CN1591749A - Cooling fin structure of magnetron - Google Patents
Cooling fin structure of magnetron Download PDFInfo
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- CN1591749A CN1591749A CN 03144172 CN03144172A CN1591749A CN 1591749 A CN1591749 A CN 1591749A CN 03144172 CN03144172 CN 03144172 CN 03144172 A CN03144172 A CN 03144172A CN 1591749 A CN1591749 A CN 1591749A
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- magnetron
- heat
- cooling fins
- anode
- cooling fin
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Abstract
The persent invention discloses a cooling fin structure of magnetron, belonging to collector cooling device of magnetron. In the magnetron whose cooling fin for radiating heat is pressed into outer side of another tank the heat-radiating vane can be integrally formed on the somatic portion of cooling fin mounted on the outer side of anode tank, so that the heat quantity produced on anode tank can be transferred through somatic portion of cooling fin, and the heat quantity transferred into the somatic portion can be simultaneously radiated by means of all the heat-radiating vanes, threrefore it can avoid imperfect contact in cooling fin, and can effectively release heat.
Description
Technical field
The invention relates to magnetron collector cooling device, more detail is about cooling fins integrally formed and make the cooling fins structure of the magnetron that exothermal efficiency rises.
Background technology
As everyone knows, magnetron is mounted on microwave oven or the lighting fixture and electric energy is converted to device as high frequency energy such as microwaves.
The magnetron of existing structure is shown on Fig. 1 and Fig. 2, and as following, simple declaration has magnetron structures now.
As shown in the figure, yoke (1) inboard of top yoke (1a) and bottom yoke (1b) formation " " font is provided with the cylindrical shape anode can (2) with making such as copper pipes, and anode can (2) is inner promisingly brings out radio-frequency component and forms the plurality of vanes (3) of resonator to equidistant setting of axis direction, and the front end top and the bottom of blade (3) are combined with inboard grading ring (4) and outside grading ring (5) separately by turns.Therefore form anode portion by anode can (2) and blade (3).
And the central shaft of anode can (2) is provided with to forming the coiled-coil filament (7) of a determining deviation working space (6) with blade (3) front end, and filament (7) is that mixture by tungsten and thorium oxide forms.Therefore filament is to launch thermionic negative electrode by the operating current heating of conducting to form.
For the upwards radiation of hot electron that prevents to launch, the upper end of filament (7) is fixed with protective cover (8); For the hot electron that prevents to launch radiates downwards, the bottom of filament (7) is fixed with end shield (9); And insert in the through hole of end shield (9) central authorities molybdenum materials matter center conductor (10) and in conjunction be fixed on protective cover (8) below, and end shield (9) below in conjunction with subpolygon (11) upper end that is fixed with center conductor (10) molybdenum materials matter at a certain distance.
Be combined with the funnel shaped magnetic pole (13) and the lower magnetic pole (14) gone up of magnetic in the upper and lower side opening portion of anode can (2), and on magnetic pole (13) upside and lower magnetic pole (14) downside separately soldering A-chamber (15) and F-chamber (16) of drum are arranged; But the oriented outside F-pottery (18) that transmits the A-pottery (17) of high frequency and play insulating effect of A-chamber (15) upside and F-chamber (16) downside soldering, and the upside soldering of A-pottery (17) has blast pipe (19), and for the inner sealing of anode can (2) is become vacuum state, the upper end of blast pipe (19) cuts off, simultaneously welding.
And the inboard of above-mentioned A-chamber (15) is provided with the antenna (20) of the high frequency that promising output generates in resonator, and the bottom of antenna (20) is connected on the blade, and upper antenna end portion is fixed on the inner crest face of blast pipe (19).
Be combined with the upper magnet (21) and the bottom magnet (22) that contact with yoke (1) medial surface on the upper and lower side of anode can (2), therefore form magnetic circuit with upper and lower magnetic pole (13), (14).
And, yoke (1) downside is combined with filter case (26), and filter case (26) inboard is provided with the 1 pair choke (27) of reduction to the High-frequency Interference of input part adverse current, but a terminal circuit of above-mentioned 1 pair of choke (27) is connected the lower end of inserting 1 pair of F-lead (28) of combination in the through hole on the F-pottery (18).
F-lead (28) upper end of inserting combination in the through hole of F-pottery (18) is combined in below 1 pair of disk (29) of F-pottery (18) upside separately, and is combined with center conductor (10) and subpolygon (11) above the disk (29) separately.
Filter case (26) sidewall is provided with electric capacity (31), and electric capacity (31) medial end is connected with choke (27) circuit, and the ferrite (32) that promising absorbing high-frequency disturbs is inserted to length direction in choke (27) lining.
And, be provided with cooling fins (41) between yoke (1) inner peripheral surface and anode can (2) outer peripheral face, and the upside of A-pottery (17) covers the antenna cover (42) of promising protection blast pipe (19) joint portion.
Existing magnetron as above-mentioned formation is conducting to center conductor (10) and subpolygon (11) to external power source by F-pottery (18), and by importing operating current to filament (7) by the closed circuit of F-lead (28), center conductor (10), filament (7), protective cover (8), end shield (9), subpolygon (11), disk (29) formation, therefore filament (7) generates heat and heat of emission electronics, and forms electronic population as the above-mentioned hot electron of emission that makes.
The driving voltage that is conducting to anode by subpolygon (11) forms very strong electric field in working space (6); And guide working space (6) side by the flux that above-mentioned upper magnet (21) and bottom magnet (22) produce into along lower magnetic pole (14), therefore move to magnetic pole (13) and in working space (6), form very strong magnetic field by working space (6).
Be subjected to strong electric field effects in the working space (6) on the filament (7) of high temperature surface to the hot electron of working space (6) internal emission, accept the power of vertical direction in the influence that when blade (3) direction moves, is subjected to very strong magnetic field, so hot electron spirality circular motion and arriving on the blade (3).
The electronic population that is formed by electron motion influences blade (3) with cycle of 1 of the inverse branch of periodic high-frequency emission wavelength multiple; And under above-mentioned effect, the space on the mutual opposite between the blade (3) both in the resonator mutually between the blade (3) on opposite the electric capacity of the static capacity of effect on circuit, constitute resonant circuit arranged side by side with blade (3) with the induction coefficient that the anode can 2 that is connected these forms by above-mentioned mutual opposite, so resonance frequency is to be induced from blade (3) by the high frequency that f=1/ (2 π √ LC) determines; And make food molecule vibrate 2,400,000,000 5 thousand ten thousand times by antenna (20) to outside radiation, and utilize consequent frictional heat cooking food at per second as the above-mentioned high frequency that induces.
And radiating with 2.45GHz as above-mentioned magnetron is the microwave of fundamental frequency, but as the high frequency that comprises the integral multiple of fundamental frequency in the above-mentioned microwave that radiates.If these radiation high frequencies are leaked to the outside, just influence communication signal; Particularly the 5th high frequency (12.25GHz) is the factor that influences satellite communication; And therefore the 5th such high frequency passes through center conductor (10) and subpolygon (11) and F-lead (28) to the input side adverse current because filament (7) becomes antenna; The 5th high frequency of adverse current is set at the inboard choke (27) of filter case (26) and L, the C between the electric capacity (31) is eliminated like this, and prevents that by filter case (26) the 5th high frequency is to external leaks.
Fig. 3 is the cut-away section structure chart of existing cooling fins confined state.As shown in the figure, above-mentioned cooling fins (41) is formed with the joggling part (41a) of " " shape warpage at medial end, and these cooling fins (41) are pressed into a plurality of cooling fins (41) on the outer peripheral face of anode can (2) when assembling in order one by one.
But, be that a plurality of cooling fins (41) are pressed into its assembled form on the anode can (2) as the existing magnetron of above-mentioned formation; Therefore when work, anode can (2) goes up the heat that produces radiates to the outside by each cooling fins (41).So when in cooling fins (41), loose contact being arranged, the radiate heat that above-mentioned cooling fins (41) can not be smooth, thereby can not the efficient emission heat.
Summary of the invention
The present invention is radiated away by cooling fins well in order to address the above problem invention, its objective is the heat that is provided at the anode can generation, thereby can improve the cooling fins structure of the magnetron of exothermal efficiency.
In order to achieve the above object, the cooling fins structure of magnetron provided by the invention comprises in the magnetron cooling fins that is pressed in the outside of anode can to radiate heat; Its cooling fins is to constitute by the body portion that is pressed into the anode can outer peripheral face with at the diffusing leaf of at least 2 integrally formed heat releases of the outer peripheral face of body portion.
The cooling fins structure of magnetron of the present invention, leaf is integrally formed in the cooling fins body portion of anode can outside assembling because heat release is loose, therefore the heat that produces on the anode can is passed on by the body portion of cooling fins, the heat that meanwhile is communicated to body portion radiates simultaneously by a plurality of heat releases leaf that looses, so radiate heat effectively.
Description of drawings
Fig. 1 is the appearance assumption diagram of the cooling fins structure of existing magnetron.
Fig. 2 is the vertical section structure figure of Fig. 1.
Fig. 3 is the cut-away section structure chart of existing cooling fins confined state.
Fig. 4 is the magnetron vertical section structure figure of cooling fins structure of the present invention.
Fig. 5 is the cut-away section structure chart of cooling fins confined state of the present invention.
Fig. 6 is the cut-away section structure chart of radiate heat state in the structure of the present invention.
Below be the explanation of major part symbol among the figure:
2: anode can, 100: cooling fins,
101: body portion, 102: the heat release leaf that looses.
Embodiment
Following with reference to drawings and Examples to the detailed description of the invention.
Fig. 4 is the magnetron vertical section structure figure of cooling fins structure of the present invention; Fig. 5 is the cut-away section structure chart of cooling fins confined state of the present invention.
As shown in the figure, the cooling fins (100) that is combined on anode can (2) outside of the present invention is by the body portion (101) that is pressed into anode can (2) outer peripheral face; Integrally formed and be sent to outside a plurality of heat releases leaf (102) that looses by the heat that body portion (101) passes on and constitute at the outer peripheral face of body portion (101).
When the work, the heat that anode can (2) produces is communicated to the body portion (101) of cooling fins (100) as the magnetron of the present invention of above-mentioned formation, and the heat that meanwhile is communicated to body portion (101) emits to the outside by the diffusing leaf (102) of a plurality of heat releases.Therefore shown in arrow among Fig. 6, carry out heat release simultaneously by whole heat releases leaf (102) that looses, therefore radiate heat effectively.
Claims (1)
1. the cooling fins structure of a magnetron, comprise the cooling fins that is pressed into promising radiate heat in the magnetron in the outside of anode can, it is characterized in that cooling fins is to constitute by the body portion that is pressed into the anode can outer peripheral face with at the diffusing leaf of at least 2 integrally formed heat releases of the outer peripheral face of body portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03144172 CN1591749A (en) | 2003-08-26 | 2003-08-26 | Cooling fin structure of magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03144172 CN1591749A (en) | 2003-08-26 | 2003-08-26 | Cooling fin structure of magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1591749A true CN1591749A (en) | 2005-03-09 |
Family
ID=34597447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03144172 Pending CN1591749A (en) | 2003-08-26 | 2003-08-26 | Cooling fin structure of magnetron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1591749A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364516A (en) * | 2007-08-08 | 2009-02-11 | 松下电器产业株式会社 | Magnetron |
-
2003
- 2003-08-26 CN CN 03144172 patent/CN1591749A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364516A (en) * | 2007-08-08 | 2009-02-11 | 松下电器产业株式会社 | Magnetron |
| CN101364516B (en) * | 2007-08-08 | 2013-01-02 | 松下电器产业株式会社 | Magnetron |
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