JPH0894270A - Heat storage device and heat exchanger using the heat storage device - Google Patents

Abstract

PURPOSE: To provide a heat storage device whose shape is easily deformable in conformity with the installation space of a heat exchanger and a heat exchanger which can be installed to a small space. CONSTITUTION: A heat storage device comprises a heat reservoir which is an aggregate of pellet-shaped particles 1a having a heat storage ability comprising amorphous resin and an organic group heat reserving material which is carried by the amorphous resin and phase-transfers reversibly between a solid and a liquid and a flexible tube 2 where the particles la are filled-up. A heat exchanger is provided with a flow passage 4 of a heating medium which is formed around the heat storage device and the tube 2 and placed in contact with the heat storage device and a vessel which houses the tube 2 in a curved state. The other heat exchangers serve as the flow passage 4 for the heating medium which places a cavity between the particles 1a of the heat storage device into contact with the heat reservoir.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage element comprising a heat storage body utilizing latent heat associated with a phase transition, and a heat exchanger equipped with this heat storage element.

[0002]

2. Description of the Related Art A shell-tube type heat exchanger is shown in FIG. 4 as a heat exchanger, and a housing 23 filled with a latent heat storage material 21 is provided with a pipe 24 for passing a heat medium. However, for example, a heat exchanger used for floor heating or the like is difficult to install because the installation location is a narrow space such as under the floor, and the area for heat exchange is limited by the surface area of the pipe 24. Therefore, there is a drawback that the rate of heat exchange is extremely slow.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and an object of the present invention is to accommodate a space in which a heat exchanger is installed and to easily change the shape of a heat storage element. Another object of the present invention is to provide a heat exchanger that can be installed in a narrow space.

Another object of the present invention is to provide a heat storage element having a high heat exchange rate and a heat exchanger.

[0005]

The heat storage element according to claim 1 of the present invention comprises an amorphous resin and an organic system supported by the amorphous resin which undergoes a reversible phase transition between solid and liquid. It is characterized by comprising a heat storage body 1 made of a heat storage material, which is an aggregate of pellet-like heat storage particles 1a, and a flexible tube 2 filled with the particles 1a.

A heat storage element according to a second aspect of the present invention is the heat storage element according to the first aspect, wherein the flexible tube 2 is used.
However, the ratio of the length to the square root of the cross-sectional area of this tube 2 is 1
It is characterized by being 0 or more.

A heat exchanger according to claim 3 of the present invention is a heat storage element according to claim 1 or 2, and a flow path 4 of a heat medium which is formed around the tube 2 and which contacts the heat storage element. as well as,
It is characterized by comprising a container 3 for accommodating the pipe 2 in a bent state.

A heat exchanger according to a fourth aspect of the present invention is characterized in that, in the heat exchanger according to the third aspect, the container 3 has flexibility and is bent.

In the heat exchanger according to claim 5 of the present invention, the space between the particles 1a of the heat storage element according to claim 1 or 2 is used as the flow path 4 of the heat medium which contacts the heat storage body 1. It is characterized by

[0010]

The heat storage element according to claim 1 or 2 of the present invention comprises an amorphous resin and a solid resin supported by the amorphous resin.
A heat storage body 1 made of an organic heat storage material that reversibly undergoes a phase transition between liquids, which is an aggregate of pellet-like heat storage particles 1a, and a flexible tube 2 filled with the particles 1a. Therefore, depending on the space that can accommodate the heat storage element, the pipe 2
Can be transformed into any shape.

In the heat exchanger according to claim 3 of the present invention, since the heat storage element can be housed in a bent state, it can be installed in a narrow space while maintaining heat exchange performance.

In the heat exchanger according to the fourth aspect of the present invention, since the heat exchanger accommodating the heat storage element has flexibility and is bent, when the heat exchanger is installed, it can be installed at a place where the heat exchanger is installed. The shape of the heat exchanger can be easily changed according to the space.

In the heat exchanger according to the fifth aspect of the present invention, the space between the particles 1a of the heat storage element is used as the flow path 4 for the heat medium, so that the heat exchanger bends into a free shape, and accordingly, the space can be accommodated depending on the space that can be accommodated. Shape can be easily transformed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings.

FIG. 1 (a) is a perspective view of a main part of a heat exchanger according to a first embodiment of the present invention with a part broken away, and FIG. 1 (b) is a cross-section taken in a cross direction with a flow of a heat medium. It is a plan
(C) is a longitudinal cross-sectional view of a main part, which is taken along the flow direction of the heat medium.

As shown in FIG. 1, the heat storage body 1 constituting the heat storage element of the present invention comprises an amorphous resin and an organic material carried by the amorphous resin, which undergoes a reversible phase transition between solid and liquid. It is an aggregate of particles 1a made of a system heat storage material and having a pellet-like heat storage property.

Examples of the amorphous resin include amorphous polyolefins. The amorphous polyolefins are
For example, an ethylene-α-olefin copolymer having a crystallinity of 40% or less and atactic polypropylene are suitable. As the α-olefin, propylene, butene-
1, pentene, hexene-1,4-methylpentene-
1, octene-1, etc., but not limited thereto. The organic heat storage material is preferably a substance having a property of reversibly undergoing a phase transition between solid and liquid, and having compatibility with the amorphous resin. The organic heat storage material is not particularly limited, but specifically, paraffin,
Hydrocarbons such as paraffin wax, isoparaffin, and polyethylene wax are listed. These may use only 1 type and may use 2 or more types together. When the heat storage body 1 contains an ethylene-α-olefin copolymer or a high-density polyethylene having a crystallinity of 40% or more as a resin together with the amorphous resin, the heat storage body 5
It is possible to increase the shape retention power of the. The blending ratio of the amorphous resin and the organic heat storage material is appropriately determined depending on the use of the heat storage body 1. For example, the amorphous resin is 10 to 70% by weight, and the organic heat storage material is 30 to 90% by weight. Appropriate.

The organic heat storage material can be supported on the resin by, for example, kneading at a temperature higher than the melting point of the resin with a kneader and molding the molten mixture into pellets. The pellet-shaped heat storage body 1 is not limited to a spherical shape, a square shape, a cylindrical shape, or the like. When the pellet-shaped heat storage body 1 is subjected to a chemical treatment on the surface to form a resin film or is encapsulated in a hollow resin body, the exudation of the resin is further suppressed, and This is preferable because the shape holding force of the heat storage body 1 becomes high.

In the heat storage element, the pellet-shaped particles 1a having heat storage properties are filled in the flexible tube 2,
It is enclosed. It is preferable that the particle 1a has a size of 5 mm or less because the shape of the flexible tube 2 can be easily deformed. Examples of the flexible tube 2 include resin tubes such as fluorine resin and nitrile resin. Further, the flexible tube 2 preferably has a length ratio (hereinafter referred to as an aspect ratio) of 10 or more with respect to a square root of a cross-sectional area. When the aspect ratio is 10 or more, the surface area of the tube 2 with respect to the volume is large, so that the heat exchange rate is high and the flexible tube 2 is provided.
The shape of is easily deformed. Further, the ratio of the length of the tube 2 to the size of the particles 1a is preferably 100 or more, and when the ratio is 100 or more, the shape of the tube 2 can be easily deformed.

The heat storage element is filled with a heat transfer promoting medium 5 together with the pellet-shaped particles 1a having heat storage properties,
Enclosed. It is desirable to fill the heat transfer promoting medium 5 because the speed of heat exchange is accelerated. The heat transfer promoting medium 5 is preferably liquid or powdery, which does not corrode the heat storage body 1 and the tube 2 or hinder easy deformation of the tube 2.
The powdery heat transfer promoting medium 5 is preferably 1/10 or less in size with respect to the size of the particles 1a.
Examples include various inorganic fillers, metal powders, and metal fibers.
Examples of the liquid heat transfer promoting medium 5 include various greases, water, ethylene glycol, propylene glycol and the like. These heat transfer accelerating media 5 are appropriately selected according to the operating temperature and the like.

The heat exchanger of the present invention comprises the heat storage element, the flow path 4 of the heat medium formed around the tube 2, and the container 3 for housing the tube 2. The heat medium comes into contact with the tube 2 and exchanges heat. Examples of this heat medium include various liquids such as water, ethylene glycol, propylene glycol, and aqueous solutions thereof, and various gases such as air and steam. As shown in FIG. 1A, the container 3 also has flexibility. When the container 3 has flexibility, the heat exchanger accommodating the heat storage element can be bent into a free shape, and therefore, when the heat exchanger is installed, the heat exchanger can be installed depending on the space of the installation place. The shape of the heat exchanger can be easily changed.

The heat exchanger of the present invention is not limited to the above embodiment. First, both the tube 2 and the container 3 may be flexible as in the embodiment, or only the tube 2 may be flexible. FIG. 2 shows a perspective view of a main part of the heat exchanger according to the second embodiment of the present invention, which is partially broken. As shown in FIG. 2, the heat exchanger is housed in a cylindrical container 3 with the flexible tube 2 bent in a spiral shape. In the present invention, since the tube 2 filled with the heat storage body 1 bends into a free shape,
The space for installing the heat exchanger is small, and the heat exchanger container 3
Even if the size cannot be increased, the tube 2 can be deformed according to the size of the container 3. Further, when the tube 2 is bent, the surface area of the tube 2 that is heat-exchanged can be increased, so that the heat exchange can be speeded up.

The heat exchange between the heat medium and the heat storage body 1 is not limited to the case where the tube 2 is interposed. Next, a third embodiment of the present invention will be shown. FIG. 3A is a perspective view of a main part of a heat exchanger according to a third embodiment of the present invention, in which a part is broken, and FIG. Yes, (c) is a longitudinal cross-sectional view of a main part, which is taken along the flow direction of the heat medium.

As shown in FIG. 3, the heat exchanger uses the space between the particles 1a of the heat storage element as the flow path 4 for the heat medium to carry out heat exchange while directly contacting the heat storage body 1. The heat medium is supplied from one end and discharged from the other end of the tube 2, during which heat exchange is performed. Since the heat storage body 1 is composed of the above-mentioned amorphous resin and the organic heat storage material, the heat medium can be brought into direct contact. In the heat exchanger of the present invention, since the flexible pipe 2 is filled with the heat storage body 1 in which the flow path 4 of the heat medium is formed, when the heat exchanger is installed, the space of the place where the heat exchanger is installed is set. Accordingly, the shape of the heat exchanger can be easily changed by bending the tube 2.

As described above, the heat exchanger of the present invention can easily change the shape of the heat storage element in correspondence with the space in which the heat exchanger is installed.

[0026]

In the heat storage element according to the first or second aspect of the present invention, the heat storage body 1 is an aggregate of particles 1a having a pellet-like heat storage property, and the particle 1a is a flexible tube. Since 2 is filled, the tube 2 can be formed into any shape depending on the space that can accommodate the heat storage element.

In the heat exchanger according to the third aspect of the present invention, since the heat storage element can be housed in a bent state, it can be installed in a narrow space while maintaining the heat exchange performance.

In the heat exchanger according to the fourth aspect of the present invention, since the heat exchanger accommodating the heat storage element has flexibility and bends, the heat exchanger can be installed in any shape depending on the space that can be accommodated.

In the heat exchanger according to the fifth aspect of the present invention, the space between the particles 1a of the heat storage element is used as the flow path 4 for the heat medium, so that the heat exchanger is bent into a free shape, so that it can be accommodated depending on the space that can be accommodated. Shape can be easily transformed.

Therefore, the heat exchanger of the present invention is effective when installed in a narrow space such as under the floor.

[Brief description of drawings]

FIG. 1 (a) is a perspective view of a main part of a heat exchanger according to a first embodiment of the present invention with a part broken away, and FIG. 1 (b) is a cross-sectional view taken in a cross direction with a flow of a heat medium. It is a figure and (c) is a principal part longitudinal cross-sectional view which crossed in the flow direction of a heating medium.

FIG. 2 is a partial perspective view of a heat exchanger according to a second embodiment of the present invention with a part thereof broken away.

FIG. 3 (a) is a perspective view of a main part of a heat exchanger according to a third embodiment of the present invention with a part broken away, and FIG. 3 (b) is a cross-sectional view taken in a cross direction with a flow of a heat medium. It is a figure and (c) is a principal part longitudinal cross-sectional view which crossed in the flow direction of a heating medium.

FIG. 4 is a cross-sectional view of a conventional heat exchanger.

[Explanation of symbols]

 1 heat storage body 1a particle 2 tube 3 container 4 flow path

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Kudo 1048 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Inventor, Ryo Sugawara 1048, Kadoma, Kadoma City, Osaka 72) Inventor Kenji Tsubaki Matsuda Electric Works Co., Ltd. 1048 Kadoma, Kadoma City, Osaka Prefecture

Claims (5)

[Claims] 1. Pellet-like particles (1a) having a heat storage property, which are composed of an amorphous resin and an organic heat storage material which is carried on the amorphous resin and undergoes a reversible phase transition between solid and liquid. A heat storage element comprising a heat storage body (1), which is an assembly of the above, and a flexible tube (2) filled with the particles (1a). 2. The heat storage element according to claim 1, wherein the ratio of the length of the flexible tube (2) to the square root of the cross-sectional area of the tube (2) is 10 or more. 3. The heat storage element according to claim 1 or 2,
A flow path (4) for a heat medium, which is formed around the pipe (2) and is in contact with the heat storage element, and a container (3) for accommodating the pipe (2) in a bent state. And a heat exchanger. 4. The heat exchanger according to claim 3, wherein the container (3) according to claim 3 has flexibility and is bent. 5. A flow path (4) for a heat medium for exchanging heat with the heat storage body (1), wherein the space between the particles (1a) of the heat storage element according to claim 1 or 2 is used. Heat exchanger.