Control method of electronic expansion valves and heat pump system

A technology of electronic expansion valve and heat pump system, which is applied in the field of electronic expansion valve control and heat pump system, and can solve problems such as vibration of air conditioning system

Active Publication Date: 2021-03-16
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a control method of an electronic expansion valve and a heat pump system, so as to solve the problem that the control meth

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  • Control method of electronic expansion valves and heat pump system
  • Control method of electronic expansion valves and heat pump system

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Embodiment Construction

[0025] It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0026] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0027] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore,...

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Abstract

The invention provides a control method of electronic expansion valves and a heat pump system. The control method of the electronic expansion valves comprises the steps that the heat pump system is started; the current opening degree Bk of each electronic expansion valve is calculated once in the adjusting period delta T of the electronic expansion valve, and the opening degree of each electronicexpansion valve is adjusted according to the calculated current opening degree Bk, so that the actual exhaust superheat degree SH of the heat pump system is actually stabilized at the target exhaust superheat degree SH of the heat pump system; and the adjusting period delta T is actually optimized according to the actual exhaust superheat degree SH of the heat pump system in the operation process,and the current opening degree Bk is calculated according to the optimized adjusting period delta T. By means of the control method of the electronic expansion valves, the problem that the control method of the electronic expansion valve in the prior art cannot be suitable for all working conditions, and consequently an air conditioning system always oscillates at low temperature or high temperature is solved.

Description

technical field [0001] The invention relates to the field of air-conditioning equipment, in particular to a control method of an electronic expansion valve and a heat pump system. Background technique [0002] During the operation of the heat pump air conditioner, the control of the electronic expansion valve is very critical, which directly affects the reliability and economy of the entire system. At present, the electronic expansion valve is controlled by the exhaust superheat degree or the target exhaust temperature value when the heat pump air conditioner is heating; wherein, the electronic expansion valve is controlled by the exhaust superheat degree is a more common method. [0003] However, since the temperature in which the heat pump air conditioner operates may be extremely high or extremely low, in this case, the air conditioning system controlled by the exhaust superheat will oscillate and cannot be stable for a long time. At present, when the actual exhaust supe...

Claims

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Application Information

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IPC IPC(8): F25B41/31F25B30/02
CPCF25B30/02F25B2600/2513F25B2700/2104F25B2700/2106
Inventor 栾坤鹏张瀛龙苏培焕刘帅王芳邵继
Owner GREE ELECTRIC APPLIANCES INC
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