JP3049828B2 - Electric floor heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric floor heater.

[0002]

2. Description of the Related Art A conventional electric floor heater of this type is shown in FIG.
As shown in FIG. 1, the main body 1 includes a heater 2 which is an electric resistance heating element, a steel plate forming an outer shell 3 of the main body, and a foam heat insulating plate 4 having closed cells for insulating the lower surface of the main body.
As shown in FIG. 3, the main body 1 is placed on a base material 9 of a building, a floor material 7 is placed on the main body 1, and the efficiency of heat transfer from the main body 1 to the floor material 7 is increased. The upper surface and the lower surface of the floor material 7 are brought into contact with each other and fixed to the auxiliary joist 8 with a nail or an adhesive to form a floor.

[0003]

In such a conventional electric floor heater, the upper surface of the main body 1 and the lower surface of the floor member 7 are in contact with each other in order to increase the efficiency of heat transfer from the main body 1 to the floor member 7. Foamed heat insulating plate 4 in which the heat insulating material on the lower surface of the main body has closed cells
Therefore, due to a temperature change due to a change in climate and a temperature change due to repetition of energization and stoppage of the main body 1, the gas in the closed cells of the foam insulation plate 4 repeats expansion and contraction.
When the gas expands, the thickness of the foamed heat insulating plate 4 is increased, the thickness of the main body 1 is increased, and the base material 9 on the lower side of the main body cannot be pushed down. The floor material 7 fixed to the auxiliary joist 8 is lifted. Further, when the gas is contracted, the thickness of the foamed heat insulating plate 4 becomes thinner and the thickness of the main body 1 is reduced, and a gap is generated between the upper surface of the main body 1 and the lower surface of the flooring 7. The heat transfer efficiency. And it caused floor noises when walking on the floor material 7. Further, in the conventional configuration, since there is no metal foil such as aluminum reflecting the radiant heat on the lower surface of the floor material 7, the radiant heat escapes to the lower surface of the main body.
The heat transfer efficiency from the main unit to the floor material was not good.

[0004] The present invention solves the above-mentioned problems, and prevents a decrease in heat transfer efficiency from the main body to the floor material by lifting the floor material and preventing a gap from being formed between the upper surface of the main body and the lower surface of the floor material. An object of the present invention is to prevent floor noises when walking on a flooring material and to improve heat transfer efficiency from the main body to the flooring material.

[0005]

According to the present invention, in order to achieve the above object, an electric floor heating apparatus according to the present invention comprises a steel plate constituting an outer shell of a main body and a heater disposed on a lower surface of the steel plate. A foamed heat insulating board having closed cells made of foamed polyethylene or the like that insulates the lower surface of the main body, a flexible heat insulating material such as felt bonded to an upper surface of the foamed heat insulating board, and reflection between the heat insulating board and the foamed heat insulating board. It is one with a plate interposed.

[0006]

According to the present invention, the gas in the closed cells of the foamed heat insulating plate of closed cells such as polyethylene foam expands, due to the temperature change due to the change of the weather and the temperature change due to the repetition of energization and stop of the main body. Repeat the contraction, the thickness of the foam insulation board increases when the gas expands,
A flexible heat insulating material such as a felt on the upper side of the foamed heat insulating plate is pushed up, the thickness of the heat insulating material is reduced, and when the gas is contracted, the thickness of the foamed heat insulating plate is reduced. Since the flexible insulating material such as the upper felt restores to the initial thickness and the thickness of the main body becomes constant,
Lifting the flooring material and preventing the gap between the upper surface of the main unit and the lower surface of the flooring material from occurring, without lowering the heat transfer efficiency from the main body to the flooring material, and preventing the floor noise when walking on the flooring material. it can. Further, since the reflection plate is interposed between the foam insulation plate and the heat insulation material, the reflection plate reflects the radiant heat to the lower surface of the main body, and can improve the efficiency of heat transfer from the main body to the floor material.

[0007]

1 and 2 show an embodiment of the present invention.
This will be described with reference to FIG. As shown in FIG. 1, reference numeral 1 denotes a main body. The main body 1 includes a heater 2 as an electric resistance heating element, a steel plate forming an outer shell 3 of the main body, and a foamed polyethylene for heat insulation on the lower surface of the main body. The foamed heat insulating plate 4 having closed cells and the felt 5 as a heat insulating material having flexibility provided thereon are composed of two layers of heat insulating material. The reflection plate 6 made of foil is interposed and bonded. As described above, according to the electric floor heating appliance of the embodiment of the present invention, the heat insulating material on the lower surface of the main body is made of a felt as a heat insulating material having flexibility in the thickness direction with the foam heat insulating plate 4 having closed cells of the foamed polyethylene. 5 is used as the heat insulating material, so that the resilience of the felt 5 prevents the floor material 7 from being lifted and the gap between the upper surface of the main body 1 and the lower surface of the floor material 7 from being generated. Without lowering the heat transfer efficiency and preventing floor noise when walking on the floor. Since the reflecting plate 6 made of aluminum foil is adhered to the upper surface of the foam insulating plate 4, the radiant heat to the lower surface of the main body 1 is reflected, and the heat transfer efficiency from the upper surface of the main body 1 to the lower surface of the flooring material is improved. be able to.

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 2 is different from the above-described embodiment in that the reflecting plate 7 made of aluminum foil is adhered to the upper surface of the felt 5 which is a heat insulating material having flexibility. The dimensional change of the felt 5 in the horizontal direction can be suppressed.

[0009]

As is clear from the above embodiments, the electric floor heater of the present invention has the following effects.

(1) Since the heat insulating material on the lower surface of the main body is composed of a two-layered heat insulating material composed of a foamed heat insulating plate having closed cells and a flexible heat insulating material provided on the upper side thereof, the heat insulating material may be affected by changes in climate. Touching the top surface of the main unit caused by temperature changes and temperature changes due to repeated energization and stop of the main unit,
Lifting of the floor material fixed to the auxiliary joists and preventing the formation of a gap between the upper surface of the main body and the lower surface of the floor material, without lowering the heat transfer efficiency from the main body to the floor material, and The floor can be prevented from sounding when walking.

(2) Since the reflector is interposed between the heat insulating plate having closed cells and the heat insulating material on the heat insulating plate, it reflects the radiant heat to the lower surface of the main body and reduces the heat generation efficiency to the upper surface of the main body. Can be improved.

(3) Since the reflector is interposed between the flexible heat insulating material such as felt and the heater on the lower surface of the steel plate, the dimensional change of the heat insulating material in the horizontal direction can be suppressed.

[Brief description of the drawings]

FIG. 1 is a sectional view of an electric floor heater according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an electric floor heater according to another embodiment of the present invention.

FIG. 3 is a construction drawing of the electric floor heating device of the present invention.

FIG. 4 is a sectional view of a conventional technique.

[Description of Signs] 1 Main body 2 Heater 4 Foamed heat insulating plate 5 Heat insulating material 6 Reflector

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-53-76459 (JP, A) JP-A-3-24851 (JP, U) JP-A 62-108715 (JP, U) JP-A 57- 200818 (JP, U) Japanese Utility Model Showa 50-105648 (JP, U) Japanese Utility Model Showa 56-139993 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24D 13/02

Claims (2)

(57) [Claims] 1. A steel plate forming an outer shell of a main body, a heat disposed on a lower surface of the steel plate, a foamed heat insulating plate having closed cells of foamed polyethylene or the like for heat insulation of a lower surface of the main body; An electric floor heater comprising a flexible heat insulating material such as felt provided on the upper surface of a plate, and a reflecting plate interposed between the heat insulating material and the foamed heat insulating plate. 2. A foamed heat insulating plate having a steel plate constituting an outer shell of a main body, heat disposed on a lower surface of the steel plate, and closed cells of foamed polyethylene or the like for heat insulation of a lower surface of the main body; A heat insulating material having flexibility such as felt provided on an upper surface of a plate, and a reflecting plate interposed between a flexible heat insulating material such as the felt and a heater disposed on a lower surface of the steel plate. Floor heating appliances.