JPH114846A - Portable heat reserving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To house a heat accumulating material without looseness, and enhance portability by housing the heat accumulating material heated by being warmed by irradiation of a microwave in a vessel having heat radiating holes by imparting clearances between the heat accumulating material and the vessel, and arranging resilient clearance holding members in its clearance. SOLUTION: A heat accumulating material 1 heated by being warmed by irradiation of a microwave is housed in a vessel 2 constituted of an upper cover 10 and a lower cover 11 having heat radiating holes by imparting clearances S1 and S2 between the heat accumulating material 1 and the vessel 2, and a heat reserving device is constituted. The heat accumulating material 1 is constituted by housing a heat accumulating medium 3 inside a sealing body 4 formed of polymethyl pentene, and the heat accumulating medium 3 contains, for example, polyethylene glycol(PEG), and is heated by irradiation of a microwave in a microwave oven. Clearance holding members 8 having a hollow cylindrical shape or the like which function as a shock absorbing material and are composed of a resilient material such as slicone rubber, are interposed in the clearance S1 between the upper cover 10 and the heat accumulating material 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable warming device which is used, for example, in a microwave oven which is useful as a portable warmer, and more particularly to suppressing rattle of a heat storage material contained in a container. The present invention relates to a portable heat retaining device which is excellent in portability.

[0002]

2. Description of the Related Art For example, Japanese Utility Model Publication No. 308430 discloses a heat insulator with a cover case in which a heat storage material that generates heat by being heated by a microwave oven is stored in the cover case. Have been.
Such a warmer with a cover case has the convenience that it can be easily used as a warmer such as a hot water bottle simply by warming the heat storage material together with the container in a microwave oven.

Meanwhile, in the above-described heat retaining device with a cover case, a gap is provided between the heat storage material and the cover case in order to radiate the heat of the heated heat storage material to the outside of the container. However, when the above-described heat retaining device with a cover case is used as a portable warmer, if there is a gap between the heat storage material and the cover case, the heat storage material will rattle in the container, impairing portability. In addition, since the above-described heat retaining device with a cover case is intended to be used as a hot water bottle, portability has not been considered at all.

[0004] Accordingly, it is an object of the present invention to provide a portable warming device that is excellent in portability and can accommodate a heat storage material in a container without rattling.

[0005]

According to the first aspect of the present invention, a heat storage material that is heated by microwave irradiation and generates heat is provided in a container having a heat radiation hole formed between the heat storage material and the container. The above object has been attained by providing a portable heat retaining device, wherein a portable heat retaining device is provided in which a gap holding member having elasticity is provided in the gap. It was done.

According to a second aspect of the present invention, in the portable warming apparatus according to the first aspect, the gap holding member is provided in the gap on the upper surface side and / or the lower surface side of the heat storage material. The above object has been achieved by providing a portable warming device characterized by the following.

[0007] The invention described in claim 3 is the first or second invention.
In the portable thermal insulation device according to the above, the gap holding member,
Silicon polymer, polypropylene, polyvinyl chloride,
The above object has been attained by providing a portable warming device characterized by being made of any of polyethylene.

According to a fourth aspect of the present invention, there is provided the portable warming device according to the first, second, or third aspect, wherein the gap holding member comprises a tube. The above object has been achieved.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. In this embodiment, the microwave is irradiated on the heat storage material by putting the whole container in a microwave oven, and the heat generated from the heated heat storage material is
This is an example of a portable warming device used as a so-called warmer.

FIG. 1 is a perspective view of a portable warming device of the present embodiment, FIG. 2 is an exploded perspective view of the portable warming device of the present embodiment,
3 is a cross-sectional view taken along line AA of the portable thermal insulation device shown in FIG. 1, FIG. 4 is a plan view of the heat storage material, FIG. 5 is a cross-sectional view of the heat storage material, FIG. FIG. 8 is a plan view of the lower cover viewed from the inside, and FIG. 8 is a plan view of the lower cover viewed from the inside.

As shown in FIGS. 1 to 3, the portable thermal insulation device according to the present embodiment comprises a heat storage material 1 which is heated by microwave irradiation to generate heat, and is provided with an upper lid 10 and a lower lid in which heat radiation holes are formed. The heat storage material 1 and the container 2 are accommodated in the container 2 having a space 11.

Further, the portable warming device of the present embodiment will be described in detail. As shown in FIGS. 2 and 3, the heat storage material 1 has a configuration in which the heat storage medium 3 is housed inside a sealed body 4 formed of polymethylpentene. The heat storage medium 3 contains, for example, polyethylene glycol (PEG), and generates heat when placed in a microwave oven and irradiated with microwaves. In the heat storage medium 3 of the present embodiment, the heat generation temperature is maintained at approximately 44 ° C. to 45 ° C.

The polyethylene glycol contained in the heat storage medium 3 preferably has a molecular weight of 800 to 10,000. When the molecular weight is less than 800, the freezing point is 30 ° C.
Since it solidifies at room temperature as low as below, it is not preferable for use as a portable warming device, and if it exceeds 10,000, the molecular weight distribution containing a large amount of low molecular weight components becomes broad and the amount of heat of fusion tends to decrease, which is sufficient. The above range is preferable because a sufficient heat retaining function cannot be exhibited.

In the present invention, two or more kinds of polyethylene glycols having different molecular weights may be mixed and used.
In particular, a mixture of 70 to 90% by weight of polyethylene glycol having an average molecular weight of 5,000 to 7000, more preferably about 6000, and 30 to 10% by weight of polyethylene glycol having an average molecular weight of 800 to 1500, particularly preferably about 1000, has a freezing point, melting point and melting point. Because it satisfies the physical properties required as a heat retention device such as heat quantity, heat storage medium hardness,
Most preferred as polyethylene glycol.

As the heat storage medium 3, only the above-mentioned polyethylene glycol can be used. However, if necessary, another known heat storage medium or an additive such as an antioxidant is added to the polyethylene glycol. Can also be used.

As shown in FIGS. 2 to 4, the sealing body 4 is formed as a disc-shaped bottle having a space enough to accommodate the heat storage medium 3 therein. The sealing body 4 has an injection port 5 through which the heat storage medium 3 is injected. The inlet 5 protrudes from a concave portion 6 formed in a part of the sealing body 4 as a low-height cylinder, and is sealed by a lid 7 after the heat storage medium 3 is injected.

The sealing member 4 is made of polymethylpentene. Such polymethylpentene is suitable for heating in a microwave oven because of its high-frequency permeability, and has a melting point of 230 to 240 ° C.
It is excellent in heat resistance, does not deteriorate even when the temperature of the heat storage medium 3 reaches 150 to 200 ° C., has excellent durability against repeated use, and further has a visible light transmittance of 90% and excellent transparency. The heating state of the heat storage medium 3 can be easily recognized.
Therefore, it is most suitable as a material for forming the sealing body 4.

As shown in FIG. 2, recesses 9 for positioning four gap holding members 8 to be described later are formed on the upper surface 4a of the sealing body 4. These recesses 9 are provided at positions where the gap holding members 8 are evenly arranged with respect to the sealing body 4. In the present embodiment, the recesses 9 are provided at positions that pass through the center of the sealing body 4 and divide the sealing body 4 into four parts.

As shown in FIG. 3 and FIG. 4, a first surface formed on an inner surface 11a of the lower lid 11 for positioning the heat storage material 1 with respect to the lower lid 11. A first annular concave portion 13 into which the annular convex portion 12 is fitted is formed. Outside the first annular recess 13 is formed a second annular recess 14 which is partially open. The second annular concave portion 14 is formed at a position facing the outermost heat radiation hole 15 among a plurality of heat radiation holes 15, 16, 17 formed in the lower lid 11 described later.

On the other hand, the container 2 has an upper lid 10 and a lower lid 11 which are made of a material such as polypropylene which is small enough to be carried, has impact resistance and is not affected by microwaves. . The upper lid 10 and the lower lid 11
As shown in FIG. 1 and FIG. 2, the heat storage material 1 is accommodated therein with gaps S1 and S2 between the heat storage material 1 and the upper lid 10 and the lower lid 11, respectively. The possible planar shape is formed as a so-called oval shape.

As shown in FIGS. 2 and 7, the upper cover 10 is provided with a plurality of heat-dissipating holes 18 each having a heart-shaped planar shape. The heat radiating holes 18 are provided in parallel near the front end and the rear end of the upper lid 10 so as to efficiently radiate the heat of the heated heat storage material 1 to the outside from the inside of the container 2. . A plurality of ribs 19 are formed on the inner surface 10a of the upper lid 10 as rectangular frames for positioning the respective gap holding members 8 described later. These ribs 19 are formed at positions facing the respective recesses 9 formed in the sealing body 4.

As shown in FIGS. 2 and 8, a large heart is provided at the center of the lower lid 11 in order to efficiently radiate the heat of the heated heat storage material 1 to the outside of the vessel 2 as shown in FIGS. A radiating hole 17 having a shape and radiating holes 15 and 16 having a plurality of arc shapes around the radiating hole 17 are formed. The inner surface 11a of the lower lid 11 has the first annular projection 1 described above.
2 are formed on the outer periphery of the heart-shaped heat radiation hole 17.

Further, on the inner surface 11a of the lower lid 11,
As shown in FIG. 3, the heat storage material 1 is
The second annular convex portion 20 for storing with holding
Are formed. As shown in FIGS. 3 and 8, the second annular convex portion 20 is configured to support a portion near the outer peripheral edge of the heat storage material 1 from below, and has an arc-shaped heat radiation hole provided at the outermost periphery. 15 is formed outside.

On the inner surface 11a of the lower lid 11, a plurality of positioning ribs 21 for determining the storage position of the heat storage material 1 in the container 2 are provided. These positioning ribs 21 are formed to protrude inward from the side wall portions at the front and rear and left and right portions so as to position the heat storage material 1 in the front and rear direction and the left and right direction.

As shown in FIG. 3, the heat storage material 1 stored in the container 2 having the above configuration is stored with gaps S1 and S2 between the container 2 and the heat storage material. In the gaps S1 and S2, the gap S1 between the upper lid 10 and the heat storage material 1 is provided with an elastic gap holding member 8 functioning as a cushioning material.

The gap holding member 8 is made of, for example, a silicone polymer such as silicone rubber, or a material having elasticity such as polypropylene, polyvinyl chloride, or polyethylene. The gap holding member 8 is shown in FIGS.
As shown in FIG. 5, the heat storage material 1 is formed in a tube on the upper surface 4a side of the heat storage material 1 in the gap S1. Specifically, it is provided between the concave portion 9 formed on the upper surface 4 a of the heat storage material 1 and the rib 19 formed on the inner surface 10 a of the upper lid 10. In the present embodiment, the gap holding member 8 is formed of a silicone polymer.

Before the heat storage material 1 is heated, the gap holding member 8 is slightly elastically deformed, as shown in FIG. It is urged with a pressing force. For this reason, the heat storage material 1 rattles in the container 2. Also, even if the heat storage material 1 is expanded by being heated by the microwave oven,
Is pressed against the lower lid 11 by the elastic force of the gap holding member 8. Therefore, the heat storage material 1 does not rattle in the container 2 not only in the state before the heating but also in the heated state.

As described above, the portable warming device to which the present invention is applied is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. In the present embodiment, the gap holding member 8 is provided only in the gap S1 on the upper surface side of the heat storage material 1, but the gap holding member 8 may be provided only in the gap S2 on the lower surface side of the heat storage material 1. Alternatively, the gap holding member 8 may be provided in any of the gaps S1 and S2 on the upper surface side and the lower surface side of the heat storage material 1.

Further, in this embodiment, a tube-shaped member is used as the gap holding member 8, but it is also possible to adopt a form as shown in FIGS. 9 to 12. When the gap holding member 8 is formed of a silicone polymer, for example, as shown in FIG.
Alternatively, as shown in FIGS. 7B and 7C, the shape is preferably a porous (sponge-like) cylindrical or spherical shape having a plurality of holes.

The gap holding member 8 is made of polypropylene,
When formed of polyvinyl chloride or polyethylene, the shape is preferably as shown in FIGS. FIG. 10A shows a wave shape, and FIG. 10B shows a shape in which two wave shapes are overlapped so that their peaks coincide. FIG. 11 shows a spiral shape. FIG. 12A shows a shape in which two leaf springs each having an arc shape are stacked in different directions, and FIG. 12B shows a shape in which three leaf springs having arc shapes having different lengths are stacked in the same direction. c) is a wave shape 3
The two leaf springs have an inverted Z-shape.

In the above embodiment, four gap holding members 8 are used. However, the number may be determined as needed. Also, the heat radiation holes 15, 16, 1 formed in the container 2
The shapes and the numbers of the layers 7 and 18 are not limited to the above-described embodiment, and may be determined in consideration of heat dissipation.

[0032]

As is apparent from the above description, according to the present invention, there is provided a portable heat retaining device excellent in portability, capable of storing a heat storage material in a container without rattling. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of a portable warming device of the present embodiment.

FIG. 2 is an exploded perspective view of the portable warming device of the present embodiment.

FIG. 3 is a cross-sectional view taken along line AA of the portable warming device shown in FIG.

FIG. 4 is a plan view of a heat storage material.

FIG. 5 is a sectional view of a heat storage material.

FIG. 6 is a sectional view of a cushioning material.

FIG. 7 is a plan view of the upper cover viewed from the inside.

FIG. 8 is a plan view of the lower cover viewed from the inside.

FIG. 9 is a perspective view showing another shape of the gap holding member.

FIG. 10 is a perspective view showing still another shape of the gap holding member.

FIG. 11 is a perspective view showing still another shape of the gap holding member.

FIG. 12 is a perspective view showing still another shape of the gap holding member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heat storage material 2 container 3 heat storage medium 4 sealed body 8 gap holding member 10 upper lid 11 lower lid

Claims (4)

[Claims] 1. A portable heat insulating material in which a heat storage material that is heated by microwave irradiation and generates heat is stored in a container having a heat radiation hole with a gap between the heat storage material and the container. An apparatus according to claim 1, wherein said gap is provided with a gap holding member having elasticity. 2. The portable heat retaining device according to claim 1, wherein the gap holding member is provided in the gap on an upper surface side and / or a lower surface side of the heat storage material. 3. The portable heat retaining device according to claim 1, wherein the gap holding member is made of any one of silicone polymer, polypropylene, polyvinyl chloride, and polyethylene. 4. The portable warming device according to claim 1, wherein the gap holding member is formed of a tube.