Operation control method and device of air conditioner and storage medium

Abstract

The invention discloses an operation control method and device of an air conditioner and a computer readable storage medium. The air conditioner comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger and an electronic expansion valve arranged on a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger. The method comprises the steps that when the operation frequency of the compressor is lower than a first preset frequency, the whole machine operation current of the air conditioner is obtained; and when the complete machine operation current within the first preset duration meets the preset fluctuation condition, it is judged that the rotation fluctuation abnormal condition of the compressor occurs. Whether the compressor has the abnormal rotation fluctuation condition or not can be detected by judging the running current of the whole machine on the software level, so that adjustment measures can be taken in time, and the use comfort of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular, to an operation control method, an operation control device and a computer-readable storage medium for an air conditioner. Background Art

[0002] Currently, rotary compressors are usually used in variable-frequency air conditioners with a refrigerating capacity of less than 3 horsepower. Rotary compressors have good efficiency in most operating regions. The rotary compressor drives an eccentric rotor through speed, continuously compresses low-pressure gas into high-pressure gas. The sliding vane inside the compressor is tightly linked with the rotor, separating the high-pressure and low-pressure parts. Through the pressure difference between high and low pressures, the sliding vane and the rotor can closely follow the movement.

[0003] However, when the compressor operates at low frequency and the indoor and outdoor loads are light, it is easy to have a situation where the high and low pressures do not differ much. At this time, the sliding vane and the rotor cannot closely follow, but instead there are intermittent departures, resulting in a rattling sound of the sliding vane hitting the rotor, which affects the user's comfort. Currently, the prior art generally avoids this situation from the hardware aspect, and there is no relevant detection technology or adjustment measures in terms of software control. Summary of the Invention

[0004] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide an operation control method, an operation control device and a computer-readable storage medium for an air conditioner, which can detect whether the compressor has abnormal rotational fluctuations by judging the operating current of the whole machine at the software level, so as to take adjustment measures in time and improve the user's comfort.

[0005] In a first aspect, an embodiment of the present invention provides an operation control method for an air conditioner. The air conditioner includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an electronic expansion valve disposed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger. The method includes but is not limited to the following steps:

[0006] When the operating frequency of the compressor is lower than a first preset frequency, obtain the operating current of the whole air conditioner;

[0007] When the operating current of the whole machine within a first preset duration meets a preset fluctuation condition, it is determined that the compressor has an abnormal rotational fluctuation situation.

[0008] The operation control method of the air conditioner provided by the embodiment of the present invention has at least the following beneficial effects: Since the intermittent separation and contact following between the sliding vane and the rotor occur when the compressor operates at a low frequency, it will cause the load of the air conditioner to fluctuate periodically, and then cause the operating current of the whole machine to fluctuate periodically. Therefore, when it is detected that the operating frequency of the compressor is lower than the first preset frequency, the operating current of the whole machine of the air conditioner is obtained, and whether the compressor has abnormal rotational fluctuations is judged according to the operating current of the whole machine within the first preset duration. It is possible to detect whether the compressor has abnormal rotational fluctuations by judging the operating current of the whole machine at the software level, so as to take adjustment measures in time and improve the user's comfort.

[0009] According to the operation control method of the air conditioner provided by some embodiments of the present invention, when the operating current of the whole machine within the first preset duration meets the preset fluctuation condition, at least one of the external fan speed, the opening degree of the electronic expansion valve, and the operating frequency of the compressor is adjusted to increase the high-low pressure difference of the compressor.

[0010] When it is detected that the operating frequency of the compressor is lower than the first preset frequency, the operating current of the whole machine of the air conditioner is obtained, and it is judged whether the high-low pressure difference of the compressor needs to be adjusted according to the operating current of the whole machine within the first preset duration. Since the intermittent separation and contact following between the sliding vane and the rotor occur when the compressor operates at a low frequency, it will cause the load of the air conditioner to fluctuate periodically, and then cause the operating current of the whole machine to fluctuate periodically. Therefore, by judging whether the operating current of the whole machine within a period of time meets the preset fluctuation condition, it can be judged whether the sliding vane and the rotor of the compressor have intermittent separation and contact following. When the preset fluctuation condition is met, at least one of the external fan speed, the opening degree of the electronic expansion valve, and the operating frequency of the compressor is adjusted to increase the high-low pressure difference of the compressor, which can prevent the sliding vane and the rotor of the compressor from separating from each other, thereby avoiding the noise of the sliding vane hitting the rotor when the air conditioner operates at a low frequency and improving the user's comfort.

[0011] According to the operation control method of the air conditioner provided by some embodiments of the present invention, the preset fluctuation condition is that the difference between the maximum value and the minimum value of the operating current of the whole machine within the first preset duration is greater than the product of the average value of the operating current of the whole machine and the first coefficient, and the first coefficient is greater than 1 and less than 1.1.

[0012] According to the operation control method of the air conditioner provided by some embodiments of the present invention, the preset fluctuation condition is that the difference between the maximum value and the average value of the operating current of the whole machine within the first preset duration is greater than the product of the average value and the second coefficient, and the second coefficient is greater than 1 and less than 1.1.

[0013] The operation control method of an air conditioner provided by some embodiments of the present invention, the preset fluctuation condition is: the difference between the average value and the minimum value of the whole machine operating current within a first preset time period is greater than the product of the average value and a second coefficient, and the second coefficient is greater than 1 and less than 1.1.

[0014] The operation control method of an air conditioner provided by some embodiments of the present invention, before adjusting at least one of the external fan speed, the opening degree of the electronic expansion valve, and the operating frequency of the compressor, further includes:

[0015] Controlling the opening degree of the electronic expansion valve to remain unchanged, obtaining the whole machine operating current within a first preset time period again, and determining whether the preset fluctuation condition is satisfied again.

[0016] The operation control method of an air conditioner provided by some embodiments of the present invention, adjusting at least one of the external fan speed, the opening degree of the electronic expansion valve, and the operating frequency of the compressor includes:

[0017] Reducing the external fan speed by a first preset value, and reducing the opening degree of the electronic expansion valve by a second preset value;

[0018] After an interval of a second preset time period, obtaining the whole machine operating current within a first preset time period again, and determining whether the preset fluctuation condition is satisfied again;

[0019] When the reduction times of the external fan speed and the opening degree of the electronic expansion valve reach a first preset number of times, and the whole machine operating current obtained again within the first preset time period still satisfies the preset fluctuation condition, increasing the operating frequency of the compressor by a third preset value.

[0020] The operation control method of an air conditioner provided by some embodiments of the present invention, after increasing the operating frequency of the compressor by a third preset value, further includes:

[0021] After an interval of a third preset time period, obtaining the whole machine operating current within a first preset time period again, and determining whether the preset fluctuation condition is satisfied again;

[0022] When the preset fluctuation condition is satisfied again, increasing the operating frequency of the compressor by the third preset value again until the increase times of the operating frequency of the compressor reach a second preset number of times.

[0023] The operation control method of an air conditioner provided by some embodiments of the present invention, adjusting at least one of the external fan speed, the opening degree of the electronic expansion valve, and the operating frequency of the compressor includes:

[0024] Reducing the external fan speed by a first preset value;

[0025] Alternatively, decrease the opening degree of the electronic expansion valve by a second preset value;

[0026] Alternatively, increase the operating frequency of the compressor by a third preset value.

[0027] According to the operation control method of an air conditioner provided by some embodiments of the present invention, the value range of the first preset value is 10 to 50 r / min; the second preset value is in the value range of 1 to 30 steps; the value range of the third preset value is 1 to 5 Hz.

[0028] In a second aspect, an embodiment of the present invention provides an operation control device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor executes the program to implement the operation control method of the air conditioner as described in the first aspect embodiment above.

[0029] In a third aspect, an embodiment of the present invention provides an air conditioner, including the operation control device as described in the second aspect embodiment above.

[0030] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer-executable instructions for causing a computer to execute the operation control method of the air conditioner as described in the first aspect embodiment above.

[0031] Other features and advantages of the present invention will be described in the subsequent description, and, in part, will be obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the description. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation to the technical solutions of the present invention.

[0033] The present invention will be further described below in conjunction with the drawings and embodiments;

[0034] Figure 1 is a schematic structural diagram of an air conditioner provided by an embodiment of the present invention;

[0035] Figure 2 is a flowchart of an operation control method of an air conditioner provided by Embodiment 1 of the present invention;

[0036] Figure 3 is a flowchart of an operation control method of an air conditioner provided by Embodiment 2 of the present invention;

[0037] Figure 4It is a flowchart of the operation control method of the air conditioner provided in Embodiment 3 of the present invention;

[0038] Figure 5 It is a schematic structural diagram of the operation control device provided in the embodiment of the present invention. Detailed implementation manners

[0039] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

[0040] In the description of the embodiments of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two, "greater than", "less than", "exceeding", etc. are understood as not including the number itself, "above", "below", "within", etc. are understood as including the number itself, "at least one" means one or more, and "at least one of the following" and its similar expressions refer to any combination of these items, including any combination of single items or plural items. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0041] It should be noted that words such as "set", "installed", "connected", etc. in the embodiments of the present invention should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connected" can be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium.

[0042] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Variable-frequency air conditioners with a refrigerating capacity of less than 3 horsepower usually use rotary compressors, which have good efficiency in most operating regions. The rotary compressor drives an eccentric rotor through speed, continuously compresses low-pressure gas into high-pressure gas, and the sliding vane inside the compressor is closely linked with the rotor, separating the high-pressure and low-pressure parts. Through the pressure difference between high and low pressures, the sliding vane and the rotor can closely follow the movement. However, when the compressor operates at low frequency and the indoor and outdoor loads are light, it is easy to have a situation where the high and low pressures do not differ much. At this time, the sliding vane and the rotor cannot closely follow, but there is an intermittent separation, resulting in a rattling sound of the sliding vane hitting the rotor, which affects the user's comfort. Currently, the existing technology generally avoids this situation from the hardware aspect, and there is no relevant detection technology or adjustment measures in terms of software control.

[0044] Based on this, the embodiments of the present invention provide an operating control method, an operating control device, and a computer-readable storage medium for an air conditioner, which can detect whether the compressor has abnormal rotational fluctuations by judging the operating current of the whole machine at the software level, so as to take adjustment measures in time and improve the user's comfort.

[0045] The following further elaborates on the embodiments of the present invention in conjunction with the accompanying drawings.

[0046] Refer to Figure 1 , Figure 1 which is a schematic structural diagram of an air conditioner provided by an embodiment of the present invention. The air conditioner includes a compressor 110, a four-way valve 120 connected to the compressor 110, an indoor heat exchanger 130 and an outdoor heat exchanger 140 connected to the four-way valve 120, and an electronic expansion valve 150 provided on the refrigerant pipeline between the indoor heat exchanger 130 and the outdoor heat exchanger 140. It can be understood that the operating control methods introduced in the following various embodiments of the present invention are not limited to being applied to the Figure 1 shown air conditioner, and can also be applied to single-cooling air conditioners or single-heating air conditioners.

[0047] Figure 2 which is a flowchart of an operating control method for an air conditioner provided by a first aspect embodiment of the present invention. Refer to Figure 2 , the operating control method includes but is not limited to steps S210 to S220:

[0048] Step S210: When the operating frequency of the compressor 110 is lower than the first preset frequency, obtain the operating current of the whole air conditioner.

[0049] It should be noted that when the compressor 110 operates at a low frequency and the sliding vane intermittently leaves and contacts the rotor, it will cause periodic fluctuations in the load of the air conditioner, and further cause periodic fluctuations in the operating current of the whole machine. Therefore, by judging whether the operating current of the whole machine within a certain period of time meets the preset fluctuation condition, it can be judged whether the sliding vane and the rotor of the compressor 110 intermittently leave and contact and follow each other.

[0050] Step S220: When the operating current of the whole machine within the first preset time period meets the preset fluctuation condition, it is determined that the compressor 110 has an abnormal rotation fluctuation situation.

[0051] According to the operation control method of the air conditioner provided by the embodiment of the present invention, when it is detected that the operating frequency of the compressor is lower than the first preset frequency, the operating current of the whole machine of the air conditioner is obtained, and whether the compressor has an abnormal rotation fluctuation situation is judged according to the operating current of the whole machine within the first preset time period. It is possible to detect whether the compressor has an abnormal rotation fluctuation situation by judging the operating current of the whole machine at the software level, so as to take adjustment measures in time and improve the user's comfort.

[0052] According to the operation control method of the air conditioner provided by some embodiments of the present invention, when the operating current of the whole machine within the first preset time period meets the preset fluctuation condition, at least one of the external fan speed, the opening degree of the electronic expansion valve 150, and the operating frequency of the compressor 110 is adjusted to increase the high and low pressure difference of the compressor 110.

[0053] According to the operation control method of the air conditioner provided by the embodiment of the present invention, when it is detected that the operating frequency of the compressor 110 is lower than the first preset frequency, the operating current of the whole machine of the air conditioner is obtained, and it is judged whether it is necessary to adjust the high and low pressure difference of the compressor 110 according to the operating current of the whole machine within the first preset time period. When the operating current of the whole machine within the first preset time period meets the preset fluctuation condition, at least one of the external fan speed, the opening degree of the electronic expansion valve 150, and the operating frequency of the compressor 110 is adjusted, so as to increase the high and low pressure difference of the compressor 110, and adjustment measures can be taken in time to prevent the sliding vane and the rotor of the compressor 110 from separating from each other, thereby avoiding the noise of the sliding vane hitting the rotor when the air conditioner operates at a low frequency, and improving the user's comfort.

[0054] In the operation control method of the air conditioner provided by an embodiment of the present invention, the preset fluctuation condition is: the difference between the maximum value and the minimum value of the operating current of the whole machine within the first preset time period is greater than the product of the average value of the operating current of the whole machine and the first coefficient, and the first coefficient is greater than 1 and less than 1.1.

[0055] In this embodiment, the first preset duration can be exemplarily set to 10 minutes, and the first coefficient can be exemplarily taken as 104%. Denote the maximum value of the whole-machine operating current within the first preset duration as IaMax, the minimum value of the whole-machine operating current within the first preset duration as IaMin, and the average value of the whole-machine operating current within the first preset duration as IaAvg. Then the preset fluctuation condition can be expressed by the following formula: IaMax - IaMin > IaAvg * 104%. When the whole-machine operating current within 10 minutes satisfies this condition, it can indicate that the fluctuation of the whole-machine operating current of the air conditioner is relatively large during this period, that is, it can reflect that the load of the air conditioner is unstable. Combining with the precondition that the operating frequency of the compressor 110 is lower than the first preset frequency, it can be determined that it is caused by the relatively small high-low pressure difference of the compressor 110, and the sliding vane and the rotor cannot closely follow, resulting in intermittent separation. Therefore, corresponding adjustments are needed to increase the high-low pressure difference of the compressor 110.

[0056] In the operating control method of the air conditioner provided in another embodiment of the present invention, the preset fluctuation condition is: the difference between the maximum value and the average value of the whole-machine operating current within the first preset duration is greater than the product of the average value and the second coefficient, and the second coefficient is greater than 1 and less than 1.1.

[0057] Referring to the foregoing embodiment, the first preset duration can be exemplarily set to 10 minutes, and the second coefficient can be exemplarily taken as 102%. Denote the maximum value of the whole-machine operating current within the first preset duration as IaMax, and the average value of the whole-machine operating current within the first preset duration as IaAvg. Then the preset fluctuation condition in this embodiment can be expressed by the following formula: IaMax - IaAvg > IaAvg * 102%. Similarly, when the whole-machine operating current within 10 minutes satisfies this condition, it can indicate that the fluctuation of the whole-machine operating current of the air conditioner is relatively large during this period, that is, it can reflect that the load of the air conditioner is unstable. Combining with the precondition that the operating frequency of the compressor 110 is lower than the first preset frequency, it can be determined that it is caused by the relatively small high-low pressure difference of the compressor 110, and the sliding vane and the rotor cannot closely follow, resulting in intermittent separation. Therefore, corresponding adjustments are needed to increase the high-low pressure difference of the compressor 110.

[0058] In the operating control method of the air conditioner provided in yet another embodiment of the present invention, the preset fluctuation condition is: the difference between the average value and the minimum value of the whole-machine operating current within the first preset duration is greater than the product of the average value and the second coefficient, and the second coefficient is greater than 1 and less than 1.1.

[0059] Referring to the foregoing embodiments, the first preset duration may be exemplarily set to 10 minutes, and the second coefficient may be exemplarily taken as 102%. Denote the minimum value of the overall machine operating current within the first preset duration as IaMin, and the average value of the overall machine operating current within the first preset duration as IaAvg. The preset fluctuation condition in this embodiment can be expressed by the following formula: IaAvg - IaMin > IaAvg * 102%. Similarly, when the overall machine operating current within 10 minutes satisfies this condition, it can indicate that the fluctuation of the overall machine operating current of the air conditioner is relatively large during this period, that is, it can reflect that the load of the air conditioner is unstable. Combining the premise that the operating frequency of the compressor 110 is lower than the first preset frequency, it can be determined that it is caused by the relatively small high-low pressure difference of the compressor 110, and the sliding vane and the rotor cannot closely follow, resulting in intermittent separation. Therefore, corresponding adjustments are required to increase the high-low pressure difference of the compressor 110.

[0060] In the operation control method of the air conditioner provided in some embodiments of the present invention, before performing the operation of adjusting at least one of the external fan speed, the opening degree of the electronic expansion valve 150, and the operating frequency of the compressor 110, it further includes:

[0061] Control the opening degree of the electronic expansion valve 150 to remain unchanged, and obtain the overall machine operating current within the first preset duration again and determine whether it satisfies the preset fluctuation condition again.

[0062] It can be understood that when the preset fluctuation condition is first satisfied, controlling the opening degree of the electronic expansion valve 150 to remain unchanged, and obtaining the overall machine operating current again and making a second judgment can avoid misjudgment caused by the change in the opening degree of the electronic expansion valve 150 during the first judgment, which is beneficial to increasing the accuracy of the adjustment measure for increasing the high-low pressure difference of the compressor 110.

[0063] Referring to Figure 3 , in the operation control method of the air conditioner provided in another embodiment of the present invention, adjusting at least one of the external fan speed, the opening degree of the electronic expansion valve 150, and the operating frequency of the compressor 110 includes, but is not limited to, steps S310 to S330:

[0064] Step S310: Reduce the external fan speed by a first preset value and reduce the opening degree of the electronic expansion valve 150 by a second preset value;

[0065] Step S320: After an interval of a second preset duration, obtain the overall machine operating current within the first preset duration again and determine whether it satisfies the preset fluctuation condition again;

[0066] Step S330: When the reduction times of the external fan speed and the opening degree of the electronic expansion valve 150 reach the first preset number of times, and the total machine operating current within the re-acquired first preset time still meets the preset fluctuation condition, increase the operating frequency of the compressor 110 by a third preset value.

[0067] In this embodiment, by first taking measures to adjust the external fan speed and the opening degree of the electronic expansion valve 150, and after one adjustment, judging again whether the preset fluctuation condition is met at an interval of a second preset time until the adjustment times of the external fan speed and the opening degree of the electronic expansion valve 150 reach the first preset number of times, and then taking measures to adjust the operating frequency of the compressor 110, it is possible to avoid directly reducing the outlet air temperature when the user does not have a high cooling demand or avoid directly increasing the outlet air temperature when the user does not have a high heating demand, and also avoid wasting energy; first taking adjustment measures with less impact on the indoor temperature, while taking into account the user's temperature requirements, avoiding the noise of the sliding vane hitting the rotor in the air conditioner, and the control is more refined, and the user experience is better.

[0068] Refer to Figure 3 , in the operation control method of the air conditioner provided in another embodiment of the present invention, after increasing the operating frequency of the compressor 110 by a third preset value in step S330, it further includes step S340 and step S350:

[0069] Step S340: After an interval of a third preset time, acquire the total machine operating current within the first preset time again, and judge whether it meets the preset fluctuation condition again;

[0070] Step S350: When it meets the preset fluctuation condition again, increase the operating frequency of the compressor 110 by a third preset value again until the increase times of the operating frequency of the compressor 110 reach the second preset number of times.

[0071] In this embodiment, the value of the third preset value can be set to be relatively small, and then multiple interval adjustments are made to avoid a large one-time adjustment of the operating frequency of the compressor 110, which may cause a large impact on the indoor temperature.

[0072] In the operation control method of the air conditioner provided in another embodiment of the present invention, when the total machine operating current within the first preset time meets the preset fluctuation condition, reduce the external fan speed by a first preset value.

[0073] Reducing the external fan speed by a first preset value, for example, can be reducing the external fan speed by 20 r / min at the current speed. It can be understood that after reducing the external fan speed, the heat exchange effect of the outdoor heat exchanger 140 will decrease, so that the refrigerant pressure at the front end of the outdoor heat exchanger 140 is higher and the refrigerant pressure at the rear end is lower, thereby increasing the high and low pressure difference of the compressor 110.

[0074] In the operation control method of the air conditioner provided by another embodiment of the present invention, when the overall operating current within the first preset duration meets the preset fluctuation condition, the opening degree of the electronic expansion valve 150 is reduced by a second preset value.

[0075] Reducing the opening degree of the electronic expansion valve 150 by a second preset value, for example, the opening degree of the electronic expansion valve 150 can be reduced by 15 steps from the current opening degree. It can be understood that after reducing the opening degree of the electronic expansion valve 150, the refrigerant flow rate passing through the electronic expansion valve 150 decreases, and the refrigerant pressure at the front end of the electronic expansion valve 150 can also be made higher and the refrigerant pressure at the rear end lower, thereby increasing the high and low pressure difference of the compressor 110.

[0076] In the operation control method of the air conditioner provided by another embodiment of the present invention, when the overall operating current within the first preset duration meets the preset fluctuation condition, the operating frequency of the compressor 110 is increased by a third preset value.

[0077] Increasing the operating frequency of the compressor 110 by a third preset value, for example, the operating frequency of the compressor 110 can be increased by 3 Hz from the current frequency. It can be understood that when the operating frequency of the compressor 110 increases, the rotor of the compressor 110 rotates faster, and the low-pressure gas is compressed into high-pressure gas more quickly, which can increase the high and low pressure difference of the compressor 110.

[0078] It can be understood that different from Figure 3 the hybrid measures taken, any one of the above three adjustment measures can play a role in increasing the high and low pressure difference of the compressor 110, thereby avoiding the separation between the sliding vane and the rotor of the compressor 110, and further avoiding the noise of the sliding vane hitting the rotor during the low-frequency operation of the air conditioner, improving the user's comfort.

[0079] According to the operation control method of the air conditioner provided by some embodiments of the present invention, the value range of the first preset value is 10 to 50 r / min; the value range of the second preset value is 1 to 30 steps; the value range of the third preset value is 1 to 5 Hz.

[0080] Next, in order to more clearly illustrate the operation control method of the air conditioner of the present invention, in combination with Figure 4 a detailed embodiment of the present application will be introduced comprehensively and in detail.

[0081] Referring to Figure 4 , the operation control method of the air conditioner includes the following steps:

[0082] Step S401: The air conditioner operates, continuously monitoring the operating frequency of the compressor; jump to step S402;

[0083] Step S402: Determine whether the operating frequency of the compressor is lower than the first preset frequency? If yes, jump to step S403; if not, jump to step S418;

[0084] Step S403: Continuously obtain the overall operating current of the air conditioner; jump to step S404;

[0085] Step S404: Determine whether the overall operating current within 10 minutes meets the preset fluctuation condition? If yes, jump to step S405; if not, jump to step S418; where the preset fluctuation condition is IaMax - IaMin > IaAvg * 104%, IaMax is the maximum value of the overall operating current within 10 minutes, IaMin is the minimum value of the overall operating current within 10 minutes, and IaAvg is the average value of the overall operating current within 10 minutes;

[0086] Step S405: Control the opening of the electronic expansion valve 150 to remain unchanged; jump to step S406;

[0087] Step S406: Obtain the overall operating current within 10 minutes again; jump to step S407;

[0088] Step S407: Determine again whether the overall operating current within 10 minutes meets the preset fluctuation condition? If yes, jump to step S408; if not, jump to step S418;

[0089] Step S408: Reduce the external fan speed by 20 r / min and reduce the opening of the electronic expansion valve 150 by 15 steps; jump to step S409;

[0090] Step S409: Increment the first adjustment count by 1; jump to step S410; where the initial value of the first adjustment count is 0;

[0091] Step S410: Determine whether the first adjustment count has reached 3 times? If yes, jump to step S412; if not, jump to step S411;

[0092] Step S411: Wait for 5 minutes; jump to step S406;

[0093] Step S412: Increase the operating frequency of the compressor 110 by 3 Hz; jump to step S413;

[0094] Step S413: Increment the second adjustment count by 1; jump to step S414; where the initial value of the second adjustment count is 0;

[0095] Step S414: Determine whether the second adjustment count has reached 5 times? If yes, jump to step S418; if not, jump to step S415;

[0096] Step S415: Wait for 5 minutes; then jump to step S403;

[0097] Step S416: Obtain the operating current of the whole machine within 10 minutes again; then jump to step S417;

[0098] Step S407: Determine again whether the operating current of the whole machine within 10 minutes meets the preset fluctuation condition? If yes, jump to step S412; if not, jump to step S418;

[0099] Step S418: End.

[0100] In the embodiment of the present invention, when it is detected that the operating frequency of the compressor 110 is lower than the first preset frequency, the operating current of the whole air conditioner is obtained, and it is determined whether to adjust the high and low pressure difference of the compressor 110 according to the operating current of the whole machine within the first preset duration. Since the intermittent separation and contact following of the sliding vane and the rotor during the low-frequency operation of the compressor 110 will cause periodic fluctuations in the load of the air conditioner, and further cause periodic fluctuations in the operating current of the whole machine. Therefore, by determining whether the operating current of the whole machine within a period of time meets the preset fluctuation condition, it can be determined whether the sliding vane and the rotor of the compressor 110 are intermittently separated and in contact following. When the preset fluctuation condition is met, at least one of the external fan speed, the opening degree of the electronic expansion valve 150, and the operating frequency of the compressor 110 is adjusted, so as to increase the high and low pressure difference of the compressor 110, which can prevent the sliding vane and the rotor of the compressor 110 from separating from each other, thereby avoiding the noise of the sliding vane hitting the rotor during the low-frequency operation of the air conditioner and improving the user's comfort.

[0101] Referring to Figure 5 , an embodiment of the second aspect of the present invention provides an operation control device 500, including a memory 510, a processor 520, and a computer program stored on the memory 510 and executable on the processor 520. The processor 520 executes the program to implement the operation control method of the air conditioner in the first aspect embodiment as above, for example, execute Figure 2 the method steps S210 to S220 in Figure 3 execute the method steps S310 to S350 in Figure 4 or execute the method steps S401 to S418 in

[0102] In addition, an embodiment of the third aspect of the present invention provides an air conditioner, including the operation control device 500 in the second aspect embodiment as above.

[0103] In addition, an embodiment of the fourth aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the operation control method of the air conditioner in the first aspect embodiment above, for example, to execute Figure 2 method steps S210 to S220 in Figure 3 method steps S310 to S350 in Figure 4 or method steps S401 to S418 in

[0104] Those of ordinary skill in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and their appropriate combinations. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium or a non-transitory medium and a communication medium or a transitory medium. As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technologies, CD-ROM, digital versatile disk (DVD), or other optical disk storage, magnetic cassette, tape, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium typically contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0105] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. An operating control method for an air conditioner, characterized in that, the air conditioner includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an electronic expansion valve disposed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the method includes: when the operating frequency of the compressor is lower than a first preset frequency, obtaining the overall operating current of the air conditioner; when the overall operating current within a first preset time period meets a preset fluctuation condition, it is determined that the compressor has an abnormal rotational fluctuation.

2. The operating control method according to claim 1, characterized in that, when the overall operating current within a first preset time period meets a preset fluctuation condition, adjusting at least one of the rotational speed of the outdoor fan, the opening degree of the electronic expansion valve, and the operating frequency of the compressor to increase the high and low pressure difference of the compressor.

3. The operating control method according to claim 1, characterized in that, the preset fluctuation condition is: the difference between the maximum value and the minimum value of the overall operating current within a first preset time period is greater than the product of the average value of the overall operating current and a first coefficient, and the first coefficient is greater than 1 and less than 1.

1.

4. The operating control method according to claim 1, characterized in that, the preset fluctuation condition is: the difference between the maximum value and the average value of the overall operating current within a first preset time period is greater than the product of the average value and a second coefficient, and the second coefficient is greater than 1 and less than 1.

1.

5. The operating control method according to claim 1, characterized in that, the preset fluctuation condition is: the difference between the average value and the minimum value of the overall operating current within a first preset time period is greater than the product of the average value and a second coefficient, and the second coefficient is greater than 1 and less than 1.

1.

6. The operating control method according to claim 2, characterized in that, before adjusting at least one of the rotational speed of the outdoor fan, the opening degree of the electronic expansion valve, and the operating frequency of the compressor, it further includes: controlling the opening degree of the electronic expansion valve to remain unchanged, obtaining the overall operating current within a first preset time period again, and determining whether it meets the preset fluctuation condition again.

7. The operating control method according to any one of claims 1 to 6, characterized in that, the adjustment of at least one of the rotational speed of the outdoor fan, the opening degree of the electronic expansion valve, and the operating frequency of the compressor includes: reducing the rotational speed of the outdoor fan by a first preset value, and reducing the opening degree of the electronic expansion valve by a second preset value; obtaining the overall operating current within a first preset time period again after an interval of a second preset time period, and determining whether it meets the preset fluctuation condition again; when the reduction times of the rotational speed of the outdoor fan and the opening degree of the electronic expansion valve reach a first preset number of times, and the overall operating current within the first preset time period obtained again still meets the preset fluctuation condition, increasing the operating frequency of the compressor by a third preset value.

8. The operating control method according to claim 7, characterized in that, after increasing the operating frequency of the compressor by a third preset value, it further includes: After an interval of the third preset duration, obtain the operating current of the whole machine within the first preset duration again, and determine whether the preset fluctuation condition is satisfied again; When the preset fluctuation condition is satisfied again, increase the operating frequency of the compressor by the third preset value again until the number of times of increasing the operating frequency of the compressor reaches the second preset number.

9. The operating control method according to any one of claims 1 to 6, characterized in that, adjusting at least one of the rotational speed of the external fan, the opening degree of the electronic expansion valve, and the operating frequency of the compressor includes: decreasing the rotational speed of the external fan by a first preset value; alternatively, decreasing the opening degree of the electronic expansion valve by a second preset value; alternatively, increasing the operating frequency of the compressor by a third preset value.

10. The operating control method according to any one of claims 7 to 9, characterized in that, the value range of the first preset value is 10 to 50 r / min; the value range of the second preset value is 1 to 30 steps; the value range of the third preset value is 1 to 5 Hz.

11. An operating control device, characterized in that, comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the operating control method of the air conditioner according to any one of claims 1 to 10.

12. An air conditioner, characterized in that, comprises the operating control device according to claim 11.

13. A computer-readable storage medium, characterized in that, the computer-readable storage medium stores computer-executable instructions for causing a computer to execute the operating control method of the air conditioner according to any one of claims 1 to 10.

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