Oil return control method and device for compressor and air conditioner

An oil return control and compressor technology, applied in compressors, refrigerators, refrigeration components, etc., can solve the problems of reducing the energy efficiency of the whole machine, unable to accurately judge the oil return, and compressor oil shortage.

Active Publication Date: 2020-05-15
NINGBO AUX ELECTRIC
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Problems solved by technology

However, this mode ignores the actual operating status of the compressor. During the frequency increase process, the frequency of the compressor is likely to be too high, causing the system to trigger high-frequency protection, resulting in too short oil return time, and causing serious oil shortage ...

Method used

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  • Oil return control method and device for compressor and air conditioner
  • Oil return control method and device for compressor and air conditioner
  • Oil return control method and device for compressor and air conditioner

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Embodiment Construction

[0037] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] In addition, if there are descriptions related to "first", "second", etc. below, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance nature or implicitly indicate the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

[0039] The high-speed operation of the air conditioner compressor in the prior art will take out part of its internal lubricating oil, so an oil separator is installed at its outlet, and most of the oil is intercepted by the oil separator and returned to the compressor through the oil return capillary; But there is still a part of lubricating oil that will be brought into the...

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Abstract

The invention provides an oil return control method and device for a compressor and an air conditioner. The control method for the compressor comprises the steps of acquiring the oil return starting frequency of the compressor and controlling the compressor to increase the frequency step by step in a segment frequency increase mode after an oil return mode of the compressor is started; acquiring the operation frequency of the compressor and the oil return time after the oil return mode is started; judgement whether or not the condition of stopping the oil return mode is met according to the operation frequency or the oil return time and the oil return starting frequency; and controlling the compressor to operate at a normal heating or refrigeration frequency when the condition of stoppingthe oil return mode is met so as to stop the oil return mode. According to the oil return control method and device, the operation frequency and the oil return time are used as conditions of judging whether or not the oil return mode is stopped, and the situation is avoided that since the increased frequency is too high, high-frequency protection is triggered, and thus oil return is stopped. It can be guaranteed that the oil return mode is stopped in time, and efficient high-quality oil return is achieved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a compressor oil return control method and device and an air conditioner. Background technique [0002] During the operation of the inverter air conditioner, the lubricating oil will be discharged from the compressor along with the refrigerant and enter the evaporator, condenser and piping. Only when the discharged lubricating oil returns to the compressor smoothly, can the dynamic balance of the lubricating oil in the entire system be maintained, otherwise, the heat exchange effect of the evaporator and condenser will be deteriorated, which will seriously affect the heat exchange effect and system performance. At the same time, the compressor will be damaged due to lack of oil. [0003] The solution commonly used in the prior art is to adopt a timing oil return mode, such as: when the compressor runs for 1.5 hours, the oil returns for ten minutes, which is a cycle and ...

Claims

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Application Information

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IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/004F25B49/022F25B2500/16F25B2600/02
Inventor 王猛陈华刘合心黄春刘潘邓赛峰余超群
Owner NINGBO AUX ELECTRIC
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