WO2013175971A1

WO2013175971A1 - Heat storage member, and heat storage container and construction material using same

Info

Publication number: WO2013175971A1
Application number: PCT/JP2013/063048
Authority: WO
Inventors: 梅中　靖之; 夕香内海; 井出　哲也; 知久宮谷; 山下　隆; 宮田　昭雄; 和広出口
Original assignee: シャープ株式会社
Priority date: 2012-05-23
Filing date: 2013-05-09
Publication date: 2013-11-28

Abstract

The objective of the present invention is to provide a heat storage member with which the heat storage/radiation property can be improved, while suppressing deformation of a container due to changes in the volume of a latent heat storage material, and to provide a heat storage container and a construction material using this heat storage member. The present invention is constructed so as to have: a container (30), equipped with a pair of inner wall surfaces (40a, 51a) opposing one another, and an internal space formed between the pair of inner wall surfaces (40a, 51a); a latent heat storage material (10), which is arranged in the internal space, in contact with the one inner wall surface (40a), and which reversibly changes phase between a solid phase and a liquid phase, producing an expansion or a contraction during the phase changes; and an elastic member (60), which is arranged between the latent heat storage material (10) and the other inner wall surface (51a), and undergoes elastic deformation in response to the expansion or contraction of the latent heat storage material (10).

Description

Heat storage member and heat storage container and building material using the same

The present invention relates to a heat storage member using a latent heat storage material, and a heat storage container and building material using the heat storage member.

Patent Document 1 discloses a heat storage having a flat plate-like latent heat storage material, a buffer material arranged in a frame shape around the latent heat storage material, and an aluminum laminate bag that covers the entire latent heat storage material and the buffer material. A board is disclosed. In this heat storage board, since the expansion in the long side direction of the latent heat storage material is absorbed by the buffer material, the entire heat storage board does not expand in the long side direction.

JP-A-5-1283 Japanese Patent Laid-Open No. 10-60287

However, since the above cushioning material is not provided on the front surface or the back surface of the heat storage board, it cannot absorb the expansion of the latent heat storage material in the thickness direction. For this reason, as the latent heat storage material expands in the plate thickness direction, the aluminum laminate bag (container) that is easily bent is easily deformed. When expansion and contraction of the latent heat storage material and accompanying bag deformation occur repeatedly, a gap is likely to be formed between the latent heat storage material and the container on the front and back surfaces of the heat storage board. Generally, heat storage from the outside to the latent heat storage material and heat radiation from the latent heat storage material to the outside are performed mainly via the front or back surface of the heat storage board in order to increase the heat transfer area. Therefore, when gaps are formed on the front and back surfaces of the heat storage board, the heat transfer between the latent heat storage material and the outside is hindered, which causes a problem that the heat storage and heat dissipation characteristics of the heat storage board are deteriorated.

An object of the present invention is to provide a heat storage member that can improve heat storage and heat dissipation characteristics while suppressing deformation of the container due to a volume change of the latent heat storage material, and a heat storage container and a building material using the heat storage member.

The object is arranged in the internal space in contact with one of the pair of inner wall surfaces, a container having a pair of inner wall surfaces facing each other, and an internal space formed between the pair of inner wall surfaces. A latent heat storage material that reversibly changes between a solid phase and a liquid phase and causes expansion or contraction in the phase change, and is disposed between the latent heat storage material and the other of the pair of inner wall surfaces, and the latent heat This is achieved by a heat storage member having an elastic member that elastically deforms in response to expansion or contraction of the heat storage material.

The heat storage member of the present invention is characterized in that the container has a rigidity that does not substantially deform at an external pressure at an installation location.

In the heat storage member of the present invention, when the latent heat storage material is in a phase state in which the latent heat storage material is expanded, the elastic member is in a state contracted by a first contraction amount, and in the phase state in which the latent heat storage material is contracted, It is characterized by being in a state of contracting with a second contraction amount smaller than the first contraction amount or in a state of not contracting.

The heat storage member of the present invention is characterized in that the elastic member in a state contracted by the first contraction amount has an elastic force smaller than a force for deforming the container.

The heat storage member of the present invention is characterized in that the elastic member in a state contracted by the first contraction amount has an elastic force smaller than a force for deforming the latent heat storage material.

The heat storage member of the present invention is characterized in that the elastic member is in contact with the other of the pair of inner wall surfaces.

In the heat storage member of the present invention, the heat storage member is disposed between the elastic member and the other of the pair of inner wall surfaces, reversibly changes between a solid phase and a liquid phase, and causes expansion or contraction in the phase change. It further has a latent heat storage material.

The heat storage member of the present invention is characterized in that the elastic member includes a porous elastic body.

In the heat storage member of the present invention, the elastic member is provided in contact with the latent heat storage material and is movable according to expansion or contraction of the latent heat storage material, and the plate member is moved to the latent heat storage material. And an urging member for urging the material side.

In the heat storage member of the present invention, the biasing member includes a resin spring having one end connected to the plate-like member and the other end connected to the other of the pair of inner wall surfaces.

In the heat storage member of the present invention, the latent heat storage material includes an aqueous solution of paraffin, water, or salt.

The heat storage member of the present invention is characterized in that the latent heat storage material contains a gelling agent.

Also, the above object is achieved by a heat storage container using the heat storage member of the present invention.

Also, the above object is achieved by a building material characterized in that the heat storage member of the present invention is used.

According to the present invention, it is possible to realize a heat storage member that can improve heat storage and heat dissipation characteristics, a heat storage container and a building material using the heat storage member while suppressing deformation of the container due to a volume change of the latent heat storage material.

It is a figure which shows the general | schematic cross-section structure of the thermal storage member 1 by the 1st Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage member 2 by the modification of the 1st Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage member 3 by the 2nd Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage member 4 by the modification of the 2nd Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage member 5 by the 3rd Embodiment of this invention. It is a figure which shows schematic cross-sectional structure of the thermal storage member 6 by the modification of the 3rd Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage member 7 by the 4th Embodiment of this invention. It is a figure which shows the schematic planar structure of the thermal storage member 7 by the 4th Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage member 8 by the 5th Embodiment of this invention. It is a figure which shows schematic structure of the thermal storage container 201 by the 6th Embodiment of this invention. It is a figure which shows schematic cross-sectional structure of the thermal storage container 201 by the 6th Embodiment of this invention. It is a figure which shows schematic cross-sectional structure of the door member 110 of the thermal storage container 201 by the 6th Embodiment of this invention. It is a figure which shows schematic structure of the thermal storage container 202 by the modification of the 6th Embodiment of this invention. It is a figure which shows schematic structure of the thermal storage container 203 by the 7th Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage container 203 by the 7th Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage container 204 by the 8th Embodiment of this invention. It is a figure which shows the conventional heat storage member. It is a figure which shows the relationship between the long side length of the container of the conventional heat storage member, and an equal stress. It is a figure which shows the general | schematic cross-section structure of the thermal storage member 301 by the 9th Embodiment of this invention. It is a figure which shows an example of the manufacturing method of the thermal storage member 301 by the 9th Embodiment of this invention. It is a figure which shows an example of a structure of the connection part of the thermal storage member 301 and the cooler 350 by the 9th Embodiment of this invention. It is a figure which shows the general | schematic cross-section structure of the thermal storage member 302 by the 10th Embodiment of this invention. It is a figure which shows schematic cross-sectional structure of the thermal storage container 303 by the 11th Embodiment of this invention. FIG. 24 is a diagram showing a schematic cross-sectional configuration of a heat storage container 303 cut along line AA in FIG. 23. It is a front view which shows schematic structure of the thermal storage container 304 by the 12th Embodiment of this invention. FIG. 26 is a schematic cross-sectional view of the heat storage container 304 cut along line BB in FIG. 25. It is a figure which shows arrangement | positioning of the

thermal storage member

1290a, 1290b, 1290c in the thermal storage container 304 by the 12th Embodiment of this invention, and the direction of the cold wind which blows off from a cold wind port. It is a front view which shows schematic structure of the thermal storage container 305 by the 13th Embodiment of this invention. FIG. 29 is a schematic cross-sectional view of the heat storage container 305 cut along line CC in FIG. 28. It is a figure which shows the structure of the vegetable compartment container 1260 of the thermal storage container by 14th Embodiment of this invention. FIG. 20 is a diagram showing a modification of the configuration of the heat storage member in the ninth to fourteenth embodiments of the present invention. FIG. 20 is a diagram showing a modification of the configuration of the heat storage member in the ninth to fourteenth embodiments of the present invention. FIG. 16 is a diagram showing a modification of the configuration of the heat storage member in the first to fourteenth embodiments of the present invention. FIG. 16 is a diagram showing a modification of the configuration of the heat storage member in the first to fourteenth embodiments of the present invention. It is a figure which shows an example of arrangement | positioning of the thermal storage member 1500 and the cooler 1520. FIG.

[First Embodiment]
A heat storage member according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. In all the following drawings, the dimensions and ratios of the respective constituent elements are appropriately varied for easy understanding. 1A and 1B show a schematic cross-sectional configuration of a heat storage member 1 according to the present embodiment. Here, FIG. 1A and FIGS. 2 to 9 described later show a state where the latent heat storage material 10 is in a liquid phase (L), and FIG. 1B and FIGS. 9 (b) shows a state in which the latent heat storage material 10 is in a solid phase (S). As shown in FIGS. 1A and 1B, the heat storage member 1 of the present embodiment includes a flat plate-like latent heat storage material 10, a plate-like elastic member 60, a latent heat storage material 10, and an elastic member 60. And a container 30 that is stacked and accommodated in the plate thickness direction (left and right direction in the figure). The heat storage member 1 of this example has a rectangular flat plate shape (cuboid shape) as a whole. The heat storage member 1 is used, for example, on an inner wall surface in a cold storage (refrigerator or freezer), and is provided so that the first member 40 side of the container 30 is on the inner side.

The container 30 is a hollow box having a rectangular parallelepiped outer shape. The container 30 of this example has a configuration in which a rectangular flat plate-shaped first member 40 and a second member 50 formed in a shallow container shape as a separate body from the first member 40 are combined. The first member 40 and the second member 50 in this example are formed of a resin material such as polycarbonate, for example. The second member 50 has the same shape (rectangular flat plate shape) as the first member 40, and four side surfaces provided on each side of the bottom surface portion 51 and perpendicular to the bottom surface portion 51 (FIG. a) and (b) show only two

side portions

52 and 54. Hereinafter, four side portions including the

side portions

52 and 54 may be referred to as “

side portions

52 and 54, etc.”). is doing. Both the first member 40 and the second member 50 have relatively high rigidity. The first member 40 and the second member 50 are joined to each other by, for example, an adhesive so that the inner wall surface 40a of the first member 40 and the inner wall surface 51a of the bottom surface portion 51 are disposed to face each other. Between the inner wall surface 40a of the first member 40 and the inner wall surface 51a of the bottom surface portion 51, an internal space in which the latent heat storage material 10 and the elastic member 60 are stacked is formed. This internal space is hermetically sealed, for example. That is, the heat storage member 1 of this example has a sealed configuration.

The latent heat storage material 10 is disposed in a layered manner in the inner space of the container 30 so as to be biased toward the first member 40 side. The latent heat storage material 10 of this example has a rectangular flat plate shape. One surface (the left surface in the drawing) of the latent heat storage material 10 is in surface contact with the inner wall surface 40 a of the first member 40.

Here, the heat storage member 1 is usually used in a predetermined operating temperature range and operating pressure range. For example, the heat storage member 1 stores the cold by being cooled in the storage when the cold storage is operating, and releases the cold when the operation of the cold storage is stopped at the time of a power failure or the like, and keeps the internal storage for a predetermined time. . In this case, a temperature range from the set temperature of the cold storage during operation (internal temperature) to the ambient temperature (for example, room temperature) of the cold storage installation location is included in the operating temperature range of the heat storage member 1. Moreover, the operating pressure (external pressure) of the heat storage member 1 is, for example, atmospheric pressure.

The latent heat storage material 10 has a phase change temperature (melting point) at which the phase change between the solid phase and the liquid phase occurs reversibly within the operating temperature range of the heat storage member 1. The latent heat storage material 10 becomes a liquid phase (L) as shown in FIG. 1A at a temperature higher than the phase change temperature (for example, room temperature), and a temperature lower than the phase change temperature (for example, a cold storage during operation). In this case, a solid phase (S) is obtained as shown in FIG. The phase change temperature of the latent heat storage material 10 can be measured using a differential scanning calorimeter (DSC).

The latent heat storage material 10 of the present embodiment includes paraffin. Paraffin is a generic name for saturated chain hydrocarbons represented by the general formula C _n H _{2n + 2} . The melting point of paraffin varies depending on the number of carbons n. In the present embodiment, for example, n-tetradecane (molecular formula: C ₁₄ H ₃₀ ) is used as the latent heat storage material 10. The melting point (5.9 ° C.) of n-tetradecane is included in the operating temperature range of the heat storage member 1. In the latent heat storage material 10 of the present embodiment, the volume contracts when a phase change from the liquid phase to the solid phase occurs, and the volume expands when the phase change from the solid phase to the liquid phase occurs.

Also, the latent heat storage material 10 contains a gelling agent that gels paraffin. A gel refers to a gel that has a three-dimensional network structure formed by cross-linking molecules, and has absorbed and swelled a solvent therein. A gel is chemically stable without melting unless it breaks the structure. The gelling agent produces a gelling effect only when it is contained in an amount of several percent by weight relative to paraffin. The gel-like latent heat storage material 10 maintains a solid state as a whole even if the phase changes between the solid phase and the liquid phase, and does not have fluidity even in the liquid phase state. Therefore, since the latent heat storage material 10 itself maintains a stable shape in both the solid phase and the liquid phase, handling of the latent heat storage material 10 can be facilitated. Moreover, it becomes easy to maintain the shape of the latent heat storage material 10 regardless of the relationship between the arrangement posture of the heat storage member 1 and the vertical direction. In the gelled latent heat storage material 10, the gelling agent becomes a polymer having a molecular weight (for example, a molecular weight of 10,000 or more) larger than the molecular weight of paraffin.

The latent heat storage material 10 may be made of another material having a phase change temperature within the operating temperature range of the heat storage member 1. Moreover, you may add a flame retardant, a supercooling prevention agent, etc. to the latent heat storage material 10 as needed.

Generally, latent heat storage materials store latent heat exchanged with the outside during phase change as thermal energy. For example, in heat storage using a phase change between a solid phase and a liquid phase, heat of fusion at the melting point of the latent heat storage material is used. As long as two phases of a solid phase and a liquid phase coexist at the time of phase change, heat is continuously taken away from the outside at a constant phase change temperature, so that it is possible to suppress the temperature from rising above the melting point in a relatively long time.

The elastic member 60 is laminated with the latent heat storage material 10 in the internal space of the container 30, and is disposed so as to be biased toward the bottom surface portion 51 side of the second member 50. The elastic member 60 of this example has a rectangular flat plate shape. One surface (the left surface in the drawing) of the elastic member 60 is in surface contact with the other surface (the right surface in the drawing) of the latent heat storage material 10. The other surface (the right surface in the drawing) of the elastic member 60 is in surface contact with the inner wall surface 51 a of the bottom surface portion 51.

The elastic member 60 is formed using a porous elastic body such as foam rubber, foam plastic, or sponge. The elastic member 60 of this example has a predetermined volume modulus. Within the elastic range, the elastic member 60 contracts in volume when a compressive load is applied, and restores its original volume when the compressive load is removed. The elastic member 60 in the container 30 is elastically deformed according to the expansion or contraction of the latent heat storage material 10. That is, the elastic member 60 in the container 30 contracts within an elastic range by a compressive load applied from the latent heat storage material 10 when the latent heat storage material 10 expands, and its own elastic force (restoring force) when the latent heat storage material 10 contracts. Expands in a direction to return to the original volume. The elastic member 60 in this example is in a state in which the latent heat storage material 10 is contracted by the first contraction amount when the latent heat storage material 10 is in the expanded phase state (in this example, the liquid phase state (L)). In the state (solid phase state (S) in this example), it is in a state of being contracted by a second contraction amount smaller than the first contraction amount, or in a state of not contracting.

The distance between the inner wall surfaces 40a and 51a of the container 30 is d, the thickness of the elastic member 60 in the absence of a compressive load is te, the thickness of the latent heat storage material 10 in the expanded phase is ts1, and the contraction Assuming that the thickness of the latent heat storage material 10 in the phase state is ts2 (ts2 <ts1), d, te, ts1, and ts2 satisfy the following expressions (1) to (3).
d <te + ts1 (1)
d ≦ te + ts2 (2)
d> ts1 (3)

Here, the container 30 of this example has a rigidity that does not substantially deform at the external pressure at the installation location. That is, the container 30 is not substantially deformed even when the internal pressure is reduced when the latent heat storage material 10 contracts. The rigidity of the container 30 can be adjusted by changing the forming material or shape of the container 30 or adding a reinforcing member for reinforcing the container 30. In addition, the rigidity of the container 30 of this example bulges and deforms when the latent heat storage material 10 expands, if the latent heat storage material 10 in a contracted phase state is filled in the container 30 without a gap. A degree of rigidity may be sufficient.

In this example, the elastic force of the elastic member 60 contracted by the first contraction amount is smaller than the force for deforming the container 30. Thereby, deformation | transformation (for example, bulging deformation | transformation) of the container 30 when the latent heat storage material 10 expand | swells can be prevented. The elastic force of the elastic member 60 can be adjusted by changing the forming material, shape, etc. of the elastic member 60.

In this example, the elastic force of the elastic member 60 contracted by the first contraction amount is smaller than the force for deforming the latent heat storage material 10. Thereby, the deformation of the latent heat storage material 10 itself when the latent heat storage material 10 expands can be prevented. For the force for deforming the latent heat storage material 10, the reinforcing material (for example, a film for sealing the latent heat storage material 10) that changes the formation material or shape of the latent heat storage material 10 or reinforces the latent heat storage material 10 is added. Can be adjusted.

Further, the porous elastic body, which is a material for forming the elastic member 60, has a relatively low thermal conductivity. For this reason, the elastic member 60 also functions as a heat insulating member that insulates between the latent heat storage material 10 and the bottom surface portion 51. Therefore, it is possible to prevent heat from being released from the latent heat storage material 10 to the outside through the bottom surface portion 51.

As shown in FIG. 1 (a), for example, the latent heat storage material 10 (L) in a liquid phase at room temperature is arranged in layers so as to be in contact with almost the entire area of the inner wall surface 40a of the first member 40. The elastic member 60 laminated with the latent heat storage material 10 (L) has one surface that is in contact with almost the entire area of the latent heat storage material 10 (L) and the other surface that is approximately the entire area of the inner wall surface 51 a of the bottom surface portion 51. Are arranged in layers so as to be in contact with each other. The elastic member 60 is in a state of being contracted by the first contraction amount in the plate thickness direction. As a result, the other surface of the latent heat storage material 10 (L) is almost uniformly pressed in the surface by the elastic force of the elastic member 60, so that the latent heat storage material 10 (L) has an inner wall surface 40a with a substantially uniform pressure. Pressed to the side. Therefore, it is possible to prevent a gap from being formed between the latent heat storage material 10 (L) and the first member 40. For this reason, the heat storage characteristic at the time of storing heat in the latent heat storage material 10 via the 1st member 40 from the outside can be improved. That is, according to the heat storage member 1, high heat storage characteristics with respect to the latent heat storage material 10 (L) are obtained on the first member 40 side, and high heat insulation is obtained by the elastic member 60 on the bottom surface portion 51 side of the second member 50. . Moreover, since the latent heat storage material 10 (L) can be pressed to the inner wall surface 40a side with a substantially uniform pressure, deformation of the latent heat storage material 10 (L) can be prevented.

On the other hand, as shown in FIG. 1 (b), the latent heat storage material 10 (S) that has been cooled to a temperature lower than the melting point in a cool box or the like and has undergone a phase change from the liquid phase to the solid phase is the latent heat storage material 10 (L ) At a predetermined volume change rate. In this example, the latent heat storage material 10 (S) is reduced in thickness with respect to the latent heat storage material 10 (L), and has a height (length in the vertical direction in FIG. 1B) and width (FIG. 1). In (b), the length in the direction perpendicular to the paper surface also decreases. Thereby, the space | gap 70 is formed in frame shape between the latent heat storage material 10 (S),

side part

52,54 grade | etc.,.

When the latent heat storage material 10 (S) contracts in the plate thickness direction, the elastic member 60 expands in a direction to return to the original volume. Thereby, the elastic member 60 is in a state where it is contracted in the plate thickness direction with a second contraction amount smaller than the first contraction amount, or is not contracted. For example, the thickness in the plate thickness direction that increases due to expansion of the elastic member 60 is substantially equal to the thickness in the plate thickness direction that decreases due to contraction of the latent heat storage material 10. Therefore, the sum of the thickness of the latent heat storage material 10 and the thickness of the elastic member 60 (the thickness in the thickness direction of the internal space) is substantially the same before and after the phase change from the liquid phase to the solid phase of the latent heat storage material 10. Therefore, the deformation of the container 30 is further suppressed. Further, when the elastic member 60 is in the contracted state by the second contraction amount, the other surface of the latent heat storage material 10 (S) is pressed almost uniformly in the plane by the elastic force of the elastic member 60. For this reason, the latent heat storage material 10 (S) is pressed against the inner wall surface 40a side with a substantially uniform pressure. Therefore, since it is possible to prevent a gap from being formed between the latent heat storage material 10 (S) and the first member 40, heat is radiated from the latent heat storage material 10 (S) to the outside via the first member 40. The heat dissipation characteristics can be improved. That is, according to the heat storage member 1, high heat dissipation characteristics from the latent heat storage material 10 (S) are obtained on the first member 40 side, and high heat insulation is obtained by the elastic member 60 on the bottom surface 51 side of the second member 50. It is done. Moreover, since the latent heat storage material 10 (S) can be pressed against the inner wall surface 40a side with a substantially uniform pressure, deformation of the latent heat storage material 10 (S) can be prevented.

From the state shown in FIG. 1B, for example, when the temperature in the cold storage chamber rises due to a power failure or the like, and the temperature of the latent heat storage material 10 (S) increases to reach the melting point, the latent heat storage material 10 becomes liquid from the solid phase. Change phase to phase. At this time, the heat of fusion (cold heat) of the latent heat storage material 10 is released into the cool box through the first member 40, and the cool box is kept cool for a predetermined time. When the phase change from the solid phase to the liquid phase of the latent heat storage material 10 is completed, the state returns to the state shown in FIG. That is, the latent heat storage material 10 (L) that has undergone a phase change from the solid phase to the liquid phase expands at a predetermined volume change rate with respect to the latent heat storage material 10 (S). When the latent heat storage material 10 expands in the plate thickness direction, the elastic member 60 contracts within the elastic range due to the compressive load applied from the latent heat storage material 10. For example, the thickness in the plate thickness direction that decreases as the elastic member 60 contracts is substantially equal to the thickness in the plate thickness direction that increases due to the expansion of the latent heat storage material 10. Therefore, the sum of the thickness of the latent heat storage material 10 and the thickness of the elastic member 60 (thickness in the thickness direction of the internal space) is substantially the same before and after the phase change of the latent heat storage material 10 from the solid phase to the liquid phase. Therefore, the deformation of the container 30 is further suppressed.

Next, an example of a method for manufacturing the heat storage member 1 according to the present embodiment will be briefly described. First, a rectangular flat plate-like first member 40 and a shallow container-like second member 50 are formed by injection molding using polycarbonate. Further, the gel-like latent heat storage material 10 is formed by adding a gelling agent of several weight% to n-tetradecane. Moreover, the elastic member 60 is formed using a porous elastic body. Next, the first member 40 and the second member 50 are combined in an atmospheric temperature higher than the melting point of n-tetradecane, and the latent heat storage material 10 (L) and the elastic member 60 are stacked and filled in the internal space. . At this time, the first member 40 and the second member 50 are pressed with a predetermined pressure, and the elastic member 60 contracts with a predetermined contraction amount (first contraction amount). Thereafter, the frame-shaped end surfaces of the

side members

52 and 54 of the second member 50 and the first member 40 are sealed so that the internal space filled with the latent heat storage material 10 (L) and the elastic member 60 is hermetically sealed. The outer frame portion of the inner surface is joined using an adhesive. When this step is performed at atmospheric pressure, the pressure of the gas remaining in the numerous pores of the elastic member 60 becomes atmospheric pressure. By the above procedure, the heat storage member 1 shown in FIG.

2 (a) and 2 (b) show a schematic cross-sectional configuration of the heat storage member 2 according to a modification of the present embodiment. In the heat storage member 2 of this modification, a frame-shaped elastic member 62 is provided on the outer peripheral portion of the latent heat storage material 10 in which a gap 70 (see FIG. 1B) can be formed. The elastic member 62 is formed integrally with the elastic member 60. A part of the elastic member 62 is provided between the upper side end surface 10 a of the latent heat storage material 10 and the side surface portion 52 of the second member 50. As shown in FIG. 2 (a), when the part of the elastic member 62 is in a phase state in which the latent heat storage material 10 is expanded (in this example, a liquid phase state L), the method of the side end face 10a and the side surface portion 52 is used. It is in a state of contracting in a linear direction with a predetermined contraction amount. On the other hand, as shown in FIG. 2B, when the latent heat storage material 10 is in a contracted phase state (in this example, a solid phase state (S)), the part of the elastic member 62 contracts smaller than the contraction amount. It is in a state of being contracted by an amount or not contracting.

The respective portions of the elastic member 62 are similarly provided between the other three side end surfaces of the latent heat storage material 10 and the other three side surfaces of the second member 50. In this example, the elastic member 62 is formed integrally with the elastic member 60, but may be a separate member from the elastic member 60. It is desirable that the elastic member 62 has a structure with high heat insulating properties as with the elastic member 60. According to this modification, it is possible to prevent the gap 70 from being formed between the latent heat storage material 10 and the side surfaces 52 and 54 when the latent heat storage material 10 contracts. Thereby, when the phase change is repeated, it is possible to prevent the position of the latent heat storage material 10 from moving in a plane parallel to the inner wall surface 40a. In addition, since the elastic member 62 is provided between the latent heat storage material 10 and the

side surface parts

52, 54, etc. in both the liquid phase state and the solid phase state, the latent heat storage material 10 and the side surface part 52, It is possible to insulate between 54 and the like.

As described above, the heat storage member according to the present embodiment includes a container 30 including a pair of inner wall surfaces 40a and 51a facing each other and an internal space formed between the pair of inner wall surfaces 40a and 51a, A latent heat storage material 10 that is disposed in the internal space in contact with the inner wall surface 40a, reversibly changes between the solid phase and the liquid phase, and causes expansion or contraction in the phase change, and the latent heat storage material 10 and the other And an elastic member 60 that is elastically deformed in response to expansion or contraction of the latent heat storage material 10.

According to this configuration, even if the latent heat storage material 10 expands or contracts, the latent heat storage material 10 is pressed against the one inner wall surface 40 a by the elastic force of the elastic member 60. Thereby, since the latent heat storage material 10 closely_contact | adheres to the inner wall surface 40a, it can prevent that a space | gap is formed between the latent heat storage material 10 and the inner wall surface 40a. Therefore, the heat storage characteristics when heat is stored in the latent heat storage material 10 from the outside through the inner wall surface 40a (first member 40), and heat is radiated from the latent heat storage material 10 to the outside through the inner wall surface 40a (first member 40). The heat dissipation characteristics can be improved.

Moreover, since the elastic member 60 is elastically deformed according to the expansion or contraction of the latent heat storage material 10, it functions as a buffer material that absorbs the volume change of the latent heat storage material 10. Therefore, deformation (particularly bulging deformation) of the container 30 due to a volume change of the latent heat storage material 10 can be suppressed. Further, since the deformation of the container 30 can be suppressed, the durability of the container 30 can be improved.

[Second Embodiment]
Next, the heat storage member by the 2nd Embodiment of this invention is demonstrated using FIG.3 and FIG.4. 3A and 3B show a schematic cross-sectional configuration of the heat storage member 3 according to the present embodiment. In addition, about the component which has the same function and effect | action as the

thermal storage members

1 and 2 by 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. The heat storage member 3 is used, for example, as a building material (wall material, floor material, ceiling material, etc.) having a function for maintaining the room temperature at a predetermined temperature. When used as a building material, the operating temperature range of the heat storage member 3 is about 20 ° C to 30 ° C. The heat storage member 3 is provided such that the first member 40 side is the indoor side and the elastic member 60 side is the outdoor side.

The latent heat storage material 10 used for the heat storage member 3 of the present embodiment includes an aqueous solution of sodium sulfate (a sodium salt of sulfuric acid) and a gelling agent that gels the sodium sulfate aqueous solution. The phase change temperature of the aqueous sodium sulfate solution is about 25 ° C. The volume of the sodium sulfate aqueous solution expands when a phase change from the liquid phase to the solid phase occurs, and the volume contracts when the phase change from the solid phase to the liquid phase occurs.

As shown in FIG. 3 (a), the latent heat storage material 10 (L) that is in a liquid phase at a temperature higher than the melting point has a frame between the latent heat storage material 10 (L) and the side surfaces 52, 54, and the like. Are arranged in layers so as to be in surface contact with the inner wall surface 40a so that a void 70 is formed. The elastic member 60 laminated with the latent heat storage material 10 (L) has one surface in surface contact with the latent heat storage material 10 (L) and the other surface in surface contact with the inner wall surface 51 a of the bottom surface portion 51. Are arranged in layers. The elastic member 60 is in a state where it is contracted in the plate thickness direction with a second contraction amount smaller than the first contraction amount, or is not contracted.

When the elastic member 60 is in the contracted state with the second contraction amount, the other surface of the latent heat storage material 10 (L) is pressed almost uniformly in the plane by the elastic force of the elastic member 60. For this reason, the latent heat storage material 10 (L) is pressed against the inner wall surface 40a side with a substantially uniform pressure. Therefore, since it is possible to prevent a gap from being formed between the latent heat storage material 10 (L) and the first member 40, heat is stored in the latent heat storage material 10 (L) from the outside via the first member 40. The heat storage characteristic at the time can be improved. That is, according to the heat storage member 3, high heat storage characteristics with respect to the latent heat storage material 10 (L) are obtained on the first member 40 side, and high heat insulation is obtained by the elastic member 60 on the bottom surface portion 51 side of the second member 50. . Moreover, since the latent heat storage material 10 (L) can be pressed to the inner wall surface 40a side with a substantially uniform pressure, deformation of the latent heat storage material 10 (L) can be prevented.

On the other hand, as shown in FIG. 3 (b), the latent heat storage material 10 (S) cooled to a temperature lower than the melting point and phase-changed from the liquid phase to the solid phase is predetermined with respect to the latent heat storage material 10 (L). It expands at a volume change rate of. In this example, the latent heat storage material 10 (S) increases in thickness with respect to the latent heat storage material 10 (L), and has a height (length in the vertical direction in FIG. 3B) and width (FIG. 3). In (b), the length in the direction perpendicular to the paper surface also increases. Thereby, all or a part of the frame-shaped gap 70 is filled with the expanded latent heat storage material 10 (S).

When the latent heat storage material 10 (S) expands in the plate thickness direction, the elastic member 60 contracts within the elastic range. As a result, the elastic member 60 is contracted by the first contraction amount. As a result, the other surface of the latent heat storage material 10 (S) is pressed almost uniformly within the surface by the elastic force of the elastic member 60. For this reason, the latent heat storage material 10 (S) is pressed against the inner wall surface 40a side with a substantially uniform pressure. Therefore, since it is possible to prevent a gap from being formed between the latent heat storage material 10 (S) and the first member 40, heat is radiated from the latent heat storage material 10 (S) to the outside via the first member 40. The heat dissipation characteristics can be improved. That is, according to the heat storage member 3, high heat dissipation characteristics from the latent heat storage material 10 (S) are obtained on the first member 40 side, and high heat insulation is obtained by the elastic member 60 on the bottom surface 51 side of the second member 50. It is done. Moreover, since the latent heat storage material 10 (S) can be pressed against the inner wall surface 40a side with a substantially uniform pressure, deformation of the latent heat storage material 10 (S) can be prevented.

3 (b), when the temperature of the latent heat storage material 10 (S) rises and reaches the melting point, the latent heat storage material 10 changes from a solid phase to a liquid phase. At this time, the melting heat (cold heat) of the latent heat storage material 10 is released into the room through the first member 40, and the temperature rise in the room is suppressed for a predetermined time. When the phase change of the latent heat storage material 10 from the solid phase to the liquid phase is completed, the state shown in FIG. That is, the latent heat storage material 10 (L) that has undergone a phase change from the solid phase to the liquid phase contracts at a predetermined volume change rate with respect to the latent heat storage material 10 (S). When the latent heat storage material 10 (L) contracts in the plate thickness direction, the elastic member 60 expands in a direction to return to the original volume. Thereby, the elastic member 60 is in a state where it is contracted in the plate thickness direction with a second contraction amount smaller than the first contraction amount, or is not contracted. For example, the thickness in the plate thickness direction that increases due to expansion of the elastic member 60 is substantially equal to the thickness in the plate thickness direction that decreases due to contraction of the latent heat storage material 10. Therefore, the sum of the thickness of the latent heat storage material 10 and the thickness of the elastic member 60 (the thickness in the thickness direction of the internal space) is substantially the same before and after the phase change from the liquid phase to the solid phase of the latent heat storage material 10. Therefore, the deformation of the container 30 is further suppressed.

Next, an example of a method for manufacturing the heat storage member 3 according to the present embodiment will be briefly described. First, a rectangular flat plate-like first member 40 and a shallow container-like second member 50 are formed by injection molding using polycarbonate. Further, a gelling agent is added to the sodium sulfate aqueous solution to form the gel-like latent heat storage material 10, and the phase is changed from the liquid phase to the solid phase by cooling to a temperature lower than the phase change temperature (25 ° C.). Moreover, the elastic member 60 is formed using a porous elastic body. Next, the first member 40 and the second member 50 are combined in an atmospheric temperature lower than the phase change temperature of the aqueous sodium sulfate solution, and the latent heat storage material 10 (S) and the elastic member 60 are stacked in the internal space. Fill. At this time, the first member 40 and the second member 50 are pressed with a predetermined pressure, and the elastic member 60 contracts with a predetermined contraction amount (first contraction amount). Thereafter, the frame-shaped end surfaces of the second members 50 such as the

side portions

52 and 54 and the first member 40 are sealed so that the internal space filled with the latent heat storage material 10 (S) and the elastic member 60 is hermetically sealed. The outer frame portion of the inner surface is joined using an adhesive. When this step is performed at atmospheric pressure, the pressure of the gas remaining in the numerous pores of the elastic member 60 becomes atmospheric pressure. With the above procedure, the heat storage member 1 shown in FIG.

4 (a) and 4 (b) show a schematic cross-sectional configuration of the heat storage member 4 according to a modification of the present embodiment. In the heat storage member 4 of this modification, the same elasticity as that of the elastic member 62 shown in FIGS. 2A and 2B is formed on the outer peripheral portion of the latent heat storage material 10 in which a gap 70 (see FIG. 3A) can be formed. A member 62 is provided. According to this modification, similarly to the heat storage member 2 shown in FIGS. 2A and 2B, when the latent heat storage material 10 contracts, the latent heat storage material 10 (L) and the

side portions

52, 54, etc. It is possible to prevent the gap 70 from being formed therebetween. Moreover, if the elastic member 62 has a structure with high heat insulation, between the latent heat storage material 10 and the

side parts

52 and 54 grade | etc., Can be insulated.

[Third Embodiment]
Next, the heat storage member by the 3rd Embodiment of this invention is demonstrated using FIG.5 and FIG.6. 5A and 5B show a schematic cross-sectional configuration of the heat storage member 5 according to the present embodiment. In addition, about the component which has the same function and effect | action as the

thermal storage members

1 and 2 by 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. The heat storage member 5 is used, for example, as a partition plate of a heat storage container (for example, the heat storage container 203 shown in FIGS. 14 and 15) including a plurality of cold storage chambers having different cold storage temperatures.

As shown in FIGS. 5A and 5B, the heat storage member 5 of the present embodiment includes the latent

heat storage materials

10 and 20, the elastic member 60, the latent heat storage material 10, the elastic member 60, and the latent heat storage material 20. Are stacked in this order and accommodated in a container 30. In this example, the latent heat storage material 10 and the latent heat storage material 20 have mutually different phase change temperatures. Both the latent

heat storage materials

10 and 20 contract in volume when a phase change from a liquid phase to a solid phase occurs, and expand in volume when a phase change from a solid phase to a liquid phase occurs.

The latent heat storage material 10 is disposed in a layered manner in the inner space of the container 30 so as to be biased toward the first member 40 side. The latent heat storage material 10 of this example has a rectangular flat plate shape. One surface (the left surface in the drawing) of the latent heat storage material 10 is in surface contact with the inner wall surface 40 a of the first member 40. The latent heat storage material 10 includes paraffin and a gelling agent that gels the paraffin. The phase change temperature of the latent heat storage material 10 of this example is about 6 ° C.

The elastic member 60 is arranged in a layer between the latent heat storage material 10 and the latent heat storage material 20 in the internal space of the container 30. The elastic member 60 of this example has a rectangular flat plate shape. One surface (the left surface in the drawing) of the elastic member 60 is in surface contact with the other surface (the right surface in the drawing) of the latent heat storage material 10. The elastic member 60 is elastically deformed according to the expansion or contraction of the latent

heat storage materials

10 and 20. In other words, the elastic member 60 contracts within the elastic range by the compressive load applied from the latent

heat storage materials

10 and 20 when the latent

heat storage materials

10 and 20 expand, and the elastic member 60 by the elastic force of itself when the latent

heat storage materials

10 and 20 contract. It expands in a direction to return to the volume of. The elastic member 60 of this example is in a contracted state with a first contraction amount when both of the latent

heat storage materials

10 and 20 are in the expanded phase state (in this example, the liquid phase state (L)), and the latent

heat storage material

10 , 20 are in a contracted phase state (in this example, a solid phase state (S)), they are contracted by a second contraction amount smaller than the first contraction amount, or are not contracted. The elastic member 60 of this example is formed using a porous elastic body having a relatively low thermal conductivity. The elastic member 60 also functions as a heat insulating member that insulates between the latent heat storage material 10 and the latent heat storage material 20.

The latent heat storage material 20 is arranged in a layered manner in the inner space of the container 30 so as to be biased toward the bottom surface 51 of the second member 50. The latent heat storage material 20 of this example has a rectangular flat plate shape. One surface (left surface in the drawing) of the latent heat storage material 20 is in surface contact with the other surface (right surface in the drawing) of the elastic member 60. The other surface (the surface on the right side in the figure) of the latent heat storage material 20 is in surface contact with the inner wall surface 51 a of the bottom surface portion 51. The latent heat storage material 20 includes a paraffin having a carbon number different from that of the paraffin contained in the latent heat storage material 10 and a gelling agent that gels the paraffin. The phase change temperature of the latent heat storage material 20 of this example is about 9 ° C.

As shown in FIG. 5 (a), the latent heat storage materials 10 (L) and 20 (L) are both in a liquid phase at room temperature. The elastic member 60 is in a state of being contracted by the first contraction amount in the plate thickness direction. The latent heat storage material 10 (L) is pressed against the inner wall surface 40 a side with a substantially uniform pressure by the elastic force of the elastic member 60. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 10 (L) and the first member 40. Therefore, the heat storage characteristic at the time of storing heat in the latent heat storage material 10 (L) from the outside via the first member 40 can be improved. Further, the latent heat storage material 20 (L) is pressed against the inner wall surface 51 a side with a substantially uniform pressure by the elastic force of the elastic member 60. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 20 (L) and the bottom surface portion 51. Therefore, the heat storage characteristic at the time of storing heat in the latent heat storage material 20 (L) from the outside via the bottom face part 51 can be improved. That is, according to the heat storage member 5, high heat storage characteristics for the latent heat storage material 10 (L) can be obtained on the first member 40 side, and high heat storage characteristics for the latent heat storage material 20 (L) can be obtained on the bottom surface portion 51 side. Further, since the latent heat storage materials 10 (L) and 20 (L) can be pressed to the inner wall surface 40 a side and the inner wall surface 51 a side with substantially uniform pressure, the latent heat storage materials 10 (L) and 20 (L) Deformation can be prevented.

On the other hand, as shown in FIG. 5 (b), the latent heat storage materials 10 (S) and 20 (S) are both in a solid state when cooled in a cool box or the like. The latent heat storage materials 10 (S) and 20 (S) contract at a predetermined volume change rate with respect to the latent heat storage materials 10 (L) and 20 (L), respectively. In this example, the latent heat storage material 10 (S) is reduced in thickness and height and width with respect to the latent heat storage material 10 (L). Thereby, the space | gap 70 is formed in frame shape between the latent heat storage material 10 (S),

side part

52,54 grade | etc.,. In addition, the latent heat storage material 20 (S) is reduced in thickness and height and width with respect to the latent heat storage material 20 (S). Thereby, the space | gap 72 is formed in frame shape between the latent heat storage material 20 (S),

side part

52,54 grade | etc.,.

When the latent heat storage materials 10 (S) and 20 (S) contract in the plate thickness direction, the elastic member 60 expands in a direction to return to the original volume. Thereby, the elastic member 60 is in a state where it is contracted in the plate thickness direction with a second contraction amount smaller than the first contraction amount, or is not contracted. For example, the thickness in the plate thickness direction that increases due to expansion of the elastic member 60 is the thickness in the plate thickness direction that decreases due to the contraction of the latent heat storage material 10 and the thickness in the plate thickness direction that decreases due to the contraction of the latent heat storage material 20. It is almost equal to the sum. Therefore, the sum of the thickness of the latent heat storage material 10, the thickness of the latent heat storage material 20, and the thickness of the elastic member 60 (before and after the phase change from the liquid phase to the solid phase of the latent heat storage materials 10, 20). (Thickness in the plate thickness direction) can be made substantially the same, so that deformation of the container 30 is further suppressed.

Further, when the elastic member 60 is in the contracted state by the second contraction amount, the latent heat storage material 10 (S) is pressed to the inner wall surface 40 a side with a substantially uniform pressure by the elastic force of the elastic member 60. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 10 (S) and the first member 40. Therefore, it is possible to improve the heat dissipation characteristics when heat is radiated from the latent heat storage material 10 (S) to the outside via the first member 40. On the other hand, the latent heat storage material 20 (S) is pressed against the inner wall surface 51 a side with a substantially uniform pressure by the elastic force of the elastic member 60. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 20 (S) and the bottom surface portion 51 of the second member 50. Therefore, it is possible to improve the heat radiation characteristics when heat is radiated from the latent heat storage material 20 (S) to the outside through the bottom surface portion 51. That is, according to the heat storage member 5, high heat radiation characteristics from the latent heat storage material 10 (S) can be obtained on the first member 40 side, and from the latent heat storage material 20 (S) on the bottom surface 51 side of the second member 50. High heat dissipation characteristics can be obtained.

Further, when the elastic member 60 is contracted by the second contraction amount, the latent heat storage materials 10 (S) and 20 (S) are pressed against the inner wall surface 40a side and the inner wall surface 51a side with substantially uniform pressure, respectively. Therefore, deformation of the latent heat storage material 10 (S), 20 (S) can be prevented.

From the state shown in FIG. 5B, when the temperature in the cold storage chamber rises due to, for example, a power failure and the temperature of the latent heat storage material 10 (S) reaches the melting point, the latent heat storage material 10 changes from the solid phase to the liquid phase. Change. At this time, the heat of fusion (cold heat) of the latent heat storage material 10 is released into the cool box through the first member 40, and the cool box is kept cool for a predetermined time. Thereafter, when the temperature in the cool box further rises and the temperature of the latent heat storage material 20 (S) reaches the melting point, the latent heat storage material 20 changes phase from a solid phase to a liquid phase. At this time, the heat of fusion of the latent heat storage material 20 is released into the cool box through the bottom surface portion 51, and the inside of the cool box is kept cool for a predetermined time. When the phase change from the solid phase to the liquid phase of the latent

heat storage materials

10, 20 is completed, the state returns to the state shown in FIG. That is, the latent heat storage materials 10 (L) and 20 (L) that have undergone a phase change from the solid phase to the liquid phase expand at a predetermined volume change rate with respect to the latent heat storage materials 10 (S) and 20 (S). When the latent

heat storage materials

10 and 20 expand in the plate thickness direction, the elastic member 60 contracts within the elastic range due to the compression load applied from the latent

heat storage materials

10 and 20. For example, the thickness in the plate thickness direction that decreases as the elastic member 60 contracts is the thickness in the plate thickness direction increased by the expansion of the latent heat storage material 10 and the thickness in the plate thickness direction increased by the expansion of the latent heat storage material 20. It is almost equal to the sum. Therefore, the sum of the thickness of the latent heat storage material 10, the thickness of the latent heat storage material 20, and the thickness of the elastic member 60 (before and after the phase change from the solid phase to the liquid phase of the latent heat storage materials 10, 20). (Thickness in the plate thickness direction) can be made substantially the same, so that deformation of the container 30 is further suppressed.

In the present embodiment, the latent

heat storage materials

10 and 20 having different phase change temperatures are taken as an example, but the latent

heat storage materials

10 and 20 may have the same phase change temperature. In the present embodiment, as the latent

heat storage materials

10 and 20, a combination of latent heat storage materials whose volumes expand due to a phase change from the liquid phase to the solid phase is taken as an example, but the phase from the liquid phase to the solid phase is exemplified. It may be a combination of latent heat storage materials whose volume contracts due to change, or a latent heat storage material whose volume expands due to a phase change from the liquid phase to the solid phase, and a volume due to the phase change from the liquid phase to the solid phase. A combination with a shrinking latent heat storage material may be used.

6 (a) and 6 (b) show a schematic cross-sectional configuration of the heat storage member 6 according to a modification of the present embodiment. In the heat storage member 6 of this modification, the elastic member 62 is provided in the outer peripheral part of the latent heat storage material 10 in which the space | gap 70 (refer FIG.5 (b)) can be formed, and the latent heat storage material 20 in which the space | gap 72 can be formed. The elastic member 64 is provided in the outer peripheral part. The

elastic members

62 and 64 are formed integrally with the elastic member 60, for example. According to this modification, when the latent heat storage material 10 contracts, it is possible to prevent the gap 70 from being formed between the latent heat storage material 10 and the side surfaces 52, 54, etc., and the latent heat storage material 20 contracts. In this case, it is possible to prevent the gap 72 from being formed between the latent heat storage material 20 and the side surfaces 52, 54 and the like. Moreover, if the

elastic members

62 and 64 have a structure with high heat insulation, between the latent

heat storage materials

10 and 20 and the

side surface parts

52 and 54 grade | etc., Can be insulated.

[Fourth Embodiment]
Next, the heat storage member by the 4th Embodiment of this invention is demonstrated using FIG.7 and FIG.8. 7A and 7B show a schematic cross-sectional configuration of the heat storage member 7 according to the present embodiment. FIGS. 8A and 8B show a schematic plan configuration of only the latent heat storage material 10 and the elastic member 60 of the heat storage member 7 according to the present embodiment. In addition, about the component which has the same function and effect | action as the heat storage member 1 by 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 7 and 8, the heat storage member 7 of the present embodiment includes a latent heat storage material 10 filled in the container 30, and a recess 11 formed on the bottom surface 51 side surface of the latent heat storage material 10. And an elastic member 60 provided in the recess 11. The latent heat storage material 10 of this example contracts in volume when a phase change from the liquid phase to the solid phase occurs, and expands in volume when the phase change from the solid phase to the liquid phase occurs. The latent heat storage material 10 includes paraffin and a gelling agent that gels the paraffin. The phase change temperature of the latent heat storage material 10 is about 5 ° C. The latent heat storage material 10 has a square flat plate shape. On the surface of the latent heat storage material 10 on the bottom surface 51 side, nine recesses 11 are formed that are arranged in a 3 × 3 matrix as viewed from the normal direction of the surface. In each of the nine recesses 11, an elastic member 60 having substantially the same volume as that of the recess 11 is embedded with almost no gap. The elastic member 60 has a square flat plate shape (cuboid shape).

7 (a) and 8 (a), the latent heat storage material 10 (L) is in a liquid phase at room temperature. The elastic member 60 in the recess 11 is in a state contracted with a predetermined contraction amount in the plate thickness direction, and is also contracted with a predetermined contraction amount in the width direction and the depth direction orthogonal to the plate thickness direction. The latent heat storage material 10 (L) is pressed against the inner wall surface 40 a side with a substantially uniform pressure by the elastic force of the elastic member 60. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 10 (L) and the first member 40. Therefore, the heat storage characteristic at the time of storing heat in the latent heat storage material 10 (L) from the outside via the first member 40 can be improved.

On the other hand, as shown in FIGS. 7 (b) and 8 (b), the latent heat storage material 10 (S) becomes a solid phase when cooled in a cool box or the like. The latent heat storage material 10 (S) contracts at a predetermined volume change rate with respect to the latent heat storage material 10 (L). Each recessed part 11 expands by contraction of the latent heat storage material 10 (S). In addition, a gap 70 is formed in a frame shape between the latent heat storage material 10 (S) and the

side surface portions

52 and 54.

When the concave portion 11 expands, the elastic member 60 in the concave portion 11 expands in a direction to return to the original volume. Accordingly, the elastic member 60 is contracted or contracted in a contraction amount smaller than the state shown in FIGS. 7A and 8A in the three directions of the plate thickness direction, the width direction, and the depth direction. No state. The expansion of the elastic member 60 suppresses the volume change of the latent heat storage material 10 and the elastic member 60 as a whole before and after the phase change from the liquid phase to the solid phase of the latent heat storage material 10. More suppressed.

Further, when the elastic member 60 is in the contracted state in the plate thickness direction, the latent heat storage material 10 (S) is pressed against the inner wall surface 40 a side with a substantially uniform pressure by the elastic force of the elastic member 60. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 10 (S) and the first member 40. Therefore, it is possible to improve the heat dissipation characteristics when heat is radiated from the latent heat storage material 10 (S) to the outside via the first member 40.

In the present embodiment, a frame-like elastic member may be provided on the outer peripheral portion of the latent heat storage material 10 in which the gap 70 can be formed, similarly to the configuration shown in FIGS.

[Fifth Embodiment]
Next, the heat storage member by the 5th Embodiment of this invention is demonstrated using FIG. 9A and 9B show a schematic cross-sectional configuration of the heat storage member 8 according to the present embodiment. In addition, about the component which has the same function and effect | action as the heat storage member 1 by 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 9A and 9B, the heat storage member 8 of the present embodiment includes a plate-like member 66 provided in contact with the latent heat storage material 10 as an elastic member, and a plate-like member 66. And a compression spring 68 (an example of an urging member) that urges the latent heat storage material 10 side. The latent heat storage material 10 includes paraffin and a gelling agent that gels the paraffin. The phase change temperature of the latent heat storage material 10 of this example is about 5 ° C. In this example, the second member 50 is formed of a resin material (for example, polycarbonate), and the first member 40 is formed of a metal (for example, aluminum) having a higher thermal conductivity.

The plate member 66 has, for example, a rectangular flat plate shape. One surface (the left surface in the drawing) of the plate-like member 66 is in surface contact with almost the entire area of the other surface (the right surface in the drawing) of the latent heat storage material 10. The plate-like member 66 is movable in the plate thickness direction of the heat storage member 8 according to the expansion or contraction of the latent heat storage material 10. The plate-like member 66 is formed of, for example, the same forming material (polycarbonate) as the second member 50.

An air layer 69 is formed between the other surface (the surface on the right side in the drawing) of the plate-like member 66 and the inner wall surface 51a. The air layer 69 has a function of insulating between the latent heat storage material 10 and the bottom surface portion 51. When the heat storage member 8 is a sealed type, the air in the air layer 69 also functions as a part of a biasing member that biases the plate-like member 66 toward the latent heat storage material 10 side. The thickness of the air layer 69 changes with the movement of the plate-like member 66 (extension and contraction of the compression spring 68).

The compression spring 68 is provided in the air layer 69. In this example, a plurality of compression springs 68 are arranged at a predetermined arrangement density. One end of the compression spring 68 is connected to the other surface of the plate-like member 66, and the other end is connected to the inner wall surface 51a. The compression spring 68 expands and contracts in the plate thickness direction of the heat storage member 8. The compression spring 68 is in a compressed state with the first compression amount when the latent heat storage material 10 is in the expanded phase state (in this example, the liquid phase state (L)), and the latent heat storage material 10 is in a contracted phase state ( In this example, in the solid phase state (S)), the state is compressed with a second compression amount smaller than the first compression amount, or is not compressed. At least in the phase state in which the latent heat storage material 10 is expanded, the plate-like member 66 is urged toward the latent heat storage material 10 by the elastic force of the compression spring 68. The compression spring 68 of this example is formed using a resin material (for example, engineering plastic) having a relatively low thermal conductivity. Thereby, the compression spring 68 can suppress heat transfer between the plate-like member 66 and the bottom surface portion 51.

As shown in FIG. 9 (a), the latent heat storage material 10 (L) is in a liquid phase at room temperature. The compression spring 68 is in a state compressed by the first compression amount in the plate thickness direction. The compressed compression spring 68 urges the plate-like member 66 toward the latent heat storage material 10 (L). As a result, the latent heat storage material 10 (L) is pressed against the inner wall surface 40 a side by the plate-like member 66 with a substantially uniform pressure. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 10 (L) and the first member 40. Therefore, the heat storage characteristic at the time of storing heat in the latent heat storage material 10 (L) from the outside via the first member 40 can be improved. That is, according to the heat storage member 8, high heat storage characteristics with respect to the latent heat storage material 10 (L) are obtained on the first member 40 side, and high heat insulation is obtained by the air layer 69 on the bottom surface portion 51 side. Moreover, since the latent heat storage material 10 (L) can be pressed to the inner wall surface 40a side with a substantially uniform pressure, deformation of the latent heat storage material 10 (L) can be prevented.

On the other hand, as shown in FIG. 9 (b), the latent heat storage material 10 (S) becomes a solid phase when cooled in a cool box or the like. The latent heat storage material 10 (S) contracts at a predetermined volume change rate with respect to the latent heat storage material 10 (L). When the latent heat storage material 10 (S) contracts in the plate thickness direction, the compression spring 68 expands in a direction to return to the original shape, and is compressed in the plate thickness direction by a second compression amount smaller than the first compression amount. State or uncompressed state. For example, the thickness of the air layer 69 that increases due to the expansion of the compression spring 68 is substantially equal to the thickness in the plate thickness direction that is decreased due to the contraction of the latent heat storage material 10. Therefore, before and after the phase change from the liquid phase to the solid phase of the latent heat storage material 10, the sum of the thickness of the latent heat storage material 10, the thickness of the plate-like member 66, and the thickness of the air layer 69 (the thickness of the internal space). (Thickness in the direction) can be made substantially the same, so that deformation of the container 30 is further suppressed.

Further, when the compression spring 68 is compressed with the second compression amount, the latent heat storage material 10 (S) is pressed against the inner wall surface 40 a side with a substantially uniform pressure by the elastic force of the compression spring 68. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 10 (S) and the first member 40. Therefore, it is possible to improve the heat dissipation characteristics when heat is radiated from the latent heat storage material 10 (S) to the outside via the first member 40. That is, according to the heat storage member 8, high heat dissipation characteristics from the latent heat storage material 10 (S) are obtained on the first member 40 side, and high heat insulation is obtained by the air layer 69 on the bottom surface portion 51 side. Further, when the compression spring 68 is in the compressed state by the second compression amount, the latent heat storage material 10 (S) can be pressed to the inner wall surface 40a side with a substantially uniform pressure. ) Deformation can be prevented.

From the state shown in FIG. 9B, when the temperature in the cold storage chamber rises due to, for example, a power failure and the temperature of the latent heat storage material 10 (S) reaches the melting point, the latent heat storage material 10 changes from a solid phase to a liquid phase. Change. At this time, the heat of fusion (cold heat) of the latent heat storage material 10 is released into the cool box through the first member 40, and the cool box is kept cool for a predetermined time. When the phase change of the latent heat storage material 10 from the solid phase to the liquid phase is completed, the state shown in FIG. That is, the latent heat storage material 10 (L) that has undergone a phase change from the solid phase to the liquid phase expands at a predetermined volume change rate with respect to the latent heat storage material 10 (S). When the latent heat storage material 10 expands in the plate thickness direction, the compression spring 68 is compressed within the elastic range by a compression load applied from the latent heat storage material 10 via the plate member 66. For example, the thickness of the air layer 69 that is decreased by the compression of the compression spring 68 is substantially equal to the thickness in the plate thickness direction increased by the expansion of the latent heat storage material 10. Therefore, before and after the phase change of the latent heat storage material 10 from the solid phase to the liquid phase, the sum of the thickness of the latent heat storage material 10, the thickness of the plate-like member 66, and the thickness of the air layer 69 (the thickness of the internal space) (Thickness in the direction) can be made substantially the same, so that deformation of the container 30 is further suppressed.

Further, in the heat storage member 8 of the present embodiment, since the first member 40 is made of metal, the heat storage speed to the latent heat storage material 10 and the heat release speed from the latent heat storage material 10 can be improved. In other embodiments, the first member 40 may be made of metal in order to improve the heat storage speed and the heat release speed of the latent heat storage material 10. In the third embodiment, the bottom surface portion 51 of the second member 50 may be made of metal in order to improve the heat storage speed and heat release speed of the latent heat storage material 20.

[Sixth Embodiment]
Next, a heat storage container according to a sixth embodiment of the present invention will be described with reference to FIGS. FIG. 10 shows a schematic configuration of the heat storage container 201 according to the present embodiment. FIG. 11 shows a schematic cross-sectional configuration of the heat storage container 201 according to the present embodiment cut along a vertical plane. FIG. 12 shows a schematic cross-sectional configuration of the door member 110 of the heat storage container 201 according to the present embodiment. In addition, about the component which has the same function and effect | action as the heat storage member 1 by 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The heat storage container 201 according to the present embodiment is used as a cooler box that cools the contents. As shown in FIG. 10, the heat storage container 201 according to the present embodiment is attached to a rectangular parallelepiped box 100 whose upper surface is opened and rotatably attached to one side of the opening end of the box 100 via a hinge mechanism. The door member 110 is capable of opening and closing the opening of the box body 100.

As shown in FIG. 11, a cassette-type heat storage member 130 is detachably attached to the bottom surface portion 101 and the four side surface portions 102 to 105 of the box 100 (only the

side surface portions

103 and 105 are shown in FIG. 11). Insertion holes 120 to be inserted are respectively formed. 12, the door member 110 is similarly formed with an insertion hole 120 into which the cassette-type heat storage member 130 is detachably inserted. The thick arrows in FIGS. 11 and 12 show examples of the attachment / detachment direction of the heat storage member 130. The heat storage member 130 has substantially the same configuration as the heat storage member 1 of the first embodiment. The heat storage member 130 is attached so that the latent heat storage material 10 is on the inner side (accommodating space side) and the elastic member 60 is on the outer side. In this example, the heat storage member 130 is attached to all six surfaces surrounding the storage space in which the stored items are stored, but the heat storage member 130 is not necessarily attached to all six surfaces. Since the cold air flows downward, it is preferable to attach the heat storage member 130 to at least the door member 110 serving as the ceiling surface of the accommodation space.

In the present embodiment, the heat storage member 130 is detachably attached to the heat storage container 201, but the heat storage member 130 is always attached to the heat storage container 201 as long as the heat storage container 201 itself can be cooled in a cool box or the like. It may be done. In addition, the heat storage container 201 may include a cooling mechanism that cools the inside of the accommodation space and a power source that drives the cooling mechanism.

In the present embodiment, the cassette-type heat storage member 130 is cooled in advance in a cool box or the like and attached to the heat storage container 201 at the time of use. According to the present embodiment, as in the first embodiment, while suppressing deformation of the container of the heat storage member 130, the heat storage and heat dissipation characteristics of the latent heat storage material 10 (particularly from the latent heat storage material 10 into the housing space). Heat dissipation characteristics).

FIG. 13 shows a schematic configuration of a heat storage container 202 according to a modification of the present embodiment. As shown in FIG. 13, the door member 110 may be a sliding door that slides parallel to the open end of the box body 100.

[Seventh Embodiment]
Next, a heat storage container according to a seventh embodiment of the present invention will be described with reference to FIGS. FIG. 14 shows a schematic configuration of the heat storage container 203 according to the present embodiment. FIG. 15 shows a schematic cross-sectional configuration in which the heat storage container 203 according to the present embodiment is cut along a vertical plane. In addition, about the component which has the same function and effect | action as the heat storage member 1 by 1st Embodiment, the heat storage member 5 by 3rd Embodiment, or the heat storage container 201 by 6th Embodiment, it is the same. Reference numerals are assigned and explanations thereof are omitted.

As shown in FIGS. 14 and 15, the heat storage container 203 has two

housing spaces

140 and 141. The housing space 140 and the housing space 141 are partitioned by a partition plate 106. The interiors of the

housing spaces

140 and 141 can be kept cool in different cool temperature ranges.

A cassette-type heat storage member provided with the latent heat storage material 10 is provided on almost the entire side surface portion 105 of the box 100 and on the

side surface portions

102 and 104, the bottom surface portion 101, and the door member 110 facing the housing space 140. Insertion holes 120 into which 130 is detachably inserted are formed (FIG. 15 shows only the insertion hole 120 in the side surface portion 105 and the insertion hole 120 in the bottom surface portion 101). In addition, the cassette 100 having the latent heat storage material 20 is formed on almost the entire side surface portion 103 of the box body 100 and on the

side surface portions

102 and 104, the bottom surface portion 101, and the portion of the door member 110 facing the accommodation space 141. Insertion holes 121 into which the heat storage member 131 is detachably inserted are formed (in FIG. 15, only the insertion hole 121 of the side surface portion 103 and the insertion hole 121 of the bottom surface portion 101 are shown). The partition plate 106 is formed with an insertion hole 122 into which a cassette type heat storage member 132 including the latent

heat storage materials

10 and 20 is detachably inserted.

The heat storage member 130 has substantially the same configuration as the heat storage member 1 of the first embodiment. The heat storage member 130 is attached so that the latent heat storage material 10 is on the inner side (accommodating space 140 side) and the elastic member 60 is on the outer side. The heat storage member 131 has substantially the same configuration as the heat storage member 1 of the first embodiment except that the heat storage member 131 includes the latent heat storage material 20 having a phase change temperature different from that of the latent heat storage material 10. The heat storage member 131 is attached so that the latent heat storage material 20 is on the inner side (the accommodation space 141 side) and the elastic member 60 is on the outer side. The heat storage member 132 has substantially the same configuration as the heat storage member 5 of the third embodiment. The heat storage member 132 is attached so that the latent heat storage material 10 is on the accommodation space 140 side and the latent heat storage material 20 is on the accommodation space 141 side. In this example, the phase change temperature of the latent heat storage material 10 is about 6 ° C., and the phase change temperature of the latent heat storage material 20 is about 9 ° C.

According to the present embodiment, as in the first and third embodiments, the heat storage and heat dissipation characteristics of the latent heat storage materials 10 and 20 (particularly the latent heat storage material 10 are suppressed while suppressing deformation of the container of the heat storage member 130. The heat radiation characteristics from the heat storage material 140 to the housing space 140 and the heat radiation characteristics from the latent heat storage material 20 to the housing space 141 can be improved. In addition, according to the present embodiment, the latent

heat storage materials

10 and 20 having different phase change temperatures can be arranged so as to surround each of the

accommodation spaces

140 and 141. Can be kept cool.

[Eighth Embodiment]
FIG. 16 shows a schematic cross-sectional configuration of a direct cooling refrigerator (cold storage) as the heat storage container 204 according to the present embodiment. In addition, about the component which has the same function and effect | action as the heat storage member 1 by 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. The heat storage container 204 includes a heat storage container main body 160 having a rectangular parallelepiped shape that is vertically high in the installed state. In the front of the heat storage container main body 160, rectangular openings are provided in the upper and lower stages, respectively. A hollow box-shaped refrigeration chamber 172 is provided in the heat storage container main body 160 with the lower rectangular opening as an opening end. A hollow box-shaped freezer compartment 174 is provided in the heat storage container main body 160 with the upper rectangular opening as an opening end.

A freezer compartment door 176 made of, for example, resin is attached to the open end of the freezer compartment 174 via a hinge mechanism (not shown) so as to be opened and closed. In FIG. 16, the freezer compartment door 176 shows a closed state. The freezer compartment door 176 has a rectangular flat plate shape having a region that closes the rectangular opening of the freezer compartment 174 in a closed state.

A door member 162 is attached to the open ends of the refrigerator compartment 172 and the freezer compartment 174 through a hinge mechanism (not shown) so as to be opened and closed. The door member 162 has a rectangular flat plate shape having a region that closes the rectangular openings of both the refrigerator compartment 172 and the freezer compartment 174 in a closed state. Further, on the opposite side of the door member 162 to the outer periphery including both the refrigerator compartment 172 and the freezer compartment 174, there is a door packing 164 for ensuring the tightness of the refrigerator compartment 172 and the freezer compartment 174 when the door is closed. Has been placed. Each of the heat storage container main body 160 and the door member 162 has a layer configuration in which a heat insulating material is filled between the outer wall and the inner wall.

The heat storage container 204 has a vapor compression refrigeration cycle as a cooling mechanism for cooling the refrigerator compartment 172 and the freezer compartment 174. The refrigeration cycle includes a compressor 170 that compresses the refrigerant, a condenser (not shown) that condenses the compressed refrigerant and dissipates heat to the outside, and an expansion unit (not shown) that expands the condensed refrigerant (for example, Capillary tube), an evaporator (cooler) 166 that evaporates the expanded refrigerant and cools the inside by vaporization heat, and a pipe 168 that connects them. The compressor 170 is disposed on the bottom surface of the heat storage container main body 160. The evaporator 166 is provided on the bottom surface of the freezer compartment 174 inside the heat storage container main body 160. As the cooling mechanism, an absorption cooling device or an electronic cooling device using the Peltier effect can be used. The freezer compartment 174 and the refrigerator compartment 172 communicate with each other through a cold air passage (not shown).

In the present embodiment, a heat storage member having a layer configuration similar to that of the heat storage member 1 of the first embodiment is provided on the inner side of the inner wall surface of the refrigerator compartment 172 and the inner wall surface of the door member 162, for example. Yes. Specifically, a plate-like substrate 150 is provided on the inner side of the inner wall surface (bottom surface and side surfaces in three directions) of the refrigerator compartment 172 with a predetermined gap. A layered internal space (for example, a sealed space) is formed between the inner wall surface of the refrigerating chamber 172 facing each other (the inner wall surface of the heat storage container body 160) and the inner wall surface of the substrate 150. In the internal space, the latent heat storage material 10 and the elastic member 60 are stacked and filled with each other. The latent heat storage material 10 and the elastic member 60 are arranged so that the latent heat storage material 10 is on the inner side (the refrigerator compartment 172 side) and the elastic member 60 is on the outer side (the heat storage container main body 160 side).

Similarly, a plate-like base material 152 is provided inside the inner wall surface of the door member 162 via a predetermined gap. A layered internal space (for example, a sealed space) is formed between the inner wall surface of the door member 162 and the inner wall surface of the base material 152 facing each other. In the internal space, the latent heat storage material 10 and the elastic member 60 are stacked and filled with each other. The latent heat storage material 10 and the elastic member 60 are arranged so that the latent heat storage material 10 is on the inner side (the refrigerator compartment 172 side) and the elastic member 60 is on the outer side (the door member 162 side).

According to the present embodiment, similar to the first embodiment, the heat storage / heat dissipation characteristic of the latent heat storage material 10 (particularly, the heat dissipation characteristic from the latent heat storage material 10 to the refrigerator compartment 172) can be improved.

Next, further effects produced by using the heat storage members 1 to 8 according to the above embodiment will be described. In general, a phase change of a substance causes a supercooling phenomenon that does not change from a liquid phase to a solid phase unless the temperature is lower than the melting point. For example, an aqueous latent heat storage material having a melting point of about 0 ° C. to 6 ° C. has a temperature range in which the state of supercooled water is maintained without changing to a solid phase even when cooled to below the melting point. For this reason, for example, when a water-based latent heat storage material having a melting point of 6 ° C. undergoes phase change from a liquid phase to a solid phase at −2 ° C. due to supercooling, it is placed in a refrigerator whose internal temperature is set to 2 ° C. Even if the latent heat storage material is arranged, it does not function as a heat insulating material using latent heat. Therefore, the supercooling phenomenon is an important problem to be considered when using the latent heat storage material as a heat insulating material.

By the way, as an example of food preserving technology using the supercooling phenomenon, there is a supercooling stabilization of eggs ("Introduction to Ice Temperature Food", Akihiko Yamane, published by Nihon Shokuhin Shimbun, 2011). Cracked eggs that have been cracked and removed only the contents are frozen at -0.5 ° C when cooled, but eggs with shells that do not break the shell are frozen at -12 to -13 ° C even when cooled. do not do. This utilizes the fact that the internal pressure in the shell rises due to the volume expansion when the contents of the shell changes during cooling of the eggs, and the temperature range of supercooling widens (lowers).

Therefore, for example, in the case of a heat storage member in which a water-based latent heat storage material is accommodated in a container, the container due to volume expansion at the time of phase change of the latent heat storage material in the container when the heat storage member is cooled, as in the case of the above-described eggs. Due to the increase in internal pressure, the temperature range of supercooling widens to the low temperature side (the degree of supercooling increases), which causes a problem that the liquid phase does not change to the solid phase at the desired phase change temperature.

FIG. 17 shows an example of a conventional heat storage member. FIG. 17A shows a cross-sectional configuration of a conventional heat storage member 80. The heat storage member 80 includes an aqueous latent heat storage material 84 and a container 82 that houses the latent heat storage material 84. The container 82 is provided with a space 86 so as to have a volume that allows for the volume expansion during the phase change of the latent heat storage material 84. However, since the latent heat storage material 84 is thickened or gelled, shear stress acts more during volume expansion than in the liquid state and cannot sufficiently expand in the direction of the space 86, and the contact surface direction with the container 82 Also, a force acts to expand and deform the container 82 in the thickness direction. Thereby, the internal pressure of the container 82 rises and the temperature range of the supercooling of the latent heat storage material 84 becomes low.

The breaking strength of the eggshell is 3 to 4 kg / cm ² = 2.9 to 3.9 × 10 ⁵ Pa. The strength of the egg shell was used as an index to set the inner pressure upper limit value of the container 82, and the pressure applied to the container 82 at the time of the phase change of the heat storage material was estimated by performing deflection calculation used in building engineering. The container 82 was assumed to be a blow molded container. FIG. 17B shows a cross section of the container 82. The inner dimension d1 of the container 82 in the thickness direction was set to three types: d1 = 5 mm, 10 mm, and 15 mm. FIG. 17C is a plan view of the container 82. The container 82 has a rectangular planar shape in which the length of the vertical side is 2b, the length of the horizontal side is 2a, and a / b = 1.5.

FIG. 17D illustrates a state in which the volume expansion of 5% in the vertical direction of the thickness occurs, that is, 10% in the thickness direction, with the container 82 filled with water as the latent heat storage material 82. ing. In the deflection calculation, the internal pressure increase value was calculated as a rectangular plate supported around the container 82 and receiving an equal load, and the deflection amount was calculated by approximation of a triangular area.

FIG. 18 is a graph showing calculation results. The vertical axis represents the uniform stress [Pa], and the horizontal axis represents the long side length (2a) [mm]. The curve indicated by (a) in the figure indicates the case where the inner dimension d1 of the container 82 in the thickness direction (that is, the thickness of the latent heat storage material 84 during the liquid phase) is 5 mm, and the curve indicated by (b) in the figure. Indicates the case of d1 = 10 mm, and the curve indicated by (c) in the figure shows the case of d1 = 15 mm. A broken straight line indicated by (d) in the figure indicates a position where the uniform stress value is 3.0 × 10 ⁵ Pa as an example of the internal pressure upper limit value of the container 82. As shown in FIG. 18, when the inner dimension d1 in the thickness direction of the container 82 is 5 mm, the long side length 2a is about 150 mm or less, and when the inner dimension d1 is 10 mm, the long side length 2a is about 170 mm. Hereinafter, it can be seen that when the internal dimension d1 is 15 mm, the internal pressure upper limit value (straight line (d) in the figure) of the container 82 is exceeded when the length 2a of the long side is about 190 mm or less.

If the upper limit of the internal pressure of the container 82 is exceeded in the conventional heat storage member 80 as exemplified above, the temperature range of the supercooling of the latent heat storage material 84 is lowered. In order to prevent this, it is necessary to use the heat storage members 1 to 8 according to the above embodiment. For example, since the Young's modulus of rubber sponge is 10 kPa and the Young's modulus of foamed polymer is 1 MPa, these materials are placed in the heat storage container 82 to increase the internal pressure due to volume expansion at the time of phase change of the latent heat storage material 84. It can suppress and it can prevent the temperature range of supercooling falling. As described above, according to the heat storage members 1 to 8 of the above embodiment, it is possible to suppress the increase in the degree of supercooling by suppressing the increase in the internal pressure of the container due to the volume change at the phase change of the latent heat storage material.

The present invention is not limited to the above embodiment, and various modifications can be made.
For example, in the said embodiment, although the heat storage member which stores cold heat was mentioned as an example, this invention is applicable not only to this but the heat storage member which stores warm heat. Moreover, in the said 6th and 7th embodiment, although the cooler box which cools a stored thing was mentioned as an example, it is applicable also to the heater box which keeps a stored thing. Moreover, although the refrigerator was mentioned as an example in the said 8th Embodiment, it is applicable also to a warm storage.

Moreover, in the said embodiment, although the heat storage member provided in the inner wall surface in the store | warehouse | chamber of a cool box or a cooler box, and the heat storage member used as a building material were mentioned as an example, this invention is not limited to this, The vehicle interior of a motor vehicle It can also be applied to heat storage members used for wall materials, floor materials and the like.

Moreover, in the said embodiment, although the flat heat storage member was mentioned as an example as a whole, this invention is not restricted to this, It can apply also to curved-surface plate-shaped heat storage members, such as L-shaped section and C-shaped section. .

In the above embodiment, paraffin is taken as an example of the latent heat storage material whose volume is contracted by the phase change from the liquid phase to the solid phase, but other materials can also be used. Moreover, although sodium sulfate aqueous solution was mentioned as an example as a latent heat storage material whose volume expands by the phase change from a liquid phase to a solid phase, other materials (for example, other salt aqueous solutions, water, etc.) can also be used. .

Further, in the above embodiment, a sealed heat storage member whose inner space is hermetically sealed has been described as an example. However, the present invention is not limited to this, and an open heat storage member that allows air to flow in and out of the container. It can also be applied to members.

Further, the above embodiments and modifications can be implemented in combination with each other.

Next, a heat storage member using a latent heat storage material, a heat storage container including the heat storage member, and a building material will be described using a ninth embodiment to a fourteenth embodiment.

Conventionally, a heat storage member using a latent heat storage material that reversibly changes between a solid phase and a liquid phase is known. The heat storage member is provided in a cool box equipped with a cooler. When the temperature decreases, the heat storage member changes phase from the liquid phase to the solid phase to store cold heat, and when the temperature rises, the heat storage member changes phase from the solid phase to the liquid phase to radiate the cold heat.

FIG. 35A shows an example of the arrangement of the heat storage member 1500 and a cooler 1520 as a heat source for supplying cold heat to the heat storage member 1500. As shown to Fig.35 (a), the flat heat storage member 1500 is standingly arranged along inner wall surfaces, such as a cool box. The cooler 1520 is disposed so as to be biased upward with respect to the heat storage member 1500. That is, the heat storage member 1500 is provided with a heat transfer surface 1501 in contact with the cooler 1520 at the upper part of the left surface in the drawing. The heat storage member 1500 undergoes a phase change from the liquid phase to the solid phase by the cold supplied from the cooler 1520 via the heat transfer surface 1501, and stores the heat of fusion. Moreover, the heat storage member 1500 is provided with a heat radiating surface 1502 on the right side in the drawing for radiating the stored cold heat into the cool box. The heat storage member 1500 radiates cold heat from a heat radiating surface 1502 having a relatively large area in order to keep the inside of the cool box uniformly cold.

However, since the heat storage member 1500 generally has a uniform thermal conductivity, the time until the phase change is completed is different between a portion near and far from the heat transfer surface 1501. For example, in the state shown in FIG. 35B, the phase change from the liquid phase L to the solid phase S is completed at the upper part of the heat storage member 1500 that is close to the heat transfer surface 1501, but from the heat transfer surface 1501. In the lower part of the heat storage member 1500 having a long distance, the phase is changing or in the liquid phase L. For this reason, the heat radiation amount per unit time from the lower part of the heat radiation surface 1502 is smaller than the heat radiation amount per unit time from the upper part. Here, the white thick arrow in the figure indicates the heat radiation from the heat radiating surface 1502, and the length of the white thick arrow indicates the amount of heat radiation per unit time. As described above, when the cooler 1520 is arranged to be biased with respect to the heat storage member 1500, the heat dissipation per unit time from the heat radiating surface 1502 is likely to be uneven, and as a result, temperature unevenness occurs in the cool box. There is a problem that it becomes easy.

An object of the embodiment described below is to provide a heat storage member that can reduce unevenness in the amount of heat release, a heat storage container including the heat storage member, and a building material.

The object is to provide a gel-like latent heat storage material that reversibly changes between a solid phase and a liquid phase, and a plurality of materials that have a higher thermal conductivity than the latent heat storage material and are dispersed in the latent heat storage material. A heat conductive filler, a first region having a heat transfer surface for transmitting heat from a heat source, provided in a part of the latent heat storage material, and provided in another part of the latent heat storage material, This is achieved by a heat storage member characterized by having a second region having a higher dispersion density of the conductive filler than the first region.

In the heat storage member of the present embodiment, the second region is characterized in that the distance from the heat transfer surface is farther than the first region.

In the heat storage member of the present embodiment, the dispersion density of the heat conductive filler in the latent heat storage material increases as the distance from the heat transfer surface increases.

In the heat storage member of the present embodiment, the latent heat storage material is provided in contact with the first latent heat storage material in which the heat conductive filler is dispersed at a predetermined dispersion density, and the first latent heat storage material. A second latent heat storage material having a dispersion density of the heat conductive filler lower than the predetermined dispersion density, and the abundance ratio of the first latent heat storage material in the latent heat storage material in the second region is It is higher than the abundance ratio of the first latent heat storage material in the latent heat storage material in one region.

In the heat storage member of the present embodiment, the ratio of the first latent heat storage material in the latent heat storage material increases as the distance from the heat transfer surface increases.

The heat storage member of the present embodiment is characterized in that the heat transfer surface is provided on the first latent heat storage material.

In the heat storage member of the present embodiment, the heat transfer surface is in contact with the heat source.

In the heat storage member of the present embodiment, the heat transfer surface is characterized in that heat from the heat source is transmitted via cold air or hot air.

In the heat storage member of the present embodiment, the heat source is a cooler or a heater.

In the heat storage member of the present embodiment, the latent heat storage material includes an aqueous solution of paraffin, water, or salt.

In the heat storage member of the present embodiment, the thermal conductivity of the thermal conductive filler is 10 to 500 W / (m · K).

In the heat storage member of the present embodiment, the size of the heat conductive filler is 1 μm to 1 mm.

Further, the object is to have a storage room for storing stored items, a heat source for keeping the storage room at a predetermined temperature, and a heat storage member disposed in the storage room, and the heat storage member is This is achieved by a heat storage container characterized in that a heat storage member of the form is used.

Further, the above object is achieved by a building material characterized in that the heat storage member of the present embodiment is used.

According to this embodiment, it is possible to realize a heat storage member that can reduce unevenness in the amount of heat release, a heat storage container including the heat storage member, and a building material.

Hereinafter, the ninth embodiment to the fourteenth embodiment will be specifically described.

[Ninth Embodiment]
A heat storage member according to a ninth embodiment of the present invention will be described with reference to FIGS. In all the following drawings, the dimensions and ratios of the respective constituent elements are appropriately varied for easy understanding. FIGS. 19A and 19B show a schematic cross-sectional configuration of the heat storage member 301 according to the present embodiment. Here, FIG. 19A shows a state in which the latent

heat storage materials

321 and 322 described later are both in the liquid phase (L), and FIG. 19B shows that the latent

heat storage materials

321 and 322 are both in the solid phase (S). ). As shown in FIGS. 19A and 19B, the heat storage member 1 has a rectangular flat plate shape with a thickness of about 20 mm as a whole. For example, the heat storage member 301 is arranged upright along the inner wall surface (side surface) of a direct-cooling type cool box (a refrigerator, a freezer, etc.) that cools the contents. 19 (a) and 19 (b), the left side represents the inner wall surface side of the cool box (hereinafter, simply referred to as “inner wall surface side”), and the right side represents the inner side of the cool box (hereinafter, simply “ It may be referred to as “inside the warehouse”).

On the inner wall surface side of the heat storage member 301, a cooler 350 of a cool box is provided as a heat source for supplying cold heat to the heat storage member 301. The cooler 350 of the present embodiment is an evaporator that constitutes a vapor compression refrigeration cycle together with a compressor, a condenser, and an expansion unit (not shown). The cooler 350 is in contact with an upwardly biased portion (for example, the upper end portion) of the surface on the inner wall surface side of the heat storage member 301. The cooler 350 of this example has the same width as the heat storage member 301 in the depth direction in the figure.

The heat storage member 301 includes a heat transfer surface 311 to which cold heat is transmitted from the cooler 350 at the upper part of the surface on the inner wall surface side. In this example, the heat transfer surface 311 is in contact with the cooler 350. Cold heat supplied from the cooler 350 via the heat transfer surface 311 is stored in the heat storage member 301. Moreover, the heat storage member 301 is provided with a heat radiating surface 312 that dissipates the stored cold heat in the cool box over almost the entire inner surface. The heat radiation surface 312 of the heat storage member 301 has a larger area than the heat transfer surface 311 or the heat radiation surface of the cooler 350, for example.

The heat storage member 301 is normally used in a predetermined operating temperature range and operating pressure range. For example, the heat storage member 301 stores the cold heat transmitted from the cooler 350 via the heat transfer surface 311, and releases the cold heat from the heat radiating surface 312 when the temperature in the cold storage chamber rises due to a power failure, door opening, or the like. Keep the inside cool. In this case, the temperature range from the surface temperature of the cooler 350 during operation to the ambient temperature (for example, room temperature) at the cold storage installation location is included in the operating temperature range of the heat storage member 301. Moreover, the operating pressure of the heat storage member 301 is, for example, atmospheric pressure.

The heat storage member 301 includes a first latent heat storage material 321 and a second latent heat storage material 322, and a sealing film 323 that covers the outside thereof. Each of the latent

heat storage materials

321 and 322 has substantially the same wedge shape with a right triangular cross section. The latent

heat storage materials

321 and 322 are combined such that the front ends of the respective wedges face in opposite directions, and the inclined surfaces (surfaces corresponding to the oblique sides of the right triangle) are in surface contact with each other. The tip of the wedge of the latent heat storage material 321 is upward, and the tip of the wedge of the latent heat storage material 322 is downward. The combined latent

heat storage materials

321 and 322 have a rectangular flat plate shape (cuboid shape) as a whole. The latent

heat storage materials

321 and 322 of this example are formed using the same material except that the dispersion densities of heat conductive fillers described later are different from each other.

The latent

heat storage materials

321 and 322 have a phase change temperature (melting point) at which the phase change between the solid phase and the liquid phase occurs reversibly within the operating temperature range of the heat storage member 1. In this example, the latent

heat storage materials

321 and 322 have the same phase change temperature. The latent

heat storage materials

321 and 322 are in the liquid phase (L) as shown in FIG. 19A at a temperature higher than the phase change temperature, and are solid as shown in FIG. 19B at a temperature lower than the phase change temperature. It becomes phase (S). The phase change temperatures of the latent

heat storage materials

321 and 322 can be measured using a differential scanning calorimeter (DSC), a thermocouple, or the like.

The latent

heat storage materials

321 and 322 of this embodiment contain paraffin. Paraffin is a generic name for saturated chain hydrocarbons represented by the general formula C _n H _{2n + 2} . The melting point of paraffin varies depending on the number of carbons n. In the present embodiment, for example, n-tetradecane (molecular formula: C ₁₄ H ₃₀ ) is used as the latent

heat storage materials

321 and 322. The melting point (5.9 ° C.) of n-tetradecane is included in the operating temperature range of the heat storage member 1.

Also, the latent

heat storage materials

321 and 322 contain a gelling agent that gels paraffin. A gel refers to a gel that has a three-dimensional network structure formed by cross-linking molecules, and has absorbed and swelled a solvent therein. A gel is chemically stable without melting unless it breaks the structure. The gelling agent produces a gelling effect only when it is contained in an amount of several percent by weight relative to paraffin. The gel-like latent

heat storage materials

321 and 322 maintain a solid state as a whole even when the phase changes between the solid phase and the liquid phase, and do not have fluidity even in the liquid phase state. Accordingly, since the latent

heat storage materials

321 and 322 themselves maintain a stable shape in both the solid phase and the liquid phase, the heat storage member 301 can be easily handled. Moreover, it becomes easy to maintain the shapes of the latent

heat storage materials

321 and 322 regardless of the relationship between the arrangement posture of the heat storage member 301 and the vertical direction. In the gelled latent

heat storage materials

321, 322, the gelling agent becomes a polymer (polymer) having a molecular weight (for example, a molecular weight of 10,000 or more) larger than the molecular weight of at least paraffin.

As the latent

heat storage materials

321 and 322, other materials having a phase change temperature within the operating temperature range of the heat storage member 301 (for example, water, an aqueous solution of salt, etc.) can also be used. Moreover, you may add a flame retardant, a supercooling prevention agent, etc. to the latent heat storage material 321,322 as needed.

In the latent heat storage material 321, a large number of granular heat conductive fillers (not shown) having a higher thermal conductivity than the latent heat storage material 321 itself are dispersed almost uniformly at a predetermined dispersion density. The heat conductive filler is formed of metal, ceramic or the like and has a heat conductivity of about 10 to 500 W / (m · K). The size of the heat conductive filler (for example, the diameter if the heat conductive filler is spherical) is about 1 μm to 1 mm. The heat conductive filler of this example is made of aluminum nitride (AlN) and has a heat conductivity of 200 to 300 W / (m · K).

On the other hand, the heat conductive filler is not dispersed in the latent heat storage material 322. In other words, the dispersion density of the heat conduction filler in the latent heat storage material 322 is 0, which is lower than the dispersion density of the heat conduction filler in the latent heat storage material 321.

In this embodiment, the heat transfer surface 311 is provided on the latent heat storage material 321, and the heat radiation surface 312 is provided on the latent heat storage material 322. That is, the heat transfer surface 311 is formed on the surface of the heat storage member 301 on the latent heat storage material 321 side, and the heat dissipation surface 312 is formed on the surface of the heat storage member 301 on the latent heat storage material 322 side.

In the heat storage member 301, the ratio (existence ratio) of the latent

heat storage materials

321 and 322 occupying the latent heat storage material (latent heat storage materials 321 and 322) varies depending on the vertical position of the heat storage member 301. In the present embodiment, the existence ratio of the latent heat storage material 321 is lower as the upper part of the heat storage member 301 is higher as it is lower. The abundance ratio of the latent heat storage material 322 is higher at the upper part of the heat storage member 301 and lower at the lower part. Since the heat transfer surface 311 is provided on the upper part of the heat storage member 301, the existence ratio of the latent heat storage material 321 is relatively low in a region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 301 is short. As the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 301 increases, the distance increases monotonously. The abundance ratio of the latent heat storage material 322 is relatively high in a region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 301 is short, and from the heat transfer surface 311 in the in-plane direction of the heat storage member 301. The distance decreases monotonically as the distance increases. Region (first region) A1 including the heat transfer surface 311 and the surface opposite to the heat transfer surface 311 in the heat storage member 301, and the same shape as the first region A1, heat in the in-plane direction of the heat storage member 301 When the distance from the transmission surface 311 is compared with the area (second area) A2 farther than the first area A1, the abundance ratio of the latent heat storage material 321 in the first area A1 is the latent heat storage material in the second area A2. It is lower than the abundance ratio of 321. In addition, the existing ratio of the latent heat storage material 322 in the first region A1 is higher than the existing ratio of the latent heat storage material 322 in the second region A2.

Considering that the heat conduction filler is dispersed in the latent heat storage material 321 and the heat conduction filler is not dispersed in the latent heat storage material 322, the heat conduction filler of the latent heat storage material (latent heat storage materials 321 and 322) is used. The dispersion density varies depending on the position of the heat storage member 301 in the vertical direction. In the present embodiment, the dispersion density of the heat conductive filler is lower at the upper part of the heat storage member 301 and higher at the lower part. Further, the dispersion density of the heat conductive filler is relatively low in a region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 301 is short, and from the heat transfer surface 311 in the in-plane direction of the heat storage member 301. The distance increases monotonously as the distance increases. Comparing the first region A1 and the second region A2, the dispersion density of the heat conductive filler in the first region A1 is lower than the dispersion density of the heat conductive filler in the second region A2.

Moreover, since the latent heat storage material 321 contains a heat conductive filler that does not function as a latent heat storage material, the latent heat amount per unit volume of the latent heat storage material 321 is smaller than that of the latent heat storage material 322. Considering this, the amount of latent heat per unit volume of the heat storage member 301 varies depending on the position of the heat storage member 301 in the vertical direction. In the present embodiment, the amount of latent heat per unit volume is larger at the upper part of the heat storage member 301 and smaller at the lower part. In addition, the amount of latent heat per unit volume of the heat storage member 301 is relatively large in a region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 301 is short, and the heat in the in-plane direction of the heat storage member 301 is. As the distance from the transmission surface 311 increases, the distance decreases monotonously. Comparing the first region A1 and the second region A2, the amount of latent heat per unit volume in the first region A1 is larger than the amount of latent heat per unit volume in the second region A2.

The sealing film 323 covering the outside of the latent

heat storage materials

321 and 322 has a relatively high gas barrier property. Thereby, even if the latent

heat storage materials

321 and 322 have volatility, it is possible to prevent deterioration over time. The sealing film 323 is formed using a material having a relatively high thermal conductivity such as aluminum-deposited polyethylene terephthalate. In order to prevent deformation of the latent

heat storage materials

321 and 322 due to repeated phase change, the sealing film 323 is preferably expandable and contractable following the volume change during the phase change of the latent

heat storage materials

321 and 322.

It is assumed that cold heat from the cooler 350 is transmitted to the heat transfer surface 311 in a state where the latent

heat storage materials

321 and 322 are both in a liquid phase (see FIG. 19A). The cold heat transmitted to the heat transfer surface 311 is in accordance with the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 301, the heat conductivity on the heat transfer path from the heat transfer surface 311, and the like. Heat is gradually transferred to each area. Moreover, in each area | region of the latent heat storage material 321,322, when temperature falls by transmission of cold and reaches phase change temperature, the phase change from a liquid phase to a solid phase will be started.

In the present embodiment, a region (for example, the second region A2) that is far from the heat transfer surface 311 in the in-plane direction of the heat storage member 301 has a relatively high thermal conductivity and a relatively large amount of latent heat. small. Therefore, in this region, the heat transfer from the heat transfer surface 311 can be made relatively fast, and the time required for the phase change from the liquid phase to the solid phase can be made relatively short. On the other hand, a region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 301 is short (for example, the first region A1) has a relatively low thermal conductivity and a relatively large amount of latent heat. Therefore, in this region, the heat transfer from the heat transfer surface 311 can be made relatively slow, and the time required for the phase change from the liquid phase to the solid phase can be made relatively long.

Thereby, it is possible to suppress variation in the time until the phase change from the liquid phase to the solid phase is completed between the regions of the heat storage member 301. Therefore, it is possible to shorten the time from the completion of the phase change first in a certain region of the latent

heat storage materials

321 and 322 to the completion of the phase change of the entire latent

heat storage materials

321 and 322. For this reason, even if the heat transfer surface 311 is at a position where the heat storage member 301 is biased, the entire heat radiation surface 312 can be cooled almost simultaneously, so that temperature unevenness inside the heat storage member 301 can be suppressed. Therefore, according to the present embodiment, it is possible to dissipate cold heat almost uniformly from the entire heat radiation surface 312 of the heat storage member 301 (see FIG. 19B), and to suppress temperature unevenness in the cool box. .

Further, in the present embodiment, the heat transfer surface 311 is provided on the latent heat storage material 321 having a relatively high heat conductivity by dispersing the heat conductive filler. The latent heat storage material 321 is provided over the entire surface of the heat storage member 301 on the heat transfer surface 311 side. For this reason, the cold transmitted from the cooler 350 to the heat transfer surface 311 can be quickly transmitted in the in-plane direction of the heat storage member 301.

As a method of improving the heat transfer performance in the in-plane direction of the heat storage member 301 and reducing the unevenness of the heat radiation amount from the heat radiation surface 312, the planar shape substantially the same as that of the heat storage member 301 is provided between the cooler 350 and the heat storage member 301. There is also a method of interposing a metal plate (for example, an aluminum plate) having a close contact. However, when such a metal plate is used, there is a problem that the weight of the cold storage increases. Moreover, the heat storage member 301 peeled from the metal plate by the volume change by the phase change of the heat storage member 301, and there existed a problem that the heat transfer between the cooler 350 and the heat storage member 301 will fall. In the present embodiment, since the heat transfer in the in-plane direction of the heat storage member 301 can be improved without using a metal plate, an increase in the weight of the cool box or between the cooler 350 and the heat storage member 301 is achieved. A decrease in heat transfer can be suppressed.

Next, an example of a method for manufacturing the heat storage member 301 according to the present embodiment will be described. First, the gel-like latent heat storage material 322 in which the heat conductive filler is not dispersed is heated to melt the latent heat storage material 322 and the gelling agent, thereby causing the latent heat storage material 322 to have fluidity. Next, the latent heat storage material 322 in which fluidity has occurred is poured into a rectangular shallow container 1400. In this example, the volume of the latent heat storage material 322 poured into the shallow container 1400 is about half the volume of the shallow container 1400. Next, as shown in FIG. 20A, the shallow container 1400 is inclined obliquely, and the latent heat storage material 322 is cooled and solidified in this state. As a result, a gel-like latent heat storage material 322 having a wedge shape is formed.

Next, the gel-like latent heat storage material 321 in which the heat conductive filler is dispersed is heated in another container to melt the latent heat storage material 321 and the gelling agent, thereby causing the latent heat storage material 321 to have fluidity. Next, as shown in FIG. 20 (b), the latent heat storage material 321 in which fluidity has occurred is poured into the shallow container 1400 that has been returned to a horizontal state. The volume of the latent heat storage material 321 flowing into the shallow container 1400 is approximately the same as the volume of the latent heat storage material 322 already solidified in the shallow container 1400. Thereafter, the latent heat storage material 321 is cooled and solidified. Thus, a rectangular flat plate-like latent heat storage material in which the wedge-shaped latent

heat storage materials

321 and 322 are combined is formed. Thereafter, a rectangular flat plate-like latent heat storage material is taken out from the shallow container 1400 and the outside is covered with a sealing film 323. The heat storage member 301 is produced by the above procedure.

Here, the formation order of the latent

heat storage materials

321 and 322 in the shallow container 1400 may be reverse to the above procedure. The latent

heat storage materials

321 and 322 may be solidified separately using the same mold, for example, and then combined with each other.

FIG. 21 shows an example of the configuration of the connection portion between the heat storage member 301 and the cooler 350 according to the present embodiment. As shown in FIG. 21, unevenness is formed on the surface of the cooler 350, and the heat transfer surface 311 of the heat storage member 301 (for example, the latent heat storage material 321) is complementary to the unevenness on the surface of the cooler 350. Unevenness is formed. It is desirable that the unevenness on the surface of the cooler 350 and the unevenness on the heat transfer surface 311 have a shape in which the convex portion on one surface is fitted into the concave portion on the other surface. According to this configuration, since the connection strength between the heat storage member 301 and the cooler 350 can be increased, even if a volume change due to the phase change of the latent heat storage material repeatedly occurs in the heat storage member 301, the heat storage member 301 and the cooler 350. Can be prevented from separating. Moreover, according to this structure, since the heat transfer area between the heat storage member 301 and the cooler 350 can be increased, the amount of heat transfer per unit time between the heat storage member 301 and the cooler 350 can be increased. Can do.

[Tenth embodiment]
Next, a heat storage member according to a tenth embodiment of the present invention will be described with reference to FIG. FIGS. 22A and 22B show a schematic cross-sectional configuration of the heat storage member 302 according to the present embodiment. FIG. 22A shows a state in which both of the latent

heat storage materials

321 and 322 are in a liquid phase (L), and FIG. 22B shows a state in which both of the latent

heat storage materials

321 and 322 are in a solid phase (S). Show. 22A and 22B, the left side represents the inner wall surface side, and the right side represents the inner side of the warehouse. In addition, about the component which has the same function and effect | action as the thermal storage member 301 by 9th Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. The heat storage member 302 is arranged upright along the inner wall surface of the fan-type cool box.

As shown in FIGS. 22A and 22B, the heat storage member 302 according to the present embodiment has a configuration similar to that of the heat storage member 301 according to the ninth embodiment. It differs from the heat storage member 301 in that the transmission surface 311 is provided in the vicinity of the cold air outlet 354 of the cold storage. From the cold air outlet 354, the cold air cooled by heat exchange in the cooler (in the figure, the direction of the cold air is indicated by a thick arrow) is blown out into the cool box. The heat transfer surface 311 of the heat storage member 302 is provided at a portion (for example, an upper portion of the inner wall surface) that is directly exposed to the cold air blown from the cold air outlet 354. Cold heat from the cooler is transmitted to the heat transfer surface 311 via cold air (forced convection air). The heat transfer surface 311 may be provided in contact with the cold air inlet 354.

FIG. 22C shows a modification of the heat storage member 302 according to the present embodiment. 22 (c), unlike FIGS. 22 (a) and 22 (b), the left side represents the inner side of the warehouse, and the right side represents the inner wall surface side. As shown in FIG. 22 (c), the heat storage member 302 of this modification has a heat transfer surface 311 on the inner surface of the cold air blown from the cold air outlet 354 directly. As described above, in the heat storage member 302 used in the fan-type cool box, the heat transfer surface 311 and the heat dissipation surface 312 may be provided on the same surface of the heat storage member 302.

According to the present embodiment, similarly to the ninth embodiment, since the cold heat can be radiated almost uniformly from the entire heat radiation surface 312 of the heat storage member 302, the temperature unevenness in the cool box is suppressed. Can do.

[Eleventh embodiment]
Next, a heat storage container according to the eleventh embodiment of the present invention will be described with reference to FIGS. FIG. 23 shows a schematic cross-sectional configuration of the heat storage container 303 according to the present embodiment cut along a vertical plane. FIG. 24 shows a schematic cross-sectional configuration of the heat storage container 303 taken along line AA in FIG. The heat storage container 303 of the present embodiment is a direct cooling type cool box. In addition, about the component which has the same function and effect | action as the thermal storage member 301 by 9th Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

23 and 24, the heat storage container 303 has a hollow rectangular parallelepiped heat storage container main body 1110 having an opening formed on one surface. Inside the heat storage container main body 1110, a refrigeration room (storage room) 1120 that is kept at a predetermined cold temperature is provided. A door member 1130 capable of opening and closing the opening of the refrigerator compartment 1120 is provided at the opening end of the heat storage container main body 1110. The door member 1130 is rotatably attached to the heat storage container main body 1110 via a hinge portion (not shown). Of the door member 1130, a portion facing the opening end of the heat storage container main body 1110 is provided with a door packing 1132 for ensuring the hermeticity of the refrigerator compartment 1120 when the door is closed. The door member 1130 comes into contact with the entire circumference of the open end of the refrigerator compartment 1120 via the door packing 1132.

The heat storage container main body 1110 has, for example, an outer wall formed of a thin metal plate, an inner wall formed of, for example, ABS resin, and a heat insulating material filled in a space between the outer wall and the inner wall. That is, the heat storage container main body 1110 has a layer structure including an outer wall, a heat insulating material, and an inner wall. As the heat insulating material, a fiber heat insulating material (for example, glass wool), a foamed resin heat insulating material (for example, polyurethane foam), or the like is used.

Similarly, the door member 1130 has an outer wall formed of, for example, a thin metal plate, an inner wall formed of, for example, ABS resin, and a heat insulating material filled in a space between the outer wall and the inner wall. That is, the door member 1130 has the same layer structure as the heat storage container main body 1110. In the state where the door member 1130 is closed, the refrigerator compartment 1120 surrounded by the heat insulating material becomes a heat insulating space thermally insulated from the outside.

Further, the heat storage container 303 has a vapor compression refrigeration cycle as a cooling mechanism for cooling the refrigerator compartment 1120. The refrigeration cycle includes a compressor 1140 that compresses the refrigerant, a condenser (not shown) that condenses the compressed refrigerant and dissipates heat to the outside, and an expansion unit (for example, a capillary tube) (not shown) that expands the condensed refrigerant. A cooler (evaporator) 1150 that evaporates the expanded refrigerant and cools the interior with heat of vaporization is annularly connected via a refrigerant pipe 1160. The compressor 1140 and the condenser are provided outside the heat insulation space, and the cooler 1150 is provided inside the heat insulation space. In the present embodiment, compressor 1140 is arranged at the bottom of heat storage container main body 1110. The cooler 1150 has an outer shape with a U-shaped cross section, and is formed in a groove-like recess formed continuously on each of the three side surfaces (left and right and back side surfaces) of the inner wall of the refrigerator compartment 1120. Is housed in.

Further, a heat storage member 1170 is provided in the refrigerator compartment 1120. Similarly to the heat storage member 301 of the ninth embodiment, the heat storage member 1170 is a combination of wedge-shaped latent

heat storage materials

321 and 322, the latent heat storage material 322 is located on the heat radiation surface 312 side, and the latent heat storage material 322 The abundance ratio is higher at the upper part. The heat storage member 1170 has a U-shaped cross section as a whole, and is arranged upright along substantially the entire area of three side surfaces (left and right and back side surfaces) of the inner wall of the refrigerator compartment 1120. All of the heat storage members 1170 may be integrally formed, or may be configured by combining a plurality of flat plate heat storage members. A heat transfer surface 311 through which cold heat is transmitted from the cooler 1150 is provided in contact with the cooler 1150 at the upper portion of the inner wall surface of the heat storage member 1170. Further, on the inner surface of the heat storage member 1170, a heat radiating surface 312 for radiating the stored cold heat into the refrigerator compartment 1120 is provided.

According to the present embodiment, since the cold heat can be radiated from the entire heat radiation surface 312 of the heat storage member 1170 almost uniformly, uneven temperature in the refrigerator compartment 1120 can be suppressed. In the present embodiment, since the amount of latent heat per volume is larger at the upper part of the heat storage member 1170, cold heat can be radiated from the upper part of the heat radiation surface 312 for a longer time. In general, since the upper part of the refrigerator compartment 1120 is likely to be hotter, the temperature unevenness in the refrigerator compartment 1120 can be suppressed for a long period of time by dissipating cold heat from the upper part of the heat radiating surface 312 for a long period of time.

[Twelfth embodiment]
Next, a heat storage container according to a twelfth embodiment of the present invention is described with reference to FIGS. FIG. 25 is a front view showing a schematic configuration of the heat storage container 304 according to the present embodiment. FIG. 26 is a schematic cross-sectional view of the heat storage container 304 taken along line BB in FIG. The heat storage container 304 of the present embodiment is a fan-type cool box. In addition, about the component which has the same function and effect | action as the thermal storage member 301 by 9th Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

25 and 26, the heat storage container 304 has a heat storage container main body 1210 having a vertically long rectangular parallelepiped shape with an opening formed on one surface. Inside the heat storage container main body 1210, as three storage chambers, a refrigerator compartment 1220 arranged in the upper stage, a freezer compartment 1230 arranged in the middle stage, and a vegetable room 1240 arranged in the lower stage are provided. The refrigerator compartment 1220 and the freezer compartment 1230 are partitioned by a partition wall 1250 formed using a heat insulating material. The freezer compartment 1230 and the vegetable compartment 1240 are partitioned by a partition wall 1251 formed using a heat insulating material.

In the refrigerator compartment 1220, a plurality of shelves 1221 on which stored items are placed are provided. The freezer compartment 1230 is divided into an upper freezer compartment 1231 and a lower freezer compartment 1232. The upper freezer compartment 1231 is provided with a freezer compartment tray 1233 slidable in the front-rear direction, and the lower freezer compartment 1232 is provided with a freezer compartment tray 1234 slidable in the front-rear direction. The vegetable compartment 1240 is provided with a vegetable compartment container 1260 that can slide in the front-rear direction.

The heat storage container main body 1210 includes, for example, an outer wall formed of a thin metal plate, an inner wall formed of, for example, ABS resin, and a heat insulating material filled in a space between the outer wall and the inner wall. That is, the heat storage container main body 1210 has a layer structure including an outer wall, a heat insulating material, and an inner wall. As the heat insulating material, a fiber heat insulating material (for example, glass wool), a foamed resin heat insulating material (for example, polyurethane foam), or the like is used.

A door member 1223 (not shown in FIG. 25) that can open and close the opening of the refrigerator compartment 1220 is provided at the opening end of the refrigerator compartment 1220. The door member 1223 is rotatably attached to the heat storage container main body 1210 via a hinge portion (not shown). The door member 1223 in the closed state comes into contact with the entire circumference of the open end of the refrigerator compartment 1220 via a packing (not shown). The door member 1223 has, for example, an outer wall formed of a thin metal plate, an inner wall formed of, for example, ABS resin, and a heat insulating material filled in a space between the outer wall and the inner wall. That is, the door member 1223 has the same layer structure as the heat storage container main body 1210. In the state where the door member 1223 is closed, the refrigerator compartment 1220 surrounded by the heat insulating material becomes a heat insulating space thermally insulated from the outside.

At the opening end of the freezer compartment 1230, a door member 1235 (not shown in FIG. 25) capable of opening and closing the opening of the upper freezer compartment 1231 and a door member 1236 capable of opening and closing the opening of the lower freezer compartment 1232 (FIG. 25). (Not shown). Each of the

door members

1235 and 1236 has a structure that can slide in the front-rear direction. The freezer compartment tray 1233 in the upper freezer compartment 1231 is fixed to the door member 1235, and the freezer compartment tray 1234 in the lower freezer compartment 1232 is fixed to the door member 1236. The

freezer compartment trays

1233 and 1234 can be pulled out by pulling the

door members

1235 and 1236 forward. The

door members

1235 and 1236 in the closed state are in contact with the open end of the freezer compartment 1230 through packing (not shown). Similarly to the heat storage container main body 1210, the

door members

1235 and 1236 have a layer structure including an outer wall, an inner wall, and a heat insulating material. When the

door members

1235 and 1236 are closed, the freezer compartment 1230 surrounded by the heat insulating material becomes a heat insulating space thermally insulated from the outside.

A door member 1241 (not shown in FIG. 25) capable of opening and closing the opening of the vegetable compartment 1240 is provided at the opening end of the vegetable compartment 1240. The door member 1241 has a structure that can slide in the front-rear direction. The vegetable compartment container 1260 in the vegetable compartment 1240 is fixed to the door member 1241. The vegetable compartment container 1260 can be pulled out by pulling the door member 1241 forward. The door member 1241 in the closed state comes into contact with the open end of the vegetable compartment 1240 via a packing (not shown). Similarly to the heat storage container main body 1210, the door member 1241 has a layer structure including an outer wall, an inner wall, and a heat insulating material. In a state in which the door member 1241 is closed, the vegetable compartment 1240 surrounded by the heat insulating material becomes a heat insulating space thermally insulated from the outside.

The heat storage container 304 has a vapor compression refrigeration cycle as a cooling mechanism for cooling the refrigerator compartment 1220, the freezer compartment 1230, and the vegetable compartment 1240. The refrigeration cycle includes a compressor 1270 that compresses the refrigerant, a condenser (not shown) that condenses the compressed refrigerant and dissipates heat to the outside, and an expansion unit (for example, a capillary tube) (not shown) that expands the condensed refrigerant. A cooler (evaporator) 1280 that evaporates the expanded refrigerant and cools the interior with the heat of vaporization is connected in a ring shape via a refrigerant pipe. The cooler 1280 is disposed in a cool air passage (not shown) through which cool air blown to the refrigerator compartment 1220 and the freezer compartment 1230 flows. The refrigerator compartment 1220 and the freezer compartment 1230 are kept cold by blowing cold air cooled by heat exchange in the cooler 1280 from a predetermined cold air outlet. Further, the refrigerator compartment 1220 and the vegetable compartment 1240 are connected via a cold air passage (not shown) that guides the cold air in the refrigerator compartment 1220 to the vegetable compartment 1240. The vegetable room 1240 is indirectly cooled using the cold air in the refrigerator compartment 1220.

In the refrigerator compartment 1220,

heat storage members

1290a, 1290b, and 1290c are provided. FIG. 27 is a view of the refrigerator compartment 1220 of the heat storage container 304 as viewed from above, and shows the arrangement of the

heat storage members

1290a, 1290b, and 1290c and the direction of the cold air blown out from the cold air outlet. Each of the

heat storage members

1290a, 1290b, and 1290c has a rectangular flat plate shape in which wedge-shaped latent

heat storage materials

321 and 322 are combined in the same manner as the heat storage member 301 of the ninth embodiment, and the latent heat storage material It has a configuration in which the abundance ratio of 322 increases toward the top. The heat storage member 1290a is arranged upright along the left inner wall surface of the refrigerator compartment 1220. The heat storage member 1290b is arranged upright along the inner wall surface on the back side of the refrigerator compartment 1220. The heat storage member 1290c is arranged upright along the inner wall surface on the right side of the refrigerator compartment 1220. In the

heat storage members

1290a and 1290c, the latent heat storage material 321 is located on the heat radiating surface 312 side (inside the cabinet). In the heat storage member 1290b, the latent heat storage material 322 is located on the heat radiation surface 312 side.

25 to 27, an example of the direction of the cold air blown out from the cold air outlet provided in the refrigerator compartment 1220 is indicated by a thick arrow. As shown in FIGS. 25 to 27, the position and direction of the cold air outlet in the refrigerating chamber 1220 are designed so that the cold air directly strikes the heat transfer surfaces 311 of the

heat storage members

1290a, 1290b, and 1290c. The heat transfer surfaces 311 of the

heat storage members

1290a and 1290c are provided at the upper part of the inner surface. That is, in the

heat storage members

1290a and 1290c, similarly to the heat storage member 302 shown in FIG. 22C, the heat transfer surface 311 and the heat radiating surface 312 are provided on the same surface. The heat transfer surface 311 of the heat storage member 1290b is provided in the upper part of the surface on the inner wall surface side. That is, in the heat storage member 1290b, the heat transfer surface 311 and the heat radiating surface 312 are provided on different surfaces, like the heat storage member 302 shown in FIGS. 22 (a) and 22 (b).

The cold air outlet that blows cold air toward the heat transfer surfaces 311 of the

heat storage members

1290a and 1290c is disposed on the ceiling surface of the refrigerator compartment 1220. The cold air outlet that blows out cold air toward the heat transfer surface 311 of the heat storage member 1290b is disposed on the inner wall surface on the back side of the refrigerator compartment 1220 or the corner between the inner wall surface and the ceiling surface.

According to the present embodiment, since the cold heat can be radiated almost uniformly from the entire heat radiation surface 312 of the

heat storage members

1290a, 1290b, and 1290c, the temperature unevenness in the refrigerator compartment 1220 can be suppressed. In the present embodiment, since the amount of latent heat per volume is larger at the upper part of the

heat storage members

1290a, 1290b, and 1290c, cold heat can be radiated from the upper part of the heat radiation surface 312 for a longer time. In general, since the upper part of the refrigerator compartment 1220 is likely to be hotter, the temperature unevenness in the refrigerator compartment 1220 can be suppressed for a long period of time by dissipating cold heat from the upper part of the heat radiating surface 312 for a long period of time.

[Thirteenth embodiment]
Next, a heat storage container according to a thirteenth embodiment of the present invention is described with reference to FIGS. FIG. 28 is a front view showing a schematic configuration of the heat storage container 305 according to the present embodiment. FIG. 29 is a schematic cross-sectional view of the heat storage container 305 cut along line CC in FIG. The heat storage container 305 of the present embodiment is a fan-type cool box. In addition, about the component which has the same function and effect | action as the thermal storage member 301 by 9th Embodiment or the thermal storage container 304 by 12th Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

In the refrigerating chamber 1220 of the heat storage container 305,

heat storage members

1291a, 1292a, 1293a, 1291b, 1292b, 1293b, 1291c, 1292c, and 1293c are provided. Each of the

heat storage members

1291a, 1292a, 1293a, 1291b, 1292b, 1293b, 1291c, 1292c, and 1293c is combined with the wedge-shaped latent

heat storage materials

321 and 322 in the same manner as the heat storage member 301 of the ninth embodiment. It has the shape of a rectangular flat plate, and has a configuration in which the abundance ratio of the latent heat storage material 322 increases toward the top. The

heat storage members

1291a, 1292a, 1293a are arranged in this order from above along the left inner wall surface of the refrigerator compartment 1220. The

heat storage members

1291b, 1292b, and 1293b are arranged in this order from above along the inner wall surface on the back side of the refrigerator compartment 1220. The

heat storage members

1291c, 1292c, and 1293c are arranged in this order from above along the inner wall surface on the right side of the refrigerator compartment 1220. In all the

heat storage members

1291a, 1292a, 1293a, 1291b, 1292b, 1293b, 1291c, 1292c, and 1293c, the latent heat storage material 322 is located on the heat radiation surface 312 side (inside the warehouse).

The position and direction of the cold air outlet in the refrigerator compartment 1220 are designed so that the cold air is directly and uniformly applied to the heat transfer surfaces 311 of the

heat storage members

1291a, 1292a, 1293a, 1291b, 1292b, 1293b, 1291c, 1292c, and 1293c. Has been. The heat transfer surfaces 311 of all the

heat storage members

1291a, 1292a, 1293a, 1291b, 1292b, 1293b, 1291c, 1292c, and 1293c are provided on the upper part of the inner wall surface.

On the inner wall surface on the left side of the refrigerator compartment 1220, three cold air outlets for blowing cold air toward the heat transfer surfaces 311 of the

heat storage members

1291a, 1292a, and 1293a are arranged. Three cold air outlets for blowing cold air toward the heat transfer surfaces 311 of the

heat storage members

1291b, 1292b, and 1293b are arranged on the inner wall surface on the back side of the refrigerator compartment 1220. On the inner wall surface on the right side of the refrigerating chamber 1220, three cold air outlets for blowing cold air toward the heat transfer surfaces 311 of the

heat storage members

1291c, 1292c, and 1293c are arranged.

According to the present embodiment, since the

heat storage members

1291a, 1292a, 1293a, 1291b, 1292b, 1293b, 1291c, 1292c, and 1293c can dissipate the cold almost uniformly from the entire heat radiating surface 312 thereof, the refrigerator compartment The temperature unevenness in 1220 can be suppressed.

In addition, according to the present embodiment, compared to the twelfth embodiment, since the vertical length of each heat storage member can be shortened, the dispersion density of the heat conductive filler in the vertical direction in each heat storage member Can be adjusted easily.

[Fourteenth embodiment]
Next, a heat storage container according to a fourteenth embodiment of the present invention is described with reference to FIG. The heat storage container according to the present embodiment is a fan-type cool box, and has the same configuration as that of the

heat storage container

304 or 305 of the above-described embodiment except for the configuration inside the vegetable compartment 1240, for example. Fig. 30 (a) shows an example of the configuration of the vegetable compartment container 1260 provided in the vegetable compartment 1240 in the present embodiment as viewed from the front obliquely upward. FIG.30 (b) has shown an example of the structure which looked at the vegetable compartment case 1261 of the vegetable compartment container 1260 from right above. In addition, about the component which has the same function and effect | action as the thermal storage member 301 by 9th Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

30A and 30B, the vegetable compartment container 1260 includes a vegetable compartment case 1261, a stand case 1262, and an upper tray 1263. The vegetable compartment case 1261 has a deep-bottom container shape with an upper surface opened. The stand case 1262 has a deep-bottom container shape whose upper surface is opened with an opening area smaller than the opening area of the vegetable compartment case 1261. The stand case 1262 has the same depth as the vegetable compartment case 1261 and is stored in the right front corner of the vegetable compartment case 1261. The upper tray 1263 has a shallow container shape and functions as a lid that covers the upper surface opening of the vegetable compartment case 1261 except for the storage portion of the stand case 1262. The upper tray 1263 can be pulled out integrally with the vegetable compartment case 1261 and can slide back and forth with respect to the vegetable compartment case 1261 to open and close the top opening of the vegetable compartment case 1261. When the top opening of the vegetable compartment case 1261 is closed by the upper tray 1263, the internal space of the vegetable compartment container 1260 is sealed with a predetermined degree of sealing.

In the present embodiment, a cold air outlet that blows cold air that has passed through the refrigerator compartment 1220 into the vegetable compartment 1240 is provided on the right side of the inner wall on the back side of the vegetable compartment 1240. From this cold air outlet, cold air is blown out in the direction indicated by the thick arrow in the figure.

A heat storage member 1264 is attached to the outer surface of the side surface portion on the back side of the vegetable compartment case 1261. Similar to the heat storage member 301 of the ninth embodiment, the heat storage member 1264 has a rectangular flat plate shape in which wedge-shaped latent

heat storage materials

321 and 322 are combined. The heat radiation surface 312 of the heat storage member 1264 is in surface contact with the outer surface of the side portion on the back side of the vegetable compartment case 1261. The heat transfer surface 311 of the heat storage member 1264 is provided at a portion (for example, the right end portion of the surface on the inner wall surface side) where the cold air blown out from the cold air outlet directly hits. In the heat storage member 1264, the latent heat storage material 321 is located on the inner wall surface side (heat transfer surface 311 side), and the latent heat storage material 322 is located on the inner side (heat radiation surface 312 side).

In the heat storage member 1264, the ratio (existence ratio) of the latent

heat storage materials

321 and 322 in the latent heat storage material (latent heat storage materials 321 and 322) varies depending on the position of the heat storage member 1264 in the left-right direction. In the present embodiment, the existence ratio of the latent heat storage material 321 is lower toward the right side of the heat storage member 1264 and higher toward the left side. The existence ratio of the latent heat storage material 322 increases toward the right side of the heat storage member 1264 and decreases toward the left side. Since the heat transfer surface 311 is provided at the right end of the heat storage member 1264, the existence ratio of the latent heat storage material 321 is relatively high in a region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 1264 is short. It becomes low, and it becomes so high that the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 1264 becomes far.

Considering that the heat conduction filler is dispersed in the latent heat storage material 321 and the heat conduction filler is not dispersed in the latent heat storage material 322, the heat conduction filler of the latent heat storage material (latent heat storage materials 321 and 322) is used. The dispersion density varies depending on the position of the heat storage member 1264 in the left-right direction. In the present embodiment, the dispersion density of the heat conductive filler is lower toward the right side of the heat storage member 1264 and higher toward the left side. Further, the dispersion density of the heat conductive filler is relatively low in a region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 1264 is short, and from the heat transfer surface 311 in the in-plane direction of the heat storage member 1264. The higher the distance, the higher.

According to the present embodiment, cold heat can be dissipated almost uniformly from the entire heat dissipating surface 312 of the heat storage member 1264, so that temperature unevenness in the vegetable compartment container 1260 (vegetable compartment case 1261) can be suppressed. .

[Modification of heat storage member]
FIG.31 and FIG.32 has shown the modification of the structure of the thermal storage member in said each embodiment. Each of the heat storage members shown in FIGS. 31A to 31F has a configuration in which the latent heat storage material 321 in which the heat conductive filler is dispersed and the latent heat storage material 322 in which the heat conductive filler is not dispersed are combined. ing.

A heat storage member 1301 shown in FIG. 31A includes a heat transfer surface 311 through which cold heat is transmitted from the cooler 350 at the upper part of the inner wall surface (left side in the drawing). The heat transfer surface 311 is provided on the latent heat storage material 321. Further, the heat storage member 1301 includes a heat radiating surface 312 on almost the entire inner surface (right side in the drawing). The existence ratio of the latent heat storage material 321 in the heat storage member 1301 is minimum at the upper end portion, increases monotonically and linearly toward the center portion, and becomes maximum at the center portion. When the center portion is exceeded, the abundance ratio of the latent heat storage material 321 becomes the minimum again, increases monotonically and linearly toward the lower end portion, and becomes the maximum at the lower end portion. The heat storage member 1301 has the first region A1 including the heat transfer surface 311 in part, and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. . Like the heat storage member 1301, the existence ratio of the latent heat storage material 321 does not necessarily need to monotonously increase from the upper end to the lower end of the heat storage member.

A heat storage member 1302 shown in FIG. 31B includes a heat transfer surface 311 and a heat radiation surface 312 at the same positions as the heat storage member 1301. The existence ratio of the latent heat storage material 321 in the heat storage member 1302 is minimum at the upper end portion, increases monotonically and linearly toward the center portion, and becomes maximum at the center portion. The existence ratio of the latent heat storage material 321 is minimum in a predetermined range below the central portion, and is maximum in a range from the lower end to the lower portion. The heat storage member 1302 has the first region A1 including the heat transfer surface 311 in a part, and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. . Like the heat storage member 1302, the presence ratio of the latent heat storage material 321 does not necessarily have to increase monotonously from the upper end to the lower end of the heat storage member.

A heat storage member 1303 shown in FIG. 31 (c) includes a heat transfer surface 311 and a heat dissipation surface 312 at the same positions as the heat storage member 1301. The abundance ratio of the latent heat storage material 321 in the heat storage member 1303 is minimum at the upper end, gradually increases toward the lower end, and is maximum near the lower end. The heat storage member 1303 has the first region A1 including the heat transfer surface 311 in part and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. . Like the heat storage member 1303, the existence ratio of the latent heat storage material 321 does not necessarily increase linearly from the upper end to the lower end of the heat storage member.

A heat storage member 1304 shown in FIG. 31 (d) includes a first heat transfer surface 311a to which cold heat is transmitted from the cooler 350a on the upper part of the inner wall surface side, and the lower side of the central part of the same surface. In addition, a second heat transfer surface 311b through which cold heat is transmitted from the cooler 350b is provided. The heat storage member 1304 includes a heat radiating surface 312 on almost the entire inner surface. The existence ratio of the latent heat storage material 321 in the heat storage member 1304 is minimum at the upper end portion, increases monotonically and linearly toward the center portion, and becomes maximum at the center portion. In addition, the existence ratio of the latent heat storage material 321 becomes minimum again below the center portion, increases monotonically and linearly toward the lower end portion, and becomes maximum at the lower end portion. The heat storage member 1304 has the first region A1 including the heat transfer surface 311a in part, and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. . According to the heat storage member 1304, since the

heat transfer surfaces

311a and 311b are provided at two locations, the cold heat from the

coolers

350a and 350b can be quickly transmitted to the entire heat storage member 1304.

The heat storage member 1305 shown in FIG. 31 (e) includes a heat transfer surface 311 through which cold heat is transmitted from the cooler 350 at the lower part of the surface on the inner wall surface side. The heat transfer surface 311 is provided on the latent heat storage material 321 side of the heat storage member 1305. The heat storage member 1305 is provided with a heat radiating surface 312 on almost the entire inner surface. The abundance ratio of the latent heat storage material 321 in the heat storage member 1305 is maximum at the upper end, monotonously decreases toward the lower end, and is minimum within a predetermined range near the lower end. The heat storage member 1305 has the first region A1 including the heat transfer surface 311 in part and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. . Like the heat storage member 1305, the heat transfer surface 311 may be provided below the heat storage member 1305.

The heat storage member 1306 shown in FIG. 31 (f) includes a heat transfer surface 311 through which cold heat is transmitted from the cooler 350 at the upper part of the surface on the inner wall surface side. The heat transfer surface 311 is provided on the latent heat storage material 322 side of the heat storage member 1306. In addition, the heat storage member 1301 includes a heat radiating surface 312 on almost the entire inner surface. The existence ratio of the latent heat storage material 321 in the heat storage member 1306 is minimum at the upper end, increases monotonically and linearly toward the lower end, and is maximum at the lower end. The heat storage member 1306 has the first region A1 including the heat transfer surface 311 in part and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. . Like this heat storage member 1306, the heat transfer surface 311 may be provided on the latent heat storage material 322 side.

The heat storage member 1307 shown in FIG. 32 (a) has a configuration in which three gel-like latent

heat storage materials

1321, 1322, and 1333 each having a rectangular flat plate shape are combined in the vertical direction. In the latent heat storage material 1321 positioned above the heat storage member 1307, the heat conductive filler is not dispersed, or the heat conductive filler is dispersed at a relatively low dispersion density. In the latent heat storage material 1322 located at the center of the heat storage member 1307, the heat conductive filler is dispersed at a higher dispersion density than the latent heat storage material 1321. In the latent heat storage material 1323 located in the lower part of the heat storage member 1307, the heat conductive filler is dispersed at a higher dispersion density than the latent heat storage material 1322. The latent

heat storage materials

1321, 1322, and 1323 of this example are formed using the same material except that the dispersion densities of the heat conductive fillers are different from each other.

The heat storage member 1307 is provided with a heat transfer surface 311 to which cold heat is transmitted from the cooler 350 at the upper part of the surface on the inner wall surface side. The heat transfer surface 311 is provided on the latent heat storage material 1321. The heat storage member 1307 is provided with a heat radiating surface 312 on almost the entire inner surface.

Considering the dispersion density of the heat conductive filler in each of the latent

heat storage materials

1321, 1322, and 1323, the dispersion density of the heat conductive filler in the heat storage member 1307 is gradually decreased toward the upper part of the heat storage member 1307, and the level is decreased toward the lower part. Is getting higher. Further, the dispersion density of the heat conductive filler is relatively low in a region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 1307 is short, and the heat transfer filler 1307 has a dispersion density from the heat transfer surface 311 in the in-plane direction. The distance increases as the distance increases. The heat storage member 1307 has the first region A1 including the heat transfer surface 311 in a part, and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. .

A heat storage member 1308 shown in FIG. 32 (b) includes a latent heat storage material 1324 having a predetermined gradient in the dispersion density of the heat conductive filler. The dispersion density of the heat conductive filler in the latent heat storage material 1324 is higher in the lower left portion in the figure and lower in the upper right portion in the figure. That is, the dispersion density of the heat conductive filler in the latent heat storage material 1324 is higher on the lower side when compared in the vertical direction and higher on the left side when compared in the left and right direction. The heat storage member 1308 includes a heat transfer surface 311 to which cold heat is transmitted from the cooler 350 on the upper part of the surface on the inner wall surface side. Further, the heat storage member 1308 is provided with a heat radiating surface 312 on almost the entire inner surface.

The dispersion density of the heat conductive filler in the heat storage member 1308 is relatively low in the region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 1308 is short, and the heat transfer surface in the in-plane direction of the heat storage member 1308. The distance from 311 increases as the distance increases. The heat storage member 1308 has the first region A1 including the heat transfer surface 311 in part, and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. . According to this heat storage member 1308, since it can produce using one latent heat storage material, compared with the heat storage member produced combining two latent heat storage materials, manufacturing cost can be reduced.

FIG. 32 (c) is a diagram illustrating an example of a method for manufacturing the heat storage member 1308. When manufacturing the heat storage member 1308, first, the gel-like latent heat storage material 1324 in which the heat conductive filler is dispersed is heated to melt the latent heat storage material 1324 and the gelling agent, and the fluidity of the latent heat storage material 1324 is increased. Cause it to occur. Next, the latent heat storage material 1324 in which fluidity has occurred is poured into a predetermined mold inclined obliquely, and the state is maintained for a predetermined time. Thus, as shown in FIG. 32 (c), due to the specific gravity difference between the latent heat storage material and the heat conductive filler, the dispersion density of the heat conduction filler increases toward the vertically lower side, and the dispersion density of the heat conduction filler increases toward the upper vertical side. Lower. Thereafter, the latent heat storage material 1324 is cooled and solidified, removed from the mold, and the outside is covered with a sealing film 323. The heat storage member 1308 is produced by the above procedure.

A heat storage member 1309 shown in FIG. 32 (d) includes a latent heat storage material 1325 having a predetermined gradient in the dispersion density of the heat conductive filler. The dispersion density of the heat conductive filler in the latent heat storage material 1325 is higher in the lower part of the drawing and lower in the upper part of the drawing. The heat storage member 1309 includes a heat transfer surface 311 to which cold heat is transmitted from the cooler 350 at the upper part of the surface on the inner wall surface side. The heat storage member 1309 is provided with a heat radiating surface 312 on almost the entire inner surface.

The dispersion density of the heat conductive filler in the heat storage member 1309 is relatively low in the region where the distance from the heat transfer surface 311 in the in-plane direction of the heat storage member 1309 is short, and the heat transfer surface in the in-plane direction of the heat storage member 1309. The distance from 311 increases as the distance increases. The heat storage member 1309 has the first region A1 including the heat transfer surface 311 in part and the second region A2 in which the dispersion density of the heat conductive filler is higher than the first region A1 in another part. . According to this heat storage member 1309, since it can produce using one latent heat storage material, compared with the heat storage member produced combining two latent heat storage materials, manufacturing cost can be reduced.

Also according to each of the above-described modifications, since the cold heat can be dissipated almost uniformly from the entire heat radiation surface 312 of the heat storage member, similarly to the above-described embodiments, it is possible to suppress the temperature unevenness in the cool box. it can.

33 and 34 show a modification of the configuration of the heat storage member in each of the above embodiments. FIG. 33 shows a cross-sectional configuration of the heat storage member 1350. For example, as shown in FIG. 1, the heat storage member 1350 includes an elastic member 60 in the container 30, and a cooler 350 shown in FIG. 19, for example. The cooler 350 is in contact with an upwardly biased portion (for example, the upper end portion) of the surface of the heat storage member 1350 on the inner wall surface side of the cool box. In the container 30, water-based latent

heat storage materials

321 and 322 are accommodated. The first latent heat storage material 321 is mixed with a heat conductive filler at a predetermined dispersion density. The second latent heat storage material 322 is not mixed with a heat conductive filler.

As shown in FIG. 33 (a), for example, an aqueous latent heat storage material 321 (L) in a liquid phase at room temperature is arranged in layers so as to be in contact with almost the entire area of the inner wall surface 40a of the first member 40. Yes. The first latent heat storage material 321 (L) has a triangular shape in the cross section shown in FIG. 33, and tapers as it approaches the cooler 350. The second latent heat storage material 322 (L) has a quadrangular shape in the cross section shown in FIG. 33, and tapers as the distance from the cooler 350 increases. The first and second latent heat storage materials 321 (L) and 322 (L) are combined so that their slopes are in surface contact with each other. The elastic member 60 laminated with the second latent heat storage material 322 (L) has one surface in contact with almost the entire area of the second latent heat storage material 322 (L) and the other surface of the bottom surface portion 51. Arranged in layers so as to be in contact with substantially the entire inner wall surface 51a. The first latent heat storage material 321 and the first latent heat storage material 321 at positions farther from the cooler 350 than the sum of the thicknesses of the first latent heat storage material 321 and the second latent heat storage material 322 on the side closer to the cooler 350 in the thickness direction. The sum of the thicknesses in the plate thickness direction of the second latent heat storage material 322 is larger. Since the distance between the opposing inner wall surfaces 40a and 51a (distance in the plate thickness direction) is substantially constant, the thickness in the plate thickness direction of the elastic member 60 on the side closer to the cooler 350 is more elastic at the position away from the cooler 350. The thickness of the member 60 is larger than the thickness in the plate thickness direction. That is, the contraction amount of the elastic member 60 at a position away from the cooler 350 is larger than the contraction amount of the elastic member 60 on the side close to the cooler 350.

On the other hand, as shown in FIG. 33 (b), the latent heat storage materials 321 (S) and 322 (S), which are cooled to a temperature lower than the melting point in a cool box or the like and change in phase from the liquid phase to the solid phase, have latent heat. The heat storage materials 321 (L) and 322 (L) expand at a predetermined volume change rate. The first latent heat storage material 321 has a volume change rate smaller than that of the second latent heat storage material 322 by the amount mixed with the heat conductive filler. On the side close to the cooler 350, the amount of the second latent heat storage material 322 is larger than that of the first latent heat storage material 321, and the amount of the first latent heat storage material 321 gradually increases as the distance from the cooler 350 increases. Since the amount of the latent heat storage material 322 gradually decreases, the expansion amount in the plate thickness direction of the latent heat storage materials 321 (S) and 322 (S) that have changed to a solid phase is relatively close to the cooler 350 side. It becomes larger and becomes relatively smaller at a position away from the cooler 350. Thereby, as shown in FIG.33 (b), the shrinkage | contraction amount of the elastic member 60 can be made substantially constant along the inner wall face 51a. Also according to this modification, the same effect as the configuration shown in FIG. 1 can be obtained.

Further, in a region where the distance from the heat transfer surface in the in-plane direction of the heat storage member 1350 is long, the thermal conductivity is relatively high and the latent heat amount is relatively small. Therefore, in this region, the heat transfer from the heat transfer surface can be made relatively fast, and the time required for the phase change from the liquid phase to the solid phase can be made relatively short. On the other hand, the region where the distance from the heat transfer surface in the in-plane direction of the heat storage member 1350 is short has a relatively low thermal conductivity and a relatively large amount of latent heat. Therefore, in the said area | region, while the heat transfer of the cold heat from a heat transfer surface can be made comparatively late, the time required for the phase change from a liquid phase to a solid phase can be made comparatively long.

Thereby, it is possible to suppress the occurrence of variations in the time until the phase change from the liquid phase to the solid phase is completed between the regions of the heat storage member 1350. Therefore, it is possible to shorten the time from the completion of the phase change first in a certain region of the latent

heat storage materials

321 and 322 to the completion of the phase change of the entire latent

heat storage materials

321 and 322. For this reason, even if the heat transfer surface is at a position where the heat storage member 1350 is deviated, the entire heat dissipation surface can be cooled almost simultaneously, so that temperature unevenness inside the heat storage member 1350 can be suppressed. Therefore, according to this modification, cold heat can be dissipated almost uniformly from the entire heat dissipating surface of the heat storage member 1350 (see FIG. 33B), and temperature unevenness in the cool box can be suppressed.

FIG. 34 shows a modification of the heat storage member 8 shown in FIG. 34A and 34B show a schematic cross-sectional configuration of the heat storage member 8 according to this modification. FIG. 34C shows a schematic plan configuration of the heat storage member 8 according to this modification. As shown in FIGS. 34 (a) to 34 (c), the heat storage member 8 of this modification is provided with a cooler 350 at the upper end portion of the bottom surface portion 51 of the second member 50 of the heat storage member 8 shown in FIG. It is characterized in that Furthermore, the present modification is characterized in that the elastic modulus is changed for each arrangement position by giving a distribution to the arrangement density of the plurality of compression springs 68. The other configuration is the same as that shown in FIG.

As shown in FIG. 34 (c), in the vicinity of the cooler 350, a first compression spring 68a formed of a spring member made of a metal material having a first elastic modulus and excellent thermal conductivity is provided in the cooler. Two pieces are arranged at substantially equal intervals along the long side of 350.

Further, a first spring member made of a metal material having a second elastic modulus smaller than the first elastic modulus and excellent in thermal conductivity at a position away from the cooler 350 from the first compression spring 68a. Two compression springs 68b are arranged along the long side of the cooler 350 at substantially equal intervals.

Further, a first spring member made of a metal material having a third elastic modulus smaller than the second elastic modulus and excellent in thermal conductivity at a position away from the cooler 350 from the second compression spring 68b. Four compression springs 68 c are arranged along the long side of the cooler 350 at substantially equal intervals.

The cold heat output from the cooler 350 is transmitted to the compression springs 68a, 68b, 68c via the bottom surface portion 51 of the second member 50 and the air layer 69. One end of each of the compression springs 68a, 68b, 68c is connected to the other surface of the plate-like member 66, and the other end is connected to the inner wall surface 51a. The compression springs 68a, 68b, 68c expand and contract in the plate thickness direction of the heat storage member 8. The compression springs 68a, 68b, 68c are in a compressed state by the first compression amount when the latent heat storage material 10 is in the expanded phase state (in this example, the liquid phase state (L)), and the latent heat storage material 10 contracts. In the case of the phase state (solid phase state (S) in this example), it is in a state compressed with a second compression amount smaller than the first compression amount, or in a non-compressed state. At least in the phase state in which the latent heat storage material 10 is expanded, the plate-like member 66 is urged toward the latent heat storage material 10 by the elastic force of the compression spring 68.

As shown in FIG. 34 (a), the latent heat storage material 10 (L) is in a liquid phase at room temperature. The compression springs 68a, 68b, and 68c are in a state compressed by the first compression amount in the plate thickness direction. The

compressed compression springs

68a, 68b, and 68c urge the plate-like member 66 toward the latent heat storage material 10 (L). As a result, the latent heat storage material 10 (L) is pressed against the inner wall surface 40 a side by the plate-like member 66 with a substantially uniform pressure. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 10 (L) and the first member 40. Therefore, the heat storage characteristic at the time of storing heat in the latent heat storage material 10 (L) from the outside via the first member 40 can be improved. That is, according to the heat storage member 8, the high heat storage characteristic with respect to the latent heat storage material 10 (L) is acquired in the 1st member 40 side. Moreover, since the latent heat storage material 10 (L) can be pressed to the inner wall surface 40a side with a substantially uniform pressure, deformation of the latent heat storage material 10 (L) can be prevented.

On the other hand, as shown in FIG. 34 (b), the latent heat storage material 10 (S) becomes a solid phase when cooled in a cool box or the like. The latent heat storage material 10 (S) contracts at a predetermined volume change rate with respect to the latent heat storage material 10 (L). When the latent heat storage material 10 (S) contracts in the plate thickness direction, the compression springs 68a, 68b, 68c expand in the direction to return to the original shape, and the second compression amount is smaller than the first compression amount in the plate thickness direction. Compressed state or uncompressed state. For example, the thickness of the air layer 69 that is increased by the expansion of the compression springs 68 a, 68 b, 68 c is substantially equal to the thickness in the plate thickness direction that is decreased by the contraction of the latent heat storage material 10. Therefore, before and after the phase change from the liquid phase to the solid phase of the latent heat storage material 10, the sum of the thickness of the latent heat storage material 10, the thickness of the plate-like member 66, and the thickness of the air layer 69 (the thickness of the internal space). (Thickness in the direction) can be made substantially the same, so that deformation of the container 30 is further suppressed.

In addition, when the compression springs 68a, 68b, 68c are in the compressed state with the second compression amount, the latent heat storage material 10 (S) is kept at a substantially uniform pressure by the elastic force of the compression springs 68a, 68b, 68c. It is pressed against the wall surface 40a. For this reason, it is possible to prevent a gap from being formed between the latent heat storage material 10 (S) and the first member 40. Therefore, it is possible to improve the heat dissipation characteristics when heat is radiated from the latent heat storage material 10 (S) to the outside via the first member 40. Further, when the compression springs 68a, 68b, 68c are in a state compressed by the second compression amount, the latent heat storage material 10 (S) can be pressed to the inner wall surface 40a side with a substantially uniform pressure. The deformation of the material 10 (S) can be prevented.

From the state shown in FIG. 34 (b), when the temperature in the cold storage chamber rises due to, for example, a power failure and the temperature of the latent heat storage material 10 (S) reaches the melting point, the latent heat storage material 10 changes from a solid phase to a liquid phase. Change. At this time, the heat of fusion (cold heat) of the latent heat storage material 10 is released into the cool box through the first member 40, and the cool box is kept cool for a predetermined time. When the phase change of the latent heat storage material 10 from the solid phase to the liquid phase is completed, the state returns to the state shown in FIG. That is, the latent heat storage material 10 (L) that has undergone a phase change from the solid phase to the liquid phase expands at a predetermined volume change rate with respect to the latent heat storage material 10 (S). When the latent heat storage material 10 expands in the plate thickness direction, the compression springs 68a, 68b, 68c are compressed within an elastic range by a compression load applied from the latent heat storage material 10 via the plate-like member 66. For example, the thickness of the air layer 69 that decreases due to compression of the compression springs 68 a, 68 b, 68 c is substantially equal to the thickness in the plate thickness direction increased by the expansion of the latent heat storage material 10. Therefore, before and after the phase change of the latent heat storage material 10 from the solid phase to the liquid phase, the sum of the thickness of the latent heat storage material 10, the thickness of the plate-like member 66, and the thickness of the air layer 69 (the thickness of the internal space) (Thickness in the direction) can be made substantially the same, so that deformation of the container 30 is further suppressed.

Moreover, since the arrangement | positioning density of the compression spring 68 is high in the area | region where the distance from the heat transfer surface in the in-plane direction of the heat storage member 8 is high, thermal conductivity becomes relatively higher than the area | region where the distance from a heat transfer surface is near. . Therefore, in this region, the heat transfer from the heat transfer surface can be made relatively fast, and the time required for the phase change from the liquid phase to the solid phase can be made relatively short. On the other hand, in the region where the distance from the heat transfer surface in the in-plane direction of the heat storage member 8 is close, the thermal conductivity is relatively lower than the region where the distance from the heat transfer surface is far away because the arrangement density of the compression springs 68 is low. . Therefore, in the said area | region, while the heat transfer of the cold heat from a heat transfer surface can be made comparatively late, the time required for the phase change from a liquid phase to a solid phase can be made comparatively long.

Thereby, it is possible to suppress the occurrence of variations in the time until the phase change from the liquid phase to the solid phase is completed between the regions of the heat storage member 8. Therefore, it is possible to shorten the time from the completion of the phase change first in a certain region of the latent heat storage material 10 to the completion of the phase change of the entire latent heat storage material 10. For this reason, even if the heat transfer surface is located at a position where the heat storage member 8 is biased, the entire heat radiation surface can be cooled almost simultaneously, so that temperature unevenness inside the heat storage member 8 can be suppressed. Therefore, according to this modification, cold heat can be dissipated almost uniformly from the entire heat radiating surface of the heat storage member 8, and temperature unevenness in the cool box can be suppressed.

The present invention is not limited to the above embodiment, and various modifications can be made.
For example, in the said embodiment, although the heat storage member which stores cold energy was mentioned as an example, this invention is applicable not only to this but the heat storage member which stores warm heat. For example, the heat transfer surface of the heat storage member may be brought into contact with a heater (heat source) so that the heat of the heater is directly transmitted to the heat transfer surface. Moreover, you may make it the heat transfer surface of a thermal storage member transmit the warm temperature of a heater via warm air (forced convection air).

In the above-described embodiment, the cold storage that cools the stored item is taken as an example, but the present invention can also be applied to a warm storage chamber that holds the stored item warm.

Moreover, in the said embodiment, although the combination of the latent heat storage material 321,322 formed using the same material and having the same phase change temperature was mentioned as an example, this invention is not limited to this, The latent heat storage material 321 is mentioned. 322 may be formed using different materials from each other, or may have different phase change temperatures. The same applies to the latent

heat storage materials

1321, 1322, and 1323.

Moreover, in the said embodiment, although the latent heat storage material 322 in which the heat conductive filler is not disperse | distributed was mentioned as an example, this invention is not limited to this, The dispersion density lower than the latent heat storage material 321 is not limited to this. The heat conductive filler may be dispersed.

In the above embodiment, the vapor compression refrigeration cycle is exemplified as a cooling mechanism for cooling the inside of the heat storage container, but the present invention is not limited to this, and an electronic cooling system using an absorption cooling device or the Peltier effect is used. A cooling device may be used.

Moreover, in the said embodiment, although the structure where the outer side of the latent heat storage material was covered with the sealing film 323 was mentioned as an example, this invention is not limited to this, The outer side of a latent heat storage material is not covered with the sealing film 323. It can also be applied to configurations.

Moreover, in the said embodiment, although the heat storage member arrange | positioned along the inner wall surface (side surface) of heat storage containers, such as a cold storage box, was mentioned as an example, this invention is not limited to this, The ceiling surface of a heat storage container, The present invention can also be applied to a heat storage member that is laid along a bottom surface, a shelf, or the like.

Moreover, in the said embodiment, although the heat storage member provided in the inner wall surface of heat storage containers, such as a cool box, was mentioned as an example, this invention is not restricted to this, Building materials (a wall material, a flooring material, a ceiling material, etc.) ), And heat storage members used for wall materials, floor materials, etc. of automobile cabins. In this case, for example, a portion directly hit by cold air or hot air blown out from an air conditioner of a building or an automobile becomes a heat transfer surface of the heat storage member. In this case, the heat storage member may be attached to a plate-shaped member having a predetermined strength, or the container having a predetermined strength may be filled with the heat storage member.

In the heat storage container of the above embodiment, the heat storage member may be detachable.

The present invention can be widely used in the fields of a heat storage member using a latent heat storage material, a heat storage container using the latent heat storage material, and a building material.

1 to 8, 130, 131, 132 Heat storage member 10, 10 (L), 10 (S), 20, 20 (L), 20 (S) Latent heat storage material 10a Side end surface 11 Recess 30 Container 40 First member 40a Inside Wall surface 50 Second member 51 Bottom surface portion 51a Inner wall surface 52, 54 Side surface portions 60, 62, 64 Elastic body 66 Plate member 68 Compression spring 69 Air layer 70, 72 Air gap 100 Box body 101 Bottom surface portion 102-105 Side surface portion 106 Partition Plate 110 Door member 120, 121, 122 Insertion hole 140, 141 Accommodating space 150, 152 Base material 160 Heat storage container main body 162 Door member 164 Door packing 166 Evaporator 168 Pipe 170 Compressor 172 Refrigeration chamber 174 Freezer compartment 176 Freezer compartment door 201 204 Heat storage containers 301, 302, 1170, 1264, 1290a, 1290b, 1290c, 1291a, 12 91b, 1291c, 1292a, 1292b, 1292c, 1293a, 1293b, 1293c, 1301 to 1309 Heat storage member 303, 304, 305 Heat storage container 311, 311a, 311b Heat transfer surface 312 , 1325 Latent heat storage material 323 Sealing film 350, 350a, 350b, 1150, 1280 Cooler 354 Cold air outlet 1110, 1210 Thermal storage container main body 1120, 1220 Refrigeration chamber 1130, 1223, 1235, 1236 Door member 1132 Door packing 1140, 1270 Compressor 1160 Refrigerant piping 1221 Shelf 1230 Freezer compartment 1231 Upper freezer compartment 1232 Lower freezer compartment 1233, 1234 Freezer compartment tray 1240 Vegetable compartment 1250, 1251 Partition wall 1260 Vegetable compartment Container 1261 Vegetable room case 1262 Stand case 1263 Upper tray 1400 Shallow container

Claims

A container comprising a pair of inner wall surfaces facing each other and an internal space formed between the pair of inner wall surfaces;
A latent heat storage material that is disposed in the internal space in contact with one of the pair of inner wall surfaces, reversibly changes between a solid phase and a liquid phase, and causes expansion or contraction in the phase change; and
An elastic member that is disposed between the latent heat storage material and the other of the pair of inner wall surfaces and elastically deforms in response to expansion or contraction of the latent heat storage material.
The heat storage member according to claim 1,
The said heat storage member characterized by the above-mentioned. The said container has the rigidity which does not deform | transform substantially at the external pressure of an installation place.
In the heat storage member according to claim 1 or 2,
The elastic member is in a contracted state with a first contraction amount when the latent heat storage material is in an expanded phase state, and is smaller than the first contraction amount when the latent heat storage material is in a contracted phase state. A heat storage member characterized by being in a state of being contracted by the second contraction amount or not contracting.
In the heat storage member according to claim 3,
The heat storage member, wherein the elastic member in a state of being contracted by the first contraction amount has an elastic force smaller than a force for deforming the container.
In the heat storage member according to claim 3 or 4,
The heat storage member according to claim 1, wherein the elastic member contracted by the first contraction amount has an elastic force smaller than a force for deforming the latent heat storage material.
In the heat storage member according to any one of claims 1 to 5,
The heat storage member, wherein the elastic member is in contact with the other of the pair of inner wall surfaces.
In the heat storage member according to any one of claims 1 to 5,
It further includes another latent heat storage material that is disposed between the elastic member and the other of the pair of inner wall surfaces, reversibly changes between a solid phase and a liquid phase, and causes expansion or contraction in the phase change. A heat storage member characterized by the above.
In the heat storage member according to any one of claims 1 to 7,
The heat storage member, wherein the elastic member includes a porous elastic body.
In the heat storage member according to any one of claims 1 to 7,
The elastic member is provided in contact with the latent heat storage material and is movable according to expansion or contraction of the latent heat storage material, and an urging force for biasing the plate member toward the latent heat storage material A heat storage member comprising: a member.
The heat storage member according to claim 9,
The urging member includes a resin spring having one end connected to the plate-like member and the other end connected to the other of the pair of inner wall surfaces.
In the heat storage member according to any one of claims 1 to 10,
The latent heat storage material includes an aqueous solution of paraffin, water, or salt.
In the heat storage member according to any one of claims 1 to 11,
The latent heat storage material includes a gelling agent.
The heat storage member as described in any one of Claim 1-12 is used. The heat storage container characterized by the above-mentioned.
The heat storage member as described in any one of Claim 1-12 is used. The building material characterized by the above-mentioned.
A gel-like latent heat storage material that reversibly changes between a solid phase and a liquid phase;
A plurality of heat conductive fillers having a higher thermal conductivity than the latent heat storage material and dispersed in the latent heat storage material;
A first region provided with a part of the latent heat storage material, and having a heat transfer surface for transferring heat from a heat source;
A heat storage member, comprising: a second region provided in another part of the latent heat storage material, wherein a dispersion density of the heat conductive filler is higher than the first region.
The heat storage member according to claim 15,
The heat storage member, wherein the second region is farther from the heat transfer surface than the first region.
The heat storage member according to claim 15 or 16,
The heat storage member according to claim 1, wherein a dispersion density of the heat conductive filler in the latent heat storage material increases as a distance from the heat transfer surface increases.
The heat storage member according to any one of claims 15 to 17,
The latent heat storage material is
A first latent heat storage material in which the heat conductive filler is dispersed at a predetermined dispersion density;
A second latent heat storage material provided in contact with the first latent heat storage material, the dispersion density of the heat conductive filler being lower than the predetermined dispersion density,
The existence ratio of the first latent heat storage material in the latent heat storage material in the second region is higher than the existence ratio of the first latent heat storage material in the latent heat storage material in the first region. Thermal storage member.
The heat storage member according to claim 18,
The heat storage member, wherein an abundance ratio of the first latent heat storage material in the latent heat storage material increases as a distance from the heat transfer surface increases.
The heat storage member according to claim 18 or 19,
The heat storage member, wherein the heat transfer surface is provided on the first latent heat storage material.
In the heat storage member according to any one of claims 15 to 20,
The heat storage member, wherein the heat transfer surface is in contact with the heat source.
In the heat storage member according to any one of claims 15 to 20,
The heat transfer member is characterized in that heat from the heat source is transmitted through cold air or hot air.
In the heat storage member according to any one of claims 15 to 22,
The heat source is a cooler or a heater.
In the heat storage member according to any one of claims 15 to 23,
The latent heat storage material includes an aqueous solution of paraffin, water, or salt.
In the heat storage member according to any one of claims 15 to 24,
The heat storage member according to claim 1, wherein the heat conductive filler has a heat conductivity of 10 to 500 W / (m · K).
In the heat storage member according to any one of claims 15 to 25,
The heat storage member, wherein the heat conductive filler has a size of 1 μm to 1 mm.
A storage room for storing stored items;
A heat source for keeping the storage chamber at a predetermined temperature;
A heat storage member disposed in the storage chamber,
The heat storage member according to any one of claims 15 to 26 is used as the heat storage member.
A heat storage member according to any one of claims 15 to 26 is used.