JP3139784B2 - Magnetron - Google Patents
MagnetronInfo
- Publication number
- JP3139784B2 JP3139784B2 JP03227333A JP22733391A JP3139784B2 JP 3139784 B2 JP3139784 B2 JP 3139784B2 JP 03227333 A JP03227333 A JP 03227333A JP 22733391 A JP22733391 A JP 22733391A JP 3139784 B2 JP3139784 B2 JP 3139784B2
- Authority
- JP
- Japan
- Prior art keywords
- electromagnet coil
- permanent magnet
- magnetron
- yoke
- electromagnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Microwave Tubes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明はマグネトロンに係り、
特にその磁石付近の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetron,
In particular, it relates to improvement near the magnet.
【０００２】[0002]
【従来の技術】従来、電子レンジ用マグネトロンは、図
４に示すように構成され、符号１は陽極円筒、２はベイ
ン、３はフィラメントカソ−ド、４，５はポ−ルピ−
ス、６，７は出力部８と入力部９を構成する筒状金属容
器、１０，１１はリング状フェライト製永久磁石、１
２，１３は永久磁石の外周に同軸的に配設されリング状
電磁石コイルである。これら磁石１０，１１，１２，１
３に強磁性体製ヨ−ク１４，１５が磁気的に接続されて
いるが、従来は各磁石１０，１１，１２，１３がヨ−ク
１４，１５に密着していた。尚、電磁石コイル１２，１
３は巻線同士が絶縁ワニスのような接着剤で固められて
いる。又、図中の符号１６，１７は陽極円筒１の側面に
設けられた水冷パイプ、１８は冷媒通路、１９は入力部
９を覆うシ−ルドボックス、２０はアンテナリ−ドであ
る。2. Description of the Related Art Conventionally, a magnetron for a microwave oven is constructed as shown in FIG. 4, wherein reference numeral 1 denotes an anode cylinder, 2 denotes a vane, 3 denotes a filament cathode, and 4,5 denote polepis.
, 6 and 7 are cylindrical metal containers constituting the output section 8 and the input section 9, 10 and 11 are ring-shaped ferrite permanent magnets, 1
Reference numerals 2 and 13 denote ring-shaped electromagnet coils disposed coaxially on the outer periphery of the permanent magnet. These magnets 10, 11, 12, 1
Yoke 14 and 15 made of ferromagnetic material are magnetically connected to 3. Conventionally, magnets 10, 11, 12 and 13 are in close contact with yokes 14 and 15. The electromagnet coils 12, 1
In 3, the windings are fixed with an adhesive such as an insulating varnish. Reference numerals 16 and 17 in the figure denote water-cooled pipes provided on the side surfaces of the anode cylinder 1, 18 denotes a refrigerant passage, 19 denotes a shield box for covering the input section 9, and 20 denotes an antenna lead.
【０００３】[0003]
【発明が解決しようとする課題】ところが上記従来の構
造では、電磁石コイル１２，１３は巻線同士が絶縁ワニ
スのような接着剤で固められていると共にヨ−ク１４，
１５に密着され、且つ永久磁石１０，１１にも密着され
ている。電磁石コイル１２，１３が発熱源となるため、
電磁石コイル１２，１３および永久磁石１０，１１の温
度が上昇し易い。又、電磁石コイル１２，１３とヨ−ク
１４，１５との間の電気的絶縁が、コイルワイヤのエナ
メル被覆のみで保たれる構造であり、電気的絶縁が破壊
され易い。この発明は、以上のような不都合を解決する
ものであり、電磁石コイルおよび永久磁石の過熱を抑制
し、電磁石コイルとヨ−クとの電気的絶縁を十分保つこ
とが出来るマグネトロンを提供することを目的とする。However, in the above-mentioned conventional structure, the windings of the electromagnet coils 12 and 13 are fixed with an adhesive such as an insulating varnish and the yokes 14 and 13.
15 and the permanent magnets 10 and 11. Since the electromagnet coils 12 and 13 are heat sources,
The temperatures of the electromagnet coils 12, 13 and the permanent magnets 10, 11 tend to rise. Further, the electric insulation between the electromagnet coils 12, 13 and the yokes 14, 15 is a structure that is maintained only by the enamel coating of the coil wires, and the electric insulation is easily broken. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described disadvantages, and has as its object to provide a magnetron that can suppress overheating of an electromagnet coil and a permanent magnet and sufficiently maintain electrical insulation between the electromagnet coil and a yoke. Aim.
【０００４】[0004]
【課題を解決するための手段】この発明は、電磁石コイ
ルが単独又は永久磁石と共に絶縁性および断熱性のある
糸で巻かれ、この糸が少なくとも電磁石コイルとヨ−ク
との間に介在されて両者間に空隙が形成されてなるマグ
ネトロンである。According to the present invention, an electromagnet coil is wound alone or in combination with a permanent magnet with an insulating and heat insulating yarn, and this yarn is interposed at least between the electromagnet coil and the yoke. This is a magnetron in which a gap is formed between the two.
【０００５】[0005]
【作用】この発明によれば、電磁石コイル、又は電磁石
コイルと永久磁石とを一緒に巻いた糸の部分で電磁石コ
イルとヨ−クとの間に空隙が出来るので、断熱又は放熱
作用があり、且つ電磁石コイルとヨ−ク又は電磁石コイ
ルと永久磁石との間の電気的絶縁が一層確保される。According to the present invention, a gap is formed between the electromagnet coil and the yoke in the electromagnet coil, or in a portion of the yarn in which the electromagnet coil and the permanent magnet are wound together, thereby providing heat insulation or heat radiation. Further, electrical insulation between the electromagnet coil and the yoke or between the electromagnet coil and the permanent magnet is further ensured.
【０００６】[0006]
【実施例】以下、図面を参照して、この発明の一実施例
を詳細に説明する。この発明によるマグネトロンは、図
１および図２に示すように構成され、従来例（図４）と
同一箇所は同一符号を付すことにする。An embodiment of the present invention will be described below in detail with reference to the drawings. The magnetron according to the present invention is configured as shown in FIGS. 1 and 2, and the same parts as those in the conventional example (FIG. 4) are denoted by the same reference numerals.
【０００７】即ち、陽極円筒１の内側には、複数のベイ
ン２が放射状に配設されて空胴共振器が構成されてい
る。複数のベイン２の遊端に囲まれた電子作用空間部に
は、螺旋状フィラメントカソ−ド３が陽極円筒１の軸心
に沿って配設され、陽極円筒１の両端には、それぞれ略
漏斗状のポ−ルピ−ス４，５が固着され、各ポ−ルピ−
ス４，５にはそれぞれ出力部８と入力部９とを構成する
筒状の金属容器６，７が固着されている。これら金属容
器６，７を同軸的に取巻いてリング状フェライト製永久
磁石１０，１１が同軸的に配設され、この永久磁石１
０，１１の外周にリング状電磁石コイル１２，１３が同
軸的に配設され、これら磁石１０，１１，１２，１３に
強磁性体製ヨ−ク１４，１５が磁気的に接続されてい
る。この場合、図２からも明らかなように、電磁石コイ
ル１３は電気的絶縁性および断熱性のある例えば麻紐の
ような糸２１で数箇所巻かれ、この糸２１が電磁石コイ
ル１３とヨ−ク１５との間に介在されて両者間に空隙２
２が形成されている。図示しないが、もう一方の永久磁
石１０、電磁石コイル１２およびヨ−ク１４の関係も同
様である。又、糸２１は電磁石コイル１２，１３と永久
磁石１０，１１との間にも介在されて両者間に空隙が形
成されている。尚、糸２１で巻くのは、螺旋状に巻いて
も良い。That is, a plurality of vanes 2 are radially arranged inside the anode cylinder 1 to form a cavity resonator. A helical filament cathode 3 is disposed along the axis of the anode cylinder 1 in an electron working space surrounded by the free ends of the plurality of vanes 2. -Shaped pole pieces 4 and 5 are fixed to each other.
Tubular metal containers 6 and 7 forming an output unit 8 and an input unit 9 are fixed to the switches 4 and 5, respectively. Ring-shaped ferrite permanent magnets 10 and 11 are coaxially disposed around the metal containers 6 and 7 coaxially.
Ring-shaped electromagnet coils 12 and 13 are coaxially arranged on the outer periphery of 0 and 11, and ferromagnetic yokes 14 and 15 are magnetically connected to these magnets 10, 11, 12 and 13. In this case, as is clear from FIG. 2, the electromagnet coil 13 is wound at several places with an electrically insulating and heat insulating thread 21 such as a hemp string. And a gap 2 between them.
2 are formed. Although not shown, the relationship between the other permanent magnet 10, electromagnet coil 12, and yoke 14 is the same. The yarn 21 is also interposed between the electromagnet coils 12, 13 and the permanent magnets 10, 11, so that a gap is formed between them. The winding with the thread 21 may be spirally wound.
【０００８】更に、ベイン２の１つからアンテナリ−ド
２０が導出され、出力部８内を伸びている。又、入力部
９を覆うようにシ−ルドボックス１９が設けられ、ヨ−
ク１５に接している。 （変形例）Further, an antenna lead 20 is derived from one of the vanes 2 and extends inside the output section 8. Further, a shield box 19 is provided so as to cover the input unit 9, and the shield box 19 is provided.
15 (Modification)
【０００９】上記実施例では、電磁石コイル１２，１３
のみが糸２１で巻かれていたが、図３に示すように、永
久磁石１１と電磁石コイル１３とを交互に複数箇所にて
一緒に糸２１で巻いても良い。この場合、永久磁石１１
と電磁石コイル１３との間に空隙２３が形成されるだけ
でなく、永久磁石１１とヨ−ク１５との間にも空隙が形
成され、若干磁気抵抗が増えるが、過熱防止効果と電気
的絶縁効果が大きい。図示しないが、もう一方の永久磁
石１０、電磁石コイル１２およびヨ−ク１４の関係も同
様である。In the above embodiment, the electromagnet coils 12, 13
Although only the yarn 21 is wound by the thread 21, as shown in FIG. 3, the permanent magnet 11 and the electromagnet coil 13 may be alternately wound by the thread 21 at a plurality of locations. In this case, the permanent magnet 11
A gap 23 is formed not only between the permanent magnet 11 and the yoke 15 but also slightly increases the magnetic reluctance. Great effect. Although not shown, the relationship between the other permanent magnet 10, electromagnet coil 12, and yoke 14 is the same.
【００１０】[0010]
【発明の効果】この発明によれば、電磁石コイルが単独
又は永久磁石と共に絶縁性および断熱性のある糸で巻か
れているので、少なくとも電磁石コイルとヨ−クとの間
にほぼ糸の太さ分に相当する寸法の空隙が形成される。
この空隙により電磁石コイルからの放熱が促進され、電
磁石コイルおよび永久磁石の過熱が抑制される。又、電
磁石コイルとヨ−クとの間の電気的絶縁性も増す。更
に、電磁石コイルがほぐれることもない。According to the present invention, since the electromagnet coil is wound alone or together with the permanent magnet with an insulating and heat insulating yarn, the thickness of the yarn is substantially at least between the electromagnet coil and the yoke. A void having a size corresponding to a minute is formed.
This gap promotes heat radiation from the electromagnet coil, and suppresses overheating of the electromagnet coil and the permanent magnet. Also, the electrical insulation between the electromagnet coil and the yoke is increased. Further, the electromagnet coil does not come loose.
【図１】この発明の一実施例に係るマグネトロンを示す
半縦断面図。FIG. 1 is a half longitudinal sectional view showing a magnetron according to one embodiment of the present invention.
【図２】この発明のマグネトロンで使用する永久磁石お
よび電磁石コイルを示す半縦断面図。FIG. 2 is a semi-longitudinal sectional view showing a permanent magnet and an electromagnet coil used in the magnetron of the present invention.
【図３】この発明の変形例を示す斜視図。FIG. 3 is a perspective view showing a modification of the present invention.
【図４】従来のマグネトロンを示す半縦断面図。FIG. 4 is a half longitudinal sectional view showing a conventional magnetron.
１…陽極円筒、２…ベイン、３…フィラメントカソ−
ド、４，５…ポ−ルピ−ス、６，７…金属容器、８…出
力部、９…入力部、１０，１１…永久磁石、１２，１３
…電磁石コイル、１４，１５…ヨ−ク、２１…糸、２
２，２３…空隙。1. Anode cylinder, 2. Vane, 3. Filament cathode
, 4,5 ... pole pieces, 6,7 ... metal container, 8 ... output unit, 9 ... input unit, 10,11 ... permanent magnet, 12,13
... Electromagnetic coils, 14, 15 ... Yoke, 21 ... Thread, 2
2,23 ... voids.
Claims (1)
ピ−ス上にリング状の永久磁石が配設され、この永久磁
石の外周にリング状電磁石コイルが同軸的に配設され、
これら永久磁石および電磁石コイルに強磁性体製ヨ−ク
が磁気的に接続されてなるマグネトロンにおいて、 上記電磁石コイルが単独又は上記永久磁石と共に絶縁性
および断熱性のある糸で巻かれ、この糸が少なくとも上
記電磁石コイルと上記ヨ−クとの間に介在されて両者間
に空隙が形成されてなることを特徴とするマグネトロ
ン。1. A ring-shaped permanent magnet is disposed on a pole piece fixed to an open end of an anode cylinder, and a ring-shaped electromagnet coil is coaxially disposed on the outer periphery of the permanent magnet.
In a magnetron in which a ferromagnetic yoke is magnetically connected to the permanent magnet and the electromagnet coil, the electromagnet coil is wound alone or together with the permanent magnet with an insulating and heat insulating yarn. A magnetron interposed at least between the electromagnet coil and the yoke to form a gap therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03227333A JP3139784B2 (en) | 1991-09-06 | 1991-09-06 | Magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03227333A JP3139784B2 (en) | 1991-09-06 | 1991-09-06 | Magnetron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0567435A JPH0567435A (en) | 1993-03-19 |
| JP3139784B2 true JP3139784B2 (en) | 2001-03-05 |
Family
ID=16859167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03227333A Expired - Fee Related JP3139784B2 (en) | 1991-09-06 | 1991-09-06 | Magnetron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3139784B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103848463B (en) * | 2014-02-28 | 2015-10-21 | 长沙威保特环保科技有限公司 | The treatment unit of low-temperature evaporation high-concentration sewage |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2310539B (en) * | 1996-02-21 | 2000-06-07 | Eev Ltd | An electromagnet |
| JP2006040576A (en) * | 2004-07-22 | 2006-02-09 | Matsushita Electric Ind Co Ltd | Magnetron |
| JP7240263B2 (en) * | 2019-06-12 | 2023-03-15 | 日清紡マイクロデバイス株式会社 | Electromagnet for magnetron |
-
1991
- 1991-09-06 JP JP03227333A patent/JP3139784B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103848463B (en) * | 2014-02-28 | 2015-10-21 | 长沙威保特环保科技有限公司 | The treatment unit of low-temperature evaporation high-concentration sewage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0567435A (en) | 1993-03-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |