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

Abstract

The invention discloses an air conditioner indoor and outdoor unit power supply circuit and device, an air conditioner, a control method and a medium, the air conditioner indoor and outdoor unit power supply circuit comprises an indoor unit circuit and an outdoor unit circuit, and the indoor unit circuit comprises an indoor and outdoor unit wire holder, a power supply adapter used for switching an external alternating current power supply and an indoor control module used for driving and controlling an indoor load. The indoor and outdoor unit wire holder comprises a power supply access port used for obtaining a direct-current power supply, and the power supply access port is connected with the indoor control module. The outdoor unit circuit comprises a power supply conversion module used for converting an external alternating current power supply and outputting two paths of voltage-reduced direct current power supplies and an outdoor control module used for driving and controlling an outdoor load, the input end of the power supply conversion module is connected with the power supply adapter, the output end of the power supply conversion module is connected with the power supply access port, and the other output end of the power supply conversion module is used for supplying power to the outdoor load. By optimizing the air conditioner indoor and outdoor unit power supply circuit architecture, the size of an indoor side power supply circuit is reduced while the cost is reduced, and the internal space of an indoor unit is released.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to a power supply circuit, a device, an air conditioner, a control method and a medium for an indoor and outdoor unit of an air conditioner. Background Art

[0002] At present, an air conditioning system includes an indoor unit and an outdoor unit. Usually, the indoor unit is connected to the AC mains, and then the power is supplied to the outdoor unit through a high-voltage connection line. Therefore, both the indoor unit and the outdoor unit need to be equipped with an AC / DC power conversion circuit to supply DC power to the indoor unit load and the outdoor unit load respectively. Since the voltage of the AC mains is relatively high, based on safety requirements, the spacing between adjacent circuits is designed to be relatively large, which requires the size of the main control circuit boards in the indoor unit and the outdoor unit to be enlarged accordingly, thus squeezing the internal space of the indoor unit. Summary of the Invention

[0003] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a power supply circuit, a device, an air conditioner, a control method and a medium for an indoor and outdoor unit of an air conditioner, which optimize the power supply circuit architecture of the indoor and outdoor units of the air conditioner, can reduce costs while reducing the size of the indoor-side power supply circuit, and release the internal space of the indoor unit.

[0004] In a first aspect, an embodiment of the present invention provides a power supply circuit for an indoor and outdoor unit of an air conditioner, including:

[0005] An indoor unit circuit, including an indoor and outdoor connection socket, a power supply transfer socket for transferring an external AC power supply, and an indoor control module for driving and controlling an indoor load. The indoor and outdoor connection socket includes a power supply access port for obtaining a DC power supply, and the power supply access port is connected to the indoor control module;

[0006] An outdoor unit circuit, including a power conversion module for converting and outputting two stepped-down DC power supplies from an external AC power supply and an outdoor control module for driving and controlling an outdoor load. Among them, the input end of the power conversion module is connected to the power supply transfer socket, one output end of the power conversion module is connected to the power supply access port, and the other output end is connected to the outdoor control module.

[0007] According to the indoor and outdoor unit power supply circuit provided by the embodiments of the present invention, it has at least the following beneficial effects: When taking power from the indoor side of the air-conditioning system, the indoor unit circuit transmits the external AC power to the power conversion module in the outdoor unit circuit through the power transfer socket for rectification and step-down. Then, for the two paths of stepped-down DC power output by the power conversion module, one path can supply power to the outdoor load, and the other path can supply power to the indoor load through the power access port of the indoor unit circuit. Therefore, by optimizing the power supply circuit architecture of the indoor and outdoor units of the air conditioner, the power supply circuit provided by the embodiments of the present invention multiplexes the power conversion module of the outdoor unit circuit to supply power to the indoor load. Thus, there is no need to separately configure power conversion modules for the indoor unit circuit and the outdoor unit circuit to independently supply power to the indoor / outdoor loads. The indoor unit circuit only undertakes the function of transferring the external AC power to the outdoor unit circuit, saving electronic devices in the circuit, reducing the circuit cost, and at the same time reducing the size of the indoor unit circuit. Furthermore, it can release the internal space of the indoor unit, which is helpful for the layout design of the internal space of the air-conditioning system.

[0008] In the indoor and outdoor unit power supply circuit provided by the embodiments of the present invention, the indoor unit circuit further includes a first step-down module for supplying power to the indoor primary load and a second step-down module for supplying power to the indoor secondary load. The first step-down module is connected to the power access port, the second step-down module is connected to the first step-down module, and the operating power of the indoor primary load is higher than that of the indoor secondary load.

[0009] In the indoor and outdoor unit power supply circuit provided by the embodiments of the present invention, the indoor unit circuit includes an indoor unit primary circuit and an indoor unit secondary circuit. The indoor-outdoor connection socket, the power transfer socket, and the first step-down module are located in the indoor unit primary circuit; the indoor control module and the second step-down module are located in the indoor unit secondary circuit.

[0010] In the indoor and outdoor unit power supply circuit provided by the embodiments of the present invention, the indoor unit primary circuit further includes a first switching device for controlling the connection or disconnection between the indoor primary load and the first step-down module, and the first switching device is connected to the indoor control module.

[0011] In the indoor and outdoor unit power supply circuit provided by the embodiments of the present invention, the power conversion module includes a rectification module connected to the power transfer socket, a primary winding connected to the output end of the rectification module, a first secondary winding connected to the power access port, and a second secondary winding for connecting to the outdoor load.

[0012] In the indoor and outdoor unit power supply circuit provided by the embodiment of the present invention, the indoor and outdoor unit wiring base further includes a standby control port connected to the indoor control module, the power conversion module includes a second switching device for controlling the on or off of the second secondary winding path, and the second switching device is connected to the standby control port.

[0013] In the indoor and outdoor unit power supply circuit provided by the embodiment of the present invention, the power conversion module further includes an anti-interference module, and the output end of the rectification module is connected to the primary winding through the anti-interference module.

[0014] In the indoor and outdoor unit power supply circuit provided by the embodiment of the present invention, the power conversion module further includes a power factor correction module, and the output end of the rectification module is connected to the primary winding through the power factor correction module.

[0015] In the indoor and outdoor unit power supply circuit provided by the embodiment of the present invention, the indoor unit circuit further includes an AC power supply interface for supplying power to the indoor AC load, and an AC switching device controlled by the indoor control module to be turned on and off. One switching contact of the AC switching device is connected to the AC power supply interface, and the other switching contact is connected to the power transfer base.

[0016] In a second aspect, the embodiment of the present invention provides an indoor and outdoor unit power supply device for an air conditioner. The indoor and outdoor unit power supply device for an air conditioner includes an indoor circuit board for installation in an indoor unit and an outdoor circuit board for installation in an outdoor unit. The indoor circuit board includes the indoor unit circuit in the indoor and outdoor unit power supply circuit as described in the first aspect embodiment above, and the outdoor circuit board includes the outdoor unit circuit in the indoor and outdoor unit power supply circuit as described in the first aspect embodiment above.

[0017] According to the indoor and outdoor unit power supply device for an air conditioner provided by the embodiment of the present invention, it has at least the following effects: when taking power on the indoor side of the air conditioner system, the indoor circuit board transmits the external AC power to the power conversion module in the outdoor circuit board through the power transfer base for rectification and step-down. Then, the two paths of stepped-down DC power output by the power conversion module, one path can supply power to the outdoor load, and the other path can supply power to the indoor load through the power access port of the indoor circuit board. Therefore, the indoor and outdoor unit power supply device for an air conditioner provided by the embodiment of the present invention optimizes the indoor and outdoor unit power supply circuit architecture, and reuses the power conversion module in the outdoor circuit board to supply power to the indoor load. Thus, the indoor circuit board and the outdoor circuit board do not need to be respectively configured with power conversion modules to independently supply power to the indoor / outdoor loads, that is, the indoor circuit board only undertakes the function of transferring the external AC power to the outdoor circuit board, saving the electronic components in the circuit board, reducing the circuit cost, and at the same time reducing the size of the indoor circuit board, thereby being able to release the internal space of the indoor unit and contributing to the layout design of the internal space of the air conditioner system.

[0018] In the air conditioner indoor and outdoor unit power supply device provided by the embodiment of the present invention, the indoor circuit board includes an indoor primary circuit board and an indoor secondary circuit board. The indoor primary circuit board includes the indoor primary circuit in the air conditioner indoor and outdoor unit power supply circuit as described in the embodiment of the first aspect above, and the indoor secondary circuit board includes the indoor secondary circuit in the air conditioner indoor and outdoor unit power supply circuit as described in the embodiment of the first aspect above.

[0019] In a third aspect, an embodiment of the present invention provides an air conditioner, including the air conditioner indoor and outdoor unit power supply circuit as described in the embodiment of the first aspect above or the air conditioner indoor and outdoor unit power supply device as described in the embodiment of the second aspect above.

[0020] According to the air conditioner provided by the embodiment of the present invention, it has at least the following effects: When taking power on the indoor side of the air conditioner system, the indoor unit circuit transmits the external AC power to the power conversion module in the outdoor unit circuit through the power transfer base for rectification and step-down. Then, for the two paths of stepped-down DC power output by the power conversion module, one path can supply power to the outdoor load, and the other path can supply power to the indoor load through the power access port of the indoor unit circuit. Therefore, by optimizing the architecture of the air conditioner indoor and outdoor unit power supply circuit, the air conditioner indoor and outdoor unit power supply circuit provided by the embodiment of the present invention multiplexes the power conversion module of the outdoor unit circuit to supply power to the indoor load. Thus, the indoor unit circuit and the outdoor unit circuit do not need to be respectively configured with power conversion modules to independently supply power to the indoor / outdoor loads. The indoor unit circuit only undertakes the function of transferring the external AC power to the outdoor unit circuit, saving the electronic devices in the circuit, reducing the circuit cost, and at the same time reducing the size of the indoor unit circuit. Furthermore, it can release the internal space of the indoor unit, which is helpful for the layout design of the internal space of the air conditioner system.

[0021] In a fourth aspect, an embodiment of the present invention provides a control method for an air conditioner, which is applied to the indoor control module of the air conditioner indoor and outdoor unit power supply circuit as described in the embodiment of the first aspect above. The indoor unit circuit further includes a primary step-down module for supplying power to the indoor primary load and a secondary step-down module for supplying power to the indoor secondary load. The primary step-down module is connected to the power access port, and the secondary step-down module is connected to the primary step-down module. The operating power of the indoor primary load is higher than that of the indoor secondary load; the indoor unit circuit includes an indoor unit primary circuit and an indoor unit secondary circuit. The indoor and outdoor connection base, the power transfer base, and the primary step-down module are located in the indoor unit primary circuit; the indoor control module and the secondary step-down module are located in the indoor unit secondary circuit; the indoor unit primary circuit further includes a first switching device for controlling the connection or disconnection between the indoor primary load and the primary step-down module, and the first switching device is connected to the indoor control module;

[0022] The control method includes:

[0023] Send a first standby signal to the first switching device to control the disconnection of the first-stage buck module from the indoor first-stage load;

[0024] Or,

[0025] Send a first wake-up signal to the first switching device to control the connection of the first-stage buck module to the indoor first-stage load.

[0026] According to the control method of the air conditioner provided by the embodiment of the present invention, at least the following effects are achieved: when the indoor side of the air-conditioning system takes power, the indoor unit circuit transmits the external AC power to the power conversion module in the outdoor unit circuit through the power transfer base for rectification and bucking. Then, the two bucked DC powers output by the power conversion module, one can supply power to the outdoor load, and the other can supply power to the indoor load through the power access port of the indoor unit circuit. Based on this, the indoor control module can control the first switching device to be turned on or off, so as to realize the control of whether the indoor first-stage load can obtain power through the first-stage buck module, and realize the on-off control and standby wake-up control of the indoor first-stage load. It can simplify the standby wake-up control and at the same time simplify the circuit part of the standby wake-up control in the power supply circuits of the indoor and outdoor units of the air conditioner, which is beneficial to reducing the size of the indoor unit circuit, and further can release the internal space of the indoor unit.

[0027] In a fifth aspect, an embodiment of the present invention provides a control method for an air conditioner, which is applied to the indoor control module of the indoor and outdoor unit power supply circuit as described in the first aspect embodiment above. The power conversion module includes a rectification module connected to the power transfer base, a primary winding connected to the output end of the rectification module, a first secondary winding connected to the power access port, and a second secondary winding for connecting to an outdoor load. The indoor and outdoor connection base further includes a standby control port connected to the indoor control module. The power conversion module includes a second switching device for controlling the conduction or disconnection of the second secondary winding, and the second switching device is connected to the standby control port;

[0028] The control method includes:

[0029] Send a second standby signal to the second switching device through the standby control port to cut off the second secondary winding and stop supplying power to the outdoor load;

[0030] Or,

[0031] Send a second wake-up signal to the second switching device through the standby control port to connect the second secondary winding and resume supplying power to the outdoor load.

[0032] The control method of the air conditioner provided by the embodiment of the present invention has at least the following effects: When the indoor side of the air conditioning system takes power, the indoor unit circuit transmits the external AC power to the power conversion module in the outdoor unit circuit through the power adapter for rectification and step-down. Then, the two paths of stepped-down DC power output by the power conversion module, one path can supply power to the outdoor load, and the other path can supply power to the indoor load through the power access port of the indoor unit circuit. Based on this, the indoor control module can control the second switching device to be turned on or off through the standby control port, so as to control whether the outdoor load can take power through the second secondary winding, and realize the on-off control of the outdoor load, that is, the standby wake-up control. It can simplify the standby wake-up control while simplifying the circuit part of the standby wake-up control in the power supply circuits of the indoor and outdoor units of the air conditioner, which is beneficial to reducing the size of the indoor unit circuit, and further can release the internal space of the indoor unit.

[0033] In a sixth aspect, the embodiment of the present invention provides a control method for an air conditioner, which is applied to the indoor control module of the indoor and outdoor unit power supply circuit of the air conditioner as described in the first aspect embodiment above. The indoor unit circuit further includes an AC power supply interface for supplying power to the indoor AC load, and an AC switching device controlled by the indoor control module to be turned on and off. One switching contact of the AC switching device is connected to the AC power supply interface, and the other switching contact is connected to the power adapter;

[0034] The control method includes:

[0035] Sending an AC standby signal to the AC switching device to control the disconnection of the power adapter from the AC power supply port;

[0036] Or,

[0037] Sending an AC wake-up signal to the AC switching device to control the connection of the power adapter to the AC power supply port.

[0038] The control method of the air conditioner provided by the embodiment of the present invention has at least the following effects: When the indoor side of the air conditioning system takes power, the indoor unit circuit transmits the external AC power to the power conversion module in the outdoor unit circuit through the power adapter for rectification and step-down. Then, the two paths of stepped-down DC power output by the power conversion module, one path can supply power to the outdoor load, and the other path can supply power to the indoor load through the power access port of the indoor unit circuit. Based on this, the indoor control module can control the AC switching device to be turned on or off, so as to control whether the indoor AC load can take power from the power adapter through the AC power supply port, and realize the on-off control of the indoor AC load, that is, the standby wake-up control. It can simplify the standby wake-up control while simplifying the circuit part of the standby wake-up control in the power supply circuits of the indoor and outdoor units of the air conditioner, which is beneficial to reducing the size of the indoor unit circuit, and further can release the internal space of the indoor unit.

[0039] In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the control method of the air conditioner as described in the embodiments of the fourth to sixth aspects above.

[0040] According to the computer-readable storage medium provided by the embodiment of the present invention, it has at least the following beneficial effects: When taking power from the indoor side of the air-conditioning system, the indoor unit circuit transmits the external AC power to the power conversion module in the outdoor unit circuit through the power adapter for rectification and step-down. Then, for the two paths of stepped-down DC power output by the power conversion module, one path can supply power to the outdoor load, and the other path can supply power to the indoor load through the power access port of the indoor unit circuit. Based on this, the switching device can be controlled to be turned on or off by the indoor control module, so as to control the on-off situation of the load, and further realize the standby wake-up control of the load. It can simplify the standby wake-up control and the circuit part of the standby wake-up control in the power supply circuits of the indoor and outdoor units of the air conditioner, which is beneficial to reducing the size of the indoor unit circuit and further releasing the internal space of the indoor unit.

[0041] Other features and advantages of the present invention will be described in the following description, and some of them will be obvious from the description, or understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the description. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation to the technical solutions of the present invention.

[0043] The present invention will be further described below in conjunction with the drawings and embodiments;

[0044] Figure 1 It is a schematic structural diagram of the power supply circuit for the indoor and outdoor units of the air conditioner provided by the embodiment of the present invention;

[0045] Figure 2 It is a schematic structural diagram of the indoor unit circuit provided by the embodiment of the present invention;

[0046] Figure 3 It is a schematic structural diagram of the indoor unit circuit provided by another embodiment of the present invention;

[0047] Figure 4 It is a schematic circuit connection diagram of the power supply circuit for the indoor and outdoor units of the air conditioner provided by the embodiment of the present invention;

[0048] Figure 5Structural schematic diagram of the power conversion module provided by the embodiment of the present invention;

[0049] Figure 6 Structural schematic diagram of the indoor and outdoor unit power supply device of the air conditioner provided by the embodiment of the present invention;

[0050] Figure 7 Structural schematic diagram of the indoor and outdoor unit power supply device of the air conditioner provided by another embodiment of the present invention. Detailed implementation manners

[0051] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0052] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the number itself, "above", "below", "within", etc. are understood as including the number itself, "at least one" means one or more, and "at least one of the following" and its similar expressions refer to any combination of these items, including any combination of single items or plural items. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0053] It should be noted that the terms such as "set", "installed", "connected", etc. in the embodiments of the present invention should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connected" can be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium.

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

[0055] In the description of the present invention, unless otherwise clearly defined, the terms such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0056] At present, the air-conditioning system includes an indoor unit and an outdoor unit. Usually, the indoor unit of the air-conditioning system is connected to the AC mains power supply, and then the power supply is provided to the outdoor unit through a high-voltage connection wire. Therefore, both the indoor unit and the outdoor unit need to be configured with an AC / DC power conversion circuit to rectify the AC mains power supply into a DC power supply, so as to be able to supply power to the loads of the indoor unit and the outdoor unit respectively. At the same time, since the voltage of the connected AC mains power supply is relatively high, in order to reduce the occurrence of high-voltage circuit short-circuit arcing, contacts and other situations, a safety distance interval needs to be set between adjacent electronic devices, so that the sizes of the main control circuit boards in the indoor unit and the outdoor unit are also correspondingly enlarged. In the case of limited volume of the indoor unit, the installation space of the internal components of the indoor unit is compressed.

[0057] Based on this, the present invention provides a power supply circuit, a device, an air conditioner, a control method and a medium for the indoor and outdoor units of an air conditioner. When the power is taken from the indoor side of the air-conditioning system, the indoor unit circuit transmits the external AC power supply to the power conversion module in the outdoor unit circuit through a power transfer base for rectification and voltage reduction. Then, the two paths of the stepped-down DC power supply output by the power conversion module, one path can supply power to the outdoor load, and the other path can supply power to the indoor load through the power access port of the indoor unit circuit. Therefore, the power supply circuit for the indoor and outdoor units of the air conditioner provided by the embodiments of the present invention optimizes the power supply circuit architecture of the indoor and outdoor units of the air conditioner, and reuses the power conversion module of the outdoor unit circuit to supply power to the indoor load. Thus, the indoor unit circuit and the outdoor unit circuit do not need to be respectively configured with a power conversion module to independently supply power to the indoor / outdoor load. The indoor unit circuit only undertakes the function of transferring the external AC power supply to the outdoor unit circuit, saving the electronic devices in the circuit, reducing the circuit cost, and at the same time reducing the size of the indoor unit circuit, and further being able to release the internal space of the indoor unit, which is helpful for the layout design of the internal space of the air-conditioning system.

[0058] The following further elaborates on the embodiments of the present invention with reference to the accompanying drawings.

[0059] In a first aspect, an embodiment of the present invention provides a power supply circuit for the indoor and outdoor units of an air conditioner. Refer to Figure 1 , Figure 1Schematic diagram of the power supply circuit for the indoor and outdoor units of the air conditioner provided by the embodiments of the present invention. It can be understood that the power supply circuit for the indoor and outdoor units of the air conditioner includes an indoor unit circuit 100 and an outdoor unit circuit 200. The power supply circuit for the indoor and outdoor units of the air conditioner is applied to the air conditioner system, while the indoor unit circuit 100 is applied to the indoor unit in the air conditioner system, and the outdoor unit circuit 200 is applied to the outdoor unit in the air conditioner system. For the case of taking power from the indoor side of the air conditioner system, the indoor unit circuit 100 includes an indoor and outdoor unit wiring seat 112, a power supply adapter seat 111, and an indoor control module 121, while the outdoor unit circuit 200 includes a power conversion module 220 and an outdoor control module 210. Among them, the power supply adapter seat 111 is used to transfer the external AC power on the indoor side to the power conversion module 220 of the outdoor unit circuit 200. Specifically, the power supply adapter seat 111 includes an AC live wire port, an AC neutral wire port, and an AC ground wire port. The external AC power is respectively connected to the AC live wire port, the AC neutral wire port, and the AC ground wire port of the power supply adapter seat 111 through the indoor unit AC live wire L1, the indoor unit AC neutral wire N1, and the indoor unit AC ground wire PE1. Thus, the power conversion module 220 in the outdoor unit circuit 200 is respectively connected to the AC live wire port, the AC neutral wire port, and the AC ground wire port of the power supply adapter seat 111 through the outdoor unit AC live wire L2, the outdoor unit AC neutral wire N2, and the outdoor unit AC ground wire PE2. Furthermore, the outdoor unit circuit 200 can obtain the external AC power through the power supply adapter seat 111 of the indoor unit circuit 100.

[0060] After the power conversion module 220 of the outdoor unit circuit 200 obtains an external AC power supply, it can rectify and step down the external AC power supply to obtain a stepped-down DC power supply. Moreover, the power conversion module 220 divides the stepped-down DC power supply into two outputs. One output powers the outdoor load 260 (including the outdoor control module 210) of the outdoor unit, and the other output is connected to the power access port of the indoor and outdoor unit wiring base 112 in the indoor unit circuit 100 through a DC live wire and a DC ground wire. Thus, there is no need to set a corresponding AC / DC conversion circuit in the indoor unit circuit 100 to provide DC power for the indoor unit. The indoor load of the indoor unit can obtain DC power through the power access port. Therefore, the indoor and outdoor unit power supply circuit provided by the embodiment of the present invention optimizes the power supply circuit architecture and reuses the power conversion module 220 of the outdoor unit circuit 200 to power the indoor load, enabling the indoor unit circuit 100 to only undertake the function of transferring the external AC power supply to the outdoor unit circuit 200, saving the electronic devices in the indoor unit circuit 100 and simplifying the complexity of the indoor unit circuit 100. At this time, the indoor unit circuit 100 and the outdoor unit circuit 200 only need to be connected by a group of strong power connection wire sets (including the outdoor unit AC live wire L2, the outdoor unit AC neutral wire N2, and the outdoor unit AC ground wire PE2) and a group of isolated weak power connection wire sets (including the outdoor unit DC live wire L3, the outdoor unit DC ground wire, and the indoor and outdoor unit signal wire S). Compared with the power supply circuit architecture in the related art, only the outdoor unit DC live wire L3 and the outdoor unit DC ground wire in the weak power connection wire set are added, which can reduce the circuit cost while reducing the size of the indoor unit circuit 100 and releasing the internal space of the indoor unit, contributing to the layout design of the internal space of the indoor unit in the air conditioning system.

[0061] In addition, since the indoor unit circuit 100 can directly obtain DC power from the outdoor unit circuit 200 without performing power conversion on the external AC power supply, it only needs to transfer the external AC power supply to the outdoor unit circuit 200. Moreover, the DC power supply (such as a DC power supply of 5 volts to 30 volts) obtained from the outdoor unit circuit 200 has a much lower voltage than the external AC power supply (such as an AC power supply of 220 volts or 380 volts), which can reduce dangerous situations such as circuit short circuits and arcing caused by high voltage in the indoor unit circuit 100.

[0062] It should be noted that the indoor and outdoor unit signal wire S connected between the indoor unit circuit 100 and the outdoor unit circuit 200 is used for communication between the indoor control module 121 and the outdoor control module 210. Specifically, the indoor and outdoor unit wiring base 112 in the indoor unit circuit 100 further includes a communication port, and the indoor and outdoor unit signal wire S is respectively connected to the outdoor control module 210 and the indoor control module 121 through the communication port.

[0063] It should be noted that one output terminal of the power conversion module 220 can be connected to the outdoor control module 210. Thus, in addition to powering the outdoor control module 210, it can also control whether to supply power to the outdoor load 260 other than the outdoor control module 210 through the outdoor control module 210. That is, the power conversion module 220 supplies power to the outdoor load 260 other than the outdoor control module 210 through the outdoor control module 210. Correspondingly, the other output terminal of the power conversion module 220 can be respectively connected to the indoor control module 121 and the indoor load other than the indoor control module 121, and can also be connected to the indoor control module 121 through the power access port in the indoor unit circuit 100. Thus, while powering the indoor control module 121, it can realize the on-off control of the indoor load other than the indoor control module 121 through the indoor control module 121.

[0064] It should be noted that in the related art, in addition to the indoor unit control board, the indoor unit also includes a display board. The display board is a circuit board for carrying a temperature and humidity sensor, a digital display, and a display controller. The display controller can obtain the temperature and humidity data detected by the temperature and humidity sensor and then send it to the digital display for external display, facilitating the user to understand the environmental parameters of the indoor unit. At the same time, the display controller is also connected to the indoor unit main controller in the indoor unit control board for data interaction. In addition, a display step-down module for powering each electronic device in the display board is independently provided in the display board, and the display step-down module is connected to the power conversion circuit of the indoor unit board in the related art. The power supply circuit for the indoor and outdoor units of the air conditioner provided by the embodiment of the present invention not only optimizes the power supply architecture between the indoor and outdoor units, but also integrates and optimizes the architecture of the indoor unit board and the display board in the indoor unit. It combines the functions of the display controller of the display board and the indoor unit main controller of the indoor unit board in the related art, and only uses one controller (i.e., the indoor control module 121) to realize the functions of the display controller and the indoor unit main controller, further compressing the circuit size in the indoor unit and releasing the internal space of the indoor unit.

[0065] Refer to Figure 2 , Figure 2Schematic diagram of the indoor unit circuit 100 provided by another embodiment of the present invention. It can be understood that the indoor unit circuit 100 may include buck modules with multiple different buck levels. These buck modules can be connected to the power access port simultaneously, so that the DC power supplied by the outdoor unit circuit 200 can be stepped down by the buck modules with different buck levels to obtain power supplies with different voltages, meeting the power consumption requirements of indoor loads with different operating powers and effectively managing energy. These buck modules can also be connected in sequence according to the buck levels to step down the DC power supplied by the outdoor unit circuit 200 step by step to supply power to indoor loads with different working voltages, reducing energy waste. In addition, by setting buck modules with multiple different buck levels to achieve hierarchical power supply, the flexibility and scalability of the indoor unit circuit 100 can be improved. At the same time, the power supply areas of indoor loads with different operating powers can be divided. This can not only reduce the mutual interference when indoor loads with different operating powers are running, but also reduce the load intensity of the indoor unit circuit 100, extend the service life of the indoor unit circuit 100, effectively improve the operating efficiency of the air conditioning system, and ensure the stable operation of the equipment.

[0066] Specifically, the indoor unit circuit 100 may include a cascaded primary buck module 113 and a secondary buck module 122. The indoor unit includes an indoor primary load 114 and an indoor secondary load 123. Among them, the operating power of the indoor primary load 114 is higher than that of the indoor secondary load 123. At the same time, the working voltage of the indoor primary load 114 is also higher than that of the indoor secondary load 123. Therefore, the input end of the primary buck module 113 can obtain the DC power provided by the outdoor unit circuit 200 by connecting to the power access port. After performing primary buck on the DC power, a primary buck power supply is obtained. The primary buck module 113 is connected to both the indoor primary load 114 and the secondary buck module 122 at the same time, so that the indoor primary load 114 can obtain the primary buck power supply to work, and the secondary buck module 122 can perform secondary buck on the primary buck power supply to obtain a secondary buck power supply. Furthermore, the output end of the secondary buck module 122 can be connected to the indoor secondary load 123 to provide the secondary buck power supply for the indoor secondary load 123. In addition, the indoor control module 121 can be connected to the output end of the corresponding buck module according to the working voltage of the indoor control module 121.

[0067] Refer to Figure 3 , Figure 3Schematic diagram of the indoor unit circuit 100 provided by another embodiment of the present invention. It can be understood that according to the functions of the indoor unit circuit 100, the indoor unit circuit 100 is divided into an indoor unit primary circuit 110 and an indoor unit secondary circuit 120. Among them, the indoor unit primary circuit 110 includes an indoor and outdoor connection socket 112, a power transfer socket 111, and a primary step-down module 113, while the indoor unit secondary circuit 120 includes a secondary step-down module 122 and an indoor control module 121. It can be seen that the indoor unit primary circuit 110 is a circuit for carrying high-voltage power supply and power supply functions for high-power low-voltage loads, and the indoor unit secondary circuit 120 is a circuit for power supply of low-power low-voltage loads. Among them, the high-voltage power supply refers to a power supply whose DC power supply voltage is higher than the power supply access port of the indoor and outdoor connection socket 112, such as an external AC power supply with a voltage of 220V or 380V; the low-voltage load refers to a load powered by the DC power supply provided by the power supply access port of the indoor and outdoor connection socket 112 (that is, a power supply lower than the external AC power supply voltage, such as a power supply with a voltage of 12V to 36V); the high-power load refers to a load powered by the DC power supply provided by the primary step-down module 113 (such as a load with an operating power not less than 15W); the low-power load refers to a load whose operating power is lower than the operating power of the load powered by the DC power supply provided by the primary step-down module 113 (such as a load with an operating power lower than 15W), that is, a load with an operating power powered by the DC power supply provided by the secondary step-down module 122.

[0068] Therefore, by partitioning the indoor unit circuit 100, the electromagnetic interference between electrical components can be effectively reduced, the stability and electromagnetic compatibility of the indoor unit circuit 100 can be improved. At the same time, the electrical design can be made clearer, which is beneficial to improving the maintainability of the indoor unit circuit 100, facilitating layout adjustment of the indoor unit circuit 100, and quickly locating and repairing.

[0069] Refer to Figure 4 , Figure 4It is a schematic diagram of the circuit connection of the power supply circuit for the indoor and outdoor units of the air conditioner provided by the embodiment of the present invention. It can be understood that the power supply circuit for the indoor and outdoor units of the air conditioner may include an indoor unit primary circuit 110, an indoor unit secondary circuit 120, and an outdoor unit circuit 200. The external AC power supply is correspondingly connected to the power transfer base 111 in the indoor unit primary circuit 110 through the indoor machine AC live wire L1, the indoor machine AC neutral wire N1, and the indoor machine AC ground wire PE1. The outdoor unit circuit 200 obtains the external AC power supply from the power transfer base 111 through the outdoor machine AC live wire L2, the outdoor machine AC neutral wire N2, and the outdoor machine AC ground wire PE2 and delivers it to the rectification module in the power conversion module 220, converts it into a DC power supply, and then inputs it to the anti-interference module 230 for anti-interference processing (such as filtering), and then inputs the DC power supply after anti-interference processing to the primary winding 221. Through the first secondary winding 222 and the second secondary winding 223 that are coupled with the primary winding 221 to form an isolation transformer, the stepped-down DC power supply is respectively delivered to the power access port of the indoor and outdoor unit wiring base 112 in the indoor unit circuit 100, and the outdoor load 260 (such as an outdoor fan, an outdoor compressor, a four-way valve, an electronic expansion valve, etc.) in the outdoor unit circuit 200.

[0070] Among them, the outdoor unit circuit 200 may further include an outdoor step-down module 240. When the second secondary winding 223 delivers the stepped-down DC power supply to the outdoor load 260, the output end of the second secondary winding 223 may be connected to the outdoor step-down module 240, deliver a part of the DC power supply output by the second secondary winding 223 to some high-power outdoor loads 260, input another part of the DC power supply to the outdoor step-down module 240 for further stepping down, and then deliver the DC power supply after secondary stepping down to some low-power outdoor loads 260.

[0071] After the first secondary winding 222 delivers the stepped-down DC power supply to the power access port through the outdoor machine DC live wire L3 and the outdoor machine DC ground wire, some indoor loads that require a working voltage (such as an indoor fan) can directly obtain the DC power supply through the power access port. The indoor primary load 114 (such as a motor and a relay in the indoor unit) can obtain power and operate through the primary step-down module 113 connected to the power access port, while the indoor secondary load 123 (such as a temperature and humidity sensor, a voice module, a buzzer, etc.) in the indoor unit secondary circuit 120 obtains power through the secondary step-down module 122 cascaded with the primary step-down module 113. At the same time, the indoor loads (including the indoor primary load 114 and the indoor load) are all controlled by the indoor control module 121 to turn on or off.

[0072] Among them, the outdoor control module 210 is connected to the indoor control module 121 through a current loop communication circuit. Specifically, the current loop communication circuit is composed of the DC zero line PGND of the outdoor unit and the signal line S between the indoor and outdoor units. Among them, the connection base for the indoor and outdoor units can also be provided with a communication port connected to the indoor control module 121. The outdoor control module 210 is connected to the signal line S between the indoor and outdoor units, and then is connected to the communication port through the signal line S between the indoor and outdoor units. At the same time, the indoor control module 121 is also connected to the DC zero line PGND of the outdoor unit in the power access port, so that the outdoor control module 210 and the outdoor control module 210 can achieve communication.

[0073] Referring to Figure 4 , it can be understood that the first-level circuit 110 of the indoor unit further includes a first switching device 116. The first switching device 116 can be a first relay. The control end of the first switching device 116 is connected to the indoor control module 121. One switching contact of the first switching device 116 is connected to the indoor first-level load 114, and the other switching contact is connected to the output end of the first-level buck module 113. Therefore, the indoor control module 121 can send different control signals to the control end of the first switching device 116 to make the two switching contacts of the first switching device 116 close or open, so as to control the on-off of the indoor first-level load 114, and further realize the standby control of the indoor first-level load 114.

[0074] It can be understood that the indoor unit further includes an indoor AC load 115 powered by an external AC power supply. Therefore, an AC power supply interface can be reserved in the indoor unit circuit 100. The AC power supply interface is connected to the power transfer base 111, so that the indoor AC load 115 can obtain the external AC power through the AC power supply interface. In order to facilitate the indoor control module 121 to control the indoor AC load 115, an AC switching device 117 can also be provided in the indoor unit circuit 100. The control end of the AC switching device 117 is connected to the indoor control module 121. One switching contact of the AC switching device 117 is connected to the AC power supply interface, and the other switching contact is connected to the power transfer base 111. Therefore, the indoor control module 121 can control the on-off of the AC switching device 117, and further control the power supply situation of the indoor AC load 115, which is beneficial to improving the safety of the indoor unit circuit 100.

[0075] Referring to Figure 4, it can be understood that, in order to reduce the power consumption of the air conditioner in standby mode, the indoor and outdoor connection terminals 112 can also be provided with a standby control port, and the power conversion module 220 is also provided with a second switching device 250. The control end of the second switching device 250 is connected to the indoor control module 121 through the standby control port. One switching contact of the second switching device 250 is connected to the output end of the second secondary winding 223, and the other switching contact is connected to the outdoor step-down module 240. Thus, the indoor control module 121 can control the on / off of the second switching device 250, and then cut off or close the second secondary winding 223 to control the power supply situation of the outdoor load 260. Furthermore, when the air conditioner is in standby mode, the indoor control module 121 can send a cut-off signal to the control end of the second secondary winding 223 through the standby control port, so that the second secondary winding 223 is open-circuited, and the outdoor load 260 cannot obtain power and stops operating, realizing standby control.

[0076] It can be understood that the power conversion module 220 further includes an anti-interference module 230. One end of the anti-interference module 230 is connected to the output end of the rectification module, and the other end is connected to the input end of the primary winding 221. Among them, the anti-interference module 230 can include a filter circuit, an electromagnetic compatibility circuit, etc. The anti-interference module 230 can be used to suppress the electromagnetic interference of the power supply and stabilize the output power of the rectification module. Refer to Figure 4 , the anti-interference module 230 can be a filter circuit including a filter capacitor C1 connected between the outdoor unit AC live wire L2 and the outdoor unit AC ground wire PE2, and a filter capacitor C2 connected between the outdoor unit AC neutral wire N2 and the outdoor unit AC ground wire PE2.

[0077] Refer to Figure 5 , Figure 5 is a schematic structural diagram of the power conversion module provided by the embodiment of the present invention. It can be understood that a power factor correction (PFC) module can also be provided in the outdoor unit circuit 200. One end of the power factor correction module is connected to the output end of the rectification module, and the other end is connected to the input end of the primary winding 221. If the power conversion module 220 further includes an anti-interference module 230, the other end of the power factor correction module can be connected to the input end of the anti-interference module 230. The power factor correction module can be used to improve the power factor and electromagnetic interference (EMI) index of the circuit. By automatically controlling the external input current, while keeping the output voltage constant, it can improve the power factor of the system, thereby reducing the load on the power grid and power supply of the power system, reducing energy consumption and electricity bills, and at the same time reducing pollution and environmental impact.

[0078] It should be noted that, due to the limited internal space of the indoor unit in the related art, the circuit size in the indoor unit is also restricted, making it difficult to set up a power factor correction module in the power supply circuit of the indoor unit to improve the power utilization efficiency. However, in the power supply circuit of the indoor and outdoor units of the air conditioner provided in the embodiments of the present invention, the DC power supply obtained by the indoor unit circuit 100 is obtained from the power conversion module 220 of the outdoor unit. Therefore, the indoor unit circuit 100 can also reuse the power factor correction module in the outdoor unit power conversion module 220 to improve the power factor of the indoor unit circuit 100, effectively improving the power utilization rate of the split air conditioner.

[0079] In a second aspect, the embodiments of the present invention further provide a power supply device for the indoor and outdoor units of an air conditioner. Referring to Figure 6 , Figure 6 which is a schematic structural diagram of the power supply device for the indoor and outdoor units of the air conditioner provided in the embodiments of the present invention. It can be understood that the power supply device for the indoor and outdoor units of the air conditioner may include an indoor circuit board 300 and an outdoor circuit board 400. The indoor circuit board 300 may carry the indoor unit circuit 100 in the power supply circuit of the indoor and outdoor units of the air conditioner in the above embodiments, and the outdoor circuit board 400 may carry the outdoor unit circuit 200 in the power supply circuit of the indoor and outdoor units of the air conditioner in the above embodiments. Among them, the indoor circuit board 300 is installed in the indoor unit of the air conditioning system, and the outdoor circuit board 400 is installed in the outdoor unit of the air conditioning system. When taking power on the indoor side of the air conditioning system, since the indoor unit circuit 100 transmits the external AC power supply to the power conversion module 220 in the outdoor unit circuit 200 through the power transfer socket 111 for rectification and voltage reduction, then the two paths of stepped-down DC power supplies output by the power conversion module 220, one path can supply power to the outdoor load 260, and the other path can supply power to the indoor load through the power access port of the indoor unit circuit 100.

[0080] Therefore, by optimizing the power supply circuit architecture of the indoor and outdoor units of the air conditioner, it is equivalent to reusing the power conversion module 220 of the outdoor circuit board 400 to supply power to the indoor load. Thus, the indoor circuit board 300 and the outdoor circuit board 400 do not need to be respectively configured with power conversion circuits to independently supply power to the indoor / outdoor loads. The indoor circuit board 300 only undertakes the function of transferring the external AC power to the outdoor circuit board 400. At this time, the indoor circuit board 300 and the outdoor circuit board 400 only need to be connected through a set of strong power connection wire groups (including the outdoor unit AC live wire L2, the outdoor unit AC neutral wire N2, and the outdoor unit AC ground wire PE2) and a set of isolated weak power connection wire groups (including the outdoor unit DC live wire L3, the outdoor unit DC ground wire, and the indoor / outdoor unit signal wire S). Compared with the power supply circuit architecture in the related art, the power supply device for the indoor and outdoor units of the air conditioner only adds the outdoor unit DC live wire L3 and the outdoor unit DC ground wire in the weak power connection wire group, saves the electronic devices in the power conversion circuit, can reduce the circuit cost while reducing the size of the indoor unit circuit 100, release the internal space of the indoor unit, and is helpful for the layout design of the internal space of the indoor unit in the air conditioning system.

[0081] It should be noted that in the related art, in addition to the indoor unit control board, the indoor unit also includes a display board. The display board is a circuit board for carrying a temperature and humidity sensor, a digital display, and a display controller. The display controller can obtain the temperature and humidity data detected by the temperature and humidity sensor and then send it to the digital display for external display, so as to facilitate the user to understand the environmental parameters of the indoor unit. In addition, a display step-down module for supplying power to each electronic device in the display board is independently provided in the display board, and the display step-down module is connected to the power conversion circuit of the indoor unit board in the related art. In addition to optimizing the power supply architecture between the indoor and outdoor units, the power supply device for the indoor and outdoor units of the air conditioner provided by the embodiment of the present invention also integrates and optimizes the architecture of the indoor unit board and the display board in the indoor unit, combines the functions of the display controller of the display board and the indoor unit main controller of the indoor unit board in the related art, and only uses one controller (i.e., the indoor control module 121) to realize the functions of the display controller and the indoor unit main controller, further compressing the size of the circuit in the indoor unit and releasing the internal space of the indoor unit.

[0082] Refer to Figure 7 , Figure 7Schematic diagram of the power supply device for the indoor and outdoor units of the air conditioner provided by another embodiment of the present invention. It can be understood that the indoor unit circuit 100 can also be divided into the indoor unit primary circuit 110 for carrying the high-voltage power supply and the power supply function for high-power low-voltage loads and the indoor unit secondary circuit 120 for the power supply of low-power low-voltage loads according to the functions of the indoor unit circuit 100. Therefore, correspondingly, the indoor circuit board 300 can also be provided with an indoor primary circuit board 310 and an indoor secondary circuit board 320. Among them, the indoor primary circuit board 310 specifically carries the indoor unit primary circuit 110, and the indoor secondary circuit board 320 specifically carries the indoor unit secondary circuit 120, so as to realize circuit grading by separating the indoor unit circuit 100 on different circuit boards, more effectively reduce the electromagnetic interference between electrical components, improve the stability and electromagnetic compatibility of the indoor unit circuit 100. At the same time, by separating the two circuit boards, the size of the indoor unit primary circuit 110 and the indoor primary circuit board 310 can be further compressed, which is convenient for the design of the internal space of the indoor unit.

[0083] It should be noted that the indoor secondary circuit board 320 can be the display board in the indoor unit in the related art. By migrating the indoor control module 121 to the indoor secondary circuit board 320, integrating functions into the indoor control module 121 can effectively improve the data processing and communication speed, reduce the system delay, improve the performance of the air conditioner system, and at the same time help save energy consumption and reduce costs.

[0084] In the third aspect, the embodiment of the present invention also provides an air conditioner, which can include the power supply circuit for the indoor and outdoor units of the air conditioner in the above embodiment, or include the power supply device for the indoor and outdoor units of the air conditioner in the above embodiment. When taking power on the indoor side of the air conditioner system, the indoor unit circuit 100 transmits the external AC power to the power conversion module 220 in the outdoor unit circuit 200 through the power transfer base 111 for rectification and voltage reduction. Then, the two paths of rectified and reduced DC power output by the power conversion module 220, one path can supply power to the outdoor load 260, and the other path can supply power to the indoor load through the power access port of the indoor unit circuit 100. Therefore, the power supply circuit for the indoor and outdoor units of the air conditioner provided by the embodiment of the present invention optimizes the power supply circuit architecture of the indoor and outdoor units of the air conditioner, and reuses the power conversion module 220 of the outdoor unit circuit 200 to supply power to the indoor load. Thus, the indoor unit circuit 100 and the outdoor unit circuit 200 do not need to be separately configured with a power conversion module 220 to independently supply power to the indoor / outdoor load. The indoor unit circuit 100 only undertakes the function of transferring the external AC power to the outdoor unit circuit 200, saving the electronic components in the circuit, reducing the circuit cost, and at the same time reducing the size of the indoor unit circuit 100, and then being able to release the internal space of the indoor unit, which helps the layout design of the internal space of the air conditioner.

[0085] Based on the above power supply circuits for the indoor and outdoor units of the air conditioner, various embodiments of the control methods according to the fourth, fifth, and sixth aspects of the present invention are respectively proposed.

[0086] An embodiment of the fourth aspect of the present invention provides a control method for an air conditioner. This control method for the air conditioner can be applied to the indoor control module of the power supply circuit for the indoor and outdoor units of the air conditioner as shown in Figure 4 The control method includes, but is not limited to, step S110 and step S120:

[0087] Step S110: Send a first standby signal to the first switching device to disconnect the control of the first-level buck module from the indoor first-level load;

[0088] Or,

[0089] Step S120: Send a first wake-up signal to the first switching device to connect the control of the first-level buck module to the indoor first-level load.

[0090] It can be understood that the first switching device 116 can be a first relay. The control end of the first switching device 116 is connected to the indoor control module 121. One switching contact of the first switching device 116 is connected to the indoor first-level load 114, and the other switching contact is connected to the output end of the first-level buck module 113. Thus, the indoor control module 121 can send different control signals to the control end of the first switching device 116 to make the two switching contacts of the first switching device 116 close or open, thereby realizing the on-off control of the indoor first-level load 114, and further realizing the standby wake-up control of the indoor first-level load 114. Specifically, the indoor control module 121 can send a first standby signal to the control end of the first switching device 116, causing the two switching contacts of the first switching device 116 to open, so that the indoor first-level load 114 is disconnected from the output end of the first-level buck module 113. Further, the indoor first-level load 114 cannot draw power from the output end of the first-level buck module 113 and stops operating, realizing the standby control of the indoor first-level load 114. In addition, the indoor control module 121 can send a first wake-up signal to the control end of the first switching device 116, causing the two switching contacts of the first switching device 116 to close, so that the indoor first-level load 114 is reconnected to the output end of the first-level buck module 113. Further, the indoor first-level load 114 can draw power from the output end of the first-level buck module 113 and resume operation, realizing the wake-up control of the indoor first-level load 114. Therefore, the on-off situation of the indoor first-level load 114 can be controlled by the indoor control module 121 to control the first switching device 116 to turn on or off, and further realize the standby wake-up control of the indoor first-level load 114, which can simplify the standby wake-up control and simplify the circuit part of the standby wake-up control in the power supply circuit for the indoor and outdoor units of the air conditioner, is beneficial to reducing the size of the indoor unit circuit 100, and further can release the internal space of the indoor unit.

[0091] An embodiment of the fifth aspect of the present invention provides a control method for an air conditioner. This control method for the air conditioner can be applied to an indoor control module of the indoor and outdoor unit power supply circuit of the air conditioner as shown in Figure 4 The control method includes, but is not limited to, step S210 and step S220:

[0092] Step S210: Send a second standby signal to the second switching device through the standby control port to cut off the second secondary winding and stop supplying power to the outdoor load;

[0093] Or,

[0094] Step S220: Send a second wake-up signal to the second switching device through the standby control port to turn on the second secondary winding and resume supplying power to the outdoor load.

[0095] It can be understood that since the control terminal of the second switching device 250 is connected to the indoor control module 121 through the standby control port, one switching contact of the second switching device 250 is connected to the output terminal of the second secondary winding 223, and the other switching contact is connected to the outdoor buck module 240. The second switching device 250 can control whether the two switching contacts are connected according to its own control terminal. Therefore, the control terminal of the second switching device 250 can control the connection status of the two switching contacts based on the control signal sent by the indoor control module 121. Specifically, when the indoor control module 121 sends a second standby signal to the second switching device 250 through the standby control port, the two switching contacts of the second switching device 250 are disconnected, so that the second secondary winding 223 is disconnected from the outdoor load 260, and the outdoor load 260 cannot obtain power and stops operating, realizing low-power standby control; when the indoor control module 121 sends a second wake-up signal to the second switching device 250 through the standby control port, the two switching contacts of the second switching device 250 are reconnected, so that the second secondary winding 223 is connected to the outdoor load 260, and then the outdoor load 260 can obtain power through the second secondary winding 223 and operate, realizing the wake-up control of the outdoor load 260. Therefore, the second switching device 250 can be controlled to be turned on or off by the indoor control module 121, so as to control the on-off situation of the outdoor load 260, and further realize the standby wake-up control of the outdoor load 260. It can simplify the standby wake-up control and simplify the circuit part of the standby wake-up control in the indoor and outdoor unit power supply circuit of the air conditioner, which is beneficial to reducing the size of the indoor unit circuit 100, and further can release the internal space of the indoor unit.

[0096] An embodiment of the sixth aspect of the present invention provides a control method for an air conditioner. This control method for the air conditioner can be applied to an indoor control module of the indoor and outdoor unit power supply circuit of the air conditioner as shown in Figure 4The indoor control module of the power supply circuit for the indoor and outdoor units of the air conditioner shown. The control method includes, but is not limited to, steps S310 and S320:

[0097] Step S310: Send an AC standby signal to the AC switch device to disconnect the control power transfer socket from the AC power supply port;

[0098] Or,

[0099] Step S320: Send an AC wake-up signal to the AC switch device to connect the control power transfer socket to the AC power supply port.

[0100] It can be understood that the indoor unit also includes an indoor AC load 115 powered by an external AC power supply. The AC power supply interface in the indoor unit circuit 100 is connected to the power transfer socket 111, so that the indoor AC load 115 can obtain the external AC power through the AC power supply interface. Among them, the control end of the AC switch device 117 is connected to the indoor control module 121, and one switch contact of the AC switch device 117 is connected to the AC power supply interface, and the other switch contact is connected to the power transfer socket 111. Therefore, the indoor control module 121 can control the on / off of the AC switch device 117, and further control the power supply situation of the indoor AC load 115. Specifically, the indoor control module 121 can send an AC standby signal to the control end of the AC switch device 117, so that the two contacts of the AC switch device 117 are disconnected, the AC power supply interface is disconnected from the power transfer socket 111, and the AC power supply interface is in a power-off state at this time, that is, the indoor AC load 115 cannot obtain power from the AC power supply interface, realizing the standby control of the indoor AC load 115; in addition, the indoor control module 121 can also send an AC wake-up signal to the control end of the AC switch device 117, so that the two contacts of the AC switch device 117 are reconnected, and the AC power supply interface can be connected to the power transfer socket 111 to obtain power. The AC power supply interface is in a powered-on state at this time, that is, the indoor AC load 115 can obtain power from the AC power supply interface, realizing the wake-up control of the indoor AC load 115. Therefore, the on / off of the AC switch device 117 can be controlled by the indoor control module 121, so as to realize the on / off control of the indoor AC load 115, and further realize the standby wake-up control of the indoor AC load 115. It can simplify the standby wake-up control and simplify the circuit part of the standby wake-up control in the power supply circuit of the indoor and outdoor units of the air conditioner, which is beneficial to reducing the size of the indoor unit circuit 100, and further can release the internal space of the indoor unit.

[0101] In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the control method of the air conditioner according to the embodiments of the fourth to seventh aspects above. For example, execute method step S110 or step S120 in the embodiment of the fourth aspect, or execute method step S210 or step S220 in the embodiment of the fifth aspect, or execute method step S310 or step S320 in the embodiment of the sixth aspect.

[0102] According to the computer-readable storage medium provided by the embodiment of the present invention, when power is taken from the indoor side of the air-conditioning system, the indoor unit circuit transmits the external AC power to the power conversion module in the outdoor unit circuit through a power transfer base for rectification and voltage reduction. Then, the two rectified and voltage-reduced DC power supplies output by the power conversion module, one can supply power to the outdoor load, and the other can supply power to the indoor load through the power access port of the indoor unit circuit. Based on this, the switching device can be controlled to be turned on or off by the indoor control module, so as to realize the on-off control of the load, and further realize the standby wake-up control of the load. It can simplify the standby wake-up control and simplify the circuit part of the standby wake-up control in the power supply circuits of the indoor and outdoor units of the air conditioner, which is beneficial to reducing the size of the indoor unit circuit and further releasing the internal space of the indoor unit.

[0103] Those of ordinary skill in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware and their appropriate combinations. Some physical components or all 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 implemented as hardware, or implemented as an integrated circuit, such as an application specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium or a non-transitory medium and a communication medium or a transitory medium. As is well known to those of ordinary skill in the art, the term computer storage medium 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 technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically includes computer-readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0104] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. An indoor and outdoor unit power supply circuit for an air conditioner, characterized in that, Comprising: An indoor unit circuit, including an indoor and outdoor unit wiring base, a power supply adapter for transferring an external AC power supply, and an indoor control module for driving and controlling indoor loads. The indoor and outdoor unit wiring base includes a power supply access port for obtaining a DC power supply, and the power supply access port is connected to the indoor control module; An outdoor unit circuit, including a power conversion module for converting an external AC power supply into two stepped-down DC power supplies and an outdoor control module for driving and controlling outdoor loads. Among them, the input end of the power conversion module is connected to the power supply adapter, one output end of the power conversion module is connected to the power supply access port, and the other output end is used to supply power to the outdoor load.

2. The power supply circuit for the indoor and outdoor units of the air conditioner according to claim 1, wherein The indoor unit circuit further includes a first step-down module for supplying power to indoor primary loads and a second step-down module for supplying power to indoor secondary loads. The first step-down module is connected to the power supply access port, the second step-down module is connected to the first step-down module, and the operating power of the indoor primary loads is higher than that of the indoor secondary loads.

3. The air conditioner indoor and outdoor unit power supply circuit according to claim 2, characterized in that, The indoor unit circuit includes an indoor unit primary circuit and an indoor unit secondary circuit. The indoor and outdoor unit wiring base, the power supply adapter, and the first step-down module are located in the indoor unit primary circuit; the indoor control module and the second step-down module are located in the indoor unit secondary circuit.

4. The air conditioner indoor and outdoor unit power supply circuit according to claim 3, wherein, The indoor unit primary circuit further includes a first switching device for controlling the connection or disconnection between the indoor primary loads and the first step-down module, and the first switching device is connected to the indoor control module.

5. The power supply circuit for the indoor and outdoor units of the air conditioner according to claim 1, characterized in that, The power conversion module includes a rectification module connected to the power supply adapter, a primary winding connected to the output end of the rectification module, a first secondary winding connected to the power supply access port, and a second secondary winding for connecting to the outdoor load.

6. The air conditioner indoor and outdoor unit power supply circuit according to claim 5, characterized in that, The indoor and outdoor unit wiring base further includes a standby control port connected to the indoor control module. The power conversion module includes a second switching device for controlling the conduction or interruption of the second secondary winding, and the second switching device is connected to the standby control port.

7. The air conditioner indoor and outdoor unit power supply circuit according to claim 5, characterized in that, The power conversion module further includes an anti-interference module, and the output end of the rectification module is connected to the primary winding through the anti-interference module.

8. The air conditioner indoor and outdoor unit power supply circuit according to claim 5, characterized in that, The power conversion module further includes a power factor correction module, and the output end of the rectification module is connected to the primary winding through the power factor correction module.

9. The air conditioner indoor and outdoor unit power supply circuit according to claim 1, characterized in that, The indoor unit circuit further includes an AC power supply interface for supplying power to indoor AC loads and an AC switching device controlled by the indoor control module to be turned on or off. One switching contact of the AC switching device is connected to the AC power supply interface, and the other switching contact is connected to the power supply adapter.

10. An indoor and outdoor unit power supply device for an air conditioner, characterized in that, The indoor and outdoor unit power supply device of the air conditioner includes an indoor circuit board for installation on the indoor unit and an outdoor circuit board for installation on the outdoor unit. The indoor circuit board includes the indoor unit circuit in the indoor and outdoor unit power supply circuit according to any one of claims 1 to 9, and the outdoor circuit board includes the outdoor unit circuit in the indoor and outdoor unit power supply circuit according to any one of claims 1 to 9.

11. The air conditioner indoor and outdoor unit power supply device according to claim 10, characterized in that, The indoor circuit board includes an indoor primary circuit board and an indoor secondary circuit board. The indoor primary circuit board includes the indoor primary circuit in the indoor and outdoor unit power supply circuit as described in claim 3, and the indoor secondary circuit board includes the indoor secondary circuit in the indoor and outdoor unit power supply circuit as described in claim 3.

12. An air conditioner, characterized in that, It includes the indoor and outdoor unit power supply circuit as described in any one of claims 1 to 10 or the indoor and outdoor unit power supply device as described in any one of claims 10 to 11.

13. A control method for an air conditioner, characterized in that, The indoor control module applied to the indoor and outdoor unit power supply circuit as described in claim 4, and the control method includes: Sending a first standby signal to the first switching device to control the disconnection of the primary buck module from the indoor primary load; Or, Sending a first wake-up signal to the first switching device to control the connection of the primary buck module to the indoor primary load.

14. A control method for an air conditioner, characterized in that, The indoor control module applied to the indoor and outdoor unit power supply circuit as described in claim 6, and the control method includes: Sending a second standby signal to the second switching device through the standby control port to cut off the second secondary winding and stop supplying power to the outdoor load; Or, Sending a second wake-up signal to the second switching device through the standby control port to connect the second secondary winding and resume supplying power to the outdoor load.

15. A control method for an air conditioner, characterized in that, The indoor control module applied to the indoor and outdoor unit power supply circuit as described in claim 9, and the control method includes: Sending an AC standby signal to the AC switching device to control the disconnection of the power transfer base from the AC power supply port; Or, Sending an AC wake-up signal to the AC switching device to control the connection of the power transfer base to the AC power supply port.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute the control method of the air conditioner as described in any one of claims 13 to 15.

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