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 and an indoor control module used for driving and controlling an indoor load; the indoor and outdoor unit wire holder comprises an indoor unit power supply interface used for obtaining a direct-current power source. The outdoor unit circuit comprises a power supply access seat used for accessing an external alternating-current power supply, a power supply conversion module used for converting the 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, one output end of the power supply conversion module is connected with the indoor unit power supply interface, and the other output end of the power supply conversion module is connected with the outdoor unit power supply interface. And the other output end is used for supplying power to an outdoor load. The air conditioner indoor and outdoor unit power supply circuit architecture can be optimized, the size of an indoor side power supply circuit can be 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, device, air conditioner, control method and 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 of the air conditioning system is connected to the AC mains, and then the power is provided to the outdoor unit through a strong electrical connection line. Therefore, both the indoor unit and the outdoor unit need to be equipped with an AC / DC power conversion circuit to provide DC power for the indoor load and the outdoor load respectively. Since the voltage of the AC mains is relatively high, based on safety requirements, the distance 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 at least solve one of the technical problems existing in the prior art, and provide a power supply circuit, device, air conditioner, control method and 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 and an indoor control module for driving and controlling an indoor load. The indoor and outdoor connection socket includes an indoor unit power supply interface for obtaining DC power to supply power to the indoor load, and the indoor unit power supply interface is connected to the indoor control module;

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

[0007] The indoor and outdoor unit power supply circuit provided by the embodiment of the present invention has at least the following beneficial effects: For the case of taking power on the indoor side of the air-conditioning system in the related art, an external AC power supply is obtained by setting a power access socket in the outdoor unit circuit, and the power-taking side of the air-conditioning system is adjusted to the outdoor side. The power access socket transmits the external AC power supply to the power conversion module for rectification and bucking. Then, the two bucked 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 indoor unit power supply interface of the indoor unit circuit. Therefore, the indoor and outdoor unit power supply circuit 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 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, and the indoor unit circuit does not need to set isolation devices or increase the distance between electronic devices for the relatively high-voltage external AC power supply to meet the isolation conditions, which can reduce the size of the indoor unit circuit, and further release the internal space of the indoor unit, contributing to 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 embodiment of the present invention, the indoor unit circuit further includes a first buck module for supplying power to the indoor primary load and a second buck module for supplying power to the indoor secondary load. The input end of the first buck module is connected to the indoor unit power supply interface, and the input end of the second buck module is connected to the output end of the first buck module. 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 embodiment of the present invention, the indoor unit circuit includes an indoor unit primary circuit and an indoor unit secondary circuit. The indoor and outdoor unit wiring socket and the first buck module are located in the indoor unit primary circuit; the indoor control module and the second buck module are located in the indoor unit secondary circuit.

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

[0011] In the power conversion module provided by the embodiment of the present invention, the power conversion module includes a rectification module connected to the power access socket, a primary winding connected to the output end of the rectification module, a first secondary winding connected to the indoor unit power supply interface, 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 state 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 a load power supply port for supplying power to the indoor three-level load, and a third switching device for controlling the power on or off of the load power supply port. The load power supply port is connected to the indoor unit power supply interface through the third switching device, and the third switching device is connected to the indoor control module.

[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] The air conditioner indoor and outdoor unit power supply device provided by the embodiment of the present invention has at least the following effects: By setting a power access socket in the outdoor unit circuit to obtain an external AC power supply, the power supply side of the air conditioner system is adjusted to the outdoor side. The power access socket transmits the external AC power supply to the power conversion module through the power access socket for rectification and step-down. Then, for the two paths of stepped-down DC power supplies 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 indoor unit power supply interface of the indoor unit circuit. Therefore, the air conditioner indoor and outdoor unit power supply circuit provided by the embodiment of the present invention optimizes the power supply circuit architecture of the air conditioner indoor and outdoor units, 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 separately configured with power conversion modules to independently supply power to the indoor / outdoor loads. The indoor unit circuit does not need to set isolation devices or increase the distance between electronic devices to meet the isolation conditions for the relatively high-voltage external AC power supply, which can reduce the size of the indoor unit circuit, and further release the internal space of the indoor unit, 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. 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 the third aspect, the 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] The air conditioner provided by the embodiment of the present invention has at least the following effects: By setting a power access socket in the outdoor unit circuit to obtain an external AC power supply, the power supply side of the air conditioner system is adjusted to the outdoor side. The power access socket transmits the external AC power supply to the power conversion module for rectification and step-down. Then, for the two paths of stepped-down DC power supplies 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 indoor unit power supply interface of the indoor unit circuit. Therefore, the air conditioner indoor and outdoor unit power supply circuit provided by the embodiment of the present invention optimizes the power supply circuit architecture of the air conditioner indoor and outdoor units, 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 separately configured with power conversion modules to independently supply power to the indoor / outdoor loads. The indoor unit circuit does not need to set isolation devices or increase the distance between electronic devices to meet the isolation conditions for the relatively high-voltage external AC power supply, which can reduce the size of the indoor unit circuit, and further release the internal space of the indoor unit, contributing to the layout design of the internal space of the air conditioner system.

[0021] Fourthly, an embodiment of the present invention provides a control method for an indoor and outdoor unit power supply circuit of 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 embodiment of the first aspect above. The indoor unit circuit further includes a first-step down module for supplying power to the indoor first-level load and a second-step down module for supplying power to the indoor second-level load. The first-step down module is connected to the power access port, and the second-step down module is connected to the first-step down module. The operating power of the indoor first-level load is higher than that of the indoor second-level load. The indoor unit circuit includes an indoor first-level circuit and an indoor second-level circuit. The indoor and outdoor unit wiring socket, the power transfer socket, and the first-step down module are located in the indoor first-level circuit. The indoor control module and the second-step down module are located in the indoor second-level circuit. The indoor first-level circuit further includes a first switching device for controlling the connection or disconnection between the indoor first-level load and the first-step down module, and the first switching device is connected to the indoor control module.

[0022] The control method includes:

[0023] Sending a first standby signal to the first switching device to control the disconnection between the first-step down module and the indoor first-level load;

[0024] Or,

[0025] Sending a first wake-up signal to the first switching device to control the connection between the first-step down module and the indoor first-level 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: By setting a power access socket in the outdoor unit circuit to obtain an external AC power supply, the power supply side of the air conditioner system is adjusted to the outdoor side. The power access socket transmits the external AC power supply to the power conversion module for rectification and voltage reduction. Then, the two paths of rectified and voltage-reduced DC power supplies 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 indoor unit power supply interface 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-level load can obtain power through the first-step down module, and realize the on-off control of the indoor first-level load, that is, the standby wake-up control. 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, and further can release the internal space of the indoor unit.

[0027] Fifth aspect, an embodiment of the present invention provides a control method for the power supply circuit of the indoor and outdoor units of an air conditioner, which is applied to the indoor control module of the power supply circuit of the indoor and outdoor units of the air conditioner as described in the embodiment of the first aspect above. 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 an outdoor load. The indoor and outdoor unit wiring socket 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 state of the second secondary winding. The second switching device is connected to the standby control port;

[0028] The control method includes:

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

[0030] Or,

[0031] Sending a second wake-up signal to the second switching device through the standby control port to turn on the second secondary winding and resume power supply to the outdoor load.

[0032] According to the control method of the air conditioner provided by the embodiment of the present invention, it has at least the following effects: By setting a power access socket in the outdoor unit circuit to obtain an external AC power supply, the power supply side of the air conditioner system is adjusted to the outdoor side. The power access socket transmits the external AC power supply to the power conversion module for rectification and step-down. Then, the two paths of stepped-down DC power supplies 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 indoor unit power supply interface of the indoor unit circuit. Based on this, the indoor control module can control the second switching device to turn on or off through the standby control port, so as to realize the control of whether the outdoor load can obtain power through the second secondary winding, and realize the on-off control and standby wake-up control of the outdoor 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 circuit 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] Sixth aspect, an embodiment of the present invention provides a control method for the power supply circuit of the indoor and outdoor units of an air conditioner, which is applied to the indoor control module of the power supply circuit of the indoor and outdoor units of the air conditioner as described in the embodiment of the first aspect above. The indoor unit circuit further includes a load power supply port for supplying power to an indoor three-level load, and a third switching device for controlling the power on or off of the load power supply port. The load power supply port is connected to the indoor unit power supply interface through the third switching device, and the third switching device is connected to the indoor control module;

[0034] The control method includes:

[0035] Sending a third standby signal to the third switching device to disconnect the indoor unit power supply interface from the load power supply port;

[0036] Or,

[0037] Sending a third wake-up signal to the third switching device to connect the indoor unit power supply interface to the load power supply port.

[0038] According to the control method of the air conditioner provided by the embodiment of the present invention, it has at least the following effects: By setting a power access socket in the outdoor unit circuit to obtain an external AC power supply, the power supply side of the air conditioning system is adjusted to the outdoor side. The power access socket transmits the external AC power supply to the power conversion module for rectification and voltage reduction. Then, the two paths of rectified and voltage-reduced DC power supplies 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 indoor unit power supply interface of the indoor unit circuit. Based on this, the indoor control module can control the third switching device to be turned on or off, so as to control whether the indoor third-level load can draw power from the power transfer socket through the load power supply port, and realize the on-off control of the indoor third-level 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 indoor and outdoor unit power supply circuits 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, which stores computer-executable instructions for causing a computer to execute the control method of the air conditioner described in the embodiments of the fourth aspect to the sixth aspect 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: By setting a power access socket in the outdoor unit circuit to obtain an external AC power supply, the power supply side of the air conditioning system is adjusted to the outdoor side. The power access socket transmits the external AC power supply to the power conversion module for rectification and voltage reduction. Then, the two paths of rectified and voltage-reduced DC power supplies 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 indoor unit power supply interface of the indoor unit circuit. Based on this, the indoor control module can control the switching device to be turned on or off, 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 while simplifying the circuit part of the standby wake-up control in the indoor and outdoor unit power supply circuits 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.

[0041] Other features and advantages of the present invention will be described in the following specification, and in part will be obvious from the specification, or can be 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 specification, 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 specification. Together with the embodiments of the present invention, they are used 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 an air conditioner provided by an embodiment of the present invention;

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

[0048] Figure 5 It is a schematic structural diagram of the power conversion module provided by an embodiment of the present invention;

[0049] Figure 6 It is a schematic structural diagram of the power supply device for the indoor and outdoor units of an air conditioner provided by an embodiment of the present invention;

[0050] Figure 7 It is a schematic structural diagram of the power supply device for the indoor and outdoor units of an air conditioner provided by another embodiment of the present invention. Detailed Description of the Embodiments

[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 role of the drawings is to supplement the description in 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, but it cannot be understood as a limitation to 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 more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the base number, and understandings such as "above", "below", "within", etc. include the base number. "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 in the embodiments of the present invention, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words 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, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0056] Currently, an 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, and then a power supply is provided to the outdoor unit through a strong electrical connection line. 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 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 is relatively high, in order to reduce the occurrence of situations such as high-voltage circuit short-circuit arcing and contacts, 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. When the volume of the indoor unit is limited, 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, device, air conditioner, control method and medium for the indoor and outdoor units of an air conditioner. By setting a power supply access socket in the outdoor unit circuit to obtain an external AC power supply, the power supply side of the air conditioner system is adjusted to the outdoor side. The power supply access socket transmits the external AC power supply to the power conversion module for rectification and step-down. Then, the two paths of stepped-down DC power supplies 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 indoor unit power supply interface 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, there is no need to separately configure a power conversion module in the indoor unit circuit and the outdoor unit circuit to independently supply power to the indoor / outdoor load. There is no need to set isolation devices or increase the distance between electronic devices in the indoor unit circuit for the relatively high-voltage external AC power supply to meet the isolation conditions, which can reduce the size of the indoor unit circuit, and further release the internal space of the indoor unit, contributing to the layout design of the internal space of the air conditioner 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 1 which 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. 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 an air conditioner system, and 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 socket 112 and an indoor control module 121, and the outdoor unit circuit 200 includes a power supply access socket 201, a power conversion module 220 and an outdoor control module 210. Among them, the power supply access socket 201 is used to obtain an external AC power supply and input it to the power conversion module 220. By setting the power supply access socket 201 in the outdoor unit circuit 200 to obtain an external AC power supply, the layout of power taking and power supply is adjusted, so that there is no need to arrange corresponding electronic devices for obtaining the external AC power supply in the indoor unit circuit 100, which helps to reduce the size of the indoor unit circuit 100.

[0060] Specifically, the power access base 201 includes an AC live wire port, an AC neutral wire port, and an AC ground wire port. The external AC power supply is respectively connected to the AC live wire port, the AC neutral wire port, and the AC ground wire port of the power access base 201 through the outdoor unit AC live wire L1, the outdoor unit AC neutral wire N1, and the outdoor unit AC ground wire PE1. Thus, the power access base 201 can obtain the external AC power supply. 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 access base 201. Further, the power access base 201 can input the obtained external AC power supply into the power conversion module 220 for power conversion.

[0061] After obtaining the external AC power supply, the power conversion module 220 of the outdoor unit circuit 200 can rectify and step down the external AC power supply to obtain a stepped-down DC power supply. And the power conversion module 220 divides the stepped-down DC power supply into two output paths. One path of the power supply supplies power to the outdoor load 260 (including the outdoor control module 210) of the outdoor unit. The other output path is connected to the indoor unit power supply interface of the indoor and outdoor unit wiring base 112 in the indoor unit circuit 100 through the DC live wire and the 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 indoor unit power supply interface. Therefore, the indoor and outdoor unit power supply circuit provided by the embodiment of the present invention optimizes the power supply circuit architecture, adjusts the power supply side of the air conditioning system to the outdoor side, and reuses the power conversion module 220 of the outdoor unit circuit 200 to supply power to the indoor load, so that the indoor unit circuit 100 does not need to bear the relatively high-voltage external AC power supply, nor does it need to set isolation devices or expand the distance between electronic devices due to the external AC power supply to meet the isolation conditions. At the same time, it saves the electronic devices in the indoor unit circuit 100 and simplifies 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 set of isolated weak electric connection wire groups (including the outdoor unit DC live wire L2, the outdoor unit DC neutral wire PGND) and the indoor and outdoor unit signal wire S. Compared with the power supply circuit architecture in the related art, by adjusting the power supply taking side of the air conditioning system to the outdoor side and replacing the strong electric connection wire group originally used to carry the external AC power supply to the indoor unit circuit 100 with the outdoor unit DC live wire L2 and the outdoor unit DC neutral wire PGND in the weak electric connection wire group, the power supply of the indoor unit circuit 100 and the outdoor unit 200 is realized. There is no need to set AC / DC power conversion circuits for the indoor unit and the outdoor unit respectively, nor to provide a strong electric connection wire group between the indoor and outdoor units to shunt the external power supply obtained by the indoor unit to the outdoor unit circuit, realizing the reduction of the circuit cost while reducing the size of the indoor unit circuit 100, releasing the internal space of the indoor unit, and contributing to the layout design of the internal space of the indoor unit in the air conditioning system.

[0062] In addition, since the indoor unit circuit 100 can directly obtain the DC power supply from the outdoor unit circuit 200 without the need for power conversion of the external AC power supply, and the power supply side of the air conditioning system is adjusted to the outdoor side, that is, the power supply of the air conditioning system is realized through the power supply access socket of the outdoor unit circuit 200. The indoor unit circuit 100 no longer needs to bear the external AC power supply. Since the voltage of the DC power supply (such as a DC power supply of 5V to 30V) obtained from the outdoor unit circuit 200 is much lower than that of the external AC power supply (such as an AC power supply of 220V or 380V), dangerous situations such as circuit short - circuit and sparking caused by high voltage in the indoor unit circuit 100 can be reduced.

[0063] It should be noted that the indoor - outdoor signal line S connecting 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 - outdoor wiring socket 112 in the indoor unit circuit 100 further includes a communication port, and the indoor - outdoor signal line S is respectively connected to the outdoor control module 210 and the indoor control module 121 through the communication port.

[0064] 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 supplying power to 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 through the indoor power supply interface in the indoor unit circuit 100, so as to supply power to the indoor control module 121 and at the same time realize controlling the on - off situation of the indoor load other than the indoor control module 121 through the indoor control module 121.

[0065] 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 air conditioner indoor and outdoor unit power supply circuit 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. The display controller of the display board in the related art and the indoor unit main controller of the indoor unit board are functionally combined, and only one controller (i.e., the indoor control module 121) is used to implement the functions of the display controller and the indoor unit main controller. At this time, the electronic devices originally carried on the display board can obtain power through the indoor power supply interface of the indoor and outdoor unit wiring seat 112, further compressing the circuit size in the indoor unit and releasing the internal space of the indoor unit.

[0066] Referring to Figure 2 , Figure 2 FIG. is a schematic structural diagram of an indoor unit circuit 100 provided by another embodiment of the present invention. It can be understood that the indoor unit circuit 100 may include a plurality of step-down modules with different step-down levels. These step-down modules can be connected to the indoor power supply interface at the same time, so that the DC power supplied by the outdoor unit circuit 200 can be stepped down by the step-down modules with different step-down levels to obtain power supplies with different voltages, meeting the power consumption requirements of indoor loads with different operating powers and effectively performing energy management; these step-down modules can also be connected in sequence according to the step-down 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 a plurality of step-down modules with different step-down 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, which can not only reduce the mutual interference during the operation of indoor loads with different operating powers, 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 conditioner system, and ensure the stable operation of the equipment.

[0067] Specifically, the indoor unit circuit 100 may include a first-stage buck module 113 and a second-stage buck module 122 connected in cascade. The indoor unit includes an indoor first-stage load 114 and an indoor second-stage load 123. Among them, the operating power of the indoor first-stage load 114 is higher than that of the indoor second-stage load 123. At the same time, the operating voltage of the indoor first-stage load 114 is also higher than that of the indoor second-stage load 123. Therefore, the input end of the first-stage buck module 113 can obtain the DC power supply provided by the outdoor unit circuit 200 by connecting to the indoor unit power supply interface. After performing the first-stage buck on the DC power supply, a first-stage buck power supply is obtained. The first-stage buck module 113 is simultaneously connected to the indoor first-stage load 114 and the second-stage buck module 122, so that the indoor first-stage load 114 can obtain the first-stage buck power supply for operation, and the second-stage buck module 122 can perform the second-stage buck on the first-stage buck power supply to obtain a second-stage buck power supply. Furthermore, the output end of the second-stage buck module 122 can be connected to the indoor second-stage load 123 to provide the second-stage buck power supply for the indoor second-stage load 123. In addition, according to the operating voltage of the indoor control module 121, the indoor control module 121 can be connected to the output end of the corresponding buck module, or more cascaded buck modules can be set to obtain the corresponding power supply voltage.

[0068] Referring to Figure 3 , Figure 3 FIG. is a schematic structural 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 first-stage circuit 110 and an indoor unit second-stage circuit 120. Among them, the indoor unit first-stage circuit 110 includes an internal and external unit wiring base 112, a power access base 201, and a first-stage buck module 113. The indoor unit second-stage circuit 120 includes a second-stage buck module 122 and an indoor control module 121. It can be seen that the indoor unit first-stage circuit 110 is a circuit for carrying the power supply function of high-power low-voltage loads, and the indoor unit second-stage circuit 120 is a circuit for the power supply of low-power low-voltage loads. Among them, the high-voltage power supply refers to a power supply whose voltage is higher than the DC power supply voltage of the indoor unit power supply interface of the internal and external unit wiring base 112, such as the external AC power supply with an access voltage of 220V or 380V in the outdoor unit circuit 200; the low-voltage load refers to a load powered by the DC power supply provided by the indoor unit power supply interface of the internal and external unit wiring base 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 first-stage buck 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 first-stage buck 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 second-stage buck module 122.

[0069] Therefore, by partitioning the indoor unit circuit 100, 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 faults.

[0070] Refer to Figure 4 , Figure 4 , which 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. 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 connected to the power access socket 201 in the outdoor unit circuit 200 through the outdoor unit AC live wire L1, the outdoor unit AC neutral wire N1, and the outdoor unit AC ground wire PE1. Then, the power access socket 201 delivers the obtained external AC power supply 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). Then, the DC power supply after anti-interference processing is input to the primary winding 221, and 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 indoor unit power supply interface of the indoor and outdoor unit connection socket 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.

[0071] 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 can be connected to the outdoor step-down module 240, and a part of the DC power supply output by the second secondary winding 223 is delivered to some high-power outdoor loads 260, and another part of the DC power supply is input to the outdoor step-down module 240 for further stepping down, and then the DC power supply after secondary stepping down is delivered to some low-power outdoor loads 260.

[0072] After the first secondary winding 222 delivers the stepped-down DC power supply to the indoor power supply interface through the outdoor DC live wire L2 and the outdoor DC neutral wire PGND, some indoor third-level loads (such as the indoor fan) that require working voltage can directly obtain the DC power supply through the indoor power supply interface. The indoor first-level load 114 (such as the motor and relay in the indoor unit) can draw power and operate through the first-level buck module 113 connected to the indoor power supply interface, while the indoor second-level load 123 (such as the temperature and humidity sensor, voice module, buzzer, etc.) located in the indoor unit secondary circuit 120 draws power through the second-level buck module 122 cascaded with the first-level buck module 113. At the same time, the indoor loads (including the indoor first-level load 114 and the indoor load) are all controlled to start or stop by the indoor control module 121.

[0073] Among them, the outdoor control module 210 is connected to the indoor control module 121 through the current loop communication circuit. Specifically, the current loop communication circuit is composed of the outdoor DC neutral wire PGND and the indoor and outdoor machine signal wire S. Among them, the indoor and outdoor machine access socket can also be provided with a communication port connected to the indoor control module 121. The outdoor control module 210 is connected to the indoor and outdoor machine signal wire S, and then connected to the communication port through the indoor and outdoor machine signal wire S. At the same time, the indoor control module 121 is also connected to the outdoor DC neutral wire PGND in the indoor power supply interface, so that the outdoor control module 210 and the indoor control module 121 can achieve communication.

[0074] Refer to Figure 4 , it can be understood that the indoor unit primary circuit 110 also 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, and 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 then realize the standby control of the indoor first-level load 114.

[0075] It can be understood that the indoor unit further includes indoor tertiary loads directly powered by the DC power supply converted by the power conversion module 220. For example, after the power conversion module 220 converts the external AC power supply, a DC power supply with a voltage of 24V to 30V can be obtained. At this time, the power conversion module 220 has already performed a step-down conversion on the external AC power supply. However, the indoor primary load 114 still requires the primary step-down module 113 to further step down the DC power supply delivered by the power conversion module 220 to the indoor unit circuit 100 to obtain a DC power supply with a voltage of 12V. The indoor secondary load 123 requires the secondary step-down module 122 to step down the DC power supply stepped down by the primary step-down module 113 again to obtain a DC power supply with a voltage of 5V as the power supply. Therefore, it can be seen that the operating powers of both the indoor primary load 114 and the indoor secondary load 123 are low. Compared with the indoor primary load 114 and the indoor secondary load 123, indoor tertiary loads such as the indoor fan require a DC power supply with a voltage of 24V to 30V, that is, the indoor tertiary loads need to use the DC power supply provided by the power conversion module 220 after conversion to the indoor and outdoor unit connection base as the power supply, and the operating power of the indoor tertiary loads is relatively high. Therefore, in the indoor unit circuit 100, a load power supply interface 115 for powering these indoor tertiary loads can be reserved. The load power supply interface 115 can be directly connected to the power supply connection base 201, that is, the load power supply interface 115 can be connected to the external unit DC live wire L2, so that the indoor tertiary loads can obtain a relatively high-voltage DC power supply through the load power supply interface 115 and the power supply connection base 201.

[0076] To facilitate the indoor control module 121 to control the on / off of the indoor tertiary loads, a third switching device 117 can also be provided in the indoor unit circuit 100. The control end of the third switching device 117 is connected to the indoor control module 121, and one switching contact of the third switching device 117 is connected to the load power supply interface 115, and the other switching contact is connected to the power supply connection base 201. Thus, the indoor control module 121 can control the on / off of the third switching device 117, and further control the load power supply interface 115 to be powered on or off, which is beneficial to improving the safety of the indoor unit circuit 100.

[0077] Refer 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 standby control ports, 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, causing the second secondary winding 223 to be open-circuited, and the outdoor load 260 cannot obtain power and stops operating, realizing standby control.

[0078] 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 and 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 AC live wire port (i.e., the port in the power access socket 201 connected to the outdoor unit AC live wire L1) and the AC ground wire port (i.e., the port in the power access socket 201 connected to the outdoor unit AC ground wire PE1), and a filter capacitor C2 connected between the AC neutral wire port (i.e., the port in the power access socket 201 connected to the outdoor unit AC neutral wire N1) and the AC ground wire port.

[0079] 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, it can also reduce pollution and environmental impact.

[0080] 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 a power factor correction module in the power supply circuit of the indoor unit to improve the power utilization efficiency. In the power supply circuit of the indoor and outdoor units of the air conditioner provided in the embodiments of the present invention, the power supply of the air conditioner system is obtained through the power access socket 201 provided in the outdoor unit circuit 200. Moreover, the power conversion module 220 of the outdoor unit converts the obtained external AC power, and then provides one of the converted DC power supplies to the indoor unit circuit 100 as the power supply for the indoor unit circuit 100. 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.

[0081] 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. Refer 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 can 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 can 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 conditioner system, and the outdoor circuit board 400 is installed in the outdoor unit of the air conditioner system. Regarding the situation of taking power on the indoor side of the air conditioner system in the related art, by adjusting the power taking interface, a power access socket 201 is provided on the outdoor circuit board 400 to obtain external AC power, realizing power taking from the outdoor side of the air conditioner system. The power access socket 201 transmits the external AC power to the power conversion module 220 in the outdoor unit circuit 200 for rectification and voltage reduction. Then, for the two paths of DC power supplies after voltage reduction 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 indoor unit power supply interface of the indoor unit circuit 100.

[0082] Therefore, by optimizing the power supply circuit architecture of the indoor and outdoor units of the air conditioner, on the basis of reducing the size of the indoor unit circuit 100 by replacing the power-taking side of the air conditioner system, the power conversion module 220 of the outdoor circuit board 400 can also be reused 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 no longer bears the external AC power supply, nor does it need to set isolation devices or expand the distance between electronic devices due to the external AC power supply to meet the isolation conditions. At the same time, the electronic devices in the indoor unit circuit 100 are saved, and the complexity of the indoor unit circuit 100 is simplified. At this time, the indoor circuit board 300 and the outdoor circuit board 400 only need to be connected through a set of isolated weak-current connection wire groups (including the outdoor unit DC live wire L2 and the outdoor unit DC neutral wire PGND) and the indoor and outdoor unit signal wire S. Compared with the power supply circuit architecture in the related art, by adjusting the power-taking side of the air conditioner system to the outdoor side and adding the outdoor unit DC live wire L2 and the outdoor unit DC neutral wire PGND in the weak-current connection wire group, the power supply of the indoor unit circuit 100 and the outdoor unit 200 is realized. There is no need to separately set up AC-DC power conversion circuits for the indoor unit and the outdoor unit, nor to provide a strong-current connection wire group between the indoor and outdoor units to shunt the external power obtained by the indoor unit to the outdoor unit circuit, achieving the reduction of the circuit cost while reducing the size of the indoor unit circuit 100 and releasing the internal space of the indoor unit, which is helpful for the layout design of the internal space of the indoor unit in the air conditioner system.

[0083] 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 used to carry 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. 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 air conditioner indoor and outdoor unit power supply device 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. The display controller of the display board in the related art and the indoor unit main controller of the indoor unit board are functionally combined, and only one controller (i.e., the indoor control module 121) is used to realize the functions of the display controller and the indoor unit main controller. At this time, the electronic devices originally carried on the display board can obtain power through the indoor power supply interface of the indoor and outdoor unit wiring seat 112, further compressing the size of the circuit in the indoor unit and releasing the internal space of the indoor unit.

[0084] Refer to Figure 7 , Figure 7Schematic structural 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 an indoor unit primary circuit 110 for carrying the power supply function of high-power low-voltage loads and an indoor unit secondary circuit 120 for supplying power to 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 achieve circuit grading by separating the indoor unit circuit 100 on different circuit boards, more effectively reducing the electromagnetic interference between electrical components, improving the stability and electromagnetic compatibility of the indoor unit circuit 100. At the same time, by separating the two circuit boards, the sizes of the indoor unit primary circuit 110 and the indoor primary circuit board 310 can be further compressed, facilitating the design of the internal space of the indoor unit.

[0085] 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 speeds, reduce system latency, improve the performance of the air conditioner system, and at the same time help save energy consumption and reduce costs.

[0086] In a third aspect, an embodiment of the present invention further provides an air conditioner, which may include the indoor and outdoor unit power supply circuit of the above embodiment, or include the indoor and outdoor unit power supply device of the above embodiment. In view of the situation of taking power on the indoor side of the air conditioning system in the related art, by adjusting the power taking interface, a power access socket 201 is provided on the outdoor circuit board 400 to obtain an external AC power supply, so as to realize taking power from the outdoor side of the air conditioning system. The power access socket 201 transmits the external AC power supply to the power conversion module 220 in the outdoor unit circuit 200 for rectification and step-down. 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 indoor unit power supply interface of the indoor unit circuit 100. Therefore, the indoor and outdoor unit power supply circuit provided by the embodiment of the present invention optimizes the architecture of the indoor and outdoor unit power supply circuit. While adjusting the power taking side of the air conditioning system to compress the size of the indoor unit circuit 100, the power conversion module 220 of the outdoor unit circuit 200 is reused to supply power to the indoor load. Thus, the indoor unit circuit 100 and the outdoor unit circuit 200 do not need to be respectively configured with a power conversion module 220 to independently supply power to the indoor / outdoor load. The indoor unit circuit 100 does not need to carry the external AC power supply, and the indoor unit circuit 100 does not need to be provided with isolation devices or increase the distance between electronic devices to meet the isolation conditions for the relatively high-voltage external AC power supply, which can further reduce the size of the indoor unit circuit 100, and further release the internal space of the indoor unit, contributing to the layout design of the internal space of the air conditioning system.

[0087] Based on the above indoor and outdoor unit power supply circuit, each embodiment of the control methods in the fourth, fifth, and sixth aspects of the present invention is respectively proposed.

[0088] An embodiment of the fourth aspect of the present invention provides a control method for an air conditioner. The control method for the air conditioner can be applied to an indoor control module of the indoor and outdoor unit power supply circuit as Figure 4 shown, and the control method includes but is not limited to step S110 and step S120:

[0089] Step S110: Send a first standby signal to the first switching device to control the disconnection of the first step-down module and the indoor first-level load;

[0090] Or,

[0091] Step S120: Send a first wake-up signal to the first switching device to control the connection of the first step-down module and the indoor first-level load.

[0092] 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 primary load 114, and the other switching contact is connected to the output end of the primary step-down 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 primary load 114, and further realizing the standby control of the indoor primary load 114. Specifically, the indoor control module 121 can send a first standby signal to the control end of the first switching device 116, making the two switching contacts of the first switching device 116 open, so that the indoor primary load 114 is disconnected from the output end of the primary step-down module 113. Further, the indoor primary load 114 cannot draw power from the output end of the primary step-down module 113 and stops operating, realizing the standby control of the indoor primary 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, making the two switching contacts of the first switching device 116 close, so that the indoor primary load 114 is reconnected to the output end of the primary step-down module 113. Further, the indoor primary load 114 can draw power from the output end of the primary step-down module 113 and resume operation, realizing the wake-up control of the indoor primary load 114. Therefore, the first switching device 116 can be controlled to be turned on or off by the indoor control module 121, thereby realizing the on-off control of the indoor primary load 114, and further realizing the standby wake-up control of the indoor primary 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 of the indoor and outdoor units of the air conditioner, facilitating the reduction of the size of the indoor unit circuit 100, and further releasing the internal space of the indoor unit.

[0093] An embodiment of the fifth aspect of the present invention provides a control method for an air conditioner. The control method for the air conditioner can be applied to an indoor control module of an indoor and outdoor unit power supply circuit of an air conditioner as shown in Figure 4 The control method includes, but is not limited to, step S210 and step S220:

[0094] Step S210: Send a second standby signal to the second switching device through the standby control port to cut off the second secondary winding from supplying power to the outdoor load;

[0095] Or,

[0096] Step S220: Send a second wake-up signal to the second switching device through the standby control port to connect the second secondary winding to resume supplying power to the outdoor load.

[0097] It can be understood that 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. Thus, the indoor control module 121 can cut off or close the second secondary winding 223 by controlling the on / off of the second switching device 250, so as to control the power supply situation of the outdoor load 260. 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 buck module 240, and the outdoor load 260 cannot obtain power through the outdoor buck module 240 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 restored to be connected, so that the second secondary winding 223 is connected to the outdoor buck module 240. Furthermore, the outdoor buck module 240 can step down the power supply output by the second secondary winding 223 and provide it to the outdoor load 260, enabling the outdoor load 260 to obtain power 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 power-on and power-off situation of the outdoor load 260, and further realize the standby wake-up control of the outdoor load 260, which 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, is beneficial to reducing the size of the indoor unit circuit 100, and further can free up the internal space of the indoor unit.

[0098] An embodiment of the sixth aspect of the present invention provides a control method for an air conditioner. The control method for the air conditioner can be applied to an indoor control module of the power supply circuit of the indoor and outdoor units of the air conditioner as shown in Figure 4 The control method includes, but is not limited to, step S310 and step S320:

[0099] Step S310: Send a third standby signal to the third switching device to control the disconnection between the indoor power supply interface and the load power supply port;

[0100] Or,

[0101] Step S320: Send a third wake-up signal to the third switching device to control the connection between the indoor power supply interface and the load power supply port.

[0102] It can be understood that the control terminal of the third switching device 117 is connected to the indoor control module 121, and one switching contact of the third switching device 117 is connected to the load power supply interface 115, and the other switching contact is connected to the power supply access socket 201. Thus, the indoor control module 121 can control the on / off of the third switching device 117, and further control the power-on or power-off of the load power supply interface 115.

[0103] Specifically, the indoor control module 121 can send a third standby signal to the control terminal of the third switching device 117, so that the two contacts of the third switching device 117 are disconnected, and the load power supply interface 115 is disconnected from the power supply access socket 201. At this time, the load power supply interface 115 is in a power-off state, that is, the indoor third-level load cannot obtain power from the load power supply interface 115, realizing the standby control of the indoor third-level load. In addition, the indoor control module 121 can also send a third wake-up signal to the control terminal of the third switching device 117, so that the two contacts of the third switching device 117 are restored to be connected, and the load power supply interface 115 can be connected to the power supply access socket 201 to obtain power. At this time, the load power supply interface 115 is in a power-on state, that is, the indoor third-level load can obtain power from the load power supply interface 115, realizing the wake-up control of the indoor third-level load. Therefore, the third switching device 117 can be controlled to be turned on or off by the indoor control module 121, so as to realize the control of the power-on and power-off of the indoor third-level load, and further realize the standby wake-up control of the indoor third-level load, which 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.

[0104] In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer-executable instructions for causing a computer to execute the control method of the air conditioner according to the fourth aspect to the seventh aspect of the above embodiments, such as executing the method step S110 or step S120 in the embodiment of the fourth aspect, or executing the method step S210 or step S220 in the embodiment of the fifth aspect, or executing the method step S310 or step S320 in the embodiment of the sixth aspect.

[0105] According to the computer-readable storage medium provided by the embodiments of the present invention, an external AC power supply is obtained by setting a power access socket in the outdoor unit circuit, and the power supply side of the air-conditioning system is adjusted to the outdoor side. The power access socket transmits the external AC power supply to the power conversion module for rectification and step-down. Then, two paths of stepped-down DC power supplies 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 indoor power supply interface of the indoor unit circuit. Based on this, the switch 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 at the same time simplify the circuit part of the standby wake-up control in the indoor and outdoor unit power supply circuits 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.

[0106] 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 can be implemented as hardware, or can be 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 include, but are 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, a communication medium generally 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.

[0107] The above has described the embodiments of the present invention in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present invention.

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 connection base and an indoor control module for driving and controlling indoor loads. The indoor and outdoor unit connection base includes an indoor unit power supply interface for obtaining a DC power supply to supply power to the indoor loads, and the indoor unit power supply interface is connected to the indoor control module; An outdoor unit circuit, including a power supply access base for accessing an external AC power supply, a power conversion module for converting and outputting two stepped-down DC power supplies from the external AC power supply, 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 access base, one output end of the power conversion module is connected to the indoor unit power supply interface, and the other output end is used to supply power to the outdoor loads.

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 input end of the first-step-down module is connected to the indoor unit power supply interface, the input end of the second-step-down module is connected to the output end of 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 power supply circuit for the indoor and outdoor units of the air conditioner according to claim 2, wherein The indoor unit circuit includes an indoor unit primary circuit and an indoor unit secondary circuit. The indoor and outdoor unit connection base 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 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 air conditioner indoor and outdoor unit power supply circuit according to claim 1, characterized in that, The power conversion module includes a rectification module connected to the power supply access base, a primary winding connected to the output end of the rectification module, a first secondary winding connected to the indoor unit power supply interface, and a second secondary winding for connecting to the outdoor loads.

6. The air conditioner indoor and outdoor unit power supply circuit according to claim 5, characterized in that, The indoor and outdoor unit 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 interruption of the second secondary winding, and the second switching device is connected to the standby control port.

7. The power supply circuit for the indoor and outdoor units of the air conditioner according to claim 5, wherein 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 power supply circuit for the indoor and outdoor units of the air conditioner according to claim 1, characterized in that, The indoor unit circuit further includes a load power supply port for supplying power to indoor tertiary loads and a third switching device for controlling the energization or de-energization of the load power supply port. The load power supply port is connected to the indoor unit power supply interface through the third switching device, and the third switching device is connected to the indoor control module.

10. An air conditioner indoor and outdoor unit power supply device, characterized in that, The indoor and outdoor unit power supply device of the air conditioner includes an indoor circuit board for installation in the indoor unit and an outdoor circuit board for installation in the outdoor unit. The indoor circuit board includes the indoor unit circuit in the indoor and outdoor unit power supply circuit as described in 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 as described in 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 the power supply circuit of the indoor and outdoor units of 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, 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 the power supply circuit of an air conditioner indoor unit and outdoor unit, characterized in that, The indoor control module applied to the indoor and outdoor unit power supply circuit as described in claim 6, 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 the power supply circuit of the indoor and outdoor units of 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, the control method includes: Sending a third standby signal to the third switching device to control the disconnection of the indoor unit power supply interface from the load power supply port; Or, Sending a third wake-up signal to the third switching device to control the connection of the indoor unit power supply interface to the load power supply port.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to execute the control method of the indoor and outdoor unit power supply circuit as described in any one of claims 13 to 15.

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