JP6432040B2 - Heat storage device - Google Patents

Description

  The present invention relates to a heat storage device using a latent heat storage material.

  Conventionally, as a heat storage device, as shown in FIG. 6, a heat storage member 11 in which a heat storage material is sealed in a container is arranged and filled in multiple layers in a casing, and a corrugated metal spacer 15 is interposed between the heat storage members 11. It is known that heat is stored by passing a heat medium between adjacent heat storage members 11 (see, for example, Patent Document 1).

Japanese Patent Publication No.58-55439

  In general, a heat storage device is designed to increase the amount of heat storage material in order to maximize the heat storage and heat dissipation performance while the volume of the device is constrained. It is necessary to increase the heat transfer area by increasing the number. Moreover, it is necessary to make the space | interval of each heat storage member small.

  However, in the conventional configuration, as the interval between the heat storage members becomes smaller, it is possible to form the heat medium flow path with a thin and uniform interval with the metal spacer on the wave over the entire surfaces of the adjacent heat storage members. It was difficult. For this reason, there existed a subject that the flow of a heat medium was unevenly distributed and heat transfer was not carried out well from the heat storage member whole surface.

  The present invention solves the above-described problem, and provides a heat storage device that can exchange heat evenly between the heat storage material and the heat medium while increasing the filling amount of the heat storage material while reducing the volume of the entire device as much as possible. The purpose is to provide.

In order to solve the conventional problem, a heat storage device according to the present invention includes a housing and a plurality of heat storage members provided in the housing and encapsulating a latent heat storage material in a bag-like container, and facing each other. and a partition plate provided between the heat storage member, said partition plate, possess a plane parallel to the principal flat portion of the heat storage member, and a projection which projects the heat storage member side from the flat portion The surface of the adjacent heat storage member and the flat portion of the partition plate are stacked in contact with each other without a gap, while the tip of the protrusion of the partition plate is stacked in contact with the surface of the heat storage member. Thus, a gap is formed in the vicinity thereof, and the gap is a flow path of a heat medium that exchanges heat with the heat storage member .

  As a result, the surface of the bag-like container enclosing the latent heat storage material is partially pushed away by the projections of the partition plate, and a flow path through which the heat medium passes is created in the vicinity thereof. On the other hand, in the flat part of the partition plate, the surface of the bag-like container is in contact with the partition plate without any gap, and the heat medium is not allowed to pass therethrough. With this configuration, it is possible to design a flow path through which the heat medium passes at an arbitrary place over the entire surface of the heat storage member. For this reason, the efficiency of heat exchange between the latent heat storage material and the heat medium can be improved.

  In the heat storage device of the present invention, a large amount of the latent heat storage material is ensured, and the flow of the heat medium is not unevenly distributed, so that heat exchange between the heat storage material and the heat medium is performed effectively.

Cross-sectional view of the configuration of the heat storage device in Embodiment 1 of the present invention Perspective view of partition plate in the heat storage device Sectional drawing of the partition plate in the heat storage device The figure explaining the heat storage device assembly method Sectional drawing of the partition plate in a modification Cross-sectional view of a conventional heat storage device

The first invention includes a housing, a plurality of heat storage members provided in the housing, in which a latent heat storage material is sealed in a bag-like container, and a partition plate provided between the heat storage members facing each other. , wherein the partition plate includes a plane parallel to the principal flat portion of the heat storage member, said have a from the flat portion and a projection which projects the heat storage member, wherein the surface of the adjacent heat storage member partition The flat portion of the plate is laminated in contact with the gap without any gap, and on the other hand, the tip of the projection of the partition plate is laminated on the surface of the heat storage member, so that a gap is formed in the vicinity thereof In addition, the gap is a flow path of a heat medium that exchanges heat with the heat storage member .

  As a result, the surface of the bag-like container enclosing the latent heat storage material is partially pushed away by the protrusion of the partition plate, and a flow path through which the heat medium passes is created in the vicinity thereof. On the other hand, in the flat part of the partition plate, the surface of the bag-like container is in contact with the partition plate without any gap, and the heat medium is not allowed to pass therethrough. With this configuration, it is possible to design a flow path through which the heat medium passes at an arbitrary place over the entire surface of the heat storage member.

  In the second invention, in particular, any one of the bag-like container of the heat storage member of the first invention is a metal thin film, a resin thin film, or a laminated film in which a metal thin film and a resin thin film are bonded together. By forming the container, the container surface is thin, high-strength, and has an appropriate flexibility. Do not allow the heating medium to pass along.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view showing a configuration of a heat storage device according to the first embodiment of the present invention. FIG. 1 is a cross-sectional view taken along a plane perpendicular to the flow direction of the heat medium. FIG. 2 is a perspective view of a partition plate provided in the heat storage device, and FIG. 3 is a cross-sectional view of the partition plate.

  As shown in FIG. 1, the housing | casing 4 is a container comprised with the metal or resin. In the interior, a plurality of heat storage members 1 and partition plates 2 are alternately stacked. The housing 4 is a sealed container in which a heat medium (for example, water or a refrigerant) that exchanges heat with the heat storage member 1 can flow, and an inlet portion (not shown) through which the heat medium flows; And an outlet (not shown) through which the heat medium flows out. In FIG. 1, the heat medium flowing in from the inlet portion flows in a direction perpendicular to the paper surface and flows out from the outlet portion.

  In the heat storage member 1, a latent heat storage material 1a is enclosed in a laminated film bag (bag-like container according to the present invention) 1b in which a metal thin film and a resin thin film are bonded together (see FIG. 4).

  2 and 3, the partition plate 2 is a substantially flat plate made of metal or the like, and includes a flat portion 2b that is parallel to the main surface of the heat storage member 1, and a flat portion. A plurality of protrusions 2 a protruding in the direction of the heat storage member 1 from 2 b are alternately provided. The protrusion 2a is formed over the entire width of the partition plate 2 in the flow direction of the heat medium (the arrow direction in FIG. 2).

  As shown in FIG. 3, the projecting portion 2a includes a first inclined surface 21 that forms an inclined surface that protrudes from the flat portion 2b to one side (upward in FIG. 3), and the other from the flat portion 2b (downward in FIG. 3). ) And the third inclined surface 23 connecting the first inclined surface 21 and the second inclined surface 22 to each other.

  The length (height) at which the first inclined surface 21 and the second inclined surface 22 protrude from the flat portion 2b is smaller than the length perpendicular to the heat medium flow direction of the flat portion 2b (interval between the protruding portions 2a). It is desirable that it is 1/2 or less. The first inclined surface 21 and the second inclined surface 22 are formed in parallel. The angle formed between the third inclined surface 23 and the flat portion 2b is larger than the angle formed between the first inclined surface 21, the second inclined surface 22 and the flat portion 2b. That is, the third inclined surface 23 is steeper than the first inclined surface 21 and the second inclined surface 22 with respect to the flat portion 2b. The third inclined surface 23 is preferably substantially perpendicular to the flat portion 2b.

  By stacking the heat storage members 1 and the partition plates 2 alternately adjacent to each other in the housing 4, the surfaces of the laminated film bags 1 b of the adjacent heat storage members 1 are pushed away by the protrusions 2 a of the partition plates 2. Thereby, the heat medium flow path 3 through which the heat medium flows is formed.

  Next, a method for assembling the heat storage device having the above-described configuration will be described with reference to FIG. FIG. 4A is a partial cross-sectional view showing a state before the heat storage member 1 and the partition plate 2 are stacked, and FIG. 4B shows a state after the heat storage member 1 and the partition plate 2 are stacked. It is a fragmentary sectional view shown. The latent heat storage material 1a is a heat storage agent that is solid below its melting point and liquid above the melting point. For this reason, in assembling the heat storage device, first, the heat storage member 1 in which a predetermined amount of the latent heat storage material 1a is sealed in the laminated film bag 1b and sealed is heated to the melting point or higher. In a state of being heated to the melting point or higher, the heat storage member 1 takes a free shape by the latent heat storage material 1a that has become a liquid, whereby the laminated film bag 1b follows the shape of the contacting object. However, the laminated film bag 1b does not completely follow the surface of the object depending on the degree of flexibility, but gently follows along the part where the shape changes suddenly.

  Next, the plurality of heat storage members 1 and the plurality of partition plates 2 are arranged alternately (see FIG. 4A). Then, it laminates | stacks so that force may be applied in the lamination direction and the adjacent heat storage member 1 and the flat part 2b of the partition plate 2 may contact | connect (refer FIG.4 (b)). At this time, the bag 1 b of the heat storage member 1 comes along the flat portion 2 b of the partition plate 2. That is, there is no gap between the surface of the heat storage member 1 and the flat portion 2b. On the other hand, the surface of the laminated film bag 1 b is in contact with the tip of the protrusion 2 a, but cannot follow the vicinity thereof, and a gap is formed between the partition plate 2 and the surface of the heat storage member 1. This gap becomes the heat medium flow path 3 through which the heat medium flows.

  The laminated heat storage member 1 and the partition plate 2 are housed in the housing 4 and have a predetermined configuration. Thereafter, the latent heat storage material 1a is brought to a temperature below the melting point, and the assembly is completed.

  About the thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In the heat storage operation for accumulating heat in the heat storage device or the heat radiation operation for extracting heat, the heat medium is passed through the heat medium flow path 3 to exchange heat with the heat storage member 1. Since the protrusion 2a is formed over the flow direction of the heat medium of the partition plate 2 (the arrow direction in FIG. 2), the heat medium flow path 3 has a tubular shape in the vicinity of the protrusion 2a. The medium can flow smoothly. The dimensions and pitch of the tubular heat medium flow path 3 can be designed to obtain a necessary heat transfer area according to the size of the heat storage member 1 and the flow rate of the heat medium.

  Accordingly, the dimensional accuracy of the laminated film bag 1b is not so accurate, but it is possible to increase the filling amount of the latent heat storage material 1a while taking a relatively large diameter of the heat medium passage 3. .

  Further, the number of protrusions 2a and the height thereof (the size of the protrusion 2a) can be determined independently, and as a result, the cross-sectional area of the heat medium passage 3 and its heat transfer area can be arbitrarily designed. . The tubular flow path may be determined so that the heat medium is easy to flow smoothly, and the dimension capable of maximizing the volume of the heat storage member 1 is determined in consideration of physical properties and flow rate.

  Moreover, the heat medium flow path 3 can be designed in arbitrary places over the whole surface of a thermal storage member. For example, the uneven distribution of the flow of the heat medium can be reduced by providing the projections 2a densely at locations where the heat medium does not easily flow in the housing 4 due to the positional relationship between the inlet portion and the outlet portion. For this reason, the efficiency of heat exchange between the latent heat storage material and the heat medium can be improved.

  Moreover, although the volume of the heat storage member can be increased as the cross-sectional area of the heat medium flow path 3 is smaller, the heat transfer area is reduced. However, due to the expansion effect of the heat transfer area due to the heat conduction of the partition plate 2, it is simply tubular. There is also an effect that the amount of heat transfer becomes larger than the circumference of the heat medium flow path 3. In this regard, when a thin uniform gap is formed as in the prior art, it is very difficult to flow the heat medium evenly, and the flow path cross-sectional area and the heat transfer area are determined by the gap interval dimension. This is a great advantage of the present embodiment in that each optimum design cannot be performed in consideration of the physical properties and flow rate of the heat medium.

  In the present embodiment, the third inclined surface 23 is steeper than the first inclined surface 21 and the second inclined surface 22 with respect to the flat portion 2b. Since the bag 1b is less likely to enter the space between the inclined surfaces 23 and the space between the second inclined surface 22 and the third inclined surface 23, a gap can be reliably provided in the vicinity of the protruding portion 2a.

  Moreover, in this Embodiment, since the height from the flat part 2b of the 1st inclined surface 21 and the 2nd inclined surface 22 is sufficiently smaller than the space | interval of the projection parts 2a, the adjacent heat carrier flow path 3 is connected. Can be prevented. That is, a plurality of independent heat medium flow paths 3 can be formed. Thereby, the uneven distribution of the flow of the heat medium in the housing 4 can be further reduced.

  As described above, in the present embodiment, the heat storage member 1 is designed by designing the arrangement of the protruding portions 2a and the flat portions 2b of the partition plate 2 by utilizing the appropriate flexibility of the laminated film bag 1b. The heat medium flow path 3 that realizes a good heat exchange relationship between the heat storage medium and the heat medium can be formed, and the heat storage of the entire heat storage member 1 can be used effectively without difficulty.

  In addition, while ensuring a large filling amount of the latent heat storage material, there is a high degree of freedom to systematically size and arrange the individual flow paths of the heat medium, so the heat medium flow is not unevenly distributed and effective. Heat exchange between the heat storage material and the heat medium is performed.

  In the present embodiment, the first inclined surface 21 and the second inclined surface 22 have the same height from the flat portion 2b, but may have different heights. Further, as a modification of the partition plate 2, as shown in FIG. 5, the protrusion provided in the partition plate is formed of a first inclined surface 21 and a third inclined surface 23 and does not include the second inclined surface 22. (See FIG. 5A). Moreover, the protrusion part which is formed of the second inclined surface 22 and the third inclined surface 23 and does not include the first inclined surface 21 may be used (see FIG. 5B).

  Further, the bag 1b is a laminated film in which a thin film of metal and resin is bonded, and has the durability to hold the latent heat storage material 1a inside and the flexibility to create a gap near the protrusion 2a. However, the present invention is not limited to this. For example, a metal thin film or a resin thin film may be used.

  As described above, since the heat storage device according to the present invention can effectively mount the latent heat storage material and obtain a large amount of heat storage with a small volume, it is applied to hot water heaters and hot water heaters for home use and business use. be able to.

DESCRIPTION OF SYMBOLS 1 Heat storage member 1a Latent heat storage material 1b Bag 2 Partition plate 2a Projection part 2b Flat part 3 Heat medium flow path 4 Housing | casing 21 1st inclined surface 22 2nd inclined surface 23 3rd inclined surface

Claims (2)

A housing, a plurality of heat storage members provided in the housing and encapsulating a latent heat storage material in a bag-like container, and a partition plate provided between the heat storage members facing each other, the partition plate, the major surface of the heat storage member and a parallel flat section, wherein possess a projection which projects the heat storage member side from the flat portion, the flat portion of the surface of the adjacent heat storage member and the partition plate On the other hand, the tip of the projection of the partition plate is in contact with and laminated on the surface of the heat storage member, so that a gap is formed in the vicinity thereof, and the gap Is a flow path of a heat medium that exchanges heat with the heat storage member . The bag-shaped container of the heat storage member is formed of any one of a metal thin film, a resin thin film, or a laminated film in which a metal thin film and a resin thin film are bonded to each other. The heat storage device described.