JPH051573B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetron device used in high frequency cooking appliances and the like.

BACKGROUND ART Conventionally, a magnetron device used in a high-frequency cooking device or the like has generally been constructed as shown in FIG. That is, an anode body 2, a magnet 6 disposed close to and coaxially with the anode body 2, a mouth-shaped yoke 3 that magnetically connects the anode body 2 and the magnet 6, and a side wall portion of the anode body 2. An output antenna portion 4 is provided to protrude perpendicularly to the axis of the anode body 2, and the output antenna portion 4 extends through a through hole (not shown) formed in the yoke 3. ing. Further, on the outer surface of the anode body 2, a flat heat dissipation fin 5 having a cylindrical protruding wall portion 51 on the plate surface is disposed on the output antenna portion 4.
The anode body 2 is press-fitted with multiple plates sandwiching the anode body 2, which becomes hot during the oscillation operation of the magnetron device 1.
The vicinity of is cooled by a cooling fan (not shown).

Problems to be Solved by the Invention However, in the conventional configuration described above, the flat heat dissipation fin 5 is press-fitted to the anode 2 so as to sandwich the output antenna section 4. 5, and the space 8 of the radiation fins 5 near the output antenna section 4 becomes larger than the space 7 between the radiation fins 5. That is, a static pressure difference occurs between spaces 7 and 8,
The cooling air from the cooling fan (not shown) will flow more into the space 8 where the static pressure is low, and conversely, the cooling air will be less likely to flow into the space 7 where the static pressure is high.
The heat radiation balance of the magnetron device 1 is disrupted, and a temperature distribution difference occurs in the axial direction of the anode 2, resulting in thermal distortion. Further, as described above, since a large space 8 is required, the anode 2 also becomes large, which leads to problems such as an increase in the size of the entire magnetron device 1.

Means for Solving the Problems In order to achieve this object, the magnetron device of the present invention is provided with an output antenna section in a direction perpendicular to the axis of the cylindrical anode body, and the output antenna section is sandwiched between the cylindrical anode body and the cylindrical anode body. Heat dissipation fins having recesses formed in the shaped anode body so as to avoid the output antenna portion are disposed and assembled so that the recesses face each other.

Effects According to the present invention, with the above-described configuration, the air volume distribution in the magnetron device is made uniform, the amount of heat radiation is increased, thermal distortion is removed, and the heat radiation fins can be arranged closely, so that the device can be made smaller.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a magnetron device according to an embodiment of the present invention, and FIG.
A sectional view taken along line A-A', and FIG. 3 is a perspective view of a heat dissipation fin having first and second recesses.

In FIGS. 1 to 3, the anode body 12
, a magnet 16 disposed near and coaxially with this anode body 12 , and a mouth-shaped yoke 13 that magnetically connects the anode body 12 and the magnet 16 .
, an output antenna part 14 protruding from the side wall of the anode body 12 so as to be perpendicular to the axis of the anode body 12 , and this output antenna part 14 has a through hole (not shown) bored in the yoke 13 . It extends through. Further, a plurality of heat radiation fins 15 are press-fitted onto the outer surface of the anode body 12 so as to sandwich the output antenna section 14 . Further, cooling air generated by a cooling fan (not shown) flows in the direction of arrow 17 orthogonal to output antenna section 14 . That is, the output antenna section 14 is disposed perpendicular to the cooling opening of the magnetron device 11. Now, the heat dissipation fin 15 has a cylindrical protruding wall part 18 that can fit into the anode body 12 near its center, and is disposed coaxially with the output antenna part 14 of the anode body 12. A first recess 20 is formed. The groove width of the first recess 20 is the same as that of the output antenna section 1.
It is formed to have a size slightly larger than the outer diameter of No. 4. Then, a second recess 2 is formed from the opposite direction to the first recess 20 on both end sides in a direction perpendicular to the first recess 20.
1 and 22 are formed. The heat dissipation fins 15 formed in this manner are arranged and assembled vertically symmetrically around the output antenna part 14 as shown in FIGS. It is formed so that it becomes larger as it moves away from the portion 14.

The operation of the magnetron device of this embodiment configured as described above will be explained below.

When the magnetron device 11 is operated in oscillation, the anode main body 12 generates heat and the anode loss increases, so a cooling fan (not shown) is installed from the direction of the arrow 17.
Cooling air is blown by the anode main body 12 to cool the anode body 12. At this time, the second recess 2 of the radiation fin 15
1 and 22, the space 27 between the radiation fins 15 and the space 28 between the radiation fins 15 near the output antenna section 14 are approximately equal. In addition, since the recess 20 near the output antenna section 14 is formed so that the groove width L dimension thereof increases as it moves away from the output antenna section 14, the cooling air flowing from the direction of the arrow 17 radiates heat without encountering resistance. It passes between the heat dissipation fins 15 , cools the output antenna section 14 , passes again between the heat dissipation fins 15 , and is emitted from the magnetron device 11 . In this way, since the spaces between the heat dissipation fins 15 are approximately equal, there is no difference in static pressure between the respective spaces, and the cooling air flows uniformly to all spaces, thereby improving the air volume distribution.
Heat radiation distribution becomes uniform. Further, since the airflow flowing through the recess 20 flows along the output antenna 14 and is bent between the fins, the heat transfer performance is improved, the amount of heat radiation is increased, and the cooling effect of the magnetron device is significantly enhanced.

Further, since there is no extra space and the heat dissipation fins 15 can be arranged closely, it is possible to downsize the magnetron device.

Effects of the Invention As described above, the magnetron device of the present invention has an output antenna section provided in a direction perpendicular to the axis of the cylindrical anode body, and a heat dissipation section having a concave section in the cylindrical anode body with the output antenna sandwiched therebetween. Since the fins are fitted together, the space between the heat dissipation fins is equal, and the air volume distribution and heat dissipation distribution are uniform, and the amount of heat dissipation is also increased, so the cooling effect is significantly enhanced. Furthermore, since the heat dissipation fins can be arranged closely, it is possible to downsize the magnetron device, thereby realizing an excellent magnetron device.

[Brief explanation of the drawing]

Figures 1 to 3 show a magnetron device according to an embodiment of the present invention, with Figure 1 being a front view and Figure 2 being a front view of the magnetron device.
Figure A-A' sectional view, Figure 3 is a perspective view of the heat dissipation fin,
FIG. 4 is a front view of a conventional magnetron device. 12...Cylindrical anode, 14...Output antenna, 15...Radiation fin having a T-shaped recess.

Claims (1)

[Scope of Claims] 1. An anode having an output antenna portion protruding in a direction perpendicular to the axis of a cylindrical anode body, and a portion of the anode located at the output antenna portion coaxially with the output antenna portion. a heat dissipation fin having a first recess disposed therein, and the heat dissipation fin is arranged from both sides of the anode body such that the first recess of the heat dissipation fin faces each other on both sides of the output antenna part. A magnetron device characterized by being assembled. 2. The radiation fin according to claim 1, wherein the heat dissipation fin has a second recess formed in a direction perpendicular to the direction in which the output antenna portion protrudes and in a direction opposite to the first recess. magnetron device. 3. The first recesses facing each other on both sides of the output antenna of the radiation fin are formed such that the groove width of the recess increases as the distance from the output antenna section increases. A magnetron device according to claim 1.