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Air-source heat-pump air heater adopting parallel-type evaporator

An air source heat pump and evaporator technology, which is applied to compressors, compressors, refrigerators, etc. with multiple evaporators, can solve the problems of inability to meet people's heating requirements, high operating costs of electric heating, and waste of electric energy. Achieve the effect of favoring water evaporation, improving heat transfer capacity and improving energy efficiency ratio

Inactive Publication Date: 2011-01-05
湖南省浏阳市择明热工器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the ambient temperature is 2°C, its energy efficiency ratio is only about 0.8, which cannot meet people's heating requirements. It can only rely on electric auxiliary heating to meet people's heating requirements, resulting in a large waste of electric energy.
[0004] In people's production and life, there are many drying activities that require drying of materials at around 40-72 °C. Using coal and oil boilers for heating wastes energy and pollutes the environment.
The operating cost of electric heating is high, the energy efficiency ratio is only close to 0.9, and the waste of electric energy is serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: In order to illustrate the actual effect of the present invention, at an ambient temperature of 7° C., the air source heat pump air blower is used to heat the drying room provided with the heat preservation layer by means of circulating air. Dimensions of drying room: length 4.92m, width 3.64m, height 2.2m; total rated power of air source heat pump fan unit is 5.37kw, compressor power is 4.68kw, condenser fan power is 0.37kw, evaporator fan is 0.3kw, condenser heat exchange Area 37.5m 2 , the working medium is 417A.

[0022] Adopt a set of heat exchange area of ​​32.8m 2 evaporator, the temperature in the drying room can only reach 50°C; add a set of heat exchange area of ​​30.8m 2 The evaporator absorbs heat, and the temperature of the drying room reaches 64°C.

Embodiment 2

[0023] Example 2: Use an air source heat pump to heat, and bake the middle tobacco leaves at an ambient temperature of 25°C-36°C. The specifications of the drying room are: length 4.2m, width 2.7m, height 3.4m, and a condenser fan with a power of 1.5KW Advanced two-speed suction fan, compressor input power 6KW, evaporator area 36m 2 , the evaporator fan is 250W, and the heat exchange area of ​​the condenser is 48.6m 2 , The baking time is 104 hours, the power consumption is 531 degrees, the dried tobacco leaves are 155kg, and the power consumption for drying one kilogram of dry tobacco leaves is 3.42 degrees / kg.

[0024] In order to compare the effects of the above inventions, under the same drying room conditions, only resistance elements are used to generate heat for heating, the baking time is 102 hours, the power consumption reaches 923 degrees, the dried tobacco leaves are 156kg, and the power consumption for baking one kilogram of dry tobacco leaves is 6.23 degrees / kg. ...

Embodiment 3

[0027] Example 3: In order to test the heating effect under different ambient temperatures, the air source heat pump adopting the above technical solution was placed in the freezer for experiments. The input power of the air source heat pump compressor was 5.75kw, and the total power of the whole machine was 6.3kw. The heat exchange area of ​​the first group of evaporators is 49.5m 2 , the heat exchange area of ​​the second group of evaporators is 46m 2 , the heat exchange area of ​​the third group of evaporators is 41.4m 2 , condenser heat exchange area 44.8m 2 , the air volume at the air outlet is 5450m 3 / h. In order to eliminate the interference of circulating heating on the experimental data, the condenser and its fan were placed in an empty workshop outside the freezer, and the ambient temperature was 35°C. The experimental results are as follows:

[0028] 1. When the temperature of the freezer is 6°C, only the first group of evaporators is activated, and the temper...

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Abstract

The invention discloses an air-source heat-pump air heater adopting a parallel-type evaporator, comprising an air source heat pump and a condenser fan. The evaporator of the air source heat pump comprises a group of working evaporators and at least one group of spare evaporators, the refrigerant input ends and the refrigerant outputs of the evaporators are connected in parallel by a manifold, the refrigerant input ends of the spare evaporators are controlled by an electromagnetic valve, a ratio of the heat exchange area of a condenser to the input power of a compressor is 5.6-13.5 m<2> / kw, and the condenser fan has the total pressure of 80-400 Pa. The invention fully exerts the heating potential of the air source heat pump to improveso the energy efficiency ratio of the system and satisfy the need for drying materials or heating in life, improves the working capacity and the environmental change suitability of the air-source heat-pump air heater so that the system stably operates, ensures that the application range of the air source heat pump is greatly enlarged, and has wide geographic or climatic suitability range and positive significance in saving energy and protecting environment.

Description

technical field [0001] The invention relates to an air source heat pump air blower, in particular to an air source heat pump air blower which adopts a parallel evaporator to improve energy efficiency. Background technique [0002] The air source heat pump is mainly composed of compressor, evaporator, throttling device, condenser, working fluid circulation pipeline and other parts. Based on the principle of the reverse Carnot cycle, it is driven by electric energy, and effectively absorbs the unusable low-grade heat energy in the air through the heat transfer medium, and upgrades it to the available high-grade heat energy for use. Its working process: ①The heat transfer working medium enters the evaporator, and the working medium absorbs heat and evaporates in the evaporator. At this time, the working medium absorbs heat from the low-temperature heat source and then enters the compressor; ②After the working medium is compressed and heated by the compressor, The working fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H4/06F24H9/20F25B41/04F25B41/06F25B49/02F25B5/02
Inventor 汤世国
Owner 湖南省浏阳市择明热工器材有限公司
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