Heat pump system and electronic expansion valve control method
An electronic expansion valve, controller technology, used in heat pumps, refrigerators, refrigeration components and other directions
Pending Publication Date: 2021-12-21
BEIJING JINMAO GREEN BUILDING TECH CO LTD
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Problems solved by technology
[0005] In view of this, the present invention aims to propose a heat pump system and an electronic expansion valve control method to solve the problem in the prior art that it is difficult to keep the heat pump system in an efficient and stable operating state
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[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the scope of protection of this application.
[0025] The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "...
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The invention discloses a heat pump system and an electronic expansion valve control method. The heat pump system comprises a controller, a compressor, a main path electronic expansion valve and an auxiliary path electronic expansion valve, and the controller controls the main path electronic expansion valve through a main path control strategy and controls the auxiliary path electronic expansion valve through an auxiliary path control strategy, the response speed of the main path electronic expansion valve and the auxiliary path electronic expansion valve is increased, meanwhile, whether a main path operation state is abnormal or not is determined through a suction superheat degree, whether an auxiliary path operation state is abnormal or not is determined through an exhaust superheat degree, and the main path operation state and the auxiliary path operation state are judged more accurately; different main path control strategies can be selected for the main path according to whether the main path is abnormal or not, different auxiliary path control strategies can be selected for the auxiliary path according to whether the auxiliary path is abnormal or not, judgment of the main path operation state and judgment of the auxiliary path operation state are mutually independent, and the response speed of the main path electronic expansion valve and the auxiliary path electronic expansion valve is further increased; and the stability and efficiency of the heat pump system are improved.
Description
technical field [0001] The invention relates to the technical field of air conditioning, in particular to a heat pump system and an electronic expansion valve control method. Background technique [0002] With the development of science and technology and the improvement of energy saving and emission reduction requirements, heat pump systems are rapidly occupying the market by virtue of their high energy efficiency. [0003] In a traditional heat pump system, the main circuit electronic expansion valve is usually installed in the main circuit. Firstly, the suction superheat degree of the compressor suction port is determined, and the opening degree of the main electronic expansion valve is controlled according to the suction superheat degree. At the same time, the auxiliary circuit is set The thermal expansion valve uses the characteristics of different openings of the thermal expansion valve at different degrees of superheat to control the opening of the auxiliary circuit. ...
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IPC IPC(8): F25B49/02F25B41/34F25B30/02
CPCF25B49/02F25B41/34F25B30/02Y02B30/70
Inventor 刘乾坤朱龙华王鹏李鹏飞张超
Owner BEIJING JINMAO GREEN BUILDING TECH CO LTD