Oil return control method for an air-conditioning compressor unit

A compressor unit and oil return control technology, which is applied in the direction of compressors, refrigerators, refrigeration components, etc., can solve the problems of ignoring the operation status of the unit, unfavorable unit operation stability and high-efficiency and high-quality oil return, so as to improve the operation stability and The effect of oil return efficiency

Active Publication Date: 2020-02-14
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] At present, most of the oil return modes of compressor units are timing oil return mode, but this mode ignores the actual operating conditions of the unit, such as low frequency / high frequency operation of the compressor unit
However, it is inappropriate to implement the same fixed-time oil return mode under low-frequency high-load operation and high-frequency low-load operation, which is not conducive to stable operation of the unit and high-efficiency and high-quality oil return.

Method used

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  • Oil return control method for an air-conditioning compressor unit
  • Oil return control method for an air-conditioning compressor unit
  • Oil return control method for an air-conditioning compressor unit

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Embodiment Construction

[0023] The invention provides an oil return control method of an air conditioner compressor unit, which judges whether the operation state of the compressor unit reaches the set oil return condition according to the operation parameters of the compressor unit, and when the operation state of the compressor unit reaches the set oil return condition , to control the compressor unit to run in the oil return mode. The following will be described in conjunction with specific embodiments.

[0024] Such as figure 1 As shown, in Embodiment 1 of the present invention, the oil return control method of the air-conditioning compressor unit includes:

[0025] Step S1: Calculate the real-time oil return critical temperature according to the real-time exhaust temperature of the compressor unit, and calculate the equivalent oil return interval time according to the operating frequency of the compressor unit after starting or after the oil return is completed and the operating time at each fr...

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Abstract

The invention discloses an oil return control method of an air conditioner compressor unit. Whether the operation state of the compressor unit reaches set oil return conditions or not is judged according to operation parameters of the compressor unit, and when the operation state of the compressor unit reaches set oil return conditions, the compressor unit is controlled to be operated in an oil return mode. By means of the oil return control method of the compressor unit, the air conditioner unit can operate stably, and the oil return efficiency is improved.

Description

technical field [0001] The invention relates to the field of control of an air-conditioning compressor unit, in particular to an oil return control method of an air-conditioning compressor unit. Background technique [0002] During the operation of the air conditioner, the high-speed operation of the compressor unit will take out part of the lubricating oil inside, 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 unit through the oil return capillary; but There is still a part of lubricating oil that will be brought into the condenser, evaporator, and connecting pipelines, but the air conditioning pipeline is relatively long, and some indoor units and outdoor units have a large height difference, so it is difficult to carry the lubricating oil at high speed under normal operation Therefore, it is necessary to let the compressor unit run at a high frequency, and under the rapid flow of refri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/002F25B49/022
Inventor 申传涛焦华超张仕强武连发袁国炉
Owner GREE ELECTRIC APPLIANCES INC
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