JP2742350B2 - Heat storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage device in which a latent heat storage material is incorporated in a container used for a regenerative electric hot air heater for heating a general household.

[0002]

2. Description of the Related Art A conventional heat storage device 1 of this type fills a container 2 with a latent heat storage material 3 and performs a melting process by a heater 4 in contact with the container 2 and heat exchange between convection air 5 and the container 2. By repeating the solidification process, heat is selectively given to the inside of the container 2 to store heat, or conversely, to release heat.

For example, in a regenerative electric hot-air fan 14 as shown in FIG. 3, the heat storage device 1 is provided in a convection air passage 9 of the electric hot-air fan 14 so as to heat the heater at night when heat radiation is not required. 4 energize and store thermal energy,
When the temperature reaches a predetermined temperature, the temperature is kept until the electric hot air blower 14 is operated in combination, and when the electric hot air blower 14 is used in the morning or the like when necessary, a heating capacity higher than that of the electric hot air heater is obtained.

When the fan 7 is rotated by the blower motor 6 during the combined operation of the heat storage device 1 and the electric warmer 14, the convection air 5 flows from the suction port 8 by the suction force of the fan 7 and enters the ventilation path 9. After passing through a certain heat storage device 1, the heat storage device 1
As a result, the warm air 10 is turned into warm air 10, reaches a warm air heater 11 such as a positive-characteristic heating element, and is further warmed into warm air 12, which is discharged from a warm air outlet 13.

[0005]

The heat storage device utilizing the phase change using the latent heat storage material is generally used for this kind of application as already known from Japanese Patent Application Laid-Open No. 2-203198. The heat storage material 3 decreases in volume when it becomes a solid phase, and as shown in FIG. 4A, the heat storage material 3 solidifies below the container 2 due to the action of gravity, and a space 15 above the container 2 with the decrease in volume. Occurs.

When heated by the heater 4 in this hardened state, volume expansion starts from the time when melting starts, and when all the heat storage materials 3 melt and become liquid as shown in FIG.
Since the liquid is incompressible, the volume expansion force when changing from a solid to a liquid is such that when the container 2 is open to the atmosphere, the gas in the space 15 flows out of the container 2, Contains a component that is obtained by liquefying and evaporating the heat storage material 3. In particular, in the case of the organic heat storage material 3, some materials such as low-molecular-weight aldehydes emit an unpleasant odor, and it is difficult to select a material. Was.

When the container 2 is closed, it is absorbed by compressing the space 15, but at this time, the force that balances the compressive force of the space 15 generated by the volume expansion is applied to the liquid heat storage material 3 and the container 2. Work on.

In particular, a very large stress is applied to the container 2 as compared with the case of a solid state, and deformation of the container 2 and outflow of the liquid heat storage material 3 out of the container 2 due to breakage of a joint portion occur.
Thereafter, it had a major drawback that it could not be used as a heat storage device.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a container 2 which may be deformed or a joint may be damaged even if expansion and contraction due to heating and cooling are repeated. Another object of the present invention is to provide a heat storage device which can reduce an unpleasant odor.

[0010]

According to the first aspect of the present invention, a heat storage material filled in a container is repeatedly melted and solidified.
In a latent heat storage device that selectively stores heat in the container or releases heat from the container, a hole for releasing the pressure in the container to the atmosphere is provided, and a pipe is provided in the hole, and the pipe is provided. The inside is filled with a deodorant.

[0011] Claim 2 is filled in a closed container.
By repeating the process of melting and solidifying the heat storage material, the container
Latent heat that selectively stores heat in or releases heat from the container.
In a thermal type heat storage device, the pressure in the container is absorbed.
For this purpose, a closed auxiliary container that is in communication with the container
Only that.

[0012]

The pressure in the container is released to the atmosphere through the pipe. Further, since the pipe is filled with the deodorant, the odor of the heat storage material is not released into the atmosphere.

[0013] Further, by communicating the auxiliary container, which is sealed separately from the container, with the container, the pressure in the container is released to the auxiliary container.

[0014]

【Example】

FIG. 1 is a cross-sectional view of a heat storage device according to a first embodiment of the present invention. FIG.
(B) similarly shows the liquid phase state. The same members as those in the conventional example are denoted by the same reference numerals.

The heat storage device 21 includes a container 22 formed by joining corrosion-resistant exterior materials 22a and 22b to each other.
The latent heat storage material 3 is filled, a heater 4 is provided on the surface of the exterior material 22a, and an opening 16 is provided in the upper part of the container 22, that is, in the vicinity of a space 15 generated when the heat storage material 3 becomes a solid phase device. A pipe 1 is provided in the opening 16.
7 are provided.

The pipe 17 is filled with a deodorant 18 which is impregnated in a granular or non-woven fabric or the like.

The latent heat storage material 3 is in a solid state at normal temperature. However, when the heater 4 is energized, the temperature of the container 22 gradually rises, and when the temperature exceeds the phase change temperature. When the heat storage material 3 starts to melt, the volume expansion of the heat storage material 3 starts at the same time, and when all of the heat storage material is melted to become a liquid (dot portion) as shown in FIG. 1 (6), the liquid is incompressible. The gas corresponding to the volume expansion when changed from a solid to a liquid is released into the atmosphere through the space 15 and the pipe 17, and the pressure in the container 22 is released.

Further, since the pipe 17 is filled with the deodorant 18, the off-flavor contained in the gas is adsorbed by the deodorant 18.

(Second Embodiment) FIGS. 2A and 2B are sectional views of a heat storage device according to a second embodiment of the present invention. FIG. 2A shows a heat storage material in a container in a solid state, and FIG. The state is shown.
The same members as those in the first embodiment are denoted by the same reference numerals.

The heat storage device 31 is constituted by a container 22 which communicates with the pipe 32 and the auxiliary container 23, the container 22
The auxiliary container 23 is a space closed to the atmosphere side .

The container 22 is formed by joining exterior members 22a and 22b, and an opening 34 is provided in the upper portion of the container 22. The container 22 is filled with the latent heat storage material 3.

The auxiliary container 33 is a container made of metal, resin, rubber or the like, has an opening 25 at one end, and is connected to the container 22 by the pipe 32.

The latent heat storage material 3 is in a solidified state at normal temperature, but when the heater 4 is energized, the container 22
Gradually rises, and when the temperature exceeds the temperature of the phase change, the heat storage material 3 starts to melt, and at the same time, the volume expansion of the heat storage material 3 starts, and all the heat storage material 3 melts, and FIG.
In the case of a liquid (dot portion) as shown in FIG. 3B, since the liquid is incompressible, the volume expansion when changing from a solid to a liquid is assisted through the space 15 and the pipe 32 communicating with the space 15. It is absorbed in the space 35 of the container 33.

For example, paraffin (melting point: 60 ° C.) is used as the latent heat storage material 3, the volume of the solid is 90% of the container 2, the heating temperature by the heater 4 is 0 ° C. to 70 ° C., and the paraffin volume change rate is 10%. Assuming that the heat storage device 1 is formed only by the container 2 as in the related art, the pressure P ₂ generated in the space 15 in the liquid state is P ₂ = (T ₂ / T ₁ ) × (V ₁ / V ₂ ) × P ₁ = (343/273) × {(1-0.9) / (1-1.1 × 0.9)} × P ₁ = 12.56P ₁ , which is an extremely large pressure. In the above equation, T ₁ is the absolute temperature before heating, T ₂ is the absolute temperature after heating, V ₁ is the volume of the space before heating, V ₂ is the volume of the space after heating, and P ₁ is the volume of the space 15 before heating. Pressure.

Therefore, an auxiliary container 33 is provided in the container 22 as in the present invention, and the volume of the auxiliary container 33 is reduced to a half of that of the container 22.
When the pressure P ₃ generated in the space _{15, P 3 = (T 2 /} T 1) × (V 1 / V 2) × P 1 = (343/273) × {(1.5-0.9) / (1.5- 1.1 × 0.9)} × P ₁ = 1.48P ₁ , which is much lower than that of the heat storage device 1 having only the container 2, and is a pressure which does not cause any problem in practical use.

The auxiliary container 18 may be made of metal, resin, rubber or the like, and is not particularly limited.

The heater 4 used for the container 2 of the heat storage device 21 of the present invention may be in contact with a portion other than the space 15, and the shape of the container 2 is the same as that of the space 15. The thickness may be reduced, or a material formed of a material different from the portion filled with the heat storage material 3 may be used.

[0028]

According to the first aspect of the present invention, since a pipe for releasing pressure to the atmosphere is provided in a part of the container, the internal force inside the container does not excessively increase, and the expansion and contraction by heating and cooling are performed.
Even if shrinkage is repeated, deformation of the container and breakage of the joint can be prevented.

Further, since the deodorant is provided in the pipe, the off-flavor of the gas released into the atmosphere is absorbed, and the off-flavor is reduced.

In claim 2, the container is sealed separately from the container.
Since an auxiliary container, the volume of the sealed entire spatial portion increases, therefore the ratio decreases with respect to the entire space of the volume expansion force, become smaller pressure on the container, the container deformation and bonding The breakage of the part can be prevented. In addition, the container and auxiliary container
With the heat storage material melted, tilt or tilt the heat storage device
Heat storage material that has melted in the container and become hot
Is safe without leakage to the outside.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a heat storage device according to the present invention, in which (a) shows a heat storage material in a solid state, and (b) shows a liquid state in the same manner.

FIGS. 2A and 2B are cross-sectional views of a heat storage device according to another embodiment of the present invention, wherein FIG. 2A shows a heat storage material in a solid state, and FIG.

FIG. 3 is a cross-sectional view of an electric hot air blower to which a heat storage device is applied.

4A and 4B are cross-sectional views of a conventional heat storage device. FIG. 4A shows a heat storage material in a solid state, and FIG. 4B shows a liquid state in the same manner.

[Explanation of symbols]

 Reference Signs List 3 heat storage material 4 heating heater 15 space 16 opening 17 pipe 18 deodorant 21 heat storage device 22 container

Claims (2)

(57) [Claims] 1. A latent heat type heat storage device that selectively stores heat in a container or releases heat from the container by repeating a melting process and a solidifying process of a heat storage material filled in the container. A heat storage device comprising: a hole for releasing the internal pressure to the atmosphere; a pipe in the hole; and a deodorant filled in the pipe. 2. The heat storage material filled in a closed container.
By repeating the melting process and the solidification process, selective
Latent heat storage that stores heat in or discharges heat from the container
A device for absorbing the pressure in the container.
A heat storage device comprising an auxiliary container which is communicated with a vessel and is hermetically sealed .