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Defrosting air source heat pump system

An air source heat pump and cavity technology, applied in heat pumps, lighting and heating equipment, compressors, etc., can solve the problems of easy frosting, lack of low-level heat sources, etc., and achieve delayed frosting, large heat exchange area, and high performance. Effect

Active Publication Date: 2018-03-06
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a defrosting air source heat pump system, which aims to solve the problems of easy frosting and lack of low-level heat sources during defrosting in the prior art during the operation of air source heat pumps

Method used

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  • Defrosting air source heat pump system
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  • Defrosting air source heat pump system

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Embodiment Construction

[0026] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0027] In the description of the present invention, unless otherwise specified, "plurality" means two or more; unless otherwise specified, "notch-shaped" means a shape other than an even cross-section. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" etc. is Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and th...

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Abstract

The invention relates to a defrosting air source heat pump system. The defrosting air source heat pump system comprises a compressor, a reversing valve, a first solenoid valve, a first heat exchanger,a second solenoid valve, a first throttle mechanism, a second throttle mechanism and a second heat exchanger which are sequentially arranged on a refrigerating fluid loop; and a third heat exchangeris arranged on the second heat exchanger located outdoors in parallel. According to the defrosting air source heat pump system, on one aspect, the system successfully solves the problem about the low-position heat sources (low-grade heat energy which cannot be directly used and includes air, soil, water, solar energy, industrial waste heat and the like) during defrosting, and the problems that thedefrosting time is long and the defrosting reliability is poor due to the fact that no low-position heat sources exists during frosting are solved; and on the other aspect, the system takes heat fromthe outdoor environment, the problem that during traditional defrosting, the low temperature refrigerating fluid flows through the indoor heat exchanger, and therefore the poor thermal comfort causedby indoor environment temperature fluctuation when heat supply is recovered is solved.

Description

technical field [0001] The invention relates to the technical field of air source heat pump systems, in particular to a defrosting air source heat pump system. Background technique [0002] At present, air source heat pumps have the advantages of using inexhaustible air as a low-level heat source, taking into account heating and cooling, small footprint, energy saving, environmental protection, convenience, and a wide range of applicable regions. It also shows that the frosting problem is the main factor affecting the normal heating of heat pump units in winter, which seriously restricts the development of air source heat pumps. [0003] In recent years, many researchers at home and abroad have conducted a lot of research on the defrosting problem. The common ones are reverse cycle defrosting and hot gas bypass defrosting. The indoor unit blows cold air and turns off the indoor unit fan, resulting in the indoor heat exchanger being unable to provide sufficient heat for defr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/02F25B30/06F25B47/02
CPCF25B30/02F25B30/06F25B47/022F25B2313/02741
Inventor 胡文举金帆徐荣吉常默宁高岩
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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