Double-efficient carbon dioxide air conditioner heat pump system

Abstract

The invention discloses a double-efficient carbon dioxide air conditioner heat pump system which adopts natural and environment-friendly carbon dioxide as a refrigerant and has a refrigerating working mode and a heating working mode. The system has two evaporation temperatures in the refrigerating mode, refrigerant pressure energy in a high-pressure pipeline is recovered through an ejector, part of refrigerant liquid in a gas-liquid separator is injected to achieve low-temperature refrigeration, and the purposes of realizing independent dehumidifying, recycling part of compression work, reducing power consumption of a compressor and improving refrigeration efficiency are achieved. In the heating mode, high-temperature exhaust of the compressor sequentially enters a second indoor heat exchanger and a first indoor heat exchanger, countercurrent flow heat exchange of the high-temperature exhaust and indoor air is achieved, heat exchange is sufficient, the heating capacity of the system is improved, and the purpose of efficient heating is achieved. Therefore, the whole system can realize double high-efficiency refrigeration and heating.

Description

technical field [0001] The invention belongs to the field of air conditioning, and more specifically relates to a double high-efficiency carbon dioxide air conditioning heat pump system. Background technique [0002] Refrigeration and air conditioning systems are widely used in various refrigeration and air conditioning occasions. Traditional air-conditioning system refrigerants use freon or hydrocarbon refrigerants. The former is restricted by the "Montreal" and the "Paris Agreement" on climate change due to the ozone layer or global warming effects. The system has the advantages of good compatibility and high energy efficiency ratio, but it has the disadvantage of flammability. At the same time, compared with the refrigeration and air conditioning system with carbon dioxide as the refrigerant, the heating capacity of the traditional air conditioning system is low. As an environmentally friendly and safe refrigerant, carbon dioxide is non-flammable, has no ODP effect, extr...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a dual high-efficiency carbon dioxide air-conditioning system, thereby solving the technical problem of low efficiency of the existing air-conditioning system

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