JPS6367616B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of a high frequency heating device such as a microwave oven.

Conventional configuration and its problems Cooking appliances such as microwave ovens are often placed near the cooking area in the kitchen, but due to housing conditions and the diversification of cooking-related appliances, the space for placing these cooking appliances has become limited. is subject to major restrictions.

Conventional heating cooking appliances such as microwave ovens are generally equipped with a heating chamber and an operating section to the right of the heating chamber.The operating section is located at the front of the electrical chamber that houses the high-frequency generator and other electrical components. There are knobs such as a timer for setting the heating time and a dial for setting the temperature in the heating chamber.

The reason why these operation parts are located on the right side of the main body is based on the assumption that the majority of users are usually right-handed, and does not take into account the arrangement of various appliances in the kitchen. In other words, depending on where these heating cookers are placed, the door that covers the front of the heating chamber may need to open to the left or the right, and depending on the opening/closing direction of the door, the operating section may also open to the left. In some cases, it may be easier to operate the device if it is on the left side, but in reality there is no such thing as a device with a left-hand control section. Even if the door opens from the front, the operating section is usually located on the right side.
A heating cooking appliance having such a configuration has the disadvantage that it is extremely difficult to operate depending on the location where it is placed, and also requires a large installation space.

Recently, some devices have been seen in which the operation section is placed at the top or bottom of the main body to alleviate the above-mentioned drawbacks. However, even in this case, the heating chamber is mainly constructed of a double-layer structure in which an external material is placed over the outside of the box. In other words, there is a certain amount of space between the heating chamber and the external material, and although it is used as a place for installing heat insulating materials, various mechanical parts, and connecting wires, this space makes it difficult for the main body to The drawback remains that the effective volume of the heating chamber is relatively small relative to the external dimensions.

When determining the external shape of the main unit due to installation space constraints,
If we can secure a heating chamber volume that is as large as its external dimensions, the storage volume of the heated object will increase accordingly.
This will ultimately lead to a reduction in heating time.
Also, if a heating chamber with the same volume as a conventional heating chamber but without the above-mentioned voids could be created, it would have the advantage of helping to reduce the installation space.
The volume of the heating chamber is proportionally smaller, and when the volume of the heating chamber is used as a reference, the external shape of the main body becomes larger, which has the drawback of requiring a larger installation area.

In addition, in cases such as Japanese Patent Application No. 58-75780 where the exterior plate and the heating chamber are made of the same material, conventionally the only option was to exhaust steam and odors generated from the object to be heated inside the heating chamber outside the main body. . In this case, since the exhaust cover itself is an exterior part, it is necessary to apply appropriate exterior surface treatment, and the front and rear dimensions of the product will be larger by the amount of the exhaust cover.
Additional installation space was required. Furthermore, even the packaging used to deliver the products to customers has become larger, and transportation costs have also increased. In addition, if the product is manufactured using the method as in Tokugaku Sho 58-75780, where the operation panel and power supply parts are placed at the bottom, there is no place to install a light inside the chamber, and the object to be heated cannot be illuminated from the bottom of the heating chamber. Unfortunately, an interior light was installed on the back panel, and a cover was also placed over the interior light to ensure the safety of the user. At that time, if you use a small cover, the heat of the internal light will shorten the life of the internal light, so use a cover of a certain size.
The front and rear dimensions of the product became large, and even though the structure of Japanese Patent Application No. 75780/1983 was adopted to reduce the installation area, the installation area ended up increasing.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and the operation part is easy to operate regardless of where the appliance is placed.In addition, the external dimensions are extremely small compared to the size of the heating chamber, and the installation area is reduced. It is an object of the present invention to provide a configuration of a high-frequency heating device that can be made smaller.

Structure of the Invention In order to achieve the above-mentioned object, the high frequency heating device of the present invention has a substantially U
The side wall of the shaped heating chamber is fixed, and the interior lighting is installed in one side of the double U-shaped space between the inside and outside, and the exhaust passage is installed in the other.Since the back plate does not protrude outside, the front and rear dimensions of the product can be reduced. In addition to reducing the installation area, there is no need for a safety cover for the interior light for users because there is an exterior panel, and the exhaust passage is also inside the exterior panel, so the surface Since the treatment is sufficient to prevent rust, it also has the effect of reducing costs.

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

FIG. 1 is an exploded perspective view of a housing portion of a high-frequency heating device according to an embodiment of the present invention, and FIGS. 2 and 3 each show a cross section of the device. 1 is a front plate, 2 is a back plate, 3 is an exterior plate, which includes a top surface 3a, a left side surface 3b,
The right side surface 3c is formed from one metal plate into a substantially U-shape, and the side wall 4 of the heating chamber 5 is provided inside the exterior plate 3, and the upper surface of the side wall 4 of the heating chamber 5 is formed of an exterior plate. It also serves as the top surface 3a of 3, the left side wall 4a, and the bottom surface 4.
(b) The right side wall 4c is formed of a single metal plate into a substantially U-shape, and the horizontal surface of the bottom surface 4b is fixed substantially flush with the opening lower end 1a of the front plate 1 of the heating chamber.

Above the bottom surface 4b is a heating chamber 5, and below it is an electrical chamber 6 for storing electrical components.

The back plate 2 has a punched hole for an exhaust port 7. In FIG. 2, the right side wall 4c of the heating chamber 5 has a heating chamber 5
There is a side wall exhaust punching hole 8 that discharges water vapor and odor from the heated items inside the chamber, and a maze is formed to cover the exhaust punching hole 8 and prevent flames generated inside the chamber from reaching the chamber. Exhaust labyrinth section 9
and an exhaust partition plate that prevents exhaust gas from flowing into the electrical room 6.

Therefore, the exhaust gas and flame exit the exhaust punching hole 8 on the right side wall 4c of the heating chamber 5, flow once toward the front of the equipment in the exhaust labyrinth section 9, and then pass through the exhaust labyrinth section 9 to the right side surface of the exterior plate 3. Exhaust gas is discharged from the exhaust port 7 of the back plate 2 through the passage with the exhaust gas 3c and the like.

Next, electrical control parts and the like are attached to the floor plate 11 of the main body of the apparatus, and fixed so as to be housed in the electrical room 6 through the opening at the bottom of the inverted U-shape of the exterior plate 3.

In FIG. 2, reference numeral 12 denotes a tray for placing the object to be heated, and is rotated by a motor 13.

14 shows a heating time setting timer as an example of the arrangement of operating parts.

On the other hand, on the left side wall 4a of the heating chamber 5 there is an interior lighting lamp 1.
There are punched holes 16 that guide the light of 5 into the heating chamber 5, and are provided with a diameter, pitch, and number of holes that do not leak high frequency waves. In order to prevent the exhaust gas from inside the heating chamber 5 from flowing out to the outside and having an adverse effect on electrical components,
A heat-resistant, light-transmitting thin film 17 is attached to prevent the objects to be heated from scattering and adhering to the interior lamp 15, thereby reducing the illumination effect. The interior light 15 is located on the left side wall 4 of the heating chamber 5.
It is fixed to the outer metal fitting 18 of a. In addition, an opening 19 is provided in the left side surface 3b of the exterior plate 3, and an inspection window 20 is inserted into the screw 21 for installation and removal of the interior light 15, lamp replacement, and wiring work during assembly and service.
It is installed.

According to the embodiment configured as above, the heating chamber 5
The bottom surface 4b of the heating chamber 5 is horizontally substantially flush with the opening lower end 1a of the front plate 1, making it easy to clean, making it easy to put in and take out the saucer 12, and improve the usability of the heating chamber 5.
Since the upper surface also serves as the upper surface 3a of the exterior plate 3, the effective volume of the heating chamber 5 can be increased relative to the external dimensions, and by arranging various electrical components at the bottom, the center of gravity of the main body can be positioned downward. Although it is lightweight, it can be installed stably.

In addition, the exhaust labyrinth part is connected to the right side 3c of the exterior plate 3.
Since the space between the exhaust cover and the right side wall 40 of the heating chamber 5 can be effectively utilized, the front and rear dimensions of the product can be made smaller than when the exhaust cover is provided outside as in the conventional case.

In addition, the interior light 15 is connected to the left side surface 3b of the exterior plate 3,
Since it can be installed by making good use of the space between it and the left side wall 4a of the heating chamber 5, if it were installed on the back plate as in the past, a safety cover for the user would be provided, but even that safety cover is not required. This has the effect of reducing costs and making it possible to reduce the front and rear dimensions of the product.

It also has the effect that all the spaces on the left, right, and bottom formed between the double U-shapes can be used effectively.

An opening 19 is provided in the exterior plate 3 and the inspection window 20 is secured with screws 2.
1 installed, it has the effect of improving workability both during assembly and service.

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

(1) The operation section is located at the bottom of the main body so that it can be easily operated regardless of where the main body is placed.

(2) The outside of the top and back surfaces of the heating chamber is the exterior of the main body, there are no extra voids, there are no other components, and the height of the main body is relatively and substantially low;
Effective use of installation space in the kitchen can be achieved.

(3) Since the top surface of the heating chamber also serves as the top surface of the exterior plate,
The weight can be reduced accordingly, and the material cost can also be reduced accordingly.

(4) Right side 3c of exterior plate 3 and right side 4 of heating chamber 5
By making good use of the space between C and C, an exhaust labyrinth section can be provided, and the front and rear dimensions of the product can be made smaller than when installing an exhaust cover on the outside of the device body as in the past, allowing for effective use of installation space in the kitchen. I can figure it out.

(5) Electrical components are placed all at once on the floor plate of the main unit and stored in the electrical room on the exterior board, and most of the work can be done before assembling the parts and storing the wiring.
In addition to being easy to assemble, the center of gravity of the entire device is located at the bottom, allowing for extremely stable installation.

(6) Since the lower end of the front plate opening and the horizontal plane of the bottom of the heating chamber are approximately on the same plane, it is easy to put in and take out objects to be heated and the saucer, and the inside of the heating chamber can be cleaned very easily. can.

(7) Since the exhaust labyrinth section is not provided externally but is provided inside the exterior plate, these parts do not need to be subjected to external surface treatment as an exterior plate, and can be simply treated with anti-corrosion treatment, contributing to cost reduction.

(8) Since the exhaust labyrinth part does not protrude from the back plate of the product as in the conventional case, but is housed within the exterior plate, the external dimensions of the product, especially the front and back dimensions, can be made smaller than before, making it easier to package the product for delivery to the customer. It can be made smaller, which greatly contributes to lower packaging costs and even transportation costs.

(9) Since the interior light is not provided externally but is provided inside the exterior panel, these parts are no longer necessary, contributing to cost reduction.

(10) Since the opening of the exterior plate is large enough to cover the interior light and is provided on the side of the space where there is no exhaust passage, there is no need to consider the gap between the inspection window and the exterior plate.
Attaching and removing the interior light to the main body, wiring,
It has very good workability, including during inspection and service.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the exterior plate, heating chamber plate, etc. of a high-frequency heating device according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line B-B' of the main body of the heating device in Fig. 1, and Fig. 3 1 is a longitudinal cross-sectional view taken along the line A-A' of the main body of the heating device in FIG. 1; FIG. 1... Front plate, 2... Back plate, 3... Exterior plate, 4...
...Heating chamber side wall, 5...Heating chamber, 6...Electric room, 7
...exhaust port, 8...exhaust punching hole, 9...exhaust labyrinth section, 10...exhaust partition plate, 11...floor plate, 12...saucer, 13...motor, 14...timer, 15... Interior lighting, 16...Punching hole, 17...Translucent thin film, 18...Metal fittings, 19
...opening, 20...inspection window, 21...screw.

Claims (1)

[Scope of Claims] 1. An exterior plate formed of a single plate having a substantially U-shape on the top surface and left and right side surfaces of the heating device body, and a single plate located inside the exterior and having a substantially U-shape on the bottom surface and left and right sides. The side wall of the heating chamber formed by and the back plate of the heating device main body,
a heating chamber formed by fixing a heating chamber side wall to an upper surface of an exterior plate and fixing a back plate and a front plate of the heating device body thereto; The bottom plate of the heating device body is fixed to both ends of the approximately U-shaped exterior plate of the heating device body, the electrical room that stores the electrical components of the high-frequency generator, and the storage area that illuminates the progress of the heated items. It is equipped with an interior illumination light provided to make the inside easily visible, and an exhaust passage provided to exhaust water vapor etc. generated from objects to be heated in the heating chamber, and an exterior plate and a heating device main body located outside the heating chamber. A high-frequency heating device having a structure in which an internal light is provided in one space on the side of the heating chamber, and an exhaust passage is provided in the other space on the side of the heating chamber, of the space formed by the bottom plate. 2. The high-frequency heating device according to claim 1, wherein an inspection window for the interior illumination light is provided on the exterior plate facing the interior illumination light.