JP5348487B2 - Thin plate heater structure - Google Patents

Thin plate heater structure Download PDF

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JP5348487B2
JP5348487B2 JP2009160465A JP2009160465A JP5348487B2 JP 5348487 B2 JP5348487 B2 JP 5348487B2 JP 2009160465 A JP2009160465 A JP 2009160465A JP 2009160465 A JP2009160465 A JP 2009160465A JP 5348487 B2 JP5348487 B2 JP 5348487B2
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steel plate
plate
holding body
heating element
mica
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JP2011017454A (en
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省吾 吉岡
直哉 金原
敏彦 渥美
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Shizuoka Seiki Co Ltd
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Shizuoka Seiki Co Ltd
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Description

この発明は薄板状ヒータ構造に係り、特に発熱素材としてマイカ板を使用する発熱体を利用したヒータにおいて、このヒータの大型化及び薄板状構造の実現を図る薄板状ヒータ構造に関するものである。   The present invention relates to a thin-plate heater structure, and more particularly to a thin-plate heater structure that achieves an increase in size of the heater and realization of a thin-plate structure in a heater using a heating element that uses a mica plate as a heat-generating material.

薄板状ヒータ(「面状発熱体」とも換言できる。)は、熱源として電熱線を使用し、発熱素材としてマイカ板を使用している。
なお、参考までに記載すると、「マイカ(mica)」は、天然の鉱物であり、日本語では「雲母」と言う。
そして、「マイカ」は、電気絶縁性や耐熱性に優れ、へき開性を持ち、薄片状に形成でき、しかも安価であるため、一般的に電気絶縁材料として使用されている。
また、前記薄板状ヒータは、広い面積を均一に加熱するために、金属表面から赤外線を積極的に輻射することを意図したものであり、電気ヒータや工業用乾燥炉の熱源ユニットなどに利用されている。
Thin plate heaters (which can also be referred to as “planar heating elements”) use heating wires as heat sources and mica plates as heat generating materials.
For reference, “mica” is a natural mineral and is called “mica” in Japanese.
“Mica” is generally used as an electrical insulating material because it is excellent in electrical insulation and heat resistance, has a cleavage property, can be formed into a thin piece, and is inexpensive.
The thin plate heater is intended to positively radiate infrared rays from the metal surface in order to uniformly heat a large area, and is used for a heat source unit of an electric heater or an industrial drying furnace. ing.

特開平8−14581号公報JP-A-8-14581 実開昭57−91012号公報Japanese Utility Model Publication No. 57-91012

ところで、従来のヒータにおいては、以下の3つのものが考えられる。
(1)セラミック素材に電熱線を埋没させて、電熱線を加熱すると同時にセラミック素材を加熱し、赤外線を輻射するもの。
(2)厚板の金属板構造で保持した剛体構造のもの。
(3)マイカの発熱体を露出させた保護構造の無いもの。
By the way, in the conventional heater, the following three things can be considered.
(1) Heating wire is buried in a ceramic material to heat the heating wire and simultaneously heat the ceramic material to radiate infrared rays.
(2) A rigid structure held by a thick metal plate structure.
(3) No protection structure with exposed mica heating element.

しかし、上記(1)のものの場合には、セラミック素材に電熱線を埋没させた構造とするため、ヒータを大型構造とすることが困難であるという不都合がある。
また、上記(2)のものの場合には、厚板による剛体構造であるため、大型化は可能であるが、薄板状構造及び軽量化が困難であるという不都合がある。
更に、上記(3)のものの場合には、マイカの発熱体自体を加熱するため、赤外線輻射率が低く、輻射赤外線量を増加させる必要がある
という不都合がある。
However, in the case of the above (1), since the heating wire is embedded in the ceramic material, it is difficult to make the heater large-sized.
In the case of the above (2), since it is a rigid structure with a thick plate, it is possible to increase the size, but there is an inconvenience that it is difficult to reduce the thickness and weight.
Furthermore, in the case of the above (3), since the mica heating element itself is heated, there is an inconvenience that the infrared radiation rate is low and the amount of radiation infrared radiation needs to be increased.

また、前記ヒータを形成する際に、マイカ板からなる発熱体の前面及び後面を金属製の保持体によって保持するものがある。
このとき、保持体の全面においてネジ固定する方策も考えられるが、保持体の前面にネジ頭が見えてしまうため、ネジ固定の方策を廃止し、折り返しによるヘミング加工を施しているものがある。
このヘミング加工を施したものにおいては、発熱体と保持体との夫々の外周部位が固定される。
前記発熱体と保持体とにヘミング加工を施して平面状の前記ヒータを形成した際には、発熱体と保持体との間に隙間は現出していない。
しかし、前記ヒータを使用すると、マイカ板からなる発熱体と金属製の保持体との熱膨張率が異なるとともに、マイカ板からなる発熱体の温度ムラによるランダムな反りの発生によって、発熱体と保持体との間に隙間ができてしまうという不都合がある。
追記すれば、マイカ板からなる発熱体の反りは、一定の方向に反るのではないとともに、反り方も場所によって相違するため、発熱体と保持体との間において微小な隙間のみでなく、大きな隙間も現出してしまうものであった。
この結果、発熱体と保持体との間に現出する隙間、つまり空気層によって、熱移動が妨げられ、ヒート温度に大きく影響が出てしまうという不都合がある。
Moreover, when forming the said heater, there exists what hold | maintains the front surface and rear surface of the heat generating body which consist of a mica board with a metal holding body.
At this time, a method of fixing the screw on the entire surface of the holding body is also conceivable. However, since the screw head can be seen on the front surface of the holding body, the screw fixing method is abolished and a hemming process by folding is performed.
In the case where the hemming is performed, the outer peripheral portions of the heating element and the holding body are fixed.
When the heating element and the holding body are hemmed to form the planar heater, no gap appears between the heating element and the holding body.
However, when the heater is used, the thermal expansion coefficient differs between the heating element made of mica plate and the metal holding body, and the heating element and the holding body are caused by the occurrence of random warpage due to temperature unevenness of the heating element made of mica plate. There is a disadvantage that a gap is formed between the body and the body.
If you add, the warp of the heating element made of mica plate does not warp in a certain direction, and the way of warping also varies depending on the location, so not only a minute gap between the heating element and the holding body, A big gap would appear.
As a result, there is an inconvenience that the heat transfer is hindered by the gap appearing between the heating element and the holding body, that is, the air layer, and the heat temperature is greatly affected.

この発明の目的は、熱伝達の効率を向上させ、ヒータの大型化及び薄板状構造を実現することにある。   An object of the present invention is to improve the efficiency of heat transfer, to realize a large heater and a thin plate structure.

そこで、この発明は、上述不都合を除去するために、電熱線により発熱する発熱体と、この発熱体を保持する保持体と、この保持体を収納するケースとを備えるヒータ構造において、前記発熱体は、前記電熱線を巻き掛けたマイカ板からなる芯材と、この芯材の前後に位置する前側マイカ板及び後側マイカ板とを有し、前記芯材を前側マイカ板及び後側マイカ板によって挟み込む三層構造とし、前記保持体は、前記発熱体の前面に位置する放射用の表面処理を施したスチール板と、前記発熱体の後面に位置する前記スチール板よりも膨張率の大きいステンレス板とを有し、前記発熱体の前後をスチール板とステンレス板とにより保持して前面側のスチール板が前方向に突出する凸形状とし、この保持体を前記ケースに収納する際には、保持体の凸形状を維持するように、保持体の後面に断熱材を介して補強板を設けるとともに、保持体の前面に位置する前記スチール板の両側を線接触にて保持する前面固定金具を設けたことを特徴とする。   Therefore, in order to eliminate the above-described disadvantages, the present invention provides a heater structure including a heating element that generates heat by a heating wire, a holding body that holds the heating element, and a case that houses the holding body. Has a core material made of a mica plate around which the heating wire is wound, and a front mica plate and a rear mica plate positioned before and after the core material, the core material being a front mica plate and a rear mica plate The holding body is made of a steel plate that has been subjected to a surface treatment for radiation located on the front surface of the heating element, and a stainless steel that has a higher expansion coefficient than the steel plate that is located on the rear surface of the heating element. When the front and rear steel plates protrude in the forward direction by holding the front and rear of the heating element with a steel plate and a stainless steel plate, and when storing this holding body in the case, Holding body In order to maintain the convex shape, a reinforcing plate is provided on the rear surface of the holding body via a heat insulating material, and a front fixing bracket for holding both sides of the steel plate located on the front surface of the holding body by line contact is provided. It is characterized by.

以上詳細に説明した如くこの発明によれば、電熱線により発熱する発熱体と、発熱体を保持する保持体と、保持体を収納するケースとを備えるヒータ構造において、発熱体は、電熱線を巻き掛けたマイカ板からなる芯材と、芯材の前後に位置する前側マイカ板及び後側マイカ板とを有し、芯材を前側マイカ板及び後側マイカ板によって挟み込む三層構造とし、保持体は、発熱体の前面に位置する放射用の表面処理を施したスチール板と、発熱体の後面に位置するスチール板よりも膨張率の大きいステンレス板とを有し、発熱体の前後をスチール板とステンレス板とにより保持して前面側のスチール板が前方向に突出する凸形状とし、保持体を前記ケースに収納する際には、保持体の凸形状を維持するように、保持体の後面に断熱材を介して補強板を設けるとともに、保持体の前面に位置するスチール板の両側を線接触にて保持する前面固定金具を設けた。
従って、前記保持体の熱膨張の方向が三層構造(「三層サンドイッチ構造」ともいう。)が密着する方向であるとともに、前記ケースへの保持体の収納状態がスチール板が前方向に突出する凸形状であることにより、保持体のスチール板と前記発熱体との間に隙間が現出されるおそれが全くなく、保持体前面のスチール板への熱伝達の効率を向上させることができる。
これにより、赤外線放射効率を上げることができる。
また、前記保持体は、前面側のスチール板が前方向に突出する凸形状として前記ケースに収納する際に、保持体のスチール板の両側を前面固定金具によって線接触にて保持することにより、スチール板の両側以外は固定されておらず、移動が自由な状態であるため、スチール板が熱膨張してもスチール板の形状を維持することができる。
つまり、スチール板の両側が膨張・収縮によって前面固定金具の線接触部位をスライド移動する。
これにより、ヒータの大型化及び薄板状構造を実現することができる。
そして、発熱素材のマイカ板からなる前記発熱体は、前面のスチール板と後面のステンレス板とを有する前記保持体によって保護されているので、ヒータの機械的強度を向上させることができ、外力が掛かることによる漏電や感電などのリスクを低くし得て、実用上有利である。
As described above in detail, according to the present invention, in the heater structure including the heating element that generates heat by the heating wire, the holding body that holds the heating element, and the case that houses the holding body, the heating element uses the heating wire. It has a three-layer structure that has a core material made up of wound mica plates, and a front mica plate and a rear mica plate located before and after the core material, and the core material is sandwiched between the front mica plate and the rear mica plate The body has a steel plate with a surface treatment for radiation located on the front surface of the heating element and a stainless steel plate with a higher expansion coefficient than the steel plate located on the rear surface of the heating element. The steel plate on the front side is held in a convex shape that is held forward by the steel plate and the stainless steel plate, and when the holding body is stored in the case, the convex shape of the holding body is maintained. It is supplemented via a heat insulating material on the rear surface. Provided with a plate, provided with a front fixing member which holds both sides of steel plate located in front of the holding member at line contact.
Therefore, the direction of thermal expansion of the holding body is a direction in which a three-layer structure (also referred to as a “three-layer sandwich structure”) is in close contact, and the storage state of the holding body in the case is that the steel plate protrudes forward. Due to the convex shape, there is no possibility that a gap appears between the steel plate of the holding body and the heating element, and the efficiency of heat transfer to the steel plate on the front surface of the holding body can be improved. .
Thereby, infrared radiation efficiency can be raised.
Further, when the holding body is housed in the case as a convex shape in which the steel plate on the front side protrudes in the forward direction, by holding the both sides of the steel plate of the holding body in line contact with the front fixing bracket, Since only the both sides of the steel plate are fixed and are free to move, the shape of the steel plate can be maintained even if the steel plate is thermally expanded.
That is, both sides of the steel plate slide and move along the line contact portion of the front fixing bracket by expansion and contraction.
Thereby, the enlargement of a heater and a thin plate-like structure are realizable.
And since the said heat generating body consisting of the mica plate of the heat generating material is protected by the holding body having the front steel plate and the rear stainless steel plate, the mechanical strength of the heater can be improved, and the external force is increased. Risks such as electric leakage and electric shock due to application can be reduced, which is practically advantageous.

図1は薄板状ヒータの概略断面図である。(実施例1)FIG. 1 is a schematic sectional view of a thin plate heater. Example 1 図2は発熱体を示し、(a)は発熱体の一部切り欠き正面図、(b)は発熱体の平面図である。(実施例1)FIG. 2 shows a heating element, (a) is a partially cutaway front view of the heating element, and (b) is a plan view of the heating element. Example 1 図3は発熱体を保持した保持体を示し、(a)は保持体の背面図、(b)は保持体の平面図、(c)は保持体の右側面図である。(実施例1)3A and 3B show a holding body holding a heating element, where FIG. 3A is a rear view of the holding body, FIG. 3B is a plan view of the holding body, and FIG. 3C is a right side view of the holding body. Example 1 図4は図3(b)の矢視A部分の概略拡大図である。(実施例1)FIG. 4 is a schematic enlarged view of a portion indicated by an arrow A in FIG. Example 1 図5は保持体の要部拡大断面図である。(実施例1)FIG. 5 is an enlarged cross-sectional view of a main part of the holding body. Example 1

以下図面に基づいてこの発明の実施例を詳細に説明する。   Embodiments of the present invention will be described below in detail with reference to the drawings.

図1〜図5はこの発明の実施例を示すものである。
図1において、1は薄板状ヒータである。
この薄板状ヒータ1は、図1〜図3に示す如く、電熱線(「ヒータ線」ともいう。)2により発熱する発熱体3と、この発熱体3を保持する保持体4と、この保持体4を収納するケース5とを備える。
1 to 5 show an embodiment of the present invention.
In FIG. 1, reference numeral 1 denotes a thin plate heater.
As shown in FIGS. 1 to 3, the thin plate heater 1 includes a heating element 3 that generates heat by a heating wire (also referred to as a “heater wire”) 2, a holding body 4 that holds the heating element 3, and A case 5 for housing the body 4.

そして、前記発熱体3は、図2に示す如く、片面または両面に前記電熱線2を巻き掛けた絶縁用マイカ板からなる芯材6と、この芯材6の前後に位置する前側マイカ板7及び後側マイカ板8とを有している。
このとき、前記芯材6を前側マイカ板7及び後側マイカ板8によって挟み込み、前記発熱体3を三層構造としている。
この発熱体3の三層構造を維持するために、複数の所定の箇所にハトメ9を設け、このハトメ9によって芯材6とこの芯材6の前後に位置する前側マイカ板7及び後側マイカ板8とを固定する。
As shown in FIG. 2, the heating element 3 includes a core member 6 made of an insulating mica plate around which the heating wire 2 is wound on one or both sides, and a front mica plate 7 positioned before and after the core member 6. And a rear mica plate 8.
At this time, the core material 6 is sandwiched between the front mica plate 7 and the rear mica plate 8, and the heating element 3 has a three-layer structure.
In order to maintain the three-layer structure of the heating element 3, eyelets 9 are provided at a plurality of predetermined locations, and the core material 6 and the front mica plate 7 and the rear mica located before and after the core material 6 by the eyelets 9. The plate 8 is fixed.

なお、前記芯材6を形成する際には、例えば図2に示す如く、前記発熱体3の上下方向を3分割し、3個の第1〜第3芯材6−1、6−2、6−3を設け、第1〜第3芯材6−1、6−2、6−3の夫々に前記電熱線2を巻き掛ける。
このとき、第1〜第3芯材6−1、6−2、6−3の夫々に前記電熱線2を巻き掛ける際には、1本の電熱線2に対して2本のニッケル線10、10によって挟む(「サンドする」)ように巻き掛ける。
When forming the core member 6, for example, as shown in FIG. 2, the vertical direction of the heating element 3 is divided into three parts, and three first to third core members 6-1, 6-2, 6-3 is provided, and the heating wire 2 is wound around each of the first to third core members 6-1, 6-2, 6-3.
At this time, when the heating wire 2 is wound around each of the first to third core members 6-1, 6-2, 6-3, two nickel wires 10 are wound on one heating wire 2. 10 so as to be sandwiched (“sanded”) by 10.

前記保持体4は、前記発熱体3の前面に位置する放射用の表面処理を施したスチール板11と、前記発熱体3の後面に位置する前記スチール板11よりも膨張率の大きいステンレス板12とを有し、前記発熱体3の前後をスチール板11とステンレス板12とにより保持する。
すなわち、前記スチール板11の表面処理として放射塗料13を塗布する。
また、前記発熱体3の前後をスチール板11とステンレス板12とにより保持する際に、図3に示す如く、発熱体3と後面のステンレス板12とをほぼ同一寸法に形成するとともに、前面のスチール板11を発熱体3やステンレス板12よりも少し大きな寸法に形成し、スチール板11の4辺をステンレス板12側に折り返してヘミング加工を施す。
このとき、前記ステンレス板12には、前記1本の電熱線2や2本のニッケル線10、10などの線部材14を引き出すための開口部15を形成する。
そして、この開口部15においては、図4に示す如く、1本の電熱線2及び2本のニッケル線10、10などの線部材14を引き出した後に、開口部15近傍を絶縁チューブ16によって被覆し、この絶縁チューブ16の開口部15側を耐熱シリコンシーラント17にて覆う。
なお、1本の電熱線2及び2本のニッケル線10、10などの線部材14の引っ張り強度を8kg以上とする。
前記発熱体3を保持する保持体4は、図5に示す如く、三層構造の発熱体3の前後をスチール板11とステンレス板12とにより保持するため、合計で5層の構造を有している。
The holding body 4 includes a steel plate 11 that has been subjected to a surface treatment for radiation located on the front surface of the heating element 3, and a stainless steel plate 12 that has a higher expansion coefficient than the steel plate 11 located on the rear surface of the heating element 3. The front and rear of the heating element 3 are held by a steel plate 11 and a stainless plate 12.
That is, the radiation coating 13 is applied as a surface treatment of the steel plate 11.
Further, when the front and rear of the heating element 3 are held by the steel plate 11 and the stainless steel plate 12, as shown in FIG. 3, the heating element 3 and the rear stainless steel plate 12 are formed with substantially the same dimensions, The steel plate 11 is formed to have a slightly larger size than the heating element 3 and the stainless plate 12, and the four sides of the steel plate 11 are folded back toward the stainless plate 12 to perform hemming.
At this time, the stainless steel plate 12 is formed with an opening 15 for drawing out the wire member 14 such as the one heating wire 2 or the two nickel wires 10 and 10.
Then, in this opening 15, as shown in FIG. 4, after the wire member 14 such as one heating wire 2 and two nickel wires 10, 10 is drawn out, the vicinity of the opening 15 is covered with an insulating tube 16. Then, the opening 15 side of the insulating tube 16 is covered with a heat-resistant silicon sealant 17.
The tensile strength of the wire member 14 such as one heating wire 2 and two nickel wires 10 and 10 is 8 kg or more.
As shown in FIG. 5, the holding body 4 for holding the heating element 3 has a total of five layers because the steel plate 11 and the stainless plate 12 hold the front and rear of the three-layer heating element 3. ing.

更に、前記保持体4を前記ケース5に収納する際には、前面側のスチール板11が前方向に突出する保持体4の凸形状を維持するように、保持体4の後面に断熱材18を介して補強板19を設けるとともに、保持体4の前面に位置する前記スチール板11の両側を線接触にて保持する前面固定金具20を設ける構成とする。
詳述すれば、前記ケース5は、図1に示す如く、保持体4を収納するヒータケース部21と、このヒータケース部21の外周及び後面を覆う外装フレーム部22とを備えている。
また、ヒータケース部21の左右両端に前面固定金具20を取り付けている。
そして、前記ケース5のヒータケース部21内に保持体4を収納する際には、まず、ヒータケース部21内に前方向に突出する補強板19を位置させ、この補強板19の前面に断熱材18を位置させる。
次に、この断熱材18の前面に前記保持体4を位置させ、保持体4の前面に位置する前記スチール板11の左右両側を前面固定金具20によって線接触にて保持し、前面側のスチール板11が前方向に突出する保持体4の凸形状、つまり横方向において凸形状である平面視で保持体4の凸形状を維持するように取り付ける。
なお、上記の取り付け手順に関しては、保持体4や補強板19、断熱材18が夫々別体に形成される際の手順として説明したが、保持体4と補強板19と断熱材18とを一体的に形成する場合には、1工程による取り付け手順とすることが可能である。
Further, when the holding body 4 is housed in the case 5, the heat insulating material 18 is provided on the rear surface of the holding body 4 so that the steel plate 11 on the front side maintains the convex shape of the holding body 4 protruding forward. The reinforcing plate 19 is provided via the front plate, and the front fixing bracket 20 that holds both sides of the steel plate 11 located on the front surface of the holding body 4 by line contact is provided.
Specifically, as shown in FIG. 1, the case 5 includes a heater case portion 21 that houses the holding body 4 and an exterior frame portion 22 that covers the outer periphery and the rear surface of the heater case portion 21.
Further, front fixing brackets 20 are attached to the left and right ends of the heater case portion 21.
When the holder 4 is housed in the heater case portion 21 of the case 5, first, the reinforcing plate 19 protruding forward is positioned in the heater case portion 21, and the front surface of the reinforcing plate 19 is insulated. The material 18 is positioned.
Next, the holding body 4 is positioned on the front surface of the heat insulating material 18, and the left and right sides of the steel plate 11 positioned on the front surface of the holding body 4 are held in line contact by the front fixing bracket 20, and the front side steel is The plate 11 is attached so as to maintain the convex shape of the holding body 4 in a plan view in which the plate 11 protrudes in the forward direction, that is, the convex shape in the lateral direction.
In addition, although said attachment procedure demonstrated as a procedure at the time of forming the holding body 4, the reinforcement board 19, and the heat insulating material 18 in a different body, respectively, the holding body 4, the reinforcement board 19, and the heat insulating material 18 are integrated. In the case of forming it manually, it is possible to adopt an attachment procedure by one process.

これにより、前記電熱線2により発熱する発熱体3と、この発熱体3を保持する保持体4と、この保持体4を収納するケース5とを備えるヒータ構造において、前記発熱体3は、前記電熱線2を巻き掛けたマイカ板からなる芯材6と、この芯材6の前後に位置する前側マイカ板7及び後側マイカ板8とを有し、前記芯材6を前側マイカ板7及び後側マイカ板8によって挟み込む三層構造とし、前記保持体4は、前記発熱体3の前面に位置する放射用の表面処理を施したスチール板11と、前記発熱体3の後面に位置する前記スチール板11よりも膨張率の大きいステンレス板12とを有し、前記発熱体3の前後をスチール板11とステンレス板12とにより保持して前面側のスチール板11が前方向に突出する凸形状とし、この保持体4を前記ケース5に収納する際には、保持体4の凸形状を維持するように、保持体4の後面に断熱材18を介して補強板19を設けるとともに、保持体4の前面に位置する前記スチール板11の両側を線接触にて保持する前面固定金具20を設けた。
従って、前記保持体4の熱膨張の方向が三層構造(「三層サンドイッチ構造」ともいう。)が密着する方向であるとともに、前記ケース5への保持体4の収納状態がスチール板11が前方向に突出する凸形状であることにより、保持体4のスチール板11と前記発熱体3との間に隙間が現出されるおそれが全くなく、保持体4前面のスチール板11への熱伝達の効率を向上させることができる。
これにより、赤外線放射効率を上げることができる。
また、前記保持体4は、前面側のスチール板11が前方向に突出する凸形状として前記ケース5に収納する際に、保持体4のスチール板11の両側を前面固定金具20によって線接触にて保持することにより、スチール板11の両側以外は固定されておらず、移動が自由な状態であるため、スチール板11が熱膨張してもスチール板11の形状を維持することができる。
つまり、スチール板11の両側が膨張・収縮によって前面固定金具20の線接触部位をスライド移動する。
これにより、前記ヒータ1の大型化及び薄板状構造を実現することができる。
そして、発熱素材のマイカ板からなる前記発熱体3は、前面のスチール板11と後面のステンレス板12とを有する前記保持体4によって保護されているので、ヒータ1の機械的強度を向上させることができ、外力が掛かることによる漏電や感電などのリスクを低くし得て、実用上有利である。
Thereby, in the heater structure including the heating element 3 that generates heat by the heating wire 2, the holding body 4 that holds the heating element 3, and the case 5 that stores the holding body 4, the heating element 3 It has a core material 6 made of a mica plate around which the heating wire 2 is wound, and a front mica plate 7 and a rear mica plate 8 positioned before and after the core material 6, and the core material 6 is connected to the front mica plate 7 and A three-layer structure sandwiched between rear mica plates 8, the holding body 4 is a steel plate 11 that has been subjected to a surface treatment for radiation located on the front surface of the heating element 3, and the heating element 3 is located on the rear surface of the heating element 3. A convex plate that has a stainless steel plate 12 having a larger expansion coefficient than the steel plate 11, and the front and rear steel plates 11 protrude forward while the front and rear of the heating element 3 are held by the steel plate 11 and the stainless steel plate 12. And this holder 4 in front When housed in the case 5, a reinforcing plate 19 is provided on the rear surface of the holding body 4 via a heat insulating material 18 so as to maintain the convex shape of the holding body 4, and the steel positioned on the front surface of the holding body 4. A front fixing bracket 20 that holds both sides of the plate 11 by line contact is provided.
Accordingly, the direction of thermal expansion of the holding body 4 is a direction in which a three-layer structure (also referred to as “three-layer sandwich structure”) is in close contact, and the storage state of the holding body 4 in the case 5 is the steel plate 11. Due to the convex shape protruding in the forward direction, there is no possibility of a gap appearing between the steel plate 11 of the holding body 4 and the heating element 3, and heat to the steel plate 11 on the front surface of the holding body 4 is eliminated. The transmission efficiency can be improved.
Thereby, infrared radiation efficiency can be raised.
Further, when the holding body 4 is housed in the case 5 as a convex shape in which the steel plate 11 on the front side protrudes forward, both sides of the steel plate 11 of the holding body 4 are brought into line contact by the front fixing bracket 20. By holding the steel plate 11, the sides other than both sides of the steel plate 11 are not fixed and can move freely, so that the shape of the steel plate 11 can be maintained even if the steel plate 11 is thermally expanded.
That is, both sides of the steel plate 11 slide and move along the line contact portion of the front fixing bracket 20 by expansion and contraction.
Thereby, the enlargement of the heater 1 and a thin plate-like structure can be realized.
And since the said heat generating body 3 which consists of a mica board of a heat generating material is protected by the said holding body 4 which has the steel plate 11 of the front surface and the stainless steel plate 12 of the rear surface, it improves the mechanical strength of the heater 1. It is possible to reduce the risk of electric leakage and electric shock due to external force, which is practically advantageous.

なお、この発明は上述実施例に限定されるものではなく、種々の応用改変が可能である。   The present invention is not limited to the above-described embodiments, and various application modifications are possible.

例えば、この発明の実施例においては、スチール板が前方向に突出する保持体の凸形状、つまり横方向において凸形状である平面視で保持体の凸形状を維持し、かつ保持体を横方向で固定するために、ヒータケース部の左右両端に前面固定金具を取り付ける構成としたが、この前面固定金具をヒータケース部の上下端に取り付ける、つまり保持体を縦方向で固定する特別構成とすることも可能である。
すなわち、薄板状ヒータ構造においては、ヒータケース部や外装フレーム部の形状、あるいは補強板の取付位置なども考慮する必要がある。
そして、ヒータケース部や外装フレーム部の形状、あるいは補強板の取付位置などによって、保持体の固定位置が上下位置のみに制限される場合も考えられる。
このとき、前記前面固定金具をヒータケース部の上下端に取付可能として、スチール板が前方向に突出する保持体の凸形状、つまり縦方向において凸形状である側面視で保持体の凸形状を維持し、汎用性を高めるものである。
なお、参考までに記載すると、前記ケースに前記保持体を収納する際の保持体の固定位置においては、上下位置に比べて、左右位置の方が隙間が出難いという実験結果が得られているため、上下位置の使用頻度は低いものと考えられるが、発熱体や保持体に使用される板状材料の厚みや保持体の材料、凸形状、つまり曲面の度合いなどによっては使用頻度が変化する可能性があるため、この発明の実施例の改良案として開示した。
For example, in the embodiment of the present invention, the convex shape of the holding body in which the steel plate protrudes in the forward direction, that is, the convex shape of the holding body is maintained in a plan view that is a convex shape in the lateral direction, and the holding body is lateral The front fixing brackets are attached to the left and right ends of the heater case part to fix the heater case part, but the front fixing brackets are attached to the upper and lower ends of the heater case part, that is, the holding body is fixed in the vertical direction. It is also possible.
That is, in the thin plate-like heater structure, it is necessary to consider the shape of the heater case portion and the exterior frame portion, the attachment position of the reinforcing plate, and the like.
And the case where the fixing position of a holding body is restrict | limited only to an up-and-down position by the shape of a heater case part or an exterior frame part, the attachment position of a reinforcement board, etc. is also considered.
At this time, the front fixing bracket can be attached to the upper and lower ends of the heater case portion, and the convex shape of the holding body in which the steel plate protrudes in the forward direction, that is, the convex shape of the holding body in a side view that is convex in the vertical direction. Maintain and increase versatility.
For reference, an experimental result has been obtained that the holding position of the holding body when the holding body is stored in the case is less likely to have a gap at the left and right positions than at the vertical position. Therefore, the frequency of use in the vertical position is considered to be low, but the frequency of use varies depending on the thickness of the plate-like material used for the heating element and the holder, the material of the holder, the convex shape, that is, the degree of the curved surface, etc. Since there is a possibility, it disclosed as an improvement plan of the Example of this invention.

1 薄板状ヒータ
2 電熱線(「ヒータ線」ともいう。)
3 発熱体
4 保持体
5 ケース
6 芯材
6−1、6−2、6−3 第1〜第3芯材
7 前側マイカ板
8 後側マイカ板
9 ハトメ
10、10 ニッケル線
11 スチール板
12 ステンレス板
13 放射塗料
14 線部材
15 開口部
16 絶縁チューブ
17 耐熱シリコンシーラント
18 断熱材
19 補強板
20 前面固定金具
21 ヒータケース部
22 外装フレーム部
1 Thin plate heater 2 Heating wire (also referred to as “heater wire”)
DESCRIPTION OF SYMBOLS 3 Heat generating body 4 Holding body 5 Case 6 Core material 6-1, 6-2, 6-3 1st-3rd core material 7 Front mica plate 8 Rear mica plate 9 Eyelet 10, 10 Nickel wire 11 Steel plate 12 Stainless steel Plate 13 Radiant paint 14 Wire member 15 Opening portion 16 Insulating tube 17 Heat-resistant silicon sealant 18 Heat insulating material 19 Reinforcing plate 20 Front fixing bracket 21 Heater case portion 22 Exterior frame portion

Claims (1)

電熱線により発熱する発熱体と、この発熱体を保持する保持体と、この保持体を収納するケースとを備えるヒータ構造において、前記発熱体は、前記電熱線を巻き掛けたマイカ板からなる芯材と、この芯材の前後に位置する前側マイカ板及び後側マイカ板とを有し、前記芯材を前側マイカ板及び後側マイカ板によって挟み込む三層構造とし、前記保持体は、前記発熱体の前面に位置する放射用の表面処理を施したスチール板と、前記発熱体の後面に位置する前記スチール板よりも膨張率の大きいステンレス板とを有し、前記発熱体の前後をスチール板とステンレス板とにより保持して前面側のスチール板が前方向に突出する凸形状とし、この保持体を前記ケースに収納する際には、保持体の凸形状を維持するように、保持体の後面に断熱材を介して補強板を設けるとともに、保持体の前面に位置する前記スチール板の両側を線接触にて保持する前面固定金具を設けたことを特徴とする薄板状ヒータ構造。   In a heater structure including a heating element that generates heat by a heating wire, a holding body that holds the heating element, and a case that houses the holding body, the heating element is a core made of a mica plate around which the heating wire is wound. And a three-layer structure in which the core material is sandwiched between the front mica plate and the rear mica plate, and the holding body generates the heat. A steel plate having a surface treatment for radiation located on the front surface of the body, and a stainless steel plate having a larger expansion coefficient than the steel plate located on the rear surface of the heating element, and the steel plate before and after the heating element And a stainless steel plate so that the steel plate on the front side protrudes forward, and when the holder is stored in the case, the convex shape of the holder is maintained so that the convex shape of the holder is maintained. Insulation on the back And provided with a reinforcing plate, thin plate heater structure characterized in that a front fixing member which holds both sides of the steel plate located in front of the holding member at line contact.
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JPS63160190A (en) * 1986-12-23 1988-07-02 株式会社 陽光 Infrared radiation heater
JP2000213760A (en) * 1999-01-20 2000-08-02 Sadatoshi Yamashita Panel heater for toilet
JP3362028B2 (en) * 2000-09-21 2003-01-07 株式会社アールシーエス Far infrared panel heater unit
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