Air source heat pump defrosting system used in winter
An air source heat pump, system connection technology, applied in lighting and heating equipment, damage protection, refrigeration components, etc., can solve problems such as reduction of heating capacity and heating coefficient, deterioration of heat exchange effect, and frost on the outer surface of the evaporator. , to control the frosting problem and improve the indoor heat and humidity environment.
Inactive Publication Date: 2013-04-17
TUS DESIGN GRP CO LTD
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Problems solved by technology
However, when the air source heat pump operates in winter, the economy and stability of the heat pump system are affected by the ambient temperature, and its heating capacity and heat supply coefficient decrease with the decrease of the external air ambient temperature; at the same time, when the external ambient temperature drops to When the air dew point temperature is below, frost will form on the outer surface of the evaporator, and when the outdoor temperature is lower than -10°C, the frosting phenomenon will cause deterioration of the heat exchange effect
The commonly used defrosting techniques, such as "reversing defrosting" and "electric heating defrosting", can control the frosting phenomenon of the evaporator to a certain extent, but this is at the cost of consuming a large amount of electric energy. It is found that when the ambient temperature is 0°C and the relative humidity is 70%, the power consumption due to more defrosting can reach 12% of the power consumption of the compressor
Method used
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[0029] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these examples are used to illustrate the present invention and not to limit the scope of the present invention. The implementation conditions adopted in the examples can be further adjusted according to the conditions of specific projects, and the implementation conditions not indicated are usually the conditions in routine experiments.
[0030] Such as figure 1 as shown,
[0031] The device of the air source heat pump winter defrosting system includes: compressor 1, indoor condenser 2, throttling device 3, casing heat exchanger 4, outdoor evaporator 5, buried pipe heat exchanger 6, buried pipe inlet adjustment Valve 7a, buried pipe outlet regulating valve 7b, buried pipe circulating water pump 8, indoor user-side regulating valve 9, indoor user-side water pump 10, indoor user heat exchanger or heat storage 11;
[0032] It includes the a...
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The invention discloses an air source heat pump defrosting system used in winter. The air source heat pump defrosting system used in winter is characterized by comprising a ground unit refrigerant circulation loop subsystem, a ground source hot water heat exchange circulation loop subsystem and an indoor user-side heat exchange loop subsystem, wherein one end of the ground unit refrigerant circulation loop subsystem is connected with the indoor user-side heat exchange loop subsystem to form a loop for heat exchange, and the other end of the ground unit refrigerant circulation loop subsystem is connected with the ground source hot water heat exchange circulation loop subsystem to form another loop for heat exchange. On the basis of heat pump technology and fluid heat exchange technology, the air source heat pump defrosting system used in winter not only can improve running efficiency of an air source heat pump, but also can partly solve the problem about frosting on an outdoor evaporator side of a normal air source heat pump in winter, and meanwhile is an environmental-friendly and green energy-saving heat supply system capable of utilizing low-grade heat energy for supply of daily domestic hot water and direct improvement of thermal and humid environment.
Description
technical field [0001] The invention belongs to the field of building energy saving and refrigeration engineering, and specifically relates to a system that uses geothermal energy to assist an air source heat pump to improve the winter operating performance of the air source heat pump and can automatically defrost. Background technique [0002] Air source heat pump is a heat pump air conditioning system device that realizes heat supply from low-grade heat source to high-grade heat source by inputting a small amount of high-grade heat source (electricity). Because the air source heat pump has the advantages of simple structure and low operating cost, it is widely used in modern buildings. The air source heat pump is a more energy-saving winter heating method. During the winter heating operation, the refrigerant absorbs the heat in the air on the side plate of the outdoor evaporator, and then enters the indoor condenser side after being compressed by the compressor to provide ...
Claims
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Inventor 陆建清张磊陈程
Owner TUS DESIGN GRP CO LTD