Control Method of Electronic Expansion Valve for Refrigerator

A technology of an electronic expansion valve and a control method, which is applied to household refrigeration devices, applications, household appliances, etc., can solve the problems of inconspicuous refrigerant superheat, inoperable electronic expansion valve, increased sensor cost, etc., so as to improve the unit refrigeration capacity. , The effect of improving the efficiency of the refrigeration cycle and reducing the energy consumption of the refrigerator

CN106322912BActive Publication Date: 2019-01-11CHANGHONG MEILING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-01-11

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Abstract

The invention discloses a control method for an electronic expansion valve for a refrigerator. The control method comprises the following steps of: starting the refrigerator and presetting parameters; keeping maximum opening of the electronic expansion valve for T1; gradually reducing opening of the electronic expansion valve until minimum opening at an existing environment temperature, and keeping the minimum opening for T2; separately performing operations according to the size of i; after stopping the refrigerator, completely closing the electronic expansion valve; and assigning a value of i+1 to i, and returning to step (2). Compared with the prior art, the control method disclosed by the invention has the advantages that: the control method is simple, degree of superheat of an evaporator or operation parameters of a compressor do not needed to be acquired, a self-regulating function of the electronic expansion valve is realized according to turn-on time, power consumption of the refrigerator is reduced, and service lives of system elements are favorably prolonged.
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Description

technical field

[0001] The invention relates to a control method for an electronic expansion valve used in a refrigerator. Background technique

[0002] With the development of refrigerators, the compressor has developed from fixed frequency to variable frequency, and the fan has developed from fixed speed to variable speed. According to the different ambient temperature and heat load of the refrigerator, the power consumption and cooling capacity of the refrigerator are constantly changing to match the Best current performance.

[0003] However, the flow rate of the capillary tube in the refrigerator is a fixed value. When the refrigerant flow rate in the system changes, such as the compressor speed flow adjustment, or in the process of lowering the evaporation temperature, the flow rate cannot be changed, and the actual cooling efficiency of the system will be compromised. The electronic expansion valve with adjustable refrigerant flow can solve this problem very well, re...

Examples

Embodiment Construction

[0037] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0038] see figure 1 , this embodiment discloses a control method for an electronic expansion valve used in a refrigerator. The maximum opening of the electronic expansion valve used in this embodiment is P max is 350 pulses, and the ambient temperature of the test is 32°C. Table 1 shows the minimum opening degree P of the electronic expansion valve corresponding to different ambient temperatures min Table 1 shows that the minimum opening degree P of the electronic expansion valve corresponding to an ambient temperature of 32°C min for 270 pulses.

[0039] Table 1 Different ambient temperature T h The minimum op...