JPS6333257B2 - - Google Patents
Info
- Publication number
- JPS6333257B2 JPS6333257B2 JP53141333A JP14133378A JPS6333257B2 JP S6333257 B2 JPS6333257 B2 JP S6333257B2 JP 53141333 A JP53141333 A JP 53141333A JP 14133378 A JP14133378 A JP 14133378A JP S6333257 B2 JPS6333257 B2 JP S6333257B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical
- iron
- aluminum
- magnetron
- cylindrical yoke
- 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
Links
Landscapes
- Microwave Tubes (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Description
【発明の詳細な説明】
本発明は、電子レンジ等に用いられるマグネト
ロンに関し、陽極筒体または同筒体を囲繞する筒
状継鉄と放熱板との熱的結合度を良好ならしめた
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetron used in a microwave oven, etc., which improves the degree of thermal coupling between an anode cylinder or a cylindrical yoke surrounding the cylinder and a heat sink. be.
電子レンジ等に用いられるマグネトロンにおい
ては、その陽極筒体の外周面に多数の放熱板を多
段にとりつけ、この放熱板の板間に空冷用気流を
流通させることが行なわれている。また、磁石内
蔵型のマグネトロンにおいては、第１図に示すよ
うに陽極筒体１を囲繞する筒状継鉄２の外周面に
多数の放熱板３を多段にとりつけている。すなわ
ち、陰極４を同軸的に囲繞する陽極筒体１は、そ
の一方の開口端縁および他方の開口端縁に第１お
よび第２の非磁性金属板５，６をそれぞれ付設し
てなり、第１の非磁性金属板５によつて支持され
た第１の磁極片７は、これに積み重ねられた円柱
状の永久磁石８の一方の磁極Ｓと磁気的に結合し
ている。また、第２の非磁性金属板６によつて支
持された第２の磁極片９は、これに重ねられた円
筒状の永久磁石１０の一方の磁極Ｎと磁気的に結
合し、永久磁石８の他方の磁極Ｎは第１の平板状
継鉄１１、筒状継鉄２および第２の平板状継鉄１
２を介して永久磁石１０の他方の磁極Ｓに磁気的
に結合している。 In magnetrons used in microwave ovens and the like, a large number of heat radiating plates are attached in multiple stages to the outer circumferential surface of the anode cylindrical body, and a cooling air flow is caused to flow between the heat radiating plates. Further, in a magnetron with a built-in magnet, a large number of heat sinks 3 are attached in multiple stages to the outer peripheral surface of a cylindrical yoke 2 surrounding an anode cylinder 1, as shown in FIG. That is, the anode cylinder 1 that coaxially surrounds the cathode 4 has first and second non-magnetic metal plates 5 and 6 attached to one opening edge and the other opening edge, respectively. A first magnetic pole piece 7 supported by one non-magnetic metal plate 5 is magnetically coupled to one magnetic pole S of a cylindrical permanent magnet 8 stacked thereon. Further, the second magnetic pole piece 9 supported by the second non-magnetic metal plate 6 is magnetically coupled to one magnetic pole N of the cylindrical permanent magnet 10 stacked thereon, and the permanent magnet 8 The other magnetic pole N is the first flat yoke 11, the cylindrical yoke 2, and the second flat yoke 1.
It is magnetically coupled to the other magnetic pole S of the permanent magnet 10 via 2.
筒状継鉄２は陽極筒体１の外周面にろう付けさ
れており、筒状継鉄２の外周面に多段にとりつけ
られたアルミニウム製の多数の放熱板３は、第２
図に示すように筒状部３′に筒状継鉄２を圧入し
ている。なお、１３は電磁波放出用アンテナ、１
４は陰極端子導出用ステムを示す。 The cylindrical yoke 2 is brazed to the outer peripheral surface of the anode cylindrical body 1, and a large number of aluminum heat sinks 3 attached in multiple stages to the outer periphery of the cylindrical yoke 2 are
As shown in the figure, a cylindrical yoke 2 is press-fitted into the cylindrical portion 3'. In addition, 13 is an antenna for electromagnetic wave emission, 1
4 indicates a stem for leading out a cathode terminal.
このように構成された磁石内蔵型マグネトロン
においては、筒状継鉄２の外周面に多段にとりつ
けられた多数の放熱板３の板間に、図外の送風機
から送出された空冷用気流を流通させることによ
り、動作時マグネトロンの温度上昇を抑制できる
のであるが、鉄または鉄合金からなる筒状継鉄２
とアルミニウムからなる放熱板３との熱膨脹係数
差によつて、温度上昇した放熱板３と、同じく温
度上昇した筒状継鉄２との間に小空隙を生じ、両
者間の熱的結合度に低下をきたすという問題点が
あつた。 In the magnetron with a built-in magnet constructed in this way, air cooling air flow sent out from a blower (not shown) is distributed between the many heat sinks 3 attached to the outer peripheral surface of the cylindrical yoke 2 in multiple stages. By doing so, it is possible to suppress the temperature rise of the magnetron during operation.
Due to the difference in thermal expansion coefficient between the heat sink plate 3 made of aluminum and aluminum, a small gap is created between the heat sink plate 3 whose temperature has increased and the cylindrical yoke 2 whose temperature has also increased, and the degree of thermal coupling between the two is reduced. There was a problem that it caused a decline.
また、銅からなる陽極筒体の外周面にアルミニ
ウムからなる放熱板を嵌合させた形式のマグネト
ロンにおいても、程度の差こそあれ前述と同様の
問題点があつた。 Furthermore, magnetrons in which a heat sink made of aluminum is fitted onto the outer peripheral surface of an anode cylindrical body made of copper also have the same problems as described above, albeit to a lesser extent.
本発明は、かかる従来の問題点に鑑みてなされ
たもので、本発明のマグネトロンを以下図面に示
した実施例とともに説明する。 The present invention has been made in view of these conventional problems, and the magnetron of the present invention will be explained below along with embodiments shown in the drawings.
第３図に示すように、鉄または鉄合金からなる
筒状継鉄２の外周面に圧入により嵌着された放熱
板１５は、鉄または鉄合金を芯材１６としてその
表裏両面にアルミニウムまたはアルミニウム合金
の被覆材１７，１８を備えた三層構造の複合板か
らなつている。 As shown in FIG. 3, the heat dissipation plate 15 is press-fitted onto the outer peripheral surface of the cylindrical yoke 2 made of iron or iron alloy, and has a core material 16 of iron or iron alloy, and its front and back surfaces are made of aluminum or aluminum. It consists of a three-layer composite plate with alloy coatings 17 and 18.
このように構成されたマグネトロンにおいて
は、放熱板１５の熱伝導率を比較的高い値に保ち
ながら、その熱膨脹係数を筒状継鉄２の熱膨脹係
数に近づけることができ、マグネトロン動作時に
放熱板１５と筒状継鉄２との嵌合部に緩みを生じ
る危惧が解消され、良好な空冷効果を得ることが
てきる。 In the magnetron configured in this manner, the thermal conductivity of the heat sink 15 can be kept at a relatively high value while its coefficient of thermal expansion can be made close to that of the cylindrical yoke 2. This eliminates the fear of loosening of the fitting portion between the cylindrical yoke 2 and the cylindrical yoke 2, and a good air cooling effect can be obtained.
また、かかる三層構造の複合板からなる放熱板
は、アルミニウム単体の放熱板に比して低い熱膨
脹率、つまり、銅の熱膨脹率に近い熱膨脹率を有
するので、この放熱板を銅または銅合金からなる
陽極筒体の外周面にとりつけても、前述における
と同様の効果を得ることができる。 In addition, a heat sink made of such a three-layer composite plate has a coefficient of thermal expansion lower than that of a heat sink made of aluminum alone, that is, a coefficient of thermal expansion close to that of copper. Even if it is attached to the outer circumferential surface of an anode cylinder consisting of a cylindrical anode, the same effect as described above can be obtained.
第１図は磁石内蔵型マグネトロンの一部破断側
面図、第２図は同マグネトロンの筒状継鉄と放熱
板との結合関係を示す斜視図、第３図は本発明を
実施したマグネトロンの要部の側断面図である。
１……陽極筒体、２……筒状継鉄、１５……放
熱板、１６……芯材、１７，１８……被覆材。
Fig. 1 is a partially cutaway side view of a magnetron with a built-in magnet, Fig. 2 is a perspective view showing the coupling relationship between the cylindrical yoke and the heat sink of the magnetron, and Fig. 3 is an outline of the magnetron embodying the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Anode cylinder body, 2... Tubular yoke, 15... Heat sink, 16... Core material, 17, 18... Covering material.
Claims (1)
する鉄または鉄合金からなる筒状継鉄を筒状部に
密に嵌入する放熱板を、鉄または鉄合金を芯材と
しアルミニウムまたはアルミニウム合金を表裏の
被覆材とする三層構造の複合板で形成したことを
特徴とするマグネトロン。1. A heat dissipation plate in which an anode cylinder made of copper or a cylindrical yoke made of iron or iron alloy that surrounds the anode cylinder is tightly fitted into the cylindrical part, is made of iron or iron alloy as the core material and aluminum or aluminum alloy as the core material. A magnetron characterized by being formed from a three-layer composite plate with a front and back covering material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14133378A JPS5568046A (en) | 1978-11-15 | 1978-11-15 | Magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14133378A JPS5568046A (en) | 1978-11-15 | 1978-11-15 | Magnetron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5568046A JPS5568046A (en) | 1980-05-22 |
| JPS6333257B2 true JPS6333257B2 (en) | 1988-07-05 |
Family
ID=15289502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14133378A Granted JPS5568046A (en) | 1978-11-15 | 1978-11-15 | Magnetron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5568046A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4847255U (en) * | 1971-10-06 | 1973-06-21 | ||
| JPS5553072Y2 (en) * | 1974-08-19 | 1980-12-09 | ||
| JPS5136068A (en) * | 1974-09-24 | 1976-03-26 | Hitachi Ltd | MAGUNETORON |
-
1978
- 1978-11-15 JP JP14133378A patent/JPS5568046A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5568046A (en) | 1980-05-22 |
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