Heat exchange device for phase-change heat storage type water heater and water heater

Abstract

The invention discloses a heat exchange device for a phase-change heat storage type water heater and relates to the technical field of water heaters. The heat exchange device comprises a phase-change heat storage shell, a heating device, heat exchange pipes and heat conduction fins, wherein the heating device, the heat exchange pipes and the heat conduction fins are arranged in the shell. The shell is filled with a phase-change material. A temperature sensor is arranged in the phase-change material. The heat conduction fins are mounted on the heat exchange pipes. The two ends of each heat exchange pipe correspondingly communicate with a water inlet pipe and a water outlet pipe. The heating device is arranged at the joint of the water inlet pipe and the heat exchange pipes and electrically connected with a temperature controller and is used for heating tap water flowing into the heat exchange pipes from the water inlet pipe. The invention further discloses the water heater with the heat exchange device. According to the heat exchange device and the water heater, heat storage and heat release of the phase-change material can share one heat exchange pipeline, the heating device is built-in, and no connecting accessory parts such as a circulation pump and a check valve need to be additionally arranged; and the structure is simple, the pipeline and space are saved, the electric heating efficiency is improved, the cost is saved, the failure rate and the heat loss are lowered, and user experience is improved.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to a heat exchange device for a phase-change heat storage water heater and a water heater with the heat exchange device for a phase-change heat storage water heater. Background technique [0002] Phase-change heat storage water heaters have been vigorously promoted because of their high heat storage density, long service life, etc., and they can use cheap valley electricity for heat storage, responding to the national energy-saving policy of shifting peaks and filling valleys. Due to the low thermal conductivity of the phase change material, it is solid before the phase change, and the electric heating tube cannot be used to directly heat the phase change material. The heat storage method is through secondary heat exchange. Currently, spiral, distributed The type or fin is that the pipe is buried inside the phase change material, and the phase change heat storage module has an...

AI Technical Summary

Problems solved by technology

[0003] (1) Additional accessories such as pipelines, circulation pumps, and thermal insulation materials are added, which is costly and increases the number of faulty water leakage points;

[0004] (2) The circulating pump has low reliability, is easily damaged, and has noise in operation, which affects the user experience;

[0005] (3) The installation of pipelines, circulating pumps and other accessories takes up a lot of volume, resulting in the entire water heater taking up a lot of space, and the space utilization rate is low;

[0006] (4) The auxiliary energy is heated externally, and the phase change is charged and stored by circulating hot water. The heat loss is serious and the energy conversion rate is low.

[0007] Based on the above description, there is an urgent need for a new phase-change heat storage water heater heat exchange device to solve the existing phase-change heat storage water heaters with many connection accessories, high cost, many pipeline connections, and many hidden dangers of water leakage; Circulation pumps have low reliability and noisy operation, which affects user experience; connecting pipes and accessories take up space, water heaters are bulky, and space utilization is low; auxiliary energy heating conversion efficiency is low, etc.

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