JPH0875174A - Heater - Google Patents

Abstract

PURPOSE: To provide a heater in which the illumination in a heating chamber is bright and uniform, and material to be heated has no shadow and can be clearly observed. CONSTITUTION: An illuminator 6 is disposed near the front surface of the central part of the ceiling of a heating chamber 1. A light transmission part 8 for illumination corresponding to the illuminator 6 is formed of a concentric curved surface having a light source as a center, and the surface of a through hole 7 is perpendicular to a light propagating direction. Thus, the light can be efficiently introduced into the chamber, the entire area in the chamber 1 can be brightly illuminated, and the material to be heated in the chamber 1 can be clearly illuminated without shadow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for heating an object to be heated, and more particularly to lighting in a heating chamber.

[0002]

2. Description of the Related Art Conventionally, in this type of heating apparatus, an incandescent light bulb for illuminating the heating chamber 1 is attached to the outside of the side surface of the heating chamber as shown in FIG.

[0003]

However, in the conventional heating device, the incandescent bulb 6 is located outside the side surface of the heating chamber 1. Since the object to be heated is irradiated from that position, the object to be heated is irradiated. There was a problem that the shade appeared clearly and the brightness to the front part where the object to be heated was actually seen was not sufficient. Further, as shown in FIG. 4, the incandescent lamp 6
In the light-transmitting part for illumination, which is a little away from, almost no light enters the heating chamber, and the irradiation of the object to be heated is not sufficient. For this reason, it is conceivable that the through hole 7 of the light-transmitting portion for illumination is enlarged as the distance from the incandescent lamp 6 increases. The outside of the side surface is contaminated. Moreover, there is a new problem that it is very difficult to clean this part.

The present invention solves the above-mentioned conventional problems, and an object thereof is to illuminate an object to be heated clearly without shading.

[0005]

To achieve the above object, the present invention provides a heating chamber for heating a chamber to be heated, an openable door provided on the front surface of the heating chamber, and a ceiling surface constituting the heating chamber. An illuminating light-transmitting part having a large number of through-holes provided in a part of the front surface side of the The translucent portion has a curved surface that is substantially concentric with the light source of the illumination device as the center.

[0006]

The present invention has an illumination device (light source) having the above-mentioned structure.
The emitted light intersects the hole surface of any through hole substantially perpendicularly, so that the amount of light transmission is almost the same as any through hole. Moreover, since the lighting device is provided outside the ceiling surface in front of the heating chamber, the front surface of the object to be heated can be uniformly illuminated.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heating cooker according to the present invention will be described below with reference to the drawings. The same symbols are given to parts having the same functions as those of the conventional example.

FIG. 1 is a side sectional view of the heating cooker. Two
Is a door that can be opened and closed to put food in and out of the heating chamber. A large number of small holes are provided in the center of the door 2 to provide a see-through window 3 through which the heating state of the food in the heating chamber can be seen. Further, 4 is a drive motor arranged at the lower center of the bottom surface of the heating chamber 1, and rotates the cooking dish 5 via a pulley shaft. An incandescent lamp 6 is arranged on the upper front surface of the heating chamber 1. Incandescent lamp 6 in front of the center of the ceiling of the heating chamber
Corresponding to the above, the light transmitting portion 8 for illumination having a large number of through holes 7 is provided. The translucent portion 8 for illumination is configured to have a curved surface that is substantially concentric with the light source of the incandescent lamp 6 as the center. With this configuration, the light emitted from the light source intersects the hole surface of the through hole 7 perpendicularly. As a result, the amount of light transmitted through any of the through holes becomes substantially the same. Therefore, it is possible to efficiently pass light through the heating chamber, reduce the variation in brightness depending on the direction, and illuminate the heating chamber substantially uniformly. Moreover, in the present invention, since the light source is provided on the front side of the heating chamber, the heating object can be illuminated from the front side. Therefore, it is possible to illuminate the heated object clearly and uniformly with little shadow.

In the above embodiment, the case where the light-transmitting portion for illumination is provided concentrically with the light source has been described. However, if it cannot be provided concentrically due to the structure of the heating chamber, it may be a curved surface having a large curvature. In this case, if the curvature is made too large, a large shadow appears as in the conventional example, so it is necessary to make the curvature practically unproblematic. Also,
In this case, shading can be reduced by changing the size of the through hole.

Further, in order to reduce shading of the heating object and to illuminate it uniformly, it is necessary to change the density of through holes or the size of the through holes of the light-transmitting portion for illumination, that is, per unit area. This is achieved by partially changing the amount of light transmission.

Further, the larger the size of the through-hole, the greater the amount of light transmitted and the better the illumination efficiency. However, if the through-hole is large, the scattered particles of the heating object are transmitted through the through-hole and the incandescent lamp or the like as described above. To pollute. Further, when high-frequency heating is adopted as a heating means for heating the heating object, there arises a problem of radio wave leakage. Therefore, the diameter of the through hole is 0.6 to 3.0 mm.
The position is practical.

Although the incandescent lamp is used in the above embodiment, the invention is not limited to this.
A halogen lamp or the like may be used. That is, any lighting device may be used.

[0013]

As described above, according to the heating device of the present invention, the following effects can be obtained.

(1) Since the through-hole surface of the translucent part for illumination of the heating chamber is provided perpendicularly to the light traveling direction of the heating device, the light can be efficiently introduced into the heating chamber, and the same. Even with a bright incandescent lamp, it is possible to illuminate the heated objects in the heating room brighter than before.

(2) Since the incandescent lamp is arranged in front of the upper part of the heating chamber, the object to be heated in the heating chamber has little shadow and can be illuminated clearly and uniformly.

[Brief description of drawings]

FIG. 1 is a side sectional view of a heating device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a configuration of a light transmitting portion for illumination according to an embodiment of the present invention.

FIG. 3 is a plan sectional view of a conventional heating device.

FIG. 4 is a sectional view of an essential part showing the configuration of a conventional illumination unit.

[Explanation of symbols]

 1 heating chamber 2 door 6 lighting device (incandescent lamp) 7 through hole 8 translucent part for lighting

Claims (1)

[Claims] 1. A heating chamber for heating a chamber to be heated, an openable and closable door provided on the front surface of the heating chamber, and a large number of through holes provided on a part of the front surface side of the ceiling surface constituting the heating chamber. An illumination translucent part having a hole, and an illuminating device for illuminating a heating chamber provided corresponding to the illuminating translucent part, wherein the illuminating translucent part is substantially centered on the light source of the illuminating device. A heating device having a concentric curved surface.