Solar hot water efficient defrosting device

A solar hot water and solar collector technology, applied in solar thermal devices, solar thermal power generation, heating devices, etc., can solve problems such as aggravating water temperature fluctuations, severe system pressure fluctuations, affecting compressor life, etc., and achieve energy saving and defrosting. , to ensure the effect of comfort

CN103557650BInactive Publication Date: 2016-04-13ZHEJIANG SCI-TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an efficient defrosting device for solar hot water. The efficient defrosting device for the solar hot water comprises a solar thermal collector, a circulating pump, a heat accumulation water tank, a water pipe, defrosting heat exchange pipes, an evaporation coil pipe, hydrodynamic pistons, a double-shaft crank shaft and a fan; a plurality of defrosting heat exchange pipes are arranged on the front side of the evaporation coil pipe; the fan is arranged on the rear side of the evaporation coil pipe; upper ends of the defrosting heat exchange pipes are communicated with the bottom of the inner chamber of the heat accumulation water tank through the water pipe; the lower ends of the defrosting heat exchange pipes are closed; the hydrodynamic pistons are installed inside the defrosting heat exchange pipes; the lower portions of the hydrodynamic pistons are fixedly connected with the double-shaft crank shaft; the double-shaft crank shaft drives the hydrodynamic pistons to vertically move inside the defrosting heat exchange pipes. The efficient defrosting device for the solar hot water has the advantages of achieving efficient, rapid and energy saving defrosting, enabling a unit to have a heating function during defrosting and accordingly guaranteeing comfort of the indoor environment.
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Description

Technical field

[0001] The invention relates to a defrosting device for a solar hot water air-cooled heat pump unit.

Background technique

[0002] In winter, when the heat pump air conditioner is in heating operation, if the surface temperature of the evaporating coil of the cooling air is lower than the dew point temperature of the cooled air, the water vapor in the air undergoes a phase change process from steam to solid, making Water vapor accumulates on the surface of the heat exchanger as a relatively loose layer of ice crystals to form a frost layer. As the frost layer thickens, the additional significant thermal resistance of the heat exchanger increases, and the air circulation area of ​​the heat exchanger becomes narrower, the air flow decreases, the wind resistance increases, and the power of the fan increases. Thermal capacity gradually decreases. Regular defrosting is a necessary step to ensure the normal operation of the air-cooled heat pump unit. [0003...

Examples

Embodiment Construction

[0022] refer to figure 1 , figure 2 , solar hot water high-efficiency defrosting device, including solar collector 1, circulation pump 2, heat storage tank 3, water pipe 4, defrosting heat exchange pipe 5, evaporation coil 6, water piston 7, biaxial crank Rod 8, fan 9. The front side of the evaporating coil 6 is provided with a row of defrosting heat exchange tubes 5, and the hot water in the defrosting heat exchange tubes 5 pushes the hydraulic piston 7 to move up and down under the action of the biaxial crank 8, and the defrosting heat exchange tubes The upper end of 5 is connected to the bottom of the heat storage tank 3 through the water pipe 4; one side of the heat storage tank 3 is connected to the inlet of the circulation pump 2, and the outlet of the circulation pump 2 is connected to the inlet of the solar heat collector 1 , the outlet end of the thermal energy collector 1 is connected to the other side of the heat storage tank 3; the fan 9 is arranged on the rear ...