High-temperature air source heat pump suitable for ultra-low-temperature environment

Abstract

The invention relates to a high-temperature air source heat pump suitable for ultra-low-temperature environment and belongs to the technical field of ultra-low-temperature air source heat pumps. The high-temperature air source heat pump suitable for the ultra-low-temperature environment comprises a first air source system, a second air source system, an intermediate heat exchanger and a water tank. The first air source system and the second air source system are connected with the intermediate heat exchanger through pipelines, and the water tank is connected with the second air source system and the intermediate heat exchanger through pipelines. According to the high-temperature air source heat pump, by the adoption of a two-stage coupling system, the temperature range experienced by a refrigerant in the cycle is separated, so that the problem of the thermophysical property changes of the refrigerant at high temperature and low temperature is avoided; the first air source system adoptsair supplement to increase enthalpy, so that the heat production and energy efficiency of the air source heat pump are effectively improved, the exhaust temperature is lowered, the problem of insufficient heat supply during the first-stage compression is solved, sufficient overall heat production is ensured, and the environmental adaptability of the air source heat pump is improved.

Description

technical field [0001] The invention relates to a high-temperature air source heat pump suitable for ultra-low temperature environments, and belongs to the technical field of ultra-low temperature air source heat pumps. Background technique [0002] The water supply temperature for building heating is generally around 80°C. Due to the high temperature of the water supply, the heating process is mainly realized through urban central heating or district boilers. The application of air source heat pumps in conventional building central heating systems is still very limited. A heat pump is a device that transfers thermal energy from a low-temperature heat source to a high-temperature heat source at the cost of consuming high-quality energy. The air source heat pump can extract the low-temperature heat energy in the air, and has the characteristics of high energy efficiency, simple structure, no pollution, and easy installation. Due to these advantages of the air source heat p...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above shortcomings, thereby providing a high-temperature air source heat pump suitable for ultra-low temperature environments, which can avoid the problem of thermophysical property changes of refrigerants at high and low temperatures, and effectively improve the heating capacity and energy efficiency of air source heat pumps , reduce the exhaust temperature, solve the problem of insufficient heat supply during the first stage of compression, and ensure that the overall heating capacity is sufficient; in addition, the two operating modes of the low temperature difference and high temperature difference of the present invention solve the problem that the air source heat pump suffers from large changes in the ambient temperature The problem of unstable operation during the process improves the environmental adaptability of the air source heat pump

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