Refrigerant discharging method and device, air conditioning system and storage medium

Abstract

The invention provides a refrigerant discharging method and device, an air conditioning system and a storage medium, and relates to the technical field of air conditioners, the method comprises the steps that in the operation process of the air conditioning system, the detection concentration of a refrigerant detection sensor is obtained based on the preset detection frequency; and when the detected concentration is larger than or equal to the preset concentration threshold value and the air conditioner system is in the refrigeration mode, refrigerant discharging is conducted based on a refrigerant discharging valve and an outdoor fan, and the frequency of a compressor is controlled to be at a preset frequency value. Outdoor discharge of the refrigerant is achieved through the refrigerant discharge valve, the risk that the combustible refrigerant explodes can be effectively reduced, and potential safety hazards are reduced.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a refrigerant discharge method, apparatus, air conditioning system and storage medium. Background Technology

[0002] Refrigerant is a substance used in air conditioning systems to transfer heat through evaporation and condensation. In refrigeration and air conditioning systems, refrigerant is used to transfer heat energy and produce a cooling effect. With the development of air conditioning technology, ensuring the environmental friendliness and safety of refrigerants has become a goal for more and more technology researchers.

[0003] Taking the refrigeration process of an air conditioning system as an example, when high-pressure liquid refrigerant enters the indoor heat exchanger, it absorbs heat and releases cold, becoming a low-pressure gas. These gases are usually toxic or flammable. Therefore, if a refrigerant leak is detected, measures should be taken immediately to avoid further harm. In current technology, flammable refrigerant is typically discharged from the indoor side, which carries a high risk of explosion and poses a safety hazard. Summary of the Invention

[0004] This application provides a refrigerant emission method, apparatus, air conditioning system, and storage medium to address the problem that the refrigerant emitted in the prior art poses a high risk of explosion and safety hazards.

[0005] According to one aspect of this application, a refrigerant discharge method is provided for use in an air conditioning system, wherein the air conditioning system is configured with a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, an indoor heat exchanger, and a refrigerant discharge valve; the compressor, outdoor heat exchanger, throttling device, and indoor heat exchanger are connected in series and form a pipeline loop based on the connecting pipe of the four-way valve; the refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, and the end of the refrigerant discharge valve is located at the air inlet of the outdoor fan; a refrigerant detection sensor is configured on the indoor heat exchanger;

[0006] The method includes:

[0007] During the operation of the air conditioning system, the refrigerant concentration detected by the sensor is obtained based on a preset detection frequency;

[0008] When the detected concentration is greater than or equal to the preset concentration threshold and the air conditioning system is in cooling mode, refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, and the compressor frequency is controlled at the preset frequency value.

[0009] In one possible implementation, after obtaining the detection concentration of the refrigerant detection sensor, the method further includes:

[0010] When the detected concentration is greater than or equal to the preset concentration threshold and the air conditioning system is in heating mode, the compressor's operating frequency is obtained.

[0011] If the operating frequency is greater than the preset frequency threshold, the compressor frequency will be reduced.

[0012] In one possible implementation, after obtaining the compressor's operating frequency, the process further includes:

[0013] When the operating frequency is less than or equal to the preset frequency threshold, the four-way valve is controlled to switch the air conditioning system to cooling mode.

[0014] Refrigerant is discharged using a refrigerant discharge valve and an outdoor fan, and the compressor frequency is controlled within a preset value.

[0015] In another possible implementation, the aforementioned indoor heat exchanger is equipped with a pipe temperature sensor; after refrigerant discharge based on the refrigerant discharge valve and the outdoor fan, the following is included:

[0016] Obtain the pipe temperature from the pipe temperature sensor;

[0017] The compressor is turned off when the pipe temperature is less than or equal to the preset temperature threshold.

[0018] In another possible implementation, before obtaining the refrigerant concentration from the detection sensor based on a preset detection frequency during the operation of the air conditioning system, the following steps are included:

[0019] During the power-on startup phase of the air conditioning system, the initial detection concentration of the refrigerant detection sensor is obtained;

[0020] If the initial detected concentration is less than or equal to the preset concentration threshold, the air conditioning system will start successfully.

[0021] In yet another possible implementation, after obtaining the initial detection concentration of the refrigerant detection sensor, the following is also included:

[0022] If the initial detected concentration is greater than the preset concentration threshold, refrigerant will be discharged based on the refrigerant discharge valve and the outdoor fan.

[0023] In yet another possible implementation, the refrigerant discharge based on the refrigerant discharge valve and outdoor fan includes:

[0024] Open the refrigerant discharge valve and increase the fan speed of the outdoor fan.

[0025] In yet another possible implementation, after the refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, the following is included:

[0026] Increase the airflow speed of the indoor fan in the air conditioning system;

[0027] The system displays a leak fault code on the indoor unit's screen and activates the indoor unit's buzzer.

[0028] According to another aspect of this application, a refrigerant discharge device is provided for use in an air conditioning system. The air conditioning system is equipped with a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, an indoor heat exchanger, and a refrigerant discharge valve. The compressor, outdoor heat exchanger, throttling device, and indoor heat exchanger are connected in series and form a pipeline loop based on the connecting pipe of the four-way valve. The refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, and the end of the refrigerant discharge valve is located at the air inlet of the outdoor fan. A refrigerant detection sensor is configured on the indoor heat exchanger.

[0029] The aforementioned device includes:

[0030] The detection module is used to obtain the refrigerant concentration detected by the refrigerant detection sensor based on a preset detection frequency during the operation of the air conditioning system.

[0031] The emission module is used to discharge refrigerant based on the refrigerant discharge valve and the outdoor fan when the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in cooling mode, and to control the compressor frequency at a preset frequency value.

[0032] According to another aspect of this application, an air conditioning system is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method shown in the first aspect of this application.

[0033] According to another aspect of this application, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps of the method shown in the first aspect of this application.

[0034] The beneficial effects of the technical solution provided in this application are:

[0035] The refrigerant discharge method provided in this application uses a refrigerant detection sensor to obtain the refrigerant concentration during the operation of the air conditioning system. When the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in cooling mode, refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, while controlling the compressor frequency at a preset frequency value. The refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, and its end is located at the air inlet of the outdoor fan, ensuring that the discharged refrigerant is promptly drawn out by the outdoor fan, thus guaranteeing efficient refrigerant discharge. This application achieves outdoor refrigerant discharge through the refrigerant discharge valve, unlike related technologies that discharge refrigerant on the indoor side. This application effectively reduces the risk of explosion from flammable refrigerant, significantly reducing safety hazards. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic flowchart illustrating a refrigerant emission method provided in an embodiment of this application;

[0038] Figure 2 A schematic diagram of the process for reducing the frequency of a compressor in a refrigerant discharge method provided in an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the structure of an air conditioning system provided in an embodiment of this application;

[0040] Figure 4 A schematic flowchart illustrating an example of a refrigerant emission method provided in an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of a refrigerant emission device provided in an embodiment of this application.

[0042] Figure label:

[0043] 1-Compressor, 2-Indoor heat exchanger, 3-Refrigerant detection sensor, 4-Pipe temperature sensor, 5-Refrigerant discharge valve, 6-Throttling device, 7-Outdoor heat exchanger, 8-Outdoor fan, 9-Four-way valve. Detailed Implementation

[0044] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0045] The accompanying drawings illustrate various structural schematics according to embodiments of the present disclosure. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0046] In the context of this disclosure, when a layer / element is referred to as being "above" another layer / element, the layer / element may be directly above the other layer / element, or there may be an intermediate layer / element between them. Additionally, if a layer / element is "above" another layer / element in one orientation, then when the orientation is reversed, the layer / element may be "below" the other layer / element.

[0047] First, let me explain the terms used in this application:

[0048] Refrigerant, commonly known as refrigerant fluid, is the working fluid used in refrigeration and air conditioning systems to transfer heat and produce a cooling effect. It transfers heat through a phase change during the refrigeration cycle to achieve the cooling effect. When selecting a refrigerant, factors such as its environmental friendliness, cooling performance, safety, and cost need to be considered. Furthermore, in current technology, when flammable refrigerant leaks at the indoor heat exchanger, the concentration of refrigerant is usually reduced by increasing the airflow at the indoor unit's vents, but the risk of explosion still exists.

[0049] Based on the above-mentioned technical problems, the inventive concept of this application is to realize the outdoor discharge of refrigerant through a refrigerant discharge valve. Unlike the related technologies that discharge refrigerant on the indoor side, this application can effectively reduce the risk of explosion of flammable refrigerant and effectively reduce safety hazards.

[0050] The technical solutions of this application and how they solve the aforementioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0051] This application provides a refrigerant discharge method applicable to an air conditioning system. The air conditioning system includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, an indoor heat exchanger, and a refrigerant discharge valve. The compressor, outdoor heat exchanger, throttling device, and indoor heat exchanger are connected in series and form a pipe loop based on the connecting pipe of the four-way valve. The refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, with its end located at the air inlet of the outdoor fan. A refrigerant detection sensor is mounted on the indoor heat exchanger. Figure 1 As shown, the method includes:

[0052] S101, during the operation of the air conditioning system, the detection concentration of the refrigerant detection sensor is obtained based on a preset detection frequency.

[0053] The concentration mentioned above refers to the concentration of refrigerant leaked near the indoor heat exchanger.

[0054] Specifically, during the operation of the air conditioning system, the system can obtain the refrigerant concentration from the refrigerant detection sensor based on a certain detection frequency, such as once every 5 minutes.

[0055] S102, when the detected concentration is greater than or equal to the preset concentration threshold and the air conditioning system is in cooling mode, refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, and the compressor frequency is controlled at the preset frequency value.

[0056] In some implementations, when the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in cooling mode, the air conditioning system can open the refrigerant discharge valve and turn the outdoor fan to maximum so that the refrigerant leaking from the indoor side can be discharged through the refrigerant discharge valve and drawn to the outside by the outdoor fan; at the same time, since the higher the compressor compression frequency, the higher the refrigerant gas pressure entering the indoor heat exchanger, the compressor frequency can be controlled at a preset frequency value to reduce the refrigerant leakage rate on the indoor side.

[0057] In other implementations, when the detected concentration is less than a preset concentration threshold and the air conditioning system is in cooling mode, the air conditioning system is kept running normally.

[0058] This application embodiment uses a refrigerant detection sensor to obtain the refrigerant concentration during the operation of the air conditioning system. When the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in cooling mode, refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, while controlling the compressor frequency at a preset frequency value. The refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, and its end is located at the air inlet of the outdoor fan, ensuring that the discharged refrigerant is promptly drawn out by the outdoor fan, thus guaranteeing efficient refrigerant discharge. This application achieves outdoor refrigerant discharge through the refrigerant discharge valve, unlike related technologies that discharge refrigerant indoors. This application effectively reduces the risk of explosion from flammable refrigerant, significantly reducing safety hazards.

[0059] In some implementations, such as Figure 2 As shown, after obtaining the detection concentration of the refrigerant detection sensor, the method further includes: S201, when the detection concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in heating mode, the operating frequency of the compressor is obtained.

[0060] In other implementations, when the detected concentration is less than a preset concentration threshold and the air conditioning system is in heating mode, the air conditioning is kept running normally.

[0061] S202: When the operating frequency is greater than the preset frequency threshold, the compressor frequency is reduced.

[0062] In this embodiment of the application, since the refrigerant in the indoor heat exchanger is under high pressure when the air conditioning system is in heating mode, it will cause the refrigerant to leak faster. Therefore, the refrigerant leakage rate can be slowed down by reducing the frequency of the compressor.

[0063] In this embodiment, the refrigerant concentration leaking from the indoor heat exchanger is obtained by a refrigerant detection sensor, i.e., the detection concentration. When the detection concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in heating mode, the operating frequency of the compressor is obtained. When the operating frequency is greater than the preset frequency threshold, the compressor frequency is reduced to the preset frequency threshold to reduce the pressure of the refrigerant in the indoor heat exchanger, slow down the refrigerant leakage rate, and further reduce the risk of explosion of the leaked refrigerant on the indoor side.

[0064] This application provides a possible implementation method, which, after obtaining the compressor's operating frequency, further includes:

[0065] S301: When the operating frequency is less than or equal to the preset frequency threshold, the four-way valve is controlled to switch the air conditioning system to cooling mode.

[0066] S302 discharges refrigerant based on the refrigerant discharge valve and outdoor fan, and controls the compressor frequency to a preset value.

[0067] In this embodiment, since the refrigerant in the indoor heat exchanger is under high pressure when the air conditioner is in heating mode, it will further accelerate the leakage of refrigerant on the indoor side. Therefore, after obtaining the compressor's operating frequency, when the operating frequency is less than or equal to a preset frequency threshold, the four-way valve can be controlled to switch the air conditioning system from heating mode to cooling mode. At the same time, the refrigerant discharge valve is opened and the outdoor fan is turned on to the maximum, so that the refrigerant leaking on the indoor side is discharged from the refrigerant discharge valve and sucked out by the outdoor fan. Then, the air conditioning system controls the compressor frequency at the preset frequency value, effectively reducing the concentration of leaked refrigerant and accelerating the discharge speed, thereby improving the user experience.

[0068] This application provides a possible implementation method in which the above-mentioned indoor heat exchanger is equipped with a pipe temperature sensor.

[0069] After the refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, the following steps are included:

[0070] Obtain the pipe temperature from the pipe temperature sensor; when the pipe temperature is less than or equal to a preset temperature threshold, shut down the compressor.

[0071] The preset temperature threshold is the saturation temperature of the refrigerant at 0.15 MPa (i.e., one atmosphere). When the pipe temperature of the indoor heat exchanger is less than or equal to the preset temperature threshold, the air pressure inside the compressor will be less than 0.15 MPa. At this time, the compressor is prone to sucking in air and will be scrapped.

[0072] In some implementations, while shutting down the compressor, the air conditioning system can also keep the outdoor fan running, increase the airflow speed at the indoor unit's air vents, and activate the fresh air system to accelerate the diffusion and discharge of refrigerant on the indoor side.

[0073] In this embodiment of the application, after the refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, the air conditioning system can also obtain the pipe temperature of the pipe temperature sensor. When the pipe temperature is less than or equal to the preset temperature threshold, it indicates that the air pressure in the compressor is less than one atmosphere. At this time, the compressor can be turned off to prevent the compressor from sucking in air and causing it to be scrapped, thus further ensuring the operational stability of the air conditioning system.

[0074] This application embodiment provides a possible implementation method, which includes, before obtaining the refrigerant detection concentration based on a preset detection frequency during the operation of the air conditioning system, the following steps:

[0075] S401, during the power-on startup phase of the air conditioning system, obtain the initial detection concentration of the refrigerant detection sensor.

[0076] S402, if the initial detected concentration is less than or equal to the preset concentration threshold, the air conditioning system starts successfully.

[0077] This application embodiment can determine the start-up of the air conditioner by detecting the initial concentration during the power-on phase of the air conditioner system. When the initial concentration is less than or equal to a preset concentration threshold, the air conditioner system can be started and run normally, which can effectively ensure that the initial refrigerant on the indoor side does not exceed the standard and ensure the safety of the air conditioner system startup.

[0078] This application embodiment provides a possible implementation method, which, after obtaining the initial detection concentration of the refrigerant detection sensor, further includes:

[0079] If the initial detected concentration is greater than the preset concentration threshold, refrigerant will be discharged based on the refrigerant discharge valve and the outdoor fan.

[0080] In this embodiment of the application, when the initial detected concentration is greater than the preset concentration threshold during the power-on startup phase of the air conditioning system, the air conditioning system can be temporarily shut down, and refrigerant can be discharged based on the refrigerant discharge valve and the outdoor fan. The specific discharge steps will be described in detail below.

[0081] This application provides a possible implementation method for refrigerant discharge based on a refrigerant discharge valve and an outdoor fan, including:

[0082] Open the refrigerant discharge valve and increase the fan speed of the outdoor fan.

[0083] This application provides a possible implementation method, which includes, after the refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, the following:

[0084] Increase the airflow speed of the indoor fan in the air conditioning system;

[0085] The system displays a leak fault code on the indoor unit's screen and activates the indoor unit's buzzer.

[0086] In this embodiment, when refrigerant is discharged through the refrigerant discharge valve and outdoor fan, the airflow speed of the indoor fan in the air conditioning system can be increased to accelerate the diffusion of indoor refrigerant and reduce its concentration. Simultaneously, the fresh air system of the air conditioning system can be activated to further extract indoor refrigerant. On another front, the refrigerant discharge valve can be opened to discharge indoor refrigerant, and the outdoor fan speed can be increased to accelerate outdoor refrigerant discharge, achieving a combined indoor and outdoor refrigerant discharge. At the same time, a leak fault code can be displayed on the indoor unit's screen, and the buzzer of the indoor unit can be activated to remind the user of the refrigerant leak and prompt timely repair, further enhancing the user experience.

[0087] To better understand the above refrigerant emission methods, the following will combine... Figure 3 and Figure 4 A detailed example of a refrigerant emission method according to this application is provided, wherein the refrigerant emission method is applied to an air conditioning system, such as... Figure 3 As shown, the air conditioning system is equipped with a compressor 1, a four-way valve 9, an outdoor heat exchanger 7, a throttling device 6, an indoor heat exchanger 2, and a refrigerant discharge valve 5; the compressor 1, the outdoor heat exchanger 7, the throttling device 6, and the indoor heat exchanger 2 are connected in series and form a pipe loop based on the connecting pipe of the four-way valve 9; the refrigerant discharge valve 5 is connected in parallel between the throttling device 6 and the indoor heat exchanger 2, and the end of the refrigerant discharge valve 5 is located at the air inlet of the outdoor fan 8; a refrigerant detection sensor 3 and a pipe temperature sensor 4 are installed on the indoor heat exchanger;

[0088] The method includes the following steps:

[0089] S501, during the power-on and startup phase of the air conditioner, the initial detection concentration of the refrigerant detection sensor 3 is obtained.

[0090] If the initial detected concentration is less than or equal to the preset concentration threshold, the air conditioning system will start successfully.

[0091] When the initial detected concentration is greater than the preset concentration threshold, refrigerant is discharged based on the refrigerant discharge valve 5 and the outdoor fan 8.

[0092] Specifically, the methods of refrigerant emission include:

[0093] Increase the airflow speed of the indoor fan in the air conditioning system;

[0094] Turn on the fresh air system of the air conditioning system;

[0095] Open the refrigerant discharge valve and increase the fan speed of the outdoor fan;

[0096] The system displays a leak fault code on the indoor unit's screen and activates the indoor unit's buzzer.

[0097] S502, during the operation of the air conditioning system, the detection concentration of refrigerant by the refrigerant detection sensor 3 is obtained based on a preset detection frequency.

[0098] The concentration mentioned above refers to the concentration of refrigerant leaked near the indoor heat exchanger.

[0099] S503, when the detected concentration is greater than or equal to the preset concentration threshold and the air conditioning system is in cooling mode, refrigerant is discharged based on the refrigerant discharge valve 5 and the outdoor fan 8, and the frequency of the compressor 1 is controlled at the preset frequency value.

[0100] If the detected concentration is less than the preset concentration threshold and the air conditioning system is in cooling mode, the air conditioning system will continue to operate normally.

[0101] S504, when the detected concentration is greater than or equal to the preset concentration threshold and the air conditioning system is in heating mode, the operating frequency of compressor 1 is obtained. When the operating frequency is greater than the preset frequency threshold, the frequency of compressor 1 is reduced.

[0102] If the detected concentration is less than the preset concentration threshold and the air conditioning system is in heating mode, the air conditioning will continue to operate normally.

[0103] S505: After obtaining the operating frequency of compressor 1, if the operating frequency is less than or equal to a preset frequency threshold, control the four-way valve 9 to switch the air conditioning system to cooling mode. Refrigerant is discharged based on the refrigerant discharge valve 5 and the outdoor fan 8, and the frequency of compressor 1 is controlled within the preset frequency value.

[0104] When the operating frequency is greater than the preset frequency threshold, the frequency of compressor 1 is reduced.

[0105] S506: Obtain the pipe temperature from pipe temperature sensor 4; when the pipe temperature is less than or equal to the preset temperature threshold, shut down the compressor.

[0106] The preset temperature threshold is the saturation temperature of the refrigerant at 0.15 MPa (i.e., one atmosphere). When the pipe temperature of the indoor heat exchanger 2 is less than or equal to the preset temperature threshold, the air pressure inside the compressor 1 will be less than 0.15 MPa. At this time, the compressor 1 is prone to sucking in air and will be scrapped.

[0107] In some implementations, while shutting down compressor 1, the air conditioning system can also keep outdoor fan 8 running, increase the airflow speed at indoor unit air vents, and activate the fresh air system to accelerate the diffusion and discharge of refrigerant on the indoor side.

[0108] This application provides a refrigerant discharge device that can be configured in an air conditioning system. The air conditioning system includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, an indoor heat exchanger, and a refrigerant discharge valve. The compressor, outdoor heat exchanger, throttling device, and indoor heat exchanger are connected in series and form a pipe loop based on the connecting pipe of the four-way valve. The refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, with its end located at the air inlet of the outdoor fan. A refrigerant detection sensor is configured on the indoor heat exchanger, such as... Figure 5 As shown, the refrigerant emission device 50 may include: a detection module 501 and an emission module 502;

[0109] Among them, the detection module 501 is used to obtain the detection concentration of the refrigerant detection sensor based on a preset detection frequency during the operation of the air conditioning system;

[0110] The emission module 502 is used to discharge refrigerant based on the refrigerant discharge valve and the outdoor fan when the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in cooling mode, and to control the compressor frequency at a preset frequency value.

[0111] This application embodiment provides a possible implementation method in which, after obtaining the detection concentration of the refrigerant detection sensor, the detection module 501 is further used for:

[0112] When the detected concentration is greater than or equal to the preset concentration threshold and the air conditioning system is in heating mode, the compressor's operating frequency is obtained.

[0113] If the operating frequency is greater than the preset frequency threshold, the compressor frequency will be reduced.

[0114] This application embodiment provides a possible implementation method in which, after obtaining the operating frequency of the compressor, the detection module 501 is further configured to:

[0115] When the operating frequency is less than or equal to the preset frequency threshold, the four-way valve is controlled to switch the air conditioning system to cooling mode.

[0116] Refrigerant is discharged using a refrigerant discharge valve and an outdoor fan, and the compressor frequency is controlled within a preset value.

[0117] This application embodiment provides a possible implementation, wherein the indoor heat exchanger is equipped with a pipe temperature sensor; after the refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, the discharge module 502 is used for:

[0118] Obtain the pipe temperature from the pipe temperature sensor;

[0119] The compressor is turned off when the pipe temperature is less than or equal to the preset temperature threshold.

[0120] This application embodiment provides a possible implementation method in which the detection module 501, before acquiring the refrigerant concentration from the refrigerant detection sensor based on a preset detection frequency during the operation of the air conditioning system, is used for:

[0121] During the power-on startup phase of the air conditioning system, the initial detection concentration of the refrigerant detection sensor is obtained;

[0122] If the initial detected concentration is less than or equal to the preset concentration threshold, the air conditioning system will start successfully.

[0123] This application embodiment provides a possible implementation method in which, after obtaining the initial detection concentration of the refrigerant detection sensor, the detection module 501 is further used for:

[0124] If the initial detected concentration is greater than the preset concentration threshold, refrigerant will be discharged based on the refrigerant discharge valve and the outdoor fan.

[0125] This application embodiment provides a possible implementation method in which the above-mentioned discharge module 502, when discharging refrigerant based on the refrigerant discharge valve and the outdoor fan, is used for:

[0126] Open the refrigerant discharge valve and increase the fan speed of the outdoor fan.

[0127] This application embodiment provides a possible implementation method in which the above-mentioned discharge module 502, after discharging refrigerant based on the refrigerant discharge valve and the outdoor fan, is used for:

[0128] Increase the airflow speed of the indoor fan in the air conditioning system;

[0129] The system displays a leak fault code on the indoor unit's screen and activates the indoor unit's buzzer.

[0130] The apparatus in this application embodiment can execute the method provided in this application embodiment, and the implementation principle is similar. The actions performed by each module in the apparatus of each embodiment of this application correspond to the steps in the method of each embodiment of this application. For detailed functional descriptions of each module of the apparatus, please refer to the descriptions in the corresponding methods shown above, which will not be repeated here.

[0131] This application embodiment uses a refrigerant detection sensor to obtain the refrigerant concentration during the operation of the air conditioning system. When the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in cooling mode, refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, while controlling the compressor frequency at a preset frequency value. The refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, and its end is located at the air inlet of the outdoor fan, ensuring that the discharged refrigerant is promptly drawn out by the outdoor fan, thus guaranteeing efficient refrigerant discharge. This application achieves outdoor refrigerant discharge through the refrigerant discharge valve, unlike related technologies that discharge refrigerant indoors. This application effectively reduces the risk of explosion from flammable refrigerant, significantly reducing safety hazards.

[0132] This application provides an air conditioning system, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method shown in the first aspect of this application.

[0133] This application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the method shown in the first aspect of this application.

[0134] The above description does not provide detailed technical specifications regarding the structure of each layer. However, those skilled in the art should understand that layers and regions of desired shapes can be formed using various technical means. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Additionally, although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be advantageously combined.

[0135] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0136] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A refrigerant discharge method, applied to an air conditioning system, characterized in that, The air conditioning system is equipped with a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, an indoor heat exchanger, and a refrigerant discharge valve; the compressor, the outdoor heat exchanger, the throttling device, and the indoor heat exchanger are connected in series and form a pipeline loop based on the connecting pipe of the four-way valve; the refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, and the end of the refrigerant discharge valve is located at the air inlet of the outdoor fan; a refrigerant detection sensor is installed on the indoor heat exchanger; The method includes: During the operation of the air conditioning system, the detection concentration of the refrigerant by the refrigerant detection sensor is obtained based on a preset detection frequency; When the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in cooling mode, refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, and the frequency of the compressor is controlled at a preset frequency value.

2. The method according to claim 1, characterized in that, After obtaining the detection concentration of the refrigerant detection sensor, the method further includes: When the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in heating mode, the operating frequency of the compressor is obtained. If the operating frequency is greater than a preset frequency threshold, the compressor frequency is reduced.

3. The method according to claim 2, characterized in that, After obtaining the operating frequency of the compressor, the method further includes: When the operating frequency is less than or equal to the preset frequency threshold, the four-way valve is controlled to switch the air conditioning system to cooling mode; Refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan, and the frequency of the compressor is controlled at a preset frequency value.

4. The method according to claim 1, characterized in that, The indoor heat exchanger is equipped with a pipe temperature sensor; the process of discharging refrigerant based on the refrigerant discharge valve and the outdoor fan includes: Obtain the pipe temperature from the pipe temperature sensor; When the pipe temperature is less than or equal to a preset temperature threshold, the compressor is turned off.

5. The method according to claim 1, characterized in that, Before obtaining the refrigerant concentration from the refrigerant detection sensor based on a preset detection frequency during the operation of the air conditioning system, the process includes: During the power-on startup phase of the air conditioning system, the initial detection concentration of the refrigerant detection sensor is obtained; The air conditioning system starts successfully when the initial detected concentration is less than or equal to the preset concentration threshold.

6. The method according to claim 5, characterized in that, After obtaining the initial detection concentration of the refrigerant detection sensor, the method further includes: When the initial detected concentration is greater than the preset concentration threshold, refrigerant is discharged based on the refrigerant discharge valve and the outdoor fan.

7. The method according to any one of claims 1-6, characterized in that, The refrigerant discharge based on the refrigerant discharge valve and the outdoor fan includes: Open the refrigerant discharge valve and increase the fan speed of the outdoor fan.

8. The method according to any one of claims 1-6, characterized in that, After refrigerant discharge based on the refrigerant discharge valve and the outdoor fan, the process includes: Increase the airflow speed of the indoor fan in the air conditioning system; The indoor unit of the air conditioning system displays a leakage fault code on its screen and activates the buzzer of the indoor unit.

9. A refrigerant discharge device, applied to an air conditioning system, characterized in that, The air conditioning system is equipped with a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, an indoor heat exchanger, and a refrigerant discharge valve; the compressor, the outdoor heat exchanger, the throttling device, and the indoor heat exchanger are connected in series and form a pipeline loop based on the connecting pipe of the four-way valve; the refrigerant discharge valve is connected in parallel between the throttling device and the indoor heat exchanger, and the end of the refrigerant discharge valve is located at the air inlet of the outdoor fan; a refrigerant detection sensor is installed on the indoor heat exchanger; The refrigerant discharge device includes: The detection module is used to obtain the detection concentration of the refrigerant detection sensor based on a preset detection frequency during the operation of the air conditioning system. The emission module is used to discharge refrigerant based on the refrigerant discharge valve and the outdoor fan when the detected concentration is greater than or equal to a preset concentration threshold and the air conditioning system is in cooling mode, and to control the frequency of the compressor to a preset frequency value.

10. An air conditioning system, characterized in that, The method is characterized by comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method according to any one of claims 1-8.

11. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, it implements the steps of the method according to any one of claims 1-8.

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