Ultra-high temperature air conditioner cooling cycle system

Abstract

The invention provides a refrigeration cycle system for ultrahigh-temperature air conditioners, which adopts a mixed working medium consisting of high-temperature refrigerant and intermediate-temperate refrigerant. The system is characterized in that a compressor, a condenser, a front-end gas-liquid separator, an expansion valve positioned at the liquid-phase outlet end of the front-end gas-liquid separator, an evaporator and a back-end gas-liquid separator are sequentially arranged in a main loop where the compressor is according to the flow direction of the refrigerant; the system is provided with an overlapping loop consisting of an evaporative condenser; an inlet of a condensing branch of the evaporative condenser is communicated with a gas-phase outlet of the front-end gas-liquid separator; an outlet of the condensing branch is connected with an inlet of the expansion valve; an inlet of an evaporation branch of the evaporative condenser is connected with a liquid-phase outlet of the front-end gas-liquid separator through a throttle control valve; an outlet of the evaporative condenser and an outlet of the evaporator are jointly connected to the back-end gas-liquid separator; and an outlet of the back-end gas-liquid separator is communicated with an inlet of the compressor. The system has the advantages that the system adopts the common air-conditioning compressor, can realize large temperature-difference refrigeration in a high-temperature environment, and has good working performance and economic performance in a wide temperature range.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner that operates in a high-temperature environment and has a wide operating temperature range for adjusting temperature and humidity. Background technique [0002] At present, the refrigeration cycle system of the air conditioner used in high temperature environment (special high temperature occasions such as iron and steel smelting workshop) is usually as follows: figure 1 As shown, it is composed of a compressor 1, a condenser assembly 2, a dry filter 3, a throttle valve 4, an evaporator assembly 5 and a gas-liquid separator 6, and a medium-temperature refrigerant or a high-temperature refrigerant is used in the system. [0003] When the ambient temperature is as high as 75°C±5°C, the refrigeration cycle system using a single medium-temperature refrigerant, the exhaust pressure and temperature are too high, the condensation temperature is close to or re...

AI Technical Summary

Problems solved by technology

[0003] When the ambient temperature is as high as 75°C±5°C, the refrigeration cycle system using a single medium-temperature refrigerant, the exhaust pressure and temperature are too high, the condensation temperature is close to or reaches the critical point, the condensation is incomplete or not, the refrigeration system cannot work normally or Cannot work, safety and reliability are difficult to guarantee

The refrigeration system using a single high-temperature refrigerant not only has the defect of too small volume cooling capacity, but also has too high compression ratio and high exhaust temperature when realizing large temperature difference refrigeration. The current technical level of air-conditioning compressors cannot meet the work requirements.

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