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No-frosting air source heat pump system

An air source heat pump and frosting technology, which is applied in air conditioning systems, heat pumps, space heating and ventilation, etc., can solve the problems of low heating efficiency, discontinuous heating, and repeated defrosting, so as to prolong the service life and avoid repeated defrosting. The process of defrosting and the effect of reducing the pressure ratio

Inactive Publication Date: 2021-01-29
杨吉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems of repeated defrosting, discontinuous heating, large compression ratio and low heating efficiency caused by frosting of common air source heat pumps, and provides a non-frosting air source heat pump system

Method used

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  • No-frosting air source heat pump system
  • No-frosting air source heat pump system

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] A non-frosting air source heat pump system includes a heating cycle at a low-temperature end and a heating cycle at a high-temperature end. The heating cycle at the low temperature end is an open compressed air heating cycle; the heating cycle at the low temperature end is that the filter 8 is connected to the compressor one 1 through the pipeline, and the compressor one 1 is connected to the intermediate heat exchanger 2 through the pipeline, and the intermediate heat exchanger 2 is connected to the expansion device 7 through pipelines, the input shaft of the compressor 1 is directly mechanically connected to the main shaft of the expansion device, and the air side of the intermediate heat exchanger is provided with a condensate discharge device 6; the high-temperature heating cycle is closed-type wet vapor compression heating Cycle; the high-temperature heating cycle is connected in sequence by the intermediate heat exchanger 2, the second compressor 3, the condenser 4...

Embodiment 2

[0039] A heat pump system with air source in winter and water cooling in summer, including a heating cycle at a low-temperature end and a heating cycle at a high-temperature end. The heating cycle at the low temperature end is an open compressed air heating cycle; the heating cycle at the low temperature end is that the filter 8 is connected to the compressor one 1 through the pipeline, and the compressor one 1 is connected to the intermediate heat exchanger 2 through the pipeline, and the intermediate heat exchanger 2 is connected to the expansion device 7 through pipelines, the input shaft of the compressor 1 is directly mechanically connected to the main shaft of the expansion device, and the air side of the intermediate heat exchanger is provided with a condensate discharge device 6; the high-temperature heating cycle is closed-type wet vapor compression heating Cycle; the high-temperature heating cycle is connected in sequence by the intermediate heat exchanger 2, the seco...

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Abstract

The invention provides a no-frosting air source heat pump system. The no-frosting air source heat pump system comprises an intermediate heat exchanger, wherein the intermediate heat exchanger is respectively connected with a first compressor and an expansion device through pipelines to form a low-temperature end heating cycle; the intermediate heat exchanger is sequentially connected with the second compressor, a condenser and a throttling expansion device through pipelines to form a high-temperature end heating cycle; the low-temperature end heating cycle and the high-temperature end heatingcycle are connected in series; the low-temperature end heating cycle is an open type compressed air heating cycle; the high-temperature end heating cycle is a wet steam compression heating cycle; andthe low-temperature end heating cycle and the high-temperature end heating cycle exchange heat through the common intermediate heat exchanger. The no-frosting air source heat pump system has the advantages that the evaporation temperature of the high-temperature heating cycle is controlled to be higher than the freezing point temperature of water at the pressure of the intermediate heat exchanger;and a water solidification phenomenon can be enabled not to be generated in the two-stage compression heating cycle, so that no-frosting operation of the air source heat pump system is really achieved.

Description

technical field [0001] The invention relates to the technical field of air-source heat pump heating, and more particularly, relates to a frost-free air-source heat pump system. Background technique [0002] The air source heat pump uses air as a low-temperature heat source for heating, and is an efficient, environmentally friendly, and energy-saving heating device. With the increasing awareness of environmental protection and the continuous advancement of the national coal-to-electricity policy, the application of air source heat pumps is becoming more and more widespread. [0003] There are two prominent problems in the application of air source heat pumps: [0004] One problem is the frosting of the evaporator. The air contains a small amount of water vapor. When the temperature of the evaporator of a conventional air source heat pump is lower than 0°C, frosting occurs on the outer surface of the evaporator. Frosting will cause the evaporating temperature to continue to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/10F25B13/00F25B30/06F25B41/20F25B47/00F25B49/02F24F5/00
CPCF24F5/001F25B1/10F25B13/00F25B30/06F25B47/006F25B49/02
Inventor 杨吉
Owner 杨吉
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