CN101409200A

CN101409200A - Radiation fin structure for magnetron

Info

Publication number: CN101409200A
Application number: CNA2007100598180A
Authority: CN
Inventors: 王维
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2007-10-11
Filing date: 2007-10-11
Publication date: 2009-04-15

Abstract

The invention relates to a permatron radiating rib structure which comprises a main body with a circular hole at the middle, a plurality of zigzag fins that are connected with two sides of the main body, punched holes and lugs that are arranged on the main body and the fins. The permatron radiating rib structure increases the radiating area, uses the contact of air current more effectively, can achieve better radiating effect, avoids the temperature increase of an anode and ensures the normal work of the permatron, as the main body and the fins are provided with the structures of the punched holes and the lugs.

Description

The heat radiating fin structure of magnetron

Technical field

The invention belongs to the magnetron field.Particularly relate to and a kind ofly can increase area of dissipation, the magnetron heat radiating fin structure that anode is dispelled the heat better.

Background technology

To be electronics give the microwave tube of microwave electromagnetic field with the potential energy form with energy exchange with magnetron, is the vacuum device that produces the high-power high-frequency oscillation energy, uses on multiple utensils such as microwave oven.

Fig. 1 is the magnetron structures cutaway view of prior art.As shown in Figure 1, general, magnetron mainly includes: positive electrode portion; Negative electrode portion; Magnetic pole piece; The microwave emission part.Positive electrode portion is formed with a plurality of radial blades 12 by columnar anode can 11 on the inwall of anode can 11, welding inner and outer ring formation in the lower groove on the blade.

Negative electrode portion is included on the central shaft by form spiral-shaped of W (tungsten) and TH (thorium) element and can radiates thermionic filament 13; Between the end of blade 12 and filament 13, form the action space 14 that makes the hot electron rotation; In order to prevent to break away from from the central shaft above-below direction, form upper seal 15 and lower seal 16 in the top and bottom of filament 13 from the hot electron that filament 13 radiation are come out; For filament supports 13 and introduce power supply, designed the filament central authorities guide rod 17 that connects lower seal 16 and connect upper seal 15 and introduced power supply with central guide rod 17 and be connected the side guide rod 18 of lower seal 16.

Magnetic pole piece comprises the lower magnetic pole 21 that is fixed on anode can 11 lower ends; To form magnetic field in order making on the action space 14, magnet 22 to be installed in the upper end of anode can 11 and the lower end of lower magnetic pole 21.

In addition, connect ceramic component 31 and connect filament central authorities guide rod 17 1 ends and guide rod 18 1 ends in side carry out the filter coil 70 of filter function in addition; Connect filter coil 70, and the capacitor 36 of power supply is introduced in cross-over connection in both ends of power from the outside; The top seal chamber 41 and the lower seal chamber 42 of flux interaction carried out in the bottom that is formed on top and lower magnetic pole 21; For the high frequency waves in 14 li generations of action space are transmitted into the outside, are provided with and are connected blade 12 and connect the antenna 51 that top seal chamber 41 central authorities extract; Be provided with fin 61 in order to cool off the heat that produces and transmit 14 li of action spaces by blade 12; Go back the parts such as shell 19 that 61 protections of handlebar fin shed at heat inner and that fin 61 is transmitted in addition.Fin 61 is arranged between shell 19 inner peripheral surfaces and anode can 11 outer peripheral faces.

Shell 19 comprises from upside and holds the upper casing 19a of interior arrangement and hold the lower casing 19b of interior arrangement from downside.

Blast pipe 60 shown in the figure is after the magnetron assembling, when carrying out deairing step for magnetron being become the part that vacuum state cuts off.

The following describes aforesaid magnetron working condition.When the magnetic field that magnet 22 produces forms magnetic flux by lower magnetic pole 21, between blade 12 and filament 13, form magnetic field.When switching on by capacitor 36, filament 13 is approximately radiating hot electron under the 2000K temperature, and hot electron is rotated to 4.4KV and the action space 14 under the effect in the magnetic field that magnet 22 produces at the 4.0KV between filament 13 and the positive electrode portion.

Like this, passing through central guide rod 17 and side guide rod 18 in filament 13 energisings, at the electric field that produces between blade 12 and the filament 13 about 2450MHZ, make hot electron in action space 14, become high frequency waves under the effect by electric field and magnetic field, and the antenna 51 that makes high frequency waves be delivered to connection blade 12 is transmitted into the outside.

Fig. 2 is the fin front view of prior art; Fig. 3 is a prior art fin vertical view.

The fin 61 of prior art is as Fig. 2, shown in Figure 3, and fin is had the main body 1 of circular hole 2 and the fin 3 of a plurality of warpages that are connected with the main body both sides to constitute by the centre.This structure has the space of improvement.

But there are the following problems for the anode radiator of prior art:

Present anode radiator is simple in structure, and radiating effect is general, causes the too high phenomenon of temperature of anode to take place easily, can cause magnetron natural resonance pattern mode hopping when temperature of anode is too high, influences the normal use of magnetron.

Summary of the invention

The present invention can increase area of dissipation, the magnetron heat radiating fin structure that anode is dispelled the heat better for the technical problem that exists in the solution known technology provides a kind of.

The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is:

The heat radiating fin structure of magnetron of the present invention comprises: middle round-meshed main body; The fin of a plurality of warpages that are connected with the main body both sides; On main body and fin, have punching and lug.

Described punching and lug are one-shot formings.

The distribution of both sides punching of described main body and lug is a symmetry with main center's line.

The direction that described lug is upturned is a symmetry with main center's line.

The quantity of described punching and lug is at least 2.

Advantage and good effect that the present invention has are:

The heat radiating fin structure of magnetron of the present invention owing to have punching and tab structures on main body and fin, has increased area of dissipation, more effectively utilized simultaneously the contact of air-flow, can reach better radiating effect, avoid the generation of temperature of anode rising, guarantee the operate as normal of magnetron.

Description of drawings

Fig. 1 is the magnetron structures cutaway view of prior art;

Fig. 2 is the fin front view of prior art;

Fig. 3 is the fin vertical view of prior art;

Fig. 4 is a fin front view of the present invention;

Fig. 5 is a fin vertical view of the present invention;

Fig. 6 is the A-A profile of fin of the present invention;

Fig. 7 is the B-B cutaway view of fin of the present invention.

Critical piece symbol description in the accompanying drawing:

1: main body 2: circular hole

3: fin 4: punching

5: lug 11: anode can

12: blade 13: filament

14: action space 15: upper seal

16: lower seal 17: central guide rod

18: side guide rod 19: shell

21: lower magnetic pole 22: magnet

36: capacitor 41: the top seal chamber

42: lower seal chamber 51: antenna

60: blast pipe 61: fin

70: filter coil

Embodiment

It is following that the present invention will be described in detail with reference to drawings and Examples.

Parts same as the prior art have used identical symbol among the present invention.

Fig. 4 is a fin front view of the present invention; Fig. 5 is a fin vertical view of the present invention; Fig. 6 is the A-A profile of fin of the present invention; Fig. 7 is the B-B cutaway view of fin of the present invention.

The heat radiating fin structure of magnetron of the present invention such as Fig. 4 are to shown in Figure 7, and heat radiating fin structure is had the main body 1 of circular hole 2 and the fin 3 of a plurality of warpages that are connected with the main body both sides to constitute by the centre; And on main body and fin, have punching 4 and a lug 5.

Punching and lug are one-shot formings.

The distribution of punching of main body both sides and lug is a symmetry with main center's line.

The direction that lug is upturned is a symmetry with main center's line.

The quantity of punching and lug is at least 2.

The position of punching and lug, quantity should be able to guarantee the intensity of fin and be provided with.

Owing on main body and fin, have punching and tab structures, increased area of dissipation, more effectively utilized the contact of air-flow simultaneously, can reach better radiating effect, avoid the generation of temperature of anode rising, guaranteed the operate as normal of magnetron.

Claims

1, a kind of heat radiating fin structure of magnetron comprises: there is the main body 1 of circular hole 2 centre; The fin 3 of a plurality of warpages that are connected with the main body both sides; It is characterized in that on main body and fin, having punching 4 and lug 5.

2, the heat radiating fin structure of magnetron according to claim 1 is characterized in that punching and lug are one-shot formings.

3, the heat radiating fin structure of magnetron according to claim 1 is characterized in that the distribution of punching of main body both sides and lug is a symmetry with main center's line.

4, the heat radiating fin structure of magnetron according to claim 1 is characterized in that the direction that lug is upturned is a symmetry with main center's line.

5, the heat radiating fin structure of magnetron according to claim 1 is characterized in that the quantity of punching and lug is at least 2.