Air conditioning system control method, program product, medium, device, and air conditioning system

Abstract

The application discloses an air conditioning system control method, a program product, a medium, an air conditioning system and an air conditioning system, the air conditioning system comprises an electronic valve, the electronic valve is connected with a first refrigerant pipeline and a second refrigerant pipeline, the first refrigerant pipeline is a refrigerant pipeline connected with a four-way valve and an indoor unit, and the second refrigerant pipeline is a refrigerant pipeline connected with the four-way valve and an outdoor unit, and the method comprises the following steps: before the air conditioning system performs a defrosting action, the electronic valve is controlled to be switched from a closed state to an open state; after the electronic valve is kept in the open state for a set time length, the electronic valve is controlled to be switched from the open state to the closed state. Through the technical scheme, the stability of the defrosting process of the air conditioning system can be improved.

Description

Technical Field

[0001] This application belongs to the field of air conditioning system control technology, and in particular relates to an air conditioning system control method, program product, medium, device and air conditioning system. Background Technology

[0002] Currently, after running in heating mode for a period of time, air conditioning systems need to perform a defrosting process to remove frost that has formed on the outdoor unit's heat exchanger, preventing a decrease in heating efficiency. However, this defrosting process typically generates significant noise and disturbance, severely impacting the user experience. Existing technologies lack effective solutions for the noise generated during defrosting. Therefore, reducing the noise and disturbance generated during defrosting to improve the smoothness of the defrosting process has become an urgent problem to be solved. Summary of the Invention

[0003] The embodiments of this application provide an air conditioning system control method, program product, medium, device, and air conditioning system, which can improve the stability of the defrosting process of the air conditioning system.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part by practice of this application.

[0005] According to a first aspect of the embodiments of this application, an air conditioning system control method is provided. The air conditioning system includes an electronic valve, the electronic valve being connected to a first refrigerant pipe and a second refrigerant pipe. The first refrigerant pipe is a refrigerant pipe connecting a four-way valve and an indoor unit, and the second refrigerant pipe is a refrigerant pipe connecting the four-way valve and an outdoor unit. The method includes: before the air conditioning system performs a defrosting operation, controlling the electronic valve to switch from a closed state to an open state; and after the electronic valve remains in the open state for a set time, controlling the electronic valve to switch from the open state to a closed state.

[0006] In some embodiments of this application, based on the foregoing scheme, the method further includes: in heating mode, obtaining the heat exchanger temperature of the outdoor unit; if the duration for which the heat exchanger temperature is less than a first temperature threshold exceeds a first duration threshold, and the duration for which the heat exchanger temperature is less than a second temperature threshold exceeds a second duration threshold, then triggering a control command for the air conditioning system to perform a defrosting action, wherein the first temperature threshold is greater than the second temperature threshold, and the first duration threshold is greater than the second duration threshold.

[0007] In some embodiments of this application, based on the foregoing scheme, the method further includes: controlling the opening degree of the electronic valve to remain at a first preset opening degree within the set time period; or controlling the opening degree of the electronic valve to gradually decrease from a second preset opening degree to a third preset opening degree within the set time period.

[0008] In some embodiments of this application, based on the foregoing scheme, the method further includes: determining a pressure balance parameter before the electronic valve switches from a closed state to an open state, as an initial pressure balance parameter, the pressure balance parameter being used to characterize the degree of balance between the refrigerant pressure in the first refrigerant pipe and the refrigerant pressure in the second refrigerant pipe; and determining the set duration based on the initial pressure balance parameter.

[0009] In some embodiments of this application, based on the foregoing scheme, determining the pressure balance parameter includes: obtaining a first refrigerant pressure in the first refrigerant pipe and a second refrigerant pressure in the second refrigerant pipe; and determining the ratio or difference between the first refrigerant pressure and the second refrigerant pressure as the pressure balance parameter.

[0010] In some embodiments of this application, based on the foregoing scheme, the set duration is determined by the following formula:

[0011] T = min(T1, T2)

[0012] Wherein, T represents the set duration; T1 represents the preset duration parameter; and T2 represents the time it takes for the pressure balance parameter of the air conditioning system to decrease from the initial pressure balance parameter to the preset pressure balance parameter.

[0013] In some embodiments of this application, based on the foregoing scheme, the set duration is positively correlated with the initial pressure balance parameter.

[0014] In some embodiments of this application, based on the foregoing scheme, the method further includes: determining the first preset opening degree or the second preset opening degree based on the initial pressure balance parameter, wherein the first preset opening degree or the second preset opening degree is positively correlated with the initial pressure balance parameter.

[0015] In some embodiments of this application, based on the foregoing scheme, the method further includes: after controlling the electronic valve to switch from an open state to a closed state, controlling the air conditioning system to perform a defrosting action; after the duration of the defrosting action performed by the air conditioning system reaches a third duration threshold, or after the temperature of the heat exchanger of the outdoor unit is greater than or equal to a third temperature threshold, controlling the air conditioning system to stop performing the defrosting action.

[0016] In some embodiments of this application, based on the foregoing scheme, the electronic valve includes a silencer electronic valve.

[0017] According to a second aspect of the embodiments of this application, a computer program product is provided, the computer program product including computer instructions stored in a computer-readable storage medium and adapted to be read and executed by a processor to cause a computer device having the processor to perform an operation as described in any of the embodiments of the first aspect above.

[0018] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by a processor to perform the operation performed by the method described in any of the embodiments of the first aspect above.

[0019] According to a fourth aspect of the present application, an air conditioning system control device is provided, the device including one or more processors and one or more memories, the one or more memories storing at least one piece of program code, the at least one piece of program code being loaded and executed by the one or more processors to perform the operation as described in any of the embodiments of the first aspect above.

[0020] According to a fifth aspect of the present application, an air conditioning system is provided, the air conditioning system including the air conditioning system control device as described in the fourth aspect of the present application.

[0021] Based on the technical solution proposed in this application, before the air conditioning system is about to perform the defrosting action, by controlling the electronic valve between the first refrigerant pipe and the second refrigerant pipe to switch from the closed state to the open state and maintain it for a set period of time, part of the refrigerant in the first refrigerant pipe, which is under high pressure, can be released to the second refrigerant pipe, which is under low pressure. This effectively balances the refrigerant pipe pressure between the indoor unit and the outdoor unit, and prevents strong noise and disturbances caused by excessive refrigerant pressure difference between different refrigerant pipes in the early stage of defrosting, thereby improving the stability of the air conditioning system during the defrosting process.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0024] Figure 1 An air conditioning system architecture diagram is shown, in which the technical solutions of the embodiments of this application can be applied.

[0025] Figure 2 This paper illustrates the relationship between pressure balance and noise levels in one embodiment of this application.

[0026] Figure 3 A flowchart of an air conditioning system control method according to one embodiment of this application is shown;

[0027] Figure 4 This paper illustrates the relationship between the change in pressure balance parameters and the opening duration of the electronic valve in one embodiment of this application.

[0028] Figure 5 A detailed flowchart of an air conditioning system control method according to one embodiment of this application is shown;

[0029] Figure 6 A schematic diagram of the structure of the air conditioning system control device in an embodiment of this application is shown. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0032] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0033] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0034] To enable those skilled in the art to better understand this application, the following will be combined with Figure 1 A brief explanation of the air conditioning system.

[0035] See Figure 1 The diagram illustrates an air conditioning system architecture to which the technical solutions of the embodiments of this application can be applied.

[0036] like Figure 1 As shown, the air conditioning system proposed in this application may include a compressor 108, a four-way valve 112, a first refrigerant pipe 114, a first shut-off valve 113, an indoor unit (including an indoor heat exchanger 115 and an indoor fan 116), a third refrigerant pipe 101, a second shut-off valve 102, a throttling device 103, an outdoor unit (outdoor heat exchanger 105 and outdoor fan 104), a first temperature detection device 107 (for detecting the temperature of the outdoor heat exchanger 105), a second temperature detection device 106 (for detecting the outdoor ambient temperature), a second refrigerant pipe 110, and a pressure sensor 109. The first refrigerant pipe 114 connects the four-way valve 112 to the indoor unit, and the second refrigerant pipe connects the four-way valve 112 to the outdoor unit.

[0037] In heating mode, compressor 108 compresses low-temperature, low-pressure gaseous refrigerant to obtain high-temperature, high-pressure gaseous refrigerant. This high-temperature, high-pressure gaseous refrigerant then flows through ports a and b of four-way valve 112 and into the indoor heat exchanger 115 via the first refrigerant pipe 114. Indoor air exchanges heat with the high-temperature, high-pressure gaseous refrigerant in the indoor heat exchanger 115, absorbing heat and transforming it into medium-temperature, high-pressure liquid refrigerant. The indoor air, by absorbing heat from the refrigerant, experiences a temperature increase, achieving a warming effect. The medium-temperature, high-pressure liquid refrigerant flows into the outdoor heat exchanger 105 via the third refrigerant pipe 101. After absorbing heat from the outdoor air, the refrigerant in the outdoor heat exchanger 105 evaporates into low-temperature, low-pressure gaseous refrigerant. The gaseous refrigerant flowing out of the outdoor heat exchanger 105 returns to compressor 108 via the second refrigerant pipe 110 and ports d and c of four-way valve 112, completing one cycle of the refrigerant in the air conditioning system.

[0038] Here, because the surface of the outdoor heat exchanger 105 experiences a sudden temperature drop below freezing due to heat absorption by the refrigerant, frost will form on its surface over time, affecting its normal operation. In this situation, it is necessary to control the air conditioning system to perform a defrosting action to remove the frost condensed on the surface of the outdoor heat exchanger 105. The existing defrosting action involves switching the air conditioning system to cooling mode. In cooling mode, the high-temperature, high-pressure gaseous refrigerant compressed by the compressor 108 first flows into the outdoor heat exchanger 105 through ports a and d of the four-way valve 112 and the second refrigerant pipe 110. The frost condensed on the surface of the outdoor heat exchanger 105 melts by absorbing heat from the high-temperature, high-pressure gaseous refrigerant, thus achieving the defrosting effect.

[0039] However, air conditioning systems typically generate significant noise and disturbance during the initial defrosting process, severely impacting the user experience.

[0040] The inventors of this application have discovered that when an air conditioning system performs defrosting, it controls the four-way valve to change the flow direction of the refrigerant in the pipes. Because there is a significant pressure difference between the first and second refrigerant pipes on either side of the four-way valve, when the refrigerant flow direction changes, the refrigerants, originally separated by different pressure environments, meet, rapidly triggering a series of hydrodynamic effects. The most obvious manifestation of this is the generation of relatively strong noise and disturbance, thereby reducing the user experience.

[0041] Furthermore, the inventors of this application have discovered that the noise level generated by the air conditioning system during the defrosting process is related to the degree of pressure balance between the refrigerant pressure in the first refrigerant pipe and the refrigerant pressure in the second refrigerant pipe. The inventors of this application have obtained the following results through experiments: Figure 2 The relationship diagram shown is available in [reference]. Figure 2 The diagram illustrates the relationship between pressure balance and noise levels in one embodiment of this application.

[0042] from Figure 2 It can be concluded that the smaller the pressure balance, that is, the greater the pressure difference between the first refrigerant pipe and the second refrigerant pipe, the greater the noise generated when the air conditioning system performs the defrosting action. Based on this, this application proposes an air conditioning system control method to improve the stability of the defrosting process of the air conditioning system.

[0043] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0044] First, this application includes an electronic valve in the air conditioning system, such as... Figure 1As shown, the electronic valve 111 is connected between the first refrigerant pipe 114 and the second refrigerant pipe 110 to balance the pressure difference between them. For specific control methods, please refer to [reference needed]. Figure 3 .

[0045] See Figure 3 A flowchart of an air conditioning system control method according to one embodiment of this application is shown. The air conditioning system includes an electronic valve connected to a first refrigerant pipe and a second refrigerant pipe. The first refrigerant pipe is a refrigerant pipe connecting a four-way valve to an indoor unit, and the second refrigerant pipe is a refrigerant pipe connecting the four-way valve to an outdoor unit. The air conditioning system control method can be executed by a device with computing processing capabilities, such as an air conditioning system control device. (Refer to...) Figure 3 As shown, the air conditioning system control method includes at least steps 310 to 320, which are described in detail below:

[0046] Step 310: Before the air conditioning system performs the defrosting action, control the electronic valve to switch from the closed state to the open state.

[0047] Step 320: After the electronic valve remains in the open state for a set time, control the electronic valve to switch from the open state to the closed state.

[0048] In this application, the electronic valve can be a silencer electronic valve, that is, when the electronic valve is in the open state for pressure balancing, it will not generate much noise, thereby improving the stability of the defrosting process of the air conditioning system.

[0049] In this application, an electronic valve connects a first refrigerant pipe for connecting a four-way valve to the indoor unit and a second refrigerant pipe for connecting the four-way valve to the outdoor unit. Before the air conditioning system performs the defrosting operation, the electronic valve can be switched from a closed state to an open state. In this way, some refrigerant in the high-pressure first refrigerant pipe can be released into the low-pressure second refrigerant pipe, balancing the pressure difference between the refrigerant pressure in the first and second refrigerant pipes. This reduces the pressure difference when the refrigerants meet due to the change in flow direction during the defrosting process, thus avoiding strong noise and disturbance caused by excessive pressure difference when refrigerants meet. This improves the stability of the air conditioning system during the defrosting process and provides users with a more comfortable air conditioning experience.

[0050] Furthermore, in this application, the electronic valve remains open for a set duration, which can fully balance the refrigerant pressure difference between the first and second refrigerant pipes, thereby reducing noise and disturbances generated by the air conditioning system during the initial defrosting process and improving the stability of the defrosting process. After the set duration, by controlling the electronic valve to switch from the open to the closed state, it can be ensured that the air conditioning system can subsequently perform the defrosting process normally.

[0051] In one embodiment of this application, the air conditioning system control method may further perform the following steps 301 to 302:

[0052] Step 301: In heating mode, obtain the heat exchanger temperature of the outdoor unit.

[0053] Step 302: If the duration for which the heat exchanger temperature is below the first temperature threshold exceeds the first duration threshold, and the duration for which the heat exchanger temperature is below the second temperature threshold exceeds the second duration threshold, then a control command is triggered for the air conditioning system to perform a defrosting action, wherein the first temperature threshold is greater than the second temperature threshold, and the first duration threshold is greater than the second duration threshold.

[0054] It is understandable that after an air conditioning system has been running in heating mode for a period of time, the heating efficiency may be affected due to frost buildup on the outdoor unit's heat exchanger. Therefore, the air conditioning system needs to defrost the outdoor unit's heat exchanger. Based on this, this application monitors the temperature of the outdoor unit's heat exchanger in real time to determine whether frost has formed on the heat exchanger. This allows for timely triggering of control commands to the air conditioning system to perform defrosting actions, preventing a decrease in heating efficiency and an increase in energy consumption due to excessive frost buildup on the outdoor unit's heat exchanger. Ultimately, this ensures the heating efficiency of the air conditioning system and improves the user experience when using the air conditioner.

[0055] In one specific embodiment of this application, the first temperature threshold can be 0°C, the second temperature threshold can be -3°C, the first duration threshold can be 45 minutes, and the second duration threshold can be 3 minutes. It is understood that, depending on actual needs, the first temperature threshold, the second temperature threshold, the first duration threshold, and the second duration threshold can also be other parameter values, and this application does not impose further limitations on these.

[0056] In this application, a defrosting control command is triggered on the air conditioning system only when the temperature of the heat exchanger is below the first temperature threshold for a duration exceeding the first duration threshold, and the temperature of the heat exchanger is below the second temperature threshold for a duration exceeding the second duration threshold. This approach improves the accuracy of the air conditioning system's assessment of the outdoor unit's heat exchanger frosting status, avoids unnecessary losses due to frequent defrosting, and ensures the timeliness and effectiveness of the defrosting action.

[0057] In some other embodiments of this application, the control command to trigger the defrosting action of the air conditioning system may be triggered when the duration of the heat exchanger temperature being less than the fourth temperature threshold exceeds the fourth duration threshold. For example, the control command to trigger the defrosting action of the air conditioning system may be triggered when the duration of the heat exchanger temperature being less than -1°C exceeds 20 minutes.

[0058] In some other embodiments of this application, the air conditioning system can also be controlled to trigger a defrosting operation after a fixed interval in heating mode. The fixed interval can be set manually or determined according to the ambient temperature when the air conditioner is running. This application does not impose any further limitations on this.

[0059] Next, this application will further explain the logic for determining the set duration.

[0060] Specifically, in this application, the set duration can be determined according to the following steps 303 to 304:

[0061] Step 303: Determine the pressure balance parameter before the electronic valve switches from the closed state to the open state, as the initial pressure balance parameter. The pressure balance parameter is used to characterize the degree of balance between the refrigerant pressure in the first refrigerant pipe and the refrigerant pressure in the second refrigerant pipe.

[0062] Step 304: Determine the set duration based on the initial pressure balance parameters.

[0063] In this application, since the pressure balance parameter can characterize the degree of balance between the refrigerant pressure in the first refrigerant pipe and the refrigerant pressure in the second refrigerant pipe, by determining the initial pressure balance parameter before the electronic valve switches from the closed state to the open state, the degree of balance between the refrigerant pressure in the first refrigerant pipe and the refrigerant pressure in the second refrigerant pipe can be accurately reflected before the electronic valve is opened. This provides data support for determining the set duration for which the electronic valve remains in the open state, improves the rationality of the set duration determination, and thus can improve the operating efficiency and stability of the entire air conditioning system during the defrosting stage to a certain extent.

[0064] In step 303 above, the pressure balance parameters are determined, which can be specifically performed according to steps 3031 to 3032 as follows:

[0065] Step 3031: Obtain the first refrigerant pressure in the first refrigerant pipe and the second refrigerant pressure in the second refrigerant pipe.

[0066] Step 3032: Determine the ratio or difference between the first refrigerant pressure and the second refrigerant pressure as the pressure balance parameter.

[0067] In this application, it should be noted that the first refrigerant pressure in the first refrigerant pipe and the second refrigerant pressure in the second refrigerant pipe can be directly acquired by a pressure detection device. Alternatively, they can be calculated based on other parameters in the air conditioning system (e.g., the refrigerant temperature in the first and second refrigerant pipes). Specifically, this application does not impose excessive limitations on the process of obtaining the first and second refrigerant pressures.

[0068] In this application, the ratio or difference between the first refrigerant pressure and the second refrigerant pressure is defined as the pressure balance parameter. It is understood that a larger pressure balance parameter indicates a lower degree of balance between the first refrigerant pressure in the first refrigerant pipe and the second refrigerant pressure in the second refrigerant pipe; conversely, a smaller pressure balance parameter indicates a higher degree of balance between the first refrigerant pressure in the first refrigerant pipe and the second refrigerant pressure in the second refrigerant pipe.

[0069] In this application, the ratio or difference between the second refrigerant pressure and the first refrigerant pressure can also be determined as the pressure balance parameter. It is understood that a larger pressure balance parameter indicates a higher degree of balance between the first refrigerant pressure in the first refrigerant pipe and the second refrigerant pressure in the second refrigerant pipe; conversely, a smaller pressure balance parameter indicates a lower degree of balance between the first refrigerant pressure in the first refrigerant pipe and the second refrigerant pressure in the second refrigerant pipe.

[0070] In step 304 above, the set duration can be determined by the following formula (1):

[0071] T = min(T1, T2) (1)

[0072] Wherein, T represents the set duration; T1 represents the preset duration parameter; and T2 represents the time it takes for the pressure balance parameter of the air conditioning system to decrease from the initial pressure balance parameter to the preset pressure balance parameter.

[0073] In this application, for example, if the preset duration parameter T1 is 2 minutes, and the time T2 for the pressure balance parameter of the air conditioning system to decrease from the initial pressure balance parameter to the preset pressure balance parameter is 3 minutes, then the set duration is T = min(T1,T2) = 2 minutes; or, for example, if the preset duration parameter T1 is 2 minutes, and the time T2 for the pressure balance parameter of the air conditioning system to decrease from the initial pressure balance parameter to the preset pressure balance parameter is 1.5 minutes, then the set duration is T = min(T1,T2) = 1.5 minutes.

[0074] It should be noted that when the balance between the first refrigerant pressure in the first refrigerant pipe and the second refrigerant pressure in the second refrigerant pipe is as characterized by the preset pressure balance parameter, the noise and disturbance generated when the air conditioning system performs defrosting can be greatly reduced. For example, taking the pressure balance parameter as the ratio between the first and second refrigerant pressures, the preset pressure balance parameter can be ΔP = 3. It should be noted that the preset pressure balance parameter can be determined based on the actual definition of pressure balance parameters and the actual model of the air conditioner; this application does not impose further limitations on this.

[0075] In this application, the set duration is determined based on the above formula (1). When the time it takes for the pressure balance parameter of the air conditioning system to decrease from the initial pressure balance parameter to the preset pressure balance parameter is less than the preset duration parameter, the time it takes for the pressure balance parameter of the air conditioning system to decrease from the initial pressure balance parameter to the preset pressure balance parameter is determined as the set duration. This ensures that the noise and disturbance generated by the air conditioning system during defrosting are reasonable. When the time it takes for the pressure balance parameter of the air conditioning system to decrease from the initial pressure balance parameter to the preset pressure balance parameter is greater than the preset duration parameter, the preset duration parameter is determined as the set duration. This avoids the air conditioning system having to wait a long time before performing defrosting. Thus, while reducing the noise and disturbance generated by the air conditioning system during defrosting, the timeliness of the defrosting operation of the air conditioning system is ensured, and the stability of the defrosting process of the air conditioning system is improved.

[0076] In step 304 above, the set duration can also be determined by the initial pressure balance parameter, and the set duration is positively correlated with the initial pressure balance parameter.

[0077] In this application, in order to enable those skilled in the art to better understand this application, please refer to... Figure 4 The following explanation uses the ratio of the first refrigerant pressure to the second refrigerant pressure as an example to illustrate the pressure balance parameter. (See [link]). Figure 4 The diagram shows the relationship between the change in pressure balance parameters and the opening time of the electronic valve in one embodiment of this application.

[0078] like Figure 4 As shown, when the initial pressure balance parameter ΔP = 8, the set duration can be 3 minutes to reduce the pressure balance parameter of the air conditioning system from the initial pressure balance parameter to a preset pressure balance parameter (e.g., ΔP = 3); when the initial pressure balance parameter ΔP = 7, the set duration can be 2.3 minutes to reduce the pressure balance parameter of the air conditioning system from the initial pressure balance parameter to the preset pressure balance parameter; when the initial pressure balance parameter ΔP = 5, the set duration can be 1.3 minutes to reduce the pressure balance parameter of the air conditioning system from the initial pressure balance parameter to the preset pressure balance parameter. It should be noted that the set duration can be determined based on the actual definition of the pressure balance parameter and the actual model of the air conditioner; this application does not impose further limitations on this.

[0079] In this application, the set duration is positively correlated with the initial pressure balance parameter. The advantage of determining the set duration through the initial pressure balance parameter is that the pressure balance parameter of the air conditioning system can be reduced from the initial pressure balance parameter to a lower pressure balance parameter (i.e., the preset pressure balance parameter). This ensures that the noise and disturbance generated by the air conditioning system during defrosting are more reasonable and improves the stability of the defrosting process of the air conditioning system.

[0080] In some other embodiments of this application, the set duration may not need to be determined with reference to the initial pressure balance parameter, but a fixed duration may be given, such as 2 min or 2.2 min. This application does not impose any further limitations on this.

[0081] In one embodiment of this application, based on step 320 above, step 321 can be performed as follows:

[0082] Step 321: Within the set time period, control the opening degree of the electronic valve to remain at the first preset opening degree.

[0083] In this application, the electronic valve can maintain a fixed opening (i.e., a first preset opening) to balance the pressure difference between the first refrigerant pressure and the second refrigerant pressure. The larger the first preset opening, the faster some refrigerant in the high-pressure first refrigerant pipe is released into the low-pressure second refrigerant pipe; that is, the electronic valve is more efficient at balancing the pressure difference between the first and second refrigerant pressures. Thus, when the electronic valve maintains a larger first preset opening, the time required for the electronic valve to balance the pressure difference between the first and second refrigerant pressures can be reduced, avoiding a long waiting time for the air conditioning system to perform defrosting and ensuring the timely execution of the defrosting action.

[0084] In another embodiment of this application, in addition to step 320 described above, step 322 may also be performed:

[0085] Step 322: Within the set time period, control the opening degree of the electronic valve to be gradually reduced from the second preset opening degree to the third preset opening degree.

[0086] In this application, the opening degree of the electronic valve can initially be opened to a relatively large degree (i.e., the second preset opening degree). Then, as the pressure difference between the first refrigerant pressure and the second refrigerant pressure decreases, the opening degree of the electronic valve is gradually reduced until a third preset opening degree is reached (for example, the third preset opening degree can be OP, i.e., the electronic valve is in the closed state). In this way, as the opening degree of the electronic valve is gradually reduced, the electronic valve can more accurately balance the pressure difference between the first refrigerant pressure and the second refrigerant pressure to a more reasonable range during the process of balancing the pressure difference between the first refrigerant pressure and the second refrigerant pressure. This ensures that the noise and disturbance generated by the air conditioning system during the defrosting operation are more reasonable, thereby improving the stability of the defrosting process of the air conditioning system.

[0087] In this application, the first preset opening or the second preset opening can be determined according to the following step 323:

[0088] Step 323: Based on the initial pressure balance parameters, determine the first preset opening degree or the second preset opening degree, wherein the first preset opening degree or the second preset opening degree is positively correlated with the initial pressure balance parameters.

[0089] In this application, for example, taking the pressure balance parameter as the ratio between the first refrigerant pressure and the second refrigerant pressure, when the initial pressure balance parameter ΔP = 7, the first preset opening degree can be 400P, and the second preset opening degree can be 480P; when the initial pressure balance parameter ΔP = 5, the first preset opening degree can be 300P, and the second preset opening degree can be 350P. It should be noted that in this application, the first preset opening degree and the second preset opening degree can be equal or unequal.

[0090] In this application, the larger the initial pressure balance parameter, the larger the first preset opening degree and the second preset opening degree will be. In this way, the larger the opening degree of the electronic valve, the higher the efficiency of the electronic valve in balancing the pressure difference between the first refrigerant pressure and the second refrigerant pressure. That is, the time required for the electronic valve to balance the pressure difference between the first refrigerant pressure and the second refrigerant pressure will be shorter. This can avoid the air conditioning system having to wait a long time before it can perform the defrosting action, and ensure the timeliness of the air conditioning system in performing the defrosting action.

[0091] In this application, the air conditioning system control method may further perform the following steps 330 to 340:

[0092] Step 330: After controlling the electronic valve to switch from the open state to the closed state, control the air conditioning system to perform a defrosting action;

[0093] Step 340: After the duration of the defrosting action performed by the air conditioning system reaches the third duration threshold, or after the temperature of the heat exchanger of the outdoor unit is greater than or equal to the third temperature threshold, control the air conditioning system to stop performing the defrosting action.

[0094] In one specific embodiment of this application, the condition for the air conditioning system to end the defrosting operation can be that the duration of the defrosting operation reaches 8 minutes (a third duration threshold), or that the temperature of the outdoor unit's heat exchanger is greater than or equal to 20°C (a third temperature threshold). It is understood that, depending on actual needs, the third duration threshold and the third temperature threshold can also be other parameter values, and this application does not impose further limitations on them.

[0095] In this application, after the electronic valve switches from the open state to the closed state, the air conditioning system begins the defrosting process. The flow direction of the refrigerant in the pipes is changed by the four-way valve. At this time, because the electronic valve has balanced the pressure difference between the first and second refrigerant pressures to a reasonable range, when the high-temperature, high-pressure gaseous refrigerant output from the compressor encounters the refrigerant in the second refrigerant pipe, there will be no significant noise or disturbance due to excessively low refrigerant pressure in the second refrigerant pipe. When the duration of the defrosting process reaches a third duration threshold, or when the temperature of the outdoor unit's heat exchanger is greater than or equal to a third temperature threshold, it can be considered that the frost on the outdoor heat exchanger has been removed. At this point, the air conditioning system can be controlled to stop the defrosting process and restart the heating mode to avoid a prolonged defrosting time that could reduce the user experience.

[0096] To enable those skilled in the art to better understand this application, the following is combined with Figure 5 The air conditioning system control scheme proposed in this application will be illustrated using an embodiment of a specific application scenario.

[0097] See Figure 5 The diagram illustrates a detailed flowchart of an air conditioning system control method according to one embodiment of this application, specifically including steps 501 to 512:

[0098] Step 501: Control the air conditioning system to operate in heating mode.

[0099] Step 502: Determine if the duration of the outdoor unit's heat exchanger temperature t3 < 0℃ is greater than 45 minutes, and the duration of the outdoor unit's heat exchanger temperature t3 < -3℃ is greater than 3 minutes. If yes, proceed to step 504; otherwise, proceed to step 503.

[0100] Step 503: Control the air conditioning system to continue operating in heating mode.

[0101] Step 504: Control the air conditioning system to perform defrosting and noise reduction actions.

[0102] Step 505: The indoor and outdoor units of the air conditioning system remain in the same operating mode, and the electronic valves connecting the first and second refrigerant pipes are opened.

[0103] Step 506: Determine: Is the refrigerant pressure balance parameter ΔP ≤ 3, or is the set duration T ≥ preset duration parameter T1? If yes, proceed to step 508; otherwise, proceed to step 507.

[0104] Step 507: Control the air conditioning system to continue performing the defrosting and noise reduction actions.

[0105] Step 508: Control the air conditioning system to stop performing the defrosting and noise reduction actions.

[0106] Step 509: Control the air conditioning system to perform the defrosting action.

[0107] Step 510: Determine if the defrosting action of the air conditioning system lasts for ≥8 minutes, or if the temperature of the outdoor unit's heat exchanger is ≥20℃. If yes, proceed to step 512; otherwise, proceed to step 511.

[0108] Step 511: Control the air conditioning system to continue performing the defrosting action.

[0109] Step 512: Control the air conditioning system to end the defrosting process and restart the heating mode.

[0110] Based on the technical solution proposed in this application, by setting dual temperature thresholds and dual duration thresholds for judging the frost condition of the outdoor unit heat exchanger, the accuracy of the air conditioning system in judging the frost state of the outdoor unit heat exchanger can be improved. This also avoids the wear and tear on the air conditioning system caused by frequent defrosting, thereby ensuring the timeliness and effectiveness of the defrosting action. In addition, this technical solution dynamically adjusts the set duration and opening degree of the electronic valve in the open state according to the initial pressure balance parameter to balance the pressure difference between the first and second refrigerant pipes. This reduces the pressure balance parameter of the air conditioning system from the initial pressure balance parameter to a lower pressure balance parameter (i.e., the preset pressure balance parameter), thus ensuring that the noise and disturbance generated by the air conditioning system during defrosting are more reasonable, thereby improving the stability of the defrosting process.

[0111] Based on the same inventive concept, embodiments of this application provide a computer program product, the computer program product including computer instructions stored in a computer-readable storage medium and adapted to be read and executed by a processor to cause a computer device having the processor to perform the operations performed as described above.

[0112] Based on the same inventive concept, embodiments of this application provide a computer-readable storage medium storing at least one computer program instruction, which is loaded and executed by a processor to perform the operations described above.

[0113] Figure 6 A schematic diagram of the structure of the air conditioning system control device in an embodiment of this application is shown.

[0114] Based on the same inventive concept, embodiments of this application also provide an air conditioning system control device. (Reference) Figure 6 The diagram shows a schematic of the structure of an air conditioning system control device according to an embodiment of this application. The air conditioning system control device includes one or more memories 604, one or more processors 602, and at least one computer program (program code) stored in the memory 604 and executable on the processor 602. When the processor 602 executes the computer program, it implements the method described above.

[0115] Among them, Figure 6 In this document, a bus architecture (represented by bus 600) is used. Bus 600 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 602 and memory represented by memory 604. Bus 600 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 605 provides an interface between bus 600 and receiver 601 and transmitter 603. Receiver 601 and transmitter 603 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 602 is responsible for managing bus 600 and general processing, while memory 604 can be used to store data used by processor 602 during operation.

[0116] In this application, based on the same inventive concept, an air conditioning system is also proposed, which may include, for example: Figure 6 The air conditioning system control device shown.

[0117] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0118] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0119] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0120] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0121] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for controlling an air conditioning system, characterized in that, The air conditioning system includes an electronic valve, which connects a first refrigerant pipe and a second refrigerant pipe. The first refrigerant pipe is a refrigerant pipe connecting a four-way valve to an indoor unit, and the second refrigerant pipe is a refrigerant pipe connecting the four-way valve to an outdoor unit. The method includes: Before the air conditioning system performs the defrosting action, the electronic valve is controlled to switch from the closed state to the open state; After the electronic valve remains in the open state for a set period of time, the electronic valve is controlled to switch from the open state to the closed state.

2. The method according to claim 1, characterized in that, The method further includes: In heating mode, the temperature of the heat exchanger of the outdoor unit is obtained; If the duration for which the heat exchanger temperature is below the first temperature threshold exceeds the first duration threshold, and the duration for which the heat exchanger temperature is below the second temperature threshold exceeds the second duration threshold, then a control command is triggered for the air conditioning system to perform a defrosting action, wherein the first temperature threshold is greater than the second temperature threshold, and the first duration threshold is greater than the second duration threshold.

3. The method according to claim 1, characterized in that, The method further includes: Within the set time period, the opening degree of the electronic valve is maintained at a first preset opening degree; or Within the set time period, the opening degree of the electronic valve is gradually reduced from the second preset opening degree to the third preset opening degree.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: The pressure balance parameter is determined before the electronic valve switches from the closed state to the open state, and is used as the initial pressure balance parameter. The pressure balance parameter is used to characterize the degree of balance between the refrigerant pressure in the first refrigerant pipe and the refrigerant pressure in the second refrigerant pipe. The set duration is determined based on the initial pressure balance parameters.

5. The method according to claim 4, characterized in that, Determining the pressure balance parameters includes: Obtain the first refrigerant pressure in the first refrigerant pipe and the second refrigerant pressure in the second refrigerant pipe; The ratio or difference between the first refrigerant pressure and the second refrigerant pressure is determined as the pressure balance parameter.

6. The method according to claim 4, characterized in that, The set duration is determined using the following formula: T = min(T1, T2) Wherein, T represents the set duration; T1 represents the preset duration parameter; and T2 represents the time it takes for the pressure balance parameter of the air conditioning system to decrease from the initial pressure balance parameter to the preset pressure balance parameter.

7. The method according to claim 4, characterized in that, The set duration is positively correlated with the initial pressure balance parameter.

8. The method according to claim 4, characterized in that, The method further includes: Based on the initial pressure balance parameters, the first preset opening degree or the second preset opening degree is determined, wherein the first preset opening degree or the second preset opening degree is positively correlated with the initial pressure balance parameters.

9. The method according to claim 1, characterized in that, The method further includes: After controlling the electronic valve to switch from the open state to the closed state, the air conditioning system is controlled to perform a defrosting action; After the duration of the defrosting operation performed by the air conditioning system reaches the third duration threshold, or after the temperature of the heat exchanger of the outdoor unit is greater than or equal to the third temperature threshold, the air conditioning system is controlled to stop performing the defrosting operation.

10. The method according to claim 1, characterized in that, The electronic valve includes a silencer electronic valve.

11. A computer program product, characterized in that, The computer program product includes computer instructions stored in a computer-readable storage medium and adapted to be read and executed by a processor to cause a computer device having the processor to perform the method as claimed in any one of claims 1 to 10.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to perform the operations performed by the method as described in any one of claims 1 to 10.

13. An air conditioning system control device, characterized in that, The method includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to implement the method as claimed in any one of claims 1 to 10.

14. An air conditioning system, characterized in that, The air conditioning system includes the air conditioning system control device as described in claim 13.

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