JP2009109089A - Humidity conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent condensation of moisture in outdoor-air to be supplied into a room in a humidity conditioner capable of performing humidity conditioning operation and simple ventilation operation. <P>SOLUTION: An outdoor-air conditioner (10), which is a humidity control device, is structured to perform simple ventilation operation. In the outdoor-air conditioner (10) in the simple ventilation operation, a first bypass damper (83) is opened, and outdoor-air taken into the outdoor-air conditioner (10) is supplied as it is into a room. When the indoor temperature becomes below the dew point temperature in the simple ventilation operation, operation of the outdoor-air conditioner (10) is forcibly switched from the simple ventilation operation to the dehumidification/ventilation operation. The outdoor-air conditioner (10) in the dehumidification/ventilation operation supplies the taken outdoor-air to an adsorption heat exchanger (51, 52) functioning as an evaporator, and the outdoor-air dehumidified by the adsorption heat exchanger (51, 52) is supplied into the room. In the dehumidification/ventilation operation, absolute humidity of the air supplied from the outdoor-air conditioner (10) to indoors becomes lower than that in the simple ventilation operation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a humidity control apparatus that adjusts air humidity and ventilates a room.

  2. Description of the Related Art Conventionally, a humidity control apparatus that performs an operation of dehumidifying outdoor air and supplying it to a room is known. Patent Document 1 discloses a humidity control apparatus including an adsorption heat exchanger having an adsorbent supported on its surface. This humidity control apparatus performs a so-called batch operation.

  Specifically, the humidity control device disclosed in Patent Document 1 is provided with a refrigerant circuit including two adsorption heat exchangers. The refrigerant circuit includes a first operation in which 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. The second operation in which the adsorption heat exchanger becomes an evaporator is alternately performed at predetermined time intervals. In the adsorption heat exchanger operating as an evaporator, moisture in the air is adsorbed by the adsorbent. In the adsorption heat exchanger operating 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, outdoor air that has passed through one of the first and second adsorption heat exchangers that operates as an evaporator is supplied to the room, and the indoor air that has passed through the one that operates as a condenser is It is discharged outside the room. Further, in the humidity control apparatus during the humidifying operation, the indoor air that has passed through the first and second adsorption heat exchangers that operate as an evaporator is discharged to the outside and the outdoor that has passed through the one that operates as a condenser. Air is supplied into the room.
JP 2006-078108 A

  As described above, the humidity control apparatus described in Patent Document 1 performs an operation of supplying outdoor air after adjusting the humidity of outdoor air. Here, in the intermediate period such as spring or autumn, even if the outdoor air is supplied to the room without adjusting the humidity, the indoor comfort may not be impaired. It is useless. However, since it is necessary to ventilate the room throughout the year, it is necessary to continue supplying outdoor air into the room.

  In order to meet such a demand, the humidity control apparatus not only adjusts humidity of the outdoor air but also adjusts the humidity of the outdoor air (that is, dehumidifying operation or humidifying operation) to supply the indoor air. It is conceivable that the simple ventilation operation for supplying the air to the room as it is can be executed. In that case, if switching between humidity control operation and simple ventilation operation is performed only based on the user's switch operation etc., simple ventilation operation will continue to be executed even though it is desirable to perform humidity control operation. Is also envisaged. And if simple ventilation operation is performed in a situation where the humidity of the outdoor air is high, there is a risk that moisture in the outdoor air may condense at the part where the temperature is almost the same as the indoor air temperature or at the outlet, etc. There is a possibility of causing troubles such as failure or water condensed at the air outlet falling into the room.

  The present invention has been made in view of such a point, and an object of the present invention is to condense moisture in outdoor air supplied indoors in a humidity control apparatus capable of performing humidity control operation and simple ventilation operation. Is to prevent.

  The first invention is directed to a humidity control apparatus. And the dehumidification ventilation operation which is provided with the humidity control means (50,115,170) which dehumidifies at least air, dehumidifies the taken outdoor air with the said humidity control means (50,115,170), and supplies it indoors, and the said humidity control means (50,115,170) It is configured to be able to perform simple ventilation operation in which outdoor air that has been taken in after being stopped is supplied to the room as it is, while indoor temperature detecting means (98) for detecting the indoor air temperature and detecting the dew point temperature of the outdoor air The outdoor dew point temperature detecting means (65) and the indoor air temperature detected by the indoor temperature detecting means (98) during the simple ventilation operation are detected by the outdoor dew point temperature detecting means (65). The control means (64) forcibly switching from the simple ventilation operation to the dehumidification ventilation operation is further provided.

  In the first invention, the dehumidifying ventilation operation and the simple ventilation operation are performed in the humidity control apparatus (10). Here, the moisture in the outdoor air is condensed when the outdoor air touches a portion lower than the dew point temperature of the outdoor air. For this reason, when the indoor air temperature becomes lower than the dew point temperature of the outdoor air, moisture in the outdoor air is condensed at a portion that is substantially equal to the indoor air temperature (for example, an air outlet opening in the room).

  Therefore, the control means (64) according to the first aspect of the invention controls the operation performed by the humidity controller (10) from the simple ventilation operation to the dehumidification ventilation when the room temperature becomes lower than the dew point temperature of the outdoor air during the simple ventilation operation. Forcibly switch to operation. In the dehumidifying ventilation operation, the outdoor air is dehumidified by the humidity control means (50, 115, 170) and then supplied to the room. The outdoor air after dehumidification has a lower absolute humidity than the outdoor air before dehumidification, and the dew point temperature is also lower than that before dehumidification. For this reason, even if the room temperature is lower than the dew point temperature of the outdoor air, the dew point temperature of the dehumidified outdoor air supplied to the room during the dehumidification ventilation operation is lower than the room temperature. There is no condensation of moisture in the outdoor air.

  In a second aspect based on the first aspect, the control means (64) is configured to detect the indoor temperature detection means (98) during the simple ventilation operation performed in a state where the dehumidification ventilation operation is prohibited. When the indoor air temperature detected by the above is lower than the dew point temperature of the outdoor air detected by the outdoor dew point temperature detecting means (65), the supply of the outdoor air to the room is stopped.

  Here, in the humidity control apparatus (10), the dehumidification ventilation operation may be prohibited. For example, when the humidity control means (50, 115, 170) does not operate normally due to a failure or the like, the dehumidifying ventilation operation is prohibited. On the other hand, the simple ventilation operation can be executed even when the humidity control means (50, 115, 170) does not operate normally. In such a case, in the humidity control apparatus (10), the simple ventilation operation is performed in a state where the dehumidification ventilation operation is prohibited.

  Even during simple ventilation operation that is performed in a state where dehumidification ventilation operation is prohibited, if the indoor air temperature becomes lower than the dew point temperature of the outdoor air, it will be outdoors at a portion that is approximately equal to the indoor air temperature (for example, an air outlet opening in the room). Water in the air will condense. However, in this case, since dehumidification ventilation operation is prohibited, dew condensation cannot be prevented by switching the operation of the humidity control apparatus (10) from simple ventilation operation to dehumidification ventilation operation. Therefore, in this case, the control means (64) of the second aspect of the invention stops the supply of outdoor air to the room in order to prevent moisture in the outdoor air from condensing.

  According to a third invention, in the first or second invention, the humidity control means (50, 115) includes an adsorption unit (51, 52, 111, 112) having an adsorbent and contacting the adsorbent with air, It is configured to dehumidify air by adsorbing moisture in the adsorption unit (51, 52, 111, 112).

  In the third invention, the adsorption unit (51, 52, 111, 112) is provided in the humidity control means (50, 115). During the dehumidifying ventilation operation, the humidity control means (50, 115) brings outdoor air into contact with the adsorbent of the adsorption unit (51, 52, 111, 112), and adsorbs moisture in the outdoor air to the adsorption unit (51, 52, 111, 112).

  In a fourth aspect based on the third aspect, the humidity control means includes an adsorption heat exchanger (51, 52) having an adsorbent supported on the surface as the adsorption unit, and the adsorption heat exchanger ( 51, 52) is connected to perform a refrigeration cycle (50), and the refrigerant circuit (50) cools the adsorbent of the adsorption heat exchanger (51, 52) with a refrigerant. An adsorption operation for adsorbing moisture in the air to the adsorption heat exchanger (51, 52), and the adsorption heat exchanger (51, 52) by heating the adsorbent of the adsorption heat exchanger (51, 52) with a refrigerant And a playback operation for playing back the video.

  In 4th invention, a refrigerant circuit (50) is provided in a humidity control means. Adsorption heat exchangers (51, 52) constituting an adsorption unit are connected to the refrigerant circuit (50). The refrigerant circuit (50) performs an adsorption operation and a regeneration operation. In the adsorption heat exchanger (51, 52) during the adsorption operation, moisture in the air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is taken away by the refrigerant. In the adsorption heat exchanger (51, 52) during the regeneration operation, moisture is desorbed from the adsorbent heated by the refrigerant. The refrigerant circuit (50) of the present invention may selectively perform an adsorption operation and a regeneration operation for only one adsorption heat exchanger, or two adsorption heat exchangers connected. The adsorption operation for one of the two and the regeneration operation for the other may be performed simultaneously in parallel.

  In the humidity control apparatus (10) of the present invention, when the indoor air temperature becomes lower than the dew point temperature of the outdoor air during the simple ventilation operation, the control means (64) changes the operation state of the humidity control apparatus (10) from the simple ventilation operation. Forcibly switch to dehumidified ventilation. Therefore, it is possible to prevent the simple ventilation operation from being continued in a situation where the indoor air temperature is lower than the dew point temperature of the outdoor air, and in such a situation, the operation of the humidity control device (10) It can be changed to a dehumidifying ventilation operation in which air is supplied into the room. Therefore, according to the present invention, it is possible to prevent moisture in the outdoor air from condensing during the simple ventilation operation, and it is possible to prevent troubles such as a failure due to condensation or a fall of the condensed water into the room. .

  In the second aspect of the invention, if the room temperature becomes lower than the dew point temperature of the outdoor air during the simple ventilation operation performed in a state where the dehumidification ventilation operation is prohibited, the control means (64) causes the outdoor air to enter the room. The supply is stopped. Therefore, according to the present invention, it is possible to reliably prevent moisture in the outdoor air from condensing even in a situation where the dehumidifying ventilation operation cannot be performed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The outdoor air conditioner (10) of the present embodiment performs indoor ventilation as well as indoor humidity adjustment, and constitutes a humidity control device. The outdoor air conditioner (10) adjusts the humidity of the taken outdoor air (OA) into the room and simultaneously discharges the taken indoor air (RA) to the outside.

<Overall air conditioner configuration>
The outside air conditioner (10) will be described with reference to FIGS. Unless otherwise specified, “up”, “down”, “left”, “right”, “front”, “rear”, “front”, and “back” used in the description here are those for the outdoor air conditioner (10) from the front side. It means the direction when viewed.

  The outdoor air conditioner (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. 1, 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 room air humidity sensor (96) measures the relative humidity of the room air flowing into the room air side passage (32). The room air temperature sensor (98) measures the temperature of the room air flowing into the room air side passage (32). This room temperature sensor (98) constitutes a room temperature detection means for detecting the room temperature. The outside air humidity sensor (97) measures the relative humidity of the outdoor air that has flowed into the outside air passage (34). The outside air temperature sensor (99) measures the temperature of the outdoor air that has flowed into the outside air passage (34). This outdoor temperature sensor (99) constitutes an outdoor temperature detecting means for detecting the outdoor air temperature.

  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) 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) constitutes an adsorption unit for bringing the adsorbent into contact with air. 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.

  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). The air supply fan (26) blows out the air sucked from the downstream side partition plate (72) side to the air supply port (22). The exhaust fan (25) blows out the air sucked from the downstream partition plate (72) side to 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).

  In the right side view and the left side view of FIG. 2, 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.

<Configuration of refrigerant circuit>
As shown in FIG. 3, 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. The refrigerant circuit (50) constitutes humidity control means.

  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 (state shown in FIG. 3A) 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. The second port and the fourth port can communicate with each other, and the second port and the third port can communicate with each other in the second state (the state shown in FIG. 3B).

  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 (91), a discharge pipe temperature sensor (93), Is attached. The high pressure sensor (91) measures the pressure of the refrigerant discharged from the compressor (53). The discharge pipe temperature sensor (93) measures the temperature of the refrigerant discharged from the compressor (53).

  In the refrigerant circuit (50), a pipe connecting the suction side of the compressor (53) and the second port of the four-way switching valve (54) includes a low pressure sensor (92) and a suction pipe temperature sensor (94). ) And are attached. The low pressure sensor (92) measures the pressure of the refrigerant sucked into the compressor (53). The suction pipe temperature sensor (94) measures the temperature of the refrigerant sucked into the compressor (53).

  In the refrigerant circuit (50), a pipe temperature sensor (95) 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 (95) 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 outside air conditioner (10) is provided with a controller (60). Although omitted in FIGS. 1 and 2, an electrical component box is attached to the front panel (12) of the casing (11), and a control board accommodated in the electrical component box controls the controller (60). It is composed.

  As shown in FIG. 9, the controller (60) includes an outdoor absolute humidity calculation unit (61), an outdoor air dew point temperature calculation unit (62), an operation command input unit (63), and a ventilation control unit (64). Is provided. The controller (60) receives the measured values of the room air humidity sensor (96), the room air temperature sensor (98), the room air humidity sensor (97), and the room temperature sensor (99). Furthermore, 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 outdoor air conditioner (10) based on these input measurement values.

  The outdoor air absolute humidity calculation unit (61) calculates the absolute humidity of the outdoor air using the relative humidity of the outdoor air measured by the outdoor air humidity sensor (97) and the temperature of the outdoor air measured by the outdoor air temperature sensor (99). calculate. On the other hand, the outdoor air dew point temperature calculation unit (62) calculates the dew point temperature of the outdoor air using the absolute humidity of the outdoor air calculated by the outdoor air absolute humidity calculation unit (61). Thus, in the outside air conditioner (10) of this embodiment, the outside air humidity sensor (97), the outside air temperature sensor (99), the outside air absolute humidity calculating unit (61), and the outside air dew point temperature calculating unit (62). Constitutes outdoor dew point temperature detecting means (65).

  A command signal is input from the user to the operation command input unit (63) through a remote controller or the like. In the outdoor air conditioner (10) of the present embodiment, four operation modes (dehumidification mode, humidification mode, humidity adjustment mode, and ventilation mode) can be selected. In principle, only the dehumidification ventilation operation described later is performed in the dehumidification mode, only the humidification ventilation operation described later is performed in the humidification mode, and only the simple ventilation operation described later is performed in the ventilation mode. In principle, in the humidity control mode, one of the dehumidifying ventilation operation and the humidifying ventilation operation is automatically selected and performed. When the user selects one of the four operation modes by operating the remote controller or the like, a command signal corresponding to the selected operation mode is input to the operation command input unit (63). The controller (60) controls the operations of the dampers (41 to 48) and the like so that the operation mode corresponding to the command signal input to the operation command input unit (63) is performed in the outdoor air conditioner (10).

  The ventilation control unit (64) performs an operation of forcibly switching the operation of the outdoor air conditioner (10) to one of the dehumidification ventilation operation and the humidification ventilation operation when a predetermined condition is satisfied. The ventilation control unit (64) performs an operation for forcibly stopping the air supply fan (26) when a predetermined condition is satisfied during the simple ventilation operation. Thus, the ventilation control part (64) comprises the control means. Detailed control operation of the ventilation control unit (64) will be described later.

-Driving action-
The outdoor air conditioner (10) of the present embodiment selectively performs a dehumidifying ventilation operation, a humidifying ventilation operation, and a simple ventilation operation. The outdoor air conditioner (10) during dehumidification ventilation operation or humidification ventilation operation adjusts the humidity of the taken outdoor air (OA) to the room as supply air (SA), and at the same time takes in the indoor air (RA). To the outside as exhaust air (EA). On the other hand, the outdoor air conditioner (10) during simple ventilation operation supplies the taken outdoor air (OA) as it is to the room as supply air (SA), and at the same time discharges the taken indoor air (RA) as it is as exhaust air (EA). To be discharged outside the room.

<Dehumidification ventilation operation>
In the outdoor air conditioner (10) during the dehumidifying ventilation operation, a first operation and a second operation described later are alternately repeated at a predetermined time interval (for example, every 3 minutes). During the dehumidifying ventilation operation, the first bypass damper (83) and the second bypass damper (84) are always closed.

  In the outside air conditioner (10) during the dehumidifying ventilation operation, the outdoor air is taken as the first air from the outside air inlet (24) into the casing (11), and the room air is taken from the inside air inlet (23) to the casing (11). It is taken in as second air.

  First, the first operation of the dehumidifying ventilation operation will be described. As shown in FIG. 4, during the first operation, the first inside air damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper ( 47) is opened, 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 closed. In the refrigerant circuit (50) during the first operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 3A), and the first adsorption heat exchanger (51) is condensed. The second adsorption heat exchanger (52) becomes an evaporator. That is, in the refrigerant circuit (50), the regeneration operation for the first adsorption heat exchanger (51) and the adsorption operation for the second adsorption heat exchanger (52) are simultaneously performed in parallel.

  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 operation of the dehumidifying ventilation operation will be described. As shown in FIG. 5, during this second 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 ( 48) is opened, and the first inside air damper (41), second outside air damper (44), second air supply damper (46), and first exhaust damper (47) are closed. In the refrigerant circuit (50) during the second operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 3B), and the first adsorption heat exchanger (51) is evaporated. The second adsorption heat exchanger (52) becomes a condenser. That is, in the refrigerant circuit (50), the adsorption operation for the first adsorption heat exchanger (51) and the regeneration operation for the second adsorption heat exchanger (52) are simultaneously performed in parallel.

  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 outdoor air conditioner (10) during the humidification ventilation operation, a first operation and a second operation described later are alternately repeated at a predetermined time interval (for example, every 4 minutes). During the humidification ventilation operation, the first bypass damper (83) and the second bypass damper (84) are always closed.

  In the outdoor air conditioner (10) during the humidified ventilation operation, outdoor air is taken as second air from the outdoor air inlet (24) into the casing (11), and indoor air is transferred from the indoor air inlet (23) to the casing (11). It is taken in as 1st air in.

  First, the 1st operation | movement of humidification ventilation operation is demonstrated. As shown in FIG. 6, during the first 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 ( 48) is opened, and the first inside air damper (41), second outside air damper (44), second air supply damper (46), and first exhaust damper (47) are closed. In the refrigerant circuit (50) during the first operation, the four-way switching valve (54) is set to the first state (the state shown in FIG. 3A), and the first adsorption heat exchanger (51) is condensed. The second adsorption heat exchanger (52) becomes an evaporator. That is, in the refrigerant circuit (50), the regeneration operation for the first adsorption heat exchanger (51) and the adsorption operation for the second adsorption heat exchanger (52) are simultaneously performed in parallel.

  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 operation of the humidification ventilation operation will be described. As shown in FIG. 7, during the second operation, the first inside air damper (41), the second outside air damper (44), the second air supply damper (46), and the first exhaust damper ( 47) is opened, 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 closed. In the refrigerant circuit (50) during the second operation, the four-way switching valve (54) is set to the second state (the state shown in FIG. 3B), and the first adsorption heat exchanger (51) is evaporated. The second adsorption heat exchanger (52) becomes a condenser. That is, in the refrigerant circuit (50), the adsorption operation for the first adsorption heat exchanger (51) and the regeneration operation for the second adsorption heat exchanger (52) are simultaneously performed in parallel.

  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>
The operation of the outside air conditioner (10) during the simple ventilation operation will be described with reference to FIG.

  In the outdoor air conditioner (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 outside air conditioner (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 outside air conditioner (10) during the simple ventilation operation, the indoor air is taken into the casing (11) from the inside air inlet (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).

-Controller control action-
The control operation performed by the ventilation control unit (64) of the controller (60) will be described. The ventilation control unit (64) includes an indoor air temperature Tr measured by the indoor air temperature sensor (98), an outdoor air temperature To measured by the outdoor air temperature sensor (99), and an outdoor air dew point temperature calculation unit (62). The dew point temperature Todew of the outdoor air calculated in the above is input.

  As described above, in the state in which the ventilation operation mode is selected, the simple ventilation operation is performed, and the outdoor air taken into the casing (11) is supplied to the room as it is. However, if the simple ventilation operation is performed in a situation where the temperature difference between the outdoor and indoors is large, outdoor air whose temperature is significantly different from the indoor air temperature is supplied to the room as it is, which may cause discomfort to the occupants. There is.

  Further, if the simple ventilation operation is performed in a state where the humidity of the outdoor air is high, moisture in the outdoor air may be condensed in the process of reaching the indoor space through the internal space of the casing (11). That is, the temperature of the portion of the casing (11) through which room air flows is substantially equal to the room temperature. In addition, the air inlet (22) of the casing (11) is connected to, for example, an anemo (anemostat type) air outlet through a duct. The air outlet is installed on the ceiling surface and exposed to the room. The temperature is almost equal to the room temperature. In a situation where the indoor air temperature is lower than the dew point temperature of the outdoor air, when the outdoor air touches a portion that is approximately equal to the indoor air temperature, moisture in the outdoor air is condensed at that portion. And if moisture in the outdoor air is condensed, the condensed water enters into the parts housed in the casing (11) and may cause a failure, or the condensed water falls into the room from the air outlet and soils indoor items. There is a risk of

  Therefore, the ventilation control unit (64) of the controller (60) prohibits the simple ventilation operation when a predetermined condition is satisfied in order to avoid the above problem in the state where the ventilation operation mode is selected. Then, a control operation is performed to limit the operation of the outdoor air conditioner (10) to only one of the dehumidification ventilation operation and the humidification ventilation operation. Here, this control operation will be described with reference to FIG.

  In the ventilation control unit (64), four switching conditions are set. The first switching condition is “a condition that the indoor air temperature Tr is lower than the dew point temperature Todew of the outdoor air (Tr <Todew) and a condition that the outdoor air temperature To is higher than 35 ° C. (To> 35 ° C.). This is a condition that “at least one of them is true”. The second switching condition is a condition that “the operation mode set by the user is one of the ventilation operation mode and the humidification operation mode”. The third switching condition is a condition that “the outdoor air temperature To is lower than 5 ° C. (To <5 ° C.)”. The fourth switching condition is a condition that “the operation mode set by the user is one of the ventilation operation mode and the humidification operation mode”.

  In a state where the simple ventilation operation is not prohibited, when both the first switching condition and the second switching condition are satisfied, or when both the third switching condition and the fourth switching condition are satisfied, The ventilation control unit (64) prohibits the simple ventilation operation and restricts the operation of the outdoor air conditioner (10) to only one of the dehumidification ventilation operation and the humidification ventilation operation. Specifically, when both the first switching condition and the second switching condition are satisfied, the ventilation control unit (64) limits the operation of the outdoor air conditioner (10) to the dehumidifying ventilation operation. In addition, when both the third switching condition and the fourth switching condition are satisfied, the ventilation control unit (64) limits the operation of the outdoor air conditioner (10) to the humidified ventilation operation.

  When the first switching condition is satisfied during the simple ventilation operation, outdoor air having a temperature higher than 35 ° C. or outdoor air having a dew point temperature higher than the indoor air temperature is supplied to the room as it is. In addition, when the first switching condition is satisfied during the humidification ventilation operation, the outdoor heat having a temperature higher than 35 ° C. or the outdoor air having a dew point temperature higher than the indoor air temperature operates as a condenser. After passing through the vessel (51, 52), it is supplied into the room.

  Therefore, when both the first switching condition and the second switching condition are satisfied, the ventilation control unit (64) changes the operation of the outdoor air conditioner (10) from the simple ventilation operation or the humidification ventilation operation to the dehumidification ventilation operation. And forcibly switch. In the dehumidifying ventilation operation, outdoor air dehumidified and cooled by the adsorption heat exchanger (51, 52) operating as an evaporator is supplied into the room. That is, both the absolute humidity and temperature of the air supplied to the room are lower than during simple ventilation operation or humidification ventilation operation. For this reason, the difference between the temperature of the air supplied into the room from the outside air conditioner (10) and the room temperature is reduced, and the uncomfortable feeling of the occupants is reduced. Further, since the dew point temperature of the air supplied from the outdoor air conditioner (10) to the room is higher than the room temperature, moisture in the outdoor air is not condensed during the process from the casing (11) to the room.

  On the other hand, when the third switching condition is satisfied during the simple ventilation operation, outdoor air having a temperature lower than 5 ° C. is supplied to the room as it is. When the first switching condition is satisfied during the dehumidifying ventilation operation, outdoor air having a temperature lower than 5 ° C. passes through the adsorption heat exchanger (51, 52) operating as an evaporator and then enters the room. Will be supplied.

  Therefore, when the third switching condition is satisfied, the ventilation control unit (64) forcibly switches the operation of the outdoor air conditioner (10) from the simple ventilation operation or the dehumidification ventilation operation to the humidification ventilation operation. In the humidified ventilation operation, outdoor air humidified and heated by the adsorption heat exchanger (51, 52) operating as a condenser is supplied into the room. That is, the temperature of the air supplied to the room rises compared to during simple ventilation operation or dehumidification ventilation operation. For this reason, the difference between the temperature of the air supplied into the room from the outside air conditioner (10) and the room temperature is reduced, and the uncomfortable feeling of the occupants is reduced.

  In the ventilation control unit (64), one operation return condition is set. The operation return condition is “a condition that the indoor air temperature Tr is 5 ° C. or more higher than the dew point temperature Todew of the outdoor air (Tr ≧ Todew + 5), a condition that the outdoor air temperature To is 30 ° C. or less (To ≦ 30 ° C.), And the condition that the outdoor air temperature To is 10 ° C. or higher (To ≧ 10 ° C.) is satisfied ”.

  When the operation return condition is satisfied with the operation of the outdoor air conditioner (10) restricted to either the dehumidification ventilation operation or the humidification ventilation operation, the ventilation control unit (64) operates the outdoor air conditioner (10). Return to the operation before the limit. In other words, when the operation of the outdoor air conditioner (10) is forcibly switched from simple ventilation operation to dehumidification ventilation operation or humidification ventilation operation, the ventilation controller (64) dehumidifies the operation of the outdoor air conditioner (10). Return from ventilation or humidification ventilation to simple ventilation. In addition, when the operation of the outdoor air conditioner (10) is forcibly switched from humidification ventilation operation to dehumidification ventilation operation, the ventilation control unit (64) changes the operation of the outdoor air conditioner (10) from dehumidification ventilation operation to humidification. Return to ventilated operation. In addition, when the operation of the outdoor air conditioner (10) is forcibly switched from the dehumidification ventilation operation to the humidification ventilation operation, the ventilation control unit (64) dehumidifies the operation of the outdoor air conditioner (10) from the humidification ventilation operation. Return to ventilated operation.

  Incidentally, in the outdoor air conditioner (10), dehumidification ventilation operation and humidification ventilation operation are prohibited, and only simple ventilation operation may be possible. For example, if the compressor (53) and the four-way selector valve (54) are out of order, the refrigerant circuit (50) cannot perform the refrigeration cycle, and therefore the dehumidification ventilation operation and the humidification ventilation operation cannot be performed. In the outdoor air conditioner (10), there may be an operation mode in which indoor ventilation is continuously performed even at night when there is no person in the room. In that case, since it is useless to perform dehumidification ventilation operation and humidification ventilation operation at night when there is no person, dehumidification ventilation operation and humidification ventilation operation are prohibited and only simple ventilation operation is performed.

  Even during simple ventilation operation performed in a state where dehumidification ventilation operation and humidification ventilation operation are prohibited, it is possible that the temperature difference between the room and the outside becomes large, or the dew point temperature of the outdoor air becomes higher than the room temperature. If the simple ventilation operation is continued in a state where the temperature difference between the room and the room is large, the room temperature approaches the room temperature, and the air conditioning load when the room air conditioning is started the next morning increases. Further, when the simple ventilation operation is continued in a state where the dew point temperature of the outdoor air is higher than the room temperature, moisture in the outdoor air is condensed in the inside of the casing (11) or the air outlet exposed in the room. However, dehumidification ventilation operation and humidification ventilation operation are prohibited at this time, so the above problem can be avoided by forcibly switching the operation of the outdoor air conditioner (10) from simple ventilation operation to dehumidification ventilation operation or humidification ventilation operation. I can't do it.

  Therefore, when simple ventilation operation is performed in a state where dehumidification ventilation operation or humidification ventilation operation is prohibited, the ventilation control unit (64) satisfies a predetermined condition in order to avoid the above problem. Then, a control operation for stopping the air supply fan (26) is performed. Here, this control operation will be described with reference to FIG.

  In the ventilation control unit (64), one fan stop condition is set. The fan stop conditions are “a condition that the indoor air temperature Tr is lower than the dew point temperature Todew of the outdoor air (Tr <Todew), a condition that the outdoor air temperature To is higher than 35 ° C. (To> 35 ° C.), and the outdoor air. The condition that at least one of the conditions that the temperature To is lower than 5 ° C. (To <5 ° C.) is satisfied continues for 20 seconds or more ”.

  When this fan stop condition is satisfied, the ventilation control unit (64) stops the air supply fan (26). At that time, the ventilation control unit (64) continues the operation of the exhaust fan (25) and stops only the air supply fan (26). When the air supply fan (26) stops, the flow of outdoor air from the outside to the room through the internal space of the casing (11) stops. For this reason, the change of the indoor air temperature resulting from supplying outdoor air to a room is suppressed, or the dew condensation of the moisture in the outdoor air on the inner wall or outlet of the casing (11) is avoided. When the fan stop condition is satisfied and the supply fan (26) is stopped, the ventilation control unit (64) starts a timer for measuring the elapsed time from when the supply fan (26) is stopped. .

  In the ventilation control unit (64), one fan return condition is set. The fan return condition is a condition that “the elapsed time from when the fan stop condition is satisfied and the supply fan (26) is stopped is one hour or longer”. When this fan return condition is satisfied, the ventilation control unit (64) restarts the operation of the air supply fan (26). When the fan return condition is satisfied, the time measured by the timer is reset to zero in the ventilation control unit (64).

  Here, since the outdoor air does not flow in the casing (11) when the air supply fan (26) is stopped, the outside air humidity sensor (97) and the outside air temperature sensor (99) installed in the casing (11). The outdoor air condition (temperature and humidity) cannot be measured. For this reason, it cannot be determined whether or not the operation of the air supply fan (26) can be resumed while the air supply fan (26) is stopped.

  Therefore, the ventilation control unit (64) temporarily restarts the operation of the air supply fan (26) when one hour has elapsed since the fan stop condition was satisfied and the air supply fan (26) stopped. In the state where the air supply fan (26) is in operation, the state (temperature and humidity) of the outdoor air can be measured using the outside air humidity sensor (97) and the outside air temperature sensor (99). The ventilation control unit (64) continues the operation of the air supply fan (26) if the fan stop condition is not satisfied in this state, and stops the air supply fan (26) again if the fan stop condition is satisfied. .

-Effect of the embodiment-
In the outdoor air conditioner (10) of the present embodiment, when the indoor air temperature becomes lower than the dew point temperature of the outdoor air during the simple ventilation operation, the ventilation control unit (64) of the controller (60) Is forcibly switched from simple ventilation operation to dehumidification ventilation operation. For this reason, it is possible to prevent the simple ventilation operation from being continued in a situation where the indoor air temperature is lower than the dew point temperature of the outdoor air. In such a situation, the operation shifts to a dehumidification ventilation operation that supplies outdoor air after dehumidification to the room. can do. Therefore, according to the present embodiment, it is possible to prevent moisture in the outdoor air from condensing during the simple ventilation operation, and it is possible to prevent troubles such as a failure caused by condensation or falling of the condensed water into the room. it can.

  In the outdoor air conditioner (10) of the present embodiment, when the outdoor temperature exceeds a predetermined upper limit value (35 ° C. in the present embodiment) during the simple ventilation operation, the ventilation control unit (64) of the controller (60) The operation of the outdoor air conditioner (10) is forcibly switched from the simple ventilation operation to the dehumidification ventilation operation to reduce the temperature of the air sent into the room. In this outdoor air conditioner (10), if the outdoor temperature falls below a predetermined lower limit value (5 ° C. in the present embodiment) during the simple ventilation operation, the ventilation control unit (64) of the controller (60) The operation of the conditioner (10) is forcibly switched from simple ventilation operation to humidification ventilation operation to raise the temperature of the air sent into the room. Therefore, according to this embodiment, it is possible to avoid the difference between the temperature of the air supplied from the outdoor air conditioner (10) to the room and the room temperature from being excessively widened, and to ensure the comfort of the room. .

  In the outdoor air conditioner (10) of the present embodiment, when the indoor air temperature becomes lower than the dew point temperature of the outdoor air during the simple ventilation operation performed in a state where the dehumidification ventilation operation is prohibited, the ventilation control unit of the controller (60) (64) stops the air supply fan (26). Therefore, according to this embodiment, it is possible to reliably prevent moisture in the outdoor air from condensing in a portion extending from the internal space of the casing (11) to the room even in a situation where the dehumidifying ventilation operation cannot be performed.

  In the outdoor air conditioner (10) of the present embodiment, when the outdoor temperature exceeds a predetermined upper limit value (35 ° C. in the present embodiment) during the simple ventilation operation performed in a state where the dehumidification ventilation operation is prohibited, the controller ( The ventilation control unit (64) of 60) stops the air supply fan (26). Further, in the outdoor air conditioner (10), when the outdoor temperature falls below a predetermined lower limit value (5 ° C. in this embodiment) during the simple ventilation operation performed in a state where the humidification ventilation operation is prohibited, the controller (60 ) Ventilation control unit (64) stops the air supply fan (26). Therefore, according to the present embodiment, it is possible to suppress a decrease in indoor comfort and an increase in air conditioning load even in a situation where the dehumidification ventilation operation and the humidification ventilation operation cannot be performed.

In the outdoor air conditioner (10) of the present embodiment, the refrigerant circuit (50) performs an adsorption operation and a regeneration operation.
In the adsorption heat exchanger (51, 52) during the adsorption operation (that is, the operation as an evaporator), both dehumidification and cooling of the air are performed in parallel, and the regeneration operation (ie, the operation as a condenser) is performed. In the adsorption heat exchanger (51, 52), both humidification and heating of air are performed in parallel. That is, in the outdoor air conditioner (10), air humidity adjustment and temperature adjustment are performed in one place. Therefore, according to this embodiment, compared with the case where air humidity adjustment and temperature adjustment are performed using separate members, the configuration of the outdoor air conditioner (10) can be simplified.

-Modification 1 of embodiment-
In the refrigerant circuit (50) of the present embodiment, a supercritical cycle in which the high pressure of the refrigeration cycle is set to a value higher than the critical pressure of the refrigerant may be performed. In that case, one of the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) operates as a gas cooler, and the other operates as an evaporator.

-Modification 2 of embodiment-
In the outdoor air conditioner (10) of the present embodiment, the adsorbent carried on the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) is heated or cooled by the refrigerant. The adsorbent may be heated or cooled by supplying cold water or hot water to the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52).

—Modification 3 of Embodiment—
In the said embodiment, the external air conditioner (10) may be comprised as follows.

  As shown in FIG. 12, the outside air conditioner (10) of this modification includes a refrigerant circuit (100) and two adsorption elements (111, 112). In the outside air conditioner (10), the refrigerant circuit (100) and the adsorbing elements (111, 112) constitute the humidity control means (115).

  The refrigerant circuit (100) is a closed circuit in which a compressor (101), a condenser (102), an expansion valve (103), and an evaporator (104) are connected in order. When the refrigerant is circulated in the refrigerant circuit (100), a vapor compression refrigeration cycle is performed. The first adsorption element (111) and the second adsorption element (112) include an adsorbent such as zeolite. A large number of air passages are formed in each adsorption element (111, 112), and the air comes into contact with the adsorbent when passing through the air passages. Each adsorption element (111, 112) constitutes an adsorption unit.

  The outdoor air conditioner (10) of the present modification selectively performs a dehumidifying ventilation operation, a humidifying ventilation operation, and a simple ventilation operation.

  The outdoor air conditioner (10) during the dehumidification / ventilation operation or the humidification / ventilation operation repeats the first operation and the second operation alternately at predetermined time intervals. The outdoor air conditioner (10) during the dehumidification / ventilation operation takes outdoor air as first air and takes indoor air as second air. On the other hand, the outdoor air conditioner (10) during the humidified ventilation operation takes in indoor air as first air and takes in outdoor air as second air.

  First, the first operation of the dehumidifying ventilation operation and the humidifying ventilation operation will be described with reference to FIG. The outdoor air conditioner (10) in the first operation supplies the second air heated by the condenser (102) to the first adsorption element (111). In the first adsorption element (111), the adsorbent is heated by the second air, and moisture is desorbed from the adsorbent. The outdoor air conditioner (10) in the first operation supplies the first air to the second adsorption element (112) and adsorbs the moisture in the first air to the second adsorption element (112). The first air deprived of moisture by the second adsorption element (112) is cooled when passing through the evaporator (104).

  Next, the second operation of the dehumidifying ventilation operation and the humidifying ventilation operation will be described with reference to FIG. The outdoor air conditioner (10) in the second operation supplies the second air heated by the condenser (102) to the second adsorption element (112). In the second adsorption element (112), the adsorbent is heated by the second air, and moisture is desorbed from the adsorbent. The outdoor air conditioner (10) in the first operation supplies the first air to the first adsorption element (111) and adsorbs the moisture in the first air to the first adsorption element (111). The first air deprived of moisture by the first adsorption element (111) is cooled when passing through the evaporator (104).

  The outdoor air conditioner (10) during the dehumidifying ventilation operation supplies the dehumidified first air (outdoor air) to the room, and the moisture desorbed from the adsorption elements (111, 112) together with the second air (indoor air). Drain outside. In addition, the outdoor air conditioner (10) during the humidified ventilation operation supplies the humidified second air (outdoor air) to the room, and the adsorbing element (111, 112) removes the first air (indoor air) from the moisture. Drain outside.

  In the outdoor air conditioner (10) during the simple ventilation operation, the compressor (101) of the refrigerant circuit (100) is stopped, and one of the first adsorption element (111) and the second adsorption element (112) is turned on. Outdoor air passes and room air passes through the other. The outdoor air is supplied to the room after passing through the adsorption elements (111, 112), and the room air is discharged to the outside after passing through the adsorption elements (111, 112). In the outdoor air conditioner (10) during the simple ventilation operation, the outdoor air and the indoor air are not switched.

-Modification 4 of the embodiment-
In the said embodiment, the external air conditioner (10) may be comprised as follows.

  As shown in FIG. 13, the outside air conditioner (10) of the present modification includes a main unit (150) and a heat source unit (165).

  The internal space of the main unit (150) is partitioned into an air supply passage (151) and an exhaust passage (152). The air supply passageway (151) has a start end communicating with the outside air intake port (153) and a terminal end communicating with the air supply port (154). In the supply passage (151), a use side heat exchanger (161), a humidifying element (162), and an supply fan (157) are arranged in order from the start end to the end. The exhaust passage (152) has a start end communicating with the inside air suction port (155) and a terminal end communicating with the exhaust port (156). An exhaust fan (158) is disposed in the exhaust passage (152).

  The heat source unit (165) is connected to the use side heat exchanger (161) via a pair of connecting pipes (166). Although not shown, the heat source unit (165) includes a compressor, an expansion valve, and the like. The heat source unit (165) forms a refrigerant circuit (167) together with the use side heat exchanger (161). The use side heat exchanger (161) is an air heat exchanger that exchanges heat between air and a refrigerant. The refrigerant circuit (167) selectively performs a refrigeration cycle operation in which the use side heat exchanger (161) is an evaporator and a refrigeration cycle operation in which the use side heat exchanger (161) is a condenser. In the outside air conditioner (10) of this modification, the refrigerant circuit (167) and the humidifying element (162) constitute the humidity control means (170).

  Although not shown, in the humidifying element (162), a water passage and an air passage are formed with a moisture permeable membrane interposed therebetween. In the water passage, tap water supplied from the outside flows. In the air passage, air flowing through the air supply passage (151) flows. The moisture permeable membrane allows only water vapor to pass without passing water which is liquid.

  The outdoor air conditioner (10) of the present modification selectively performs a dehumidifying ventilation operation, a humidifying ventilation operation, and a simple ventilation operation.

  In the outdoor air conditioner (10) during the dehumidifying ventilation operation, the refrigerant circuit (167) performs the refrigeration cycle operation in which the use side heat exchanger (161) serves as an evaporator, and the water supply to the humidifying element (162) is stopped. . During this operation, the evaporation temperature of the refrigerant in the use side heat exchanger (161) is set to a value lower than the dew point temperature of the outdoor air. The outdoor air that has flowed into the air supply passageway (151) is cooled when passing through the use side heat exchanger (161), and moisture in the outdoor air is condensed to become drain water. The outdoor air that has passed through the use side heat exchanger (161) passes through the humidifying element (162) and then is supplied to the room through the air supply port (154). The drain water generated in the use side heat exchanger (161) is discharged outside the room. The room air that has flowed into the exhaust passage (152) is exhausted to the outside through the exhaust port (156).

  In the outdoor air conditioner (10) during the humidification ventilation operation, the refrigerant circuit (167) performs a refrigeration cycle operation in which the use side heat exchanger (161) serves as a condenser, and water is supplied to the humidification element (162). The outdoor air that has flowed into the air supply passage (151) is heated when passing through the use side heat exchanger (161) and then sent to the humidifying element (162). In the humidifying element (162), water vapor that has passed through the moisture permeable membrane is imparted to the air. The air humidified by the humidifying element (162) is supplied into the room through the air supply port (154). The room air that has flowed into the exhaust passage (152) is exhausted to the outside through the exhaust port (156).

  In the outside air conditioner (10) during the simple ventilation operation, both the operation of the refrigerant circuit (167) and the water supply to the humidifying element (162) are stopped, and only the operation of the air supply fan (157) and the exhaust fan (158) is performed. Done. The outdoor air that has flowed into the air supply passage (151) sequentially passes through the use-side heat exchanger (161) and the humidifying element (162), and then is supplied into the room through the air supply port (154). The room air that has flowed into the exhaust passage (152) is exhausted to the outside through the exhaust port (156).

  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 for adjusting indoor humidity.

It is a perspective view which abbreviate | omits a part of casing and an electrical component box, and shows the external air conditioner seen from the front side. FIG. 2 is a schematic plan view, right side view, and left side view showing a part of the outdoor air conditioner omitted. It is a piping system diagram showing the composition of a refrigerant circuit, (A) shows operation in the 1st operation, and (B) shows operation in the 2nd operation. It is a schematic plan view, right side view, and left side view of the outside air conditioner showing the air flow in the first operation of the dehumidifying ventilation operation. It is a schematic plan view, a right side view, and a left side view of the outside air conditioner showing the air flow in the second operation of the dehumidifying ventilation operation. It is a schematic plan view, right side view, and left side view of the outside air conditioner showing the air flow in the first operation of the humidification ventilation operation. It is the schematic top view of the external air conditioner which shows the flow of the air in 2nd operation | movement of humidification ventilation driving | operation, a right view, and a left view. It is a schematic plan view, a right side view, and a left side view of an outdoor air conditioner showing a flow of air in a simple ventilation operation. It is a block diagram which shows the structure of the controller (60) of an external air conditioner. It is a state transition diagram which shows the operation | movement which the ventilation control part (64) of a controller (60) performs. It is a state transition diagram which shows the operation | movement which the ventilation control part (64) of a controller (60) performs. It is a schematic block diagram which shows the external air conditioner of the modification 3 of embodiment, Comprising: (A) shows the operation | movement in 1st operation | movement, (B) shows the operation | movement in 2nd operation | movement. . It is a schematic block diagram which shows the external air conditioner of the modification 4 of embodiment.

Explanation of symbols

10 Outside air conditioner (humidity control device)
50 Refrigerant circuit (humidity control)
51 First adsorption heat exchanger (adsorption unit)
52 Second adsorption heat exchanger (adsorption unit)
64 Ventilation control unit (control means)
65 Outdoor dew point temperature detection means
98 Inside air temperature sensor (indoor temperature detection means)
111 First adsorption element (adsorption unit)
112 Second adsorption element (adsorption unit)
115 Humidity control means
170 Humidity control means

Claims (4)

Humidity control means (50,115,170) that at least dehumidifies the air,
Dehumidification ventilation operation that dehumidifies the outdoor air taken in by the humidity control means (50,115,170) and then supplies it to the room; And are configured to be executable,
Indoor temperature detection means (98) for detecting the indoor air temperature;
Outdoor dew point temperature detecting means (65) for detecting the dew point temperature of outdoor air;
When the indoor air temperature detected by the indoor temperature detecting means (98) during the simple ventilation operation becomes lower than the dew point temperature of the outdoor air detected by the outdoor dew point temperature detecting means (65), the simple ventilation operation is started. The humidity control apparatus further comprising control means (64) forcibly switching to the dehumidifying ventilation operation. In claim 1,
The control means (64) detects the outdoor dew point temperature detected by the indoor temperature detection means (98) during the simple ventilation operation performed in a state where the dehumidification ventilation operation is prohibited. A humidity control apparatus configured to stop the supply of outdoor air to a room when the temperature becomes lower than the dew point of the outdoor air detected by the means (65). In claim 1 or 2,
The humidity control means (50,115) includes an adsorption unit (51,52,111,112) having an adsorbent and contacting the adsorbent with air, and adsorbs moisture in the air to the adsorption unit (51,52,111,112). The humidity control apparatus is configured to dehumidify air. In claim 3,
The humidity control means includes an adsorption heat exchanger (51, 52) having an adsorbent supported on the surface as the adsorption unit, and a refrigerant that performs a refrigeration cycle with the adsorption heat exchanger (51, 52) connected thereto. Circuit (50),
The refrigerant circuit (50) includes an adsorption operation in which the adsorbent of the adsorption heat exchanger (51, 52) is cooled with a refrigerant and the adsorption heat exchanger (51, 52) adsorbs moisture in the air, A humidity control apparatus configured to perform a regeneration operation of regenerating the adsorption heat exchanger (51, 52) by heating the adsorbent of the adsorption heat exchanger (51, 52) with a refrigerant .

Images