Air source cooling and heating heat pump
An air source, cooling and heating technology, applied in the direction of heat pumps, refrigerators, refrigeration components, etc., can solve the problem of incomplete defrosting, and achieve the effect of avoiding frost on the surface of the evaporator and avoiding the reduction of heating efficiency
Pending Publication Date: 2021-03-19
ZHEJIANG AMA & HIEN TECH
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Problems solved by technology
[0004] Therefore, the technical problem to be solved by the present invention is to overcome the incomplete defrosting defect of the air source heat pump in the prior art, thereby providing an air source heating and cooling heat pump
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[0026] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...
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The invention relates to the technical field of heat pumps, in particular to an air source cooling and heating heat pump which comprises a heat exchanger, a first-stage evaporator, a first expansion valve and a second-stage evaporator which are connected in sequence, and further comprises a first compressor and a four-way reversing valve, wherein the heat exchanger communicates with an outlet endof the first compressor, the second-stage evaporator communicates with an inlet end of the first compressor, the first-stage evaporator and the second-stage evaporator are integrated equipment, a first valve port of the four-way reversing valve communicates with the outlet end of the first compressor, a second valve port of the four-way reversing valve communicates with the inlet end of the firstcompressor, a third valve port of the our-way reversing valve communicates with the heat exchanger, and a fourth valve port of the our-way reversing valve communicates with the second-stage evaporator. In the operation process of the air source heat pump, a high-pressure medium-temperature liquid refrigerant medium always flows in the first-stage evaporator, the condition that liquid water formedby condensation on the outer surfaces of the evaporators can rapidly flow downwards is ensured, and the situation that the surfaces of the evaporators frost due to the fact that the outdoor temperature is too low can be effectively avoided, and the reduction of the heating efficiency of the air source heat pump caused by frosting on the evaporators can be avoided.
Description
technical field [0001] The invention relates to the technical field of heat pumps, in particular to an air source heating and cooling heat pump. Background technique [0002] The air source heat pump is an energy-saving device that uses high-level energy to make heat flow from low-level heat source air to high-level heat source. When the air source heat pump performs heating work in the low temperature environment in winter, the surface of the evaporator of the outdoor unit of the air source heat pump, especially the bottom of the evaporator, due to the low temperature, the condensed water cannot be discharged to the outdoor surroundings in time after the unit defrosts. The water vapor in the air will quickly frost or even freeze on the surface of the evaporator. Since the cooling medium in the air source heat pump needs to exchange heat with the air at the outdoor evaporator, when the evaporator is severely frosted, the air cannot flow on the surface of the evaporator, res...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F25B30/06F25B41/40F25B41/31F25B39/00F25B43/00F25B13/00F25B47/00
CPCF25B13/00F25B30/06F25B39/00F25B43/006F25B47/00
Inventor 沈黎明郑丹庆谢金峰
Owner ZHEJIANG AMA & HIEN TECH