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Control method and device of electronic expansion valves

An electronic expansion valve and control pair technology, which is applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve problems such as difficult decoupling of electronic expansion valves and unstable system operation

Active Publication Date: 2019-04-19
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0004] This application provides a control method and device for an electronic expansion valve to solve the problem of unstable operation of the system during the adjustment process due to the difficulty in decoupling the two electronic expansion valves in the process of controlling the compression system of the two cylinders in the related art

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  • Control method and device of electronic expansion valves
  • Control method and device of electronic expansion valves
  • Control method and device of electronic expansion valves

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0030] It should be noted that the terms "first" and "second...

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Abstract

The invention discloses a control method and device of electronic expansion valves. The control method comprises the following steps that whether a compression system runs in a parallel compression mode or not is detected; under the condition that the compression system runs in the parallel compression mode, the condensation temperature, the condenser outlet temperature and the exhaust temperatureof an exhaust port are obtained; a condenser outlet supercooling degree target value is determined according to the exhaust temperature, the adjustment of the first electronic expansion valve is controlled according to a difference value between the condenser outlet supercooling degree and the condenser outlet supercooling degree target value, wherein the condenser outlet supercooling degree is adifference value between the condensation temperature and the condenser outlet temperature; and an exhaust temperature target value is determined, and the adjustment of the second electronic expansion valve is controlled according to a difference value between the exhaust temperature and the exhaust temperature target value. By means of the control method and device, the problems that in the related art, in the control process of a double-air-cylinder compression system, due to the fact that the two electronic expansion valves are difficult to decouple, the system operation is not stable in the adjusting process is solved.

Description

technical field [0001] The present application relates to the field of compression system control, in particular, to a method and device for controlling an electronic expansion valve. Background technique [0002] Parallel compression technology means that two independent compression cylinders suck air from low pressure (evaporator) and medium pressure (flasher) respectively, and then mix and exhaust air after completing compression respectively. Since the two compression processes are independent of each other, compared with the single-stage two-stage compression, the parallel compression technology realizes the air supplement function of the two-stage compression while avoiding the mixing loss and flow loss in the single-stage two-stage compression, and improves the compressor unit. Efficiency and overall energy efficiency level. However, the parallel compression system uses dual electronic expansion valves to throttle, and there is a strong coupling between the dual elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
CPCF25B49/02F25B2600/2513
Inventor 郑波吕如兵汤康梁祥飞
Owner GREE ELECTRIC APPLIANCES INC
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