JP7392737B2 - Air conditioning system and air conditioning system control method - Google Patents

Description

The present invention relates to an air conditioning system and a method of controlling the air conditioning system.

Conventionally, there is an air conditioner that performs air conditioning using a refrigeration cycle. Such an air conditioner has a compressor that compresses refrigerant by being driven by an electric motor.

In addition, as disclosed in Patent Document 1, for example, the connection state of the compressor, the power supply device (in Patent Document 1, the inverter is applicable) that supplies power to the compressor f motor, and the electric motor and the power supply device. There is a motor drive device that includes a connection switching device that switches between a connection state in which the connection method of the windings of the motor is star connection and a connection state in which the connection method of the windings of the motor is delta connection. Note that the wiring state refers to the electrical connection state. Patent Document 1 also states that in order to ensure connection switching control, before switching the connection state between the motor and the power supply device, the motor is stopped or the rotation speed is reduced to a speed that does not cause problems in switching control. It is disclosed that switching occurs.

Japanese Patent Application Publication No. 2006-246674

If the electric motor is stopped before switching the connection state between the electric motor and the power supply device, the air conditioner will no longer be able to perform air conditioning. Moreover, when the rotational speed of the electric motor is reduced to a rotational speed that causes no problem in switching control, the air conditioning ability of the air conditioner also decreases. In particular, if switching the connection state between the electric motor and the power supply device continues several times and fails, the period during which the electric motor is stopped or the rotational speed of the electric motor is reduced becomes prolonged. The air conditioner using the electric motor drive device disclosed in Patent Document 1 has a problem that the air conditioning load increases when the period when the electric motor is stopped or the rotation speed of the electric motor is reduced becomes long. arise. Moreover, the problem arises that user comfort is impaired due to an increase in air conditioning load. However, despite this problem, there was no way to notify other devices that the air conditioner was switching the connection state between the electric motor and the power supply device.

The present disclosure provides an air conditioning system that can notify that an air conditioner is switching the connection state between the electric motor and the power supply device when switching the connection state between the electric motor and the power supply device, and a method for controlling the air conditioning system. The purpose is to obtain the law .

An air conditioning system according to an aspect of the present disclosure includes a first air conditioner that has a compressor that compresses a refrigerant by driving an electric motor, and that circulates the refrigerant to cool air in an air conditioning target space; A second air conditioner, which is a cooling device that cools the air in the space and is a device different from the first air conditioner, a power supply unit that supplies power to the electric motor, and a connection state between the electric motor and the power supply unit. a connection switching unit for switching , and before the connection switching unit switches the connection state between the electric motor and the power supply unit, the power supply unit reduces the voltage or frequency of the electric power supplied to the electric motor, and the first air conditioner When the connection switching start signal is transmitted and the second air conditioner receives the connection switching start signal or the signal generated based on the connection switching start signal, the second air conditioner changes the cooling capacity to the connection switching start signal or the connection switching start signal. The cooling capacity is changed to a higher cooling capacity than the one before receiving the signal generated based on the signal .
Further, an air conditioning system according to an aspect of the present disclosure includes a first air conditioning device that includes a compressor that compresses a refrigerant by driving an electric motor, and that circulates the refrigerant to dehumidify air in an air conditioning target space. , a second air conditioner that is a dehumidifier that dehumidifies the air in an air conditioned space and is different from the first air conditioner; a power supply section that supplies power to the electric motor; a connection switching section that switches the connection state of the motor and the power supply section, and before the connection switching section switches the connection state of the motor and the power supply section, the power supply section first reduces the voltage or frequency of the power supplied to the motor. The second air conditioner transmits a connection switching start signal, and when the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, the second air conditioner transmits the connection switching start signal or the dehumidification capacity. The dehumidifying capacity is changed to a higher dehumidifying capacity than the dehumidifying capacity before receiving the signal generated based on the connection switching start signal.
Further, an air conditioning system according to one aspect of the present disclosure includes a first air conditioning device that includes a compressor that compresses a refrigerant by driving an electric motor, and that humidifies air in an air conditioning target space by circulating the refrigerant. , a second air conditioner that is a humidifier that humidifies the air in an air conditioned space and is different from the first air conditioner; a power supply section that supplies power to the electric motor; a connection switching section that switches the connection state of the motor and the power supply section, and before the connection switching section switches the connection state of the motor and the power supply section, the power supply section first reduces the voltage or frequency of the power supplied to the motor. The second air conditioner transmits a connection switching start signal, and when the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, the second air conditioner transmits the connection switching start signal or the humidifying capacity. The humidifying capacity is changed to a humidifying capacity larger than the humidifying capacity before receiving the signal generated based on the connection switching start signal.
Further, an air conditioning system according to an aspect of the present disclosure includes a first air conditioning device that includes a compressor that compresses a refrigerant by driving an electric motor, and that circulates the refrigerant and supplies ions to the air in an air conditioning target space. a second air conditioner which is an ion generator that supplies ions to the air in the air conditioned space and which is different from the first air conditioner; a power supply section that supplies power to the electric motor; and a connection switching section that switches the connection state of the power supply section, and the power supply section reduces the voltage or frequency of the power supplied to the motor before the connection switching section switches the connection state of the motor and the power supply section. The first air conditioner transmits a connection switching start signal, and when the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, the second air conditioner changes the ion supply capacity to the connection. The ion supply capacity is changed to a higher ion supply capacity than the ion supply capacity before receiving the signal generated based on the switching start signal or the connection switching start signal.

A method for controlling an air conditioning system according to an aspect of the present disclosure includes: a first air conditioning device that has a compressor that compresses a refrigerant by driving an electric motor, and that circulates the refrigerant to cool the air in an air conditioning target space; a second air conditioner which is a cooling device that cools the air in the space to be air conditioned and which is different from the first air conditioner; a power supply section that supplies power to the electric motor; A connection switching unit that switches the connection state; a first step of reducing the voltage or frequency of the power supplied to the electric motor by the power supply unit; and a first step in which the first air conditioner switches the connection. a second step of transmitting a start signal; a third step, which is performed after the first step and the second step are completed, and in which the connection switching section switches the connection state of the electric motor and the power supply section ; a fourth step carried out after the completion of the fourth step in which the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal; and a fourth step carried out after the fourth step is completed. , a fifth step in which the second air conditioner changes the cooling capacity to a higher cooling capacity than the cooling capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal; Be prepared.
A method for controlling an air conditioning system according to an aspect of the present disclosure includes a first air conditioning apparatus that includes a compressor that compresses a refrigerant by driving an electric motor, and dehumidifies air in an air conditioning target space by circulating the refrigerant. , a second air conditioner that is a dehumidifier that dehumidifies the air in an air conditioned space and is different from the first air conditioner; a power supply unit that supplies power to the electric motor; and the electric motor and the power supply unit. A connection switching unit that switches the connection state of the air conditioner. a second step of transmitting a connection switching start signal; a third step that is carried out after the first step and the second step are completed, and in which the connection switching section switches the connection state of the electric motor and the power supply section; A fourth step is carried out after the second step is completed, and the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, and the fourth step is completed. a fifth step, which is performed after the second air conditioner changes the dehumidifying capacity to a dehumidifying capacity higher than the dehumidifying capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal; and.
A method for controlling an air conditioning system according to an aspect of the present disclosure includes a first air conditioning apparatus that includes a compressor that compresses a refrigerant by driving an electric motor, and that humidifies air in an air conditioning target space by circulating the refrigerant. , a second air conditioner that is a humidifier that humidifies the air in the air conditioned space and is different from the first air conditioner; a power supply unit that supplies power to the electric motor; and the electric motor and the power supply unit. A connection switching unit that switches the connection state of the air conditioner. a second step of transmitting a connection switching start signal; a third step that is carried out after the first step and the second step are completed, and in which the connection switching section switches the connection state of the electric motor and the power supply section; A fourth step is carried out after the second step is completed, and the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, and the fourth step is completed. a fifth step, which is performed after the second air conditioner changes the humidification capacity to a humidification capacity greater than the humidification capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal; and.
A method for controlling an air conditioning system according to an aspect of the present disclosure includes a first air conditioning apparatus that includes a compressor that compresses a refrigerant by driving an electric motor, circulates the refrigerant, and supplies ions to the air in an air-conditioned space. a second air conditioner that is an ion generator that supplies ions to the air in the air conditioned space and is different from the first air conditioner; a power supply section that supplies power to the electric motor; A connection switching unit that switches the connection state of the power supply unit. A second step in which the harmonizing device transmits a connection switching start signal, and a third step in which the connection switching section switches the connection state between the motor and the power supply section are carried out after the first step and the second step are completed. a fourth step, which is carried out after the second step is completed, in which the second air conditioner receives a connection switching start signal or a signal generated based on the connection switching start signal; The second air conditioner changes its ion supply capacity to an ion supply capacity higher than the ion supply capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. a fifth step of changing.

An air conditioning system according to an embodiment of the present disclosure and a method for controlling an air conditioning system according to an embodiment of the present disclosure, before switching the connection state between the electric motor and the power supply section or the electric motor and the power supply device, This configuration transmits a switching start signal. With this configuration, it is possible to convey to other devices that the air conditioner is switching the connection state between the electric motor and the power supply unit.

1 is a schematic diagram of an air conditioning system according to Embodiment 1. FIG. FIG. 2 is a refrigerant circuit diagram of the first air conditioner according to the first embodiment. 2 is an electric circuit diagram of a compressor-side motor, a power supply device, and a connection switching device in a case where the winding connection method of the compressor-side motor of the first air conditioner according to the first embodiment is a star connection. FIG. FIG. 2 is an electrical circuit diagram of the compressor-side motor, the power supply device, and the connection switching device in the first air conditioner according to the first embodiment, in which the winding connection method of the compressor-side motor is delta connection. 1 is an electrical circuit diagram of a relay circuit according to Embodiment 1. FIG. 3 is a graph showing the relationship between the efficiency of the compressor-side electric motor and the rotation speed of the compressor-side electric motor of the air conditioning system according to the first embodiment. 1 is a block diagram showing a hardware configuration of an air conditioning system according to Embodiment 1. FIG. 1 is a block diagram showing a functional configuration of an air conditioning system according to Embodiment 1. FIG. FIG. 3 is a flowchart showing connection switching processing of the air conditioning system according to the first embodiment. FIG. 3 is a sequence diagram showing connection switching processing of the air conditioning system according to the first embodiment. FIG. 2 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 2. FIG. FIG. 7 is a flowchart showing connection switching processing of the air conditioning system according to Embodiment 2; FIG. 7 is a sequence diagram showing connection switching processing of the air conditioning system according to Embodiment 2. FIG. 3 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 3. FIG. FIG. 7 is a flowchart diagram showing connection switching processing of the air conditioning system according to Embodiment 3; FIG. 7 is a sequence diagram showing connection switching processing of the air conditioning system according to Embodiment 3; FIG. 3 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 4. FIG. FIG. 7 is a flowchart diagram showing connection switching processing of the air conditioning system according to Embodiment 4; FIG. 7 is a flowchart diagram showing ventilation fan side processing of the air conditioning system according to Embodiment 4; FIG. 12 is a flowchart diagram showing a first air conditioner side process of the air conditioning system according to Embodiment 4. FIG. FIG. 7 is a sequence diagram showing connection switching processing of the air conditioning system according to Embodiment 4; It is a schematic diagram of the air conditioning system concerning Embodiment 5. FIG. 7 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 5. FIG. FIG. 12 is a flowchart showing connection switching processing of the air conditioning system according to Embodiment 5; FIG. 12 is a sequence diagram showing connection switching processing of the air conditioning system according to Embodiment 5. FIG. It is a schematic diagram of the air conditioning system concerning Embodiment 6. FIG. 7 is a block diagram showing the functional configuration of an air conditioning system according to a sixth embodiment. FIG. 12 is a flowchart diagram showing connection switching processing of the air conditioning system according to Embodiment 6; FIG. 12 is a sequence diagram showing connection switching processing of the air conditioning system according to Embodiment 6. FIG. It is a schematic diagram of the air conditioning system concerning Embodiment 7. FIG. 7 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 7. FIG. 13 is a flowchart diagram showing connection switching processing of the air conditioning system according to Embodiment 7; FIG. 7 is a sequence diagram showing connection switching processing of the air conditioning system according to Embodiment 7; It is a schematic diagram of the air conditioning system concerning Embodiment 8. FIG. 7 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 8. FIG. FIG. 12 is a flowchart showing connection switching processing of the air conditioning system according to Embodiment 8. FIG. 12 is a sequence diagram showing connection switching processing of the air conditioning system according to Embodiment 8. FIG. FIG. 7 is a schematic diagram of an air conditioning system according to a ninth embodiment. FIG. 12 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 9. FIG. FIG. 12 is a flowchart diagram illustrating connection switching processing of the air conditioning system according to Embodiment 9; FIG. 12 is a sequence diagram showing connection switching processing of the air conditioning system according to Embodiment 9. FIG.

An air conditioner and an air conditioning system according to embodiments of the present disclosure will be described based on the drawings. Note that the present disclosure is not limited to the following embodiments, and may be modified or omitted without departing from the spirit of the present disclosure. Furthermore, it is also possible to appropriately combine the configurations of the air conditioning system, the control method of the air conditioning system, the configuration of the air conditioner, and additional configurations according to each embodiment and modification.

In each embodiment, the air conditioning system includes at least a first air conditioner 100 and a second air conditioner. The air conditioner in the present disclosure refers to a device that intentionally changes the state of the air in a space to be air conditioned. Here, the air condition that the air conditioner changes includes, for example, air temperature, air humidity, amount of gas components in the air such as carbon dioxide concentration, amount of dust in the air, amount of ions in the air, etc. can be mentioned.

Embodiment 1.
FIG. 1 is a schematic diagram of an air conditioning system according to Embodiment 1. The air conditioning system 1 includes a first air conditioner 100, a ventilation fan 200 corresponding to a second air conditioner, and a management device 300. The first air conditioner 100 and the ventilation fan 200 change the state of the air in the indoor space 21, which is the space inside the building 2. Therefore, the indoor space 21 corresponds to the air conditioning target space.

The first air conditioner 100 will be explained. The first air conditioner 100 conditions the air in the indoor space 21 so that the temperature of the air in the indoor space 21 at least reaches a predetermined set temperature. The first air conditioner 100 includes an outdoor unit 101 and an indoor unit 102. The outdoor unit 101 is installed in an outdoor space 22 that is a space outside the building 2, and the indoor unit 102 is installed in the indoor space 21. The outdoor unit 101 and the indoor unit 102 are connected by a first pipe 103 and a second pipe 104. In the first air conditioner 100, an outdoor unit 101, an indoor unit 102, a first pipe 103, and a second pipe 104 form a refrigerant circuit in which refrigerant circulates. Further, the first air conditioner 100 has two operation modes: a cooling operation mode in which the air in the indoor space 21 is cooled, and a heating operation mode in which the air in the indoor space 21 is heated.

The outdoor unit 101 includes a compressor 105, a power supply device 106, a connection switching device 107, and an outdoor unit control device 108. The indoor unit 102 has an indoor unit control device 109.

The compressor 105 compresses the refrigerant taken in through the suction port, converts it into a high-temperature, high-pressure gas state, and discharges it from the discharge port. The compressor 105 has a compressor-side electric motor 150, and has a mechanism that compresses the refrigerant sucked in when the compressor-side electric motor 150 is driven. Details of the compressor side electric motor 150 will be described later.

The power supply device 106 is a device for supplying power to the compressor side electric motor 150. Details of the power supply device 106 will be described later.

The connection switching device 107 is a device for switching the connection state between the compressor-side electric motor 150 and the power supply device 106. Details of the connection switching device 107 will be described later.

The outdoor unit control device 108 is a device for controlling the outdoor unit 101. Details of the outdoor unit control device 108 will be described later.

The indoor unit control device 109 is a device for controlling the indoor unit 102. For example, it controls the rotation speed of a fan for supplying air from the indoor space 21 to an indoor unit heat exchanger 113, which will be described later. In addition, the indoor unit control device 109 transmits a connection switching start signal and a connection switching end signal, which will be described later, to the management device 300.

FIG. 2 is a refrigerant circuit diagram of the first air conditioner according to the first embodiment. The first air conditioner 100 includes a compressor 105, a four-way valve 110, an outdoor unit heat exchanger 111, a pressure reducing device 112, and an indoor unit heat exchanger 113. The outdoor unit 101 also includes a compressor 105, a four-way valve 110, an outdoor unit heat exchanger 111, and a pressure reducing device 112. The indoor unit 102 has an indoor unit side heat exchanger 113. Furthermore, the compressor 105, the four-way valve 110, the outdoor unit side heat exchanger 111, the pressure reducing device 112, and the indoor unit side heat exchanger 113 are connected to the first pipe 103, the second pipe 104, the outdoor unit pipe 114, and the indoor unit A refrigerant circuit is formed by being connected to the machine pipe 115.

The four-way valve 110 switches the direction of the flow of refrigerant flowing through the refrigerant circuit. Specifically, the four-way valve 110 has a total of four ports: a first port 110a, a second port 110b, a third port 110c, and a fourth port 110d. The first port 110a is connected to the discharge port of the compressor 105 via the outdoor unit piping 114. The second port 110b is connected to one end of a flow path formed inside an outdoor unit heat exchanger 111, which will be described later, via an outdoor unit piping 114. The third port 110c is connected to the suction port of the compressor 105 via the outdoor unit piping 114. The fourth port 110d is connected to the other end of a flow path formed inside the indoor unit heat exchanger 113, which will be described later, via the outdoor unit piping 114, the second piping 104, and the indoor unit piping 115. Ru.

The outdoor unit heat exchanger 111 has a flow path formed therein, and heat exchange is performed between the refrigerant passing through the flow path and the air in the outdoor space 22 . The other end of the flow path formed inside the outdoor unit heat exchanger 111 is connected to the indoor unit heat exchanger via the outdoor unit piping 114, the pressure reducing device 112, the first piping 103, and the indoor unit piping 115. It is connected to one end of a flow path formed inside 113.

The pressure reducing device 112 reduces the pressure of the refrigerant passing therethrough. For the pressure reducing device 112, for example, an electronic expansion valve or a capillary tube is used.

The indoor unit side heat exchanger 113 has a flow path formed therein, and allows heat exchange between the refrigerant passing through the flow path and the air in the indoor space 21 .

Next, the flow of refrigerant when the operation mode of the first air conditioner 100 is the cooling operation mode will be described. When the operation mode of the first air conditioner 100 is the cooling operation mode, the four-way valve 110 connects the first port 110a and the second port 110b and connects the third port 110c as shown by the solid line in FIG. Connect the fourth port 110d.

First, the high temperature, high pressure gaseous refrigerant discharged from the compressor 105 flows into the flow path inside the outdoor unit heat exchanger 111. When the operation mode of the first air conditioner 100 is the cooling operation mode, the outdoor unit side heat exchanger 111 functions as a condenser, and the refrigerant passing through the flow path inside the outdoor unit side heat exchanger 111 is It is cooled by the air in the space 22. The cooled refrigerant becomes a low-temperature, high-pressure liquid state and flows out from the flow path inside the outdoor unit heat exchanger 111.

The refrigerant flowing out from the flow path inside the outdoor unit side heat exchanger 111 flows into the pressure reducing device 112 . The low temperature, high pressure, liquid state refrigerant that has flowed into the pressure reducing device 112 is depressurized, becomes a low temperature, low pressure, gas-liquid two-phase state, and flows out from the pressure reducing device 112.

The refrigerant flowing out from the pressure reducing device 112 flows into the flow path inside the indoor unit heat exchanger 113. When the operation mode of the first air conditioner 100 is the cooling operation mode, the indoor unit heat exchanger 113 functions as an evaporator, and the refrigerant passing through the flow path inside the indoor unit heat exchanger 113 is heated indoors. It is heated by the air in the space 21. In other words, the air in the indoor space 21 is cooled by the refrigerant passing through the flow path inside the indoor unit heat exchanger 113. The heated refrigerant becomes a high temperature, low pressure gas state and flows out from the indoor unit side heat exchanger 113.

The refrigerant flowing out from the indoor unit heat exchanger 113 is sucked into the compressor 105 through the suction port. The refrigerant sucked into the compressor 105 is discharged again in a high temperature, high pressure gas state.

Next, the flow of the refrigerant when the operation mode of the first air conditioner 100 is the heating operation mode will be described. When the operation mode of the first air conditioner 100 is the heating operation mode, the four-way valve 110 connects the first port 110a and the fourth port 110d as shown by the broken line in FIG. Connect the third port 110c.

First, the high temperature, high pressure gaseous refrigerant discharged from the compressor 105 flows into the flow path inside the indoor unit heat exchanger 113. When the operation mode of the first air conditioner 100 is the heating operation mode, the indoor unit heat exchanger 113 functions as a condenser, and the refrigerant passing through the flow path inside the indoor unit heat exchanger 113 is heated indoors. It is cooled by the air in the space 21. In other words, the air in the indoor space 21 is heated by the refrigerant passing through the flow path inside the indoor unit heat exchanger 113. The cooled refrigerant becomes a low-temperature, high-pressure liquid state and flows out from the flow path inside the indoor unit heat exchanger 113.

The refrigerant flowing out from the flow path inside the indoor unit side heat exchanger 113 flows into the pressure reducing device 112. The low temperature, high pressure, liquid state refrigerant that has flowed into the pressure reducing device 112 is depressurized, becomes a low temperature, low pressure, gas-liquid two-phase state, and flows out from the pressure reducing device 112.

The refrigerant flowing out from the pressure reducing device 112 flows into the flow path inside the outdoor unit heat exchanger 111. When the operation mode of the first air conditioner 100 is the heating operation mode, the outdoor unit side heat exchanger 111 functions as an evaporator, and the refrigerant passing through the flow path inside the outdoor unit side heat exchanger 111 is heated outdoors. It is heated by the air in space 22. The heated refrigerant becomes a high temperature, low pressure gas state and flows out from the outdoor unit side heat exchanger 111.

The refrigerant flowing out from the outdoor unit heat exchanger 111 is sucked through the suction port of the compressor 105. The refrigerant sucked into the compressor 105 is discharged again in a high temperature, high pressure gas state.

FIG. 3 is an electrical circuit diagram of the compressor-side motor, the power supply device, and the connection switching device in the first air conditioner according to Embodiment 1 when the winding connection method of the compressor-side motor is star connection. It is. FIG. 4 is an electrical circuit diagram of the compressor-side motor, the power supply device, and the connection switching device in the first air conditioner according to Embodiment 1 when the connection system of the windings of the compressor-side motor is delta connection. It is. Next, details of the compressor-side electric motor 150, the power supply device 106, and the connection switching device 107 will be described.

The compressor-side electric motor 150 is a three-phase induction motor having a U-phase winding 151, a V-phase winding 152, and a W-phase winding 153 in a stator, and a permanent magnet (not shown) in a rotor. The U-phase winding 151, the V-phase winding 152, and the W-phase winding 153 correspond to internal windings of the compressor-side motor 150, respectively. A first U-phase winding terminal 151a is provided at one end of the U-phase winding 151, and a second U-phase winding terminal 151b is provided at the other end of the U-phase winding 151. A first V-phase winding terminal 152a is provided at one end of the V-phase winding 152, and a second V-phase winding terminal 152b is provided at the other end of the V-phase winding 152. A first W-phase winding terminal 153a is provided at one end of the W-phase winding 153, and a second W-phase winding terminal 153b is provided at the other end of the W-phase winding 153.

Power supply device 106 includes a pair of input terminals 161, a rectifier 162, a capacitor 163, and an inverter 164.

The AC power source 3 is connected to the pair of input terminals 161 . AC power is supplied to the input terminal 161 from the AC power supply 3 .

The rectifier 162 rectifies the AC power supplied from the input terminal 161 into DC power. As the rectifier 162, for example, a diode bridge circuit that performs full-wave rectification is used. The DC power rectified by the rectifier 162 is supplied to the inverter 164.

Capacitor 163 smoothes the DC power rectified by rectifier 162. Capacitor 163 is connected in parallel to inverter 164.

Inverter 164 converts the DC power rectified by rectifier 162 into three-phase AC power. The inverter 164 is, for example, an inverter in which six switching elements are connected in a full bridge manner. The first switching element 164a and the second switching element 164b are connected in series. The third switching element 164c and the fourth switching element 164d are connected in series. The fifth switching element 164e and the sixth switching element 164f are connected in series. Further, the first switching element 164a and the second switching element 164b, the third switching element 164c and the fourth switching element 164d, and the fifth switching element 164e and the sixth switching element 164f are connected in parallel, respectively. . Furthermore, a first inverter terminal 164g is drawn out from the midpoint between the first switching element 164a and the second switching element 164b. A second inverter terminal 164h is drawn out from the midpoint between the third switching element 164c and the fourth switching element 164d. A third inverter terminal 164i is drawn out from the midpoint of the fifth switching element 164e and the sixth switching element 164f.

The connection switching device 107 switches the connection state between the compressor side electric motor 150 and the inverter 164. The connection switching device 107 includes three relay circuits 170. The three relay circuits 170 are respectively referred to as a first relay circuit 170a, a second relay circuit 170b, and a third relay circuit 170c.

FIG. 5 is an electrical circuit diagram of the relay circuit according to the first embodiment. Relay circuit 170 includes a first relay contact 171, a second relay contact 172, a third relay contact 173, a contact plate 174, and a coil 175. One end of contact plate 174 is connected to first relay contact 171 . The other end of the contact plate 174 is connected to either the second relay contact 172 or the third relay contact 173. Further, a biasing force is applied to the contact plate 174 so that the other end of the contact plate 174 connects to the second relay contact 172. The coil 175 switches between a state in which the other end of the contact plate 174 is connected to the second relay contact 172 and a state in which the other end of the contact plate 174 is connected to the third relay contact 173. . When current flows through coil 175 , coil 175 generates a magnetic field that attracts the other end of contact plate 174 to connect the other end of contact plate 174 to third relay contact 173 . Here, the force of the magnetic field generated by the coil 175 that attracts the other end of the contact plate 174 is larger than the biasing force applied to the other end of the contact plate 174. That is, when no current is flowing through the coil 175, the other end of the contact plate 174 is connected to the second relay contact 172 due to the biasing force, and the first relay contact 171 and the second relay contact 172 are connected to each other. It will be in a state where it will be connected. Further, when current is flowing through the coil 175, the other end of the contact plate 174 is connected to the third relay contact 173 due to the magnetic field of the coil 175, and the first relay contact 171 and the third relay contact 173 are connected to each other. becomes electrically connected.

Note that the first relay circuit 170a, the second relay circuit 170b, and the third relay circuit 170c each have the configuration of the relay circuit 170 described above. Here, when the configuration inside the relay circuit 170 is shown separately for each relay circuit 170a, 170b, and 170c, the reference numeral indicates each relay circuit 170a, 170b. Add 170c subscript. For example, when the first relay contact 171 of the first relay circuit 170a is shown, it is called the first relay contact 171a, and when the second relay contact 172 of the second relay circuit 170b is shown, it is called the second relay contact 172b. shall be.

Further, the connection switching device 107 is provided with a neutral point terminal 176. The neutral point terminal 176 is a terminal that becomes a neutral point during star connection, which will be described later.

The connection between the compressor side electric motor 150, the power supply device 106, and the connection switching device 107 will be explained.

A first U-phase winding terminal 151a and a second relay contact 172c of a third relay circuit 170c are connected to the first inverter terminal 164g. The first V-phase winding terminal 152a and the second relay contact 172a of the first relay circuit 170a are connected to the second inverter terminal 164h. The first W-phase winding terminal 153a and the second relay contact 172b of the second relay circuit 170b are connected to the third inverter terminal 164i. A first relay contact 171a of a first relay circuit 170a is connected to the second U-phase winding terminal 151b. A first relay contact 171b of a second relay circuit 170b is connected to the second V-phase winding terminal 152b. A first relay contact 171c of a third relay circuit 170c is connected to the second W-phase winding terminal 153b. Third relay contacts 173a, 173b, 173c of each relay circuit 170a, 170b, 170c are connected to neutral point terminal 176.

By connecting in this way, when no current flows through the coils 175a, 175b, 175c of each relay circuit 170a, 170b, 170c, the second U-phase winding terminal 151b and the second V-phase winding Line terminal 152b and second W-phase winding terminal 153b are connected to neutral point terminal 176. Further, when current is flowing through the coils 175a, 175b, 175c of each relay circuit 170a, 170b, 170c, the second U-phase winding terminal 151b is connected to the second inverter terminal 164h, and the second The V-phase winding terminal 152b is connected to the third inverter terminal 164i, and the second W-phase winding terminal 153b is connected to the first inverter terminal 164g. In other words, when no current flows through the coils 175a, 175b, 175c of each relay circuit 170a, 170b, 170c, the connection state between the compressor side electric motor 150 and the inverter 164 is the same as that between the U-phase winding 151 and the V-phase winding. The connection state between the winding 152 and the W-phase winding 153 is star connection. In addition, when current flows through the coils 175a, 175b, 175c of each relay circuit 170a, 170b, 170c, the connection state between the compressor side electric motor 150 and the inverter 164 is The connection state between the winding 152 and the W-phase winding 153 is a delta connection.

Next, details of the outdoor unit control device 108 will be explained. Outdoor unit control device 108 transmits a signal regarding whether to turn on or off the switching element of inverter 164 and transmits a signal regarding whether or not current should flow through coil 175 of relay circuit 170. By controlling the switching elements of the inverter 164, the outdoor unit control device 108 can control the frequency and voltage of the three-phase AC power output by the inverter 164. Furthermore, the outdoor unit control device 108 can control the rotation speed of the compressor-side electric motor 150 by controlling the frequency and voltage of the three-phase AC power output by the inverter 164. That is, the outdoor unit control device 108 can control the rotation speed of the compressor side electric motor 150. Furthermore, the outdoor unit control device 108 can switch the connection state between the compressor-side electric motor 150 and the power supply device 106 by controlling whether or not current flows through the coil 175 of the relay circuit 170. That is, the outdoor unit control device 108 can control the connection state between the compressor side electric motor 150 and the power supply device 106.

In the cooling operation mode, the larger the difference between the temperature of the air in the indoor space 21 and the set temperature (temperature of the air in the indoor space 21 - set temperature), the higher the air conditioning load on the first air conditioner 100 becomes. In addition, in the cooling operation mode, the higher the rotation speed of the compressor-side electric motor 150 of the compressor 105, the higher the ability to cool the air in the indoor space 21. Therefore, in the cooling operation mode, the outdoor unit control device 108 controls the power supply device 106 to increase the rotation speed of the compressor-side electric motor 150 as the difference between the temperature of the air in the indoor space 21 and the set temperature increases.

In the heating operation mode, the larger the difference between the set temperature and the temperature of the air in the indoor space 21 (set temperature - the temperature of the air in the indoor space 21), the higher the air conditioning load on the first air conditioner 100 becomes. In addition, in the heating operation mode, the higher the rotation speed of the compressor-side electric motor 150 of the compressor 105, the higher the ability to heat the air in the indoor space 21. Therefore, in the heating operation mode, the outdoor unit control device 108 controls the power supply device 106 such that the larger the difference between the set temperature and the temperature of the air in the indoor space 21 is, the higher the rotation speed of the compressor side electric motor 150 is.

FIG. 6 is a graph showing the relationship between the efficiency of the compressor-side electric motor and the rotation speed of the compressor-side electric motor of the air conditioning system according to the first embodiment. As shown in the graph of FIG. 6, when the connection system of the U-phase winding 151, V-phase winding 152, and W-phase winding 153 is star connection, when the rotation speed of the compressor side motor is N1, the compressor The efficiency of the side motor 150 is maximized. In addition, when the connection system of the U-phase winding 151, V-phase winding 152, and W-phase winding 153 is a delta connection, when the rotation speed of the compressor-side motor is N2 higher than N1, the compressor-side motor 150 efficiency is maximized. In addition, the region where the rotation speed of the compressor side electric motor is lower than N3 is the U-phase winding 151, the V-phase winding 152, and the W The efficiency of the compressor side motor is higher when the connection method with the phase winding 153 is star connection, and the region where the rotation speed of the compressor side motor is higher than N3 is the U phase winding 151 and the V phase winding. When the wire 152 and the W-phase winding 153 are connected in a delta connection, the efficiency of the compressor-side motor becomes higher. Therefore, when the air conditioning load is low and the compressor side electric motor 150 is rotated at a rotation speed lower than N3, the outdoor unit control device 108 changes the connection state between the compressor side electric motor 150 and the power supply device 106 to the U phase. It is desirable to control the connection switching device 107 so that the connection method of the winding 151, the V-phase winding 152, and the W-phase winding 153 is a star connection. In addition, in the case where the air conditioning load is high and the compressor side electric motor 150 is rotated at a rotation speed higher than N3, the outdoor unit control device 108 changes the connection state between the compressor side electric motor 150 and the power supply device 106 into a U-phase winding. It is desirable to control the connection switching device 107 so that the connection method of the line 151, the V-phase winding 152, and the W-phase winding 153 is a delta connection. Note that N3 can be determined experimentally or determined in advance by a designer.

Next, details of the ventilation fan 200 shown in FIG. 1 will be explained. The ventilation fan 200 ventilates the indoor space 21 by exchanging the air in the indoor space 21 with the air in the outdoor space 22. The air condition in the indoor space 21 is changed by ventilation, and ventilation is performed intentionally, so the ventilation fan 200 corresponds to an air conditioner. Further, the ventilation fan 200 of the first embodiment exhausts air from the indoor space 21 to the outdoor space 22. When the ventilation fan 200 performs exhaust air, the pressure in the indoor space 21 becomes lower than the pressure in the outdoor space 22. Therefore, air from the outdoor space 22 is supplied to the indoor space 21 through a gap such as a window or a door that connects the indoor space 21 and the outdoor space 22.

The ventilation fan 200 includes a fan 201, a ventilation fan side electric motor 202, and a ventilation fan control device 203.

The fan 201 blows air from the indoor space 21 to the outdoor space 22 by rotating. The higher the rotation speed of the fan 201, the more air from the indoor space 21 is blown into the outdoor space 22. That is, the higher the rotation speed of the fan 201, the greater the ventilation capacity of the ventilation fan 200, and the lower the rotation speed of the fan 201, the lower the ventilation capacity of the ventilation fan 200. Here, the ventilation capacity refers to the amount of air in the indoor space 21 that the ventilation fan 200 ventilates per unit time (for example, one hour). The higher the ventilation capacity, the greater the amount of air in the indoor space 21 that is ventilated per unit time.

The ventilation fan side electric motor 202 rotates the fan 201. An AC motor or a DC motor is used for the ventilation fan side motor 202.

The ventilation fan control device 203 controls the ventilation capacity of the ventilation fan 200. The ventilation fan control device 203 can change at least the rotation speed of the ventilation fan side electric motor 202. That is, the ventilation fan control device 203 can change the rotation speed of the fan 201 by changing the rotation speed of the ventilation fan side electric motor 202, and can change the ventilation capacity of the ventilation fan 200. In addition, as a means for changing the rotation speed of the ventilation fan side electric motor 202, the following means can be mentioned. When the ventilation fan side electric motor 202 is an AC motor, the ventilation fan control device 203 has an inverter and changes the voltage or frequency of the AC power supplied to the ventilation fan side electric motor 202 to change the rotation speed of the ventilation fan side electric motor 202. . When the ventilation fan side electric motor 202 is a DC motor, the ventilation fan control device 203 has a transformer and changes the voltage of the DC power supplied to the ventilation fan side electric motor 202 to change the rotation speed of the ventilation fan side electric motor 202.

Next, the management device 300 will be explained. The management device 300 is, for example, a HEMS (Home
An energy management system (Energy Management System) is a device that manages multiple devices such as controllers. The management device 300 is communicably connected to a plurality of devices by wire or wirelessly, and can receive signals containing information regarding the operation of the devices and transmit signals containing information for controlling the operations of the devices. Furthermore, the management device 300 may be communicably connected to an external network. In the first embodiment, the management device 300 is communicably connected to the indoor unit control device 109 and the ventilation fan control device 203, and manages at least the first air conditioner 100 and the ventilation fan 200.

FIG. 7 is a block diagram showing the hardware configuration of the air conditioning system according to the first embodiment. Next, the hardware configuration of the air conditioning system 1 will be explained.

The outdoor unit control device 108, the indoor unit control device 109, the ventilation fan control device 203, and the management device 300 include processors 108a, 109a, 203a, and 300a, main storage devices 108b, 109b, 203b, and 300b, and auxiliary storage devices 108c and 109c. , 203c, and 300c, communication devices 108d, 109d, 203d, and 300d, and buses 108e, 109e, 203e, and 300e that connect these devices so that they can communicate with each other.

The processors 108a, 109a, 203a, and 300a execute programs stored in the auxiliary storage devices 108c, 109c, 203c, and 300c to control internal hardware or process data in each device. The processors 108a, 109a, 203a, and 300a are, for example, CPUs (Central Processing
Unit).

The main storage devices 108b, 109b, 203b, and 300b read programs stored in the auxiliary storage devices 108c, 109c, 203c, and 300c, and are used as work areas for the processors 108a, 109a, 203a, and 300a. The main storage devices 108b, 109b, 203b, and 300b are volatile memories such as RAM (Random Access Memory), for example.

The auxiliary storage devices 108c, 109c, 203c, and 300c store programs executed by the processors 108a, 109a, 203a, and 300a, and data necessary for the processors 108a, 109a, 203a, and 300a to execute the programs. The auxiliary storage devices 108c, 109c, 203c, and 300c include, for example, ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), and EEPROM (Electrically Erasable Memory). This is non-volatile memory such as BLE Programmable Read Only Memory).

The communication devices 108d, 109d, 203d, and 300d transmit or receive signals with other communication devices 108d, 109d, 203d, and 300d wirelessly or by wire. The communication devices 108d, 109d, 203d, and 300d are, for example, wireless communication modules or wired communication interfaces.

Furthermore, the outdoor unit control device 108 and the ventilation fan control device 203 have interfaces 108f, 108g, and 203f, respectively. The interfaces 108f, 108g, and 203f convert control information input from the processors 108a and 203a into control signals, and transmit the control signals to each piece of hardware. The interface 108f converts control information for the inverter 164 into a control signal and transmits the control signal to the inverter 164. The interface 108g converts control information for the connection switching device 107 into a control signal and transmits the control signal to the connection switching device 107. The interface 203f converts control information for the ventilation fan side electric motor 202 into a control signal and transmits the control signal to the ventilation fan side electric motor 202. Note that the interfaces 108f and 108g are connected to the bus 108e, and the interface 203f is connected to the bus 203e.

FIG. 8 is a block diagram showing the functional configuration of the air conditioning system according to the first embodiment. Next, the functional configuration of the air conditioning system 1 will be explained.

The air conditioning system 1 includes a first air conditioner control section 1001, a power supply section 1002, a connection switching section 1003, a management section 1004, a ventilation control section 1005, and a ventilation section 1006.

The first air conditioner control unit 1001 controls the first air conditioner 100. In the first embodiment, a first air conditioner control section 1001 controls a power supply section 1002 and a connection switching section 1003. The first air conditioner control unit 1001 is realized by the processor 108a or 109a executing various processes according to programs stored in the auxiliary storage device 108c or 109c.

The power supply unit 1002 supplies power to the compressor side electric motor 150 based on a control signal from the first air conditioner control unit 1001. Power supply unit 1002 is realized by power supply device 106. Note that the first air conditioner control unit 1001 transmits a control signal to the power supply unit 1002 according to the air conditioning load in order to change the rotation speed of the compressor side electric motor 150 according to the air conditioning load. change.

The connection switching unit 1003 switches the connection state between the compressor side electric motor 150 and the power supply unit 1002 based on a control signal from the first air conditioner control unit 1001. The connection switching unit 1003 is realized by the connection switching device 107.

The management unit 1004 manages the first air conditioner 100 and the ventilation fan 200 based on the information included in the received signal. The management unit 1004 is realized by the processor 300a executing various processes according to programs stored in the auxiliary storage device 300c.

The ventilation control unit 1005 controls the ventilation fan 200. In the first embodiment, ventilation control section 1005 controls at least ventilation section 1006. The ventilation control unit 1005 is realized by the processor 203a executing various processes according to programs stored in the auxiliary storage device 203c.

The ventilation unit 1006 exchanges the air in the indoor space 21 with the air in the outdoor space 22 to ventilate the indoor space 21. The ventilation section 1006 is realized by a fan 201 and a ventilation fan side electric motor 202.

FIG. 9 is a flowchart showing connection switching processing of the air conditioning system according to the first embodiment. FIG. 10 is a sequence diagram showing connection switching processing of the air conditioning system according to the first embodiment. Next, the connection switching process of the air conditioning system 1 will be explained. Note that the connection switching process is a process performed when the first air conditioner control unit 1001 or the management unit 1004 determines to switch the connection state between the compressor side electric motor 150 and the power supply unit 1002. The conditions for performing the connection switching process in the first embodiment are such that the first air conditioner control switches the connection method of the windings of the compressor side electric motor 150 from star connection to delta connection. 1001, or when the first air conditioner control unit 1001 determines that the connection method of the windings of the compressor side electric motor 150 should be switched from delta connection to star connection. . More specifically, in the first embodiment, the first air conditioner control unit 1001 rotates the compressor side electric motor 150 at a rotation speed lower than the predetermined rotation speed N3 when the air conditioning load is low. It is determined that the connection system of the windings of the compressor-side electric motor 150 should be switched from a delta connection to a star connection. In addition, the first air conditioner control unit 1001 controls the windings of the compressor side electric motor 150 when the air conditioning load is high and the compressor side electric motor 150 is rotated at a rotation speed higher than a predetermined rotation speed N3. It is determined that the connection system should be switched from star connection to delta connection.

First, the process flow in the connection switching process of the air conditioning system 1 will be explained with reference to FIG. Note that, as a premise for starting the flowchart in FIG. 9, it is assumed that the power supply unit 1002 is supplying power to the compressor side electric motor 150, and the first air conditioner 100 and the ventilation fan 200 are operating. Further, while the connection switching process is being performed, the rotation speed of the compressor-side electric motor 150 is not changed in accordance with the air conditioning load.

When the air conditioning system 1 starts the connection switching process, the process first proceeds to step S100. In step S100, the first air conditioner control unit 1001 controls the power supply unit 1002 to stop supplying power to the compressor-side electric motor 150. Specifically, in step S100, the first air conditioner control unit 1001 turns off all of the first to sixth switching elements 164a to 164f of the inverter 164.

After completing the process in step S100, the process advances to step S110. In step S110, the ventilation control unit 1005 controls the ventilation unit 1006 to reduce the ventilation capacity. Specifically, when the ventilation fan side electric motor 202 is an AC motor, the ventilation control unit 1005 performs control to reduce the voltage or frequency of the AC power supplied to the ventilation fan side electric motor 202 in step S110. Further, when the ventilation fan side electric motor 202 is a DC motor, the ventilation control unit 1005 performs control to reduce the voltage of the DC power supplied to the ventilation fan side electric motor 202 in step S110.

After completing the process in step S110, the process advances to step S120. In step S120, the first air conditioner control unit 1001 controls the connection switching unit 1003 to switch the connection state between the compressor side electric motor 150 and the power supply unit 1002. Specifically, when the connection state between the compressor side electric motor 150 and the power supply section 1002 is such that the connection method of the windings of the compressor side electric motor 150 is a star connection, the first air conditioner control section 1001 Control is performed so that no current flows through the coils 175a, 175b, and 175c, and the connection state between the compressor-side motor 150 and the power supply unit 1002 is changed to a state in which the connection method of the windings of the compressor-side motor 150 is a delta connection. conduct. Further, when the connection state between the compressor-side electric motor 150 and the power supply unit 1002 is such that the connection method of the windings of the compressor-side electric motor 150 is a delta connection, the first air conditioner control unit 1001 is connected to the coil 175a. , 175b, and 175c to control the connection state between the compressor side electric motor 150 and the power supply section 1002 so that the connection system of the windings of the compressor side electric motor 150 is star connected.

After completing the process in step S120, the process advances to step S130. In step S130, the first air conditioner control unit 1001 controls the power supply unit 1002 to resume supplying power to the compressor-side electric motor 150. Specifically, in step S130, the first air conditioner control unit 1001 turns on or off the first to sixth switching elements 164a to 164f of the inverter 164 to supply three-phase AC power to the compressor side electric motor 150. control. In addition, in step S130, the first air conditioner control unit 1001 outputs the same voltage as the three-phase AC power that was being supplied to the compressor-side electric motor 150 before stopping the power supply to the compressor-side electric motor 150 in step S100. and frequency to supply three-phase AC power.

After completing the process in step S130, the process advances to step S140. In step S140, the ventilation control unit 1005 controls the ventilation unit 1006 to return the ventilation capacity to the ventilation capacity before performing the process in step S110. Specifically, if the ventilation fan side electric motor 202 is an AC motor, in step S140 the ventilation control unit 1005 changes the voltage or frequency of the AC power supplied to the ventilation fan side electric motor 202 to the voltage or frequency before step S110. control so that Further, when the ventilation fan side electric motor 202 is a DC motor, in step S140, the ventilation control unit 1005 controls the voltage of the DC power supplied to the ventilation fan side electric motor 202 to be the voltage before performing the process of step S110. I do.

After completing the process in step S140, the air conditioning system 1 ends the connection switching process.

Here, in the connection switching process, before the connection switching unit 1003 switches the connection state between the compressor side electric motor 150 and the power supply unit 1002 in step S120, the power supply to the compressor side electric motor 150 is stopped in step S100. Explain why. When power is being supplied to the compressor-side electric motor 150, current is flowing through the relay circuit 170 of the connection switching device 107. When the other end of the contact plate 174 is switched from the connected relay contact to another relay contact while current is flowing through the relay circuit 170, the other end of the contact plate 174 is switched from the connected relay contact to the other end of the contact plate 174. When the two separate, an arc discharge occurs. If arc discharge occurs, problems such as deterioration of the relay contacts or welding of the other end of the contact plate 174 and the relay contacts may occur. In order to prevent arc discharge from occurring, in the air conditioning system 1 according to the first embodiment, the power supply to the compressor side electric motor 150 is first stopped so that no current flows to the relay circuit 170, and then the compressor side electric motor 150 is stopped. The connection state between the side electric motor 150 and the power supply unit 1002 is switched.

Also, the reason why the ventilation capacity is reduced in the connection switching process will be explained. In the air conditioning system 1 of the first embodiment, the supply of power to the compressor-side electric motor 150 is stopped during the connection switching process, so the first air conditioner 100 is stopped during the connection switching process. Furthermore, before performing the connection switching process, the first air conditioner 100 conditions the air in the indoor space 21. Therefore, if the ventilation fan 200 performs ventilation when the first air conditioner 100 is stopped for a long time, the air conditioning load on the first air conditioner 100 will increase, and the comfort of the user will be reduced. It will be damaged. Furthermore, the higher the ventilation capacity of the ventilation fan 200, the greater the amount of increase in the air conditioning load of the first air conditioner 100, and the more the user's comfort is impaired. In the air conditioning system 1 of the first embodiment, since the ventilation capacity is reduced in the connection switching process, the ventilation capacity in the connection switching process is compared to the case where ventilation is continued with the same ventilation capacity as the ventilation capacity before the connection switching process. The amount of increase in the air conditioning load of the first air conditioner 100 is reduced, and the loss of user comfort is suppressed.

Next, communication in connection switching processing of the air conditioning system 1 will be described with reference to FIG. 10.

First, the first air conditioner 100 transmits a connection switching start signal to the management device 300 (step S200). The connection switching start signal is a signal transmitted from the first air conditioner 100 at the start of the connection switching process. In the first embodiment, the connection switching start signal includes information that informs devices other than first air conditioner 100 that switching of the connection state between compressor side electric motor 150 and power supply unit 1002 has started. Further, in the first embodiment, the connection switching start signal is transmitted from the indoor unit control device 109.

After receiving the connection switching start signal in step S200, the management device 300 transmits a ventilation capacity reduction signal to the ventilation fan 200 (step S210). The ventilation capacity reduction signal is a signal generated by the management device 300 based on the connection switching start signal, and is a signal that includes information for controlling the ventilation fan 200 to reduce the ventilation capacity of the ventilation fan 200. Further, in the first embodiment, the ventilation capacity reduction signal is transmitted to the ventilation fan control device 203.

After the ventilation fan 200 receives the ventilation capacity reduction signal in step S210, the process of step S110 in FIG. 9 is performed.

Further, after the first air conditioner 100 transmits the connection switching start signal in step S200, the process of step S100, the process of step S120, and the process of step S130 in FIG. 9 are sequentially performed.

After completing the process in step S130, the first air conditioner 100 transmits a connection switching end signal to the management device 300 (step S220). The connection switching end signal is a signal transmitted from the first air conditioner after the connection state is switched (after step S120 ends). In the first embodiment, the connection switching start signal includes information that informs devices other than first air conditioner 100 that switching of the connection state between compressor-side electric motor 150 and power supply unit 1002 has been completed. Further, in the first embodiment, the connection switching end signal is transmitted from the indoor unit control device 109.

After receiving the connection switching end signal in step S220, the management device 300 transmits a ventilation capacity increase signal to the ventilation fan 200 (step S230). The ventilation capacity increase signal is a signal generated by the management device 300 based on the connection switching end signal, and controls the ventilation fan 200 to increase the ventilation capacity of the ventilation fan 200 and return it to the ventilation capacity before receiving the ventilation capacity decrease signal. This is a signal that contains information that causes Further, in the first embodiment, the ventilation capacity increase signal is transmitted to the ventilation fan control device 203.

After the ventilation fan 200 receives the ventilation capacity increase signal in step S220, the process of step S140 in FIG. 9 is performed.

As described above, the configuration of the air conditioning system 1 according to the first embodiment includes a compressor 105 that compresses refrigerant by driving an electric motor (compressor-side electric motor 150 corresponds to this), and circulates the refrigerant to create an air conditioning target space. A first air conditioner 100 that conditions the air in the indoor space 21 (applicable to the indoor space 21), and a second air conditioner (ventilation fan) that conditions the air in the air conditioned space and is a device different from the first air conditioner 100 200 corresponds to), a power supply section 1002 that supplies power to the electric motor, and a connection switching section 1003 that switches the connection state between the motor and the power supply section 1002. Before switching the connection state, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the motor, the first air conditioner 100 transmits a connection switch start signal, and the second air conditioner switches the connection. It is configured to receive a signal (corresponding to a ventilation capacity reduction signal) generated based on a start signal or a connection switching start signal. In this configuration, before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the first air conditioner 100 transmits a connection switching start signal, and the second air conditioner transmits a connection switching start signal. In order to receive the signal or the signal generated based on the connection switching start signal, in the air conditioning system 1 according to the first embodiment, the first air conditioner 100 starts switching the connection state between the electric motor and the power supply unit 1002. This information can be transmitted to the second air conditioner.

Furthermore, the air conditioning system 1 according to the first embodiment has an additional configuration, after the connection switching section 1003 finishes switching the connection state between the electric motor (compressor side electric motor 150 corresponds to this) and the power supply section 1002. The first air conditioner 100 transmits a connection switching end signal, and the second air conditioner (corresponding to the ventilation fan 200) transmits a connection switching end signal or a signal (ventilation capacity increase signal) generated based on the connection switching end signal. applicable). With this additional configuration, the air conditioning system 1 according to the first embodiment notifies the second air conditioner that the first air conditioner 100 has finished switching the connection state between the electric motor and the power supply unit 1002. be able to. In particular, even if the switching of the connection state between the electric motor and the power supply unit 1002 fails multiple times in a row due to the influence of external disturbances, the first air conditioner 100 reliably completes the switching of the connection state between the electric motor and the power supply unit. This information can be transmitted to the second air conditioner.

Furthermore, in the air conditioning system 1 according to the first embodiment, as an additional configuration, the connection switching section 1003 changes the connection state between the electric motor (compressor side electric motor 150 corresponds to this) and the power supply section 1002 according to the windings of the electric motor. Switching from a connection state in which the wiring system is delta connection to a connection state in which the motor winding connection system is star connection, or switching from a connection state in which the motor winding connection system is star connection to a connection state in which the motor winding connection system is changed to star connection. It has a configuration that switches to a connection state that is a delta connection. With this additional configuration, the air conditioning system according to the first embodiment has the effect that the connection method of the windings of the motor can be selectively used between star connection and delta connection.

Furthermore, in the air conditioning system 1 according to the first embodiment, as an additional configuration, the second air conditioner (corresponding to the ventilation fan 200) is configured to send a connection switching start signal or a signal generated based on the connection switching start signal ( When the ventilation capacity reduction signal (corresponding to It has a configuration that changes the operating state so that the amount of increase in air conditioning load becomes smaller. With this additional configuration, the air conditioning system 1 according to Embodiment 1 can maintain the air conditioning system at the time of connection switching even if the period when the electric motor is stopped or the period when the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing an increase in load. Moreover, with the additional configuration, the air conditioning system 1 according to the first embodiment has the effect of suppressing the loss of user comfort due to an increase in the air conditioning load.

Furthermore, the air conditioning system 1 according to Embodiment 1 has an additional configuration in which the second air conditioner connects the air in the air conditioning target space (indoor space 21 is applicable) with the air in a space different from the air conditioning target space (corresponding to the indoor space 21). The ventilation device is a ventilation device (the ventilation fan 200 is the case) that exchanges air with the air in the outdoor space 22 (the outdoor space 22 is the case), and the ventilation device is a connection switching start signal or a signal generated based on the connection switching start signal (the ventilation capacity reduction signal is the case). The ventilation capacity is configured to change the ventilation capacity to a ventilation capacity lower than the ventilation capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. With this additional configuration, in the air conditioning system 1 according to the first embodiment, when the second air conditioner is a ventilation device, the period when the electric motor is stopped or the rotational speed of the electric motor is reduced becomes longer. This is effective in suppressing an increase in the air conditioning load when switching connections even if the connection is changed. Moreover, with the additional configuration, the air conditioning system 1 according to the first embodiment has the effect of suppressing the loss of user comfort due to an increase in the air conditioning load.

Furthermore, in the air conditioning system 1 according to the first embodiment, as an additional configuration, the ventilation device (corresponding to the ventilation fan 200) has a connection switching end signal or a signal generated based on the connection switching end signal (ventilation capacity increase). A configuration that changes the ventilation capacity of the ventilator to the ventilation capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal (the ventilation capacity reduction signal corresponds) after receiving the connection switching start signal (corresponding signal). has. With the additional configuration, the air conditioning system 1 according to the first embodiment has the effect of suppressing a significant decrease in the amount of ventilation.

In addition, the control method for the air conditioning system 1 according to the first embodiment includes a compressor 105 that compresses refrigerant by driving an electric motor (compressor side electric motor 150 corresponds to this), and circulates the refrigerant to create an air conditioning target space ( A first air conditioner 100 that conditions the air in the indoor space 21), and a second air conditioner (ventilation fan 200) that conditions the air in the air conditioned space and is different from the first air conditioner 100. is applicable), a power supply unit 1002 that supplies power to an electric motor, and a connection switching unit 1003 that switches a connection state between the electric motor and the power supply unit 1002. A first step in which the first air conditioner 100 reduces the voltage or frequency of the power supplied to the electric motor (step S100 applies), and a second step in which the first air conditioner 100 transmits a connection switching start signal (step S200 applies). , a third step (step S120 corresponds to this), which is performed after the first step and the second step are completed, and in which the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002; A fourth step (step S210 is applicable) is carried out after the completion of the second air conditioner, and the second air conditioner receives a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the ventilation capacity reduction signal). The configuration includes the following. In this configuration, before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the first air conditioner 100 transmits a connection switching start signal, and the second air conditioner 100 transmits a connection switching start signal. In order to receive the signal generated based on the start signal or the connection switching start signal, in the control method for the air conditioning system 1 according to the first embodiment, the first air conditioner 100 changes the connection state between the electric motor and the power supply unit 1002. The second air conditioner can be notified that the switching has started.

Furthermore, as an additional configuration, the control method for the air conditioning system 1 according to the first embodiment is implemented after the third step (step S120 corresponds) is completed, and the first air conditioner sends a connection switching end signal. a fifth step (step S220 is applicable) and a second air conditioner (corresponding to the ventilation fan 200), which is carried out after the fifth step is completed, based on the connection switching end signal or the connection switching end signal. It has a configuration including a sixth step (step S230 corresponds) of receiving the generated signal (corresponds to the ventilation capacity increase signal). With this additional configuration, the control method for the air conditioning system 1 according to the first embodiment allows the first air conditioner 100 to notify the second air conditioner that the switching of the connection state between the electric motor and the power supply section 1002 has been completed. can be transmitted to the device.

Furthermore, in the control method for the air conditioning system 1 according to the first embodiment, as an additional configuration, in the third step (step S120 is applicable), the connection switching unit 1003 is connected to the electric motor (compressor side electric motor 150 is applicable). and the connection state of the power supply unit 1002 is switched from a connection state in which the motor winding connection system is delta connection to a connection state in which the motor winding connection system is star connection, or the motor winding connection system is started. It has a configuration in which the connection state of the motor windings is switched from a wire connection state to a connection state where the connection method of the windings of the motor is delta connection. With this additional configuration, the control method for the air conditioning system 1 according to the first embodiment has the effect that the connection method of the windings of the electric motor can be selectively used between star connection and delta connection.

Furthermore, the control method for the air conditioning system 1 according to the first embodiment has an additional configuration that is performed after the fourth step (step S210 is applicable) is completed and the second air conditioner (ventilation fan 200 is applicable). A seventh step ( step S110). With this additional configuration, the control method for the air conditioning system 1 according to the first embodiment allows the air conditioning to be controlled even when the period when the electric motor is stopped or the period when the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing an increase in load.

Furthermore, in the control method of the air conditioning system 1 according to the first embodiment, as an additional configuration, the second air conditioner is configured to separate the air in the air conditioning target space (indoor space 21 is applicable) and the air conditioning target space. It is a ventilation device (corresponding to the ventilation fan 200) that exchanges air with air from a different space (corresponding to the outdoor space 22), and in the seventh step (corresponding to step S110), the ventilation device changes the ventilation capacity to the fourth step (step S210 corresponds to applicable) has a configuration that changes the ventilation capacity to a lower value than the ventilation capacity before it was implemented. With this additional configuration, the control method for the air conditioning system 1 according to Embodiment 1 can control the period when the electric motor is stopped or the rotational speed of the electric motor is reduced when the second air conditioner is a ventilation device. This has the effect of suppressing an increase in the load on air conditioning even if the air conditioning is prolonged for a long time.

Furthermore, the control method for the air conditioning system 1 according to the first embodiment is implemented after the sixth step (step S230 is applicable) as an additional configuration, and the ventilation of the ventilation device (the ventilation fan 200 is applicable) is performed. It has a configuration including an eighth step (step S140 is applicable) of changing the ventilation capacity to the ventilation capacity before implementing the seventh step (step S110 is applicable). With the additional configuration, the air conditioning system 1 according to the first embodiment has the effect of suppressing a significant decrease in the amount of ventilation.

Further, the air conditioner according to the first embodiment (first air conditioner 100 corresponds to this) includes a compressor 105 that compresses refrigerant by driving an electric motor (corresponds to the compressor side electric motor 150), and a compressor 105 that compresses refrigerant by driving an electric motor (corresponds to the compressor side electric motor 150), and a It is equipped with a power supply device 106 that supplies power, a connection switching device 107 that switches the connection state between the electric motor and the power supply device 106, and a communication device 109d that transmits a signal, and circulates the refrigerant compressed by the compressor 105 to generate air. The power supply device 106 adjusts the voltage of the power to be supplied to the motor or The communication device 109d is configured to reduce the frequency and transmit a connection switching start signal. In this configuration, the communication device 109d transmits a connection switching start signal before the connection switching device 107 switches the connection state between the electric motor and the power supply device 106, so the air conditioner according to the first embodiment It is possible to notify other devices that the connection state of the supply device 106 is being switched.

Furthermore, the air conditioner according to the first embodiment (first air conditioner 100 corresponds to this) has an electric motor (corresponds to the compressor side electric motor 150) by a connection switching device 107 and a power supply device 106 as an additional configuration. After the switching of the connection state is completed, the communication device 109d is configured to transmit a connection switching completion signal. With this additional configuration, the air conditioner according to the first embodiment can notify other devices that the switching of the connection state between the electric motor and the power supply device 106 has been completed.

Furthermore, in the air conditioner according to the first embodiment (first air conditioner 100 applies), as an additional configuration, the connection switching device 107 connects the electric motor (compressor side electric motor 150 applies) and the power supply device. Switch the connection state of 106 from a connection state in which the motor windings are connected in a delta connection to a connection state in which the motor windings are connected in a star connection, or change the connection state in which the motor windings are connected in a star connection to the connection state in which the motor windings are connected in a star connection. The windings are connected in a delta connection. With this additional configuration, the air conditioner according to the first embodiment has the effect that the connection method of the windings of the motor can be selectively used between star connection and delta connection.

A modification of the first embodiment will be described.

In the air conditioning system 1 according to the first embodiment, the first air conditioner 100 transmits a connection switching start signal to the management device 300, and the management device 300 that receives the connection switching start signal sends a ventilation capacity reduction signal to the ventilation fan 200. Send. Further, the first air conditioner 100 transmits a connection switching end signal to the management device 300, and the management device 300, which has received the connection switching end signal, transmits a ventilation capacity increase signal to the ventilation fan 200. However, the air conditioning system 1 of the present disclosure is not limited to these. For example, the air conditioning system may have a configuration in which the first air conditioner directly transmits the connection switching start signal and the connection switching end signal to the ventilation fan, and does not include the management device 300.

However, if the management device 300 is not provided, at least one of the first air conditioner or the ventilation fan needs to be a dedicated product that is associated with the other. For example, if a general-purpose ventilation fan is used, a first air conditioner that is a dedicated product is used that generates a connection switching start signal that includes information that controls the general-purpose ventilation fan so as to reduce the ventilation capacity of the general-purpose ventilation fan. There is a need. In addition, when a general-purpose air conditioner is used as the first air conditioner, the ventilation capacity is reduced when a connection switching start signal containing information about starting to switch the connection state transmitted from the first general-purpose air conditioner is received. It is necessary to use a special ventilation fan.

The air conditioning system 1 according to the first embodiment can communicate with the first air conditioner 100 and the second air conditioner (corresponding to the ventilation fan 200) as an additional configuration, and the first air conditioner 100 can communicate with the second air conditioner (corresponding to the ventilation fan 200). 100 and a management means (corresponding to the management device 300) for managing the second air conditioner, the management means receives the connection switching start signal, and generates a signal based on the connection switching start signal (the ventilation capacity decrease signal corresponds). and transmits the signal generated based on the connection switching start signal to the second air conditioner. With this additional configuration, the air conditioning system 1 of the first embodiment has the advantage of being able to use a general-purpose first air conditioner and a general-purpose second air conditioner.

Further, in the control method for the air conditioning system 1 according to the first embodiment, as an additional configuration, the air conditioning system 1 communicates with the first air conditioner 100 and the second air conditioner (including the ventilation fan 200). It is possible to have a management means (the management device 300 is applicable) for managing the first air conditioner 100 and the second air conditioner, and the management means is implemented between the second step and the fourth step. A ninth step of receiving the connection switching start signal, generating a signal (corresponding to the ventilation capacity reduction signal) based on the connection switching start signal, and transmitting the signal generated based on the connection switching start signal to the second air conditioner. (corresponding to steps S200 and S210). With this additional configuration, the control method for the air conditioning system 1 of the first embodiment has the effect that the general-purpose first air conditioner and the general-purpose second air conditioner can be used in the air conditioning system. play.

Although the management device 300 of the air conditioning system 1 according to the first embodiment is a device that manages a plurality of devices, the present invention is not limited thereto. In place of the management device 300, for example, a management means that performs management-related processing on an external server or a cloud server that can communicate with the first air conditioner and the second air conditioner via an external network such as the Internet. It doesn't matter if there is.

In the connection switching process, the air conditioning system 1 according to the first embodiment switches the power to the compressor-side motor 150 in step S100 before switching the connection state between the compressor-side motor 150 and the power supply unit 1002 in step S120. Although supply has been suspended, this is not limited to. It is sufficient to simply reduce the voltage or frequency of the power supplied to the compressor-side motor before switching the connection state between the compressor-side motor and the power supply section. In this case, although there is a possibility that arc discharge will occur when switching the connection state between the compressor side electric motor 150 and the power supply unit 1002, it is possible to avoid reducing the voltage or frequency of the electric power supplied to the compressor side electric motor. Compared to the case where the connection state between the compressor side electric motor 150 and the power supply unit 1002 is switched, the scale of arc discharge can be reduced. Furthermore, by reducing the scale of arc discharge, it is possible to suppress the occurrence of problems caused by arc discharge.

Although the air conditioning system 1 according to the first embodiment uses the ventilation fan 200 as the second air conditioning device, the second air conditioning device is not limited to this, and any ventilation device that exchanges air in an indoor space with air in an outdoor space may be used. For example, it may be a heat exchange ventilation device that performs both air supply and exhaust, and performs heat exchange between the air in an outdoor space to be supplied and the air in an indoor space to exhaust. Alternatively, it may be a range hood fan installed in a kitchen for the purpose of exhausting smoke. Furthermore, it may be a bathroom ventilation device installed in a bathroom.

Embodiment 2.
Next, an air conditioning system 1a according to a second embodiment will be described. The air conditioning system 1a according to the second embodiment differs from the air conditioning system 1 according to the first embodiment in that it includes a timer section 1007 and the content of the connection switching process. Note that the air conditioning system 1a according to the second embodiment is almost the same as the air conditioning system 1 according to the first embodiment except for the timer unit 1007 and the content of the connection switching process, so a description thereof will be omitted. Omitted.

FIG. 11 is a block diagram showing the functional configuration of the air conditioning system according to the second embodiment. The functional configuration of the air conditioning system 1a will be explained.

The air conditioning system 1a includes a first air conditioner control section 1001, a power supply section 1002, a connection switching section 1003, a management section 1004, a ventilation control section 1005, a ventilation section 1006, and a timer section 1007. .

The timer unit 1007 measures the elapsed time t and determines whether the elapsed time t has exceeded a predetermined set time t1. The timer section 1007 is realized by a timer (not shown) included in at least the outdoor unit control device 108, the indoor unit control device 109, the ventilation fan control device 203, or the management device 300. Further, it is assumed that the set time t1 is set by the designer of the air conditioning system 1a and is stored in any of the auxiliary storage devices 108c, 109c, 203c, and 300c.

The ventilation control section 1005 controls the ventilation section 1006 based on the judgment of the timer section 1007. Details of the control will be described later.

FIG. 12 is a flowchart showing connection switching processing of the air conditioning system according to the second embodiment. FIG. 13 is a sequence diagram showing connection switching processing of the air conditioning system according to the second embodiment. Next, the connection switching process of the air conditioning system 1a will be explained. Note that the conditions under which the connection switching process is performed in the air conditioning system 1a are the same as the conditions under which the connection switching process described in the first embodiment is performed.

First, the process flow in the connection switching process of the air conditioning system 1a will be described with reference to FIG. 12. Here, the premise for starting the flowchart in FIG. 12 and the processing from step S100 to step S130 are almost the same as the premise for starting the flowchart in FIG. 9 and the processing from step S100 to step S130 described in the first embodiment. Therefore, the explanation will be omitted.

After completing the process in step S130, the process advances to step S131. In step S131, the ventilation control unit 1005 controls the ventilation unit 1006 to increase the ventilation capacity to a ventilation capacity higher than the ventilation capacity before performing the process in step S110. Specifically, when the ventilation fan side electric motor 202 is an AC motor, in step S131 the ventilation control unit 1005 sets the voltage or frequency of the AC power supplied to the ventilation fan side electric motor 202 to the voltage before performing the process in step S110. Alternatively, control is performed so that the frequency is higher than the frequency. Further, when the ventilation fan side electric motor 202 is a DC motor, in step S131 the ventilation control unit 1005 sets the voltage of the DC power supplied to the ventilation fan side electric motor 202 to be higher than the voltage before performing the process of step S110. control.

After completing the process in step S131, the process advances to step S132. In step S132, the timer unit 1007 resets the elapsed time t and starts measuring the elapsed time t anew.

After completing the process in step S132, the process advances to step S133. In step S133, the timer unit 1007 compares the elapsed time t with a predetermined set time t1 and determines whether the elapsed time t has exceeded the set time t1. That is, in step S133, the timer unit 1007 determines whether the condition T≧t1 is satisfied.

In step S133, if the timer unit 1007 determines that the elapsed time t has not exceeded the set time t1 (step S133, NO), the process of step S133 is performed again.

In step S133, if the timer unit 1007 determines that the elapsed time t has exceeded the preset time t1 (step S133, YES), the process advances to step S140.

In step S140, as in the first embodiment, ventilation control unit 1005 controls ventilation unit 1006 to return the ventilation capacity to the ventilation capacity before performing the process in step S110. After completing the process in step S140, the air conditioning system 1a ends the connection switching process.

Next, communication in connection switching processing of the air conditioning system 1a will be described with reference to FIG. 13. Here, the processing from step S200 to step S230 is almost the same as the processing from step S200 to step S230 in the sequence of FIG. 10 described in the first embodiment, and therefore the description thereof will be omitted. That is, the timing of communication and each process of the first air conditioner 100 is similar to the timing of communication and each process of the first air conditioner 100 shown in the first embodiment. Furthermore, the timing of communication and each process of the management device 300 is the same as the timing of communication and each process of the management device 300 shown in the first embodiment.

After the ventilation fan 200 receives the ventilation capacity increase signal in step S230, the process of step S131 in FIG. 12 is performed.

After the process in step S131 is completed, the ventilation fan 200 waits for at least the set time t1 with the ventilation capacity set at the ventilation capacity set in step S131 (step S240). Step S240 corresponds to the period in which the processes of step S132 and step S133 in FIG. 12 are being performed.

After the standby time in step S240 ends, the process in step S140 in FIG. 12 is performed in the ventilation fan 200.

As described above, the configuration of the air conditioning system 1a according to the second embodiment includes a compressor 105 that compresses refrigerant by driving an electric motor (compressor side electric motor 150 corresponds to this), and circulates the refrigerant to create an air conditioning target space. A first air conditioner 100 that conditions the air in the indoor space 21 (applicable to the indoor space 21), and a second air conditioner (ventilation fan) that conditions the air in the air conditioned space and is a device different from the first air conditioner 100 200 corresponds to), a power supply section 1002 that supplies power to the electric motor, and a connection switching section 1003 that switches the connection state between the motor and the power supply section 1002. Before switching the connection state, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the motor, the first air conditioner 100 transmits a connection switch start signal, and the second air conditioner switches the connection. It is configured to receive a signal (corresponding to a ventilation capacity reduction signal) generated based on a start signal or a connection switching start signal. With this configuration, the air conditioning system 1a according to the second embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the air conditioning system 1a according to the second embodiment, as an additional configuration, the ventilation device (corresponding to the ventilation fan 200) receives a connection switching end signal or a signal generated based on the connection switching end signal (ventilation capacity increase). signal) is received, the ventilation capacity is changed to a ventilation capacity higher than the ventilation capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal (the ventilation capacity reduction signal is applicable). Has a configuration to change. With this additional configuration, the air conditioning system 1a according to the second embodiment is operated at the increased ventilation capacity after the connection switching process is completed to increase the ventilation amount, and is operated at the reduced ventilation capacity at the time of the connection switching process. This has the effect of compensating for the insufficient amount of ventilation during ventilation.

In particular, the amount of ventilation per unit time of ventilation equipment may be specified by law. For example, the Building Standards Act of Japan stipulates the number of ventilations that a ventilation system must meet. The ventilation frequency is the ventilation capacity per hour based on the volume of the indoor space. For example, if the ventilation frequency is 0.5 times/h, half the amount of air in the indoor space will be replaced in one hour. Refers to ability. Since the volume of indoor space is predetermined, the amount of ventilation per hour of ventilation equipment is determined by law. Generally, the ventilation rate of a ventilation system is often set to be approximately the same as the ventilation rate stipulated by law in order to reduce the load on air conditioning. In such a case, if the ventilation capacity is reduced during the connection switching process, the amount of ventilation per unit time will decrease, and there is a possibility that the amount of ventilation stipulated by law will not be met. However, with this configuration, it is possible to compensate for the reduced ventilation volume during the wiring switching process by increasing the ventilation capacity and increasing the ventilation volume after the wiring switching process is completed, and even if the ventilation capacity is reduced during the wiring switching process, the can meet the ventilation volume stipulated by

Furthermore, in the air conditioning system 1a according to the second embodiment, as an additional configuration, the ventilation device (corresponding to the ventilation fan 200) receives a connection switching end signal or a signal generated based on the connection switching end signal (ventilation capacity increase). After a preset time has elapsed since the ventilation capacity was changed by receiving the corresponding signal), the ventilation capacity is changed to the connection switching start signal or the signal generated based on the connection switching start signal (ventilation capacity reduction signal is Applicable) have the configuration to change the ventilation capacity before receiving. With the additional configuration, the air conditioning system 1a according to the second embodiment suppresses unnecessary ventilation and has the effect of being able to reduce the air conditioning load.

Further, in the control method of the air conditioning system 1a according to the second embodiment, similar to the control method of the air conditioning system 1 according to the first embodiment, the refrigerant is compressed by driving an electric motor (the compressor side electric motor 150 corresponds to the control method). A first air conditioner 100 has a compressor 105 that circulates a refrigerant to condition the air in a space to be air conditioned (indoor space 21 is applicable); A second air conditioner (corresponding to the ventilation fan 200) that is a device different from the conditioner 100, a power supply section 1002 that supplies power to the electric motor, and a connection switching section 1003 that switches the connection state between the electric motor and the power supply section 1002. This is a control method for an air conditioning system 1, which includes a first step (step S100 corresponds to this) of reducing the voltage or frequency of the power that the power supply unit 1002 supplies to the electric motor; A second step (corresponding to step S200) of transmitting a connection switching start signal is performed after the first step and the second step are completed, and the connection switching unit 1003 changes the connection state between the motor and the power supply unit 1002. A third step of switching (step S120 is applicable) and a signal (ventilation capacity decrease This configuration includes a fourth step (step S210 is applicable) of receiving a signal (corresponding to the signal). With this configuration, the method for controlling the air conditioning system 1a according to the second embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, the control method for the air conditioning system 1a according to the second embodiment has an additional configuration that is performed after the sixth step (step S230 is applicable) and the ventilation device (the ventilation fan 200 is applicable) has a ventilation capacity. This configuration includes a tenth step (step S131 corresponds to) of changing the ventilation capacity to a higher ventilation capacity than the ventilation capacity before implementing the seventh step (step S110 corresponds). With the additional configuration, the control method for the air conditioning system 1a according to the second embodiment increases the ventilation amount that is insufficient during operation with the ventilation capacity reduced at the time of the connection switching process after the connection switching process is completed. This effect can be compensated for by increasing the amount of ventilation by operating the ventilator at a higher ventilation capacity.

Furthermore, in the control method for the air conditioning system 1a according to the second embodiment, as an additional configuration, the ventilation device ( The eleventh step (corresponding to step S140) is configured to change the ventilation capacity of the ventilation fan 200 (corresponding to the ventilation fan 200) to the ventilation capacity before the seventh step (corresponding to step S110). With the additional configuration, the method for controlling the air conditioning system 1a according to the second embodiment has the effect of suppressing unnecessary ventilation and reducing the air conditioning load.

Furthermore, since the configuration of the air conditioning system 1a and the configuration of the control method for the air conditioning system 1a according to the second embodiment include the additional configuration described in the first embodiment, The air conditioning system 1a and the method of controlling the air conditioning system 1a each have effects associated with the additional configuration described in the first embodiment.

A modification of the second embodiment will be described.

In the air conditioning system 1a according to the second embodiment, the set time t1 is set by the designer of the air conditioning system 1a, but the setting time t1 is not limited to this, and can be set by the constructor of the air conditioning system, the user of the air conditioning system, or the air conditioning system. Each component may set the set time t1. For example, the ventilation control unit uses a timer unit to measure the time during which the ventilation capacity is being reduced, and the ventilation capacity reduction signal is determined from the measured time during which the ventilation capacity is being reduced and the ventilation capacity before receiving the ventilation capacity reduction signal. Calculated based on the difference obtained by subtracting the decreased ventilation capacity after receiving the ventilation capacity increase signal, and the difference obtained by subtracting the ventilation capacity before receiving the ventilation capacity decrease signal from the increased ventilation capacity after receiving the ventilation capacity increase signal. You can also set it. Specifically, since ventilation volume is calculated as the product of ventilation capacity and time, the measured time for reducing ventilation capacity and the ventilation capacity after receiving the ventilation capacity reduction signal are greater than the ventilation capacity before receiving the ventilation capacity reduction signal. The product of the difference obtained by subtracting the decreased ventilation capacity from the set time t1 and the difference obtained by subtracting the ventilation capacity before receiving the ventilation capacity decrease signal from the increased ventilation capacity after receiving the ventilation capacity increase signal and the setting time t1 The ventilation control unit may calculate and set the set time t1 such that the values are equal.

Embodiment 3.
Next, an air conditioning system 1b according to Embodiment 3 will be described. The air conditioning system 1b according to the third embodiment differs from the air conditioning system 1 according to the first embodiment in that it includes a temperature measuring section 1008 and in the content of the wiring process. Note that the air conditioning system 1b according to the third embodiment is substantially the same as the air conditioning system 1 according to the first embodiment, except for the provision of the temperature measurement unit 1008 and the content of the connection switching process, and therefore will not be described. omitted.

FIG. 14 is a block diagram showing the functional configuration of the air conditioning system according to the third embodiment. The functional configuration of the air conditioning system 1b will be explained.

The air conditioning system 1b includes a first air conditioner control section 1001, a power supply section 1002, a connection switching section 1003, a management section 1004, a ventilation control section 1005, a ventilation section 1006, and a temperature measurement section 1008. have

The temperature measurement unit 1008 measures the temperature of the air in the indoor space 21 . The temperature measurement unit 1008 is realized by a temperature sensor such as a thermistor (not shown) included in a device communicably connected to the first air conditioner 100 or the management device 300.

The first air conditioner control unit 1001 controls the power supply unit 1002 based on the temperature of the air in the indoor space 21 measured by the temperature measurement unit 1008. Details of the control will be described later.

FIG. 15 is a flowchart showing connection switching processing of the air conditioning system according to the third embodiment. FIG. 16 is a sequence diagram showing connection switching processing of the air conditioning system according to the third embodiment. Next, the connection switching process of the air conditioning system 1b will be explained. Note that the conditions under which the connection switching process in the third embodiment is performed are the same as the conditions under which the connection switching process described in the first embodiment is performed.

First, the process flow in the connection switching process of the air conditioning system 1b will be described with reference to FIG. Here, the premise for starting the flowchart in FIG. 15 is almost the same as the premise for starting the flowchart in FIG. 9 described in Embodiment 1, so the explanation will be omitted.

When the air conditioning system 1b starts the connection switching process, it first performs the process of step S90. In step S90, the temperature measurement unit 1008 measures the temperature of the air in the indoor space 21 at the time of step S90. The temperature of the air in the indoor space 21 measured in step S90 is referred to as the pre-connection switching temperature T0. The pre-connection switching temperature T0 is stored in either the main storage device 108b, 109b, 203b, 300b or the auxiliary storage device 108c, 109c, 203c, 300c.

After completing the process in step S90, the process advances to step S100. Here, the processing from step S100 to step S120 is almost the same as the processing from step S100 to step S120 described in Embodiment 1, so a description thereof will be omitted.

After completing the process in step S120, the process advances to step S135. In step S135, the first air conditioner control unit 1001 controls the power supply unit 1002 to restart the supply of power to the compressor side electric motor 150 and increase the frequency of the electric power supplied to the compressor side electric motor 150. Specifically, in step S135, the first air conditioner control unit 1001 turns on or off the first to sixth switching elements 164a to 164f of the inverter 164 so as to supply three-phase AC power to the compressor side electric motor 150. control. In addition, in step S135, the first air conditioner control unit 1001 changes the frequency of the three-phase AC power that was being supplied to the compressor-side electric motor 150 before stopping the power supply to the compressor-side electric motor 150 in step S100. It is also controlled to supply high frequency three-phase AC power. Therefore, by the process of step S135, the rotation speed of the compressor side electric motor 150 becomes higher than the rotation speed of the compressor side electric motor 150 before the supply of electric power to the compressor side electric motor 150 is stopped, and the first air conditioner The air conditioning capacity of 100 is greater than the air conditioning capacity before stopping the supply of electric power to the compressor side electric motor 150.

After completing the process in step S135, the process advances to step S140. The process in step S140 is the same as the process in step S140 in the first embodiment, so a description thereof will be omitted.

After completing the process in step S140, the process advances to step S150. In step S150, the temperature measurement unit 1008 measures the temperature of the air in the indoor space 21 at the time of step S150. Here, the temperature of the air in the indoor space 21 at the time of step S150 is referred to as the post-connection switching temperature T. The temperature T after connection switching is stored in either the main storage device 108b, 109b, 203b, 300b or the auxiliary storage device 108c, 109c, 203c, 300c.

After completing the process in step S150, the process advances to step S151. In step S151, the first air conditioner control unit 1001 determines whether the temperature T after connection switching is substantially the same as the temperature T0 before connection switching. That is, in step S151, the first air conditioner control unit 1001 determines whether the condition T≈T0 is satisfied. Here, satisfying the condition of T≒T0 refers to a case where the temperature T after wiring switching is within the temperature range set based on the temperature T0 before wiring switching, such as T0 ± 2°C. .

In step S151, if the first air conditioner control unit 1001 determines that the condition T≈T0 is not satisfied (step S151, NO), the process of step S150 is performed again and the temperature measurement unit 1008 measures the temperature after switching the connection. Measure T.

In step S151, if the first air conditioner control unit 1001 determines that the condition T≈T0 is satisfied (step S151, YES), the process proceeds to step S152.

In step S152, the first air conditioner control unit 1001 controls the power supply unit 1002 to reduce the frequency of the power supplied to the compressor-side electric motor 150. Specifically, in step S152, the first air conditioner control unit 1001 turns on the first to sixth switching elements 164a to 164f of the inverter 164 so that the compressor side electric motor 150 reduces the frequency of the three-phase AC power. Or control off. Therefore, the rotation speed of the compressor side electric motor 150 is lower than the rotation speed immediately after the process of step S135 is completed, and the air conditioning capacity of the first air conditioner 100 is lower than the rotation speed of the compressor side electric motor 150 after the process of step S135 is completed. lower than the ability. Furthermore, in step S135 of the air conditioning system 1b according to the third embodiment, the first air conditioner control unit 1001 supplies power to the compressor side electric motor 150 before stopping the power supply to the compressor side electric motor 150 in step S100. Control is performed to supply three-phase AC power with the same frequency as the three-phase AC power that was being supplied. Therefore, by the process of step S135, the rotation speed of the compressor side electric motor 150 becomes the same as the rotation speed of the compressor side electric motor 150 before stopping the supply of electric power to the compressor side electric motor 150, and the first air conditioner The air conditioning capacity of 100 is the same as the air conditioning capacity before stopping the supply of electric power to the compressor side electric motor 150.

After completing the process in step S152, the air conditioning system 1b ends the connection switching process.

Next, communication in connection switching processing of the air conditioning system 1b will be described with reference to FIG. 16. Here, the processes of step S200, step S210, step S220, and step S230 are almost the same as the processes of step S200, step S210, step S220, and step S230 in the sequence of FIG. 10 described in the first embodiment, so The explanation will be omitted.

After the first air conditioner 100 transmits the connection switching start signal in step S200, the process of step S100, the process of step S120, and the process of step S135 in FIG. 15 are sequentially performed.

After completing the process in step S135, the first air conditioner 100 transmits a connection switching end signal to the management device 300 (step S220) and supplies power to the compressor side electric motor 150 until the condition T≈T0 is satisfied. Waits with the frequency set at step S135 (step S250). Step S250 corresponds to the period in which the processes of step S150 and step S151 in FIG. 15 are being performed.

After the standby period in step S250 ends, the process in step S152 in FIG. 15 is performed in the first air conditioner 100.

Note that the timing of communication and each process of the management device 300 is the same as the timing of communication and each process of the management device 300 shown in the first embodiment. Furthermore, the timing of communication and each process of the ventilation fan 200 is the same as that of the ventilation fan 200 and the timing of each process shown in the first embodiment.

As described above, the configuration of the air conditioning system 1b according to the third embodiment is similar to that of the air conditioning system 1 according to the first embodiment. A first air conditioner 100 that has an air conditioner 105 and circulates a refrigerant to condition the air in an air conditioning target space (indoor space 21 is applicable); and a first air conditioner that conditions the air in the air conditioner space. 100, a second air conditioner (corresponding to the ventilation fan 200), a power supply unit 1002 that supplies power to the electric motor, and a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002. In preparation, before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner 100 starts switching the connection. The second air conditioner is configured to transmit a signal, and receive a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the ventilation capacity reduction signal). With this configuration, the air conditioning system 1b according to the third embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, the air conditioning system 1b according to the third embodiment has an additional configuration, after the connection switching unit 1003 finishes switching the connection state between the electric motor (compressor side electric motor 150 corresponds to this) and the power supply unit 1002. The power supply unit 1002 has a configuration that supplies the motor with power having a frequency higher than the frequency of power before the connection state between the motor and the power supply unit 1002 is switched. With this additional configuration, the air conditioning system 1b according to Embodiment 3 is able to switch the electric motor after wiring switching is completed when the period when the electric motor is stopped or the period during which the rotational speed of the electric motor is reduced becomes long. This has the effect of being able to eliminate the air conditioning load increased at the time of connection switching more quickly than when the frequency of the supplied power is the same as the frequency of the power supplied to the electric motor before the connection is switched. Further, with the additional configuration, the air conditioning system 1b according to the third embodiment has the effect of suppressing the user's comfort from being impaired for a long time.

Furthermore, the air conditioning system 1b according to the third embodiment includes a temperature measurement unit 1008 that measures the temperature of the air in the air conditioning target space (indoor space 21 is applicable) as an additional configuration. The connection state between the electric motor (compressor-side electric motor 150 is applicable) and the power supply unit 1002 is switched to the temperature T0 before connection switching, which is the temperature of the air-conditioned space before switching the connection state between the electric motor (compressor-side electric motor 150 applies) and the power supply unit 1002. The power supply unit 1002 measures the temperature T after connection switching, which is the temperature of the subsequent air conditioning target space, and if the temperature T after connection switching falls within the temperature range set based on the temperature T0 before connection switching, the power supply unit 1002 It has a configuration in which the frequency of power supplied to the motor is changed to the frequency before switching the connection state between the motor and the power supply unit 1002. With this additional configuration, the air conditioning system 1b according to the third embodiment can maintain power supply to the electric motor even when the temperature T after connection switching falls within the temperature range set based on the temperature T0 before connection switching. Compared to the case where power of a frequency higher than the frequency before the switching of the wiring state of the section 1002 is supplied to the electric motor, energy saving is achieved.

Further, in the control method of the air conditioning system 1b according to the third embodiment, the refrigerant is compressed by driving the electric motor (compressor side electric motor 150 corresponds to this), similar to the control method of the air conditioning system 1 according to the first embodiment. A first air conditioner 100 has a compressor 105 that circulates a refrigerant to condition the air in a space to be air conditioned (indoor space 21 is applicable); A second air conditioner (corresponding to the ventilation fan 200) that is a device different from the conditioner 100, a power supply section 1002 that supplies power to the electric motor, and a connection switching section 1003 that switches the connection state between the electric motor and the power supply section 1002. This is a control method for an air conditioning system 1, which includes a first step (step S100 corresponds to this) of reducing the voltage or frequency of the power that the power supply unit 1002 supplies to the electric motor; A second step (corresponding to step S200) of transmitting a connection switching start signal is performed after the first step and the second step are completed, and the connection switching unit 1003 changes the connection state between the motor and the power supply unit 1002. A third step of switching (step S120 is applicable) and a signal (ventilation capacity decrease This configuration includes a fourth step (step S210 is applicable) of receiving a signal (corresponding to the signal). With this configuration, the method for controlling the air conditioning system 1b according to the third embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, the control method for the air conditioning system 1b according to the third embodiment is implemented after the third step (step S120 is applicable) as an additional configuration, and the power supply unit 1002 is executed in the first step (step S100). The present invention has a configuration including a twelfth step (step S135 is applicable) of supplying power of a frequency higher than the frequency of the electric power supplied to the electric motor to the electric motor before performing (applicable to). With this additional configuration, the control method for the air conditioning system 1b according to the third embodiment is able to control the air conditioning system 1b after the wiring connection is switched, when the period when the motor is stopped or the period during which the rotational speed of the motor is reduced becomes long. It is possible to eliminate the air conditioning load increased at the time of connection switching more quickly than when the frequency of the power supplied to the electric motor is the same as the frequency of the power supplied to the motor before the connection change. be effective

Furthermore, in the control method for the air conditioning system 1b according to the third embodiment, as an additional configuration, the air conditioning system includes a temperature measurement unit 1008 that measures the temperature of the air in the air conditioning target space (indoor space 21 corresponds to). In preparation, the temperature measurement unit 1008 measures the pre-connection switching temperature T0, which is the temperature of the air-conditioned space before the first step (step S100 applies). The temperature of the air-conditioned space after the thirteenth step (step S90 is applicable) and the twelfth step (step S135 is applicable) is completed and the third step (step S120 is applicable) is completed. A fourteenth step (step S150) in which the temperature measurement unit 1008 measures the temperature T after connection switching, which is A fifteenth step (step S152 corresponds to this) of changing the frequency of the power that the power supply unit 1002 supplies to the motor to the frequency before the first step is performed. With this additional configuration, the control method for the air conditioning system 1b according to the third embodiment is able to control the air conditioning system 1b even if the temperature T after connection switching falls within the temperature range set based on the temperature T0 before connection switching. Compared to the case where power of a higher frequency is supplied to the electric motor than before the first step is performed, energy can be saved.

Further, like the air conditioner according to Embodiment 1, the air conditioner according to the third embodiment (corresponding to the first air conditioner 100) is driven by an electric motor (corresponding to the compressor side electric motor 150). It includes a compressor 105 that compresses refrigerant, a power supply device 106 that supplies power to the electric motor, a connection switching device 107 that switches the connection state between the electric motor and the power supply device 106, and a communication device 109d that transmits signals. , before the refrigerant compressed by the compressor 105 is circulated to condition the air in the air-conditioned space (indoor space 21 is applicable), and the connection switching device 107 switches the connection state between the electric motor and the power supply device 106. The power supply device 106 is configured to reduce the voltage or frequency of power supplied to the motor, and the communication device 109d is configured to transmit a connection switching start signal. With this configuration, the air conditioner according to the third embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, the air conditioner according to the third embodiment (first air conditioner 100 corresponds to this) has an electric motor (corresponds to compressor side electric motor 150) by a connection switching device 107 and a power supply device 106 as an additional configuration. After the switching of the connection state between the electric motor and the power supply device 106 is completed, the power supply device 106 is configured to supply the motor with power having a frequency higher than the frequency of the power before the connection state of the motor and the power supply device 106 is switched. With this additional configuration, the air conditioner according to Embodiment 3 can supply power to the motor after wiring switching is completed, even if the period during which the motor is stopped or the period during which the rotational speed of the motor is reduced becomes long. This has the effect that the air conditioning load increased at the time of connection switching can be eliminated more quickly than when the frequency of the power supplied to the motor is lower than the frequency of the power supplied to the motor before the connection is switched. Moreover, with the additional configuration, the air conditioner according to the third embodiment has the effect of suppressing the user's comfort from being impaired for a long time.

Furthermore, the air conditioner according to the third embodiment (the first air conditioner 100 corresponds to this) has an additional configuration in which the air conditioning target space (indoor The post-connection switching temperature T, which is the temperature of the air in the space 21 (corresponding to space 21), is set based on the pre-connection switching temperature T0, which is the temperature of the air conditioning target space before switching the connection state of the power supply device 106. If the width falls within the range, the power supply device 106 has a configuration that changes the frequency of the power supplied to the electric motor (compressor side electric motor 150 applies) to the frequency before switching the connection state between the electric motor and the power supply unit 1002. have With this additional configuration, the air conditioner according to Embodiment 3 can operate the electric motor and the power supply unit even when the temperature T after connection switching falls within the temperature range set based on the temperature T0 before connection switching. Compared to the case where the motor is supplied with power of a higher frequency than the frequency before switching the connection state in step 1002, energy saving is achieved.

Further, since the air conditioning system 1b, the control method for the air conditioning system 1b, and the configuration of the air conditioner according to the third embodiment include the additional configurations described in the first embodiment, the third embodiment The air conditioning system 1b, the control method for the air conditioning system 1b, and the air conditioner each have effects associated with the additional configurations described in the first embodiment.

A modification of the third embodiment will be described.

In the air conditioning system 1b according to the third embodiment, after the process in step S135 is completed, the first air conditioner 100 changes the frequency of the power supplied to the compressor side electric motor 150 in step S135 until the condition T≈T0 is satisfied. Waits at the frequency set in , but is not limited to this. For example, the first air conditioner 100 is checked in advance by checking the time that approximately satisfies the condition of T≒T0, and is equipped with a timer section instead of the temperature measuring section, and the first air conditioner 100 is checked in the test after completing the process in step S135. The frequency of the electric power supplied to the compressor-side electric motor 150 may be kept at the frequency set in step S135 until the time elapses until the condition T≈T0 is satisfied. In this case, in the flowchart of FIG. 15, the process of step S90 is eliminated, and instead of the processes of step S150 and step S151, the processes of step S132 and step S133 explained in the second embodiment are added, so that the condition T≈T0 is satisfied. The time becomes the set time t1.

Further, the air conditioning system 1b, the control method for the air conditioning system 1b, or the first air conditioner 100 according to the third embodiment may be applied to the air conditioning system or air conditioner described in the modification of the first embodiment or the second embodiment. A control method of a conditioning system or a configuration of an air conditioner may be applied.

Embodiment 4.
Next, an air conditioning system 1c according to Embodiment 4 will be explained. The air conditioning system 1c according to the fourth embodiment differs from the air conditioning system 1 according to the first embodiment in that it includes a timer section 1007 and a temperature measurement section 1008, and in the content of the connection switching process. Note that the air conditioning system 1c according to the fourth embodiment has almost the same configuration as the air conditioning system 1 according to the first embodiment, except that it includes a timer section 1007 and a temperature measurement section 1008, and the content of the connection switching process. Therefore, the explanation will be omitted.

FIG. 17 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 4. The functional configuration of the air conditioning system 1c will be explained.

The air conditioning system 1c includes a first air conditioner control section 1001, a power supply section 1002, a connection switching section 1003, a management section 1004, a ventilation control section 1005, a ventilation section 1006, a timer section 1007, It has a temperature measuring section 1008. Timer section 1007 has the same configuration as described in Embodiment 2, and temperature measurement section 1008 has the same configuration as described in Embodiment 3, so a description thereof will be omitted.

FIG. 18 is a flowchart showing connection switching processing of the air conditioning system according to the fourth embodiment. FIG. 19 is a flowchart showing ventilation fan side processing of the air conditioning system according to the fourth embodiment. FIG. 20 is a flowchart showing the first air conditioner side processing of the air conditioning system according to the fourth embodiment. FIG. 21 is a sequence diagram showing connection switching processing of the air conditioning system according to the fourth embodiment. Next, the connection switching process of the air conditioning system 1c will be explained. Note that the conditions under which the connection switching process in the fourth embodiment is performed are the same as the conditions under which the connection switching process described in the first embodiment is performed.

First, the process flow in the connection switching process of the air conditioning system 1c will be described with reference to FIG. Here, the premise for starting the flowchart in FIG. 18 is the same as the premise for starting the flowchart in FIG. 9 described in Embodiment 1, so a description thereof will be omitted.

When the air conditioning system 1b starts the connection switching process, it first performs the process of step S90. In step S90, the temperature measurement unit 1008 measures the temperature of the air in the indoor space 21 at the time of step S90. The details of the process in step S90 are the same as the process in step S190 described in the third embodiment, so the description will be omitted.

After completing the process in step S90, the process advances to step S100. Here, the processing from step S100 to step S120 is almost the same as the processing from step S100 to step S120 described in Embodiment 1, so a description thereof will be omitted.

After completing the process in step S120, the process advances to step S135. In step S135, the first air conditioner control unit 1001 controls the power supply unit 1002 to restart the supply of power to the compressor side electric motor 150 and increase the frequency of the electric power supplied to the compressor side electric motor 150. The details of the process in step S135 are the same as the process in step S135 described in the third embodiment, so the explanation will be omitted.

After completing the process in step S135, the process advances to step S131. In step S131, the ventilation control unit 1005 controls the ventilation unit 1006 to increase the ventilation capacity to a ventilation capacity higher than the ventilation capacity before performing the process in step S110. The details of the process in step S131 are the same as the process in step S131 described in the second embodiment, so the explanation will be omitted.

After completing the process in step S131, the process advances to step S132. In step S132, the timer unit 1007 resets the elapsed time t and starts measuring the elapsed time t anew.

After completing the process in step S132, the air conditioning system 1c performs the processes in step S170 and step S180 in parallel.

In step S170, the air conditioning system 1c performs a first air conditioner side process. Specifically, as shown in FIG. 19, when the first air conditioner side process starts, the process advances to step S171.

In step S171, the temperature measuring unit 1008 measures the temperature of the air in the indoor space 21 at the time of step S171. The details of the process in step S171 are the same as the process in step S150 described in the third embodiment, so the description will be omitted.

After completing the process in step S171, the process advances to step S172. In step S172, the first air conditioner control unit 1001 determines whether the condition T≈T0 is satisfied. The details of the process in step S171 are the same as the process in step S138 described in the third embodiment, so the explanation will be omitted.

In step S172, if the first air conditioner control unit 1001 determines that the condition T≒T0 is not satisfied (step S172, NO), the process of step S171 is performed again, and the temperature measuring unit 1008 measures the temperature after switching the connection. Measure T.

In step S172, if the first air conditioner control unit 1001 determines that the condition T≈T0 is satisfied (step S172, YES), the process proceeds to step S173. In step S173, the first air conditioner control unit 1001 controls the power supply unit 1002 to reduce the frequency of the power supplied to the compressor-side electric motor 150. The details of the process in step S173 are the same as the process in step S152 described in the third embodiment, so the explanation will be omitted.

After completing the process in step S173, the air conditioning system 1c ends the first air conditioner side process.

In step S180, the air conditioning system 1c performs ventilation fan side processing. Specifically, as shown in FIG. 20, when the ventilation fan side process starts, the process proceeds to step S181.

In step S181, the timer unit 1007 compares the elapsed time t with a predetermined set time t1 and determines whether the elapsed time t has exceeded the set time t1. That is, in step S181, the timer unit 1007 determines whether the condition T≧t1 is satisfied.

In step S181, if the timer unit 1007 determines that the elapsed time t has not exceeded the set time t1 (step S181, NO), the process of step S181 is performed again.

In step S181, if the timer unit 1007 determines that the elapsed time t has exceeded the set time t1 (step S181, YES), the process advances to step S182. In step S182, the ventilation control unit 1005 controls the ventilation unit 1006 to return the ventilation capacity to the ventilation capacity before performing the process in step S110. After completing the process in step S182, the air conditioning system 1c ends the ventilation fan side process.

When both the first air conditioner side process in step S170 and the ventilation fan side process in step S180 are completed, the air conditioning system 1c ends the connection switching process.

Next, communication in connection switching processing of the air conditioning system 1c will be described with reference to FIG. 21. The timing of the communication and each process of the first air conditioner 100 is the same as the communication and the timing of each process of the first air conditioner 100 shown in the third embodiment. Furthermore, the timing of communication and each process of the management device 300 is the same as the timing of communication and each process of the management device 300 shown in the first embodiment. Furthermore, the timing of communication and each process of the ventilation fan 200 is the same as that of the ventilation fan 200 and the timing of each process shown in the second embodiment.

As described above, the configuration of the air conditioning system 1c according to the fourth embodiment is similar to the air conditioning system 1 according to the first embodiment, in which the refrigerant is compressed by driving the electric motor (compressor side electric motor 150 corresponds to this). A first air conditioner 100 that has a compressor 105 and circulates a refrigerant to condition the air in a space to be air conditioned (indoor space 21 is applicable), and a first air conditioner to condition the air in the space to be air conditioned A second air conditioner (corresponding to the ventilation fan 200) that is a device different from the device 100, a power supply unit 1002 that supplies power to the electric motor, a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002, Before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner 100 switches the connection. The second air conditioner is configured to transmit a start signal, and receive a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the ventilation capacity reduction signal). With this configuration, the air conditioning system 1c according to the fourth embodiment can obtain the same effects as those described in the first embodiment.

Further, in the control method of the air conditioning system 1c according to the fourth embodiment, similar to the control method of the air conditioning system 1 according to the first embodiment, the refrigerant is compressed by driving an electric motor (compressor side electric motor 150 corresponds to this). A first air conditioner 100 has a compressor 105 that circulates a refrigerant to condition the air in a space to be air conditioned (indoor space 21 is applicable); A second air conditioner (corresponding to the ventilation fan 200) that is a device different from the conditioner 100, a power supply section 1002 that supplies power to the electric motor, and a connection switching section 1003 that switches the connection state between the electric motor and the power supply section 1002. This is a control method for an air conditioning system 1, which includes a first step (step S100 corresponds to this) of reducing the voltage or frequency of the power that the power supply unit 1002 supplies to the electric motor; A second step (corresponding to step S200) of transmitting a connection switching start signal is performed after the first step and the second step are completed, and the connection switching unit 1003 changes the connection state between the motor and the power supply unit 1002. A third step of switching (step S120 is applicable) and a signal (ventilation capacity decrease This configuration includes a fourth step (step S210 is applicable) of receiving a signal (corresponding to the signal). With this configuration, the method for controlling the air conditioning system 1c according to the fourth embodiment can obtain the same effects as those described in the first embodiment.

Further, like the air conditioner according to Embodiment 1, the air conditioner according to the fourth embodiment (corresponding to the first air conditioner 100) is driven by an electric motor (corresponding to the compressor side electric motor 150). It includes a compressor 105 that compresses refrigerant, a power supply device 106 that supplies power to the electric motor, a connection switching device 107 that switches the connection state between the electric motor and the power supply device 106, and a communication device 109d that transmits signals. , before the refrigerant compressed by the compressor 105 is circulated to condition the air in the air-conditioned space (indoor space 21 is applicable), and the connection switching device 107 switches the connection state between the electric motor and the power supply device 106. The power supply device 106 is configured to reduce the voltage or frequency of power supplied to the motor, and the communication device 109d is configured to transmit a connection switching start signal. With this configuration, the air conditioner according to the fourth embodiment can obtain the same effects as those described in the first embodiment.

In addition, the air conditioning system 1c, the control method of the air conditioning system 1c, and the configuration of the air conditioning apparatus according to the fourth embodiment are the same as those described in the first, second, and third embodiments. Since these configurations are provided, the effects associated with the additional configurations described in Embodiment 1, Embodiment 2, and Embodiment 3 are achieved.

A modification of the fourth embodiment will be described.

In the air conditioning system 1c of the fourth embodiment, the temperature measurement unit 1008 measures the temperature T0 before connection switching and the temperature T after connection switching, and the first air conditioner control unit 1001 performs compression when the condition T≒T0 is satisfied. Although the power supply unit 1002 is controlled to reduce the frequency of the power supplied to the machine-side electric motor 150, the present invention is not limited thereto. For example, when the timer unit compares the elapsed time t and a predetermined set time t2 as in step S181 and determines that the elapsed time t has passed the set time t2, the first air conditioner control unit 1001 The power supply unit 1002 may be controlled to reduce the frequency of the power supplied to the machine-side electric motor 150.

Further, the air conditioning system 1c, the control method for the air conditioning system 1c, or the first air conditioner 100 according to the fourth embodiment may be the air conditioning system or air conditioning system described in the first embodiment, the second embodiment, or the third embodiment. The control method of 1c or the configuration of the modified example of the air conditioner may be applied.

Embodiment 5.
Next, an air conditioning system 1d according to Embodiment 5 will be described. The air conditioning system 1d according to the second embodiment differs from the air conditioning system 1 according to the first embodiment in that it includes a cooling device 400 as a second air conditioner and in the content of the connection switching process. . Note that the air conditioning system 1d according to the fifth embodiment has the same configuration as the air conditioning system 1 according to the first embodiment except that it includes the cooling device 400 as the second air conditioner and the content of the connection switching process. Since it is almost the same as , the explanation will be omitted.

FIG. 22 is a schematic diagram of an air conditioning system according to Embodiment 5. The cooling device 400 cools the air in the indoor space 21 . In the present disclosure, cooling includes not only cooling the air but also blowing air to cool the user. The state of the air in the indoor space 21 is changed by cooling, and the cooling is performed intentionally, so the cooling device 400 corresponds to an air conditioner. The cooling device 400 may be, for example, an air conditioner, a cooler, or a fan that uses a refrigerant circuit having the same configuration as the first air conditioner.

The cooling device 400 also includes a cooling control device 401 that controls the cooling capacity of the cooling device 400. Here, the cooling capacity refers to the amount of cooling air in the indoor space 21 per unit time, which is a certain predetermined period of time, that the cooling device 400 exerts, or the amount of air blown into the indoor space 21 to cool the room. refers to something. Although not shown, the cooling control device 401 also includes a processor, a main storage device, an auxiliary storage device, a communication device, and a bus that connects these devices so that they can communicate with each other.

Furthermore, in the fifth embodiment, the management device 300 is communicably connected to the indoor unit control device 109 and the cooling control device 401, and manages at least the first air conditioner 100 and the cooling device 400.

FIG. 23 is a block diagram showing the functional configuration of an air conditioning system according to the fifth embodiment. The air conditioning system 1d includes a cooling device control section 1009 and a cooling section 1010.

The cooling device control unit 1009 controls the cooling device 400. In the fifth embodiment, the cooling device control section 1009 controls at least the cooling section 1010. The cooling device control unit 1009 is realized by the processor of the cooling control device 401 executing various processes according to programs stored in the auxiliary storage device.

The cooling unit 1010 cools the air in the indoor space 21 . The cooling unit 1010 is realized by a device constituting a refrigerant circuit that cools the air, or a fan and electric motor that blows air to cool the body.

FIG. 24 is a flowchart showing connection switching processing of the air conditioning system according to the fifth embodiment. FIG. 25 is a sequence diagram showing connection switching processing of the air conditioning system according to the fifth embodiment. Next, the connection switching process of the air conditioning system 1d will be explained. Note that the conditions under which the connection switching process is performed are the same as those under which the connection switching process described in Embodiment 1 is performed, except that the following conditions are added. The connection switching process according to the fifth embodiment is performed on the condition that the first air conditioner 100 is operating in the cooling operation mode.

First, the flow of the connection switching process will be described with reference to FIG. 24. Here, the premise of the conditions for starting the flowchart in FIG. 24 is the same as the conditions for starting the flowchart in FIG. 9 described in Embodiment 1, so the explanation will be omitted.

When the air conditioning system 1d starts the connection switching process, the process first proceeds to step S300. In step S300, similarly to step S100 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to stop supplying power to compressor-side electric motor 150.

After completing the process in step S300, the process advances to step S310. In step S310, the cooling device control unit 1009 controls the cooling unit 1010 to increase the cooling capacity. For example, the cooling unit 1010 is controlled to increase the amount of air cooled in the indoor space 21 or to increase the amount of air blown into the indoor space 21 to cool the room.

After completing the process in step S310, the process advances to step S320. In step S320, similarly to step S120 described in the first embodiment, the first air conditioner control unit 1001 controls the connection switching unit 1003 to switch the connection state between the compressor side electric motor 150 and the power supply unit 1002. .

After completing the process in step S320, the process advances to step S330. In step S330, similarly to step S130 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to restart the supply of power to compressor-side electric motor 150.

After completing the process in step S330, the process advances to step S340. In step S340, the cooling device control unit 1009 controls the cooling unit 1010 to return the cooling capacity to the cooling capacity before performing the process in step S310. For example, the amount of cooling of the air in the indoor space 21 may be returned to the amount of cooling before performing the process of step S310, or the amount of air blown into the indoor space 21 that is blown to cool the room may be changed to the amount of cooling before performing the process of step S310. The cooling unit 1010 is controlled to return to the air volume.

After completing the process in step S340, the air conditioning system 1d ends the connection switching process.

Here, the reason for increasing the cooling capacity in the connection switching process will be explained. In the air conditioning system 1d, the supply of power to the compressor-side electric motor 150 is stopped during the connection switching process, so the first air conditioner 100 is stopped during the connection switching process. When the first air conditioner 100 is stopped for a long time, the temperature of the air in the indoor space 21 increases due to heat generation sources inside the indoor space 21, increasing the air conditioning load on the first air conditioner 100. The amount becomes large and the user's comfort is impaired. In the air conditioning system 1d, in order to increase the cooling capacity of the cooling device 400 in the connection switching process, the cooling capacity in the connection switching process is the same as the cooling capacity before the connection switching process. The amount of increase in the air conditioning load of one air conditioner 100 is reduced, and the loss of user comfort is suppressed.

Next, communication in connection switching processing of the air conditioning system 1d will be described with reference to FIG. 25.

First, as in the first embodiment, the first air conditioner 100 transmits a connection switching start signal to the management device 300 (step S200).

After receiving the connection switching start signal in step S200, the management device 300 transmits a cooling capacity increase signal to the cooling device 400 (step S211). The cooling capacity increase signal is a signal generated by the management device 300 based on the connection switching start signal, and is a signal that includes information for controlling the cooling device 400 to increase the cooling capacity of the cooling device 400. Further, in the fifth embodiment, the cooling capacity increase signal is transmitted to the cooling control device 401.

After the cooling device 400 receives the cooling capacity increase signal in step S211, the process of step S310 in FIG. 24 is performed.

Further, after the first air conditioner 100 transmits the connection switching start signal in step S200, the process of step S300, the process of step S320, and the process of step S330 in FIG. 24 are sequentially performed.

After completing the process in step S330, the first air conditioner 100 transmits a connection switching end signal to the management device 300 (step S220), as in the first embodiment.

After receiving the connection switching end signal in step S220, the management device 300 transmits a cooling capacity reduction signal to the cooling device 400 (step S231). The cooling capacity reduction signal is a signal generated by the management device 300 based on the connection switching end signal, and is a signal that reduces the cooling capacity of the cooling apparatus 400 to return the cooling capacity to the cooling capacity before receiving the cooling capacity increase signal. This is a signal containing information to control the system. Further, in the fifth embodiment, the cooling capacity reduction signal is transmitted to the cooling control device 401.

After the cooling device 400 receives the cooling capacity reduction signal in step S231, the process of step S340 in FIG. 24 is performed.

As described above, the configuration of the air conditioning system 1d according to the fifth embodiment is similar to the air conditioning system 1 according to the first embodiment. A first air conditioner 100 that has an air conditioner 105 and circulates a refrigerant to condition the air in an air conditioning target space (indoor space 21 is applicable); and a first air conditioner that conditions the air in the air conditioner space. 100, a second air conditioner (corresponding to the cooling device 400), a power supply unit 1002 that supplies power to the electric motor, a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002, Before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner 100 switches the connection. The second air conditioner is configured to transmit a start signal, and receive a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the cooling capacity increase signal). With this configuration, the air conditioning system 1d according to the fifth embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the air conditioning system 1d according to the fifth embodiment, as an additional configuration, the first air conditioning device 100 cools the air in the air conditioning target space (indoor space 21 corresponds), and the second air conditioning device 100 cools the air in the air conditioning target space (corresponding to the indoor space 21). The device is a cooling device 400 that cools the air in an air conditioning target space, and when the cooling device 400 receives a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the cooling capacity increase signal). The cooling capacity is changed to a cooling capacity higher than the cooling capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. With the additional configuration, the air conditioning system 1d according to the fifth embodiment can increase the air conditioning load even when the period when the motor is stopped or the period when the rotational speed of the motor is reduced becomes long. This has the effect of suppressing the loss of user comfort.

Further, in the control method of the air conditioning system 1d according to the fifth embodiment, similar to the control method of the air conditioning system 1 according to the first embodiment, the refrigerant is compressed by driving the electric motor (the compressor side electric motor 150 corresponds to the control method). A first air conditioner 100 has a compressor 105 that circulates a refrigerant to condition the air in a space to be air conditioned (indoor space 21 is applicable); A second air conditioner (corresponding to the cooling device 400) which is a device different from the conditioner 100, a power supply unit 1002 that supplies power to the electric motor, and a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002. A first step (step S300 corresponds) of reducing the voltage or frequency of the electric power supplied to the electric motor by the power supply unit 1002, and the first air conditioner 100. is carried out after the first step and the second step are completed, and the connection switching unit 1003 changes the connection state between the motor and the power supply unit 1002. A third step of switching (step S320 is applicable) and a signal (cooling capacity increase This configuration includes a fourth step (step S211 is applicable) of receiving a signal (corresponding to the signal). With this configuration, the method for controlling the air conditioning system 1d according to the fifth embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the control method of the air conditioning system 1d according to the fifth embodiment, as an additional configuration, the first air conditioner 100 cools the air in the air conditioning target space (indoor space 21 corresponds), and the second The air conditioner is a cooling device 400 that cools the air in the space to be air conditioned, and in the seventh step, the cooling device 400 changes the cooling capacity to the cooling capacity before the fourth step (step S211 corresponds) is performed. It has a configuration that changes the cooling capacity to a higher one than the cooling capacity. With this additional configuration, the control method for the air conditioning system 1d according to the fifth embodiment allows the air conditioning to be controlled even when the period when the electric motor is stopped or the period when the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing the loss of user comfort due to an increase in load.

Embodiment 6.
Next, an air conditioning system 1e according to Embodiment 6 will be described. The air conditioning system 1e according to Embodiment 6 differs from the air conditioning system 1 according to Embodiment 1 in that it includes a heating device 500 as a second air conditioner and in the content of the connection switching process. . Note that the air conditioning system 1e according to the sixth embodiment has the same configuration as the air conditioning system 1 according to the first embodiment except that it includes a heating device 500 as a second air conditioner and the content of the connection switching process. Since it is almost the same as , the explanation will be omitted.

FIG. 26 is a schematic diagram of an air conditioning system according to Embodiment 6. The heating device 500 heats the air in the indoor space 21. In the present disclosure, heating refers to heating air. Since heating changes the state of the air in indoor space 21 and heating is performed intentionally, heating device 500 corresponds to an air conditioner. Examples of the heating device 500 include an air conditioner using a refrigerant circuit having the same configuration as the first air conditioner, a fan heater, an electric stove, or a bathroom dryer.

The heating device 500 also includes a heating control device 501 that controls the heating capacity of the heating device 500. Here, the heating capacity refers to the amount of heating of the air in the indoor space 21 per unit time, which is a certain predetermined period of time, that the heating device 500 exerts. Although not shown, the heating control device 501 also includes a processor, a main storage device, an auxiliary storage device, a communication device, and a bus that connects these devices so that they can communicate with each other.

Furthermore, in the sixth embodiment, the management device 300 is communicably connected to the indoor unit control device 109 and the heating control device 501, and manages at least the first air conditioner 100 and the heating device 500.

FIG. 27 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 6. The air conditioning system 1e includes a heating device control section 1011 and a heating section 1012.

The heating device control unit 1011 controls the heating device 500. In the sixth embodiment, heating device control section 1011 controls at least heating section 1012. The heating device control unit 1011 is realized by the processor of the heating control device 501 executing various processes according to programs stored in the auxiliary storage device.

The heating unit 1012 heats the air in the indoor space 21. The heating unit 1012 is realized by a device that forms a refrigerant circuit that heats air, a device that burns kerosene or gas, or an electric heater.

FIG. 28 is a flowchart showing connection switching processing of the air conditioning system according to the sixth embodiment. FIG. 29 is a sequence diagram showing connection switching processing of the air conditioning system according to the sixth embodiment. Next, the connection switching process of the air conditioning system 1e will be explained. Note that the conditions under which the connection switching process is performed are the same as those under which the connection switching process described in Embodiment 1 is performed, except that the following conditions are added. The connection switching process according to the sixth embodiment is performed on the condition that the first air conditioner 100 is operating in the heating operation mode.

First, the flow of the connection switching process will be described with reference to FIG. 28. Here, the premise of the conditions for starting the flowchart in FIG. 28 is the same as the conditions for starting the flowchart in FIG. 9 described in Embodiment 1, so a description thereof will be omitted.

When the air conditioning system 1e starts the connection switching process, the process first proceeds to step S400. In step S400, like step S100 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to stop supplying power to compressor-side electric motor 150.

After completing the process in step S400, the process advances to step S410. In step S410, the heating device control unit 1011 controls the heating unit 1012 to increase the heating capacity. For example, the heating unit 1012 is controlled to increase the amount of heating of the air in the indoor space 21.

After completing the process in step S410, the process advances to step S420. In step S420, similarly to step S120 described in the first embodiment, the first air conditioner control unit 1001 controls the connection switching unit 1003 to switch the connection state between the compressor side electric motor 150 and the power supply unit 1002. .

After completing the process in step S420, the process advances to step S430. In step S430, similar to step S130 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to resume supplying power to compressor-side electric motor 150.

After completing the process in step S430, the process advances to step S440. In step S440, the heating device control unit 1011 controls the heating unit 1012 to return the heating capacity to the heating capacity before performing the process in step S410. For example, the heating unit 1012 is controlled to return the amount of heating of the air in the indoor space 21 to the amount of heating before performing the process in step S410.

After completing the process in step S440, the air conditioning system 1e ends the connection switching process.

Here, the reason why the heating capacity is increased in the connection switching process will be explained. In the air conditioning system 1e, the supply of power to the compressor-side electric motor 150 is stopped during the connection switching process, so the first air conditioner 100 is stopped during the connection switching process. When the first air conditioner 100 is stopped for a long time, the temperature of the indoor space 21 decreases due to drafts, etc., and the increase in the air conditioning load of the first air conditioner 100 becomes large. Comfort is impaired. In the air conditioning system 1e, in order to increase the heating capacity of the heating device 500 in the connection switching process, the heating capacity in the connection switching process is the same as the heating capacity before the connection switching process. The amount of increase in the air conditioning load of one air conditioner 100 is reduced, and the loss of user comfort is suppressed.

Next, communication in connection switching processing of the air conditioning system 1e will be described with reference to FIG. 29.

First, as in the first embodiment, the first air conditioner 100 transmits a connection switching start signal to the management device 300 (step S200).

After receiving the connection switching start signal in step S200, the management device 300 transmits a heating capacity increase signal to the heating device 500 (step S212). The heating capacity increase signal is a signal generated by the management device 300 based on the connection switching start signal, and is a signal containing information for controlling the heating apparatus 500 to increase the heating capacity of the heating apparatus 500. Further, in the sixth embodiment, the heating capacity increase signal is transmitted to the heating control device 501.

After heating device 500 receives the heating capacity increase signal in step S212, the process of step S410 in FIG. 28 is performed.

Further, after the first air conditioner 100 transmits the connection switching start signal in step S200, the process of step S400, the process of step S420, and the process of step S430 in FIG. 28 are sequentially performed.

After completing the process in step S430, the first air conditioner 100 transmits a connection switching end signal to the management device 300 (step S220), as in the first embodiment.

After receiving the connection switching end signal in step S220, the management device 300 transmits a heating capacity reduction signal to the heating device 500 (step S232). The heating capacity reduction signal is a signal generated by the management device 300 based on the connection switching end signal, and is a signal that reduces the heating capacity of the heating apparatus 500 to return the heating capacity to the cooling capacity before receiving the heating capacity increase signal. This is a signal containing information to control the system. Further, in the sixth embodiment, the heating capacity reduction signal is transmitted to the heating control device 501.

After heating device 500 receives the heating capacity reduction signal in step S232, the process of step S440 in FIG. 28 is performed.

As described above, the configuration of the air conditioning system 1e according to the sixth embodiment is similar to that of the air conditioning system 1 according to the first embodiment. A first air conditioner 100 that has an air conditioner 105 and circulates a refrigerant to condition the air in an air conditioning target space (indoor space 21 is applicable); and a first air conditioner that conditions the air in the air conditioner space. 100, a second air conditioner (corresponding to the heating device 500), a power supply unit 1002 that supplies power to the electric motor, a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002, Before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner 100 switches the connection. The second air conditioner is configured to transmit a start signal, and receive a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the heating capacity increase signal). With this configuration, the air conditioning system 1e according to the sixth embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the air conditioning system 1e according to the sixth embodiment, as an additional configuration, the first air conditioning device 100 heats the air in the air conditioning target space (indoor space 21 corresponds), and the second air conditioning device 100 heats the air in the air conditioning target space (indoor space 21 corresponds). The device is a heating device 500 that heats the air in an air conditioning target space, and when the heating device 500 receives a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the heating capacity increase signal). The heating capacity is changed to a heating capacity higher than the heating capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. With this additional configuration, the air conditioning system 1e according to the sixth embodiment can increase the air conditioning load even when the period when the electric motor is stopped or the period when the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing the loss of user comfort.

Further, the control method for the air conditioning system 1e according to the sixth embodiment is similar to the control method for the air conditioning system 1 according to the first embodiment. A first air conditioner 100 that has a compressor 105 and circulates refrigerant to condition the air in the air conditioning target space (indoor space 21 is applicable); A second air conditioner (corresponding to the heating device 500) that is a device different from the air conditioner 100, a power supply unit 1002 that supplies power to the electric motor, and a connection switching unit that switches the connection state between the electric motor and the power supply unit 1002. 1003, a first step (step S400 corresponds) of reducing the voltage or frequency of the power supplied to the electric motor by the power supply unit 1002, and a first air conditioner. 100 transmits a connection switching start signal (step S200 is applicable); and the connection switching unit 1003 is executed after the first step and the second step are completed, and the connection switching unit 1003 changes the connection state between the motor and the power supply unit 1002. A third step (step S420 corresponds to this) and a signal (heating capacity This configuration includes a fourth step (step S212 is applicable) of receiving a rising signal (corresponding to the rising signal). With this configuration, the method for controlling the air conditioning system 1e according to the sixth embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the control method for the air conditioning system 1e according to the sixth embodiment, as an additional configuration, the first air conditioner 100 heats the air in the air conditioning target space (indoor space 21 corresponds), and the second The air conditioner is a heating device 500 that heats the air in the space to be air conditioned, and in the seventh step, the heating device 500 increases the heating capacity to a heating capacity higher than the heating capacity before the fourth step is performed. It has a configuration that changes to . With this additional configuration, the control method for the air conditioning system 1e according to the sixth embodiment allows the air conditioning to be controlled even when the period when the electric motor is stopped or the period when the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing the loss of user comfort due to an increase in load.

Embodiment 7.
Next, an air conditioning system 1f according to Embodiment 7 will be described. The air conditioning system 1f according to the seventh embodiment is different from the air conditioning system 1 according to the first embodiment in that the first air conditioner 100 has a dehumidifying operation mode as an operation mode, and the second air conditioner 100 has a dehumidifying operation mode as an operation mode. The difference is that a dehumidifying device 600 is provided as a harmonizing device, and the content of the connection switching process is different. Note that the air conditioning system 1f according to the seventh embodiment has the following points: the first air conditioner 100 has a dehumidifying operation mode as an operation mode, the dehumidifier 600 is provided as the second air conditioner, and the connection switching process The other configurations except for the contents are almost the same as the air conditioning system 1 according to the first embodiment, so the explanation will be omitted.

FIG. 30 is a schematic diagram of an air conditioning system according to Embodiment 7. The first air conditioner 100 has a dehumidifying operation mode in which moisture contained in the air in the indoor space 21 is removed. The flow of refrigerant when the first air conditioner 100 is in the dehumidifying operation mode is the same as the flow of refrigerant when it is in the cooling operation mode. Therefore, the indoor unit heat exchanger 113 functions as an evaporator, and the air in the indoor space 21 is cooled by the refrigerant passing through the flow path inside the indoor unit heat exchanger 113. As the air in the indoor space 21 is cooled, part of the moisture contained in the air in the indoor space 21 adheres to the indoor unit heat exchanger 113 as condensation and is removed from the air in the indoor space 21.

The dehumidifier 600 dehumidifies the air in the indoor space 21. In the present disclosure, dehumidification refers to removing moisture contained in the air. The state of the air in the indoor space 21 is changed by dehumidification, and dehumidification is performed intentionally, so the dehumidification device 600 corresponds to an air conditioner. Examples of the dehumidifier 600 include a dehumidifier using a refrigerant circuit that has the same configuration as the first air conditioner, and a desiccant type dehumidifier that absorbs moisture in the air using a dehumidifying rotor containing a moisture absorbent. This applies to utensils, etc.

Further, the dehumidifying device 600 includes a dehumidifying control device 601 that controls the dehumidifying ability of the dehumidifying device 600. Here, the dehumidifying capacity refers to the amount of moisture in the air in the indoor space 21 that can be removed by the dehumidifying device 600 per unit time, which is a certain predetermined period of time. Although not shown, the dehumidification control device 601 also includes a processor, a main storage device, an auxiliary storage device, a communication device, and a bus that connects these devices so that they can communicate with each other.

Furthermore, in the seventh embodiment, the management device 300 is communicably connected to the indoor unit control device 109 and the dehumidification control device 601, and manages at least the first air conditioner 100 and the dehumidification device 600.

FIG. 31 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 7. The air conditioning system 1f includes a dehumidifier control section 1013 and a dehumidification section 1014.

The dehumidifier control unit 1013 controls the dehumidifier 600. In the seventh embodiment, dehumidifier control section 1013 controls at least dehumidification section 1014. The dehumidification device control unit 1013 is realized by the processor of the dehumidification control device 601 executing various processes according to programs stored in the auxiliary storage device.

The dehumidifier 1014 dehumidifies the air in the indoor space 21 . The dehumidifying unit 1014 is realized by a device constituting a refrigerant circuit that performs dehumidification, an electric motor that rotates a desiccant rotor, or a heater that dries the desiccant rotor.

FIG. 32 is a flowchart showing connection switching processing of the air conditioning system according to the seventh embodiment. FIG. 33 is a sequence diagram showing connection switching processing of the air conditioning system according to the seventh embodiment. Next, the connection switching process of the air conditioning system 1f will be explained. Note that the conditions under which the connection switching process is performed are the same as those under which the connection switching process described in Embodiment 1 is performed, except that the following conditions are added. The connection switching process according to the seventh embodiment is performed on the condition that the first air conditioner 100 is operating in the dehumidifying operation mode.

First, the flow of the connection switching process will be described with reference to FIG. 32. Here, the premise of the conditions for starting the flowchart in FIG. 32 is the same as the conditions for starting the flowchart in FIG. 9 described in Embodiment 1, so the explanation will be omitted.

When the air conditioning system 1f starts the connection switching process, the process first proceeds to step S500. In step S500, like step S100 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to stop supplying power to compressor-side electric motor 150.

After completing the process in step S500, the process advances to step S510. In step S510, the dehumidifying device control unit 1013 controls the dehumidifying unit 1014 to increase the dehumidifying capacity. For example, the dehumidifier 1014 is controlled to increase the amount of moisture removed from the air in the indoor space 21.

After completing the process in step S510, the process advances to step S520. In step S520, similarly to step S120 described in the first embodiment, the first air conditioner control unit 1001 controls the connection switching unit 1003 to switch the connection state between the compressor side electric motor 150 and the power supply unit 1002. .

After completing the process in step S520, the process advances to step S530. In step S530, similarly to step S130 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to resume supplying power to compressor-side electric motor 150.

After completing the process in step S530, the process advances to step S540. In step S540, the dehumidifying device control unit 1013 controls the dehumidifying unit 1014 to return the dehumidifying capacity to the dehumidifying capacity before performing the process in step S510. For example, the dehumidifier 1014 is controlled to return the amount of moisture removed from the air in the indoor space 21 to the amount of moisture before performing the process in step S510.

After completing the process in step S540, the air conditioning system 1f ends the connection switching process.

Here, the reason why the dehumidification capacity is increased in the connection switching process will be explained. In the air conditioning system 1f, the supply of power to the compressor-side electric motor 150 is stopped during the connection switching process, so the first air conditioner 100 is stopped during the connection switching process. When the first air conditioner 100 is stopped for a long time, the humidity in the indoor space 21 increases due to moisture emitted by the user, and the increase in the air conditioning load on the first air conditioner 100 becomes large. User comfort is impaired. In the air conditioning system 1f, in order to increase the dehumidification capacity of the dehumidifier 600 in the connection switching process, the dehumidification capacity in the connection switching process is the same as the dehumidification capacity before the connection switching process, compared to the case where heating is continued. The amount of increase in the air conditioning load of one air conditioner 100 is reduced, and the loss of user comfort is suppressed.

Next, communication in connection switching processing of the air conditioning system 1f will be described with reference to FIG. 33.

First, as in the first embodiment, the first air conditioner 100 transmits a connection switching start signal to the management device 300 (step S200).

After receiving the connection switching start signal in step S200, the management device 300 transmits a dehumidification capacity increase signal to the dehumidification device 600 (step S213). The dehumidification capacity increase signal is a signal generated by the management device 300 based on the connection switching start signal, and is a signal that includes information for controlling the dehumidification device 600 to increase the dehumidification capacity of the dehumidification device 600. Further, in the seventh embodiment, the dehumidification capacity increase signal is transmitted to the dehumidification control device 601.

After the dehumidifying device 600 receives the dehumidifying capacity increase signal in step S212, the process of step S510 in FIG. 32 is performed.

Moreover, after the first air conditioner 100 transmits the connection switching start signal in step S200, the process of step S500, the process of step S520, and the process of step S530 in FIG. 32 are sequentially performed.

After completing the process in step S530, the first air conditioner 100 transmits a connection switching end signal to the management device 300 (step S220), as in the first embodiment.

After receiving the connection switching end signal in step S220, the management device 300 transmits a dehumidification capacity reduction signal to the dehumidification device 600 (step S233). The dehumidifying capacity reduction signal is a signal generated by the management device 300 based on the connection switching end signal, and is used to reduce the dehumidifying capacity of the dehumidifying device 600 and return it to the dehumidifying capacity before receiving the dehumidifying capacity increasing signal. This is a signal containing information to control the system. Further, in the seventh embodiment, the dehumidification ability reduction signal is transmitted to the dehumidification control device 601.

After the dehumidifying device 600 receives the dehumidifying ability reduction signal in step S233, the process of step S540 in FIG. 32 is performed.

As described above, the configuration of the air conditioning system 1f according to the seventh embodiment is similar to that of the air conditioning system 1 according to the first embodiment. A first air conditioner 100 that has an air conditioner 105 and circulates a refrigerant to condition the air in an air conditioning target space (indoor space 21 is applicable); and a first air conditioner that conditions the air in the air conditioner space. 100, a second air conditioner (corresponding to the dehumidifier 600), a power supply unit 1002 that supplies power to the electric motor, a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002, Before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner 100 switches the connection. The second air conditioner is configured to transmit a start signal, and receive a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the dehumidification capacity increase signal). With this configuration, the air conditioning system 1f according to the seventh embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the air conditioning system 1f according to the seventh embodiment, as an additional configuration, the first air conditioner 100 dehumidifies the air in the air conditioning target space (indoor space 21 corresponds), and dehumidifies the air in the second air conditioner 100. The conditioning device is a dehumidifying device 600 that dehumidifies the air in an air-conditioning target space, and the dehumidifying device 600 has received a connection switching start signal or a signal generated based on the connection switching start signal (the dehumidification ability increase signal is applicable). At this time, the dehumidification capacity is changed to a dehumidification capacity higher than the dehumidification capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. With the additional configuration, the air conditioning system 1f according to the seventh embodiment can increase the air conditioning load even when the period when the motor is stopped or the period when the rotational speed of the motor is reduced becomes long. This has the effect of suppressing the loss of user comfort.

Further, in the control method of the air conditioning system 1f according to the seventh embodiment, the refrigerant is compressed by driving the electric motor (the compressor side electric motor 150 corresponds to the control method), similar to the control method of the air conditioning system 1 according to the first embodiment. A first air conditioner 100 has a compressor 105 that circulates a refrigerant to condition the air in a space to be air conditioned (indoor space 21 is applicable); A second air conditioner (corresponding to the dehumidifier 600) that is different from the conditioner 100, a power supply unit 1002 that supplies power to the electric motor, and a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002. A first step (step S500 corresponds) of reducing the voltage or frequency of the electric power supplied to the electric motor by the power supply unit 1002, and the first air conditioner 100. is carried out after the first step and the second step are completed, and the connection switching unit 1003 changes the connection state between the motor and the power supply unit 1002. A third step of switching (step S520 is applicable) and a signal (dehumidifying capacity increase This configuration includes a fourth step (step S213) of receiving a corresponding signal). With this configuration, the method for controlling the air conditioning system 1f according to the seventh embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the control method for the air conditioning system 1f according to the seventh embodiment, as an additional configuration, the first air conditioner 100 dehumidifies the air in the air conditioning target space (corresponding to the indoor space 21); The second air conditioner is a dehumidifier 600 that dehumidifies the air in the air-conditioned space, and in the seventh step, the dehumidifier 600 has a dehumidifying capacity higher than the dehumidifying capacity before the fourth step. Has the ability to change configuration. With this additional configuration, the control method for the air conditioning system 1f according to the seventh embodiment allows the air conditioning to be controlled even when the period when the electric motor is stopped or the period during which the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing the loss of user comfort due to an increase in load.

Embodiment 8.
Next, an air conditioning system 1g according to Embodiment 8 will be described. The air conditioning system 1g according to the eighth embodiment is different from the air conditioning system 1 according to the first embodiment in that the first air conditioner 100 humidifies the air in the indoor space 21, and the second air conditioner 1g humidifies the air in the indoor space 21. The difference is that a humidifying device 700 is provided as an air conditioner, and the content of the connection switching process is different. The air conditioning system 1g according to Embodiment 8 has the following points: the first air conditioner 100 humidifies the air in the indoor space 21, the humidifier 700 is provided as the second air conditioner, and the connection switching. The other configurations except for the processing contents are almost the same as the air conditioning system 1 according to the first embodiment, so the explanation will be omitted.

FIG. 30 is a schematic diagram of an air conditioning system according to Embodiment 8. The first air conditioner 100 has a humidifying means (not shown). Examples of the humidifying means include a method in which a water tank and a humidifying rotor are provided in the indoor unit 102, the humidifying rotor is made to contain moisture in the water tank, and the air blown out from the indoor unit 102 into the indoor space 21 is humidified. Further, the humidifying means includes, for example, providing the outdoor unit 101 with a desiccant rotor, a heater, and a blower to form an air path between the outdoor unit 101 and the indoor unit 102, and causing the desiccant rotor to adsorb moisture in the air in the outdoor space 22. The desiccant rotor that has absorbed moisture is heated with a heater to release moisture from the desiccant rotor to create humidified air, and the humidified air is passed through the air path between the outdoor unit 101 and the indoor unit 102 by a blower to the indoor unit 102. One example is a method in which humidified air sent into the indoor unit 102 is mixed with air heated or cooled by the indoor unit heat exchanger 113 and the mixture is blown into the indoor space 21 . Since the first air conditioner 100 has a humidifying means, the first air conditioner 100 can humidify the air in the indoor space 21. Note that in the present disclosure, humidification refers to adding moisture to air.

The humidifier 700 humidifies the air in the indoor space 21 . Humidification changes the state of the air in the indoor space 21 and humidification is performed intentionally, so the humidification device 700 corresponds to an air conditioner. Examples of the humidifying device 700 include a device that humidifies water by vaporizing it, a device that humidifies water by spraying it into fine water droplets, and a device that heats water and turns it into steam for humidification.

Further, the humidifying device 700 includes a humidifying control device 701 that controls the humidifying ability of the humidifying device 700. Here, the humidifying capacity refers to the amount of moisture in the air in the indoor space 21 that the humidifying device 700 can supply per unit time, which is a predetermined period of time. Although not shown, the humidification control device 701 also includes a processor, a main storage device, an auxiliary storage device, a communication device, and a bus that connects these devices so that they can communicate with each other.

Furthermore, in the eighth embodiment, the management device 300 is communicably connected to the indoor unit control device 109 and the humidification control device 701, and manages at least the first air conditioner 100 and the humidification device 700.

FIG. 35 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 8. The air conditioning system 1g includes a humidifier control section 1015 and a humidification section 1016.

The humidifier control unit 1015 controls the humidifier 700. In Embodiment 8, humidifier control section 1015 controls at least humidification section 1016. The humidification device control unit 1015 is realized by the processor of the humidification control device 701 executing various processes according to programs stored in the auxiliary storage device.

The humidifier 1016 humidifies the air in the indoor space 21 . The humidifying unit 1016 is realized by a blower electric motor for vaporizing water, a sprayer for turning water into fine droplets, a heater for turning water into steam, or the like.

FIG. 36 is a flowchart diagram illustrating connection switching processing of the air conditioning system according to Embodiment 8. FIG. 37 is a sequence diagram showing connection switching processing of the air conditioning system according to the eighth embodiment. Next, the connection switching process of the air conditioning system 1g will be explained. Note that the conditions under which the connection switching process is performed are the same as those under which the connection switching process described in Embodiment 1 is performed, except that the following conditions are added. The connection switching process according to the eighth embodiment is performed on the condition that the first air conditioner 100 humidifies the indoor space 21 by the humidifying means.

First, the flow of the connection switching process will be described with reference to FIG. 36. Here, the premise of the conditions for starting the flowchart in FIG. 36 is the same as the conditions for starting the flowchart in FIG. 9 described in Embodiment 1, so the explanation will be omitted.

When the air conditioning system 1g starts the connection switching process, the process first proceeds to step S600. In step S600, like step S100 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to stop supplying power to compressor-side electric motor 150.

After completing the process in step S600, the process advances to step S610. In step S610, the humidifying device control unit 1015 controls the humidifying unit 1016 to increase the humidifying capacity. For example, the humidifier 1016 is controlled to increase the amount of moisture supplied to the air in the indoor space 21.

After completing the process in step S610, the process advances to step S620. In step S620, similarly to step S120 described in the first embodiment, the first air conditioner control unit 1001 controls the connection switching unit 1003 to switch the connection state between the compressor side electric motor 150 and the power supply unit 1002. .

After completing the process in step S620, the process advances to step S630. In step S630, similarly to step S130 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to resume supplying power to compressor-side electric motor 150.

After completing the process in step S630, the process advances to step S640. In step S640, the humidifying device control unit 1015 controls the humidifying unit 1016 to return the humidifying capacity to the humidifying capacity before performing the process in step S610. For example, the humidifier 1016 is controlled to return the amount of moisture supplied to the air in the indoor space 21 to the amount of moisture before performing the process in step S610.

After completing the process in step S640, the air conditioning system 1g ends the connection switching process.

Here, the reason why the dehumidification capacity is increased in the connection switching process will be explained. In the air conditioning system 1g, the supply of power to the compressor-side electric motor 150 is stopped during the connection switching process, so the first air conditioner 100 is stopped during the connection switching process. When the first air conditioner 100 is stopped for a long time, the humidity in the indoor space 21 decreases due to drafts, etc., and the increase in the air conditioning load on the first air conditioner 100 becomes large. Comfort is impaired. In the air conditioning system 1g, in order to increase the humidifying capacity of the humidifier 700 in the connection switching process, the humidifying capacity in the connection switching process is the same as the humidifying capacity before the connection switching process, compared to the case where heating is continued. The amount of increase in the air conditioning load of one air conditioner 100 is reduced, and the loss of user comfort is suppressed.

Next, communication in connection switching processing of the air conditioning system 1g will be described with reference to FIG. 37.

First, as in the first embodiment, the first air conditioner 100 transmits a connection switching start signal to the management device 300 (step S200).

After receiving the connection switching start signal in step S200, the management device 300 transmits a humidification capacity increase signal to the humidification device 700 (step S214). The humidifying ability increase signal is a signal generated by the management device 300 based on the connection switching start signal, and is a signal containing information for controlling the humidifying device 700 to increase the humidifying ability of the humidifying device 700. Further, in the eighth embodiment, the humidification capacity increase signal is transmitted to the humidification control device 701.

After the humidifying device 700 receives the humidifying ability increase signal in step S214, the process of step S610 in FIG. 36 is performed.

Further, after the first air conditioner 100 transmits the connection switching start signal in step S200, the process of step S600, the process of step S620, and the process of step S630 in FIG. 36 are sequentially performed.

After completing the process in step S630, the first air conditioner 100 transmits a connection switching end signal to the management device 300 (step S220), as in the first embodiment.

After receiving the connection switching end signal in step S220, the management device 300 transmits a humidification ability reduction signal to the humidification device 700 (step S234). The humidifying ability reduction signal is a signal generated by the management device 300 based on the connection switching end signal, and is a signal that reduces the dehumidifying ability of the humidifying device 700 and returns the humidifying ability to the humidifying ability before receiving the humidifying ability increasing signal. This is a signal containing information to control the system. Further, in the eighth embodiment, the humidification ability reduction signal is transmitted to the humidification control device 701.

After the humidifying device 700 receives the humidifying ability reduction signal in step S234, the process of step S640 in FIG. 36 is performed.

As described above, the configuration of the air conditioning system 1g according to the eighth embodiment is similar to that of the air conditioning system 1 according to the first embodiment. A first air conditioner 100 that has an air conditioner 105 and circulates a refrigerant to condition the air in an air conditioning target space (indoor space 21 is applicable); and a first air conditioner that conditions the air in the air conditioner space. 100, a second air conditioner (corresponding to the humidifier 700), a power supply unit 1002 that supplies power to the electric motor, a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002, Before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner 100 switches the connection. The second air conditioner is configured to transmit a start signal, and receive a connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the humidification capacity increase signal). With this configuration, the air conditioning system 1g according to the eighth embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the air conditioning system 1g according to the eighth embodiment, as an additional configuration, the first air conditioning device 100 dehumidifies the air in the air conditioning target space (indoor space 21 corresponds), and the second air conditioning device The device is a humidifier 700 that humidifies the air in an air-conditioned space, and when the humidifier 700 receives a connection switching start signal or a signal generated based on the connection switching start signal (the humidification capacity increase signal is applicable) In addition, the humidifying capacity is changed to a humidifying capacity higher than the humidifying capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. With the additional configuration, the air conditioning system 1g according to the eighth embodiment can increase the air conditioning load even if the period when the electric motor is stopped or the period when the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing the loss of user comfort.

Further, in the control method of the air conditioning system 1g according to the eighth embodiment, similar to the control method of the air conditioning system 1 according to the first embodiment, the refrigerant is compressed by driving the electric motor (the compressor side electric motor 150 corresponds to the control method). A first air conditioner 100 has a compressor 105 that circulates a refrigerant to condition the air in a space to be air conditioned (indoor space 21 is applicable); A second air conditioner (corresponding to the humidifier 700) which is a device different from the conditioner 100, a power supply unit 1002 that supplies power to the electric motor, and a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002. A first step (step S600 corresponds) of reducing the voltage or frequency of the electric power supplied to the electric motor by the power supply unit 1002, and the first air conditioner 100. is carried out after the first step and the second step are completed, and the connection switching unit 1003 changes the connection state between the motor and the power supply unit 1002. A third step of switching (step S620 is applicable) and a signal (humidifying capacity increase This configuration includes a fourth step (step S214) of receiving a corresponding signal). With this configuration, the method for controlling the air conditioning system 1g according to the eighth embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the control method for the air conditioning system 1g according to the eighth embodiment, as an additional configuration, the first air conditioner 100 humidifies the air in the air conditioning target space (corresponding to the indoor space 21). The second air conditioner is a humidifier 700 that humidifies the air in the air-conditioned space, and in the seventh step, the humidifier 700 increases the humidification capacity to a level higher than the humidification capacity before the fourth step. Has the ability to change configuration. With this additional configuration, the control method for the air conditioning system 1g according to the eighth embodiment allows the air conditioning to be controlled even when the period when the electric motor is stopped or the period during which the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing the loss of user comfort due to an increase in load.

Embodiment 9.
Next, an air conditioning system 1h according to a ninth embodiment will be described. The air conditioning system 1h according to the ninth embodiment is different from the air conditioning system 1 according to the first embodiment in that the first air conditioner 100 supplies ions to the air in the indoor space 21, and the first air conditioner 100 supplies ions to the air in the indoor space 21. The difference is that an ion generator 800 is provided as the second air conditioner, and the content of the connection switching process is different. Note that the air conditioning system 1h according to the ninth embodiment has two points: the first air conditioner 100 supplies ions to the air in the indoor space 21, and the second air conditioner includes an ion generator 800. , and the contents of the connection switching process, the other configurations are substantially the same as the air conditioning system 1 according to the first embodiment, so a description thereof will be omitted.

FIG. 38 is a schematic diagram of an air conditioning system according to Embodiment 9. The first air conditioner 100 has an ion generating means (not shown). Examples of the ion generating means include a method in which an electrode is provided in the indoor unit 102 and ions are supplied to the air blown out from the indoor unit 102 into the indoor space 21 . Note that an ion is an atom or molecule that has acquired an electron and is charged.

The ion generator 800 supplies ions to the air in the indoor space 21 . The supply of ions changes the state of the air in the indoor space 21, and the supply of ions is done intentionally, so the ion generator 800 corresponds to an air conditioner.

The ion generator 800 also includes an ion control device 801 that controls the ion supply capacity of the ion generator 800. Here, the ion supply capacity refers to the amount of ions that the ion generator 800 can supply per unit time, which is a certain predetermined period of time. Although not shown, the ion control device 801 also includes a processor, a main storage device, an auxiliary storage device, a communication device, and a bus that connects these devices so that they can communicate with each other.

Furthermore, in the ninth embodiment, the management device 300 is communicably connected to the indoor unit control device 109 and the ion control device 801, and manages at least the first air conditioner 100 and the ion generator 800.

FIG. 39 is a block diagram showing the functional configuration of an air conditioning system according to Embodiment 9. The air conditioning system 1h includes an ion generator control section 1017 and an ion generation section 1018.

The ion generator control unit 1017 controls the ion generator 800. In Embodiment 9, ion generator control section 1017 controls at least ion generation section 1018. The ion generator control unit 1017 is realized by the processor of the ion control device 801 executing various processes according to programs stored in the auxiliary storage device.

The ion generator 1018 generates ions. The ion generator 1018 is realized by an electrode that charges atoms or molecules in the air.

FIG. 40 is a flowchart diagram illustrating connection switching processing of the air conditioning system according to Embodiment 9. FIG. 41 is a sequence diagram showing connection switching processing of the air conditioning system according to the ninth embodiment. Next, the connection switching process of the air conditioning system 1h will be explained. Note that the conditions under which the connection switching process is performed are the same as those under which the connection switching process described in Embodiment 1 is performed, except that the following conditions are added. The connection switching process according to the ninth embodiment is performed on the condition that the first air conditioner 100 supplies ions to the indoor space 21 by the ion generating means.

First, the flow of the connection switching process will be described with reference to FIG. 40. Here, the premise of the conditions for starting the flowchart in FIG. 40 is the same as the conditions for starting the flowchart in FIG. 9 described in Embodiment 1, so the explanation will be omitted.

When the air conditioning system 1h starts the connection switching process, the process first proceeds to step S700. In step S700, like step S100 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to stop supplying power to compressor-side electric motor 150.

After completing the process in step S700, the process advances to step S710. In step S710, the ion generator control unit 1017 controls the ion generator 1018 to increase the ion supply capacity. For example, the ion generator 1018 is controlled to increase the amount of ions supplied to the air in the indoor space 21.

After completing the process in step S710, the process advances to step S720. In step S720, similar to step S120 described in the first embodiment, the first air conditioner control unit 1001 controls the connection switching unit 1003 to switch the connection state between the compressor side electric motor 150 and the power supply unit 1002. .

After completing the process in step S720, the process advances to step S730. In step S730, similarly to step S130 described in the first embodiment, first air conditioner control unit 1001 controls power supply unit 1002 to resume supplying power to compressor-side electric motor 150.

After completing the process in step S730, the process advances to step S740. In step S740, the ion generator control unit 1017 controls the ion generator 1018 to return the ion supply capacity to the ion supply capacity before performing the process in step S710. For example, the ion generating unit 1018 is controlled so as to return the amount of ions supplied to the air in the indoor space 21 to the amount of ions before performing the process in step S710.

After completing the process in step S740, the air conditioning system 1h ends the connection switching process.

Here, the reason for increasing the ion supply capacity in the connection switching process will be explained. In the air conditioning system 1h, the supply of power to the compressor-side electric motor 150 is stopped during the connection switching process, so the first air conditioner 100 is stopped during the connection switching process. When the first air conditioner 100 is stopped for a long time, the concentration of ions in the indoor space 21 decreases due to drafts, etc., and the increase in the air conditioning load of the first air conditioner 100 becomes large. personal comfort is impaired. In the air conditioning system 1h, in order to increase the ion supply capacity of the ion generator 800 in the connection switching process, when heating continues with the ion supply capacity in the connection switching process being the same as the ion supply capacity before the connection switching process, In comparison, the amount of increase in the air conditioning load of the first air conditioner 100 is smaller, and the loss of user comfort is suppressed.

Next, communication in connection switching processing of the air conditioning system 1h will be described with reference to FIG. 41.

First, as in the first embodiment, the first air conditioner 100 transmits a connection switching start signal to the management device 300 (step S200).

After receiving the connection switching start signal in step S200, the management device 300 transmits an ion supply capacity increase signal to the ion generator 800 (step S215). The ion supply capacity increase signal is a signal generated by the management device 300 based on the connection switching start signal, and is a signal containing information for controlling the ion generator 800 to increase the ion supply capacity of the ion generator 800. Further, in the ninth embodiment, the ion supply capacity increase signal is transmitted to the ion control device 801.

After the ion generator 800 receives the ion supply capability increase signal in step S215, the process of step S710 in FIG. 40 is performed.

Further, after the first air conditioner 100 transmits the connection switching start signal in step S200, the process of step S700, the process of step S720, and the process of step S730 in FIG. 40 are sequentially performed.

After completing the process in step S730, the first air conditioner 100 transmits a connection switching end signal to the management device 300 (step S220), as in the first embodiment.

After receiving the connection switching end signal in step S220, the management device 300 transmits an ion supply capacity reduction signal to the ion generator 800 (step S235). The ion supply capacity reduction signal is a signal generated by the management device 300 based on the connection switching end signal, and reduces the ion supply capacity of the ion generator 800 to return it to the ion supply capacity before receiving the humidification capacity increase signal. This signal includes information for controlling the ion generator 800. Further, in the ninth embodiment, the ion supply ability reduction signal is transmitted to the ion control device 801.

After the ion generator 800 receives the ion supply ability reduction signal in step S235, the process of step S740 in FIG. 40 is performed.

As described above, the configuration of the air conditioning system 1h according to the ninth embodiment is similar to that of the air conditioning system 1 according to the first embodiment. A first air conditioner 100 that has an air conditioner 105 and circulates a refrigerant to condition the air in an air conditioning target space (indoor space 21 is applicable); and a first air conditioner that conditions the air in the air conditioner space. 100, a second air conditioner (corresponding to the ion generator 800), a power supply unit 1002 that supplies power to the electric motor, and a connection switching unit 1003 that switches the connection state between the electric motor and the power supply unit 1002. , and before the connection switching unit 1003 switches the connection state between the electric motor and the power supply unit 1002, the power supply unit 1002 reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner 100 changes the connection state. The second air conditioner is configured to transmit the switching start signal, and receive the connection switching start signal or a signal generated based on the connection switching start signal (corresponding to the ion supply capacity increase signal). With this configuration, the air conditioning system 1h according to the ninth embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the air conditioning system 1h according to the ninth embodiment, as an additional configuration, the first air conditioner 100 supplies ions to the air in the air conditioning target space (indoor space 21 corresponds), and the second The air conditioner is an ion generator 800 that supplies ions to the air in the air-conditioned space. is applicable), the ion supply capacity is changed to an ion supply capacity higher than the ion supply capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. With this additional configuration, the air conditioning system 1h according to the ninth embodiment can increase the air conditioning load even when the period when the electric motor is stopped or the period when the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing the loss of user comfort.

Further, in the control method of the air conditioning system 1h according to the ninth embodiment, the refrigerant is compressed by driving the electric motor (compressor side electric motor 150 corresponds to the control method), similar to the control method of the air conditioning system 1 according to the first embodiment. A first air conditioner 100 has a compressor 105 that circulates a refrigerant to condition the air in a space to be air conditioned (indoor space 21 is applicable); A second air conditioner (corresponding to the ion generator 800) that is a device different from the conditioner 100, a power supply unit 1002 that supplies power to the electric motor, and a connection switching unit that switches the connection state between the electric motor and the power supply unit 1002. 1003, a first step (step S700 corresponds) of reducing the voltage or frequency of the power supplied to the electric motor by the power supply unit 1002, and a first air conditioner. 100 transmits a connection switching start signal (step S200 is applicable); and the connection switching unit 1003 is executed after the first step and the second step are completed, and the connection switching unit 1003 changes the connection state between the motor and the power supply unit 1002. A third step (step S720 is applicable) and a signal (ion supply This configuration includes a fourth step (step S215) of receiving a corresponding capability increase signal (step S215). With this configuration, the method for controlling the air conditioning system 1h according to the ninth embodiment can obtain the same effects as those described in the first embodiment.

Furthermore, in the control method for the air conditioning system 1h according to the ninth embodiment, as an additional configuration, the first air conditioner 100 supplies ions to the air in the air conditioning target space (indoor space 21 corresponds); The second air conditioner is an ion generator 800 that supplies ions to the air in the air-conditioned space, and in the seventh step, the ion generator 800 increases the ion supply capacity to the level before the fourth step is performed. It has a configuration in which the ion supply capacity is changed to a higher ion supply capacity. With this additional configuration, the control method for the air conditioning system 1h according to the ninth embodiment allows the air conditioning to be controlled even when the period when the electric motor is stopped or the period when the rotational speed of the electric motor is reduced becomes long. This has the effect of suppressing the loss of user comfort due to an increase in load.

Note that the additional configurations shown in Embodiments 5 to 9 are the air conditioning systems 1, 1a, 1b, 1c, 1d, 1e, 1f shown in Embodiments 1 to 9. , 1g, and 1h.

1 Air conditioning system, 1a to 1h Air conditioning system, 2 Building, 3 AC power source, 21 Indoor space, 22 Outdoor space, 100 First air conditioner, 101 Outdoor unit, 102
indoor unit, 103 first piping, 104 second piping, 105 compressor, 106 power supply device, 107 connection switching device, 108 outdoor unit control device, 108a processor, 108b main storage device, 108c auxiliary storage device, 108d communication device, 108e bus, 108f interface, 108g interface, 109 indoor unit control device, 109a processor, 109b main storage device, 109c auxiliary storage device, 109d communication device, 109e bus, 110 four-way valve, 110a first port, 110b second Port, 110c Third port, 110d Fourth port, 111 Outdoor unit side heat exchanger, 112 Pressure reducing device, 113 Indoor unit side heat exchanger, 114 Outdoor unit piping, 115 Indoor unit piping, 150 Compressor side electric motor , 151 U-phase winding, 151a first U-phase winding terminal, 151b second U-phase winding terminal, 152 V-phase winding, 152a first V-phase winding terminal, 152b second V-phase winding Line terminal, 153 W-phase winding, 153a First W-phase winding terminal, 153b
second W-phase winding terminal, 161 input terminal, 162 rectifier, 163 capacitor, 164 inverter, 164a first switching element, 164b second switching element, 164c third switching element, 164d fourth switching element, 164e
Fifth switching element, 164f Sixth switching element, 164g First inverter terminal, 164h Second inverter terminal, 164i Third inverter terminal, 170 Relay circuit, 170a First relay circuit, 170b Second relay circuit, 170c
Third relay circuit, 171 First relay contact, 172 Second relay contact, 173 Third relay contact, 174 Contact plate, 175 Coil, 176 Neutral point terminal, 200 Ventilation fan, 201 Fan, 202 Ventilation fan side motor , 203 ventilation fan control device, 203a processor, 203b main storage device, 203c auxiliary storage device, 203d communication device, 203e bus, 203f interface, 300 management device, 300a processor, 300b main storage device, 300c auxiliary storage device, 300d communication device, 300e bus, 400 cooling device, 401 cooling control device, 500 heating device, 501 heating control device, 600 dehumidification device, 601 dehumidification control device, 700 humidification device, 701 humidification control device, 800 ion generator, 801 ion control device, 1001 First air conditioner control unit, 1002 Power supply unit, 1003 Connection switching unit, 1004 Management unit, 1005 Ventilation control unit, 1006 Ventilation unit, 1007 Timer unit, 1008 Temperature measurement unit, 1009 Air conditioning unit control unit, 1010 Cooling unit , 1011 heating device control section, 1012 heating section, 1013 dehumidification device control section, 1014 dehumidification section, 1015 humidification device control section, 1016
humidification section, 1017 ion generator control section, 1018 ion generation section.

Claims (12)

a first air conditioner that has a compressor that compresses a refrigerant by driving an electric motor, and that circulates the refrigerant to cool the air in an air-conditioned space;
a second air conditioner that is a cooling device that cools the air in the air conditioned space and is different from the first air conditioner;
a power supply section that supplies power to the electric motor;
a connection switching unit that switches a connection state between the electric motor and the power supply unit ,
Before the connection switching unit switches the connection state between the electric motor and the power supply unit, the power supply unit reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner starts switching the connection. send a signal,
When the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, the second air conditioner generates a cooling capacity based on the connection switching start signal or the connection switching start signal. The air conditioning system changes its cooling capacity to a higher one than the one it had before receiving the signal . a first air conditioner that includes a compressor that compresses a refrigerant by driving an electric motor, and that circulates the refrigerant to dehumidify air in an air conditioning space;
a second air conditioner that is a dehumidifier that dehumidifies the air in the air conditioned space and is different from the first air conditioner;
a power supply section that supplies power to the electric motor;
a connection switching unit that switches a connection state between the electric motor and the power supply unit,
Before the connection switching unit switches the connection state between the electric motor and the power supply unit, the power supply unit reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner starts switching the connection. send a signal,
When the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, the second air conditioner generates a dehumidifying capacity based on the connection switching start signal or the connection switching start signal. The air conditioning system changes its dehumidification capacity to a higher dehumidification capacity than the one it had before receiving the signal. a first air conditioner that includes a compressor that compresses a refrigerant by driving an electric motor, and that circulates the refrigerant to humidify air in an air conditioning space;
a second air conditioner that is a humidifier that humidifies the air in the air conditioned space and is different from the first air conditioner;
a power supply section that supplies power to the electric motor;
a connection switching unit that switches a connection state between the electric motor and the power supply unit,
Before the connection switching unit switches the connection state between the electric motor and the power supply unit, the power supply unit reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner starts switching the connection. send a signal,
When the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, the second air conditioner generates a humidifying capacity based on the connection switching start signal or the connection switching start signal. The air conditioning system changes its humidification capacity to a higher humidification capacity than the one it had before receiving the signal. a first air conditioner having a compressor that compresses a refrigerant by driving an electric motor, circulating the refrigerant and supplying ions to the air in an air conditioned space;
a second air conditioner that is an ion generator that supplies ions to the air in the air conditioned space and is different from the first air conditioner;
a power supply section that supplies power to the electric motor;
a connection switching unit that switches a connection state between the electric motor and the power supply unit,
Before the connection switching unit switches the connection state between the electric motor and the power supply unit, the power supply unit reduces the voltage or frequency of the power supplied to the electric motor, and the first air conditioner starts switching the connection. send a signal,
When the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal, the second air conditioner adjusts the ion supply capacity based on the connection switching start signal or the connection switching start signal. An air conditioning system that changes the ion supply capacity to a higher ion supply capacity than the ion supply capacity before receiving the generated signal. After the connection switching unit finishes switching the connection state between the electric motor and the power supply unit, the first air conditioner transmits a connection switching completion signal,
The air conditioning system according to any one of claims 1 to 4, wherein the second air conditioner receives the connection switching end signal or a signal generated based on the connection switching end signal . After the connection switching section finishes switching the connection state between the electric motor and the power supply section, the power supply section has a frequency higher than the frequency of the power before the connection state between the electric motor and the power supply section is switched. 6. The air conditioning system according to claim 5, wherein frequency power is supplied to the electric motor. having a management means capable of communicating with the first air conditioner and the second air conditioner, and managing the first air conditioner and the second air conditioner;
The management means receives the connection switching start signal, generates a signal based on the connection switching start signal, and transmits the signal generated based on the connection switching start signal to the second air conditioner. 7. The air conditioning system according to any one of 6 to 6. The connection switching unit switches a connection state between the electric motor and the power supply unit from a connection state in which the connection method of the windings of the motor is a delta connection to a connection state in which the connection method of the windings of the motor is a star connection. or a configuration in which the connection state of the windings of the motor is switched from a connection state in which the connection method of the windings of the motor is star connection to a connection state in which the connection method of the windings of the motor is delta connection. air conditioning system. A first air conditioner that has a compressor that compresses a refrigerant by driving an electric motor and circulates the refrigerant to cool the air in the air conditioned space; and a cooling device that cools the air in the air conditioned space. a second air conditioner that is a different device from the first air conditioner, a power supply unit that supplies power to the electric motor, and a connection switching unit that switches a connection state between the electric motor and the power supply unit ; A method of controlling an air conditioning system comprising :
a first step of reducing the voltage or frequency of the power that the power supply unit supplies to the electric motor;
a second step in which the first air conditioner transmits a connection switching start signal ;
a third step, which is carried out after the first step and the second step are completed, and in which the connection switching unit switches the connection state between the electric motor and the power supply unit;
a fourth step, which is carried out after the second step is completed, in which the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal;
Implemented after the fourth step is completed, the second air conditioner has a cooling capacity higher than the cooling capacity before receiving the connection switching start signal or a signal generated based on the connection switching start signal. The fifth step is to change to a higher cooling capacity,
A method for controlling an air conditioning system comprising: A first air conditioner that has a compressor that compresses a refrigerant by driving an electric motor and circulates the refrigerant to dehumidify the air in the air-conditioned space; and a dehumidifier that dehumidifies the air in the air-conditioned space. a second air conditioner that is different from the first air conditioner; a power supply section that supplies power to the electric motor; and a connection switching section that switches a connection state between the electric motor and the power supply section. A method for controlling an air conditioning system, comprising:
a first step of reducing the voltage or frequency of the power that the power supply unit supplies to the electric motor;
a second step in which the first air conditioner transmits a connection switching start signal;
a third step, which is carried out after the first step and the second step are completed, and in which the connection switching unit switches the connection state between the electric motor and the power supply unit;
a fourth step, which is carried out after the second step is completed, in which the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal;
Implemented after the fourth step is completed, the second air conditioner has a dehumidifying capacity higher than the dehumidifying capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. The fifth step is to change to a higher dehumidification capacity,
A method for controlling an air conditioning system comprising: A first air conditioner that includes a compressor that compresses a refrigerant by driving an electric motor and that circulates the refrigerant to humidify the air in the air conditioning space; and a humidifier that humidifies the air in the air conditioning space. a second air conditioner that is different from the first air conditioner; a power supply section that supplies power to the electric motor; and a connection switching section that switches a connection state between the electric motor and the power supply section. A method for controlling an air conditioning system, comprising:
a first step of reducing the voltage or frequency of the power that the power supply unit supplies to the electric motor;
a second step in which the first air conditioner transmits a connection switching start signal;
a third step, which is carried out after the first step and the second step are completed, and in which the connection switching unit switches the connection state between the electric motor and the power supply unit;
a fourth step, which is carried out after the second step is completed, in which the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal;
Implemented after the fourth step is completed, the second air conditioner has a humidifying capacity higher than the humidifying capacity before receiving the connection switching start signal or a signal generated based on the connection switching start signal. The fifth step is also to change the humidification capacity to greater
A method for controlling an air conditioning system comprising: a first air conditioner that has a compressor that compresses a refrigerant by driving an electric motor, circulates the refrigerant, and supplies ions to the air in the air conditioning space; and a first air conditioner that supplies ions to the air in the air conditioning space. a second air conditioner that is an ion generator and is a different device from the first air conditioner; a power supply unit that supplies power to the electric motor; and a connection for switching a connection state between the electric motor and the power supply unit. A control method for an air conditioning system, comprising: a switching unit;
a first step of reducing the voltage or frequency of the power that the power supply unit supplies to the electric motor;
a second step in which the first air conditioner transmits a connection switching start signal;
a third step, which is carried out after the first step and the second step are completed, and in which the connection switching unit switches the connection state between the electric motor and the power supply unit;
a fourth step, which is carried out after the second step is completed, in which the second air conditioner receives the connection switching start signal or a signal generated based on the connection switching start signal;
Implemented after the fourth step is completed, the second air conditioner changes the ion supply capacity to the ion supply capacity before receiving the connection switching start signal or the signal generated based on the connection switching start signal. The fifth step is to change the ion supply capacity to a higher one than the capacity,
A method for controlling an air conditioning system comprising:

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