Low temperature heat-pump water heater capable of cascade heating multimode coupling layered water discharge

A cascade heating and water heater technology, applied in the field of heat pumps, can solve the problems of limited working range and poor operation stability, and achieve the effects of extending the working range, improving energy efficiency, and saving energy waste.

Inactive Publication Date: 2018-08-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the disadvantages of poor operation stability and limited working range of existing water heaters, the present invention provides a l

Method used

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  • Low temperature heat-pump water heater capable of cascade heating multimode coupling layered water discharge

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings.

[0013] refer to figure 1 , a low-temperature heat pump water heater with cascade heating, multi-mode coupling and stratified water outlet, including an evaporator 1, a first compressor 2, a first shut-off valve 3, a second shut-off valve 4, an intermediate heat exchanger 5, and a first expansion valve 6 , the second compressor 7, the first condenser 8, the second condenser 9, the second expansion valve 10, the water pump 11, the third shut-off valve 12, the fourth shut-off valve 13, the fifth shut-off valve 14, the sixth shut-off valve 15. The seventh stop valve 16, the eighth stop valve 17, the ninth stop valve 18, the tenth stop valve 19, the flow regulating valve 20, the water tank 21, the first water mixing valve 22 (with flow sensor), the second water mixing valve Valve 23 (with flow sensor), third mixing valve 24 (with flow sensor), eleventh stop valve 25 , cont...

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Abstract

The invention discloses a low temperature heat-pump water heater capable of cascade heating multimode coupling layered water discharge. The low temperature heat-pump water heater comprises an evaporator, a first compressor, a first stop valve, a second stop valve, a middle heat exchanger, a first expansion valve, a second compressor, a first condenser, a second condenser, a second expansion valve,a water pump, a third stop valve, a fourth stop valve, a fifth stop valve, a sixth stop valve, a seventh stop valve, an eighth stop valve, a ninth stop valve, a tenth stop valve, a flow regulating valve, a water tank, a first water mixing valve, a second water mixing valve, a third water mixing valve and an eleventh stop valve. Two types of coupling heat pump circulation are adopted to independently heat a plurality of different temperature stratification areas in the water tank through switching of multiple modes; and the manner that different temperature stratification areas are independently heated under different coupling modes through switching of different stop valves is adopted. The low temperature heat-pump water heater disclosed by the invention is higher in operating stability and larger in working range.

Description

technical field [0001] The heat pump field of the present invention relates to a heat pump water heater. Background technique [0002] With the gradual recognition of the market and the support of national policies, air source heat pump water heaters have been widely promoted, and users pay special attention to water comfort and energy saving. Existing heat pump water heaters can only heat water to a very high temperature and store it in the water tank. When users use hot water at a lower temperature, they can only use it after mixing hot water with high temperature from the water tank and mixing it with cold water. This process wastes the available energy in the hot water As a result, a large entropy production is generated, which reduces the utilization rate of energy, and has a single temperature of hot water, which cannot quickly meet the needs of users for different water temperatures; and when the heat pump system detects that the water temperature drops, it will aut...

Claims

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Application Information

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IPC IPC(8): F24H4/02F24H9/20F25B1/10F25B41/04F25B41/06F25B41/20F25B41/30
CPCF24H4/02F24H9/2014F25B1/10F25B41/31F25B41/20
Inventor 徐英杰李恩腾蒋宁
Owner ZHEJIANG UNIV OF TECH
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