JPS6346331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to high frequency heating devices such as microwave ovens.

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, a so-called double structure is mainly used, with an outer shell covering the outside of the box that makes up the heating chamber. In other words, there is a certain amount of space between the heating chamber and the outer shell material, and although it is used as a place for installing heat insulating material, various mechanical parts, and connecting wires, etc., 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 you can secure a heating chamber volume that is as large as its external dimensions, the capacity to accommodate 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. Furthermore, the gap between the external shape and the heating chamber is eliminated,
In addition, when the operating section is installed above or below the heating chamber, it is difficult to supply cooling air, etc. to the heating chamber side on the back side of the opening/closing door, and if this is omitted, water vapor will adhere to the back of the door during heating. The drawback was that it was impossible to see through the inside.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, has an easy-to-operate operating section regardless of where the appliance is placed, and has an extremely large volume of the heating chamber compared to its external dimensions. It is an object of the present invention to provide a high frequency heating device that is not difficult to see.

Structure of the Invention In order to achieve the above-mentioned object, the high frequency heating device of the present invention includes: a body plate which also serves as an outer shell material whose top surface and left and right sides are formed into a substantially U-shape from a single plate; a bottom plate provided between the left and right sides; It consists of a back plate and a front plate having an opening for putting in and taking out heated objects.The back plate and the front plate are respectively joined to the front and back of the body plate, and the upper and lower parts of the bottom plate are used for heating chambers, high frequency generators, etc. An electrical room for storing electrical components is provided, and a hollow column is provided on the heating chamber side of the left and right peripheral edges of the front plate opening, and a ventilation opening consisting of a large number of pores communicating with the heating chamber side of the hollow column and the bottom plate side is provided. The device is designed to guide air for cooling the electrical components during heating from the electrical room to the ventilation opening on the bottom plate side, and the operating section is located at the bottom of the main body, making it easy to operate regardless of the installation location. , and the single-piece body plate allows the heating chamber volume to be relatively large compared to the external shape, making it possible to reduce the installation space by that amount. The cooling air introduced into the heating chamber from the hollow column has the effect of preventing fogging of the opening/closing door due to water vapor emitted from the heated object during heating.

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 showing the individual structure, and 1 is a front plate, 2 is a back plate, 3 is a body plate, 4 is a bottom plate, and 5 is a main body floor plate. The front plate 1 has an opening 6 for taking in and out heated objects.
The lower part is the front surface of the control unit. The body plate 3 has a top surface 7, a left side surface 8, and a right side surface 9 formed from a single metal plate in a substantially U-shape, and a bottom plate 4 is stretched between the left and right sides 8, 9, and then the front A plate 1 and a back plate 2 are respectively joined to the front and rear of the body plate 3. The upper part of the bottom plate 4 is a heating chamber 10, and the lower part is an electric chamber 11 for storing electrical parts such as a high frequency generator. It is stored and fixed in the section.

FIG. 2 is a longitudinal section of the main body, and the magnetron 12 is located in the electric chamber 11 and guides high frequency waves to the heating chamber 10 through a waveguide 13 provided at the rear of the back plate 2. In the figure, reference numeral 14 is a propeller fan for cooling electrical parts, and the air blown by the propeller fan 14 is sent to the bottom plate 4.
The air is guided to the left and right ends of the front plate 1 through a ventilation duct (not shown) provided on the lower back side of the front plate 1. FIG. 3 shows a cross section taken along the line A-A' in FIG. Pores 16 and 17 are provided on the heating chamber 10 side and on the bottom plate 4 side, respectively, and extend from the top to the ceiling surface 7 of the body plate 3, and are large enough not to cause high frequency leakage. The pores 17 communicate with the air duct. In FIG. 3, reference numeral 18 denotes a door that can be opened and closed, and the portion facing the opening 6 has a large number of small holes 19 with an opening diameter large enough to prevent high frequency leakage.
A transparent glass or transparent resin plate is attached to the back side of the metal plate. Furthermore, door 1
A transparent plate 20 is also provided on the front surface of 8. The position of the pore 16 is set so that the air coming out of the pore 16 of the hollow column 15 on the heating chamber 10 side comes into contact with the back surface of the door 18.

According to the embodiment as described above, since the heating chamber 10 is formed in a single piece that also serves as the outer shell of the body plate 3, the effective volume of the heating chamber 10 can be made extremely large relative to the external dimensions. It is possible to reduce the weight and store electrical components etc. in the lower electrical room 11.
The center of gravity is located below, making it stable despite its light weight, and the operating section is also located below, making it easy to operate regardless of where it is installed. Also,
A hollow pillar 15 is provided at the rear of the left and right periphery of the opening 6 of the front plate 1.
is provided from the bottom plate 4 to the ceiling surface 7, and has high rigidity despite being a single plate. Air for cooling electrical components is guided to the hollow pillar 15, and the heating chamber 1 is
This has the effect of preventing fogging of the back surface of the door 18 due to water vapor by blowing out into the interior of the door 18.

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

(1) The control unit is located at the bottom of the main unit, making it easy to operate regardless of where the main unit is placed.

(2) The left and right side surfaces and the outside of the top surface of the heating chamber are the immediate outer shell, and there are no extra voids, so the effective volume of the heating chamber can be increased relative to the outer shape.

(3) It is lightweight because it has a single body plate.

(4) Electrical components are housed at the bottom of the main unit, so the center of gravity is low despite its light weight, allowing for stable installation.

(5) Forced air is blown from the hollow pillars installed on the left and right sides of the front opening, so the interior is easy to see without fogging up the door. Further, the hollow pillars are located behind the left and right peripheries of the opening, so that they do not interfere with taking in and out the heated object.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the main body of an embodiment of the present invention, FIG. 2 is a side sectional view of the main body, and FIG. 3 is a second
It is an AA' cross-sectional view in the figure. 1...Front plate, 2...Back plate, 3...Body plate, 4...
Bottom plate, 6...Opening for putting in and taking out the heated object, 10...
Heating chamber, 11... Air chamber, 15... Hollow column, 16
……pore.

Claims (1)

[Scope of Claims] 1. A body plate that also serves as an outer shell material whose top surface and left and right sides are formed into a substantially U-shape from a single plate, a bottom plate extending between the left and right sides, a back plate that covers the back side, and a cover. A front plate having an opening for taking in and taking out heated objects and a door that can be opened and closed to cover the opening for taking in and out of heated objects, and a front plate provided in the heating chamber at the left and right peripheral edges of the opening for taking in and out of heated objects of the front plate. The back plate and the front plate are respectively joined to the front and rear of the body plate, and the upper and lower sides of the bottom plate are respectively used as a heating chamber and an electric chamber for storing electrical components such as a high frequency generator, and the A high-frequency heating device configured to include means for forcing air from the electrical room to the front of the heating chamber. 2. Hollow columns are provided on the back side of the heating chamber side of the left and right peripheral edges of the opening for putting in and taking out heated objects in the front plate, and ventilation openings consisting of a large number of pores communicating with the heating chamber side and the bottom plate side of the columns are provided. 2. The high-frequency heating device according to claim 1, wherein the high-frequency heating device has a configuration in which air for cooling electrical components such as a high-frequency generator is guided to a ventilation opening in the bottom plate.