Refrigerant leakage control method and device, and air conditioner and computer-readable storage medium

Abstract

Provided are a refrigerant leakage control method and device, and an air conditioner, a computer-readable storage medium, a computer program product and a computer program. The refrigerant leakage control method is applied to the air conditioner. The air conditioner comprises an indoor unit and an outdoor unit, and further comprises a wired controller and an indoor-unit universal conversion board in communication connection with the wired controller, wherein the indoor-unit universal conversion board is in communication connection with the indoor unit, and is provided with a first communication port in communication connection with the outdoor unit. The refrigerant leakage control method comprises: acquiring a refrigerant leakage concentration of an indoor unit; and according to the refrigerant leakage concentration of the indoor unit being greater than or equal to a preset leakage protection threshold value, controlling an internal fan to operate at a preset wind speed, and controlling an indoor-unit universal conversion board to output a compressor shutdown signal to an outdoor unit by means of a first communication port in order to shut down a compressor.

Description

Refrigerant leakage control method, device, air conditioner and computer-readable storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310768620.9 filed on June 27, 2023, entitled “Refrigerant leakage control method, device, air conditioner and computer-readable storage medium” and Chinese patent application No. 2023112666192 filed on September 26, 2023, entitled “Refrigerant leakage control method, device, air conditioner and computer-readable storage medium”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of air conditioning, and in particular to a refrigerant leakage control method, device, air conditioner, computer-readable storage medium, computer program product, and computer program. Background Art

[0004] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0005] Due to the influence of factors such as climate and building structure, some air conditioners in the existing market, such as in North America, will mainly use R454B refrigerant to replace R410A refrigerant. R454B refrigerant is a flammable refrigerant, so a refrigerant sensor needs to be installed for refrigerant leakage detection. When the refrigerant leakage value exceeds the refrigerant leakage protection threshold, the indoor and outdoor units need to respond in time according to the established protection procedures.

[0006] In the prior art, American-style ducted air conditioners in North America typically lack communication between the indoor and outdoor units. This results in the outdoor unit failing to respond to protection procedures when a refrigerant leak occurs in the indoor unit. Furthermore, the North American market is primarily a replacement market, where users do not replace both indoor and outdoor units together, but rather only replace one unit or the other. However, when users need to upgrade to a new product, existing control methods cannot implement the refrigerant leak protection function, forcing users to replace both the indoor and outdoor units simultaneously, resulting in high replacement costs.

[0007] Summary of the Invention

[0008] The present disclosure aims to provide a refrigerant leakage control method, apparatus, air conditioner, computer-readable storage medium, computer program product, and computer program to at least address the technical problem of the indoor and outdoor units of American-style ducted air conditioners for the North American market not communicating with each other, resulting in the outdoor unit failing to respond to protection procedures when a refrigerant leak occurs in the indoor unit. This objective is achieved through the following technical solutions:

[0009] A first embodiment of the present disclosure provides a refrigerant leakage control method for an air conditioner, the air conditioner comprising an indoor unit and an outdoor unit, the outdoor unit being provided with an outdoor fan and a compressor, the indoor unit being provided with an indoor fan, the air conditioner further comprising an indoor unit universal conversion board electrically connected to the indoor unit, and the indoor unit universal conversion board being provided with a first communication port electrically connected to the compressor. The refrigerant leakage control method for the air conditioner comprises:

[0010] Obtaining the refrigerant leakage concentration of the indoor unit; and

[0011] Based on the refrigerant leakage concentration of the indoor unit being greater than or equal to a preset leakage protection threshold, the indoor fan is controlled to operate at a preset wind speed, and the indoor unit universal conversion board is controlled to output a compressor shutdown signal to the outdoor unit through the first communication port to shut down the compressor.

[0012] According to the refrigerant leakage control method of the air conditioner provided by the embodiment of the present disclosure, a wired controller and a universal conversion board for the indoor unit that is communicatively connected to the wired controller are added, the universal conversion board for the indoor unit is communicatively connected to the indoor unit, and the universal conversion board for the indoor unit is provided with a first communication port that is communicatively connected to the outdoor unit, so that the outdoor unit can be communicatively connected to the indoor unit through the first communication port, and then, when a refrigerant leakage occurs in the indoor unit and the refrigerant leakage concentration exceeds a preset leakage protection threshold, the outdoor unit can execute the refrigerant protection program in time to reduce the risk of ignition or explosion of the indoor unit.

[0013] Specifically, by acquiring the refrigerant leakage concentration in the indoor unit in real time, which can be monitored by a refrigerant sensor installed in the indoor unit, the system detects that the refrigerant leakage concentration is greater than or equal to a preset leakage protection threshold, posing a safety risk of ignition or explosion. At this point, the indoor fan is forced to operate at a preset wind speed, thereby blowing the refrigerant in the indoor unit into the indoor room, reducing the refrigerant concentration in the indoor unit. Simultaneously, the indoor unit universal switch board is controlled to output a compressor shutdown signal to the outdoor unit via a first communication port, forcing the compressor to shut down, preventing the compressor from continuing to supply refrigerant to the indoor unit. This allows the refrigerant leakage concentration in the indoor unit to rapidly decrease with the operation of the indoor fan, thereby reducing the risk of ignition or explosion in the indoor unit. Furthermore, the addition of the indoor unit universal switch board allows the indoor unit to adapt to different types of outdoor units. This eliminates the need to replace the indoor unit when the outdoor unit needs to, helping to reduce product replacement costs.

[0014] As can be understood, the indoor unit can output a power supply signal to the wired controller, which is then connected to the universal converter board of the indoor unit, thereby enabling the universal converter board to receive and output a compressor shutdown signal. Furthermore, the wired controller can also output an indoor fan start signal to the indoor unit via the universal converter board.

[0015] In addition, the refrigerant leakage control method for an air conditioner according to an embodiment of the present disclosure may also have the following additional technical features:

[0016] In some embodiments, the refrigerant leakage control method for an air conditioner further includes:

[0017] According to the refrigerant leakage concentration of the indoor unit being less than the preset leakage protection threshold, the indoor unit universal conversion board is controlled to output a compressor standby or running signal to the outdoor unit through the first communication port, so that the compressor maintains the current operating state.

[0018] In some embodiments, after the step of obtaining the refrigerant leakage concentration of the indoor unit, the refrigerant leakage control method for the air conditioner further includes:

[0019] Controlling an alarm state to be turned on according to the refrigerant leakage concentration of the indoor unit being greater than or equal to a preset alarm threshold;

[0020] The preset alarm threshold is smaller than the preset leakage protection threshold.

[0021] In some embodiments, in the step of controlling the internal fan to operate at a preset wind speed, the preset wind speed is the highest wind speed of the internal fan.

[0022] In some embodiments, the refrigerant leakage control method for an air conditioner further includes:

[0023] Control the external fan to operate for a preset time.

[0024] An embodiment of the second aspect of the present disclosure provides a control device for an air conditioner, comprising: a memory and a processor, wherein the memory is configured to store a computer program, and when the computer program is executed by the processor, the steps of the refrigerant leakage control method for the air conditioner are implemented as described in any embodiment of the first aspect.

[0025] A third embodiment of the present disclosure provides an air conditioner, comprising:

[0026] An indoor unit and an outdoor unit, wherein the outdoor unit is provided with an external fan and a compressor, and the indoor unit is provided with an internal fan;

[0027] A wired controller and a universal conversion board for indoor units, wherein the universal conversion board for indoor units is communicatively connected to the indoor unit and the wired controller respectively, and the universal conversion board for indoor units is provided with a first communication port electrically connected to the compressor;

[0028] a refrigerant sensor, disposed in the indoor unit; and

[0029] A control device for an air conditioner as described in any embodiment of the second aspect, wherein the control device is electrically connected to the universal conversion board of the indoor unit, the outdoor fan, the compressor, the indoor fan and the refrigerant sensor, and is used to implement the refrigerant leakage control method for the air conditioner as described in any embodiment of the first aspect when executing a computer program.

[0030] In some embodiments, the indoor unit universal conversion board is further provided with a refrigerant sensor signal port, and the refrigerant sensor signal port is electrically connected to the refrigerant sensor.

[0031] In some embodiments, the wired controller, the indoor unit universal conversion board, the indoor unit and the outdoor unit are all provided with a common port, the common port on the wired controller is communicatively connected to the common port on the indoor unit universal conversion board, and the common port on the indoor unit universal conversion board is communicatively connected to the common port on the outdoor unit.

[0032] In some embodiments, the wired controller, the indoor unit universal conversion board, the indoor unit and the outdoor unit are all provided with a defrost signal port, and the defrost signal ports on the wired controller and the outdoor unit are communicatively connected with the defrost signal port on the indoor unit universal conversion board.

[0033] In some embodiments, the wired controller, the indoor unit universal conversion board, the indoor unit and the outdoor unit are all provided with a four-way valve reversing signal port, and the common port on the wired controller and the outdoor unit is communicatively connected with the four-way valve reversing signal port on the indoor unit universal conversion board.

[0034] In some embodiments, the indoor unit, the indoor unit universal conversion board and the wired controller are all provided with power supply signal ports, and the power supply signal ports are communicatively connected with each other.

[0035] In some embodiments, the wired controller is also provided with the first communication port, and the first communication port of the wired controller is communicatively connected to the first communication port on the universal conversion board of the internal unit.

[0036] In some embodiments, the wired controller, the indoor unit universal conversion board and the outdoor unit are all provided with a first operating frequency signal port and a second operating frequency signal port, the first operating frequency signal ports are communicatively connected to each other, and the second operating frequency signal ports are communicatively connected to each other.

[0037] An embodiment of the fourth aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by the processor, the refrigerant leakage control method for the air conditioner as described in any embodiment of the first aspect is implemented.

[0038] A fifth aspect of the present disclosure provides a computer program product, including a computer program, which, when executed by a processor, implements the refrigerant leakage control method for an air conditioner as described in any embodiment of the first aspect.

[0039] An embodiment of a sixth aspect of the present disclosure provides a computer program, including computer program code. When the computer program code is run on a computer, the computer executes the refrigerant leakage control method for the air conditioner as described in any embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0041] FIG1 schematically shows a flow chart of a refrigerant leakage control method for an air conditioner according to some embodiments of the present disclosure;

[0042] FIG2 schematically shows a flow chart of a refrigerant leakage control method for an air conditioner according to some embodiments of the present disclosure;

[0043] FIG3 schematically shows a flow chart of a refrigerant leakage control method for an air conditioner according to some embodiments of the present disclosure;

[0044] FIG4 schematically shows a flow chart of a refrigerant leakage control method for an air conditioner according to some embodiments of the present disclosure;

[0045] FIG5 schematically shows a schematic diagram of signal line connections between an indoor unit, a wired controller, and an outdoor unit according to some embodiments of the present disclosure;

[0046] FIG6 schematically shows a schematic diagram of signal line connections between an indoor unit, a wired controller, and an outdoor unit according to some embodiments of the present disclosure;

[0047] FIG7 schematically shows a schematic diagram of signal line connections between an indoor unit, a wired controller, and an outdoor unit according to some embodiments of the present disclosure;

[0048] FIG8 schematically shows a schematic diagram of signal line connections between an indoor unit, a wired controller, and an outdoor unit according to some embodiments of the present disclosure;

[0049] FIG9 schematically shows a structural schematic block diagram of an air conditioner provided according to some embodiments of the present disclosure;

[0050] FIG10 schematically shows a structural schematic block diagram of a control device provided according to some embodiments of the present disclosure.

[0051] The reference numerals are as follows:

[0052] 100. Air conditioner; 200. Control device;

[0053] 110, indoor unit; 120, wired controller; 130, outdoor unit; 140, universal conversion board for indoor unit; 150, refrigerant sensor; 160, alarm;

[0054] 210. Processor; 220. Memory;

[0055] 111, internal fan; 151, first operating frequency signal port; 152, second operating frequency signal port;

[0056] 11. Power supply signal port; 12. Common port; 13. Internal fan start signal port; 14. Four-way valve reversing signal port; 15. First communication port; 16. Defrost signal port; 17. Refrigerant sensor signal port. DETAILED DESCRIPTION

[0057] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0058] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0059] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0060] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0061] Please refer to Figure 1. The first aspect of the present disclosure proposes a refrigerant leakage control method for an air conditioner. The air conditioner includes an indoor unit and an outdoor unit. The outdoor unit is provided with an outdoor fan and a compressor. The indoor unit is provided with an indoor fan. The air conditioner also includes an indoor unit universal conversion board. The indoor unit universal conversion board is electrically connected to the indoor unit, and the indoor unit universal conversion board is provided with a first communication port electrically connected to the compressor. The refrigerant leakage control method for the air conditioner includes steps S10 to S30.

[0062] Step S10: Obtain the refrigerant leakage concentration of the indoor unit.

[0063] Step S20: Determine whether the refrigerant leakage concentration of the indoor unit is greater than or equal to a preset leakage protection threshold.

[0064] Step S30: Based on the refrigerant leakage concentration of the indoor unit being greater than or equal to the preset leakage protection threshold, the indoor fan is controlled to operate at a preset wind speed, and the indoor unit universal conversion board is controlled to output a compressor shutdown signal to the outdoor unit through the first communication port to shut down the compressor.

[0065] In this embodiment, the refrigerant leakage control method of the air conditioner provided by the embodiment of the present disclosure is achieved by adding a wired controller and a universal conversion board for the indoor unit that is communicatively connected to the wired controller. The universal conversion board for the indoor unit is communicatively connected to the indoor unit, and the universal conversion board for the indoor unit is provided with a first communication port that is communicatively connected to the outdoor unit, so that the outdoor unit can be communicatively connected to the indoor unit through the first communication port. Further, when a refrigerant leakage occurs in the indoor unit and the refrigerant leakage concentration exceeds the refrigerant leakage protection threshold, the outdoor unit can execute the refrigerant protection program in time to reduce the risk of ignition or explosion of the indoor unit.

[0066] Specifically, by acquiring the refrigerant leakage concentration of the indoor unit in real time, the refrigerant leakage concentration of the indoor unit can be monitored by a refrigerant sensor provided in the indoor unit, and based on the refrigerant leakage concentration being greater than or equal to a preset leakage protection threshold, the refrigerant in the indoor unit is blown indoors by controlling the indoor fan to run at a preset wind speed forcibly, so as to reduce the refrigerant concentration of the indoor unit, and the indoor unit universal conversion board is controlled to output a compressor shutdown signal to the outdoor unit through the first communication port, so that the compressor is forced to shut down, thereby preventing the compressor from continuing to supply refrigerant to the indoor unit, so that the refrigerant leakage concentration in the indoor unit is rapidly reduced under the operation of the indoor fan, thereby reducing the risk of ignition or explosion of the indoor unit, and

[0067] Due to the addition of a universal conversion board for the indoor unit, the indoor unit can adapt to different types of outdoor units through the universal conversion board. Therefore, when the outdoor unit needs to be replaced, there is no need to replace the indoor unit, which helps to reduce the replacement cost of the product.

[0068] As can be understood, the indoor unit can output a power supply signal to the wired controller, which is then connected to the universal converter board of the indoor unit, thereby enabling the universal converter board to receive and output a compressor shutdown signal. Furthermore, the wired controller can also output an indoor fan start signal to the indoor unit via the universal converter board.

[0069] Referring to FIG. 2 , according to some embodiments of the present disclosure, the refrigerant leakage control method for an air conditioner further includes:

[0070] Step S40: Based on the refrigerant leakage concentration of the indoor unit being less than the preset leakage protection threshold, the universal conversion board of the indoor unit is controlled to keep outputting the compressor operation signal to the outdoor unit through the first communication port, so that the compressor maintains the current operation state.

[0071] In this embodiment, it can be understood that if the refrigerant leakage concentration of the indoor unit is less than the preset leakage protection threshold, it means that there is no refrigerant leakage in the indoor unit, or the refrigerant leakage concentration is small, and the refrigerant leakage protection program is not triggered at this time, then the universal conversion board of the indoor unit is controlled to keep outputting the compressor operation signal through the first communication port, so that the compressor maintains the current operating state, and the indoor fan maintains the current wind speed operation.

[0072] Referring to FIG. 3 , according to some embodiments of the present disclosure, after the step of obtaining the refrigerant leakage concentration of the indoor unit, the refrigerant leakage control method for the air conditioner further includes:

[0073] Step S50: Controlling an alarm state to be turned on according to the refrigerant leakage concentration of the indoor unit being greater than or equal to a preset alarm threshold;

[0074] The preset alarm threshold is lower than the preset leakage protection threshold.

[0075] In this embodiment, illustratively, the air conditioner further includes an alarm device, which may be an alarm that uses voice broadcasting or emits warning lights.

[0076] It's worth noting that when the alarm is activated, the refrigerant leakage concentration in the indoor unit falls below the preset leakage alarm threshold, prompting operators to promptly inspect and repair the indoor unit. In response to detecting that the refrigerant leakage concentration in the indoor unit has reached the preset leakage protection threshold, the refrigerant leakage protection program is immediately activated. In response to the refrigerant leakage concentration falling below the preset leakage protection threshold again, the alarm device is deactivated.

[0077] According to some embodiments of the present disclosure, in the step of controlling the internal fan to operate at a preset wind speed, the preset wind speed is the highest wind speed of the internal fan.

[0078] Referring to FIG. 4 , according to some embodiments of the present disclosure, the refrigerant leakage control method for an air conditioner further includes:

[0079] Step S60: Control the outdoor fan to operate for a preset time.

[0080] In this embodiment, illustratively, the preset duration can be set within the range of 3 minutes to 15 minutes.

[0081] The compressor generates a lot of heat during operation. When the compressor suddenly stops, the temperature of the outdoor unit is still high. At this time, the outdoor fan is controlled to continue running for a preset time, for example, 5 minutes, 10 minutes or 15 minutes, to maintain continuous heat dissipation of the outdoor unit after the compressor stops. After running for the preset time, the outdoor fan is controlled to stop running, which helps to ensure the performance of various equipment components in the outdoor unit such as the compressor, outdoor heat exchanger, etc.

[0082] A first embodiment of the present disclosure provides a refrigerant leakage control method for an air conditioner, which is applicable to the air conditioner of any of the above embodiments. The refrigerant leakage control method for the air conditioner includes:

[0083] Obtain the refrigerant leakage concentration of the indoor unit;

[0084] Controlling the activation of an alarm state when the refrigerant leakage concentration of the indoor unit is greater than or equal to a preset leakage protection threshold; and

[0085] According to the refrigerant leakage concentration of the indoor unit being less than the preset leakage protection threshold, the universal conversion board of the indoor unit is controlled to keep outputting the compressor standby or running signal to the outdoor unit through the first communication port, so that the compressor maintains the current operating state.

[0086] Please refer to Figure 10. The second aspect embodiment of the present disclosure provides a control device 200 for an air conditioner 100, including: a memory 220 and a processor 210. The memory 220 is configured to store a computer program. When the computer program is executed by the processor 210, the steps of the refrigerant leakage control method of the air conditioner 100 as in any embodiment of the first aspect are implemented.

[0087] Please refer to Figures 5 and 9. The third embodiment of the present disclosure provides an air conditioner 100, including an indoor unit 110, an outdoor unit 130, a wired controller 120, an indoor unit universal conversion board 140, a refrigerant sensor 150, an alarm 160 and the control device 200 described in any embodiment of the second aspect.

[0088] Among them, the outdoor unit 130 is provided with an outdoor fan and a compressor, and the indoor unit 110 is provided with an indoor fan 111; the indoor unit universal conversion board 140 is respectively communicated with the indoor unit 110 and the wire controller 120, and the indoor unit universal conversion board 140 is provided with a first communication port 15 electrically connected to the compressor; the refrigerant sensor 150 and the alarm 160 are arranged in the indoor unit 110; the control device 200 is electrically connected to the wire controller 120, the indoor unit universal conversion board 140, the outdoor fan, the compressor, the indoor fan 111 and the refrigerant sensor 150, and is used to implement the refrigerant leakage control method of the air conditioner 100 as any embodiment of the first aspect when executing a computer program.

[0089] In this embodiment, the wired controller 120 and the outdoor unit 130 are also provided with a first communication port 15. The first communication port 15 of the wired controller 120 is communicatively connected to the first communication port 15 on the indoor unit universal conversion board 140, and the first communication port 15 on the indoor unit universal conversion board 140 is communicatively connected to the first communication port 15 on the outdoor unit 130, thereby eliminating the signal line between the wired controller 120 and the outdoor unit 130.

[0090] It can be understood that the first communication port 15 is a compressor start / stop signal port.

[0091] In some embodiments, the indoor unit universal conversion board 140 further includes a refrigerant sensor signal port 17, which is electrically connected to the refrigerant sensor 150. The indoor unit 110, the indoor unit universal conversion board 140, the wired controller 120, and the outdoor unit 130 all include an indoor fan start signal port 13, which are communicatively connected to each other.

[0092] Because the protection program of the refrigerant sensor 150 is not triggered, the signal sent by the wired controller 120 is relayed by the indoor unit universal conversion board 140 and sent to the control board of the indoor unit 110. The indoor unit universal conversion board 140 then sends the compressor operation signal sent by the wired controller 120 to the outdoor unit 130. At this time, both the indoor unit 110 and the outdoor unit 130 can operate normally. Based on the refrigerant sensor 150 detecting that the refrigerant leakage concentration has reached the refrigerant leakage protection threshold, the alarm 160 is activated, the indoor fan 111 is forced to operate at a preset wind speed, and a compressor shutdown signal is output to the outdoor unit 130, causing the compressor to stop operating. Thus, when the refrigerant leakage concentration reaches the refrigerant leakage protection threshold, the compressor of the outdoor unit 130 can automatically shut down for protection.

[0093] 6 , according to some embodiments of the present disclosure, the wired controller 120 , the indoor unit universal conversion board 140 , the indoor unit 110 and the outdoor unit 130 are all provided with a common port 12 , the common port 12 on the wired controller 120 is communicatively connected to the common port 12 on the indoor unit universal conversion board 140 , and the common port 12 on the indoor unit universal conversion board 140 is communicatively connected to the common port 12 on the outdoor unit 130 .

[0094] According to some embodiments of the present disclosure, the wired controller 120, the indoor unit universal conversion board 140, the indoor unit 110 and the outdoor unit 130 are all provided with a defrost signal port 16, and the defrost signal ports 16 on the wired controller 120 and the outdoor unit 130 are communicatively connected with the defrost signal port 16 on the indoor unit universal conversion board 140.

[0095] According to some embodiments of the present disclosure, the wired controller 120, the indoor unit universal conversion board 140, the indoor unit 110 and the outdoor unit 130 are all provided with a four-way valve reversing signal port 14, and the common port 12 on the wired controller 120 and the outdoor unit 130 is communicatively connected with the four-way valve reversing signal port 14 on the indoor unit universal conversion board 140.

[0096] According to some embodiments of the present disclosure, the indoor unit 110 , the indoor unit universal conversion board 140 and the wired controller 120 are all provided with a power supply signal port 11 , and the power supply signal ports 11 are communicatively connected with each other.

[0097] In this embodiment, for ease of explanation, the defrost signal port 16 is W, the four-way valve reversing signal port 14 is B, the power supply signal port 11 is R, the internal fan 111 start signal is G, the common port 12 is C, and the first communication port 15 is Y.

[0098] The indoor unit universal conversion board 140 further adds W, B, and C ports, which are then connected to the outdoor unit 130's W, Y, B, and C ports via signal lines. The W, Y, B, and C signal lines between the wired controller 120 and the outdoor unit 130 are eliminated. The outdoor unit 130's Y and B signals are now provided by the indoor unit universal conversion board 140, with C serving as a common terminal. In defrost mode, the outdoor unit 130's W signal is transmitted to the indoor unit universal conversion board 140, which then transmits it to the indoor unit 110. Because the refrigerant leak protection function is not triggered, the Y, G, and B signals sent by the wired controller 120 to the indoor unit via the indoor unit universal conversion board 140 remain in their current state (either continuously transmitted or disconnected). The indoor fan 111 also remains in its current state (operating or stopped). The Y and B signals sent by the indoor unit universal conversion board 140 to the outdoor unit 130 also remain in their current state (either continuously transmitted or disconnected). Because the refrigerant leakage protection program will be in a triggered state, no matter whether the wired controller 120 sends Y, G, B signals to the indoor unit 110 through the indoor unit universal conversion board 140, the indoor fan 111 is forced to run according to the wind speed set by the protection program, and the indoor unit universal conversion board 140 controls the indoor fan 111 to run according to the wind speed set by the protection program, and the indoor unit universal conversion board 140 forcibly outputs a compressor stop signal to the outdoor unit 130, and the compressor is forced to stop.

[0099] In some embodiments, referring to FIG7 , the wired controller 120 , the indoor unit universal conversion board 140 and the outdoor unit 130 are all provided with a first operating frequency signal port 151 and a second operating frequency signal port 152 . The wired controller 120 is communicatively connected to the first operating frequency signal port 151 on the indoor unit universal conversion board 140 , the indoor unit universal conversion board 140 is communicatively connected to the first operating frequency signal port 151 on the outdoor unit 130 , the wired controller 120 is communicatively connected to the second operating frequency signal port 152 on the indoor unit universal conversion board 140 , and the indoor unit universal conversion board 140 is communicatively connected to the second operating frequency signal port 152 on the outdoor unit 130 .

[0100] In this embodiment, the compressor is a two-stage compressor. A two-stage compressor can be composed of two compressors or a single compressor with two stages, with one or two cylinders acting as high-pressure cylinders and the remaining cylinders acting as low-pressure cylinders. In other words, the air conditioner 100 has a two-stage compressor refrigeration cycle, in which the refrigerant from the evaporator is compressed twice by the low-pressure and high-pressure compressors before entering the condenser. An intercooler is provided between the two compression cycles.

[0101] For ease of description, the first operating frequency signal port 151 and the second operating frequency signal port 152 are denoted as Y1 and Y2 respectively.

[0102] For example, Y1 is used to output a low-frequency operation signal for the compressor, and Y2 is used to output a high-frequency operation signal for the compressor. That is, in response to the outdoor unit 130 receiving the Y1 signal, the compressor operates at a low frequency, and in response to the outdoor unit 130 receiving the Y1 and Y2 signals, the compressor operates at a high frequency.

[0103] Because the refrigerant leakage protection program is not triggered, the Y1, Y2, G, and B signals sent by the wired controller 120 to the indoor unit 110 through the indoor unit universal conversion board 140 remain in the current state (continuously sent or disconnected), the indoor fan 111 remains in the current state (running or stopped), and the Y1, Y2, and B signals sent by the indoor unit universal conversion board 140 to the outdoor unit 130 also remain in the current state (continuously sent or disconnected). Because the refrigerant leakage protection program is in the triggered state, regardless of whether the wired controller 120 sends the Y1, Y2, G, and B signals to the indoor unit 110 through the indoor unit universal conversion board 140, the indoor fan 111 is forced to run at the wind speed set by the protection program, and the indoor unit universal conversion board 140 outputs a compressor stop signal to the outdoor unit 130 through the first communication port 15, or outputs a disconnection Y1+Y2 signal, and the compressor is forced to stop.

[0104] Referring to Figure 8, according to some embodiments of the present disclosure, only the first operating frequency signal port 151 and the second operating frequency signal port 152 are provided on the universal conversion board 140 of the indoor unit, and the first operating frequency signal port 151 and the second operating frequency signal port 152 on the outdoor unit 130 are correspondingly communicated with the first operating frequency signal port 151 and the second operating frequency signal port 152 on the universal conversion board 140 of the indoor unit, and remain disconnected from the first operating frequency signal port 151 and the second operating frequency signal port 152 on the wired controller 120.

[0105] Because the refrigerant leakage protection program is not triggered, the indoor fan 111 maintains its current state (running or shutting down), the Y1, Y2, G, and B signals sent by the wired controller 120 to the indoor unit 110 via the indoor unit universal conversion board 140 remain in their current state (continuously sent or disconnected), the indoor motor maintains its current state (running or shutting down), and the Y1 and Y2 signals sent by the indoor unit universal conversion board 140 to the outdoor unit 130 also remain in their current state (continuously sent or disconnected). Because the refrigerant leakage protection program is in the triggered state, regardless of whether the wired controller 120 sends the Y1, Y2, G, and B signals to the indoor unit 110 via the indoor unit universal conversion board 140, the indoor fan 111 is forced to run according to the wind speed set by the protection program, and the indoor unit universal conversion board 140 outputs a compressor shutdown signal to the outdoor unit 130 via the first communication port 15, or outputs and disconnects the Y1+Y2 signals, forcing the compressor to shut down.

[0106] The fourth embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by the processor 210, a refrigerant leakage control method for the air conditioner 100 as in any embodiment of the first aspect is implemented.

[0107] A fifth aspect of the present disclosure provides a computer program product, including a computer program, which, when executed by a processor, implements a refrigerant leakage control method for an air conditioner according to any one of the first aspects.

[0108] An embodiment of a sixth aspect of the present disclosure provides a computer program, including computer program code. When the computer program code runs on a computer, the computer executes the refrigerant leakage control method for an air conditioner according to any embodiment of the first aspect.

[0109] It should be noted that the explanations of the refrigerant leakage control method and device for the air conditioner in the aforementioned embodiments are also applicable to the computer-readable storage medium, computer program product and computer program in the embodiments of the present disclosure, and will not be repeated here.

[0110] All embodiments of the present disclosure may be implemented individually or in combination with other embodiments, and are all considered to be within the scope of protection claimed by the present disclosure.

[0111] The above description is merely a preferred embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A refrigerant leakage control method for an air conditioner, the air conditioner comprising an indoor unit and an outdoor unit, the outdoor unit being provided with an outdoor fan and a compressor, the indoor unit being provided with an indoor fan, wherein the air conditioner further comprises a wire controller and an indoor unit universal conversion board communicatively connected to the wire controller, the indoor unit universal conversion board being communicatively connected to the indoor unit, and the indoor unit universal conversion board being provided with a first communication port communicatively connected to the outdoor unit, the refrigerant leakage control method for the air conditioner comprising: Obtaining the refrigerant leakage concentration of the indoor unit; and According to the refrigerant leakage concentration of the indoor unit being greater than or equal to a preset leakage protection threshold, the indoor fan is controlled to operate at a preset wind speed, and the indoor unit universal conversion board is controlled to output a compressor shutdown signal to the outdoor unit through the first communication port to shut down the compressor.

2. The refrigerant leakage control method for an air conditioner according to claim 1, wherein the refrigerant leakage control method for an air conditioner further comprises: According to the refrigerant leakage concentration of the indoor unit being less than the preset leakage protection threshold, the indoor unit universal conversion board is controlled to output a compressor standby or running signal to the outdoor unit through the first communication port, so that the compressor maintains the current operating state.

3. The refrigerant leakage control method for an air conditioner according to claim 1 or 2, wherein after the step of obtaining the refrigerant leakage concentration of the indoor unit, the refrigerant leakage control method for an air conditioner further comprises: According to the refrigerant leakage concentration of the indoor unit being greater than or equal to a preset alarm threshold, controlling to turn on the alarm state; Wherein, the preset alarm threshold is smaller than the preset leakage protection threshold.

4. The refrigerant leakage control method for an air conditioner according to any one of claims 1 to 3, wherein in the step of controlling the indoor fan to operate at a preset wind speed, the preset wind speed is the highest wind speed of the indoor fan.

5. The refrigerant leakage control method for an air conditioner according to any one of claims 1 to 4, wherein the refrigerant leakage control method for an air conditioner further comprises: The external fan is controlled to operate for a preset time.

6. A control device for an air conditioner, comprising: A memory and a processor, wherein the memory is configured to store a computer program, and when the computer program is executed by the processor, the steps of the refrigerant leakage control method for the air conditioner as described in any one of claims 1 to 5 are implemented.

7. An air conditioner, comprising: An indoor unit and an outdoor unit, wherein the outdoor unit is provided with an external fan and a compressor, and the indoor unit is provided with an internal fan; A wire controller and an indoor universal conversion board, wherein the indoor universal conversion board is respectively connected to the indoor unit and the wire controller The internal unit universal conversion board is provided with a first communication port electrically connected to the compressor; A refrigerant sensor is disposed in the indoor unit; and The control device of the air conditioner as claimed in claim 6, wherein the control device is electrically connected to the indoor universal conversion board, the outdoor fan, the compressor, the indoor fan and the refrigerant sensor, and is used to implement the refrigerant leakage control method of the air conditioner as claimed in any one of claims 1 to 5 when executing a computer program.

8. The air conditioner according to claim 7, wherein the indoor universal conversion board is further provided with a refrigerant sensor signal port, and the refrigerant sensor signal port is electrically connected to the refrigerant sensor; And / or, the wire controller, the indoor unit universal conversion board, the indoor unit and the outdoor unit are all provided with a common port, the common port on the wire controller is communicatively connected with the common port on the indoor unit universal conversion board, and the common port on the indoor unit universal conversion board is communicatively connected with the common port on the outdoor unit; And / or, the wire controller, the indoor unit universal conversion board, the indoor unit and the outdoor unit are all provided with a defrost signal port, and the defrost signal ports on the wire controller and the outdoor unit are communicatively connected with the defrost signal port on the indoor unit universal conversion board; And / or, the wire controller, the indoor unit universal conversion board, the indoor unit and the outdoor unit are all provided with a four-way valve reversing signal port, and the common port on the wire controller and the outdoor unit is communicatively connected with the four-way valve reversing signal port on the indoor unit universal conversion board; And / or, the indoor unit, the indoor unit universal conversion board and the wire controller are all provided with power supply signal ports, and the power supply signal ports are communicatively connected with each other; And / or, the wired controller is also provided with the first communication port, and the first communication port of the wired controller is communicatively connected with the first communication port on the universal conversion board of the internal unit.

9. The air conditioner according to claim 7 or 8, wherein The wire controller, the indoor universal conversion board and the outdoor unit are all provided with a first operating frequency signal port and a second operating frequency signal port, the first operating frequency signal ports are communicatively connected to each other, and the second operating frequency signal ports are communicatively connected to each other.

10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor, the refrigerant leakage control method of the air conditioner according to any one of claims 1 to 5 is implemented.

11. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the refrigerant leakage control method for an air conditioner according to any one of claims 1 to 5 is implemented.

12. A computer program, comprising computer program codes, which, when executed on a computer, enable the computer to execute the refrigerant leakage control method for an air conditioner according to any one of claims 1 to 5.

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