Heat-pump water heater with dual water tanks and heating method thereof

A technology of heat pump water heater and heating method, which is applied in fluid heaters, lighting and heating equipment, etc., can solve problems such as large irreversible heat loss, and achieve the effects of reducing irreversible heat loss, high heat pump performance coefficient, and convenient installation and operation

Inactive Publication Date: 2010-06-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If cold water is added to the heating water tank during the transfer process, there will be a large irreversible heat loss caused by the direct mixing of cold and hot water in the heating water tank

Method used

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  • Heat-pump water heater with dual water tanks and heating method thereof
  • Heat-pump water heater with dual water tanks and heating method thereof
  • Heat-pump water heater with dual water tanks and heating method thereof

Examples

Experimental program
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Effect test

Embodiment

[0029] Embodiment: The double water tank heat pump water heater of the present invention, the system composition is as follows figure 1 As shown, the temperature range of hot water supply can be 35-80°C, and the applicable environmental conditions are the same as those of ordinary heat pump water heaters.

[0030] Compressor 1 adopts a fully enclosed refrigeration compressor with a cylinder displacement of 53.5cm 3 , the condenser 2 adopts a steel shell-and-tube heat exchanger, the throttling device 5 adopts a thermal expansion valve, the evaporator 7 adopts a finned tube heat exchanger, and the refrigerant is R22. The hot water storage tank 8 has the same structure as the heating water tank 9. The shell is a cylindrical PVC pipe with an inner diameter of 307mm, a height of 1000mm, and a nominal volume of 70L. The water tank shell is wrapped with 45mm thick polyethylene foam insulation. Both the float 10 of the hot water storage tank and the float 12 of the heating water tank...

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PUM

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Abstract

The invention discloses a heat-pump water heater with dual water tanks and a heating method thereof. The heat-pump water heater with dual water tanks comprises a compressor, a condenser, a liquid storage device, a drying filter, a throttle device, an evaporator, a gas-liquid separator, a heat-storing water tank, a heating water tank, a reversing device and the like, wherein the reversing device periodically changes the flow direction of water in the heating water tank and the condenser, so that cold water in the heating water tank flows through the condenser to and fro and is gradually heated to a preset temperature; the heated hot water is transferred from the heating water tank to the heat-storing water tank and stored for users to use; cold water is simultaneously supplemented into the heating water tank in the transfer process and continuously heated to the preset temperature after the supplement is finished; and cold water is simultaneously supplemented into the hot water of the heat-storing tank during use. The insides of the heating water tank and the heat-storing water tank are in float rolling sleeve structures which are used for isolating the cold water from the hot water in the water tanks, thereby effectively reducing the irreversible heat loss inside the water tanks of an air source heat-pump water heater; in addition, the invention has the advantages of high efficiency, convenient installation and running, high safety, wide application range and the like.

Description

technical field [0001] The invention belongs to a heat pump water heater, in particular to a heat pump water heater with double tanks for heating hot water in continuous flow and a heating method thereof. Background technique [0002] With the development of the economy and the improvement of people's living standards, the demand for hot water in households or industrial and commercial institutions is increasing. Water heater is an important equipment for supplying hot water. Compared with electric water heaters and gas water heaters, heat pump water heaters have higher energy utilization efficiency and remarkable energy-saving effect. [0003] At present, there are mainly three types of waterway parts of heat pump water heaters: no water tank structure, single water tank structure and double water tank structure. Tankless heat pump water heaters are mainly instantaneous types, and their disadvantage is that the coefficient of performance of the heat pump is low. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H4/04
Inventor 张后雷刘心志朱曙光
Owner NANJING UNIV OF SCI & TECH
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