A method for improving the performance of a heat pump hot water unit
A heat pump hot water and unit technology, applied in the field of air-conditioning heat pumps, can solve the problems of large heat transfer resistance and low heat transfer performance, reduce the heat transfer resistance of condensation, improve the efficiency of condensation heat transfer, and improve the operating performance of the unit Effect
Active Publication Date: 2018-09-28
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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Problems solved by technology
[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects of large heat transfer resistance and low heat transfer performance of heat pump water heater units in the prior art, especially heat pump water heater units with micro-channel heat exchangers, so as to provide A method for improving the performance of a heat pump hot water unit
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[0026] The present invention provides a method for improving the performance of a heat pump hot water unit, wherein, as figure 1 As shown, the unit includes an outdoor unit 1 and a water tank 2, wherein the outdoor unit includes a four-way valve 11, a compressor 12, an outdoor heat exchanger 13, a throttling device 14, a fan 15, and a controller (not shown) , Suction temperature sensor package (not shown, to detect compressor suction temperature), discharge temperature sensor package (not shown, to detect compressor discharge temperature), outdoor environmental temperature sensor package (not shown, to detect ambient temperature ) Etc.; The water tank includes an inner tank 21, a microchannel heat exchanger 22, a first header, a second header, a total inlet of working fluid, an insulation layer and an outer shell, a water temperature sensor (not shown, detection The water temperature can be single, two or more) and the condensed refrigerant temperature sensor (not shown, refers ...
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The invention provides a method for performance improvement of a heat pump hot water unit. The unit comprises a compressor (12), an outdoor heat exchanger (13), a controller and a water tank (2). The method comprises the following steps of (1) a detecting and judging step: detecting and judging whether the supercooling degree of a refrigerant at an outlet of the water tank exceeds a preset supercooling degree value or not, if yes, entering a controlling and regulating step, and if not, running the unit according to a normal mode; (2) the controlling and regulating step: when the controller receives a signal indicating that the supercooling degree of the refrigerant exceeds the preset supercooling degree value, controlling the unit to switch a refrigerant flow direction in a loop, so that the refrigerant carries out evaporation related heat absorption on the water tank, and a condensation heat exchange liquid film during the running process of the unit for preparing hot water is reduced. According to the method for performance improvement of the heat pump hot water unit provided by the invention, the condensation heat exchange liquid film of the refrigerant during the running process of the unit for preparing hot water can be reduced, the condensation heat exchange heat resistance is reduced, and the condensation heat exchange efficiency and the unit running performance are improved.
Description
Technical field [0001] The invention belongs to the technical field of air-conditioning heat pumps, and specifically relates to a performance improvement method of a heat pump hot water unit. Background technique [0002] The microchannel heat exchanger in the prior art, as a high-efficiency, material-saving, environmentally friendly, and light-weight heat exchanger, has been more and more widely used in heat pump water heaters. [0003] The micro-channel heat exchanger is used in the outer plate water tank of the heat pump water heater. Compared with the traditional D-type coil, the contact area is larger, and the convective heat transfer coefficient can be greatly improved under the small scale. Therefore, the micro-channel heat exchanger is used. It can effectively improve the heat exchange efficiency, reduce the refrigerant charge of the system and reduce the overall weight of the water tank. [0004] As we all know, air source heat pump unit water tank side condensation heat ex...
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IPC IPC(8): F24H4/04
CPCF24H4/04
Inventor 欧阳光寇颖举钟文朝
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION