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Method for controlling electronic expansion valve of air cooling unit

An electronic expansion valve and air cooler technology, applied in the field of air-conditioning expansion valve, can solve the problems of high suction superheat, affecting the overall performance of the unit, poor system follow-up, etc., and achieve the optimal system mass flow, the best system energy, Reduce the effect of oscillation

Active Publication Date: 2017-02-15
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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Problems solved by technology

[0003] In view of this, in order to solve the problem in the prior art that the suction superheat is too high and too low oscillation causes the electronic expansion valve and the system to follow poorly and affect the overall performance of the unit, the purpose of the present invention is to propose an electronic Expansion valve control method

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  • Method for controlling electronic expansion valve of air cooling unit
  • Method for controlling electronic expansion valve of air cooling unit
  • Method for controlling electronic expansion valve of air cooling unit

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[0073] Table 1 and Table 2 are the correspondence tables of superheat degrees under cooling and heating modes respectively, which can be preset in the system at the factory, or manually set through the operation interface; according to Table 1 and Table 2, it can be determined The corresponding superheat target value T;

[0074] Table 1 Correspondence table of superheat degree in cooling mode

[0075] Segmentation principle Superheat target value T(K) 18～53℃ 5

[0076] Table 2 Correspondence table of superheat degree in cooling mode

[0077] Segmentation principle Superheat target value T(K) Ta≥5℃ 5 Ta 2

[0078] Table 3 is a comparison table of the initial opening of the electronic expansion valve, which is used for the unit system to determine the initial opening of the electronic expansion valve according to the current operating mode, ambient temperature Ta and return water temperature Tewi;

[0079] Table 3 is the compar...

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Abstract

A method for controlling an electronic expansion valve of an air cooling unit includes adjusting the open degree of the electronic expansion valve according to operation parameters and the operation trend during operation. The effects of the method are that the air cooling unit can determine the fact that the electronic expansion valve is at a reasonable valve regulation initial open degree in different working conditions; during operation, over regulation of the electronic expansion valve can be avoided, and vibration can be relieved; and the electronic expansion valve can rapidly match a system, mass flow rate of the system is optimized, an optimal working state of a compressor of the unit can be ensured, and the best performance of the system can be achieved.

Description

technical field [0001] The invention relates to an air-conditioning expansion valve, in particular to an electronic expansion valve control method of an air-cooled unit. Background technique [0002] In air-conditioning equipment, the method of controlling the suction superheat of the compressor is usually used to adjust the opening or closing of the electronic expansion valve inside the air-conditioning equipment, so that the equipment can operate normally. Generally, when the actual suction superheat is greater than the superheat target value, the opening of the electronic expansion valve increases; when the actual suction superheat is lower than the superheat target value, the electronic expansion valve opening decreases; the actual suction superheat is equal to the superheat When the heat target value is reached, the opening degree of the electronic expansion valve remains unchanged. At present, the control of the suction superheat of the electronic expansion valve need...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
Inventor 董俊杰赵雷张捷贺雪飞谢吉培
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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