Overcooling heat exchange system of refrigerants under air conditioner heating circulation and air conditioner

Abstract

The invention discloses an overcooling heat exchange system of refrigerants under the air conditioner heating circulation and an air conditioner. The overcooling heat exchange system comprises an overcooling heat exchanger provided with a first refrigerant pipe and a second refrigerant pipe, the first end of the first refrigerant pipe is connected with an indoor heat exchanger, the second end of the first refrigerant pipe is connected with an outdoor heat exchanger through a first branch, the first end of the second refrigerant pipe is connected with the second end of the first refrigerant pipe through a second branch, the second end of the second refrigerant pipe is connected with a compressor, and the second branch is provided with a cooling device for cooling the corresponding internalrefrigerant. During heating, the refrigerant of the second branch enters the second refrigerant pipe after being cooled by the cooling device, the refrigerants of the two pipes have the temperature difference and can exchange heat with each other again, so that the secondary overcooling purpose is achieved, the temperature difference between the refrigerants and the outdoor low-temperature environment is enlarged, the heat exchange efficiency is improved, and the problems that in the prior art, during heating of the air conditioner, heat exchange of the refrigerants indoor is insufficient, sothat after the refrigerants undergo throttling and cooling, the temperature difference between the refrigerants and the outdoor low-temperature environment is a little low, the evaporation heat exchange effect is poor, and the heat exchange requirement during heating circulation can not be effectively met are solved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, and more specifically, relates to a subcooling heat exchange system and an air conditioner for a refrigerant under the heating cycle of an air conditioner. Background technique [0002] For conventional air conditioner equipment, it is composed of four conventional core components, namely compressor, outdoor heat exchanger, throttling device, and indoor heat exchanger. In order to improve the stability and efficiency of system operation, some auxiliary bypass settings and intelligent control systems are usually added. [0003] In the heat exchange system of the existing Variable Refrigerant Volume (VRV) air conditioner, for the refrigeration cycle, the high-temperature and high-pressure refrigerant discharged from the compressor passes through the condenser, that is, the outdoor heat exchanger for heat exchange and cooling, and then After throttling control, the temperature and pressure...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a refrigerant supercooling heat exchange system and an air conditioner under the air-conditioning heating cycle, so as to solve the problem of insufficient heat exchange of the refrigerant in the room during the air-conditioning heating cycle in the prior art, which causes the refrigerant to enter the throttling and cool down. The temperature difference with the outdoor low-temperature environment is relatively small, and the evaporation heat transfer effect is poor, and the heat exchange demand during the heating cycle cannot be effectively met.

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