Air conditioner used in high-temperature environment and control method

Abstract

The invention discloses an air conditioner used in a high-temperature environment and a control method. The air conditioner comprises a compressor, a condenser, a first throttling valve, an evaporator, a refrigerant circulating pipe and a liquid refrigerant spraying loop pipe, wherein the compressor, the condenser, the first throttling valve and the evaporator are sequentially connected with one another end to end through a refrigerant circulating pipe, so that a closed refrigerant circulating channel is formed; one end of the liquid refrigerant spraying loop pipe is communicated with a refrigerant circulating pipe between the condenser and the throttling valve; and the other end of the liquid refrigerant spraying loop pipe is communicated with a refrigerant circulating pipe between the evaporator and the compressor. The liquid refrigerant spraying loop pipe is used for mixing liquid refrigerant flowing from the condenser with gas refrigerant evaporated by the evaporator so as to reduce the air suction temperature of the compressor. Along with reduction of the air suction temperature of the compressor, the temperature of a motor in the compressor is reduced, the air exhaust temperature of the compressor is also reduced, so that the compressor can stably work in the high-temperature environment, and the refrigerating efficiency of the air conditioner is greatly improved.

Description

technical field [0001] The invention relates to the field of air conditioning and refrigeration, in particular to an air conditioner used in a high temperature environment and a control method. Background technique [0002] For an air conditioner working in a high temperature environment, the exhaust temperature of the compressor will increase with the increase of the outdoor ambient temperature, which will increase the exhaust pressure and greatly reduce the cooling efficiency of the air conditioner. In order to solve this problem, the existing air conditioner working in high temperature environment introduces an unloading bypass circuit composed of an unloading valve and a capillary tube between the condenser and the evaporator. The unloading bypass circuit is connected in parallel with the refrigeration capillary in the air conditioner. When the outdoor ambient temperature rises and the exhaust pressure of the compressor is too high, the unloading valve opens, and the re...

AI Technical Summary

Problems solved by technology

However, the air conditioner equipped with an unloading bypass circuit needs to use a high-temperature compressor to achieve cooling in a high-temperature environment, which consumes a lot of energy and the working state is unstable when the pressure is too high. The throttling cooling capacity of the bypass circuit is very small, which cannot achieve a good cooling effect

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