CN1591750A - Wire Structure for magnetron - Google Patents
Wire Structure for magnetron Download PDFInfo
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- CN1591750A CN1591750A CN 03144173 CN03144173A CN1591750A CN 1591750 A CN1591750 A CN 1591750A CN 03144173 CN03144173 CN 03144173 CN 03144173 A CN03144173 A CN 03144173A CN 1591750 A CN1591750 A CN 1591750A
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- magnetron
- conductor
- center conductor
- subpolygon
- diameter
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Abstract
The present invention discloses a conductor structure of magnetron, belonging to circuit device of magnetron. Said invention is characterized by that in the magnetron in whose central conductor through tail end protective cover the upper end of auxiliary conductor is inserted and combined in the lower portion of said tail end protective cover. In consideration of vibration frequency of central conductor and auxiliary conductor the diameter of central conductor is designed to be larger than that of auxiliary conductor, so that after the central condcutor and auxiliary conductor are assembled in the tail end protective cover, the impact to be applied in the next engineering can not be centralized on the central conductor, therefore it can prevent circuit breakage of central conductor and imperfect quality resulted from circuit breaking in engineering process.
Description
Technical field
The invention relates to the circuit arrangement of magnetron, more detailed is shock-resistant about center conductor and subpolygon are designed to, and can prevent to be caused by impact in engineering moves the conductor structure of damaged magnetron.
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.
See figures.1.and.2, 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 the working space (6) of a determining deviation 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.
As shown in Figure 3, above-mentioned center conductor (10) connects end shield (9) and forms to length direction, and the upper end of subpolygon (11) be combined in end shield (9) below, and the diameter of center conductor (10) and subpolygon (11) all is 1.5mm.
But, as the existing magnetron of above-mentioned formation when the assembling, as shown in Figure 3, end shield (9) and center conductor (10) and subpolygon (11) under the state that has assembled when next engineering moves, center conductor (10) opens circuit owing to being subjected to the impact that the outside applies, and therefore has and brings out the bad phenomenon of quality.
Summary of the invention
The present invention invents in order to address the above problem, and its objective is to be provided to prevent that center conductor from opening circuit when mobile, thereby prevents the conductor structure of the magnetron of quality bad phenomenon.
In order to achieve the above object, the conductor structure of magnetron provided by the invention, comprise center conductor connect insert in the end shield in conjunction with and endways guard shield below in conjunction with the magnetron that the subpolygon upper end is arranged, consider center conductor and subpolygon intrinsic vibration number separately, possess not the diameter that has nothing in common with each other that can open circuit because of external impact.
The conductor structure of magnetron of the present invention is considered the vibration frequency of center conductor and subpolygon, and the diameter of center conductor is designed to bigger than subpolygon diameter.Therefore assembled on the end shield behind center conductor and the subpolygon when next engineering moves, the impact that applies is not concentrated on the center conductor, opens circuit so prevent center conductor, can prevent that engineering from bringing out the bad effect of quality that opens circuit and cause in carrying out so have.
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 vertical section structure figure that existing center conductor and subpolygon are provided with state.
Fig. 4 is magnetron vertical section structure figure of the present invention.
Fig. 5 is the vertical section structure figure that center conductor of the present invention and subpolygon are provided with state.
The explanation of major part symbol among the figure:
2: end shield, 100: center conductor,
101: subpolygon.
Embodiment
It is following that the present invention is described in detail with reference to drawings and Examples.
Shown in Fig. 4,5, the present invention designs the diameter of different center conductor (100) and subpolygon (110), prevents the impact coefficient breakage that center conductor (100) is caused by vibration frequency.If when the diameter of center conductor (100) is 1.5mm, the diameter of subpolygon (110) is designed to about 1.3mm; Therefore the difference by vibration frequency prevents that center conductor (100) from opening circuit.
The present invention as above-mentioned formation has assembled end shield (9) and center conductor (100) and subpolygon (110) back when next engineering moves, and center conductor (100) and subpolygon (110) are impacted.At this moment, consider center conductor (100) and subpolygon (110) vibration frequency separately, the diameter of center conductor (100) is designed to bigger than subpolygon (110) diameter.Therefore impact not being concentrated on the center conductor (100), so can prevent to impact the breakage that causes.
Claims (2)
1. the conductor structure of a magnetron, comprise center conductor connect insert in the end shield in conjunction with and endways guard shield below in conjunction with the magnetron that the subpolygon upper end is arranged, it is characterized in that considering center conductor and subpolygon intrinsic vibration number separately, possess not the diameter that has nothing in common with each other that can open circuit because of external impact.
2. the conductor structure of magnetron according to claim 1 is characterized in that the center conductor diameter subpolygon diameter that compares is big.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03144173 CN1591750A (en) | 2003-08-26 | 2003-08-26 | Wire Structure for magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03144173 CN1591750A (en) | 2003-08-26 | 2003-08-26 | Wire Structure for magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1591750A true CN1591750A (en) | 2005-03-09 |
Family
ID=34597448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03144173 Pending CN1591750A (en) | 2003-08-26 | 2003-08-26 | Wire Structure for magnetron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1591750A (en) |
-
2003
- 2003-08-26 CN CN 03144173 patent/CN1591750A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |