Safe type phase change heat storage water tank

Abstract

The invention provides a safe type phase change heat storage water tank. The safe type phase change heat storage water tank comprises a shell body (1) with a heat exchanger. The shell body (1) is internally provided with an electric heating element (3) and loaded with a phase change heat storage material. The shell body (1) is provided with protection fluid (4) and a safety tube (2). The phase change heat storage material floats on the protection fluid (4). The phase change heat storage material and the protection fluid (4) form a layered structure. The boiling point of the protection fluid (4) is higher than the phase change temperature of the phase change heat storage material. One end of the safety tube (2) extends into the protection fluid (4), and the other end of the safety tube (2) communicates with the atmosphere. According to the safe type phase change heat storage water tank, due to the fact that the boiling point of the protection fluid is higher than the phase change temperature of the phase change heat storage material, when the temperature of the phase change heat storage material is higher than the boiling point of the protection fluid, the temperature of the phase change heat storage material can be prevented from further increasing due to the fact that a large amount of heat energy needs to be absorbed in the protection fluid boiling process, and the vaporized protection fluid is discharged out of the water tank through the safety tube, so that the safety accident risk caused by over-temperature is effectively reduced.

Description

Technical field [0001] The invention belongs to the field of water heaters, and particularly relates to a safe phase change hot water storage tank. Background technique [0002] In the prior art, storage-type electric water heaters use water as the heat storage fluid, and most of them limit the maximum water temperature to 75°C. Due to the use of non-phase change heat storage methods, and considering factors such as safety and economy, it is difficult to The increase in heat storage per unit volume results in the storage-type electric water heater requiring a larger volume to store hot water to meet the needs of use. The use of phase-change heat storage measures can greatly reduce the overall dimensions of storage-type electric water heaters. However, because some phase-change heat storage materials may appear unsafe under high temperature conditions, if the electric water heater's thermostat and other electrical protection When the device fails, the temperature of the phase cha...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, water storage electric water heaters use water as the heat storage fluid, and most of them limit the maximum water temperature to 75°C. Due to the non-phase change heat storage method, and considering factors such as safety and economy, it is difficult to The heat storage per unit volume increases, resulting in the need for a larger volume of water storage electric water heaters to store hot water to meet the needs of use

The use of phase change heat storage measures can greatly reduce the external dimensions of water storage electric water heaters. However, due to the fact that some phase change heat storage materials may appear unsafe under high temperature conditions, if the electric water heater thermostat and other electrical protection When the device breaks down, it is possible that the temperature of the phase change heat storage material will rise significantly beyond the warning range, thus causing potential safety hazards

Images