Control method and device for electronic expansion valve, and electronic equipment

A technology of an electronic expansion valve and a control method, which is applied in the field of electric power, can solve the problems of precise control, difficulty in realizing the opening degree of the electronic expansion valve, and large changes in the degree of subcooling, and achieves the effect of realizing the opening degree.

Inactive Publication Date: 2018-09-04
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the degree of subcooling is generally used to control the opening degree of the electronic expansion valve. However, since the degree of subcoo

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  • Control method and device for electronic expansion valve, and electronic equipment
  • Control method and device for electronic expansion valve, and electronic equipment
  • Control method and device for electronic expansion valve, and electronic equipment

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[0032] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0033] In order to clearly explain the control method and device of the electronic expansion valve according to the embodiment of the present invention, the working principle of the existing automobile air conditioning system will be described below. figure 1 It is a schematic diagram of the existing automobile air conditioning system, such as figure 1 As shown, the refrigerant is compressed by the compressor, flows through the condenser, the electronic expansion valve and the indoor heat exchanger in s...

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Abstract

The invention discloses a control method and device for an electronic expansion valve, and electronic equipment. The control method for the electronic expansion valve comprises the following steps: acquiring the actual value of an exhaust pressure at the outlet of a compressor; subtracting the actual value of the exhaust pressure at the outlet of the compressor by the given value of the exhaust pressure at the outlet of the compressor to obtain an error signal; adjusting the error signal to obtain an adjustment signal; and controlling the opening degree of the electronic expansion valve to stabilize the opening degree of the electronic expansion valve in a set range according to the adjustment signal. According to the embodiment of the invention, the opening degree of the electronic expansion valve is adjusted to be stabilized in the set range according to the error signal between the given value of the exhaust pressure at the outlet of the compressor and the acquired actual value of the exhaust pressure at the outlet of the compressor, so that accurate control for the opening degree of the electronic expansion valve is realized.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a control method, device and electronic equipment for an electronic expansion valve. Background technique [0002] At present, the automotive air-conditioning system uses electronic expansion valves for phase change (liquid state, gas state conversion) conversion, thereby transferring heat. By controlling the opening of the electronic expansion valve, the discharge pressure at the outlet of the compressor and the phase change conversion efficiency of the system can be controlled. [0003] In the prior art, the degree of subcooling is generally used to control the opening degree of the electronic expansion valve. However, since the degree of subcooling of the heat pump system varies greatly at extremely low temperatures, it is difficult to precisely control the degree of opening of the electronic expansion valve. Contents of the invention [0004] The present invention ...

Claims

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Application Information

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IPC IPC(8): F25B49/02F25B41/06F24F11/64F24F11/70F25B41/34
CPCF24F11/64F24F11/70F25B49/02F25B2600/2513F25B2700/1931F25B41/31Y02B30/70
Inventor 周罕华
Owner BEIJING ELECTRIC VEHICLE
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