air temperature sensor (98) by the calculation unit of the controller (60). The difference (to-tr) is calculated. In step ST5, when this temperature difference (to-tr) is smaller than ts2 or larger than ts3 (that is, when the temperature difference (to-tr) is outside the range from ts2 to ts3), the process proceeds to step ST6. The first inside air purge operation is performed. In the present embodiment, ts2 that is the lower limit value of the temperature difference (to-tr) is set to −10 ° C., and ts3 that is the upper limit value of the temperature difference (to-tr) is set to + 5 ° C.

  The first inside air purging operation of the present embodiment is performed under a situation where the temperature difference (to-tr) between the outside air and the inside air is relatively large. Under these circumstances, if outdoor air is supplied indoors, the air conditioning load in the room will increase. However, since the outdoor air is not supplied indoors in the first indoor air purge operation, the adsorption heat exchanger (51, 52) can be deodorized without increasing the air conditioning load.

  On the other hand, in step ST5, when the temperature difference (to-tr) between the outside air and the inside air is larger than ts2 and smaller than ts3 (that is, when the temperature difference (to-tr) is within the range from ts2 to ts3), step The process proceeds to step ST7 where a second room air purge operation is performed.

  The second inside air purge operation is performed under a situation where the temperature difference (to-tr) between the outside air and the inside air is relatively small. For this reason, even if outdoor air is supplied indoors in the second indoor air purge operation, the indoor air conditioning load does not increase so much. Therefore, in the second room air purge operation, the odorous substance can be desorbed from the adsorption heat exchanger (51, 52) while ventilating the room.

  Although illustration in FIG. 14 is omitted, after the transition to each purge operation, the process returns to step ST1, and the switching of each operation of the purge operation is appropriately determined.

-Effect of the embodiment-
In the humidity control apparatus (10) of the above embodiment, the outside air purging operation and the inside air purging operation (more specifically, the first inside air purging operation and the second inside air purging operation) are performed according to the outdoor and indoor temperature conditions and humidity conditions. And switching. Therefore, the odorous substance can be stably desorbed from the adsorbent of the adsorption heat exchanger (51, 52) in accordance with these environmental changes.

  Specifically, when the outdoor temperature To is higher than a predetermined set temperature Ts1, the inside air purge operation (the first inside air purge operation or the second inside air purge operation) is performed. For this reason, in this situation, since the relatively low temperature indoor air passes through the adsorption heat exchanger (51, 52), it is possible to avoid an increase in the pressure of the refrigerant on the high pressure side of the refrigerant circuit (50). . As a result, for example, it is possible to avoid execution of control for limiting the operating frequency of the compressor (53) and control for stopping the compressor (53), and the desired purge operation can be continued. .

  In addition, when the outdoor temperature To is lower than the predetermined set temperature Ts1 and the indoor absolute humidity hr is higher than the outdoor absolute humidity ho, an indoor air purge operation (first indoor air purge operation or second indoor air purge operation) is performed. I am doing so. For this reason, in this situation, since the indoor air with relatively high humidity passes through the adsorption heat exchanger (51, 52), the water content of the adsorbent in the adsorption heat exchanger (51, 52) can be quickly increased. . Therefore, the desorption rate of the odorous substance released by substituting the adsorbed water is increased, and the time required for the purge operation can be shortened.

  When the outdoor temperature To is lower than the predetermined set temperature Ts1 and the outdoor absolute humidity ho is higher than the indoor absolute humidity hr, the outdoor air purge operation is performed. For this reason, under this situation, since outdoor air having a relatively low temperature passes through the adsorption heat exchanger (51, 52), it is possible to reliably prevent an increase in the pressure of the refrigerant on the high-pressure side of the refrigerant circuit (50). In this situation, since the outdoor air having relatively high humidity passes through the adsorption heat exchanger (51, 52), the water content of the adsorbent in the adsorption heat exchanger (51, 52) can be increased rapidly. Therefore, the desorption rate of the odorous substance released by substituting this water is increased, and the time required for the purge operation can be shortened.

  Furthermore, in step ST5, when the temperature difference (To-Tr) between the outside air and the inside air is within a predetermined range, the second inside air purging operation is performed to supply the outdoor air into the room. Thereby, indoor comfort can be positively performed and indoor comfort can be improved. It is also possible to avoid negative pressure (negative pressure) in the room. In addition, even when outdoor air is supplied indoors under such a relatively small temperature difference (To-Tr), the air conditioning load in the room does not increase so much. Therefore, energy saving performance of the air conditioning system can be secured.

《 Reference form》
In the purge operation of the humidity control apparatus (10) of the embodiment, when the outdoor temperature To is lower than the set temperature Ts1 in step ST2, the process proceeds to step ST3 to compare the absolute humidity of the outside air and the inside air. However, in the reference mode, for example, as shown in FIG. 15, step ST3 of the above embodiment is omitted . That is, in step ST2, when the outdoor temperature To is lower than the set temperature Ts1, the process directly proceeds to step ST4 to perform the outdoor air purge operation . Also in this case, since outdoor air lower than the set temperature Ts1 is supplied to the adsorption heat exchanger (51, 52), it is reliably avoided that the refrigerant pressure on the high pressure side of the refrigerant circuit (50) becomes excessively high. it can.

  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 that includes a refrigerant circuit provided with an adsorption heat exchanger, and conditioned air with an adsorbent of the adsorption heat exchanger.

10 Humidity control device
50 Refrigerant circuit
51 First adsorption heat exchanger (Adsorption heat exchanger)
52 Second adsorption heat exchanger (Adsorption heat exchanger)
60 Controller (Controller)
96 Ambient humidity sensor (Ambient humidity detector)
97 Outside air humidity sensor (outside air humidity detector)
98 Inside air temperature sensor (Inside air temperature detector, Inside air humidity detector)
99 Outside temperature sensor (outside temperature detector, outside humidity detector)

Claims (2)

An adsorption heat exchanger (51, 52) carrying an adsorbent on the surface, a refrigerant circuit (50) in which a refrigerant is circulated and a refrigeration cycle is performed;
Humidity adjustment operation that adjusts the humidity of the air by bringing the taken-in air into contact with the adsorbent of the adsorption heat exchanger (51, 52), and odorous substances from the adsorbent of the adsorption heat exchanger (51, 52). A controller (60) for switching and executing a purge operation for desorption and discharging to the outside, and a humidity control device comprising:
In the purge operation, the control unit (60) adsorbs moisture in the outdoor air taken in by the adsorbent of the adsorption heat exchanger (51, 52), desorbs odorous substances from the adsorbent, and moves outside. An outside air purging operation for discharging, an inside air purging operation for adsorbing moisture in the taken indoor air to the adsorbent of the adsorption heat exchanger (51, 52), desorbing odorous substances from the adsorbing agent and discharging it to the outside of the room Switch
It has an outdoor temperature detector (99) that detects the temperature of outdoor air,
The control unit (60) is in the purge operation, it is configured so that the temperature of the outdoor air detected by the outside air temperature detection unit (99) is to execute the high and the inside air purging operation than a predetermined temperature,
An indoor air humidity detector (96,98) that detects the absolute humidity of indoor air, and an outdoor air humidity detector (97,99) that detects the absolute humidity of outdoor air,
In the purge operation, the control unit (60) has an outdoor air temperature detected by the outside air temperature detection unit (99) lower than a predetermined temperature and is detected by the indoor air humidity detection unit (96, 98). If the absolute humidity of the air is lower than the absolute humidity of the outdoor air detected by the outdoor air humidity detector (97,99), the outdoor air purge operation is executed, and the outdoor air detected by the outdoor air temperature detector (99) When the temperature is lower than a predetermined temperature and the absolute humidity of the indoor air detected by the indoor air humidity detector (96,98) is higher than the absolute humidity of the outdoor air detected by the outdoor air humidity detector (97,99) A humidity control apparatus that performs the inside air purge operation . In claim 1 ,
The inside air purging operation is the same as the first inside air purging operation in which the moisture in the taken room air is adsorbed by the adsorbent of the adsorption heat exchanger (51, 52) and discharged to the outside, and the outside air is not supplied to the room. A second indoor air purging operation for adsorbing moisture in the indoor air to the adsorbent of the adsorption heat exchanger (51, 52) and discharging the outdoor air to the room at the same time,
With the inside air temperature detector for detecting the temperature of the chamber air and (98),
In the inside air purge operation, the control unit (60) detects that the difference between the temperature of the outdoor air detected by the outside air temperature detecting unit (99) and the temperature of the indoor air detected by the inside air temperature detecting unit (98) is outside a predetermined range. The humidity control apparatus is characterized in that the first inside air purge operation is executed when the temperature difference is within a predetermined range and the second inside air purge operation is executed when the temperature difference is within a predetermined range.

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