Air conditioner injection circulation system and control method thereof

Abstract

The invention provides an air conditioner injection circulation system and a control method thereof, and the system comprises a main circulation flow path which comprises a compressor, a condenser, a switching valve, an injection port of an injector and a gas-liquid separator; the heat exchange flow path comprises an evaporator and a throttling element connected to a first opening of the evaporator, a second opening of the evaporator is communicated with the switching valve and an ejection opening of the ejector at the same time, and the end, away from the evaporator, of the throttling element is selectively communicated with the bottom of the gas-liquid separator and the switching valve; wherein the switching valve comprises a first state and a second state, in the first state, an injection opening of the injector communicates with an outlet of the condenser, and the throttling element communicates with the gas-liquid separator; and in the second state, the outlet of the condenser is communicated with the throttling element, and the injection opening of the injector is communicated with the second opening of the evaporator. According to the invention, the system can operate in different refrigeration modes according to different operation conditions, the comprehensive energy efficiency ratio of the system can be improved, and the operation stability of the system is ensured.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioning injection circulation system and a control method thereof. Background technique [0002] The invention patent with publication number CN109515115A discloses an automobile air-conditioning system and control method using carbon dioxide as a working medium, which can improve the CO 2 Automotive air conditioning refrigeration energy efficiency, improve compressor suction superheat and operational reliability. However, the refrigerant circulation path of this system is complex, and the ejector technology has difficulties in design optimization and control, and its application is not mature. [0003] The invention patent with publication number CN214172602U discloses a dual-evaporative refrigeration device coupled with solar energy injection and compression, which improves the suction pressure of the scroll compressor and the steam ejector, an...

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Problems solved by technology

[0004] Therefore, the present invention provides an air-conditioning injection cycle system and its control method, which can overcome the deficiencies of the air-conditioning injection cycle system in the prior art, such as relatively complicated system composition and control logic, high system construction costs, and low system energy efficiency.

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