JPH0416397Y2 - - Google Patents
Info
- Publication number
- JPH0416397Y2 JPH0416397Y2 JP9675586U JP9675586U JPH0416397Y2 JP H0416397 Y2 JPH0416397 Y2 JP H0416397Y2 JP 9675586 U JP9675586 U JP 9675586U JP 9675586 U JP9675586 U JP 9675586U JP H0416397 Y2 JPH0416397 Y2 JP H0416397Y2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- tube
- electric heater
- support
- support rod
- 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
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 11
- 239000013505 freshwater Substances 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 239000012772 electrical insulation material Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Resistance Heating (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は清水等の流体を加熱する加熱器の電熱
ヒータに適用される絶縁構造に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an insulating structure applied to an electric heater of a heater that heats a fluid such as fresh water.
従来の技術
清水等の流体の加熱器は第５図に示すように電
熱ヒータ１を加熱管２に入れた状態で通電し、ケ
ーシング１２内の清水等の流体３を加熱する。こ
の流体は流体入口１３よりケーシング１２内に流
入し、流体出口１４から出る。電熱ヒータ１には
それ自身が絶縁性能をそなえたシースヒータが用
いられているが、使用雰囲気および経年変化によ
つて絶縁性能が低下する場合がある。その対策と
して電熱ヒータ１の固定板としては絶縁板４が用
いられている。この材質としては、ち密質あるい
は粗粒質のセラミツク（コージライトあるいはジ
ルコン）が一般的である。なお、加熱管２に内に
は支持棒５及びストツパ６を配置して絶縁板４の
位置を固定している。符号１５は電熱ヒータ１の
ための電線、１６はスペーサを示す。2. Description of the Related Art As shown in FIG. 5, a heater for a fluid such as fresh water is energized with an electric heater 1 placed in a heating tube 2 to heat a fluid 3 such as fresh water in a casing 12. This fluid flows into the casing 12 through the fluid inlet 13 and exits through the fluid outlet 14. Although the electric heater 1 uses a sheathed heater that itself has insulation performance, the insulation performance may deteriorate depending on the usage atmosphere and aging. As a countermeasure against this, an insulating plate 4 is used as a fixing plate for the electric heater 1. This material is generally dense or coarse-grained ceramic (cordierite or zircon). Note that a support rod 5 and a stopper 6 are arranged inside the heating tube 2 to fix the position of the insulating plate 4. Reference numeral 15 indicates an electric wire for the electric heater 1, and 16 indicates a spacer.
考案が解決しようとする問題点
電熱ヒータ１に通電すると第７図に示すように
絶縁板４の電熱ヒータ用穴４′内が加熱され高温
となる。この加熱速度が急激であつたり、加熱温
度が著しく高温になると、絶縁板４の外縁に引張
応力ｔが発生しクラツクｃが生じる場合がある。Problems to be Solved by the Invention When the electric heater 1 is energized, the inside of the electric heater hole 4' of the insulating plate 4 is heated to a high temperature as shown in FIG. If this heating rate is rapid or the heating temperature becomes extremely high, tensile stress t may occur at the outer edge of the insulating plate 4, causing cracks c.
問題点を解決するための手段
本考案の目的は上述の問題を解決することにあ
る。すなわち本考案は、清水等の流体を加熱する
加熱器の加熱管内にその解放端から挿着される電
熱ヒータの絶縁構造において、前記電熱ヒータを
その軸方向に沿い複数か所においてヒータ支持チ
ユーブで、半径方向のすき間を残すように遊嵌し
て支持し、このように電熱ヒータを遊嵌支持した
ヒータ支持チユーブを、半径方向に延長する固定
板で中心の軸方向に延びる支持棒に固定すると共
に、前記加熱管の円側端面に軸方向に固定した支
持棒用チユーブに対し前記支持棒の先端を半径方
向にも軸方向にもすき間を残し、このすき間に電
気絶縁材を充填して支持させたことを特徴とする
電熱ヒータ絶縁構造にある。Means for Solving the Problems The purpose of the present invention is to solve the above-mentioned problems. That is, the present invention provides an insulating structure for an electric heater that is inserted from its open end into a heating tube of a heater that heats a fluid such as fresh water. , the heater support tube is loosely fitted and supported leaving a gap in the radial direction, and the heater support tube with the electric heater supported loosely in this way is fixed to the central support rod extending in the axial direction with a fixing plate extending in the radial direction. At the same time, the tip of the support rod is left with a gap in both the radial and axial directions with respect to the support rod tube fixed in the axial direction on the circular end surface of the heating tube, and this gap is filled with electrical insulating material to support it. The electric heater has an insulating structure characterized by:
作 用
電熱ヒータは加熱管と接触しないように支持棒
で支持する。支持棒の荷重は電気絶縁材を介して
支持棒用チユーブでささえるため、電熱ヒータと
加熱管とは電気的に絶縁することができる。Function: Support the electric heater with a support rod so that it does not come into contact with the heating tube. Since the load of the support rod is supported by the support rod tube through the electrical insulating material, the electric heater and the heating tube can be electrically insulated.
実施例 第１図〜第４図に１実施例を示す。Example One embodiment is shown in FIGS. 1 to 4.
電熱ヒータ１は第４図に示すように金属のヒー
タ支持チユーブ１０でその熱膨張を拘束しないよ
うにすき間ｂを残して保持する。ヒータ支持チユ
ーブ１０は金属の固定板１１によつて支持棒５に
溶接（ω）して固定される。 As shown in FIG. 4, the electric heater 1 is held by a metal heater support tube 10, leaving a gap b so as not to restrict its thermal expansion. The heater support tube 10 is fixed to the support rod 5 by welding (ω) via a metal fixing plate 11.
第１図に示すように加熱管２の内側端面に支持
棒用チユーブ８を溶接固定し、この支持棒用チユ
ーブ８内に支持棒５の先端を熱膨張を拘束しない
ように半径方向にも軸方向にもすき間ａをあけて
はめ込む。支持棒５と支持棒用チユーブ８の間に
は電気絶縁材９をはさみ込む。 As shown in FIG. 1, a support rod tube 8 is welded and fixed to the inner end surface of the heating tube 2, and the tip of the support rod 5 is placed inside the support rod tube 8 so as to be axially radially and not restrained from thermal expansion. Leave a gap a in both directions and fit. An electrical insulating material 9 is sandwiched between the support rod 5 and the support rod tube 8.
上述のように本考案によれば、電熱ヒータ１を
セラミツク製絶縁板で支持する構造を止め、その
代わりに電熱ヒータ１を金属製のヒータ支持チユ
ーブ１０にすき間ｂを残して支持させ、このヒー
タ支持チユーブ１０を金属の固定板１１で支持棒
５に溶接固定して、加熱管２との接触を防止して
いる。 As described above, according to the present invention, the structure in which the electric heater 1 is supported by a ceramic insulating plate is stopped, and instead, the electric heater 1 is supported by a metal heater support tube 10 with a gap b left, and this heater The support tube 10 is welded and fixed to the support rod 5 with a metal fixing plate 11 to prevent contact with the heating tube 2.
支持棒荷重は加熱管端部で支持するが、支持部
には電気絶縁材９を用いて電気的に絶縁してい
る。加熱による電熱ヒータ１、支持棒５の熱膨張
を拘束しないように、ヒータ支持用チユーブ１０
には半径方向のすき間ｂ、支持棒用チユーブ８に
は半径方向にも軸方向にもすき間ａを設けている
のである。 The support rod load is supported at the end of the heating tube, and the support portion is electrically insulated using an electrical insulating material 9. A heater support tube 10 is installed so as not to restrict the thermal expansion of the electric heater 1 and support rod 5 due to heating.
A gap b is provided in the radial direction, and a gap a is provided in the support rod tube 8 both in the radial direction and in the axial direction.
考案の効果
上述の本考案によれば、絶縁板４が不要とな
り、すき間ｂによつて固定板１１に対する伝熱ヒ
ータ１の熱膨張は逃がされる。また、すき間ａに
よつて軸方向および半径方向の熱膨張も逃がされ
る。このため特別な材料を使用することなく構造
が簡単で信頼性の高い加熱器が実現できる。Effects of the invention According to the invention described above, the insulating plate 4 becomes unnecessary, and the thermal expansion of the heat transfer heater 1 with respect to the fixed plate 11 is released by the gap b. The gap a also allows thermal expansion in the axial and radial directions to escape. Therefore, a heater with a simple structure and high reliability can be realized without using special materials.
第１図、第２図、第３図、第４図はそれぞれ本
考案の一実施例としての加熱器縦断面図、横断面
図および加熱管２の横断面図および縦断面図を示
す。第５図〜第７図は、それぞれ従来の加熱器縦
断面図、横断面図及び絶縁板平面図を示す。
１……電熱ヒータ、２……加熱管、３……清水
等の流体、４……絶縁板、４′……電熱ヒータ用
穴、５……支持棒、５′……支持棒用穴、６……
ストツパ、８……支持棒用チユーブ、９……電気
絶縁材、１０……ヒータ支持チユーブ、１１……
固定板、１２……ケーシング、１３……流体入
口、１４……流体出口、１５……電線、１６……
スペーサ。
1, 2, 3, and 4 respectively show a vertical cross-sectional view and a cross-sectional view of a heater as an embodiment of the present invention, and a cross-sectional view and a vertical cross-sectional view of a heating tube 2. FIGS. 5 to 7 respectively show a longitudinal cross-sectional view, a cross-sectional view, and a plan view of an insulating plate of a conventional heater. 1...Electric heater, 2...Heating tube, 3...Fluid such as fresh water, 4...Insulating plate, 4'...Hole for electric heater, 5...Support rod, 5'...Hole for support rod, 6...
Stopper, 8... Support rod tube, 9... Electrical insulation material, 10... Heater support tube, 11...
Fixed plate, 12...Casing, 13...Fluid inlet, 14...Fluid outlet, 15...Electric wire, 16...
Spacer.
Claims (1)
にその解放端から挿着される電熱ヒータ１の絶縁
構造において、前記電熱ヒータ１をその軸方向に
沿い複数か所においてヒータ支持チユーブ１０
で、半径方向のすき間ｂを残すように遊嵌して支
持し、このように電熱ヒータを遊嵌支持したヒー
タ支持チユーブ１０を、半径方向に延長する固定
板１１で中心の軸方向に延びる支持棒５に固定す
ると共に、前記加熱管２の円側端面に軸方向に固
定した支持棒用チユーブ８に対し前記支持棒５の
先端を半径方向にも軸方向にもすき間ａを残し、
このすき間ａに電気絶縁材９を充填して支持させ
たことを特徴とする電熱ヒータ絶縁構造。 In an insulating structure of an electric heater 1 inserted from its open end into a heating tube 2 of a heater that heats a fluid 3 such as fresh water, the electric heater 1 is provided with heater support tubes 10 at multiple locations along its axial direction.
The heater support tube 10 is loosely fitted and supported so as to leave a radial gap b, and the heater support tube 10, in which the electric heater is loosely fitted and supported, is supported by a fixing plate 11 extending in the radial direction and extending in the axial direction at the center. A gap a is left between the tip of the support rod 5 in both the radial and axial directions with respect to the support rod tube 8 which is fixed to the rod 5 and axially fixed to the circular end surface of the heating tube 2;
An electric heater insulating structure characterized in that this gap a is filled with an electrical insulating material 9 for support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9675586U JPH0416397Y2 (en) | 1986-06-26 | 1986-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9675586U JPH0416397Y2 (en) | 1986-06-26 | 1986-06-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS634094U JPS634094U (en) | 1988-01-12 |
| JPH0416397Y2 true JPH0416397Y2 (en) | 1992-04-13 |
Family
ID=30962871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9675586U Expired JPH0416397Y2 (en) | 1986-06-26 | 1986-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0416397Y2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100445713B1 (en) * | 1996-09-09 | 2004-10-14 | 니찌아스 카부시키카이샤 | Fluid heating device |
| SE525477C2 (en) * | 2003-07-10 | 2005-03-01 | Sandvik Ab | Electric heating element with radiation tube |
| EP4344347A1 (en) * | 2021-05-18 | 2024-03-27 | Niterra Co., Ltd. | Liquid heating device |
| JP2023101142A (en) * | 2022-01-07 | 2023-07-20 | 日本特殊陶業株式会社 | liquid heating device |
| JP2023157123A (en) * | 2022-04-14 | 2023-10-26 | 日本特殊陶業株式会社 | liquid heating device |
-
1986
- 1986-06-26 JP JP9675586U patent/JPH0416397Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS634094U (en) | 1988-01-12 |
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