JP3988749B2 - Electric heater - Google Patents

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JP3988749B2
JP3988749B2 JP2004193538A JP2004193538A JP3988749B2 JP 3988749 B2 JP3988749 B2 JP 3988749B2 JP 2004193538 A JP2004193538 A JP 2004193538A JP 2004193538 A JP2004193538 A JP 2004193538A JP 3988749 B2 JP3988749 B2 JP 3988749B2
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heating element
holding
insulating
electrode plate
electric heater
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JP2005108809A (en
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康裕 大矢
淳二 森脇
喜則 秋山
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Denso Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F24H9/1872—PTC

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  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Description

本発明は、正特性のサーミスタ等を発熱素子として採用する電気式ヒータに関する。   The present invention relates to an electric heater that employs a positive temperature coefficient thermistor or the like as a heating element.

図２３に示すごとく、略平行に配置された一対の第１及び第２取付フレーム９１、９２と、該第１及び第２取付フレーム９１、９２と直行し、かつ第１及び第２取付フレーム９１、９２の両端にそれぞれ配置した側面取付フレーム９３、９４とによって保持され、上記第１及び第２及び側面取付フレーム９１〜９４によって形成された平面内に発熱体９５を配置した電気式ヒータ９が知られている。
上記発熱体９５は、相互に略平行に放熱フィン９５１、発熱要素９５２、該発熱要素９５２に電力を印加する電極板９５３を積層してなる。第１及び第２取付フレーム９１、９２は発熱体９５の積層方向と略直行し、側面取付フレーム９３、９４は積層方向と略平行する。
上記電気式ヒータ９において、第１取付フレーム９１と発熱体９５の上側の端面との間、第２取付フレーム９２と発熱体９５の下側の端面との間には、それぞれ発熱体９５の積層方向、外部から内部に向かう弾性力（復元力）を発揮するばね材９１０、９２０を配置する。 As shown in FIG. 23, a pair of first and second mounting frames 91 and 92 arranged substantially in parallel, and perpendicular to the first and second mounting frames 91 and 92 and the first and second mounting frames 91. , 92 are respectively held by side mounting frames 93, 94, and an electric heater 9 having a heating element 95 arranged in a plane formed by the first and second and side mounting frames 91-94 is provided. Are known.
The heating element 95 is formed by stacking heat radiation fins 951, heating elements 952, and electrode plates 953 for applying electric power to the heating elements 952 substantially parallel to each other. The first and second mounting frames 91 and 92 are substantially perpendicular to the stacking direction of the heating elements 95, and the side mounting frames 93 and 94 are approximately parallel to the stacking direction.
In the electric heater 9, the heating element 95 is laminated between the first mounting frame 91 and the upper end face of the heating element 95 and between the second mounting frame 92 and the lower end face of the heating element 95. Spring members 910 and 920 that exhibit an elastic force (restoring force) from the outside to the inside are arranged.

電気式ヒータ９において、電極板９５３から発熱要素９５２に電力が印加されて、発熱要素９５２が発熱する。発熱要素９５２で発生した熱は電極板９５３を介して放熱フィン９５１に熱伝導し、放熱フィン９５１から該放熱フィン９５１近傍を通過する被加熱媒体に熱伝導が生じることで、電気式ヒータ９が機能する。
以下の特許文献１はラジエータに関する発明であるが、図２３と同様の構成とばね材による効果を備えている。 In the electric heater 9, electric power is applied from the electrode plate 953 to the heat generating element 952, and the heat generating element 952 generates heat. The heat generated in the heat generating element 952 is thermally conducted to the heat radiating fins 951 through the electrode plate 953, and heat conduction is generated from the heat radiating fins 951 to the heated medium passing through the vicinity of the heat radiating fins 951. Function.
The following Patent Document 1 is an invention related to a radiator, but has the same configuration as that of FIG. 23 and the effect of a spring material.

特許第３２７４２３４号公報Japanese Patent No. 3274234

ところで、発熱要素への電力供給は電極板を介して行うため、図２３にかかる電気式ヒータ９では、電極板９５３の端部と電気的に導通した突出部９５４を設けてあり、ここを通じて外部から電力を印加する。従って、上記突出部９５４に関して、他の部材との間で絶縁が保持されるような構成を付加する必要があった。   By the way, since the electric power is supplied to the heat generating element through the electrode plate, the electric heater 9 according to FIG. 23 is provided with a protruding portion 954 that is electrically connected to the end portion of the electrode plate 953, through which an external portion is provided. Apply power from. Therefore, it has been necessary to add a configuration in which the protrusion 954 is insulated from other members.

本発明は、かかる従来の問題点に鑑みてなされたもので、電極板が発熱体側面において充分に絶縁された電気式ヒータを提供しようとするものである。   The present invention has been made in view of such conventional problems, and an object of the present invention is to provide an electric heater in which an electrode plate is sufficiently insulated on the side of a heating element.

第１の発明は、放熱フィン、通電により発熱する発熱素子と該発熱素子を保持する絶縁性発熱素子保持具、上記発熱素子に電力を印加する電極板を積層して構成した発熱体を有し、被加熱媒体が上記放熱フィンの近傍を通過する電気式ヒータであって、
該電気式ヒータは、上記発熱体の積層方向両端面に第１及び第２保持フレームを有すると共に、上記発熱体の両側面にそれぞれ側部フレームを有しており、
上記電極板は、上記発熱体の側面から突出した接続端子を有しており、
上記絶縁性発熱素子保持具は、上記発熱素子を保持する素子保持部と、上記接続端子を保持する端子保持部とを有し、かつ上記端子保持部は、発熱体の積層方向に突出した一対の絶縁壁部と一対の絶縁壁部間を橋渡しする板部とからなる絶縁保持溝を有しており、
上記絶縁保持溝において、上記接続端子は一対の絶縁壁部の内側に挟持されると共に、上記側部フレームは、一対の絶縁壁部の外側から上記端子保持部を挟持してなり、上記絶縁壁部が上記接続端子と上記側部フレームとの間にあって両者を絶縁することを特徴とする電気式ヒータにある（請求項１）。 1st invention has a heat generating element comprised by laminating | stacking the heat-radiating fin, the heat generating element which heat-generates by electricity supply, the insulating heat generating element holder which hold | maintains this heat generating element, and the electrode plate which applies electric power to the said heat generating element. An electric heater in which a medium to be heated passes near the heat dissipating fins,
The electric heater has first and second holding frames on both end surfaces of the heating element in the stacking direction, and side frames on both side faces of the heating element,
The electrode plate has a connection terminal protruding from the side surface of the heating element,
The insulating heating element holder has an element holding part for holding the heating element and a terminal holding part for holding the connection terminal, and the terminal holding part is a pair protruding in the stacking direction of the heating elements. Having an insulating holding groove composed of an insulating wall portion and a plate portion that bridges between the pair of insulating wall portions,
In the insulating holding groove, the connection terminal is held inside the pair of insulating walls, and the side frame holds the terminal holding part from the outside of the pair of insulating walls. The electric heater is characterized in that the portion is between the connection terminal and the side frame and insulates the two (claim 1).

本発明にかかる電気式ヒータは、端子保持部の絶縁保持溝における一対の絶縁壁部の内側に電極板の接続端子を保持し、また一対の絶縁壁部の外側から側部フレームが上記端子保持部を挟持するよう構成する。
これにより、側部フレームを導電性のある材料を用いて構成した場合でも、絶縁壁部が接続端子と側部フレームとの間に位置して両者を絶縁するため、発熱体側面において、電極板に関して充分な絶縁状態を確保することができる。 The electric heater according to the present invention holds the connection terminal of the electrode plate inside the pair of insulating walls in the insulating holding groove of the terminal holding part, and the side frame holds the terminal from the outside of the pair of insulating walls. The part is configured to be sandwiched.
As a result, even when the side frame is made of a conductive material, the insulating wall is positioned between the connection terminal and the side frame to insulate the electrode plate on the side of the heating element. A sufficient insulation state can be secured.

以上、本発明によれば、電極板が発熱体側面において充分に絶縁された電気式ヒータを提供することができる。   As described above, according to the present invention, it is possible to provide an electric heater in which the electrode plate is sufficiently insulated on the side surface of the heating element.

第２の発明は、放熱フィン、通電により発熱する発熱素子と該発熱素子を保持する絶縁性発熱素子保持具、上記発熱素子に電力を印加する電極板を積層して構成した発熱体を有し、被加熱媒体が上記放熱フィンの近傍を通過する電気式ヒータであって、
該電気式ヒータは、上記発熱体の積層方向両端面に第１及び第２保持フレームを有すると共に、上記発熱体の両側面にそれぞれ側部フレームを有しており、
上記絶縁性発熱素子保持具は、上記積層方向における表面に、上記電極板を配置するための保持溝を有していると共に、上記側部フレームと対向する側面に、該側部フレームを挿入配置するための保持凹部を有しており、
上記電極板は、上記絶縁性発熱素子保持具の正面方向に突出してなる接続端子を有しており、
上記電極板と上記側部フレームとは、上記絶縁性発熱素子保持具によって絶縁されていることを特徴とする電気式ヒータにある（請求項３）。 The second invention has a heat-radiating fin, a heat generating element that generates heat when energized, an insulating heat generating element holder that holds the heat generating element, and a heating element configured by laminating an electrode plate that applies power to the heat generating element. An electric heater in which a medium to be heated passes near the heat dissipating fins,
The electric heater has first and second holding frames on both end surfaces of the heating element in the stacking direction, and side frames on both side faces of the heating element,
The insulating heating element holder has a holding groove for arranging the electrode plate on the surface in the stacking direction, and the side frame is inserted and arranged on a side surface facing the side frame. Has a holding recess for
The electrode plate has a connection terminal protruding in the front direction of the insulating heating element holder,
In the electric heater, the electrode plate and the side frame are insulated by the insulating heating element holder.

本発明においては、上記絶縁性発熱素子保持具は、上記保持溝及び保持凹部を有している。そして、保持溝は電極板を保持することができ、保持凹部は側部フレームを保持することができる。
これにより、側部フレームを導電性のある材料を用いて構成した場合でも、絶縁性発熱素子保持具の一部が電極板と側部フレームとの間に位置して両者を絶縁するため、電極板に関して充分な絶縁状態を確保することができる。
なお、正面方向とは、側方（横方向）及び積層方向と直交する方向のことをいう。
また、本発明の電気式ヒータにおいては、電極板の接続端子を正面方向に取り出しており、発熱体の側方（横方向）にスペースの制約がある場合でも、適切に接続端子を取り出すことができる。 In the present invention, the insulating heating element holder has the holding groove and the holding recess. The holding groove can hold the electrode plate, and the holding recess can hold the side frame.
As a result, even when the side frame is configured using a conductive material, a part of the insulating heating element holder is located between the electrode plate and the side frame and insulates the electrodes. A sufficient insulation state can be secured for the plate.
The front direction means a direction (lateral direction) and a direction orthogonal to the stacking direction.
Further, in the electric heater of the present invention, the connection terminal of the electrode plate is taken out in the front direction, and the connection terminal can be taken out properly even when there is a space limitation on the side (lateral direction) of the heating element. it can.

以上、本発明によれば、電極板が充分に絶縁された電気式ヒータを提供することができる。   As described above, according to the present invention, an electric heater in which an electrode plate is sufficiently insulated can be provided.

本発明の電気式ヒータは、発熱素子として、ＰＴＣ（Positive Temperature Coefficient）素子を用いることができる。ＰＴＣ素子は、特定の温度以上で急速に電気抵抗が増大する性質をもった素子で、そのため通電により発熱するが、発熱する温度が所定の温度を越えると電気抵抗が高くなりすぎて電流が殆ど流れなくなり、ある程度の温度以上に発熱することがない。よって、この素子を用いることにより、ヒータを効果的に発熱させることができると共に、ヒータの過熱を防ぐことができる。   The electric heater of the present invention can use a PTC (Positive Temperature Coefficient) element as a heating element. A PTC element has a property that electrical resistance rapidly increases above a specific temperature. Therefore, it generates heat when energized. However, when the temperature at which heat is generated exceeds a predetermined temperature, the electrical resistance becomes too high and almost no current is generated. It will not flow and will not generate heat above a certain temperature. Therefore, by using this element, the heater can be effectively heated and overheating of the heater can be prevented.

本発明にかかる絶縁性発熱素子保持具は、例えばナイロン、ＰＰＳ樹脂からなることが好ましい。
本発明にかかる側部フレームや端子保持部の具体的な形状について説明すると、例えば後述する図４に示すごとく、側部フレームは本体部が環状に構成され、該本体部に上記端子保持部を差し込んで、端子保持部における絶縁壁部の外側と本体部の内周面とが接触すると共に、本体部を端子保持部に対し固定することができる。端子保持部は発熱体の側面から突出しているため、端子保持部において側部フレームを固定することで、側部フレームを発熱体の側面に固定することができる。 The insulating heating element holder according to the present invention is preferably made of, for example, nylon or PPS resin.
The specific shapes of the side frame and terminal holding portion according to the present invention will be described. For example, as shown in FIG. 4 to be described later, the side frame has a body portion configured in an annular shape, and the terminal holding portion is provided on the body portion. By inserting, the outside of the insulating wall portion in the terminal holding portion and the inner peripheral surface of the main body portion come into contact with each other, and the main body portion can be fixed to the terminal holding portion. Since the terminal holding portion protrudes from the side surface of the heating element, the side frame can be fixed to the side surface of the heating element by fixing the side frame at the terminal holding portion.

また、側部フレームを金属製のバネ材から構成することで、発熱体に積層方向に力を与えて、発熱体の積層方向一体化を図ることができる。
このように側部フレームが金属製である場合、側部フレームと電極板との間で確実に絶縁を取る必要がある。その場合、本発明にかかる構成は、側部フレームと電極板との絶縁を容易に確保することができるため、望ましい。
また、側部フレームで発熱体の積層方向一体化を実現することで、発熱体に積層方向の力を加える部材として、側部フレーム以外の別部材を設ける必要がなくなり、部品点数を減らし、組み立て工数を減らすことができるため好ましい。
また、端子保持部の絶縁壁部は、電極板の厚みより高いことが好ましい。これにより、端子保持部に接続端子を配置した際に、積層方向に接続端子が露出することを防いで、絶縁性をより確かにすることができる。 Further, by forming the side frame from a metal spring material, it is possible to apply force to the heating elements in the stacking direction and to integrate the heating elements in the stacking direction.
Thus, when the side frame is made of metal, it is necessary to ensure insulation between the side frame and the electrode plate. In that case, the configuration according to the present invention is desirable because the insulation between the side frame and the electrode plate can be easily secured.
In addition, by integrating the heating elements in the stacking direction in the side frame, it is not necessary to provide a separate member other than the side frame as a member that applies force in the stacking direction to the heating element, reducing the number of parts and assembling. This is preferable because the number of steps can be reduced.
Moreover, it is preferable that the insulating wall part of a terminal holding part is higher than the thickness of an electrode plate. Thereby, when a connection terminal is arrange | positioned at a terminal holding | maintenance part, it can prevent that a connection terminal is exposed to a lamination direction, and can make insulation more reliable.

また、上記絶縁性発熱素子保持具の素子保持部は、上記発熱体の積層方向に突出した一対の壁部と該一対の壁部間を橋渡しする板部とからなり、上記絶縁性発熱素子保持具と積層方向に隣接する上記放熱フィン又は上記電極板の少なくとも一方を保持する保持溝を有することが好ましい（請求項２）。
これにより、放熱フィン及び電極板の積層ずれを防止することができる。
また、絶縁性発熱素子保持具に設けた保持溝においては、放熱フィンと共に電極板を保持することができる。また、保持溝は積層方向の両端に向かって開口するように絶縁性発熱素子保持具に設けることができる。具体的には、絶縁性発熱素子保持具の断面形状がＨ型（後述する図７、図８参照）となるように構成することができる。一方の保持溝で放熱フィンを保持し、他方の保持溝で電極板及び放熱フィンを保持することができる。 In addition, the element holding portion of the insulating heating element holder includes a pair of wall portions protruding in the stacking direction of the heating elements and a plate portion that bridges the pair of wall portions, and holds the insulating heating element holding portion. It is preferable to have a holding groove for holding at least one of the radiating fin or the electrode plate adjacent to the tool in the stacking direction (Claim 2).
Thereby, the lamination | stacking shift | offset | difference of a radiation fin and an electrode plate can be prevented.
Further, in the holding groove provided in the insulating heating element holder, the electrode plate can be held together with the heat radiating fins. The holding groove can be provided in the insulating heating element holder so as to open toward both ends in the stacking direction. Specifically, the insulating heating element holder can be configured to have an H-shaped cross section (see FIGS. 7 and 8 to be described later). The radiation fin can be held in one holding groove, and the electrode plate and the radiation fin can be held in the other holding groove.

（実施例１）
本例の電気式ヒータ１は、図１〜図３に示すごとく、放熱フィン３２、通電により発熱する発熱素子３３０と該発熱素子３３０を保持する絶縁性発熱素子保持具５（以下、保持具５と略する）、上記発熱素子３３０に電力を印加（供給）する電極板３１、第１及び第２絶縁体４１、４２を積層して構成した発熱体３を有し、該発熱体３の積層方向両端面３０１、３０２と該両端面３０１、３０２と交差する両側面３０３、３０４とによって張られた一方の面３０５から他方の面３０６に向かって被加熱媒体が上記放熱フィン３２の近傍を通過する。
上記発熱体３の積層方向両端面３０１、３０２には第１及び第２保持フレーム２１、２２を設け、上記発熱体３の両側面３０３、３０４には側部フレーム１を設ける。 Example 1
As shown in FIGS. 1 to 3, the electric heater 1 of this example includes a heat radiating fin 32, a heat generating element 330 that generates heat when energized, and an insulating heat generating element holder 5 that holds the heat generating element 330 (hereinafter referred to as a holder 5). A heating element 3 configured by stacking an electrode plate 31 for applying (supplying) electric power to the heating element 330, and first and second insulators 41 and 42, and stacking the heating elements 3 The heated medium passes through the vicinity of the radiation fin 32 from one surface 305 stretched by both end surfaces 301, 302 in the direction and both side surfaces 303, 304 intersecting the both end surfaces 301, 302 toward the other surface 306. To do.
First and second holding frames 21 and 22 are provided on both end surfaces 301 and 302 in the stacking direction of the heating element 3, and side frames 1 are provided on both side surfaces 303 and 304 of the heating element 3.

上記電極板３１は、上記発熱体３の側面３０４から突出し、図示を略した外部電源と電気的に接続可能な接続端子３１１を有する。
図５〜図１４に示すごとく、上記保持具５は、上記発熱素子３３０を保持する素子保持部５１と、上記接続端子３１１を保持する端子保持部５２とを有し、かつ上記端子保持部５２は、発熱体３の積層方向（図７や図８等は図面における上下方向に一致）に突出した一対の絶縁壁部５２１と一対の絶縁壁部５２１間を橋渡しする板部５２０とからなる絶縁保持溝５２６を有する。
上記絶縁保持溝５２６において、上記接続端子３１１は一対の絶縁壁部５２１の内側に挟持されると共に、上記側部フレーム１は、一対の絶縁壁部５２１の外側から上記端子保持部５２を挟持してなり、上記絶縁壁部５２１が上記接続端子３１１と上記側部フレーム１との間にあって両者を絶縁する。 The electrode plate 31 has a connection terminal 311 that protrudes from the side surface 304 of the heating element 3 and can be electrically connected to an external power source (not shown).
As shown in FIGS. 5 to 14, the holder 5 includes an element holding portion 51 that holds the heating element 330 and a terminal holding portion 52 that holds the connection terminal 311, and the terminal holding portion 52. Is an insulation composed of a pair of insulating wall portions 521 protruding in the stacking direction of the heating elements 3 (FIG. 7 and FIG. 8 and the like coincide with the vertical direction in the drawings) and a plate portion 520 that bridges between the pair of insulating wall portions 521. A holding groove 526 is provided.
In the insulating holding groove 526, the connection terminal 311 is held inside the pair of insulating wall portions 521, and the side frame 1 holds the terminal holding portion 52 from the outside of the pair of insulating wall portions 521. The insulating wall 521 is located between the connection terminal 311 and the side frame 1 to insulate them.

以下、詳細に説明する。
図１に示すごとく、本例の電気式ヒータ２は、発熱素子３３０の熱が放熱フィン３２に伝導し、被加熱媒体（例えば空気等）が発熱体３の面３０５から面３０６に向かって通過する際に放熱フィン３２から熱を受け取り、被加熱媒体の温度が上昇する。 Details will be described below.
As shown in FIG. 1, in the electric heater 2 of this example, the heat of the heating element 330 is conducted to the radiation fin 32, and the medium to be heated (for example, air) passes from the surface 305 of the heating element 3 toward the surface 306. In doing so, heat is received from the radiation fins 32, and the temperature of the medium to be heated rises.

本例の発熱体３は、図１、図２、図３に示すごとく、電極板３１、放熱フィン３２及び保持具３３を順次複数積層してなる。より具体的には、発熱体３は、第１絶縁体４１、電極板３１、放熱フィン３２、発熱素子３３０を保持した保持具５、電極板３１、放熱フィン３２・・・放熱フィン３２、第２絶縁体４２の順に積層してなる。また、発熱体３は、５枚の電極板３１、５個の放熱フィン３２、４個の発熱素子３３０を保持する４個の保持具３３からなる。また、各保持具５は、積層方向上側において放熱フィン３２を保持し、積層方向下側において電極板３１及び放熱フィン３２を保持する。   As shown in FIGS. 1, 2, and 3, the heating element 3 of this example is formed by sequentially laminating a plurality of electrode plates 31, radiation fins 32, and holders 33. More specifically, the heating element 3 includes the first insulator 41, the electrode plate 31, the radiation fin 32, the holder 5 holding the heating element 330, the electrode plate 31, the radiation fin 32. Two insulators 42 are stacked in this order. The heating element 3 includes five electrode plates 31, five radiation fins 32, and four holders 33 that hold four heating elements 330. Each holder 5 holds the radiation fin 32 on the upper side in the stacking direction, and holds the electrode plate 31 and the heat dissipation fin 32 on the lower side in the stacking direction.

また、発熱体３の左右の側面３０３、３０４に側部フレーム１を配置し、該側部フレーム１の外方からケース２３、２４を配置する。
なお、図３は、側面３０４から突出する端子保持部５２や接続端子３１１等の記載を省略し、発熱体３における各部品の積層状態のみを示した概略図である。 Further, the side frame 1 is disposed on the left and right side surfaces 303 and 304 of the heating element 3, and the cases 23 and 24 are disposed from the outside of the side frame 1.
FIG. 3 is a schematic view showing only the stacked state of each component in the heating element 3, omitting the description of the terminal holding portion 52 and the connection terminal 311 protruding from the side surface 304.

放熱フィン３２は、図１、図２に示すごとく、２個のＬ字型枠３２１、３２２と薄い波型板３２０とからなり、２個のＬ字型枠３２１、３２２で囲まれた方形の空間に上記波型板３２０を収納してなる。Ｌ字型枠３２１、３２２と波型板３２０はロウ付けで一体化する。ここでＬ字型枠３２１、３２２及び波型板３２０はそれぞれ共にアルミニウムよりなる。
また、電極板３１は、長細い平型金属板で黄銅からなり、本体板３１２と該本体板３１２の一方の端部から後述するメスターミナル２６１を接続可能な接続端子３１１が突出形成されてなる。なお、接続端子３１１は、本体板３１２側が幅狭で、先端側は幅広である。幅狭の部分が上記端子保持部５２において保持される領域となる。 As shown in FIGS. 1 and 2, the radiating fin 32 is composed of two L-shaped frames 321 and 322 and a thin corrugated plate 320, and has a rectangular shape surrounded by the two L-shaped frames 321 and 322. The corrugated plate 320 is accommodated in a space. The L-shaped frames 321 and 322 and the corrugated plate 320 are integrated by brazing. Here, each of the L-shaped frames 321 and 322 and the corrugated plate 320 is made of aluminum.
The electrode plate 31 is a long and thin flat metal plate made of brass, and has a main body plate 312 and a connection terminal 311 that can connect a female terminal 261 described later from one end of the main body plate 312. . The connection terminal 311 is narrow on the main body plate 312 side and wide on the distal end side. A narrow portion is a region held in the terminal holding portion 52.

発熱素子３３０を保持する保持具５について説明する。
発熱素子３３０はチタン酸バリウム磁器半導体のＰＴＣ素子からなる。保持具５は、絶縁性のナイロンからなる。
保持具５は、図５に示すごとく、発熱素子３３０を保持する素子保持部５１と、該素子保持部５１より幅狭で、上記素子保持部５１の側部、更に発熱体３の側面３０４から突出して、上記電極板３１の接続端子３１１を案内して保持する端子保持部５２と、該端子保持部５２と反対側の側部から突出した突出部５３とからなる。端子保持部５２と突出部５３は発熱体３の組立を容易とするため同形状で、保持具５全体が左右対称形状である。また、素子保持部５１、端子保持部５２、突出部５３はいずれも断面Ｈ型である。 The holder 5 that holds the heating element 330 will be described.
The heating element 330 is composed of a barium titanate ceramic semiconductor PTC element. The holder 5 is made of insulating nylon.
As shown in FIG. 5, the holder 5 includes an element holding part 51 that holds the heating element 330, a width narrower than the element holding part 51, and from the side part of the element holding part 51 and the side face 304 of the heating element 3. A terminal holding part 52 that protrudes and guides and holds the connection terminal 311 of the electrode plate 31 and a protruding part 53 protruding from the side opposite to the terminal holding part 52 are provided. The terminal holding part 52 and the projecting part 53 have the same shape for facilitating the assembly of the heating element 3, and the whole holding tool 5 has a symmetrical shape. The element holding portion 51, the terminal holding portion 52, and the protruding portion 53 are all H-shaped in cross section.

素子保持部５１は、図５〜図７に示すごとく、発熱体３の積層方向に突出した一対の壁部５１１と一対の壁部５１１間を橋渡しする板部５１０とからなり、保持具５と積層方向上側で隣接する放熱フィン３２を保持し、積層方向上側に開口した保持溝５１５を有する。板部５１０には発熱素子３３０を保持する保持穴５１９を４個設けてある。
素子保持部５１は断面Ｈ型であり、積層方向下側に開口した保持溝５１６が上記壁部５１１と板部５１０によって形成される。この保持溝５１６が電極板３１の本体板３１２を保持する。
また、端子保持部５２は、図５、図６、図８、図１３、図１４に示すごとく、発熱体３の積層方向に突出した一対の絶縁壁部５２１と一対の絶縁壁部５２１間を橋渡しする板部５２０とからなり、保持具５と積層方向下側で隣接する接続端子３１１を案内して保持し、積層方向上側に開口した保持溝５２５を有する。
また、壁部５１１、絶縁壁部５２１の高さは本体板３１２、接続端子３１１の厚みよりも大きいため、図１４に示したように、電極板３１を確実に絶縁保持することができる。 As shown in FIGS. 5 to 7, the element holding portion 51 includes a pair of wall portions 511 protruding in the stacking direction of the heating elements 3 and a plate portion 510 that bridges between the pair of wall portions 511. It has a holding groove 515 that holds the adjacent fin 32 on the upper side in the stacking direction and opens on the upper side in the stacking direction. The plate portion 510 is provided with four holding holes 519 for holding the heat generating elements 330.
The element holding portion 51 has an H-shaped cross section, and a holding groove 516 that is opened downward in the stacking direction is formed by the wall portion 511 and the plate portion 510. The holding groove 516 holds the main body plate 312 of the electrode plate 31.
Further, as shown in FIGS. 5, 6, 8, 13, and 14, the terminal holding portion 52 is formed between the pair of insulating wall portions 521 and the pair of insulating wall portions 521 that protrude in the stacking direction of the heating elements 3. It comprises a plate portion 520 that bridges, and holds and holds the connection terminal 311 adjacent to the holder 5 on the lower side in the stacking direction, and has a holding groove 525 opened on the upper side in the stacking direction.
Further, since the height of the wall portion 511 and the insulating wall portion 521 is larger than the thickness of the main body plate 312 and the connection terminal 311, the electrode plate 31 can be reliably insulated and held as shown in FIG. 14.

図１、図２、図３に示すごとく、第１絶縁体４１は発熱体３の積層方向における最端に位置する電極板３１と第１保持フレーム２１との間を絶縁し、第２絶縁体４２は発熱体３の積層方向における最端に位置する放熱フィン３２と第２保持フレーム２２との間を絶縁する。
図９に示すごとく、第１絶縁体４１は本体保持部４０１、端子保持部４０２、突出部４０３とからなる。本体保持部４０１は、積層方向下側で隣接する電極板３１を保持可能に構成した溝型で、電極板３１の本体板３１２を保持する、一対の壁部４１１と一対の壁部４１１の間を橋渡しする板部からなる保持溝を有する。
端子保持部４０２は、本体保持部４０１よりも幅細で、発熱体３の側面３０４から突出し、電極板３１の接続端子３１１を保持する、一対の絶縁壁部４１２と一対の絶縁壁部４１２の間を橋渡しする板部からなる保持溝を有する。
突出部４０３は、端子保持部４０２と同形状で、端子保持部４０２の反対側の端部にある。
図示を略したが、第２絶縁体４２は、第１絶縁体４１と同形状で、積層方向上側で隣接する放熱フィン３２を保持可能な溝型である。 As shown in FIGS. 1, 2, and 3, the first insulator 41 insulates between the electrode plate 31 located at the extreme end in the stacking direction of the heating element 3 and the first holding frame 21, and the second insulator 42 insulates between the radiation fins 32 located at the extreme end in the stacking direction of the heating elements 3 and the second holding frame 22.
As shown in FIG. 9, the first insulator 41 includes a main body holding part 401, a terminal holding part 402, and a protruding part 403. The main body holding portion 401 is a groove type configured to be able to hold the adjacent electrode plate 31 on the lower side in the stacking direction, and between the pair of wall portions 411 and the pair of wall portions 411 that hold the main body plate 312 of the electrode plate 31. It has a holding groove which consists of a board part which bridges.
The terminal holding portion 402 is narrower than the main body holding portion 401, protrudes from the side surface 304 of the heating element 3, and includes a pair of insulating wall portions 412 and a pair of insulating wall portions 412 that hold the connection terminals 311 of the electrode plate 31. It has a holding groove consisting of a plate part that bridges between them.
The protruding portion 403 has the same shape as the terminal holding portion 402 and is located at the end on the opposite side of the terminal holding portion 402.
Although not shown, the second insulator 42 has the same shape as the first insulator 41 and is a groove type that can hold the adjacent heat dissipating fins 32 on the upper side in the stacking direction.

図１、図１０に示すごとく、第１及び第２保持フレーム２１、２２は断面四角形の筒型中空部材で、発熱体３の側面に向かう開口部２１３、２１４、２２３、２２４を有する。また、後述するケース２３、２４の係合片２３５、２４５と係合する係合穴２１７、２１８、２２７、２２８を長手方向両端に有する。
また、図１、図４に示すごとく、側部フレーム１は、対向する一対の第１及び第２固定片１１、１２と、上記第１及び第２固定片１１、１２の間を橋渡しする環状の支持部１０とからなるコ字状枠体からなる。 As shown in FIGS. 1 and 10, the first and second holding frames 21, 22 are cylindrical hollow members having a square cross section, and have openings 213, 214, 223, 224 facing the side surface of the heating element 3. In addition, engagement holes 217, 218, 227, and 228 that engage with engagement pieces 235 and 245 of cases 23 and 24, which will be described later, are provided at both ends in the longitudinal direction.
As shown in FIGS. 1 and 4, the side frame 1 has an annular shape that bridges between a pair of opposed first and second fixed pieces 11 and 12 and the first and second fixed pieces 11 and 12. It consists of a U-shaped frame consisting of the support part 10.

第１及び第２固定片１１、１２は、支持部１０から延びる基端部１１１、１２１と該基端部１１１、１２１から更に延びる先端部１１３、１２３とからなり、上記基端部１１１、１２１と上記先端部１１３、１２３との間に、上記発熱体３の端面３０１、３０２の長手方向に沿って断面Ｖ字状に屈曲され、かつ第１及び第２保持フレーム２１、２２の外側から内側に向けて屈曲された屈曲部１１２、１２２を有する。
上記基端部１１１、１２１は、支持部１０の両端から緩やかなカーブ状に延び、先端部１１３、１２３は直線状に延びた部材である。基端部１１１、１２１と先端部１１３、１２３との境界で、第１、第２固定片１１、１２はく字状に折れ曲がり、この部分が曲折部１１２、１２２となる。 The first and second fixing pieces 11 and 12 are composed of base end portions 111 and 121 extending from the support portion 10 and distal end portions 113 and 123 extending further from the base end portions 111 and 121, and the base end portions 111 and 121. Between the first and second holding frames 21, 22 and between the first and second holding frames 21, 22. The bent portions 112 and 122 are bent toward the front.
The base end portions 111 and 121 extend from both ends of the support portion 10 in a gentle curve shape, and the tip end portions 113 and 123 are members that extend linearly. At the boundary between the base end portions 111 and 121 and the tip end portions 113 and 123, the first and second fixing pieces 11 and 12 are bent into a square shape, and these portions become the bent portions 112 and 122, respectively.

上記側部フレーム１は、支持部１０を発熱体３の側面３０３、３０４に対面し、第１固定片１１を第１保持フレーム２１に、第２固定片１２を第２保持フレーム２２に、それぞれ開口部２１３、２１４、２２３、２２４から差し込む（図１２参照）ことで固定する。
ここで屈曲部１１２において、第１保持フレーム２１の内側面２１９に第１固定片１１の屈曲部１１２を、第２保持フレーム２２の内側面２２９に第２固定片１２の屈曲部１２２をそれぞれ接触させる。 The side frame 1 has the support portion 10 facing the side surfaces 303 and 304 of the heating element 3, the first fixed piece 11 to the first holding frame 21, and the second fixed piece 12 to the second holding frame 22, respectively. It fixes by inserting from opening part 213, 214, 223, 224 (refer FIG. 12).
Here, in the bent portion 112, the bent portion 112 of the first fixed piece 11 contacts the inner side surface 219 of the first holding frame 21, and the bent portion 122 of the second fixed piece 12 contacts the inner side surface 229 of the second holding frame 22. Let

支持部１０は環状である。図１３、図１４、図１１に示すごとく、側部フレーム１を発熱体３に固定する際に、環状の支持部１０の内周面１０１が端子保持部５２の絶縁壁部５２１の外側から接触して、端子保持部５２を挟持する。なお、符号１０２は支持部の外周面１０２である。
また、側部フレーム１はばね鋼であるＳＫ５から構成され、部材全体がばねとして機能する。すなわち、側部フレーム１は、一対の固定片１１、１２同士の間の距離を縮小させる方向に付勢力を作用させるよう構成されており、一対の固定片１１、１２の間に、第１及び第２保持フレーム２１、２２を介して、発熱体３を挟み込むことにより、発熱体３を積層方向に保持するよう構成されている。 The support part 10 is annular. As shown in FIGS. 13, 14, and 11, when the side frame 1 is fixed to the heating element 3, the inner peripheral surface 101 of the annular support portion 10 contacts from the outside of the insulating wall portion 521 of the terminal holding portion 52. Then, the terminal holding part 52 is clamped. Reference numeral 102 denotes the outer peripheral surface 102 of the support portion.
Moreover, the side part frame 1 is comprised from SK5 which is spring steel, and the whole member functions as a spring. That is, the side frame 1 is configured to apply a biasing force in a direction in which the distance between the pair of fixed pieces 11 and 12 is reduced, and between the pair of fixed pieces 11 and 12, The heating element 3 is held in the stacking direction by sandwiching the heating element 3 via the second holding frames 21 and 22.

本例の電気式ヒータ１は、上記側部フレーム１の側面の外方から被冠するケース２３、２４を有する。
図１の左方のケース２３は、側面形状が長方形で、側部フレーム１側に延びる内側係合片２３５を備え、該内側係合片２３５が第１、第２保持フレーム２１、２２の左方の係合穴２１７、２２７と係合する。
図１の右方のケース２４は、両端にそれぞれ鍔部２４１を有し、側部フレーム１側に延びる内部係合片２４５、ケース２４を貫通し、上記電極板３１の接続端子３１１を挿入して、これを外部に引き出す挿入溝２４９を有する。
また、ケース２４は、発熱体３の外方側に上記接続端子３１１と接続するメスターミナル２６１を挿入するターミナル用スリット２４０を有する。
また、ケース２４は、上記メスターミナル２６１を挿入すると共に上記ケース２４の外方から被せてメスターミナル２６１を保護収納する保護ケース２５を有する。
なお、メスターミナル２６１から延びるリード線２６２は、電気式ヒータ２の外部電源（図示略）に接続するソケット２６３、２６４を有する。 The electric heater 1 of this example includes cases 23 and 24 that are crowned from the outside of the side surface of the side frame 1.
The case 23 on the left side in FIG. 1 has a rectangular side shape and includes an inner engagement piece 235 extending toward the side frame 1, and the inner engagement piece 235 is located on the left of the first and second holding frames 21 and 22. The engagement holes 217 and 227 on the other side are engaged.
The right case 24 in FIG. 1 has flanges 241 at both ends, penetrates the internal engagement piece 245 extending toward the side frame 1 and the case 24, and inserts the connection terminal 311 of the electrode plate 31. In addition, an insertion groove 249 is provided to pull this out.
The case 24 has a terminal slit 240 for inserting the female terminal 261 connected to the connection terminal 311 on the outer side of the heating element 3.
The case 24 includes a protective case 25 for inserting the female terminal 261 and covering the female terminal 261 from the outside of the case 24 for protection.
The lead wire 262 extending from the female terminal 261 has sockets 263 and 264 that are connected to an external power source (not shown) of the electric heater 2.

本例の電気式ヒータ２の組立てについて説明する。
発熱素子３３０を保持具５に組込み、図１に示すごとく、第１絶縁体４１、電極板３１、放熱フィン３２、発熱素子３３０を保持した保持具５、電極板３１、放熱フィン３２・・・放熱フィン３２、第２絶縁体４２の順に積層する。
そして、第１及び第２絶縁体４１、４２の両端に、第１保持フレーム２１、第２保持フレーム２２を配置する。この時、図１０に示すごとく、保持具５、第１、第２絶縁体４１、４２が放熱フィン３２や電極板３１を保持し、これらが面３０５や面３０６の方向に飛び出ないようにして、発熱体３の積層状態を安定させる。
発熱体３において、図１１、図１２に示すごとく、側面３０４から第１、第２絶縁体４１、４２、保時具５の端子保持部４１２、５２が突出する。また、図示を略したが、発熱体３の側面３０３から、第１、第２絶縁体４１、４２、保持具５の突出部４０３、５３が突出する。 The assembly of the electric heater 2 of this example will be described.
As shown in FIG. 1, the heating element 330 is incorporated in the holder 5, and the first insulator 41, the electrode plate 31, the radiation fin 32, the holder 5 holding the heating element 330, the electrode plate 31, the radiation fin 32. The heat dissipating fins 32 and the second insulator 42 are stacked in this order.
Then, the first holding frame 21 and the second holding frame 22 are disposed at both ends of the first and second insulators 41 and 42. At this time, as shown in FIG. 10, the holder 5, the first and second insulators 41 and 42 hold the radiating fins 32 and the electrode plate 31 so that they do not protrude in the direction of the surface 305 or the surface 306. The laminated state of the heating element 3 is stabilized.
In the heating element 3, as shown in FIGS. 11 and 12, the first and second insulators 41 and 42 and the terminal holding portions 412 and 52 of the timepiece 5 protrude from the side surface 304. Although not shown, the first and second insulators 41 and 42 and the protruding portions 403 and 53 of the holder 5 protrude from the side surface 303 of the heating element 3.

次に、側部フレーム１を発熱体３の側面３０４に組付ける。
図１２（ａ）、（ｂ）に示すごとく、第１及び第２保持フレーム２１、２２の発熱体３側の内壁面２１９、２２９間の距離Ｌ１よりも、屈曲部１１２、１２２の距離Ｌ０が大きくなるように側部フレーム１を変形させる。
図１２（ｂ）に示すごとく、変形した側部フレーム１の第１及び第２固定片１１、１２を発熱体３の側面３０４側から第１及び第２保持フレーム２１、２２の開口部２１４、２２４に差し込む。側部フレーム１は、自由状態では、（屈曲部１１２、１２２の距離Ｌ０）＜（内壁面２１９、２２９間の距離Ｌ１）であり、従って、図５（ｃ）に示すごとく、屈曲部１１２、１２２が内壁面２１９、２２９と当接しつつ、積層方向内側への圧縮力が内壁面２１９、２２９に作用して、側部フレーム１が第１、第２保持フレーム２１、２２に固定される。 Next, the side frame 1 is assembled to the side surface 304 of the heating element 3.
As shown in FIGS. 12A and 12B, the distance L0 between the bent portions 112 and 122 is greater than the distance L1 between the inner wall surfaces 219 and 229 of the first and second holding frames 21 and 22 on the heating element 3 side. The side frame 1 is deformed so as to increase.
As shown in FIG. 12 (b), the first and second fixing pieces 11, 12 of the deformed side frame 1 are opened from the side surface 304 side of the heating element 3 to the openings 214 of the first and second holding frames 21, 22. Plug into 224. In the free state, the side frame 1 is (distance L0 between the bent portions 112 and 122) <(distance L1 between the inner wall surfaces 219 and 229). Therefore, as shown in FIG. While the inner wall surfaces 219 and 229 come into contact with the inner wall surfaces 219 and 229, a compressive force inward in the stacking direction acts on the inner wall surfaces 219 and 229, and the side frame 1 is fixed to the first and second holding frames 21 and 22.

この時、発熱体３の側面３０４において、側部フレーム１の環状の本体部１０は、図１３、図１４に示すごとく、内周面１０１が発熱体３の側面３０４から飛び出した端子保持具４０２、５２の絶縁壁部４１２、５２１に外側から当接し、これを挟持することで、固定される。
そして、接続端子３１１と側部フレーム１の本体部１０の内側面１０１とが対面する範囲では、必ず、絶縁壁部５２１、４１２が両者の間に位置することとなって、両者の間で絶縁が確保できる。
なお、発熱体３の側面３０３側について図示は省略したが、側面３０４と同様に、側部フレーム１の環状の本体部１０の内周面１０１が側面３０３から突出した突出部４０３、５３に外側から当接して、これを挟持することで、固定される。 At this time, on the side surface 304 of the heating element 3, the annular main body 10 of the side frame 1 has a terminal holder 402 in which the inner peripheral surface 101 protrudes from the side surface 304 of the heating element 3 as shown in FIGS. 13 and 14. , 52 abuts against the insulating wall portions 412 and 521 from the outside and is fixed by sandwiching them.
In the range where the connection terminal 311 and the inner side surface 101 of the main body portion 10 of the side frame 1 face each other, the insulating wall portions 521 and 412 are always located between the two, so that insulation is provided between them. Can be secured.
Although the illustration of the side surface 303 side of the heating element 3 is omitted, like the side surface 304, the inner peripheral surface 101 of the annular main body portion 10 of the side frame 1 is outside the protruding portions 403 and 53 protruding from the side surface 303. It is fixed by abutting and pinching this.

次いで、上記側部フレーム１の外方から、ケース２３、２４を被冠し、更にケース２４の外方に保護ケース２５を被冠する。
ケース２３、２４はそれぞれ係合片２３５、２４５を有し、これら係合片２３５、２４５が第１保持フレーム、第２保持フレーム２１、２２の係合穴２１７、２１８、２２７、２２８と係合することで、ケース２３、２４が固定される。
この時、ケース２４の挿入溝２４９に、電極板３１の接続端子３１１を挿入し、該接続端子３１１をケース２４及び保護ケース２５との間でメスターミナル２６１と固定する。 Next, the cases 23 and 24 are crowned from the outside of the side frame 1, and the protective case 25 is crowned outside the case 24.
The cases 23 and 24 have engagement pieces 235 and 245, respectively. The engagement pieces 235 and 245 engage with the engagement holes 217, 218, 227 and 228 of the first holding frame and the second holding frames 21 and 22, respectively. As a result, the cases 23 and 24 are fixed.
At this time, the connection terminal 311 of the electrode plate 31 is inserted into the insertion groove 249 of the case 24, and the connection terminal 311 is fixed to the female terminal 261 between the case 24 and the protective case 25.

本例にかかる電気式ヒータ２は、端子保持部５２の絶縁壁部５２１からなる絶縁保持溝５２６の内側に電極板３１の接続端子３１１を保持し、また絶縁壁部５２１の外側から側部フレーム１が上記端子保持部５２を挟持するよう構成する。
これにより、絶縁壁部５２１が接続端子３１１と側部フレーム１との間に位置して両者を絶縁するため、発熱体３の側面３０４において、電極板３１に関して充分な絶縁状態を確保することができる。 The electric heater 2 according to this example holds the connection terminal 311 of the electrode plate 31 inside the insulating holding groove 526 formed of the insulating wall portion 521 of the terminal holding portion 52, and the side frame from the outside of the insulating wall portion 521. 1 is configured to sandwich the terminal holding portion 52.
Accordingly, since the insulating wall portion 521 is located between the connection terminal 311 and the side frame 1 and insulates them, it is possible to ensure a sufficient insulation state with respect to the electrode plate 31 on the side surface 304 of the heating element 3. it can.

以上、本例によれば、電極板３１が発熱体３の側面において充分に絶縁された電気式ヒータ２を提供することができる。   As described above, according to this example, it is possible to provide the electric heater 2 in which the electrode plate 31 is sufficiently insulated on the side surface of the heating element 3.

（実施例２）
本例は、図１５〜図２２に示すごとく、電極板３１の絶縁状態を充分に確保することができる他の電気式ヒータ２を示す例である。
図１５〜図１８に示すごとく、本例の絶縁性発熱素子保持具（以下に単に保持具という。）５は、発熱体３の積層方向における表面に、電極板３１を配置するための保持溝５５を有していると共に、各側部フレーム１、１９と対向する側面に、各側部フレーム１、１９を挿入配置するための保持凹部５４をそれぞれ有している。そして、保持溝５５は電極板３１を保持することができ、各保持凹部５４は各側部フレーム１、１９をそれぞれ保持することができる。 (Example 2)
As shown in FIGS. 15 to 22, this example is another example of the electric heater 2 that can sufficiently secure the insulating state of the electrode plate 31.
As shown in FIGS. 15 to 18, an insulating heating element holder (hereinafter simply referred to as a holder) 5 of this example is a holding groove for arranging the electrode plate 31 on the surface of the heating element 3 in the stacking direction. 55 and a holding recess 54 for inserting and arranging the side frames 1 and 19 on the side surfaces facing the side frames 1 and 19, respectively. The holding groove 55 can hold the electrode plate 31, and the holding recesses 54 can hold the side frames 1 and 19, respectively.

また、図１５、図１７に示すごとく、本例の保持具５は、上記保持溝５５と保持凹部５４との間に、電極板３１と各側部フレーム１、１９との間の絶縁を行うための絶縁肉部５６を形成してなる。そして、電極板３１と各側部フレーム１、１９とは、保持具５の絶縁肉部５６によって絶縁されている。
これにより、各側部フレーム１、１９を導電性のある材料を用いて構成した場合でも、保持具５の絶縁肉部５６が電極板３１と各側部フレーム１、１９との間に位置して両者を絶縁するため、電極板３１に関して充分な絶縁状態を確保することができる。 As shown in FIGS. 15 and 17, the holder 5 of this example performs insulation between the electrode plate 31 and the side frames 1 and 19 between the holding groove 55 and the holding recess 54. For this purpose, an insulating meat portion 56 is formed. In addition, the electrode plate 31 and the side frames 1 and 19 are insulated by the insulating meat portion 56 of the holder 5.
As a result, even when each side frame 1, 19 is configured using a conductive material, the insulating thick portion 56 of the holder 5 is positioned between the electrode plate 31 and each side frame 1, 19. Since both are insulated, a sufficient insulation state can be secured for the electrode plate 31.

図１５、図１７に示すごとく、本例の発熱体３は、発熱フィン３２、電極板３１及び保持具５を積層してなる発熱ユニット３０を複数段に積み重ねてなる。具体的には、本例の発熱体３は、発熱ユニット３０を５段に積み重ねてなる。
そして、発熱体３は、各側部フレーム１、１９の本体部１０を各保持具５の保持凹部５４に挿通配置し、各側部フレーム１、１９の一対の固定片１１、１２が、第１及び第２保持フレーム２１、２２を介して、各発熱ユニット３０の積層状態を付勢することにより、一体化されている。
なお、図１５は、側部フレーム１を各保持具５の保持凹部５４に挿通配置した状態を示し、図１６は、側部フレーム１を各保持具５の保持凹部５４に挿通配置する前の状態を示す。 As shown in FIGS. 15 and 17, the heating element 3 of this example is formed by stacking a plurality of heating units 30 formed by stacking heating fins 32, an electrode plate 31 and a holder 5. Specifically, the heating element 3 of this example is formed by stacking the heating units 30 in five stages.
And the heat generating body 3 inserts and arrange | positions the main-body part 10 of each side part frame 1 and 19 to the holding | maintenance recessed part 54 of each holder 5, and a pair of fixing pieces 11 and 12 of each side part frame 1 and 19 are the 1st. The heating units 30 are integrated by energizing the stacked state of the heat generating units 30 via the first and second holding frames 21 and 22.
15 shows a state in which the side frame 1 is inserted and arranged in the holding recess 54 of each holder 5, and FIG. 16 shows a state before the side frame 1 is inserted in the holding recess 54 of each holder 5. Indicates the state.

また、図１８に示すごとく、各保持具５は、上記積層方向における両表面に保持溝５５を有しており、一方側（本例では上側）の保持溝５５に発熱フィン３２の端部及び電極板３１を保持していると共に、他方側（本例では下側）の保持溝５５に他の発熱フィン３２の端部を保持している。
また、各保持溝５５は、発熱体３の積層方向に突出した一対の壁部５５１と一対の壁部５５１間を橋渡しする板部５５０とによって形成されている。 Further, as shown in FIG. 18, each holder 5 has holding grooves 55 on both surfaces in the stacking direction, and the end portions of the heat generating fins 32 and the holding grooves 55 on one side (in this example, the upper side) and The electrode plate 31 is held, and the end of the other heat generating fin 32 is held in the holding groove 55 on the other side (lower side in this example).
Each holding groove 55 is formed by a pair of wall portions 551 protruding in the stacking direction of the heating elements 3 and a plate portion 550 that bridges between the pair of wall portions 551.

また、図１５、図１９に示すごとく、上側の保持溝５５を形成する壁部５５１の一部には、上記電極板３１の接続端子３１１を挿通配置するための切欠き部５５２が形成されている。また、本例の電極板３１は、保持具５の正面方向に突出してなる接続端子３１１を有している。そして、この接続端子３１１は、切欠き部５５２に挿通配置されて、保持具５の正面方向に突出している。
また、本例の電極板３１は、略平板形状を有しており、本体板３１２と接続端子３１１とは、略同一面を形成している。また、接続端子３１１は、保持具５の正面方向に突出するために、本体板３１２に対して屈曲形成されており、本体板３１２と共にＬ形状を形成している。
これにより、電極板３１の接続端子３１１を正面方向に取り出すことができ、発熱体３の側方（横方向）にスペースの制約がある場合でも、適切に接続端子３１１を取り出すことができる。また、電気式ヒータ２の横方向の寸法を小さくすることができる。 Further, as shown in FIGS. 15 and 19, a notch portion 552 for inserting and arranging the connection terminal 311 of the electrode plate 31 is formed in a part of the wall portion 551 forming the upper holding groove 55. Yes. In addition, the electrode plate 31 of the present example has a connection terminal 311 that protrudes in the front direction of the holder 5. The connection terminal 311 is inserted into the notch 552 and protrudes in the front direction of the holder 5.
Moreover, the electrode plate 31 of this example has a substantially flat plate shape, and the main body plate 312 and the connection terminal 311 form substantially the same surface. Further, the connection terminal 311 is bent with respect to the main body plate 312 so as to protrude in the front direction of the holder 5, and forms an L shape together with the main body plate 312.
Thereby, the connection terminal 311 of the electrode plate 31 can be taken out in the front direction, and the connection terminal 311 can be taken out properly even when there is a space restriction on the side (lateral direction) of the heating element 3. In addition, the lateral dimension of the electric heater 2 can be reduced.

また、電極板３１の接続端子３１１は、以下の形状にすることもできる。
すなわち、図２０〜図２２に示すごとく、電極板３１の接続端子３１１は、本体板３１２に対して略直角に起立するよう形成することもできる。そして、この場合には、この略直角に起立した状態の接続端子３１１を、保持具５の正面方向に突出させることができる。また、この場合には、接続端子３１１の横方向の長さを小さくすることができ、接続端子３１１が、横方向において占有するスペースを小さくすることができる。
本例においても、電極板３１が充分に絶縁された電気式ヒータ２を提供することができる。また、本例においても、その他の構成は上記実施例１と同様であり、上記実施例１と同様の作用効果を得ることができる。 Moreover, the connection terminal 311 of the electrode plate 31 can also be made into the following shapes.
That is, as shown in FIGS. 20 to 22, the connection terminal 311 of the electrode plate 31 can be formed to stand substantially perpendicular to the main body plate 312. In this case, the connection terminal 311 standing in a substantially right angle can be projected in the front direction of the holder 5. In this case, the length of the connection terminal 311 in the horizontal direction can be reduced, and the space occupied by the connection terminal 311 in the horizontal direction can be reduced.
Also in this example, the electric heater 2 in which the electrode plate 31 is sufficiently insulated can be provided. Also in this example, other configurations are the same as those in the first embodiment, and the same effects as those in the first embodiment can be obtained.

実施例１にかかる、電気式ヒータの斜視展開図。FIG. 3 is a perspective development view of the electric heater according to the first embodiment. 実施例１にかかる、電気式ヒータの平面図。1 is a plan view of an electric heater according to Embodiment 1. FIG. 実施例１にかかる、発熱体の模式図。1 is a schematic diagram of a heating element according to Example 1. FIG. 実施例１にかかる、側部フレームの斜視図。The perspective view of the side part frame concerning Example 1. FIG. 実施例１にかかる、絶縁性発熱素子保持具と発熱素子との説明図。Explanatory drawing of the insulating heat generating element holder and heat generating element concerning Example 1. FIG. 実施例１にかかる、絶縁性発熱素子保持具の平面図。The top view of the insulating heat generating element holder concerning Example 1. FIG. 実施例１にかかる、絶縁性発熱素子保持具の素子保持部の断面図（図７のＡ−Ａ矢視断面図）。Sectional drawing (AA arrow sectional drawing of FIG. 7) of the element holding | maintenance part of the insulating heat generating element holder concerning Example 1. FIG. 実施例１にかかる、絶縁性発熱素子保持具の端子保持部の断面図（図７のＢ−Ｂ矢視断面図）。Sectional drawing (BB sectional drawing of FIG. 7) of the terminal holding | maintenance part of the insulating heat generating element holder concerning Example 1. FIG. 実施例１にかかる、第１絶縁体の斜視図。The perspective view of the 1st insulator concerning Example 1. FIG. 実施例１にかかる、電気式ヒータの発熱体積層方向の断面説明図。Sectional explanatory drawing of the heat generating body lamination direction of the electric heater concerning Example 1. FIG. 実施例１にかかる、発熱体の側面付近の斜視図。FIG. 3 is a perspective view of the vicinity of the side surface of the heating element according to the first embodiment. 実施例１にかかる、発熱体側面に側部フレームを組み付ける説明図。Explanatory drawing which assembles | assembles a side part frame to the heat generating body side concerning Example 1. FIG. 実施例１にかかる、端子保持部における、絶縁壁部と接続端子と側部フレームの当接状態を示す説明図。Explanatory drawing which shows the contact state of the insulating wall part, connection terminal, and side part frame in the terminal holding part concerning Example 1. FIG. 実施例１にかかる、図１３のＣ−Ｃ矢視断面図。CC sectional view taken on the line of FIG. 13 concerning Example 1. FIG. 実施例２にかかる、側部フレームを設ける前の発熱体の側面の説明図。Explanatory drawing of the side surface of the heat generating body before providing the side part frame concerning Example 2. FIG. 実施例２にかかる、側部フレームを設けた発熱体の側面の説明図。Explanatory drawing of the side surface of the heat generating body which provided the side part frame concerning Example 2. FIG. 実施例２にかかる、電気式ヒータの平面図。The top view of the electric heater concerning Example 2. FIG. 実施例２にかかる、電気式ヒータの発熱体積層方向の断面説明図。Sectional explanatory drawing of the heat generating body lamination direction of the electric heater concerning Example 2. FIG. 実施例２にかかる、電極板の端子部を示す説明図。Explanatory drawing which shows the terminal part of the electrode plate concerning Example 2. FIG. 実施例２にかかる、側部フレームを設けた他の発熱体の側面の説明図。Explanatory drawing of the side surface of the other heat generating body which provided the side part frame concerning Example 2. FIG. 実施例２にかかる、他の電極板の端子部を示す説明図。Explanatory drawing which shows the terminal part of the other electrode plate concerning Example 2. FIG. 実施例２にかかる、他の電極板の端子部を示す斜視図。The perspective view which shows the terminal part of the other electrode board concerning Example 2. FIG. 従来にかかる、電気式ヒータの展開説明図。Explanatory drawing of an electric heater concerning the past.

符号の説明Explanation of symbols

１ 側部フレーム
２ 電気式ヒータ
２１、２２ 第１、第２保持フレーム
３ 発熱体
３０３、３０４ 側面
３１ 電極板
３３０ 発熱素子
５ 絶縁性発熱素子保持具
５１ 素子保持部
５２ 端子保持部
５２１ 絶縁壁部
５２０ 板部 DESCRIPTION OF SYMBOLS 1 Side part frame 2 Electric heater 21, 22 1st, 2nd holding frame 3 Heat generating body 303, 304 Side surface 31 Electrode plate 330 Heating element 5 Insulating heating element holder 51 Element holding part 52 Terminal holding part 521 Insulating wall part 520 plate

Claims (3)

放熱フィン、通電により発熱する発熱素子と該発熱素子を保持する絶縁性発熱素子保持具、上記発熱素子に電力を印加する電極板を積層して構成した発熱体を有し、被加熱媒体が上記放熱フィンの近傍を通過する電気式ヒータであって、
該電気式ヒータは、上記発熱体の積層方向両端面に第１及び第２保持フレームを有すると共に、上記発熱体の両側面にそれぞれ側部フレームを有しており、
上記電極板は、上記発熱体の側面から突出した接続端子を有しており、
上記絶縁性発熱素子保持具は、上記発熱素子を保持する素子保持部と、上記接続端子を保持する端子保持部とを有し、かつ上記端子保持部は、発熱体の積層方向に突出した一対の絶縁壁部と一対の絶縁壁部間を橋渡しする板部とからなる絶縁保持溝を有しており、
上記絶縁保持溝において、上記接続端子は一対の絶縁壁部の内側に挟持されると共に、上記側部フレームは、一対の絶縁壁部の外側から上記端子保持部を挟持してなり、上記絶縁壁部が上記接続端子と上記側部フレームとの間にあって両者を絶縁することを特徴とする電気式ヒータ。 A heat dissipating fin, a heat generating element that generates heat when energized, an insulating heat generating element holder that holds the heat generating element, and a heating element configured by laminating an electrode plate that applies power to the heat generating element. An electric heater that passes in the vicinity of the radiation fins,
The electric heater has first and second holding frames on both end surfaces of the heating element in the stacking direction, and side frames on both side faces of the heating element,
The electrode plate has a connection terminal protruding from the side surface of the heating element,
The insulating heating element holder has an element holding part for holding the heating element and a terminal holding part for holding the connection terminal, and the terminal holding part is a pair protruding in the stacking direction of the heating elements. Having an insulating holding groove composed of an insulating wall portion and a plate portion that bridges between the pair of insulating wall portions,
In the insulating holding groove, the connection terminal is held inside the pair of insulating walls, and the side frame holds the terminal holding part from the outside of the pair of insulating walls. An electric heater having a portion between the connection terminal and the side frame to insulate both. 請求項１において、上記絶縁性発熱素子保持具の素子保持部は、上記発熱体の積層方向に突出した一対の壁部と該一対の壁部間を橋渡しする板部とからなり、上記絶縁性発熱素子保持具と積層方向に隣接する上記放熱フィン又は上記電極板の少なくとも一方を保持する保持溝を有することを特徴とする電気式ヒータ。   2. The insulating heating element holder according to claim 1, wherein the element holding portion includes a pair of wall portions projecting in the stacking direction of the heating elements and a plate portion that bridges between the pair of wall portions. An electric heater comprising a holding groove for holding at least one of the heat dissipating fins or the electrode plate adjacent to the heating element holder in the stacking direction. 放熱フィン、通電により発熱する発熱素子と該発熱素子を保持する絶縁性発熱素子保持具、上記発熱素子に電力を印加する電極板を積層して構成した発熱体を有し、被加熱媒体が上記放熱フィンの近傍を通過する電気式ヒータであって、
該電気式ヒータは、上記発熱体の積層方向両端面に第１及び第２保持フレームを有すると共に、上記発熱体の両側面にそれぞれ側部フレームを有しており、
上記絶縁性発熱素子保持具は、上記積層方向における表面に、上記電極板を配置するための保持溝を有していると共に、上記側部フレームと対向する側面に、該側部フレームを挿入配置するための保持凹部を有しており、
上記電極板は、上記絶縁性発熱素子保持具の正面方向に突出してなる接続端子を有しており、
上記電極板と上記側部フレームとは、上記絶縁性発熱素子保持具によって絶縁されていることを特徴とする電気式ヒータ。 A heat dissipating fin, a heat generating element that generates heat when energized, an insulating heat generating element holder that holds the heat generating element, and a heating element configured by laminating an electrode plate that applies power to the heat generating element. An electric heater that passes in the vicinity of the radiation fins,
The electric heater has first and second holding frames on both end surfaces of the heating element in the stacking direction, and side frames on both side faces of the heating element,
The insulating heating element holder has a holding groove for arranging the electrode plate on the surface in the stacking direction, and the side frame is inserted and arranged on a side surface facing the side frame. Has a holding recess for
The electrode plate has a connection terminal protruding in the front direction of the insulating heating element holder,
The electric heater, wherein the electrode plate and the side frame are insulated by the insulating heating element holder.
JP2004193538A 2003-09-10 2004-06-30 Electric heater Expired - Fee Related JP3988749B2 (en)

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