JPH0435651B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the configuration of a housing portion related to a row of heating chambers of a high-frequency heating device such as a microwave oven.

Conventional structure and its problems Conventionally, in high-frequency heating devices such as microwave ovens, after forming the heating chamber, the inside of the chamber is painted or
Alternatively, it is generally constructed using a material with high corrosion resistance, such as a stainless steel plate, and the external material of the device is a U-shaped bent steel plate that is separately coated over the heating chamber. It was hot. In such a configuration, a void is created between the heating chamber wall surface (including the ceiling surface and bottom surface) and the external material, which leads to a decrease in the ratio of the effective volume of the heating chamber to the total volume of the device. was.

Of course, these spaces are used to install insulation materials and various mechanisms, but making the heating chamber wider increases the amount of food cooked, which in turn shortens the cooking time. Despite this, it has the disadvantage that the installation area and space occupied by the device also become larger.

In some heating devices, the external material and the heating chamber are partially constructed of a single metal plate, but since the joining method is by spot welding or screw tightening, the outer surface is exposed. It is not appropriate to do so, and therefore these joints are covered with local decorations or covers.
As a result, the number of parts increased, making it expensive.

OBJECTS OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks, and to provide a high-frequency heating device configured to extremely increase the effective volume of the heating chamber with respect to the total volume of the device. Simplify, quantify,
In addition, it is possible to streamline painting and welding processes, etc., and aims to reduce costs.

Structure of the Invention In order to achieve the above object, the high frequency heating device of the present invention includes a heating chamber whose front and back surfaces are joined by painted plate materials, and an opening of the heating chamber that is provided in an opening that can be opened and closed. a door that can be brought into contact with the welding end surface of the heating chamber, a surface that contacts the mating member to be welded, a surface that opposes the welding end surface, and a surface that opposes the welding end surface in the vicinity of the welding jig. Also, the surface that can be brought into contact with the welding jig is made into a non-painted surface in advance. Therefore, in the high-frequency heating device of the present invention, the heating chamber is completed without damaging the welded exterior paint film once welding is completed, and without painting, so only the process of creating the heating chamber is required. Moreover, it has the effect that the manufacturing process of the high-frequency heating device can be significantly shortened.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention in a state before joining.

1 is the front plate, 2 is the main body back plate, 3 is the body plate,
The front plate 1 has an opening 4 for putting in and taking out heated objects and an opening 5 for attaching an operation panel, and a door (not shown) that can be opened and closed is attached to cover the opening 4. The body plate has a ceiling surface 6, a left side surface 7, a right side surface 8,
Consisting of a bottom surface 9 and a partition plate 10, these
As shown in the figure, a single metal plate is formed into a substantially square shape, and then joined to the front plate 1 and the back plate 2.

The space to the left of the partition plate 10 serves as a heating chamber 11, and the space to the right serves as an electrical chamber 12 for storing electrical components such as a high frequency generator.

Each of the front plate 1 and the back plate 2 is formed into a shallow box shape, and is attached so that the portion corresponding to the bottom faces the inside of the body plate 3 at the time of joining.

Incidentally, numeral 13 is a window for installing electrical parts, wiring work, and repair, and the lid is covered after installing the electrical parts.

The joining is done by seaming around the entire circumference of the body plates both at the front and the rear.

As shown in the example shown in FIG.
With the flange portion 16 facing the flange portion 15 with the flange portion 9 on the inside, the flange portion 16 is tightened as shown in FIGS. 3a to 3b.

Next, the connection between the partition plate 10 and the ceiling surface, and the connection between the right bottom surface 9 and the partition plate 10 will be described.

Their joints are protrusions.
This is done using a method called welding. This method utilizes the property that the resistivity of all layers increases as the temperature increases. In other words, a protrusion is created at the joint of the workpiece, brought into contact with the surface of the workpiece, and a large current is passed in a short period of time.The resistance heat (protrusion heat) is used as a heat source to bring the metal to its melting point. This is a method of joining by applying pressure when they are close together or when they have reached a molten state. The feature of this welding method is that it can be welded efficiently and in a short time without damaging the painted surface.

As shown in FIG. 4, the points 9a and 12a that can be contacted by the welding jig at the end faces to be welded and the surfaces 9' and 12a' that contact the mating member are calculated in advance when the sheet is in the form of a sheet. Its joint end surface 9
The surfaces 6a', 12a' that are opposite to a, 12a, and the surfaces 6a, 12b, etc. that can be brought into contact with the welding jig in the vicinity of the opposite surfaces 6a', 12a', are aligned with the unpainted surfaces. , for locations 12a and 6a, electrodes A and B of the welding machine and pedestal C, and locations 12b and 9a.
In this case, welding is performed using electrodes A' and B' and pedestal C'.
An enlarged view is shown in FIG. A projection P is provided at the tip of the point 12a, and a current flows from the electrode A through the projection P, through the metal point 6a, and to the electrode B. As the projection P melts, a current flows at the electrode A. Pressure is applied and the points 12a and 6a are joined. The same applies to portions 12b and 9a.

Next, FIG. 7 shows another embodiment of the structure of the body plate.
It consists of a ceiling surface 6', a left side surface 7', a right side surface 8', and a bottom surface 9', and is formed from a single metal plate in a substantially square shape. After that, the front plate 1 and the back plate 2 are joined by seaming, and the partition plate 14 is attached to the position shown in Fig. 8 using a painted copper plate without a coating film. This is done in the same way as in Figure 5.

According to the two embodiments described above, the wall material constituting the heating chamber 11 and the electrical chamber 12 also serves as an external material, eliminating the need for extra space and reducing the effective volume of the heating chamber 11 to the outer shape of the main body. It has the advantage that it can be made extremely large. At the same time, the number of component parts is reduced, and the strength of the casing can be ensured by seaming, which allows the use of thinner materials, leading to weight reduction. In addition, since the material is prepared before the heating chamber 11 is formed, without applying a coating film to the areas to be spot welded, the strength of the spot welding is sufficient and the spot work can be carried out smoothly. There is.

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

(1) The heating chamber is completed without any painting after welding without damaging the welded exterior paint film when welding is completed, which improves not only the process of creating the heating chamber but also the manufacturing process of the high-frequency heating device. The process can be significantly shortened.

(2) Since the electrical room that houses electrical components such as high-frequency heating equipment has a non-painted surface on its inner surface, it is easy to work in the same work space, and the heating room is a painted surface. Finished beautifully.

(3) The upper, lower, left, and right sides of the heating device main body, as well as each part of the partition plate that stands in parallel with the left and right side walls, are made of a single metal plate and are constructed in a substantially “” shape, and one side is heated with the partition plate as a boundary. Since the structure is such that the heating chamber volume is extremely large compared to the external dimensions, it is the largest heating chamber with the same external dimensions. , economical.

(4) The heating device main body is made of a steel plate consisting of one metal plate on the top, bottom, left and right sides, and is formed into a substantially square shape. Since it is configured with a partition plate that separates the electrical room from the electrical room that stores electrical components,
The main body of the device and the heating chamber are constructed in one piece, allowing for easy metering.

(5) Wrap the peripheral edge of the front plate that forms the heating chamber, the front end of the body plate that forms the top, bottom, left and right sides of the heating chamber from a single metal plate, the peripheral area of the heating chamber back plate, and the rear end of the body plate. Since it has a structure in which it is joined by tightening, it is strong, and since it is joined uniformly over the entire circumference, there is no need to worry about high frequency leakage.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the casing configuration of an embodiment of the present invention before seaming, Fig. 2 is an external perspective view showing the structure of the body plate, and Fig. 3 is a partial sectional view before and after seaming.
Figure 4 is a state diagram of the body plate before being processed into a flat plate with no coating film, Figure 5 is a sectional view showing the body plate partially processed and assembled, and Figure 6 is a welding explanation. FIG. 7 is a perspective view of the shell plate structure of another embodiment, and FIG. 8 is a sectional view showing the assembled state of the shell plate of FIG. 7 without a partial coating film. 1...Front plate, 2...Back plate, 3...Body plate, 4...
Opening, 6... Ceiling surface, 7... Left side, 8... Right side, 9... Bottom, 11... Heating chamber, 12... Electrical room.

Claims (1)

[Scope of Claims] 1. A heating chamber for accommodating an object to be heated, which is formed by joining plate materials whose front and back surfaces are painted, and an electric chamber for accommodating electrical components separated from the heating chamber by a partition plate. The heating chamber side is a painted surface, a surface on which a welding jig can come into contact with the joint end surface, a surface in contact with the mating member to be joined, and a surface opposing the joint end surface;
A high-frequency heating device having a structure in which a non-painted surface, such as a surface that can be contacted by a welding jig near the surface opposing the joint end surface, is provided on the electric chamber side. 2. The upper, lower, left, and right sides of the heating device main body, as well as each part of the partition plates that stand in parallel with the left and right side walls, are made of a steel plate made of a single metal plate and are constructed in a substantially "" shape, and one side with the partition plates as a border is used as a heating chamber. The high-frequency heating device according to claim 1, wherein the other is an electric chamber for storing electrical components such as the high-frequency heating device. 3. The top, bottom, left and right sides of the heating device body are made of a single metal plate and are formed into a substantially square shape, with the left and right side plates standing side by side, one serving as a heating chamber, and the other serving as a heating chamber, and the other serving as an electrical component such as a high-frequency heating device. Claim 1 has a structure in which a partition plate is provided to separate the electrical room from the electrical room that houses the electrical room.
The high-frequency heating device described in Section 1. 4. The peripheral edge of the front plate that forms the heating chamber, the front end of the body plate that forms the top, bottom, left and right sides of the heating chamber from a single metal plate, the peripheral area of the heating chamber back plate, and the rear end of the body plate are each tightened by seaming. The high-frequency heating device according to claim 1, which is constructed by joining.