Air conditioner, control method thereof, and computer readable storage medium

Abstract

The application discloses a control method of an air conditioner, the air conditioner and a computer readable storage medium. The control method of the air conditioner comprises the following steps: controlling an electronic expansion valve of the air conditioner to maintain initial opening degree operation; obtaining a current first discharge temperature of a compressor of the air conditioner during the operation of the electronic expansion valve at the initial opening degree; and when the first discharge temperature is greater than a discharge temperature threshold, adjusting the opening degree of the electronic expansion valve according to the first discharge temperature, so that the temperature difference between the first discharge temperature and a target discharge temperature of the air conditioner is less than a first set temperature difference. The application aims to improve the stability of air conditioner discharge in the capacity test mode, thereby improving the accuracy of the air conditioner capacity test result.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a control method for an air conditioner, an air conditioner, and a computer-readable storage medium. Background Technology

[0002] With the development of economy and technology, air conditioners are being used more and more widely, and their performance is constantly being optimized. During the production or research and development phase of air conditioners, capacity testing is generally required to determine the operating parameters that meet energy efficiency requirements.

[0003] Currently, during the air conditioner capacity test, the electronic expansion valve is generally adjusted at preset fixed intervals. This can easily cause large fluctuations in the air conditioner's exhaust, affecting the accuracy of the air conditioner capacity test results. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for an air conditioner, an air conditioner, and a computer-readable storage medium, which aims to improve the stability of the air conditioner's exhaust in a capacity test mode, thereby improving the accuracy of the air conditioner capacity test results.

[0005] To achieve the above objectives, the present invention provides a control method for an air conditioner, the control method comprising the following steps:

[0006] The electronic expansion valve of the air conditioner is controlled to maintain its initial opening.

[0007] During the operation of the electronic expansion valve at the initial opening, the current first discharge temperature of the air conditioner's compressor is obtained;

[0008] When the first exhaust temperature is greater than the exhaust temperature threshold, the opening of the electronic expansion valve is adjusted according to the first exhaust temperature so that the temperature difference between the first exhaust temperature and the target exhaust temperature of the air conditioner is less than the first set temperature difference.

[0009] Optionally, the step of adjusting the opening of the electronic expansion valve according to the first exhaust temperature includes:

[0010] Determine a first temperature difference between the first exhaust temperature and the target exhaust temperature;

[0011] When the first temperature difference is less than or equal to the first set temperature difference, the electronic expansion valve is controlled to maintain the current opening.

[0012] When the first temperature difference is greater than the first set temperature difference, the opening of the electronic expansion valve is adjusted according to the first relationship between the first exhaust temperature and the target exhaust temperature.

[0013] Optionally, after the step of adjusting the opening of the electronic expansion valve according to the first relationship between the first exhaust temperature and the target exhaust temperature, the method further includes:

[0014] After a first preset time interval, return to the step of obtaining the current first exhaust temperature of the air conditioner's compressor.

[0015] Optionally, the control method for the air conditioner further includes:

[0016] The first preset duration is determined based on the first temperature difference value, and the first preset duration is negatively correlated with the first temperature difference value.

[0017] Optionally, the step of adjusting the opening of the electronic expansion valve according to the first magnitude relationship between the first exhaust temperature and the target exhaust temperature includes:

[0018] When the first size relationship is such that the first exhaust temperature is less than the target exhaust temperature, the electronic expansion valve is controlled to reduce its opening.

[0019] When the first size relationship is such that the first exhaust temperature is greater than the target exhaust temperature, the electronic expansion valve is controlled to increase its opening.

[0020] Optionally, the step of controlling the electronic expansion valve to reduce its opening when the first size relationship is that the first exhaust temperature is less than the target exhaust temperature includes:

[0021] When the first size relationship is that the first exhaust temperature is less than the target exhaust temperature, the first opening adjustment range is determined according to the first temperature difference value, and the first opening adjustment range is positively correlated with the first temperature difference value;

[0022] The electronic expansion valve is controlled to reduce its opening based on the first opening adjustment range.

[0023] Optionally, the step of controlling the electronic expansion valve to increase its opening when the first size relationship is such that the first exhaust temperature is greater than the target exhaust temperature includes:

[0024] When the first size relationship is that the first exhaust temperature is greater than the target exhaust temperature, the second opening adjustment range is determined according to the first temperature difference value, and the second opening adjustment range is positively correlated with the first temperature difference value;

[0025] The electronic expansion valve is controlled to increase its opening degree according to the second opening degree adjustment range.

[0026] Optionally, after the step of adjusting the opening of the electronic expansion valve according to the first exhaust temperature, the method further includes:

[0027] When the temperature difference between the first exhaust temperature and the target exhaust temperature is less than or equal to the first set temperature difference, the current first exhaust temperature change value of the air conditioner's compressor is obtained.

[0028] When the first exhaust temperature change value is less than the first preset temperature change value and continues for a second preset duration, the current second exhaust temperature of the air conditioner's compressor is obtained;

[0029] The opening of the electronic expansion valve is adjusted according to the second exhaust temperature so that the temperature difference between the second exhaust temperature and the target exhaust temperature is less than the second set temperature difference, and the second set temperature difference is less than the first set temperature difference.

[0030] Optionally, the step of adjusting the opening of the electronic expansion valve according to the second exhaust temperature includes:

[0031] Determine a second temperature difference between the second exhaust temperature and the target exhaust temperature;

[0032] When the second temperature difference value is less than or equal to the second set temperature difference, the electronic expansion valve is controlled to maintain the current opening degree.

[0033] When the second temperature difference is greater than the second set temperature difference, the opening of the electronic expansion valve is adjusted according to the second relationship between the second exhaust temperature and the target exhaust temperature.

[0034] Optionally, before the step of adjusting the opening of the electronic expansion valve according to the second exhaust temperature, the method further includes:

[0035] Obtain the current opening degree of the electronic expansion valve;

[0036] The second set temperature difference is determined based on the current opening degree, and the second set temperature difference is negatively correlated with the current opening degree.

[0037] Optionally, after the step of controlling the electronic expansion valve to maintain its current opening, the method further includes:

[0038] After a third preset time interval, return to the step of obtaining the current second exhaust temperature of the air conditioner's compressor.

[0039] Optionally, after the step of adjusting the opening of the electronic expansion valve according to the second relationship between the second exhaust temperature and the target exhaust temperature, the method further includes:

[0040] Obtain the current second exhaust temperature change value of the air conditioner's compressor. If the second exhaust temperature change value is less than the second preset temperature change value and continues for a fourth preset time, return to the step of obtaining the current second exhaust temperature of the air conditioner's compressor.

[0041] Optionally, the step of adjusting the opening of the electronic expansion valve according to the second relationship between the second exhaust temperature and the target exhaust temperature includes:

[0042] When the second size relationship is such that the second exhaust temperature is less than the target exhaust temperature, the electronic expansion valve is controlled to reduce its opening.

[0043] When the second size relationship is such that the second exhaust temperature is greater than the target exhaust temperature, the electronic expansion valve is controlled to increase its opening.

[0044] Furthermore, in order to achieve the above objectives, this application also proposes an air conditioner, the air conditioner comprising:

[0045] A heat pump system, the heat pump system including an electronic expansion valve;

[0046] A control device, wherein the electronic expansion valve is connected to the control device, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method as described in any of the preceding claims.

[0047] In addition, to achieve the above objectives, this application also proposes a computer-readable storage medium storing a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for the air conditioner as described in any of the preceding claims.

[0048] This invention proposes a control method for an air conditioner. This method detects the current exhaust temperature of the air conditioner compressor while the electronic expansion valve maintains its initial opening. When the exhaust temperature exceeds a threshold value, the opening of the electronic expansion valve is adjusted according to the air conditioner's exhaust temperature. Instead of adjusting the opening of the electronic expansion valve according to a preset fixed duration, the method adjusts the opening based on the actual exhaust conditions of the air conditioner. This effectively avoids large fluctuations in the air conditioner's exhaust during capacity testing, improves the stability of the air conditioner's exhaust during capacity testing, and thus improves the accuracy of the air conditioner capacity test results. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air conditioner of the present invention;

[0050] Figure 2 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0051] Figure 3This is a flowchart illustrating another embodiment of the control method for the air conditioner of the present invention.

[0052] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0054] The main solution of this invention is: controlling the electronic expansion valve of the air conditioner to maintain its initial opening; during the operation of the electronic expansion valve at the initial opening, obtaining the current first exhaust temperature of the air conditioner's compressor; when the first exhaust temperature is greater than the exhaust temperature threshold, adjusting the opening of the electronic expansion valve according to the first exhaust temperature, so that the temperature difference between the first exhaust temperature and the target exhaust temperature of the air conditioner is less than the first set temperature difference.

[0055] In existing technologies, during air conditioner capacity testing, the electronic expansion valve typically adjusts its opening at pre-set fixed intervals. This can easily cause large fluctuations in the air conditioner's exhaust, affecting the accuracy of the air conditioner capacity test results.

[0056] The present invention provides the above-mentioned solution, which aims to improve the stability of air conditioner exhaust under capacity test mode, thereby improving the accuracy of air conditioner capacity test results.

[0057] This invention provides an air conditioner. The air conditioner can be any type of heat pump air conditioner, such as a wall-mounted air conditioner, a cabinet air conditioner, a portable air conditioner, a multi-split air conditioner, a window air conditioner, or a ceiling-mounted air conditioner, etc.

[0058] In this embodiment of the invention, the air conditioner includes a heat pump system 1 and a control device 2. The heat pump system 1 includes a compressor, a first heat exchanger, an electronic expansion valve and a second heat exchanger connected in sequence. The compressor and the electronic expansion valve are both connected to the control device 2.

[0059] Furthermore, in this embodiment, the air conditioner also includes a temperature sensor located on the exhaust side of the compressor. The temperature sensor is used to detect the exhaust temperature of the air conditioner. The temperature sensor is connected to the control device 2, and the control device 2 can acquire the data detected by the temperature sensor.

[0060] In this embodiment of the invention, reference is made to Figure 1The control device 2 of the air conditioner includes: a processor 1001 (e.g., CPU), a memory 1002, a timer 1003, etc. These components are connected via a communication bus. The memory 1002 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0061] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0062] like Figure 1 As shown, the memory 1002, which is a computer-readable storage medium, may include a control program for an air conditioner. Figure 1 In the device shown, the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1002 and execute the relevant steps of the control method of the air conditioner in the following embodiments.

[0063] This invention also provides a control method for an air conditioner, applied to the aforementioned air conditioner.

[0064] Reference Figure 2 This application proposes an embodiment of a control method for an air conditioner. In this embodiment, the control method for the air conditioner includes:

[0065] Step S10: Control the electronic expansion valve of the air conditioner to maintain its initial opening.

[0066] Specifically, step S10 can be executed when the air conditioner starts in capacity test mode. Capacity test mode is a mode that tests the capacity parameters of the air conditioner under target operating conditions. The initial opening degree can be determined according to the target operating conditions corresponding to the capacity test mode; different target operating conditions can correspond to different opening degrees.

[0067] In this embodiment, the electronic expansion valve is a throttling device between the indoor and outdoor heat exchangers. In other embodiments, the electronic expansion valve may also be a throttling device located elsewhere in the heat pump system related to exhaust gas.

[0068] Step S20: During the operation of the electronic expansion valve at the initial opening, the current first discharge temperature of the air conditioner's compressor is obtained;

[0069] The specific exhaust temperature can be obtained by reading the data currently detected by the temperature sensor installed at the compressor exhaust port.

[0070] Step S30: When the first exhaust temperature is greater than the exhaust temperature threshold, adjust the opening of the electronic expansion valve according to the first exhaust temperature so that the temperature difference between the first exhaust temperature and the target exhaust temperature of the air conditioner is less than the first set temperature difference.

[0071] The exhaust temperature threshold can be the target exhaust temperature of the air conditioner, or it can be a pre-set exhaust temperature value that differs from the target exhaust temperature. The exhaust temperature threshold can be lower than the target exhaust temperature, which is beneficial for adjusting the exhaust temperature in advance to avoid excessively high exhaust temperatures.

[0072] When the first exhaust temperature exceeds the exhaust temperature threshold, it indicates that the first exhaust temperature is too high and is in an unstable state. It is necessary to adjust the opening of the electronic expansion valve to ensure the exhaust stability of the air conditioner.

[0073] The target exhaust temperature is specifically the exhaust temperature value corresponding to the optimal efficiency that the air conditioner can achieve under the pre-set current capacity test mode. Specifically, the target exhaust temperature may vary depending on the compressor's operating frequency and / or the air conditioner's fan speed.

[0074] The first set temperature difference is specifically the maximum temperature difference between the actual exhaust temperature and the target exhaust temperature when the air conditioner's exhaust is stable.

[0075] Specifically, the opening control parameters of the electronic expansion valve can be determined based on the first exhaust temperature, and the operation of the electronic expansion valve can be controlled according to the determined opening control parameters. The opening control parameters are specifically parameters for adjusting the opening of the electronic expansion valve with the aim of ensuring that the temperature difference between the air conditioner exhaust temperature and the target exhaust temperature is less than a first set temperature difference. The opening control parameters may include the target opening value of the electronic expansion valve, the direction of opening adjustment (such as increasing or decreasing the opening), the opening adjustment range, and / or the opening adjustment rate.

[0076] Different first exhaust temperatures correspond to different opening control parameters. The correspondence between the first exhaust temperature and the opening control parameters can be preset, and the opening control parameters corresponding to the first exhaust temperature are determined based on this correspondence. Specifically, the opening adjustment direction of the electronic expansion valve can be determined based on the first exhaust temperature. Further, based on the determined opening adjustment direction, the opening adjustment range of the electronic expansion valve can be determined according to the first exhaust temperature. Alternatively, the target opening value of the electronic expansion valve can be determined based on the first exhaust temperature. Or, the opening adjustment rate of the electronic expansion valve can be determined based on the first exhaust temperature, and so on.

[0077] This invention proposes a control method for an air conditioner. During the startup phase of the air conditioner's capacity test mode, the method detects the air conditioner's exhaust temperature while the electronic expansion valve maintains its initial opening. When the exhaust temperature exceeds a threshold value, the opening of the electronic expansion valve is adjusted according to the air conditioner's exhaust temperature. Instead of adjusting the opening of the electronic expansion valve according to a preset fixed duration, the opening is adjusted based on the actual exhaust conditions of the air conditioner. This effectively avoids large fluctuations in the air conditioner's exhaust during the capacity test mode, improves the stability of the air conditioner's exhaust during the capacity test mode, and thus improves the accuracy of the air conditioner's capacity test results.

[0078] Furthermore, in the above embodiments, the step of adjusting the opening degree of the electronic expansion valve according to the first exhaust temperature includes:

[0079] Step S31: Determine the first temperature difference between the first exhaust temperature and the target exhaust temperature;

[0080] In this embodiment, the first temperature difference is the absolute value of the difference between the first exhaust temperature and the target exhaust temperature. In other embodiments, the first temperature difference may also be the difference between the first exhaust temperature and the target exhaust temperature.

[0081] Step S32: When the first temperature difference value is less than or equal to the first set temperature difference, control the electronic expansion valve to maintain the current opening degree.

[0082] Step S33: When the first temperature difference is greater than the first set temperature difference, adjust the opening of the electronic expansion valve according to the first relationship between the first exhaust temperature and the target exhaust temperature.

[0083] Different initial size relationships correspond to different initial opening adjustment directions. Specifically, the initial opening adjustment direction here refers to the electronic expansion valve opening adjustment direction used to reduce the temperature difference between the actual exhaust temperature and the target exhaust temperature of the air conditioner.

[0084] In this embodiment, when the first magnitude relationship is that the first exhaust temperature is less than the target exhaust temperature, the electronic expansion valve is controlled to increase its opening; when the first magnitude relationship is that the first exhaust temperature is greater than the target exhaust temperature, the electronic expansion valve is controlled to decrease its opening. In other embodiments, depending on the different positions of the electronic expansion valve, when the first magnitude relationship is that the first exhaust temperature is less than the target exhaust temperature, the electronic expansion valve is controlled to decrease its opening; when the first magnitude relationship is that the first exhaust temperature is greater than the target exhaust temperature, the electronic expansion valve is controlled to increase its opening.

[0085] In this embodiment, when the first temperature difference is less than or equal to the set temperature difference, it indicates that the current exhaust temperature of the air conditioner is close to the target exhaust temperature and there is no significant fluctuation. At this time, maintaining the opening of the electronic expansion valve can maintain the exhaust stability in the capability test mode. When the temperature difference is greater than the set temperature difference, it indicates that the current first exhaust temperature of the air conditioner deviates significantly from the target exhaust temperature and is prone to significant fluctuations. At this time, the opening of the electronic expansion valve is adjusted by increasing or decreasing the relative size of the first exhaust temperature and the target exhaust temperature to reduce the temperature difference between the first exhaust temperature and the target exhaust temperature, thereby avoiding significant fluctuations in the air conditioner's exhaust and improving the exhaust stability in the capability test mode by adjusting the opening of the electronic expansion valve.

[0086] Furthermore, during the process of increasing or decreasing the opening of the electronic expansion valve, the opening adjustment parameters of the electronic expansion valve (such as the opening adjustment range and / or opening adjustment rate, etc.) can be preset adjustment parameters, and the opening of the electronic expansion valve can be increased or decreased according to the preset opening adjustment parameters. Alternatively, the target opening adjustment parameters (such as the target opening adjustment range and / or target opening adjustment rate, etc.) can be determined based on the temperature difference between the first exhaust temperature and the target exhaust temperature, and the opening of the electronic expansion valve can be increased or decreased according to the target opening adjustment parameters.

[0087] Specifically, in this embodiment, the step of controlling the electronic expansion valve to decrease its opening when the first magnitude relationship is that the first exhaust temperature is less than the target exhaust temperature includes: determining a first opening adjustment range based on the first temperature difference value, wherein the first opening adjustment range is positively correlated with the first temperature difference value; and controlling the electronic expansion valve to decrease its opening based on the first opening adjustment range. The step of controlling the electronic expansion valve to increase its opening when the first magnitude relationship is that the first exhaust temperature is greater than the target exhaust temperature includes: determining a second opening adjustment range based on the first temperature difference value, wherein the second opening adjustment range is positively correlated with the first temperature difference value; and controlling the electronic expansion valve to increase its opening based on the second opening adjustment range.

[0088] The first correspondence between the first temperature difference value and the first opening adjustment range can be preset. This first correspondence can be a calculation relationship, a mapping relationship, etc. Based on this first correspondence, the first opening adjustment range can be calculated from the first temperature difference value, or the result obtained by querying the mapping relationship using the first temperature difference value can be used as the first opening adjustment range. Similarly, the second correspondence between the second temperature difference value and the second opening adjustment range can be preset. This second correspondence can be a calculation relationship, a mapping relationship, etc. Based on this second correspondence, the second opening adjustment range can be calculated from the second temperature difference value, or the result obtained by querying the mapping relationship using the second temperature difference value can be used as the second opening adjustment range.

[0089] Specifically, in this embodiment, the first opening adjustment range or the second opening adjustment range is defined as ΔP. ​​The correspondence between the first temperature difference value |Tp-Tg| (where Tp is the first exhaust temperature and Tg is the target exhaust temperature) and ΔP is shown in the table below:

[0090]

[0091] Based on this, the numerical range of the first temperature difference value is determined, and the amplitude value corresponding to this range is used as the current adjustment range of the electronic expansion valve opening. For example, when Tp is less than Ta, the first temperature difference value is 3.5, and the first opening adjustment range is 3, so the opening of the electronic expansion valve can be increased by 3 steps; when Tp is greater than Ta, the first temperature difference value is 6.5, and the second opening adjustment range is 4, so the opening of the electronic expansion valve can be decreased by 4 steps.

[0092] In this embodiment, when the first exhaust temperature deviates from the target exhaust temperature, the opening of the electronic expansion valve is increased or decreased according to the opening adjustment range determined by the first temperature difference value. This ensures that the adjustment of the electronic expansion valve is more accurate and helps the air conditioner to quickly reach a stable state in the capacity test mode.

[0093] Furthermore, in this embodiment, after the step of adjusting the opening of the electronic expansion valve according to the relationship between the first exhaust temperature and the target exhaust temperature, the method further includes: returning to the step of determining the first temperature difference value between the first exhaust temperature and the target exhaust temperature after an interval of a first preset time.

[0094] The first preset duration can be a fixed duration set in advance, or it can be a duration determined according to the current operating status of the air conditioner.

[0095] Specifically, during the process of controlling the electronic expansion valve to increase or decrease its opening according to the opening adjustment direction, when increasing or decreasing the opening according to the opening adjustment range, timing can begin when the electronic expansion valve increases or decreases to the target opening corresponding to the opening adjustment range. When the electronic expansion valve maintains the target opening for a first preset duration, the process returns to the step of obtaining the current first discharge temperature of the air conditioner's compressor. When increasing or decreasing the opening according to the opening adjustment rate, timing can begin when the electronic expansion valve opening increases or decreases according to the opening adjustment rate and is maintained for a first preset duration.

[0096] Here, the opening of the electronic expansion valve can be adjusted cyclically based on the first exhaust temperature until the first temperature difference value is adjusted to be less than or equal to the first set temperature difference, so that the exhaust in the air conditioner capacity test mode reaches a stable state.

[0097] In this embodiment, the first preset duration is determined based on the first temperature difference value, and the first preset duration is negatively correlated with the first temperature difference value. Specifically, different first temperature difference values ​​correspond to different first preset durations. A first correspondence between the first temperature difference value and the first preset duration can be established in advance. The first correspondence can be a mapping relationship, a calculation relationship, etc. Based on the first correspondence, the first preset duration can be calculated using the first temperature difference value; alternatively, the mapping relationship can be queried using the first temperature difference value, and the matching result can be used as the first preset duration.

[0098] In this embodiment, the correspondence between the first temperature difference value |Tp-Tg| and the first preset time duration Ts is shown in the table below.

[0099]

[0100] Based on this, the numerical range containing the first temperature difference value is determined, and the duration corresponding to this numerical range is used as the first preset duration. For example, if the first temperature difference value is 3.5, the first preset duration is 60 seconds.

[0101] In this embodiment, the opening adjustment cycle of the electronic expansion valve is adjusted according to the first temperature difference value, so as to ensure that when the exhaust temperature difference value is large, the exhaust can quickly reach a stable state through multiple opening adjustments of the electronic expansion valve, and when the exhaust temperature difference value is small, the number of opening adjustments is reduced to further improve the exhaust stability.

[0102] Furthermore, based on any of the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 3 After step S30, the following steps are also included:

[0103] Step S40: When the temperature difference between the first exhaust temperature and the target exhaust temperature is less than or equal to the first set temperature difference, obtain the current first exhaust temperature change value of the air conditioner's compressor.

[0104] When the first temperature difference is less than or equal to the first set temperature difference, the electronic expansion valve is controlled to maintain its current opening while the first exhaust temperature change value is obtained.

[0105] Specifically, during the process of maintaining the current opening of the electronic expansion valve, the exhaust temperature of the air conditioner can be detected at set intervals. Two adjacent exhaust temperature values ​​can be defined as a first temperature value and a second temperature value, respectively. Based on the first and second temperature values, a first exhaust temperature change value can be determined, resulting in multiple first exhaust temperature change values. The first exhaust temperature change value can be the amplitude of the exhaust temperature change; specifically, the absolute value of the difference between the first and second temperature values ​​can be used as the first exhaust temperature change value. Alternatively, the first exhaust temperature change value can be the exhaust temperature change rate; after determining the absolute value of the difference between the first and second temperature values, the ratio of this absolute value to the aforementioned set time interval can be used as the first exhaust temperature change value.

[0106] Step S50: When the first exhaust temperature change value is less than the first preset temperature change value and continues for a second preset duration, obtain the current second exhaust temperature of the air conditioner's compressor;

[0107] Step S60: Adjust the opening of the electronic expansion valve according to the second exhaust temperature so that the temperature difference between the second exhaust temperature and the target exhaust temperature is less than the second set temperature difference, and the second set temperature difference is less than the first set temperature difference.

[0108] When multiple first exhaust temperature change values ​​obtained within the second preset time period are all less than the first preset temperature change value, the air conditioner can be controlled to enter the closed-loop control stage of the electronic expansion valve. During the closed-loop control stage, the opening degree of the electronic expansion valve is adjusted according to the current exhaust temperature of the air conditioner.

[0109] Specifically, a second temperature difference value is determined between the second exhaust temperature and the target exhaust temperature; when the second temperature difference value is less than or equal to the second set temperature difference, the electronic expansion valve is controlled to maintain its current opening; when the second temperature difference value is greater than the second set temperature difference, the opening of the electronic expansion valve is adjusted according to a second relationship between the second exhaust temperature and the target exhaust temperature.

[0110] The step of adjusting the opening of the electronic expansion valve according to the second magnitude relationship between the second exhaust temperature and the target exhaust temperature includes: when the second magnitude relationship is that the second exhaust temperature is less than the target exhaust temperature, controlling the electronic expansion valve to decrease its opening; when the second magnitude relationship is that the second exhaust temperature is greater than the target exhaust temperature, controlling the electronic expansion valve to increase its opening.

[0111] In this embodiment, the process of adjusting the opening of the electronic expansion valve according to the current second exhaust temperature is analogous to the specific implementation process of adjusting the opening of the electronic expansion valve according to the current first exhaust temperature in the above embodiment, and will not be repeated here. It should be noted that the adjustment range of the electronic expansion valve opening when increasing or decreasing it according to the current second exhaust temperature is smaller than the adjustment range of the electronic expansion valve opening when increasing or decreasing it according to the current first exhaust temperature.

[0112] In this embodiment, based on the opening of the first exhaust temperature regulating electronic expansion valve to quickly adjust the exhaust to a stable state (with minimal change in exhaust temperature), the opening of the second exhaust temperature regulating electronic expansion valve is further adapted to maintain the exhaust of the air conditioner in a stable state.

[0113] Furthermore, in this embodiment, before the step of adjusting the opening of the electronic expansion valve according to the second exhaust temperature, the method further includes: obtaining the current opening of the electronic expansion valve; determining the second set temperature difference based on the current opening, wherein the second set temperature difference is negatively correlated with the current opening.

[0114] The second set temperature difference will vary depending on the current opening degree. Specifically, the larger the current opening degree, the smaller the corresponding second set temperature difference, and vice versa.

[0115] Specifically, the current opening degree can be determined within a certain range, and a corresponding preset temperature difference value can be obtained as the second preset temperature difference based on this range. Specifically, when the current opening degree is within a first range, the first preset temperature difference is determined to be the second preset temperature difference; when the current opening degree is within a second range, the second preset temperature difference is determined to be the second preset temperature difference. The first preset temperature difference value is greater than the second preset temperature difference value, and the opening degree of the first range is less than the opening degree of the second range. For example, in this embodiment, the second preset temperature difference = K+1; when the current opening degree P > 30, K = 0; when P ≤ 30, K = 1.

[0116] In this embodiment, the second set temperature difference is determined based on the opening degree of the electronic expansion valve. When the opening degree is large and the exhaust gas is less prone to fluctuation, a smaller second set temperature difference is used, while when the opening degree is small and the exhaust gas is more prone to fluctuation, a larger second set temperature difference is used. This makes the electronic expansion valve opening adjustment process based on the second set temperature difference more accurate, ensuring that the regulation of the electronic expansion valve can further improve the exhaust gas stability in the capability test mode.

[0117] Furthermore, in this embodiment, after the step of controlling the electronic expansion valve to maintain its current opening, the method further includes:

[0118] After a third preset time interval, return to the step of obtaining the current second exhaust temperature of the air conditioner's compressor;

[0119] And / or, after the step of adjusting the opening of the electronic expansion valve according to the second magnitude relationship between the second exhaust temperature and the target exhaust temperature, the method further includes:

[0120] Obtain the current second exhaust temperature change value of the air conditioner's compressor. If the second exhaust temperature change value is less than the second preset temperature change value and continues for a fourth preset time, return to the step of obtaining the current second exhaust temperature of the air conditioner's compressor.

[0121] In this embodiment, the opening degree of the electronic expansion valve can be adapted to the exhaust temperature for closed-loop control through the above method, thereby ensuring that the exhaust temperature of the air conditioner is stabilized at the target exhaust temperature through precise adjustment of the opening degree of the electronic expansion valve, so as to further improve the exhaust stability in the capability test mode.

[0122] Furthermore, this invention also proposes a computer-readable storage medium storing a control program for an air conditioner. When the control program is executed by a processor, it implements the relevant steps of any of the above-described air conditioner control methods.

[0123] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0124] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0125] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0126] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The control method for the air conditioner includes the following steps: The electronic expansion valve of the air conditioner is controlled to maintain its initial opening. During the operation of the electronic expansion valve at the initial opening, the current first discharge temperature of the air conditioner's compressor is obtained; When the first exhaust temperature is greater than the exhaust temperature threshold, the opening of the electronic expansion valve is adjusted according to the first exhaust temperature so that the temperature difference between the first exhaust temperature and the target exhaust temperature of the air conditioner is less than the first set temperature difference. When the temperature difference between the first exhaust temperature and the target exhaust temperature is less than or equal to the first set temperature difference, the current first exhaust temperature change value of the air conditioner's compressor is obtained. When the first exhaust temperature change value is less than the first preset temperature change value and continues for a second preset duration, the current second exhaust temperature of the air conditioner's compressor is obtained; The opening of the electronic expansion valve is adjusted according to the second exhaust temperature so that the temperature difference between the second exhaust temperature and the target exhaust temperature is less than the second set temperature difference, and the second set temperature difference is less than the first set temperature difference.

2. The control method for an air conditioner as described in claim 1, characterized in that, The step of adjusting the opening of the electronic expansion valve according to the first exhaust temperature includes: Determine a first temperature difference between the first exhaust temperature and the target exhaust temperature; When the first temperature difference is less than or equal to the first set temperature difference, the electronic expansion valve is controlled to maintain the current opening. When the first temperature difference is greater than the first set temperature difference, the opening of the electronic expansion valve is adjusted according to the first relationship between the first exhaust temperature and the target exhaust temperature.

3. The control method for an air conditioner as described in claim 2, characterized in that, After the step of adjusting the opening of the electronic expansion valve according to the first relationship between the first exhaust temperature and the target exhaust temperature, the method further includes: After a first preset time interval, return to the step of obtaining the current first exhaust temperature of the air conditioner's compressor.

4. The control method for an air conditioner as described in claim 3, characterized in that, The control method for the air conditioner also includes: The first preset duration is determined based on the first temperature difference value, and the first preset duration is negatively correlated with the first temperature difference value.

5. The control method for an air conditioner as described in claim 2, characterized in that, The step of adjusting the opening of the electronic expansion valve according to the first relationship between the first exhaust temperature and the target exhaust temperature includes: When the first size relationship is such that the first exhaust temperature is less than the target exhaust temperature, the electronic expansion valve is controlled to reduce its opening. When the first size relationship is such that the first exhaust temperature is greater than the target exhaust temperature, the electronic expansion valve is controlled to increase its opening.

6. The control method for an air conditioner as described in claim 5, characterized in that, The step of controlling the electronic expansion valve to reduce its opening when the first size relationship is such that the first exhaust temperature is less than the target exhaust temperature includes: When the first size relationship is that the first exhaust temperature is less than the target exhaust temperature, the first opening adjustment range is determined according to the first temperature difference value, and the first opening adjustment range is positively correlated with the first temperature difference value; The electronic expansion valve is controlled to reduce its opening based on the first opening adjustment range.

7. The control method for an air conditioner as described in claim 5, characterized in that, The step of controlling the electronic expansion valve to increase its opening when the first size relationship is such that the first exhaust temperature is greater than the target exhaust temperature includes: When the first size relationship is that the first exhaust temperature is greater than the target exhaust temperature, the second opening adjustment range is determined according to the first temperature difference value, and the second opening adjustment range is positively correlated with the first temperature difference value; The electronic expansion valve is controlled to increase its opening degree according to the second opening degree adjustment range.

8. The control method for an air conditioner as described in any one of claims 1 to 7, characterized in that, The step of adjusting the opening of the electronic expansion valve according to the second exhaust temperature includes: Determine a second temperature difference between the second exhaust temperature and the target exhaust temperature; When the second temperature difference value is less than or equal to the second set temperature difference, the electronic expansion valve is controlled to maintain the current opening degree. When the second temperature difference is greater than the second set temperature difference, the opening of the electronic expansion valve is adjusted according to the second relationship between the second exhaust temperature and the target exhaust temperature.

9. The control method for an air conditioner as described in claim 8, characterized in that, Before the step of adjusting the opening of the electronic expansion valve according to the second exhaust temperature, the method further includes: Obtain the current opening degree of the electronic expansion valve; The second set temperature difference is determined based on the current opening degree, and the second set temperature difference is negatively correlated with the current opening degree.

10. The control method for an air conditioner as described in claim 8, characterized in that, After the step of controlling the electronic expansion valve to maintain its current opening, the method further includes: After a third preset time interval, return to the step of obtaining the current second exhaust temperature of the air conditioner's compressor.

11. The control method for an air conditioner as described in claim 8, characterized in that, After the step of adjusting the opening of the electronic expansion valve according to the second relationship between the second exhaust temperature and the target exhaust temperature, the method further includes: Obtain the current second exhaust temperature change value of the air conditioner's compressor. If the second exhaust temperature change value is less than the second preset temperature change value and continues for a fourth preset time, return to the step of obtaining the current second exhaust temperature of the air conditioner's compressor.

12. The control method for an air conditioner as described in claim 8, characterized in that, The step of adjusting the opening of the electronic expansion valve according to the second relationship between the second exhaust temperature and the target exhaust temperature includes: When the second size relationship is such that the second exhaust temperature is less than the target exhaust temperature, the electronic expansion valve is controlled to reduce its opening. When the second size relationship is such that the second exhaust temperature is greater than the target exhaust temperature, the electronic expansion valve is controlled to increase its opening.

13. An air conditioner, characterized in that, The air conditioner includes: A heat pump system, the heat pump system including an electronic expansion valve; A control device, wherein the electronic expansion valve is connected to the control device, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method as described in any one of claims 1 to 12.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for an air conditioner as described in any one of claims 1 to 12.

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