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Method and device for controlling frequency of compressor

A compressor frequency and control method technology, applied in pump control, mechanical equipment, machines/engines, etc., can solve problems such as poor heating effect, insufficient heating, and failure to return oil to the high-pressure side refrigerant in time, so as to achieve sufficient oil volume and ensure The effect of the heating effect

Active Publication Date: 2014-03-26
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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Problems solved by technology

[0007] The present invention provides a compressor frequency control method and device to at least solve the problems in the related art that the gas-liquid separator cannot return oil in time when there is a lot of liquid and the high-pressure side refrigerant is insufficient, resulting in poor heating effect

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  • Method and device for controlling frequency of compressor
  • Method and device for controlling frequency of compressor
  • Method and device for controlling frequency of compressor

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Embodiment Construction

[0024] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0025] An embodiment of the present invention provides a compressor frequency control method, figure 1 is a flow chart of a compressor frequency control method according to an embodiment of the present invention, such as figure 1 As shown, the following steps S102 to S104 are included.

[0026] Step S102, comparing the detected inlet pipe temperature and outlet pipe temperature of the vapor-liquid separator with the evaporation temperature of the system where the compressor is located.

[0027] Step S104, determine the current liquid storage state of the gas-liquid separator according to the comparison result, and control the frequency of the compressor according to the current liquid storage...

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Abstract

The invention discloses a method and device for controlling the frequency of a compressor. The method includes the steps that the detected pipe inflow temperature and the detected pipe outflow temperature of a vapor-liquid separator are compared with the evaporation temperature of a system where the compressor is located; the current liquid accumulation state of the vapor-liquid separator is determined according to the comparison result, and the frequency of the compressor is controlled according to the current liquid accumulation state. According to the method, the current liquid accumulation state of the vapor-liquid separator is determined through the pipe inflow temperature and the pipe outflow temperature of the vapor-liquid separator and the evaporation temperature of the system and then the frequency of an electronic expansion valve and the frequency of the compressor are controlled according to the current liquid accumulation state so that a mixture of oil and liquid in the vapor-liquid separator can be timely transferred. Thus, the problem that when liquid in the vapor-liquid separator is too much, oil cannot return timely is solved, sufficient oil amount of the compressor is guaranteed, refrigerants return to the high pressure side timely, and heating effect is guaranteed.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to a method and device for controlling the frequency of a compressor. Background technique [0002] Vapor-liquid separator is a kind of refrigeration equipment. Its principle is to use the different density of steam and liquid particles to produce different inertial effects, so that the liquid particles carried in the return steam can be separated to prevent the compressor from sucking too much liquid particles. [0003] The gas-liquid separator is generally installed on the suction pipe of the compressor. The main function of the gas-liquid separator is to separate the liquid refrigerant from the gaseous refrigerant, and return a large amount of gaseous refrigerant to the compressor; secondly, to return the lubricating oil in the gas-liquid separator to the oil pool of the compressor. [0004] However, in related technologies, when a large amount of liquid returns to the system (fo...

Claims

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Application Information

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IPC IPC(8): F04B49/00
Inventor 傅英胜黄春宋培刚刘煜陈泽彬
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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