Enhanced vapor injection system and control method

Abstract

The invention relates to an enhanced vapor injection system and a control method. An indoor heat exchanger, a flash evaporator, a compressor, a heat exchanger and an outdoor heat exchanger are included. A liquid outlet of the flash evaporator, the heat exchanger, the outdoor heat exchanger, an air suction port of the compressor, an exhaust port of the compressor, the indoor heat exchanger and a liquid inlet of the flash evaporator are sequentially in communication, and a first main loop is formed. The exhaust port of the compressor, the outdoor heat exchanger, the heat exchanger, the liquid outlet of the flash evaporator, the liquid inlet of the flash evaporator, the indoor heat exchanger and the air suction port of the compressor are sequentially in communication, and a second main loop is formed. The liquid outlet of the flash evaporator communicates with the air suction port of the compressor through the heat exchanger, and a first auxiliary loop is formed. An air spraying port of the flash evaporator communicates with an air supplementing port of the compressor, and a second auxiliary loop is formed. According to the provided enhanced vapor injection system and the provided control method, the heat exchange capability of the evaporation side can be effectively improved, the heating and refrigerating capability of the system is improved, and actual application requirements are met.

Description

technical field [0001] The invention relates to the technical field of air conditioning and refrigeration, in particular to an air injection enthalpy increasing system and a control method. Background technique [0002] With the strict requirements of industrial process quality and the continuous improvement of people's requirements for the comfort of living and working environments, the application of air conditioners has emerged. Air conditioning is an air conditioner (room air conditioner), which is used to adjust the temperature, humidity, cleanliness and air flow rate of the air in a room (or closed space, area) to meet the requirements of human comfort or process. As an important part of air conditioning, air conditioning units play a vital role in practical applications. [0003] The air conditioning unit is a centralized air handling system, which originated from a forced hot air heating and ventilation system that distributes heated air through air ducts where the ...

AI Technical Summary

Problems solved by technology

[0004] In order to increase the effective enthalpy of the unit system, the existing conventional air-conditioning units usually adopt a two-stage throttling control method. However, in the actual work of the unit, after the two-stage throttling, due to the reduction of the evaporation pressure, the suction volume decreases. The heat absorbed by the evaporator from the outside also decreases, and the second-stage throttling is greatly affected by the first-stage throttling, which leads to the problem of poor heating capacity of the unit

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