A compressor control method, device and unit

Abstract

The present invention discloses a compressor control method, device and unit. The method is applied to a unit including at least two compressors connected in parallel, and the method includes: when the unit needs to load or unload the compressor, respectively obtain the cumulative number of rotations of each compressor, wherein the cumulative number of rotations represents the degree of wear of the compressor; and perform loading and unloading control of the compressor according to the cumulative number of rotations. The present invention uses the cumulative number of rotations of the compressor as a basis for measuring the degree of wear of the compressor, determines the loading and unloading priority of the compressor according to the different degrees of aging and wear of each compressor in the unit, realizes the rotation operation of the compressor, and allocates and uses each compressor more scientifically and reasonably, so as to make the degree of wear of all compressors as close as possible, prolong the service life of the unit, and solves the problem that the uneven operation of each compressor in the same unit leads to inconsistent wear and tear and affects the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor control, and in particular to a compressor control method, device and unit. Background Art

[0002] In current multi-module, multi-system products (such as heat pump units or single cooling units), including at least two compressors connected in parallel, in order to ensure that the degree of wear of each compressor is similar, compressor rotation technology is used for control, that is, the start and stop of the compressor is controlled according to the accumulated running time of each compressor, so as to realize the rotation operation between the compressors.

[0003] The above-mentioned rotation technology is mainly used to control fixed-frequency compressors. When it is directly migrated to a multi-system of variable-frequency compressors for use, the accumulated running time cannot accurately reflect the degree of wear of the compressor because different compressors or the same compressor have different operating frequencies at different times.

[0004] With regard to the problem in the prior art that the compressors in the same unit operate unevenly, resulting in inconsistent wear and tear and affecting the service life, no effective solution has been proposed so far. Summary of the invention

[0005] The embodiments of the present invention provide a compressor control method, device and unit, so as to at least solve the problem in the prior art that the compressors in the same unit operate unevenly, resulting in inconsistent wear and tear and affecting the service life.

[0006] To solve the above technical problems, an embodiment of the present invention provides a compressor control method, which is applied to a unit including at least two compressors connected in parallel. The compressor control method includes:

[0007] When the unit needs to load or unload the compressor, the accumulated number of rotations of each compressor is obtained respectively, wherein the accumulated number of rotations represents the degree of wear of the compressor;

[0008] The loading and unloading of the compressor is controlled according to the accumulated number of rotations.

[0009] Optionally, the cumulative number of rotations of each compressor is obtained separately, including:

[0010] For each compressor, the accumulated number of rotations of the compressor is determined according to the rotation frequency of the compressor at each moment; or,

[0011] For each compressor, the cumulative number of rotations of the compressor is determined based on the rotation frequency of the compressor at each time and the load of the compressor when it rotates.

[0012] Optionally, determining the cumulative number of rotations of the compressor according to the rotation frequency of the compressor at each moment and the load of the compressor when the compressor rotates includes:

[0013] Obtaining the rotation frequency and operating current of the compressor at the current moment;

[0014] Calculating the corrected number of revolutions corresponding to one revolution of the compressor under the operating current;

[0015] Calculating the number of rotations per unit time of the compressor under the operating current according to the rotation frequency and the corrected number of rotations;

[0016] The cumulative number of revolutions of the compressor during the cumulative operating time is calculated according to the number of revolutions per unit time.

[0017] Optionally, the following formula is used to calculate the corrected number of revolutions corresponding to one revolution of the compressor under the operating current:

[0018]

[0019] Where Y′(t) represents the corrected number of revolutions of the compressor at the operating current I(t) at time t, I(t) represents the operating current of the compressor at time t, I0 represents the rated current of the compressor, and I M Indicates the maximum current of the compressor; when the compressor runs one circle at I0, it is considered that the compressor has rotated one circle; when the compressor runs one circle at I M For one revolution, the compressor is considered to have rotated n times.

[0020] Optionally, calculating the number of rotations of the compressor per unit time under the operating current according to the rotation frequency and the corrected number of rotations includes:

[0021] The product of the rotation frequency and the corrected number of revolutions is calculated to obtain the number of revolutions of the compressor per unit time under the operating current.

[0022] Optionally, the following formula is used to calculate the cumulative number of revolutions of the compressor during the cumulative operating time:

[0023]

[0024] Wherein, Y represents the cumulative number of revolutions of the compressor during the cumulative operating time, T represents the cumulative operating time of the compressor, Y′(t) represents the corrected number of revolutions corresponding to one revolution of the compressor at the operating current I(t) at time t, f(t) represents the rotation frequency at time t, and Y′(t)×f(t) represents the number of revolutions of the compressor per unit time at the operating current I(t).

[0025] Optionally, performing loading and unloading control of the compressor according to the accumulated number of rotations includes:

[0026] When loading is required, the compressor with the smallest cumulative rotation number is prioritized for frequency increase or start-up;

[0027] When unloading is required, the compressor with the largest cumulative number of revolutions shall be preferentially reduced in frequency or shut down.

[0028] Optionally, performing loading and unloading control of the compressor according to the accumulated number of rotations further includes:

[0029] For compressors with the same cumulative number of rotations, the loading and unloading priorities of the compressors are determined according to preset parameters.

[0030] An embodiment of the present invention further provides a compressor control device, which is applied to a unit including at least two compressors connected in parallel, and the compressor control device includes:

[0031] An acquisition module, used for respectively acquiring the cumulative number of rotations of each compressor when the unit needs to load or unload the compressor, wherein the cumulative number of rotations represents the degree of wear of the compressor;

[0032] A control module is used to control the loading and unloading of the compressor according to the accumulated number of rotations.

[0033] The embodiment of the present invention further provides a unit, comprising: the compressor control device described in the embodiment of the present invention.

[0034] An embodiment of the present invention further provides a computer device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the embodiment of the present invention when executing the computer program.

[0035] The embodiment of the present invention further provides a non-volatile computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the embodiment of the present invention are implemented.

[0036] By applying the technical solution of the present invention, the cumulative number of revolutions of the compressor is used as the basis for measuring the degree of wear of the compressor, and the loading and unloading control of the compressor is performed according to the cumulative number of revolutions of each compressor in the unit. That is, the cumulative number of revolutions is used as a measurement indicator, and the loading and unloading priority of the compressor is determined according to the different degrees of aging and wear of the compressor, so as to realize the rotation operation of the compressor, and allocate and use the compressors in a more scientific and reasonable manner, so that the wear degrees of all compressors are as similar as possible, thereby extending the service life of the unit, and solving the problem that the uneven operation of the compressors in the same unit leads to inconsistent wear degrees and affects the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flow chart of a compressor control method provided by an embodiment of the present invention;

[0038] Figure 2 is a flow chart of compressor rotation operation control provided by an embodiment of the present invention;

[0039] Figure 3 4 is a structural block diagram of a compressor control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that the terms "including" and "having" and any variations thereof in the specification, claims and drawings of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0042] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] An embodiment of the present invention provides a compressor control method, which is applied to a unit including at least two compressors connected in parallel, such as a multi-module unit, a multi-split unit, etc.

[0044] Figure 1 is a flow chart of a compressor control method provided by an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0045] S101, when the unit needs to load or unload the compressor, the accumulated number of rotations of each compressor is obtained respectively, wherein the accumulated number of rotations represents the degree of wear of the compressor.

[0046] S102, performing loading and unloading control of the compressor according to the accumulated number of rotations.

[0047] The compressor can be a variable frequency compressor. The loading of the variable frequency compressor includes: frequency increase or opening, and the unloading of the variable frequency compressor includes: frequency reduction or closing. The wear of the compressor caused by running at different frequencies at the same time is different. Compared with the cumulative running time of the compressor, the cumulative number of revolutions of the compressor can more accurately reflect the degree of wear of the compressor. The compressor control method of the embodiment of the present invention is also applicable to fixed frequency compressors, that is, the loading and unloading (i.e. opening and closing) of the fixed frequency compressor can also be controlled according to the cumulative number of revolutions.

[0048] This embodiment uses the cumulative number of revolutions of the compressor as the basis for measuring the degree of wear of the compressor, and controls the loading and unloading of the compressor according to the cumulative number of revolutions of each compressor in the unit. That is, the cumulative number of revolutions is used as a measurement indicator, and the loading and unloading priority of the compressor is determined according to the different degrees of aging and wear of the compressors, so as to realize the rotation operation of the compressors, and allocate and use the compressors in a more scientific and reasonable manner, so that the wear degrees of all compressors are as close as possible, thereby extending the service life of the unit, and solving the problem of inconsistent wear degrees caused by uneven operation of the compressors in the same unit, which affects the service life.

[0049] In one embodiment, the cumulative number of rotations of each compressor can be obtained by the following method (1) or (2):

[0050] (1) For each compressor, the cumulative number of rotations of the compressor is determined based on the rotation frequency of the compressor at each moment.

[0051] The rotation frequency of the compressor refers to the number of revolutions of the compressor per unit time, which is a controllable attribute parameter of the compressor itself. The cumulative number of revolutions of the compressor during this period can be obtained by simply adding up the rotation frequencies at each moment in a period of time.

[0052] (2) For each compressor, the cumulative number of rotations of the compressor is determined based on the rotation frequency of the compressor at each time and the load when the compressor rotates.

[0053] When the compressor rotates under different operating currents, the compressor load is different. The degree of wear caused by the same number of revolutions of the compressor under different loads is different. The greater the compressor load, the more serious the wear. Therefore, the load when the compressor rotates can be used as a basis for correcting the degree of compressor wear. The load when the compressor rotates is positively correlated with the compressor operating current. In practical applications, the actual number of revolutions of the compressor can be corrected according to the compressor operating current.

[0054] Under the premise of using the cumulative number of revolutions of the compressor as the basis for measuring the degree of wear of the compressor, this method uses the load when the compressor is rotating as the basis for correcting the degree of wear of the compressor. The corrected cumulative number of revolutions can more truly reflect the degree of wear of the compressor, and then the loading and unloading priority of the compressor can be more reasonably determined based on the corrected cumulative number of revolutions, making the control of the rotation operation of the compressor more reasonable and scientific, making the wear degree of all compressors as similar as possible, and extending the service life of the unit.

[0055] Specifically, the cumulative number of rotations of the compressor is determined based on the rotation frequency of the compressor at each moment and the load when the compressor rotates, including: obtaining the rotation frequency and operating current of the compressor at the current moment; calculating the corrected number of rotations corresponding to one rotation of the compressor under the operating current; calculating the number of rotations of the compressor per unit time under the operating current based on the rotation frequency and the corrected number of rotations; and calculating the cumulative number of rotations of the compressor in the cumulative operating time based on the number of rotations per unit time.

[0056] The cumulative running time and cumulative number of revolutions of each compressor need to be recorded and calculated independently, and used for comparison to determine the loading and unloading priority. The number of corrected revolutions is positively correlated with the running current.

[0057] In this embodiment, the actual number of revolutions of the compressor can be obtained through the rotation frequency of the compressor, and the corrected number of revolutions of the compressor can be obtained through the operating current of the compressor, and then the cumulative number of revolutions can be obtained based on the actual number of revolutions and the corrected number of revolutions, so as to accurately and reasonably determine the loading and unloading priority of the compressor.

[0058] Furthermore, the following formula is used to calculate the corrected number of revolutions corresponding to one revolution of the compressor under the operating current:

[0059]

[0060] Where Y′(t) represents the corrected number of revolutions of the compressor at the operating current I(t) at time t, I(t) represents the operating current of the compressor at time t, I0 represents the rated current of the compressor, and I M Indicates the maximum current of the compressor. When the compressor runs one circle with its rated current I0, it is considered that the compressor has rotated one circle. When the compressor runs with its maximum current I M The compressor is considered to have rotated n times for one revolution. Due to the differences in compressor types, materials, structures, and lubrication conditions, the wear conditions of the friction surfaces of the rotating parts are also different. Therefore, the value of n can be determined based on experiments. For example, n is 3.

[0061] The greater the operating current of the compressor, the greater the load on the compressor when it rotates. The wear of the compressor when it runs at its maximum current for one circle is greater than that of the compressor when it runs at its rated current for one circle. Therefore, "it is considered that the compressor has rotated n circles" means that under the same degree of wear, running the compressor at its maximum current for one circle is equivalent to rotating it n circles at its rated current.

[0062] The operating current of the compressor must be less than its maximum current. The number of corrected turns is linearly positively correlated with the operating current. For example, the compressor operating current is used as the horizontal coordinate and the number of corrected turns is used as the vertical coordinate to establish a coordinate system. According to the coordinates (I0, 1) and (I M , n) can draw a straight line, and the coordinates of any point on the straight line can be obtained, that is, the corrected number of revolutions corresponding to one revolution of the compressor under any operating current can be obtained.

[0063] The above formula can accurately and reliably calculate the corrected number of revolutions corresponding to one revolution of the compressor under any operating current.

[0064] Further, the number of rotations per unit time of the compressor under the operating current is calculated according to the rotation frequency and the corrected number of rotations, including: calculating the product of the rotation frequency and the corrected number of rotations to obtain the number of rotations per unit time of the compressor under the operating current. In this way, the number of rotations per unit time of the compressor under any operating current can be corrected to ensure the accuracy and reliability of the accumulated number of rotations.

[0065] Furthermore, the following formula is used to calculate the cumulative number of revolutions of the compressor during the cumulative operating time:

[0066]

[0067] Wherein, Y represents the cumulative number of revolutions of the compressor during the cumulative operating time, T represents the cumulative operating time of the compressor, Y′(t) represents the corrected number of revolutions corresponding to one revolution of the compressor at the operating current I(t) at time t, f(t) represents the rotation frequency at time t, and Y′(t)×f(t) represents the number of revolutions of the compressor per unit time at the operating current I(t).

[0068] The above formula can accurately and reliably calculate the cumulative number of revolutions of the compressor to accurately reflect the degree of compressor wear, thereby achieving balanced rotation control of the compressor.

[0069] In one embodiment, the loading and unloading of the compressors is controlled according to the accumulated number of rotations, including: when loading is required, the compressor with the smallest accumulated number of rotations is preferentially increased in frequency or turned on; when unloading is required, the compressor with the largest accumulated number of rotations is preferentially reduced in frequency or turned off. In this way, the degree of wear of each compressor can be balanced and the service life of the unit can be extended.

[0070] In one embodiment, the loading and unloading control of the compressor is performed according to the accumulated number of rotations, and further includes: for compressors with the same accumulated number of rotations, the loading and unloading priority of the compressors is determined according to preset parameters. The preset parameters may be module numbers or dial addresses, for example, if the accumulated number of rotations is the same, the compressor with a lower dial address is preferentially turned on, off, or the frequency is increased or decreased. For compressors with the same accumulated number of rotations, this embodiment can determine the loading and unloading priority of the compressors according to preset parameters, thereby realizing the rotation operation of the compressors.

[0071] The compressor control method is described below in conjunction with a specific embodiment. However, it is worth noting that this specific embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application. The explanation of terms that are the same or corresponding to the above embodiment will not be repeated in this embodiment.

[0072] like Figure 2 As shown, the compressor rotation operation control process includes the following steps:

[0073] S201, determining whether the multi-module unit needs to load or unload the compressor.

[0074] S202, determining that it needs to be turned on or frequency increased.

[0075] S203, obtaining the cumulative number of running revolutions Y1, Y2, YN of each compressor in the unit, where N represents the number of compressors.

[0076] S204, start or increase the frequency of the compressor with the smallest cumulative running number of revolutions, and return to S201 to continue judging.

[0077] S205, determining that shutdown or frequency reduction is required.

[0078] S206, obtaining the cumulative number of running revolutions Y1, Y2, YN of each compressor in the unit, where N represents the number of compressors.

[0079] S207, shut down or reduce the frequency of the compressor with the largest cumulative running number of revolutions, and return to S201 to continue judging.

[0080] In steps S203 and S206, the accumulated number of revolutions of the compressor is used as the basis for measuring the degree of wear of the compressor, and the load of the compressor during rotation is used as the basis for correcting the degree of wear. When the variable frequency compressor runs one revolution with its rated current I0, it is considered that the compressor has rotated one revolution; when the variable frequency compressor runs one revolution with its maximum current I MBased on the above two coordinate points, the interpolation method is used to calculate the corrected number of revolutions Y′(t) corresponding to one revolution of the compressor at any time t under the operating current I(t) (less than the maximum current). The rotation frequency of the compressor at time t is f(t), and the number of revolutions per unit time of the compressor under any operating current I(t) is Y′(t)×f(t). After the cumulative operation time T, the cumulative number of revolutions of the Nth variable frequency compressor is Y N for

[0081] This embodiment aims at multiple parallel compressors in a multi-module unit. According to the different degrees of aging and wear of the compressors, it ensures that the compressors are deployed and used more scientifically and reasonably during the operation of the unit, realizes the rotation operation control of the compressors, and solves the problem of uneven operation of the compressors in the same unit, resulting in inconsistent wear degrees and affecting the service life.

[0082] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0083] Based on the same inventive concept, an embodiment of the present invention further provides a compressor control device, which is applied to a unit including at least two compressors connected in parallel and can be used to implement the compressor control method described in the above embodiment. The compressor control device can be implemented by software and / or hardware.

[0084] Figure 3 is a structural block diagram of a compressor control device provided by an embodiment of the present invention, such as Figure 3 As shown, the compressor control device comprises:

[0085] An acquisition module 31 is used to acquire the cumulative number of rotations of each compressor when the unit needs to load or unload the compressor, wherein the cumulative number of rotations represents the degree of wear of the compressor;

[0086] The control module 32 is used to control the loading and unloading of the compressor according to the accumulated number of rotations.

[0087] Optionally, the acquisition module 31 is specifically used for:

[0088] For each compressor, the accumulated number of rotations of the compressor is determined according to the rotation frequency of the compressor at each moment; or,

[0089] For each compressor, the cumulative number of rotations of the compressor is determined based on the rotation frequency of the compressor at each time and the load of the compressor when it rotates.

[0090] Optionally, the acquisition module 31 includes:

[0091] An acquisition unit, used for acquiring the rotation frequency and operating current of the compressor at the current moment;

[0092] A first calculation unit, used for calculating the corrected number of revolutions corresponding to one revolution of the compressor under the operating current;

[0093] A second calculation unit, used for calculating the number of rotations of the compressor per unit time under the operating current according to the rotation frequency and the corrected number of rotations;

[0094] The third calculation unit is used to calculate the cumulative number of rotations of the compressor within the cumulative operating time according to the number of rotations per unit time.

[0095] Optionally, the first calculation unit uses the following formula to calculate the corrected number of revolutions corresponding to one revolution of the compressor under the operating current:

[0096]

[0097] Where Y′(t) represents the corrected number of revolutions of the compressor at the operating current I(t) at time t, I(t) represents the operating current of the compressor at time t, I0 represents the rated current of the compressor, and I M Indicates the maximum current of the compressor; when the compressor runs one circle at I0, it is considered that the compressor has rotated one circle; when the compressor runs one circle at I M For one revolution, the compressor is considered to have rotated n times.

[0098] Optionally, the second calculation unit is specifically used to calculate the product of the rotation frequency and the corrected number of revolutions to obtain the number of revolutions of the compressor per unit time under the operating current.

[0099] Optionally, the third calculation unit uses the following formula to calculate the cumulative number of rotations of the compressor during the cumulative running time:

[0100]

[0101] Wherein, Y represents the cumulative number of revolutions of the compressor during the cumulative operating time, T represents the cumulative operating time of the compressor, Y′(t) represents the corrected number of revolutions corresponding to one revolution of the compressor at the operating current I(t) at time t, f(t) represents the rotation frequency at time t, and Y′(t)×f(t) represents the number of revolutions of the compressor per unit time at the operating current I(t).

[0102] Optionally, the control module 32 includes:

[0103] A first control unit is used for, when loading is required, giving priority to increasing the frequency or starting the compressor with the smallest cumulative number of rotations;

[0104] The second control unit is used to preferentially reduce the frequency or shut down the compressor with the largest cumulative number of rotations when unloading is required.

[0105] Optionally, the control module 32 further includes:

[0106] The third control unit is used to determine the loading and unloading priorities of the compressors according to preset parameters for the compressors with the same cumulative number of rotations.

[0107] The above compressor control device can execute the compressor control method provided by the embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not described in detail in this embodiment, please refer to the compressor control method provided by the embodiment of the present invention.

[0108] An embodiment of the present invention further provides a unit, comprising: the compressor control device described in the above embodiment.

[0109] An embodiment of the present invention further provides a computer device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the above embodiment when executing the computer program.

[0110] An embodiment of the present invention further provides a non-volatile computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the above embodiment are implemented.

[0111] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0112] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compressor control method, applied to a unit including at least two compressors connected in parallel, characterized in that: The compressor control method comprises: When the unit needs to load or unload the compressor, the accumulated number of rotations of each compressor is obtained respectively, wherein the accumulated number of rotations represents the degree of wear of the compressor; Performing loading and unloading control of the compressor according to the accumulated number of rotations; Obtaining the accumulated number of rotations of each compressor respectively includes: for each compressor, determining the accumulated number of rotations of the compressor according to the rotation frequency of the compressor at each moment; or, for each compressor, determining the accumulated number of rotations of the compressor according to the rotation frequency of the compressor at each moment and the load when the compressor rotates; Determining the cumulative number of rotations of the compressor according to the rotation frequency of the compressor at each moment and the load of the compressor when it rotates, including: obtaining the rotation frequency and operating current of the compressor at the current moment; calculating the corrected number of rotations corresponding to one rotation of the compressor under the operating current; calculating the number of rotations of the compressor per unit time under the operating current according to the rotation frequency and the corrected number of rotations; calculating the cumulative number of rotations of the compressor in the cumulative operating time according to the number of rotations per unit time; The loading and unloading of the compressor is controlled according to the accumulated number of rotations, including: when loading is required, the compressor with the smallest accumulated number of rotations is preferentially increased in frequency or turned on; when unloading is required, the compressor with the largest accumulated number of rotations is preferentially reduced in frequency or turned off.

2. The method according to claim 1, characterized in that The following formula is used to calculate the corrected number of revolutions corresponding to one revolution of the compressor at the operating current: Where Y′(t) represents the corrected number of revolutions of the compressor at the operating current I(t) at time t, I(t) represents the operating current of the compressor at time t, I0 represents the rated current of the compressor, and I M Indicates the maximum current of the compressor; when the compressor runs one circle at I0, it is considered that the compressor has rotated one circle; when the compressor runs one circle at I M For one revolution, the compressor is considered to have rotated n times.

3. The method according to claim 1, characterized in that Calculating the number of rotations of the compressor per unit time under the operating current according to the rotation frequency and the corrected number of rotations includes: The product of the rotation frequency and the corrected number of revolutions is calculated to obtain the number of revolutions of the compressor per unit time under the operating current.

4. The method according to claim 1, characterized in that: The following formula is used to calculate the cumulative number of revolutions of the compressor during the cumulative operating time: Wherein, Y represents the cumulative number of revolutions of the compressor during the cumulative operating time, T represents the cumulative operating time of the compressor, Y′(t) represents the corrected number of revolutions corresponding to one revolution of the compressor at time t under the operating current I(t), f(t) represents the rotation frequency at time t, and Y′(t)×f(t) represents the number of revolutions of the compressor per unit time under the operating current I(t).

5. The method according to claim 1, characterized in that The method further comprises: performing loading and unloading control of the compressor according to the accumulated number of rotations; For compressors with the same cumulative number of rotations, the loading and unloading priorities of the compressors are determined according to preset parameters.

6. A compressor control device, applied to a unit including at least two compressors connected in parallel, characterized in that: The compressor control device comprises: An acquisition module, used for respectively acquiring the cumulative number of rotations of each compressor when the unit needs to load or unload the compressor, wherein the cumulative number of rotations represents the degree of wear of the compressor; A control module, used for controlling the loading and unloading of the compressor according to the accumulated number of rotations; The acquisition module is used to: for each compressor, determine the cumulative number of rotations of the compressor according to the rotation frequency of the compressor at each moment; or, for each compressor, determine the cumulative number of rotations of the compressor according to the rotation frequency of the compressor at each moment and the load when the compressor rotates; The acquisition module comprises: An acquisition unit, used for acquiring the rotation frequency and operating current of the compressor at the current moment; A first calculation unit, used for calculating the corrected number of revolutions corresponding to one revolution of the compressor under the operating current; A second calculation unit, used for calculating the number of rotations of the compressor per unit time under the operating current according to the rotation frequency and the corrected number of rotations; A third calculation unit, used for calculating the cumulative number of rotations of the compressor within the cumulative running time according to the number of rotations per unit time; The control module comprises: A first control unit is used for, when loading is required, giving priority to increasing the frequency or starting the compressor with the smallest cumulative number of rotations; The second control unit is used to preferentially reduce the frequency or shut down the compressor with the largest cumulative number of rotations when unloading is required.

7. A unit, characterized in that: include: The compressor control device as claimed in claim 6.

8. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 5 when executing the computer program.

9. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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