JP2014137207A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress energy consumption to a minimum required level in an air conditioning system including an air conditioner and an outdoor-air treatment device.SOLUTION: An air conditioning system (10) comprises: an air conditioner (20); an outdoor-air treatment device (50); and a control system (90). The control system (90) includes: a determination unit (93a) determining whether a temperature and a humidity of outdoor air are in a state in a predetermined ventilation range; a minimum energy control unit (93b) controlling the air conditioner (20) and the outdoor-air treatment device (50) to operate to minimize a sum of consumption energy of the devices (20, 50) so that indoor air and the outdoor air are in the states of the ventilation range if the outdoor air is not in the state in the ventilation range; and a ventilation operation control unit (93c) controlling the outdoor-air treatment device (50) to perform a ventilation operation if the outdoor air is in the state in the ventilation range.

Description

    The present invention relates to an air conditioning system including an air conditioner that adjusts the temperature of indoor air and an outdoor air processing device that adjusts the temperature or temperature and humidity of outdoor air supplied to the room.

    2. Description of the Related Art Conventionally, an air conditioning system including an air conditioner and an outside air processing device is known. For example, Patent Literature 1 discloses an air conditioning system including an air conditioner provided with a refrigerant circuit that performs a refrigeration cycle, and an outside air processing device that adjusts the humidity of air using a desiccant rotor. Patent Documents 2 and 3 disclose an outside air treatment 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 an air conditioner provided with a circuit is disclosed. In this type of air conditioning system, the air conditioner adjusts the temperature of the captured indoor air and supplies the indoor air whose temperature has been adjusted to the room. The outdoor air processing device adjusts the temperature and humidity of the taken outdoor air, and supplies the outdoor air adjusted in temperature and humidity to the room.

    The outdoor air processing devices disclosed in these patent documents adjust the temperature and humidity of the outdoor air taken in. For this reason, in an air conditioning system provided with this outside air processing device, the indoor air temperature may be changed even when the outside air processing device supplies outdoor air whose temperature and humidity are adjusted to the room. Therefore, in the air conditioning system disclosed in Patent Document 2, the room temperature is set to a set value by considering the operating state of the outside air processing device when controlling the capacity of the compressor provided in the refrigerant circuit of the air conditioner. The time to reach is shortened.

JP 09-318126 A JP 2005-291585 A JP 2006-329471 A

    As described above, in an air conditioning system provided with an outdoor air processing device that adjusts both the temperature and humidity of outdoor air, the indoor air temperature may be changed even by the outdoor air processing device. It is not necessary to treat only with the air conditioner. On the other hand, the operating efficiency of the air conditioner and the outside air treatment device is usually not always the same. For this reason, even if the air conditioning capacity exhibited by the entire air conditioning system is the same, if the proportion of the indoor air conditioning load processed by the air conditioning device and the amount processed by the outside air processing device are different, the air conditioning device The sum of the energy consumed by the outdoor air processing apparatus and the energy consumed by the outside air processing device (that is, the energy consumption of the entire air conditioning system) may be different.

    However, conventionally, operation control of the air conditioning system in consideration of such circumstances has not been performed. For this reason, in the conventional air conditioning system, the proportion of the air conditioning load that is processed by the air conditioning device and the amount that is processed by the outside air processing device is not optimized in the indoor air conditioning load, and wasteful energy may be consumed. was there.

    In addition, in the outdoor air processing apparatus that reduces the temperature of the outdoor air to the dew point temperature and dehumidifies it, then heats it to the desired temperature and supplies it to the room, if the outdoor air is in a state close to the state of the room air, There is a possibility that wasteful energy may be consumed by wasteful cooling to a temperature below the dew point temperature and reheating.

    This invention is made | formed in view of this point, The objective is to suppress the energy consumption to the minimum necessary in the air conditioning system provided with the air conditioning apparatus and the external air processing apparatus.

    The first aspect of the present invention is an air conditioner (20) for supplying the indoor air taken into the room after adjusting its temperature at least, and supplying the outdoor air taken into the room after adjusting its temperature or temperature and humidity. Outdoor air processing device (50) for performing outdoor air processing operation and ventilation operation for supplying the outdoor air taken into the room as it is, and control means for controlling the operation of the air conditioner (20) and the outdoor air processing device (50) (90), wherein the control means (90) is configured to determine whether the temperature and humidity of the outdoor air are in a predetermined ventilation region, When the determination unit (93a) determines that the outdoor air is not in the ventilation region, the air conditioner (20) and the outdoor air processing device are configured so that the indoor air and the outdoor air are in the ventilation region. Drive (50), that A minimum energy control unit (93b) for controlling the operation so that the sum of the energy consumption of the air conditioner (20) and the energy consumption of the outside air processing device (50) is minimized, and the determination unit (93a), When it is determined that the outdoor air is in the ventilation region, at least a ventilation operation control unit (93c) that causes the outside air processing device (50) to perform the ventilation operation is provided.

    In the air conditioning system (10) of the first invention, the air conditioner (20) adjusts at least the temperature of the taken indoor air and supplies the adjusted indoor air to the room. The outdoor air processing device (50) adjusts the temperature or temperature and humidity of the taken outdoor air, and supplies the adjusted outdoor air to the room. The determination unit (93a) of the control means (90) determines whether the temperature and humidity of the outdoor air are in a predetermined ventilation region. When the determination unit (93a) determines that the outdoor air is in the ventilation region, the ventilation operation control unit (93c) performs the ventilation operation. On the other hand, when the determination unit (93a) determines that the outdoor air is not in the ventilation region, the minimum energy control unit (93b) calculates the sum of energy consumption of the air conditioner (20) and the outside air processing device (50). The operation of both devices (20, 50) is controlled so that is minimized. In other words, if it is not necessary to adjust the temperature or temperature and humidity of the outdoor air, ventilation operation is performed without adjusting the temperature or temperature and humidity of the outdoor air, and adjustment of the temperature or temperature and humidity of the outdoor air is necessary. In this case, since the operation of both devices (20, 50) is controlled so that the sum of energy consumption of the air conditioner (20) and the outside air processing device (50) is minimized, the air conditioning system (10) Energy consumption is minimized.

    According to a second aspect of the present invention, in the first aspect, the ventilation operation control unit (93c) includes the air conditioner (20) according to an indoor air conditioning load during the ventilation operation of the outside air treatment device (50). It is comprised so that the driving | operation may be controlled.

    In the second invention, when the ventilation operation is performed in the outside air processing device (50) by the ventilation operation control unit (93c), the operation of the air conditioner (20) is controlled according to the indoor air conditioning load. Is done. Therefore, the energy consumption of the air conditioning system (10) can be minimized.

    According to a third aspect of the present invention, in the first or second aspect, the minimum energy control unit (93b) includes a first target air conditioning capability that is an air conditioning capability to be exhibited by the air conditioner (20), and the outside air processing. The second target air conditioning capacity, which is the air conditioning capacity to be exhibited by the device (50), is set under the condition that the sum of the first target air conditioning capacity and the second target air conditioning capacity is equal to the air conditioning capacity required for the air conditioning system. Is determined so that the sum of the energy consumption of the air conditioner (20) and the energy consumption of the outside air treatment device (50) is minimized, and the air conditioner (20) exhibits the first target air conditioning capability. The operation of the air conditioner (20) is controlled as described above, and the operation of the outside air treatment device (50) is controlled so that the outside air treatment device (50) exhibits the second target air conditioning capability. ing.

    In the third invention, the minimum energy control unit (93b) determines the first target air conditioning capability and the second target air conditioning capability. The minimum energy control unit (93b) controls the operation of the air conditioner (20) so that the air conditioner (20) exhibits the first target air conditioning capability, and the outside air processing device (50) is the second target. The operation of the outside air processing device (50) is controlled so as to exert the air conditioning capability.

    Here, in order to cause the air conditioning system (10) to exert, for example, 30 kW of air conditioning capability, the air conditioner (20) exhibits 20 kW of air conditioning capability, and the outside air processing device (50) exhibits 10 kW of air conditioning capability. Alternatively, the air conditioner (20) may exhibit a 25 kW air conditioning capability, and the outside air treatment device (50) may exhibit a 5 kW air conditioning capability. On the other hand, the energy required to obtain an air conditioning capacity of 1 kW is usually different between the air conditioner (20) and the outside air treatment device (50). For this reason, in the above example, the air conditioner (20) exhibits an air conditioning capability of 20 kW and the outside air processing device (50) exhibits an air conditioning capability of 10 kW, and the air conditioner (20) is an air conditioner of 25 kW. Compared with the case where the outside air processing device (50) exhibits 5 kW air conditioning capability by exhibiting the capacity, the energy consumption of the entire air conditioning system (10) (that is, the energy consumed by the air conditioner (20) and the outside air processing) The sum of the energy consumed by the device (50) is not necessarily the same.

    Therefore, the minimum energy control unit (93b) of the control means (90) of the third invention is equal to the sum of the first target air conditioning capacity and the second target air conditioning capacity equal to the air conditioning capacity required for the entire air conditioning system (10). The first target air conditioning capability and the second target air conditioning capability are determined so that the sum of the energy consumption of the air conditioner (20) and the energy consumption of the outside air processing device (50) is minimized under the conditions of In other words, the minimum energy control unit (93b) includes the amount of air conditioning device (20) that is required by the air conditioning system (10) (first target air conditioning capability) and the outside air processing device (50). The amount to be exhibited (second target air conditioning capacity) is determined so that the energy consumption is minimized. When the air conditioner (20) exhibits the first target air conditioning capability and the outside air processing device (50) exhibits the second target air conditioning capability, the air conditioning capability exhibited by the air conditioning system (10) is the required value. In addition, the energy consumption of the air conditioning system (10) can be minimized.

    In a fourth aspect based on the third aspect, the minimum energy control unit (93b) includes first operating characteristic data indicating a relationship between air conditioning capability and energy consumption in the air conditioner (20), and the outside air processing. Second operation characteristic data indicating the relationship between the air conditioning capacity and energy consumption in the device (50) is stored in advance, and the first target air conditioning capacity and the second target are based on the first operation characteristic and the second operation characteristic. It is configured to determine the air conditioning capability.

    In the fourth invention, the minimum energy control unit (93b) stores the first operating characteristic data and the second operating characteristic data in advance. If the first operating characteristic data is used, the energy consumed in the air conditioner (20) exhibiting a certain air conditioning capability can be calculated. Further, by using the second operation characteristic data, it is possible to calculate the energy consumed in the outside air processing device (50) exhibiting a certain air conditioning capability. The minimum energy control unit (93b) calculates the energy consumption of the air conditioner (20) using the first operating characteristic data, while the energy consumption of the outside air processing device (50) uses the second operating characteristic data. And the first target air conditioning capability and the second target air conditioning capability are determined using the calculated values of the respective energy consumption.

    According to a fifth invention, in the third or fourth invention, the air conditioner (20) includes a first refrigerant circuit (30) connected to a compressor (41) to perform a refrigeration cycle, and the room air The indoor air temperature is adjusted by exchanging heat with the refrigerant in the first refrigerant circuit (30), and the outside air processing device (50) is connected to the compressor (71) to perform a refrigeration cycle. Two refrigerant circuits (101) are provided, and the temperature or temperature and humidity of the outdoor air is adjusted by exchanging heat of the taken outdoor air with the refrigerant of the second refrigerant circuit (101) during the outside air processing operation. Is configured to do.

    In 5th invention, a 1st refrigerant circuit (30) is provided in an air conditioning apparatus (20). When the compressor (41) connected to the first refrigerant circuit (30) is driven, the refrigerant circulates in the first refrigerant circuit (30) to perform a refrigeration cycle. The air conditioner (20) heats or cools the room air by exchanging heat between the room air and the refrigerant in the first refrigerant circuit (30).

    In the fifth invention, the outside air processing device (50) is provided with the second refrigerant circuit (60). When the compressor (71) connected to the second refrigerant circuit (60) is driven, the refrigerant circulates in the second refrigerant circuit (60) to perform a refrigeration cycle. The outdoor air processing device (50) adjusts the temperature and humidity of the outdoor air using the refrigerant in the second refrigerant circuit (60).

    In a sixth aspect based on the third or fourth aspect, the air conditioner (20) includes a first refrigerant circuit (30) to which a compressor (41) is connected to perform a refrigeration cycle, and the room air The indoor air temperature is adjusted by exchanging heat with the refrigerant in the first refrigerant circuit (30), and the outside air processing device (50) is connected to the compressor (71) to perform a refrigeration cycle. 2 refrigerant circuit (60) and an adsorbent cooled or heated by the refrigerant of the second refrigerant circuit (60), and adjusting the temperature and humidity of the outdoor air by bringing outdoor air into contact with the adsorbent Is configured to do.

    In the sixth invention, the air conditioner (20) is provided with the first refrigerant circuit (30). When the compressor (41) connected to the first refrigerant circuit (30) is driven, the refrigerant circulates in the first refrigerant circuit (30) to perform a refrigeration cycle. The air conditioner (20) heats or cools the room air by exchanging heat between the room air and the refrigerant in the first refrigerant circuit (30).

    In the sixth invention, the outside air processing device (50) is provided with the second refrigerant circuit (60). When the compressor (71) connected to the second refrigerant circuit (60) is driven, the refrigerant circulates in the second refrigerant circuit (60) to perform a refrigeration cycle. The outdoor air processing device (50) heats or cools the adsorbent with the refrigerant of the second refrigerant circuit (60), and brings the heated or cooled adsorbent into contact with the outdoor air, thereby adjusting the temperature and humidity of the outdoor air. Adjust.

    In a seventh aspect based on the fifth aspect, the ventilation region is set based on a predetermined neutral air zone that is in an air state close to the temperature and humidity of the room air.

    In the seventh invention, since the outdoor air in the predetermined neutral air zone is in a state close to the temperature and humidity of the indoor air, even if the indoor air is supplied to the room without adjusting the temperature or temperature and humidity, the temperature of the indoor space and Humidity does not fluctuate greatly. By setting the ventilation region based on such a neutral air zone, the ventilation region is easily set.

    In an eighth aspect based on any one of the fifth to seventh aspects, the control means (90) determines the operating capacity of the compressor (41) connected to the first refrigerant circuit (30) as the air. It adjusts so that a harmony device (20) may demonstrate the 1st above-mentioned air-conditioning capability, and the above-mentioned outside air processing device (50) is the above-mentioned operating capacity of the compressor (71,104) connected to the above-mentioned 2nd refrigerant circuit (60,101). It is comprised so that it may adjust so that the 2nd air conditioning capability may be exhibited.

    In the eighth invention, when the operating capacity of the compressor (41) connected to the first refrigerant circuit (30) changes, the circulation amount of the refrigerant in the first refrigerant circuit (30) changes, and the air conditioner (20 ) Changes the air conditioning capability. Therefore, the control means (90) adjusts the operating capacity of the compressor (41) connected to the first refrigerant circuit (30) so that the air conditioner (20) exhibits the first target air conditioning capability.

    In the eighth aspect of the invention, when the operating capacity of the compressor (71, 104) connected to the second refrigerant circuit (60, 101) changes, the amount of refrigerant circulating in the second refrigerant circuit (60, 101) changes, and the outside air processing device (50) changes the air conditioning capability. Therefore, the control means (90) adjusts the operating capacity of the compressor (71, 104) connected to the second refrigerant circuit (60, 101) so that the outside air processing device (50) exhibits the second target air conditioning capability.

    In a ninth aspect based on any one of the fifth to seventh aspects, the control means (90) is configured such that the evaporation temperature of the refrigerant in the first refrigerant circuit (30) is determined by the air conditioner (20). The operating capacity of the compressor (41) connected to the first refrigerant circuit (30) is adjusted so as to achieve a predetermined evaporation temperature that exhibits the first air conditioning capability, and the outside air processing device (50) So that the temperature of the outdoor air that is taken in and exchanges heat with the refrigerant in the second refrigerant circuit (101) becomes a predetermined temperature at which the outdoor air processing device (50) exhibits the second air conditioning capability. The operation capacity of the compressor (104) connected to the second refrigerant circuit (101) is adjusted.

    In the ninth aspect, when the operating capacity of the compressor (41) connected to the first refrigerant circuit (30) changes, the evaporation temperature of the refrigerant in the first refrigerant circuit (30) changes, and the air conditioner ( 20) The air-conditioning capacity that is exhibited changes. Therefore, the control means (90) sets the first evaporating temperature in the first refrigerant circuit (30) so that the evaporating temperature becomes a predetermined evaporating temperature at which the air conditioner (20) exhibits the first target air conditioning capability. 1 Adjust the operating capacity of the compressor (41) connected to the refrigerant circuit (30).

    In the ninth aspect, when the operating capacity of the compressor (104) connected to the second refrigerant circuit (101) changes, the temperature of the outdoor air that exchanges heat with the refrigerant in the second refrigerant circuit (101) It changes, and the air-conditioning capability which an outside air processing device (50) exhibits changes. Therefore, the control means (90) takes the temperature of the outdoor air taken into the outside air processing device (50) and exchanges heat with the refrigerant in the second refrigerant circuit (101), so that the outside air processing device (50) has the second target air conditioning capacity. The operating capacity of the compressor (71) connected to the second refrigerant circuit (60) is adjusted so that the temperature reaches a predetermined temperature.

    In a tenth aspect based on the first or second aspect, the minimum energy control section (93b) is configured to calculate a current value flowing through the air conditioner (20) and a current value flowing through the outside air processing device (50). The operation of the air conditioner (20) and the outside air treatment device (50) is configured to be PID controlled so that the sum is minimized.

    In a tenth aspect of the invention, the air conditioner (20) and the outside air treatment device (50) have a minimum total value of a current value flowing through the air conditioner (20) and a current value flowing through the outside air treatment device (50). The operation is controlled so that

    According to the first invention, the determination unit (93a) of the control means (90) determines whether the temperature and humidity of the outdoor air are in a predetermined ventilation region, and the outdoor air is in the ventilation region. When it is determined that the state is in the above state, the ventilation operation is controlled by the ventilation operation control unit (93c). That is, when it is not necessary to adjust the temperature of the outdoor air or the temperature and humidity, the ventilation operation is performed without adjusting the temperature and humidity. Therefore, since the outdoor air is not wastefully cooled and dehumidified and reheated, the energy consumed in the air conditioning system (10) can be minimized.

    Further, according to the first invention, when the determination unit (93a) determines that the outdoor air is not in the ventilation region, the minimum energy control unit (93b) determines that the air conditioner (20) And the operation of both devices (20, 50) is controlled so that the sum of the energy consumption of the outside air processing device (50) is minimized. Therefore, the energy consumed in the air conditioning system (10) can be minimized.

    Further, according to the second aspect of the invention, when the ventilation operation is performed in the outside air processing device (50), the ventilation operation control unit (93c) is configured to control the operation of the air conditioner (20) according to the indoor air conditioning load. ) Was configured. Therefore, the energy consumption of the air conditioning system (10) can be minimized.

    According to the third aspect of the invention, the minimum energy control unit (93b) determines that the sum of the first target air conditioning capacity and the second target air conditioning capacity is equal to the air conditioning capacity required for the entire air conditioning system (10). The first target air conditioning capability and the second target air conditioning capability are determined so that the sum of the energy consumption of the air conditioner (20) and the energy consumption of the outside air processing device (50) is minimized, and the air conditioner (20 ) Is configured to control both devices (20, 50) such that the first target air conditioning capability is exhibited and the outside air processing device (50) exhibits the second target air conditioning capability. Therefore, it is possible to suppress the energy consumed in the air conditioning system (10) to the minimum necessary while exhibiting the necessary and sufficient air conditioning capability for the air conditioning system (10).

    According to the seventh aspect, since the ventilation region is set based on the neutral air zone that is in an air state close to the temperature and humidity of the room air, the ventilation region can be easily set.

    According to the tenth aspect of the invention, the minimum energy control unit (93b) causes the total value of the current value flowing through the air conditioner (20) and the current value flowing through the outside air processing device (50) to be minimized. It was configured to control the operation of both devices (20, 50). Therefore, the energy consumed in the air conditioning system (10) can be suppressed to the minimum necessary by easy control.

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. FIG. 4 is a state transition diagram illustrating an operation of a minimum energy control unit according to the first embodiment. It is a humid air line figure for demonstrating the air-conditioning capability required for an external air process, and the air-conditioning capability required for indoor air conditioning. It is the 1st operation characteristic data which shows the characteristic of an air harmony device. It is the 2nd operation characteristic data which shows the characteristic of an outside air processing device. 6 is a table for explaining the operation of the minimum energy control unit of the first embodiment. It is a refrigerant circuit figure which shows schematic structure of the air conditioning system of the modification 2 of Embodiment 1. FIG. It is a refrigerant circuit diagram which shows schematic structure of the air conditioning system of Embodiment 2. It is a moist air diagram which shows seven air areas of the outdoor air which the judgment part of Embodiment 2 judges. FIG. 10 is a state transition diagram illustrating an operation of a minimum energy control unit according to the second embodiment. 6 is a flowchart illustrating a control operation of the control system according to the second embodiment. It is a humid air line figure for demonstrating the air-conditioning capability required for the external air process of Embodiment 2, and the air-conditioning capability required for indoor air conditioning.

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

Embodiment 1 of the Invention
The air conditioning system (10) of the first embodiment includes an air conditioner (20), an outside air processing device (50), and a cooperation controller (93). In this air conditioning system (10), the air conditioning controller (91) provided in the air conditioner (20) and the humidity controller (92a, 92b) provided in the outside air processing device (50) are linked. The control controller (93) constitutes a control system (90) which is a control means.

<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), the outdoor unit (21) and the indoor units (22a to 22d) are connected by piping to form an air conditioning refrigerant circuit (30) that is a first refrigerant circuit. 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 state is switched to a second state (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 device>
The outside air processing device (50) constituting the air conditioning system (10) includes one compressor unit (51) and two humidity control units (52a, 52b). In the outside air processing device (50), the compressor unit (51) and the humidity control units (52a, 52b) are connected by piping to form a humidity control refrigerant circuit (60) as a second refrigerant circuit. ing. 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 first port communicates with the fourth port and the second port communicates with the third port (the state shown in FIG. 2B).

    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 (55a, 56a,..., 55b, 56b,...) 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.

    In addition, the indoor space formed in each humidity control unit (52a, 52b) through which the indoor air suction ports and air outlets communicate with each other is the air inlets and air outlets of the indoor units (22a to 22d) of the air conditioner (20). It is the same space as the indoor space where the exit 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 is in communication 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 controller (91), the humidity controller (92a, 92b), and the linkage controller (93).

    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). The air conditioning controller (91) is configured to control the operation of the air conditioner (20). During the operation of the air conditioner (20), the air conditioning controller (91) controls the output frequency of the inverter connected to the air conditioning compressor (41), whereby the air conditioner (20) exerts air conditioning. Adjust ability.

    The humidity control controllers (92a, 92b) are housed one by one in the humidity control units (52a, 52b) of the outside air processing device (50). 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) is configured to control the operation of the humidity control compressor (71). During the operation of the outside air treatment device (50), the humidity controller (92a) controls the output frequency of the inverter connected to the humidity control compressor (71) so that the outside air treatment device (50) exhibits. Adjust the air conditioning capacity.

    The cooperation controller (93) includes a determination unit (93a), a minimum energy control unit (93b), and a ventilation operation control unit (93c). The linkage controller (93) includes indoor temperature sensors (55a, 55b), indoor humidity sensors (56a, 56b), outdoor temperature sensors (57a, 57b) provided in the humidity control units (52a, 52b), and Measurement values of the outdoor humidity sensors (58a, 58b) (that is, indoor temperature, indoor humidity, outdoor air temperature, outdoor air humidity) are input. Further, the cooperation controller (93) has a target value of the indoor air temperature (ie, the target indoor temperature Ts) and a target value of the relative humidity of the indoor air (ie, the target indoor humidity Hs) set by the user. Input via remote control not shown.

    The determination unit (93a) determines whether or not the outdoor air is in a predetermined ventilation region. In the present embodiment, the predetermined ventilation area is a predetermined humidity area set based on the target indoor humidity Hs, and the determination unit (93a) detects the outdoor air detected by the outdoor humidity sensors (58a, 58b). From the humidity, it is determined whether or not the outdoor air is in a predetermined ventilation region.

    When the determination unit (93a) determines that the outdoor air is not in the ventilation region, the minimum energy control unit (93b) performs minimum energy control. In the present embodiment, the minimum energy control unit (93b) is configured to sequentially perform five operations (first to fifth operations) as shown in FIG. 4 in the minimum energy control. The minimum energy control unit (93b) is configured to repeatedly perform the minimum energy control including the five operations shown in FIG. 4 every time a predetermined time elapses.

    Details of the first to fifth operations performed by the minimum energy control unit (93b) will be described later. Here, an outline of each operation will be described. The first operation is an operation for acquiring necessary data such as output values of the sensors (55a, 56a,...). The second operation is an operation for calculating the air conditioning capacity required for the entire air conditioning system (10) based on the data acquired in the first operation. The third action is based on the air conditioning capacity required for the entire air conditioning system (10) calculated in the second action, and the first target air conditioning capacity that the air conditioner (20) should exhibit and the outside air processing device (50) This is an operation for determining the second target air conditioning capacity to be performed. The fourth operation is based on the first target air conditioning capability and the second target air conditioning capability determined in the third operation, and the operating frequency command value of the air conditioning compressor (41) and the operating frequency of the humidity control compressor (71). The command value is determined. The fifth operation is an inverter that supplies power to each compressor (41, 71) based on the command value of the operating frequency of the air conditioning compressor (41) and humidity control compressor (71) determined in the fourth operation. Is an operation for commanding the output frequency.

    The ventilation operation control unit (93c) executes ventilation operation control when the determination unit (93a) determines that the outdoor air is in the ventilation region. In the ventilation operation control, the ventilation operation control unit (93c) performs the air conditioning load in the room, that is, the air according to the temperature difference between the indoor temperature detected by each indoor temperature sensor (56a, 56b) and the target indoor temperature Ts. While controlling the operation of the conditioning device (20), the operation of the humidity control compressor (71) is stopped, and the outdoor air processing device (50) supplies the indoor air without adjusting the temperature and humidity of the outdoor air. It is configured.

-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 treatment device (50) can be switched between a dehumidifying operation, a humidifying operation, and a ventilation operation. Yes. The dehumidifying operation and the humidifying operation constitute an outside air processing operation.

<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), and 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 that has flowed 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). 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 treatment device>
As described above, in the outside air processing device (50), the dehumidifying operation, the humidifying operation, and the ventilation operation can be switched. In both the dehumidifying operation and the humidifying operation, in the humidity adjusting refrigerant circuit (60) of the outside air processing device (50), the vapor compression refrigeration cycle is performed by circulating the refrigerant. On the other hand, in the ventilation operation, the refrigerant does not circulate in the humidity control refrigerant circuit (60).

    The dehumidifying operation of the outside air processing device (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 adjusted as appropriate. 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 adjusted as appropriate. 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 that has flowed into the humidity control circuit (80a, 80b) passes through the four-way switching valve (83a, 83b) and then flows into the second adsorption heat exchanger (82a, 82b) to condense. 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 processing device (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 adjusted as appropriate. 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 adjusted as appropriate. 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 outdoor 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.

    In the ventilation operation, the humidity control compressor (71) is not driven, and the refrigerant does not circulate in the humidity control refrigerant circuit (60). On the other hand, in the humidity control unit (52a, 52b), the air supply fan (53a, 53b) and the exhaust fan (54a, 54b) are driven. As a result, outdoor air passes through one of the first and second adsorption heat exchangers (81a, 81b) (82a, 82b) and is sucked into the air supply fan (53a, 53b), and then into the room Supplied. On the other hand, the indoor air passes through a different direction from the outdoor air of the first and second adsorption heat exchangers (81a, 81b) (82a, 82b) and is sucked into the exhaust fan (54a, 54b). And then discharged outside the room. By such an operation, the outdoor air is supplied to the room without adjusting the temperature and humidity, while the indoor air is discharged to the outside and the indoor space is ventilated.

<Operation of control system>
The operation of the control system (90) constituted by the air conditioning controller (91), the humidity controller (92a, 92b), and the linkage controller (93) will be described.

    The air conditioning controller (91) performs a control operation for the four-way switching valve (43) and the outdoor expansion valve (45) provided in the air conditioning refrigerant circuit (30), and a control operation for the outdoor fan (23) and the like. The humidity controller (92a, 92b) provided in each humidity control unit (52a, 52b) is equipped with a four-way selector valve (83a, 83b) provided in the humidity control circuit (80a, 80b) and a humidity control expansion. Control operation is performed on the valves (84a, 84b).

    As described above, the cooperative controller (93) first determines whether the outdoor air is within the predetermined ventilation region from the outdoor humidity detected by the outdoor humidity sensors (58a, 58b) by the determination unit (93a). It is determined whether or not it is in a state. When the determination unit (93a) determines that the outdoor air is in the ventilation region, the ventilation operation control unit (93c) operates the air conditioner (20) according to the indoor air conditioning load. Then, the operation of the humidity control compressor (71) is stopped, and ventilation operation control for supplying the indoor air without adjusting the temperature and humidity of the outdoor air is executed in the outdoor air processing device (50). On the other hand, when the determination unit (93a) determines that the outdoor air is not in the ventilation region, the minimum energy control unit (93b) executes minimum energy control.

    The minimum energy control unit (93b) performs the five operations shown in FIG. The minimum energy control unit (93b) performs a series of control operations in which the first to fifth operations shown in FIG. 4 are sequentially performed, and the series of control operations is performed every predetermined time (for example, every 12 minutes). ) Repeatedly. In the minimum energy control unit (93b), the time interval between the control operations including the first to fifth operations is longer than the switching time interval between the first operation and the second operation in each humidity control unit (52a, 52b). Is set to a value. Below, each of the 1st-5th operation | movement which this minimum energy control part (93b) performs is demonstrated in detail.

=== First action ===
The minimum energy control unit (93b) performs an operation of acquiring necessary data as the first operation. Specifically, the minimum energy control unit (93b) includes an indoor temperature sensor (55a), an indoor humidity sensor (56a), an outdoor temperature sensor (57a), and an outdoor humidity provided in the first humidity control unit (52a). Measurement values are acquired from each of the sensors (58a). Further, the minimum energy control unit (93b) acquires the target indoor temperature Ts (target value of indoor air temperature) and the target indoor humidity Hs (target value of relative humidity of indoor air) from a remote controller (not shown).

=== Second action ===
The minimum energy control unit (93b) executes the second operation when the first operation ends. The minimum energy control unit (93b) performs an operation of calculating an air conditioning capability (total required capability Q) required for the entire air conditioning system (10) as the second operation. The total required capacity Q is the sum of the air conditioning capacity Q1 required for indoor air conditioning and the air conditioning capacity Q2 required for outside air treatment (Q = Q1 + Q2). Therefore, the minimum energy control unit (93b) calculates the air conditioning capacity Q1 necessary for air conditioning in the room and the air conditioning capacity Q2 necessary for the outside air processing separately, and calculates the total required capacity Q by adding them together. To do.

    The second operation of the minimum energy control unit (93b) will be described with reference to FIG. 5, taking as an example the case where the air conditioner (20) performs a cooling operation and the outside air processing device (50) performs a dehumidifying operation. To do. In the figure, point A represents the state of outdoor air, point B represents the current state of indoor air, and point C represents the target state of indoor air. The state at point A is a state in which the dry bulb temperature is a measurement value of the outdoor temperature sensor (57a) and the relative humidity is a measurement value of the outdoor humidity sensor (58a). The state at point B is a state in which the dry bulb temperature is a measured value of the indoor temperature sensor (55a) and the relative humidity is a measured value of the indoor humidity sensor (56a). The state at point C is a state in which the dry bulb temperature is the target indoor temperature Ts and the relative humidity is the target indoor humidity Hs.

    First, the operation in which the minimum energy control unit (93b) calculates the air conditioning capability Q2 necessary for the outside air processing will be described. As shown in FIG. 5, the air conditioning capability Q2 required for the outside air processing is an air conditioning capability necessary for changing the outdoor air in the state of point A to the state of point C. Therefore, the minimum energy control unit (93b) calculates the difference h_2 in the specific enthalpy between the humid air in the state of point A and the humid air in the state of point C. The minimum energy control unit (93b) includes a flow rate of outdoor air supplied to the room by the first humidity control unit (52a), and a flow rate of outdoor air supplied to the room by the second humidity control unit (52b). Is multiplied by the specific enthalpy difference h_2 to calculate the air conditioning capacity Q2 required for the outside air treatment (Q2 = h_2 × Voa).

    Next, the operation in which the minimum energy control unit (93b) calculates the air conditioning capability Q1 necessary for indoor air conditioning will be described. As shown in FIG. 5, the air conditioning capability Q1 necessary for air conditioning in the room is the air conditioning capability necessary to change the room air in the state of point B to the state of point C.

    By the way, the air conditioning capability Q1 required for indoor air conditioning is a value affected by the number of people in the room and the number of OA devices that serve as heat sources. For this reason, even if the current indoor air state (point B state) and the target indoor air state (point C state) are known, the air conditioning capability Q1 cannot be calculated theoretically. Therefore, the minimum energy control unit (93b) determines the difference in dry bulb temperature between the state of point B and the state of point C (ie, the difference between the measured value Tr of the indoor temperature sensor (55a) and the target indoor temperature Ts (Tr−Ts)). ) And the rated capacity Qac0 of the air conditioner (20), the air conditioning capacity Q1 necessary for indoor air conditioning is estimated.

    Specifically, the minimum energy control unit (93b) has an air conditioning capability Q1 required for indoor air conditioning when the temperature difference (Tr−Ts) is equal to or larger than a predetermined reference value ΔTm (Tr−Ts ≧ ΔTm). If the temperature difference (Tr-Ts) is zero (Tr = Ts), it is estimated that the air conditioner (20) is equal to the rated capacity Qac0 (Q1 = Qac0). Is zero (Q1 = 0). Further, the minimum energy control unit (93b) determines the value of the temperature difference (Tr−Ts) when the temperature difference (Tr−Ts) is greater than zero and less than the reference value ΔTm (0 <Tr−Ts <ΔTm). It is estimated that the value obtained by multiplying the rated capacity Qac0 of the air conditioner (20) by the coefficient corresponding to is the value of the air conditioning capacity Q1 required for indoor air conditioning. That is, in the case of 0 <Tr−Ts <ΔTm, the minimum energy control unit (93b) sets the value of the air conditioning capability Q1 by using, for example, an equation “Q1 = {(Tr−Ts) / ΔTm} × Qac0”. presume.

=== Third action ===
The minimum energy control unit (93b) executes the third operation when the second operation ends. The minimum energy control unit (93b) determines, as a third operation, a first target air conditioning capability Qac_set that the air conditioner (20) should exhibit and a second target air conditioning capability Qdc_set that the outside air processing device (50) should exhibit. To perform the operation. In this third operation, the minimum energy control unit (93b) performs air conditioning under the condition that the sum of the first target air conditioning capability Qac_set and the second target air conditioning capability Qdc_set is the total required capability Q (Q = Qac_set + Qdc_set). The first target air conditioning so that the sum of the power consumption Wac of the device (20) and the power consumption Wdc of the outside air processing device (50) (ie, the power consumption Ws (= Wac + Wdc) of the entire air conditioning system (10)) is minimized. The values of the capability Qac_set and the second target air conditioning capability Qdc_set are determined.

    The minimum energy control unit (93b) stores first operation characteristic data and second operation characteristic data in advance in order to perform the third operation. The first operating characteristic data is data indicating the relationship between the air conditioning capacity and power consumption in the air conditioner (20), and is recorded in the minimum energy control unit (93b) as a matrix as shown in FIG. On the other hand, the second operation characteristic data is data indicating the relationship between the air conditioning capability and power consumption in the outside air processing device (50), and is recorded in the minimum energy control unit (93b) as a matrix as shown in FIG. .

    First, the first operating characteristic data will be described. As shown in FIG. 6, the first operating characteristic data is composed of a plurality of matrices created for different capacity ratios. Each matrix constituting the first operating characteristic data is an air conditioner in a plurality of operating conditions determined by the wet bulb temperature (T1, T2,...) Of the indoor air and the dry bulb temperature (Ta, Tb,...) Of the outdoor air. It is comprised by the air-conditioning capability which (20) exhibits, and the power consumption of the air conditioning apparatus (20) in the state which exhibits the air-conditioning capability. FIG. 6 shows only the matrix of “capacity ratio: 100%” and the matrix of “capacity ratio: 90%”, but the minimum energy control unit (93b) has other capacity ratios. The matrix is also recorded.

    Here, it is assumed that the rated operating condition is “an operating condition in which the wet bulb temperature of the indoor air is T3 and the dry bulb temperature Td of the outdoor air”. In this case, the value of “Qd3 (100)” constituting the matrix of “capacity ratio: 100%” in FIG. 6 is the rated capacity of the air conditioner (20). The value of “Wd3 (100)” is the power consumed by the air conditioner (20) when the air conditioner (20) exhibits the rated capacity under the rated operating conditions.

    It is assumed that the operating frequency of the air conditioning compressor (41) is “Fac_100” when the air conditioner (20) exhibits the air conditioning capability “Qd3 (100)” under the rated operating conditions. In this “capacity ratio: 100%” matrix, for example, the value of “Qb2 (100)” is air conditioning under “operating conditions in which the wet bulb temperature of the indoor air is T2 and the dry bulb temperature of the outdoor air is Tb”. This is the air conditioning capacity that the air conditioner (20) exhibits when the operating frequency of the compressor (41) is set to “Fac_100”. The value of “Wb2 (100)” is the air conditioner ( 20) is the power consumption of the air conditioner (20) when the air-conditioning capability “Qb2 (100)” is exhibited. That is, the matrix of “capacity ratio: 100%” constituting the first operating characteristic data is the air conditioner (20) in each operating condition when the operating frequency of the air conditioning compressor (41) is set to “Fac_100”. Shows the air conditioning capability exhibited by the air conditioner and the power consumption of the air conditioner (20) at that time.

    In the matrix of “capacity ratio: 90%” in FIG. 6, the value of “Qd3 (90)” indicating the air conditioning capability of the air conditioner (20) under the rated operating condition is the value of “Qd3 (100)” which is the rated capability. 90% of the value (Qd3 (90) = 0.9 × Qd3 (100)). The value of “Wd3 (90)” is the power consumption of the air conditioner (20) when the air conditioner (20) exhibits the air conditioning capability “Qd3 (90)” under the rated operating conditions.

    It is assumed that the operating frequency of the air conditioning compressor (41) when the air conditioner (20) exhibits the air conditioning capability “Qd3 (90)” under this rated operating condition is “Fac_90”. In this “capacity ratio: 90%” matrix, for example, the value of “Qe4 (90)” is air-conditioning under “operating conditions where the wet bulb temperature of the indoor air is T4 and the dry bulb temperature Te of the outdoor air”. This is the air conditioning capacity that the air conditioner (20) exhibits when the operating frequency of the compressor (41) is set to “Fac_90”. The value of “We4 (90)” is the air conditioner ( 20) is the power consumption of the air conditioner (20) when the air-conditioning capability “Qe4 (90)” is exerted. That is, the matrix of “capacity ratio: 90%” constituting the first operating characteristic data is the air conditioner (20) in each operating condition when the operating frequency of the air conditioning compressor (41) is set to “Fac_90”. Shows the air conditioning capability exhibited by the air conditioner and the power consumption of the air conditioner (20) at that time.

    Next, the second operating characteristic data will be described. As shown in FIG. 7, the second operating characteristic data is composed of a plurality of matrices created for different capacity ratios. Each matrix constituting the second operating characteristic data includes indoor air dry bulb temperature (T1, T2,...) And relative humidity (r1, r2,...) And outdoor air dry bulb temperature (Ta, Tb,...) Consists of the air conditioning capability that the outside air treatment device (50) exhibits under a plurality of operating conditions determined by the relative humidity (R1, R2, ...) and the power consumption of the outside air treatment device (50) in a state where the air conditioning capability is exhibited. Is done. FIG. 7 shows only the matrix of “capacity ratio: 100%” and the matrix of “capacity ratio: 90%”, but the humidity controller (92a) has other capacity ratios. The matrix is also recorded.

    Here, it is assumed that the rated operation condition is “an operation condition in which the wet bulb temperature of the indoor air is T2 and the relative humidity is r2, and the dry bulb temperature Tb of the outdoor air and the relative humidity is R2.” In this case, the value of “Qb2 — 22 (100)” constituting the matrix of “capacity ratio: 100%” in FIG. 7 is the rated capacity of the outside air processing device (50). The value of “Qsb2_22 (100)” is the sensible heat capacity (that is, the capacity used to change the temperature of the outdoor air) out of the rated capacity exhibited by the outdoor air processing device (50). The value of “(100)” is the power consumed by the outside air processing device (50) when the outside air processing device (50) exhibits the rated capacity under the rated operating conditions.

    It is assumed that the operating frequency of the humidity control compressor (71) is “Fdc_100” when the outside air processing device (50) exhibits the air conditioning capability “Qb2 — 22 (100)” under the rated operation conditions. In this “capacity ratio: 100%” matrix, for example, the value of “Qa1_13 (100)” is “the wet bulb temperature of the indoor air is T1 and the relative humidity is r3, the dry bulb temperature Ta of the outdoor air and the relative This is the air conditioning capability exhibited by the outside air processing device (50) when the operating frequency of the humidity control compressor (71) is set to "Fdc_100" under the "operating condition where the humidity is R1". The value of “Qsa1_13 (100)” is the sensible heat capacity of the air conditioning capacity “Qa1_13 (100)” exhibited by the outside air treatment device (50), and the value of “Wa1_13 (100)” It is the power consumption of the outside air processing device (50) when the outside air processing device (50) is exhibiting the air conditioning capability “Qa1_13 (100)” under the conditions. In other words, the “capacity ratio: 100%” matrix that constitutes the second operating characteristic data is a humidity control compressor in each operating condition when the operating frequency of the humidity control compressor (71) is set to “Fdc_100”. The air conditioning capacity exhibited by (71) and the power consumption of the outside air processing device (50) at that time are shown.

    In the matrix of “capacity ratio: 90%” in FIG. 7, the value of “Qb2_22 (90)” indicating the air conditioning capability of the outside air treatment device (50) under the rated operating condition is the value of “Qb2_22 (100)” which is the rated capability. 90% of the value (Qb2 — 22 (90) = 0.9 × Qb2 — 22 (100)). The value of “Qsb2_22 (90)” is the sensible heat capacity of the air conditioning capacity “Qb2_22 (90)” exhibited by the outside air treatment device (50), and the value of “Wb2_22 (90)” is the rated operation This is the power consumption of the outside air processing device (50) when the outside air processing device (50) is exhibiting the air conditioning capability “Qb2 — 22 (90)” under the conditions.

    It is assumed that the operating frequency of the humidity control compressor (71) is “Fdc_90” when the outside air processing device (50) exhibits the air conditioning capability “Qb2_22 (90)” under the rated operation conditions. In this “capacity ratio: 90%” matrix, for example, the value of “Qa2_32 (90)” is “the wet bulb temperature of the indoor air is T2 and the relative humidity is r2, and the dry bulb temperature Ta of the outdoor air and the relative This is the air conditioning capability exhibited by the outside air processing device (50) when the operating frequency of the humidity control compressor (71) is set to "Fdc_90" under the "operating condition where the humidity is R3". The value of “Qsa2_32 (90)” is the sensible heat capacity of the air conditioning capacity “Qa2_32 (90)” exhibited by the outside air processing device (50), and the value of “Wa2_32 (90)” This is the power consumption of the outside air processing device (50) when the outside air processing device (50) is exhibiting the air conditioning capability “Qa2_32 (90)” under the conditions. In other words, the “capacity ratio: 90%” matrix that constitutes the second operating characteristic data is a humidity control compressor in each operating condition when the operating frequency of the humidity control compressor (71) is set to “Fdc_90”. The air conditioning capacity exhibited by (71) and the power consumption of the outside air processing device (50) at that time are shown.

    The operation in which the minimum energy control unit (93b) determines the first target air conditioning capability Qac_set and the second target air conditioning capability Qdc_set will be described. Here, the rated capacity of the air conditioner (20) is 40 kW, the rated capacity of the outside air treatment apparatus (50) is 12 kW, and the air conditioning capacity (total required capacity Q) required for the entire air conditioning system (10) is 30 kW. An example will be described with reference to FIG. Note that the numerical values shown in FIG. 8 are merely examples.

    In this case, the minimum energy control unit (93b) is configured such that the sum (Qac + Qdc) of the air conditioning capability Qac of the air conditioner (20) and the air conditioning capability Qdc of the outside air processing device (50) is the total required capability Q (30 kW in the example of FIG. 8). ), A plurality of combinations of the air conditioning capability Qac of the air conditioner (20) and the air conditioning capability Qdc of the outside air processing device (50) are extracted. And the minimum energy control part (93b) is the power consumption of the air conditioner (20) for each combination of the air conditioning capability Qac of the extracted air conditioner (20) and the air conditioning capability Qdc of the outside air treatment device (50). The power consumption of the outside air processing device (50) is calculated using the first operating characteristic data and the second operating characteristic data.

    First, the operation in which the minimum energy control unit (93b) calculates the power consumption of the air conditioner (20) will be described. Suppose that the wet bulb temperature of indoor air is 20 ° C. and the dry bulb temperature of outdoor air is 32 ° C. The wet bulb temperature of the room air is calculated from the measured values of the room temperature sensor (55a) and the room humidity sensor (56a). The dry bulb temperature of the outdoor air is a measurement value of the outdoor temperature sensor (57a).

    For example, when calculating the power consumption Wac of the air conditioner (20) when the air conditioning capacity Qac of the air conditioner (20) is 22 kW, the minimum energy control unit (93b) indicates that the “wet bulb temperature of room air is 20”. The capacity ratio when the air conditioning capacity Qac of the air conditioner (20) is 22 kW under the "operating condition in which the dry-bulb temperature of the outdoor air is 32 ° C at ° C" is determined using the first operating characteristic data. Then, the minimum energy control unit (93b) refers to the matrix corresponding to the determined capacity ratio among the matrices constituting the first operating characteristic data, and “the wet bulb temperature of the indoor air is 20 ° C. and the dry bulb of the outdoor air. The power consumption Wac when the air conditioning capability Qac of the air conditioner (20) is 22 kW under the “operating condition where the temperature is 32 ° C.” is calculated.

    Next, the operation in which the minimum energy control unit (93b) calculates the power consumption of the outside air processing device (50) will be described. Assume that the dry bulb temperature of indoor air is 25 ° C. and the relative humidity is 60%, and the dry bulb temperature of outdoor air is 32 ° C. and the relative humidity is 80%. Note that the dry bulb temperature of the room air is a measured value of the room temperature sensor (55a), and the relative humidity of the room air is a measured value of the room humidity sensor (56a). The dry bulb temperature of the outdoor air is a measured value of the outdoor temperature sensor (57a), and the relative humidity of the outdoor air is a measured value of the outdoor humidity sensor (58a).

    For example, when calculating the power consumption Wdc of the outside air processing device (50) when the air conditioning capacity Qdc of the outside air processing device (50) is 8 kW, the minimum energy control unit (93b) indicates that “the dry bulb temperature of the room air is 25 The operating ratio when the air conditioning capacity Qdc of the outside air treatment device (50) is 8 kW under the "operating conditions in which the dry air temperature of the outdoor air is 32 ° C and the relative humidity is 80%" It determines using 2nd driving | running characteristic data. Then, the minimum energy control unit (93b) refers to the matrix corresponding to the determined capacity ratio among the matrices constituting the second operating characteristic data, and “the dry bulb temperature of the room air is 25 ° C. and the relative humidity is 60%. Thus, the power consumption Wdc when the air-conditioning capability Qdc of the outdoor air processing device (50) is 8 kW under the “operating condition where the dry bulb temperature of the outdoor air is 32 ° C. and the relative humidity is 80%” is calculated.

    The minimum energy control unit (93b) calculates the power consumption Wac of the air conditioner (20) and the outside air for each of the combinations of the air conditioning capacity Qac of the extracted air conditioner (20) and the air conditioning capacity Qdc of the outside air processing device (50). The sum of the power consumption Wdc of the processing device (50) (that is, the power consumption Ws (= Wac + Wdc) of the entire air conditioning system (10)) is calculated. Then, the minimum energy control unit (93b) compares the power consumption Ws in each combination, and compares the air conditioning capability Qac of the air conditioner (20) and the air conditioning capability Qdc of the outside air processing device (50) that minimize the power consumption Ws. A combination is selected, and the value of the air conditioning capability Qac in the combination is set as the first target air conditioning capability Qac_set, and the value of the air conditioning capability Qdc in the combination is set as the second target air conditioning capability Qdc_set. That is, in the example shown in FIG. 8, the minimum value of the power consumption Ws is 7.7 kW, the air conditioning capacity (Qac) of the air conditioner (20) at that time is 22 kW, and the air conditioning capacity of the outside air processing apparatus (50) at that time Qdc is 8 kW. Therefore, in this example, the minimum energy control unit (93b) sets the value of the first target air conditioning capability Qac_set to 22 kW and the value of the second target air conditioning capability Qdc_set to 8 kW.

=== Fourth operation ===
The minimum energy control unit (93b) executes the fourth operation when the third operation ends. As the fourth operation, the minimum energy control unit (93b) performs an operation of determining a command value for the operating frequency of the air conditioning compressor (41) and a command value for the operating frequency of the humidity control compressor (71).

    First, the operation in which the minimum energy control unit (93b) determines the command value for the operating frequency of the air conditioning compressor (41) will be described. Here, if the dry-bulb temperature and relative humidity of the indoor air and the dry-bulb temperature of the outdoor air are known, the air-conditioning apparatus (20) when the air-conditioning apparatus (20) exhibits the first target air conditioning capability Qac_set under the operating conditions ( 20) Capacity ratio (target capacity ratio) is determined. On the other hand, as described above, each matrix constituting the first operating characteristic data is air conditioned in each operating condition when the operating frequency of the air conditioning compressor (41) is set to a predetermined value (Fac_100, Fac_90,...). It shows the air conditioning capability exhibited by the device (20) and the power consumption of the air conditioner (20) at that time. Therefore, when the target capacity ratio of the air conditioner (20) is determined, the operating frequency of the air conditioning compressor (41) corresponding to the target capacity ratio is determined. Therefore, the minimum energy control unit (93b) sets the operating frequency of the air conditioning compressor (41) corresponding to the target capacity ratio to the command value of the operating frequency of the air conditioning compressor (41).

    Next, the operation in which the minimum energy control unit (93b) determines the command value for the operating frequency of the humidity control compressor (71) will be described. Here, if the dry bulb temperature and relative humidity of the indoor air and the dry bulb temperature and relative humidity of the outdoor air are known, the outside air when the outside air processing device (50) exhibits the second target air conditioning capability Qdc_set under the operating conditions. The capacity ratio (target capacity ratio) of the processing device (50) is determined. On the other hand, as described above, each matrix that constitutes the second operating characteristic data is the outside air in each operating condition when the operating frequency of the humidity control compressor (71) is set to a predetermined value (Fdc_100, Fdc_90,...). It shows the air conditioning capability exhibited by the processing device (50) and the power consumption of the outside air processing device (50) at that time. Therefore, when the target capacity ratio of the outside air processing device (50) is determined, the operating frequency of the humidity control compressor (71) corresponding to the target capacity ratio is determined. Therefore, the minimum energy control unit (93b) sets the operation frequency of the humidity control compressor (71) corresponding to the target capacity ratio to a command value of the operation frequency of the humidity control compressor (71).

=== Fifth action ===
The minimum energy control unit (93b) executes the fifth operation when the fourth operation ends. As the fifth operation, the minimum energy control unit (93b) performs an operation of instructing an output frequency to an inverter that supplies electric power to each compressor (41, 71).

    Specifically, in the fifth operation, the minimum energy control unit (93b) operates the air conditioning compressor (41) determined in the fourth operation with respect to the inverter that supplies power to the air conditioning compressor (41). The frequency command value is transmitted as a command value for the output frequency of the inverter. As a result, the frequency of the electric power supplied to the air conditioning compressor (41) becomes the command value of the operating frequency of the air conditioning compressor (41) determined in the fourth operation, which is exhibited by the air conditioner (20). The air conditioning capacity becomes the first target air conditioning capacity.

    In the fifth operation, the minimum energy control unit (93b) operates the humidity control compressor (71) determined in the fourth operation with respect to the inverter that supplies power to the humidity control compressor (71). The frequency command value is transmitted as a command value for the output frequency of the inverter. As a result, the frequency of the electric power supplied to the humidity control compressor (71) becomes the operation frequency command value of the humidity control compressor (71) determined in the fourth operation, and the outside air processing device (50) The air conditioning capability to be exhibited is the second target air conditioning capability.

-Effect of Embodiment 1-
According to the first embodiment, the determination unit (93a) of the control system (90) determines whether the temperature and humidity of the outdoor air are in a predetermined ventilation region, and the outdoor air is in the ventilation region. When it is determined that the state is in the above state, the ventilation operation is controlled by the ventilation operation control unit (93c). That is, when it is not necessary to adjust the temperature of the outdoor air or the temperature and humidity, the ventilation operation is performed without adjusting the temperature and humidity. Therefore, since the outdoor air is not wastefully cooled and dehumidified and reheated, the energy consumed in the air conditioning system (10) can be minimized.

    In Embodiment 1, when the determination unit (93a) of the control system (90) determines that the outdoor air is not in the ventilation region, the minimum energy control unit (93b) The capacity Qac_set and the second target air conditioning capacity Qdc_set, and the sum (Qac_set + Qdc_set) of the first target air conditioning capacity Qac_set and the second target air conditioning capacity Qdc_set are the total required capacity Q (that is, the air conditioning capacity required for the entire air conditioning system (10)) ), The sum (Wac + Wdc) of the power consumption Wac of the air conditioner (20) and the power consumption Wdc of the outside air treatment device (50) is determined to be minimum. In the first embodiment, the control system (90) is for air conditioning so that the air conditioner (20) exhibits the first target air conditioning capability and the outside air processing device (50) exhibits the second target air conditioning capability. Adjust the operating frequency of the compressor (41) and humidity control compressor (71). Therefore, according to the first embodiment, it is possible to suppress the power consumption Ws of the air conditioning system (10) to the minimum necessary while causing the air conditioning system (10) to exhibit the total required capacity Q.

    Further, according to the first embodiment, when the ventilation operation is executed in the outside air processing device (50), the ventilation operation control unit (93c) is configured to control the operation of the air conditioner (20) according to the indoor air conditioning load. ) Was configured. Therefore, the energy consumption of the air conditioning system (10) can be minimized.

-Modification 1 of Embodiment 1-
In the first embodiment, “the total heat capacity required for the entire air conditioning system (10) is the sum (Qac + Qdc) of the total heat capacity Qac of the air conditioner (20) and the total heat capacity Qdc of the outside air treatment apparatus (50). Air conditioning so that the sum (Wac + Wdc) of the power consumption Wac of the air conditioner (20) and the power consumption Wdc of the outside air treatment device (50) is minimized under the condition of "(total required capacity Q)" The target value of the total heat capacity Qac of the device (20) is set to the first target air conditioning capacity Qac_set, and the target value of the total heat capacity Qdc of the outside air processing device (50) is set to the second target air conditioning capacity Qdc_set. The total heat capacity is the sum of the sensible heat capacity that is required to adjust the temperature of the air to be processed and the latent heat capacity that is required to adjust the absolute humidity of the air to be processed. is there.

    As described above, in the first embodiment, the first target air conditioning capacity and the second target air conditioning capacity are set based on the total heat capacity. On the other hand, in the first embodiment, it is possible to set the first target air conditioning capacity and the second target air conditioning capacity based on the sensible heat capacity, and the first target air conditioning capacity and the second target air conditioning based on the latent heat capacity. It is also possible to set the ability.

    First, the case where the humidity controller (92a) sets the first target air conditioning capability Qac_set and the second target air conditioning capability Qdc_set based on the sensible heat capability will be described with reference to FIGS.

In FIG. 5, the dry bulb temperature of the air in the state of point A (ie, actual outdoor air) is Ta, the absolute humidity is Xa, and the dry bulb of the air in the state of point B (ie, actual indoor air). The temperature is Tb, the absolute humidity is Xb, and the absolute humidity of the air in the state of point C (wet air having a dry bulb temperature of the target indoor temperature Ts and a relative humidity of the target indoor humidity Hs) is Xc. The air in the state of point D is humid air whose dry bulb temperature is Ta and the absolute humidity is Xc, and the air in the state of point E is wet where the dry bulb temperature is Tb and the absolute humidity is Xc. Air
In FIG. 5, the sensible heat capacity Q2s necessary for the outside air treatment is supplied to the room by the first and second humidity control units (52a, 52b) to the specific enthalpy difference h_s2 between the point D state and the point C state. It is calculated by multiplying the outdoor air flow rate Voa (Q2s = h_s2 × Voa). Here, the ratio Rs of the sensible heat capacity out of the total heat capacity necessary for air conditioning in the room is the ratio enthalpy difference h_s1 between the state of the point E and the state of the point C, and the ratio of the state of the point B to the state of the point C. It is obtained by dividing by the enthalpy difference h_1 (Rs = h_s1 / h_1). On the other hand, the total heat capacity Q1 required for indoor air conditioning can be estimated by the same procedure as described in the description of the second operation of the control system (90). The sensible heat capacity Q1s necessary for indoor air conditioning is obtained by multiplying the total heat capacity Q1 necessary for indoor air conditioning by a ratio Rs (Q1s = Q1 × Rs). Further, the sensible heat capacity Qs required for the entire air conditioning system (10) is calculated by adding the sensible heat capacity Q1s required for indoor air conditioning and the sensible heat capacity Q2s required for outdoor air treatment (Qs = Q1s + Q2s).

    In the first operating characteristic data shown in FIG. 6, the total heat capacity of the air conditioner (20) is recorded, but it is possible to divide this total heat capacity into sensible heat capacity Qs_ac and latent heat capacity Qr_ac in advance. is there. During the cooling operation of the air conditioner (20), moisture in the air is condensed in the indoor heat exchangers (36a, 36b, ...) that have become evaporators, so the cooling capacity of the air conditioner (20) (Total heat capacity) is divided into sensible heat capacity and latent heat capacity. Further, during the heating operation of the air conditioner (20), only the temperature of the air rises in the indoor heat exchanger (36a, 36b,...) That is a condenser. (Total heat capacity) is all sensible heat capacity. On the other hand, in the second operating characteristic data shown in FIG. 7, the sensible heat capacity Qs_dc of the outside air processing device (50) is already recorded.

    In this case, the humidity controller (92a) determines the target value of the sensible heat capacity Qs_ac of the air conditioner (20) and the target value of the sensible heat quantity force Qs_dc of the outside air treatment device (50) as the air conditioner (20 ) Sensible heat capacity Qs_ac and the sensible heat capacity Qs_dc of the outside air treatment device (50) become the sensible heat capacity Qs required for the entire air conditioning system (10) (Qs = Qs_ac + Qs_dc). The sum of the power consumption of (20) and the power consumption of the outside air processing device (50) is determined to be minimum. Then, the humidity controller (92a) sets the target value of the sensible heat capacity Qs_ac of the air conditioner (20) thus determined to the first target air conditioning capacity Qac_set, and the sensible heat capacity of the outside air processing apparatus (50). The target value of Qs_dc is set to the second target air conditioning capability Qdc_set, respectively.

    Next, the case where the humidity controller (92a) sets the first target air conditioning capability Qac_set and the second target air conditioning capability Qdc_set based on the latent heat capability will be described with reference to FIGS.

    In FIG. 5, the latent heat capacity Q2s necessary for the outside air treatment is calculated based on the specific enthalpy difference h_r2 between the state of point A and the state of point D, which is supplied to the outdoor by the first and second humidity control units (52a, 52b). It is calculated by multiplying the air flow rate Voa (Q2r = h_r2 × Voa). Here, the ratio Rr of the latent heat capacity out of the total heat capacity necessary for air conditioning in the room is the specific enthalpy difference h_r1 between the state of point B and the state of point E, and the specific enthalpy of the state of point B and the state of point C It is obtained by dividing by the difference h_1 (Rr = h_r1 / h_1). On the other hand, the total heat capacity Q1 required for indoor air conditioning can be estimated by the same procedure as described in the description of the second operation of the control system (90). The latent heat capacity Q1r necessary for indoor air conditioning is obtained by multiplying the total heat capacity Q1 necessary for indoor air conditioning by a ratio Rr (Q1r = Q1 × Rr). The latent heat capacity Qr required for the entire air conditioning system (10) is calculated by adding together the latent heat capacity Q1r necessary for indoor air conditioning and the latent heat capacity Q2r necessary for outside air processing (Qr = Q1r + Q2r).

    As described above, in the first operating characteristic data shown in FIG. 6, the total heat capacity of the air conditioner (20) is recorded. This total heat capacity is divided into a sensible heat capacity Qs_ac and a latent heat capacity Qr_ac in advance. It is possible to leave. On the other hand, in the second operating characteristic data shown in FIG. 7, since the sensible heat capacity Qs_dc of the outside air processing device (50) has already been recorded, the latent heat capacity Qr_dc of the outside air processing device (50) is determined as the outside air processing device (50). This is calculated by subtracting the sensible heat capacity Qs_dc of the outside air processing device (50) from the total heat capacity Qdc of (Qr_dc = Qdc−Qs_dc).

    In this case, the humidity controller (92a) uses the target value of the latent heat capability Qr_ac of the air conditioner (20) and the target value of the latent heat quantity force Qr_dc of the outside air treatment device (50) as the latent heat of the air conditioner (20). The power consumption of the air conditioner (20) under the condition that the sum of the capacity Qr_ac and the latent heat capacity Qr_dc of the outside air treatment device (50) becomes the latent heat capacity Qr required for the entire air conditioning system (10) (Qr = Qr_ac + Qr_dc) And the outside air processing device (50) are determined so that the sum of the power consumption is minimized. Then, the humidity controller (92a) sets the target value of the latent heat capability Qr_ac of the air conditioner (20) thus determined to the first target air conditioning capability Qac_set and the latent heat amount force Qr_dc of the outside air processing device (50). A target value is set for each second target air conditioning capability Qdc_set.

-Modification 2 of Embodiment 1
As shown in FIG. 9, in Embodiment 1 described above, one humidity control compressor (71a, 71b) may be mounted in each humidity control unit (52a, 52b). In the air conditioning system (10) shown in FIG. 9, 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).

<< Embodiment 2 of the Invention >>
The air conditioning system (10) of Embodiment 2 includes an air conditioner (20), an outside air processing device (50), and a cooperation controller (93). Further, in this air conditioning system (10), an air conditioning side controller (91) provided in the air conditioner (20), an outside air processing side controller (92) provided in the outside air processing device (50), and a cooperative control controller (93) constitutes a control system (90) which is a control means.

<Configuration of air conditioner>
In Embodiment 2, the air conditioner (20) constituting the air conditioning system (10) includes one outdoor unit (21) and two indoor units (22a, 22b). In the air conditioner (20), the outdoor unit (21) and the indoor units (22a, 22b) are connected by piping to form an air conditioning refrigerant circuit (30) that is a first refrigerant circuit. The numbers of outdoor units (21) and indoor units (22a to 22d) are merely examples. The configurations of the outdoor unit (21) and each indoor unit (22a, 22b) are the same as those in the first embodiment.

<Configuration of outside air treatment device>
The outside air processing device (50) constituting the air conditioning system (10) is a so-called all-fresh type directly expanded outside air processing device (Dedicated Outdoor Air System). The outdoor air processing device (50) is installed in an outdoor space such as a rooftop of a building, for example, and is formed with an outdoor air suction port and an air outlet, although not shown. The outdoor air suction port opens outside the room, and the inflow end of the air supply passage (100a) is connected to the outlet. The air supply passage (100a) has an outflow end branched into two and connected to the two indoor spaces (S1, S2). The air supply passage (100a) guides the air whose temperature or temperature and humidity are adjusted in the outside air processing device (50) to the two indoor spaces (S1, S2). Flow rate adjusting mechanisms (100c, 100c) for adjusting the flow rate of the supply air are respectively provided at the two outflow end portions of the supply air passage (100a). On the other hand, an exhaust passage (100b) is connected to the indoor space (S1, S2). In the exhaust passage (100b), the inflow side branches into two, the two inflow ends are connected to the two indoor spaces (S1, S2), respectively, while the outflow end opens to the outside. The exhaust passage (100b) exhausts the air in the two indoor spaces (S1, S2) to the outside. Note that the numbers of indoor spaces and outside air processing devices are merely examples.

    The outside air processing device (50) accommodates an outside air processing refrigerant circuit (101), a heater (102), and an air supply fan (103).

    The outside air processing refrigerant circuit (101) includes an outside air processing compressor (104), a four-way switching valve (105), a heat source side heat exchanger (106), an expansion valve (107), and a use side heat exchange. A vessel (108) and an accumulator (109) are provided.

    In the outside air processing refrigerant circuit (101), the discharge side of the outside air processing compressor (104) is connected to the first port of the four-way switching valve (105), and the suction side is switched four-way through the accumulator (109). Connected to the second port of the valve (105). The third port of the four-way switching valve (105) is connected to the gas side end of the heat source side heat exchanger (106). The liquid side end of the heat source side heat exchanger (106) is connected to one end of the expansion valve (107). The other end of the expansion valve (107) is connected to the liquid side end of the use side heat exchanger (108). The gas side end of the use side heat exchanger (108) is connected to the fourth port of the four-way switching valve (105). A heat source side fan (106a) is provided in the vicinity of the heat source side heat exchanger (106).

    The outside air processing refrigerant circuit (101) is provided with a high pressure sensor (110) and a low pressure sensor (111). The high pressure sensor (110) is connected to a pipe connecting the discharge side of the outside air processing compressor (104) and the four-way switching valve (105), and measures the pressure of the high pressure refrigerant discharged from the outside air processing compressor (104). To do. The low pressure sensor (111) is connected to a pipe connecting the accumulator (109) and the four-way switching valve (105), and measures the pressure of the low pressure refrigerant sucked into the outside air processing compressor (104).

    The outside air processing compressor (104) is a so-called hermetic compressor. Electric power is supplied to the motor of the outside air processing compressor (104) via an inverter (not shown). When the frequency of AC supplied from the inverter to the electric motor (that is, the operating frequency of the outside air processing compressor (104)) is changed, the rotation speed of the electric motor changes, and as a result, the outside air processing compressor (104) The operating capacity changes.

    The heat source side heat exchanger (106) is a fin-and-tube heat exchanger that exchanges heat between outdoor air supplied by the heat source side fan (106a) and refrigerant. The four-way switching valve (105) includes a first state (state indicated by a solid line in FIG. 10) in which the first port communicates with the third port and the second port communicates with the fourth port, The state is switched to a second state (state indicated by a broken line in FIG. 10) in which the port communicates with the fourth port and the second port communicates with the third port.

    The use side heat exchanger (108) is a fin-and-tube heat exchanger that exchanges heat between the outdoor air supplied by the air supply fan (103) and the refrigerant.

    In the present embodiment, the heater (102) is an electric heater, and heats the outdoor air supplied by the air supply fan (103). The heater (102) is not limited to an electric heater, and may be a gas heater, for example.

    As described above, although not shown, the outdoor air processing device (50) is formed with an outdoor air suction port and an air outlet. In the outside air processing device (50), the air supply fan (103) is provided between the suction port and the outlet, and an air passage is formed between the suction port and the outlet. The utilization side heat exchanger (108), the heater (102), and the air supply fan (103) are arranged in this order from the upstream side to the downstream side of the air passage. With such a configuration, the outdoor air processing device (50) takes outdoor air from the outdoor space, passes the use side heat exchanger (108) and the heater (102) in order, and then passes through the air supply passage (100a). To the two indoor spaces (S1, S2).

    The outdoor air processing device (50) is provided with an outdoor temperature sensor (112) and an outdoor humidity sensor (113) on the upstream side of the use side heat exchanger (108) in the air passage. The outdoor temperature sensor (112) measures the temperature of the outdoor air sucked into the outdoor air processing device (50). The outdoor humidity sensor (113) measures the relative humidity of the outdoor air sucked into the outdoor air processing device (50). Each indoor space (S1, S2) is provided with an indoor temperature sensor (114a, 114b) and an indoor humidity sensor (115a, 115b). The indoor temperature sensors (114a, 114b) measure the temperature of the air in each indoor space (S1, S2). The indoor humidity sensor (115a, 115b) measures the relative humidity of the air in each indoor space (S1, S2).

<Control system configuration>
As described above, the control system (90) of the air conditioning system (10) includes the air conditioning side controller (91), the outside air processing side controller (92), and the cooperative control controller (93).

    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). The air conditioning controller (91) is configured to control the operation of the air conditioner (20). During the operation of the air conditioner (20), the air conditioning controller (91) controls the output frequency of the inverter connected to the air conditioning compressor (41), whereby the air conditioner (20) exerts air conditioning. Adjust ability.

    The outside air processing side controller (92) is accommodated in the outside air processing device (50). Measurement values of an outdoor temperature sensor (116) and an outdoor humidity sensor (117) provided in the outdoor air processing device (50) are input to the outdoor air processing side controller (92). The outside air processing side controller (92) is configured to control the operation of the outside air processing compressor (104). During the operation of the outside air processing device (50), the outside air processing side controller (92) controls the output frequency of the inverter connected to the outside air processing compressor (104) so that the outside air processing device (50) exhibits. Adjust the air conditioning capacity.

    The cooperation controller (93) includes a determination unit (93a), a minimum energy control unit (93b), and a ventilation operation control unit (93c). Measurement values (that is, the outside temperature and the outside humidity) of the outdoor temperature sensor (116) and the outdoor humidity sensor (117) provided in the outside air processing device (50) are input to the cooperation controller (93). Further, the cooperation controller (93) has a target value of the indoor air temperature (ie, the target indoor temperature Ts) and a target value of the relative humidity of the indoor air (ie, the target indoor humidity Hs) set by the user. Input via remote control not shown.

    The determination unit (93a) determines whether or not the outdoor air is in a predetermined ventilation region. In the present embodiment, the predetermined ventilation region is set based on a predetermined neutral air zone that is close to the temperature and humidity of the room air.

    Here, as shown in FIG. 11, the neutral air zone refers to an air region (region (1) in FIG. 11) in a state close to the temperature and humidity of air in the indoor space in the humid air diagram. Specifically, when the dry bulb temperature is T and the absolute humidity is X, the air region satisfies T1 ≦ T ≦ T2 and X1 ≦ X ≦ X2. T1 is 70 degrees Fahrenheit (21 degrees Celsius), T2 is 80 degrees Fahrenheit (26 degrees Celsius), X1 is 0.036 kg / kg (DA), and X2 is 0.040 kg / kg (DA).

    In the second embodiment, the determination unit (93a) first determines whether the outdoor air is in any of the zones (1) to (7) shown in FIG.

    Here, the zone (1) is the neutral air zone and is an air region that satisfies T1 ≦ T ≦ T2 and X1 ≦ X ≦ X2. Zone (2) is an air region that satisfies T> T2 and X> X2. Zone (3) is an air region that satisfies T> T2 and X ≦ X2. The zone (4) is an air region that satisfies T1 ≦ T ≦ T2 and X <X1. The zone (5) is an air region that satisfies T1 ≦ T ≦ T2 and X> X2. The zone (6) is an air region that satisfies T <T1 and X ≧ X1. The zone (7) is an air region that satisfies T <T1 and X <X1.

    Further, in the second embodiment, an air region combining the zone (1) and the zone (4) is set as a ventilation region. Therefore, the determination unit (93a) determines that the outdoor air is in a predetermined ventilation region when the outdoor air state is determined to be the zone (1) or (4) in the above determination. . On the other hand, when the determination unit (93a) determines in the above determination that the outdoor air is in the zone (2), (3), (5), (6) or (7), the outdoor air is It is determined that the condition is not within a predetermined ventilation area.

    Also in the second embodiment, the minimum energy control unit (93b) executes the minimum energy control when the determination unit (93a) determines that the outdoor air is not in the ventilation region. The minimum energy control unit (93b) is configured to sequentially perform five operations (first to fifth operations) in the minimum energy control, as shown in FIG. The minimum energy control unit (93b) is configured to repeatedly perform the minimum energy control including the five operations shown in FIG. 12 every time a predetermined time elapses.

    An outline of the first to fifth operations performed by the minimum energy control unit (93b) will be described. The first operation is an operation for acquiring necessary data such as output values of the sensors (112, 113, 114a, 114b, 115a, 115b). The second operation is an operation for calculating the air conditioning capacity required for the entire air conditioning system (10) based on the data acquired in the first operation. The third action is based on the air conditioning capacity required for the entire air conditioning system (10) calculated in the second action, and the first target air conditioning capacity that the air conditioner (20) should exhibit and the outside air processing device (50) This is an operation for determining the second target air conditioning capacity to be performed. The fourth operation is based on the first target air conditioning capability and the second target air conditioning capability determined in the third operation, and the operating frequency command value of the air conditioning compressor (41) and the operating frequency of the outside air processing compressor (104). The command value is determined. The fifth operation is based on the operating frequency command values of the air conditioning compressor (41) and the outside air processing compressor (104) determined in the fourth operation, with respect to the inverter that supplies power to each compressor (41,104). This is an operation to command the output frequency.

    Also in the second embodiment, the ventilation operation control unit (93c) executes the ventilation operation control when the determination unit (93a) determines that the outdoor air is in the ventilation region. In the ventilation operation control, the ventilation operation control unit (93c) performs the air conditioning load in the room, that is, the air according to the temperature difference between the indoor temperature detected by each indoor temperature sensor (56a, 56b) and the target indoor temperature Ts. While controlling the operation of the conditioner (20), the operation of the compressor (104) for treating the outside air is stopped, and the outside air treatment device (50) is supplied to the room without adjusting the temperature and humidity of the outdoor air. It is configured.

-Driving action-
The operation of the air conditioning system (10) will be described. In the air conditioning system (10) of the second embodiment, the air conditioner (20) can be switched between cooling operation and heating operation, and the outside air treatment device (50) can be switched between cooling operation, heating operation and ventilation operation. Yes. The cooling operation and the heating operation constitute the outside air processing operation. About the operation | movement operation | movement of an air conditioning apparatus, since it is the same as that of Embodiment 1, description is abbreviate | omitted.

<Operation of outside air treatment device>
As described above, in the outside air processing device (50), the cooling operation, the heating operation, and the ventilation operation can be switched. In both the cooling operation and the heating operation, in the outside air processing refrigerant circuit (101) of the outside air processing device (50), a vapor compression refrigeration cycle is performed by circulating the refrigerant. On the other hand, in the ventilation operation, the refrigerant does not circulate in the outside air processing refrigerant circuit (101).

    The cooling operation of the outside air processing device (50) will be described. In the second embodiment, the outdoor air processing device (50) performs the cooling operation when the outdoor air is in the state of the zone (2), the zone (3), the zone (5), and the zone (6).

    In the outside air processing refrigerant circuit (101) during the cooling operation, the four-way switching valve (105) is set to the first state (the state indicated by the solid line in FIG. 10), and the opening degree of the expansion valve (107) is appropriately adjusted. . In the outside air processing refrigerant circuit (101) during the cooling operation, the heat source side heat exchanger (106) operates as a condenser, and the use side heat exchanger (108) operates as an evaporator.

    The refrigerant flow in the outside air processing refrigerant circuit (101) during the cooling operation will be specifically described. The high-pressure refrigerant discharged from the outside air processing compressor (104) flows into the heat source side heat exchanger (106) after passing through the four-way switching valve (105), dissipates heat to the outdoor air, and condenses. The refrigerant that has flowed out of the heat source side heat exchanger (106) is reduced in pressure when passing through the expansion valve (107) to become a low pressure refrigerant, and then flows into the use side heat exchanger (108) to supply air. It absorbs heat from the air and evaporates. The refrigerant that has flowed out of the use side heat exchanger (108) passes through the four-way switching valve (105), and is then sucked into the outside air processing compressor (104) and compressed.

    As described above, during the cooling operation, the use side heat exchanger (108) operates as an evaporator. The outdoor air processing device (50) cools the sucked outdoor air in the use side heat exchanger (108), then heats it with the heater (102) as necessary and supplies it to the room.

    The heating operation of the outside air processing device (50) will be described. In the second embodiment, the outdoor air processing device (50) performs the heating operation when the outdoor air is in the zone (7).

    In the outside air processing refrigerant circuit (101) during the heating operation, the four-way switching valve (105) is set to the second state (the state indicated by the broken line in FIG. 10), and the opening degree of the expansion valve (107) is appropriately adjusted. . In the outside air processing refrigerant circuit (101) during the heating operation, the use side heat exchanger (108) operates as a condenser, and the heat source side heat exchanger (106) operates as an evaporator.

    The flow of the refrigerant in the outside air processing refrigerant circuit (101) during the heating operation will be specifically described. The refrigerant discharged from the outside air processing compressor (104) flows into the utilization side heat exchanger (108) after passing through the four-way switching valve (105), dissipates heat to the outdoor air serving as supply air, and condenses. The refrigerant flowing out from the use side heat exchanger (108) is reduced in pressure when passing through the expansion valve (107) to become a low pressure refrigerant. The refrigerant that has passed through the expansion valve (107) flows into the heat source side heat exchanger (106), absorbs heat from the outdoor air, and evaporates. The refrigerant that has flowed out of the heat source side heat exchanger (106) passes through the four-way switching valve (105) and then is sucked into the outside air processing compressor (104) and compressed.

    As described above, during the heating operation, the use side heat exchanger (108) operates as a condenser. The outdoor air processing device (50) supplies the sucked outdoor air to the room after heating it in the use side heat exchanger (108).

    The ventilation operation of the outside air processing device (50) will be described. In the second embodiment, the outdoor air processing device (50) performs the ventilation operation when the outdoor air is in the state of the zone (1) and the zone (4).

    In the ventilation operation, the outside air processing compressor (104) is not driven, and the refrigerant does not circulate in the outside air processing refrigerant circuit (101). The operation of the heater (102) is also stopped. On the other hand, in the outside air processing device (50), the air supply fan (103) is driven. As a result, the outdoor air simply passes through the use side heat exchanger (108) and the heater (102), is sucked into the air supply fan (103), and then supplied to the room. By such an operation, the outdoor air is supplied to the room without adjusting the temperature and humidity, while the indoor air is discharged to the outside and the indoor space is ventilated.

<Operation of control system>
The operation of the control system (90) constituted by the air conditioning side controller (91), the outside air processing side controller (92), and the cooperation controller (93) will be described.

    The air conditioning controller (91) performs a control operation for the four-way switching valve (43) and the outdoor expansion valve (45) provided in the air conditioning refrigerant circuit (30), and a control operation for the outdoor fan (23) and the like. The outside air processing side controller (92) performs a control operation on the four-way switching valve (105) and the expansion valve (107) provided in the outside air processing refrigerant circuit (101).

    The cooperation controller (93) performs a control operation as shown in FIG. Specifically, the cooperation controller (93) first acquires data on the outside air temperature detected by the outdoor temperature sensor (112) and the outside air humidity detected by the outdoor humidity sensor (113) (step S1). Next, the cooperative controller (93) determines whether the outdoor air is in any of the zones (1) to (7) based on the data of the outside air temperature and the outside air humidity acquired in step S1 by the determination unit (93a). It is determined whether it is in a state (step S2). Then, the linkage controller (93) determines whether the outdoor air is in the state of zone (1) or zone (4) set in advance as a ventilation region by the determination unit (93a). (Step S3).

    In step S3, when the determination unit (93a) determines that the outdoor air is in the zone (1) or zone (4), that is, in the ventilation region, the process proceeds to step S4, where the ventilation operation control unit (93c) operates the air conditioner (20) in accordance with the air conditioning load in the room, while stopping the operation of the outdoor air processing compressor (104), and the outdoor air temperature and humidity in the outdoor air processing device (50). Ventilation operation control to be supplied to the room without adjusting the is executed. On the other hand, in step S3, the determination unit (93a) determines that the outdoor air state is not in the state of zone (2), (3), (5), (6) or (7), that is, in the ventilation region. If it judges, it will progress to step S5 and a minimum energy control part (93b) will perform minimum energy control.

    Also in the second embodiment, the minimum energy control unit (93b) performs the five operations shown in FIG. 12 in the minimum energy control. The minimum energy control unit (93b) performs a series of control operations that sequentially perform the first to fifth operations shown in FIG. 12, and the series of control operations is performed every predetermined time (for example, every 12 minutes). ) Repeatedly. In the minimum energy control unit (93b), the time interval of the control operations including the first to fifth operations can be arbitrarily set. Hereinafter, each of the first to fifth operations performed by the minimum energy control unit (93b) will be described in detail only for parts different from the first embodiment.

=== First action ===
In the first operation, the minimum energy control unit (93b) includes, as necessary data, an indoor temperature sensor (114a, 114b), an indoor humidity sensor (115a, 115b), an outdoor temperature sensor (112), and an outdoor humidity sensor (113). ) Get the measured value from each of the above. Further, the minimum energy control unit (93b) obtains the target room temperature Ts (target value of the temperature of the room air) from a remote controller (not shown).

=== Second action ===
When the first operation ends, the minimum energy control unit (93b), as the second operation, performs the air conditioning capability Q1 necessary for indoor air conditioning and the air conditioning capability Q2 necessary for the outside air processing, as in the first embodiment. An operation for calculating the air conditioning capacity (total required capacity Q) required for the entire air conditioning system (10) is performed by individually calculating and adding them.

    The second operation of the minimum energy control unit (93b) will be described with reference to FIG. 14, taking as an example the case where the air conditioner (20) performs a cooling operation and the outside air processing device (50) performs a cooling operation. To do. In the figure, point A represents the state of outdoor air, point B represents the current state of indoor air, and point C represents the target state of indoor air. The state at point A is a state in which the dry bulb temperature is a measurement value of the outdoor temperature sensor (57a) and the relative humidity is a measurement value of the outdoor humidity sensor (58a). The state at point B is a state in which the dry bulb temperature is a measured value of the indoor temperature sensor (55a) and the relative humidity is a measured value of the indoor humidity sensor (56a). The state at point C is a state in which the dry bulb temperature is the target indoor temperature Ts and the absolute humidity is the absolute humidity at point B.

    First, the operation in which the minimum energy control unit (93b) calculates the air conditioning capability Q2 necessary for the outside air processing will be described. As shown in FIG. 14, the air conditioning capability Q2 required for the outside air processing is an air conditioning capability necessary for changing the outdoor air in the state of point A to the state of point C. Therefore, the minimum energy control unit (93b) calculates the difference h_2 in the specific enthalpy between the humid air in the state of point A and the humid air in the state of point C. Then, the minimum energy control unit (93b) calculates the air conditioning capability Q2 required for the outdoor air processing by multiplying the specific enthalpy difference h_2 by the flow rate Voa of the outdoor air supplied to the room by the outdoor air processing device (50) (Q2). = H_2 × Voa).

    Next, the operation in which the minimum energy control unit (93b) calculates the air conditioning capability Q1 necessary for indoor air conditioning will be described. As shown in FIG. 14, the air conditioning capability Q1 required for indoor air conditioning is the air conditioning capability required to change the room air in the state of point B to the state of point C. Also in the second embodiment, the minimum energy control unit (93b) performs the dry bulb temperature difference between the point B state and the point C state (that is, the difference between the measured value Tr of the indoor temperature sensor (55a) and the target indoor temperature Ts ( Tr-Ts)) and the rated capacity Qac0 of the air conditioner (20) are used to estimate the air conditioning capacity Q1 required for indoor air conditioning.

    Specifically, the minimum energy control unit (93b) has an air conditioning capability Q1 required for indoor air conditioning when the temperature difference (Tr−Ts) is equal to or larger than a predetermined reference value ΔTm (Tr−Ts ≧ ΔTm). If the temperature difference (Tr-Ts) is zero (Tr = Ts), it is estimated that the air conditioner (20) is equal to the rated capacity Qac0 (Q1 = Qac0). Is zero (Q1 = 0). Further, the minimum energy control unit (93b) determines the value of the temperature difference (Tr−Ts) when the temperature difference (Tr−Ts) is greater than zero and less than the reference value ΔTm (0 <Tr−Ts <ΔTm). It is estimated that the value obtained by multiplying the rated capacity Qac0 of the air conditioner (20) by the coefficient corresponding to is the value of the air conditioning capacity Q1 required for indoor air conditioning. That is, in the case of 0 <Tr−Ts <ΔTm, the minimum energy control unit (93b) sets the value of the air conditioning capability Q1 by using, for example, an equation “Q1 = {(Tr−Ts) / ΔTm} × Qac0”. presume.

=== Third action ===
When the second operation ends, the minimum energy control unit (93b) performs, as the third operation, the first target air conditioning capability Qac_set that the air conditioner (20) should exhibit and the second that the outside air processing device (50) should exhibit. The operation of determining the target air conditioning capability Qdc_set is performed. In this third operation, the minimum energy control unit (93b) performs air conditioning under the condition that the sum of the first target air conditioning capability Qac_set and the second target air conditioning capability Qdc_set is the total required capability Q (Q = Qac_set + Qdc_set). The first target air conditioning so that the sum of the power consumption Wac of the device (20) and the power consumption Wdc of the outside air processing device (50) (ie, the power consumption Ws (= Wac + Wdc) of the entire air conditioning system (10)) is minimized. The values of the capability Qac_set and the second target air conditioning capability Qdc_set are determined.

    Also in the second embodiment, the minimum energy control unit (93b) stores first operation characteristic data and second operation characteristic data in advance in order to perform the third operation. As in the first embodiment, the first operating characteristic data is data indicating the relationship between the air conditioning capability and power consumption in the air conditioner (20), and the second operating characteristic data is the air conditioning capability in the outside air processing device (50). And data showing the relationship between power consumption.

    In the second embodiment, the minimum energy control unit (93b) stores a plurality of patterns of the first and second operating characteristic data, and changes the first and second operating characteristic data used according to the state of the outdoor air. It is configured as follows. Specifically, for example, when the outdoor air is in the states of zones (2), (5), and (6), the relationship between the air conditioning capacity and power consumption derived from the same capacity / input characteristic equation The first and second operating characteristic data shown are used. On the other hand, when the outdoor air is in the state of zone (3), the evaporating temperature of the refrigerant in the use side heat exchanger (108) serving as an evaporator in the outdoor air processing refrigerant circuit (101) is the dew point of the outdoor air. High sensible heat type first and second operation characteristic data derived from a high sensible heat type capability / input characteristic equation that is higher than the temperature is used. When the outdoor air is in the zone (7), the first and second operation characteristic data for heating derived from the capacity / input characteristic equation for heating operation is used. Thus, in the second embodiment, different first and second operating characteristic data are used depending on the state of outdoor air. The first target air conditioning capability Qac_set to be exhibited by the air conditioner (20) and the second target air conditioning capability Qdc_set to be exhibited by the outside air processing device (50) are determined using the first and second operation characteristic data. The operation is the same as in the first embodiment.

=== Fourth operation ===
When the third operation ends, the minimum energy control unit (93b), as the fourth operation, includes a command value for the operating frequency of the air conditioning compressor (41) and a command value for the operating frequency of the outside air processing compressor (104). The action to determine is performed. Specifically, as in the first embodiment, the minimum energy control unit (93b) sets the operating frequency of the air conditioning compressor (41) corresponding to the target capacity ratio to the operating frequency of the air conditioning compressor (41). The operating frequency of the outside air processing compressor (104) corresponding to the target capacity ratio is set to the command value, and the operating frequency command value of the outside air processing compressor (104) is set.

=== Fifth action ===
When the fourth operation ends, the minimum energy control unit (93b) performs an operation of instructing the output frequency to the inverter that supplies electric power to each compressor (41, 104) as the fifth operation.

    Specifically, as in the first embodiment, the minimum energy control unit (93b) sets the air conditioning compressor (41) determined in the fourth operation to the inverter that supplies power to the air conditioning compressor (41). The operation frequency command value is transmitted as the output frequency command value of the inverter. As a result, the frequency of the electric power supplied to the air conditioning compressor (41) becomes the command value of the operating frequency of the air conditioning compressor (41) determined in the fourth operation, which is exhibited by the air conditioner (20). The air conditioning capacity becomes the first target air conditioning capacity.

    Further, as in the first embodiment, the minimum energy control unit (93b) controls the outside air processing compressor (104) determined in the fourth operation to the inverter that supplies power to the outside air processing compressor (104). The operation frequency command value is transmitted as the output frequency command value of the inverter. As a result, the frequency of the electric power supplied to the outside air processing compressor (104) becomes the command value of the operating frequency of the outside air processing compressor (104) determined in the fourth operation, and the outside air processing device (50) The air conditioning capability to be exhibited is the second target air conditioning capability.

    As described above, also in the second embodiment, the same effect as in the first embodiment can be obtained.

    Further, according to the second embodiment, since the ventilation region is set based on the neutral air zone that is in an air state close to the temperature and humidity of the room air, the ventilation region can be easily set.

    Further, in the second embodiment, the minimum energy control unit (93b) is in a state of the zone (3) in which the outdoor air state is equal to or lower than the absolute humidity of the air in the zone (1) and the zone (4) that are the ventilation region. In some cases, using the high sensible heat type first and second operation characteristic data derived from the high sensible heat type capacity / input characteristic equation, the air conditioning capacity required for the entire air conditioning system (10) (total required capacity Q ) To search for the optimum point. Thereby, outdoor air will be cooled with the refrigerant | coolant of temperature higher than the dew point temperature of this outdoor air. That is, when the absolute humidity of the outdoor air is sufficiently low as in a conventional outside air processing apparatus, the outdoor air can be cooled to a desired temperature without being wasted and dehumidified. Therefore, since wasteful energy consumption can be suppressed, the energy consumption can be suppressed to the minimum necessary in the air conditioning system (10). In the state of zone (3), the minimum energy control unit (93b) also sets the evaporation temperature of the air conditioning refrigerant circuit (30) higher than the dew point temperature of the room air on the air conditioner (20) side. It is good also as temperature. In this case, further energy saving can be achieved.

    In the second embodiment, the outside air processing refrigerant circuit (101) is configured such that the refrigerant circulation direction is reversible, and the outdoor air is cooled in the use side heat exchanger (108) operating as an evaporator in the cooling operation. On the other hand, in the heating operation, outdoor air is heated in the use side heat exchanger (108) operating as a condenser. However, the outside air processing refrigerant circuit (101) is configured so that the refrigerant circulates only in the direction in which the use-side heat exchanger (108) operates as an evaporator. In the heating operation, the outdoor air is cooled by the heater (102). It is good also as heating.

    In the second embodiment, the heater (102) may not be provided.

-Modification 1 of Embodiment 2
In the second embodiment, the air conditioning controller (91) adjusts the air conditioning capability exhibited by the air conditioner (20) by controlling the output frequency of the inverter connected to the air conditioning compressor (41). It was. Further, the outside air processing side controller (92) adjusts the air conditioning capability exhibited by the outside air processing device (50) by controlling the output frequency of the inverter connected to the outside air processing compressor (104). However, the method for adjusting the air conditioning capability of the air conditioner (20) and the method for adjusting the air conditioning capability of the outside air processing device (50) are not limited thereto.

    The modification 1 of Embodiment 2 changes the adjustment method of the air-conditioning capability of an air conditioning apparatus (20) and the adjustment method of the air-conditioning capability of an external air processing apparatus (50) in Embodiment 2.

    Specifically, during the cooling operation, the air conditioning controller (91) causes the evaporation temperature in the air conditioning refrigerant circuit (30) to be a predetermined evaporation temperature at which the air conditioner (20) exhibits a desired air conditioning capability. As described above, by adjusting the output frequency of the inverter connected to the compressor for air conditioning (41) or the opening of the outdoor expansion valve (45), the air conditioning capacity exhibited by the air conditioner (20) is adjusted. It is configured.

    Further, the outside air processing side controller (92) is configured such that the temperature of the air that has passed through the use side heat exchanger (108) of the outside air processing device (50) is such that the outside air processing device (50) exhibits a desired air conditioning capability. Thus, the air-conditioning capability exhibited by the outside air processing device (50) is adjusted by adjusting the output frequency of the inverter connected to the outside air processing compressor (104).

    Even with such a configuration, the same effects as those of the second embodiment can be obtained.

-Modification 2 of Embodiment 2
In the second modification of the second embodiment, the ventilation region in the second embodiment can be changed by the user of the air conditioning system (10).

    Specifically, also in the second modification, an air region that is a combination of the zone (1) and the zone (4) shown in FIG. ) Can be changed by the user using a remote controller or the like.

    According to such a configuration, the zone (5) and the zone (6) in which the humidity of the outdoor air is higher than the desired humidity is set as a ventilation region at the user's judgment, so that the cooling operation with high energy consumption is not performed. Since the ventilation operation with low energy consumption is performed, the energy consumption can be suppressed to the minimum necessary according to the user's demand.

—Modification 3 of Embodiment 2—
In the second embodiment, the minimum energy control by the minimum energy control unit (93b) is performed using the first and second operation characteristic data indicating the relationship between the air conditioning capacity and the power consumption derived from the capacity / input characteristic equation. (10) It was performed by predictive control that searches for an optimum point for sharing the air conditioning capacity (total required capacity Q) required for the whole. However, the minimum energy control by the minimum energy control unit (93b) is not limited to such predictive control.

    In Modification 3, the minimum energy control unit (93b) is an inverter connected to each compressor (41, 104) so that the sum of the current values of the air conditioner (20) and the outside air processing device (50) is minimized. The minimum energy control is performed by the PID control that adjusts the output frequency. Specifically, the minimum energy control unit (93b) is configured to adjust the air conditioner (20) so that the room temperature detected by each room temperature sensor (56a, 56b) becomes the target room temperature Ts that is the temperature in the ventilation region. The operation of the outdoor air processing device (50) is controlled so that the temperature of the outdoor air detected by the outdoor temperature sensor (57a) becomes a predetermined target temperature that is the temperature in the ventilation region. The minimum energy control unit (93b) is configured to receive the current values of the air conditioner (20) and the outside air processing device (50), and the total of these current values is set as a target value. The operation of the air conditioner (20) and the outside air processing device (50) is controlled so as to minimize the above. Each operation is controlled by changing the output frequency of the inverter connected to each compressor (41, 104), for example. Even with such a configuration, the same effects as those of the second embodiment can be obtained.

    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 an air conditioner that adjusts the temperature of indoor air and an outdoor air processing device that adjusts the temperature or temperature and humidity of outdoor air supplied to the room. is there.

10 Air conditioning system
20 Air conditioner
30 Refrigerant circuit for air conditioning (first refrigerant circuit)
41 Air-conditioning compressor (compressor)
50 Outside air treatment device
60 Humidity conditioning refrigerant circuit (second refrigerant circuit)
71 Humidity control compressor (compressor)
90 Control system (control means)
93a Judgment part
93b Minimum energy control unit
93c Ventilation operation control unit 101 Outside air processing refrigerant circuit (second refrigerant circuit)
104 Compressor for external air processing (compressor)

Claims (10)

An air conditioner (20) that supplies the indoor air after adjusting the temperature at least after adjusting the temperature, and an outdoor air processing operation that supplies the outdoor air after adjusting the temperature or temperature and humidity. An outside air treatment device (50) for performing a ventilation operation for supplying outdoor air to the room as it is, and a control means (90) for controlling the operation of the air conditioner (20) and the outside air treatment device (50). An air conditioning system,
The control means (90)
A determination unit (93a) for determining whether the temperature and humidity of the outdoor air are in a predetermined ventilation region;
When the determination unit (93a) determines that the outdoor air is not in the ventilation region, the air conditioner (20) and the outdoor air processing device are configured so that the indoor air and the outdoor air are in the ventilation region. (50), and a minimum energy control unit (93b) for controlling the operation so that the sum of the energy consumption of the air conditioner (20) and the energy consumption of the outside air treatment device (50) is minimized,
When the determination unit (93a) determines that the outdoor air is in the ventilation region, the determination unit (93a) includes at least a ventilation operation control unit (93c) that causes the outside air processing device (50) to perform the ventilation operation. An air conditioning system characterized by In claim 1,
The ventilation operation control unit (93c) is configured to control the operation of the air conditioner (20) according to an indoor air conditioning load during the ventilation operation of the outside air processing device (50). An air conditioning system characterized by In claim 1 or 2,
The minimum energy control unit (93b) is a first target air conditioning capability that is the air conditioning capability that the air conditioner (20) should exhibit, and a second target that is the air conditioning capability that the outside air processing device (50) should exhibit. The air conditioning capacity is determined under the condition that the sum of the first target air conditioning capacity and the second target air conditioning capacity is equal to the air conditioning capacity required of the air conditioning system. Determining the sum of energy consumption of the device (50) to be minimum, and controlling the operation of the air conditioner (20) so that the air conditioner (20) exhibits the first target air conditioning capability; An air conditioning system configured to control the operation of the outside air processing device (50) so that the outside air processing device (50) exhibits the second target air conditioning capability. In claim 3,
The minimum energy control unit (93b)
First operation characteristic data indicating the relationship between air conditioning capability and energy consumption in the air conditioner (20) and second operation characteristic data indicating the relationship between air conditioning capability and energy consumption in the outside air processing device (50) are stored in advance. And
An air conditioning system configured to determine the first target air conditioning capability and the second target air conditioning capability based on the first operation characteristic and the second operation characteristic. In claim 3 or 4,
The air conditioner (20) includes a first refrigerant circuit (30) to which a compressor (41) is connected to perform a refrigeration cycle, and allows the indoor air to exchange heat with the refrigerant of the first refrigerant circuit (30). Is configured to regulate the temperature of indoor air,
The outdoor air processing device (50) includes a second refrigerant circuit (101) connected to a compressor (71) to perform a refrigeration cycle. During the outdoor air processing operation, the taken-out outdoor air is used as the second refrigerant circuit (101). An air conditioning system configured to adjust the temperature or temperature and humidity of outdoor air by exchanging heat with the refrigerant in the refrigerant circuit (101). In claim 3 or 4,
The air conditioner (20) includes a first refrigerant circuit (30) to which a compressor (41) is connected to perform a refrigeration cycle, and allows the indoor air to exchange heat with the refrigerant of the first refrigerant circuit (30). Is configured to regulate the temperature of indoor air,
The outside air processing device (50) includes a second refrigerant circuit (60) to which a compressor (71) is connected to perform a refrigeration cycle, and an adsorbent that is cooled or heated by the refrigerant in the second refrigerant circuit (60). And an air conditioning system configured to adjust the temperature and humidity of the outdoor air by bringing the outdoor air into contact with the adsorbent. In claim 5,
The air conditioning system, wherein the ventilation region is set based on a predetermined neutral air zone that is in an air state close to the temperature and humidity of room air. In any one of Claims 5 thru | or 7,
The control means (90) adjusts the operating capacity of the compressor (41) connected to the first refrigerant circuit (30) so that the air conditioner (20) exhibits the first air conditioning capability. The operation capacity of the compressor (71, 104) connected to the second refrigerant circuit (60, 101) is adjusted so that the outside air processing device (50) exhibits the second air conditioning capability. An air conditioning system characterized by In any one of Claims 5 thru | or 7,
The control means (90) is configured so that the evaporation temperature of the refrigerant in the first refrigerant circuit (30) becomes a predetermined evaporation temperature at which the air conditioner (20) exhibits the first air conditioning capability. Adjusting the operating capacity of the compressor (41) connected to the first refrigerant circuit (30) and taking it into the outside air processing device (50) to exchange heat with the refrigerant in the second refrigerant circuit (101) Operation of the compressor (104) connected to the second refrigerant circuit (101) so that the temperature of the air becomes a predetermined temperature at which the outside air processing device (50) exhibits the second air conditioning capability. An air conditioning system configured to adjust capacity. In claim 1 or 2,
The minimum energy control unit (93b) is configured so that the sum of the current value flowing through the air conditioner (20) and the current value flowing through the outside air treatment device (50) is minimized. And an air conditioning system configured to perform PID control of the operation of the outside air processing device (50).

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