JPH071751Y2 - Heating element using positive temperature coefficient thermistor - Google Patents
Heating element using positive temperature coefficient thermistorInfo
- Publication number
- JPH071751Y2 JPH071751Y2 JP8565589U JP8565589U JPH071751Y2 JP H071751 Y2 JPH071751 Y2 JP H071751Y2 JP 8565589 U JP8565589 U JP 8565589U JP 8565589 U JP8565589 U JP 8565589U JP H071751 Y2 JPH071751 Y2 JP H071751Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- temperature coefficient
- electrode terminal
- positive temperature
- case
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、芳香剤、殺虫剤、忌避剤、殺ダニ剤、殺菌
剤、防バイ剤等の薬剤を加熱して燻蒸する電気燻蒸器に
用いられる正特性サーミスタを利用した発熱体に関す
る。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an electric fumigator for heating and fumigating chemicals such as fragrances, insecticides, repellents, acaricides, bactericides and antifungal agents. The present invention relates to a heating element using a positive temperature coefficient thermistor used.
電気燻蒸器としては、例えば実公昭44-8361号公報に示
されるように、液状の薬剤を毛細管現象によって芯棒に
浸透させ、その芯棒の外周をドーナツ状の発熱体で加熱
して芯棒から薬剤を放散させる電気燻蒸器が知られてい
る。As an electric fumigator, for example, as shown in Japanese Utility Model Publication No. 44-8361, a liquid drug is permeated into a core rod by a capillary phenomenon, and the outer periphery of the core rod is heated by a donut-shaped heating element to form a core rod. There is known an electric fumigation device that disperses a drug from the.
かかるドーナツ状の発熱体としては正特性サーミスタを
用いたものが種々提案されている。Various donut-shaped heating elements using a positive temperature coefficient thermistor have been proposed.
例えば、実開昭63-167696号公報に示す正特性サーミス
タを利用した発熱体が知られている。For example, a heating element using a positive temperature coefficient thermistor disclosed in Japanese Utility Model Laid-Open No. 63-167696 is known.
すなわち、第15図に示すようにケース１に筒部２を設
け、この筒部２の内径孔３内に放熱筒体４を挿着し、そ
の放熱筒体４の内壁面4aを発熱面とし、前記筒部２の方
形状の外面５にコ字状の第１電極端子６を設け、この第
１電極端子６に一対の正特性サーミスタ7,7を接触して
それぞれ設けると共に、ケース１内に設けた第２電極端
子８を一対の正特性サーミスタ7,7に接触させ、正特性
サーミスタ７の第１電極71を第１電極端子６に接触させ
ると共に、第２電極72を第２電極端子８に接触させ、正
特性サーミスタ７に通電して発生した熱を筒部２を介し
て放熱筒体４に伝達できるようにしてある。That is, as shown in FIG. 15, a case 1 is provided with a tube portion 2, a heat radiating cylinder 4 is inserted in an inner diameter hole 3 of the case 2, and an inner wall surface 4a of the heat radiating cylinder 4 is used as a heat generating surface. , A square-shaped outer surface 5 of the cylindrical portion 2 is provided with a U-shaped first electrode terminal 6, and a pair of positive temperature coefficient thermistors 7, 7 are provided in contact with the first electrode terminal 6, respectively, and in the case 1 contacting the second electrode terminal 8 provided on the pair of the PTC thermistors 7,7, with contacting the first electrode 7 1 PTC thermistor 7 to the first electrode terminal 6, the second electrode 7 2 second The heat generated by making contact with the electrode terminals 8 and energizing the PTC thermistor 7 can be transferred to the heat radiating cylinder 4 via the cylinder 2.
かかる正特性サーミスタを利用した発熱体であると、平
板状の正特性サーミスタを利用できるので、例えば実開
昭63-114002号公報の第８図に示す中心部に貫通孔を有
するドーナツ状の正特性サーミスタに比べて貫通孔を穿
孔する作業が不要となるから、正特性サーミスタの製造
が容易となり、発熱体の製造コストを安価にでき等の利
点を有する。A heating element using such a positive temperature coefficient thermistor can use a plate-shaped positive temperature coefficient thermistor, and therefore, for example, a donut shape positive hole having a through hole at the center shown in FIG. 8 of Japanese Utility Model Laid-Open No. 63-114002. As compared with the characteristic thermistor, the work of forming the through hole is not required, and therefore the positive characteristic thermistor can be easily manufactured, and the manufacturing cost of the heating element can be reduced, which is an advantage.
かかる発熱体においては、正特性サーミスタが発生した
熱は第１電極端子６を介して放熱筒体４に伝わると共
に、発生した熱の一部分は第２電極端子８に伝わる。In such a heating element, the heat generated by the positive temperature coefficient thermistor is transferred to the heat dissipation cylinder 4 via the first electrode terminal 6, and a part of the generated heat is transferred to the second electrode terminal 8.
他方、第１電極端子６はケース１と蓋とで上下に動かな
いように挾持しているので第１電極端子６とケース１、
蓋との接触面積が広くなって第１電極端子６に伝わった
正特性サーミスタが発生した熱の一部分がケース１、蓋
に伝わり、第２電極端子８はケース１の内周面に接して
動かないように保持しているから第２電極端子８とケー
ス１の接触面積が広くなって第２電極端子８の熱の一部
分がケース１に伝わる。On the other hand, since the first electrode terminal 6 is held by the case 1 and the lid so as not to move up and down, the first electrode terminal 6 and the case 1,
A part of the heat generated by the positive temperature coefficient thermistor transmitted to the first electrode terminal 6 due to the increased contact area with the lid is transmitted to the case 1 and the lid, and the second electrode terminal 8 moves in contact with the inner peripheral surface of the case 1. Since it is held so that it does not exist, the contact area between the second electrode terminal 8 and the case 1 becomes large, and a part of the heat of the second electrode terminal 8 is transferred to the case 1.
このために、第１・第２電極端子6,8よりケース１、蓋
に伝導する熱が多くなって、正特性サーミスタ６が発生
した熱を放熱筒体４に効率良く伝熱できずに熱効率が低
下するばかりか、ケース１、蓋自体の温度が高温とな
り、電気燻蒸装置の装置本体への熱伝導が著しくなって
装置本体の温度が高くなることがあるので、装置本体を
耐熱性に優れた材料により作成したり、発熱体と装置本
体との間隔が広くなる形状としたり、大型化する等の断
熱性への配慮が必要となるので、電気燻蒸装置が高価と
なる。For this reason, more heat is conducted to the case 1 and the lid than the first and second electrode terminals 6 and 8, and the heat generated by the positive temperature coefficient thermistor 6 cannot be efficiently transferred to the heat radiating cylinder 4, resulting in thermal efficiency. The temperature of the case 1 and the lid itself may become high, and the heat conduction to the main body of the electric fumigation device may become remarkable, and the temperature of the main body of the device may become high. The fumigation apparatus is expensive because it needs to be made of a different material, has a shape in which the distance between the heating element and the apparatus main body is wide, and needs to be considered in terms of heat insulation such as an increase in size.
また、正特性サーミスタ７の第１電極71が、第１電極端
子６を介して筒部２に接触するから、第１電極端子６の
ために筒部２への熱伝導性が低下し正特性サーミスタ７
が発生した熱を効率良く筒部２に伝えることができな
い。The first electrode 7 1 PTC thermistor 7, because via the first electrode terminal 6 contacts the cylindrical portion 2, reduces the thermal conductivity of the cylindrical portion 2 positive for the first electrode terminal 6 Characteristic thermistor 7
The generated heat cannot be efficiently transmitted to the tubular portion 2.
そこで、本考案は前述の課題を解決できるようにした正
特性サーミスタを利用した発熱体を提供することを目的
とする。Therefore, an object of the present invention is to provide a heating element using a positive temperature coefficient thermistor capable of solving the above-mentioned problems.
（１）正特性サーミスタの第１・第２電極に接する第１
・第２電極端子を支持片を介してケース、蓋、内筒部の
いずれかで部分的に支持し、第１・第２電極端子とケー
ス、蓋の接触面積を減少して正特性サーミスタが発生し
た熱がケース、蓋にあまり伝熱しないようにした正特性
サーミスタを利用した発熱体である。(1) First contacting the first and second electrodes of the PTC thermistor
・ The second electrode terminal is partially supported by the case, the lid, or the inner cylinder part through the support piece, and the contact area between the first and second electrode terminals and the case, the lid is reduced to improve the positive temperature coefficient thermistor. This is a heating element that uses a positive temperature coefficient thermistor that prevents the generated heat from being transferred to the case and lid so much.
（２）第１電極端子を正特性サーミスタの第１電極の一
部分の圧着する形状とし、放熱部に第１電極端子が臨む
凹み部を形成し、第１電極が部分的に放熱部に接触する
ようにして、放熱部への熱伝導性を向上できるようにし
た性特性サーミスタを利用した発熱体である。(2) The first electrode terminal is formed by crimping a part of the first electrode of the positive temperature coefficient thermistor, and the heat dissipation portion is formed with a recess facing the first electrode terminal so that the first electrode partially contacts the heat dissipation portion. In this way, the heat generating element uses the thermistor having the characteristic characteristics, which can improve the thermal conductivity to the heat radiating portion.
第１図は発熱体の分解斜視図であり、ケース10はフラン
ジ11を有する円板状となり、中心部に上下方向に貫通す
る段付きの取付縦孔12が形成され、その取付縦孔12の内
面に回り止め用突起13が設けられ、ケース10の上面には
取付縦孔12と同心状のリング状突起14が一体的に設けて
あると共に、ケース10の上面には一対の突部15,15がケ
ース中心に対して相対向して一体形成され、該突部15は
ケース中心側の内側切欠部161及びケース外側の外側切
欠凹部162を有する略Ｌ型薄板状で、その内側切欠部161
とリング状突起14との間に第１支持部17を形成し、外側
切欠凹部162により第２支持部18を形成し、さらに、ケ
ース10の上面には電極端子用の第１、第２凹部19,20が
ケース10の中心に対して所定角度となるように放射状に
形成されている。FIG. 1 is an exploded perspective view of a heating element. The case 10 has a disk shape having a flange 11, and a stepped mounting vertical hole 12 is formed at the center thereof so as to vertically penetrate therethrough. A rotation preventing projection 13 is provided on the inner surface, a ring-shaped projection 14 concentric with the mounting vertical hole 12 is integrally provided on the upper surface of the case 10, and a pair of projections 15, 15 is provided on the upper surface of the case 10. 15 are integrally formed facing each other with respect to the center of the case, and the protrusion 15 is a substantially L-shaped thin plate having an inner cutout 16 1 on the case center side and an outer cutout recess 16 2 on the outer side of the case. Part 16 1
The first support portion 17 is formed between the ring-shaped protrusion 14 and the second support portion 18 is formed by an outer cutout recess 16 2 and further, the upper surface of the case 10 first electrode terminal, the second The recesses 19 and 20 are radially formed so as to form a predetermined angle with respect to the center of the case 10.
内筒部21はアルミナ磁器または耐熱性プラスチック等の
熱伝導性の良好な電気絶縁物によって構成され、その内
筒部21は筒体22の外面における上下方向中間部に多面体
部23を一体形成し、筒体22の外面下部が前記ケース10の
取付縦孔12の大径部12aに嵌合されて第３図のように内
径孔21aと取付縦孔12の小径部12bが面一となるようにし
てあり、その筒体22の下部には前記回り止め用突起13に
嵌合する縦溝24が形成されていると共に、筒体22の上端
面には回り止め用凹部25が形成してある。The inner cylinder portion 21 is made of an electrical insulator having good heat conductivity such as alumina porcelain or heat resistant plastic, and the inner cylinder portion 21 has a polyhedron portion 23 integrally formed at an intermediate portion in the vertical direction on the outer surface of the cylinder body 22. The lower part of the outer surface of the cylindrical body 22 is fitted into the large diameter portion 12a of the mounting vertical hole 12 of the case 10 so that the inner diameter hole 21a and the small diameter portion 12b of the mounting vertical hole 12 are flush with each other as shown in FIG. A vertical groove 24 that fits into the anti-rotation projection 13 is formed in the lower portion of the tubular body 22, and a whirl-stop recess 25 is formed in the upper end surface of the tubular body 22. .
放熱筒体26はアルミニウム等の熱伝導性の良好な物より
成り、その下部周縁にはフランジ27が一体形成され、前
記内筒部21の内径孔21a、つまり筒体22の内面に第３図
に示すように密嵌されてフランジ27がケース10の下部に
当接している。The heat radiating cylinder 26 is made of a material having good heat conductivity such as aluminum, a flange 27 is integrally formed on the lower peripheral edge thereof, and the inner diameter portion 21a of the inner cylinder portion 21, that is, the inner surface of the cylinder body 22 is shown in FIG. The flange 27 is tightly fitted as shown in FIG.
蓋28は周壁29と上壁30とにより有蓋筒状となり、上壁30
の中心には孔31が形成され、上壁30の内面にはリング状
突起32が前記孔31の周囲に一体形成され、上壁30の内面
には一対の突部33,33が上壁中心に対して相対向してそ
れぞれ一体形成されて、該突部33は上壁中心側の内側切
欠部341と上壁外側の切欠部342を有する略Ｌ型薄板状と
なり、その内側切欠部341とリング状突起32との間に第
１支持部35を形成し、外側切欠凹部342が第２支持部36
を形成し、前記周壁29の下部は第３図のように前記ケー
ス10のフランジ11に載置して嵌合する段付形状となり、
一対の第１・第２突片37,38が孔31の中心に対して所定
角度となるように形成され、さらに複数の保持部39が放
射状に一体形成してあり、前記上壁30の内面には回り止
め突起40が下向きに一体形成され、この突起40が前記内
筒部21の回り止め凹部25に嵌合して蓋28と内筒部21が回
転しないようにして位置決めされるので、ケース10と蓋
28は周方向に位置決めされ、各第１支持部17,35及び第
２支持部18,36が相対向するようにしてある。The lid 28 has a cylindrical shape with a peripheral wall 29 and an upper wall 30.
A hole 31 is formed in the center of the upper wall 30, a ring-shaped projection 32 is integrally formed on the inner surface of the upper wall 30 around the hole 31, and a pair of protrusions 33, 33 is formed on the inner surface of the upper wall 30 in the center of the upper wall. The projections 33 are integrally formed so as to face each other with respect to each other, and have a substantially L-shaped thin plate shape having an inner cutout 34 1 on the center side of the upper wall and a cutout 34 2 on the outer side of the upper wall. A first support portion 35 is formed between 34 1 and the ring-shaped projection 32, and the outer cutout recess 34 2 is formed into the second support portion 36.
And the lower portion of the peripheral wall 29 has a stepped shape to be placed and fitted on the flange 11 of the case 10 as shown in FIG.
A pair of first and second projecting pieces 37, 38 are formed at a predetermined angle with respect to the center of the hole 31, and a plurality of holding portions 39 are radially integrally formed, and the inner surface of the upper wall 30 is formed. A rotation-stop projection 40 is integrally formed downward on this, and since the projection 40 is fitted in the rotation-stop recess 25 of the inner cylinder portion 21 and positioned so that the lid 28 and the inner cylinder portion 21 do not rotate, Case 10 and lid
28 is positioned in the circumferential direction so that the first support portions 17, 35 and the second support portions 18, 36 face each other.
正特性サーミスタ41は板厚方向の両面に第１電極42と第
２電極43を設けた円形の平板状となり、第３図に示すよ
うに内筒部21の多面体部23における相対向した一対の平
面23a,23aと第１電極42が対向するように配設される。The positive temperature coefficient thermistor 41 has a circular flat plate shape in which the first electrode 42 and the second electrode 43 are provided on both sides in the plate thickness direction, and as shown in FIG. 3, a pair of opposed polyhedral parts 23 of the inner tubular part 21 face each other. The planes 23a, 23a and the first electrode 42 are arranged so as to face each other.
第１電極端子44は、例えばステンレス薄板等のバネ性に
富む導電材料の縦板を平面コ字状に折曲して相対した第
１、第２縦片45,46と連結縦片47を備え、その第１・第
２縦片45,46の先端側における内面が平面状の内筒部接
触面48,49となり、外面が平面状の電極接触面50,51とな
り、第１・第２縦片45,46の先端側上下端面には上支持
片52と下支持片53が上下に向けてそれぞれ一体形成さ
れ、さらに電極接触面50,51を囲むように外向折曲片54
が複数一体形成してあり、前記連結縦片47には端子47a
が設けてある。The first electrode terminal 44 is provided with first and second vertical pieces 45, 46 and a connecting vertical piece 47 which are opposed to each other by bending a vertical plate made of a conductive material having a high spring property such as a stainless steel thin plate into a planar U-shape. , The inner surfaces of the first and second vertical pieces 45, 46 on the tip side are flat inner cylindrical contact surfaces 48, 49, and the outer surfaces are flat electrode contact surfaces 50, 51. An upper support piece 52 and a lower support piece 53 are integrally formed on the upper and lower end surfaces on the tip side of the pieces 45 and 46 so as to extend vertically, and the outward bending piece 54 surrounds the electrode contact surfaces 50 and 51.
Are integrally formed, and the connecting vertical piece 47 has a terminal 47a.
Is provided.
第２電極端子55は、例えばステンレス溝板等のバネ性に
富む導電材料の縦板を平面略コ字状に折曲して相対向し
た第１・第２縦片56,57と連結縦片58を備え、第１・第
２縦片56,57の先端側上下端面には上支持片59と下支持
片60が上下に向けてそれぞれ一体形成され、さらに第１
・第２縦片56,57の先端側一部分が切り起し弯曲されて
電極押え片61をそれぞれ形成してあり、連結縦片58に端
子58aが設けてある。The second electrode terminal 55 is formed by bending a vertical plate made of a conductive material having a high spring property such as a stainless groove plate into a substantially U-shape in a plane and connecting the first and second vertical pieces 56, 57 and the connecting vertical piece. An upper support piece 59 and a lower support piece 60 are formed integrally on the upper and lower end surfaces of the first and second vertical pieces 56, 57 on the tip side, respectively.
Part of the second vertical pieces 56, 57 on the tip side is cut and bent to form an electrode pressing piece 61, and the connecting vertical piece 58 is provided with a terminal 58a.
そして、第１電極端子44の下支持片53を第４図、第５図
のようにケース10の第１支持部17にそれぞれ嵌着してケ
ース10に第１電極端子44を取付け、これによって第１・
第２縦片45,46の内筒部接触面48,49が内筒部21の一対の
平面23a,23aに接触し、端子47aが第１凹部19より突出す
る。Then, the lower support piece 53 of the first electrode terminal 44 is fitted to the first support portion 17 of the case 10 as shown in FIGS. 4 and 5, and the first electrode terminal 44 is attached to the case 10. 1st
The inner cylindrical portion contact surfaces 48, 49 of the second vertical pieces 45, 46 contact the pair of flat surfaces 23a, 23a of the inner cylindrical portion 21, and the terminal 47a projects from the first recess 19.
第２電極端子55の下支持片60を第４図、第５図のように
ケース10の第２支持部18にそれぞれ嵌着してケース10に
第２電極端子55を取付け、これによって端子58aが第２
凹部20より突出する。The lower support piece 60 of the second electrode terminal 55 is fitted to the second support portion 18 of the case 10 as shown in FIGS. 4 and 5, and the second electrode terminal 55 is attached to the case 10, whereby the terminal 58a is formed. Is the second
It projects from the recess 20.
また、正特性サーミスタ41の第１電極42は第１電極端子
44の第１・第２縦片45,46の電極接触面51,51と接触し、
第２電極端子55の第１、第２縦片56,57の電極押え片61
に第２電極43が接触し、その電極押え片61のバネ力で内
筒部21の平面23aと電極接触面50,51及び電極接触面50,5
1と第１電極42が密着する。The first electrode 42 of the positive temperature coefficient thermistor 41 is a first electrode terminal.
44 contacting the electrode contact surfaces 51, 51 of the first and second vertical pieces 45, 46,
Electrode pressing piece 61 of the first and second vertical pieces 56, 57 of the second electrode terminal 55
The second electrode 43 comes into contact with the flat surface 23a of the inner tubular portion 21, the electrode contact surfaces 50, 51, and the electrode contact surfaces 50, 5 due to the spring force of the electrode pressing piece 61.
1 and the first electrode 42 are in close contact with each other.
このように組み付けた後に蓋28をケース10に嵌合して、
第３図のように第１電極端子44の各上支持片52,52を蓋2
8の第１支持部35に嵌着し、第２電極端子55の各上支持
片59,59を蓋28の第２支持部36に嵌着して、第１・第２
電極端子44,55をケース10と蓋28とで挾持し、放熱筒体2
6の蓋28の孔31より突出した上部を蓋28の上壁30にカシ
メて蓋28とケース10を連結して発熱体を組立てる。After assembling in this way, fit the lid 28 to the case 10,
As shown in FIG. 3, cover the upper support pieces 52, 52 of the first electrode terminal 44 with the lid 2
8 is fitted to the first supporting portion 35, and the upper supporting pieces 59, 59 of the second electrode terminal 55 are fitted to the second supporting portion 36 of the lid 28, so that the first and second
Holding the electrode terminals 44 and 55 between the case 10 and the lid 28,
The upper portion of the lid 28 projecting from the hole 31 is crimped to the upper wall 30 of the lid 28 to connect the lid 28 and the case 10 to assemble the heating element.
そして、発熱体は装置本体の所定位置に保持部39を挿通
するビス等で取付ける。Then, the heating element is attached to a predetermined position of the apparatus main body with a screw or the like that inserts the holding portion 39.
このようであるから、第１電極端子44は小さな上下支持
片52,53を介してケース10、蓋28の第１支持部17,35で支
持されて接触面積が小さく、第２電極端子55は小さな上
下支持片59,60を介してケース10、蓋28の第２支持部18,
36で支持されて接触面積が小さく、第１電極端子44及び
第２電極端子55よりケース10、蓋28に伝わる正特性サー
ミスタ41が発生した熱は極く僅かとなり、正特性サーミ
スタ41が発生した熱はほとんど内筒部21を経て放熱筒体
26に伝えられ、熱効率が優れたものとなる。Because of this, the first electrode terminal 44 is supported by the case 10 and the first supporting portions 17, 35 of the lid 28 via the small upper and lower supporting pieces 52, 53, and the contact area is small, and the second electrode terminal 55 is The second support portion 18, of the case 28 and the lid 28, via the small upper and lower support pieces 59, 60.
The positive contact thermistor 41, which is supported by 36 and has a small contact area, is transmitted from the first electrode terminal 44 and the second electrode terminal 55 to the case 10 and the lid 28, and the heat generated by the positive temperature coefficient thermistor 41 is extremely small. Most of the heat goes through the inner tube part 21 and the heat dissipation tube
It is transmitted to 26 and thermal efficiency becomes excellent.
さらには、正特性サーミスタ41は第１・第２電極端子4
4,55で支持されてケース10、蓋28とは接していないか
ら、正特性サーミスタ41が発生した熱がケース10、蓋28
に伝わることがほとんどなく、前述のことと相俟ってケ
ース10、蓋28の温度は低温となり、ケース10、蓋28の耐
熱性、信頼性を向上でき、かつ使用耐熱部材として低
級、低コストの耐熱材料が使用でき、耐熱プラスチック
などの使用が可能となり、発熱体のコストを低減できる
ばかりか、正特性サーミスタ41が発生した熱を大部分放
熱筒体26に伝熱して芯棒の加熱に利用できるので、正特
性サーミスタの発熱量を少なくでき、これによって正特
性サーミスタの大きさを小さくしたり、キューリ温度を
下げることが可能となって正特性サーミスタの耐久性を
向上できる。Furthermore, the positive temperature coefficient thermistor 41 has the first and second electrode terminals 4
Since it is supported by 4,55 and is not in contact with the case 10 and the lid 28, the heat generated by the positive temperature coefficient thermistor 41 is applied to the case 10 and the lid 28.
In addition to the above, the temperature of the case 10 and the lid 28 is low, and the heat resistance and reliability of the case 10 and the lid 28 can be improved. The heat resistant material can be used, and heat resistant plastic can be used, which not only reduces the cost of the heating element, but also transfers the heat generated by the positive temperature coefficient thermistor 41 to most of the heat radiating cylinder 26 to heat the core rod. Since the PTC thermistor can be used, the amount of heat generated by the PTC thermistor can be reduced, whereby the size of the PTC thermistor can be reduced and the Curie temperature can be lowered, and the durability of the PTC thermistor can be improved.
内筒部21、蓋28を位置決めしてケース10に取付けできる
と共に、第１、第２電極端子44,55を位置決めして取付
けでき、組立作業を短時間に誤差なく正確にできる。The inner cylinder portion 21 and the lid 28 can be positioned and attached to the case 10, and the first and second electrode terminals 44 and 55 can be positioned and attached, and the assembling work can be accurately performed in a short time without error.
また、第１電極端子44の端子47aは第６図のように連結
縦片47と連続しかつケース10のリブ11上面に接して弯曲
変形させてあると共に、その弯曲変形部に開口部47bが
形成され、しかもバネ性を有しているから、その弯曲変
形部分47cを境として端子47aが直線状になろうとする復
元力が作用し、過電流が流れた時に第７図のように弯曲
変形部分47cから溶断し易くなって溶断性能が向上す
る。Further, as shown in FIG. 6, the terminal 47a of the first electrode terminal 44 is continuous with the connecting vertical piece 47 and is in contact with the upper surface of the rib 11 of the case 10 to be bent and deformed, and the opening 47b is formed in the bent portion. Since it is formed and has a spring property, the restoring force that the terminal 47a tends to be linear acts on the curved deformation portion 47c as a boundary, and when the overcurrent flows, the curved deformation is generated as shown in FIG. It becomes easier to blow from the portion 47c, and the fusing performance is improved.
次に変形例を説明する。Next, a modified example will be described.
第８図、第９図に示すように、内筒部21の多面体部23平
面23aに横片70と一対の突片71,71を一体形成して、正特
性サーミスタ41を横片70上に載せて一対の突片71,71で
左右の位置決めをするようにし、第２電極端子55の支持
片61を第２突部34に圧接してある。As shown in FIGS. 8 and 9, a horizontal piece 70 and a pair of projecting pieces 71, 71 are integrally formed on the flat surface 23a of the polyhedron portion 23 of the inner tubular portion 21, and the positive temperature coefficient thermistor 41 is placed on the horizontal piece 70. The pair of projecting pieces 71, 71 are positioned for left and right positioning, and the supporting piece 61 of the second electrode terminal 55 is pressed against the second projecting portion 34.
このようにすれば、正特性サーミスタ41の取付けを容易
にできる。In this way, the PTC thermistor 41 can be easily attached.
第10図のように、内筒部21の多面体23平面23a下部に横
向片74を一体形成し、その横向片74の突出端に受け部75
を一体形成し、第１・第２電極端子44,55の下支持片53,
60を横向片74受け部75で支持するようにしてある。As shown in FIG. 10, a horizontal piece 74 is integrally formed on the lower portion of the flat surface 23a of the polyhedron 23 of the inner tubular portion 21, and a receiving portion 75 is formed at the projecting end of the horizontal piece 74.
And the lower support piece 53 of the first and second electrode terminals 44, 55
The horizontal piece 74 is supported by the receiving portion 75.
このようにすれば、内筒部21に第１・第２電極端子44,5
5の下部をセットできるから、組立性が向上する。By doing so, the inner and outer cylindrical portions 21 have the first and second electrode terminals 44,5.
As the lower part of 5 can be set, assembly is improved.
また、保持部39の形状は前記の形状に限るものではな
く、差し込み式、カシメ式等でも良い。Further, the shape of the holding portion 39 is not limited to the above-mentioned shape, and may be a plug-in type or a caulking type.
また、ケース10、蓋28は高分子樹脂等の断熱性、電気絶
縁性で作成できるから、装置本体装着時に揮散孔や通気
流動壁などの断熱部、電気絶縁部となる部分をともに一
体成形することもできる。Further, since the case 10 and the lid 28 can be made of a heat insulating material such as a polymer resin and an electric insulating material, a heat insulating portion such as a volatilization hole and a ventilation flow wall when the device main body is attached, and a portion to be an electric insulating portion are integrally formed You can also
また、正特性サーミスタは２つ以上である事が好ましく
3,4個等の構造も可能である。Further, it is preferable that the number of positive temperature coefficient thermistors is two or more.
A structure of 3, 4, etc. is also possible.
第11図、第12図に示すように、内筒部21の多面体部23平
面23a上部に横向片72を一体形成し、多面体部23の下部
に凹部23bを形成し、第１電極端子44の第１・第２縦片4
5,46の先端部にＬ型の支持部73,73を一体形成し、その
支持片73を突部15と正特性サーミスタ41の第１電極42下
部隅角部に接して支持し、かつ支持片73を前記凹部23b
に臨ませて正特性サーミスタ41の第１電極42の大部分を
前記平面23aに圧着し、正特性サーミスタ41の上部を横
向片72に圧着してある。As shown in FIG. 11 and FIG. 12, a lateral piece 72 is integrally formed on the upper surface of the polyhedral portion 23 flat surface 23a of the inner tubular portion 21, and a concave portion 23b is formed on the lower portion of the polyhedral portion 23, and First and second vertical pieces 4
L-shaped support portions 73, 73 are integrally formed on the tip end portions of 5, 46, and the support pieces 73 are supported in contact with the projection 15 and the lower corner portion of the first electrode 42 of the positive temperature coefficient thermistor 41, and are supported. Put the piece 73 into the recess 23b
Most of the first electrode 42 of the positive temperature coefficient thermistor 41 is pressure bonded to the flat surface 23a, and the upper portion of the positive temperature coefficient thermistor 41 is pressure bonded to the horizontal piece 72.
このようにすれば、正特性サーミスタ41の第１電極42の
大部分が内筒部21の平面23aに圧着するから、正特性サ
ーミスタ41で発生した熱の内筒部21への熱伝導性が向上
し、しかも第２電極43から第２電極端子55に伝わる熱伝
導率に比べ第１電極42から内筒部21へ伝わる熱伝導率の
方がはるかに高いため、正特性サーミスタの発熱量の大
部分が内筒部に伝わり熱効率が著しく向上する。したが
って、正特性サーミスタのキュリー温度を下げても放熱
筒温度を維持でき各部材の耐熱性を向上できる。By doing so, most of the first electrode 42 of the positive temperature coefficient thermistor 41 is pressed against the flat surface 23a of the inner cylindrical portion 21, so that the heat conductivity of the heat generated in the positive temperature coefficient thermistor 41 to the inner cylindrical portion 21 is improved. Since the thermal conductivity transferred from the first electrode 42 to the inner tubular portion 21 is much higher than the thermal conductivity transferred from the second electrode 43 to the second electrode terminal 55, the heat generation amount of the positive temperature coefficient thermistor is improved. Most of the heat is transferred to the inner cylinder, and the thermal efficiency is significantly improved. Therefore, even if the Curie temperature of the positive temperature coefficient thermistor is lowered, the temperature of the heat radiation tube can be maintained and the heat resistance of each member can be improved.
また、第13図，第14図に示すように構成しても良い。ケ
ース10に第１凹陥部80と第２凹陥部81を形成し、第１凹
陥部80の底部に縦孔82を形成し、第２凹陥部81の底部に
縦孔83を形成し、第１電極端子44を、拡幅な縦片84の上
部に挟幅な横片85を、下部に挟幅な端子86をそれぞれ一
体形成した略Ｌ字状で、上部に支持片87を有する形状と
し、第２電極端子55を弯曲した横片88と端子89とで略Ｌ
字状とし、第２電極端子55を第１凹陥部80内に設けて端
子89を縦孔82よりケース外に突出し、その横片88上に正
特性サーミスタ41の第２電極43を載置し、第２凹陥部81
内に第１電極端子44を設けて端子86を縦孔83よりケース
外に突出させ、かつ縦片84の下面84aを第２凹陥部81の
底部に当接させ、横片85を正特性サーミスタ41の第１電
極42と対向させる。Further, it may be configured as shown in FIGS. 13 and 14. A first recessed portion 80 and a second recessed portion 81 are formed in the case 10, a vertical hole 82 is formed in the bottom portion of the first recessed portion 80, and a vertical hole 83 is formed in the bottom portion of the second recessed portion 81. The electrode terminal 44 is formed in a substantially L shape in which a narrow horizontal piece 85 is integrally formed on an upper portion of a wide vertical piece 84 and a narrow terminal 86 is integrally formed on a lower portion, and a supporting piece 87 is formed on the upper portion. A two-electrode terminal 55 is a curved piece 88 and the terminal 89 is approximately L
The second electrode terminal 55 is provided in the first recess 80 so that the terminal 89 projects from the vertical hole 82 to the outside of the case, and the second electrode 43 of the positive temperature coefficient thermistor 41 is placed on the horizontal piece 88. , The second recess 81
The first electrode terminal 44 is provided inside, the terminal 86 is projected from the vertical hole 83 to the outside of the case, and the lower surface 84a of the vertical piece 84 is brought into contact with the bottom of the second recess 81, and the horizontal piece 85 is fixed to the positive temperature coefficient thermistor. The first electrode 42 of 41 is opposed.
ケース10の上部に熱伝導板90を設けて、その熱伝導板90
の下面に第１電極端子44の上部が臨む凹部91を形成し、
熱伝導板90の上面に放熱板92を設け、その放熱板92の係
止縦片93をケース10にカシメてある。The heat conduction plate 90 is installed on the top of the case 10 and the heat conduction plate 90
A concave portion 91 facing the upper portion of the first electrode terminal 44 is formed on the lower surface of the
The heat dissipation plate 92 is provided on the upper surface of the heat conduction plate 90, and the locking vertical piece 93 of the heat dissipation plate 92 is caulked to the case 10.
このようにすれば、第２電極端子55の横片88の弾性によ
って正特性サーミスタ41が押し上げられて第１電極42と
第１電極端子44の横片85が圧着し、かつその第１電極端
子44の横片85が放熱板92の凹部91内に臨むので、正特性
サーミスタ41の第１電極42における第１電極端子44の横
片85と圧着した部分以外の大部分が熱伝導板90に圧着す
る。By doing so, the PTC thermistor 41 is pushed up by the elasticity of the horizontal piece 88 of the second electrode terminal 55, the first electrode 42 and the horizontal piece 85 of the first electrode terminal 44 are crimped, and the first electrode terminal Since the horizontal piece 85 of 44 faces the recess 91 of the heat dissipation plate 92, most of the portion of the first electrode 42 of the positive temperature coefficient thermistor 41 other than the portion crimped to the horizontal piece 85 of the first electrode terminal 44 is the heat conduction plate 90. Crimp.
また、第１電極端子44をリード線として正特性サーミス
タ41の第１電極42に溶着しても同様な効果が得られる。Also, the same effect can be obtained by welding the first electrode terminal 44 to the first electrode 42 of the positive temperature coefficient thermistor 41 using the lead wire as a lead wire.
以上の第11図〜第14図に示す実施例において、正特性サ
ーミスタ41の第１電極42の材質として、銀、ニッケル等
の軟らで熱伝導性が高い物質を用い、第２電極端子44を
ステンレス材等の第１電極42より硬い材質で且熱伝導性
が低い材質を用いれば、正特性サーミスタ41と内筒部平
面、熱伝導板の微細な凹凸面をシーリングし易く密着性
が向上し、熱伝導性が増加し且安定となり放熱筒、放熱
板の温度のバラツキを減少でき、しかもシリコン樹脂等
の熱伝導性向上用充填剤の使用が可能であるが、その使
用量の減少や無くす事も出来コストを下げる事ができ
る。In the embodiment shown in FIGS. 11 to 14 above, as the material of the first electrode 42 of the positive temperature coefficient thermistor 41, a soft and highly heat-conductive material such as silver or nickel is used, and the second electrode terminal 44 is used. If a material that is harder than the first electrode 42, such as stainless steel, and has low heat conductivity is used, it is easy to seal the positive temperature coefficient thermistor 41, the inner cylinder flat surface, and the fine uneven surface of the heat conductive plate, and the adhesion is improved. However, the thermal conductivity increases and becomes stable, and the variation in the temperature of the heat dissipation tube and the heat dissipation plate can be reduced. Moreover, it is possible to use a filler for improving the heat conductivity such as silicon resin, but the use amount can be reduced. It can be eliminated and the cost can be reduced.
（１）正特性サーミスタ41から発生した熱が第１・第２
電極端子44,55を経てケース10、蓋28に伝わる量が減少
し、その正特性サーミスタ41が発生した熱の大部分を放
熱筒体26に伝熱できるので、熱伝達効率が優れたものと
なって正特性サーミスタ41が発生した熱を芯棒等の加熱
に有効利用できるばかりか、ケース10、蓋28の温度を低
温にできるから電気燻蒸装置に用いた際に装置本体への
熱伝導が低減し装置本体の温度を低くでき、装置本体を
安価な耐熱材料で作成したり、小型としたりできて電気
燻蒸装置を安価にできる。(1) The heat generated from the PTC thermistor 41 is the first and second
The amount transferred to the case 10 and the lid 28 via the electrode terminals 44 and 55 is reduced, and most of the heat generated by the positive temperature coefficient thermistor 41 can be transferred to the heat radiating cylinder 26, so that the heat transfer efficiency is excellent. Not only can the heat generated by the positive temperature coefficient thermistor 41 be effectively used to heat the core rod, but also the temperature of the case 10 and the lid 28 can be lowered, so that heat conduction to the device body when used in an electric fumigation device It is possible to reduce the temperature of the apparatus main body, reduce the temperature of the apparatus main body, make the apparatus main body with an inexpensive heat-resistant material, or downsize it, thereby making the electric fumigation apparatus inexpensive.
（２）第１電極端子44における正特性サーミスタ41の第
１電極42と接触する部分が放熱部の接触面に形成した凹
み部に臨み、その第１電極42の第１電極端子44と接触す
る以外の部分が放熱部に直接接触するから、正特性サー
ミスタ41から放熱部への熱伝導性を向上でき、正特性サ
ーミスタ41が発生した熱を効率良く放熱部に伝えること
ができる。(2) The portion of the first electrode terminal 44 in contact with the first electrode 42 of the positive temperature coefficient thermistor 41 faces the recess formed on the contact surface of the heat dissipation portion and contacts the first electrode terminal 44 of the first electrode 42. Since the other parts are in direct contact with the heat dissipation part, the thermal conductivity from the positive temperature coefficient thermistor 41 to the heat dissipation part can be improved, and the heat generated by the positive temperature coefficient thermistor 41 can be efficiently transmitted to the heat dissipation part.
第１図〜第７図は本考案の実施例を示し、第１図は発熱
体の分解斜視図、第２図は組立状態の斜視図、第３図は
第２図のＡ−Ａ線断面図、第４図は蓋を外した状態の平
面図、第５図は第４図の正面図、第６図は第４図のVI-V
I線断面図、第７図は端子溶断時の説明図、第８図、第
９図は第２実施例の断面図、内筒部斜視図、第10図は第
３実施例の断面図、第11図、第12図は第４実施例の断面
図、第１電極端子の斜視図、第13図、第14図は第５実施
例の分解斜視図、組立状態断面図、第15図は従来例の平
面図である。 10はケース、21は内筒部、26は放熱筒体、28は蓋、41は
正特性サーミスタ、44,55は第１・第２電極端子。1 to 7 show an embodiment of the present invention, FIG. 1 is an exploded perspective view of a heating element, FIG. 2 is a perspective view of an assembled state, and FIG. 3 is a sectional view taken along line AA of FIG. Fig. 4 is a plan view with the lid removed, Fig. 5 is a front view of Fig. 4, and Fig. 6 is VI-V of Fig. 4.
A sectional view taken along the line I, FIG. 7 is an explanatory view at the time of melting the terminal, FIGS. 8 and 9 are sectional views of the second embodiment, an inner cylindrical portion perspective view, and FIG. 10 are sectional views of the third embodiment, FIGS. 11 and 12 are sectional views of the fourth embodiment, perspective views of the first electrode terminal, FIGS. 13 and 14 are exploded perspective views of the fifth embodiment, sectional views in an assembled state, and FIG. It is a top view of a prior art example. 10 is a case, 21 is an inner cylinder part, 26 is a heat dissipation cylinder, 28 is a lid, 41 is a positive temperature coefficient thermistor, and 44 and 55 are first and second electrode terminals.
Claims (3)
付け、この内筒部21内に放熱筒体26を密嵌し、前記内筒
部21の外周面に平板状の正特性サーミスタ41を設け、こ
の正特性サーミスタ41の第１電極42と接する第１電極端
子44に支持片を設け、第２電極43と接する第２電極端子
55に支持片を設け、その各支持片をケース10、蓋体28、
内筒部21のいずれかで支持したことを特徴とする正特性
サーミスタを利用した発熱体。1. An inner cylinder portion 21 is attached across a case 10 and a lid body 28, a heat radiating cylinder body 26 is tightly fitted in the inner cylinder portion 21, and a flat plate-shaped outer peripheral surface of the inner cylinder portion 21. A PTC thermistor 41 is provided, and a supporting piece is provided on a first electrode terminal 44 of the PTC thermistor 41 which is in contact with the first electrode 42, and a second electrode terminal is in contact with the second electrode 43.
55 is provided with a support piece, and each support piece is attached to the case 10, the lid 28,
A heating element using a positive temperature coefficient thermistor, which is supported by one of the inner cylinder portions 21.
形成し、第２電極端子55に上下支持片59,60を一体形成
し、ケース10には第１、第２支持部17,18を前記下支持
片53,60と対向して形成し、蓋28に第１・第２支持部35,
36を前記上支持片52,59と対向して形成し、各支持片を
各支持部にそれぞれ嵌着して第１・第２電極端子44,55
をケース10と蓋28で支持した請求項１記載の正特性サー
ミスタを利用した発熱体。2. The upper and lower support pieces 52, 53 are integrally formed on the first electrode terminal 44, the upper and lower support pieces 59, 60 are integrally formed on the second electrode terminal 55, and the case 10 has first and second support portions. 17, 18 are formed to face the lower support pieces 53, 60, and the lid 28 is provided with first and second support portions 35,
36 is formed so as to face the upper support pieces 52 and 59, and the respective support pieces are fitted into the respective support portions to form first and second electrode terminals 44 and 55.
The heating element using the positive temperature coefficient thermistor according to claim 1, wherein the case 10 and the lid 28 are supported.
極43に第１電極端子44と第２電極端子55を圧着して正特
性サーミスタ41を発熱させ、その正特性サーミスタ41の
第１電極42を放熱部に圧着させる正特性サーミスタを利
用した発熱体において、 前記第１電極端子44を、正特性サーミスタ41の第１電極
42の一部分に圧着する形状とし、前記放熱部における正
特性サーミスタ41の第１電極42と接触する面に、前記第
１電極端子44が臨む凹み部を形成したことを特徴とする
正特性サーミスタを利用した発熱体。3. The positive characteristic thermistor 41 is heated by pressing the first electrode terminal 44 and the second electrode terminal 55 to the first electrode 42 and the second electrode 43 of the positive characteristic thermistor 41 to heat the positive characteristic thermistor 41. In a heating element using a positive temperature coefficient thermistor in which the first electrode 42 is pressure-bonded to a heat radiating portion, the first electrode terminal 44 is connected to the first electrode of the positive temperature coefficient thermistor 41.
A positive temperature coefficient thermistor characterized in that it is crimped to a portion of 42, and a concave portion facing the first electrode terminal 44 is formed on the surface of the positive temperature coefficient thermistor 41 in the heat dissipation portion that contacts the first electrode 42. The heating element used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8565589U JPH071751Y2 (en) | 1989-07-24 | 1989-07-24 | Heating element using positive temperature coefficient thermistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8565589U JPH071751Y2 (en) | 1989-07-24 | 1989-07-24 | Heating element using positive temperature coefficient thermistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0326093U JPH0326093U (en) | 1991-03-18 |
| JPH071751Y2 true JPH071751Y2 (en) | 1995-01-18 |
Family
ID=31634901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8565589U Expired - Fee Related JPH071751Y2 (en) | 1989-07-24 | 1989-07-24 | Heating element using positive temperature coefficient thermistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071751Y2 (en) |
-
1989
- 1989-07-24 JP JP8565589U patent/JPH071751Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0326093U (en) | 1991-03-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |