JP5529002B2 - Sheet heater - Google Patents

Sheet heater Download PDF

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Publication number
JP5529002B2
JP5529002B2 JP2010291444A JP2010291444A JP5529002B2 JP 5529002 B2 JP5529002 B2 JP 5529002B2 JP 2010291444 A JP2010291444 A JP 2010291444A JP 2010291444 A JP2010291444 A JP 2010291444A JP 5529002 B2 JP5529002 B2 JP 5529002B2
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planar heater
glass cloth
pipe
glass
glass fiber
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JP2012138308A (en
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浩二 野口
功一郎 竹内
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Japan Pionics Ltd
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Japan Pionics Ltd
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Priority to KR1020110138377A priority patent/KR20120075371A/en
Priority to TW100148764A priority patent/TWI461092B/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/36—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/004—Heaters using a particular layout for the resistive material or resistive elements using zigzag layout

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  • Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)

Description

本発明は、円筒形または曲管形の形状を有する配管を加熱するための電気エネルギーを利用する面状ヒータに関するものである。更に詳細には、１５０℃〜４００℃の高温領域を含む広い温度領域の加熱が可能で、優れた耐熱性、断熱性を有し、軽量な面状ヒータに関するものである。   The present invention relates to a planar heater that uses electrical energy for heating a pipe having a cylindrical or curved pipe shape. More specifically, the present invention relates to a lightweight planar heater that can be heated in a wide temperature range including a high temperature range of 150 ° C. to 400 ° C., has excellent heat resistance and heat insulation.

従来から、各種配管の外側表面に取付けて、配管内を流通する流体を加熱するための面状ヒータ（マントルヒータ、ジャケットヒータ）が広く利用されている。
このようなヒータの発熱素子としては、金属粉末、あるいは金属酸化物粉末等を含む合成樹脂（導電性樹脂）を用いて、ガラスクロスに含浸させたもの、前記のような導電性樹脂をポリエステル、ポリイミド、マイカ等の絶縁基材シートに塗布または印刷により保持させたもの、金属箔をエッチングして回路としたもの、あるいは金属抵抗線を絶縁基板シートに張り巡らして回路としたもの等が使用されている。 2. Description of the Related Art Conventionally, planar heaters (mantle heaters, jacket heaters) that are attached to the outer surface of various pipes and heat fluid flowing through the pipes have been widely used.
As a heater element of such a heater, a synthetic resin (conductive resin) containing metal powder or metal oxide powder, etc., impregnated into a glass cloth, such a conductive resin as described above, polyester, Used are those that are held on an insulating base sheet such as polyimide or mica by coating or printing, those that are made by etching a metal foil into a circuit, or those that are made by putting a metal resistance wire around an insulating substrate sheet. ing.

前記のような発熱素子の両面は、シリコーンゴムシート、ポリイミド樹脂シート、マイカシート等の電気絶縁材により被覆してヒータマットとされ、さらにその外周側に、各種ゴム、各種発泡材、あるいはガラスマット等の断熱材により被覆して面状ヒータとされる。このような面状ヒータとしては、例えば特許文献１〜３に記載されたヒータを挙げることができる。
特開平１０−６４６６７号公報 特開２００２−２９５７８３号公報 特開２００３−６８４３０号公報 Both sides of the heating element as described above are covered with an electrical insulating material such as a silicone rubber sheet, a polyimide resin sheet, a mica sheet, etc. to form a heater mat, and various rubbers, various foam materials, or glass mats are provided on the outer peripheral side thereof. A planar heater is formed by covering with a heat insulating material such as Examples of such a planar heater include the heaters described in Patent Documents 1 to 3.
JP-A-10-64667 JP 2002-295883 A JP 2003-68430 A

発熱素子として金属箔抵抗体あるいは金属線抵抗体等を用い、その両面にガラスクロスを配置し、これらをシリコーンゴム等の電気絶縁ゴムシートで埋設したヒータマットは、１５０℃以上の比較的高い温度で使用でき、優れた耐熱性を有するという特長がある。しかしながら、電気絶縁ゴムシートは重いという欠点があった。そのため、例えば化学工場内の継手、バルブ等の付属品を備えた配管、あるいは曲がりくねった配管が入組んだ狭い空間においては、軽くて配管の取付け、取外しが容易で、作業性が優れている面状ヒータが要求されていた。
従って、本発明が解決しようとする課題は、１５０℃以上の比較的高い温度（１５０℃〜４００℃程度）の領域を含む広い温度領域で使用することが可能で、耐熱性、可撓性が優れ、軽くて作業性も優れた面状ヒータを提供することである。 A heater mat in which a metal foil resistor or a metal wire resistor is used as a heating element, glass cloth is disposed on both sides thereof, and these are embedded with an electrically insulating rubber sheet such as silicone rubber, has a relatively high temperature of 150 ° C. or higher. It has the feature of having excellent heat resistance. However, the electrically insulating rubber sheet has a drawback of being heavy. For this reason, for example, in a small space where pipes with accessories such as joints and valves in a chemical factory or winding pipes are intertwined, they are light, easy to install and remove, and have excellent workability Shaped heaters were required.
Accordingly, the problem to be solved by the present invention is that it can be used in a wide temperature range including a relatively high temperature range of 150 ° C. or higher (about 150 ° C. to 400 ° C.), and has heat resistance and flexibility. An object is to provide a planar heater that is excellent, light and excellent in workability.

本発明者らは、これらの課題を解決すべく鋭意検討した結果、円筒形または曲管形の形状を有する配管を加熱するための面状ヒータにおいて、電気絶縁ゴムシート等の電気絶縁材を用いず、ガラス繊維糸またはガラス繊維布により被覆された金属線抵抗体を用い、これを柔軟性があり網目の粗いガラスクロスに縫糸等により保持し、さらに柔軟性を有し網目の細かいガラスクロス及びスポンジ層で挟持する構成とすることにより、耐熱性、可撓性が優れ、軽くて作業性も優れた面状ヒータが得られることを見出し本発明に到達した。   As a result of intensive studies to solve these problems, the present inventors have used an electrical insulation material such as an electrical insulation rubber sheet in a planar heater for heating a pipe having a cylindrical or curved pipe shape. First, a metal wire resistor coated with glass fiber yarn or glass fiber cloth is used, and this is held by a flexible, coarse mesh glass cloth with sewing threads, etc. It has been found that by adopting a structure sandwiched between sponge layers, it is possible to obtain a planar heater that is excellent in heat resistance and flexibility, is light and has excellent workability, and has reached the present invention.

すなわち本発明は、円筒形または曲管形の形状を有する配管を加熱するための面状ヒータであって、配管と接触する側から外側に向かって、ガラスクロス、ガラス繊維糸またはガラス繊維布により被覆された金属線抵抗体を保持したガラスクロス、及びスポンジ層の順に配置された構成を有し、配管と接触するガラスクロスが、金属線抵抗体を保持したガラスクロスよりも細かい網目を有することを特徴とする面状ヒータである。   That is, the present invention is a planar heater for heating a pipe having a cylindrical or curved pipe shape, and is made of glass cloth, glass fiber yarn or glass fiber cloth from the side in contact with the pipe to the outside. The glass cloth that holds the coated metal wire resistor and the sponge layer are arranged in this order, and the glass cloth that contacts the pipe has a finer mesh than the glass cloth that holds the metal wire resistor. Is a planar heater.

本発明の面状ヒータは、金属線抵抗体がガラス繊維により被覆されているので優れた耐熱性を有している。また、配管と接触するガラスクロスは細かい網目構造を有するので、配管への熱伝導性が優れている。さらに、外側の断熱層はスポンジ層であり、接着剤等の硬化成分を使用することなく、全体にわたり縫糸により固定することができるので、極めて柔軟性があり、重量が軽いという特長を有する。そのため、本発明の面状ヒータは、軽くて作業性に優れ、継手、バルブ等の付属品を備えた配管、あるいは曲がりくねった配管が入組んだ狭い空間においても、配管への取付け、あるいは配管からの取外しを容易に行なうことができる。   The planar heater of the present invention has excellent heat resistance because the metal wire resistor is covered with glass fiber. Moreover, since the glass cloth which contacts piping has a fine network structure, the thermal conductivity to piping is excellent. Further, the outer heat insulating layer is a sponge layer, and can be fixed with a sewing thread throughout without using a curing component such as an adhesive, and thus has an advantage of being extremely flexible and light in weight. Therefore, the planar heater of the present invention is light and excellent in workability, and can be attached to the pipe or from the pipe even in a narrow space where a pipe having accessories such as a joint and a valve, or a winding pipe is complicated. Can be easily removed.

本発明の面状ヒータは、円筒形または曲管形の形状を有する配管を加熱するための電気エネルギーを利用した面状ヒータに適用されるが、特に配管を比較的に高い温度（１５０℃〜４００℃）で効率よく加熱するための面状ヒータに好適に適用される。
以下、本発明の面状ヒータを、図１〜図３に基づいて説明するが、本発明がこれにより限定されるものではない。尚、図１は、本発明の面状ヒータの一例を示す一部切開の斜視図である。図２は、本発明の面状ヒータにおける金属線抵抗体とガラスクロスの配置関係の例を示す斜視図である。また、図３は、本発明の面状ヒータの一例を示す断面図である。 The planar heater of the present invention is applied to a planar heater using electrical energy for heating a pipe having a cylindrical shape or a curved pipe shape. In particular, the pipe is heated to a relatively high temperature (150 ° C. to 150 ° C. (400 ° C.) It is preferably applied to a planar heater for efficient heating.
Hereinafter, although the planar heater of this invention is demonstrated based on FIGS. 1-3, this invention is not limited by this. FIG. 1 is a partially cutaway perspective view showing an example of the planar heater of the present invention. FIG. 2 is a perspective view showing an example of the arrangement relationship between the metal wire resistor and the glass cloth in the planar heater of the present invention. Moreover, FIG. 3 is sectional drawing which shows an example of the planar heater of this invention.

本発明の面状ヒータは、円筒形または曲管形の形状を有する配管を加熱するための面状ヒータであって、図１に示すように、配管と接触する側から外側に向かって、ガラスクロス１、ガラス繊維糸またはガラス繊維布により被覆された金属線抵抗体３を保持したガラスクロス２、及びスポンジ層４の順に配置された構成を有し、配管と接触するガラスクロス１が、金属線抵抗体を保持したガラスクロス２よりも細かい網目を有する面状ヒータである。   The planar heater of the present invention is a planar heater for heating a pipe having a cylindrical shape or a curved pipe shape, and as shown in FIG. A glass cloth 1 having a configuration in which a cloth 1, a glass cloth 2 holding a metal wire resistor 3 covered with a glass fiber yarn or a glass fiber cloth, and a sponge layer 4 are arranged in this order, and the glass cloth 1 in contact with the pipe is a metal This is a planar heater having a finer mesh than the glass cloth 2 holding the wire resistor.

本発明の面状ヒータに用いられる発熱素子としては、ガラス繊維糸またはガラス繊維布に被覆された金属線抵抗体３が用いられる。金属線抵抗体は、比較的に網目が粗いガラスクロス２に所望の配線パターンに固定されるが、その固定方法は特に限定されることはない。固定方法としては、例えば、ガラス繊維等からなるミシン糸を用いてミシン掛けによりガラスクロス２に固定する方法等を挙げることができる。金属線抵抗体とガラスクロスとの配置関係は、通常は、図１、図２に示すように、網目が細かいガラスクロス１が配管と接する層になるようにされ、その外周側に網目が粗いガラスクロス２、さらにその外周側に金属線抵抗体３が配置される。   As the heating element used in the planar heater of the present invention, a metal wire resistor 3 covered with glass fiber yarn or glass fiber cloth is used. The metal wire resistor is fixed to a desired wiring pattern on the glass cloth 2 having a relatively coarse mesh, but the fixing method is not particularly limited. Examples of the fixing method include a method of fixing to the glass cloth 2 by sewing using a sewing thread made of glass fiber or the like. As shown in FIGS. 1 and 2, the arrangement relationship between the metal wire resistor and the glass cloth is normally such that the glass cloth 1 having a fine mesh is in a layer in contact with the pipe, and the mesh is coarse on the outer peripheral side thereof. A glass cloth 2 and a metal wire resistor 3 are arranged on the outer peripheral side thereof.

尚、図１、図２に示すガラスクロス１は１枚であるが、本発明の面状ヒータにおいては、これと同種類または別種類のガラスクロスをさらに1枚または２枚以上配置することができる。また、金属線抵抗体を保持するガラスクロスは、通常は網目が粗く通気性であり、配管と接するガラスクロスは、通常は網目が細かく非通気性とすることもできる。ガラスクロス１の厚みは、通常は０．０１〜１．０ｍｍ、好ましくは０．０２〜０．５ｍｍであり、ガラスクロス２の厚みは、通常は０．１〜３．０ｍｍ、好ましくは０．２〜２．０ｍｍである。厚みが下限未満の場合は強度が弱く、上限を超えると可撓性、柔軟性が失われる虞が生じる。   In addition, although the glass cloth 1 shown in FIG. 1 and FIG. 2 is one sheet, in the planar heater of the present invention, one or more glass cloths of the same kind or different kinds may be arranged. it can. Further, the glass cloth holding the metal wire resistor is usually coarse in mesh and air permeable, and the glass cloth in contact with the pipe is usually fine in mesh and can be made non-breathable. The thickness of the glass cloth 1 is usually 0.01 to 1.0 mm, preferably 0.02 to 0.5 mm, and the thickness of the glass cloth 2 is usually 0.1 to 3.0 mm, preferably 0. 2 to 2.0 mm. When the thickness is less than the lower limit, the strength is weak, and when it exceeds the upper limit, flexibility and softness may be lost.

本発明の面状ヒータに用いられるスポンジ層４の構成材料としては、ガラス繊維ウール及び／または弾性発泡樹脂を用いることができる。しかし、配管側から外側に向かって、ガラス繊維ウール層、弾性発泡樹脂層の二層構造とすることが好ましい。弾性発泡樹脂としては、メラミン樹脂、ウレタン樹脂、ポリエチレン樹脂、ポリエステル樹脂、ポリスチレン樹脂シリコーン樹脂、フェノール樹脂等の発泡樹脂を挙げることができるが、適度な可撓性、柔軟性があり、優れた断熱性、軽量性を有することから、メラミン樹脂またはシリコーン樹脂を使用することが好ましい。スポンジ層４の厚みは、通常は２〜１００ｍｍ、好ましくは５〜５０ｍｍである。また、密度は通常は０．００５〜０．２ｇ／ｃｍ３、好ましくは０．００８〜０．０５ｇ／ｃｍ３である。 As a constituent material of the sponge layer 4 used in the planar heater of the present invention, glass fiber wool and / or elastic foamed resin can be used. However, a two-layer structure of a glass fiber wool layer and an elastic foamed resin layer is preferable from the pipe side toward the outside. Examples of the elastic foamed resin include foamed resins such as melamine resin, urethane resin, polyethylene resin, polyester resin, polystyrene resin silicone resin, phenol resin, etc., but there is moderate flexibility and flexibility, and excellent heat insulation. It is preferable to use a melamine resin or a silicone resin because of its property and lightness. The thickness of the sponge layer 4 is usually 2 to 100 mm, preferably 5 to 50 mm. The density is usually 0.005 to 0.2 g / cm 3 , preferably 0.008 to 0.05 g / cm 3 .

本発明の面状ヒータは、例えば図２に示すように、金属線抵抗体が上になるように複数枚のガラスクロスを重ね合せ、さらに金属線抵抗体の上にスポンジ層を重ね合せた後、これらを円筒形となるように結合し固定することにより製作される。結合方法としては、ガラス繊維等の耐熱性糸からなる縫糸を用いて各層を縫い合せ固定する方法が好ましい。本発明の面状ヒータには、さらに図３に示すように、電極５及び電気コード６が取付けられる。また、必要に応じて外側表面に、バンド７及び止め具８を取付けて、面状ヒータの端部が互いに結合できるようにすることもできる。   For example, as shown in FIG. 2, the planar heater of the present invention is formed by superposing a plurality of glass cloths so that the metal wire resistor is on top, and further superposing a sponge layer on the metal wire resistor. These are manufactured by connecting and fixing them in a cylindrical shape. As a bonding method, a method in which each layer is sewn and fixed using a sewing thread made of heat-resistant thread such as glass fiber is preferable. As shown in FIG. 3, an electrode 5 and an electric cord 6 are attached to the planar heater of the present invention. Further, if necessary, the band 7 and the stopper 8 can be attached to the outer surface so that the ends of the planar heater can be coupled to each other.

次に、本発明を実施例により具体的に説明するが、本発明がこれらにより限定されるものではない。   EXAMPLES Next, although an Example demonstrates this invention concretely, this invention is not limited by these.

［実施例１］
（面状ヒータの製作）
網目が粗いガラスクロス（網目：２ｍｍ×２ｍｍ、厚み：０．８ｍｍ）の表面に、ガラス繊維糸により被覆された金属線抵抗体を、ガラス繊維からなるミシン糸を用いてミシン掛けすることにより、図２に示すように蛇行状に縫付けて固定した。次に、非通気性のガラスクロス（厚み：０．２５ｍｍ）の上に前記の金属線抵抗体を保持したガラスクロスを積層し、さらにその上にガラス繊維ウール（厚み：１０ｍｍ）、メラミン発泡樹脂（厚み：１０ｍｍ）をこの順で積層した。 [Example 1]
(Manufacture of planar heaters)
By applying a metal wire resistor coated with glass fiber yarn on the surface of a glass cloth having a coarse mesh (mesh: 2 mm × 2 mm, thickness: 0.8 mm) using a sewing thread made of glass fiber, As shown in FIG. 2, it was fixed in a meandering manner. Next, a glass cloth holding the metal wire resistor is laminated on a non-breathable glass cloth (thickness: 0.25 mm), and further glass fiber wool (thickness: 10 mm) and melamine foam resin on the glass cloth. (Thickness: 10 mm) were laminated in this order.

前記の積層体を治具により円筒形に変形し、ガラス繊維糸を用いて各層を周辺部において縫い合せ、結合させて固定するとともに、円筒形に設けた一部の切欠部に電極を挿入し、電気コードを取付けて配線した。また、外側表面にバンド及び止め具を取付けて、図３に示すような面状ヒータ（内径：６０ｍｍ、長さ：３００ｍｍ）を得た。尚、この面状ヒータのスポンジ層の密度は、０．０１ｇ／ｃｍ３であった。得られた面状ヒータは、内部にも塊のような感触がなく、全体としてスポンジのように軽く優れた柔軟性があった。 The laminate is deformed into a cylindrical shape using a jig, and the layers are sewn and bonded together at the periphery using glass fiber threads, and electrodes are inserted into some notches provided in the cylindrical shape. The electric cord was attached and wired. A band and a stopper were attached to the outer surface to obtain a planar heater (inner diameter: 60 mm, length: 300 mm) as shown in FIG. The density of the sponge layer of this planar heater was 0.01 g / cm 3 . The obtained planar heater did not feel like a lump inside, and was light and excellently flexible like a sponge as a whole.

（面状ヒータの評価）
以上のようにして得られた面状ヒータを、ステンレス製の円筒管（長さ：３００ｍｍ、外径：６０ｍｍ、厚み：３ｍｍ）の周囲に取付け、室温２０℃の試験室において、１００Ｖの交流電圧を通電し、円筒管の内側中央部の表面温度が２２０℃となるように温度調節しながら５０時間通電した。この間、面状ヒータは、強度不足等の不具合を発生することなく、効率よく均一にステンレス製の円筒管を加熱することができた。 (Evaluation of sheet heater)
The planar heater obtained as described above is mounted around a stainless steel cylindrical tube (length: 300 mm, outer diameter: 60 mm, thickness: 3 mm), and an AC voltage of 100 V is used in a test room at room temperature of 20 ° C. Was energized for 50 hours while adjusting the temperature so that the surface temperature of the inner central portion of the cylindrical tube was 220 ° C. During this time, the planar heater was able to efficiently and uniformly heat the stainless steel cylindrical tube without causing problems such as insufficient strength.

［実施例２］
（面状ヒータの製作）
網目が粗いガラスクロス（網目：２ｍｍ×２ｍｍ、厚み：０．８ｍｍ）の表面に、ガラス繊維布により被覆された金属線抵抗体を、ガラス繊維からなるミシン糸を用いてミシン掛けすることにより、図２に示すように蛇行状に縫付けて固定した。次に、２枚の非通気性のガラスクロス（厚み：各々０．２５ｍｍ）の上に前記の金属線抵抗体を保持したガラスクロスを積層し、さらにその上にシリコーン発泡樹脂（厚み：１５ｍｍ）をこの順で積層した。 [Example 2]
(Manufacture of planar heaters)
By applying a metal wire resistor coated with a glass fiber cloth on the surface of a glass cloth having a coarse mesh (mesh: 2 mm × 2 mm, thickness: 0.8 mm) using a sewing thread made of glass fiber, As shown in FIG. 2, it was fixed in a meandering manner. Next, a glass cloth holding the metal wire resistor is laminated on two non-breathable glass cloths (thickness: 0.25 mm each), and a silicone foam resin (thickness: 15 mm) is further formed thereon. Were laminated in this order.

前記の積層体を治具により円筒形に変形し、ガラス繊維糸を用いて各層を周辺部において縫い合せ、結合させて固定するとともに、円筒形に設けた一部の切欠部に電極を挿入し、電気コードを取付けて配線した。また、外側表面にバンド及び止め具を取付けて、図３に示すような面状ヒータ（内径：６０ｍｍ、長さ：３００ｍｍ）を得た。尚、この面状ヒータのスポンジ層の密度は、０．０１２ｇ／ｃｍ３であった。得られた面状ヒータは、内部にも塊のような感触がなく、全体としてスポンジのように軽く優れた柔軟性があった。 The laminate is deformed into a cylindrical shape using a jig, and the layers are sewn and bonded together at the periphery using glass fiber threads, and electrodes are inserted into some notches provided in the cylindrical shape. The electric cord was attached and wired. A band and a stopper were attached to the outer surface to obtain a planar heater (inner diameter: 60 mm, length: 300 mm) as shown in FIG. The density of the sponge layer of this planar heater was 0.012 g / cm 3 . The obtained planar heater did not feel like a lump inside, and was light and excellently flexible like a sponge as a whole.

（面状ヒータの評価）
以上のようにして得られた面状ヒータを、ステンレス製の円筒管（長さ：３００ｍｍ、外径：６０ｍｍ、厚み：３ｍｍ）の周囲に取付け、室温２０℃の試験室において、１００Ｖの交流電圧を通電し、円筒管の内側中央部の表面温度が１８０℃となるように温度調節しながら５０時間通電した。この間、面状ヒータは、強度不足等の不具合を発生することなく、効率よく均一にステンレス製の円筒管を加熱することができた。 (Evaluation of sheet heater)
The planar heater obtained as described above is mounted around a stainless steel cylindrical tube (length: 300 mm, outer diameter: 60 mm, thickness: 3 mm), and an AC voltage of 100 V is used in a test room at room temperature of 20 ° C. Was energized for 50 hours while adjusting the temperature so that the surface temperature of the inner central portion of the cylindrical tube was 180 ° C. During this time, the planar heater was able to efficiently and uniformly heat the stainless steel cylindrical tube without causing problems such as insufficient strength.

以上のように、本発明の面状ヒータは、軽くて作業性に優れ、継手、バルブ等の付属品を備えた配管、あるいは曲がりくねった配管が入組んだ狭い空間においても、配管への取付け、あるいは配管からの取外しを容易に行なうことができる。   As described above, the planar heater of the present invention is light and excellent in workability, and can be attached to a pipe even in a narrow space where a pipe having accessories such as a joint and a valve or a winding pipe is complicated, Or removal from piping can be performed easily.

本発明の面状ヒータの一例を示す一部切開の斜視図The perspective view of partial incision which shows an example of the planar heater of this invention 本発明の面状ヒータにおける金属線抵抗体とガラスクロスの配置関係の例を示す斜視図The perspective view which shows the example of the arrangement | positioning relationship of the metal wire resistor and glass cloth in the planar heater of this invention 本発明の面状ヒータの一例を示す断面図Sectional drawing which shows an example of the planar heater of this invention

１ ガラスクロス
２ 金属線抵抗体を保持したガラスクロス
３ 金属線抵抗体
４ スポンジ層
５ 電極
６ 電気コード
７ バンド
８ 止め具 DESCRIPTION OF SYMBOLS 1 Glass cloth 2 Glass cloth holding metal wire resistor 3 Metal wire resistor 4 Sponge layer 5 Electrode 6 Electric cord 7 Band 8 Stopper

Claims (5)

円筒形または曲管形の形状を有する配管を加熱するための面状ヒータであって、配管と接触する側から外側に向かって、ガラスクロス、ガラス繊維糸またはガラス繊維布により被覆された金属線抵抗体を保持したガラスクロス、及びスポンジ層の順に配置された構成を有し、配管と接触するガラスクロスが、金属線抵抗体を保持したガラスクロスよりも細かい網目を有することを特徴とする面状ヒータ。   A planar heater for heating a pipe having a cylindrical shape or a curved pipe shape, which is coated with glass cloth, glass fiber yarn or glass fiber cloth from the side in contact with the pipe to the outside. A surface having a structure in which a glass cloth holding a resistor and a sponge layer are arranged in this order, and the glass cloth contacting the pipe has a finer mesh than the glass cloth holding the metal wire resistor Heater. ガラス繊維糸またはガラス繊維布により被覆された金属線抵抗体が、縫糸によりガラスクロスに保持された請求項１に記載の面状ヒータ。   The planar heater according to claim 1, wherein the metal wire resistor covered with the glass fiber yarn or the glass fiber cloth is held on the glass cloth by the sewing thread. ガラスクロスからスポンジ層までの各層が、縫糸により結合された請求項１に記載の面状ヒータ。   The planar heater according to claim 1, wherein each layer from the glass cloth to the sponge layer is bonded by a sewing thread. スポンジ層は、配管側から外側に向かって、ガラス繊維ウール層及び弾性発泡樹脂層からなる請求項１に記載の面状ヒータ。   The planar heater according to claim 1, wherein the sponge layer is composed of a glass fiber wool layer and an elastic foamed resin layer from the pipe side toward the outside. 弾性発泡樹脂が、メラミン発泡樹脂またはシリコーン発泡樹脂である請求項４に記載の面状ヒータ。   The planar heater according to claim 4, wherein the elastic foam resin is a melamine foam resin or a silicone foam resin.
JP2010291444A 2010-12-28 2010-12-28 Sheet heater Expired - Fee Related JP5529002B2 (en)

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