JPS5918591A - Heating cooking device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high voltage transformer, a low voltage transformer, and an AC-DC relay for a cooker having a microwave oven function.

This relates to the supply of cooling air to printed circuit boards, transformers, and mutual magnetic shielding of DC relays on the two-vane lint board.

Conventional Structure and Problems Conventionally, this type of microwave oven has had a high voltage transformer mounted directly on the bottom plate. The transformer coil reaches a high temperature of around 135°C, which has an adverse effect on printed circuit boards and other parts. Furthermore, because of the magnetic shielding of the high-voltage transformer, the printed circuit board was placed in an iron box, making serviceability extremely difficult.

OBJECTS OF THE INVENTION The present invention overcomes the drawbacks of the prior art and aims to improve the cooling and magnetic shielding effects of printed circuit boards.

Structure of the Invention In order to reduce the influence of high temperatures caused by placing the high voltage transformer on the floor, the present invention places the high voltage transformer close to the magnetron, which is also at high temperature, cools the magnetron and the high voltage transformer at the same time, and makes the fixing base of the high voltage transformer table-like. By installing a printed circuit board, a three-page magnetic shield is achieved and the temperature is maintained at a low temperature.

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

In FIG. 1, an exhaust port 1 is an exhaust port for exhausting smoke from cooking and the wind from a cooling fan.

It is operated using the knobs on each part of the operation panel 2.

FIG. 2 shows the configuration of an air guide and a U-turn guide that are incorporated into a composite cooking device that is integrated with a gas oven. There is a transformer fixing base 4 under the high voltage transformer 3, and a printed circuit board 6 is placed in the transformer fixing base 4. As the cooling fan 6 rotates, the cooling air intensively cools the magnetron 7 and the high-voltage transformer 3, but a portion of the cooling air is collected by an anti-fog guide 9 for supplying air to prevent the oven door glass 8 from fogging. The air passes through the punched hole 11 in the wall of the heating chamber 10 and enters the heating chamber 10 to prevent the oven door glass 8 from fogging.

The primary air of the barb 2 draws in the surplus air from the cooling fan 6. Among the cooling air from the cooling fan 6, the side plate 13 of the main body
The downward cooling air W1 from the right side reaches the printed circuit board 6 through the gap between the transformer fixing base 4 and the side plate 13.The hot air does not descend near the printed circuit board 6, so keep it low. Can be done. The air that has cooled the parts of the printed circuit board 5 flows toward the bottom of the heating chamber 10.

As described above, according to this embodiment, the following effects can be obtained.

(1) Such as magnetron γ and high voltage transformer 3,
By arranging a component that generates heat at a higher temperature than other components above the printed circuit board, it is possible to make the upper part a high-temperature zone and the lower part a low-temperature zone, and at the same time, it is possible to enhance the cooling effect of the cooling fan 6.

(2) Since the transformer fixing base 4 blocks hot air and guides only cold air along the side surface 13, the parts of the printed circuit board 5 can be kept low.

(3) Since the magnetism of the high-voltage transformer 3 and the low-voltage transformer 14 is shielded by the transformer fixing base 4, relay operation and noise due to magnetism can be prevented.

Effects of the Invention As described on page 5 and above, according to the present invention, it is possible to efficiently reduce the temperature of a printed circuit board on which small electronic components are mounted by cooling air, and also to enhance the magnetic shielding effect and prevent malfunctions.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a cooking device according to an embodiment of the present invention, and FIG. 2 is a partially broken external perspective view of the cooking device. FIG. 3 is an external perspective view of the main parts of the container. 3... High voltage transformer, 4... Transformer fixing stand, 5... Printed circuit board, 7...
Magnetron (heating means), 10... heating chamber,
13...Side plate.

Claims (1)

[Claims] A heating chamber for storing and heating food; a heating means inside the heating chamber for heating the inside of the heating chamber; a cooling fan located outside the heating chamber for cooling electrical components; and a transformer fixing for fixing heat-generating components such as transformers. a printed circuit board is provided at the lower part of the high voltage transformer fixing base, the printed circuit board is surrounded by the high voltage transformer fixing base and a main body side plate, and the cooling fan is provided through a gap between the transformer fixing base and the side plate of the body case. A heating cooker configured to guide wind to cool the printed circuit board and magnetically shield it.