JPH02306027A - High frequency heating cooker - Google Patents

Abstract

PURPOSE:To efficiently cool an electric part, to facilitate the flow of waterdrops produced by means of steam leaking from a heating chamber, and to prevent the damage of the electric part by a method wherein a control base bed on which a low and a high voltage electric part are placed is mounted obliquely to a bottom plate surface, the heating chamber side is lowered, and a space is formed between the bottom of the heating chamber and the bottom plate. CONSTITUTION:A magnetron 2 for oscillating a high frequency is mounted to the side of a heating chamber 1 through a waveguide 3, a control base bed 5 on which a low and high voltage electric part 4 for oscillating the magnetron 2 is mounted below the magnetron and to a mounting plate 14 molded by using resin, e.g. PP. The control base bed 5 is mounted to the mounting sheet 14 in a direction in which it is inclined based on the bottom of a bottom plate 7, the heating chamber side is lowered and a space A is formed between the bottom of a heating chamber 1 and the bottom plate, and a space B is formed such that the end surface on the heating chamber side of the control base bed 5 is positioned outside the end surface of the bottom flange of the heating chamber 1. A holding part 14a of the mounting sheet 14 supporting the end surface on the heating chamber side of the control base bed 5 is positioned such that the pattern foil of the control base bed 5 and an electric part are prevented from making contact with the holding part, and short-circuit is prevented from occurring between patterns and the electric parts due to leakage of water from the heating chamber 1 and gathering of waterdrops being drops dewed on the control base bed 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high-frequency cooking device for cooking food using high-frequency waves, a heater, or the like.

2. Description of the Related Art For example, in a conventional high-frequency cooking device shown in FIG. - A control board 5 carrying high-voltage electrical components 4 is attached to a mounting plate. 7 is a bottom plate on which the heating chamber 1 and the mounting plate 6 are placed and fixed. Reference numeral 8 is a turntable motor installed at the lower center of the bottom of the heating chamber 1 to rotate the mounting table 9 inside the heating chamber 1, and the motor is fixed to the bottom of the heating chamber 1 by spot welding or the like. Board 10
is attached to. 11 is a turntable motor 8
A fan motor is fixed to the back plate 12 for cooling the electric parts 4, the magnetron 2, etc. 13 is the exterior pode.

Problems to be Solved by the Invention However, in the high-frequency heating cooker having such a configuration, the area of the control board 5 on which the low- and high-voltage electric components 4 are mounted is large, so a large space on the side of the heating chamber 1 is required. In addition, the cooling air from the fan motor 10 is transmitted to the turntable motor 8.
There were problems such as insufficient cooling, and because the control board 5 was flat, steam leaking from the heating chamber 1 was prone to dripping.

Further, there was a problem that the electrical components 4 on the control board 5 could not be effectively cooled.

The present invention solves these conventional problems,
The first purpose is to improve the cooling of electrical components, especially the turntable motor, by effectively utilizing the narrow space, and to prevent dew droplets of steam leaking from the heating chamber 1.

The second purpose is to provide low and high voltage electrical components with a simple configuration.
This is to efficiently cool the electrical components of the control board 5 on which the control board 5 is mounted.

Means for Solving the Problems In order to achieve the first object, the high-frequency heating cooker of the present invention makes effective use of the space on the side of the heating chamber in a narrower space, and cools both the turntable motor and the fan motor. The control board carrying low- and high-voltage electrical components is mounted diagonally to the bottom plate surface so that air can flow smoothly, and the heating chamber side is lowered to create a space between it and the bottom of the heating chamber, and water droplets etc. It is designed to prevent dew droplets from forming.

Furthermore, in order to achieve the second object, the present invention comprises a mounting plate for a control board on which electrical parts are mounted using a resin molded product, and an air guide for guiding cooling air of a fan motor is provided on the side surface of the mounting plate. The air guide is mounted integrally with the plate.

Function The high-frequency cooking device of the present invention has the above-mentioned configuration, so that the control board carrying low- and high-voltage electrical components can be mounted even in a narrow space, and the cooling air from the fan motor can cool the turntable motor and the electrical components on the control board. In addition to being able to cool efficiently,
Water droplets caused by steam leaking from the heating chamber may form dew droplets on the control board (and even if dew droplets do form, they will flow easily).This has the effect of preventing damage to electrical components.

Example Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a magnetron 2 for high-frequency oscillation is attached to a waveguide 3 on the side surface of a heating chamber l, and a low/high voltage electric component 4 for making the magnetron 2 oscillate is mounted below it. A control board 5 is attached to a mounting plate 14 molded from resin such as PP. The control board 5 is attached to the mounting plate 14 so as to be diagonal to the bottom surface of the bottom plate 7, and the heating chamber side is lowered to provide a chamber space A between the control board 5 and the bottom surface of the heating chamber 1. The space B is provided such that the heating chamber side end surface of the heating chamber 1 is located outside the bottom plate flange end surface of the heating chamber 1. In addition, the holding portion 14a of the mounting plate 14 that receives the end surface of the control board 5 on the heating chamber side is designed to prevent contact with the pattern foil or electrical components of the control board 5, thereby preventing water leakage from the heating chamber 1 and the control board 5. The structure is designed to prevent water droplets from accumulating on the top and causing short circuits between patterns and electrical components. The control board 5 in one example of the heating chamber is installed at a height that can secure the minimum necessary insulation distance between it and the bottom plate 7, and the control board 5 is connected to the bottom plate 12 through the space between the bottom plate 1a of the heating chamber 1 and the bottom plate 7.
A cooling fan motor 11 fixed to the cooling fan motor 11 cools the electric components 4, magnetron 2, etc. on the control board 5, and is also installed at the lower center of the bottom of the heating chamber 1 to cool the objects to be heated in the heating chamber 1. It is configured to cool the turntable motor 8 that rotates the mounting table 9 on which it is placed. A motor mounting plate 1o is fixed to the bottom surface 1a of the heating chamber 1 by spot welding or the like, and is used to attach the turntable motor 8;
3 is a body for exterior use.

FIG. 2 shows an embodiment for achieving the second purpose, in which the mounting plate 15 of the control board 5 is made of a resin molded product, and the fan motor 11 for cooling the electrical components 4 on the control board S (see FIG. An air guide 16a that controls the direction of flow of cooling air 17 (arrow) from (not shown).

16b is provided at at least one location on the side surface of the mounting plate 15, and the mounting plate 15 and the air guide 16 are integrally molded. In particular, the cooling air 17 of the fan motor 11 is supplied to the heating chamber 1 (not shown) and the exterior body 13 (not shown).
There is a strong current along the wall surface, and the effect is achieved by controlling the flow of this cooling air 17 and changing the flow as shown by the arrow with the air guide 16 so that the cooling air 17 hits the electrical components 4 on the control board 5. can be cooled down. 17 is a screw for fixing the control board 4 to the mounting plate.

As described above, in the high frequency cooking device of claim 1,
The following effects can be obtained.

(1) By tilting and installing a large control board carrying low- and high-voltage electrical components, the sides of the heating chamber can be used effectively in a narrow space.

C) By lowering the heating chamber side and creating a large space between the control board and the bottom of the heating chamber, the cooling air from the fan motor V can be
The water can flow sufficiently toward the turntable motor provided at the bottom of the center of the heating chamber, and the turntable motor can be efficiently cooled.

(3) By placing the end face of the control board farther than the bottom flange of the heating chamber, water leakage from the heating chamber will not fall onto the P plate, thereby preventing damage to electrical components.

(4) By tilting the control board diagonally so that the holding part of the mounting plate that receives the end face on the heating chamber side does not come into contact with the pattern foil or electrical components of the control board, steam from the object to be heated that leaks from the heating chamber can be removed. Even if dew drops fall on the control board, flow to the end surface on the heating chamber side, and accumulate, short-circuit damage between patterns on the control board and electrical components can be prevented.

Moreover, in the high frequency heating cooker according to claim 2, the following effects can be obtained.

(1) By integrally molding the air guide that controls the cooling air of the fan motor with the mounting plate of the control board, electrical components on the control board can be effectively cooled with a simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a high-frequency heating cooking device according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of a control board mounting part of another embodiment of the present invention, and Fig. 3 is a conventional high-frequency heating cooking device. It is a longitudinal cross-sectional view of the vessel. 1... Heating chamber, 2... Magnetron,
4... Electrical parts, 5... Control board, 6
, 14.15... Mounting plate, 7... Bottom plate, 8... Turntable motor, 11...
...Fan motor V, 16a, 16b...Air guide, 17a, 17b...Cooling air. Name of agent: Patent attorney Shigetaka Awano and one other person f5-butsukekut-sun

Claims (2)

[Claims] (1) A heating chamber for cooking food, a control board provided on the side of the heating chamber, a mounting plate that holds the control board, a bottom plate on which the mounting plate is placed, and electricity on the control board. A fan motor for cooling the components is provided, the control board is mounted obliquely to the bottom plate surface, and the heating chamber side is lowered to provide a space between the heating chamber bottom surface and the fan motor. A high-frequency heating cooker that improves cooling and prevents water leakage from the heating chamber. (2) A heating chamber for cooking food, a control board provided on the side of the heating chamber, a mounting plate that holds the control board, a bottom plate on which the mounting plate is placed, and electricity on the control board. A fan motor for cooling the components is provided, the control board is mounted obliquely to the bottom plate surface, and the heating chamber side is lowered to provide a space between the heating chamber bottom surface and the fan motor. An air guide that improves cooling and prevents water leakage from the heating chamber, has a control board mounting plate made of a resin molded product, and controls the flow of cooling air from a fan motor for cooling electrical components on the control board. is provided on a side surface of the control board, and the air guide is integrated with a resin molded product of the mounting plate.