Carbon dioxide air-conditioning system and gas-liquid separator thereof

Abstract

The invention provides a carbon dioxide air-conditioning system and a gas-liquid separator thereof. The gas-liquid separator is provided with a low-temperature low-pressure pipeline and a high-temperature high-pressure pipeline, wherein the low-temperature low-pressure pipeline communicates with a compressor, and heat exchange is conducted between the high-temperature high-pressure pipeline and the low-temperature low-pressure pipeline. Both the low-temperature low-pressure pipeline and the high-temperature high-pressure pipeline are arranged independently. The high-temperature high-pressure pipeline is arranged spirally. The low-temperature low-pressure pipeline is inserted in a cylinder cavity formed by the spiral high-temperature high-pressure pipeline. As the high-temperature high-pressure pipeline and the low-temperature low-pressure pipeline of the gas-liquid separator are arranged independently, the gas-liquid separator can be technologically and easily obtained, the structure is simple, and the phenomenon of pipeline leakage is avoided; in addition, compared with the prior art, the space of the spiral cylinder cavity is utilized by the low-temperature low-pressure pipeline, so that under the conditions of the same spiral radius and the same spiral pipeline radius, the flow of a high-temperature high-pressure refrigerant is larger; and moreover, a low-temperature low-pressure refrigerant in the whole inner cavity can also participate in heat exchange, and thus a better heat exchange effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a carbon dioxide air conditioning system and a gas-liquid separator. Background technique [0002] In the automotive air conditioning system, the compressor only compresses the gaseous refrigerant. If a large amount of liquid refrigerant is sucked into the compressor, the compressor will be damaged and the system will be scrapped. Therefore, in the prior art, a gas-liquid separator is often installed between the evaporator and the compressor. [0003] The working principle of the gas-liquid separator is: the gas-liquid two-phase refrigerant coming out of the evaporator enters the gas-liquid separator. Under the action of gravity, the liquid refrigerant sinks and the gas refrigerant rises; The outlet end of the low-pressure pipeline is connected to the outside of the gas-liquid separator, and the inlet port is exposed to the inner cavity of the upper part of the gas-liqu...

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Problems solved by technology

[0009] In order to realize heat exchange, the pipes used for flowing low-temperature and low-pressure refrigerants and high-temperature and high-pressure refrigerants are designed with sleeves. This kind of structure is complicated and requires too much technology, so it is difficult to produce qualified products. The inner pipe body 151b and the outer pipe Leakage easily occurs between bodies 151a

[0010] In addition, the high-temperature and high-pressure inlet pipe, high-temperature and high-pressure outlet pipe, low-temperature and low-pressure inlet pipe, and low-temperature and low-pressure outlet pipe are all inserted into the head 125 of the gas-liquid separator, which is inconvenient to install and has poor sealing performance.

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