JPS6273529A - Magnetron device - Google Patents

Abstract

PURPOSE:To improve the cooling effect extensively, by making the spaces between the radiating fins equal. CONSTITUTION:By the second recessions 21 and 22 of radiating fins 15, the space 27 between the both radiating fins 15 and the space 28 between the fins 15 at the side of an output antenna 14 are almost equal. Since the recessions 20 near the output antenna 14 are formed so that the width L of the recessions is larger as they are apart from the antenna 14, the cooling air from the direction of the arrow flows between the radiating fins 15 with no resistance. The air flows between the fins 15 again while cooling the antenna 14, and exhausts from the magnetron device 11. Since the spaces between the radiating fins 15 are almost equal, no difference of static pressure occurs within the spaces, making the cooling air flow evenly through every space. As a result, the distributions of air flow and thermal radiation are made even.

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 OF THE INVENTION 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 main body 2, a magnet 6 disposed close to and coaxially with the anode main body 2, a mouth-shaped yoke 3 that connects the anode main body 2 and the magnet 6, and a side wall of the anode main body 2. An output antenna section 4 is provided at the bottom of the anode body 2 so as to protrude perpendicularly to the axis of the anode body 2, and the output antenna section 4 extends through a through hole (not shown) formed in the yoke 3. It's out. Furthermore, a plurality of flat heat radiation fins 5 having a cylindrical protruding wall portion 51 on the plate surface are press-fitted onto the outer surface of the anode body 2 so as to sandwich the output antenna portion 4 . A cooling fan (not shown) is used to cool the vicinity of the anode body 2, which becomes hot during the oscillation operation.

Problems to be Solved by the Invention However, in the conventional configuration described above, the flat radiation fin 5 is press-fitted to the anode 2 so as to sandwich the output antenna part 4. 5, 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. However, a static pressure difference occurs between spaces 7 and 8, and the cooling air from a cooling fan (not shown) flows more into space 8 where the static pressure is low, and conversely, into space 7 where the static pressure is high. Since it becomes difficult for the cooling air to flow, 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. Also,
As mentioned above, since a large space 8 is required, the anode 2 also becomes thick, which leads to problems such as an increase in the size of the entire Magnelon device 1.

A further means for solving the problem In order to achieve this object, the magnetron device H of the present invention is used.
5. An output antenna section is provided in a direction perpendicular to the axis of the cylindrical anode body, and a heat dissipation fin is provided that sandwiches the output antenna section and forms a recess in the cylindrical anode body so as to avoid the output antenna section. The recesses are arranged so as to face each other and are fitted and assembled.

Effect of the Invention With the above-described configuration, the present invention can uniformize the air flow distribution in the magnetron device to increase the amount of heat dissipation, eliminate thermal distortion, and make the device more compact by allowing the heat dissipation windows and ins to be closely arranged. .

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a magnetron device in a preferred embodiment of the present invention, and FIG. FIG. 3 is a perspective view of a radiation fin having first and second recesses.

1 to 3, an anode body 12, a magnet 16 disposed close to and coaxially with the anode body 12, and a mouth-shaped yoke that calmly connects the anode body 12 and the magnet 16. 13, an output antenna section 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 extends through it. Further, a plurality of heat radiation fins 16 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 16 has a cylindrical protruding wall portion 18 near its center that can fit into the anode body 12.
and a first recess 20 disposed coaxially with the output antenna section 14 of the anode main body 12.
is formed. The first recess 20 is formed to have a groove width slightly larger than the outer diameter of the output antenna section 14. Then, on both end sides in the direction perpendicular to the first recess 20, a second recess 21,
22 is formed. The radiation 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 constructed as described above will be described below.

When the magnetron device 11 is operated in oscillation, the anode main body 12 generates heat and the anode loss increases.τ, arrow 17
Cooling air is blown from a direction by a cooling fan (not shown) to cool the anode body 12. At this time, the second recesses 21 and 22 of the radiation fin 15 cause the radiation fin 16 to
The space 2A and the space 28 of the radiation fin 15 near the output antenna section 14 are approximately equal. In addition, since the recess 2o near the output antenna section 14 is formed so that its groove width 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 fins 16, cools the output antenna section 14, passes again between the radiation fins 15, and is emitted from the magnetron device 11. in this way,
Since the spaces between the radiation fins 15 are approximately equal, there is no difference in static pressure between the respective spaces, and the cooling air flows evenly to any space, making the air volume distribution and heat radiation distribution uniform. Furthermore, the airflow flowing through the recess 2o flows along the output antenna 14 and bends between the fins, so that the heat transfer performance is improved and the amount of heat radiation is increased.j~ The cooling effect of the magnetron device is significantly enhanced.

Further, since there is no extra space and the radiation fins 16 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 is provided with an output antenna section perpendicular to the axis of the cylindrical anode main body, and the output antenna is sandwiched between the output antenna section and the cylindrical anode (C recessed section). Since the heat dissipation fins are fitted together, the space between the heat dissipation fins becomes equal, the air volume distribution and heat dissipation distribution become uniform, and the amount of heat dissipation increases, so the cooling effect is significantly enhanced. Since the magnetrons can be arranged closely, it is possible to downsize the magnetron device, thereby realizing an excellent magnetron device.

[Brief explanation of drawings]

1 to 3 show a magnetron device according to an embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, and FIG. 3 is a perspective view of a radiation fin. , FIG. 4 is a front view of a conventional magnetron device. 12...Cylindrical anode, 14...Output antenna, 16...Radiation fin looking at the figure-7 shaped recess. Name of agent: Patent attorney Toshio Nakao and 1 other person/2
--Ichimonka & Anode book 3rd figure
15-11) Lost fin/&---Fl Takoji Aburibo Relocation

Claims (3)

[Claims] (1) An anode in which an output antenna part is protruded in a direction perpendicular to the axis of the cylindrical anode body, and a part of the anode located in the output antenna part is arranged coaxially with the output antenna part. a radiation fin having a first recess, and the radiation fin is assembled from both sides of the anode body such that the first recess of the radiation fin faces each other on both sides of the output antenna section. A magnetron device characterized by: (2) The radiation fin has a second recess formed in a direction perpendicular to the direction in which the output antenna section protrudes and opposite to the first recess.
Magnetron device as described in Section. (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.