Outdoor unit control circuit, outdoor unit and air conditioner

Abstract

The utility model discloses an outdoor unit control circuit, an outdoor unit and an air conditioner, and the outdoor unit control circuit comprises a first receiving unit which is suitable for receiving an awakening instruction sent by an indoor unit; the first control end of the first controllable switch unit is connected with the output end of the first receiving unit, and the input end of the first controllable switch unit is suitable for being connected with a power supply; the second controllable switch unit is configured to establish a communication loop with the first receiving unit, the first controllable switch unit and the indoor unit under the condition that the first receiving unit receives the wake-up instruction, so that the first controllable switch unit is turned on; and the first charging unit and the outdoor unit control unit are configured to generate a first power supply according to the power supply under the condition that the first controllable switch unit is switched on, and supply power to the outdoor unit control unit by using the first power supply. The circuit is powered on through the first controllable switch unit, and therefore a relay on the indoor unit side is omitted.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and particularly relates to an outdoor unit control circuit, an outdoor unit, and an air conditioner. Background Art

[0002] In the related art, the indoor unit and the outdoor unit of a split air conditioner usually communicate through a current loop communication circuit, and the indoor unit controls the power on or off of the outdoor unit through a high-power relay. Since a high-power relay is added to the indoor unit control circuit, the volume of the indoor unit's electronic control is relatively large. Moreover, when the high-power relay is cut off, current will flow through the indoor unit control circuit, thus increasing the risk of fire in the indoor unit control circuit. Summary of the Utility Model

[0003] The present utility model aims to at least solve one of the technical problems in the related art to some extent. For this purpose, the first object of the present utility model is to propose an outdoor unit control circuit. A first controllable switch unit is arranged in the communication loop between the indoor unit and the outdoor unit, and the communication loop is used to turn on the first controllable switch unit to supply power to the outdoor unit. In this way, there is no need to set a relay in the indoor unit to control the power on or off of the outdoor unit, thereby reducing the volume of the indoor unit's electronic control, and further reducing the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thus improving the safety of the indoor unit.

[0004] The second object of the present utility model is to propose an outdoor unit.

[0005] The third object of the present utility model is to propose an air conditioner.

[0006] To achieve the above object, according to the first aspect embodiment of the present utility model, an outdoor unit control circuit is proposed, including: a first receiving unit adapted to receive a wake-up instruction sent by an indoor unit; a first controllable switch unit, the first control end of the first controllable switch unit is connected to the output end of the first receiving unit, and the input end of the first controllable switch unit is adapted to be connected to a power supply; a second controllable switch unit, the first input end of the second controllable switch unit is connected to the second control end of the first controllable switch unit, the first output end of the second controllable switch unit is adapted to be connected to the indoor unit, and the second controllable switch unit is configured to establish a communication loop with the first receiving unit, the first controllable switch unit, and the indoor unit when the first receiving unit receives the wake-up instruction, so as to turn on the first controllable switch unit; a first charging unit and an outdoor unit control unit, the input end of the first charging unit is connected to the output end of the first controllable switch unit, the output end of the first charging unit is connected to the power supply end of the outdoor unit control unit, and the first charging unit is configured to generate a first power supply according to the power supply when the first controllable switch unit is turned on, and use the first power supply to supply power to the outdoor unit control unit to wake up the outdoor unit.

[0007] The outdoor unit control circuit according to an embodiment of the present utility model includes a first receiving unit, a first controllable switch unit, a second controllable switch unit, a first charging unit, and an outdoor unit control unit. Among them, the first control end of the first controllable switch unit is connected to the output end of the first receiving unit, and the input end of the first controllable switch unit is adapted to be connected to a power source. The first input end of the second controllable switch unit is connected to the second control end of the first controllable switch unit, and the first output end of the second controllable switch unit is adapted to be connected to an indoor unit. The second controllable switch unit is configured to establish a communication loop with the first receiving unit, the first controllable switch unit, and the indoor unit when the first receiving unit receives a wake-up instruction, so that the first controllable switch unit is turned on. The input end of the first charging unit is connected to the output end of the first controllable switch unit, and the output end of the first charging unit is connected to the power supply end of the outdoor unit control unit. The first charging unit is configured to generate a first power supply according to the power source and supply power to the outdoor unit control unit with the first power supply to wake up the outdoor unit when the first controllable switch unit is turned on. Thus, when the outdoor unit needs to be powered on, the indoor unit sends a wake-up instruction to the first receiving unit, and the first receiving unit, the first controllable switch unit, and the second controllable switch unit form a communication loop with the indoor unit, so that the first controllable switch unit is turned on. After the first controllable switch unit is turned on, it provides power to the first charging unit, and the first charging unit generates a first power supply according to the power source to supply power to the outdoor unit control unit, thereby waking up the outdoor unit. Therefore, the indoor unit only needs to send a wake-up instruction from the first receiving unit to power on and wake up the outdoor unit, without the need to set a relay in the indoor unit to control the power on or off of the outdoor unit, thereby reducing the volume of the indoor unit's electronic control, and further reducing the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thereby improving the safety of the indoor unit.

[0008] According to an embodiment of the present utility model, the outdoor unit control circuit further includes: a voltage detection unit adapted to detect the voltage of the first power supply to obtain a voltage detection value; a third controllable switch unit, one end of the third controllable switch unit is adapted to be connected to a power source, and the other end of the third controllable switch unit is connected to the input end of the first charging unit; the outdoor unit control unit is respectively connected to the voltage detection unit and the third controllable switch unit, and the outdoor unit control unit is further configured to control the second controllable switch unit to stop transmitting signals to the indoor unit when the voltage detection value is greater than a preset voltage threshold, so that the first controllable switch unit is turned off, and control the third controllable switch unit to supply power to the first charging unit.

[0009] According to an embodiment of the present utility model, the second controllable switch unit includes: a first relay, a first end of the first relay is connected to a second control end of the first controllable switch unit, a second end of the first relay is adapted to be connected to an indoor unit, and a third end of the first relay is suspended. Wherein, the first end and the second end of the first relay are normally closed contacts; a first driving module, an input end of the first driving module is connected to a first output end of an outdoor unit control unit, an output end of the first driving module is connected to a coil of the first relay, and the first driving module is further configured to drive the first end and the third end of the first relay to attract according to a first control signal sent by the outdoor unit control unit, so that the second controllable switch unit stops transmitting signals to the indoor unit.

[0010] According to an embodiment of the present utility model, the second controllable switch unit includes: a first triode, a collector of the first triode is connected to a second control end of the first controllable switch unit, an emitter of the first triode is adapted to be connected to an indoor unit, and a control end of the first triode has a first node; a first resistor, one end of the first resistor is connected to the first node, and the other end of the first resistor is connected to an output end of the first receiving unit; a second resistor, one end of the second resistor is connected to the first node, and the other end of the second resistor is connected to the emitter of the first triode; a first optocoupler, one end of a light-receiving portion of the first optocoupler is connected to a second output end of the outdoor unit control unit, the other end of the light-receiving portion of the first optocoupler is connected to a third output end of the outdoor unit control unit, and a light-emitting portion of the first optocoupler is connected in parallel between two ends of the second resistor.

[0011] According to an embodiment of the present utility model, when the second controllable switch unit transmits signals to the indoor unit, the first optocoupler is disconnected; when the second controllable switch unit stops transmitting signals to the indoor unit, the first optocoupler is turned on.

[0012] According to an embodiment of the present utility model, the third controllable switch unit includes: a second relay, a first end of the second relay is adapted to be connected to a power supply, and a second end of the second relay is connected to an input end of the first charging unit; a second driving module, an input end of the second driving module is connected to a third output end of the outdoor unit control unit, an output end of the second driving module is connected to a coil of the second relay, and the second driving module is configured to drive the first end and the second end of the second relay to attract according to a second control signal sent by the outdoor unit control unit, so as to supply power to the first charging unit.

[0013] According to an embodiment of the present utility model, the outdoor unit control circuit further includes: a first sending unit, an output end of the first sending unit is connected to an output end of the second controllable switch unit, and an input end of the first sending unit is connected to an output end of the first receiving unit; a fourth output end of the outdoor unit control unit is connected to a control end of the first sending unit, and the outdoor unit control unit is further configured to control the first sending unit to send a communication signal to the indoor unit when controlling the second controllable switch unit to stop transmitting a signal to the indoor unit and lasting for a first preset duration, so that the outdoor unit enters a communication state.

[0014] According to an embodiment of the present utility model, the first sending unit includes: a second triode, a control end of the second triode is connected to the outdoor unit control unit through a third resistor, and an emitter of the second triode is grounded; a fourth resistor, one end of the fourth resistor is connected to a collector of the second triode; a fifth resistor, one end of the fifth resistor is adapted to be connected to a preset power supply, and the other end of the fifth resistor is connected to the other end of the fourth resistor; a second optocoupler, one end of a light emitting part of the second optocoupler is connected to one end of the fourth resistor, the other end of the light emitting part of the second optocoupler is connected to the other end of the fourth resistor, one end of a light receiving part of the second optocoupler is connected to an output end of the first receiving unit, and the other end of the light receiving part of the second optocoupler is adapted to be connected to the outdoor unit.

[0015] According to an embodiment of the present utility model, the first receiving unit is further adapted to receive a shutdown instruction sent by the indoor unit; an input end of the outdoor unit control unit is connected to an output end of the first receiving unit, and the outdoor unit control unit is further configured to control the third controllable switch unit to stop supplying power to the first charging unit when the outdoor unit enters a communication state and receives the shutdown instruction.

[0016] According to an embodiment of the present utility model, the first controllable switch unit includes a solid state relay.

[0017] According to an embodiment of the present utility model, the first receiving unit includes: a third optocoupler, one end of a light emitting part of the third optocoupler is adapted to be connected to the indoor unit, the other end of the light emitting part of the third optocoupler is connected to a first control end of the first controllable switch unit, one end of a light receiving part of the third optocoupler is connected to the outdoor unit control unit through a sixth resistor, and the other end of the light receiving part of the third optocoupler is adapted to be connected to a preset power supply; a seventh resistor, one end of the seventh resistor is connected to one end of the light receiving part of the third optocoupler, and the other end of the seventh resistor is grounded; an eighth resistor, the eighth resistor is connected in parallel between two ends of the light emitting part of the third optocoupler.

[0018] According to an embodiment of the present utility model, the first charging unit includes: a first rectification module, a first end of the first rectification module is adapted to be connected to the neutral line, and a second end of the first rectification module is connected to an output end of the first controllable switch unit; a first electrolytic capacitor, one end of the first electrolytic capacitor is respectively connected to a third end of the first rectification module and a power supply end of the outdoor unit control unit, and the other end of the first electrolytic capacitor is respectively connected to a fourth end of the first rectification module and an output end of the outdoor unit control unit.

[0019] To achieve the above object, according to a second aspect embodiment of the present utility model, an outdoor unit is provided, including: the outdoor unit control circuit of any of the foregoing embodiments.

[0020] For the outdoor unit according to the embodiment of the present utility model, by adopting the above outdoor unit control circuit, the first controllable switch unit is arranged in the communication loop between the indoor unit and the outdoor unit, and the communication loop is used to turn on the first controllable switch unit to supply power to the outdoor unit. In this way, there is no need to set a relay in the indoor unit to control the power-on or power-off of the outdoor unit, thereby reducing the volume of the indoor unit's electric control, and further reducing the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thereby improving the safety of the indoor unit.

[0021] To achieve the above object, according to a third aspect embodiment of the present utility model, an air conditioner is provided, including: an indoor unit, the indoor unit is adapted to send a wake-up instruction; the foregoing outdoor unit, the outdoor unit is connected to the indoor unit and is configured to be woken up when receiving the wake-up instruction.

[0022] For the air conditioner according to the embodiment of the present utility model, by adopting the above outdoor unit, the first controllable switch unit is arranged in the communication loop between the indoor unit and the outdoor unit, and the communication loop is used to turn on the first controllable switch unit to supply power to the outdoor unit. In this way, there is no need to set a relay in the indoor unit to control the power-on or power-off of the outdoor unit, thereby reducing the volume of the indoor unit's electric control, and further reducing the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thereby improving the safety of the indoor unit.

[0023] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of an outdoor unit control circuit and an indoor unit control circuit in the related art;

[0025] Figure 2 is a schematic structural diagram of an outdoor unit control circuit and an indoor unit control circuit according to an embodiment of the present utility model;

[0026] Figure 3It is a circuit diagram of an outdoor unit control circuit and an indoor unit control circuit according to an embodiment of the present utility model;

[0027] Figure 4 It is a circuit diagram of an outdoor unit control circuit and an indoor unit control circuit in an operating state according to an embodiment of the present utility model;

[0028] Figure 5 It is a circuit diagram of an outdoor unit control circuit and an indoor unit control circuit according to another embodiment of the present utility model;

[0029] Figure 6 It is a schematic structural diagram of an outdoor unit according to an embodiment of the present utility model;

[0030] Figure 7 It is a schematic structural diagram of an air conditioner according to an embodiment of the present utility model. Detailed implementation manners

[0031] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0032] It should be noted that this application is made by the inventor's understanding and research on the following problems:

[0033] In the related art, the indoor unit and the outdoor unit of a split air conditioner usually communicate using a current loop communication circuit as shown in Figure 1 As shown in Figure 1 The indoor unit control circuit 200 is provided with a relay K. One end of the relay K is adapted to be connected to the live wire L, and the other end of the relay K is connected to the outdoor unit control circuit 100. When the relay K is closed, the outdoor unit is powered on; when the relay K is turned off, the outdoor unit is powered off. Since a high-power relay K is added to the indoor unit control circuit 200, the volume of the indoor unit electronic control is relatively large. Moreover, when the high-power relay K is cut off, current will flow through the indoor unit control circuit 200, thereby increasing the risk of fire in the indoor unit control circuit 200.

[0034] Based on this, the embodiments of the present utility model provide an outdoor unit control circuit, an outdoor unit and an air conditioner. The first controllable switch unit is arranged in the communication loop between the indoor unit and the outdoor unit, and the communication loop is used to turn on the first controllable switch unit to supply power to the outdoor unit. In this way, there is no need to set a relay in the indoor unit to control the power on or off of the outdoor unit, thereby reducing the volume of the indoor unit electronic control, and further reducing the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thereby improving the safety of the indoor unit.

[0035] The control circuit of the outdoor unit, the outdoor unit and the air conditioner according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0036] Figure 2 It is a schematic structural diagram of the control circuit of the outdoor unit and the control circuit of the indoor unit according to an embodiment of the present invention. As Figure 2 shown, the control circuit 100 of the outdoor unit includes: a first receiving unit 110, a first controllable switch unit 120, a second controllable switch unit 130, a first charging unit 140, and an outdoor unit control unit 150.

[0037] Among them, the first receiving unit 110 is adapted to receive a wake-up instruction sent by the indoor unit; the first control end of the first controllable switch unit 120 is connected to the output end of the first receiving unit 110, and the input end of the first controllable switch unit 120 is adapted to be connected to a power supply; the first input end of the second controllable switch unit 130 is connected to the second control end of the first controllable switch unit 120, and the first output end of the second controllable switch unit 130 is adapted to be connected to the indoor unit. The second controllable switch unit 130 is configured to establish a communication loop with the first receiving unit 110, the first controllable switch unit 120, and the indoor unit when the first receiving unit 110 receives the wake-up instruction, so as to turn on the first controllable switch unit 120; the input end of the first charging unit 140 is connected to the output end of the first controllable switch unit 120, and the output end of the first charging unit 140 is connected to the power supply end of the outdoor unit control unit 150. The first charging unit 140 is configured to generate a first power supply according to the power supply when the first controllable switch unit 120 is turned on, and use the first power supply to supply power to the outdoor unit control unit 150 to wake up the outdoor unit.

[0038] Specifically, the indoor unit includes an indoor unit control circuit 200. The indoor unit control circuit 200 is connected to the outdoor unit control circuit 100 through a communication line S, a neutral line N, a live line L, and a common ground wire PE. The indoor unit control circuit 200 includes a second charging unit 210, a second sending unit 220, a second receiving unit 230, and an indoor unit control unit 240. The input end of the second charging unit 210 is connected to the live line L and the neutral line N to generate a second power supply according to the power supply and supply power to the indoor unit control unit 240 to power on the indoor unit. The output end of the second receiving unit 230 is connected to the input end of the second sending unit 220. After the indoor unit is powered on, if the indoor unit control unit 240 receives an instruction that the outdoor unit needs to be powered on, the indoor unit control unit 240 controls the second sending unit 220 to send a wake-up instruction to the first receiving unit 110 through the neutral line N. The second sending unit 220, the neutral line N, the first receiving unit 110, the first controllable switch unit 120, the second controllable switch unit 130, the communication line S, and the second receiving unit 230 form a communication loop. Therefore, the first controllable switch unit 120 is in an on state. The input end of the first controllable switch unit 120 is adapted to be connected to the live line L. The first controllable switch unit 120 provides power to the first charging unit 140 in the on state. The first charging unit 140 generates a first power supply according to the power supply to supply power to the outdoor unit control unit 150, thereby waking up the outdoor unit.

[0039] Optionally, such as Figure 3As shown, the second transmitting unit 220 includes a third triode Q3, a fourth optocoupler IC4, a tenth resistor R10, an eleventh resistor R11, and a regulated power supply 221. The control terminal of the third triode Q3 is connected to the first output terminal of the indoor unit control unit 240 through a ninth resistor R9. The emitter of the third triode Q3 is grounded. The collector of the third triode Q3 is connected to one end of the tenth resistor R10. The other end of the tenth resistor R10 is connected to one end of the eleventh resistor R11. The other end of the eleventh resistor R11 is adapted to input a preset power supply. The anode of the light-emitting part of the fourth optocoupler IC4 is connected to the other end of the tenth resistor R10. The cathode of the light-emitting part of the fourth optocoupler IC4 is connected to one end of the tenth resistor R10. The light-receiving part of the fourth optocoupler IC4 is connected to the regulated power supply 221. The regulated power supply 221 includes a twelfth resistor R12, a first zener diode ZV1, a thirteenth resistor R13, a second zener diode ZV2, a first capacitor C1, and a fourteenth resistor R14. The twelfth resistor R12 is connected in parallel between both ends of the light-receiving part of the fourth optocoupler IC4. The first zener diode ZV1 is connected in parallel with the twelfth resistor R12. One end of the thirteenth resistor R13 is connected to the anode of the first zener diode ZV1, the anode of the second zener diode ZV2, and the other end of the first capacitor C1 respectively. The other end of the thirteenth resistor R13 is connected to the cathode of the second zener diode ZV2. One end of the first capacitor C1 is connected to the cathode of the second zener diode ZV2 and the neutral line N respectively. One end of the fourteenth resistor R14 is connected to the anode of the first zener diode ZV1. The other end of the fourteenth resistor R14 is connected to the live wire L through a first diode D1.

[0040] As Figure 3 shown, the second receiving unit 230 includes a second diode D2, a first thermistor PTC1, a fifth optocoupler IC5, a fifteenth resistor R15, a sixteenth resistor R16, and a seventeenth resistor R17. The anode of the second diode D2 is connected to the communication line S. The cathode of the second diode D2 is connected to one end of the first thermistor PTC1. The other end of the first thermistor PTC1 is connected to one end of the fifteenth resistor R15 and the anode of the light-emitting part of the fifth optocoupler IC5 respectively. The cathode of the light-emitting part of the fifth optocoupler IC5 is connected to the other end of the fifteenth resistor R15 and one end of the light-receiving part of the fourth optocoupler IC4 respectively. One end of the light-receiving part of the fifth optocoupler IC5 is adapted to input a preset power supply. The other end of the light-receiving part of the fifth optocoupler IC5 is connected to one end of the sixteenth resistor R16 and one end of the seventeenth resistor R17 respectively. The other end of the sixteenth resistor R16 is connected to the first input terminal of the indoor unit control unit 240. The other end of the seventeenth resistor R17 is grounded.

[0041] Specifically, when the indoor unit control unit 240 receives an instruction that the outdoor unit needs to be powered on, the indoor unit control unit 240 controls the third triode Q3 to turn on, the fourth optocoupler IC4 to turn on, and the regulated power supply 221 to generate a DC power supply. The current signal (i.e., the wake-up instruction) generated by the DC power supply is transmitted to the first receiving unit 110 through the neutral line N, and then the current signal flows into the first input terminal of the first controllable switch unit 120, flows out from the second control terminal of the first controllable switch unit 120, then flows into the first input terminal of the second controllable switch unit 130, flows out from the first output terminal of the second controllable switch unit 130, and then flows into the fifth optocoupler IC5 through the communication line S to turn on the fifth optocoupler IC5, and then flows into the fourth optocoupler IC4, thus forming a communication loop.

[0042] In an alternative embodiment, the indoor unit control unit 240 is further configured to, after controlling the second sending unit 220 to send a wake-up instruction to the first receiving unit 110, if the first input terminal of the indoor unit control unit 240 is at a low level and lasts for a second preset duration, generate a first prompt message and display the first prompt message on the display unit 250, where the first prompt message is used to prompt that the wake-up of the outdoor unit fails or the outdoor unit is faulty. The indoor unit control unit 240 is further configured to, after controlling the second sending unit 220 to send a wake-up instruction to the first receiving unit 110 multiple times, if the first input terminal of the indoor unit control unit 240 is at a low level, generate a first prompt message and display the first prompt message on the display unit 250.

[0043] Specifically, when the indoor unit and the outdoor unit are working normally, after the second sending unit 220 sends a wake-up instruction, the second controllable switch unit 130 inputs a current signal to the second receiving unit 230 through the communication line S. After the second receiving unit 230 is turned on, it inputs an electrical signal to the outdoor unit control unit 150, and the first input terminal of the indoor unit control unit 240 is at a high level. In this way, the indoor unit control unit 240 can determine whether the outdoor unit is faulty according to the electrical signal of the first input terminal of the indoor unit control unit 240. If the first input terminal of the indoor unit control unit 240 is at a low level, or when the second sending unit 220 sends a wake-up instruction multiple times and the first input terminal of the indoor unit control unit 240 is still at a low level, it is determined that the wake-up fails or the outdoor unit has a fault.

[0044] In the above embodiments, a first controllable switch unit is added to the communication loop between the indoor unit control circuit and the outdoor unit control circuit. When the indoor unit control circuit needs to control the outdoor unit to power on, by sending a wake-up instruction, the first controllable switch unit on the communication loop is turned on. The first controllable switch unit provides power to the first charging unit, and the first charging unit powers the outdoor unit control unit, thereby realizing power-on and wake-up of the outdoor unit. Therefore, the indoor unit control circuit does not need to set a relay anymore, which reduces the volume of the indoor unit's electronic control, and further reduces the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thereby improving the safety of the indoor unit.

[0045] In some embodiments, as Figure 3 and Figure 4 shown, the outdoor unit control circuit 100 further includes: a voltage detection unit 160 and a third controllable switch unit 170. Among them, the voltage detection unit 160 is adapted to detect the voltage of the first power supply to obtain a voltage detection value; one end of the third controllable switch unit 170 is adapted to be connected to the power supply, and the other end of the third controllable switch unit 170 is connected to the input end of the first charging unit 140; the outdoor unit control unit 150 is respectively connected to the voltage detection unit 160 and the third controllable switch unit 170. The outdoor unit control unit 150 is further configured to control the second controllable switch unit 130 to stop transmitting signals to the indoor unit when the voltage detection value is greater than a preset voltage threshold, so that the first controllable switch unit 120 is turned off, and control the third controllable switch unit 170 to provide power to the first charging unit 140.

[0046] Specifically, when the voltage detection value is greater than the preset voltage threshold, it indicates that the outdoor unit has completed wake-up and the first controllable switch unit 120 needs to be disconnected from the communication loop. After the second controllable switch unit 130 stops transmitting signals to the indoor unit, the first receiving unit 110, the first controllable switch unit 120, and the second controllable switch unit 130 cannot form a communication loop with the indoor unit. Therefore, the first controllable switch unit 120 is disconnected from the communication loop. Thus, the first controllable switch unit 120 is in an off state, and there is an open circuit between the input end and the output end of the first controllable switch unit 120, and it cannot provide power to the first charging unit 140. By controlling the third controllable switch unit 170 to be turned on, power is provided to the first charging unit 140. When the voltage detection value is less than or equal to the preset voltage threshold, the second controllable switch unit 130 continues to transmit signals to the indoor unit to form a communication loop with the first receiving unit 110, the first controllable switch unit 120, and the indoor unit.

[0047] In an alternative embodiment, the indoor unit control unit 240 also controls the indoor unit to exit the wake-up state and enter the working state when the first input end of the indoor unit control unit 240 changes from a high level to a low level.

[0048] In the above embodiment, when the voltage detection value is greater than the preset voltage threshold, the outdoor unit is woken up, and then the second controllable switch unit is controlled to stop transmitting signals to the indoor unit, and the first charging unit supplies power to the outdoor unit control unit according to the power supply provided by the third controllable switch unit, so that the first controllable switch unit disconnects from the communication loop, without affecting the normal operation of the outdoor unit.

[0049] In some embodiments, such as Figure 3 and Figure 4 shown, the second controllable switch unit 130 includes: a first relay K1 and a first driving module 131. Among them, the first end 1 of the first relay K1 is connected to the second control end of the first controllable switch unit 120, the second end 2 of the first relay K1 is adapted to be connected to the indoor unit, the third end 3 of the first relay K1 is suspended, and the first end 1 and the second end 2 of the first relay K1 are normally closed contacts; the input end of the first driving module 131 is connected to the first output end of the outdoor unit control unit 150, the output end of the first driving module 131 is connected to the coil of the first relay K1, and the first driving module 131 is further configured to drive the first end 1 and the third end 3 of the first relay K1 to attract according to the first control signal sent by the outdoor unit control unit 150, so that the second controllable switch unit 130 stops transmitting signals to the indoor unit.

[0050] Specifically, the second end 2 of the first relay K1 is connected to the communication line S. Since the first end 1 and the second end 2 of the first relay K1 are normally closed contacts and the first end 1 and the second end 2 of the first relay K1 attract in the default state, when the outdoor unit is woken up, the current can flow into the communication line S through the first relay K1, thus forming a communication loop. The output end of the first driving module 131 is connected to the coil of the first relay K1, and the other end of the coil of the first relay K1 is adapted to input a preset power supply. When the voltage detection value is greater than the preset voltage threshold, the outdoor unit control unit 150 sends a first control signal to the first driving module 131, and the first driving module 131 drives the first end 1 and the third end 3 of the first relay K1 to attract according to the first control signal. The third end of the first relay K1 is suspended, and the connection between the first end of the first relay K1 and the communication line S is disconnected, and signals cannot be transmitted to the indoor unit. Therefore, the first relay K1 cannot form a communication loop with the first receiving unit 110, the first controllable switch unit 120, and the indoor unit.

[0051] In the above embodiment, by controlling the attraction of the first end and the second end or the third end of the first relay, the control of whether the second controllable switch unit transmits signals to the indoor unit is realized.

[0052] In some embodiments, such as Figure 5As shown, the second controllable switch unit 130 includes: a first triode Q1, a first resistor R1, a second resistor R2, and a first optocoupler IC1. Among them, the collector of the first triode Q1 is connected to the second control end of the first controllable switch unit 120, the emitter of the first triode Q1 is adapted to be connected to the indoor unit, and the control end of the first triode Q1 has a first node J1; one end of the first resistor R1 is connected to the first node J1, and the other end of the first resistor R1 is connected to the output end of the first receiving unit 110; one end of the second resistor R2 is connected to the first node J1, and the other end of the second resistor R2 is connected to the emitter of the first triode Q1; one end of the light-receiving part of the first optocoupler IC1 is connected to the second output end of the outdoor unit control unit 150, the other end of the light-receiving part of the first optocoupler IC1 is connected to the third output end of the outdoor unit control unit 150, and the light-emitting part of the first optocoupler IC1 is connected in parallel between both ends of the second resistor R2.

[0053] That is to say, the second controllable switch unit 130 is not limited to including a relay, and a circuit composed of a triode and an optocoupler can also be adopted. The triode and the optocoupler are components with separate functions, which can reduce the controls of the outdoor unit's electric control and effectively reduce the cost of the outdoor unit's electric control. When the first triode Q1 is turned on, the second controllable switch unit 130 conducts signal transmission; when the first triode Q1 is turned off, the second controllable switch unit 130 stops signal transmission. The turning off of the first triode Q1 is controlled by the first optocoupler IC1.

[0054] Furthermore, in some embodiments, when the second controllable switch unit 130 transmits a signal to the indoor unit, the first optocoupler IC1 is turned off; when the second controllable switch unit 130 stops transmitting a signal to the indoor unit, the first optocoupler IC1 is turned on.

[0055] Specifically, the turning on of the first optocoupler IC1 is controlled by the outdoor unit control unit 150. When the first optocoupler IC1 is turned off, the control end of the first triode Q1 is pulled to a high level through the first resistor R1, so the first triode Q1 is turned on, and the second controllable switch unit 130 transmits a signal to the indoor unit; when the first optocoupler IC1 is turned on, the voltage difference between the control end and the collector of the first triode Q1 is small, and the first triode Q1 cannot be turned on, so the second controllable switch unit 130 stops transmitting a signal to the indoor unit.

[0056] In some embodiments, such as Figure 3 and Figure 4As shown, the third controllable switch unit 170 includes: a second relay K2 and a second driving module 171. Among them, the first end of the second relay K2 is adapted to be connected to a power supply, and the second end of the second relay K2 is connected to the input end of the first charging unit 140; the input end of the second driving module 171 is connected to the third output end of the outdoor unit control unit 150, and the output end of the second driving module 171 is connected to the coil of the second relay K2. The second driving module 171 is configured to drive the first end and the second end of the second relay K2 to be attracted according to the second control signal sent by the outdoor unit control unit 150, so as to supply power to the first charging unit 140.

[0057] Specifically, when the second relay K2 is in the off state, the first controllable switch unit 120 supplies power to the first charging unit 140. When the outdoor unit needs to enter the normal communication state, the first controllable switch unit 120 disconnects from the communication loop and cannot supply power. The outdoor unit control unit 150 sends a second control signal to the second driving module 171. The second driving module 171 drives the first end and the second end of the second relay K2 to be attracted according to the second control signal, and the first charging unit 140 is powered according to the power supplied by the third controllable switch unit 170.

[0058] In some embodiments, as Figure 3 shown, the outdoor unit control circuit 100 further includes: a first sending unit 180. The output end of the first sending unit 180 is connected to the output end of the second controllable switch unit 130, and the input end of the first sending unit 180 is connected to the output end of the first receiving unit 110; the fourth output end of the outdoor unit control unit 150 is connected to the control end of the first sending unit 180. The outdoor unit control unit 150 is further configured to control the first sending unit 180 to send a communication signal to the indoor unit when controlling the second controllable switch unit 130 to stop transmitting signals to the indoor unit and lasting for a first preset duration, so that the outdoor unit enters the communication state.

[0059] Specifically, when the second controllable switch unit 130 stops transmitting signals to the indoor unit, the communication loop is disconnected. In order to enable the indoor unit and the outdoor unit to enter the normal communication state, the first sending unit 180 is controlled to send a communication signal to the indoor unit after delaying for the first preset duration. In this way, the second sending unit 220, the neutral line N, the first receiving unit 110, the first sending unit 180, the communication line S, and the second receiving unit 230 form a communication loop, so that the indoor unit and the outdoor unit can communicate normally, and the indoor unit and the outdoor unit enter the normal working state.

[0060] In the above embodiment, when the first controllable switch unit disconnects from the communication loop, the first sending unit is controlled to send a communication signal to the indoor unit, forming a new communication loop, so that the indoor unit and the outdoor unit can communicate normally.

[0061] In some embodiments, as Figure 3 shown, the first transmitting unit 180 includes: a second triode Q3, a fourth resistor R4, a fifth resistor R5, and a second optocoupler IC2. Among them, the control terminal of the second triode Q3 is connected to the outdoor unit control unit 150 through a third resistor R3, and the emitter of the second triode Q3 is grounded; one end of the fourth resistor R4 is connected to the collector of the second triode Q3; one end of the fifth resistor R5 is adapted to be connected to a preset power supply, and the other end of the fifth resistor R5 is connected to the other end of the fourth resistor R4; one end of the light-emitting part of the second optocoupler IC2 is connected to one end of the fourth resistor R4, and the other end of the light-emitting part of the second optocoupler IC2 is connected to the other end of the fourth resistor R4. One end of the light-receiving part of the second optocoupler IC2 is connected to the output terminal of the first receiving unit 110, and the other end of the light-receiving part of the second optocoupler IC2 is adapted to be connected to the outdoor unit.

[0062] Specifically, the outdoor unit control unit 150 controls the second triode Q3 to turn on. After the second triode Q3 turns on, it pulls the cathode of the light-emitting part of the second optocoupler IC2 to a low level, so the second optocoupler IC2 turns on. The current generated by the regulated power supply 221 in the second transmitting unit 220 flows from the first receiving unit 110 through the light-receiving part of the second optocoupler IC2, and then flows into the second receiving unit 230.

[0063] In an alternative embodiment, in order to prevent the current in the communication loop from being too large and causing damage to the devices on the communication loop, the outdoor unit control circuit 100 further includes an eighteenth resistor R18 and a third diode D3. One end of the eighteenth resistor R18 is respectively connected to the output terminal of the second controllable switch unit 130 and the output terminal of the first transmitting unit 180. The other end of the eighteenth resistor R18 is connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to the communication line S. The eighteenth resistor R18 can limit the current output by the second controllable switch unit 130 or the first transmitting unit 180, and the third diode D3 can prevent reverse voltage shock.

[0064] In some embodiments, the first receiving unit 110 is further adapted to receive a shutdown instruction sent by the indoor unit; the input terminal of the outdoor unit control unit 150 is connected to the output terminal of the first receiving unit 110. The outdoor unit control unit 150 is further configured to control the third controllable switch unit 170 to stop supplying power to the first charging unit 140 when the outdoor unit enters the communication state and receives the shutdown instruction.

[0065] Specifically, after the outdoor unit enters the communication state, the outdoor unit communicates through a communication loop formed by the second sending unit 220, the first receiving unit 110, the first sending unit 180, and the second receiving unit 230. When the air conditioner needs to be shut down, the indoor unit control unit 240 sends a shutdown instruction to the first receiving unit 110 through the second sending unit 220, and the first receiving unit 110 sends the shutdown instruction to the outdoor unit control unit 150. The outdoor unit control unit 150 controls the second relay K2 to disconnect, and the third controllable switch unit 170 stops supplying power to the first charging unit 140, and the outdoor unit loses power.

[0066] In the above embodiment, after the outdoor unit enters the communication state, the third controllable switch unit supplies power to the first charging unit. Therefore, when receiving a shutdown instruction, controlling the third controllable switch unit to stop supplying power to the first charging unit can control the outdoor unit to lose power, thereby achieving low-power standby.

[0067] In some embodiments, as Figures 3 to 5 shown, the first controllable switch unit 120 includes a solid-state relay K3.

[0068] It should be noted that the first controllable switch unit 120 is not limited to using a solid-state relay, and a low-coil-power consumption relay can also be used to further reduce the power consumption of the outdoor unit.

[0069] Furthermore, the first controllable switch unit 120 further includes a nineteenth resistor R19. One end of the nineteenth resistor R19 is connected to the second control end of the solid-state relay K3, and the other end of the nineteenth resistor R19 is connected to the input end of the second controllable switch unit 130 to limit the current output from the second control end of the solid-state relay K3.

[0070] In some embodiments, as Figure 3 shown, the first receiving unit 110 includes: a third optocoupler IC3, a seventh resistor R7, and an eighth resistor R8. Among them, one end of the light-emitting part of the third optocoupler IC3 is adapted to be connected to the indoor unit, the other end of the light-emitting part of the third optocoupler IC3 is connected to the first control end of the first controllable switch unit 120, one end of the light-receiving part of the third optocoupler IC3 is connected to the outdoor unit control unit 150 through a sixth resistor, and the other end of the light-receiving part of the third optocoupler IC3 is adapted to be connected to a preset power supply; one end of the seventh resistor R7 is connected to one end of the light-receiving part of the third optocoupler IC3, and the other end of the seventh resistor R7 is grounded; the eighth resistor R8 is connected in parallel between the two ends of the light-emitting part of the third optocoupler IC3.

[0071] That is to say, when the light-emitting part of the third optocoupler IC3 receives the wake-up instruction, the third optocoupler IC3 is turned on to provide a current signal to the first controllable switch unit 120; and, when the third optocoupler IC3 is turned on, the input end of the outdoor unit control unit 150 is at a high level, and the outdoor unit control unit 150 can receive a control signal according to the input end of the outdoor unit control unit 150.

[0072] In some embodiments, as Figure 3 shown, the first charging unit 140 includes: a first rectification module 141 and a first electrolytic capacitor E1. Among them, the first end of the first rectification module 141 is adapted to be connected to the neutral line N, and the second end of the first rectification module 141 is connected to the output end of the first controllable switch unit 120; one end of the first electrolytic capacitor E1 is respectively connected to the third end of the first rectification module 141 and the power supply end of the outdoor unit control unit 150, and the other end of the first electrolytic capacitor E1 is respectively connected to the fourth end of the first rectification module 141 and the output end of the outdoor unit control unit 150.

[0073] Specifically, the first rectification module 141 rectifies the power supply to generate direct current to charge the first electrolytic capacitor E1, and the voltage detection value is the voltage across the first electrolytic capacitor E1.

[0074] Optionally, the first rectification module 141 includes four diodes D4-D7. The anode of the fourth diode D4 is connected to the neutral line N, the cathode of the fourth diode D4 is respectively connected to the cathode of the fifth diode D5 and one end of the first electrolytic capacitor E1, the anode of the fifth diode D5 is connected to the output end of the first controllable switch unit 120 through the second thermistor PTC2, the cathode of the sixth diode D6 is connected to the anode of the fourth diode D4, the anode of the sixth diode D6 is connected to the anode of the seventh diode D7, and the cathode of the seventh diode D7 is connected to the anode of the fifth diode D5.

[0075] Further, the voltage detection unit 160 includes a twentieth resistor R20 and a twenty-first resistor R21. One end of the twentieth resistor R20 is connected to one end of the first electrolytic capacitor E1, the other end of the twentieth resistor R20 is respectively connected to one end of the twenty-first resistor R21 and the input end of the outdoor unit control unit 150, and the other end of the twenty-first resistor R21 is connected to the other end of the first electrolytic capacitor E1.

[0076] It should be noted that the second charging unit 210 can adopt the same circuit topology as the first charging unit 140. Further, in order to prevent excessive current in the live wire L from damaging the first charging unit 140 and the second charging unit 210, the outdoor unit control circuit 100 is also provided with a first fuse. One end of the first fuse is connected to the live wire L, and the other end of the first fuse is respectively connected to the input end of the first controllable switch unit 120 and the input end of the third controllable switch unit 170. The indoor unit control circuit 200 is also provided with a second fuse. One end of the second fuse is connected to the live wire L, and the other end of the second fuse is connected to the second charging unit 210.

[0077] In summary, according to the outdoor unit control circuit of the embodiment of the present invention, when the outdoor unit needs to be powered on, the indoor unit sends a wake-up instruction to the first receiving unit. The first receiving unit, the first controllable switch unit, and the second controllable switch unit form a communication loop with the indoor unit, enabling the first controllable switch unit to turn on. After the first controllable switch unit turns on, it provides power to the first charging unit. The first charging unit generates a first power supply based on the power to supply power to the outdoor unit control unit, thereby waking up the outdoor unit. Therefore, the indoor unit only needs to send a wake-up instruction through the first receiving unit to power on and wake up the outdoor unit, without the need to set a relay in the indoor unit to control the power on or off of the outdoor unit, thus reducing the volume of the indoor unit's electronic control, and further reducing the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thereby improving the safety of the indoor unit.

[0078] Corresponding to the above embodiments, the embodiments of the present invention also provide an outdoor unit. As Figure 6 shown, the outdoor unit 300 includes: the outdoor unit control circuit 100 of any of the foregoing embodiments.

[0079] According to the outdoor unit of the embodiment of the present invention, by adopting the above-mentioned outdoor unit control circuit, the first controllable switch unit is arranged in the communication loop between the indoor unit and the outdoor unit. The communication loop is used to turn on the first controllable switch unit to supply power to the outdoor unit. In this way, there is no need to set a relay in the indoor unit to control the power on or off of the outdoor unit, thus reducing the volume of the indoor unit's electronic control, and further reducing the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thereby improving the safety of the indoor unit.

[0080] Corresponding to the above embodiments, the embodiments of the present invention also provide an air conditioner. As Figure 7 shown, the air conditioner 1000 includes: an indoor unit 400 and the aforementioned outdoor unit 300, wherein the indoor unit 300 is adapted to send a wake-up instruction; the outdoor unit 400 is connected to the indoor unit 300, and the outdoor unit 400 is configured to be woken up when receiving the wake-up instruction.

[0081] According to the air conditioner of the embodiment of the present utility model, by adopting the above-mentioned outdoor unit, the first controllable switch unit is arranged in the communication loop between the indoor unit and the outdoor unit. The communication loop is utilized to turn on the first controllable switch unit to supply power to the outdoor unit. In this way, there is no need to set a relay in the indoor unit to control the power-on or power-off of the outdoor unit, thereby reducing the volume of the indoor unit's electronic control, and further reducing the volume of the indoor unit. Moreover, no large current passes through the indoor unit control circuit, thereby improving the safety of the indoor unit.

[0082] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0083] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0084] In addition, the terms "first", "second", etc. used in the embodiments of the present utility model are only for descriptive purposes and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in this embodiment. Thus, the features defined with terms such as "first", "second", etc. in the embodiments of the present utility model can explicitly or implicitly indicate that at least one such feature is included in this embodiment. In the description of the present utility model, the meaning of the word "plural" is at least two or two and more, such as two, three, four, etc., unless otherwise specifically defined in the embodiment.

[0085] In the present utility model, unless otherwise clearly defined or limited in the embodiments, terms such as "installation", "connection", "attachment" and "fixation" appearing in the embodiments shall be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral one. It can be understood that it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the communication inside two components, or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific implementation situations.

[0086] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. An outdoor unit control circuit, characterized in that: include: A first receiving unit, adapted to receive a wake-up instruction sent by the indoor unit; a first controllable switch unit, wherein a first control end of the first controllable switch unit is connected to an output end of the first receiving unit, and an input end of the first controllable switch unit is suitable for connecting to a power supply; a second controllable switch unit, wherein a first input end of the second controllable switch unit is connected to a second control end of the first controllable switch unit, a first output end of the second controllable switch unit is suitable for connecting to the indoor unit, and the second controllable switch unit is configured to establish a communication loop with the first receiving unit, the first controllable switch unit and the indoor unit when the first receiving unit receives the wake-up instruction, so as to turn on the first controllable switch unit; A first charging unit and an outdoor unit control unit, wherein the input end of the first charging unit is connected to the output end of the first controllable switch unit, the output end of the first charging unit is connected to the power supply end of the outdoor unit control unit, and the first charging unit is configured to generate a first power supply according to the power supply when the first controllable switch unit is turned on, and use the first power supply to power the outdoor unit control unit to wake up the outdoor unit.

2. The outdoor unit control circuit according to claim 1, characterized in that: Also includes: a voltage detection unit, adapted to perform voltage detection on the first power supply to obtain a voltage detection value; a third controllable switch unit, one end of the third controllable switch unit being suitable for connecting to the power supply, and the other end of the third controllable switch unit being connected to the input end of the first charging unit; The outdoor unit control unit is connected to the voltage detection unit and the third controllable switch unit, respectively. The outdoor unit control unit is also configured to control the second controllable switch unit to stop transmitting signals to the indoor unit when the voltage detection value is greater than a preset voltage threshold so as to turn off the first controllable switch unit, and control the third controllable switch unit to provide the power to the first charging unit.

3. The outdoor unit control circuit according to claim 2, characterized in that: The second controllable switch unit comprises: a first relay, wherein a first end of the first relay is connected to a second control end of the first controllable switch unit, a second end of the first relay is suitable for connecting to the indoor unit, and a third end of the first relay is suspended, wherein the first end and the second end of the first relay are normally closed contacts; A first driving module, wherein the input end of the first driving module is connected to the first output end of the outdoor unit control unit, the output end of the first driving module is connected to the coil of the first relay, and the first driving module is further configured to drive the first end and the third end of the first relay to be attracted according to a first control signal sent by the outdoor unit control unit, so that the second controllable switch unit stops transmitting signals to the indoor unit.

4. The outdoor unit control circuit according to claim 2, characterized in that: The second controllable switch unit comprises: a first transistor, wherein the collector of the first transistor is connected to the second control end of the first controllable switch unit, the emitter of the first transistor is suitable for connecting to the indoor unit, and the control end of the first transistor has a first node; a first resistor, one end of the first resistor being connected to the first node, and the other end of the first resistor being connected to the output end of the first receiving unit; a second resistor, one end of the second resistor being connected to the first node, and the other end of the second resistor being connected to the emitter of the first transistor; A first photocoupler, wherein one end of the light receiving part of the first photocoupler is connected to the second output end of the outdoor unit control unit, the other end of the light receiving part of the first photocoupler is connected to the third output end of the outdoor unit control unit, and the light emitting part of the first photocoupler is connected in parallel between the two ends of the second resistor.

5. The outdoor unit control circuit according to claim 4, characterized in that: When the second controllable switch unit transmits a signal to the indoor unit, the first photoelectric coupler is disconnected; When the second controllable switch unit stops transmitting a signal to the indoor unit, the first photoelectric coupler is turned on.

6. The outdoor unit control circuit according to claim 2, characterized in that: The third controllable switch unit comprises: a second relay, wherein a first end of the second relay is adapted to be connected to the power source, and a second end of the second relay is connected to an input end of the first charging unit; A second driving module, wherein the input end of the second driving module is connected to the third output end of the outdoor unit control unit, the output end of the second driving module is connected to the coil of the second relay, and the second driving module is configured to drive the first end and the second end of the second relay to be attracted according to a second control signal sent by the outdoor unit control unit to provide the power supply to the first charging unit.

7. The outdoor unit control circuit according to claim 2, characterized in that: Also includes: a first sending unit, wherein an output end of the first sending unit is connected to an output end of the second controllable switch unit, and an input end of the first sending unit is connected to an output end of the first receiving unit; The fourth output end of the outdoor unit control unit is connected to the control end of the first sending unit, and the outdoor unit control unit is also configured to control the first sending unit to send a communication signal to the indoor unit when the second controllable switch unit is controlled to stop transmitting signals to the indoor unit and continue for a first preset time period, so as to put the outdoor unit into a communication state.

8. The outdoor unit control circuit according to claim 7, characterized in that: The first sending unit includes: a second transistor, wherein a control end of the second transistor is connected to the outdoor unit control unit via a third resistor, and an emitter of the second transistor is grounded; a fourth resistor, one end of which is connected to the collector of the second transistor; a fifth resistor, one end of which is suitable for connecting to a preset power supply, and the other end of which is connected to the other end of the fourth resistor; A second photoelectric coupler, one end of the light-emitting part of the second photoelectric coupler is connected to one end of the fourth resistor, the other end of the light-emitting part of the second photoelectric coupler is connected to the other end of the fourth resistor, one end of the light-receiving part of the second photoelectric coupler is connected to the output end of the first receiving unit, and the other end of the light-receiving part of the second photoelectric coupler is suitable for connecting to the outdoor unit.

9. The outdoor unit control circuit according to claim 7, characterized in that: The first receiving unit is also adapted to receive a shutdown instruction sent by the indoor unit; The input end of the outdoor unit control unit is connected to the output end of the first receiving unit, and the outdoor unit control unit is also configured to control the third controllable switch unit to stop providing the power to the first charging unit when the outdoor unit enters a communication state and receives the shutdown command.

10. The outdoor unit control circuit according to any one of claims 1 to 9, characterized in that: The first controllable switch unit includes a solid-state relay.

11. The outdoor unit control circuit according to any one of claims 1 to 9, characterized in that: The first receiving unit comprises: A third photoelectric coupler, wherein one end of the light-emitting portion of the third photoelectric coupler is suitable for connecting to the indoor unit, the other end of the light-emitting portion of the third photoelectric coupler is connected to the first control end of the first controllable switch unit, one end of the light-receiving portion of the third photoelectric coupler is connected to the outdoor unit control unit via a sixth resistor, and the other end of the light-receiving portion of the third photoelectric coupler is suitable for connecting to a preset power supply; a seventh resistor, one end of the seventh resistor being connected to one end of the light receiving portion of the third photoelectric coupler, and the other end of the seventh resistor being grounded; An eighth resistor is connected in parallel between two ends of the light emitting portion of the third photocoupler.

12. The outdoor unit control circuit according to any one of claims 1 to 9, characterized in that: The first charging unit comprises: A first rectifier module, wherein a first end of the first rectifier module is suitable for connecting to a neutral line, and a second end of the first rectifier module is connected to an output end of the first controllable switch unit; A first electrolytic capacitor, one end of the first electrolytic capacitor is respectively connected to the third end of the first rectifier module and the power supply end of the outdoor unit control unit, and the other end of the first electrolytic capacitor is respectively connected to the fourth end of the first rectifier module and the output end of the outdoor unit control unit.

13. An outdoor unit, characterized in that: include: An outdoor unit control circuit according to any one of claims 1 to 12.

14. An air conditioner, characterized in that: include: Indoor unit, the indoor unit is suitable for sending a wake-up command ； The outdoor unit according to claim 13, wherein the outdoor unit is connected to the indoor unit, and the outdoor unit is configured to wake up upon receiving the wake-up instruction.

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