Compressor oil return control method, system and air conditioner

A technology of oil return control and compressor, which is applied in the direction of compressors, refrigerators, refrigeration components, etc., can solve the problems of compressor protection and shutdown, and achieve the effect of avoiding shutdown protection, precise control process, and high degree of reliability

Active Publication Date: 2021-08-13
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a compressor oil return control method, system and air conditioner to solve the technical problem that the existing compressor oil return process easily causes compressor protection shutdown

Method used

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  • Compressor oil return control method, system and air conditioner
  • Compressor oil return control method, system and air conditioner
  • Compressor oil return control method, system and air conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 2 As shown, a compressor oil return control method includes steps:

[0040] S1, the air conditioner starts to return oil;

[0041] S2, detecting the current discharge pressure P of the compressor;

[0042] S3, judging whether the current discharge pressure P of the compressor is ≤ a preset threshold A? If yes, neither control the frequency increase rate nor the frequency decrease rate of the compressor; if not, control the frequency increase rate of the compressor to be V1, and the frequency decrease rate to be V3, and continue to execute step S4;

[0043] S4, judging whether the current discharge pressure P of the compressor is ≤ a preset threshold B? If yes, re-execute step S2; if not, control the frequency up rate of the compressor to be V2 and the frequency down rate to be V3, and continue to perform step S5;

[0044] S5, judging whether the current discharge pressure P of the compressor is ≤ a preset threshold C? If yes, re-execute step S2; if no...

Embodiment 2

[0055] A compressor oil return control method, comprising the steps of:

[0056] S1, the air conditioner starts to return oil;

[0057] S2, detecting the current discharge pressure P of the compressor;

[0058] S3, judging whether the current discharge pressure P of the compressor is ≤ a preset threshold A? If yes, do not control the frequency increase rate of the compressor; if not, control the frequency increase rate of the compressor to be V1, and proceed to step S4;

[0059] S4, judging whether the current discharge pressure P of the compressor is ≤ a preset threshold B? If yes, re-execute step S2; if not, control the frequency increase rate of the compressor to be V2, and continue to execute step S5;

[0060] S5, judging whether the current discharge pressure P of the compressor is ≤ a preset threshold C? If yes, re-execute step S2; if not, control the compressor to stop increasing the frequency and run at the rate of V3 until the current discharge pressure P of the c...

Embodiment 3

[0062] Such as image 3 As shown, a compressor oil return control system includes:

[0063] A compressor discharge pressure detection device, the compressor discharge pressure detection device can detect the current discharge pressure P of the compressor, and transmit the detected current discharge pressure P of the compressor to the compressor discharge pressure analysis module;

[0064] Compressor discharge pressure analysis module, the compressor discharge pressure analysis module can compare the current discharge pressure P of the compressor it receives with the preset thresholds A and B in the air conditioner according to the above-mentioned compressor oil return control method Compare with C, and transmit the comparison result to the main controller of the air conditioner;

[0065] The main controller of the air conditioner, the main controller of the air conditioner can send the compressor frequency increase and decrease control command to the compressor frequency incr...

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Abstract

The invention provides a compressor oil return control method, system and air conditioner, comprising steps: S1, the air conditioner starts oil return; S2, detects the current discharge pressure P of the compressor; S3, judges the current discharge pressure of the compressor Is the pressure P ≤ the preset threshold A? If yes, neither control the frequency increase rate nor the frequency decrease rate of the compressor; if not, control the frequency increase rate of the compressor to be V1, and the frequency decrease rate to be V3, and continue to execute step S4; S4, to determine that the compressor is currently exhausting Is the pressure P ≤ preset threshold B? If yes, re-execute step S2; if not, control the frequency up rate of the compressor to V2 and the frequency down rate to V3, and continue to perform step S5; S5, determine whether the current discharge pressure P of the compressor is ≤ the preset threshold C? If yes, re-execute step S2; if not, control the compressor to stop frequency up and frequency down to V3, the compressor oil return control method, system and air conditioner of the present invention have precise, stable and fast control, and equipment operation It is stable and can effectively avoid the advantages of compressor shutdown protection.

Description

technical field [0001] The invention relates to the technical field of air conditioning equipment, in particular to a compressor oil return control method, system and air conditioner. Background technique [0002] During the operation of the air conditioning system, the lubricating oil of the compressor will be discharged out of the compressor along with the refrigerant, and will return to the compressor along with the refrigerant after circulation. However, due to the essential difference between the performance of refrigerant and lubricating oil, there are two phases of refrigerant in the system circulation process, namely liquid refrigerant and vapor refrigerant, while lubricating oil is basically in liquid state. When the refrigerant changes from liquid to vapor state, lubricating oil It will be separated from the refrigerant. Under the influence of many factors, they are likely to be stored in a certain component or a certain structural point in the air conditioning sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/004F25B49/022Y02B30/70
Inventor 吴海波黄春刘合心李兆东朱礼晋牛晓峰肖旭东魏文文崔成辽叶何立
Owner NINGBO AUX ELECTRIC
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