JPS61216296A - High frequency heater - 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 [Industrial Application] The present invention relates to a method for supplying high frequency energy to a high frequency heating device such as a microwave oven.

[Conventional technology]

FIG. 2 is a sectional view showing a conventional high-frequency heating device disclosed in, for example, Japanese Patent Application Laid-Open No. 48-7342.
2 is a heating chamber, 2 is a magnetron for supplying high frequency energy, 3 is an antenna for the magnetron 2, 4 is a waveguide for supplying high frequency energy into the heating chamber 1, which also serves as the installation of the magnetron 2, and 5 is a guide. Radio wave propagation control of wave tube 4, 6 is a metal outer shell forming a heating chamber, 7 and 8 are outer shell 6
The high frequency energy generated from the magnetron 2 is supplied into the heating chamber 1 through the openings 7, 8, etc. Further, reference numeral 9 denotes an object to be heated placed in the heating chamber 1 and placed on a saucer 10.

The conventional high-frequency heating device is configured as described above when exciting the heating chamber from multiple points using one microwave oscillator, and the outer shell 6 constituting the heating chamber has a large number of openings. The heating target is heated uniformly over the course of the day.

[Problem that the invention seeks to solve]

In the conventional high-frequency heating device described above, which uses a single microwave oscillator to excite the heating chamber from multiple points, the high-frequency energy is supplied from each side of the heating chamber, so the waveguide There is a problem in that the power supply becomes complicated and expensive, and to solve this problem, if a method is adopted in which multiple power supply units 1 are installed in one horizontal direction, the object to be heated can be heated uniformly. The problem is that it will no longer be held.

B's invention solves the above-mentioned problem 1 and provides a high-frequency heating device that has a simple structure and is equipped with a high-frequency energy feeding method capable of uniform heating. It is IJ-like to do so.

[Solve the problem): Menochodan]

t1 high frequency heating device according to the invention of Party B, 1 microphone
A single wave oscillator is conveniently used and high frequency energy is supplied from mutually intersecting planes using a single waveguide. 1: The four-frequency energy is branched in the same waveguide, the height of which is halved, and the power is fed in a horizontal direction orthogonal to each other.

[Effect J In the invention of B, one microwave oscillator oscillates and no a% frequency y energy is generated by one waveguide in the middle.
Power is supplied into the heating chamber from the waveguide (2-) branched into the waveguide (2-), which intersects with phase +fi, to uniformly heat the object to be heated.

〔Example〕

Fig. 1 is a 4-section ffti diagram of the embodiment of the invention of B, and 1 to 3 and 6.9 to 10 are exactly the same as the conventional device described in 1.
1 and 11 are waveguides that also serve as attachments for the magnet l-un 2 and supply high-frequency energy into the heating chamber 1; The high frequency energy supplied into the heating chamber 1 is branched into two directions by a cutting plate 19 provided in the waveguide 11. One side, [via radio wave propagation path 12 1.
ft, the high frequency energy 1 is supplied to the heating chamber 1.
L6 frequency energy is supplied to the heating chamber 1 via the opening 11 in the side direction of the heating chamber. 1 ma l-1 waveguide 11
If the height 14 at the supply source is h, the heights of the waveguides after branching are 15 and 16 h/2, respectively.

1. In the high frequency heating device configured as L (
Using the wave oscillation #2, the microphones 1 are used for branching within one waveguide 11 (1, a cut plate is provided in C and L, and two plane openings are orthogonal to each other). Part 17 and 3, where high frequency energy will be supplied from the 1st, the height 14 of the waveguide of the supply source is set to h,
If the height of each waveguide is set to h/2 after branching, the 6-frequency energy supplied from Magne-Lon 2 will be transmitted independently without any F interference. 1 part 17 and side opening 1 in heating chamber 1
Excited by B. In addition, when power is supplied from two planes that intersect with each other, the direction of the electric field is 90 degrees bright red, and each is independent.

In the above embodiment, the openings 11 are set at the top and side of the heating chamber 1, but it can also be applied to any other combination of two orthogonal planes, and can be applied to three branches, four branches, etc. Needless to say.

〔Effect of the invention〕

As explained above in Invention 1 of B, this is a method of feeding high frequency energy by branching into two orthogonal planes.
- and B, the directions of the electric fields are 90 degrees from each other, which has the effect of helping to uniformly heat the object to be heated. In addition, using one microwave oscillator, the height of one waveguide can be reduced by 1/1 at each branch point.
Since the system is divided into two and branched in two directions, the t-comi waves branched in two directions are each independent, which has the effect that the heating chamber can be excited from multiple points with an inexpensive device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment of the invention of B. FIG. 2 is a cross-sectional view showing a method of exciting a heating chamber from a plurality of points in a conventional high-frequency heating device. In the figure, 1 is a heating chamber, 2 is a microwave oscillator, 9 is an object to be heated, 11 is a waveguide, 14 is the height of the waveguide, 19 is a partition plate for branching, and 15.18 is a guide after branching. Wave tube height, 17.
18 are openings in two planes that are orthogonal to each other. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] In a high-frequency heating device configured to heat an object placed in a heating chamber with high-frequency energy, when a single microwave oscillator is used to excite the heating chamber from multiple points, a single waveguide is used. A high-frequency heating device characterized in that the height of the waveguide is reduced to 1/2 at the branching point, and power is supplied by branching into two mutually orthogonal planes.