JP6962754B2 - Floor structure with heat storage unit and heat storage unit - Google Patents

Description

The present invention relates to a heat storage unit provided with a heat storage material using a latent heat storage material and a floor structure provided with the heat storage unit.

In recent years, from the viewpoint of environmental friendliness, in the technical field of building materials such as flooring materials, wall materials, ceiling materials, roofing materials, etc., in order to more effectively utilize the thermal energy generated during indoor heating and natural energy such as solar radiation. Research and development are active, and energy saving and eco-friendly measures are being taken based on these research and development.

Specifically, a technique for installing a heat storage body using a heat storage material has been developed on a building part such as a floor, a wall (inner wall, outer wall), a ceiling, and a roof. For example, a technique of installing a heat storage material on the floor is known.

Patent Document 1 is a heat storage floor structure having a heat storage material, in which a heat insulating material is provided in a floor panel constituting the floor, and a ventilation joist having a ventilation portion is arranged in the shape of the floor panel. A floor heating panel capable of generating heat is laid on the ventilation joists, and between the floor heating panel and the floor panel, a heat storage material, a hot air passage, and the hot air passage are connected to and warm air flows in. A heat storage floor structure is disclosed, which is characterized in that a hot air introduction portion is provided.

Patent Document 2 is characterized in that the heat collecting air is introduced to the back surface side of the floor surface material by a duct, and the latent heat storage material is arranged in the vicinity of the back surface side of the floor surface material so that the heat collecting air comes into contact with the heat storage material. The floor structure is disclosed.

In addition, a technique for incorporating a latent heat storage material into the floor material itself has also been developed. For example, in Pat. A flexible encapsulation container made of a heat transfer material, which is housed in a state of being and filled with a latent heat storage material, and the container is attached so that the upper surface thereof is pressed against the inner bottom surface of the recess so that heat can be transferred. A latent heat storage floor material is disclosed, which comprises a vigorous cushioning material.

On the other hand, in order to increase the amount of heat storage and the amount of heat radiation of the heat storage body using the latent heat storage material, it is considered effective to install a combination of a plurality of heat storage bodies in the building. For example, in Patent Document 4, in a heat storage device in which a heat storage body is housed inside a box-shaped heat storage tank, in the heat storage tank, the heat storage plate portion having a horizontal plate shape as the heat storage body is placed in a horizontal state. It is disclosed that the lateral air flow paths that spread are arranged in a laminated manner at predetermined intervals so as to form between them. In Patent Document 4, as the heat storage plate portion, a latent heat storage material is placed in a resin container such as polyethylene or a metal container having a long side length of about 290 mm, a short side length of about 195 mm and a thickness of about 20 mm. A heat storage plate formed by enclosing the above is disclosed. Patent Document 4 discloses that a plurality of the heat storage plates are laminated in the thickness direction via a heat storage plate support member to form the lateral air flow path between the plurality of heat storage plates. ..

In addition, a heat storage body for the purpose of storing warm temperature by melting or heat dissipation by solidification required in winter, and a heat storage body for storing cold temperature by solidification or absorbing warm temperature by melting required in summer. The suitable phase change temperature range is different. Therefore, Patent Document 5 discloses a composite heat storage material in which at least two types of latent heat storage materials are filled in one container.

JP-A-2009-103352 JP-A-2002-195587 Japanese Unexamined Patent Publication No. 2012-77492 Japanese Unexamined Patent Publication No. 2014-228207 Japanese Unexamined Patent Publication No. 2004-232897

As described in Patent Documents 1 to 3, when a heat storage body is incorporated in the floor structure to form a heat storage floor structure, it is usual that the floor structure is provided with a structure for installing the heat storage body. In particular, when a heat storage body containing a bag body and a latent heat storage material housed in the bag body is used as the heat storage body, the heat storage body may be installed on a separately prepared installation table, or a floor as in Patent Document 3. Conventionally, a recess is provided in the material itself to accommodate the heat storage body. When a heat storage body containing the bag body and the latent heat storage material housed in the bag body is incorporated into the floor structure, the installation position of the heat storage body is restricted, the floor structure is complicated, which is disadvantageous in terms of space saving and cost reduction. There is room for improvement in terms of such things as.

On the other hand, as described in Patent Document 4, the heat storage plate formed by enclosing the latent heat storage material in a resin container or a metal container has rigidity in itself, and therefore, the heat storage plate itself has rigidity, and therefore, the heat storage plate is interposed through the heat storage plate support member. A plurality of layers can be stacked and installed at a target position in the heat storage tank. However, such a heat storage plate is expensive as compared with a heat storage body including a bag body and a latent heat storage material housed in the bag body, and it is difficult to change the amount of the latent heat storage material. It is not desirable in that it is not easy to change the size and shape of the plate.

Therefore, the present invention has a problem to be solved that the heat storage body including the bag body and the heat storage material composition contained in the bag body is in a form that can be easily installed in a building part such as a floor structure. do.

The heat storage unit of the present invention developed in view of the above problems is
A heat storage body including a bag body and a heat storage material composition containing a latent heat storage material contained in the bag body, and
A heat storage panel including a frame body that supports one or more of the heat storage bodies, and
It is characterized by including a leg portion that engages with one or more portions of the frame body of the heat storage panel and holds one or more postures of the heat storage panel.

By adopting the form of the heat storage unit of the present invention, it is possible to maintain the posture of the heat storage body including the bag body and the heat storage material composition containing the latent heat storage material contained in the bag body. Therefore, the heat storage unit of the present invention is inexpensive by using a heat storage body including a bag body and a heat storage material composition containing a latent heat storage material contained in the bag body as the heat storage body. When incorporating the heat storage unit of the present invention into the floor structure while retaining the advantages of the heat storage body such as easy change in the amount of material and easy change in size and shape, it is necessary to prepare a separate installation stand. In addition, it has a particularly advantageous effect that no special installation site is required for the members of the floor structure.

In a preferred embodiment of the heat storage unit of the present invention,
The frame body supports a plurality of the heat storage bodies, and the frame body supports a plurality of the heat storage bodies.
The phase change temperature of the latent heat storage material in at least one of the plurality of heat storage bodies supported by the frame is different from the phase change temperature of the latent heat storage material in the other heat storage body.

In this aspect of the heat storage unit of the present invention, heat storage and heat dissipation performance can be achieved in a wide temperature range by providing a plurality of heat storage bodies including latent heat storage materials having different phase change temperatures. Further, as an individual heat storage body, a heat storage body containing a latent heat storage material having one phase change temperature can be used, and a plurality of latent heat storage materials having different phase change temperatures as described in Patent Document 5 can be used. There is no need to use a special combined heat storage body.

In another preferred embodiment of the heat storage unit of the present invention,
Equipped with the plurality of the heat storage panels
The phase change temperature of the latent heat storage material in the heat storage body included in at least one of the heat storage panels is different from the phase change temperature of the latent heat storage material in the heat storage body provided in the other heat storage panel. ..

In this aspect of the heat storage unit of the present invention, the heat storage and heat dissipation performance can be achieved in a wide temperature range by providing a plurality of heat storage panels including heat storage bodies including latent heat storage materials having different phase change temperatures. Further, as an individual heat storage body, a heat storage body containing a latent heat storage material having one phase change temperature can be used, and a plurality of latent heat storage materials having different phase change temperatures as described in Patent Document 5 can be used. There is no need to use a special combined heat storage body.

In another preferred embodiment of the heat storage unit of the present invention,
An opening portion penetrating in the thickness direction is formed in the frame body.
The heat storage body is housed in the opening portion so that at least a part of the heat storage material composition protrudes from the frame body in the thickness direction of the frame body from the opening portion.

In this aspect of the heat storage unit of the present invention, at least a part of the heat storage material composition of the heat storage body protrudes from the frame body, so that heat is exchanged with air flowing in a direction along the surface of the heat storage panel. Can be done efficiently.

In another preferred embodiment of the heat storage unit of the present invention,
The bag body of the heat storage body contains a metal film.

In this aspect of the heat storage unit of the present invention, the bag body containing the heat storage material composition containing the latent heat storage material contains a metal film, so that heat can be efficiently exchanged with the surrounding air through the metal film. It can be carried out.

In another preferred embodiment of the heat storage unit of the present invention,
The heat storage panel is held by the legs so that the heat storage panel and the horizontal surface are separated from each other when installed on a horizontal surface.

When the heat storage unit of the present invention according to this aspect is installed on the floor base surface, a space is formed between the floor base surface and the heat storage panel, and a cord, a cable, or the like can crawl in this space.

In another preferred embodiment of the heat storage unit of the present invention,
A plurality of the heat storage panels held by the legs with a gap in between.
Each of the voids is a space that extends along at least one direction and is open to the outside at both ends of the direction.

In this aspect of the heat storage unit of the present invention, air can flow along the direction in the voids formed between the heat storage panels, and heat can be efficiently exchanged between the heat storage body and the air. ..

In a more preferred embodiment of this aspect of the heat storage unit of the present invention,
When installed on a horizontal surface
Each of the plurality of heat storage panels is substantially perpendicular to the horizontal direction.
The plurality of heat storage panels are held by the legs so that each of the voids extends along the horizontal direction and becomes a space open to the outside at both ends in the horizontal direction.

In this more preferred embodiment of the heat storage unit of the present invention, the heat in the air flow in the underfloor space can be efficiently stored. In addition, in this specification, "substantially vertical" also includes "vertical".

The present invention also
The floor structure arranged above the floor base surface with the underfloor space separated,
The present invention relates to a floor structure including the above-mentioned heat storage unit according to the present invention, which is installed on the floor base surface.

In the floor structure of the present invention, hot or cold heat can be stored in the underfloor space. Since the above-mentioned heat storage unit according to the present invention can independently maintain the posture of the heat storage body, the floor structure of the present invention can be constructed by installing the heat storage unit on the floor base surface, and the mechanism is simple. It is easy to reduce the cost.

In a preferred embodiment of the floor structure of the present invention,
When the heat storage unit is installed on a horizontal plane, each of the plurality of heat storage panels is substantially perpendicular to the horizontal direction, and each of the voids extends along the horizontal direction, and both ends in the horizontal direction. A heat storage unit in which a plurality of the heat storage panels are held by the legs so as to form a space open to the outside.
The heat storage unit is such that each of the heat storage panels is substantially perpendicular to the floor base surface, and each of the voids extends along the horizontal direction to form a space open to the outside at both ends in the direction. Is installed on the floor base surface.

The air flow flowing in the underfloor space tends to be an air flow that spreads in the horizontal direction and has a small thickness in the vertical direction. According to this aspect of the floor structure of the present invention, the air flow can pass through the gaps between the plurality of heat storage panels included in the heat storage unit, so that the heat in the air flow flowing in the underfloor space can be efficiently stored. can do.

In another preferred embodiment of the floor structure of the present invention,
Further equipped with an airflow supply device that supplies an air flow to the underfloor space,
The heat storage composition in the heat storage body included in the heat storage unit has a latent heat storage having a phase change temperature of 2 ° C. or more lower than the temperature of the air flow supplied from the airflow supply device at the location where the heat storage unit is installed. Including wood.

According to this aspect of the floor structure of the present invention, the heat of warm air can be efficiently stored. For this reason, in winter, when the load of the air conditioner (indoor / outdoor temperature difference) is small (daytime, etc.), the heating by the air conditioner is operated to store warm air in the underfloor space, and during the time when the load is heavy (early morning, etc.). The heating by the air conditioner can be stopped and the heat stored in the underfloor space can be used.

In another preferred embodiment of the floor structure of the present invention,
Further equipped with an airflow supply device that supplies an air flow to the underfloor space,
The heat storage composition in the heat storage body included in the heat storage unit has a latent heat storage having a phase change temperature of 2 ° C. or more higher than the temperature of the air flow supplied from the air flow supply device at the location where the heat storage unit is installed. Including wood.

According to this aspect of the floor structure of the present invention, cold air can be efficiently stored. Therefore, it is possible to store cold air at night and in the morning in the middle period such as spring and autumn, and to use the cold air stored in the underfloor space at the time of high temperature in the daytime.

In another preferred embodiment of the floor structure of the present invention,
The floor structure comprises a plurality of laid floor panels.
At least one of the plurality of floor panels is removable
The dimension of the heat storage unit in the plan view is smaller than the dimension in the plan view of the opening of the underfloor space formed when one of the removable floor panels is removed.

In this aspect of the floor structure of the present invention, the heat storage unit can be easily attached to and detached from the floor base surface through the opening of the underfloor space formed by removing the floor panel. Therefore, for example, when wirings such as cords and cables are installed on the floor base surface and the heat storage unit is arranged on the wirings, it is easy to perform maintenance of the wirings.

The present invention also
A method of storing warm air using the heat storage unit according to one or more of the above aspects of the present invention.
Provided is a method including bringing the heat storage unit into contact with air having a temperature higher than 2 ° C. or more with respect to the phase change temperature of the latent heat storage material contained in the heat storage composition in the heat storage body included in the heat storage unit.

In this method, warm air can be efficiently stored by bringing the heat storage unit into contact with air having a temperature higher than the phase change temperature of the latent heat storage material by 2 ° C. or more.

The present invention also
A method of storing cold air using the heat storage unit according to one or more of the above aspects of the present invention.
Provided is a method including bringing the heat storage unit into contact with air having a temperature lower than 2 ° C. or more with respect to the phase change temperature of the latent heat storage material contained in the heat storage composition in the heat storage body included in the heat storage unit.

In this method, cold air can be efficiently stored by bringing the heat storage unit into contact with air having a temperature lower than the phase change temperature of the latent heat storage material by 2 ° C. or more.

The heat storage unit of the present invention is advantageous because it is not necessary to separately prepare an installation stand or to form a special installation site on the member of the floor structure when incorporating the heat storage unit into the floor structure.

The floor structure of the present invention can store hot or cold heat in the underfloor space.

It is a top view of the 1st Embodiment of the heat storage panel used for the heat storage unit of this invention. FIG. 5 is a cross-sectional view taken along the line I-I of the heat storage panel shown in FIG. It is a schematic disassembled perspective view of the 1st Embodiment of the heat storage unit of this invention. It is a schematic perspective view of the 1st Embodiment of the heat storage unit of this invention. It is a side view of the 1st Embodiment of the heat storage unit of this invention shown in FIG. FIG. 6 is a schematic cross-sectional view of a first embodiment of the floor structure of the present invention including the heat storage unit of the present invention shown in FIG. FIG. 6 is a schematic plan view in a state where one of the floor panels is removed in the embodiment of the floor structure of the present invention shown in FIG. It is a schematic perspective view of the 2nd Embodiment of the heat storage unit of this invention. It is a schematic perspective view of the 3rd Embodiment of the heat storage unit of this invention. 9 is a schematic cross-sectional view of a second embodiment of the floor structure of the present invention including the heat storage unit of the present invention shown in FIG.

Hereinafter, the heat storage unit and its use according to the first embodiment, the second embodiment, and the third embodiment of the present invention will be described with reference to FIGS. 1 to 10. However, the scope of the present invention is not limited to the illustrated embodiment.

<1. Heat storage unit according to the first embodiment>
As shown in FIGS. 1 to 5, the heat storage unit 1 according to the first embodiment of the present invention includes a heat storage panel 10 including four heat storage bodies 11 and a frame body 12 supporting the four heat storage bodies 11, and three heat storage panels 10. A leg portion 20 that engages with a portion of each frame 12 of the heat storage panel 10 and holds the posture of the three heat storage panels 10 is provided.

1.1. Heat storage panel The heat storage panel 10 includes a heat storage body 11 and a frame body 12.

1.1.1. Heat storage body The heat storage body 11 includes a bag body 14 and a heat storage material composition 13 containing a latent heat storage material contained in the bag body 14.

The heat storage material composition 13 may be housed in the bag body 14 alone, or may be housed in the bag body 14 in the form of being impregnated with the base material. As the base material impregnating with the heat storage material composition 13, a plate-shaped base material can be exemplified. The first embodiment shown is an example in which the heat storage material composition 13 is housed in the bag body 14 in the form of being impregnated with the base material.

The latent heat storage material that can be used in the present invention is, for example, a latent heat storage material that undergoes a phase change from a solid phase to a liquid phase due to indoor heating, heat from sunlight, etc., and the phase change temperature (melting point) is preferably 5 ° C. It is in the range of ~ 60 ° C., more preferably 15 ° C. or higher, more preferably 18 ° C. or higher, more preferably 35 ° C. or lower, more preferably 28 ° C. or lower, and more preferably 15 ° C. to It is in the range of 35 ° C, more preferably in the range of 18 ° C to 28 ° C. In the present specification, the phase change temperature and the melting point refer to the values at 1 atm. The phase change temperature is also called the phase transition temperature.

For example, in the summer, for the purpose of storing the cold temperature of air cooled by air conditioning, shaded air, or nighttime air and absorbing the heat when the room temperature is high, the room temperature is higher than the cold temperature and should be lowered. It is preferable to use a latent heat storage material having a phase change temperature lower than that. Examples of such a phase change temperature include 22 to 28 ° C. Also, in winter, for the purpose of storing the warm temperature of the air warmed by heating, the sun's air, or the daytime air and dissipating it when the temperature drops, it is lower than the warm temperature and lower than the low room temperature to be raised. It is preferable to use a latent heat storage material having a high phase change temperature. Examples of such a phase change temperature include 18 to 26 ° C.

The latent heat storage material is composed of at least one selected from the group consisting of n-hexadecane, n-heptadecane, n-octadecan, and n-nonadecan (may be a mixture of two or more) or the like. Saturated aliphatic hydrocarbons such as n-paraffin and paraffin wax (preferably linear saturated aliphatic hydrocarbons) containing at least one of the above and typically having carbon atoms in the range of 16 to 24 carbon atoms; It is composed of at least one selected from the group consisting of 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene and the like (may be a mixture of two or more kinds) or the above. A monovalent or polyvalent non-valent compound such as an α-olefin (preferably a linear α-olefin) containing at least one compound, typically having a carbon number in the range of 16 to 26 (preferably 24 or less). Saturated aliphatic hydrocarbons (preferably linear monovalent or polyvalent unsaturated aliphatic hydrocarbons); at least one (two) selected from the group consisting of octanoic acid, capric acid, lauric acid, and myristic acid. A medium chain composed of (may be a mixture of the above) or the like, or containing at least one of the above, typically having a carbon number in the range of 6 to 24 carbon atoms, preferably 8 to 14 carbon atoms. Alternatively, a long-chain fatty acid; an ester of the above fatty acid; a polyether compound such as polyethylene glycol (for example, a molecular weight of 500 to 1000); an inorganic salt such as sodium sulfate hydrate, calcium chloride hydrate, sodium sulfate decahydrate and the like. be able to. Preferably, the latent heat storage material is selected from the group consisting of the saturated aliphatic hydrocarbon, the monovalent or polyunsaturated aliphatic hydrocarbon, the medium-chain or long-chain fatty acid, the ester of the fatty acid, and the polyether compound. It is one kind or a mixture of two or more kinds.

In addition to the above, the heat storage material composition 13 containing the latent heat storage material used in the present invention may be a composition that becomes gel-like at a phase change temperature or higher. Since the heat storage material composition 13 that becomes gel-like at the phase change temperature or higher can retain its shape without being impregnated with the base material, it is particularly preferable in a form in which the heat storage material composition 13 is not impregnated with the base material. Available.

Further, as disclosed in International Publication 2015/174523 already filed by the applicant, a heat storage material composition containing a latent heat storage material and a hydrogenated styrene-based thermoplastic elastomer may be used as the heat storage material composition 13. .. Examples of the hydrogenated styrene-based thermoplastic elastomer include styrene-ethylene / butylene-styrene block copolymer (SEBS), styrene-ethylene / propylene block copolymer (SEP), and styrene-ethylene / propylene-styrene block copolymer (SEBS). SEPS), and at least one selected from the group consisting of styrene-ethylene-ethylene / propylene-styrene block copolymer (SEEPS) (may be a mixture of two or more) and the like.

When the heat storage material composition 13 is in the form of being impregnated with the base material, the base material may be a base material that can impregnate and hold the latent heat storage material, and specifically, the base material is impregnated with the latent heat storage material. It may be a porous base material containing a material having fine voids that can be retained, and the material is not limited.

Examples of the material of the base material include wood-based boards such as particle board and wood fiber board (MDF, insulation board, hard board, etc.). In addition to this, inorganic boards such as gypsum boards and calcium silicate boards; mineral boards in which mineral substances are molded into a board shape; boards in which inorganic fibers such as glass wool, carbon fiber, and metal fibers are accumulated can be mentioned. can.

The shape of the base material impregnated with the heat storage material composition 13 is not particularly limited, but is usually plate-shaped. In the case of a plate-shaped base material, the thickness thereof is not particularly limited, but is usually 3 to 30 mm, preferably 5 to 20 mm. When the heat storage material composition 13 is impregnated in the plate-shaped base material, it is preferable that the heat storage material composition 13 is impregnated over the entire thickness direction of the plate-shaped base material, but the present invention is not limited to this. The heat storage material composition may be impregnated only in the surface layer portion of the plate-shaped base material. The shape of the plate-shaped base material and the heat storage material composition 13 impregnated in the base material is not particularly limited, and in the illustrated embodiment, it is substantially square in a plan view, but has the following features. In the plan view, the shape is not particularly limited, such as a rectangular shape, a circular shape, an elliptical shape, and a polygonal shape.

The shape of the cross section of the plate-shaped base material and the heat storage material composition 13 impregnated in the base material in the thickness direction is not particularly limited. As shown in the figure, when the heat storage material composition 13 impregnated in the base material is sealed in the bag body 14, the side of the first surface 13a is pressed against the first sheet 14A constituting the bag body 14, and the first When the sheet 14A is deformed so as to follow the shapes of the first surface 13a and the side surface 13b of the heat storage material composition 13 impregnated in the base material to form the accommodating portion 14C protruding outward, the base material is used. The first surface 13a and the side surface 13b have an obtuse angle on the inside so that the ridge line portion 13c where the first surface 13a and the side surface 13b of the heat storage material composition 13 impregnated with the heat storage material composition intersect does not damage the first sheet 14A from the inside. It is preferable that it is formed so as to form. Further, the corner portion 13e (see FIG. 1) on the side of the first surface 13a of the heat storage material composition 13 impregnated in the base material does not damage the first sheet 14A from the inside, and the first sheet material 14A However, when the heat storage material composition 13 is incorporated, the shape is notched so as to fit the shape of the heat storage composition 13 so as not to generate large wrinkles or the like that cause poor adhesion to the joint portion 14D described later. preferable.

In the first embodiment, the bag body 14 is formed by joining the first sheet material 14A and the second sheet material 14B by a joint portion 14D surrounding the heat storage material composition 13. The first sheet 14A is formed with a housing portion 14C having a protruding shape so as to house the heat storage material composition 13.

In the first embodiment, the material constituting the bag body 14 (material constituting the first sheet material 14A and the second sheet material 14B) has impermeableness to the heat storage material composition 13 and is a heat storage material composition. The latent heat storage material contained in No. 13 is not particularly limited as long as it is a material capable of preventing leakage even if it is liquefied at a temperature higher than the phase change temperature. The bag body 14 is preferably made of a flexible material. For example, the material constituting the bag body 14 includes a thermoplastic resin film such as polypropylene resin, polyvinyl chloride resin, polycarbonate resin, nylon resin, polyethylene resin, polyethylene terephthalate resin (PET resin), and a metal film such as aluminum foil. However, it may be a laminated film in which these are laminated. When the bag body 14 contains a metal film, the metal film has high heat transfer properties, so that the heat storage material composition 13 can efficiently exchange heat with the surrounding air through the bag body 14. When the bag body 14 is composed of the first sheet material 14A and the second sheet material 14B, the first sheet material 14A and the second sheet material 14B may contain different materials. For example, in the illustrated embodiment, the first sheet material 14A is a light-transmitting thermoplastic resin film, and the second sheet material 14B is a laminated film in which a metal film and a thermoplastic resin film are laminated.

When the bag body 14 contains the first sheet material 14A and the second sheet material 14B, the bonding between the first sheet material 14A and the second sheet material 14B is when each contains a thermoplastic resin on the inner side surface. Can be joined by heat fusion, but the present invention is not limited to this, and for example, the first sheet material 14A and the second sheet material 14B may be joined via an adhesive. The illustrated example is an example in which the first sheet material 14A and the second sheet material 14B are heat-sealed to form the joint portion 14D.

In the illustrated embodiment, a pair of the first sheet material 14A and the second sheet material 14B form a plurality of (four in the illustrated example) bag bodies 14, each of which houses and encloses the heat storage material composition 13. By doing so, a plurality of connected heat storage bodies 11 are formed. With this configuration, it is possible to efficiently form a plurality of heat storage bodies 11. However, the present invention is not limited to this example, and the bag bodies 14 included in the plurality of heat storage bodies 11 may be independent of each other.

1.1.2. Frame body The frame body 12 is a member forming the skeleton of the heat storage panel 10 that supports one or more heat storage bodies 11. The shape of the heat storage body 11 may change depending on whether the temperature is higher or lower than the phase change temperature of the latent heat storage material contained in the heat storage material composition 13 in the bag body 14, but the heat storage body 11 is supported by the frame body 12. By doing so, the shape of the heat storage panel 10 as a whole is maintained regardless of the shape change of the heat storage body 11. Further, as will be described later, the leg portion 20 engages with the frame body 12.

As shown in the figure, the frame body 12 can have an overall shape having a spread along a plane, and one or more (four in the illustrated example) heat storage bodies 11 can be supported along the plane. It is configured so that it can be done.

In the present embodiment, the frame body 12 is formed so as to bridge between the peripheral edge portion 12A forming the contour of the peripheral edge and the pair of opposing portions of the peripheral edge portion 12A in a plan view (2 in the illustrated example). (1) Bridged portions 12B, 12B, and a plurality of (four in the illustrated example) opening portions 12C, 12C, 12C penetrating in the thickness direction between the peripheral portion 12A and the crosslinked portions 12B, 12B. , 12C are formed.

The frame body 12 can be formed of a material whose shape and dimensions are substantially stable in the normal use environment of the heat storage unit 1, and examples of the material include wood, metal, and resin.

The frame body 12 can engage with the legs 20 to maintain the posture of the heat storage panel 10. The structure for engaging with the leg portion 20 in the frame body 12 will be described later.

11.3. Overall configuration of the heat storage panel One or more heat storage bodies 11 are supported by the frame body 12 to form the heat storage panel 10. The planar shape of the heat storage panel 10 can be rectangular as shown, but is not limited to this, and may be any shape such as a polygon such as a circle, an ellipse, a triangle, a pentagon, or a hexagon. It may be there.

The mode of the heat storage body 11 is not particularly limited as long as it is supported by the frame body 12. For example, a part of the bag body 14 of the heat storage body 11 and a part of the frame body 12 may be connected via an adhesive or may be connected via a fixing member such as a nail.

In the illustrated example, the heat storage material composition 13 is formed in the heat storage body 11 so as to have a planar spread, and the joint portion 14D between the first sheet material 14A and the second sheet material 14B in the bag body 14 is formed. Arranged so as to surround the peripheral edge of the heat storage material composition 13, the joint portion 14D and the frame body 12 (peripheral portion 12A and bridged portions 12B, 12B) are bonded via an adhesive (not shown). At least a portion of the heat storage material composition 13 of the heat storage body 11 is housed in the opening portion 12C of the frame body 12 in a plan view. In this configuration, the first surface 13a of the heat storage material composition 13 having a planar spread can exchange heat with the outside air via the first sheet material 14A of the bag body 14, and the heat storage material composition. Since the second surface 13d of the object 13 can exchange heat with the outside air via the second sheet material 14B of the bag body 14, heat exchange with the outside air of the heat storage material composition 13 is efficient. Can be done

In the present embodiment, at least the portion of the heat storage material composition 13 is housed in the heat storage body 11 so as to be located in the opening portion 12C of the frame body 12 in a plan view, and at least the portion of the heat storage material composition 13 is accommodated. A part of the frame body 12 is configured to protrude from the opening portion 12C in the thickness direction of the frame body 12. With this configuration, heat can be efficiently exchanged with the air flowing in the direction along the surface of the heat storage panel 10. As shown in FIG. 2, a part of the heat storage material composition 13 may protrude from the opening portion 12C of the frame body 12 to only one side (lower side in FIG. 2) of the frame body 12, or may be shown. Although not, a part of the heat storage material composition 13 may protrude from the opening portion 12C of the frame body 12 to both sides (upper side and lower side in FIG. 2) of the frame body 12.

The number of heat storage bodies 11 supported by one frame body 12 may be one, or may be a plurality as shown in the figure. When a plurality of heat storage bodies 11 are supported by one frame body 12, the phase change temperature of the latent heat storage material contained in each heat storage body 11 may be the same or different. Of the plurality of heat storage bodies 11 supported by one frame body 12, the phase change temperature of the latent heat storage material contained in at least one heat storage body 11 is the phase change temperature of the latent heat storage material contained in the other heat storage body 11. In the aspect of the heat storage panel 10 different from the above, the heat storage and heat dissipation performance can be achieved in a wide temperature range. Further, as the individual heat storage body 11, a heat storage body 11 including a latent heat storage material having one phase change temperature can be used, and a plurality of latent heat storage bodies having different phase change temperatures as described in Patent Document 5 can be used. There is no need to use a special heat storage body that combines materials. As a plurality of latent heat storage materials having different phase change temperatures, as described above, it is suitable for solidifying and storing cold temperature in summer, or melting and absorbing the heat when the room temperature is high. Latent heat storage material with phase change temperature and latent heat storage material with phase change temperature suitable for melting and storing warm temperature in winter, or solidifying and dissipating heat when the temperature drops. The combination with the material can be exemplified.

In the present invention, the phase change temperature of the latent heat storage body in one heat storage body 11 is "different" from the phase change temperature of the latent heat storage body in another heat storage body 11 in a temperature range in which the phase change temperature has a certain range. In some cases, it includes both the case where the temperature ranges do not overlap at all and the case where the temperature ranges partially overlap but at least one of the upper limit value and the lower limit value is different.

1.2. Legs The legs 20 engage with one or more portions of the frame 12 of the heat storage panel 10 to maintain their posture to form the heat storage unit 1.

The number of heat storage panels 10 held by the legs 20 is not limited to 3 shown in the figure, and may be 1 or more, but if it is 2 or more, the heat storage capacity of the entire heat storage unit 1 increases and the heat storage and heat dissipation performance is improved. It is preferable because it improves.

Since the heat storage unit 1 is provided with the legs 20, it can be installed directly at the installation location and does not require a further installation stand.

In the first embodiment, the leg portion 20 is a portion of the peripheral edge portion 12A of the frame body 12 that corresponds to the center of each of the four sides of the rectangular contour in the plan view of the heat storage panel 10 (side center portion 12A1). A central leg portion 21 that engages with the center leg portion 21 and a corner leg portion 22 that engages with a portion (corner portion 12A2) corresponding to each of the four corners of the contour are provided.

The legs 20 may be any as long as they can hold the posture of one or more heat storage panels 10, and the number of members constituting the legs 20 and the engagement positions on the frame 12 are as described above in the first embodiment. The example is not limited to.

In the first embodiment, the central leg 21 and the corner leg 22 constituting the leg 20 are plate bodies, and each of them is oriented in a direction (vertical direction) intersecting the direction of the surface of the heat storage panel 10. , Engage with the frame 12 of the heat storage panel 10.

The central leg portion 21 and the side central portion 12A1 of the peripheral edge portion 12A of the frame body 12 are formed so as to be engaged with each other. Specifically, the frame body notch 121 is formed in the side central portion 12A1 of the peripheral edge portion 12A of the frame body 12 from the peripheral edge to the inward in the plan view of the heat storage panel 10, respectively. The width of the frame body notch 121 is configured to be the same as or slightly larger than the thickness of the central leg portion 21 which is a plate body. On the other hand, the central leg portion 21, which is a plate body, has a central leg portion notch 211 formed inward from the peripheral edge at the side end portion 210 thereof. The width of the central leg notch 211 is configured to be the same as or slightly larger than the thickness of the side central portion 12A1 of the peripheral edge portion 12A of the frame body 12. The side central portion 12A1 and the central leg portion 21 of the peripheral edge portion 12A of the frame body 12 can be fitted to each other via the frame body notch 121 and the central leg portion notch 211. In the illustrated example, the frame body notch 121 is formed in all of the four side central portions 12A1 of the peripheral portion 12A of the frame body 12, and the central leg portion 21 is engaged with each of them, but the frame is not limited to this. The central leg portion 21 may be configured to engage only with a part of the four side central portions 12A1 of the peripheral edge portion 12A of the body 12, for example, a pair facing each other. Each of the central leg portions 21 is formed with a number of central leg portion notches 211 corresponding to the number of heat storage panels 10 to be held (3 in the illustrated example).

Similarly, the corner leg portion 22 and the corner portion 12A2 of the peripheral edge portion 12A of the frame body 12 are formed so as to be engaged with each other. Specifically, the corner portions 12A2 of the peripheral edge portion 12A of the frame body 12 are formed with protrusions 122 protruding outward in the plan view of the heat storage panel 10, respectively. On the other hand, the corner leg portion 22, which is a plate body, is formed with a through hole 221 penetrating in the thickness direction of the plate body. The protrusion 122 of the frame body 12 and the through hole 221 of the corner leg portion 22 are formed so that the former is inserted through the latter. Further, by making the length of the protrusion 122 in the protruding direction sufficiently larger than the thickness of the portion surrounding the through hole 221 of the corner leg portion 22 in the penetrating direction, it is possible to prevent the corner leg portion 22 from coming off from the frame body 12. It is preferable because it can be used. In the illustrated example, protrusions 122 are formed on all four corner portions 12A2 of the peripheral edge portion 12A of the frame body 12, and the corner leg portions 22 are engaged with each other, but the frame body 12 is not limited to this. The corner legs 22 may be configured to engage only a part of the four corner portions 12A2 of the peripheral edge portion 12A, for example, a pair facing each other. Each of the corner leg portions 22 is formed with as many through holes 221 as the number of heat storage panels 10 to be held (3 in the illustrated example).

In the illustrated example, the four central legs 21 and the four corner legs 22 engage with the frame 12 of one or more heat storage panels 10 to maintain their posture. As another modification, there is a configuration in which the four corner leg portions 22 are not provided with the four central leg portions 21 and are engaged with the frame body 12 of one or more heat storage panels 10 to maintain the posture. There is a possibility that the heat storage panel 10 hangs downward due to its own weight in the vicinity of the side central portion 12A1 of the peripheral edge portion 12A of the frame body 12. Similarly, as another modification, there is a configuration in which the four central leg portions 21 are not provided with the four corner leg portions 22 and the four central leg portions 21 engage with one or more heat storage panels 10 to maintain the posture. In addition, the heat storage panel 10 may hang downward due to its own weight in the vicinity of the corner portion 12A2 of the peripheral edge portion 12A of the frame body 12.

1.3. Overall Configuration of Heat Storage Unit The heat storage unit 1 according to the first embodiment engages with one or more heat storage panels 10 having the above characteristics and one or more heat storage panel 10 frame bodies 12 and one or more. A leg portion 20 for holding the heat storage panel 10 is provided. The heat storage unit 1 according to the first embodiment can be directly installed on the floor base surface or the like via the legs 20, and can be easily removed after installation.

The heat storage unit 1 according to the first embodiment is an embodiment in which the heat storage panel 10 is held by the legs 20 so that the heat storage panel 10 is substantially horizontal when installed on a horizontal plane. The orientation of the heat storage panel 10 when the heat storage unit 1 is installed on the horizontal plane is not limited to this embodiment, and the heat storage panel 10 may be oriented in a direction intersecting the horizontal direction. The heat storage panel 10 may be held by the leg portion 20 so that the heat storage panel 10 is substantially perpendicular to the horizontal direction as in the third embodiment and the third embodiment.

The number of heat storage panels 10 is not limited to 3 as long as it is 1 or more, but it is preferable if there are a plurality of heat storage panels 10 because the heat storage capacity of one heat storage unit 1 can be increased and the heat storage and heat dissipation performance can be improved.

When the heat storage unit 1 includes a plurality of heat storage panels 10, the phase change temperature of the latent heat storage material contained in the heat storage body 11 included in each heat storage panel 10 may be the same or different. In particular, in an embodiment in which the phase change temperature of the latent heat storage material in the heat storage body 11 included in at least one heat storage panel 10 is different from the phase change temperature of the latent heat storage material in the heat storage body 11 included in the other heat storage panel 10. The heat storage unit 1 can exhibit heat storage and heat dissipation performance in a wide temperature range. For example, a heat storage unit 1 including a plurality of heat storage panels 10 including heat storage bodies 11 including latent heat storage materials having different phase change temperatures can store heat at different temperatures. To give a specific example, a heat storage panel 10 including a heat storage body 11 including a latent heat storage material having a phase change temperature of 22 ° C. and a heat storage panel 10 including a heat storage body 11 including a latent heat storage material having a phase change temperature of 24 ° C. In the heat storage unit 1, the heat storage body 11 including the latent heat storage material having a phase change temperature of 22 ° C. stores heat at 22 ° C. under the condition of 22 ° C., and the latent heat storage material having a phase change temperature of 24 ° C. is stored under the condition of 24 ° C. The heat storage body 11 containing the heat storage body 11 can store heat at 24 ° C. Further, as the individual heat storage body 11, a heat storage body 11 including a latent heat storage material having one phase change temperature can be used, and a plurality of latent heat storage bodies having different phase change temperatures as described in Patent Document 5 can be used. There is no need to use a special heat storage body that combines materials. As a plurality of latent heat storage materials having different phase change temperatures, as described above, a latent heat storage material having a phase change temperature suitable for storing cold temperature in summer and a phase suitable for storing warm temperature in winter An example is a combination with a latent heat storage material having a changing temperature.

When the heat storage unit 1 according to the first embodiment is installed on a horizontal plane, the lower end 20a of the leg portion 20 (center leg portion 21 and corner leg portion 22) (lower end 21a and corner leg of the central leg portion 21) is placed on the horizontal plane. The leg 20 (center leg 21) is in contact with the lower end 22a of the portion 22 so that the horizontal plane and the heat storage panel 10 are separated from each other, that is, the lower end 10a of the heat storage panel 10 is not in contact with the horizontal plane. And the corner leg portion 22) holds the heat storage panel 10. When the heat storage unit 1 having this feature is installed on an installation surface such as a floor base surface, a space is formed between the installation surface and the heat storage panel 10, so that a cord, a cable, or the like is laid in this space. Can be done.

Further, in the heat storage unit 1 according to the first embodiment, when installed on a horizontal plane, the heat storage panel 10 is located between the lower end 10a of the heat storage panel 10 and the horizontal plane along two directions X and Y (see FIG. 4). A space Q that extends and is open to the outside is formed at both ends of the directions X and Y. In this aspect of the heat storage unit 1, air can flow in the space Q along the directions X and Y, and the heat exchange between the heat storage body 11 of the heat storage panel 10 located at the lowermost position and the air is efficiently exchanged. It can be carried out. Further, when the heat storage unit 1 having this feature is installed on an installation surface such as a floor base surface, a space extending along the directions X and Y and having both ends open is formed between the installation surface and the heat storage panel 10. Therefore, cords, cables, etc. can be laid in this space. In the illustrated example, the space Q extends along the two directions X and Y and is open to the outside at both ends of the directions X and Y, but the space Q is not limited to this form. May be a space that extends along at least one direction and is open to the outside at both ends of that direction.

In the heat storage unit 1 according to the first embodiment, a plurality of heat storage panels 10 are held by the legs 20 with the gap S interposed therebetween. The void S is a space that extends along two directions X and Y (see FIG. 4) and is open to the outside at both ends of the directions X and Y. In this aspect of the heat storage unit 1, air can flow in the gaps S formed between the heat storage panels 10 along the directions X and Y, and heat is efficiently exchanged between the heat storage body 11 and the air. be able to. In the illustrated example, the space S extends along the two directions X and Y and is open to the outside at both ends of the directions X and Y, but the space S is not limited to this form. May be a space that extends along at least one direction and is open to the outside at both ends of that direction.

<2. First Embodiment of floor structure>
A specific first embodiment of the floor structure of the present invention will be described below with reference to FIGS. 6 and 7.

The floor structure 2 according to the present embodiment is
A floor structure 62 arranged above the floor base surface 61 with an underfloor space P separated from the floor structure 62.
It is provided with the above-mentioned heat storage unit 1 according to the present invention, which is installed on the floor base surface 61.

This embodiment is an embodiment in which the heat storage unit 1 according to the first embodiment is used as the heat storage unit, but other heat storage units (for example, the second embodiment described later or the second embodiment described later) are within the scope of the present invention. The heat storage unit 1) according to the third embodiment may be used.

Examples of the floor structure 2 include a double floor structure such as an OA floor, and a floor structure on the first floor of a house by a conventional construction method using a floor bundle or a large pull. Examples of the floor base surface 61 include the surface of a concrete slab, the surface of a concrete foundation under the floor of the first floor of a house, and the like.

In the floor structure 2 according to the present embodiment, the floor structure 62 is formed by laying a plurality of floor panels 621. The floor panel 621 can be composed of a steel panel, an aluminum panel, a caucal panel, a plywood, a particle board, an OSB or the like. Although not shown, a floor finishing material such as a carpet may be further laid on the side of the indoor space 63 of the floor structure 62 on which the floor panel 621 is laid.

A support leg 64 for supporting the floor structure 62 is arranged between the floor structure 62 and the floor base surface 61. The support legs 64 are configured so that the height of the underfloor space P can be finely adjusted. The support legs 64 are connected to the floor receiving portion 641 that receives the floor panel 621, the rod-shaped supporting portion 642 to which the floor receiving portion 641 is connected to the upper end, and the lower end of the supporting portion 642, and the supporting portion 642 is connected to the floor base surface 61. It is provided with a base portion 643 to be fixed.

The height of the heat storage unit 1 to be installed may be set so as to be smaller than the height of the underfloor space P from the floor base surface 61 to the floor structure 62. For example, in a double floor structure such as an OA floor, the height of the underfloor space P is generally 50 to 300 mm, and the height of the heat storage unit 1 is set so as to be equal to or less than the height of the underfloor space P. can do.

In the floor structure 2 according to the present embodiment, since the heat storage unit 1 is installed in the underfloor space P, hot or cold heat can be stored in the underfloor space P. Since the heat storage unit 1 can independently maintain the posture of the heat storage body 11, the floor structure 2 can be constructed by installing the heat storage unit 1 on the floor base surface P, and the mechanism is simple and the cost can be reduced. It's easy.

Further, as the heat storage unit 1, a structure in which the heat storage panel 10 is held by the legs 20 so that the heat storage panel 10 and the horizontal plane are separated from each other when installed on a horizontal plane is used as in the first embodiment. As shown in FIG. 6, the heat storage unit 1 can be installed from above the wiring 65 such as a cord and a cable is arranged on the floor base surface 61, which is particularly preferable.

According to the floor structure 2 of the present embodiment, the cold or warm heat of the air on the side of the indoor space 63 is stored in the heat storage body 11 of the heat storage unit 1, and the cold or warm heat stored in the heat storage body 11 is stored in the indoor space again. It can be supplied to the air on the side of the space 63. At this time, the air on the side of the indoor space 63 and the heat storage body 11 can transfer heat through the floor structure 62 and the underfloor space P.

In order to transfer heat more efficiently, as shown in FIG. 6, an introduction path 66 that ventilates between the indoor space 63 and the underfloor space P and introduces the air of the indoor space 63 into the underfloor space P. It is preferable to form a lead-out path 67 that ventilates between the indoor space 63 and the underfloor space P and leads the air in the underfloor space P to the indoor space 63. In FIG. 6, both the introduction path 66 and the lead-out path 67 are formed in a part of the floor structure 62, but the present invention is not limited to this form, and for example, a wall portion (not shown) surrounding the indoor space 63 and the like. It may be formed on the ceiling (not shown). The air flow path of the introduction path 66 and the lead path 67 can be formed by an appropriate duct. Means for moving air (for example, a blower fan, an air conditioner) may be arranged in at least one of the introduction path 66 and the lead path 67.

In FIG. 6, the air flow is indicated by an arrow. The floor structure 2 provided with the introduction path 66 and the lead-out path 67 can be used as follows, for example. When the heat storage material composition 13 of the heat storage body 11 of the heat storage unit 1 contains a latent heat storage material having a phase change temperature higher than the temperature of the air cooled by cooling and lower than the outside temperature, the electricity charge at midnight or the like. A heat storage unit installed in the underfloor space P by circulating air between the indoor space 63 and the underfloor space P while operating a cooling device (not shown) to cool the indoor space 63 during a cheap time zone. The latent heat storage material contained in the heat storage material composition 13 of the heat storage body 11 of 1 is solidified to store cold air. Then, in a time zone such as daytime when the electricity charge is high, the air in the indoor space 63 is introduced into the underfloor space P by the introduction path 66, passed through the heat storage unit 1, and led out to the indoor space 63 by the lead-out path 67. .. In this process, the air introduced from the indoor space 63 into the underfloor space P is cooled by the heat of fusion when the latent heat storage material contained in the heat storage material composition 13 of the heat storage body 11 of the heat storage unit 1 is melted, and is cooled by the heat of fusion when the latent heat storage material is melted. Derived to.

In the floor structure 2 including the introduction path 66 and the lead-out path 67, an air flow is generated in the underfloor space P. In this case, the heat storage unit 1 according to the first embodiment is installed on the floor base surface 61 so that any of the directions X and Y shown in FIG. 4 substantially coincides with the direction of the air flow in the underfloor space P. It is possible to improve the efficiency of heat exchange between the heat storage body 11 of the heat storage panel 10 of the heat storage unit 1 and the flowing air.

In the floor structure 2 according to the present embodiment, as shown in FIG. 7, at least one of the plurality of floor panels 621 constituting the floor structure 62 is removable, and one of the removable floor panels 621 is used. A further feature is that the dimension of the heat storage unit 1 in the plan view is smaller than the dimension in the plan view of the opening 70 of the underfloor space P formed when the floor space P is removed. Here, "the dimension of the heat storage unit 1 in the plan view is smaller than the dimension of the opening 70 of the underfloor space P in the plan view" means that the contour L of the opening 70 of the underfloor space P in the plan view is the heat storage. It means that the contour M in the plan view of the unit 1 is completely included. In this case, the heat storage unit 1 can be easily attached to and detached from the floor base surface 61 from the side of the indoor space 63 through the opening 70. Therefore, for example, even when the wiring 65 is installed on the floor base surface 61 and the heat storage unit 1 is arranged on the wiring 65, it is easy to maintain the wiring 65.

<3. Heat storage unit according to the second embodiment>
A second embodiment of the heat storage unit of the present invention will be described with reference to FIG. In the following description, in the heat storage unit according to the second embodiment, the components having the same characteristics as the heat storage unit according to the first embodiment are designated by the same numbers, and the description thereof will be omitted.

The heat storage unit 1 according to the second embodiment is a portion of a heat storage panel 10 including four heat storage bodies 11 and a frame body 12 supporting the four heat storage bodies 11, and each frame body 12 of the three heat storage panels 10. A leg portion 20 that engages with and holds the posture of the three heat storage panels 10 is provided.

Similar to the heat storage unit 1 according to the first embodiment, the heat storage unit 1 according to the second embodiment can be directly installed on the floor base surface or the like via the legs 20, and can be easily removed after installation. be.

The heat storage unit 1 according to the second embodiment is characterized in that the heat storage panel 10 is held by the legs 20 so that the heat storage panel 10 is substantially perpendicular to the horizontal direction when installed on a horizontal plane. And.

The heat storage unit 1 according to the second embodiment includes two vertical holding legs 23 as the legs 20. The vertical holding legs 23 are each two portions (holding portion 12A3) of the peripheral portion 12A of the frame body 12 of the heat storage panel 10 located on one side of the rectangular contour of the heat storage panel 10 in a plan view. ) Engage.

In the second embodiment, each of the vertical holding legs 23 is a plate body, is oriented in a direction intersecting the direction of the surface of the heat storage panel 10 (vertical direction), and is engaged with the frame body 12 of the heat storage panel 10. NS.

The vertical holding leg 23 and the holding portion 12A3 of the peripheral edge 12A of the frame body 12 are formed so as to be engaged with each other. Although a specific configuration is not shown, the vertical holding leg portion 23 can have a structure in which a notch is formed similar to the central leg portion 21 in the first embodiment, and holds the peripheral edge portion 12A of the frame body 12. The portion 12A3 may have a structure in which a notch is formed in the same manner as the side central portion 12A1 of the peripheral edge portion 12A of the frame body 12 in the first embodiment. Then, the vertical holding leg 23 and the holding portion 12A3 of the peripheral edge 12A of the frame body 12 can be fitted to each other through the notch. Similar to the central leg 21 in the first embodiment, the vertical holding leg 23 can be formed with a number of notches corresponding to the number of heat storage panels 10 to be held (3 in the illustrated example).

When the heat storage unit 1 according to the second embodiment is installed on a horizontal plane, the lower end 20a of the leg portion 20 (vertical holding leg portion 23) (lower end 23a of the vertical holding leg portion 23) comes into contact with the horizontal plane. The heat storage panel 10 is held by the leg portion 20 (vertical holding leg portion 23) so that the horizontal plane and the heat storage panel 10 are separated from each other, that is, the lower end 10a of the heat storage panel 10 does not come into contact with the horizontal plane. Has been done. When the heat storage unit 1 having this feature is installed on an installation surface such as a floor base surface, a space is formed between the installation surface and the heat storage panel 10, so that a cord, a cable, or the like is laid in this space. Can be done.

Further, in the heat storage unit 1 according to the second embodiment, when installed on a horizontal plane, the heat storage unit 1 _{extends along one direction X 1} (see FIG. 8) between the lower end 10a of the heat storage panel 10 and the horizontal plane. and, the space Q which is open outward at both ends of the direction X ₁ is formed. In this embodiment of the heat-storage unit 1, the space Q, along the direction X ₁ can flow air, it can exchange heat with the air and the heat storage medium 11 of the heat storage panel 10 efficiently. Further, the heat storage unit 1 having this feature, when installed in an installation surface of the floor ground such as the space at both ends extending along the direction X ₁ is open between the heat storage panel 10 with the installation surface is formed Therefore, cords, cables, etc. can be laid in this space.

In the heat storage unit 1 according to the second embodiment, a plurality of heat storage panels 10 are held by the legs 20 with the gap S interposed therebetween. The void S is a space _{that extends along two directions Y 1} and Z ₁ (see FIG. 8) and is open to the outside at both ends of _{the directions Y 1} and Z _{1, respectively.} In this embodiment of the heat-storage unit 1, the gap S formed between the heat storage panel 10, along the direction Y _1, Z ₁ can flow air, efficient exchange of heat between the air and the regenerator 11 Can be done. In the illustrated example, the space S extends along the _{two directions Y 1} , Z ₁ and is open to the outside at both ends of _{the directions Y 1} , Z _{1, but is limited to this form.} Instead, the void S may be a space that extends along at least one direction and is open to the outside at both ends in that direction.

In the heat storage unit 1 according to the second embodiment and the second embodiment described later, the gap S between the adjacent heat storage panels 10 _{extends in the vertical direction Z 1} and the horizontal direction Y ₁ , and in the horizontal direction Y ₁ . By being open to the outside at both ends, the following advantageous effects are achieved.

The air flow flowing through the underfloor space of the floor structure, particularly the air flow supplied to the underfloor space by the air conditioner, tends to be an air flow that spreads in the horizontal direction and has a small thickness in the vertical direction. Like the heat storage unit 1 according to the first embodiment described with reference to FIGS. 1 to 5, each of the plurality of voids S formed between the adjacent heat storage panels 10 extends along the _{horizontal directions X 1} and Y _1. When an air flow that spreads horizontally and has a small thickness in the vertical direction passes through the heat storage unit, the air flow passes through only a part of the plurality of voids S having different vertical positions, and the air flow passes through. Only the heat storage panel 10 sandwiching the partial gap S tends to exchange heat with the air flow to reduce the efficiency of heat storage. On the other hand, as in the heat storage unit 1 according to the second embodiment and the third embodiment described later, the individual heat storage panels 10 are arranged substantially vertically when installed on a horizontal plane, and each of the voids S is formed. extending in a direction perpendicular Z ₁ and the horizontal direction Y _1, and, with respect to the heat storage unit 1 of the open structure outward at both ends of the horizontal direction Y _1, along a horizontal direction Y _1, in the horizontal direction When an air flow having a small thickness in the spreading vertical direction passes through, the air flow can pass through all the voids S, so that all the heat storage panels 10 can exchange heat with the air flow, and heat storage and heat dissipation are efficient. Can be done.

<4. Heat storage unit according to the third embodiment>
A third embodiment of the heat storage unit of the present invention will be described with reference to FIG. In the following description, in the heat storage unit according to the third embodiment, the components having the same characteristics as the heat storage unit according to the first embodiment are designated by the same numbers, and the description thereof will be omitted.

The heat storage unit 1 according to the third embodiment includes a heat storage panel 10 including two heat storage bodies 11 and a frame body 12 that supports the two heat storage bodies 11, and a portion of each frame body 12 of the six heat storage panels 10. A leg portion 20 that engages with and holds the posture of the six heat storage panels 10.

Similar to the heat storage unit 1 according to the first embodiment and the second embodiment, the heat storage unit 1 according to the third embodiment can be directly installed on the floor base surface or the like via the legs 20, and after installation. Easy to remove.

The heat storage unit 1 according to the third embodiment includes a plate-shaped leg portion 24 as the leg portion 20. On the side of the upper surface 24a of the plate-shaped leg portion 24, a number of concave grooves 24b corresponding to the heat storage panel 10 are formed. Of the peripheral edge portion 12A of the frame body 12 of the heat storage panel 10, the portion 12A4 on one side of the rectangular contour of the heat storage panel 10 in a plan view engages with one of the concave grooves 24b of the plate-shaped leg portion 24. By doing so, the plurality of heat storage panels 10 are held by the plate-shaped legs 24 with the gap S in between.

In the heat storage unit 1 according to the third embodiment, in the heat storage panel group 10A composed of three of the six heat storage panels 10, the surface on the side where the heat storage body 11 is exposed from the opening portion 12C of the frame body 12 faces in the same direction. The heat storage panel group 10B composed of the remaining three is also arranged adjacent to each other so that the surfaces face the same direction, and the three heat storage panels 10 of the heat storage panel group 10A and the heat storage panel are arranged adjacent to each other. The three heat storage panels 10 of the group 10B are held by the plate-shaped legs 24 so that the surfaces face each other.

When the heat storage unit 1 according to the third embodiment is installed on a horizontal plane, the six heat storage panels 10 are _{substantially perpendicular to the horizontal directions X 1} and Y ₁ , and the gaps between the six heat storage panels 10 are provided. S is extends along the horizontal direction Y _1, so that is open to the outside at both ends of the horizontal direction Y ₁ space, six heat storage panel 10 is held in the plate-like leg 24 .. In the heat storage unit 1 according to the third embodiment, when the heat storage unit 1 is installed on a horizontal plane, the six heat storage panels 10 are _{oriented substantially perpendicular to the horizontal directions X 1} and Y ₁ , so that each void S is inevitably formed. not only extends along the horizontal direction Y _1, extends along the vertical direction Z _1. That is, similar to the details of the heat storage unit 1 according to the second embodiment, the heat storage units 1 according to the third embodiment also have individual heat storage panels 10 arranged substantially vertically when installed on a horizontal plane. Each of the voids S _{has a structure extending in the vertical direction Z 1} and the horizontal direction Y ₁ and being open to the outside at both ends of the horizontal direction Y _1. Therefore, with respect to the heat storage unit 1 according to the third embodiment, along the horizontal direction Y _1, when the vertical direction of the thickness is less air flow spread in the horizontal direction to pass through, the air flow to all of the void S Since all the heat storage panels 10 can exchange heat with the air flow, heat storage and heat dissipation can be performed efficiently.

The heat storage unit 1 according to the third embodiment shown in the figure further includes two reinforcing members 90. Each of the two auxiliary members 90 is a rod-shaped member in which a number of concave grooves 90b corresponding to the heat storage panel 10 is formed. Of the peripheral edge portion 12A of the frame body 12 of the heat storage panel 10, both end portions of the portion 12A5 on the other side facing the portion 12A4 on the side are engaged with one of the concave grooves 90b of each reinforcing member 90, respectively. By doing so, the posture of the heat storage panel 10 is maintained. However, the reinforcing member 90 is not an indispensable configuration, and the posture of the heat storage panel 10 may be maintained only by the plate-shaped legs 24.

<5. Second embodiment of floor structure>
A specific second embodiment of the floor structure of the present invention will be described below with reference to FIG. In the following description, in the floor structure according to the second embodiment, the components having the same features as the floor structure according to the first embodiment are designated by the same numbers, and the description thereof will be omitted.

The second embodiment of the floor structure 2 is
A floor structure 62 arranged above the floor base surface 61 with an underfloor space P separated from the floor structure 62.
It is provided with the above-mentioned heat storage unit 1 according to the present invention, which is installed on the floor base surface 61.

FIG. 10 shows an example in which the heat storage unit 1 according to the third embodiment is used as the heat storage unit 1.

In the floor structure 2 according to the present embodiment, the floor structure 62 is placed on the joist 625, the joist 625 arranged so as to be orthogonal to the joist 625, and the underfloor laid on the joist 624. It is composed of plywood 623. Although not shown, a floor finishing material such as a carpet may be further laid on the side of the interior space 63 of the floor structure 62.

Although omitted in FIG. 10, a floor bundle that supports the floor structure 62 is arranged between the floor structure 62 and the floor base surface 61. As a specific example of the floor bundle, the support legs 64 described in the first embodiment of the floor structure can be exemplified.

The height of the heat storage unit 1 to be installed may be set so as to be smaller than the height of the underfloor space P from the floor base surface 61 to the floor structure 62. Generally, the height of the underfloor space P is 50 to 300 mm, and the height of the heat storage unit 1 can be set so as to be equal to or less than the height of the underfloor space P.

The floor structure 2 according to the third embodiment is further characterized by including an air flow supply device 100 that supplies an air flow F to the underfloor space P. Here, the airflow supply device 100 may be any as long as it can supply the air flow F to the underfloor space P, and examples thereof include a fan, a blower such as a blower fan, and an air conditioner. In FIG. 10, a floor opening 69 connecting the indoor space 63 and the underfloor space P is formed in a part of the floor structure 62. The airflow supply device 100 is installed in the floor opening 69 and supplies the airflow F to the underfloor space P. When the air conditioner 100 is an air conditioner, for example, when the electricity charge is low or when the temperature difference between indoors and outdoors is small and the load is small, the air conditioner supplies cold air or warm air to the underfloor space P as an air flow F. Then, cold air or warm air can be stored as latent heat in the heat storage unit 1. When the airflow supply device 100 is a blower, cold air at night and in the morning is supplied from the indoor space 63 to the underfloor space P and stored in the heat storage unit 1 in the middle period such as spring and autumn, and is stored under the floor when the temperature is high in the daytime. It is possible to use the cold air stored in the space.

In the floor structure 2 according to the second embodiment, each of the heat storage panels 10 is substantially perpendicular to the floor base surface 61, and each of the voids S extends along the horizontal direction and the air supplied by the airflow supply device 100. The heat storage unit 1 according to the third embodiment is installed on the floor base surface 61 so as to follow the flow direction of the flow F. Therefore, the air flow F flowing through the underfloor space P can pass through all the voids S of the heat storage unit 1 according to the third embodiment, so that the heat storage bodies 11 of all the heat storage panels 10 included in the heat storage unit 1 can pass through. The air flow F and heat can be exchanged efficiently.

In a preferred embodiment of the floor structure 2 of the present embodiment, the heat storage material composition 13 included in the heat storage body 11 included in the heat storage unit 1 is a heat storage material of the air flow F supplied from the air flow supply device 100 as a latent heat storage material. It contains a latent heat storage material having a phase change temperature which is 2 ° C. or more lower, more preferably 3 ° C. or more lower than the temperature at the place where the unit 1 is installed. In the floor structure 2 of this aspect, when the latent heat storage material is melted by the air flow F supplied from the airflow supply device 100 from the solidified state and then resolidified, the amount of heat radiated is large, that is, the heat of warm air is generated. Heat can be stored efficiently. Therefore, in winter, when the load of the air conditioner (indoor / outdoor temperature difference) is small (daytime, etc.), the heating by the air conditioner (air flow supply device 100) is operated to supply warm air to the heat storage unit 1 to supply the heat storage body. Warm air is stored by melting the latent heat storage material of 11, the heating by the air conditioner is stopped during a time when the load is heavy (early morning, etc.), and the latent heat storage material of the heat storage unit 11 of the heat storage unit 1 of the underfloor space P is re-used. By solidifying, the stored warm air can be used. In the floor structure 2 of this embodiment, when a plurality of heat storage units 1 are installed on the floor base surface 61, if the temperature of the air flow F supplied from the airflow supply device 100 differs depending on the installation location, the air at the installation location A heat storage unit 1 containing a latent heat storage material having a phase change temperature different depending on the temperature of the flow F may be installed.

In another preferred embodiment of the floor structure 2 of the present embodiment, the heat storage material composition 13 contained in the heat storage body 11 included in the heat storage unit 1 is the latent heat storage material of the air flow F supplied from the air flow supply device 100. Includes a latent heat storage material having a phase change temperature that is 2 ° C. or higher, more preferably 3 ° C. or higher, relative to the temperature at the location where the heat storage unit 1 is installed. In the floor structure 2 of this aspect, when the latent heat storage material is solidified by the air flow F supplied from the airflow supply device 100 from the melted state and then remelted, the amount of heat absorbed is large, that is, cold air is efficiently produced. Can be stored in. Therefore, in the middle period such as spring and autumn, cold air at night and in the morning is supplied to the heat storage unit 1 by the airflow supply device 100 to solidify the latent heat storage material of the heat storage body 11 to store the cold air at high temperature in the daytime. The cold air stored by remelting the latent heat storage material of the heat storage body 11 of the heat storage unit 1 in the underfloor space P can be used. In the floor structure 2 of this embodiment, when a plurality of heat storage units 1 are installed on the floor base surface 61, if the temperature of the air flow F supplied from the airflow supply device 100 differs depending on the installation location, the air at the installation location A heat storage unit 1 containing a latent heat storage material having a phase change temperature different depending on the temperature of the flow F may be installed.

<6. How to store warm / cold air>
The present invention is also a method of storing warm air using the heat storage unit 1 of the first to third embodiments described above.
The heat storage unit 1 is brought into contact with air having a temperature higher than the phase change temperature of the latent heat storage material contained in the heat storage composition 13 in the heat storage body 11 included in the heat storage unit 1 by 2 ° C. or higher, preferably 3 ° C. or higher. Provide a method to include.

The experimental results of Example 2 below show that the heat storage unit is in air at a temperature that is 2 ° C. or higher, preferably 3 ° C. or higher, higher than the phase change temperature of the latent heat storage material contained in the heat storage composition 13 in the heat storage body 11. When 1 is brought into contact with the latent heat storage material to melt the latent heat storage material from the solidified state, the amount of heat released when the latent heat storage material is resolidified is large, that is, warm air is efficiently stored.

The present invention is also a method of storing cold air using the heat storage unit 1 of the first to third embodiments described above.

The heat storage unit 1 is brought into contact with air having a temperature lower than the phase change temperature of the latent heat storage material contained in the heat storage composition 13 in the heat storage body 11 included in the heat storage unit 1 by 2 ° C. or higher, preferably 3 ° C. or higher. Provide a method to include.

From the experimental results of Example 2 below, the heat storage unit is in air at a temperature that is 2 ° C. or higher, preferably 3 ° C. or higher, lower than the phase change temperature of the latent heat storage material contained in the heat storage composition 13 in the heat storage body 11. When the latent heat storage material is solidified from the molten state by contacting No. 1, it is presumed that the amount of heat absorbed when the latent heat storage material is remelted is large, that is, cold air is efficiently stored.

[Example 1]
The heat storage unit 1 according to the first embodiment shown in FIGS. 1 to 5 was manufactured.

As the frame body 12 of the heat storage panel 10, the outer dimensions in a plan view are 2.7 mm in thickness, 420 mm in width, and 420 mm in depth, and as the opening portion 12C, a square opening portion having a side of about 200 mm penetrating in the thickness direction. A medium density fiberboard (MDF) in which four of the above were formed was used. As shown in FIG. 1, the frame body notch 121 was formed in the side central portion 12A1 of the peripheral edge portion 12A of the frame body 12 from the peripheral edge to the inward in the plan view of the heat storage panel 10, respectively. Further, as shown in FIG. 1, each of the four corner portions 12A2 of the peripheral portion 12A of the frame body 12 is formed with protrusions 122 protruding outward in the plan view of the heat storage panel 10.

As the heat storage material composition 13, a wood base material impregnated with a composition obtained by gelling paraffin as a latent heat storage material with a hydrogenated styrene-based thermoplastic elastomer was used. The dimensions of the wood base material were 9 mm in thickness, 200 mm in width, and 200 mm in depth. The phase change temperature (latent heat absorption / release temperature) of the paraffin contained in the heat storage material composition 13 was 15 to 40 ° C.

The bag body 14 was formed by using a polyethylene terephthalate (PET) resin sheet as the first sheet material 14A and an aluminum laminate film as the second sheet material 14B. The PET sheet is a three-layered sheet in which an ethylene-vinyl acetate copolymer (EVA) resin, a PET resin, and an EVA resin are laminated in this order. The aluminum laminated film is a sheet having a three-layer structure in which aluminum, PET resin, and EVA resin are laminated in this order. The first sheet material 14A and the second sheet material 14B were fused with each other of EVA resin layers by heat fusion to form a joint portion 14D.

Using the above materials, three heat storage panels 10 having the structures shown in FIGS. 1 and 2 were produced.

As the leg portion 20, four central leg portions 21 and four corner leg portions 22 were used. As the central leg portion 21, a medium density fiberboard (MDF) having a thickness of 9 mm, a width of 80 mm, and a height of 180 mm, in which three central leg portion notches 211 were formed, was used. As the corner leg portions 22, three through holes 221 were formed in medium density fiberboard (MDF) having a thickness of 2.7 mm, a width of 50 mm, and a height of 180 mm, respectively.

The heat storage unit 1 having the structure shown in FIG. 4 was created by the heat storage panel 10 and the legs 20.

[Example 2]
The heat storage unit 1 according to the third embodiment shown in FIG. 9 was manufactured.
As the frame body 12 of the heat storage panel 10, the outer dimensions in a plan view are 2.7 mm in thickness, 420 mm in width, and 220 mm in depth, and as the opening portion 12C, a square opening portion having a side of about 200 mm penetrating in the thickness direction. A medium density fiberboard (MDF) in which two of the above were formed was used.

As the heat storage material composition 13, a wood substrate impregnated with a composition obtained by gelling paraffin having a phase change temperature of 26 ° C. with a hydrogenated styrene-based thermoplastic elastomer as a latent heat storage material was used. The dimensions of the wood base material were 9 mm in thickness, 200 mm in width, and 200 mm in depth.

The bag body 14 was formed by using a polyethylene terephthalate (PET) resin sheet as the first sheet material 14A and an aluminum laminate film as the second sheet material 14B. The PET sheet is a three-layered sheet in which an ethylene-vinyl acetate copolymer (EVA) resin, a PET resin, and an EVA resin are laminated in this order. The aluminum laminated film is a sheet having a three-layer structure in which aluminum, PET resin, and EVA resin are laminated in this order. The first sheet material 14A and the second sheet material 14B were fused with each other of EVA resin layers by heat fusion to form a joint portion 14D.

Six heat storage panels 10 having the structure shown in FIG. 9 were produced using the above materials.
As the plate-shaped leg portion 24, a plywood having a thickness of 12 mm, a width of 420 mm, and a depth of 420 mm was used. Six concave grooves 24b having a width of 3 mm were formed on one surface (upper surface) 24a of the plate-shaped leg portion 24.

As the auxiliary member 90, two square bar members having six concave grooves 90b formed were prepared.

One long side portion 12A4 of each frame body 12 of the six heat storage panels 10 is fixed to the concave groove 24b of the plate-shaped leg portion 24, and both ends of the other long side portion 12A5 of the frame body 12 are two. The heat storage unit 1 according to the third embodiment was manufactured by fixing to the concave groove 90b of the auxiliary member 90.

Next, the sensors of the heat flow meter were arranged on both sides of the heat storage body 11 (phase change temperature 26 ° C.) of the heat storage unit 1 according to the third embodiment produced above, and the following tests were performed. 26 ° C (phase change temperature), 27 ° C (phase change temperature + 1 ° C), 28 ° C (phase change temperature + 2 ° C) from the air conditioner to the heat storage unit 1 in a state where the latent heat storage material of the heat storage body 11 is solidified at 20 ° C. , 29 ° C (phase change temperature + 3 ° C), 31 ° C (phase change temperature + 5 ° C), or the temperature at which the latent heat storage material completely melts. After that, the heat storage unit 1 was transferred to a constant temperature bath at 20 ° C. and left for about 1 day. The amount of heat released at this time was measured with a calorimeter. When the set temperature of the air conditioner is set to the temperature at which the latent heat storage material is completely melted and the heat radiation amount is 100%, the ratio (%) of the heat radiation amount at each set temperature is defined as the "latent heat storage ratio". The result is as follows.

From this result, it is preferable that the latent heat storage ratio is 50% or more in order to bring the solidified heat storage material composition into contact with air (warm air) having a temperature equal to or higher than the phase change temperature to store heat. , It became clear that it is preferable to bring it into contact with air having a phase change temperature of 2 ° C. or higher. Further, in order to bring the melted heat storage material composition into contact with air (cold air) having a temperature equal to or lower than the phase change temperature, it is preferable to bring it into contact with air having a temperature equal to or lower than the phase change temperature of 2 ° C. Is also suggested.

1: Heat storage unit, 2: Floor structure, 10: Heat storage panel, 11: Heat storage body, 12: Frame body, 13: Heat storage material composition, 14: Bag body, 20: Legs, 21: Central leg, 22: Corner legs, 23: Vertical holding legs, 12C: Frame opening, 61: Floor base surface, 62: Floor structure, 621: Floor panel, P: Underfloor space, 70: Underfloor space opening, S: Gap between a plurality of heat storage panels, X: direction in which the gap S extends, Y: direction in which the gap S extends, Y ₁ : direction in which the gap S extends, Z ₁ : direction in which the gap S extends

Claims (13)

The floor structure arranged above the floor base surface with the underfloor space separated,
With the heat storage unit installed on the floor base surface
It is a floor structure equipped with
The heat storage unit is
A heat storage body including a bag body and a heat storage material composition containing a latent heat storage material contained in the bag body, and
A heat storage panel including a frame body that supports one or more of the heat storage bodies, and
1 or more of said frame portions engage and the heat storage panel, e Bei a leg portion for retaining one or more of the attitude of the heat storage panel,
The floor structure comprises a plurality of laid floor panels.
At least one of the plurality of floor panels is removable
The plan view dimension of the heat storage unit is smaller than the plan view dimension of the opening of the underfloor space formed when one of the removable floor panels is removed.
Floor structure . In the heat storage unit, the frame body supports a plurality of the heat storage bodies.
The phase change temperature of the latent heat storage material in at least one of the plurality of heat storage bodies supported by the frame body is different from the phase change temperature of the latent heat storage material in the other heat storage body. The floor structure according to claim 1. The heat storage unit includes a plurality of the heat storage panels.
The phase change temperature of the latent heat storage material in the heat storage body included in at least one of the heat storage panels is different from the phase change temperature of the latent heat storage material in the heat storage body provided in the other heat storage panel. , The floor structure according to claim 1 or 2. In the heat storage unit
An opening portion penetrating in the thickness direction is formed in the frame body.
The heat storage body is housed in the opening portion so that at least a part of the heat storage material composition protrudes from the frame body in the thickness direction of the frame body from the opening portion. The floor structure according to any one of 3 to 3. The floor structure according to any one of claims 1 to 4, wherein in the heat storage unit, the bag body of the heat storage body contains a metal film. In the thermal storage unit, the said heat storage panel when the heat storage unit was placed on a horizontal plane and the horizontal plane is the heat storage panel to be separated are held by the legs, any one of claims 1 to 5 The floor structure described in. The heat storage unit includes a plurality of the heat storage panels held by the legs with a gap in between.
The floor structure according to any one of claims 1 to 6, wherein each of the voids is a space that extends along at least one direction and is open to the outside at both ends of the direction. When the heat storage unit is installed on a horizontal surface,
Each of the plurality of heat storage panels is substantially perpendicular to the horizontal direction.
A plurality of the heat storage panels are held by the legs in the heat storage unit so that each of the gaps extends along the horizontal direction and becomes a space open to the outside at both ends in the horizontal direction. Item 7. The floor structure according to item 7. In the thermal storage unit,
The heat storage unit is such that each of the heat storage panels is substantially perpendicular to the floor base surface, and each of the voids extends along the horizontal direction to form a space open to the outside at both ends in the direction. The floor structure according to claim 8 , wherein is installed on the floor base surface. Further equipped with an airflow supply device that supplies an air flow to the underfloor space,
The heat storage composition in the heat storage body included in the heat storage unit has a latent heat storage having a phase change temperature of 2 ° C. or more lower than the temperature of the air flow supplied from the airflow supply device at the location where the heat storage unit is installed. The floor structure according to any one of claims 1 to 9, which comprises a material. Further equipped with an airflow supply device that supplies an air flow to the underfloor space,
The heat storage composition in the heat storage body included in the heat storage unit has a latent heat storage having a phase change temperature of 2 ° C. or more higher than the temperature of the air flow supplied from the air flow supply device at the location where the heat storage unit is installed. The floor structure according to any one of claims 1 to 9, which comprises a material. A method for storing warm air using the floor structure according to any one of claims 1 to 11.
A method comprising contacting the heat storage unit with air having a temperature higher than 2 ° C. or more with respect to the phase change temperature of the latent heat storage material contained in the heat storage composition in the heat storage body included in the heat storage unit. A method for storing cold air using the floor structure according to any one of claims 1 to 11.
A method comprising contacting the heat storage unit with air having a temperature lower than the phase change temperature of the latent heat storage material contained in the heat storage composition in the heat storage body provided by the heat storage unit by 2 ° C. or more.

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