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Control method and device for electronic expansion valve as well as air conditioner

An electronic expansion valve and control method technology, applied in heating and ventilation control systems, heating methods, space heating and ventilation, etc., can solve problems such as affecting comfort, poor heat exchange, and difficulty in rapid response to electronic expansion valve adjustment methods. , to achieve precise control, avoid downtime failures, and improve comfort

Active Publication Date: 2020-09-15
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem solved by the invention is that the current electronic expansion valve adjustment method is difficult to respond quickly, resulting in poor heat exchange and affecting comfort

Method used

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  • Control method and device for electronic expansion valve as well as air conditioner
  • Control method and device for electronic expansion valve as well as air conditioner
  • Control method and device for electronic expansion valve as well as air conditioner

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Embodiment Construction

[0029] In order to better adjust the refrigerant conversion efficiency, the current air conditioning system usually uses an electronic expansion valve to adjust the flow size and rate of the refrigerant to ensure the heat transfer performance of the system. However, a common way to adjust the size of the electronic expansion valve is to periodically adjust it based on the target suction superheat. At this time, when the operating frequency of the compressor changes suddenly, or the system pressure is too high, it cannot respond quickly, which will cause heat transfer. Bad, affecting comfort.

[0030] In order to improve the above technical problems, the embodiments of the present invention provide a control method and device for an electronic expansion valve, and an air conditioner, which can adjust the opening of the electronic expansion valve according to the target suction superheat degree, exhaust temperature, and compressor frequency changes. When the frequency of the com...

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Abstract

The embodiment of the invention provides a control method and device for an electronic expansion valve as well as an air conditioner, and relates to the technical field of air conditioners. The control method comprises the following steps: obtaining current opening degree of the electronic expansion valve of the air obtainer after the air conditioner is in heating operation for first preset time;calculating a target suction gas superheat control opening degree, a gas exhaust temperature correcting control opening degree and a compressor frequency change control opening degree of the electronic expansion valve; calculating a target opening degree of the electronic expansion valve: P target opening degree=P0+DeltaP1+DeltaP2+DeltaP3, wherein P target opening degree is target opening degree,P0 is current opening degree, DeltaP1 is target suction gas superheat control opening degree, DeltaP2 is gas exhaust temperature correcting control opening degree and DeltaP3 is compressor frequency change control opening degree; and controlling and regulating the electronic expansion valve to the target opening degree. The method is more precise in control, can quickly regulate the opening degreeof the electronic expansion valve, achieves system balance, and avoids shutdown faults caused by too great system pressure.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a control method and device for an electronic expansion valve and an air conditioner. Background technique [0002] In order to better adjust the refrigerant conversion efficiency, the current air conditioning system usually uses an electronic expansion valve to adjust the flow size and rate of the refrigerant to ensure the heat transfer performance of the system. However, a common way to adjust the size of the electronic expansion valve is to periodically adjust it based on the target suction superheat. At this time, when the operating frequency of the compressor changes suddenly, or the system pressure is too high, it cannot respond quickly, which will cause heat transfer. Bad, affecting comfort. Contents of the invention [0003] The problem solved by the invention is that the current electronic expansion valve adjustment method is difficult to respond quickly, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/61F24F11/84F24F11/86F24F110/12F24F140/12F24F140/20F24F140/50
CPCF24F11/61F24F11/64F24F11/84F24F11/86F24F2110/12F24F2140/12F24F2140/20F24F2140/50
Inventor 胡立志王知恒送林林
Owner NINGBO AUX ELECTRIC
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