Safe type phase change heat storage water tank

A phase-change heat storage and water tank technology, which is applied to heat storage heaters, fluid heaters, lighting and heating equipment, etc. The effect of preventing further temperature rise, reducing risk, and prolonging alert time

Active Publication Date: 2016-08-24
合肥万和电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Safe type phase change heat storage water tank
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this embodiment, an electric heating element is used as the heater 3, and the heat exchange inner coil and the heat exchange outer coil in series are used as the heat exchange coil. See figure 1 As shown, it includes a shell 1, a safety tube 2, an electric heating element, water, a phase change heat storage material, a heat conduction material, and a series of heat exchange inner coils and heat exchange outer coils. The shell 1 is composed of a cylinder body, a main cover and a sub cover. The safety pipe 2 is a hollow through pipe. The heat exchange inner coil is placed on the inside of the housing 1, and the two ports of the heat exchange inner coil are respectively extended out of the housing 1 through the main cover and the auxiliary cover; the heat exchange outer coil is placed on the outside of the housing 1 , The lower ports of the inner heat exchange coil and the outer heat exchange coil are connected to each other so that the inner heat exchange coil and the ...

Embodiment 2

[0024] See figure 2 As shown, compared with the first embodiment, this embodiment eliminates the electric heating element, disconnects the inner coil and the outer coil in series, and resets the functions of the inner and outer coils. In this embodiment, the inner coil is used as the heater 3, and the outer coil is used as the heat exchange coil, and the other structure is the same as the first embodiment.

[0025] The heat storage process of this embodiment is: the heating inner coil is used as the heat storage fluid channel, the high temperature fluid enters the solid phase change heat storage material inside the heating inner coil heating shell 1, and then becomes a low temperature fluid and flows out, and the solid phase changes After the temperature of the heat storage material is higher than its phase change temperature, the phase change heat storage material is gradually liquefied into a liquid phase change heat storage material and stores a large amount of heat energy. ...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H7/02F24H9/00F24H9/18
Inventor 卢楚鹏黄逊青方巧莲
Owner 合肥万和电气有限公司
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