Auxiliary oil return control method, control device and air conditioner
A technology of oil return control and compressor, which is applied in the field of compressors, can solve the problems of increased wear, oil shortage operation, damage to compressors, etc., and achieves the effect of simple structure
Active Publication Date: 2022-01-18
NINGBO AUX ELECTRIC
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Problems solved by technology
[0003] However, when the operation of the compressor does not meet the oil return control judgment conditions, there will also be abnormal situations and oil shortage operation
Under the condition that other operating conditions remain unchanged, as the wear increases, the compressor will be damaged due to lack of oil before the cumulative operating time is reached
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[0039] The compressor needs to return oil during operation, otherwise the compressor will be aggravated due to lack of oil and cause damage to the compressor. For the control of the oil return program in the prior art, judgment and control are mostly made by means of compressor running time and operating frequency. For example, when the compressor running time reaches 4 hours, the compressor is controlled to perform the oil return program. The process of oil return is controlled by the running time of the compressor, and it is impossible to avoid the situation of abnormal lack of oil and the need for oil return. When the compressor is short of oil for less than 4 hours, the air conditioner does not return oil, and the compressor will suffer from large wear due to oil shortage, which will accelerate the aging of the compressor and even damage the compressor. The invention provides an auxiliary oil return control method for a compressor. On the basis of the main oil return contr...
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The invention provides an auxiliary oil return control method, a control device and an air conditioner, which relate to the technical field of compressors and include the following steps: when the compressor is running, obtain the compressor running current value and exhaust temperature value, and the compressor running frequency and / or exhaust pressure value; calculate current value change rate and exhaust temperature value change, and frequency change and / or exhaust pressure value change; change according to the current value change rate and the exhaust gas temperature value amount, and the frequency change amount or the discharge pressure value change amount, it is judged whether the compressor enters the oil return procedure. According to the auxiliary oil return control method, control device and air conditioner of the present invention, the change rate of the current value and the change amount of the exhaust temperature value, as well as the change amount of the frequency and / or the change of the exhaust pressure value It is more accurate to judge whether it is necessary to return oil or not, which can effectively prevent the occurrence of abnormal oil shortage and no oil return, and protect the normal operation of the compressor in time.
Description
technical field [0001] The invention relates to the technical field of compressors, in particular to an auxiliary oil return control method, a control device and an air conditioner. Background technique [0002] The oil return control of the existing air conditioner compressor is as follows: judging whether the compressor enters the oil return according to the operating frequency and the accumulated operating time. In consideration of avoiding frequent oil return operation of the compressor, most manufacturers control the cumulative time of oil return to more than 4 hours. [0003] However, when the operation of the compressor fails to meet the judgment conditions of the oil return control, an abnormal situation may occur and the oil shortage operation may occur. Under the condition that other operating conditions remain unchanged, as the wear increases, the compressor will be damaged due to lack of oil before the cumulative operating time is reached. Contents of the inve...
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IPC IPC(8): F25B31/00F25B49/02F24F11/32F24F11/64F24F11/88
CPCF25B31/004F25B49/02F24F11/32F24F11/64F24F11/88F25B2500/16Y02B30/70
Inventor 何彦伟黄春刘合心李兆东陈东牛晓峰
Owner NINGBO AUX ELECTRIC