JPH02247452A - Electric foot warmer - Google Patents

Abstract

PURPOSE:To eliminate inside odor by installing an insulator around an electric resistance heat generating body, a heat resistant porous layer around its outer periphery, which supports a platinum-based catalyst for an electric heat generating body. CONSTITUTION:When electric power is supplied to an electric resistance heat generating body 12, an insulator 13 provided around the heating element is subjected to high temperature. A heat resistant porous layer 14, which supports platinum-based catalyst 15, is provided around the outside of the insulator 13, which subjects the heat resistant porous layer 14 to high temperature as well and raises the temperature of the platinum-based catalyst 15 up to active temperature. The air, which circulates inside a 'kotatsu' or foot warmer by a centrifugal fan 8, is brought into contact with the platinum-based catalyst 15 when it is passing through the electric heating element 10 so that the catalyst 15 is raised up to the satisfactory active temperature which allows catalysis to be exerted. Therefore, the air which contains the odor inside the foot warmer is cleaned by the catalysis so that the odor may be eliminated. It is, therefore, possible to use the foot warmer for a long time, eliminating body smell from the inside of the foot warmer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a kotatsu using an electric heating element.

2. Description of the Related Art A conventional electric kotatsu, as shown in Fig. 5, has a top plate 1 and legs 2 forming a tower, and an electric heating element 3 attached to the bottom side of the top plate 1 that heats the inside of the kotatsu by radiation. It is.

A reflector plate 4 is provided between the top plate 1 and the electric heating element 3 to reflect radiation to the top plate 1 to provide efficient heating.

Furthermore, since there is almost no convection inside the kotatsu,
A blower 5 is provided near the top plate 1 for the purpose of circulating the air inside the kotatsu to prevent hot air from being trapped near the top plate 1.

Problems to be Solved by the Invention These conventional electric kotatsu have had the following problems.

If you use a kotatsu for a long time, the smell of human body odor and sweat will accumulate inside the kotatsu. This odor rides on the circulation flow generated by the blower and is heated by an electric heating element. Generally, the higher the temperature, the stronger the odor is perceived by the human nose. Therefore, the kotatsu not only heats people, but also heats up the odor trapped inside the kotatsu, making the odor even stronger.

For this reason, when I opened the kotatsu futon to enter the kotatsu,
The problem is that the air inside the kotatsu rides on the rising air and is released outside, creating a bad odor.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides an electric kotatsu that has a simple structure and can remove internal odors.

Means for solving the problem A top plate, legs, a centrifugal fan that sucks in air from below and discharges it horizontally, an electric heating section installed downstream of the centrifugal fan,
In an electric kotatsu equipped with an electric heating part and a heat shield plate provided between the top plate and covering the electric heating part from above, the electric heating part has an insulator provided around the electric resistance heating element and an insulator. A heat-resistant porous layer provided on the outer periphery of the porous! It is characterized by comprising a platinum group catalyst supported by the layer.

For production The effect of this technical means is as follows.

An insulator is provided around the electric resistance heating element, a heat-resistant porous layer is provided around the outer periphery of the insulator, and a platinum group catalyst is supported on the porous layer, so the electric resistance heating element heats the object to be heated. At the same time, the insulator will also be heated. For this reason, the heat-resistant porous layer provided on the outer periphery of the insulator and supporting a platinum group catalyst also becomes high temperature. On the other hand, since the electric heating part is installed downstream of the centrifugal fan installed to prevent heat from accumulating near the top plate, when the air inside the kotatsu circulated by the centrifugal fan passes through the electric heating part, It comes into contact with a high-temperature porous layer supporting a platinum group catalyst, and is purified by catalytic action.
Odors are removed.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

In Figure 1, the top plate 6 and legs 7 form a tower,
A centrifugal fan 8 is provided at the center of the lower surface of the top plate 6. The centrifugal fan 8 sucks the air inside the kotatsu through a suction port in its center and discharges it horizontally, thereby generating a circulating flow 9 inside the kotatsu and preventing heat from accumulating near the top plate 6. ing. An electric heating section 1 is located downstream of this circulating flow 9.
Set 0.

Further, between the electric heating section 10 and the top plate 6, the electric heating section 1
A heat shield plate 11 is provided to cover the top plate θ from above, and reflects the radiant heat from the electric heating unit 10 and returns it to the object to be heated, and prevents the temperature of the top plate θ from rising.

As shown in FIG. 2, the electric heating unit 10 includes an electric resistance heating element 12, an insulator 13 provided around the electric resistance heating element 12, and a heat-resistant porous layer 14 provided around the outer periphery of the insulating weight 3. , and a platinum group catalyst 15 supported by a porous layer I4.

In addition, in order to provide the electric heating section IO downstream of the circulating flow 9 generated by the centrifugal fan 8, as shown in FIG. 3, the electric heating section 10 may be provided in parallel on both sides of the centrifugal fan 8. As shown in FIG. 4, an electric heating section 1G may be provided to surround the centrifugal fan 8.

In the above configuration, when the electric resistance heating element 12 is energized, the electric resistance heating element 12 heats the object to be heated, and
To heat the insulator 13 provided around the electric resistance heating element 12, the insulator! 3 becomes high temperature.

Since the heat-resistant porous layer 14 supporting the platinum group catalyst 15 is provided on the outer periphery of the insulator 13, the heat-resistant porous layer 14 also becomes high temperature. For this purpose, the temperature of the platinum group catalyst 15 can be raised to the activation temperature.

On the other hand, there is an electric heating section downstream of the circulating flow 9 generated by the centrifugal fan 8! O is provided, so that the air inside the kotatsu that is circulated by the centrifugal fan 8 comes into contact with the platinum group catalyst 15 when passing through the electric heating section 10. At this time, the platinum group catalyst 15 is heated by the electric resistance heating element 12 to an activation temperature sufficient to exhibit catalytic action. Therefore, when the odor-laden air inside the kotatsu passes through the porous layer 14, it passes through the platinum group catalyst! It is purified by the catalytic action of step 5 and odor is removed.

Therefore, even if the kotatsu is used for a long period of time, the smell of human body odor and sweat will not be trapped inside the kotatsu, and even if the kotatsu futon is opened to enter the kotatsu, there will be no smelly smell.

Effects of the Invention As described above, in the present invention, the odor-laden air inside the kotatsu can be oxidized by the catalytic action, and the odor can be removed. Therefore, even if the kotatsu is used for a long time, the smell of human body odor and sweat will not be trapped inside the kotatsu, and even if the kotatsu futon is opened to enter the kotatsu, there will be no bad odor.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electric kotatsu in an embodiment of the present invention.
FIG. 2 is a detailed sectional view of the electric heating part of the electric kotatsu, FIGS. 3 and 4 are bottom views showing examples of the arrangement of the electric heating part, and FIG. 5 is a sectional view of the conventional electric kotatsu. 6... Top plate, 8... Centrifugal fan, IO... Electric heating unit, 12... Electric resistance heating element, 13... Insulator,
14... Heat-resistant porous layer, 15... Platinum group catalyst. Name of agent: Patent attorney Shigetaka Awano Haka1 to 1 Figure

Claims (1)

[Claims] A top plate, a leg, a centrifugal fan that sucks wind from below and discharges it horizontally, an electric heating section provided downstream of the centrifugal fan, and an electric heating section arranged upward between the electric heating section and the top plate. In the electric kotatsu, the electric heating section includes an insulator provided around an electric resistance heating element, and a heat-resistant porous layer provided around the outer periphery of the insulator. An electric kettle characterized by comprising a platinum group catalyst supported by the porous layer.