JPH0938397A - Heater accumulator and heat accumulating iron using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the heat conductivity between a heat accumulator and an iron base by constituting the heat accumulator used in a heat accumulating iron by housing a heat accumulating material in a metal heat accumulating container. SOLUTION: An iron base 1 is constituted by providing the heater 2 heating the iron base 1, a steam chamber 3 generating steam and a heat accumulator 4. The heat accumulator 4 is constituted by housing a heat accumulating material and a high heat conductivity material in a metal heat accumulating container and providing a graphite layer to the bottom surface of the container. The heat accumulating container is formed of aluminum in order to avoid the chemical reaction of the housed heat accumulating material and the high heat conductivity material and the heat accumulating material necessarily contains an eutectic compsn. alloy wherein Sn:Bi is 42:58(wt.%) and Sn is 37-47wt.% and Bi is 53-63wt.%. As the high heat conductivity material, foamed metal or metal having honeycomb space parts is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage device which uses a heat storage material to suppress a temperature drop, and a heat storage iron using the heat storage device.

[0002]

2. Description of the Related Art Generally, heat storage materials can be broadly classified into three types: sensible heat type, latent heat type, and chemical reaction heat type. In particular, the latent heat type heat storage material utilizes latent heat associated with melting or crystal phase transition, has a high heat storage density and does not require a complicated device, and thus is highly practical. The present inventors have studied a heat storage device using a latent heat storage material as an auxiliary heat source for irons and other electric appliances. As a result, it has been found that organic substances such as paraffin wax, polyethylene, and pentaerythritol are advantageous in terms of heat storage.

[0003]

However, the conventional latent heat type heat storage device containing the organic substance has the following problems. One is that the initial heat storage characteristics cannot be maintained because the material that is the main ingredient of the heat storage material undergoes thermal decomposition or reacts with the container due to the continuation of the cycle of repeatedly raising and lowering the temperature. is there. Secondly, there is a fatal drawback that the heat storage amount cannot be effectively utilized due to the low thermal conductivity peculiar to organic substances.
Thirdly, when the heat storage material is to be housed in the heat storage container provided on the iron base, the heat conduction greatly depends on the housing state of the heat storage container. Therefore, the heat storage material may not be able to sufficiently store the heat from the heater, or even if the heat is stored, the amount of heat may not be effectively utilized and the temperature decrease of the iron base may not be suppressed.

The present invention is intended to improve the thermal instability of such a conventional organic material and the thermal conductivity between the heat storage device and the iron base utilizing the heat storage of the heat storage device. A first object of the present invention is to provide a heat storage device that can effectively transfer the heat storage amount of the heat storage material to the outside.
A second object is to provide a heat storage device having improved thermal conductivity in the container containing the heat storage material. A third object is to provide a heat storage device in which heat transfer from the heater to the heat storage section is enhanced. Furthermore, it is a fourth to sixth object to provide a heat storage device that can effectively use the amount of heat when the heat storage material changes state from a liquid phase to a solid phase as the amount of heat storage. A seventh object is to provide a heat storage device having good heat conductivity to the outside, particularly by increasing heat conductivity inside the container. An eighth object is to provide a heat storage device in which the heat conduction from the heater to the heat storage section is further enhanced.

A ninth object of the present invention is to provide a convenient heat storage iron which can improve the heat conductivity from the heat storage device and suppress the temperature drop of the iron base.
It is a tenth object to provide a heat storage iron in which heat absorption from the heater and heat dissipation to the iron base are appropriate. Further, it is an eleventh object to provide a heat storage iron capable of suppressing a decrease in temperature of the iron base. A twelfth object is to provide a heat storage iron in which heat absorption from the heater and heat dissipation to the iron base are more appropriate. Further, it is a thirteenth object to provide a heat storage iron capable of suppressing the temperature decrease of the iron base by devising the arrangement position of the heat storage device.

[0006]

A first means of the present invention for achieving the first object is a heat storage device in which a heat storage material is contained in a metal container.

A second means of the present invention for achieving the second object is a heat storage device in which a heat storage material and a high thermal conductivity material are housed inside a metal heat storage container.

A third means of the present invention for achieving the third object is to store a heat storage material and a high thermal conductivity material inside a heat storage container made of metal, and to have a high orientation at the bottom of the heat storage container. This is a heat storage device in which a graphite layer is closely attached.

A fourth means of the present invention for achieving the fourth object is that the heat storage material always contains a eutectic composition alloy having Sn: Bi of 42:58 (wt%), and Sn is 37 to 37%. 47
Weight% and Bi are heat storage devices using alloys in the composition range of 53 to 63% by weight.

The fifth means of the present invention for achieving the fifth object is that the heat storage material is Sn: Pb 63:37.
(Wt%) must contain eutectic alloy, Sn is 58
˜68 wt%, Pb is a heat storage device using an alloy within the composition range of 32-42 wt%.

A sixth means of the present invention for achieving the sixth object is that the heat storage material always contains a eutectic composition alloy in which Sn: Zn is 91: 9 (wt%), and Sn is 86 to 86%. 96
The heat storage device uses an alloy having a composition range of 4% to 14% by weight and Zn.

The seventh means of the present invention for achieving the seventh object is to use a heat storage material as a high thermal conductivity material in a foam metal or a honeycomb-shaped space portion in order to enhance heat conduction in the container. This is a filled heat storage device.

An eighth means of the present invention for achieving the eighth object is to store a heat storage material and a high thermal conductivity material inside a metal container, and to provide a highly oriented material at the bottom of the heat storage container. The ab plane of the crystal of the graphite layer, that is, the cleavage plane of the crystal is provided in the heat storage device in parallel with the bottom of the heat storage container.

Further, a ninth means of the present invention for attaining the ninth object is a heat storage iron capable of suppressing a temperature decrease of a cordless iron by bringing a heat storage device and an iron base into close contact with each other on the bottom surface side of the iron base. To do.

Further, the tenth means of the present invention for achieving the tenth object, in order to efficiently conduct heat between the heat storage device and the iron base, the center of the heat storage device in the height direction is set. The heat storage iron is configured to have the same distance from the bottom surface of the iron base of the heater of the iron base and to be the center between the terminals of the heater.

Further, an eleventh means of the present invention for attaining the eleventh object is to store a heat storage material and a high thermal conductivity material inside a metal container and to install a heat storage material at a bottom portion of the heat storage container. By providing a graphite layer having an orientation on the bottom surface side of the iron base, the heat storage iron suppresses the temperature decrease of the iron base.

A twelfth means of achieving the twelfth object of the present invention is to provide a heater having a graphite layer with a distance from the bottom surface of the iron base of the iron base when the heat storage device is incorporated in the iron base. The heat storage iron is provided at the same distance and at the center between the terminals of the heater.

The thirteenth means of the present invention for attaining the thirteenth object is, when a heat storage device is incorporated in an iron base, directly below a steam vaporizing chamber provided in the iron base or the heat storage device. Is a heat storage iron whose upper surface is a part of the steam vaporization chamber.

[0019]

The first means of the present invention is to store a heat storage material in a metal container having a high thermal conductivity and to act as a heat storage device capable of maximally utilizing the heat storage energy of the heat storage material.

The second means of the present invention is to store the heat storage material and the high thermal conductivity material at the same time in a container made of a metal having a high heat conductivity to maximize the heat conductivity in the container. It functions as a device.

A third means of the present invention is to accommodate a heat storage material and a high thermal conductivity material in a metal container having a high thermal conductivity at the same time to maximize the thermal conductivity in the container. In addition, the heat storage device is capable of effectively storing the heat from the heater through the highly oriented graphite having high thermal conductivity.

The fourth means of the present invention always includes a eutectic composition alloy in which Sn: Bi is 42:58 (wt%) as the composition of the heat storage material, Sn is 37 to 47 wt%, and Bi is 5 wt%.
It functions as a heat storage device that uses the solidification heat of an alloy having a composition range of 3 to 63% by weight as heat storage.

The fifth means of the present invention always includes a eutectic composition alloy in which Sn: Pb is 63:37 (wt%) as the composition of the heat storage material, Sn is 58 to 68 wt%, and Pb is 3 wt%.
It functions as a heat storage device that uses the solidification heat of the alloy within the composition range of 2 to 42 wt% as heat storage.

A sixth means of the present invention always includes a eutectic composition alloy containing 91: 9 (wt%) of Sn: Zn as the composition of the heat storage material, where Sn is 86 to 96 wt% and Zn is 4 wt%. ~
It functions as a heat storage device that uses the solidification heat of the alloy within the composition range of 14% by weight as heat storage.

The seventh means of the present invention is to use a foam metal or a honeycomb metal as a high heat conductive material in order to enhance heat conduction in the container, and to fill the foam portion of the metal or the space portion of the honeycomb with the heat storage material. As a result, it functions as a heat storage device that maximizes heat conduction in the container.

The eighth means of the present invention accommodates the heat storage material and the high thermal conductive material in a metal container so that maximum heat conduction can be obtained in the container, and a high temperature is provided at the bottom of the heat storage container. By arranging the ab plane of the crystal of the graphite layer having the orientation, that is, the crystal plane of the graphite crystal having the highest thermal conductivity in parallel with the bottom of the heat storage container, the heat from the heater can be effectively propagated to the heat storage device. Acting as a device.

The ninth means of the present invention is to bring the heat storage device and the iron base into close contact with each other on the bottom surface side of the iron base side,
In particular, it acts as a heat storage iron that suppresses a decrease in iron base temperature.

According to a tenth means of the present invention, when the heat storage device is incorporated into the iron base, the center of the heat storage device in the height direction is the same distance from the bottom surface of the iron base of the heater of the iron base, and The heater is arranged so as to be the center between the heater terminals, and acts as a heat storage iron capable of maximally utilizing heat conduction from the heater to the heat storage device.

According to an eleventh means of the present invention, a heat storage material and a high thermal conductivity material are contained in a metal container, and a graphite layer having a high orientation is provided on the bottom of the heat storage container. On the side, the heat storage material acts as a heat storage iron that suppresses the temperature drop of the iron base.

In a twelfth means of the present invention, in consideration of the position of the heat storage device from the heater in the iron base and the heat radiation to the iron base, the bottom face of the heat storage device having highly oriented graphite on the bottom face side is used as the heater. The heat storage iron is configured to have the same distance as the distance from the bottom surface of the iron base and to be the center between the terminals of the heater, and optimally designed to absorb heat from the heater and dissipate heat to the iron base.

A thirteenth means of the present invention is arranged such that the heat storage device is directly below a steam vaporization chamber provided on an iron base or an upper surface of the heat storage device is a part of the steam vaporization chamber.
The heat storage device acts as a heat storage iron that suppresses a rapid temperature drop of the iron base due to latent heat of vaporization of water.

[0032]

EXAMPLES Examples of the present invention will be described below. FIG.
[Fig. 4] is an explanatory view showing a cross section of an iron base. The iron base 1 has a heater 2 for heating the iron base 1.
Steam vaporization chamber 3 for generating steam and heat storage device 4
Are provided.

As shown in FIG. 2, the heat storage device 4 contains a heat storage material 6 and a high thermal conductivity material 7 inside a metal heat storage container 5, and has a graphite layer 8 on the bottom surface. . In this embodiment, aluminum is used as the heat storage container 5 in order to avoid a chemical reaction with the heat storage material 6 and the high thermal conductivity material 7 contained therein.

As the heat storage material 6, the alloys shown in Table 1 are used.

[0035]

[Table 1]

As the high thermal conductivity material 7, a foam metal or a metal having a honeycomb-shaped space portion is used. The heat storage material 6 is formed integrally with the high thermal conductivity material in a form of filling the space of these metals.

The graphite layer 8 is made of a highly oriented one in which the crystal orientation directions are uniform. In this embodiment, the highly oriented graphite layer is formed by firing a film of a polymer compound such as polyimide or polyamide in a temperature range of 2000 ° C. or higher, preferably around 3000 ° C.
The graphite film thus prepared has a crystalline a
The b-plane, that is, the plane in which carbon atoms form a hexagonal lattice, is oriented perpendicular to the thickness direction of the film.
By the way, the lattice constant of graphite crystal is a = b = 2.456
Å (perpendicular to the film thickness direction), c = 6.696Å (parallel to the film thickness direction). The calcination is usually performed in an inert gas such as nitrogen gas. In order to suppress the influence of gas generated in the process of graphitization by firing, it is desirable that the film of the polymer compound has a thickness of 5 μm or more. For example, in the case of highly flexible graphite with inflexibility obtained by firing aromatic polyimide, the density is
It is light at 2.25 g / cm ³ (2.70 for Al) and has a thermal conductivity of 860 kcal / m · hr · ° C (4.4 times that of Al, in the ab plane direction of the crystal).
(2.5 times that of Cu), 4.3 kcal / m in the c-axis direction of the crystal
-Hr · ° C (2/100 times Al and 1/100 times Cu).

In this embodiment, the graphite layer 8 thus formed is provided so that the ab plane of the crystal is parallel to the bottom of the heat storage container 5. That is, the thermal conductivity in the horizontal direction is extremely improved.

The heat storage device 4 constructed as described above is shown in FIG.
It is used by mounting it on the iron base 1 as shown in FIG.

The operation of this embodiment will be described below. When the heat storage material 6 is an alloy of Sn and Bi shown in 1 of Table 1, the heat storage characteristics of this alloy are as shown in the state diagram shown in FIG. That is, when Sn: Bi is 42:58 (wt%), the eutectic composition exhibits a uniform liquid phase in a temperature range higher than 139 ° C and a uniform solid phase below 139 ° C. In the eutectic composition, when cooled from the molten state, the liquid phase directly changes to the solid phase without passing through the coexisting state of the liquid phase and the solid phase. Therefore, it does not cause segregation and has a constant freezing point and a constant heat of solidification even when the temperature is repeatedly raised and lowered. That is, it has a characteristic of having a constant amount of heat storage.
In addition, Sn: 37 to 47 wt% including the eutectic composition,
Regarding the entire heat storage material having Bi: 53 to 63% by weight, segregation during solidification is small, and stable heat of solidification, that is, heat storage is obtained. The heat storage amount is 10-11cal /
It is g.

Also, when the alloy of Sn and Pb shown in 2 of Table 1 is used as the heat storage material 6, the heat storage amount is 10 to 11 cal / g. .
As shown in FIG. 4, when Sn: Pb is 63:37 (wt%), a uniform liquid phase is obtained in a temperature range higher than 183 ° C., and a uniform solid phase is obtained in a temperature range lower than 183 ° C. Is a eutectic composition. Including this eutectic composition,
An alloy having a composition of Sn: 58 to 68 wt% and Pb: 32 to 42 wt% has, for example, 58 wt% Sn and 4 Pb.
At 2% by weight, the liquid phase is uniform in the temperature range higher than 200 ° C, the liquid phase and the solid phase coexist in the temperature range from 200 ° C to 183 ° C, and becomes the solid phase below 183 ° C. The composition.

The heat storage material was subjected to a temperature cycle test in which the temperature was raised and lowered, and as a result, Sn was 58 to 68.
Within the composition range of 32 to 42 wt% of Pb and Pb (including eutectic), segregation during solidification was small and stable heat of solidification, that is, heat storage could be obtained. The heat storage amount is 10 to 11
It was cal / g.

Further, when the alloy of Sn and Zn shown in 3 of Table 1 is used as the heat storage material 6, the heat storage amount is 19 to 20 cal / g. .
FIG. 5 shows a state diagram of the Sn—Zn system used in this example. The Sn: Zn content of 91: 9 (% by weight) has a eutectic composition showing a uniform liquid phase in a temperature range higher than 198 ° C and a uniform solid phase below 198 ° C. In the present embodiment, Sn containing this eutectic composition: 86 to 96% by weight,
Zn: An alloy having a composition of 4 to 14% by weight is used. For example, if Sn is 87% by weight and Zn is 13% by weight,
It has a uniform liquid phase in the temperature range above ℃,
In the temperature range of 98 ° C, the liquid phase and the solid phase coexist.
Solid below 8 ℃.

The heat storage material was subjected to a temperature cycle test in which the temperature was repeatedly raised and lowered, and as a result, stable solidification heat, that is, heat storage with less segregation during solidification was obtained. At this time, as described above, the heat storage amount was 19 to 20 cal / g.

In this embodiment, the heat storage device 4 is brought into close contact with the bottom surface side of the iron base 1. Further, the heat storage device 4 is provided directly below the steam vaporization chamber 3 provided in the iron base 1, and the upper surface of the heat storage device 4 constitutes a part of the steam vaporization chamber 3. Therefore, the heat released from the heat storage device 4, which stores the heat generated by the heater 2, can be radiated to a position near the ironing operation surface of the iron base 1, and the amount of heat taken by the clothes to be ironed can be effectively replenished. It is a thing. That is, a heat storage iron that suppresses a decrease in the base temperature is realized.

FIG. 6 is a characteristic diagram showing the temperature change of the iron base 1 in the state of being used with steam.
When used by steaming, the water dropped in the vaporization chamber 3 deprives the iron base 1 of the latent heat of vaporization of 539 cal / g. Therefore, the temperature of the iron base 1 decreases as shown in FIG. At this time, in the present embodiment, the heat storage device 4 is arranged so as to be directly below the steam vaporization chamber 3, or the upper surface of the heat storage device 4 is arranged as a part of the steam vaporization chamber 3, so that the solid line in FIG. It changes as shown in. That is, the temperature drops after the amount of heat storage is released near the freezing point of the heat storage material 6. Maintaining the temperature of the iron base 1 by radiating the heat storage material 6
It is about 30 seconds to 1 minute when steaming is used. At this time, when the type of the heat storage material 6 used in the heat storage device 4 is set to 1 shown in Table 1, the heat storage temperature is 139 ° C., which is suitable for a low temperature heat storage iron. There is. 2 in Table 1
When the one shown in is used, the heat storage temperature is 183
The temperature is ℃ and it is suitable for medium temperature heat storage iron. Further, when the one shown in 3 of Table 1 is used, the heat storage temperature is 198 ° C, which is suitable for a high temperature heat storage iron.

The dotted line shows the temperature change when the heat storage device 4 of this embodiment is not provided.

At this time, in this embodiment, as shown in FIG. 1, the graphite layer 8 constituting the heat storage device 4 is
The heater 2 is provided at the same distance from the bottom surface of the iron base 1 as the center between the terminals of the heater 2. The graphite layer 8 is highly oriented graphite and is provided such that the ab plane direction of the crystal is parallel to the bottom of the heat storage container. Therefore, since the thermal conductivity of the graphite layer 8 in the ab plane direction is 860 kcal / m · hr · ° C, which is very high, 4.4 times that of Al and 2.5 times that of Cu, the heat storage device 4 generates heat from the heater 2. It is transferred very efficiently and can store heat in a short time.

Further, as shown in FIG. 7, the arrangement of the heat storage device 4 is such that the center in the height direction is on the same plane as the heater 2, that is, the center in the height direction is the same distance from the bottom surface of the base. When it is set so as to be the center between the terminals of the heater 2, the optimum balance between the heat absorption of the heat storage device 4 from the heater 2 and the heat radiation from the heat storage device 4 to the iron base 1 is achieved. Is.

In this embodiment, as shown in FIG. 2, the heat storage device 4 contains a heat storage material 6 and a high thermal conductivity material 7 in a metal container 5 having a graphite layer 8 on the bottom surface. However, as shown in FIG. 8, the heat storage material 6 is simply contained in the metal container 5, or as shown in FIG. The object of the present invention can be achieved even if the heat storage material 6 and the high thermal conductivity material 7 are only housed in the structure.

[0051]

The first means of the present invention is to realize a heat storage device capable of effectively transferring the amount of heat stored in the heat storage material to the outside, as a structure in which the heat storage material is housed in a metal heat storage container. .

A second means of the present invention is a heat storage device in which a heat storage material and a high thermal conductivity material are housed in a metal heat storage container so that the thermal conductivity in the container housing the heat storage material is enhanced. Is realized.

A third means of the present invention is such that a heat storage material and a high thermal conductivity material are housed inside a metal heat storage container, and a graphite layer having high orientation is adhered to the bottom of the heat storage container. The present invention realizes a heat storage device that enhances heat conduction from a heater to a heat storage unit when used for an iron.

The fourth means of the present invention, in particular, always contains a eutectic composition alloy having a heat storage material of Sn: Bi of 42:58 (wt%), Sn of 37 to 47 wt%, and Bi of 53.
As an alloy having a composition range of up to 63% by weight, the present invention realizes a heat storage device that can effectively use the amount of heat when the heat storage material changes from a liquid phase to a solid state as the amount of heat storage.

The fifth means of the present invention is, in particular, to use a heat storage material,
A eutectic composition alloy in which Sn: Pb is 63:37 (% by weight) is always included, 58 to 68% by weight of Sn and 32 to 4 of Pb.
As a configuration of an alloy having a composition range of 2% by weight, a heat storage device that can effectively use the amount of heat when the heat storage material changes from a liquid phase to a solid state as the amount of heat storage is realized.

The sixth means of the present invention is to use a heat storage material,
An eutectic composition alloy containing Sn: Zn 91: 9 (wt%) is always included, and Sn is 86 to 96 wt% and Zn is 4 to 14 wt% in the composition range. The present invention realizes a heat storage device that can effectively use the amount of heat when the state changes from solid state to solid phase as the amount of stored heat.

The seventh means of the present invention is a structure in which a foam metal or a metal having a honeycomb-shaped space portion is used as a material having a high thermal conductivity, and in particular, the thermal conductivity inside the container is increased to the outside. It is intended to realize a heat storage device having good thermal conductivity.

The eighth means of the present invention has a structure in which the ab plane of highly oriented graphite crystals is arranged in parallel with the bottom of the heat storage container, so that the heat transfer from the heater to the heat storage part when used in an iron is performed. This is to realize a further enhanced heat storage device.

The ninth means of the present invention improves the thermal conductivity from the heat storage device by incorporating the heat storage device on the bottom side of the iron base when the heat storage device is incorporated into the iron base. This is to realize a convenient heat storage iron that can suppress the temperature drop of the iron base.

The tenth means of the present invention is provided such that the center in the height direction of the heat storage device is the same distance from the base bottom surface of the heater of the iron base and the center of the terminals of the heater. With such a structure, a heat storage iron in which heat absorption from the heater and heat dissipation to the iron base are appropriately realized is realized.

The eleventh means of the present invention is a heat accumulating iron capable of suppressing the temperature decrease of the iron base, in particular, in which the graphite layer constituting the heat accumulating device is on the bottom side of the iron base. is there.

A twelfth means of the present invention is such that the graphite layer constituting the heat storage device is at the same distance from the iron base bottom surface of the heater of the iron base and at the center between the terminals of the heater. As the configuration provided,
The present invention realizes a heat storage iron that more appropriately absorbs heat from the heater and dissipates heat to the iron base.

The thirteenth means of the present invention is such that the heat storage device constituting each of the above means is directly below the steam vaporization chamber provided in the iron base, or the upper surface of the heat storage device is a part of the steam vaporization chamber. As a configuration incorporated in an iron base, a heat storage iron capable of suppressing a temperature decrease of the iron base is realized.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a configuration of a heat storage iron that is an embodiment of the present invention.

FIG. 2 is an explanatory view explaining the configuration of the heat storage device.

FIG. 3 is a state diagram of the Sn—Bi alloy used as the heat storage material.

FIG. 4 is a state diagram of the Sn—Pb alloy used as the heat storage material.

FIG. 5 is a state diagram of Zn-Sn alloy used as a heat storage material.

FIG. 6 is a characteristic diagram showing a temperature change of the iron base.

FIG. 7 is an explanatory diagram illustrating a configuration of a heat storage iron in which the built-in state of the heat storage device is changed.

FIG. 8 is an explanatory view explaining a state in which the configuration of the heat storage device is changed.

FIG. 9 is an explanatory diagram explaining a state in which the configuration of the heat storage device is changed.

[Explanation of symbols]

 1 Iron Base 2 Heater 3 Steam Vaporization Chamber 4 Heat Storage Device 5 Metal Container 6 Heat Storage Material 7 High Thermal Conductivity Material 8 Graphite Layer

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masao Shimizu 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Naomi Nishiki, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (13)

[Claims] 1. A heat storage device in which a heat storage material is contained in a metal heat storage container. 2. A heat storage device in which a heat storage material and a high thermal conductivity material are housed inside a metal heat storage container. 3. A heat storage device in which a heat storage material and a high thermal conductivity material are housed inside a metal heat storage container, and a graphite layer having high orientation is brought into close contact with the bottom of the heat storage container. 4. The heat storage material is Sn: Bi at 42:58.
Be sure to include the eutectic composition alloy (% by weight), Sn is 37
The heat storage device according to any one of claims 1 to 3, wherein the heat storage device has a composition range of 47 to 47% by weight and Bi of 53 to 63% by weight. 5. The heat storage material is Sn: Pb 63:37.
(Wt%) must contain eutectic alloy, Sn is 58
The heat storage device according to any one of claims 1 to 3, wherein the composition range is from 68 to 68% by weight and Pb is from 32 to 42% by weight. 6. The heat storage material is Sn: Zn 91: 9.
(Wt%) must contain eutectic composition alloy, Sn is 86
The heat storage device according to any one of claims 1 to 3, wherein the content of Zn is within the range of 96 wt% to Zn and the range of Zn is 4 to 14 wt%. 7. The heat storage device according to claim 2, wherein a foam metal or a metal having a honeycomb-shaped space portion is used as the high thermal conductivity material. 8. The heat storage device according to claim 3, wherein the ab plane of the highly oriented graphite crystals is arranged parallel to the bottom of the heat storage container. 9. A heat storage iron in which the heat storage device according to claim 1 or 2 is incorporated in an iron base, and the heat storage device and the iron base are in close contact with each other on the bottom surface side of the iron base. 10. The heat storage device according to claim 1 or 2 is incorporated in an iron base, and the center of the heat storage device in the height direction is the same as the distance from the base bottom surface of the heater of the iron base. And a heat storage iron provided so as to be the center between the terminals of the heater. 11. A heat storage iron in which the heat storage device according to claim 3 is incorporated into an iron base, and a graphite layer forming the heat storage device is provided on a bottom surface side of the iron base. 12. The heat storage device according to claim 3 is incorporated in an iron base, and the graphite layer forming the heat storage device is at the same distance from the bottom of the iron base of the heater included in the iron base. A heat storage iron provided so as to be centered between the terminals of the heater. 13. A structure in which the heat storage device according to any one of claims 1 to 3 is incorporated in an iron base,
A heat storage iron configured such that the heat storage device is directly below a steam vaporization chamber provided on an iron base or an upper surface of the heat storage device is a part of the steam vaporization chamber.