JP2010065977A - Air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operation efficiency of a temperature adjusting device, in an air conditioning system equipped with a humidity control system and the temperature adjusting device. <P>SOLUTION: The air conditioning system 10 is composed of an air conditioner 20 and an outside air treatment unit 50. The air conditioner 20 during cooling operation supplies air cooled in indoor units 22a-22d into a room. The outside air treatment unit 50 during dehumidification operation supplies air dehumidified in humidity control units 52a, 52b. In the air conditioning system 10, a control system 90 is composed of an air conditioning side controller 91 and humidity control side controllers 92a, 92b. The humidity control side controller 92a sets a desired value Tes of a coolant evaporation temperature, in a coolant circuit 30 of the air conditioner 20, higher than a dew point temperature of indoor air. The air conditioning side controller 91 adjusts operation capacity of an air conditioning compressor 41 so that the coolant evaporation temperature in the coolant circuit 30 becomes the desired value Tes. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioning system including a humidity adjusting device for adjusting the humidity of air and a temperature adjusting device for adjusting the temperature of air.

2. Description of the Related Art Conventionally, an air conditioning system including a humidity adjusting device that adjusts the humidity of air and a temperature adjusting device that adjusts the temperature of air is known. For example, Patent Literature 1 discloses an air conditioning system that includes a humidity adjusting device that adjusts the humidity of air using a desiccant rotor and a temperature adjusting device that is provided with a refrigerant circuit that performs a refrigeration cycle. Patent Document 2 and Patent Document 3 disclose a humidity adjusting device that adjusts the humidity of air by heating or cooling an adsorbent carried on the surface of an air heat exchanger with a refrigerant, and a refrigerant that performs a refrigeration cycle. An air conditioning system including a temperature control device provided with a circuit is disclosed. In this type of air conditioning system, the humidity control device mainly processes the latent heat load in the room, and the temperature control device mainly processes the sensible heat load in the room.
JP 09-318126 A JP 2005-291585 A JP 2006-329471 A

  By the way, in a temperature control device (that is, a general air conditioner) provided with a refrigerant circuit for performing a refrigeration cycle, during the cooling operation, the air is cooled and at the same time, moisture in the air is condensed to lower the humidity of the air. In order to achieve this, the evaporating temperature of the refrigerant is usually set to a value considerably lower than the dew point of air. On the other hand, in the temperature control device that constitutes the air conditioning system together with the humidity control device, the dehumidification of air can be performed by the humidity control device, so that it is not necessary to dehumidify air in the temperature control device. However, in the conventional air conditioning system, such a characteristic of the air conditioning system (that is, the characteristic that the temperature regulator does not need to dehumidify air) is not sufficiently utilized for controlling the temperature regulator, and as a result, There was a possibility that the operating efficiency of the temperature control device could not be improved sufficiently.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an air conditioning system including a humidity control device and a temperature control device by utilizing the characteristics of the air conditioning system for controlling the temperature control device. (20) To improve the driving efficiency.

  The first aspect of the present invention is a humidity adjusting device (50) that adjusts the humidity of air using an adsorbent, and a temperature adjusting device that adjusts the temperature of air using the refrigerant of the refrigerant circuit (30) that performs the refrigeration cycle. (20), and an air conditioning system that supplies the air whose humidity is adjusted by the humidity adjusting device (50) and the air whose temperature is adjusted by the temperature adjusting device (20) to an indoor space. The temperature control device (20) is configured to be capable of performing a cooling operation for supplying the air cooled in the evaporator of the refrigerant circuit (30) into the room, while detecting a dew point temperature of the room air. The operating state of the temperature detecting means (55a, 56a, 92a) and the temperature adjusting device (20) during the cooling operation is determined based on the evaporating temperature of the refrigerant in the refrigerant circuit (30) of the temperature adjusting device (20). It further includes control means (90) for adjusting the temperature detection means (55a, 56a, 92a) so as to be maintained at a value higher than the detected value.

  In the first invention, the humidity adjusting device (50) adjusts the humidity of the air by adsorbing and desorbing moisture in the air to and from the adsorbent. The temperature adjusting device (20) adjusts the temperature of the air by causing the refrigerant circulating in the refrigerant circuit (30) to exchange heat with the air. The temperature control device (20) during the cooling operation supplies air cooled in the evaporator of the refrigerant circuit (30) to the room. During the cooling operation of the temperature control device (20), the control means (90) detects the evaporation temperature of the refrigerant in the refrigerant circuit (30) by the detection value (ie, the dew point temperature detection means (55a, 56a, 92a)). The measured value is higher than the measured value of the dew point temperature of indoor air. For this reason, in the temperature control device (20) during the cooling operation, in the evaporator of the refrigerant circuit (30), the temperature of the air is maintained at a value higher than the dew point temperature, and in the process of being cooled by the refrigerant, Water does not condense. That is, in the temperature control device (20) during the cooling operation, only the temperature of the air is lowered, and the amount of water contained in the air (that is, absolute humidity) does not change. On the other hand, in the humidity adjusting device (50), the amount of water contained in the air supplied to the room is adjusted.

  In a second aspect based on the first aspect, the control means (90) is provided in the refrigerant circuit (30) of the temperature controller (20) during the cooling operation of the temperature controller (20). The operating capacity of the compressor (41) thus adjusted is adjusted so that the refrigerant evaporation temperature in the refrigerant circuit (30) becomes a predetermined target evaporation temperature, and the target evaporation temperature is adjusted to the dew point temperature detecting means (55a, 56a). , 92a) is set to a value higher than the detected value.

  In the second invention, the control means (90) is configured such that the operating capacity of the compressor (41) provided in the refrigerant circuit (30) of the temperature control device (20) during the cooling operation of the temperature control device (20). Is adjusted so that the evaporation temperature of the refrigerant in the refrigerant circuit (30) becomes a predetermined target evaporation temperature. That is, the control means (90) increases the operating capacity of the compressor (41) if the refrigerant evaporation temperature in the refrigerant circuit (30) is higher than the target evaporation temperature, and conversely, the refrigerant evaporation temperature in the refrigerant circuit (30). If is lower than the target evaporation temperature, the operating capacity of the compressor (41) is reduced. At that time, the control means (90) sets the target evaporation temperature to a value higher than the detection value of the dew point temperature detection means (55a, 56a, 92a). For this reason, in the temperature control device (20) during the cooling operation, the evaporation temperature of the refrigerant in the refrigerant circuit (30) is maintained at a value higher than the measured value of the dew point temperature of the room air.

  In a third aspect based on the second aspect, the control means (90) is configured to control the value of the target evaporation temperature in order to suppress a decrease in cooling capacity during the cooling operation of the temperature control device (20). It is configured to perform an ability holding operation for increasing the flow rate of the air passing through the evaporator of the temperature control device (20) as the temperature increases.

  In the third invention, the control means (90) performs the capacity maintaining operation during the cooling operation of the temperature control device (20). Here, in the temperature control device (20) during cooling operation, if the refrigerant evaporation temperature in the refrigerant circuit (30) is kept higher than the dew point temperature of the room air, the temperature difference between the refrigerant and air in the evaporator is small. Therefore, the amount of heat that the refrigerant absorbs from the air per unit time may decrease, and sufficient cooling capacity may not be obtained. Therefore, the control means (90) of the present invention performs a capacity maintaining operation to increase the flow rate of air passing through the evaporator, and to increase the amount of heat that the refrigerant absorbs from the air per unit time, thereby suppressing a decrease in cooling capacity. .

  In a fourth aspect based on the second aspect, the temperature control device (20) includes a plurality of indoor units (22a to 22d) each having a heat exchanger (36a to 36d) serving as an evaporator during cooling operation. In the cooling operation of the temperature control device (20), the control means (90) includes a plurality of the indoors as the target evaporation temperature increases in order to suppress a decrease in cooling capacity. It is comprised so that the capability holding | maintenance operation | movement which increases the number of what is drive | operated among units (22a-22d) may be performed.

  In the fourth invention, the control means (90) performs the capacity maintaining operation during the cooling operation of the temperature control device (20). Here, in the temperature control device (20) during cooling operation, if the refrigerant evaporation temperature in the refrigerant circuit (30) is kept higher than the dew point temperature of the room air, the temperature difference between the refrigerant and air in the evaporator is small. Therefore, the amount of heat that the refrigerant absorbs from the air per unit time may decrease, and sufficient cooling capacity may not be obtained. Therefore, the control means (90) of the present invention increases the number of indoor units (22a to 22d) that are operated by performing the capacity maintaining operation. And even if the cooling capacity obtained by one indoor unit (22a-22d) decreases, the number of operating indoor units (22a-22d) increases, so the cooling capacity of the temperature control device (20) as a whole decreases. It can be suppressed.

  In the air conditioning system (10) of the present invention, the humidity adjusting device (50) adjusts the humidity of the air supplied to the room, while the temperature adjusting device (20) during the cooling operation sets the evaporation temperature of the refrigerant to the room air. It is kept above the dew point temperature. As described above, the air conditioning system (10) of the present invention has a characteristic that the temperature adjusting device (20) only needs to adjust the air temperature because the humidity adjusting device (50) adjusts the air humidity. Therefore, in the present invention, the evaporation temperature of the refrigerant in the temperature adjustment device (20) during the cooling operation is maintained at a value higher than the dew point temperature of the room air, and only the temperature of the air is adjusted in the temperature adjustment device (20). ing. For this reason, in the refrigerant circuit (30) of the temperature controller (20), the evaporation temperature of the refrigerant can be set to a higher value than when the temperature controller (20) also performs dehumidification of air.

  Therefore, according to the present invention, the low pressure (that is, the refrigerant evaporation pressure) in the refrigerant circuit (30) of the temperature control device (20) during the cooling operation can be set high, and the refrigerant circuit (30) performs the operation. The difference between high pressure and low pressure in the refrigeration cycle can be reduced. As a result, the power consumed by the compressor (41) of the refrigerant circuit (30) can be reduced, and the operating efficiency of the temperature control device (20) can be improved.

  In the third aspect of the invention, the control means (90) performs the capacity maintaining operation to increase the amount of air passing through the evaporator in the temperature adjusting device (20), whereby the refrigerant evaporation temperature in the refrigerant circuit (30) is relatively high. Even in this state, the decrease in cooling capacity of the temperature control device (20) is suppressed. Moreover, in the said 4th invention, a control means (90) performs capability maintenance operation | movement, and the operating number of indoor units (22a-22d) is increased, The evaporating temperature of the refrigerant | coolant in a refrigerant circuit (30) is comparatively high. Even in this state, the decrease in cooling capacity of the entire temperature control device (20) is suppressed. Therefore, according to these third and fourth inventions, the cooling capacity of the air conditioning system (10) even when the refrigerant evaporation temperature in the refrigerant circuit (30) is set to a value higher than the dew point temperature of the room air. The indoor comfort can be secured by suppressing the decrease in the temperature.

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

Embodiment 1 of the Invention
A first embodiment of the present invention will be described. The air conditioning system (10) of this embodiment includes an air conditioner (20) that is a temperature control device and an outside air processing device (50) that is a humidity control device. In this air conditioning system (10), the air conditioning side controller (91) provided in the air conditioner (20) and the humidity control side controller (92a, 92b) provided in the outside air processing machine (50) are controlled. The control system (90) which is a means is comprised.

<Configuration of air conditioner>
The air conditioner (20) constituting the air conditioning system (10) includes one outdoor unit (21) and four indoor units (22a, 22b, 22c, 22d). In the air conditioner (20), an air conditioning refrigerant circuit (30) is formed by connecting the outdoor unit (21) and the indoor units (22a to 22d) with pipes. The numbers of outdoor units (21) and indoor units (22a to 22d) are merely examples.

  The outdoor unit (21) accommodates an outdoor circuit (40) and an outdoor fan (23). The outdoor circuit (40) includes an air conditioning compressor (41), an accumulator (42), a four-way switching valve (43), an outdoor heat exchanger (44), an outdoor expansion valve (45), and a receiver ( 46), a liquid side closing valve (47), and a gas side closing valve (48).

  In the outdoor circuit (40), the air-conditioning compressor (41) has a discharge side connected to the first port of the four-way switching valve (43), and a suction side connected to the four-way switching valve (43) via the accumulator (42). Connected to the second port. The third port of the four-way switching valve (43) is connected to the gas side end of the outdoor heat exchanger (44). The liquid side end of the outdoor heat exchanger (44) is connected to one end of the outdoor expansion valve (45). The other end of the outdoor expansion valve (45) is connected to the liquid side closing valve (47) via the receiver (46). The fourth port of the four-way switching valve (43) is connected to the gas side closing valve (48).

  The outdoor circuit (40) is provided with a high pressure sensor (26) and a low pressure sensor (27). The high pressure sensor (26) is connected to a pipe connecting the discharge side of the air conditioning compressor (41) and the four-way switching valve (43), and measures the pressure of the high pressure refrigerant discharged from the air conditioning compressor (41). The low pressure sensor (27) is connected to a pipe connecting the accumulator (42) and the four-way selector valve (43), and measures the pressure of the low pressure refrigerant sucked into the air conditioning compressor (41).

  The air conditioning compressor (41) is a so-called hermetic compressor. Electric power is supplied to the motor of the air conditioning compressor (41) via an inverter (not shown). Changing the frequency of AC supplied from the inverter to the motor (that is, the operating frequency of the air conditioning compressor (41)) changes the rotational speed of the motor, and as a result, the operating capacity of the air conditioning compressor (41). Changes.

  The outdoor heat exchanger (44) is a fin-and-tube heat exchanger that exchanges heat between the outdoor air supplied by the outdoor fan (23) and the refrigerant. The four-way switching valve (43) includes a first state (state indicated by a solid line in FIG. 1) in which the first port communicates with the third port and the second port communicates with the fourth port; The port is switched to a second state (a state indicated by a broken line in FIG. 1) in which the port communicates with the fourth port and the second port communicates with the third port.

  Each indoor unit (22a-22d) accommodates one indoor circuit (35a, 35b, 35c, 35d). Each indoor unit (22a-22d) is provided with one indoor fan (24a, 24b, 24c, 24d) and one indoor temperature sensor (25a, 25b, 25c, 25d).

  Each indoor circuit (35a to 35d) is provided with one indoor heat exchanger (36a, 36b, 36c, 36d) and one indoor expansion valve (37a, 37b, 37c, 37d). The indoor heat exchangers (36a to 36d) are fin-and-tube heat exchangers that exchange the indoor air supplied by the indoor fans (24a to 24d) with the refrigerant.

  In each indoor circuit (35a-35d), one end of the indoor heat exchanger (36a-36d) is connected to the gas side end of the indoor circuit (35a-35d), and the other end is an indoor expansion valve (37a-37d). Is connected to the liquid side end of the indoor circuit (35a to 35d). Each indoor circuit (35a to 35d) has its liquid side end connected to the liquid side shut-off valve (47) of the outdoor circuit (40) via the liquid side connecting pipe (31), and each gas side end has a gas side. It is connected to the gas side shut-off valve (48) of the outdoor circuit (40) via the side connection pipe (32).

  Although not shown, each indoor unit (22a to 22d) has an air inlet and an outlet. Each indoor unit (22a-22d) is installed so that all of the suction inlets and outlets formed in the respective indoor units communicate with the same indoor space. That is, each indoor unit (22a-22d) sucks indoor air from the same indoor space, and blows out the indoor air which passed the indoor heat exchanger (36a-36d) to the same indoor space.

<Configuration of outside air treatment machine>
The outside air processor (50) constituting the air conditioning system (10) includes one compressor unit (51) and two humidity control units (52a, 52b). In the outside air processor (50), the humidity control refrigerant circuit (60) is formed by connecting the compressor unit (51) and the humidity control units (52a, 52b) with pipes. In addition, the number of compressor units (51) and humidity control units is merely an example.

  The compressor unit (51) accommodates a compressor side circuit (70). The compressor side circuit (70) is provided with a humidity control compressor (71), an accumulator (72), a high pressure side closing valve (73), and a low pressure side closing valve (74). In the compressor side circuit (70), the humidity control compressor (71) has its discharge side connected to the high pressure side closing valve (73), and this suction side connected to the low pressure side closing valve (74) via the accumulator (72). It is connected to the.

  The humidity control compressor (71) is a so-called hermetic compressor. Electric power is supplied to the electric motor of the humidity control compressor (71) via an inverter (not shown). When the frequency of the alternating current supplied from the inverter to the electric motor (that is, the operating frequency of the humidity control compressor (71)) is changed, the rotational speed of the electric motor changes. As a result, the humidity control compressor (71) The operating capacity changes.

  As shown in FIG. 2, each humidity control unit (52a, 52b) accommodates one humidity control circuit (80a, 80b). Each humidity control circuit (80a, 80b) includes a four-way switching valve (83a, 83b), a first adsorption heat exchanger (81a, 81b), and a second adsorption heat exchanger (82a, 82b). One wet expansion valve (84a, 84b) is provided.

  In each humidity control circuit (80a, 80b), the four-way switching valve (83a, 83b) has its first port connected to the high-pressure end of the humidity control circuit (80a, 80b), and its second port. Is connected to the low-pressure side end of the humidity control circuit (80a, 80b). In each humidity control circuit (80a, 80b), in order from the third port of the four-way switching valve (83a, 83b) to the fourth port, the first adsorption heat exchanger (81a, 81b), A humidity control expansion valve (84a, 84b) and a second adsorption heat exchanger (82a, 82b) are arranged. Each humidity control circuit (80a, 80b) has its high-pressure end connected to the high-pressure side shut-off valve (73) of the compressor-side circuit (70) via the high-pressure side connecting pipe (61). The side end is connected to the low pressure side shut-off valve (74) of the compressor side circuit (70) via the low pressure side connecting pipe (62).

  Each of the first adsorption heat exchanger (81a, 81b) and the second adsorption heat exchanger (82a, 82b) has an adsorbent such as zeolite supported on the surface of a fin-and-tube heat exchanger. It is. In these adsorption heat exchangers (81a, 82a, 81b, 82b), the adsorbent carried on the surface is heated or cooled by the refrigerant, and the air passing there comes into contact with the adsorbent. Each four-way switching valve (83a, 83b) has a first state (state shown in FIG. 2 (A)) in which the first port communicates with the third port and the second port communicates with the fourth port. The second port is switched to the second state (the state shown in FIG. 2B) in which the first port communicates with the fourth port and the second port communicates with the third port.

  Each humidity control unit (52a, 52b) accommodates an air supply fan (53a, 53b) and an exhaust fan (54a, 54b). Each humidity control unit (52a, 52b) has an air passage. In each humidity control unit (52a, 52b), the air circulation path can be switched by opening and closing a damper (not shown). Each humidity control unit (52a, 52b) sucks indoor air and outdoor air, and exhausts indoor air that has passed through the adsorption heat exchanger (81a, 82a, 81b, 82b) to the outside. The outdoor air that has passed (81a, 82a, 81b, 82b) is supplied to the room.

  Specifically, in each humidity control unit (52a, 52b), the air flow path on the upstream side of the adsorption heat exchanger (81a, 82a, 81b, 82b), the indoor air is the first adsorption heat exchanger (81a, 81b), the outdoor air is sent to the second adsorption heat exchanger (82a, 82b) (the state shown in FIG. 2A), and the indoor air is the second adsorption heat exchanger (82a, 82b). The outdoor air can be switched to a state (the state shown in FIG. 2B) where the outdoor air is sent to the first adsorption heat exchanger (81a, 81b). In each humidity control unit (52a, 52b), the air flow path downstream of the adsorption heat exchanger (81a, 82a, 81b, 82b) has passed through the first adsorption heat exchanger (81a, 81b). State in which air is sent to the exhaust fan (54a, 54b) and passed through the second adsorption heat exchanger (82a, 82b) and sent to the air supply fan (53a, 53b) (state shown in FIG. 2A) ) And the air that has passed through the first adsorption heat exchanger (81a, 81b) is sent to the supply fan (53a, 53b) and the air that has passed through the second adsorption heat exchanger (82a, 82b) 54a, 54b) can be switched to the state (the state shown in FIG. 2B).

  Each humidity control unit (52a, 52b) includes an indoor temperature sensor (55a, 55b), an indoor humidity sensor (56a, 56b), an outdoor temperature sensor (57a, 57b), and an outdoor humidity sensor (58a, 58b). And are provided. These sensors (53a, 54, ..., 53b, 54b, ...) are installed upstream of the adsorption heat exchangers (81a, 82a, 81b, 82b) in the air flow path. The indoor temperature sensor (55a, 55b) measures the temperature of the indoor air sucked into the humidity control unit (52a, 52b). The indoor humidity sensor (56a, 56b) measures the relative humidity of the indoor air sucked into the humidity control unit (52a, 52b). The outdoor temperature sensor (57a, 57b) measures the temperature of the outdoor air sucked into the humidity control unit (52a, 52b). The outdoor humidity sensor (58a, 58b) measures the relative humidity of the outdoor air sucked into the humidity control unit (52a, 52b).

  Although not shown, each humidity control unit (52a, 52b) is formed with an air inlet and outlet for indoor air and an air inlet and outlet for outdoor air. Each of the humidity control units (52a, 52b) is installed so that all of the indoor air inlets and outlets formed therein communicate with the same indoor space. That is, each humidity control unit (52a, 52b) sucks indoor air from the same indoor space and discharges it outside the room, and supplies the taken outdoor air to the same indoor space.

  Moreover, the indoor space formed in each humidity control unit (52a, 52b) through which the indoor air inlet and outlet communicates is the inlet and outlet of each indoor unit (22a to 22d) of the air conditioner (20). It is the same space as the indoor space that communicates. In other words, in the air conditioning system (10) of the present embodiment, the indoor air inlet and outlet formed in each humidity control unit (52a, 52b) and the inlet formed in each indoor unit (22a to 22d). And the air outlet both communicate with a common indoor space.

<Control system configuration>
As described above, the control system (90) of the air conditioning system (10) includes the air conditioning side controller (91) and the humidity control side controllers (92a, 92b).

  The air conditioning controller (91) is accommodated in the outdoor unit (21) of the air conditioner (20). The measured values of the low pressure sensor (27) and the high pressure sensor (26) are input to the air conditioning side controller (91). Further, the target value of the indoor temperature set by the user (that is, the target indoor temperature Ts) is input to the air conditioning controller (91) via a remote controller (not shown).

  The air conditioning controller (91) is configured to control the operation of the air conditioner (20). During the cooling operation of the air conditioner (20), the air conditioning controller (91) adjusts the output frequency of the inverter connected to the air conditioning compressor (41) according to the sensible heat load in the room. That is, the air conditioning controller (91) is configured to adjust the operating capacity of the air conditioning compressor (41) in accordance with the sensible heat load in the room.

  The humidity control controllers (92a, 92b) are housed one by one in the humidity control units (52a, 52b) of the outside air processor (50). A target value of indoor humidity (that is, target indoor humidity Hs) is input to each humidity adjustment controller (92a, 92b) via a remote controller (not shown). The humidity control controller (92a) provided in the first humidity control unit (52a) includes an indoor temperature sensor (55a), an indoor humidity sensor (56a) provided in the first humidity control unit (52a), Measurement values of the outdoor temperature sensor (57a) and the outdoor humidity sensor (58a) are input. The humidity control side controller (92a) is configured to control the operation of the first humidity control unit (52a). The humidity controller (92b) provided in the second humidity control unit (52b) includes an indoor temperature sensor (55b), an indoor humidity sensor (56b) provided in the second humidity control unit (52b), Measurement values of the outdoor temperature sensor (57b) and the outdoor humidity sensor (58b) are input. This humidity control controller (92b) is configured to control the operation of the second humidity control unit (52b).

  The humidity control controller (92a) provided in the first humidity control unit (52a) performs operation control of the humidity control compressor (71) and transmission of the target evaporation temperature Tes to the air conditioning controller (91). Configured to do. During the operation of the outside air processor (50), the humidity controller (92a) adjusts the output frequency of the inverter connected to the humidity control compressor (71) according to the latent heat load in the room. That is, the humidity control controller (92a) is configured to adjust the operating capacity of the humidity control compressor (71) in accordance with the latent heat load in the room. Further, during the cooling operation of the air conditioner (20), the humidity control side controller (92a) calculates the target value (that is, the target evaporation temperature Tes) of the refrigerant evaporation temperature in the air conditioning refrigerant circuit (30) to calculate the air conditioning side. Send to controller (91).

  The humidity controller (92a) is configured to calculate the dew point temperature Tdp of the room air in order to calculate the target evaporation temperature Tes. Specifically, the humidity controller (92a) uses the measured values of the indoor temperature sensor (55a) and the indoor humidity sensor (56a) provided in the first humidity control unit (52a) to dew point the indoor air. Tdp is calculated. In this embodiment, a dew point temperature detection means is comprised by the humidity control side controller (92a), the indoor temperature sensor (55a), and the indoor humidity sensor (56a).

  In this embodiment, the humidity controller (92a) provided in the first humidity control unit (52a) controls the operation of the humidity control compressor (71) and the target evaporation for the air conditioning controller (91). Although it is configured to transmit the temperature Tes, this is merely an example. That is, in the outside air processing machine (50) including a plurality of humidity control units (52a, 52b) as in the present embodiment, the humidity control controllers (92a, 92b) provided in the respective humidity control units (52a, 52b) ) May be configured to perform operation control of the humidity control compressor (71) and transmission of the target evaporation temperature Tes to the air-conditioning controller (91).

-Driving action-
The operation of the air conditioning system (10) will be described. In the air conditioning system (10) of the present embodiment, the air conditioner (20) can be switched between a cooling operation and a heating operation, and the outside air processor (50) can be switched between a dehumidifying operation and a humidifying operation. In this air conditioning system (10), the outside air processing device (50) may perform a dehumidifying operation or a humidifying operation during the cooling operation of the air conditioner (20). In the air conditioning system (10), the outside air processing device (50) may perform the dehumidifying operation or the humidifying operation during the heating operation of the air conditioner (20).

<Operation of air conditioner>
As described above, in the air conditioner (20), the cooling operation and the heating operation can be switched. In both the cooling operation and the heating operation, the air-conditioning refrigerant circuit (30) of the air conditioner (20) performs the vapor compression refrigeration cycle by circulating the refrigerant.

  The cooling operation of the air conditioner (20) will be described. In the air conditioning refrigerant circuit (30) during the cooling operation, the four-way switching valve (43) is set to the first state (the state indicated by the solid line in FIG. 1), the outdoor expansion valve (45) is set to the fully open state, The opening degree of the indoor expansion valve (37a to 37d) is adjusted as appropriate. In the air conditioning refrigerant circuit (30) during the cooling operation, the outdoor heat exchanger (44) operates as a condenser, and each of the indoor heat exchangers (36a to 36d) operates as an evaporator.

  The refrigerant flow in the air conditioning refrigerant circuit (30) during the cooling operation will be specifically described. The high-pressure refrigerant discharged from the air conditioning compressor (41) flows into the outdoor heat exchanger (44) after passing through the four-way switching valve (43), dissipates heat to the outdoor air, and condenses. The refrigerant flowing out of the outdoor heat exchanger (44) flows into the liquid side communication pipe (31) after passing through the outdoor expansion valve (45) and the receiver (46), and is distributed to each indoor circuit (35a to 35d). . The refrigerant flowing into each indoor circuit (35a to 35d) is reduced in pressure when passing through the indoor expansion valve (37a to 37d) to become a low pressure refrigerant, and then flows into the indoor heat exchanger (36a to 36d) It absorbs heat from the air and evaporates. In each indoor circuit (35a-35d), the refrigerant flowing out of the indoor heat exchanger (36a-36d) flows into the gas side connecting pipe (32), joins, and then flows into the outdoor circuit (40), where the four-way switching valve After passing through (43), it is sucked into the air conditioning compressor (41) and compressed.

  As described above, during the cooling operation, each indoor heat exchanger (36a to 36d) operates as an evaporator. Each indoor unit (22a-22d) cools the sucked indoor air in the indoor heat exchanger (36a-36d) and then sends it back into the room.

  The heating operation of the air conditioner (20) will be described. In the air conditioning refrigerant circuit (30) during the heating operation, the four-way switching valve (43) is set to the second state (the state indicated by the broken line in FIG. 1), and the outdoor expansion valve (45) and each indoor expansion valve (37a to 37a) are set. The opening degree of 37d) is adjusted as appropriate. In the air conditioning refrigerant circuit (30) during the heating operation, each indoor heat exchanger (36a to 36d) operates as a condenser, and the outdoor heat exchanger (44) operates as an evaporator.

  The refrigerant flow in the air conditioning refrigerant circuit (30) during the heating operation will be specifically described. The refrigerant discharged from the air conditioning compressor (41) passes through the four-way switching valve (43) and then flows into the gas side communication pipe (32) and is distributed to the indoor circuits (35a to 35d). The refrigerant flowing into each indoor circuit (35a to 35d) flows into the indoor heat exchanger (36a to 36d), dissipates heat to the indoor air, and condenses. In each indoor circuit (35a-35d), the refrigerant flowing out of the indoor heat exchanger (36a-36d) flows through the indoor expansion valve (37a-37d) and then flows into the liquid side connecting pipe (31) to join. It flows into the outdoor circuit (40). The refrigerant flowing into the outdoor circuit (40) flows into the outdoor expansion valve (45) after passing through the receiver (46), and is reduced in pressure when passing through the outdoor expansion valve (45) to become a low-pressure refrigerant. The refrigerant that has passed through the outdoor expansion valve (45) flows into the outdoor heat exchanger (44), absorbs heat from the outdoor air, and evaporates. The refrigerant that has flowed out of the outdoor heat exchanger (44) passes through the four-way switching valve (43) and is then sucked into the air conditioning compressor (41) and compressed.

  As described above, during the heating operation, each indoor heat exchanger (36a to 36d) operates as a condenser. Each indoor unit (22a-22d) heats the sucked indoor air in the indoor heat exchanger (36a-36d) and then sends it back into the room.

<Operation of outside air processor>
As described above, in the outside air processing device (50), the dehumidifying operation and the humidifying operation can be switched. In both the dehumidifying operation and the humidifying operation, the vapor conditioning refrigerant circuit (60) of the outdoor air processor (50) performs a vapor compression refrigeration cycle by circulating the refrigerant.

  The dehumidifying operation of the outside air processor (50) will be described with reference to FIG. During the dehumidifying operation, each of the humidity control units (52a, 52b) alternately performs the first operation and the second operation every predetermined time (for example, every 3 minutes). Note that the timing of mutual switching between the first operation and the second operation in each humidity control unit (52a, 52b) does not need to be synchronized with each other.

  As shown in FIG. 2 (A), in the humidity control unit (52a, 52b) in the first operation, the four-way switching valve (83a, 83b) is set to the first state, and the humidity control expansion valve (84a, 84b). ) Is appropriately adjusted. In the humidity control circuit (80a, 80b) during the first operation, the first adsorption heat exchanger (81a, 81b) operates as a condenser, and the second adsorption heat exchanger (82a, 82b) is an evaporator. Works as. In the first adsorption heat exchanger (81a, 81b), the adsorbent supported on the surface is heated by the refrigerant. In the second adsorption heat exchanger (82a, 82b), the adsorbent carried on the surface is cooled by the refrigerant.

  The flow of the refrigerant in the humidity control circuit (80a, 80b) during the first operation will be specifically described. The high-pressure refrigerant discharged from the humidity-control compressor (71) is supplied to the high-pressure side end of the humidity control circuit (80a, 80b) through the high-pressure side connection pipe (61). The high-pressure refrigerant flowing into the humidity control circuit (80a, 80b) flows into the first adsorption heat exchanger (81a, 81b) and condenses after passing through the four-way switching valve (83a, 83b). The refrigerant that has flowed out of the first adsorption heat exchanger (81a, 81b) is reduced in pressure when passing through the humidity control expansion valves (84a, 84b) to become a low-pressure refrigerant, and then the second adsorption heat exchanger (82a, 82b) and evaporates. The refrigerant that has flowed out of the second adsorption heat exchanger (82a, 82b) passes through the four-way switching valve (83a, 83b) and then flows into the low-pressure side connection pipe (62) and then to the humidity control compressor (71). Inhaled and compressed.

  Further, as shown in FIG. 2A, in the humidity control unit (52a, 52b) in the first operation, the indoor air is sent to the first adsorption heat exchanger (81a, 81b), and the outdoor air is second. It is sent to the adsorption heat exchanger (82a, 82b). In the first adsorption heat exchanger (81a, 81b), moisture desorbed from the heated adsorbent is given to the room air. The room air humidified when passing through the first adsorption heat exchanger (81a, 81b) is sucked into the exhaust fan (54a, 54b) and then discharged outside the room. On the other hand, in the second adsorption heat exchanger (82a, 82b), moisture in the outdoor air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The outdoor air dehumidified when passing through the second adsorption heat exchanger (82a, 82b) is sucked into the air supply fan (53a, 53b) and then supplied into the room.

  As shown in FIG. 2B, in the humidity control unit (52a, 52b) in the second operation, the four-way switching valve (83a, 83b) is set to the second state, and the humidity control expansion valve (84a, 84b). ) Is appropriately adjusted. In the humidity control circuit (80a, 80b) during the second operation, the second adsorption heat exchanger (82a, 82b) operates as a condenser, and the first adsorption heat exchanger (81a, 81b) is an evaporator. Works as. In the second adsorption heat exchanger (82a, 82b), the adsorbent supported on the surface is heated by the refrigerant. In the first adsorption heat exchanger (81a, 81b), the adsorbent carried on the surface is cooled by the refrigerant.

  The flow of the refrigerant in the humidity control circuit (80a, 80b) during the second operation will be specifically described. The high-pressure refrigerant discharged from the humidity-control compressor (71) is supplied to the high-pressure side end of the humidity control circuit (80a, 80b) through the high-pressure side connection pipe (61). The high-pressure refrigerant flowing into the humidity control circuit (80a, 80b) flows into the second adsorption heat exchanger (82a, 82b) and condenses after passing through the four-way switching valve (83a, 83b). The refrigerant flowing out of the second adsorption heat exchanger (82a, 82b) is reduced in pressure when passing through the humidity control expansion valves (84a, 84b) to become a low-pressure refrigerant, and then the first adsorption heat exchanger (81a, 81b) evaporates. The refrigerant that has flowed out of the first adsorption heat exchanger (81a, 81b) passes through the four-way switching valve (83a, 83b) and then flows into the low-pressure side connection pipe (62), and then to the humidity control compressor (71). Inhaled and compressed.

  Further, as shown in FIG. 2B, in the humidity control unit (52a, 52b) in the second operation, the indoor air is sent to the second adsorption heat exchanger (82a, 82b), and the outdoor air is the first. It is sent to the adsorption heat exchanger (81a, 81b). In the second adsorption heat exchanger (82a, 82b), moisture desorbed from the heated adsorbent is given to the room air. The room air humidified when passing through the second adsorption heat exchanger (82a, 82b) is sucked into the exhaust fan (54a, 54b) and then discharged to the outside. On the other hand, in the first adsorption heat exchanger (81a, 81b), moisture in the outdoor air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The outdoor air dehumidified when passing through the first adsorption heat exchanger (81a, 81b) is sucked into the air supply fan (53a, 53b) and then supplied into the room.

  The humidification operation of the outside air processor (50) will be described with reference to FIG. During the humidification operation, each of the humidity control units (52a, 52b) alternately performs the first operation and the second operation every predetermined time (for example, every 3 minutes). Note that the timing of mutual switching between the first operation and the second operation in each humidity control unit (52a, 52b) does not need to be synchronized with each other.

  As shown in FIG. 3A, in the humidity control unit (52a, 52b) in the first operation, the four-way switching valve (83a, 83b) is set to the first state, and the humidity control expansion valve (84a, 84b). ) Is appropriately adjusted. In the humidity control circuit (80a, 80b) during the first operation, the first adsorption heat exchanger (81a, 81b) operates as a condenser, and the second adsorption heat exchanger (82a, 82b) is an evaporator. Works as. In the first adsorption heat exchanger (81a, 81b), the adsorbent supported on the surface is heated by the refrigerant. In the second adsorption heat exchanger (82a, 82b), the adsorbent carried on the surface is cooled by the refrigerant. The refrigerant flow in the humidity control circuit (80a, 80b) during the first operation is the same as the refrigerant flow in the humidity control circuit (80a, 80b) during the first operation of the dehumidifying operation.

  Further, as shown in FIG. 3A, in the humidity control unit (52a, 52b) in the first operation, outdoor air is sent to the first adsorption heat exchanger (81a, 81b), and the indoor air is second. It is sent to the adsorption heat exchanger (82a, 82b). In the first adsorption heat exchanger (81a, 81b), moisture desorbed from the heated adsorbent is given to the outdoor air. The outdoor air humidified when passing through the first adsorption heat exchanger (81a, 81b) is sucked into the air supply fan (53a, 53b) and then supplied into the room. On the other hand, in the second adsorption heat exchanger (82a, 82b), moisture in the room air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant. The room air dehumidified when passing through the second adsorption heat exchanger (82a, 82b) is sucked into the exhaust fan (54a, 54b) and then discharged to the outside.

  As shown in FIG. 3B, in the humidity control unit (52a, 52b) in the second operation, the four-way switching valve (83a, 83b) is set to the second state, and the humidity control expansion valve (84a, 84b). ) Is appropriately adjusted. In the humidity control circuit (80a, 80b) during the second operation, the second adsorption heat exchanger (82a, 82b) operates as a condenser, and the first adsorption heat exchanger (81a, 81b) is an evaporator. Works as. In the second adsorption heat exchanger (82a, 82b), the adsorbent supported on the surface is heated by the refrigerant. In the first adsorption heat exchanger (81a, 81b), the adsorbent carried on the surface is cooled by the refrigerant. The refrigerant flow in the humidity control circuit (80a, 80b) during the second operation is the same as the refrigerant flow in the humidity control circuit (80a, 80b) during the second operation of the dehumidifying operation.

  Further, as shown in FIG. 3B, in the humidity control unit (52a, 52b) in the second operation, the outdoor air is sent to the second adsorption heat exchanger (82a, 82b), and the room air is the first. It is sent to the adsorption heat exchanger (81a, 81b). In the second adsorption heat exchanger (82a, 82b), moisture desorbed from the heated adsorbent is given to the outdoor air. The room air humidified when passing through the second adsorption heat exchanger (82a, 82b) is sucked into the air supply fan (53a, 53b) and then supplied into the room. On the other hand, in the first adsorption heat exchanger (81a, 81b), moisture in the room air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The room air dehumidified when passing through the first adsorption heat exchanger (81a, 81b) is sucked into the exhaust fan (54a, 54b) and then discharged to the outside.

<Operation of control system>
The operation of the control system (90) constituted by the air conditioning controller (91) and the humidity controller (92a, 92b) will be described. Here, the operation of the control system (90) when the air conditioner (20) performs the cooling operation and the outside air processing device (50) performs the dehumidifying operation will be described with reference to the flowchart of FIG.

  When the user operates a power button provided on the remote controller (not shown), the air conditioning system (10) is turned on. When the power of the air conditioning system (10) is turned on, in step ST1, the target value of the indoor air temperature (target indoor temperature Ts) and the target value of the relative humidity of the indoor air (target indoor humidity Hs) are Input from the remote controller to the humidity control side controller (92a) of one humidity control unit (52a). In the next step ST2, the humidity controller (92a) activates the air supply fan (53a) and the exhaust fan (54a) provided in the first humidity control unit (52a). When the air supply fan (53a) and the exhaust fan (54a) are activated, indoor air and outdoor air are taken into the first humidity control unit (52a).

  In step ST3, the humidity controller (92a) reads the measured values of the temperature sensor (55a, 57a) and the humidity sensor (56a, 58a) provided in the first humidity control unit (52a). In other words, the humidity controller (92a) has the measured value Tr of the indoor temperature sensor (55a) (that is, the measured value of the temperature of the indoor air) and the measured value Hr of the indoor humidity sensor (56a) (that is, the value of the indoor air). Actual measured value of relative humidity), measured value To of outdoor temperature sensor (57a) (ie, measured value of outdoor air temperature), and measured value Ho of outdoor humidity sensor (58a) (ie, relative humidity of outdoor air). Measured value). Then, the humidity controller (92a) calculates the target dehumidification amount, calculates the dew point temperature Tdp of the indoor air, and sets the target value (target evaporation temperature Tes) of the evaporation temperature in the air conditioning refrigerant circuit (30). I do.

  Specifically, the humidity controller (92a) calculates the dehumidification amount required for each humidity control unit (52a, 52b) using the target indoor humidity Hs and the measured value Ho of the outdoor humidity sensor (58a). The value is set as the target dehumidification amount. The humidity controller (92a) calculates the dew point temperature Tdp of the room air using the measured value Tr of the room temperature sensor (55a) and the measured value Hr of the room humidity sensor (56a). Further, the humidity control side controller (92a) sets the target evaporation temperature Tes in the air conditioning refrigerant circuit (30) using the target indoor temperature Ts and the measured value Tr of the indoor temperature sensor (55a). At that time, the humidity controller (92a) sets the value of the target evaporation temperature Tes to a value higher than the dew point temperature Tdp of the room air.

  An operation in which the humidity controller (92a) sets the target evaporation temperature Tes will be described. The humidity adjustment side controller (92a) calculates a temporary target value of the refrigerant evaporation temperature using the target indoor temperature Ts, the measured value Tr of the indoor temperature sensor (55a), etc., and a predetermined correlation equation, etc. Is compared with a reference value set to a value (Tdp + γ) higher than the dew point temperature Tdp of the room air. The value of “γ” is set to “1 ° C.”, for example. Then, if the temporary target value of the calculated refrigerant evaporation temperature is higher than the reference value (Tdp + γ), the humidity control side controller (92a) sets the calculated temporary target value as the target evaporation temperature Tes, while If the target value is equal to or less than the reference value, the reference value (Tdp + γ) is set as the target evaporation temperature Tes. The humidity control controller (92a) transmits the set target evaporation temperature Tes to the air conditioning controller (91).

  When step ST3 ends, step ST4 and step ST6 are executed in parallel.

  In step ST4, the air conditioning controller (91) activates the air conditioning compressor (41) to cause the air conditioner (20) to start the cooling operation. In step ST5 following step ST4, the air-conditioning controller (91) reads the measured value LP of the low-pressure sensor (27) (that is, the actual value of the pressure of the refrigerant sucked into the air-conditioning compressor (41)). The refrigerant evaporation temperature Te in the air conditioning refrigerant circuit (30) is calculated using the measured value LP of the low pressure sensor (27).

 In step ST4, the air conditioning controller (91) adjusts the operating capacity of the air conditioning compressor (41) so that the calculated refrigerant evaporation temperature Te becomes the target evaporation temperature Tes. Specifically, the air conditioning side controller (91) lowers the operating frequency of the air conditioning compressor (41) when the calculated refrigerant evaporation temperature Te is lower than the target evaporation temperature Tes, and the calculated refrigerant evaporation temperature Te is the target. When the temperature exceeds the evaporation temperature Tes, the operating frequency of the air conditioning compressor (41) is raised.

  On the other hand, in step ST6, the humidity control controller (92a) activates the humidity control compressor (71) to cause the outside air processor (50) to start the dehumidifying operation. In step ST7 following step ST6, the humidity controller (92a) calculates the dehumidification amount required for the humidity control unit (52a, 52b), and adjusts the humidity so that the calculated value of the dehumidification amount becomes the target dehumidification amount. Adjust the operating capacity of the compressor (71). Specifically, when the calculated value of the dehumidification amount exceeds the target dehumidification amount, the humidity control side controller (92a) reduces the operating frequency of the humidity control compressor (71), and the calculated value of the dehumidification amount is set to the target dehumidification amount. If the amount is lower, increase the operating frequency of the humidity control compressor (71).

  When step ST5 and step ST7 are complete | finished, it transfers to step ST8 and the humidity control side controller (92a) performs the same operation | movement as the operation | movement in step ST3. That is, the humidity controller (92a) reads the measured values of the indoor temperature sensor (55a), the indoor humidity sensor (56a), the outdoor temperature sensor (57a), and the outdoor humidity sensor (58a), and calculates the target dehumidification amount. The calculation of the dew point temperature Tdp of the room air and the setting of the target value (target evaporation temperature Tes) of the evaporation temperature in the air conditioning refrigerant circuit (30) are performed.

  When step ST8 ends, step ST9 and step ST11 are executed in parallel.

  In step ST9, the air conditioning controller (91) reads the measured value Tr of the indoor temperature sensor (55a), subtracts the target indoor temperature Ts from this measured value Tr, and a predetermined reference value “ Compare with -α ". Note that the value of “α” is set to “1 ° C.”, for example.

  When “Tr−Ts” is larger than “−α” in step ST9 (Tr−Ts> −α), the temperature of the room air is not sufficiently lowered, and therefore the room air needs to be continuously cooled. It can be judged that there is. Therefore, in this case, the control system (90) returns to step ST5, and thereafter executes step ST8 and step ST9 in order. That is, if “Tr−Ts” continues to be larger than “−α”, the control system (90) repeatedly executes step ST5, step ST8, and step ST9 every predetermined time (for example, every 15 seconds). Is done.

  On the other hand, when “Tr−Ts” is equal to or less than “−α” in step ST9 (Tr−Ts ≦ −α), the temperature of the room air has sufficiently decreased, and therefore it is not necessary to continue cooling the room air. I can judge. In this case, the control system (90) moves to step ST10. In step ST10, the air conditioning controller (91) stops the air conditioning compressor (41). The air conditioning controller (91) also stops the outdoor fan (23) and the indoor fans (24a to 24d) together.

  In step ST11, the humidity controller (92a) reads the measured value Hr of the indoor humidity sensor (56a), subtracts the target indoor humidity Hs from this measured value Hr, and a predetermined reference value. Compare with “−β”. Note that the value of “β” is set to “3%”, for example.

  If “Hr−Hs” is larger than “−β” in step ST11 (Hr−Hs> −β), the relative humidity of the indoor air is not sufficiently lowered, and therefore the outdoor air supplied to the room is dehumidified. It can be determined that it is necessary to continue. Therefore, in this case, the control system (90) returns to step ST7, and then executes step ST8 and step ST11 in order. That is, if “Hr−Hs” continues to be larger than “−β”, the control system (90) repeatedly executes step ST7, step ST8, and step ST11 at predetermined time intervals (for example, every 15 seconds). Is done.

  On the other hand, if “Hr−Hs” is equal to or lower than “−β” in step ST9 (Hr−Hs ≦ −β), the relative humidity of the indoor air is sufficiently lowered, and therefore the outdoor air supplied to the room is dehumidified. It can be determined that there is no need to continue. Therefore, in this case, the control system (90) moves to step ST12. In step ST12, the humidity control controller (92a) stops the humidity control compressor (71). However, the humidity controller (92a) needs to continue ventilation in the room, so the air supply fan (53a, 53b) and exhaust fan (54a, 54b) of each humidity control unit (52a, 52b) Continue driving.

  When the air conditioning controller (91) stops the air conditioning compressor (41) in step ST10, or when the humidity control controller (92a) stops the humidity control compressor (71) in step ST12, Step ST13 is executed. In step ST13, the humidity controller (92a) performs the same operation as the operation in step ST3. That is, the humidity controller (92a) reads the measured values of the indoor temperature sensor (55a), the indoor humidity sensor (56a), the outdoor temperature sensor (57a), and the outdoor humidity sensor (58a), and calculates the target dehumidification amount. The calculation of the dew point temperature Tdp of the room air and the setting of the target value (target evaporation temperature Tes) of the evaporation temperature in the air conditioning refrigerant circuit (30) are performed.

  When the control system (90) reaches step ST13 via step ST10, the control system (90) subsequently proceeds to step ST14. In step ST14, the air conditioning side controller (91) reads the measured value Tr of the indoor temperature sensor (55a), subtracts the target indoor temperature Ts from this measured value Tr, and a predetermined reference value “ Compare with α ″.

  If “Tr−Ts” is less than “α” in step ST14 (Tr−Ts <α), it can be determined that the temperature of the room air remains sufficiently low and therefore it is not necessary to restart the cooling of the room air. . Therefore, in this case, the control system (90) returns to step ST13 while keeping the air conditioner (20) in a dormant state, and once the humidity controller (92a) performs a predetermined operation, the control system (90) proceeds to step ST14 again. In other words, if “Tr−Ts” continues to be less than “α”, the control system (90) repeatedly executes step ST13 and step ST14 every predetermined time (for example, every 15 seconds).

  On the other hand, when “Tr−Ts” is equal to or higher than “α” in step ST14 (Tr−Ts ≧ α), it is determined that the temperature of the room air has increased, and therefore it is necessary to restart the cooling of the room air. it can. Therefore, in this case, the control system (90) moves to step ST15. In step ST15, the air conditioning controller (91) activates the air conditioning compressor (41). The air conditioning controller (91) also activates the outdoor fan (23) and the indoor fans (24a to 24d). Thereafter, the control system (90) returns to step ST5. In the control system (90), step ST5, step ST8, and step ST9 are repeated until “Tr−Ts” is determined to be equal to or less than “−α” (Tr−Ts ≦ −α) in step ST9. Are repeatedly executed in order.

  When the control system (90) reaches step ST13 via step ST12, the control system (90) subsequently proceeds to step ST16. In step ST16, the humidity controller (92a) reads the measured value Hr of the indoor humidity sensor (56a), subtracts the target indoor humidity Hs from this measured value Hr, and a predetermined reference value. Compare with “β”.

  When “Hr−Hs” is less than “β” in step ST16 (Hr−Hs <β), the relative humidity of the room air remains sufficiently low, and therefore the dehumidification of the outdoor air supplied to the room is resumed. It can be judged that it is not necessary. Therefore, in this case, the control system (90) returns to step ST13 while keeping the outside air processing device (50) in a dormant state, and once the humidity controller (92a) performs a predetermined operation, the control system (90) moves again to step ST16. . That is, if the state where “Hr−Hs” is less than “β” continues, step ST13 and step ST16 are repeatedly executed at predetermined time intervals (for example, every 15 seconds) in the control system (90).

  On the other hand, if “Hr−Hs” is equal to or higher than “β” in step ST16 (Hr−Hs ≧ β), the relative humidity of the indoor air has increased, and therefore dehumidification of the outdoor air supplied to the room is resumed. It can be determined that it is necessary. Therefore, in this case, the control system (90) moves to step ST17. In step ST17, the humidity controller (92a) activates the humidity control compressor (71). Thereafter, the control system (90) returns to step ST7. Then, in the control system (90), until “Hr−Hs” is determined to be “−β” or less (Hr−Hs ≦ −β) again in step ST11, steps ST7, ST8, and ST11 are performed. Are repeatedly executed in order.

-Effect of Embodiment 1-
In the air conditioning system (10) of the present embodiment, the outdoor air processor (50) adjusts the humidity of the air supplied to the room, while the air conditioner (20) during the cooling operation has a refrigerant evaporation temperature of the room air. It is kept above the dew point temperature. As described above, the air conditioning system (10) of the present embodiment has a characteristic that the air conditioner (20) only needs to adjust the temperature of the air because the outside air processor (50) adjusts the humidity of the air. Therefore, in the present embodiment, the refrigerant evaporation temperature in the air conditioner (20) during the cooling operation is maintained at a value higher than the dew point temperature of the room air, and only the air temperature is adjusted in the air conditioner (20). Yes. For this reason, in the air conditioning refrigerant circuit (30) of the air conditioner (20), the refrigerant evaporating temperature is higher than when the air is dehumidified in the indoor units (22a to 22d) of the air conditioner (20). Can be set to

  Therefore, according to this embodiment, the low pressure (that is, the refrigerant evaporation pressure) in the air conditioning refrigerant circuit (30) of the air conditioner (20) during the cooling operation can be set high, and the air conditioning refrigerant circuit ( 30) can reduce the difference between the high and low pressures of the refrigeration cycle. As a result, the power consumption of the air conditioning compressor (41) of the air conditioning refrigerant circuit (30) can be reduced, and the operating efficiency of the air conditioner (20) can be improved.

<< Embodiment 2 of the Invention >>
A second embodiment of the present invention will be described. In the present embodiment, the operation performed by the control system (90) in the air conditioning system (10) of the above embodiment is changed. Here, the control system (90) of the present embodiment will be described with respect to differences from the first embodiment.

  In the present embodiment, the humidity controller (92a) provided in the first humidity control unit (52a) is provided in each indoor unit (22a to 22d) in addition to the operation performed in the first embodiment. It is comprised so that the operation | movement which sets the target value (target air volume) of the ventilation volume of an indoor fan (24a-24d) may be performed. The humidity control controller (92a) transmits the set target air volume of the indoor units (22a to 22d) to the air conditioning controller (91). Moreover, in this embodiment, the air-conditioning side controller (91) is a rotational speed of each indoor fan (24a-24d) based on the target air volume of the indoor unit (22a-22d) transmitted from the humidity control side controller (92a). It is comprised so that the operation | movement which adjusts may be performed.

-Control system operation-
Operations performed by the control system (90) of the present embodiment will be described.

  As shown in the flowchart of FIG. 5, in the operation performed by the control system (90) of the present embodiment, the operations in step ST3 and step ST5 are different from the operations in the first embodiment. Here, the operation performed by the control system (90) of the present embodiment will be described with respect to differences from the operation performed by the first embodiment and the control system (90).

  In step ST3, in addition to the operation performed by the humidity controller (92a) in step ST3 of the control system (90) of the first embodiment, the humidity controller (92a) controls each indoor unit (22a to 22d). The operation | movement which sets the target value (target air volume) of the ventilation volume of the provided indoor fan (24a-24d) is performed.

  An operation in which the humidity controller (92a) sets the target air volume of the indoor fans (24a to 24d) will be described. In step ST3, the humidity controller (92a) sets the target evaporation temperature Tes in the air conditioning refrigerant circuit (30) to a value higher than the dew point temperature Tdp of the room air, as in the first embodiment. And the humidity control side controller (92a) sets the target air volume of the indoor fans (24a-24d) according to this target evaporation temperature Tes, and transmits the set target air volume to the air conditioning side controller (91).

  As described above, the humidity controller (92a) sets the target evaporation temperature Tes to a value higher than the dew point temperature Tdp of the room air. For this reason, when the dew point temperature Tdp of the indoor air increases, the target evaporation temperature Tes also increases accordingly. When the target evaporation temperature Tes in the air conditioning refrigerant circuit (30) increases, the temperature difference between the refrigerant and air in the indoor heat exchangers (36a to 36d) during the cooling operation decreases, and the indoor units (22a to 22d) The resulting cooling capacity may be reduced.

  On the other hand, even if the temperature difference between the refrigerant and air in the indoor heat exchanger (36a to 36d) during cooling operation becomes small, if the flow rate of air passing through the indoor heat exchanger (36a to 36d) is increased, indoor heat exchange In the chambers (36a to 36d), a decrease in the amount of heat that the refrigerant absorbs from the air can be suppressed. Therefore, the humidity control side controller (92a) increases the air volume of the air passing through the indoor heat exchangers (36a to 36d) as the target evaporation temperature Tes in the air conditioning refrigerant circuit (30) increases. Increase the target airflow value (24a-24d). The humidity controller (92a) performs this operation as a capability holding operation.

  In step ST5, the air conditioning controller (91) controls the rotational speed of the indoor fans (24a to 24d) in addition to controlling the operating capacity of the air conditioning compressor (41). Specifically, the air-conditioning controller (91) is configured so that the flow rate of air supplied to the indoor heat exchangers (36a to 36d) by the indoor fans (24a to 24d) is transmitted from the humidity controller (92a). The rotational speed of the indoor fans (24a to 24d) is adjusted so that

-Effect of Embodiment 2-
In the present embodiment, the humidity control controller (92a) of the control system (90) performs the capacity maintaining operation to increase the passing air volume of the indoor heat exchangers (36a to 36d) serving as an evaporator, thereby allowing the air conditioning refrigerant circuit Even in the state where the evaporation temperature of the refrigerant in (30) is a relatively high value, the decrease in the cooling capacity of the indoor units (22a to 22d) is suppressed. Therefore, according to the present embodiment, in the state where the evaporation temperature of the refrigerant in the air conditioning refrigerant circuit (30) is set to a value higher than the dew point temperature of the room air (that is, a value higher than that of a general air conditioner). However, it is possible to secure the comfort of the room by suppressing the decrease in the cooling capacity of the air conditioner (20).

-Modification of Embodiment 2-
The control system (90) of the present embodiment may be configured to perform an operation for forcibly increasing the number of operated units among the indoor units (22a to 22d) as a power holding operation.

  By the way, in an air conditioner (20) including a plurality of indoor units (22a to 22d), the user may be able to individually command the operation and stop of each indoor unit (22a to 22d) by operating a remote controller. In such a case, it is possible that only a part of the indoor units (22a to 22d) provided in the air conditioner (20) is operated and the rest remains stopped. The control system (90) of the present modification is effective for the air conditioner (20) that can individually set the operation and stop of such indoor units (22a to 22d).

  Here, in the capacity maintaining operation performed by the humidity controller (92a) of the control system (90) of this modification, only the operation of the first and second indoor units (22a, 22b) is commanded by the user Will be described as an example. In this state, the humidity controller (92a) forcibly increases the number of indoor units (22a to 22d) to be operated as the target evaporation temperature Tes in the air conditioning refrigerant circuit (30) increases. Is performed as an ability retention operation. In other words, when the humidity controller (92a) determines that the target evaporation temperature Tes becomes too high and the first and second indoor units (22a, 22b) alone cannot provide sufficient cooling capacity, The third indoor unit (22c) to which the operation command from the user is not input is forcibly activated. If the humidity controller (92a) still determines that sufficient cooling capacity cannot be obtained, the humidity control side controller (92a) also forcibly starts the fourth indoor unit (22d).

  As described above, in this modification, the humidity control controller (92a) of the control system (90) performs the capacity maintaining operation and increases the number of indoor units (22a to 22d) to be operated, whereby the air conditioning refrigerant circuit (30 ), It is possible to suppress a decrease in the cooling capacity of the air conditioner (20) even in a state in which the evaporation temperature of the refrigerant becomes a relatively high value.

<< Other Embodiments >>
-First modification-
As shown in FIG. 6, in each of the above-described embodiments, one humidity control compressor (71a, 71b) may be mounted on each humidity control unit (52a, 52b). In the air conditioning system (10) shown in FIG. 6, the outside air processing device (50) is configured by only two humidity control units (52a, 52b). In the humidity control circuit (80a, 80b) of each humidity control unit (52b), the humidity control compressor (71a, 71b) has its discharge side connected to the first port of the four-way switching valve (83a, 83b). The suction side is connected to the second port of the four-way switching valve (83a, 83b) via the accumulator (72a, 72b).

-Second modification-
As shown in FIG. 7, in each of the above embodiments, the compressor (41) provided in the outdoor circuit (40) of the outdoor unit (21) also serves as the humidity control compressor (71) in FIG. Also good. In the air conditioning system (10) shown in FIG. 7, one outdoor unit (21), four indoor units (22a-22d), and two humidity control units (52a, 52b) are connected by piping. Thus, one refrigerant circuit (15) is formed.

  Specifically, in this modification, the high-pressure side closing valve (73) and the low-pressure side closing valve (74) of the outdoor circuit (40) are connected. In the outdoor circuit (40) of this modification, the high-pressure side closing valve (73) is connected to a pipe connecting the discharge side of the compressor (41) and the four-way switching valve (43), and the low-pressure side closing valve (74) is an accumulator. (42) and a pipe connecting the four-way selector valve (43). As in the first embodiment, the high-pressure side connection pipe (61) is connected to the high-pressure side closing valve (73), and the low-pressure side connection pipe (62) is connected to the low-pressure side closing valve (74).

-Third modification-
In the air conditioning system (10) of each embodiment described above, all the indoor units (22a to 22d) and all the humidity control units (52a, 52b) are arranged to supply air to the same indoor space. Some of the indoor units (22a to 22d) or some of the humidity control units (52a, 52b) may be arranged to supply air to an indoor space different from the other units. That is, in the air conditioning system (10) of each of the above embodiments, at least one of the four indoor units (22a to 22d) and at least one of the two humidity control units (52a, 52b) are the same. What is necessary is just to arrange | position so that air may be supplied to indoor space.

  For example, in the air conditioning system (10) of each of the above embodiments, the first and second indoor units (22a, 22b) and the first and second humidity control units (52a, 52b) enter the same indoor space. The third and fourth indoor units (22c, 22d) are arranged so as to supply air to an indoor space different from these units (22a, 22b, 52a, 52b). It may be.

  In the air conditioning system (10) of each of the above embodiments, the first to fourth indoor units (22a to 22d) and the second humidity control unit (52b) supply air to the same indoor space. On the other hand, the 1st humidity control unit (52a) may be arrange | positioned so that air may be supplied to indoor space different from these units (22a-22d, 52b). In this case, the humidity control side controller (92b) of the second humidity control unit (52b) arranged to supply air to the same indoor space as the indoor units (22a to 22d) is the first embodiment. 2 and 2, the same operation as the operation performed by the humidity controller (92a) of the first humidity control unit (52a) is executed.

  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 an air conditioning system including a humidity control device and a temperature control device.

It is a refrigerant circuit figure showing the schematic structure of the air-conditioning system of Embodiment 1. It is a schematic block diagram of the humidity control unit which shows the state in dehumidification driving | operation, Comprising: (A) shows the state in 1st operation | movement, (B) shows the state in 2nd operation | movement. It is a schematic block diagram of the humidity control unit which shows the state in humidification driving | operation, Comprising: (A) shows the state in 1st operation | movement, (B) shows the state in 2nd operation | movement. It is a flowchart which shows operation | movement of the control system of Embodiment 1. It is a flowchart which shows operation | movement of the control system of Embodiment 2. It is a refrigerant circuit figure which shows schematic structure of the air conditioning system of the 1st modification of other embodiment. It is a refrigerant circuit figure which shows schematic structure of the air conditioning system of the 2nd modification of other embodiment.

Explanation of symbols

10 Air conditioning system
20 Air conditioner (temperature control device)
30 Air conditioning refrigerant circuit
41 Air conditioning compressor
50 Outside air processing machine (humidity control device)
55a Indoor temperature sensor
56a Indoor humidity sensor
90 Control system (control means)
92a Humidity controller

Claims (4)

A humidity controller (50) that adjusts the humidity of air using an adsorbent and a temperature controller (20) that controls the temperature of air using the refrigerant in the refrigerant circuit (30) that performs the refrigeration cycle The air conditioning system supplies the air whose humidity is adjusted by the humidity adjusting device (50) and the air whose temperature is adjusted by the temperature adjusting device (20) to the indoor space,
The temperature control device (20) is configured to be capable of performing a cooling operation for supplying air cooled in the evaporator of the refrigerant circuit (30) into the room,
Dew point temperature detecting means (55a, 56a, 92a) for detecting the dew point temperature of indoor air;
The operating state of the temperature control device (20) during the cooling operation is detected by the dew point temperature detecting means (55a, 56a, 92a) based on the evaporation temperature of the refrigerant in the refrigerant circuit (30) of the temperature control device (20). Control means (90) which adjusts so that it may be kept at a value higher than a value, An air-conditioning system characterized by things. In claim 1,
During the cooling operation of the temperature control device (20), the control means (90) controls the operating capacity of the compressor (41) provided in the refrigerant circuit (30) of the temperature control device (20). The refrigerant evaporating temperature in the circuit (30) is adjusted to a predetermined target evaporating temperature, and the target evaporating temperature is set to a value higher than the detected value of the dew point temperature detecting means (55a, 56a, 92a). An air conditioning system characterized by being configured as described above. In claim 2,
During the cooling operation of the temperature control device (20), the control means (90) evaporates the temperature control device (20) as the target evaporation temperature increases in order to suppress a decrease in cooling capacity. An air conditioning system configured to perform an ability holding operation for increasing a flow rate of air passing through a vessel. In claim 2,
While the temperature control device (20) includes a plurality of indoor units (22a to 22d) each having a heat exchanger (36a to 36d) serving as an evaporator during the cooling operation,
During the cooling operation of the temperature control device (20), the control means (90) controls the plurality of indoor units (22a to 22d) as the target evaporation temperature increases in order to suppress a decrease in cooling capacity. The air conditioning system is configured to perform an ability holding operation to increase the number of operated ones.

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