Heat pump water heater

A technology for heat pump water heaters and water tanks, which is applied to fluid heaters, lighting and heating equipment, etc., which can solve the problems of decreased heating efficiency, failure to operate normally, and easy frosting of the evaporator, and meet the requirements of reducing the evaporation temperature and strengthening Evaporation and heat transfer effect, effect of improving frost resistance

Inactive Publication Date: 2015-05-27
HUNAN INSTITUTE OF ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in humid and cold areas, when the outdoor temperature is as low as 2-2°C, the evaporator is prone to frost, resulting in a decrease in heating efficiency, especially in areas at 32° north latitude, such as Shanghai, Changsha, Chengdu and other places where frequent frosting and dew removal reduce the heating efficiency. The problem of falling is more serious
Existing low-temperature heat pump water heaters generally cannot operate normally in environments below -10°C

Method used

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  • Heat pump water heater
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Embodiment Construction

[0014] In order to facilitate understanding of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.

[0015] Examples see figure 1 The heat pump water heater includes a water tank 1, a first heater 2, a water pump 5 between the first outlet 3 of the water tank 1 and the first inlet 4 of the first heater 2, a compressor 9, an evaporator 12, and a water pump located between the first outlet 3 of the water tank 1 and the first inlet 4 of the first heater 2. 5 and the bypass pipeline 16 between the first heater 2, the first electromagnetic valve 17 on the bypass pipeline 16, the second refrigerant outlet 13 of the evaporator 12 and the third outlet 10 of the compressor 9 The second solenoid valve 26 between them and the second heater 18 arranged opposite to the evaporator 12 . The second outlet 6 of the first heater 2 is connected with the second inlet 7 of the water tank 1 . The water in the water tank 1 ent...

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Abstract

The invention relates to the field of heat pump equipment and particularly relates to a heat pump water heater. Aiming at the problem that a heat pump water heater in a wet-cold region is difficult to be defrosted, the heat pump water heater provided by the invention is additionally provided with a second heater in a position opposite to an evaporator of an existing heat pump water heater, so that one part of hot water generated by the heat pump water heater exchanges heat with air which is to enter the evaporator in the second heater, so that the temperature of the air entering the evaporator is increased, and by virtue of reverse defrosting, the problem of frosting in winter in the wet-cold region can be effectively solved; furthermore, the heat pump water heater is low in cost and good in effect. The heat pump water heater provided by the invention can be widely applied to heating water systems in the wet-cold region in winter.

Description

technical field [0001] The invention relates to the field of heat pump equipment, in particular to a heat pump water heater. Background technique [0002] The heat pump water heater is mainly composed of compressor, expansion valve, four-way valve, evaporator, condenser, fan, economizer and other components. The compressor sucks low-temperature and low-pressure gas refrigerant from the evaporator, compresses the refrigerant into high-temperature and high-pressure gas refrigerant, and the high-temperature and high-pressure gas refrigerant enters the condenser, exchanges heat with water, enters the condenser, is condensed into a low-temperature liquid and Heat is released, the water absorbs the heat released, and the temperature continues to rise. After the condensed high-pressure and low-temperature liquid is throttled and depressurized by the expansion valve, it absorbs the heat of the surrounding air in the evaporator through the action of the fan, and evaporates into a lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H4/02F24H9/00
Inventor 刘向龙饶政华
Owner HUNAN INSTITUTE OF ENGINEERING
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