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CN-117780610-B - Compressor, diagnostic method and device thereof, readable storage medium and vehicle

CN117780610BCN 117780610 BCN117780610 BCN 117780610BCN-117780610-B

Abstract

The invention provides a compressor, a diagnosis method, a diagnosis device, a readable storage medium and a vehicle thereof, wherein the diagnosis method comprises the steps of periodically obtaining a first temperature value of a power device and a second temperature value of a non-power device; the method comprises the steps of determining a first temperature difference value according to the first temperature value and a second temperature value, determining a temperature rise rate according to the first temperature difference value and a calculation period, and determining a diagnosis result of the compressor according to a comparison result of the first temperature difference value and a preset temperature difference value under the condition that the temperature rise rate is smaller than a preset value, wherein the preset temperature difference value is a temperature difference value of a power device and a non-power device when the compressor has no fault.

Inventors

  • YE BINYING
  • YANG KAICHENG
  • SONG WANJIE

Assignees

  • 安庆威灵汽车部件有限公司
  • 安徽威灵汽车部件有限公司
  • 广东威灵汽车部件有限公司

Dates

Publication Date
20260508
Application Date
20220920

Claims (11)

  1. 1. A method of diagnosing a compressor, the compressor including an electric control board on which power devices and non-power devices are disposed, the method comprising: periodically acquiring a first temperature value of the power device and a second temperature value of the non-power device; Determining a first temperature difference from the first temperature value and the second temperature value; determining a temperature rise rate according to the first temperature difference value and the calculation period; determining a diagnosis result of the compressor according to a comparison result of the first temperature difference value and a preset temperature difference value under the condition that the temperature rise rate is smaller than a preset value; the preset temperature difference value is the temperature difference value of the power device and the non-power device when the compressor has no fault; The determining the diagnosis result of the compressor according to the comparison result of the first temperature difference value and the preset temperature difference value specifically includes: under the condition that the first temperature difference value is larger than the preset temperature difference value, the compressor has a fault; the diagnostic method of the compressor further includes: acquiring the operation parameters of the compressor, wherein the temperature difference value of the power device and the non-power device has an association relation with the operation parameters; determining the preset temperature difference value corresponding to the operation parameter according to the association relation; the operating parameters include one or more of the following: The phase current of the compressor is selected from the group consisting of amplitude of phase current of the compressor, rotational speed value of the compressor, bus voltage value of the compressor, suction pressure of the compressor, discharge pressure of the compressor, suction temperature of the compressor, and discharge temperature of the compressor.
  2. 2. The method of diagnosing a compressor according to claim 1, wherein the determining the diagnosis result of the compressor according to the comparison result of the first temperature difference value and a preset temperature difference value specifically includes: And under the condition that the first temperature difference value is continuously larger than the preset temperature difference value in a first time period, the compressor has faults.
  3. 3. The method for diagnosing a compressor as recited in claim 1, wherein said determining a diagnosis result of said compressor based on a comparison result of said first temperature difference with a preset temperature difference includes, in particular, that said first temperature difference is continuously greater than said preset temperature difference when said compressor is operated at different rotational speeds, said compressor having a fault.
  4. 4. A method of diagnosing a compressor according to any one of claims 1 to 3, further comprising: and outputting alarm information under the condition that the compressor has faults.
  5. 5. A diagnostic device for a compressor, the compressor including an electrical panel having power devices and non-power devices disposed thereon, the diagnostic device comprising: An acquisition unit, configured to periodically acquire a first temperature value of the power device and a second temperature value of the non-power device; a determining unit configured to determine a first temperature difference value according to the first temperature value and the second temperature value; determining a temperature rise rate according to the first temperature difference value and the calculation period; the diagnosis unit is used for determining a diagnosis result of the compressor according to a comparison result of the first temperature difference value and a preset temperature difference value under the condition that the temperature rise rate is smaller than a preset value; the preset temperature difference value is the temperature difference value of the power device and the non-power device when the compressor has no fault; The diagnosis unit is specifically configured to, when the first temperature difference is greater than the preset temperature difference, cause a fault in the compressor; the diagnosis unit is also used for acquiring the operation parameters of the compressor, wherein the temperature difference values of the power device and the non-power device have an association relation with the operation parameters; the operating parameters include one or more of the following: The phase current of the compressor is selected from the group consisting of amplitude of phase current of the compressor, rotational speed value of the compressor, bus voltage value of the compressor, suction pressure of the compressor, discharge pressure of the compressor, suction temperature of the compressor, and discharge temperature of the compressor.
  6. 6. A diagnostic device for a compressor, comprising: A controller and a memory, wherein the memory has stored therein a program or instructions which when executed by the controller performs the steps of the method according to any of claims 1 to 4.
  7. 7. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the method according to any of claims 1 to 4.
  8. 8. A kind of compressor, in which the compressor is composed of a casing, characterized by comprising the following steps: the power device and the non-power device are distributed on the electric control board; A diagnostic device for a compressor as claimed in claim 5 or 6, and/or The readable storage medium of claim 7.
  9. 9. The compressor of claim 8, further comprising: The first temperature detection piece is arranged on the packaging shell of the power device, the joint of the power device and the electric control board or the heat dissipation piece of the power device and is used for obtaining a first temperature value; the second temperature detection piece is arranged at a position, far away from the first temperature detection piece, on the electric control board, of the cavity of the inverter of the compressor and at an air suction port, close to the compressor, on the shell of the compressor and is used for acquiring a second temperature value.
  10. 10. A vehicle, characterized by comprising: a compressor as claimed in claim 8 or 9.
  11. 11. The vehicle of claim 10, characterized in that the vehicle further comprises: and the output device is connected with the compressor and outputs alarm information under the condition that the compressor has faults.

Description

Compressor, diagnostic method and device thereof, readable storage medium and vehicle Technical Field The present invention relates to the field of control technology, and in particular, to a compressor, a diagnostic method and apparatus thereof, a readable storage medium, and a vehicle. Background The compressor is a product of combination of a mechanical part, a motor and an electric control. During operation, faults such as pump body abrasion, tooth breakage, oil shortage, bearing abrasion, motor insulation failure, electric control device damage, heat conduction performance deterioration and the like can occur. In the related technical scheme, a sensor is additionally arranged in the compressor so as to realize fault detection by using the acquisition result of the sensor, for example, the acquisition result is subjected to Fourier transform, and the change of the corresponding frequency characteristic is analyzed so as to obtain the damage of the corresponding part of the compressor, however, the diagnosis scheme of the fault requires larger operation amount and has higher requirement on hardware. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art or related art. To this end, a first aspect of the present invention is to provide a diagnostic method of a compressor. A second aspect of the present invention is to provide a diagnostic device of a compressor. A third aspect of the present invention is to provide a diagnostic device of another compressor. A fourth aspect of the present invention is to provide a readable storage medium. A fifth aspect of the present invention is to provide a compressor. A sixth aspect of the invention is to provide a vehicle. In view of the above, according to a first aspect of the present invention, there is provided a diagnostic method for a compressor including an electronic control board on which a power device and a non-power device are disposed, the diagnostic method including periodically acquiring a first temperature value of the power device and a second temperature value of the non-power device, determining a first temperature difference value according to the first temperature value and the second temperature value, determining a temperature rise rate according to the first temperature difference value and a calculation period, and determining a diagnostic result of the compressor according to a comparison result of the first temperature difference value and the preset temperature difference value in case that the temperature rise rate is smaller than a preset value, wherein the preset temperature difference value is a temperature difference value of the power device and the non-power device when the compressor is free from a fault. In the technical scheme, a diagnosis method of the compressor is provided, and fault detection of the compressor can be realized by operating the diagnosis method, and in the diagnosis method, the fault diagnosis of the compressor is carried out by utilizing a temperature value, so that the calculation amount required by the diagnosis is smaller, and the requirement of the fault diagnosis of the compressor on hardware is further reduced. In addition, the diagnosis method of the compressor provided by the application has the following additional technical characteristics. In the technical scheme, the diagnosis result of the compressor is determined according to the comparison result of the first temperature difference value and the preset temperature difference value, and particularly comprises that the compressor has faults under the condition that the first temperature difference value is larger than the preset temperature difference value. In the technical scheme, the diagnosis process of whether the compressor has faults is simpler, so that the calculation amount required by the judgment process is smaller, and the requirement of fault diagnosis on hardware is further reduced. In any of the above technical solutions, determining the diagnosis result of the compressor according to the comparison result of the first temperature difference value and the preset temperature difference value specifically includes that the compressor has a fault when the first temperature difference value is continuously greater than the preset temperature difference value within the first time period. In the technical scheme, errors are possibly caused in the process of collecting or acquiring the first temperature value and the second temperature value, so that the first temperature value is too large and/or the second temperature value is too small, and the error can cause misjudgment of the diagnosis of the compressor, so that the reliability of the diagnosis result is lower. The technical scheme of the application limits that the fault of the compressor is judged only when the first temperature difference value is always larger than the preset temperature difference value in the