JPH0140155Y2 - - Google Patents
Info
- Publication number
- JPH0140155Y2 JPH0140155Y2 JP1980149711U JP14971180U JPH0140155Y2 JP H0140155 Y2 JPH0140155 Y2 JP H0140155Y2 JP 1980149711 U JP1980149711 U JP 1980149711U JP 14971180 U JP14971180 U JP 14971180U JP H0140155 Y2 JPH0140155 Y2 JP H0140155Y2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum plate
- plate
- insulating material
- heat generating
- generating part
- 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
- 229910052782 aluminium Inorganic materials 0.000 claims description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 48
- 239000011810 insulating material Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 11
- 239000010445 mica Substances 0.000 description 5
- 229910052618 mica group Inorganic materials 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Surface Heating Bodies (AREA)
Description
【考案の詳細な説明】
〔考案の構成〕
（産業上の利用分野）
本考案は発熱部を包囲した包囲体の構造と使用
形態から生じる包囲体の変形に対し、発熱部と包
囲体との間に介在する絶縁材の破壊を防止した発
熱体に関する。[Detailed description of the invention] [Structure of the invention] (Industrial application field) The present invention solves the deformation of the surrounding body surrounding the heat generating part due to the structure and usage pattern of the surrounding body. The present invention relates to a heating element that prevents destruction of an insulating material interposed between the heating elements.
（従来の技術）
従来、発熱体たとえば湯沸し器などの熱源を形
成するバンド式スペースヒータは第４図および第
５図に示すようにマイカ板ａに主発熱線ｂと保温
用発熱線ｃとを交互に巻回した発熱部Ａとこの発
熱部Ａをマイカなどの絶縁材ｄ，ｄを介して内部
に収納する金属板製包囲体Ｂとからなつている。
そして被加熱容器と密着する包囲体Ｂの伝熱面側
をアルミニウム板ｅとし他面を鋼板ｆとしてこれ
らをアルミニウム板ｅのかしめ付けによつて一体
に形成してある。そうして、この発熱体を被加熱
容器に巻装してアルミニウム板ｅを被加熱容器に
密着させ、発熱線ｂ，ｃに通電して発熱させ、そ
の熱をアルミニウム板ｅを介して被加熱容器に伝
導させるものである。(Prior Art) Conventionally, a band-type space heater that forms a heat source for a heating element, such as a water heater, has a mica plate a with a main heating wire b and a heat-retaining heating wire c, as shown in FIGS. 4 and 5. It consists of a heat generating part A wound alternately and an envelope B made of a metal plate in which the heat generating part A is housed inside via insulating materials d, d such as mica.
The heat transfer surface side of the enclosure B that is in close contact with the container to be heated is an aluminum plate e, and the other side is a steel plate f, and these are integrally formed by caulking the aluminum plate e. Then, this heating element is wrapped around the container to be heated, the aluminum plate e is brought into close contact with the container to be heated, and the heating wires b and c are energized to generate heat, and the heat is transferred to the heated container through the aluminum plate e. conduction to the container.
（考案が解決しようとする課題）
上記従来の発熱体は包囲体Ｂが伝熱面側を熱膨
張率の大きいアルミニウム板ｅで構成し、他面を
熱膨張率の小さい鋼板ｆで構成しており、しかも
両者ｅ，ｆがかしめ付けによつて一体的に構成さ
れているので、加熱時には両者ｅ，ｆに熱膨張差
を生じ、その歪みが熱膨張が大きく、かつ軟質で
あるアルミニウム板ｅに集中して凹凸などの熱変
形を生じる。さらに、これに加えて、この発熱体
は使用時において伝熱面側をなすアルミニウム板
ｅが発熱部Ａへの通電により急熱を受け、また容
器への注水による急冷を受けるとアルミニウム板
ｅの膨張、収縮のくり返えしによりその熱変形を
助長する。この結果、アルミニウム板ｅと容器と
の間に隙間が生じて密着性を損なわせ、容器や容
器内の液体への熱伝導を低下させてアルミニウム
板ｅ自身の局部的加熱が生じアルミニウム板ｅは
鋼板ｆに阻止されて均一な膨張、収縮ができず、
凹凸状に部分的に膨張して内側に突出する。その
結果、絶縁材のマイカ板ｄを押しつぶして、破壊
にいたらしめ発熱線ｂ，ｃ間を短絡させたり、あ
るいは絶縁抵抗を低下させる欠点を有していた。(Problem to be solved by the invention) In the conventional heating element described above, the envelope B has a heat transfer surface made of an aluminum plate e with a large coefficient of thermal expansion, and the other side made of a steel plate f with a small coefficient of thermal expansion. In addition, since both e and f are integrally constructed by caulking, a difference in thermal expansion occurs between both e and f when heated, and this distortion causes the aluminum plate e, which has a large thermal expansion and is soft. Thermal deformation, such as unevenness, is concentrated on the surface. In addition, when this heating element is in use, when the aluminum plate e forming the heat transfer surface side is rapidly heated by energizing the heat generating part A and rapidly cooled by pouring water into the container, the aluminum plate e Repeated expansion and contraction promotes its thermal deformation. As a result, a gap is created between the aluminum plate e and the container, impairing the adhesion and reducing heat conduction to the container and the liquid in the container, causing local heating of the aluminum plate e itself. It is blocked by the steel plate f and cannot expand and contract uniformly,
It partially expands in an uneven shape and protrudes inward. As a result, the mica plate d, which is an insulating material, may be crushed and destroyed, resulting in a short circuit between the heating wires b and c, or a reduction in insulation resistance.
そこで、本考案の課題は上述の発熱体におけ
る、包囲体の構造と使用形態に起因するアルミニ
ウム板の熱変形による押圧力によつて絶縁材が破
壊されないようにすることである。 Therefore, an object of the present invention is to prevent the insulating material from being destroyed by the pressing force caused by thermal deformation of the aluminum plate caused by the structure and usage of the enclosure in the above-mentioned heating element.
（課題を解決するための手段）
本考案は片面がアルミニウム板、他面が鋼板で
一体的に構成されて発熱部を包囲した包囲体のア
ルミニウム板と発熱部との間および鋼板と発熱部
との間にそれぞれ絶縁材を介在させてなり、アル
ミニウム板を伝熱面側にして被加熱体に密接させ
て使用させる発熱体において、アルミニウム板と
絶縁材との間に保護板を配設してアルミニウム板
の熱変形による押圧力から絶縁材を保護するもの
である。
(Means for Solving the Problems) The present invention provides an enclosure that is integrally composed of an aluminum plate on one side and a steel plate on the other side and surrounds the heat generating part, and between the aluminum plate and the heat generating part, and between the steel plate and the heat generating part. In a heating element that is used with an aluminum plate placed on the heat transfer surface side in close contact with a heated object, a protective plate is disposed between the aluminum plate and the insulating material. This protects the insulating material from the pressing force caused by thermal deformation of the aluminum plate.
（作用）
包囲体の片面がアルミニウム板、他面が鋼板で
一体的に構成されているので、この包囲体が加熱
されると熱膨張率が大きくかつ軟質なアルミニウ
ム板に歪みが集中して熱変形し、しかも、このア
ルミニウム板が急熱急冷による局部的な膨張収縮
を繰返すことによつて上述の熱変形を助長する。
この結果、アルミニウム板が部分的に内側に突出
する。しかし、本考案の発熱体はアルミニウム板
と絶縁材との間に保護板を配設してアルミニウム
板の熱変形による押圧力から絶縁材を保護したの
で、絶縁材が破壊されることがほとんどなくなつ
た。(Function) Since the enclosure is integrally constructed with an aluminum plate on one side and a steel plate on the other side, when the enclosure is heated, distortion concentrates on the soft aluminum plate, which has a large coefficient of thermal expansion, and heat is generated. Moreover, the aluminum plate repeats local expansion and contraction due to rapid heating and cooling, thereby promoting the above-mentioned thermal deformation.
As a result, the aluminum plate partially protrudes inward. However, in the heating element of the present invention, a protective plate is placed between the aluminum plate and the insulating material to protect the insulating material from the pressing force caused by thermal deformation of the aluminum plate, so the insulating material is almost never destroyed. Summer.
（実施例）
本考案の詳細を図示の実施例によつて説明す
る。図は本考案を適用してなるバンド式スペース
ヒータで、たとえば湯沸し器などの被加熱体（図
示しない。）の外周に巻付けて密着して使用され
るもので、第１図にその全体の上面図を示す。図
中、１はスペースヒータを示し、後述する構成を
有する還状の包囲体７の両端に、その１部９，９
（詳細は後述する。）を突出させて緊締部を形成
し、かつ、両端部に所要の端子を設けてある。(Example) The details of the present invention will be explained by referring to the illustrated example. The figure shows a band-type space heater to which the present invention is applied, which is used by being wrapped closely around the outer circumference of an object to be heated (not shown), such as a water heater. A top view is shown. In the figure, reference numeral 1 indicates a space heater, and parts 9, 9 are attached to both ends of a ring-shaped enclosure 7 having a configuration to be described later.
(Details will be described later) are made to protrude to form a tightening part, and required terminals are provided at both ends.
しかして、上記包囲体７の内部を第２図の一部
を切欠した側面図および第３図の断面図に示す。
これらの図に示すように、包囲体７は断面が薄い
ケース状をなすバンド体で、その内部に偏平な発
熱部５を収容し、かつこの発熱部５と包囲体７と
の間には絶縁マイカなどの絶縁材６，６を介在さ
せて電気絶縁を行なつている。 The interior of the enclosure 7 is shown in a partially cutaway side view in FIG. 2 and in a sectional view in FIG. 3.
As shown in these figures, the enclosure 7 is a band body with a thin case-like cross section, and houses a flat heat generating part 5 therein, and there is an insulation between the heat generating part 5 and the enclosure 7 . Electrical insulation is provided by intervening insulating materials 6, 6 such as mica.
上記包囲体７はバンド体の内面側が被加熱体
（図示しない。）に密接する伝熱面をなし、熱伝導
性に優れたアルミニウム板（熱伝導率ｋ＝0.57、
熱膨張率α＝23.5×10-6）８で構成され、かつ外
面側は抗張力に優れた鋼板（熱伝導率ｋ＝0.17、
熱膨張率α＝12.6×10-6）９で構成され、両者が
アルミニウム板８のかしめ付けによつて一体的に
結合され、かつ鋼板９の両端が包囲体７外に突出
させて上述した第１図の緊締部を形成してある。 The enclosure 7 has an aluminum plate with excellent thermal conductivity (thermal conductivity k=0.57,
Thermal expansion coefficient α = 23.5 × 10 -6 ) 8, and the outer surface is made of a steel plate with excellent tensile strength (thermal conductivity k = 0.17,
The thermal expansion coefficient α=12.6× 10 -6 The tightening portion shown in FIG. 1 is formed.
上記発熱部５はマイカ板からなる絶縁性基板部
２に交互に離間して巻回された主発熱線３および
保温用発熱線４とからなる偏平体で、偏平面を並
行にして包囲体内に収容されている。そうして、
この発熱部５と包囲体７のアルミニウム板８およ
び鋼板９との間にそれぞれ上述のとおり絶縁材
６，６を介在させてある。 The heating section 5 is a flat body consisting of a main heating wire 3 and a heat-retaining heating wire 4 which are wound around an insulating substrate section 2 made of a mica plate at a distance from each other. It is accommodated. Then,
Insulating materials 6, 6 are interposed between the heat generating portion 5 and the aluminum plate 8 and steel plate 9 of the enclosure 7 , respectively, as described above.
そうして、本考案の特徴は包囲体７の両面のう
ち少なくともアルミニウム板８と絶縁材６との間
に保護板１０を配設して絶縁材６のほぼ全面を覆
つて、絶縁材６を機械的に保護していることであ
る。このような保護板１０の例としてはたとえば
アルミニウムめつき鋼板または亜鉛めつき鋼板な
どは薄くても充分な剛性を有し、さらに付随的な
利点として耐酸化性に優れ、かつ熱伝導性も比較
的良好であるなどの特性を有し好ましいものであ
る。 The feature of the present invention is that a protection plate 10 is disposed between at least the aluminum plate 8 and the insulating material 6 on both sides of the enclosure 7 to cover almost the entire surface of the insulating material 6. It is mechanically protected. An example of such a protective plate 10 is an aluminum-plated steel plate or a galvanized steel plate, which has sufficient rigidity even if it is thin, and has additional advantages of excellent oxidation resistance and thermal conductivity. It is preferable because it has characteristics such as good accuracy.
つぎに、作用について説明する。本実施例にお
ける包囲体７は上述したとおり、伝熱面側が伝熱
性が良好であるがその反面熱膨張率が大きくかつ
軟質であるアルミニウム板８で構成されかつ外面
側が熱膨張率が小さくかつ剛性の強い鋼板９で構
成され、しかも両者８，９が一体的に結合されて
いるので、この包囲体７の温度が上昇すると、両
者８，９に熱膨張差を生じ、その歪みがアルミニ
ウム板８に熱中してこれを変形させる。加えて、
使用時において通電により発熱部５の熱がアルミ
ニウム板８に伝導して急熱を受け、また被被加体
への注水などにより急冷を受けると、アルミニウ
ム板８が膨張、収縮をし、その繰返しにより、容
器との間に局部的な隙間を生じ、このため隙間部
分は伝熱が悪いため過度に昇温して隙間のない部
分との間に温度差を生じ、しかも、上述のとお
り、アルミニウム板８が鋼板９と一体的に結合さ
れているので均一な膨張収縮ができず、このため
上述した熱膨張率差に起因する熱変形が益々助長
され、絶縁材６に向つて局部的に突出する。しか
し、本考案においては上述のとおり、保護板１０
を設けたので、アルミニウム板８の局部的突出が
保護板１０の剛性によつて阻止され、絶縁材６に
局部的押圧力を印加することがなく、絶縁材６の
破壊を防止できる。したがつて、発熱線３，４の
短絡や絶縁抵抗の低下を生じることがない。しか
も、保護板１０は絶縁材６の全面を覆つているの
で、緩衝力が優れ、かつアルミニウム板８のどの
部分に熱変形を生じても充分に保護できる。ま
た、保護板を金属で構成したので、保護板の存在
しないものと比較してアルミニウム板に伝わる熱
が均一となる付随的な利点もある。 Next, the effect will be explained. As described above, the enclosure 7 in this embodiment is composed of an aluminum plate 8 whose heat transfer surface side has good heat conductivity but, on the other hand, has a large coefficient of thermal expansion and is soft, and the outer surface side has a small coefficient of thermal expansion and is rigid. It is made of a strong steel plate 9, and since both 8 and 9 are integrally connected, when the temperature of this enclosure 7 rises, a difference in thermal expansion occurs between the two 8 and 9, and this distortion causes the aluminum plate 8 to I am passionate about this and transform it. In addition,
During use, when electricity is applied, the heat of the heat generating part 5 is conducted to the aluminum plate 8 and it receives rapid heat, and when the object to be applied is rapidly cooled by pouring water, the aluminum plate 8 expands and contracts, and this cycle repeats. As a result, a local gap is created between the aluminum and the container, and as a result, the gap area has poor heat transfer, so the temperature rises excessively and creates a temperature difference between the gap area and the area with no gap. Since the plate 8 is integrally connected to the steel plate 9, uniform expansion and contraction is not possible, and therefore thermal deformation due to the above-mentioned difference in thermal expansion coefficient is further promoted, causing the plate to locally protrude toward the insulating material 6. do. However, in the present invention, as described above, the protection plate 10
Since this is provided, local protrusion of the aluminum plate 8 is prevented by the rigidity of the protective plate 10, and no local pressing force is applied to the insulating material 6, so that destruction of the insulating material 6 can be prevented. Therefore, short-circuiting of the heating wires 3 and 4 and reduction in insulation resistance will not occur. Moreover, since the protective plate 10 covers the entire surface of the insulating material 6, it has excellent buffering force and can sufficiently protect any part of the aluminum plate 8 from thermal deformation. Furthermore, since the protective plate is made of metal, there is an additional advantage that the heat transmitted to the aluminum plate is more uniform compared to a case without a protective plate.
このように、本考案の発熱体は発熱部と、片面
がアルミニウム板で、他面が鋼板で一体的に構成
され上記発熱部を包囲した包囲体と、発熱部とア
ルミニウム板との間および発熱部と鋼板との間に
それぞれ介在した絶縁材とを有し、アルミニウム
板を伝熱面側として被加熱体に密接して使用され
る発熱体において、アルミニウム板と絶縁材との
間にアルミニウム板の熱変形による押圧力から絶
縁材を保護する保護板を配設したので、包囲体が
伝熱面側を熱膨張率が大きくかつ軟質のアルミニ
ウム板で構成し、他面を熱膨張率が小さくかつ剛
性の大きい鋼板で構成され、この構成と上述の使
用形態によつてアルミニウム板に熱変形を生じて
も、この熱変形による押圧力を保護板で阻止する
ので、絶縁材が破壊されることがない。したがつ
て発熱線の短絡を生じさせることがなく、また絶
縁抵抗の低下を招くことのないすぐれた利点を有
する。
In this way, the heat generating element of the present invention includes a heat generating part, an enclosure that is integrally formed with an aluminum plate on one side and a steel plate on the other side and surrounds the heat generating part, and a space between the heat generating part and the aluminum plate and a heat generating body. In a heating element that has an insulating material interposed between the aluminum plate and the steel plate, and is used in close contact with a heated object with the aluminum plate as the heat transfer surface side, the aluminum plate is interposed between the aluminum plate and the insulating material. A protective plate is installed to protect the insulating material from the pressing force caused by thermal deformation of the enclosure, so the heat transfer surface side of the enclosure is made of a soft aluminum plate with a high coefficient of thermal expansion, and the other side is made of a soft aluminum plate with a low coefficient of thermal expansion. Moreover, it is constructed of a steel plate with high rigidity, and even if thermal deformation occurs in the aluminum plate due to this configuration and the above-mentioned usage pattern, the pressing force due to this thermal deformation is blocked by the protective plate, so the insulation material will not be destroyed. There is no. Therefore, it has the excellent advantage of not causing short-circuiting of heating wires and of causing no reduction in insulation resistance.
図は本考案の実施例を示し、第１図は上面図、
第２図は一部を切欠して内部を示す側面図、第３
図は第２図部分の拡大断面図であり、第４図は従
来例を示す一部切欠側面図、第５図は同じく第３
図部分の断面図である。
５……発熱部、６……絶縁材、７……包囲体、
８……アルミニウム板、９……鋼板、１０……保
護板。
The figures show an embodiment of the invention, with Figure 1 being a top view;
Figure 2 is a partially cutaway side view showing the inside, Figure 3 is a side view showing the inside.
The figure is an enlarged sectional view of the part shown in Fig. 2, Fig. 4 is a partially cutaway side view showing the conventional example, and Fig. 5 is an enlarged sectional view of the part shown in Fig. 3.
It is a sectional view of the figure part. 5 ... Heat generating part, 6... Insulating material, 7 ... Encircling body,
8...aluminum plate, 9...steel plate, 10...protective plate.
Claims (1)
板で一体的に構成されて上記発熱部を包囲した包
囲体と、上記発熱部と上記アルミニウム板との間
および上記発熱部と上記鋼板との間にそれぞれ介
在した絶縁材とを具備し、上記アルミニウム板を
伝熱面側として被加熱体に密接して使用される発
熱体において、上記アルミニウム板と上記絶縁材
との間に上記アルミニウム板の熱変形による押圧
力から上記絶縁材を保護する保護板を配設したこ
とを特徴とする発熱体。 A heat generating part, an enclosure integrally formed with an aluminum plate on one side and a steel plate on the other side and surrounding the heat generating part, and between the heat generating part and the aluminum plate and between the heat generating part and the steel plate. In a heating element that is used in close contact with an object to be heated with the aluminum plate as a heat transfer surface side, the aluminum plate is provided with an insulating material interposed between the aluminum plate and the insulating material. A heating element characterized in that a protective plate is provided to protect the insulating material from pressing force due to thermal deformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980149711U JPH0140155Y2 (en) | 1980-10-22 | 1980-10-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980149711U JPH0140155Y2 (en) | 1980-10-22 | 1980-10-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5772593U JPS5772593U (en) | 1982-05-04 |
| JPH0140155Y2 true JPH0140155Y2 (en) | 1989-12-01 |
Family
ID=29509087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980149711U Expired JPH0140155Y2 (en) | 1980-10-22 | 1980-10-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0140155Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS454790Y1 (en) * | 1965-03-13 | 1970-03-05 |
-
1980
- 1980-10-22 JP JP1980149711U patent/JPH0140155Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS454790Y1 (en) * | 1965-03-13 | 1970-03-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5772593U (en) | 1982-05-04 |
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