Control method of air conditioner and air conditioner

Abstract

The application relates to the technical field of air conditioners, and provides an air conditioner control method and an air conditioner. The air conditioner control method comprises the following steps: in response to a starting signal, controlling the air conditioner to operate in a pre-starting mode; the pre-starting mode comprises the following steps: adjusting the opening degree of an electronic expansion valve to an initial opening degree, and acquiring the real-time exhaust temperature of a compressor; gradually adjusting the opening degree of the electronic expansion valve from the initial opening degree to the automatic debugging opening degree of the air conditioner in stable operation according to the real-time exhaust temperature; wherein the initial opening degree is smaller than the fixed opening degree in the original starting stage of the air conditioner, and the difference between the fixed opening degree and the initial opening degree is a preset step number. When the air conditioner starts, the pre-starting mode is operated, the opening degree of the electronic expansion valve is adjusted to the initial opening degree, at this time, the resistance in the refrigerant circulation loop of the air conditioner is relatively large, the exhaust temperature of the compressor rises relatively fast, the heat exchange efficiency of the air conditioner can be rapidly improved, the indoor temperature can be improved in a relatively short time, and the use experience of a user is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner control method and an air conditioner. Background Technology

[0002] With urbanization and improved living standards, air conditioners have become indispensable household appliances. They regulate indoor temperature, fan speed, and humidity, enhancing comfort. However, in models equipped with electronic expansion valves, to ensure stable operation and reduce compressor startup load, the valve maintains a relatively large opening during startup. This results in a slower rise in compressor exhaust temperature and slower temperature regulation during startup, significantly impacting the user experience. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes a control method for an air conditioner. When the air conditioner starts, it first runs a pre-start mode, adjusting the opening of the electronic expansion valve to an initial opening. The initial opening is smaller than the fixed opening during the original start-up phase of the air conditioner, which can quickly increase the exhaust temperature of the compressor, improve the temperature regulation efficiency of the air conditioner, and enhance the user experience.

[0004] This invention also provides an air conditioner.

[0005] A control method for an air conditioner according to a first aspect embodiment of the present invention includes:

[0006] In response to the start signal, the air conditioner is controlled to operate in the pre-start mode;

[0007] The pre-startup mode includes:

[0008] Adjust the opening of the electronic expansion valve to the initial opening and obtain the real-time discharge temperature of the compressor;

[0009] The opening of the electronic expansion valve is gradually adjusted from the initial opening to the automatic adjustment opening when the air conditioner is running stably, based on the real-time exhaust temperature; wherein the initial opening is less than the fixed opening during the original start-up phase of the air conditioner, and the difference between the fixed opening and the initial opening is a preset number of steps.

[0010] According to an embodiment of the present invention, the step of gradually adjusting the opening of the electronic expansion valve from the initial opening to the automatic adjustment opening for stable operation of the air conditioner based on the real-time exhaust temperature specifically includes:

[0011] If the real-time exhaust temperature is determined to be greater than or equal to the first temperature threshold, then the opening of the electronic expansion valve is increased by one step based on the initial opening.

[0012] Continue monitoring the real-time exhaust temperature of the compressor. If the real-time exhaust temperature is determined to be greater than or equal to the second temperature threshold, then increase the opening of the electronic expansion valve by a second step on top of the first step until the automatic adjustment opening is reached.

[0013] According to one embodiment of the present invention, the step of gradually adjusting the opening of the electronic expansion valve from the initial opening to the automatic adjustment opening for stable operation of the air conditioner based on the real-time exhaust temperature further includes, prior to:

[0014] Obtain the reduced-frequency temperature of the air conditioner;

[0015] The first temperature threshold and the second temperature threshold are determined based on the frequency reduction temperature. The first temperature threshold, the second temperature threshold, and the frequency reduction temperature are set in a gradient and increase sequentially.

[0016] According to an embodiment of the present invention, the step of determining the first temperature threshold and the second temperature threshold based on the frequency reduction temperature further includes:

[0017] The number of the first step is determined based on the first temperature threshold, and the number of the second step is determined based on the second temperature threshold; wherein the first temperature threshold and the number of the first step are positively correlated.

[0018] According to one embodiment of the present invention, the ratio of the number of the first step to the number of the second step is between one-half and one-third.

[0019] According to one embodiment of the present invention, the ratio of the first temperature threshold to the frequency reduction temperature is greater than or equal to 80%.

[0020] According to an embodiment of the present invention, the step of gradually adjusting the opening of the electronic expansion valve from the initial opening to the automatic adjustment opening for stable operation of the air conditioner based on the real-time exhaust temperature specifically includes:

[0021] Obtain the reduced-frequency temperature of the air conditioner;

[0022] The opening of the electronic expansion valve is adjusted from the initial opening to the automatic adjustment opening based on the temperature difference between the frequency reduction temperature and the real-time exhaust temperature. The opening of the electronic expansion valve has a continuous linear relationship with the temperature difference.

[0023] According to an embodiment of the present invention, the step of adjusting the opening of the electronic expansion valve from the initial opening to the automatically adjusted opening based on the temperature difference between the frequency reduction temperature and the real-time exhaust temperature specifically includes:

[0024] If the temperature difference is determined to be greater than or equal to a third temperature threshold, the opening of the electronic expansion valve is controlled to increase from the initial opening at a first rate.

[0025] Continue monitoring the temperature difference, and if it is determined that the temperature difference is adjusted to be less than the third temperature threshold, then control the opening of the electronic expansion valve to increase at a second rate, wherein the first rate is less than the second rate.

[0026] According to one embodiment of the present invention, the step of gradually adjusting the opening of the electronic expansion valve from the initial opening to the automatic adjustment opening at which the air conditioner is operating stably based on the real-time exhaust temperature further includes:

[0027] Obtain the duration of the air conditioner's pre-start mode;

[0028] If the duration is determined to be greater than or equal to the preset duration, the opening of the electronic expansion valve is adjusted according to the real-time exhaust temperature.

[0029] An air conditioner according to a second aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the control method for the air conditioner according to a first aspect of the present invention.

[0030] The above-described one or more technical solutions of this invention have at least one of the following technical effects:

[0031] According to an embodiment of the present invention, the control method for an air conditioner includes the following steps: responding to a start signal, controlling the air conditioner to operate in a pre-start mode. The pre-start mode includes: adjusting the opening of the electronic expansion valve to an initial opening and acquiring the real-time exhaust temperature of the compressor; gradually adjusting the opening of the electronic expansion valve from the initial opening to an automatically adjusted opening for stable operation of the air conditioner based on the real-time exhaust temperature; wherein the initial opening is less than the fixed opening during the original start-up phase of the air conditioner, and the difference between the fixed opening and the initial opening is a preset number of steps. When the air conditioner starts, it operates in the pre-start mode, adjusting the opening of the electronic expansion valve to the initial opening, which is less than the fixed opening during the original start-up phase of the air conditioner. At this time, the resistance in the refrigerant circulation loop of the air conditioner is relatively large, and the exhaust temperature of the compressor rises rapidly, which can quickly improve the heat exchange efficiency of the air conditioner and improve the indoor temperature in a short time, thus improving the user experience. In the pre-start mode, because the initial opening is small, the exhaust temperature changes rapidly, and the opening of the electronic expansion valve is gradually adjusted to the automatically adjusted opening for stable operation of the air conditioner based on the real-time exhaust temperature. On the one hand, it can smoothly transition the air conditioner from the pre-start stage to the stable operation stage. On the other hand, when the real-time exhaust temperature increases, the opening of the electronic expansion valve gradually increases, the change in real-time exhaust temperature decreases and tends to be gentle, avoiding damage to the compressor due to overload and improving the compressor's operating life. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is one of the flowcharts for the control method of an air conditioner provided in an embodiment of the present invention;

[0034] Figure 2 A second flowchart of the air conditioner control method provided in an embodiment of the present invention;

[0035] Figure 3 The third flowchart is a control method for an air conditioner provided in an embodiment of the present invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the invention clearer, the technical solutions of the invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0039] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] The air conditioner provided in this embodiment of the invention includes at least a refrigerant circulation loop formed by a compressor, an indoor heat exchanger, an electronic expansion valve, and an outdoor heat exchanger. The opening degree of the electronic expansion valve can be adjusted, thereby adjusting the flow resistance of the refrigerant in the refrigerant circulation loop, and thus adjusting the discharge temperature of the compressor. When the opening degree of the electronic expansion valve is small, the discharge pressure of the compressor is large, so the discharge temperature rises; when the opening degree of the electronic expansion valve is small, the discharge pressure of the compressor is small, and the discharge temperature drops or rises more slowly. During operation, the opening degree of the electronic expansion valve can be adjusted according to the real-time discharge temperature, which helps to regulate the heat exchange efficiency of the air conditioner and can also prevent excessively high discharge temperatures from causing excessive compressor load.

[0042] Please refer to the control method for an air conditioner provided in the first aspect embodiment of the present invention. Figures 1 to 3 The process includes the following steps: In response to a start signal, controlling the air conditioner to operate in a pre-start mode, which includes:

[0043] S100: Adjust the opening of the electronic expansion valve to the initial opening and obtain the real-time discharge temperature of the compressor.

[0044] S200: The opening of the electronic expansion valve is gradually adjusted from the initial opening to the automatic adjustment opening when the air conditioner is running stably, based on the real-time exhaust temperature; wherein, the initial opening is less than the fixed opening during the original start-up phase of the air conditioner, and the difference between the fixed opening and the initial opening is a preset number of steps.

[0045] If the air conditioner operates at a fixed setting during startup, the compressor load can be reduced, preventing it from alarming or shutting down due to excessive load and facilitating a smooth start-up. However, the compressor's exhaust temperature rises more slowly during startup, resulting in slower temperature adjustment and significantly impacting the user experience.

[0046] The air conditioner control method provided in this embodiment of the invention does not adjust the opening of the electronic expansion valve to a fixed opening according to the original startup stage after responding to the start signal. Instead, it runs a pre-start mode after startup. The pre-start mode includes at least steps S100 and S200.

[0047] In step S100, the opening of the electronic expansion valve is adjusted to an initial opening, which is less than the fixed opening during the original startup phase of the air conditioner. The difference between the fixed opening and the initial opening is a preset opening. For example, to ensure smooth compressor startup, the fixed opening of the electronic expansion valve is set to 300 steps, while in this embodiment, the initial opening is set to 100 steps, and the preset opening step count is 200 steps. When the opening of the electronic expansion valve is set to the initial opening, the compressor's discharge pressure is high, and the discharge temperature rises rapidly. At this time, the real-time discharge temperature of the compressor is obtained by a temperature detection element located at the compressor discharge port, and the opening of the electronic expansion valve is adaptively adjusted based on the real-time discharge temperature.

[0048] In step S200, when the air conditioner starts, it operates in pre-start mode, adjusting the opening of the electronic expansion valve to its initial opening, which is smaller than the fixed opening during the original start-up phase. At this time, the pressure in the refrigerant circulation loop is higher, and the compressor's exhaust temperature rises rapidly, quickly improving the air conditioner's heat exchange efficiency and improving the indoor temperature in a shorter time, thus enhancing the user experience. In pre-start mode, due to the smaller initial opening, the exhaust temperature changes rapidly. Based on the real-time exhaust temperature, the opening of the electronic expansion valve is gradually adjusted to the automatically adjusted opening for stable operation. This allows the air conditioner to smoothly transition from the pre-start phase to the stable operation phase. Furthermore, as the real-time exhaust temperature increases, the opening of the electronic expansion valve gradually increases, reducing the amplitude of real-time exhaust temperature changes and making them more gradual. This prevents the compressor from being damaged due to overload and extends its service life.

[0049] It should be noted that, in the embodiments of the present invention, gradually adjusting the opening degree of the air conditioner means, in the initial stage of the pre-start mode, maintaining the opening degree of the electronic expansion valve within a small range as much as possible, thereby increasing the temperature rise of the real-time exhaust temperature. The gradual adjustment process includes continuous linear adjustment or continuous gradient adjustment, etc.

[0050] According to one embodiment of the present invention, the step of automatically adjusting the opening of the electronic expansion valve from its initial opening to the automatically adjusted opening for stable operation of the air conditioner based on the real-time exhaust temperature specifically includes:

[0051] S210. If the real-time exhaust temperature is determined to be greater than or equal to the first temperature threshold, the opening of the electronic expansion valve is increased by the first step number based on the initial opening.

[0052] S220. Continue to monitor the real-time exhaust temperature of the compressor. If the real-time exhaust temperature is greater than or equal to the second temperature threshold, increase the opening of the electronic expansion valve by the second step on the basis of increasing the first step number until the opening is automatically adjusted.

[0053] In steps S210 and S220, the process of gradually adjusting the opening of the electronic expansion valve from its initial opening to the automatically adjusted opening for stable operation of the air conditioner based on the real-time exhaust temperature is divided into two stages. In step S210, the opening of the electronic expansion valve is initially maintained at the initial opening, for example, 100 steps. This initial opening can be adjusted according to different types / specifications of air conditioners. At this time, the real-time exhaust temperature of the compressor rises rapidly, and can quickly reach the first temperature threshold, for example, 85 degrees Celsius. After the real-time exhaust temperature reaches the first temperature threshold, the opening of the electronic expansion valve needs to be adjusted promptly by increasing the number of steps by one step from the initial opening, for example, 50 steps. At this time, the opening of the electronic expansion valve increases, and the rate of increase in real-time exhaust temperature decreases, avoiding excessively high real-time exhaust temperature during the start-up phase and increasing the compressor's start-up load. It should be noted that after increasing the number of steps, the real-time exhaust temperature is still lower than the air conditioner's throttling temperature.

[0054] In step S220, the real-time exhaust temperature of the compressor continues to be monitored. When the real-time exhaust temperature is greater than or equal to the second temperature threshold, which is very close to the frequency reduction temperature, it is necessary to quickly reduce the rate and magnitude of the increase in real-time exhaust temperature to bring it closer to the exhaust temperature during stable operation. At this time, the opening of the electronic expansion valve is increased by a second number of steps beyond the initial opening. The second number of steps is greater than the first number, meaning that after increasing the first number, the real-time exhaust temperature still rises slowly, but after increasing the second number, the real-time exhaust temperature tends to stabilize. For example, if the first number is 50 steps, the second number is 150 steps. The automatic adjustment opening degree refers to the opening degree during stable operation of the air conditioner, for example, between 250 and 300 steps. At this time, the opening degree of the electronic expansion valve is automatically adjusted according to the real-time exhaust temperature, realizing the transition of the air conditioner from the pre-start stage to the stable operation stage.

[0055] According to one embodiment of the present invention, the step of automatically adjusting the opening of the electronic expansion valve from its initial opening to the automatically adjusted opening for stable operation of the air conditioner based on the real-time exhaust temperature further includes, prior to:

[0056] S201. Obtain the reduced-frequency temperature of the air conditioner.

[0057] S202. Determine the first temperature threshold and the second temperature threshold based on the frequency reduction temperature. The first temperature threshold, the second temperature threshold, and the frequency reduction temperature are set in a gradient and increase sequentially.

[0058] In step S201, the control parameters of the air conditioner are read to obtain the air conditioner's frequency reduction temperature. When the exhaust temperature reaches the frequency reduction temperature, the compressor frequency needs to be reduced or the opening of the electronic expansion valve needs to be increased to prevent the compressor from operating under high load for a long time, thus extending the compressor's service life. Maintaining the exhaust temperature below the frequency reduction temperature allows the air conditioner to operate stably for a long time.

[0059] In step S202, after determining the frequency reduction temperature, a first temperature threshold and a second temperature threshold are determined based on the frequency reduction temperature. If the first temperature threshold is set too low, the opening of the electronic expansion valve will be adjusted too early, resulting in an unsatisfactory effect in rapidly increasing the real-time exhaust temperature. Therefore, the temperature difference between the first temperature threshold and the frequency reduction temperature should not be too large, allowing the compressor's real-time exhaust temperature to rise to or near the frequency reduction temperature at a relatively high rate. The first temperature threshold mainly considers the heating efficiency of the real-time exhaust temperature, while the second temperature threshold mainly considers how the real-time exhaust temperature smoothly transitions to a stable state, ensuring that the real-time exhaust temperature does not exceed the frequency reduction temperature and avoiding additional resistance to the compressor's start-up.

[0060] As can be seen from the above, the closer the first temperature threshold is to the frequency reduction temperature, the higher the real-time exhaust temperature rise efficiency. In some cases, the ratio of the first temperature threshold to the frequency reduction temperature is greater than or equal to 80%.

[0061] According to an embodiment of the present invention, the step of determining the first temperature threshold and the second temperature threshold based on the frequency reduction temperature further includes:

[0062] S203. Determine the number of the first step based on the first temperature threshold, and determine the number of the second step based on the second temperature threshold; wherein the first temperature threshold and the number of the first step are positively correlated.

[0063] Understandably, after the first temperature threshold is determined, the difference between the first temperature threshold and the frequency reduction temperature is also determined. At this point, it is necessary to control the real-time exhaust temperature to transition towards the second temperature threshold. Therefore, based on the difference between the first temperature threshold and the frequency reduction temperature, and given that the frequency reduction temperature is determined, the number of steps in the first step can be determined based on the first temperature threshold. Simultaneously, when the second temperature threshold is determined, it is necessary to quickly stabilize the real-time exhaust temperature from the second temperature threshold to the frequency reduction temperature or below. At this point, the number of steps in the second step can be determined based on the difference between the second temperature threshold and the frequency reduction temperature. Given that the frequency reduction temperature is determined, the number of steps in the second step can be directly determined based on the second temperature threshold.

[0064] It should be noted that the larger the first temperature threshold, the smaller the difference between the first temperature threshold and the frequency reduction temperature. In subsequent adjustments, the rise in real-time exhaust temperature needs to be reduced more quickly, so the number of first steps also increases accordingly. That is, the first temperature threshold and the number of first steps are positively correlated.

[0065] According to one embodiment of the present invention, the ratio of the number of steps in the first step to the number of steps in the second step is between one-half and one-third. For example, the number of steps in the first step is 50 and the number of steps in the second step is 150.

[0066] According to one embodiment of the present invention, the step of automatically adjusting the opening of the electronic expansion valve from its initial opening to the automatically adjusted opening for stable operation of the air conditioner based on the real-time exhaust temperature specifically includes:

[0067] S250: Obtain the reduced-frequency temperature of the air conditioner.

[0068] S260. Based on the temperature difference between the frequency reduction temperature and the real-time exhaust temperature, the opening of the electronic expansion valve is adjusted from the initial opening to the automatic adjustment opening. The opening of the electronic expansion valve and the temperature difference have a continuous linear relationship.

[0069] In steps S250 and S260, the opening adjustment of the electronic expansion valve is a continuous linear adjustment, meaning the opening of the electronic expansion valve is continuously adjusted from the initial opening to the automatic adjustment opening. In the initial stage of this process, the opening of the electronic expansion valve is small, and the real-time exhaust temperature rises significantly, enabling the air conditioner to achieve efficient temperature regulation. As the opening of the electronic expansion valve gradually changes, the real-time exhaust temperature gradually transitions to the frequency reduction temperature and below.

[0070] It should be noted that the opening adjustment process of the electronic expansion valve can be uniform or variable, but it always maintains a continuous change.

[0071] According to one embodiment of the present invention, the step of adjusting the opening of the electronic expansion valve from the initial opening to the automatically adjusted opening based on the temperature difference between the frequency reduction temperature and the real-time exhaust temperature specifically includes:

[0072] S261. If the temperature difference is determined to be greater than or equal to the third temperature threshold, the opening of the electronic expansion valve is controlled to increase from the initial opening at a first rate.

[0073] S262. Continue to monitor the temperature difference. If the temperature difference is adjusted to be less than the third temperature threshold, control the opening of the electronic expansion valve to increase at a second rate, where the first rate is less than the second rate.

[0074] In this embodiment of the invention, the rate of adjustment of the opening degree is different as the opening degree of the electronic expansion valve gradually changes.

[0075] In step S261, when the temperature difference is greater than or equal to the third temperature threshold, it indicates that the difference between the real-time exhaust temperature and the frequency reduction temperature is large. At this time, the opening of the electronic expansion valve is gradually increased at the first rate to maintain the efficient increase of the real-time exhaust temperature.

[0076] In step S262, when the temperature difference is adjusted to be less than the third temperature threshold, it indicates that the exhaust temperature is close to the frequency reduction temperature. At this time, the opening of the electronic expansion valve is controlled to increase at a second rate, while the first rate is less than the second rate, to ensure that the real-time exhaust temperature smoothly transitions to the frequency reduction temperature and below.

[0077] Steps S261 and S262 ensure both the high efficiency of real-time exhaust temperature adjustment and the stability of real-time exhaust temperature changes.

[0078] According to one embodiment of the present invention, the step of automatically adjusting the opening of the electronic expansion valve from its initial opening to the automatically adjusted opening for stable operation of the air conditioner based on the real-time exhaust temperature further includes:

[0079] S300: Obtain the duration of the air conditioner's pre-start mode.

[0080] S310 If the duration is greater than or equal to the preset duration, the opening of the electronic expansion valve is adjusted according to the real-time exhaust temperature.

[0081] In steps S300 and S310, when the running time of the pre-start mode is greater than or equal to the preset time, the air conditioner needs to smoothly transition from the pre-start mode to the stable operation mode. At this time, the opening of the electronic expansion valve is adjusted according to the real-time exhaust temperature, and the air conditioner smoothly enters the stable operation stage.

[0082] In some embodiments, the preset duration is 6 minutes.

[0083] An air conditioner according to a second aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the control method for the air conditioner according to a first aspect of the present invention.

[0084] When the air conditioner starts, it first operates in pre-start mode, adjusting the electronic expansion valve to its initial opening, which is smaller than the fixed opening during the original startup phase. At this time, the pressure within the refrigerant circulation loop is higher, and the compressor's exhaust temperature rises rapidly, quickly improving the air conditioner's heat exchange efficiency and improving the indoor temperature in a shorter time, thus enhancing the user experience. In pre-start mode, due to the smaller initial opening and faster exhaust temperature changes, the electronic expansion valve opening is gradually adjusted to the automatically adjusted opening for stable operation based on the real-time exhaust temperature. This allows for a smooth transition from the pre-start phase to stable operation. Furthermore, as the real-time exhaust temperature increases, the electronic expansion valve opening gradually increases, reducing and smoothing out temperature fluctuations, preventing compressor damage due to overload and extending the compressor's lifespan.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method of an air conditioner, characterized by, Comprising: in response to a start signal, controlling the air conditioner to operate in a pre-start mode; the pre-start mode comprises: adjusting the opening degree of the electronic expansion valve to an initial opening degree, and obtaining the real-time discharge temperature of the compressor; gradually adjusting the opening degree of the electronic expansion valve from the initial opening degree to an automatic debugging opening degree when the air conditioner is stable according to the real-time discharge temperature; wherein the initial opening degree is smaller than the fixed opening degree in the original start stage of the air conditioner, and the difference between the fixed opening degree and the initial opening degree is a preset step number; the step of gradually adjusting the opening degree of the electronic expansion valve from the initial opening degree to the automatic debugging opening degree according to the real-time discharge temperature, specifically comprises: obtaining the frequency reduction temperature of the air conditioner; adjusting the opening degree of the electronic expansion valve from the initial opening degree to the automatic debugging opening degree according to the temperature difference between the frequency reduction temperature and the real-time discharge temperature, and the opening degree of the electronic expansion valve and the temperature difference are in a continuous linear relationship; The opening degree of the electronic expansion valve is continuously adjusted from the initial opening degree to the automatic debugging opening degree. During the gradual change of the opening degree of the electronic expansion valve, the real-time discharge temperature gradually transitions to the frequency reduction temperature and below; The opening degree adjustment process of the electronic expansion valve is uniform or variable, but always maintains a continuously changing state.

2. The control method of the air conditioner according to claim 1, characterized by, the step of gradually adjusting the opening degree of the electronic expansion valve from the initial opening degree to the automatic debugging opening degree according to the real-time discharge temperature, specifically comprises: determining that the real-time discharge temperature is greater than or equal to a first temperature threshold, and then increasing the opening degree of the electronic expansion valve by a first step number based on the initial opening degree; continue to monitor the real-time discharge temperature of the compressor, and determine that the real-time discharge temperature is greater than or equal to a second temperature threshold, then continue to increase the opening degree of the electronic expansion valve by a second step number based on the first step number to the automatic debugging opening degree.

3. The control method of the air conditioner according to claim 2, characterized by, the step of gradually adjusting the opening degree of the electronic expansion valve from the initial opening degree to the automatic debugging opening degree according to the real-time discharge temperature, further comprises: obtaining the frequency reduction temperature of the air conditioner; determining the first temperature threshold and the second temperature threshold according to the frequency reduction temperature, the first temperature threshold, the second temperature threshold and the frequency reduction temperature are gradiently set, and sequentially increase.

4. The control method of the air conditioner according to claim 3, characterized by, the step of determining the first temperature threshold and the second temperature threshold according to the frequency reduction temperature, further comprises: determining the first step number according to the first temperature threshold, and determining the second step number according to the second temperature threshold; wherein the first temperature threshold and the first step number are positively correlated.

5. The control method of the air conditioner according to claim 2, wherein The ratio of the first step number to the second step number is between one-half and one-third.

6. The control method of the air conditioner according to claim 3, wherein The ratio of the first temperature threshold to the frequency reduction temperature is greater than or equal to 80%.

7. The control method of the air conditioner according to claim 1, wherein the step of adjusting the opening degree of the electronic expansion valve from the initial opening degree to the automatic debugging opening degree according to the temperature difference between the frequency reduction temperature and the real-time discharge temperature, specifically comprises: determining that the temperature difference is greater than or equal to a third temperature threshold, then controlling the opening degree of the electronic expansion valve to increase from the initial opening degree at a first rate; Continuously monitor the temperature difference, determine that the temperature difference is adjusted to be less than the third temperature threshold, and then control the opening degree of the electronic expansion valve to be increased at a second rate, the first rate being less than the second rate.

8. The control method of an air conditioner according to any one of claims 1 to 7, characterized by, The step of gradually adjusting the opening degree of the electronic expansion valve from the initial opening degree to an automatic debugging opening degree when the air conditioner is in stable operation according to the real-time exhaust temperature further comprises: acquiring a length of time during which the air conditioner is in a pre-start mode; determining that the length of time is greater than or equal to a preset length of time, and then adjusting the opening degree of the electronic expansion valve according to the real-time exhaust temperature.

9. An air conditioner comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor implements the steps of the control method of the air conditioner according to any one of claims 1 to 8 when executing the program. The processor implements the steps of the control method of the air conditioner according to any one of claims 1 to 8 when executing the program.

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