JPH11241482A - Heating tatami mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating tatami mat, in which heat transfer efficiency and surface-temperature distribution are improved by optimizing heat transfer from a heating element to a tatami facing while cushioning properties are also excellent. SOLUTION: In the heating tatami mat having a heating element 4 under a tatami facing 8 using a rush, a cushioning layer utilizing particle boards, etc., and the surface-shaped heat transfer layer 6 of aluminum foil are laminated between the heating element 4 and the tatami facing 8. Heat is transferred from the heating element 4 to the surface-shaped heat transfer layer 6 by a large number of intermediate heat transfer zones 9 using aluminum foil brought into surface-contact with the heating element 4 and the surface-shaped heat transfer layer 6 while being penetrated to a slit bored to the cushioning layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating tatami with a built-in heater spread between Japan and the like, and more particularly to a heating tatami in which the surface of a tatami mat can be uniformly heated by promoting heat transfer from a heating element. About.

[0002]

2. Description of the Related Art Conventionally, stoves and air conditioners that use electricity or gas have been widely used as indoor heating appliances, while floor heating has also become popular because it can be used safely without the need for ventilation or the like. . As the floor heating, tatami mats and electric carpets laid on the floor have been the mainstream, but recently heating tatami mats incorporating heaters or heat storage materials or blowing hot air have been used.

As the heating tatami mats, a heater is incorporated in a member that can also be used as a tatami mat to heat the tatami mat by heating the tatami mat member, and a room is provided by a blower with radiant heat of the tatami mat and blowing hot air at the same time. They are roughly divided into those that heat. An example of the former is a tatami described in Japanese Utility Model Laid-Open No. 1-278653, and an example of the latter is disclosed in Japanese Patent Laid-Open No. 4-3097.
There is a floor heating tatami described in JP-A-24.

[0004] The heating tatami with a built-in heater has a basic structure, for example, a tatami mat having a multi-layered structure including a planar heating element, including those described in the above-mentioned publication. That is, as in the case of ordinary tatami mats, in the case of wooden buildings, they are laid on floorboards arranged on joists, and in the case of reinforced concrete condominiums, they are laid on concrete slabs. A layer of cushioning material and a heating element is formed on the material, an auxiliary layer for heat insulation and heat retention is provided as necessary, and a tatami mat using rush is formed on the uppermost layer.

[0005] In such a heating tatami mat, the entire surface of the tatami mat is uniformly heated by a planar heater so that temperature unevenness does not occur, and the same tatami mat as a normal tatami mat without impairing appropriate softness. It is important in design to be able to obtain a feel. Then, in order to suppress the temperature unevenness of the tatami mat, heat from the heater may be evenly transferred to the tatami mat. To maintain appropriate softness, the thickness of the cushion material layer may be optimized.

As a device for promoting the heat transfer from the heater to the tatami mat, for example, as described in JP-A-7-252923, a highly heat-conductive member constituted by a combination of a heat receiving plate and a thin rod body is disclosed. Is sealed. Also,
Japanese Patent Laying-Open No. 7-238622 discloses a structure in which a member for attaching a tatami mat to a core material is stitched with a member using a highly heat-conductive ultrafine wire. That is, the members for heat transfer described in these publications are needle-shaped, and are disclosed in
In Japanese Patent Laid-Open No. 52923/1993, the needle portion is raised in the thickness direction of the tatami mat. In Japanese Patent Laid-Open No. 7-238662, the needle-like members are distributed like stitches.

[0007]

These heat transfer members are thin needle-like members which are distributed at many points to promote heat transfer. It is considered that the reason why the thin member is used is to prevent, for example, when a flat plate-shaped member is sealed so as to be included in the layer, the whole becomes hard and the cushioning property tends to be inferior.

However, from the viewpoint of heat transfer, a thin needle-shaped member has a limited heat capacity and can be developed only with a small heat transfer area. For this reason, unless a large number of heat transfer members are arranged, it is not possible to contribute to the promotion of heat transfer to the front side of the tatami mat. Since the heat transfer amount is smaller than that of the portion where the member is located, it may cause uneven temperature in the tatami mat.

[0009] Even for small needle-shaped members, hard members are used. Therefore, evenly distributing these members affects the overall hardness. In particular, JP-A-7-252
In Japanese Patent No. 923, the needle-shaped members are arranged in an upright position in the thickness direction, so that even if the cushioning material is included in the layer, these needle-shaped members make point contact. Therefore, the member comes to pierce into the cushion material, and the cushioning function of the cushion material is impaired.

[0010] As described above, in the conventional heating tatami mat, the heat transfer from the heater to the tatami mat surface is not sufficient, and the temperature tends to be uneven, and the heat transfer member affects the softness of the cushion material.

An object of the present invention is to provide a heating tatami that optimizes heat transfer from a heating element to a tatami surface, improves heat transfer efficiency and surface temperature distribution, and has excellent cushioning properties.

[0012]

SUMMARY OF THE INVENTION The present invention relates to a heating tatami including at least a heat insulating material, a heating element, and a tatami mat, and stacking these in order from the bottom. A buffer layer and a highly heat-conductive planar heat transfer layer are laminated in the same flat shape as the tatami mat, and the lower end is in surface contact with the upper surface of the heating element and the upper end is the lower surface of the planar heat transfer layer. And an intermediate condensate that comes into surface contact with the buffer layer.

[0013] In such a configuration, the intermediate tropical zone can be a large number of groups arranged in a spot pattern with a substantially uniform pattern over the entire surface of the heating element and the planar heat transfer layer.

The planar heat transfer layer and the intermediate heat transfer layer may be aluminum foil, and the intermediate heat transfer layer may be disposed in the buffer layer through slits cut vertically.

[0015]

1 is an external perspective view of a heating tatami mat according to the present invention, FIG. 2 is a partially cutaway perspective view showing a laminated structure, and FIG.
FIG. 3 is a sectional view taken along line AA of FIG.

In the figure, a heating tatami mat has a base cushion material 1, a lower particle board 2, a heat insulating material 3, a heating element 4,
It has a configuration in which an upper layer particle board 5, a planar heat transfer layer 6, a surface cushion material 7, and a tatami table 8 using rush are sequentially laminated. Note that the overall thickness is about 25 to 55 mm, and FIG. 1 shows the thickness direction exaggerated as compared to the actual thickness.

Base cushion material 1 and surface cushion material 7
Is made of a material which has water repellency and can be ventilated, and is preferably a material which can remove moisture and maintain the air permeability as a tatami mat.

The lower particle board 2 and the upper particle board 5 can be used also as cushions, and are formed by compressing sawdust. The upper layer particle board 5 constitutes a buffer layer in the present embodiment, and has a number of slits 5a vertically penetrating therethrough as shown in FIG. These slits 5a are shown in FIG.
As shown in an overall plan view in the direction of arrow B), they are arranged in a staggered pattern and cut straight in a direction parallel to the short side of the heating tatami mat.

The heat insulating material 3 is made of lightweight polystyrene foam which is easy to mold, and the heating element 4 has a conventionally known planar heating element structure. This planar heating element structure is provided with a heater so as to obtain a uniform heat generation from almost the entirety thereof, and a cord 4a is drawn out and provided with a controller 4b and an outlet 4c. In addition, tatami table 8
Is a weave of grass used for ordinary tatami mats, and a tatami rim 8a made of cloth is sewn to the edge of the long side.

The planar heat transfer layer 6 is made of an aluminum foil having a high thermal conductivity, and has a planar shape that overlaps the entire area of the lower upper particle board 5 and the upper surface cushion material 7. And the upper layer particle board 5
As shown in FIG. 3, the slit 5a is provided with an intermediate heat transfer zone 9 for transferring heat from the heating element 4 to the planar heat transfer layer 6. The intermediate heat transfer layer 9 uses aluminum foil similarly to the planar heat transfer layer 6, and is arranged so as to have a U-shaped cross section from the lower surface of the particle board 5 to the inside and the upper surface of the slit 5a. All the surfaces in contact with the particle board 5, including the inner surfaces of the slits 5a, are fixed by an adhesive.

The laminated members are superposed and fixed by applying an adhesive having a property not affected by heat between the members. In FIG. 3, a gap is formed between the planar heating layer 6 and the heating element 4 above and below the upper particle board 5 due to the thickness of the intermediate conductive layer 9. Is actually crushed and the layers of each member are tightly joined.

In the above configuration, the heat generated by energizing the heating element 4 is transferred from the upper particle board 5 stacked on the heating element 4 to the planar heat transfer layer 6. In this heat transfer, the amount of heat transferred to the planar heat transfer layer 6 is relatively small because the upper particle board 5 is a compression molded product of sawdust.

On the other hand, since the intermediate heat transfer layer 9 using aluminum foil is interposed between the surface heat transfer layer 6 and the surface heat transfer layer 6, the amount of heat transfer from the surface of the heating element 4 through the intermediate heat transfer layer 9 is as follows. The intermediate heat transfer layer 9 heats the planar heat transfer layer 6 in a spot-like manner. Then, by arranging the intermediate heat transfer zones 9 in a uniform pattern as shown in FIG. 4, the entire surface heat transfer layer 6 is almost uniformly heated.

Since the planar heat transfer layer 6 is made of aluminum foil, it has a high thermal conductivity, and even if the intermediate heat transfer layer 9 is in spot contact, the entire surface heat transfer layer 6 can be used. Heated uniformly. That is, when the heat from the heating element 4 is transferred to the planar heat transfer layer 6, the entire planar heat transfer layer 6 can have a substantially uniform temperature distribution. Therefore, even if it is necessary to cover the upper layer particle board 5 and the surface cushion material 7 in order to protect the heating element 4 itself from external force,
By arranging the planar heat transfer layer 6 using aluminum foil near the tatami table 8, the entire tatami table 8 can be uniformly heated. Thus, it is possible to prevent the surface temperature of the tatami mat 8 from being uneven, and to obtain a comfortable heating effect even when a person sits directly.

Further, as a member for promoting heat transfer, the intermediate heat transfer layer 9 using aluminum foil and the sheet heating layer 6 are used.
Are simply developed in a plane, so that the entire body is not hardened as compared with a case where a needle-like heat transfer member as shown in the conventional example is installed upright in the layer thickness direction. Therefore, the cushioning effect of the base cushion material 1 and the surface cushion material 7 is not impaired, and a comfortable sitting comfort is maintained.

[0026]

According to the first aspect of the present invention, even if a buffer layer for protecting the heating element from an external force is provided between the surface and the tatami mat, heat is transferred to the entire planar heat transfer layer through the intermediate heat transfer zone. So that the entire tatami surface is uniformly heated from this planar heat transfer layer,
A comfortable heating effect without uneven temperature can be obtained. In addition, since all the heat transfer members are in surface contact, there is no locally hardened portion as compared with the conventional structure in which a needle-like member is incorporated, and the cushioning property is not impaired.

According to the second aspect of the present invention, the occurrence of temperature unevenness on the tatami surface can be more effectively achieved by arranging the intermediate heat transfer layers in an optimum pattern such that the entire surface heat transfer layer is uniformly heated. Can be prevented.

According to the third aspect of the present invention, it is possible to form a heat transfer surface in surface contact with each of the heat generating element and the planar heat transfer layer simply by making a slit in the buffer layer and inserting the intermediate heat transfer layer of the aluminum foil into the slit. Therefore, the structure is simple and the assembly is easy.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a heating tatami mat of the present invention.

FIG. 2 is a schematic perspective view showing a laminated structure of a heating tatami according to the present invention, which is partially broken.

FIG. 3 is a longitudinal sectional view of a main part at a position viewed from arrows AA in FIG. 2;

FIG. 4 is a plan view showing an arrangement pattern of an intermediate tropical region with respect to the upper layer particle board at a position viewed from arrows BB in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base cushion material 2 Lower particle board 3 Heat insulating material 4 Heating element 5 Upper particle board (buffer layer) 5a Slit 6 Planar heat transfer layer 7 Surface cushion material 8 Tatami table 9 Middle transfer tropical

Claims (3)

[Claims] 1. A heating tatami including at least a heat insulating material, a heating element, and a tatami mat, and laminating these in order from the bottom, wherein a buffer layer and a high thermal conductivity are provided between layers between the heating element and the tatami mat. And a planar heat transfer layer having the same flat shape as the tatami surface, the lower end being in surface contact with the upper surface of the heating element and the upper end being in surface contact with the lower surface of the planar heat transfer layer. And a heating tatami mat provided through the buffer layer. 2. The heating tatami according to claim 1, wherein the intermediate heat transfer zone comprises a large number of groups arranged in spots in a substantially uniform pattern over the entire surface of the heating element and the planar heat transfer layer. 3. The planar heat transfer layer and the intermediate heat transfer layer are each made of aluminum foil, and the intermediate heat transfer layer is arranged through slits cut vertically in the buffer layer. Heating tatami.