Ultra-low temperature heat pump air conditioning system

Abstract

The invention relates to an ultralow temperature heat pump air conditioning system, consisting of a compressor, a solenoid operated four-way valve, an outdoor heat exchanger, a throttle mechanism, a flash vaporization intercooler, an indoor heat exchanger and a gas-liquid separator. The air conditioning system comprises a steam injection device of the flash vaporization intercooler, and when the air conditioning system is in heating operation under ultralow temperature, the flash vaporization intercooler sprays refrigeration agent, so as to increase the inspiration capacity of the compressor and help to increase the mass flow of the refrigeration agent in a main circle, thereby increasing the heating capacity and reducing the compression ratio and the discharge temperature of the compressor. The invention has the advantages of simple structure, easy manufacture, low manufacturing cost, high efficiency, energy saving, stable and reliable operation, etc.

Description

1. Technical field [0001] The invention relates to the field of air source heat pump air conditioners, in particular to a heat pump air conditioner system with good heating effect under outdoor ultra-low temperature conditions. 2. Background technology [0002] At present, the ordinary air source heat pump air conditioners sold in the market have serious attenuation of heating capacity under the low temperature outdoor conditions, and even cannot start and run normally. In the cold regions of northern my country, they can only be used in transitional seasons. Meet basic heating needs. Therefore, traditional central heating methods are generally still used in cold regions, and these heating methods need to consume a large amount of minerals or oil, which pollutes the environment and is not economical. Now the world advocates energy saving and emission reduction. Some ultra-low temperature heat pump air-conditioning systems use frequency conversion systems or steam injection e...

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Problems solved by technology

[0002] At present, the ordinary air source heat pump air conditioners sold in the market have serious attenuation of heating capacity under the low temperature outdoor conditions, and even cannot start and run normally. In the cold regions of northern my country, they can only be used in transitional seasons. Meet basic heating needs

Therefore, traditional central heating methods are generally still used in cold regions, and these heating methods need to consume a lot of minerals or oil, which pollutes the environment and is not economical. Now the world advocates energy saving and emission reduction

Some ultra-low temperature heat pump air-conditioning systems use frequency conversion systems or steam injection enthalpy-enhancing scroll compressors, which complicate the system and increase costs. Therefore, it is necessary to develop an ultra-low temperature heat pump air conditioner with simple structure, easy manufacturing, low cost, high efficiency and energy saving system

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