Electronic expansion valve control method, control system and heat pump system
A technology of electronic expansion valve and control method, which is applied in the directions of heat pump, refrigeration and liquefaction, lighting and heating equipment, etc. It can solve the problems of large fluctuations in the electronic expansion valve system and inaccurate adjustment process, and achieve the improvement of heating capacity and energy efficiency , precise adjustment, and improved reliability
Active Publication Date: 2019-09-20
HEFEI MIDEA HEATING & VENTILATING EQUIP +1
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Problems solved by technology
[0002] Due to many advantages such as easy adjustment and wide application range, electronic expansion valves have been widely used in refrigeration and heat pump systems. The size of the electronic expansion valve can be adjusted to increase or decrease the opening degree of the electronic expansion valve, but the adjustment process is mostly inaccurate, which may easily cause the problem of large system fluctuations during the adjustment process of the electronic expansion valve.
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[0160] Concrete embodiment: concrete working steps are as follows:
[0161] Step 1: After the heat pump system is turned on and running, obtain the initial ambient temperature T 初环境 and the initial water temperature T in the tank 初水温 ;
[0162] Step 2: According to the initial ambient temperature T 初环境 and initial water temperature T 初水温 Determine the initial opening value a1 of the electronic expansion valve; if T 环境1 初环境 环境2 ,T 水箱1 初水温 水箱2 , as shown in Table 1, the initial opening of the electronic expansion valve is a 11 , according to the initial ambient temperature T 初环境 and initial water temperature T 初水温 For the corresponding interval, determine the corresponding initial opening value a1 of the electronic expansion valve.
[0163] Table 1 The opening value table corresponding to the initial ambient temperature range and the initial water temperature range
[0164]
[0165] Step 3: Obtain the inlet temperature T of the evaporator 入口 and outlet temperature T...
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The present invention proposes a control method, control system and heat pump system of an electronic expansion valve, wherein the control method of the electronic expansion valve includes: determining the initial opening value of the electronic expansion valve according to the initial ambient temperature and the initial water temperature; The parameter determines the number of adjustment steps for the opening of the electronic expansion valve; determines the first correction coefficient of the opening of the electronic expansion valve according to the ambient temperature and water temperature; corrects the number of adjustment steps according to the first correction coefficient to determine the actual opening value of the electronic expansion valve . The controller of the electronic expansion valve provided by the present invention solves the problem of large fluctuations in the system during the adjustment process of the electronic expansion valve, makes the adjustment of the electronic expansion valve more accurate, improves the heating capacity and energy efficiency of the system, and improves the reliability of the heat pump system. sex.
Description
technical field [0001] The invention relates to the field of heat pump system control, and more specifically, to a control method, a control system and a heat pump system for an electronic expansion valve. Background technique [0002] Due to many advantages such as easy adjustment and wide application range, electronic expansion valves have been widely used in refrigeration and heat pump systems. The size of the electronic expansion valve can be used to increase or decrease the opening of the electronic expansion valve, but the adjustment process is mostly inaccurate, which may easily cause the problem of large system fluctuations during the adjustment process of the electronic expansion valve. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. [0004] Therefore, the first aspect of the present invention is to provide a control method for an electronic expansion valve. ...
Claims
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IPC IPC(8): F25B30/00F25B49/00F24H9/20
Inventor 曾智力汤昌靖卫鹏云
Owner HEFEI MIDEA HEATING & VENTILATING EQUIP