JPS5924188A - Heat accumulator - Google Patents

Abstract

PURPOSE:To make a heat accumulating material difficult to separate into two phases and enable to effect the accumulation and dissipation of heat due to the change of phase of a latent heat accumulating material effectively by a method wherein capsule holding members are attached to a plurality of stages in an outer casing horizontally with predetermined spaces and capsules, sealing the heat accumulating material are arranged horizontally on the holding members. CONSTITUTION:A plurality of horizontal stages of the capsule holding members 3, made by perforated plate constituted by a wire net, plastics, fibers or the like, or a plurality of parallel rods, are arranged in the outer casing 4. The capsules 1, sealing the latent heat accumulating material 2, are provided on the capsule holding members 3 horizontally with proper spaces. A heat medium, such as air, water, or the like, is introduced into the fan 5 in the outer casing 4 from the down side thereof. Substance, precipitated to the lower part may be molten quickly and sufficiently by heating the lower surfaces of the capsules 1 more than the upper surfaces thereof upon heat accumulating while the precipitated substance is floated to the upper part by convection effect and may be mixed quickly with the substances having low melting points, and floating in the upper part of the fluid.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention supports a number of capsules containing heat storage material in an envelope, introduces a heat medium into the envelope, and creates a gap between the heat medium and the heat storage material in the capsules. The present invention relates to a heat storage device that performs heat exchange.

Conventionally, in this type of heat storage device, a material using sensible heat sound of a substance such as water has been mainly used as a heat storage material.

However, these sensible heat storage materials have the disadvantage that their heat storage capacity is extremely small, and that the equipment is complicated and the equipment cost is relatively high. For this reason, latent heat storage materials that utilize the latent heat generated when substances solidify and melt (for example, sulfuric acid with a melting point of 30'C)
Attempts have been made to improve the above-mentioned drawbacks by using IJium decahydrate, etc., but there are the following major problems in practical application. One of them is that latent heat storage materials generally undergo solidification-melting heat treatment.
It separates into substances with high melting points and substances with low melting points, and gradually ceases to release the desired amount of latent heat at a given temperature. 1. Another problem is that when a latent heat storage material is used, it must be stored in a heat storage capsule or the like and the heat must be extracted through heat exchange through the outer wall of the capsule, and the heat exchange rate is slow. .

The present invention aims to improve the drawbacks of the latent heat storage type heat storage device described above.

Fig. 1 is a schematic sectional view of an embodiment of the heat storage device of the present invention, Fig. 2 is a perspective view of a capsule containing latent heat storage material stored therein, and Fig. 3 is A-A' of Fig. 2. FIG.

Inside the envelope 4, capsule holding members 3 made of a wire mesh, a perforated board made of plastic, fiber, or the like, or a plurality of parallel rods are arranged horizontally in multiple stages. On this capsule holding member 3, capsules 1 containing latent heat storage materials 2 are provided horizontally at appropriate intervals. Also,
A heat medium such as air or water is introduced into the envelope 4 from below by a fan 5. What is important here is to arrange the capsule 1 horizontally on the horizontal capsule holding member 3. If the capsule 1 is placed vertically, the latent heat storage material 2 (Ii) contained inside it will separate into two phases and will not return to its original state. 1-1 Clustered substances floated to the top
Therefore, even if the latent heat storage material 2 is heated with all its might to store heat again, it will not return to its original substance unless it is mixed and stirred for 1W.

On the other hand, when placed horizontally, the two substances are relatively close to each other, so they are naturally mixed and stirred by the convection effect of the liquid heat storage material caused by heating, and the two substances return to their original state. Moreover, what is more important in this case is that the lower surface of the capsule 1 is heated better than the upper surface during heat storage. In other words, by heating, the substance precipitated in the lower part is quickly and sufficiently melted, washed up to the upper part by the convection effect, and quickly mixed with the substance in the upper part having a lower melting point. For this purpose, it is preferable that the high-temperature heat medium that passes through the entire outer surface of the capsule 1 to store heat flow from the bottom to the top. In FIG. 1, the direction of the wind passing through the envelope 4 by the fan 5 is from the bottom to the top in order to cause the wind to collide with the lower surface of the capsule 1, thereby producing the above-mentioned effect. tri capsule 1
It is better for the cross section to be flat as shown in the figure. In this way, the distance between the lower material in the capsule 1 and the second material is shortened, and at the same time, the heat transfer area on the lower surface of the capsule 1 is increased. Rather than heating the top surface fully,
Another reason why it is better to heat the lower surface well is that an air layer 6 exists in the inner wall of the upper surface of the capsule 1, and heat transfer is not good. -! If the cross section of the capsule 1 is made into a flat shape, the heat dissipation will be done! When the latent heat storage material 2 solidifies and releases latent heat, the internal thermal resistance is small because it is thin, and therefore it is easy to extract a large amount of heat in a short time.

Further, in order to heat the lower surface of the capsule 1 well, it is necessary to make the lower surface of the capsule 1 easily contactable with the heat medium. For this purpose, it is important to prevent the top surface of the capsule 1 from coming into contact with the bottom surface of the capsule 1 located above it or the capsule holding member 3. -Also, it is better to make the opening of the capsule holding member 3 for holding the capsule 1 thick rather than making it thin.

FIG. 4 shows another embodiment of the heat storage device of the present invention, and FIG. 5 is a sectional view taken along the line BB' in FIG.

In this embodiment, the capsules 1 are horizontally arranged tir1' and f' at appropriate intervals on the capsule holding member 3 of one stage. The capsule 1 is placed at a position different from the longitudinal direction of the capsule 1, which is placed horizontally. By doing so, the flow of the heat medium is disturbed, and the heat at the cutting edge is evenly and well spread over the lower surface of the capsule 1 during heat storage.

FIG. 6 is a perspective view showing an enlarged main part of another embodiment of the heat storage device of the present invention. In this embodiment, the capsule holding member 3 consists of a plurality of rod-shaped bodies,
The capsule 1 is arranged in a direction different from the longitudinal gap of the capsule holding member 3.

In this case, the longitudinal gaps between the vertically adjacent capsule holding members 3 may be in the same direction, but it is better to have them in different directions as shown in FIG. 6.

In this way, the flow of the heat medium is disturbed as in the embodiments shown in FIGS. 4 and 5, and the lower surface of the capsule 1 is heated evenly and well.

FIG. 7 is a diagram showing the main parts of still another embodiment of the heat storage device of the present invention. In this embodiment, unlike the previous embodiment, the capsule 1 is placed on the capsule holding part 3.
Several bales (two bales in the embodiment shown in FIG. 7) are arranged horizontally at appropriate intervals in the longitudinal direction. In this case, although the number of capsules 1 increases, the contact with the heat medium is improved, and the heat storage and radiation efficiency is improved.

FIG. 8 also shows another embodiment of the heat storage device of the present invention. In this embodiment, the rod-shaped body 7 is arranged on the upper surface of the capsule 1 perpendicularly to the longitudinal direction of the capsule 1 in each of the above-mentioned embodiments, and the capsule 1 is arranged on the rod-shaped body 7. In this case, the position of the cell l placed on the rod-shaped body 7 is as follows:
When arranged in a staggered manner with respect to the position of the lower capsule l,
The lower surface of the capsule 1 is now well heated. In this case, the capsule 1 at the lower part of the rod-shaped body 7 is affected by the capsule 1 at the upper part, and in particular, the material of the capsule 1 is
If it is made of thin, soft vinyl, polyethylene, etc., there is a risk of it breaking. In order to prevent f″L, it is better to insert a sponge-like substance into the heat storage material 2 inside the capsule 1. However, the pores of this sponge-like substance (not shown) are preferably open pores, and independent air pores are preferable. i1 is capsule 1
Decrease in the heat storage capacity η'' of the heat storage material 2 in 'f3 Knee 1.Next.

Furthermore, since the latent heat storage material 2 is impregnated into the open pores of the sponge-like material, it becomes difficult to separate into two phases.

As explained above, according to the present invention, the heat storage material is not difficult to separate into two phases, and even if this occurs, it quickly recovers to its original substance, and the heat exchange performance is improved, resulting in latent heat storage. It is possible to effectively store and release heat by changing the phase of the material.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing one embodiment of the heat storage device of the present invention, FIG. 2 is a perspective view of the capsule in FIG. 1, FIG. 3 is a sectional view taken along line AA' in FIG. 2, and FIG. is a schematic sectional view showing another embodiment of the heat storage device of the present invention, and FIG. 5 is taken along the line B-B in FIG.
'A sectional view, FIGS. 6 and 7 are enlarged views of essential parts showing still another embodiment of the heat storage device of the present invention, and FIG. 8 is also a schematic sectional view showing still another embodiment of the heat storage device of the present invention. It is. DESCRIPTION OF SYMBOLS 1... Capsule, 2... Latent heat storage material, 3... Capsule holding member, 4... Envelope, butt... Fan, 6...
・Air layer. , Agent: Patent Attorney Toshiyuki Usuda ・ 1 year old, 1'4 days old, 5 years old, 611 years old, 1 day old, 8 years old

Claims (1)

[Claims] 1. A large number of latent heat storage material capsules are supported in an envelope, a heat medium is introduced into the envelope, and heat is exchanged between the heat medium and the heat storage material in the capsules. In the heat storage device, a plurality of capsule holding tηIS materials are installed horizontally in the envelope at predetermined intervals, and capsules with the heat storage material inserted therein are arranged horizontally on these capsule holding members. A heat storage device featuring: 2. The heat storage device according to item 1 of the patent application, characterized in that the heat medium is introduced from the lower surface side of the capsule. 3. The heat storage device according to claim 1 or 2, wherein the capsule has a flat cross section.