JPH01114631A - electric stove - Google Patents

Abstract

PURPOSE:To prevent the adhesion of cotton dust to porous part and get a beautiful glaring on the entire surface of a porous member by a method wherein a main body having an opened front surface is provided with a heater for radiating a radiation heat including a visual light, a reflection plate at a rear surface, and a porous member comprising a plurality of reflection cells at a front surface side and an aeration passage extending from a lower part of the main body to its upper part is formed. CONSTITUTION:Infra-red rays including a visible light radiated from a heater 6 partly advance along a cell of porous member comprised of a plurality of reflection cells and a part of it passes through the cells while being reflected against wall surfaces of the cells. Gas stream of natural convection flow generated by heat of the heater 6 flows into an air stream hole 10 at the bottom surface of a main body 5, a part of the air passes through a rear surface of the reflection plate 7 and the remaining air flows from an opening hole 8 of the reflection plate 7 into a spacing between the reflection plate 7 and the porous member 4, passes through an opening hole 9 and then flows out through the aeration hole 11. Since the porous member 4 has a larger pressure loss than that of the opening holes 8 and 9, a major flow of the natural convection flow flows out of the opening hole 9, resulting in that the cotton dust contained in the surrounding air is prevented from being adhered to the porous member 4 and so a beautiful glaring can be attained over the entire surface of the porous member.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric stove using a radiant heater that emits radiant heat including visible light.

BACKGROUND ART A conventional electric stove has a configuration shown in FIG. That is, a heater 2 is provided inside the main body 1, and a reflection plate 3 is provided on the back surface of the heater 2 to reflect radiant heat from the heater 2 to the front surface. Further, a honeycomb-shaped porous member 4 as shown in FIG. 2 is disposed on the front surface of the main body 1.

The porous member 4 is made by gluing together a large number of thin aluminum foils 4a to form a large number of hexagonal cells 4b, where b is the cell dimension and t
is called the thickness of the porous member 4.

When the heater 3 is energized, some of the infrared rays including visible light emitted from the high temperature radiant heater 3 go straight through the center/L'4b of the porous member 4, and some are reflected by the wall of the center/L'4b. From there, pass through Se/L'4b.

Therefore, the porous member 4 provided on the front surface of the heater 3 has the effect that the entire surface shines and gives a warm feeling.

Problems that the invention aims to solve However, with such conventional electric stoves, -
When the heater 2 is energized, the radiant heat from the heater 2 passes through the porous member 4 and is radiated forward. The airflow between the porous members 4 enters from below and exits from above, creating natural convection.

However, since electric heaters are used indoors where the air contains a lot of cotton dust, air containing fine dust passes through the cells of the porous member 4. In order to prevent the flow of cotton dust, it would be better to increase the cell width, but
In order to make the entire surface of the porous member 4 shine beautifully, it is necessary to form a large number of hexagonal cells 4b and provide many reflective surfaces. Therefore, the cell size ib is approximately 3 mm, and the thickness of the porous member 4 is The length is approximately 5 mm.

Therefore, most of the cotton dust will adhere to the lower front surface and the upper back surface of the porous member 4. In particular, the upper part of the porous member 4 becomes very hot due to convection heat, so dust adhering to the upper part of the porous member 4 burns onto the aluminum foil 4a, discoloring the cells 4b, reducing brightness, and impairing the aesthetic appearance. Something happened.

The present invention solves the above problems, prevents dust from adhering to the porous member, prevents the cell brightness of the porous member from decreasing,
It provides a beautifully shining electric stove.

Means for Solving the Problems In order to solve the above problems, the electric stove of the present invention includes:
It consists of a main body with an open front, a heater installed inside the main body that emits radiant heat including visible light, a reflector provided on the back side of the heater, and a plurality of reflective cells arranged on the front side of the heater. The device includes a porous member, and has a ventilation path extending from the lower part of the main body to the upper part of the main body through a space on the back side of the porous member.

Operation In the above configuration, when the heater is energized, air flows as natural convection through the ventilation path passing from the lower part of the main body to the upper part of the main body.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, a heater 6 is provided inside a stove main body 5 with an open front surface, and a reflector plate 7 having a parabolic cross section is provided on the back surface of the heater 6. The reflecting plate 7 is connected to both ends of the front opening 5a of the main body 5, and a porous member 4 similar to the conventional example shown in FIG. 2 is disposed on the entire surface of the front opening 5a. An aperture 8 is provided below the reflector 7, an aperture 9 is provided above the reflector 7, and a ventilation hole 10 is provided at the bottom of the main body 5. A ventilation hole 11 is formed in the air passage 12 in which air flows into the main body 5 through the ventilation hole 10 and flows out of the main body 5 through the ventilation hole 11.

Furthermore, a heat shield plate 13 is provided above the opening hole 11 to partition it from the upper space within the main body 5.

In the above configuration, some of the infrared rays including visible light emitted from the sensor 6 go straight through the cells of the porous member, and some of them are reflected by the walls of the cell/l/4b while passing through the cells. pass. Therefore, the entire surface of the porous member 4 provided on the curved surface of the heater 6 shines beautifully, giving a warm feeling, and in fact prevents unnecessary loss of radiant heat in the longitudinal direction of the heater 6 and causes it to spread in the right angle direction.

Further, the airflow due to natural convection generated by the heat of the heater 6 flows through the vent hole 10 on the bottom of the main body 5, some of it passes through the back side of the reflection plate 7, and the other part passes through the opening of the reflection plate 7. It flows into the space between the reflection plate 7 and the porous member 4 through the hole 8, passes through the opening 9, passes through the flow path formed by the heat shield plate 13 and the reflection plate 7, and flows out from the ventilation hole 11. It turns out.

The pressure loss can be reduced by increasing the opening areas of the openings 8 and 9. Since the porous member 4 is an aggregate of small cells/L'4b, the pressure loss is larger than that of the open holes 8 and 9. Therefore, the main flow of natural convection that occurs between the reflecting plate 7 and the porous member 4 flows in through the aperture 8 and flows out through the aperture 9, and the cotton dust contained in the air adheres to the porous member 4. As this reduces the amount of damage caused, the beautiful shine is maintained over the entire surface of the porous member, improving the sense of warmth and aesthetics of the stove.

Furthermore, the high □□□ air caused by natural convection is completely partitioned into the upper space of the main body 16 by the heat shield plate 13, so all of it is released to the outside through the openings 11, and the temperature on the top surface of the main body does not rise. . Therefore, safety is improved without increasing the temperature of the switch 14 disposed at the top.

In this example, the reflector with a parabolic cross-section is arranged horizontally, but the reflector may be arranged vertically. In this case, both the upper and lower parts of the reflector are connected. Since it is in a room state, there is no need to provide an opening in the reflecting plate.

Effects of the Invention As is clear from the description of the embodiments above, in the electric stove of the present invention, air as a natural convection generated by energizing the heater hardly passes through the porous member. There is no adhesion of fine dust contained therein, there is little discoloration of the porous member, there is little reduction in brightness, a beautiful shine is obtained over the entire surface of the porous member, and the sense of warmth and aesthetics of the stove are not impaired.

2 is a perspective view of a porous member, and FIG. 3 is a side sectional view of a conventional electric stove.

4...Porous member, 5...-main body, 6...
...Heater, 7...Reflector, 8,9...
...Opening hole, 10.11 ...Vent hole, 12.
...Ventilation path.

Name of agent: Patent attorney Toshio Nakao and 1 other person 4-
! ;p L member 5 - Main body 5a - Front opening 2β 6 - and - E 7 - Reflective pole 8.9 - m - Opening hole to, tt - One pore Fig. 1 12 - Air passage No. 2 Fig. 3 figure

Claims (1)

[Claims] A main body with an open front, a heater provided inside the main body that emits radiant heat including visible light, a reflector provided on the back side of the heater, and a plurality of reflective cells arranged on the front side of the heater. What is claimed is: 1. An electric stove comprising: a porous member; and an air passageway extending from a lower part of the main body to an upper part of the main body through a back side space of the porous member.