A phase change heat storage solar water heater with an overheating prevention structure

Abstract

The invention provides a phase change heat storage solar water heater with an anti-overheating structure. The phase change heat storage solar water heater comprises a water inflow pipe, a water outflow pipe, a phase change heat storage solar water heater body and a radiator. Heat insulation cladding and multiple parallel vacuum tubes are arranged in the phase change heat storage solar water heater body. Phase change heat storage materials are located in the vacuum tubes. The radiator comprises heat conduction rods and cooling fins. The phase change heat storage solar water heater is characterized in that the parallel vacuum tubes are covered with thermotropic scattering layers; and when the temperature of the phase change heat storage materials is higher than the light-transmitting change threshold temperature of the thermotropic scattering layers, light transmitting of the thermotropic scattering layers is changed into scattering, sunlight radiation is prevented from reaching the vacuum tubes, the sunlight radiation is scattered to the surfaces of the heat conduction rods, the sunlight radiation is absorbed by the heat conduction rods and converted into heat, and the heat is transferred to the cooling fins of the radiator for heat dissipation, so that temperature rise of the phase change heat storage materials is avoided, and overheating protection for the phase change heat storage solar water heater is achieved.

Description

technical field [0001] The invention relates to the technical field of solar water heaters, in particular to a phase-change thermal storage solar water heater with an overheating prevention structure. Background technique [0002] Solar thermal utilization is one of the most commercialized and widely used technologies in new energy and renewable energy, and has brought huge energy-saving and environmental protection benefits. my country has the largest production of solar water heaters and the largest number of households with solar water heaters , The country with the largest potential market. [0003] Phase change heat storage solar water heater is a kind of solar water heater with small volume and high energy storage density. The main feature of phase change heat storage is that it utilizes the phase change latent heat of phase change materials to realize energy storage and utilization. When the user is not using it, there is no water flow inside the phase change heat st...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the adjustment action is based on the water temperature and water level in the water tank, not directly on the temperature and pressure of the phase change heat storage material. When the house has not been delivered or is unoccupied for a long time, and the tap water is blocked, it cannot play the role of overheating protection; and The system is complex and expensive

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