Power supply circuit for indoor and outdoor units of air conditioner, air conditioner, control method, and medium

Abstract

The present application discloses a power supply circuit for indoor and outdoor units of an air conditioner, an air conditioner, a control method, and a medium, said power supply circuit comprising a first power line (100), a second power line (200), a signal line (300), an indoor side circuit (400), and an outdoor side circuit (500). The indoor side circuit (400) comprises an indoor control module (410), an indoor communications module (420), an indoor power supply module (430), and an indoor switching module (440) that is controlled by the indoor control module (410) to close and open. The outdoor side circuit (500) comprises an outdoor control module (510), an outdoor communications module (520), an outdoor power supply module (530) for converting a power supply and storing electrical energy, and an outdoor switching module (540) that is controlled by the outdoor control module (510) to close and open.

Description

Air conditioner internal and external unit power supply circuit, air conditioner, control method and medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202410247673.0 filed on March 5, 2024, entitled “Power supply circuit for indoor and outdoor units of air conditioner, air conditioner, control method and medium”, and application number 202420428202.5 filed on March 5, 2024, entitled “Power supply circuit for indoor and outdoor units of air conditioner and air conditioner”. The entire contents of the above patent applications are incorporated into this application by reference. Technical Field

[0003] The present application relates to the technical field of air conditioning, and in particular to a power supply circuit for indoor and outdoor units of an air conditioner, an air conditioner, a control method, and a medium. Background Art

[0004] At present, the air-conditioning system includes an indoor unit and an outdoor unit. The air-conditioning system is usually connected to the AC mains by the indoor unit, and then the power supply of the outdoor unit is controlled by the relay of the indoor unit. However, since the relay on the indoor side needs to carry the power supply current on the outdoor side, excessive current flowing through it can easily cause damage to the relay. Therefore, in related technologies, multiple relays are usually set on the outdoor unit for standby power supply control to avoid safety problems caused by excessive current carried by the relay. However, this will also lead to an increase in control devices and low reliability.

[0005] Summary of the Invention

[0006] The purpose of the present application is to at least partially solve one of the technical problems existing in the prior art and to provide an air conditioner indoor and outdoor unit power supply circuit, an air conditioner, a control method and a medium.

[0007] In a first aspect, an embodiment of the present application provides a power supply circuit for an indoor and outdoor unit of an air conditioner, comprising:

[0008] First power cord;

[0009] Second power cord;

[0010] signal line;

[0011] An indoor circuit includes an indoor control module, an indoor communication module, an indoor power module, and an indoor switching module whose on / off is controlled by the indoor control module. The indoor control module is respectively connected to the output end of the indoor power module and the indoor communication module. The indoor switching module is used to control the connection between the first power line and the signal line. The first input end of the indoor power module is simultaneously connected to the indoor switching module and the first power line, and the second input end of the indoor power module is connected to the second power line.

[0012] An outdoor circuit includes an outdoor control module, an outdoor communication module, an outdoor power module for converting power and storing electrical energy, and an outdoor switching module whose on / off is controlled by the outdoor control module. The outdoor control module is respectively connected to the outdoor communication module and the outdoor power module. The outdoor communication module is connected to the indoor communication module via the signal line. The outdoor switching module is used to control the connection status between the outdoor power module, the first power line, and the signal line.

[0013] Wherein, the second power line is connected to the outdoor power module and the outdoor communication module at the same time;

[0014] or,

[0015] The second power line is connected to the outdoor power module, and the outdoor communication module is connected to a connection point between the outdoor switching module and the outdoor power module.

[0016] In the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the indoor switching module includes an indoor switching switch and a protective resistor, the first switch contact of the indoor switching switch is connected to the first input end, the second switch contact of the indoor switching switch is connected to the signal line through the protective resistor, and the control contact of the indoor switching switch is connected to the indoor control module.

[0017] In the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the indoor switching module includes a thyristor assembly and a protective resistor, the control electrode of the thyristor assembly is connected to the indoor control module, the first electrode of the thyristor assembly is connected to the first input end, and the second electrode of the thyristor assembly is connected to the signal line through the protective resistor.

[0018] In the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the first power line is the live line, the second power line is the neutral line, the first input end is simultaneously connected to the input contact of the indoor switching module and the first power line, the outdoor switching module includes a normally open switch contact, a normally closed switch contact and a common contact, the normally open switch contact is connected to the first power line, the normally closed switch contact is connected to the signal line, and the common contact is connected to the outdoor power module; the second power line is respectively connected to the second input end and the outdoor power module.

[0019] In the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the first power line is a neutral line, the second power line is a live line, the first input end is simultaneously connected to the input contact of the indoor switching module and the first power line, the outdoor switching module includes a normally open switch contact, a normally closed switch contact and a common contact, the normally open switch contact is connected to the first power line, the normally closed switch contact is connected to the signal line, and the common contact is respectively connected to the outdoor communication module and the outdoor power supply module; the second power line is respectively connected to the second input end and the outdoor power supply module.

[0020] In the power supply circuit for the indoor and outdoor units of the air conditioner provided in the embodiment of the present application, the indoor circuit further includes a power input port for accessing an external AC power supply, and the power input port is respectively connected to the first input end and the second input end.

[0021] In the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the outdoor circuit includes a power adapter for connecting to an external AC power supply, and the power adapter is connected to the first input end through the first power cord and to the second input end through the second power cord.

[0022] In the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the outdoor power supply module includes a rectifier component and an energy storage capacitor connected in parallel, one input end of the rectifier component is connected to the outdoor switching module, and the other input end is connected to the second power line, and the output end of the rectifier component is connected to the outdoor control module through the energy storage capacitor.

[0023] In the power supply circuit for the indoor and outdoor units of the air conditioner provided in the embodiment of the present application, a voltage division detection module for detecting the energy storage voltage of the energy storage capacitor is provided between the outdoor power module and the outdoor control module.

[0024] In a second aspect, an embodiment of the present application provides an air conditioner, comprising the power supply circuit for the indoor and outdoor units of the air conditioner provided in the embodiment of the first aspect above.

[0025] In a third aspect, an embodiment of the present application further provides a method for controlling a power supply circuit for an indoor and outdoor unit of an air conditioner, which is applied to the power supply circuit for the indoor and outdoor unit of an air conditioner as described in the embodiment of the first aspect above or the air conditioner as described in the embodiment of the second aspect above;

[0026] The control method includes:

[0027] In response to a power-on signal, the indoor control module controls the indoor switching module to connect the first power line to the signal line;

[0028] In response to the on-time of the indoor switching module reaching a first preset time, the indoor control module controls the indoor switching module to cut off the connection between the first power line and the signal line, so that the first power line stops supplying power to the outdoor power module through the signal line;

[0029] In response to the outdoor power module meeting the first charging end condition, the outdoor control module controls the outdoor switching module to connect the first power line to the outdoor power module so that power is supplied to the outdoor power module through the first power line and the second power line.

[0030] In the control method of the power supply circuit of the indoor and outdoor units of the air conditioner provided in the embodiment of the present application, the control method further includes:

[0031] In response to the outdoor control module receiving the shutdown signal sent by the indoor control module, the outdoor control module controls the outdoor switching module to cut off the connection between the first power line and the outdoor power module, and to connect the connection between the signal line and the outdoor power module.

[0032] In the control method of the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the first charging end condition is that the working time of the outdoor power supply module being powered on reaches a second preset time.

[0033] In the control method of the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the first preset time length is shorter than the second preset time length.

[0034] In the control method of the power supply circuit of the indoor and outdoor units of an air conditioner provided in an embodiment of the present application, the outdoor power supply module of the power supply circuit of the indoor and outdoor units of the air conditioner includes a rectifier component and an energy storage capacitor connected in parallel, one input end of the rectifier component is connected to the outdoor switching module, and the other input end is connected to the second power line, and the output end of the rectifier component is connected to the outdoor control module through the energy storage capacitor, and the first charging end condition is that the indoor switching module cuts off the connection between the first power line and the signal line, causing the energy storage voltage of the energy storage capacitor to drop.

[0035] In the control method of the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application, the indoor switching module includes an indoor switching switch and a protective resistor, the first switch contact of the indoor switching switch is connected to the first input end, the second switch contact of the indoor switching switch is connected to the signal line through the protective resistor, the control contact of the indoor switching switch is connected to the indoor control module, and the indoor control module controls the conduction of the indoor switching module, including:

[0036] The indoor control module sends a driving PWM signal to the control electrode of the thyristor assembly, wherein the duty cycle of the driving PWM signal is constant or the duty cycle increases gradually.

[0037] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method of the power supply circuit of the indoor and outdoor units of the air conditioner as described in the embodiment of the third aspect above.

[0038] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0040] The present application is further described below with reference to the accompanying drawings and embodiments;

[0041] FIG1 is an optional circuit structure diagram of a power supply circuit for an air conditioner indoor and outdoor unit provided in an embodiment of the present application;

[0042] FIG2 is a schematic diagram of a power supply architecture for powering the indoor and outdoor units of an air conditioner provided by an embodiment of the present application;

[0043] FIG3 is a schematic diagram of a power supply architecture in which the power supply circuits for the indoor and outdoor units of an air conditioner according to an embodiment of the present application provide power supply on the outdoor side;

[0044] FIG4 is another optional circuit structure diagram of the power supply circuit for the indoor and outdoor units of the air conditioner provided in an embodiment of the present application;

[0045] FIG5 is another optional circuit structure diagram of the power supply circuit for the indoor and outdoor units of the air conditioner provided in an embodiment of the present application;

[0046] FIG6 is another optional circuit structure diagram of the power supply circuit for the indoor and outdoor units of the air conditioner provided in an embodiment of the present application;

[0047] FIG7 is a flow chart of a method for controlling power supply circuits of indoor and outdoor units of an air conditioner according to an embodiment of the present application;

[0048] FIG8 is a specific flow chart of the power supply circuits of the indoor and outdoor units of the air conditioner entering the standby mode according to an embodiment of the present application;

[0049] FIG9 is a time sequence diagram of the energy storage voltage of the energy storage capacitor provided in an embodiment of the present application; and

[0050] FIG10 is a timing diagram of the energy storage voltage of the energy storage capacitor provided in another embodiment of the present application. DETAILED DESCRIPTION

[0051] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0052] In the description of this application, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. "at least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0053] It should be noted that the terms "dispose," "install," and "connect" in the embodiments of this application should be interpreted broadly. Those skilled in the art can reasonably determine the specific meanings of these terms in the embodiments of this application based on the specific content of the technical solution. For example, the term "connect" can refer to mechanical connection, electrical connection, or communication; it can refer to direct connection or indirect connection through an intermediary.

[0054] It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0055] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0056] Based on this, the present application provides an air conditioner indoor and outdoor unit power supply circuit, an air conditioner, a control method, and a medium. The indoor circuit can obtain power using a first power line and a second power line. When the indoor switching module is turned on, the first power line can be connected to the signal line. Since the outdoor switching module in the standby state maintains the signal line connected to the outdoor power module, and the second power line also remains connected to the outdoor power module, the signal line and the second power line can be used to transmit electrical energy to the outdoor power module to wake up the outdoor circuit. When the outdoor circuit is powered, the outdoor switching module can conduct the connection between the first power line and the outdoor power module, thereby resuming normal power supply using the first power line and the second power line. Therefore, under normal operating conditions, the indoor power module and the outdoor power module can directly obtain power supply through the first power line and the second power line, and the indoor circuit does not need to carry the load current of the outdoor circuit. At the same time, only one module with a controllable switch function is required in the indoor circuit and the outdoor circuit to realize the standby control, wake-up control and power supply control of the indoor side to the outdoor side, which optimizes the power supply circuit architecture between the indoor unit and the outdoor unit, has a simple structure, simplifies the power supply control, and improves the safety of the power supply control.

[0057] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0058] In the first aspect, the specific circuit structure of the power supply circuit for the indoor and outdoor units of the air conditioner provided in the embodiment of the present application is illustrated by taking the first power line as the neutral line and the second power line as the live line as an example.

[0059] Referring to Figure 1 , which is a diagram illustrating an optional circuit structure of a power supply circuit for an air conditioner indoor and outdoor unit according to an embodiment of the present application, it is understood that the power supply circuit for the air conditioner indoor and outdoor units includes an indoor circuit 400 and an outdoor circuit 500 . The indoor circuit 400 includes an indoor control module 410 , an indoor communication module 420 , an indoor power module 430 , and an indoor switching module 440 . The outdoor circuit 500 includes an outdoor control module 510 , an outdoor communication module 520 , an outdoor power module 530 , and an outdoor switching module 540 . Among them, the first input end of the indoor power supply module 430 is connected to the first power line 100 (i.e., the neutral line), and the second input end of the indoor power supply module 430 is connected to the second power line 200 (i.e., the live line). The indoor power supply module 430 can obtain external AC power through the first power line 100 and the second power line 200, and convert the external AC power into a corresponding DC power supply to supply power to the power load of the indoor side circuit 400 (including the indoor control module 410 and the display module provided in the indoor side circuit 400), wherein the display module can be connected to the indoor control module 410, and the display module can be used to display parameters such as the current operating status of the air conditioner. Specifically, the indoor power supply module 430 includes a rectifier bridge component and an indoor energy storage capacitor connected in parallel. The first input end and the second input end are respectively located on the two bridge arms of the rectifier bridge component, and the two ends of the indoor energy storage capacitor are respectively connected to the indoor control module 410 to supply power to the indoor control module 410. In addition, the indoor power module 430 and the outdoor power module 530 may further include a varistor, a fuse provided on the live wire, and electronic devices for connecting to a common ground wire.

[0060] The indoor control module 410 and the outdoor control module 510 communicate with each other using a current loop communication method. Specifically, the indoor control module 410 is connected to the indoor communication module 420. The indoor communication module 420 includes an indoor transmitting optical coupler 422 and an indoor receiving optical coupler 421. The indoor transmitting optical coupler 422 and the indoor receiving optical coupler 421 are both connected to the indoor control module 410, while the outdoor communication module 520 includes an outdoor transmitting optical coupler 522 and an outdoor receiving optical coupler 521. The outdoor transmitting optical coupler 522 and the outdoor receiving optical coupler 521 are both connected to the outdoor control module. 510 connection, wherein the outdoor transmitting optocoupler 522 can be connected to the indoor receiving optocoupler 421 through the signal line 300, and the indoor transmitting optocoupler 422 is respectively connected to the first power line 100 and the second power line 200. Specifically, the indoor transmitting optocoupler 422 can be directly connected to the outdoor receiving optocoupler 521 through the neutral line, or the indoor transmitting optocoupler 422 can be connected to the outdoor receiving optocoupler 521 through the outdoor switching module 540 when the outdoor switching module 540 conducts the connection between the first power line 100 and the outdoor power module 530.

[0061] As shown in FIG1 , the first power line 100 is the neutral line, the second power line 200 is the live line, and the outdoor switching module 540 is connected to the outdoor control module 510. The outdoor switching module 540 can be controlled by the outdoor control module 510 to connect the first power line 100 to the outdoor power module 530 or to connect the signal line 300 to the outdoor power module 530. Specifically, the indoor transmitting optical coupler 422 can be connected to the outdoor switching module 540 via the first power line 100. At the same time, the outdoor switching module 540 can also be connected to the outdoor receiving optical coupler 521 and the outdoor power module 530. Therefore, when the outdoor switching module 540 connects the first power line 100 to the outdoor power module 530, the indoor communication module 420, the outdoor communication module 520, the signal line 300, the first power line 100 (neutral line), and the outdoor switching module 540 form a current loop communication circuit. Therefore, the outdoor control module 510 and the indoor control module 410 can use the current loop communication circuit for communication control.

[0062] It should be noted that the communication voltage of the current loop communication circuit is provided through the indoor transmitting optocoupler 422, and the first power line 100 and the second power line 200 are connected to the indoor transmitting optocoupler 422 through the power conversion component of the indoor communication module 420. The power provided by the first power line 100 and the second power line 200 can provide the required voltage to the current loop communication circuit after half-wave rectification, voltage division and voltage stabilization by the power conversion component.

[0063] The indoor switching module 440 can be connected to the first power line 100 and the signal line 300 respectively and connected to the indoor control module 410, and the indoor switching module 440 can be controlled by the indoor control module 410 to turn on or off the connection between the first power line 100 and the signal line 300. Therefore, when the indoor switching module 440 is turned on, the first power line 100 and the signal line 300 are turned on, and the electric energy of the first power line 100 can be transmitted to the outdoor circuit 500 through the signal line 300; when the indoor switching module 440 is turned off, the first power line 100 and the signal line 300 are disconnected.

[0064] Referring to Figure 1, the indoor switching module 440 includes an indoor switching switch 441 and a protective resistor 443. The indoor switching switch 441 can be a relay, wherein the control contact of the indoor switching switch 441 is connected to the indoor control module 410, the first switch contact is connected to the first input end of the indoor power supply module 430, that is, the first switch contact is connected to the first power line 100, and the second switch contact is connected to the signal line 300 through the protective resistor 443.

[0065] The protective resistor 443 can be a thermistor, such as a positive temperature coefficient (PTC) thermistor. The protective resistor 443 is used to protect the signal line 300 from excessive current input to the signal line 300, thereby preventing damage to the signal line 300. The resistance value of a PTC thermistor increases stepwise with increasing temperature. Therefore, using a PTC thermistor as the protective resistor 443 can limit the starting current. Therefore, when the indoor switching switch 441 is turned on, that is, the first switch contact and the second switch contact are connected, the first power line 100 is connected to the signal line 300 through the protective resistor 443, which is equivalent to the indoor switching module 440 being turned on.

[0066] It should be noted that a power supply protection resistor can be provided between the signal line 300 and the normally closed switch contacts of the outdoor switching module 540 in the outdoor circuit 500. The power supply protection resistor can be the same as the protection resistor 443, that is, the power supply protection resistor can be a PTC thermistor, which can limit the starting current.

[0067] As shown in Figure 1, the outdoor switching module 540 includes a normally open switch contact, a normally closed switch contact, a common contact and a control contact. The outdoor switching module 540 can switch the common contact and the normally open switch contact to conduction or switch the common contact and the normally closed switch contact to conduction based on the control of the control contact. This is equivalent to the outdoor switching module 540 being controlled by the outdoor control module 510 to conduct the connection between the first power line 100 and the outdoor power supply module 530 or the connection between the signal line 300 and the outdoor power supply module 530.

[0068] Specifically, when the control contacts are not under the corresponding voltage control, the common contacts are connected to the normally closed switch contacts, and when the control contacts are under the corresponding voltage control, the common contacts are connected to the normally open switch contacts. The control contacts of the outdoor switching module 540 are connected to the outdoor control module 510, the normally open switch contacts are connected to the first power line 100, and the normally closed switch contacts are connected to the signal line 300. The common contacts are also connected to the outdoor receiving optical coupler 521 of the outdoor communication module 520 and the outdoor power module 530. Since the outdoor circuit 500 is in standby mode, the outdoor circuit 500 has no power supply, and the normally closed switch contacts of the outdoor switching module 540 are connected to the common contact, that is, the signal line 300 is connected to the outdoor power module 530 through the common contact. At the same time, since the outdoor power module 530 remains connected to the second power line 200, when the indoor control module 410 drives the indoor switching module 440 to turn on, the electric energy of the external AC power supply can be transmitted from the indoor switching module 440 to the signal line 300 through the first power line 100, and transmitted to the outdoor power module 530 through the signal line 300. Therefore, the outdoor power module 530 can obtain the wake-up voltage through the signal line 300 and the second power line 200, and restore the power supply of the outdoor control module 510, that is, wake up the outdoor circuit 500. There is no need for the outdoor circuit 500 to be configured with an additional power supply or the outdoor circuit 500 to be powered in standby mode, thereby achieving low-power standby wake-up.

[0069] When the outdoor control module 510 is powered, the outdoor control module 510 can drive the outdoor switching module 540. At this time, the normally open switch contacts are connected to the common contacts, that is, the first power line 100 (neutral line) can pass through the outdoor switching module 540 and the outdoor power supply module 530. Therefore, the first power line 100 (neutral line) and the second power line 200 (live line) can directly supply power to the outdoor power supply module 530. Therefore, under normal operation, the indoor circuit 400 does not need to carry the load current of the outdoor circuit 500, reducing the occurrence of damage to devices due to long-term carrying of large currents, thereby improving the reliability and safety of power supply control.

[0070] In addition, since the first power line 100 is connected to the common contact, the first power line 100 is the neutral line at this time, that is, the neutral line can also be connected to the outdoor receiving optocoupler 521 at the same time, and the indoor control module 410 can drive the indoor switching module 440 to cut off, that is, the first power line 100 is disconnected from the signal line 300. At this time, the communication function of the current loop communication circuit is restored. Therefore, the power supply circuit for the indoor and outdoor units of the air conditioner provided in the embodiment of the present application optimizes the power supply architecture of the indoor and outdoor units of the air conditioner, and uses the current loop communication circuit used for communication between the indoor unit and the outdoor unit to provide wake-up power to the outdoor circuit 500. In the wake-up stage, the indoor switching module 440 and the outdoor switching module 540 are switched so that the signal line 300 replaces the first power line 100 to assume the power supply function, and in the normal operation stage, the communication function of the signal line 300 is restored by switching the indoor switching module 440 and the outdoor switching module 540, thereby achieving the effect of multiplexing the neutral line of the signal line 300 and simplifying the power supply control. Only by adding modules or components with corresponding switching functions to the indoor circuit 400 and the outdoor circuit 500 respectively, the wake-up and power supply control can be realized. The control logic is simple, the safety of the power supply control is improved, and the circuit layout of the indoor circuit 400 and the outdoor circuit 500 can be balanced.

[0071] It can be understood that the outdoor power supply module 530 also includes a rectifier component 531 and a parallel energy storage capacitor 532. The rectifier component 531 includes two input terminals respectively located on the bridge arms of the rectifier bridge, one input terminal is connected to the common contact, and the other input terminal is connected to the second power line 200, and the output terminal of the rectifier component 531 is connected to the outdoor control module 510, wherein the energy storage capacitor 532 is located between the rectifier component 531 and the outdoor control module 510, so that when the power rectified by the rectifier component 531 is provided to the outdoor control module 510, the energy storage capacitor 532 can store part of the electrical energy. When the indoor switching module 440 is cut off, that is, when the signal line 300 stops the power supply function, the energy storage capacitor 532 can release electrical energy to maintain the outdoor control module 510 to drive the outdoor switching module 540, switching the normally open switch contacts to connect with the common contacts to restore the power supply of the outdoor circuit 500.

[0072] It will be appreciated that the outdoor circuit 500 further includes a voltage-dividing detection module 550, which is disposed between the outdoor control module 510 and the outdoor power module 530. The voltage-dividing detection module 550 is configured to detect the stored voltage of the energy storage capacitor 532 in the outdoor power module 530 to determine whether the energy storage capacitor 532 stores sufficient buffer power to support the outdoor control module 510 in switching the outdoor switching module 540. The voltage-dividing detection module 550 includes two voltage-dividing resistors connected in series, and the detection point between the voltage-dividing resistors is connected to the outdoor control module 510.

[0073] It can be understood that the first power cord 100 and the second power cord 200 can respectively include two connection ports, so that the first power cord 100 can be simultaneously connected to the first input end of the indoor power module 430 and the outdoor power module 530, and the second power cord 200 can be simultaneously connected to the second input end of the indoor power module 430 and the normally open switch contact of the outdoor switching module 540.

[0074] 2 , which is a schematic diagram of a power supply architecture for powering the indoor and outdoor unit power supply circuits of an air conditioner provided in an embodiment of the present application.

[0075] It is understood that when the power supply side of the air conditioner is indoors, the indoor circuit 400 further includes a power input port for accessing an external AC power source. The power input port is simultaneously connected to the first input terminal and the second input terminal of the indoor power module 430. Specifically, the first input terminal is connected to the power input port via a first power line 100, and the second input terminal is connected to the power input port via a second power line 200. In addition, the power input port can also be connected to the outdoor power module 530 via the second power line 200, and can be connected to the outdoor switching module 540 via the first power line 100. Specifically, the power input port can be connected to the normally open switch contact of the outdoor switching module 540 via the first power line 100.

[0076] When the outdoor switching module 540 conducts the connection between the first power line 100 and the outdoor power module 540, that is, the common contact is connected to the normally open switch contact, the outdoor power module 530 can directly obtain external AC power through the first power line 100 and the second power line 200. Therefore, under normal operation, the electronic components of the indoor circuit 400 do not need to carry the load current of the outdoor unit, and the electronic components of the outdoor circuit 500 do not need to carry the load current of the indoor unit, thereby reducing the occurrence of damage to the components due to excessive current.

[0077] It should be noted that the power supply circuit of the indoor and outdoor units of the air conditioner can also include a heat exchanger part, namely an indoor heat exchanger and an outdoor heat exchanger, wherein the heat exchanger part can be connected to the power common ground wire PE, wherein the power common ground wire PE can be connected to the control module, namely the corresponding indoor control module 410 and outdoor control module 510.

[0078] Accordingly, referring to FIG3 , FIG3 is a schematic diagram of a power supply architecture for an air conditioner indoor and outdoor unit power supply circuit provided in an embodiment of the present application, wherein power is supplied outdoors. When the power supply side of the air conditioner is outdoors, the outdoor circuit 500 further includes a power adapter, which is used to connect to an external AC power source and output two power supplies, one to the indoor power module 430 and the other to the outdoor power module 530. Specifically, the power adapter is connected to the first input terminal and the normally open switch contact via a first power line 100, and is connected to the second input terminal and the outdoor power module 530 via a second power line 200.

[0079] Therefore, when the common contact of the outdoor switching module 540 is connected to the normally open switch contact, the outdoor power supply module 530 can directly obtain external AC power through the first power line 100 and the second power line 200, without the indoor circuit 400 carrying the load current on the outdoor side. At the same time, since the indoor power supply module 430 can remain connected to the first power line 100 and the second power line 200, the indoor power supply module 430 can directly obtain external AC power, and there is no need for the outdoor circuit 500 to carry the load current on the indoor side, which can reduce the situation where the device is damaged due to carrying excessive current on both the indoor and outdoor sides at the same time.

[0080] Referring to Figure 4 , which illustrates an alternative circuit structure for the power supply circuit for the indoor and outdoor units of an air conditioner according to an embodiment of the present application, it is understood that the indoor switching module 440 includes a thyristor assembly 442 and a protective resistor 443 . The control electrode of the thyristor assembly 442 is connected to the indoor control module 410 , the first electrode is connected to the first input terminal of the indoor power module 430 , and thus the first electrode serves as an input contact of the indoor switching module 440 and is connected to the first power line 100 . The second electrode is connected to the signal line 300 via the protective resistor 443 .

[0081] The protective resistor 443 can be a thermistor, such as a positive temperature coefficient (PTC) thermistor. The protective resistor 443 is used to protect the signal line 300 from excessive current input to the signal line 300, thereby preventing damage to the signal line 300. The resistance value of a PTC thermistor increases stepwise with increasing temperature. Therefore, using a PTC thermistor as the protective resistor 443 can limit the starting current. Therefore, when the indoor switching switch 441 is turned on, that is, the first and second poles are connected, the first power line 100 is connected to the signal line 300 through the protective resistor 443, which is equivalent to the indoor switching module 440 being turned on and the input contacts being connected to the output contacts. Furthermore, the thyristor assembly 442 can include a thyristor assembly and a triode, wherein the base of the triode is connected to the indoor control module 410, the emitter is grounded, and the collector is connected to the thyristor assembly. Therefore, when the base of the triode receives a PWM drive signal from the indoor control module 410, the triode is turned on simultaneously with the thyristor assembly 442, i.e., the indoor switching module 440 is turned on. It should be noted that the indoor control module 410 can provide a PWM drive signal with a constant duty cycle to the base of the triode, or a PWM drive signal with a gradually increasing duty cycle, to achieve a soft switching effect and suppress startup current.

[0082] The following uses the first power line 100 as the live line and the second power line 200 as the neutral line as an example to illustrate the specific circuit structure of the power supply circuit for the indoor and outdoor units of the air conditioner provided in the embodiment of the present application.

[0083] 5 , which is a diagram of an optional circuit structure of a power supply circuit for an air conditioner indoor and outdoor unit according to an embodiment of the present application.

[0084] It is understandable that the first input end of the indoor power module 430 is connected to the first power line 100 (i.e., the live wire), and the second input end is connected to the second power line 200 (i.e., the neutral wire), and the indoor power module 430 can obtain external AC power through the neutral wire and the live wire. The indoor transmitting optocoupler 422 of the indoor communication module 420 is directly connected to the outdoor receiving optocoupler 521 of the outdoor communication module 520 through the second power line 200 (i.e., the neutral wire), and the indoor receiving optocoupler 421 of the indoor communication module 420 is directly connected to the outdoor transmitting optocoupler 522 of the outdoor communication module 520 through the signal line 300. At this time, the indoor communication module 420, the outdoor communication module 520, the second power line 200 and the signal line 300 form a current loop communication circuit, and the outdoor control module 510 and the indoor control module 410 can communicate through the current loop communication circuit. Among them, the communication voltage of the current loop communication circuit is provided by the indoor transmitting optocoupler 422, and the first power line 100 and the second power line 200 are connected to the indoor transmitting optocoupler 422 through the power conversion component of the indoor communication module 420. The power provided by the first power line 100 and the second power line 200 can provide the required voltage to the current loop communication circuit after half-wave rectification, voltage division and voltage stabilization of the power conversion component.

[0085] It can be understood that the wiring method of the indoor switching module 440 has not changed. The indoor switching module 440 is respectively connected to the first power line 100 and the signal line 300, but the first power line 100 at this time is the live line, that is, the indoor switching module 440 is connected to the live line; therefore, when the indoor switching module 440 is turned on, the first power line 100 (that is, the live line) is connected to the signal line 300, and the electric energy of the first power line 100 can be transmitted to the outdoor circuit 500 through the signal line 300. At this time, the signal line 300 assumes the power supply function of the live line; when the indoor switching module 440 is cut off, the first power line 100 (that is, the live line) is disconnected from the signal line 300. At this time, the signal line 300 can be restored to the signal transmission function of the current loop communication circuit.

[0086] It should be noted that, since the first power line 100 (i.e., the live wire) is reused with the signal line 300 at this time, and the indoor switching module 440 is used to realize that the signal line 300 replaces the first power line 100 to assume the power supply function, and the power line that the outdoor power module 530 maintains to be connected to is the neutral line, i.e., the second power line 200, it is possible to avoid the outdoor power module 530 from being connected to the live wire for a long time, reducing the loss of electronic devices due to a live power line, and improving the safety of power supply. The embodiment of the present application provides an air conditioner indoor and outdoor unit power supply circuit that uses the live wire and the signal line 300 to reuse, which can reduce the pre-charge current of the busbar (i.e., the live wire) of the outdoor circuit 500, and can also cut off the live wire when the outdoor circuit 500 is in standby mode, thereby improving the safety of standby mode.

[0087] 5 , the indoor switching module 440 includes an indoor switching switch 441 and a protective resistor 443. The indoor switching switch 441 includes a first switch contact, a second switch contact and a control contact. Specifically, the control contact is connected to the indoor control module 410, the first switch contact is connected to the first input end of the indoor power module 430, that is, connected to the first power line 100 (that is, the live wire), and the second switch contact is connected to the signal line 300 through the protective resistor 443. The protective resistor 443 can be a thermistor. Therefore, when the indoor switching switch 441 is turned on, that is, the first switch contact and the second switch contact are turned on, the first power line 100 is connected to the signal line 300 through the protective resistor 443, which is equivalent to the indoor switching module 440 being turned on.

[0088] As shown in Figure 5, the control contacts of the outdoor switching module 540 are connected to the outdoor control module 510, the normally open switch contacts are connected to the first power line 100, i.e., the live wire, the normally closed switch contacts are connected to the signal line 300, the common contacts are only connected to the outdoor power module 530, and the second power line 200, i.e., the neutral wire, is simultaneously connected to the outdoor receiving optocoupler 521 of the outdoor communication module 520 and the outdoor power module 530. Since the outdoor circuit 500 is in standby mode, the outdoor circuit 500 has no power supply, and the normally closed switch contact of the outdoor switching module 540 is connected to the common contact, that is, the signal line 300 is connected to the outdoor power module 530 through the common contact. At the same time, since the outdoor power module 530 remains connected to the second power line 200, that is, the neutral line, therefore, when the indoor control module 410 drives the indoor switching module 440 to turn on, the electric energy of the external AC power supply can be transmitted from the indoor switching module 440 to the signal line 300 through the first power line 100, and transmitted to the outdoor power module 530 through the signal line 300. Therefore, the outdoor power module 530 can obtain the wake-up voltage through the signal line 300 and the second power line 200, and restore the power supply of the outdoor control module 510, that is, wake up the outdoor circuit 500. There is no need for the outdoor circuit 500 to be configured with an additional power supply or the outdoor circuit 500 to be powered in standby mode, thereby achieving low-power standby wake-up.

[0089] When the outdoor control module 510 is powered, the outdoor control module 510 can drive the outdoor switching module 540. At this time, the normally open switch contacts are connected to the common contacts, that is, the first power line 100 (live wire) can be connected to the outdoor power supply module 530 through the outdoor switching module 540. Therefore, the first power line 100 (live wire) and the second power line 200 (neutral wire) can directly supply power to the outdoor power supply module 530. Therefore, under normal operation, the indoor circuit 400 does not need to carry the load current of the outdoor circuit 500, thereby reducing the occurrence of damage to devices due to long-term carrying of large currents, and improving the reliability and safety of power supply control.

[0090] The indoor control module 410 can drive the indoor switching module 440 to cut off, that is, the first power line 100 is disconnected from the signal line 300, at which point the communication function of the current loop communication circuit is restored. Therefore, the air conditioner indoor and outdoor unit power supply circuit provided in the embodiment of the present application optimizes the power supply architecture of the air conditioner indoor and outdoor units, and uses the current loop communication circuit used for communication between the indoor and outdoor units to provide wake-up power to the outdoor circuit 500. During the wake-up phase, by switching the indoor switching module 440 and the outdoor switching module 540, the signal line 300 replaces the first power line 100 (live wire) to assume the power supply function. During the normal operation phase, by switching the indoor switching module 440 and the outdoor switching module 540, the communication function of the signal line 300 is restored, achieving the effect of multiplexing the live wire for the signal line 300, simplifying the power supply control. Only by adding modules or components with corresponding switching functions to the indoor circuit 400 and the outdoor circuit 500, respectively, can wake-up and power supply control be achieved. The control logic is simple, the security of the power supply control is improved, and the circuit layout of the indoor circuit 400 and the outdoor circuit 500 can be balanced.

[0091] Referring to Figure 6, Figure 6 is an optional circuit structure diagram of the power supply circuit of the indoor and outdoor units of the air conditioner provided in an embodiment of the present application. The indoor switching module 440 includes a thyristor assembly 442 and a protective resistor 443, wherein the control electrode of the thyristor assembly 442 is connected to the indoor control module 410, the first electrode is connected to the first input end of the indoor power module 430, that is, the first electrode is connected to the first power line 100, and the second electrode is connected to the signal line 300 through the protective resistor 443. The protective resistor 443 can be a thermistor. Therefore, when the indoor switching switch 441 is turned on, that is, the first electrode and the second electrode are turned on, the first power line 100 is connected to the signal line 300 through the protective resistor 443, which is equivalent to the indoor switching module 440 being turned on.

[0092] The power supply control logic of the power supply circuit of the indoor and outdoor units of the air conditioner provided in the embodiments of the present application is described below.

[0093] As shown in Figure 1, when the air conditioner is in standby mode, the indoor power supply module 430 can directly obtain external AC power through the first power line 100 and the second power line 200 and convert it into corresponding DC power to provide to the power load of the indoor circuit 400. That is, the indoor circuit 400 can be awakened based on the wake-up signal. When the outdoor switching module 540 is not driven and controlled, the outdoor switching module 540 can maintain the connection between the conductive signal line 300 and the outdoor power supply module 530. At this time, the first power line 100 cannot be connected to the outdoor power supply module 530. At this time, the outdoor circuit 500 cannot normally obtain power. That is, when the air conditioner is in standby mode, the outdoor circuit 500 is completely powered off, achieving low-power standby mode. When it is necessary to wake up the outdoor circuit 500, the indoor control module 410 can be used to drive the indoor switching module 440 to turn on. Specifically, as shown in Figure 1, the indoor control module 410 can send a corresponding level signal to the indoor switching switch 441, so that the first switch contact and the second switch contact of the indoor switching switch 441 are turned on, thereby realizing the conduction of the first power line 100 and the signal line 300; in addition, as shown in Figure 4, when the air conditioner needs to wake up the outdoor circuit 500, the indoor control module 410 can send a PWM drive signal to the thyristor assembly 442, so that the thyristor assembly 442 is turned on, that is, the first power line 100 and the signal line 300 are turned on.

[0094] When the outdoor switching module 540 connects the signal line 300 to the outdoor power module 530, the external AC power source can transmit power to the outdoor power module 530 via the signal line 300, thereby powering the outdoor circuit 500. After the outdoor control module 510 is powered, it can drive the outdoor switching module 540 to connect the first power line 100 to the outdoor power module 530 and disconnect the signal line 300 from the outdoor power module 530. At this time, the first power line 100 can be connected to the outdoor power module 530 via the outdoor switching module 540, without the need to use the signal line 300 to supply power to the outdoor power module 530. At the same time, the indoor switching module 440 can be disconnected and restored to normal operation, that is, the signal line 300 resumes its communication transmission function. If shutdown is required, the outdoor control module 510 can drive the outdoor switching module 540 to connect the signal line 300 to the outdoor power module 530. At this time, the outdoor power module 530 disconnects the outdoor power module 530 from the first power line 100 (neutral line), and the outdoor circuit 500 is powered off and put into standby mode. Therefore, the indoor switching module 440 and the outdoor switching module 540 can be used to implement wake-up, standby, and power supply control for the outdoor circuit 500.

[0095] As shown in Figure 5, when the air conditioner is on standby, that is, the outdoor power module 530 is connected to the signal line 300, and the first power line 100 (live wire) cannot be connected to the outdoor power module 530 through the outdoor switching module 540. Therefore, when the air conditioner is on standby, the outdoor circuit 500 cannot obtain power through the first power line 100 and the second power line 200, that is, the outdoor circuit 500 is powered off. When the outdoor circuit 500 needs to be awakened, the indoor control module 410 can similarly be used to drive the indoor switching module 440 to conduct. Specifically, as shown in FIG5 , the indoor control module 410 can send a corresponding level signal to the indoor switching switch 441, causing the first switch contact and the second switch contact of the indoor switching switch 441 to conduct, thereby achieving conduction between the first power line 100 (live wire) and the signal line 300. Furthermore, as shown in FIG6 , when the air conditioner needs to awaken the outdoor circuit 500, the indoor control module 410 can send a PWM drive signal to the thyristor assembly 442, causing the thyristor assembly 442 to conduct, thereby achieving conduction between the first power line 100 (live wire) and the signal line 300. Therefore, the external AC power supply can use the signal line 300 as the live wire to transmit power to the outdoor power module 530, thereby powering the outdoor circuit 500. After the outdoor control module 510 receives power, it can drive the outdoor switching module 540 to connect the first power line 100 to the outdoor power module 530. At this point, the first power line 100 can be connected to the outdoor power module 530 via the outdoor switching module 540, eliminating the need to use the signal line 300 to supply power to the outdoor power module 530. Simultaneously, the indoor switching module 440 can be disconnected, restoring normal operation, meaning that the signal line 300 resumes its communication transmission function. If shutdown is required, the outdoor control module 510 can drive the outdoor switching module 540 to connect the signal line 300 to the outdoor power module 530. At this point, the outdoor power module 530 disconnects from the first power line 100 (live wire), and the outdoor circuit 500 is powered off and enters standby mode. Therefore, the indoor switching module 440 and the outdoor switching module 540 can be used to control the outdoor circuit 500's wakeup, standby mode, and power supply.

[0096] In a second aspect, embodiments of the present application further provide an air conditioner comprising the power supply circuit for the indoor and outdoor units of the air conditioner as described in the above-described embodiments. The indoor circuit 400 of the air conditioner can obtain power using a first power line 100 and a second power line 200. The indoor switching module 440 can connect the first power line 100 to the signal line 300. Since the outdoor switching module 540 maintains a connection between the signal line 300 and the outdoor power module 530 in standby mode, and the second power line 200 also remains connected to the outdoor power module 530, power can be transmitted to the outdoor power module 530 via the signal line 300 and the second power line 200 to wake up the outdoor circuit 500. When the outdoor circuit 500 receives power, the outdoor switching module 540 connects the first power line 100 and the outdoor power module 530, resuming normal power supply using the first power line 100 and the second power line 200.

[0097] In a third aspect, referring to FIG. 7 , FIG. 7 is a flow chart of a method for controlling a power supply circuit for an air conditioner indoor and outdoor unit according to an embodiment of the present application. The method for controlling a power supply circuit for an air conditioner indoor and outdoor unit can be applied to the power supply circuit for the air conditioner indoor and outdoor unit or the air conditioner described above. The method includes but is not limited to the following steps:

[0098] Step S710: In response to the power-on signal, the indoor control module controls the indoor switching module to connect the first power line and the signal line;

[0099] Step S720: In response to the on-time of the indoor switching module reaching a first preset time, the indoor control module controls the indoor switching module to cut off the connection between the first power line and the signal line;

[0100] Step S730: In response to the outdoor power module meeting the first charging end condition, the outdoor control module controls the outdoor switching module to connect the first power line to the outdoor power module.

[0101] It can be understood that when the power supply circuit of the indoor and outdoor units of the air conditioner is in standby mode, the indoor control module 410 of the indoor circuit 400 receives a power-on signal, and the indoor control module 410 can control the indoor switching module 430 to connect the first output end and the signal line 300, so that the first power line 100 is connected to the signal line 300, and the electric energy of the first power line 100 can be transmitted to the outdoor switching module 530 of the outdoor circuit 500 through the signal line 300, and transmitted to the outdoor power module 540, thereby realizing power supply to the outdoor circuit 500 and waking up the outdoor circuit 500.

[0102] It should be noted that since the indoor power module 440 of the indoor side circuit 400 remains connected to the first power line 100 and the second power line 200, the indoor power module 440 can supply power to the indoor control module 410 to maintain the indoor control module 410 in a low-power working mode such as standby mode or sleep mode. Therefore, when the indoor control module 410 receives a power-on signal, it can switch from a low-power working mode such as standby mode or sleep mode to a normal working mode, and control the corresponding power load in the indoor side circuit 400 to wake up the indoor side circuit 400 for normal operation.

[0103] Specifically, as shown in Figure 1, the indoor switching module 440 may include an indoor switching switch 441 and a protective resistor 443. The indoor switching switch 441 may be a relay, wherein the control contact of the indoor switching switch 441 is connected to the indoor control module 410, the first switch contact is connected to the first input end, that is, connected to the first power line 100, and the second switch contact is connected to the signal line 300 through the protective resistor 443. Therefore, the indoor control module 410 can send a conduction signal to the control contact of the indoor switching switch 441 to conduct the first switch contact of the indoor switching switch 441 to the second switch contact, so that the first power line 100 is connected to the signal line 300 through the protective resistor 443, which is equivalent to the indoor switching module 440 being turned on, and then the electric energy of the first power line 100 can be transmitted to the outdoor power module 530 via the signal line 300. The indoor control module 410 can send a cut-off signal to the control contact of the indoor switching switch 441 to disconnect the first switch contact of the indoor switching switch 441 from the second switch contact, thereby disconnecting the first power line 100 from the signal line 300, which is equivalent to stopping power supply to the outdoor circuit 500 through the signal 300.

[0104] Specifically, as shown in FIG4 , the indoor switching module 440 may include a thyristor assembly 442 and a protective resistor 443. The control electrode of the thyristor assembly 442 is connected to the indoor control module 410, with the first electrode connected to the first input terminal, i.e., the first power line 100, and the second electrode connected to the signal line 300 via the protective resistor 443. Therefore, the indoor control module 410 can continuously send a drive PWM signal to the control electrode of the thyristor assembly 442, causing the first electrode and the second electrode of the thyristor assembly 442 to conduct, thereby conducting the first power line 100 and the signal line 300. Furthermore, the power from the first power line 100 can be transmitted to the outdoor power module 530 via the signal line 300. The indoor control module 410 can then stop sending the PWM drive signal to the control electrode of the thyristor assembly 442, disconnecting the first electrode and the second electrode of the thyristor assembly 442. This disconnects the first power line 100 from the signal line 300, effectively ceasing power supply to the outdoor circuit 500 via the signal line 300. The duty cycle of the driving PWM signal is constant or gradually increases, thereby suppressing the starting current of the thyristor component 442 and achieving the effect of soft switching.

[0105] When the indoor switching module 440 is turned on, the outdoor circuit 500 can obtain power through the signal line 300 and the second power line 200. Since the signal line 300 is used as the power line for power supply at this time, the indoor circuit 400 and the outdoor circuit 500 do not establish current loop communication and cannot communicate. Therefore, when the on-time of the indoor switching module 440 reaches the first preset time, it can be considered that the outdoor circuit 500 has obtained sufficient power supply voltage to wake up the outdoor control module 510, that is, the outdoor control module 510 can control the outdoor switching module 540 to turn on the connection between the first power line 100 and the outdoor power module 530, which is equivalent to the outdoor circuit 500 being able to resume using the first power line 100 and the second power line 200 for power supply, without the need for the signal line 300 to assume the power supply function. Therefore, the indoor control module 410 can control the indoor The internal switching module 440 is cut off, that is, the connection between the first power line 100 and the signal line 300 is stopped, and the communication function of the signal line 300 is restored. Specifically, as shown in Figure 5, the first power line 100 is the live wire. When the indoor control module 410 controls the indoor switching module 440 to disconnect the first power line 100 from the signal line 300, the indoor communication module 420 and the outdoor communication module 520 form a current loop communication circuit through the signal line 300 and the second power line 200, so that the indoor control module 410 can communicate and control with the outdoor control module 510.

[0106] It should be noted that the first preset time length can be based on the time length required for the outdoor control module 510 to enter the normal working mode after being awakened by power and to switch the function of the outdoor switching module 540. The first preset time length can also be determined based on parameters such as the input voltage of the input contacts of the indoor switching module 440 and the resistance value of the protection resistor. Specifically, a bus capacitor is also provided between the first power line 100 and the second power line 200, and the protection resistor is a PTC thermistor. The first preset time length can be obtained based on the input voltage of the input contact, the resistance value of the protection resistor at normal temperature, and the capacity of the bus capacitor.

[0107] It should be noted that the outdoor power supply module 530 also includes a rectifier component 531 and a parallel energy storage capacitor 532. The energy storage capacitor 532 can store part of the electrical energy. When the indoor switching module 440 is cut off, that is, the signal line 300 stops the power supply function, the energy storage capacitor 532 can release electrical energy to maintain the outdoor control module 510 to drive the outdoor switching module 540, switching the normally open switch contacts to the common contacts to restore the power supply of the outdoor circuit 500, that is, the first preset time length can refer to the charging time length for the energy storage voltage of the energy storage capacitor 532 to reach the peak value.

[0108] When the outdoor power supply module 530 meets the first charging end condition, it means that the outdoor control module 510 has entered the normal working mode, and can control the outdoor switching module 540 to conduct the connection between the first power line 100 and the outdoor power supply module 530, which is equivalent to controlling the signal line 300 to be disconnected from the outdoor power supply module 530, and controlling the second power line 200 to be connected to the outdoor power supply module 530, so that the outdoor power supply module 530 can obtain power through the first power line 100 and the second power line 200. At this time, the outdoor circuit 500 resumes normal power supply. Therefore, under normal working conditions, the indoor circuit 400 does not need to carry the load current of the outdoor circuit 500, and the outdoor circuit 500 does not need to carry the load current of the indoor circuit 400.

[0109] Specifically, as shown in Figure 1, when the outdoor switching module 540 turns on the connection between the first power line 100 and the outdoor power module 530, and the indoor switching module 440 is cut off, the first power line 100 is disconnected from the signal line 300, and the signal line 300 no longer assumes the power supply function. At this time, the first power line 100, that is, the neutral line, is connected to the outdoor communication module 520 through a common contact. Therefore, the communication function of the signal line 300 can be restored, and the indoor communication module 420 and the outdoor communication module 520 form a current loop communication circuit through the signal line 300 and the first power line 100, so that the indoor control module 410 can communicate and control with the outdoor control module 510.

[0110] It should be noted that the first charging end condition may refer to the working time of the outdoor power supply module 530 after being powered on reaching a second preset time, and the second preset time may refer to the time it takes for the outdoor control module 510 to enter the normal working mode after being powered on, or the time it takes for the outdoor control module 510 to be powered on to switch the common contacts of the outdoor switching module 540 to the normally open switch contacts.

[0111] It should be noted that the first charging end condition can also be that the energy storage voltage of the energy storage capacitor 532 reaches the peak voltage. Specifically, when the energy storage voltage reaches the peak voltage, it can be considered that the energy storage capacitor 532 has stored sufficient electrical energy for the outdoor switching module 540 to maintain working power when switching the outdoor switching module 540, thereby avoiding the outdoor switching module 540 from powering off and shutting down.

[0112] It should be noted that the first preset time length may be less than the second preset time length. When the indoor control module 410 controls the indoor switching module 440 to connect the first power line 100 and the signal line 300, the connection time length of the indoor switching module 440 starts to count. At the same time, since the first power line 100 uses the signal line 300 to supply power to the outdoor power module 530, the outdoor power module 530 is powered and works, and the working time length of the outdoor power module 530 also starts to count synchronously. Since the first preset time length is less than the second preset time length, the indoor control module 410 controls the indoor switching module 440 to cut off the connection between the first power line 100 and the signal line 300 before the outdoor control module 510 controls the outdoor switching module 540 to connect the first power line 100 and the outdoor power module 530, thereby avoiding the first power line 100 remaining connected to the signal line 300 and causing power loss, while protecting the indoor communication module 420 and the outdoor communication module 520.

[0113] It is understandable that the first charging end condition can also be that the indoor switching module 440 cuts off the connection between the first power line 100 and the signal line 300, causing the energy storage voltage of the energy storage capacitor 532 to drop. This is equivalent to when the energy storage voltage change trend of the energy storage capacitor 532 is a downward trend, indicating that the signal line 300 stops supplying power to the outdoor power module 530, that is, the indoor switching module 440 has been cut off, which is equivalent to considering that the outdoor side circuit 500 has met the conditions for switching to use the first power line 100 and the second power line 200 for power supply. At this time, since the first power line 100 cannot supply power to the outdoor power module 530 through the signal line 300, nor can it supply power to the outdoor power module 530 directly, the energy storage capacitor 532 in the outdoor power module 530 discharges to provide power to the outdoor control module 510 to ensure that the outdoor control module 510 can control the outdoor switching module 540. At this time, the energy storage voltage of the energy storage capacitor 532 drops, and the outdoor control module 510 needs to switch the outdoor switching module 540 and use the first power line 100 and the second power line 200 to restore power supply.

[0114] 8 , which is a specific flow chart of the power supply circuits of the air conditioner indoor and outdoor units entering the standby mode according to an embodiment of the present application, the control method further includes but is not limited to the following steps:

[0115] Step S810: In response to the outdoor control module receiving the shutdown signal sent by the indoor control module, the outdoor control module controls the outdoor switching module to cut off the connection between the first power line and the outdoor power module, and to connect the signal line to the outdoor power module.

[0116] It can be understood that the indoor control module 410 can communicate with the outdoor control module 510 through the current loop communication circuit and send a shutdown signal so that the outdoor control module 510 controls the power load of the outdoor circuit 500 to shut down. Specifically, when the outdoor control module 510 receives the shutdown signal, the outdoor control module 510 can control the outdoor switching module 540 to cut off the connection between the first power line 100 and the outdoor power module 530, and connect the connection between the signal line 300 and the outdoor power module 530, which is equivalent to the common contact of the outdoor switching module 540 and the normally open switch. The off contacts are disconnected, that is, the common contacts and the normally closed switch contacts are turned on. At this time, the common contacts of the outdoor switching module 540 are connected to the signal line 300, and the first power line 100 is disconnected from the outdoor power module 530, which is equivalent to the outdoor circuit 500 being powered off at this time; and when the outdoor circuit 500 needs to be awakened, only the indoor switching module 440 needs to connect the first power line 100 to the signal line 300, and use the signal line 300 and the second power line 200 to supply power to the outdoor power module 530, so as to wake up the outdoor circuit 500, thereby reducing the power consumption of the air conditioner in standby mode.

[0117] Referring to Figure 9, Figure 9 is a time-series diagram of the energy storage voltage of the energy storage capacitor provided by an embodiment of the present application. As shown in Figure 9, during the time period from time T0 to time T1, the indoor switching module 440 receives a low-level signal from the indoor control module 410, thereby switching to the conductive state, i.e., the connection between the signal line 300 and the first power line 100 is conductive, while the outdoor switching module 540 maintains the connection between the signal line 300 and the outdoor power module 530 (assuming that the control end of the outdoor switching module 540 as shown in Figure 9 is at a high level). At this time, the first power line 100 cannot be directly connected to the outdoor power module 410, but instead uses the communication line 300 to supply power to the outdoor power module 410, and the energy storage voltage of the energy storage capacitor shows an upward trend. During the time period from time T1 to time T3, the indoor switching module 440 maintains the connection between the first power line 100 and the signal line 300, and the outdoor switching module 540 also maintains the connection between the signal line 300 and the outdoor power module 530. Therefore, the energy storage voltage of the energy storage capacitor continues to rise until it reaches the peak voltage of the energy storage capacitor (the voltage value corresponding to time T2 as shown in Figure 9). When the conduction time of the indoor switching module 440 reaches the first preset time, that is, the time between time TO and time T3, the indoor control module 410 can send a high-level signal to the indoor switching module 440 to control the indoor switching module 440 to cut off the connection between the signal line 300 and the first power line 100. At this time, the first power line 100 stops occupying the signal line 300 and cannot supply power to the outdoor power module 530 through the signal line 300. However, the outdoor power module 530 does not meet the first charging end condition (the working time of the outdoor power module 530 reaches the second preset time or the indoor switching module 440 cuts off the connection between the first power line 100 and the signal line 300 without causing the energy storage voltage of the energy storage capacitor 532 to drop). Therefore, the outdoor switching module 540 still maintains the signal line 3 00 and the outdoor power supply module 530 are connected, thereby causing the energy storage capacitor 532 to discharge, causing the energy storage voltage of the energy storage capacitor 532 to drop in the time period from time T3 to time T4. Therefore, at time T4, it can be considered that the outdoor power supply module 530 meets the first charging end condition (the indoor switching module 440 cuts off the connection between the first power line 100 and the signal line 300, causing the energy storage voltage of the energy storage capacitor 532 to drop). Therefore, at time T4, the outdoor control module 510 can control the outdoor switching module 540 to turn on the connection between the first power line 100 and the outdoor power supply module 530, and disconnect the connection between the signal line 300 and the outdoor power supply module 530 (the outdoor switching module 540 shown in Figure 9 changes from a high level state to a low level state at time T4).Furthermore, at time T4, it can also be considered that the outdoor power module 530 has reached a second predetermined duration, i.e., the duration between time T0 and time T4, and the outdoor power module 530 has satisfied the first charging termination condition and controls the outdoor switching module 540 to switch the connection. Therefore, after the indoor switching module 440 switches to the off state at time T3, the outdoor switching module 540 restores the connection between the first power line 100 and the outdoor power module 530, and the first power line 100 stops occupying the signal line 300. At time T4, after the outdoor switching module 540 connects the first power line 100 to the outdoor power module 530, the first power line 100 can directly supply power to the outdoor power module 530. At this point, the outdoor control module 510 can resume communication with the indoor control module 410 via the current loop communication circuit.

[0118] When the outdoor control module 510 receives the shutdown signal from the indoor control module 410 at time T5, the outdoor control module 510 can control the outdoor switching module 540 to cut off the connection between the first power line 100 and the outdoor power module 530, and turn on the connection between the signal line 300 and the outdoor power module 530 (as shown in Figure 9, the outdoor switching module 540 changes from a low level state to a high level state at time T5). At this time, since the first power line 100 cannot directly supply power to the outdoor power module 530, and the indoor switching module 440 is in the cut-off state, the first power line 100 cannot use the signal line 300 to supply power to the outdoor power module 530. Therefore, as shown in Figure 9, after time T5, the energy storage voltage of the energy storage capacitor 532 continues to decrease until it drops to zero.

[0119] In addition, referring to FIG10 , FIG10 is a timing diagram of the energy storage voltage of the energy storage capacitor provided in another embodiment of the present application. It is understood that the indoor switching module 440 may include a thyristor assembly 442. Therefore, at time T0 (when the indoor control module 410 receives the power-on signal), the outdoor switching module 440 may receive a PWM drive signal sent by the indoor switching module 410, causing the thyristor assembly 442 to turn on; and at time T3 (when the conduction duration of the indoor switching module 440 reaches the first preset duration), the indoor control module 410 stops sending the PWM drive signal to the indoor switching module 440, causing the thyristor assembly 442 to turn off.

[0120] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are used to enable a computer to execute the control method of the embodiment of the third aspect above, for example, executing method steps S710 to S730 in Figure 7 and method step S810 in Figure 8.

[0121] The computer-readable storage medium provided in accordance with an embodiment of the present application has at least the following effects: when the indoor control module receives a power-on signal, the indoor control module controls the indoor switching module to turn on, and the first power line can be connected to the signal line; because the outdoor switching module in standby mode maintains the signal line connected to the outdoor power module, and the second power line also remains connected to the outdoor power module, power can be delivered to the outdoor power module via the signal line and the second power line to wake up the outdoor circuit. When the outdoor circuit is powered, the indoor control module can control the indoor switching module to disconnect the first output terminal from the signal line, and the outdoor control module controls the outdoor switching module to connect the first power line to the outdoor power module, thereby restoring normal power supply using the first power line and the second power line. Therefore, under normal operating conditions, the indoor power module and the outdoor power module can directly obtain power supply through the first power line and the second power line, and the indoor circuit does not need to carry the load current of the outdoor circuit. At the same time, only by controlling a module with a controllable switch function set in the indoor circuit and the outdoor circuit, the indoor side can realize standby control, wake-up control and power supply control of the outdoor side, which optimizes the power supply circuit architecture between the indoor unit and the outdoor unit, has a simple structure, simplifies the power supply control, and improves the safety of the power supply control.

[0122] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on computer-readable media, which can include computer storage media or non-transitory media and communication media or transient media. As is well known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVDs) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0123] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A power supply circuit for an air conditioner indoor and outdoor unit, comprising: First power cord; Second power cord; signal line; The indoor circuit includes an indoor control module, an indoor communication module, an indoor power module, and an indoor switching module whose on / off is controlled by the indoor control module. The indoor control module is respectively connected to the output end of the indoor power module and the indoor communication module. The indoor switching module is used to control the connection between the first power line and the signal line. The first input end of the indoor power module is simultaneously connected to the indoor switching module and the first power line, and the second input end of the indoor power module is connected to the second power line. as well as An outdoor circuit includes an outdoor control module, an outdoor communication module, an outdoor power module for converting power and storing electrical energy, and an outdoor switching module whose on / off is controlled by the outdoor control module. The outdoor control module is respectively connected to the outdoor communication module and the outdoor power module. The outdoor communication module is connected to the indoor communication module via the signal line. The outdoor switching module is used to control the connection status between the outdoor power module, the first power line, and the signal line. Wherein, the second power line is connected to the outdoor power module and the outdoor communication module at the same time; or, The second power line is connected to the outdoor power module, and the outdoor communication module is connected to a connection point between the outdoor switching module and the outdoor power module.

2. The power supply circuit for the indoor and outdoor units of the air conditioner according to claim 1, wherein: The indoor switching module includes an indoor switching switch and a protective resistor, the first switch contact of the indoor switching switch is connected to the first input end, the second switch contact of the indoor switching switch is connected to the signal line through the protective resistor, and the control contact of the indoor switching switch is connected to the indoor control module.

3. The power supply circuit for the indoor and outdoor units of an air conditioner according to claim 1 or 2, wherein: The indoor switching module includes a thyristor assembly and a protective resistor. The control electrode of the thyristor assembly is connected to the indoor control module, the first electrode of the thyristor assembly is connected to the first input end, and the second electrode of the thyristor assembly is connected to the signal line through the protective resistor.

4. The power supply circuit for the indoor and outdoor units of an air conditioner according to any one of claims 1 to 3, wherein: The first power line is a live wire, the second power line is a neutral wire, the first input end is connected to the input contact of the indoor switching module and the first power line at the same time, the outdoor switching module includes a normally open switch contact, a normally closed switch contact and a common contact, the normally open switch contact is connected to the first power line, the normally closed switch contact is connected to the signal line, and the common contact is connected to the outdoor power module; the second power line is respectively connected to the second input end and the outdoor power module.

5. The power supply circuit for the indoor and outdoor units of an air conditioner according to any one of claims 1 to 4, wherein: The first power line is a neutral line, the second power line is a live line, the first input end is connected to the input contact of the indoor switching module and the first power line at the same time, the outdoor switching module includes a normally open switch contact, a normally closed switch contact and a common contact, the normally open switch contact is connected to the first power line, the normally closed switch contact is connected to the signal line, and the common contact is respectively connected to the outdoor communication module and the outdoor power module; The second power line is connected to the second input end and the outdoor power module respectively.

6. The power supply circuit for the indoor and outdoor units of an air conditioner according to any one of claims 1 to 5, wherein: The indoor circuit further includes a power input port for accessing an external AC power supply, and the power input port is connected to the first input end and the second input end respectively.

7. The power supply circuit for the indoor and outdoor units of an air conditioner according to any one of claims 1 to 6, wherein: The outdoor circuit includes a power adapter for accessing an external AC power supply. The power adapter is connected to the first input end through the first power line and is connected to the second input end through the second power line.

8. The power supply circuit for indoor and outdoor units of an air conditioner according to any one of claims 1 to 7, wherein: The outdoor power supply module includes a rectifier component and an energy storage capacitor connected in parallel, one input end of the rectifier component is connected to the outdoor switching module, and the other input end is connected to the second power line, and the output end of the rectifier component is connected to the outdoor control module through the energy storage capacitor.

9. The power supply circuit for the indoor and outdoor units of an air conditioner according to claim 8, wherein: A voltage division detection module for detecting the energy storage voltage of the energy storage capacitor is provided between the outdoor power supply module and the outdoor control module.

10. An air conditioner comprising the power supply circuit for indoor and outdoor units of the air conditioner according to any one of claims 1 to 9.

11. A method for controlling a power supply circuit for an indoor / outdoor unit of an air conditioner, the method being applied to the power supply circuit for an indoor / outdoor unit of an air conditioner according to any one of claims 1 to 9 or the air conditioner according to claim 10; The control method includes: In response to a power-on signal, the indoor control module controls the indoor switching module to connect the first power line to the signal line; In response to the on-time of the indoor switching module reaching a first preset time, the indoor control module controls the indoor switching module to cut off the connection between the first power line and the signal line, so that the first power line stops supplying power to the outdoor power module through the signal line; as well as In response to the outdoor power module meeting the first charging end condition, the outdoor control module controls the outdoor switching module to connect the first power line to the outdoor power module so that power is supplied to the outdoor power module through the first power line and the second power line.

12. The control method according to claim 11, further comprising: In response to the outdoor control module receiving the shutdown signal sent by the indoor control module, the outdoor control module controls the outdoor switching module to cut off the connection between the first power line and the outdoor power module, and to connect the connection between the signal line and the outdoor power module.

13. The control method according to claim 11 or 12, wherein: The first charging end condition is that the working time of the outdoor power supply module reaches a second preset time.

14. The control method according to claim 13, wherein: The first preset time length is shorter than the second preset time length.

15. The control method according to any one of claims 11 to 14, applied to the power supply circuit of the indoor and outdoor units of the air conditioner according to claim 8, wherein: The first charging end condition is that the indoor switching module cuts off the connection between the first power line and the signal line, causing the energy storage voltage of the energy storage capacitor to drop.

16. The control method according to any one of claims 11 to 15, applied to the power supply circuit of the indoor and outdoor units of the air conditioner according to claim 3, wherein: The indoor control module controls the indoor switching module to be turned on, including: The indoor control module sends a driving PWM signal to the control electrode of the thyristor assembly, wherein the duty cycle of the driving PWM signal is constant or the duty cycle increases gradually. 17 . A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to enable a computer to execute the air conditioner control method according to claim 11 .

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