Ground-source heat pump system allowing refrigerant to directly exchange heat with soil

Abstract

The invention relates to a ground-source heat pump system allowing refrigerant to directly exchange heat with soil. The ground-source heat pump system comprises a compressor, a four-way valve, a user side heat exchanger, a throttling mechanism and a ground-source side efficient heat exchange device. The outlet of the compressor is connected with the first end of the four-way valve. The inlet of the compressor is connected with the second end of the four-way valve. The third end of the four-way valve, the user side heat exchanger, the throttling mechanism, the ground-source side efficient heat exchange device and the fourth end of the four-way valve are sequentially connected. The ground-source side efficiency heat exchange device is embedded in soil. By means of the ground-source heat pump system, the number of embedded pipes can be greatly decreased, and the defects that the ground-source heat pump well digging area is not enough, the number of dug wells is large, and the earlier-stage construction cost is high can be effectively overcome. The ground-source heat pump system is small in area occupied by dug wells, simple in structure, low in cost, reliable in performance, high in heat exchange efficiency and high in overall energy efficacy ratio.

Description

technical field [0001] The invention belongs to the field of refrigeration heat pumps, and relates to a ground source heat pump system in which refrigerant and soil directly exchange heat. Background technique [0002] In today's society, with the development of industry and the improvement of people's living standards, energy is becoming more and more tense, and people's requirements for indoor temperature are getting higher and higher. The market for artificial indoor temperature regulation is getting bigger and bigger, but the energy shortage makes energy costs also increase. , and put forward higher requirements for energy saving and high efficiency of air conditioners. [0003] The use of "ground source heat pump" system is a globally recognized emerging technology for energy saving, high efficiency and environmental protection, which can realize cooling in summer, heating in winter and domestic hot water throughout the year. However, conventional ground source heat pu...

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Problems solved by technology

However, conventional ground source heat pump systems require a relatively large area to drill wells, especially in today's urban development, the efficient use of land is more important

Secondly, the heat transfer mode of the conventional ground source heat pump system is that the refrigerant exchanges heat with the cold medium, and the cold medium then exchanges heat with the soil. The thermal resistance of heat exchange reduces the use efficiency of soil energy, increases the work of the compressor, increases the work of the ground source heat pump, and increases the cost of well drilling and the initial investment cost of the ground source heat pump system

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