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A method for exhaust auxiliary control electronic expansion valve

An electronic expansion valve and auxiliary control technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of unit failure, electronic expansion valve inaction, and reduced unit efficiency, so as to reduce load and facilitate efficient operation , The effect of reducing the frequency of defrosting

Active Publication Date: 2017-01-25
GUANGDONG PHNIX ECO ENERGY SOLUTION
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AI Technical Summary

Problems solved by technology

[0003] 1. When the unit is running under variable conditions, the electronic expansion valve sometimes fails to operate, making the unit unable to work at an efficient working point;
[0004] 2. It makes it easy for the unit to enter the defrosting mode. Frequent defrosting of the unit not only increases the energy consumption of the unit, but also reduces the efficiency of the unit

Method used

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  • A method for exhaust auxiliary control electronic expansion valve
  • A method for exhaust auxiliary control electronic expansion valve
  • A method for exhaust auxiliary control electronic expansion valve

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Embodiment Construction

[0020] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0021] refer to figure 1 , a method for exhaust auxiliary control of an electronic expansion valve, comprising the following steps:

[0022] A. The heat pump controller calculates the actual opening of the electronic expansion valve by detecting the return air temperature of the system and the coil temperature, and then controls the electronic expansion valve;

[0023] As a further preferred embodiment, the heat pump controller controls the electronic expansion valve once every 30 seconds.

[0024] Its specific control method is as follows:

[0025] P=P 0 +△P

[0026] △P=KP*(SH 平均 -TSH)

[0027] in:

[0028] P is the actual opening of the electronic expansion valve; P 0 is the initial opening of the electronic expansion valve; △P is the variation of the opening of the electronic expansion valve;

[0029] SH 平均 is the average value of act...

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Abstract

The invention discloses a method for exhaust auxiliary control of an electronic expansion valve, which is characterized in that it comprises the following steps: the heat pump controller calculates the actual opening degree of the electronic expansion valve by detecting the return air temperature and the coil temperature of the system, and then controls the electronic expansion valve valve; the electronic expansion valve is adjusted in different ways according to the difference between the target discharge temperature and the measured discharge temperature during the period of 3-10 minutes and 10 minutes after the compressor is started. On the basis of the original superheat control, the method of the present invention automatically assists in adjusting the opening according to the exhaust gas temperature, so that the heat pump system always works efficiently, and solves the problem that the electronic expansion valve does not perform corresponding actions when the unit changes working conditions; and by adjusting The setting of the time interval effectively prolongs the defrosting time of the unit, reduces the defrosting frequency of the unit, and is beneficial to the efficient operation of the heat pump system. The invention can be widely used in the field of heat pump control as a method for assisting exhaust gas to control the electronic expansion valve.

Description

technical field [0001] The invention relates to the field of heat pump control, in particular to a method for exhaust auxiliary control of an electronic expansion valve. Background technique [0002] The traditional heat pump system usually adjusts the electronic expansion valve according to the single superheat degree of the system. The control method is to calculate the actual opening degree of the electronic expansion valve by detecting the return air temperature and the coil temperature of the system, and then control the electronic expansion valve to perform corresponding actions. The controller controls the electronic expansion valve every 30s to act according to the current calculated actual opening, but such a control method still has the following problems during use: [0003] 1. When the unit is running under variable conditions, the electronic expansion valve sometimes fails to operate, making the unit unable to work at an efficient working point; [0004] 2. It ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02F25B41/06F25B41/34
CPCF25B49/02F25B41/30Y02B30/70
Inventor 张东乾高翔刘远辉唐文晖
Owner GUANGDONG PHNIX ECO ENERGY SOLUTION
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