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

Abstract

The invention relates to the technical field of air conditioners, and provides a refrigerant leakage control method and device, an air conditioner and a computer readable storage medium. The refrigerant leakage control method is used for the air conditioner, the air conditioner comprises an indoor unit and an outdoor unit, the air conditioner further comprises a wire controller and an indoor unit general conversion plate in communication connection with the wire controller, the indoor unit general conversion plate is in communication connection with the indoor unit, and the indoor unit general conversion plate is provided with a first communication port in communication connection with the outdoor unit. The refrigerant leakage control method comprises the steps that the refrigerant leakage concentration of the indoor unit is obtained; and according to the condition that the refrigerant leakage concentration of the indoor unit is larger than or equal to the preset leakage protection threshold value, the inner fan is controlled to operate at the preset air gear, and the indoor unit universal conversion plate is controlled to output a compressor shutdown signal to the outdoor unit through the first communication port, so that the compressor is shut down. According to the technical scheme, when refrigerant leakage occurs in the indoor unit, the outdoor unit can timely correspond to a refrigerant leakage protection program.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Chinese patent application 202310768620.9, entitled “Refrigerent leakage control method, device, air conditioner and computer-readable storage medium”, filed on June 27, 2023. The entire contents of this application are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of air conditioning technology, and in particular to a refrigerant leakage control method, device, air conditioner and computer-readable storage medium. 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 it is necessary to install a refrigerant sensor for refrigerant leakage detection. When the refrigerant leakage value is detected to exceed the refrigerant leakage protection threshold, the indoor and outdoor units need to respond in a timely manner according to the established protection procedures.

[0006] In the related art, American-style ducted air conditioners in North America usually have indoor and outdoor units that do not communicate with each other, resulting in the outdoor unit being unable to respond to the protection program when a refrigerant leaks from the indoor unit. In addition, the North American market is mostly a replacement market, and users do not replace indoor and outdoor units together, but only replace a single indoor unit or outdoor unit. However, when users need to replace a new product, the existing control method cannot achieve the refrigerant leakage protection function, and users have to replace both the indoor and outdoor units at the same time, resulting in a high replacement cost. Summary of the invention

[0007] The purpose of the present invention is to provide a refrigerant leakage control method, device, air conditioner and computer readable storage medium, which are used to at least solve the technical problem that the indoor unit and outdoor unit of the American duct air conditioner for the North American market do not communicate with each other, resulting in the outdoor unit being unable to respond to the protection program when the indoor unit leaks refrigerant. This purpose is achieved through the following technical solutions:

[0008] A first aspect of the present invention 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, the indoor unit universal conversion board being 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 comprising:

[0009] Obtaining the refrigerant leakage concentration of the indoor unit;

[0010] 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.

[0011] According to the refrigerant leakage control method of the air conditioner provided by the present invention, a wire controller and a universal conversion board for the indoor unit communicatively connected to the wire 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 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 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.

[0012] Specifically, by obtaining the refrigerant leakage concentration of the indoor unit in real time, the refrigerant leakage concentration can be monitored by the refrigerant sensor set in the indoor unit. When the refrigerant leakage concentration is greater than or equal to the preset leakage protection threshold, the indoor unit has a safety risk of ignition or explosion. At this time, the indoor fan is controlled to run at a preset wind speed, so that the refrigerant in the indoor unit is blown indoors to reduce the refrigerant concentration of the indoor unit. At the same time, the universal conversion board of the indoor unit is controlled to output a compressor shutdown signal to the outdoor unit through the first communication port, so that the compressor is forced to stop, so that the compressor cannot continue to provide 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. At the same time, due to the addition of the universal conversion board of the indoor unit, the indoor unit can adapt to different types of outdoor units through the universal conversion board of the indoor unit, so that 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.

[0013] It is understandable that the indoor unit can output a power supply signal to the wire controller, and the wire controller is connected to the universal conversion board of the indoor unit in communication, so that the universal conversion board of the indoor unit can receive and output the compressor stop signal. In addition, the wire controller can also output the indoor fan start signal to the indoor unit through the universal conversion board of the indoor unit.

[0014] In addition, the refrigerant leakage control method of the air conditioner according to the present invention may also have the following additional technical features:

[0015] In some embodiments of the present invention, the refrigerant leakage control method of the air conditioner further includes:

[0016] 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.

[0017] In some embodiments of the present invention, after the step of obtaining the refrigerant leakage concentration of the indoor unit, the method further includes:

[0018] 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;

[0019] Wherein, the preset alarm threshold is smaller than the preset leakage protection threshold.

[0020] In some embodiments of the present invention, 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.

[0021] In some embodiments of the present invention, the refrigerant leakage control method of the air conditioner further includes:

[0022] The external fan is controlled to operate for a preset time.

[0023] In a second aspect, the present invention 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 a refrigerant leakage control method for an air conditioner as described in any one of the implementation methods of the first aspect can be implemented.

[0024] In a third aspect, the present invention provides an air conditioner, comprising:

[0025] 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;

[0026] A wired controller and an indoor universal conversion board, wherein the indoor universal conversion board is respectively connected to the indoor unit and the wired controller for communication, and the indoor universal conversion board is provided with a first communication port electrically connected to the compressor;

[0027] A refrigerant sensor is disposed in the indoor unit; and

[0028] As described in the second aspect of the implementation mode, the control device of the air conditioner is electrically connected to the indoor unit 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 described in any one of the implementation modes of the first aspect when executing a computer program.

[0029] In some embodiments of the present invention, 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;

[0030] 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;

[0031] 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;

[0032] 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;

[0033] 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;

[0034] 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.

[0035] In some embodiments of the present invention, the wire 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 with each other, and the second operating frequency signal ports are communicatively connected with each other.

[0036] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by the processor, a refrigerant leakage control method for an air conditioner as described in any one of the implementation modes of the first aspect is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A schematic diagram of a flow chart of a refrigerant leakage control method for an air conditioner provided according to some embodiments of the present invention is schematically shown;

[0039] Figure 2 A schematic diagram of a flow chart of a refrigerant leakage control method for an air conditioner provided according to some embodiments of the present invention is schematically shown;

[0040] Figure 3 A schematic diagram of a flow chart of a refrigerant leakage control method for an air conditioner provided according to some embodiments of the present invention is schematically shown;

[0041] Figure 4 A schematic diagram of a flow chart of a refrigerant leakage control method for an air conditioner provided according to some embodiments of the present invention is schematically shown;

[0042] Figure 5 A schematic diagram of signal line connection between an indoor unit, a wire controller and an outdoor unit provided according to some embodiments of the present invention is schematically shown;

[0043] Figure 6 A schematic diagram of signal line connection between an indoor unit, a wire controller and an outdoor unit provided according to some embodiments of the present invention is schematically shown;

[0044] Figure 7 A schematic diagram of signal line connection between an indoor unit, a wire controller and an outdoor unit provided according to some embodiments of the present invention is schematically shown;

[0045] Figure 8 A schematic diagram of signal line connection between an indoor unit, a wire controller and an outdoor unit provided according to some embodiments of the present invention is schematically shown;

[0046] Fig. 9 A schematic structural block diagram of an air conditioner provided according to some embodiments of the present invention is schematically shown;

[0047] Fig.10 A schematic structural block diagram of a control device provided according to some embodiments of the present invention is schematically shown.

[0048] The reference numerals are as follows:

[0049] 100. air conditioner; 200. control device;

[0050] 110, indoor unit; 120, wired controller; 130, outdoor unit; 140, universal conversion board for indoor unit; 150, refrigerant sensor; 160, alarm;

[0051] 210, processor; 220, memory;

[0052] 111, internal fan; 151, first operating frequency signal port; 152, second operating frequency signal port;

[0053] 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

[0054] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the 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. On the contrary, these embodiments are provided in order 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.

[0055] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments 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 "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence 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 interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0056] 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, 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.

[0057] For ease of description, spatial 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 figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0058] See also Figure 1 The first aspect of the present invention 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, the indoor unit universal conversion board being 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 comprising:

[0059] Step S10: Obtain the refrigerant leakage concentration of the indoor unit.

[0060] Step S20: Determine whether the refrigerant leakage concentration of the indoor unit is greater than or equal to a preset leakage protection threshold.

[0061] 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 run at a preset wind speed, and the indoor 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.

[0062] In this embodiment, the refrigerant leakage control method of the air conditioner provided by the present invention is provided by adding a wire controller and a universal conversion board for the indoor unit that is communicatively connected to the wire 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 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.

[0063] 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. When the refrigerant leakage concentration is greater than or equal to a preset leakage protection threshold, the indoor fan is controlled to be forced to run at a preset wind speed, so that the refrigerant in the indoor unit is blown indoors to reduce the refrigerant concentration of the indoor unit. At the same time, 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, so that the compressor cannot continue to provide 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.

[0064] At the same time, 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 for the indoor unit, so that 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.

[0065] It is understandable that the indoor unit can output a power supply signal to the wire controller, and the wire controller is connected to the universal conversion board of the indoor unit in communication, so that the universal conversion board of the indoor unit can receive and output the compressor stop signal. In addition, the wire controller can also output the indoor fan start signal to the indoor unit through the universal conversion board of the indoor unit.

[0066] See also Figure 2 According to some embodiments of the present invention, the refrigerant leakage control method of the air conditioner further includes:

[0067] Step S40: 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 operation signal to the outdoor unit through the first communication port, so that the compressor maintains the current operation state.

[0068] In the present embodiment, it can be understood that when 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. 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 at the same time the indoor fan maintains the current wind speed operation.

[0069] See also Figure 3 According to some embodiments of the present invention, after the step of obtaining the refrigerant leakage concentration of the indoor unit, the method further includes:

[0070] Step S50: according to the refrigerant leakage concentration of the indoor unit being greater than or equal to the preset alarm threshold, controlling to turn on the alarm state;

[0071] Among them, the preset alarm threshold is less than the preset leakage protection threshold.

[0072] 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.

[0073] It is worth noting that when the alarm state is turned on, the refrigerant leakage concentration of the indoor unit is lower than the preset leakage alarm threshold, which is used to promptly remind the operator to check and repair the indoor unit. When the refrigerant leakage concentration of the indoor unit reaches the preset leakage protection threshold, the refrigerant leakage protection program is immediately controlled to start. When the refrigerant leakage concentration drops to less than the preset leakage protection threshold again, the alarm device is controlled to turn off the alarm state.

[0074] According to some embodiments of the present invention, 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.

[0075] See also Figure 4 According to some embodiments of the present invention, the refrigerant leakage control method of the air conditioner further includes:

[0076] Step S60: Control the external fan to operate for a preset time.

[0077] In this embodiment, illustratively, the preset duration can be set within the range of 3 minutes to 15 minutes.

[0078] The compressor will generate a lot of heat during operation. When the compressor stops suddenly, the temperature of the outdoor unit is still high. At this time, the outdoor fan is controlled to continue to run 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.

[0079] According to some embodiments of the present application, the present application provides a refrigerant leakage control method for an air conditioner, which is applicable to the air conditioner of any of the above embodiments, wherein the refrigerant leakage control method for the air conditioner includes:

[0080] Obtain the refrigerant leakage concentration of the indoor unit;

[0081] When the refrigerant leakage concentration of the indoor unit is greater than or equal to the preset leakage protection threshold, the control starts the alarm state;

[0082] 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.

[0083] See also Fig.10According to some embodiments of the present application, a second aspect of the present invention provides a control device 200 for an air conditioner 100, comprising: a memory 220 and a processor 210, wherein the memory 220 is configured to store a computer program, and when the computer program is executed by the processor 210, the steps of the refrigerant leakage control method for the air conditioner 100 as described in any one of the first aspect implementation schemes can be implemented.

[0084] See also Figure 5 and Fig. 9 According to some embodiments of the present application, a third aspect of the present invention provides an air conditioner 100, including an indoor unit 110, an outdoor unit 130, a wire controller 120, an indoor unit universal conversion board 140, a refrigerant sensor 150, an alarm 160 and the control device 200 described in the second aspect of the embodiment.

[0085] 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 one of the first aspect implementation methods when executing a computer program.

[0086] 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.

[0087] It can be understood that the first communication port 15 is a compressor start / stop signal port.

[0088] Furthermore, the indoor universal conversion board 140 is also provided with a refrigerant sensor signal port 17, and the refrigerant sensor signal port 17 is electrically connected to the refrigerant sensor 150. The indoor unit 110, the indoor universal conversion board 140, the wire controller 120 and the outdoor unit 130 are all provided with an indoor fan start signal port 13, and the indoor fan start signal ports 13 are communicatively connected with each other.

[0089] When the protection program of the refrigerant sensor 150 is not triggered, the signal sent by the wire controller 120 is transferred by the indoor universal conversion board 140 and sent to the control board of the indoor unit 110. At the same time, the indoor universal conversion board 140 sends the compressor operation signal sent by the wire controller 120 to the outdoor unit 130. At this time, both the indoor unit 110 and the outdoor unit 130 can operate normally. When the refrigerant sensor 150 detects that the refrigerant leakage concentration reaches the refrigerant leakage protection threshold, the control alarm 160 starts the alarm, and controls the indoor fan 111 to run at the preset wind speed forcibly, and outputs the compressor stop signal to the outdoor unit 130, so that the compressor stops running, so that when the refrigerant leakage concentration reaches the refrigerant leakage protection threshold, the compressor of the outdoor unit 130 can automatically stop for protection.

[0090] See also Figure 6 According to some embodiments of the present invention, the wire 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 wire controller 120 is communicatively connected with 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 with the common port 12 on the outdoor unit 130.

[0091] According to some embodiments of the present invention, 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.

[0092] According to some embodiments of the present invention, 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.

[0093] According to some embodiments of the present invention, the indoor unit 110 , the indoor unit universal conversion board 140 and the wire controller 120 are all provided with power supply signal ports 11 , and the power supply signal ports 11 are communicatively connected with each other.

[0094] 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.

[0095] The indoor universal conversion board 140 further adds W, B, and C ports, and connects the W, Y, B, and C ports of the indoor universal conversion board 140 to the W, Y, B, and C ports of the outdoor unit 130 through signal lines, and cancels the W, Y, B, and C signal lines between the wire controller 120 and the outdoor unit 130. At this time, the Y and B signals of the outdoor unit 130 are provided by the indoor universal conversion board 140, and C is a common terminal. Under the defrosting mode, the W signal of the outdoor unit 130 is sent to the indoor universal conversion board 140, and then sent to the indoor unit 110 by the indoor universal conversion board 140. When the refrigerant leakage protection program is not triggered, the Y, G, and B signals sent by the wire controller 120 to the indoor unit through the indoor 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 Y and B signals sent by the indoor universal conversion board 140 to the outdoor unit 130 also remain in the current state (continuously sent or disconnected). When the refrigerant leakage protection program is in the triggered state, no matter whether the wire 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. At the same time, the indoor unit universal conversion board 140 forces the output of the compressor stop signal to the outdoor unit 130, and the compressor is forced to stop.

[0096] Further, see Figure 7 The wire 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 wire controller 120 is communicatively connected with 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 with the first operating frequency signal port 151 on the outdoor unit 130, the wire controller 120 is communicatively connected with 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 with the second operating frequency signal port 152 on the outdoor unit 130.

[0097] In this embodiment, the compressor is a two-stage compressor, which can be composed of two compressors or a single two-stage system composed of one compressor, in which one or two cylinders are used as high-pressure cylinders and the remaining cylinders are used as low-pressure cylinders. That is, the air conditioner 100 has a two-stage compressor refrigeration cycle function, which means that the refrigerant from the evaporator must be compressed twice by the low-pressure and high-pressure compressors before entering the condenser. An intercooler is set between the two compressions.

[0098] For the convenience of description, the first operating frequency signal port 151 and the second operating frequency signal port 152 are respectively denoted as Y1 and Y2.

[0099] Exemplarily, Y1 is used to output a compressor low-frequency operation signal, and Y2 is used to output a compressor high-frequency operation signal. That is, when the outdoor unit 130 receives the Y1 signal, the compressor operates at a low frequency, and when the outdoor unit 130 receives the Y1 and Y2 signals, the compressor operates at a high frequency.

[0100] When the refrigerant leakage protection program is not triggered, the Y1, Y2, G, B signals sent by the wire controller 120 to the indoor unit 110 through the indoor unit universal conversion board 140 remain in the current state (continuously sent or disconnected), and the indoor fan 111 remains in the current state (running or stopped), and at the same time, the Y1, Y2, 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). When the refrigerant leakage protection program is in the triggered state, regardless of whether the wire controller 120 sends the Y1, Y2, 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 at the same time, 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 the disconnection Y1+Y2 signal at the same time, and the compressor is forced to stop.

[0101] See also Figure 8 According to some embodiments of the present invention, only the first operating frequency signal port 151 and the second operating frequency signal port 152 are provided on the indoor unit universal conversion board 140, 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 indoor unit universal conversion board 140, and remain disconnected from the first operating frequency signal port 151 and the second operating frequency signal port 152 on the wire controller 120.

[0102] When the refrigerant leakage protection program is not triggered, the indoor fan 111 maintains the current state (running or stopping), the Y1, Y2, G, B signals sent by the wire controller 120 to the indoor unit 110 through the indoor unit universal conversion board 140 maintain the current state (continuously sent or disconnected), the indoor motor maintains the current state (running or stopping), and the Y1 and Y2 signals sent by the indoor unit universal conversion board 140 to the outdoor unit 130 also maintain the current state (continuously sent or disconnected). When the refrigerant leakage protection program is in the triggered state, at this time, regardless of whether the wire controller 120 sends the Y1, Y2, 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 at the same time, the indoor unit universal conversion board 140 outputs the compressor stop signal to the outdoor unit 130 through the first communication port 15, or outputs the disconnection Y1+Y2 signal at the same time, and the compressor is forced to stop.

[0103] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by the processor 210, implements a refrigerant leakage control method for the air conditioner 100 as in any one of the implementation schemes of the first aspect.

[0104] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope 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, characterized in that: The air conditioner further comprises a wire controller and an indoor universal conversion board communicatively connected to the wire controller, the indoor universal conversion board is communicatively connected to the indoor unit, and the indoor universal conversion board is provided with a first communication port communicatively connected to the outdoor unit, and the refrigerant leakage control method of the air conditioner comprises: Obtaining the refrigerant leakage concentration of the indoor unit; 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 of the air conditioner according to claim 1, characterized in that: The refrigerant leakage control method of the air conditioner also includes: 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, characterized in that: After the step of obtaining the refrigerant leakage concentration of the indoor unit, the method further includes: 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 claim 1 or 2, characterized in that: 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.

5. The refrigerant leakage control method of an air conditioner according to claim 1 or 2, characterized in that: The refrigerant leakage control method of the air conditioner also includes: The external fan is controlled to operate for a preset time.

6. A control device for an air conditioner, characterized in that: include: 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 can be implemented.

7. An air conditioner, characterized in that: include: 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 wired controller and an indoor universal conversion board, wherein the indoor universal conversion board is respectively connected to the indoor unit and the wired controller for communication, and the indoor 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, characterized in that: The indoor universal conversion board is also 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, characterized in that: 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, characterized in that: The computer-readable storage medium stores a computer program, 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.

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