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Air source heat pump water heating unit capable of achieving continuous heating

A technology of air source heat pump and hot water unit, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems affecting the reliability of the heat pump system, complicated solenoid valve control, etc., to improve the defrosting efficiency and performance, improve the The effect of defrosting efficiency and improving stability

Active Publication Date: 2017-09-01
NANJING UNIV OF SCI & TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

In this system, when the two evaporators defrost alternately, it is necessary to adjust the energy of the compressor load to adapt to the evaporator load. If there is no reliable means of energy adjustment, the evaporation pressure will be too low, which will affect the reliability of the entire heat pump system operation, and will cause excessive heat loss. Multiple solenoid valves complicate control

Method used

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  • Air source heat pump water heating unit capable of achieving continuous heating
  • Air source heat pump water heating unit capable of achieving continuous heating
  • Air source heat pump water heating unit capable of achieving continuous heating

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Embodiment Construction

[0018] Such as figure 1 As shown, the continuous heating air source heat pump hot water unit of the present invention includes a water-cooled condenser 7, a first compressor 1, a second compressor 3, an air-cooled first evaporator 12, and an air-cooled second evaporator 14 , the first throttle valve assembly 11 and the second throttle valve assembly 10, further comprising a third one-way valve 9, a first four-way reversing valve 8 and a second four-way reversing valve 13, the first compressor 1. The exhaust port communicates with the inlet of the condenser 7 through the first one-way valve 5. The exhaust port of the second compressor 3 communicates with the inlet of the condenser 7 through the second one-way valve 4. The first four-way reversing valve 8 The first port 8-1 of the first four-way reversing valve 13 is connected to the second port 13-2, the second port 8-2 of the first four-way reversing valve 8 is connected to the outlet of the condenser 7, and the first four-way...

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Abstract

Disclosed is an air source heat pump water heating unit capable of achieving continuous heating. The air source heat pump water heating unit capable of achieving continuous heating comprises a water-cooling condenser (7), two compressors (1 and 3), two air-cooling type evaporators (12 and 14) and two throttling valve assemblies (11 and 10), and further comprises three one-way valves (4, 5 and 9) and two four-way reversing valves (8 and 13). Each compressor, the corresponding evaporator and the corresponding throttling valve assembly are combined to form an evaporation and compression set in an interlocking control mode, alternative defrosting operation is achieved by the two evaporation and compression sets through organic switchover of the four-way reversing valves, and therefore the heating process can be continuous and stable, operation is reliable, and the defrosting energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of air source heat pumps, in particular to an air source heat pump hot water unit for continuous heating with simple structure, simple and reliable control, and low energy consumption. Background technique [0002] In the middle and lower reaches of the Yangtze River in my country, when the air source heat pump operates under low outdoor conditions, when the surface temperature of the outdoor heat exchanger is lower than the ambient air dew point temperature and lower than 0°C, frost will form on the surface of the heat exchanger. Frosting on the surface of the evaporator will increase the heat transfer resistance of the outdoor heat exchanger and reduce the area of ​​the air circulation channel, resulting in a decrease in the ventilation volume of the outdoor heat exchanger, which will eventually lead to a decrease in the heating capacity of the heat pump unit, a decrease in heating performance, and even a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H4/02F24H9/00F24H9/20F25B47/02
CPCF24H4/02F24H9/0005F24H9/2007F25B47/022F25B2347/023
Inventor 余延顺陈杰
Owner NANJING UNIV OF SCI & TECH
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