Energy tower air source super heat pump

Abstract

The invention provides an energy tower air source super heat pump and belongs to the field of efficient energy utilization. The system adopts an energy tower array to meet the high-power heating requirement, adopts a two-stage or multi-stage heat pump system to meet the requirement of large-range air temperature change, can work in different circulation modes under external conditions, and is suitable for different temperature working conditions respectively, thereby obviously improving the system performance, and completing equipment defrosting while continuously preparing hot water.

Description

technical field [0001] The invention belongs to the technical field of energy utilization, in particular to a heat pump unit for producing hot water with air energy. Background technique [0002] The air source heat pump can extract heat from the low-temperature outdoor air to heat the room. Since its COP (coefficient of performance) is greater than 1, 1 share of electricity can produce more than 1 share of heat, so it has significant performance compared to electric boilers and other methods. Advantage. However, limited by the structure type of the air heat exchanger and the capacity of the compressor, the heating capacity of a single air source heat pump is generally less than 500kW. When it is used in a place with a large amount of heat supply, it requires a large number of equipment, and it extracts heat from the air in winter. When hot water is taken, when the outdoor air temperature is lower than 0°C, frosting on the surface of the surface cooler is a technical proble...

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Problems solved by technology

However, limited by the structure type of the air heat exchanger and the capacity of the compressor, the heating capacity of a single air source heat pump is generally less than 500kW. When it is used in a place with a large amount of heat supply, it requires a large number of equipment, and it extracts heat from the air in winter. When hot water is taken, when the outdoor air temperature is lower than 0°C, frosting on the surface of the surface cooler is a technical problem that plagues its normal operation. The current defrosting technology mainly uses cycle reversal to switch the heating mode to In the cooling condition, the surface cooler is heated by the internal circulating working fluid, so that the continuous production of hot water cannot be guaranteed

In addition, the current technology for large-scale air source heat pumps is to use cooling towers or energy towers as the cooling source. When using cooling towers or energy towers, intermediate circulating water is required as the heat exchange medium. Because the circulating water needs to be extracted from the air first heat, and then use the air source heat pump to extract heat from the circulating water, so the two heat exchange processes cause the evaporation temperature of the air source heat pump to be much lower than the air temperature, which in turn leads to a decrease in the performance of the air source heat pump

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