Operating control method and operating control device for air conditioner, and storage medium

Abstract

The present application discloses an operating control method and operating control device for an air conditioner, and a computer readable storage medium. An air conditioner comprises a compressor (110), an outdoor heat exchanger (140), an indoor heat exchanger (130), and an electronic expansion valve (150) disposed on a refrigerant pipe between the outdoor heat exchanger (140) and the indoor heat exchanger (130). The operating control method comprises: when the operating frequency of the compressor (110) is lower than a first preset frequency, acquiring an overall operating current of the air conditioner (S210); and when the overall operating current within a first preset duration satisfies a preset fluctuation condition, determining that the compressor (110) is in an abnormal rotation fluctuation condition (S220).

Description

Air conditioner operation control method, operation control device and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311646132.7, filed on November 30, 2023, entitled “Operation Control Method, Operation Control Device and Storage Medium for Air Conditioner,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of air conditioning, and in particular to an operation control method, an operation control device, and a computer-readable storage medium for an air conditioner. Background Art

[0004] Currently, inverter air conditioners with a cooling capacity of less than 3 hp typically use rotary compressors, which offer good efficiency across most operating ranges. Rotary compressors use their speed to drive an eccentric rotor, continuously compressing low-pressure gas into high-pressure gas. The vanes and rotor inside the compressor are tightly linked, separating the high-pressure and low-pressure areas. The pressure differential between the high and low pressures allows the vanes and rotor to closely follow each other's movements.

[0005] However, when the compressor is running at low frequency and the indoor and outdoor loads are light, it is easy for the high and low pressures to have little difference. At this time, the vane and the rotor cannot follow closely, but there is an intermittent separation, resulting in the sliding vane hitting the rotor with a rattling sound, affecting the user's comfort.

[0006] Summary of the Invention

[0007] The purpose of this application is to at least partially solve 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.

[0008] In a first aspect, an embodiment of the present application provides an operation control method for an air conditioner, the air conditioner comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an electronic expansion valve disposed on a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, the method including but not limited to the following steps:

[0009] When the operating frequency of the compressor is lower than a first preset frequency, obtaining the entire operating current of the air conditioner; and

[0010] When the whole machine operating current within the first preset time period meets the preset fluctuation condition, it is determined that the compressor has an abnormal rotation fluctuation.

[0011] According to the operation control method of the air conditioner provided in some embodiments of the present application, 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 of the electronic expansion valve, and the operating frequency of the compressor is adjusted to increase the high and low pressure difference of the compressor.

[0012] According to the operation control method of the air conditioner provided in some embodiments of the present application, the preset fluctuation condition is: the difference between the maximum and minimum values ​​of the whole machine operating current within the first preset time period is greater than the product of the average value of the whole machine operating current and a first coefficient, and the first coefficient is greater than 1 and less than 1.1.

[0013] According to the operation control method of the air conditioner provided in some embodiments of the present application, the preset fluctuation condition is: the difference between the maximum value and the average value of the operating current of the whole machine within the 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] According to the operation control method of the air conditioner provided in some embodiments of the present application, the preset fluctuation condition is: the difference between the average 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 and the second coefficient, and the second coefficient is greater than 1 and less than 1.1.

[0015] According to the operation control method of the air conditioner provided in some embodiments of the present application, before adjusting at least one of the external fan speed, the opening of the electronic expansion valve, and the operating frequency of the compressor, it also includes: controlling the opening of the electronic expansion valve to remain unchanged, obtaining the operating current of the whole machine within the first preset time period again and judging whether the preset fluctuation condition is met again.

[0016] According to the operation control method of the air conditioner provided in some embodiments of the present application, the adjustment of at least one of the external fan speed, the opening of the electronic expansion valve, and the operating frequency of the compressor includes: reducing the external fan speed by a first preset value, and reducing the opening of the electronic expansion valve by a second preset value; obtaining the operating current of the entire machine within the first preset time period again after an interval of a second preset time period and judging whether the preset fluctuation condition is met again; and when the number of reductions in the external fan speed and the opening of the electronic expansion valve reaches a first preset number of times, the operating current of the entire machine within the first preset time period re-acquired still meets the preset fluctuation condition, and the operating frequency of the compressor is increased by a third preset value.

[0017] According to the operation control method of the air conditioner provided in some embodiments of the present application, after the operating frequency of the compressor is increased to the third preset value, it also includes: obtaining the operating current of the whole machine within the first preset time period again after an interval of the third preset time period, and judging whether the preset fluctuation condition is met again; and when the preset fluctuation condition is met again, increasing the operating frequency of the compressor by the third preset value again, until the number of increases in the operating frequency of the compressor reaches the second preset number.

[0018] According to the air conditioner operation control method provided in some embodiments of the present application, the adjusting of at least one of the external fan speed, the opening of the electronic expansion valve, and the operating frequency of the compressor includes: reducing the external fan speed by a first preset value.

[0019] According to the operation control method of the air conditioner provided in some embodiments of the present application, the adjusting of at least one of the external fan speed, the opening of the electronic expansion valve, and the operating frequency of the compressor includes: reducing the opening of the electronic expansion valve by a second preset value.

[0020] According to the air conditioner operation control method provided in some embodiments of the present application, the adjusting of at least one of the external fan speed, the opening of the electronic expansion valve, and the operating frequency of the compressor includes: increasing the operating frequency of the compressor to a third preset value.

[0021] According to the air conditioner operation control method provided in some embodiments of the present application, the first preset value ranges from 10 to 50 r / min; the second preset value ranges from 1 to 30 steps; and the third preset value ranges from 1 to 5 Hz.

[0022] In the second aspect, an embodiment of the present application provides an operation control device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the operation control method of the air conditioner as described in the embodiment of the first aspect above.

[0023] In a third aspect, an embodiment of the present application provides an air conditioner, comprising the operation control device as described in the embodiment of the second aspect above.

[0024] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the air conditioner operation control method as described in the embodiment of the first aspect above.

[0025] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0027] The present application is further described below with reference to the accompanying drawings and embodiments;

[0028] FIG1 is a schematic structural diagram of an air conditioner provided in an embodiment of the present application;

[0029] FIG2 is a flow chart of an operation control method of an air conditioner provided by an embodiment of the present application;

[0030] FIG3 is a flow chart of an operation control method of an air conditioner provided by another embodiment of the present application;

[0031] FIG4 is a flow chart of an operation control method of an air conditioner provided by yet another embodiment of the present application; and

[0032] FIG5 is a schematic structural diagram of an operation control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0034] In the description of the embodiments of this application, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, and "above," "below," and "within" are understood to include the number itself. "At least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. If "first," "second," or the like is used in the description, it is only for the purpose of distinguishing technical features and is not to be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] It should be noted that the terms "dispose," "install," and "connect" in the embodiments of this application should be interpreted broadly. Those skilled in the art can reasonably determine the specific meanings of these terms in the embodiments of this application based on the specific content of the technical solution. For example, the term "connect" can refer to mechanical connection, electrical connection, or communication; it can refer to direct connection or indirect connection through an intermediary.

[0036] It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0037] Inverter air conditioners with a cooling capacity of less than 3 horsepower typically use a rotary compressor, which offers good efficiency across most operating ranges. Rotary compressors use speed to drive an eccentric rotor, continuously compressing low-pressure gas into high-pressure gas. The vanes and rotor inside the compressor are tightly linked, separating the high-pressure and low-pressure regions. This pressure differential allows the vanes and rotor to closely follow each other's movements. However, when the compressor operates at low frequencies and when indoor and outdoor loads are light, the difference between high and low pressures can easily become insignificant. In this case, the vanes and rotor cannot closely follow each other, but instead move apart intermittently, resulting in a clattering sound from the vanes hitting the rotor, affecting user comfort. Currently, existing technologies generally address this issue through hardware, but lack relevant detection technologies or adjustment measures in software control.

[0038] Based on this, the embodiments of the present application 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 rotation fluctuations by judging the operating current of the entire machine at the software level, so as to take adjustment measures in time to improve user comfort.

[0039] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0040] Referring to Figure 1 , Figure 1 is a schematic diagram of the structure of an air conditioner provided in an embodiment of the present application. 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 disposed on the refrigerant pipeline between the indoor heat exchanger 130 and the outdoor heat exchanger 140. It will be understood that the operation control methods described in the following embodiments of the present application are not limited to the air conditioner shown in Figure 1 but can also be applied to cooling-only or heating-only air conditioners.

[0041] FIG2 is a flow chart of an operation control method for an air conditioner according to the first embodiment of the present application. Referring to FIG2 , the operation control method includes but is not limited to steps S210 to S220:

[0042] Step S210: When the operating frequency of the compressor 110 is lower than the first preset frequency, the entire operating current of the air conditioner is obtained.

[0043] It should be noted that when the compressor 110 operates at a low frequency and the vanes and rotors intermittently separate and follow each other, it will cause periodic fluctuations in the load of the air conditioner, and then cause periodic fluctuations in the operating current of the entire machine. Therefore, by judging whether the operating current of the entire machine within a period of time meets the preset fluctuation conditions, it can be judged whether the vanes and rotors of the compressor 110 intermittently separate and follow each other.

[0044] Step S220: When the whole machine operating current within the first preset time period meets the preset fluctuation condition, it is determined that the compressor 110 has an abnormal rotation fluctuation.

[0045] According to the provided air conditioner operation control method, when it is detected that the operating frequency of the compressor is lower than the first preset frequency, the whole-machine operating current of the air conditioner is obtained, and the abnormal rotation fluctuation of the compressor is judged based on the whole-machine operating current within the first preset time. The whole-machine operating current can be judged at the software level to detect whether the compressor has abnormal rotation fluctuation, so that adjustment measures can be taken in time to improve user comfort.

[0046] According to the operation control method of the air conditioner provided in some embodiments of the present application, when the operating current of the entire machine within the first preset time period meets the preset fluctuation condition, at least one of the external fan speed, the opening 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.

[0047] According to the operation control method of the air conditioner provided in the embodiment of the present application, when it is detected that the operating frequency of the compressor 110 is lower than the first preset frequency, the whole-machine operating current of the air conditioner is obtained, and whether the high and low pressure differences of the compressor 110 need to be adjusted is determined based on the whole-machine operating current within the first preset time period. When the whole-machine operating current within the first preset time period meets the preset fluctuation condition, at least one of the external fan speed, the opening of the electronic expansion valve 150, and the operating frequency of the compressor 110 is adjusted, thereby increasing the high and low pressure differences of the compressor 110, and timely adjustment measures can be taken to avoid the vanes and rotors of the compressor 110 from separating from each other, thereby avoiding the noise of the vanes hitting the rotors when the air conditioner is running at low frequency, thereby improving the user's comfort.

[0048] In the operation control method of the air conditioner provided in one embodiment of the present application, the preset fluctuation condition is: the difference between the maximum and minimum values ​​of the whole machine operating current within the first preset time period is greater than the product of the average value of the whole machine operating current and the first coefficient, and the first coefficient is greater than 1 and less than 1.1.

[0049] In this embodiment, the first preset duration can be exemplarily set to 10 minutes, and the first coefficient can be exemplarily set to 104%. The maximum value of the whole-machine operating current within the first preset duration is recorded as IaMax, the minimum value of the whole-machine operating current within the first preset duration is recorded as IaMin, and the average value of the whole-machine operating current within the first preset duration is recorded as IaAvg. The preset fluctuation condition can be expressed by the following formula: IaMax-IaMin>IaAvg*104%. When the whole-machine operating current within 10 minutes meets this condition, it can be indicated that the whole-machine operating current of the air conditioner fluctuates greatly during this period, which can also be fed back as unstable load of the air conditioner. Combined with the premise that the operating frequency of the compressor 110 is lower than the first preset frequency, it can be determined that the high and low pressure difference of the compressor 110 is small, the vanes and the rotor cannot follow closely, and intermittent separation occurs. Therefore, corresponding adjustments need to be made to increase the high and low pressure difference of the compressor 110.

[0050] In the operation control method of the air conditioner provided in another embodiment of the present application, 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 time period 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.

[0051] With reference to the aforementioned embodiment, the first preset duration can be exemplarily set to 10 minutes, and the second coefficient can be exemplarily taken as 102%. The maximum value of the whole machine operating current within the first preset duration is recorded as IaMax, and the average value of the whole machine operating current within the first preset duration is recorded as IaAvg. 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 meets this condition, it can be indicated that the whole machine operating current of the air conditioner fluctuates greatly during this period, that is, it can be fed back that the load of the air conditioner is unstable. Combined with the premise that the operating frequency of the compressor 110 is lower than the first preset frequency, it can be determined that the high and low pressure difference of the compressor 110 is small, the vane and the rotor cannot follow closely, and intermittent separation occurs. Therefore, corresponding adjustments need to be made to increase the high and low pressure difference of the compressor 110.

[0052] In another embodiment of the present application, an air conditioner operation control method is provided, wherein 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 time period 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.

[0053] With reference to the aforementioned embodiment, the first preset duration can be exemplarily set to 10 minutes, and the second coefficient can be exemplarily set to 102%. The minimum value of the entire machine operating current within the first preset duration is recorded as IaMin, and the average value of the entire machine operating current within the first preset duration is recorded as IaAvg. The preset fluctuation condition in this embodiment can be expressed by the following formula: IaAvg-IaMin>IaAvg*102%. Similarly, when the entire machine operating current within 10 minutes meets this condition, it can be indicated that the entire machine operating current of the air conditioner fluctuated significantly during this period, which can also be feedback that the load of the air conditioner is unstable. Combined with the premise that the operating frequency of the compressor 110 is lower than the first preset frequency, it can be determined that this is due to the small high and low pressure difference of the compressor 110, the sliding vane and the rotor cannot closely follow each other, and intermittent separation occurs. Therefore, corresponding adjustments need to be made to increase the high and low pressure difference of the compressor 110.

[0054] In the air conditioner operation control method provided in some embodiments of the present application, before performing the operation of adjusting at least one of the outdoor fan speed, the opening degree of the electronic expansion valve 150, and the operating frequency of the compressor 110, the method further includes:

[0055] The opening of the electronic expansion valve 150 is controlled to remain unchanged, and the whole machine operating current within the first preset time period is obtained again to determine whether the preset fluctuation condition is met again.

[0056] It can be understood that when the preset fluctuation condition is met for the first time, the opening of the electronic expansion valve 150 is controlled to remain unchanged, and the operating current of the whole machine is obtained again and a second judgment is performed. This can avoid erroneous judgment caused by the change in the opening of the electronic expansion valve 150 during the first judgment, which is conducive to increasing the accuracy of the adjustment measures for the high and low pressure differences of the compressor 110.

[0057] 3 , in another embodiment of the present application, an air conditioner operation control method is provided, wherein at least one of the outdoor fan speed, the opening of the electronic expansion valve 150 , and the operating frequency of the compressor 110 is adjusted, including but not limited to steps S310 to S330 :

[0058] Step S310: reducing the speed of the outdoor fan by a first preset value, and reducing the opening of the electronic expansion valve 150 by a second preset value;

[0059] Step S320: After a second preset time interval, the whole machine operating current within the first preset time interval is obtained again and it is determined whether the preset fluctuation condition is met again;

[0060] Step S330: When the number of times the external fan speed and the opening of the electronic expansion valve 150 are reduced reaches the first preset number, and the whole machine operating current within the first preset time period reacquired still meets the preset fluctuation condition, the operating frequency of the compressor 110 is increased to the third preset value.

[0061] In this embodiment, measures are first taken to adjust the external fan speed and the opening of the electronic expansion valve 150, and after one adjustment, it is determined again at an interval of a second preset time whether the preset fluctuation condition is met, until the number of adjustments of the external fan speed and the opening of the electronic expansion valve 150 reaches the first preset number, and then measures are taken to adjust the operating frequency of the compressor 110. This can avoid directly lowering the air outlet temperature when the user does not have too high a cooling demand, or avoid directly increasing the air outlet temperature when the user does not have too high a heating demand, and also avoid wasting energy; first take adjustment measures that have less impact on the indoor temperature, while taking into account the user's temperature requirements, avoid the noise of the air conditioner's slider hitting the rotor, the control is more refined, and the user experience is better.

[0062] 3 , in an operation control method for an air conditioner provided in another embodiment of the present application, after increasing the operating frequency of the compressor 110 to a third preset value in step S330, the method further includes steps S340 and S350:

[0063] Step S340: obtaining the whole machine operating current within the first preset time period again after a third preset time period, and determining whether the preset fluctuation condition is met again;

[0064] Step S350: When the preset fluctuation condition is met again, the operating frequency of the compressor 110 is increased again by the third preset value until the number of increases in the operating frequency of the compressor 110 reaches the second preset number.

[0065] In this embodiment, the third preset value may be set to a smaller value, and then adjusted multiple times at intervals to avoid a large adjustment of the operating frequency of the compressor 110 at one time, thereby preventing a large impact on the indoor temperature.

[0066] In an operation control method for an air conditioner provided in another embodiment of the present application, when the entire machine operating current within a first preset time period meets a preset fluctuation condition, the speed of the external fan is reduced by a first preset value.

[0067] The outdoor fan speed is reduced by a first preset value, for example, by 20 r / min from the current speed. It is understood that reducing the outdoor fan speed will reduce the heat exchange efficiency of the outdoor heat exchanger 140, thereby increasing the refrigerant pressure at the front end of the outdoor heat exchanger 140 and lowering the refrigerant pressure at the rear end, thereby increasing the high and low pressure difference of the compressor 110.

[0068] In an operation control method for an air conditioner provided in another embodiment of the present application, when the entire machine operating current within a first preset time period meets a preset fluctuation condition, the opening of the electronic expansion valve 150 is reduced by a second preset value.

[0069] The opening of the electronic expansion valve 150 is reduced by a second preset value. For example, the opening of the electronic expansion valve 150 can be reduced by 15 steps from the current opening. It is understood that after the opening of the electronic expansion valve 150 is reduced, the refrigerant flow rate through the electronic expansion valve 150 decreases, which can also make the refrigerant pressure at the front end of the electronic expansion valve 150 higher and the refrigerant pressure at the rear end lower, thereby increasing the high and low pressure difference of the compressor 110.

[0070] In an operation control method for an air conditioner provided in another embodiment of the present application, when the entire machine operating current within a first preset time period meets a preset fluctuation condition, the operating frequency of the compressor 110 is increased to a third preset value.

[0071] The operating frequency of the compressor 110 is increased 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 is understood that when the operating frequency of the compressor 110 is increased, the rotor of the compressor 110 runs faster, compressing the low-pressure gas into high-pressure gas more quickly, thereby increasing the high-low pressure difference of the compressor 110.

[0072] It can be understood that, unlike the mixed measures taken in Figure 3, any of the three adjustment measures mentioned above can increase the high and low pressure difference of the compressor 110, thereby avoiding the separation between the vanes and the rotor of the compressor 110, and thus avoiding the noise of the vanes hitting the rotor when the air conditioner is running at low frequency, thereby improving the user's comfort.

[0073] According to the air conditioner operation control method provided in some embodiments of the present application, the first preset value ranges from 10 to 50 r / min; the second preset value ranges from 1 to 30 steps; and the third preset value ranges from 1 to 5 Hz.

[0074] Below, in order to more clearly illustrate the operation control method of the air conditioner of the present application, a detailed embodiment of the present application is fully and detailedly introduced in conjunction with Figure 4.

[0075] 4 , the operation control method of the air conditioner includes the following steps:

[0076] Step S401: The air conditioner is running and the operating frequency of the compressor is continuously monitored; jump to step S402;

[0077] 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;

[0078] Step S403: continuously obtain the whole-machine operating current of the air conditioner; jump to step S404;

[0079] Step S404: Determine whether the system's operating current over the past 10 minutes meets a preset fluctuation condition. If so, proceed to step S405; if not, proceed to step S418. The preset fluctuation condition is IaMax - IaMin > IaAvg * 104%, where IaMax is the maximum system operating current over the past 10 minutes, IaMin is the minimum system operating current over the past 10 minutes, and IaAvg is the average system operating current over the past 10 minutes.

[0080] Step S405: Control the opening of the electronic expansion valve 150 to remain unchanged; jump to step S406;

[0081] Step S406: Obtain the whole machine operating current within 10 minutes again; jump to step S407;

[0082] Step S407: Determine again whether the whole machine operating current within 10 minutes meets the preset fluctuation condition. If yes, jump to step S408; if not, jump to step S418;

[0083] Step S408: The speed of the external fan is reduced by 20 r / min, and the opening of the electronic expansion valve 150 is reduced by 15 steps; jump to step S409;

[0084] Step S409: add 1 to the first adjustment number; jump to step S410; wherein the initial value of the first adjustment number is 0;

[0085] Step S410: Determine whether the first adjustment times reaches 3 times. If yes, jump to step S412; if not, jump to step S411;

[0086] Step S411: 5 minutes interval; jump to step S406;

[0087] Step S412: the operating frequency of the compressor 110 is increased by 3 Hz; jump to step S413;

[0088] Step S413: add 1 to the second adjustment number; jump to step S414; wherein the initial value of the second adjustment number is 0;

[0089] Step S414: Determine whether the second adjustment times reaches 5 times. If yes, jump to step S418; if not, jump to step S415;

[0090] Step S415: 5 minutes interval; jump to step S403;

[0091] Step S416: Obtain the whole machine operating current within 10 minutes again; jump to step S417;

[0092] Step S407: Determine again whether the whole machine operating current within 10 minutes meets the preset fluctuation condition. If yes, jump to step S412; if not, jump to step S418;

[0093] Step S418: End.

[0094] The embodiment of the present application obtains the whole-machine operating current of the air conditioner when it detects that the operating frequency of the compressor 110 is lower than the first preset frequency, and determines whether the high and low pressure differences of the compressor 110 need to be adjusted based on the whole-machine operating current within the first preset time period. When the compressor 110 operates at a low frequency, the intermittent separation and contact following of the vane and the rotor occurs, which will cause periodic fluctuations in the load of the air conditioner, and thus cause periodic fluctuations in the whole-machine operating current. Therefore, by determining whether the whole-machine operating current within a period of time meets the preset fluctuation conditions, it can be determined whether the vane and the rotor of the compressor 110 intermittent separation and contact following occurs. When the preset fluctuation conditions are met, at least one of the external fan speed, the opening of the electronic expansion valve 150, and the operating frequency of the compressor 110 is adjusted, thereby increasing the high and low pressure differences of the compressor 110, which can avoid the separation of the vane and the rotor of the compressor 110, thereby avoiding the noise of the vane hitting the rotor when the air conditioner operates at a low frequency, and improving user comfort.

[0095] 5 , the second aspect of the present application provides an operation control device 500, comprising 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 according to the first aspect of the present application, for example, executing method steps S210 to S220 in FIG. 2 , executing method steps S310 to S350 in FIG. 3 , or executing method steps S401 to S418 in FIG. 4 .

[0096] In addition, a third embodiment of the present application provides an air conditioner, comprising the operation control device 500 of the second embodiment as described above.

[0097] In addition, the fourth aspect embodiment of the present application provides a computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are used to enable a computer to execute the operation control method of the air conditioner as described in the first aspect embodiment above, for example, executing method steps S210 to S220 in Figure 2, executing method steps S310 to S350 in Figure 3, or executing method steps S401 to S418 in Figure 4.

[0098] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all of the 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 computer-readable media, which can include computer storage media or non-transitory media and communication media or transient media. As is well known to those skilled in the art, the term computer storage media 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 technology, CD-ROM, digital versatile disks (DVDs) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0099] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. An operation control method for an air conditioner, wherein the air conditioner comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an electronic expansion valve disposed on a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, the method comprising: When the operating frequency of the compressor is lower than a first preset frequency, obtaining the whole machine operating current of the air conditioner; as well as When the whole machine operating current within the first preset time period meets the preset fluctuation condition, it is determined that the compressor has an abnormal rotation fluctuation.

2. The operation control method according to claim 1, wherein: When the whole machine operating current within the first preset time period meets the preset fluctuation condition, at least one of the external fan speed, the opening of the electronic expansion valve, and the operating frequency of the compressor is adjusted to increase the high and low pressure difference of the compressor.

3. The operation control method according to claim 1 or 2, wherein: The preset fluctuation condition is: the difference between the maximum value and the minimum value of the whole machine operating current within the first preset time period is greater than the product of the average value of the whole machine operating current and a first coefficient, and the first coefficient is greater than 1 and less than 1.

1.

4. The operation control method according to any one of claims 1 to 3, wherein: 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 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 operation control method according to any one of claims 1 to 4, wherein: 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 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 operation control method according to any one of claims 2 to 5, wherein: Before adjusting at least one of the speed of the external fan, the opening of the electronic expansion valve, and the operating frequency of the compressor, the method further includes: The opening degree of the electronic expansion valve is controlled to remain unchanged, the whole machine operating current within the first preset time period is obtained again, and it is determined whether the preset fluctuation condition is met again.

7. The operation control method according to any one of claims 2 to 6, wherein: The adjusting at least one of the rotation speed of the external fan, the opening of the electronic expansion valve, and the operating frequency of the compressor includes: Reducing the speed of the external fan by a first preset value, and reducing the opening of the electronic expansion valve by a second preset value; After a second preset time interval, obtaining the whole machine operating current within the first preset time again and determining whether the preset fluctuation condition is met again; and When the number of times the speed of the external fan and the opening of the electronic expansion valve are reduced reaches a first preset number, and the whole machine operating current reacquired within the first preset time period still meets the preset fluctuation condition, the compressor is The operating frequency is increased by a third preset value.

8. The operation control method according to claim 7, wherein: After the operating frequency of the compressor is increased to a third preset value, the method further includes: acquiring the whole machine operating current within the first preset time period again after an interval of a third preset time period, and determining whether the preset fluctuation condition is met again; and When the preset fluctuation condition is met again, the operating frequency of the compressor is increased by the third preset value again until the number of increases in the operating frequency of the compressor reaches the second preset number.

9. The operation control method according to any one of claims 2 to 8, wherein: The adjusting at least one of the rotation speed of the external fan, the opening of the electronic expansion valve, and the operating frequency of the compressor includes: reducing the speed of the external fan by a first preset value; Alternatively, the opening of the electronic expansion valve is reduced by a second preset value; Alternatively, the operating frequency of the compressor is increased by a third preset value.

10. The operation control method according to any one of claims 7 to 9, wherein: The first preset value ranges from 10 to 50 r / min; the second preset value ranges from 1 to 30 steps; and the third preset value ranges from 1 to 5 Hz.

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

12. An air conditioner comprising the operation control device according to claim 11.

13. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to enable a computer to execute the operation control method of the air conditioner according to any one of claims 1 to 10.

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