CN100514537C - Structure of magnetic pole in magnetron - Google Patents
Structure of magnetic pole in magnetron Download PDFInfo
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- CN100514537C CN100514537C CNB2004100940418A CN200410094041A CN100514537C CN 100514537 C CN100514537 C CN 100514537C CN B2004100940418 A CNB2004100940418 A CN B2004100940418A CN 200410094041 A CN200410094041 A CN 200410094041A CN 100514537 C CN100514537 C CN 100514537C
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Abstract
The magnetron possesses following structures: an anode barrel is installed inside magnetic yoke blades arranged in rediatiform are installed inside anode barrel; the anode barrel and blades constitute anode art capable of generating energy in high frequency in the magnetron; being installed on central axis of anode barrel, filament apart from front ends of blades in certain gap can gave off hot electrons so as to constitute cathode part of the magnetron; upper/lower magnetic poles are installed above/under the anode barrel respectively; upper/lower magnets are installed above/under the upper/lower magnetic poles respectively so as to form loop of magnetic field. The magnetron also possesses antenna passing through upper magnetic pole. The antenna is in use for outputting high frequency oscillation. Being symmetrical to each other, the upper and lower magnetic poles form roundness in order to centralize energy of magnetic field to acting space.
Description
Technical field
The present invention relates to a kind of structure of magnetic pole of magnetron.
Background technology
As everyone knows, magnetron is a kind of being installed in the equipment such as microwave oven or lighting apparatus, electric energy can be changed into the device of the such high-frequency energy of microwave.
Magnetron is generally by forming with the lower part, i.e. anode portion, and it is by the anodal barrel of the inside that is installed in the yoke that has constituted the magnetron body, cylindrical shape and be installed in anodal barrel inside, several blades of having formed common resonator constitute; Negative pole part, it is made of the filament at the center that is installed in above-mentioned anodal barrel, and the front end of this filament and blade can discharge hot electron at a distance of certain intervals; And the upper and lower part magnetic pole and the upper and lower part magnet that are installed in the upper and lower of above-mentioned anodal barrel, they can form field circuit with yoke.
Magnetron with said structure is being connected under the high-tension situation, and filament can discharge electronics.And because the magnetic field energy of upper and lower part magnet is concentrated to action space, therefore in action space, electronic population can interact with magnetic field energy, is the electromagnetic energy of 2450Mhz thereby generate fundamental frequency.Such high-frequency energy can pass through the cooking room internal emission of the sky alignment microwave oven of efferent, thereby realizes the purpose of cooking food.
But in having the existing magnetron of said structure, the magnetic line of force that upper and lower part magnet is produced can not be concentrated to action space through after the magnetic pole of upper and lower part, therefore wants to improve output and efficient by magnetic field concentration, also has certain limitation.This is existing in prior technology problem just also.
Summary of the invention
In order to overcome the above-mentioned shortcoming that prior art exists, the invention provides a kind of structure of magnetic pole of magnetron, it can make more and concentrate to action space through the magnetic line of force of upper and lower part magnetic pole, thereby makes magnetic field concentration, and the output that increases magnetron thus, raise the efficiency.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of structure of magnetic pole of magnetron, it is characterized in that: this magnetron has following structure, anodal barrel is equipped with in the inside that is yoke, and several blades that is radial arrangement are equipped with in the inside of this anodal barrel, thereby this anodal barrel and blade have constituted the anode portion that can produce high-frequency energy together; On the central shaft of above-mentioned anodal barrel filament is housed, in order to form certain action space, the front end of filament and blade is at a distance of certain intervals, and this filament can discharge hot electron, thereby constitutes the negative pole part of magnetron; The upper and lower of above-mentioned anodal barrel is equipped with the upper and lower part magnetic pole, and the upper and lower of this upper magnetic pole and bottom magnetic pole is equipped with upper magnet and bottom magnet respectively, thereby they can form field circuit; In addition, also possess the antenna that has passed above-mentioned upper magnetic pole in the magnetron, this antenna is used for exporting the higher-order of oscillation, in this magnetron, concentrates to action space in order to make magnetic field energy, and above-mentioned upper magnetic pole and bottom magnetic pole rounded (round) are also symmetrical.
The structure of magnetic pole of aforesaid magnetron has also formed protuberance on its middle and lower part magnetic pole.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the end view of the structure of magnetron of the present invention
Fig. 2 is a longitdinal cross-section diagram shown in Figure 1
Fig. 3 is the longitdinal cross-section diagram of bottom of the present invention magnetic pole
Fig. 4 is the schematic diagram of the field circuit that forms in the magnetron of structure of the present invention
The number in the figure explanation:
101: yoke (yoke) 102: anodal barrel
103: blade (vane) 106: action space
107: filament (filament) 113: upper magnetic pole
113a, 114a: protuberance 114: bottom magnetic pole
120: antenna 121: upper magnet
122: bottom magnet
Embodiment
As shown in Figure 1, 2, yoke (101) is formed by connecting by top yoke (101a) and bottom yoke (101b), roughly be " mouth " font, the anodal barrel (cylinder) (102) of drum is equipped with in the inside of such yoke (101), the inside of above-mentioned anodal barrel (102) has several blades (vane) (103) to be radial arrangement towards axis direction, these blades (103) have formed common resonator, therefore can motivate radio-frequency component.The front end of above-mentioned blade (103) is connecting inboard grading ring (104) and outside grading ring (105) respectively, above-mentioned inboard grading ring (104) and outside grading ring (105) can be respectively replacing with the upper and lower part of above-mentioned blade (103) to be realized continuing, and above-mentioned like this anodal barrel (102) and blade (103) have just been formed anode portion (ANODE).
In addition, be equipped with on the central shaft of above-mentioned anodal barrel (102) and be wound in spiral-shaped filament (filament) (107), at a distance of certain interval, thereby formed certain action space (106) between the front end of above-mentioned filament (107) and blade (103).Above-mentioned filament (107) is made by the mixture of tungsten and thorium oxide, and it has constituted negative pole part (CATHODE), can be heated under the effect of drive current, thereby discharge hot electron.
In addition, upper seal (top sealed) (108) is equipped with in the upper end of above-mentioned filament (107), and it can prevent that the hot electron that discharges from radiating upward; Lower seal (end sealed) (109) is equipped with in the lower end of above-mentioned filament (107), and it can prevent that the hot electron that discharges from radiating downwards.Be formed centrally through hole in the above-mentioned lower seal (109), the sensor conductor (sensor lead) (110) that useful Mo is made in the through hole inserts wherein, and the sensor lead (110) is fixedly connected on the bottom surface of above-mentioned upper seal (108).Have the upper end of side lead (side lead) (111) in the above fixedly connected on the bottom surface of above-mentioned lower seal (109), this side lead (111) and the sensor lead (110) are also made with Mo at a distance of certain interval.
In addition, the upper and lower opening of above-mentioned anodal barrel (102) is connecting with magnetic material on partly and is making, is being funnel shaped upper magnetic pole (113) and bottom magnetic pole (114); The lower end of the upper end of above-mentioned upper magnetic pole (113) and bottom magnetic pole (114) is being connected the A-capping (115) and the F-capping (116) of drum respectively by method for brazing (brazing); The upper end of above-mentioned A-capping (115) is connecting the A-ceramic body (ceramic) (117) that is used for to the outside output higher-order of oscillation by method for brazing, and the lower end of above-mentioned F-capping (116) is connecting by method for brazing and is used for heat insulation F-ceramic body (ceramic) (118).The upper end of above-mentioned A-ceramic body (117) is connecting blast pipe (119) by method for brazing, and for the inner sealing with above-mentioned anodal barrel (102) becomes vacuum state, and the upper end of above-mentioned blast pipe (119) is blocked and involution.
In addition, antenna (antenna) (120) is equipped with in the inside of above-mentioned A-capping (115), and this antenna (120) is used for exporting the higher-order of oscillation that is produced in the common resonator.Continue on some blades (103) in the lower end of above-mentioned antenna (120), the upper end then is fixed on the inside top of above-mentioned blast pipe (119).
In addition, the above and below of above-mentioned anodal barrel (102) is connecting upper magnet (121) and bottom magnet (122) respectively, and above-mentioned upper magnet (121) and bottom magnet (122) contact with the inner surface of yoke (101), so they can form magnetic field with above-mentioned upper and lower part magnetic pole (113) (114).
In addition, the below of above-mentioned yoke (101) is connecting the filter hut (filter box) (126) that is box (box) shape, a pair of choke (chokecoil) (127) is equipped with in the inside of above-mentioned filter hut (126), and this a pair of choke (127) can make high-frequency noise (noise) decay to the input part adverse current.In addition, an end of above-mentioned a pair of choke (127) keeps being electrically connected with the lower end of a pair of F-lead (128), and wherein above-mentioned a pair of F-lead (128) can insert and be connected in above-mentioned F-ceramic body (118) is gone up the through hole that forms.
The upper end that insertion is connected to the F-lead (128) in the through hole of above-mentioned F-ceramic body (118) is connected on the bottom surface of pair of discs (disk) (129), wherein above-mentioned pair of discs (129) is installed in the top of above-mentioned F-ceramic body (118), and the top of above-mentioned pair of discs (129) is connecting the lower end of the sensor lead (110) and side lead (111) respectively.
Capacitor (capacitor) (131) is housed on the sidewall of above-mentioned filter hut (126), the inside end of above-mentioned capacitor (131) keeps being electrically connected with above-mentioned choke (127), inserting FERRITE CORE (ferrite) (132) in the above-mentioned choke (127) along its length, this FERRITE CORE (132) is used for absorbing low-frequency noise.
Cooling fin (141) is housed between the outer surface of the inner surface of above-mentioned yoke (101) and anodal barrel (102), and the radome (antenna cap) (142) of the involution portion that is used for protecting blast pipe (119) is equipped with in the top of above-mentioned A-ceramic body (117).
Above-mentioned upper magnetic pole (113) and bottom magnetic pole (114) rounded (round) are also symmetrical, magnetic line of force process upper magnetic pole (113) and bottom magnetic pole (114) and concentrated to action space (106) that this structure can make upper and lower part magnet (121) (122) be produced.In addition, the end of above-mentioned upper magnetic pole (113) and bottom magnetic pole (114) has also formed protuberance (113a) (114a), therefore can further make magnetic field more concentrated.
Common magnetron with said structure is work like this, at first external power source can be switched to sensor conductor (110) and side lead (111) by F lead (128), thereby form the closed-circuit that constitutes by F-lead (128), sensor conductor (110), filament (107), upper seal (108), lower seal (109), side lead (111), disk (129), drive current is switched on the filament (107).Under the effect of the drive current of connecting like this, filament (107) can be heated, thereby discharges hot electron, and these hot electrons that discharge can form electronic population.
In addition, under the effect of the driving voltage that is switched to anode portion by side lead (111), can form highfield in the action space (106), the magnetic flux (flux) that is produced by upper magnet (121) and bottom magnet (122) can be drawn towards action space (106) along bottom magnetic pole (114), pass action space (106) then and move towards upper magnetic pole (113), thereby in action space (106), form high-intensity magnetic field.
Be discharged under the effect of the highfield of hot electron in action space (106) in the action space (106) from filament (107) surface of high temperature, can flow to blade (103), and in the process of advancing, meeting is under the effect of the vertical of high-intensity magnetic field, the shape of spinning motion arrives blade (103) at last.
The electronic population that forms by electronic motion can be the cycle blade (103) to be produced to disturb with multiple/one of higher-order of oscillation frequency like this, under the effect of this interference, space between the relative blade of direction (103) is just to have electric capacity (capacitance) composition in the resonator and inductance (inductance) composition constitutes antiresonant circuit on circuit, wherein above-mentioned capacitive component refers to the capacitive component that acts on the static capacity between the relative blade of direction (103), and the inductance composition refers to the inductance composition that is made of relative blade of above-mentioned direction (103) and anodal barrel (102) that blade is coupled together.So, will motivate the higher-order of oscillation, and the resonance frequency of the higher-order of oscillation by following formula promptly from blade (103)
Draw.The higher-order of oscillation that motivates like this can pass through antenna (120) to external emission, thereby makes the hydrone per second in the food produce 2,400,000,000 5 thousand ten thousand vibrations, so, just can come cooking food by the frictional heat that the hydrone vibration is produced.
In addition, because as mentioned above, upper and lower part magnetic pole (113) (114) rounded (round) is also installed symmetrically, also formed protuberance (113a) simultaneously (114a), concentrate to action space (106) by such upper and lower part magnetic pole (113) (114) in the magnetic field that upper and lower part magnet (121) (122) is produced, thereby increase the high frequency output of magnetron significantly, raise the efficiency.
That is to say that shown in the schematic diagram of the field circuit of the magnetron of Fig. 4, the magnetron that possesses structure of the present invention can make the magnetic line of force concentrate to action space, therefore can further strengthen the effect of magnetic field concentration.
The effect of invention
As mentioned above, in the structure of magnetic pole of magnetron of the present invention, top magnetic pole and bottom magnetic pole are rounded (round) also symmetrically, also formed simultaneously protuberance, therefore upper and lower part magnet has been produced The magnetic line of force of giving birth to concentrates through the upper and lower part magnetic pole and to action space, thereby improves significantly magnetron Output and efficient.
Claims (2)
1, a kind of structure of magnetic pole of magnetron, it is characterized in that, this magnetron has following structure, anodal barrel is equipped with in the inside that is yoke, several blades that is radial arrangement are equipped with in the inside of this anodal barrel, thereby this anodal barrel and blade have constituted the anode portion that can produce high-frequency energy together; On the central shaft of above-mentioned anodal barrel filament is housed, in order to form certain action space, the front end of filament and blade is at a distance of certain intervals, and this filament can discharge hot electron, thereby constitutes the negative pole part of magnetron; The upper and lower of above-mentioned anodal barrel is equipped with the upper and lower part magnetic pole, and the upper and lower of this upper magnetic pole and bottom magnetic pole is equipped with upper magnet and bottom magnet respectively, thereby they can form field circuit; In addition, also possess the antenna that has passed above-mentioned upper magnetic pole in the magnetron, this antenna is used for exporting the higher-order of oscillation, in this magnetron, concentrates to action space in order to make magnetic field energy, and above-mentioned upper magnetic pole and bottom magnetic pole are rounded to be symmetrical.
2, the structure of magnetic pole of magnetron according to claim 1 is characterized in that also having formed protuberance on the magnetic pole of above-mentioned bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100940418A CN100514537C (en) | 2004-12-27 | 2004-12-27 | Structure of magnetic pole in magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100940418A CN100514537C (en) | 2004-12-27 | 2004-12-27 | Structure of magnetic pole in magnetron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1797675A CN1797675A (en) | 2006-07-05 |
| CN100514537C true CN100514537C (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100940418A Expired - Fee Related CN100514537C (en) | 2004-12-27 | 2004-12-27 | Structure of magnetic pole in magnetron |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5171010B2 (en) * | 2006-10-27 | 2013-03-27 | 東京エレクトロン株式会社 | Power supply device, microwave generator using the same, and computer program |
| KR100857601B1 (en) * | 2007-04-03 | 2008-09-09 | 삼성전자주식회사 | Magnetron and electromagnetic wave shielding gasket |
| CN102054646B (en) * | 2010-12-02 | 2015-12-16 | 广东格兰仕集团有限公司 | A kind of eight chamber low-power magnetron and design procedures thereof |
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| CN1797675A (en) | 2006-07-05 |
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Granted publication date: 20090715 Termination date: 20111227 |