Phase-change energy-storage water heater

Abstract

The invention relates to a phase-change energy-storage water heater. The water heater comprises a heat exchanger shell, wherein a heat insulation material layer is arranged in the heat exchanger shell, a liner is arranged inside the heat insulation material layer and comprises a liner shell, the liner is filled with a phase-change material, the phase-change material accounts for 80-98% of the volume of the liner, a heat exchange coil is embedded in the phase-change material, electric heating mechanisms are evenly arranged in the phase-change material, a temperature sensor is arranged in the phase-change material, the phase-change material temperature sensor and the electric heating mechanisms are electrically connected to a controller, and the controller is installed on the heat exchanger shell. The phase-change energy-storage water heater is compact in structure, capable of achieving even heating, high in heat transfer performance and high in water outlet efficiency.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to a phase change energy storage water heater. Background technique [0002] The phase change energy storage water heater utilizes the advantages of high enthalpy value and high energy storage density of the phase change energy storage material to store electric energy or thermal energy in the phase change material of the phase change energy storage water heater, and use tap water to pass through the heat exchange plate when hot water is needed The tube displaces the heat stored in the phase change material. The high enthalpy value of phase change materials determines that phase change energy storage water heaters have many advantages. Compared with existing water storage water heaters, this water heater has a smaller structure, less internal water storage, no stagnant water, and can prevent scaling. occurs, electric heating of phase change materials can achieve electricity-w...

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Problems solved by technology

[0003] Existing phase-change water heaters at present, such as water heaters described in CN203880936U, include evaporators, compressors, throttle valves, heat exchange coils, coil-type hot water pipes, etc., and the heat exchangers have complex structures. In the process, it is necessary to bury both the heat exchange coil and the coiled hot water pipe at the same time. The two coils use different media in the process of heat storage and discharge respectively. Therefore, the contact area with the phase change material is relatively small. , affect the heat storage and release effect of the phase change material; the electric heating element method described in CN204084826U will cause local overheating of the phase change material, and the heat storage of other parts of the material is insufficient, or even the problem of not reaching the phase change point, which affects the phase change material. Heat storage performance; the water heater described in CN102654308 uses pump circulating water to heat the phase change material. A water pump and a water container need to be installed in the water heater, which increases the complexity of the water heater and reduces the space utilization of the water heater. In addition, the phase change material is encapsulated in the pipeline In several external containers, it is not conducive to the natural convection of the phase change material and affects its heat transfer effect

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