JPS642392Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to a high-frequency heating device that stirs high-frequency radiation within a heating chamber to uniformly heat an object to be heated.

(B) Prior Art In general, a high-frequency heating device is equipped with a stirrer fan or the like that stirs the radiated high-frequency waves within the heating chamber in order to improve uneven heating. This type of stirrer fan is mounted so that the blades rotate around a shaft attached to the top plate in the heating chamber, and the cooling air from the high-frequency generator is guided to the starrer fan, and the cooling air is used to rotate the starrer fan. I'm letting you do it.

However, since a large amount of wind power is required to rotate the stirrer fan, a considerably large cooling blower is required for cooling, resulting in a large device and a large output. It was hot.

(c) Purpose of the invention The present invention has been made to solve the above-mentioned difficulties, and provides a high-frequency heating device equipped with a stirring device that can be operated with a small blower.

(d) Structure of the invention The high-frequency heating device of the present invention includes a high-frequency generator that radiates high-frequency waves into a heating chamber, a blower that supplies cooling air to the high-frequency generator, and a rotating device that rotates when receiving the cooling air from the blower. A louver that changes the direction of the cooling air supplied to the high-frequency generator, and a louver that is swingably hung near the high-frequency introduction part of the heating chamber, and is swingable to receive the cooling air after cooling the high-frequency generator. It is characterized by comprising a high-frequency stirring piece that moves and stirs high-frequency waves.

(E) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 2 denotes a heating chamber provided within the main body 1, which has an opening (not shown) through which a heated object enters and exits, and is opened and closed by a door 3. Reference numeral 4 denotes a magnetron as a high-frequency generator that oscillates high-frequency waves, and the high-frequency waves oscillated from the antenna are introduced into the heating chamber 2 through a waveguide 5 . A high-frequency stirring piece 7 is provided near the high-frequency introduction part 6, and the stirring piece 7 stirs the high-frequency wave.

8 is a blower that supplies cooling air to the magnetron 4; 9 is a louver rotatably attached to the fan shaft 10 of the blower; this louver receives the cooling air from the propeller fan 11 of the blower 8; It rotates as shown by the arrow to constantly change the direction of the cooling air supplied to the magnetron 4.

Here, since the direction of the cooling air supplied to the magnetron 4 is constantly changing, the cooling air does not hit the magnetron 4 in a biased manner and hits the magnetron 4 uniformly as a whole, so the magnetron 4 is cooled quite efficiently.

Reference numeral 12 denotes a ventilation hole provided in a wall surface 13 of the heating chamber, through which cooling air after cooling the magnetron is guided into the heating chamber 2 .

The high frequency stirring piece 7 is composed of a mounting shaft 14 made of polypropylene or the like to prevent electrical discharge at the mounting portion, and a metal plate 15 integrally provided on the mounting shaft 14. This stirring piece 7 is attached to a mounting shaft 14 on the side plate 16 of the waveguide 5 so as to be swingable around the mounting shaft 14 in the vicinity of the introduction part 6 and facing the blowing hole 12. Ru.

Thus, the stirring piece 7 receives the cooling air guided into the heating chamber 2 through the air blow hole 12 after being cooled by the magnetron. At this time, the cooling air after cooling the magnetron changes as the direction of the cooling air hitting the magnetron 4 changes due to the rotation of the louver 9.
The flow becomes non-uniform and its strength changes sequentially. Therefore, the stirring piece 7 easily swings by receiving the cooling air whose strength changes successively, and stirs the high frequency waves.

(f) Effects of the device As is clear from the above explanation, according to the present invention, a high-frequency stirring piece is swingably suspended near the high-frequency introduction part, and the direction of this stirring piece is changed by a louver, so that high-frequency waves can be generated. The generator is cooled and then oscillated by cooling air whose strength changes successively. The stirring piece can be oscillated by a small amount of wind, and the blower that generates the cooling air can be made smaller.

Further, due to the action of the louver, the cooling air is uniformly applied to the high frequency generator as a whole without being biased, and therefore the cooling efficiency of the high frequency generator can be improved.

[Brief explanation of drawings]

The drawing shows a high-frequency heating device according to an embodiment of the present invention,
Figure 1 is a side sectional view, Figure 2 is a perspective view of main parts, and Figure 3 is a side sectional view.
The figure is a perspective view of the high-frequency stirring piece, and FIG. 4 is a sectional view of the main part. 2... Heating chamber, 4... Magnetron (high frequency generator), 5... Waveguide, 6... High frequency introduction section,
7...High frequency stirring piece, 8...Blower, 9...Louver, 12...Blower hole.

Claims (1)

[Scope of utility model registration request] A high-frequency generator that emits high-frequency waves into the heating chamber, a blower that supplies cooling air to the high-frequency generator, and a fan that rotates when receiving the cooling air from the blower.
A louver that changes the direction of the cooling air supplied to the high-frequency generator and a louver that is swingably hung near the high-frequency introduction part of the heating chamber and swings when receiving the cooling air after cooling the high-frequency generator. A high-frequency heating device comprising: a high-frequency stirring piece that stirs high-frequency waves;