Control method of electronic expansion valve and heat pump system

A technology of electronic expansion valve and control method, which is applied to refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as insufficient heat exchange capacity of heat pump systems, and achieve the effect of increasing production costs

Active Publication Date: 2017-12-01
GREE ELECTRIC APPLIANCES INC
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AI Technical Summary

Problems solved by technology

[0002] Existing heat pump systems generally adjust the opening of the electronic expansion valve according to the degree of suction superheat to meet th

Method used

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

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Embodiment Construction

[0037] The present invention is described below based on the embodiments, and those skilled in the art should understand that the drawings provided here are for the purpose of illustration, and the drawings are not necessarily drawn to scale.

[0038] Unless the context clearly requires, throughout the specification and claims, "comprises", "comprises" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive meaning; that is, "including but not limited to" meaning.

[0039] Aiming at the problem of insufficient heat exchange capacity existing in the existing heat pump system, the application found that in figure 1 In the pressure-enthalpy diagram shown, from the above-mentioned pressure-enthalpy diagram, 1→2(2') is the evaporation process, 2(2')→3 is the compression process, 3→4(4') is the condensation process, 4( 4')→1 is the throttling process. Ts.c is the recooling temperature, the difference between the recooling temperature Ts...

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Abstract

The invention provides a control method of an electronic expansion valve and a heat pump system. The control method comprises the following step: when the current actual air suction superheat degree x of the heat pump system is within a preset range, adjusting the opening degree of the electronic expansion valve according to the current actual supercooling degree gamma of the heat pump system and the current load of a compressor. In the control method provided by the invention, the opening degree of the electronic expansion valve is adjusted according to the actual supercooling degree and the current load when the actual air suction overheat degree is within the preset range, so that the supercooling degree of the heat pump system can be matched with the actual load of the compressor. Accordingly, the heat exchange capacity and the energy efficiency of the heat pump system can be improved when the entrainment of a liquid in air suction is avoided, the own structure of the heat pump system cannot be changed, and the production cost of the heat pump system cannot be increased.

Description

technical field [0001] The invention relates to the field of automatic control of heat pump systems, in particular to a control method of an electronic expansion valve and a heat pump system. Background technique [0002] Existing heat pump systems generally adjust the opening of the electronic expansion valve according to the degree of suction superheat to meet the system reliability under different working conditions, but the existing heat pump systems still have the problem of insufficient heat transfer capacity. Contents of the invention [0003] In view of this, one object of the present invention is to provide a control method of an electronic expansion valve and a heat pump system that can improve the heat exchange capacity and energy efficiency of the heat pump system. [0004] In order to achieve the above object, on the one hand, the present invention adopts the following technical solutions: [0005] A method for controlling an electronic expansion valve. The e...

Claims

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Application Information

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IPC IPC(8): F25B41/06F25B41/34
CPCF25B2600/2513F25B41/34F25B41/31Y02B30/70
Inventor 钟海玲程琦黄凯亮刘思源刘洋李敏王朴忠
Owner GREE ELECTRIC APPLIANCES INC
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