JPS61295493A - Heat storage device - Google Patents

Abstract

PURPOSE:To make it possible to constantly set a cooling nucleus in a heat storage material and to carry out a rapid heat radiation from the heat storage material to a fluid thereby to improve the temperature control precision of the fluid. CONSTITUTION:A heat storage device 3 is mounted around the periphery of a pipe 2 through which a fluid 1 which tends to keep a predetermined temperature. A heat pipe 7 extending through a heat storage vessel 4 is mounted on the heat storage device 3. One end of the heat pipe 2 is disposed in the heat storage material 5 within the heat storage vessel 4, and another end thereof is disposed in the low temperature part 8 outside the heat pipe 7. The low temperature part 8 consists of the atmospheric air, for example. The end part within the heat storage vessel 4 of the heat pipe 7 constitutes an evaporating part 7a, and the end part on the side of the low temperature part 8 of the heat pipe 7 constitutes a condensing part 7b. When the fluid 1 passes the position of the heat storage device 3, if it is of a high temperature, the heat is absorbed to a heat storage material 5. As a result, the heat storage material 5 is melted. If it is of a low temperature, the heat is rediated from the heat storage material 5, and the heat storage material 5 is condensed, and tends to maintain a predetermined temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Use] The present invention relates to a heat storage device, and more particularly to a coolant for a latent heat storage device.

[Prior Art] In order to maintain a fluid at a constant temperature, a latent heat type heat storage device is provided in the fluid passage, and when the temperature of the fluid is high, heat is absorbed from the fluid to a heat storage material, and the heat storage material is changed from a solid to a fluid. change the phase to
When the temperature of the fluid is low, it is effective to apply heat from the heat storage material to the fluid to change the phase of the heat storage material from liquid to solid. In order for fluid temperature control to be performed with high precision using a latent heat storage device, the heat storage material must transfer latent heat of solidification and fusion during phase transformation, and in a supercooled state, only sensible heat can be released. There must be no phenomenon of loading and unloading.

Conventionally, in Japanese Patent Publication No. 52-22460, etc., in order to prevent storage of latent heat storage devices and overcooling of heat materials, branch pipes communicating with the inside of the heat storage tank are installed in the heat storage tank, and both the heat storage tank and the branch pipes are installed. A heat storage device is disclosed in which the heat storage material is filled with a heat storage material, the heat storage material is constantly cooled by branch pipes, and the crystal nuclei are retained to prevent overcooling during heat dissipation.

[Problems to be Solved by the Invention] However, in these methods, the main body of the stainless steel branch pipe is also heated together with the melting of the heat storage material, and the crystal nuclei to be retained are only created outside the heat storage device or near the outer wall, resulting in poor efficiency. It was not possible to obtain a nucleation position for good supercooling prevention.

An object of the present invention is to provide a technology that allows the nucleation position for preventing past cooling to be freely set and allows efficient heat dissipation.

[Means for Solving the Problems] The heat storage HIl of the present invention that meets this objective is such that a heat pipe is placed in a heat storage container filled with a latent heat storage material, with one end disposed inside the heat storage material and the other end placed outside the heat storage container. Consists of a device installed in a low-temperature area.

In the heat storage device described above, the latent heat storage material melts when the working fluid is at a high temperature, and even in the heat storage state, a part of the heat storage material is constantly cooled and solidified by the heat vibration, so solidification nuclei are always present. When the fluid becomes low temperature and heat is dissipated from the heat storage material to the fluid, the heat storage material does not undergo a phase change and does not become supercooled.
Immediate solidification heat release can be initiated. As a result, heat can be rapidly radiated from the heat storage material to the fluid, and the accuracy of temperature control of the fluid can be improved.

Preferred embodiments of the heat storage device according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a heat storage device according to an embodiment of the present invention.

In the figure, a heat storage device 3 is attached around a pipe 2 through which a fluid 1 whose temperature is to be maintained constant flows. The heat storage part H3 is
It consists of a latent heat type heat storage material 5 sealed in a heat storage container 4 provided so as to surround a tube 2, and the heat storage material 5 is isolated from the outside and the fluid 1.

Inside the heat storage container 4 on the outer periphery of the tube 2, there is a fluid 1 and a heat storage material 5.
Fins 6 are attached to improve heat exchange with the engine.

A heat vibrator 7 is attached to the heat storage device 3 and extends through the heat storage container 4. One end of the heat vibrator 7 is disposed in the heat storage material 5 inside the heat storage container 4, and the other end of the heat vibrator 7 is placed in the heat storage material 5 inside the heat storage container 4. It is arranged in a low temperature section 8 outside the container 4. The low temperature section 8 is made of, for example, the atmosphere. The end of the heat vibe 7 inside the heat storage container 4 constitutes an evaporation section 7a, and the end of the heat vibe 7 on the low temperature section 8 side constitutes a condensation section 7b. The evaporation section 7a of the heat vibrator 7 is set at a position of the heat storage container 4 where overcooling of the heat storage material 5 can be most prevented.

Next, the operation of the above embodiment will be explained.

When the fluid 1 passes through the heat storage device 3, if the temperature is high, heat is absorbed by the heat storage material 5 and the heat storage material 5 melts, and if the fluid 1 is low temperature, heat is released from the heat storage material 5 and the heat storage material 5 melts. solidifies and tries to maintain a constant temperature. Since the condensing part 7b of the heat vibrator 7 is placed in a low-temperature part 8 such as the atmosphere and is constantly cooled, the heat storage material 5a around the heat storage part 7a is constantly solidified, as shown in FIG. . When heat is released from the heat storage material 5, solidification proceeds quickly without supercooling using the constantly condensed heat storage material 5a as a core, and heat is released from the heat storage material 5 to the fluid 1 flowing in the pipe 2.

When the above-mentioned effects are compared with the conventional case in which no heat vibrator is provided, the results are shown in FIG.

That is, during heat storage, the temperature of the fluid 1 is maintained at a high temperature (line A), but when the temperature of the heat storage device 3 artificial fluid suddenly decreases for a constant FR (range 8) (broken line C).
In conventional heat storage devices, the heat storage material does not solidify and release heat until it reaches a certain supercooling temperature (the temperature at which it approaches). However, if the present invention is used, even if the temperature of the artificial fluid in the heat storage device 3 suddenly decreases, the heat storage material 5 will immediately solidify. As heat dissipation progresses, the temperature of the fluid at the outlet of the heat storage device 3 is kept constant at all times (at the bottom line G).

[Effects of the Invention] As can be seen from the above explanation, when using the heat storage device of the present invention, a heat vibrator is installed in the latent heat storage material to locally cool the heat storage material. At the same time, cooling nuclei can be set on the heat storage material at all times, preventing overcooling when the latent heat storage material solidifies and radiates heat, and the nucleation position can be set freely by setting the heat vibrator at any position. , the effect of efficient heat dissipation can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a heat storage device according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the vicinity of the heat pipe of the device in FIG. FIG. 2 is a diagram showing the relationship between time and fluid temperature. 1... Fluid 2... Tube 3... Heat storage device 4... Heat storage container 5... Heat storage material 6... Fin 7...Heat vibe 7a...Evaporation section 7b...Condensation section 8...Low temperature section

Claims (1)

[Claims] (1) A heat storage device characterized in that a heat pipe is attached to a heat storage container filled with a latent heat storage material, with one end disposed within the heat storage material and the other end disposed in a low temperature area outside the heat storage container.