JPS5923433B2 - High frequency heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high frequency heating device equipped with a heater inside an open space.

2. Description of the Related Art A high-frequency heating device is known in which a heater is provided in an open space equipped with a high-frequency oscillator to heat and cook food.

Normally, one heater is installed at the top and one at the bottom of the open, but recently two heaters are installed at the top and one at the bottom to quickly brown the food. ing. However, when a heater is installed inside an open space, there is a risk that radio waves may leak through the heater. A radio wave absorber is attached to the outside of the connector, and a metal cover surrounds each heater pipe and connector. Therefore, as the number of heaters increases as described above, the structure becomes more complex, resulting in poor assembly workability and increased costs.

This invention was made in view of the above-mentioned circumstances, and its purpose is to house a connector for connecting multiple heaters and a radio wave leak attenuation pipe that fits with the heaters in a single metal cover. The present invention aims to provide a high-frequency heating device that can reduce the number of parts, simplify the structure, and improve assembly workability. The present invention will be explained below based on an embodiment shown in the drawings. Reference numeral 1 in FIG. 1 is a main body of the high-frequency heating device, and an open 2 is provided within this main body 1. A high frequency oscillator 4 made of a magnetron is attached to the outer surface of the open wall 3, and communicates with the open wall 2 via a waveguide 5. 2 at the top and 1 at the bottom of this open 2
Book heaters 6 are attached by means to be described later, and are designed to heat the object 1 to be heated. That is, as shown in FIG. 2, the open wall 3 is provided with a pair of through holes 8, 8 spaced apart in the vertical direction, and the corresponding outer surface of the open wall 3 is provided with a pair of through holes 8, 8 that are integrally formed with the substrate 9. The radio wave leak attenuation pipes 10, 10 provided are attached. Mounting portions 12, 12 of the heaters 6, 6 are inserted into these radio wave leak attenuating pipes 10, 10 via insulators 13, 13. Further, a rectangular cylindrical metal cover 14 is provided protruding from the substrate 9 so as to surround the radio wave leak damping pipes 10, 10. A pair of insulators 15, 15 are attached to the opening of the metal cover 14 in a stacked state, and a radio wave absorber 16 made of ferrite is provided between the insulators 15, 15 and between the metal cover 14. ... is installed. Further, mounting holes 17, 17 are bored in the center portions of the insulators 15, 15, and these mounting holes 17, 17 are provided with the heaters 6, 6.
Connectors 18, 18 into which terminal portions 6a, 6a are inserted are provided. Therefore, radio wave leakage when the heated object 7 housed in the oven 2 is heated and cooked by the high frequency oscillator 4 is attenuated by the radio wave leak attenuation pipes 10, 10, and is further transmitted to the outside of the connectors 18, 18. It is attenuated by the radio wave absorber 16 provided.

In the above embodiment, the radio wave absorbers 16 are provided above, in the middle, and below the insulators 15, 15 surrounding the connectors 18, 18.
... However, according to the inventor's experiments, as shown in Table 1, in the case of one heater, the upper and lower parts of the insulator surrounding the connector are By providing the
In the case of two heaters, it has been found that the regional attenuation effect is more effective by providing them at the bottom, top and bottom, or upper middle and bottom, rather than only at the top.

As explained above, this invention provides adjacent connectors for connecting to a plurality of heaters and radio wave leak attenuating pipes that fit with the heaters on the outside of the oven wall, and provides a radio wave absorber on the outside of the connectors. At the same time, since these connectors and radio wave leak attenuation pipes are surrounded by a single metal cover, it is possible to attenuate radio wave leaks, and the structure is simpler than when each connector is individually surrounded by a metal cover. , assembly workability can be improved.

Therefore, it can be provided at a low price. A radio wave leak attenuation pipe is integrally provided on the board and a plurality of connectors are attached to the metal cover.The metal cover can also serve as a mounting member, which has the effect of reducing the number of parts.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional side view of the entire device, and FIG. 2 is an enlarged longitudinal sectional side view of main parts. 2...Oven, 3...Oven wall,
4...●High frequency oscillator, 6...Heater,
7...Object to be heated, 10...Small wave leak attenuation pipe, 14...Metal cover, 16...
・{Wave absorber, 18...Connector.

Claims (1)

[Claims] 1. In an oven equipped with a high-frequency oscillator and a heater for heating an object, a substrate is provided outside the oven wall, and a plurality of radio wave leak attenuation pipes that fit with a plurality of heaters are integrated into this substrate. These radio wave leak attenuation pipes are arranged adjacent to each other and are surrounded by a single metal cover attached to the substrate, and a plurality of connectors for connecting to the plurality of heaters are installed inside the metal cover. High frequency heating equipment.