JPH0426818Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial Field of Application) The present invention relates to a heat shielding device for a cooking device such as an electric oven or a microwave oven, particularly for a top plate of an electric oven.

(Prior Art) Conventionally, for example, in an electric oven, as shown in FIG.
The air 7 inside the inner case 2 heated by the heater 4 turns into hot air and rises to the upper plate 2a of the inner case 2, and also closes the gap 6 between the opening/closing door 5 of the electric oven and the upper part of the inner case 2. More outer case 1
As a result, the top plate 1a of the machine was heated to a high temperature, and touching the top plate 1a often caused burns. As a measure to prevent the top plate 1a of the outer case 1 from being heated, a structure has conventionally been adopted in which the entire top plate 2a of the inner case 2 is covered with a heat shield plate. Such conventional examples are described in Japanese Utility Model Publication No. 52-54614 and Japanese Utility Model Publication No. 57-18578.

(Problem to be solved by the invention) The air 7 inside the inner case 2 heated by the heater 4 does not heat the front surface of the upper plate 2a of the inner case 2, but rather the front surface of the upper plate 2a of the opening/closing door 5 and the inner case 2. It has a characteristic that it collects in gaps and flows out to the outside, and because it exclusively heats the front side of the upper plate 2a of the inner case 2 on the opening/closing door 5 side to a high temperature, the heat shield plate is not necessarily placed on the top of the inner case 2. It is not necessary to cover the entire surface of the plate 2a. On the other hand, as mentioned above, the conventional heat shield plate that covers the entire surface of the upper plate 2a of the inner case 2 does not allow the temperature to rise so much and also shields the half of the back plate 2b, which has low thermal conductivity to the top plate 1a of the outer case. Because it was hot, production efficiency was poor and the heat shielding structure was unreasonable. Also, Utsukai Showa 54-100131
As seen in the above publication, some gas appliances are partially fitted with a heat shield plate, but since the heat shield plate is attached in surface contact with the heated locking edge, it is not shielded due to heat conduction. It has poor thermal effect.

The present invention has been made in consideration of the above circumstances, and aims to provide a heating cooker such as an electric oven that can efficiently insulate the top plate from heat.

[Structure of the invention] (Means for solving the problem) In the present invention, a heating cooking chamber is formed by attaching a heater to an inner case provided within the outer case, and an opening/closing door is provided at the opening of the outer case. In a heating cooker, the upper plate of the inner case is formed near the door side with a size that is approximately half or less of the upper plate and has a width longer than the width of the inner case, and the center is curved upward to form the inner case. A heat shield plate is provided to prevent contact with the upper plate surface.

(Function) The heat shield plate 10 is placed on the front side of the upper plate 9a of the inner case 9 where the hot air in the inner case 9 concentrates to insulate the heat. This will insulate the heat by wrapping it around the hot air that rises.

(Example) FIG. 1 shows the heat shielding structure of the inner case 9 of the present invention, in which a heat shield plate 10 is installed near the opening/closing door 16 so as to cover half of the upper plate 9a of the inner case 9. ing. The mounting structure between the heat shield plate 10 and the upper plate 9a includes locking pieces 1 protruding from both left and right sides of the heat shield plate 10.
1 and 11 are engaged with locking holes 13 and 13 formed in vertical wall plates 12 and 12 provided upright at both left and right end portions of the upper plate 9a at a distance from the upper plate 9a. The width of the heat shield plate 10 is formed to be longer than the width of the inner case 9, and the center thereof is curved upward so that the heat shield plate 10 is attached so as not to come into contact with the upper plate surface of the inner case 9.
A heating cooking chamber is formed by disposing the heater 4 in the upper and lower parts of the inner case 9 configured as described above, and as shown in FIG. Openable door 16 on the front opening of 15
Attach.

FIG. 2 shows the end of the opening 9b of the inner case 9, the front frame 14 into which the opening/closing door 16 is fitted,
This figure shows a structure for attaching U-shaped outer cases 15 to each other, which are mounted on the upper and left and right sides of the inner case 9. First, the inner case 9 and the outer case 15 are connected to the upper edge of the outer case 15 in correspondence with the through holes 18, 18 formed in the protrusion 17 provided upright on the upper edge of the opening 9b of the inner case 9. Through-holes 20, 20, which are similarly drilled, are attached to the vertically installed hanging piece 19, and the screws 21, 21 are passed through and fastened thereto. Protruding pieces 22, 22 protruding from
The outer case 1 corresponds to the through holes 23, 23 bored in the
The through holes 25, 25 formed in the projecting pieces 24, 24 protruding from the left and right side edges of 5 are aligned, and the screws 26, 26 are inserted.
It penetrates and is fixed.

Projections 28, 2 are provided on the upper edge of the front opening of the outer case 15.
8 is formed to protrude forward, and is engaged with through holes 27, 27 formed in the protruding pieces 28, 28, so that the front frame 1
A locking piece 32 is installed vertically below the upper edge of the inner case 9, and the through holes 31, 31 are formed in the support plate 29, which is suspended and fixed to the lower edge of the opening of the inner case 9 by screws 30, 30. Then, through-holes 34, 34 are formed in protrusions 33, 33 vertically provided below the lower edge of the front frame 14, and the locking pieces 32, 32 are engaged with the through-holes 27, 27, respectively. At the same time, the through holes 34 of the frame 14 are inserted into the through holes 31, 31 of the support plate 29.
34 and are fixed by screws 35, 35. In this way, the opening/closing door 16 is pivotally attached to the front frame 14 attached to the outer case 15 by a shaft (not shown) at the lower edge, and can be pulled forward and opened by the handle 37 at the upper front surface.

According to the embodiment of this invention, the heat shield plate 10 can be simply and accurately secured to the front side of the upper plate 9a of the inner case 9 via the locking piece 11. Also, front frame 1
4 to the outer case 15, the fourth
As in the conventional structure shown in the figure, the screws 39 are used to attach the screws, so when the door 16 is opened, the screws are visible from the outside and are not only unsightly, but also may cause defects such as loosening when screwing. A certain point has been changed, and due to the structure in which the front frame 14 is locked to the outer case 15 via the locking pieces 32, 32, which are like claw pieces, even if the opening/closing door 16 of the oven outer case is opened, the locking screw does not appear on the outside. It is not visible and does not spoil the aesthetic appearance, and it also improves work efficiency in assembling the front frame.

[Effects of the invention] This invention has a heat shield plate approximately half the size or less of the upper plate on the upper plate of the inner case near the door. The front side of the inner case, which gets hot, can be efficiently insulated without insulating the rear side of the inner case, where the temperature does not get too high. Compared to a covering structure, the material cost of the heat shield plate can be reduced, and the overall weight of the heating cooker can be reduced. In addition, the width of the heat shield plate is made longer than the width of the inner case, and its center is curved upward so that it does not touch the upper plate surface of the inner case, so that the heat from the upper plate is directly transmitted to the heat shield plate. Not only is there no conduction, but the heated air rising inside the curved heat shield plate can be efficiently shielded by surrounding it from the surroundings.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the heat shield structure of the present invention, Figure 2 is a perspective view showing the heat shield structure of the present invention.
The figure is an exploded perspective view of the front frame and outer case of the embodiment of the present invention, Figure 3 is a perspective view showing the mounting structure of the front frame and outer case of the embodiment of the present invention, and Figure 4 is a conventional example of the same. The perspective view and FIG. 5 are cross-sectional views showing the movement of high-temperature air throughout the conventional heating cooker. 4...Heater, 9...Inner case, 9a...Top plate of inner case, 10...Heat shield plate, 15...Outer case, 16...Opening/closing door.

Claims (1)

[Scope of utility model registration request] In a heating cooking device in which a heating cooking chamber is formed by attaching a heater to an inner case provided within the outer case, and an opening/closing door is provided at the opening of the outer case, the upper plate is placed on the upper plate of the inner case closer to the door side. It is characterized by a heat shield plate that is approximately half the size or less of the plate, has a width longer than the width of the inner case, and is curved upward at the center to prevent it from coming into contact with the upper plate surface of the inner case. A heating cooker.