JPH07107869B2 - Heating device - Google Patents
Heating deviceInfo
- Publication number
- JPH07107869B2 JPH07107869B2 JP61015319A JP1531986A JPH07107869B2 JP H07107869 B2 JPH07107869 B2 JP H07107869B2 JP 61015319 A JP61015319 A JP 61015319A JP 1531986 A JP1531986 A JP 1531986A JP H07107869 B2 JPH07107869 B2 JP H07107869B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- heat generating
- generating device
- item
- radiator
- 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 - Lifetime
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- Resistance Heating (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、例えば複写機用ヒータ、液体加熱ヒータ等に
使用される発熱装置に関し、正特性サーミスタを発熱源
として有する発熱部を、放熱体の空洞部内に挿入した発
熱装置において、放熱体に可圧縮部を設け、この可圧縮
部を圧縮変形させて空洞部内面を発熱部の放熱面に密着
させると共に、放熱体の一部に被加熱体の形状に適合し
た熱結合面を設けることにより、被加熱体の形状如何に
拘わらず、熱結合性を良好に保ち、熱レスポンスを向上
させ、組立作業を容易化できるようにしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat generating device used in, for example, a heater for a copying machine, a liquid heating heater, or the like, and has a heat generating portion having a positive temperature coefficient thermistor as a heat source and a cavity of a radiator. In the heat generating device inserted in the part, the heat sink is provided with a compressible part, and the compressible part is compressed and deformed to bring the inner surface of the cavity into close contact with the heat dissipating surface of the heat generating part. By providing a heat-bonding surface conforming to the shape, the heat-bonding property is kept good, the heat response is improved, and the assembling work is facilitated regardless of the shape of the object to be heated.
従来の技術 従来のこの種の発熱装置としては、実願昭50−7817号に
記載されたものが知られている。第８図は従来の発熱装
置の分解斜視図、第９図は同じくその組立正面断面図、
第10図は第９図A2−A2線上における断面図である。この
従来例では、平板状に形成された正特性サーミスタ１
を、引出し突起2a、3aを有する電極板２、３の間に挟
み、マイカ板等の絶縁板４、５を介して、円弧状の折曲
部分6a、7aを有する弾性の伝熱体６、７の平坦部6b、7b
を密着させ、かつ、伝熱体６、７の両端をハトメ、リベ
ット等の止具８を用いて支持体９、10に固定すると共
に、これらを熱伝導性の良好な材料、例えばアルミニュ
ウム等でなる円弧状の放熱体11内に圧入させるようにし
てある。2. Description of the Related Art As a conventional heat generating device of this type, one described in Japanese Utility Model Application No. 50-7817 is known. FIG. 8 is an exploded perspective view of a conventional heat generating device, and FIG. 9 is an assembled front sectional view of the same,
FIG. 10 is a sectional view taken along the line A 2 -A 2 in FIG. In this conventional example, the positive temperature coefficient thermistor 1 formed in a flat plate shape
Is sandwiched between electrode plates 2 and 3 having lead-out projections 2a and 3a, and elastic heat transfer members 6 having arc-shaped bent portions 6a and 7a are interposed via insulating plates 4 and 5 such as mica plates, 7 flats 6b, 7b
And the both ends of the heat transfer members 6 and 7 are fixed to the support members 9 and 10 using fasteners 8 such as eyelets and rivets, and these are made of a material having good heat conductivity, such as aluminum. It is adapted to be press-fitted into the arc-shaped radiator 11.
組立状態では、伝熱体６、７の円弧状の折曲部分部分6
a、7aが自己の収縮時弾発力によって放熱体11の内壁面
に圧接すると同時に、前記弾発力によって電極板２−３
間に正特性サーミスタ１が圧支される。In the assembled state, the arc-shaped bent portions 6 of the heat transfer members 6 and 7
At the same time, a and 7a come into pressure contact with the inner wall surface of the radiator 11 by the elastic force when they contract, and at the same time, the electrode plate 2-3 by the elastic force.
The positive temperature coefficient thermistor 1 is supported between them.
発明が解決しようとする問題点 しかしながら、上述した従来の発熱装置には次のような
問題点があった。Problems to be Solved by the Invention However, the above-described conventional heat generating device has the following problems.
（イ）正特性サーミスタ１に発生した熱が、電極板２ま
たは３から伝熱体６、７を経由して最後に放熱体11の内
面に伝達される熱伝導経路を取るため、電源を投入して
から、放熱体11の外表面が所定の温度まで上昇するまで
に要する時間が長くなる。即ち、熱レスポンスが良くな
い。(B) Power is turned on because the heat generated in the positive temperature coefficient thermistor 1 takes a heat conduction path from the electrode plate 2 or 3 to the inner surface of the radiator 11 via the heat conductors 6 and 7 and finally. After that, the time required for the outer surface of the radiator 11 to rise to a predetermined temperature becomes long. That is, the thermal response is not good.
（ロ）発熱部分を放熱体11の内部に挿入する場合、伝熱
体６、７の円弧状折曲部分部6a、7aを強制的に縮小せし
めつつ、放熱体11の一端部から挿入しなければならない
ため、伝熱体６、７の円弧状折曲部分部6a、7aの外周面
と、放熱体11の内周面が互いに圧接して擦れ合い、両面
に擦傷を生じ、品質及び信頼性が低下する。また、擦傷
による切粉が接触界面に介入して熱伝導性を悪化させ
る。(B) When inserting the heat generating portion into the radiator 11, the heat-conducting bodies 6 and 7 must be inserted from one end of the radiator 11 while forcibly reducing the arcuate bent portions 6a and 7a. Since it has to be performed, the outer peripheral surfaces of the arc-shaped bent portions 6a, 7a of the heat transfer members 6, 7 and the inner peripheral surface of the heat radiator 11 are pressed against each other and rub against each other, resulting in scratches on both surfaces, resulting in quality and reliability. Is reduced. In addition, the chips due to scratches intervene at the contact interface and deteriorate the thermal conductivity.
（ハ）伝熱体６、７と放熱体11の長さが長くなる程、両
者間に発生する摩擦力が大きくなり、複写機の熱ロール
装置等のように長尺のものを実現することが困難であ
る。(C) As the lengths of the heat transfer bodies 6 and 7 and the heat dissipating body 11 become longer, the frictional force generated between them becomes larger, and a long one such as a heat roll device of a copying machine is realized. Is difficult.
（ニ）伝熱体６、７と放熱体11との接触面にグリース
や、樹脂等のヒートシンカ層を介在させて両者間の熱伝
導性を高めようとしても、ヒートシンカ層が放熱体11内
に伝熱体６、７を挿入するときに削り取られてしまうた
め、ヒートシンカ層による熱伝導の向上を図ることがで
きない。(D) Even if an attempt is made to increase the thermal conductivity between the heat transfer bodies 6 and 7 and the heat dissipation body 11 by interposing a heat sinker layer such as grease or resin on the contact surface between the heat transfer bodies 6 and 7 and the heat dissipation body 11, the heat sinker layer will be formed inside the heat dissipation body 11. Since the heat transfer members 6 and 7 are scraped off when they are inserted, the heat conduction by the heat sinker layer cannot be improved.
（ホ）上記諸欠点の影響を少なくするためには、伝熱体
６、７の円弧状折曲部分部6a、7aの半径を放熱体11の内
径とほぼ等しくすればよいが、そうすると、伝熱体６、
７と放熱体11との間の熱接触が弱くなり、熱伝導性が悪
くなる。(E) In order to reduce the effects of the above-mentioned various defects, the radius of the arc-shaped bent portions 6a, 7a of the heat transfer members 6, 7 may be set to be substantially equal to the inner diameter of the heat radiator 11. Heat body 6,
The thermal contact between 7 and the radiator 11 becomes weak and the thermal conductivity deteriorates.
（ヘ）円筒状の放熱体11に適合できる被加熱体にのみ、
用途が限定され、応用範囲が狭い。(F) Only for objects to be heated that are compatible with the cylindrical radiator 11.
Limited use and narrow range of application.
問題点を解決するための手段 上述する従来の問題点を解決するため、本発明は、正特
性サーミスタを発熱源として有する発熱部を、筒状放熱
体の空洞部内に絶縁して挿入した発熱装置において、前
記放熱体は、前記空洞部の相対向する両側に、長さ方向
に延びる一対の可圧縮部を有し、前記可圧縮部を圧縮変
形させて前記空洞部内面を前記発熱部の放熱面に密着さ
せると共に、一部に、被加熱体の形状に適合した熱結合
面を有するものでなることを特徴とする。Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention provides a heat generating device in which a heat generating portion having a positive temperature coefficient thermistor as a heat source is insulated and inserted into a hollow portion of a cylindrical radiator. In the above, the heat radiator has a pair of compressible portions extending in the length direction on opposite sides of the hollow portion, and the compressible portion is compressed and deformed so that the inner surface of the hollow portion dissipates heat from the heat generating portion. It is characterized in that it is in close contact with the surface and partly has a heat coupling surface adapted to the shape of the object to be heated.
作用 本発明に係る発熱装置は、正特性サーミスタを発熱源と
して有する発熱部を、放熱体の空洞部内に絶縁して挿入
した発熱装置において、前記放熱体は、可圧縮部を有
し、前記可圧縮部を圧縮変形させて前記空洞部内面を前
記発熱部の放熱面に密着させるものであるから、発熱部
と放熱体の熱結合が密になると同時に、発熱部に発生し
た熱が放熱体に対して直接的に伝わるようになり、熱レ
スポンスが従来より著しく速くなる。The heat generating device according to the present invention is a heat generating device in which a heat generating part having a positive temperature coefficient thermistor as a heat generating source is insulated and inserted into a cavity of a heat radiator, wherein the heat radiator has a compressible part, and Since the compression portion is deformed by compression so that the inner surface of the hollow portion is brought into close contact with the heat radiation surface of the heat generating portion, the heat generation portion and the heat radiator are tightly thermally coupled, and at the same time, the heat generated in the heat generating portion is transmitted to the heat radiator. It will be transmitted directly to it, and the thermal response will be significantly faster than before.
しかも、組立に当って、発熱部の厚みを、一対の平面部
の間隔より小さい値に選定して、放熱体の空洞部内に容
易に挿入できるようになり、組立作業が簡単になる。In addition, upon assembling, the thickness of the heat generating portion can be selected to be smaller than the distance between the pair of flat portions, and the heat generating portion can be easily inserted into the cavity of the heat radiator, which simplifies the assembling work.
更に、放熱体は、一部に、被加熱体の形状に適合した熱
結合面を有するものでなるから、被加熱体の形状がどの
ような形状であっても、容易に対応できる。Further, since the heat radiating body has, in part, a heat coupling surface adapted to the shape of the object to be heated, it can easily cope with any shape of the object to be heated.
実施例 第１図は本発明に係る発熱装置の正面断面図、第２図は
第１図A1−A1線上における拡大断面図である。図におい
て、12は発熱源となる正特性サーミスタ、13、14は一対
の電極板、15は間隔規制部材、16は正特性サーミスタ1
2、電極板13、14及び間隔規制部材15でなる組立体の全
体を被覆する耐熱性絶縁体である。EXAMPLE FIG. 1 is a front sectional view of a heat generating device according to the present invention, and FIG. 2 is an enlarged sectional view taken along the line A 1 -A 1 in FIG. In the figure, 12 is a positive temperature coefficient thermistor serving as a heat source, 13 and 14 are a pair of electrode plates, 15 is an interval regulating member, and 16 is a positive temperature coefficient thermistor 1.
2. A heat-resistant insulator that covers the entire assembly of the electrode plates 13 and 14 and the gap regulating member 15.
正特性サーミスタ12は複数個備えられている。各正特性
サーミスタ12は厚み方向の両面に電極12a,12bを形成し
た平板状となっており、耐熱絶縁部材でなる間隔規制部
材15を挟んで一列に配列してある。電極板13、14は各正
特性サーミスタ12の電極12a,12bに面接触するようにし
て、厚み方向の両面側に配置されている。そして、正特
性サーミスタ12、電極板13、14及び間隔規制部材15でな
る組立体の全体を耐熱性絶縁体16で被覆することによ
り、発熱部Ａを形成してある。この実施例では、耐熱性
絶縁体16は耐熱絶縁チューブによって形成し、正特性サ
ーミスタ12、電極板13、14及び間隔規制部材15でなる組
立体の全体を包むようにして被覆してある。ただし、絶
縁チューブの代りに板状の絶縁体を使用することも可能
である。A plurality of positive temperature coefficient thermistors 12 are provided. Each of the positive temperature coefficient thermistors 12 has a flat plate shape in which electrodes 12a and 12b are formed on both surfaces in the thickness direction, and they are arranged in a line with a space regulating member 15 made of a heat resistant insulating member interposed therebetween. The electrode plates 13 and 14 are arranged on both sides in the thickness direction so as to make surface contact with the electrodes 12a and 12b of each PTC thermistor 12. The heat generating portion A is formed by covering the entire assembly of the positive temperature coefficient thermistor 12, the electrode plates 13 and 14, and the interval regulating member 15 with the heat resistant insulator 16. In this embodiment, the heat resistant insulator 16 is formed of a heat resistant insulating tube, and is covered so as to wrap the entire assembly of the positive temperature coefficient thermistor 12, the electrode plates 13 and 14 and the interval regulating member 15. However, it is also possible to use a plate-shaped insulator instead of the insulating tube.
18、19は発熱部Ａの放熱面（イ）、（ロ）側に重ねられ
た絶縁板、20は絶縁板18の上に配置されたバネ板であ
る。これらは省略することも可能である。Reference numerals 18 and 19 denote insulating plates stacked on the heat radiating surfaces (a) and (b) of the heat generating portion A, and 20 denotes a spring plate disposed on the insulating plate 18. These can be omitted.
21は放熱体である。この放熱体21は、例えばアルミニュ
ウム等の熱伝導性の良好な材料を用いて、長さ方向に向
う空洞部21aを有する筒状に形成してあり、空洞部21a内
に耐熱性絶縁体16によって被覆して絶縁処理した発熱部
Ａを挿入してある。21 is a radiator. The heat radiator 21 is formed of a material having good thermal conductivity such as aluminum, for example, and is formed into a tubular shape having a cavity portion 21a oriented in the length direction, and the heat resistant insulator 16 is provided in the cavity portion 21a. The heat generating portion A which is covered and insulated is inserted.
放熱体21は、空洞部21aの相対向する両側に、適当な幅
で長さ方向に延びる一対の可圧縮部21b、21cを設けると
共に、空洞部21aにおける可圧縮部21b−21c間の上下内
面に、間隔D1をおいて対向する一対の平面部21d、21eを
形成したものでなる。可圧縮部21b、21cは、筒部の両側
に適当な幅で長さ方向に形成された薄肉部分でなり、こ
の薄肉部分を内側に向かって屈曲させて形成されてい
る。可圧縮部21b、21cは、筒部の外側または内側の屈曲
部分に長さ方向に延びる溝21fを有する。The radiator 21 is provided with a pair of compressible portions 21b and 21c extending in the length direction with appropriate widths on opposite sides of the cavity portion 21a, and upper and lower inner surfaces between the compressible portions 21b-21c in the cavity portion 21a. In addition, a pair of flat surface portions 21d and 21e facing each other at a distance D 1 are formed. The compressible portions 21b and 21c are thin-walled portions formed on both sides of the tubular portion with appropriate widths in the lengthwise direction, and the thin-walled portions are bent inward. The compressible portions 21b and 21c have a groove 21f extending in the lengthwise direction at a bent portion outside or inside the tubular portion.
空洞部21aの内部に挿入された発熱部Ａの固定に当って
は、可圧縮部21b、21cを、第２図において上下方向に圧
縮変形させて、発熱部Ａの放熱面（イ）、（ロ）側を、
絶縁板18、19、バネ板20を介して、平面部21d、21eに密
着させてある。従って、発熱部Ａと筒状放熱体21の熱結
合が密になると同時に、発熱部Ａに発生した熱が放熱体
21に対して直接的に伝わるようになる。このため、熱レ
スポンスが従来より著しく速くなる。In fixing the heat generating portion A inserted inside the cavity 21a, the compressible portions 21b and 21c are vertically compressed and deformed in FIG. 2 to dissipate the heat radiating surface (a) of the heat generating portion A, ( B) side,
The flat plates 21d and 21e are in close contact with each other through the insulating plates 18 and 19 and the spring plate 20. Therefore, at the same time as the heat coupling between the heat generating portion A and the cylindrical heat radiating body 21 becomes tight, the heat generated in the heat generating portion A becomes
It will be directly transmitted to 21. For this reason, the thermal response becomes significantly faster than before.
上述のような組立構造を得るためには、第３図に示すよ
うに、放熱体21の空洞部21aの高さH1及び幅W1を、絶縁
板18、19及びバネ板20を含めた発熱部Ａの全体の厚さ
H2、幅W2より大きい値に選定しておき、空洞部21a内に
発熱部Ａを挿入した後、上下方向a,bの加圧力を加え
る。すると、可圧縮部21b、21cが圧縮変形されて、空洞
部21aの平面部21d−21e間の高さH1が高さD1（第２図参
照）に縮小されると同時に、幅W1も発熱部Ａの幅W2と略
等しい幅まで縮小される。この結果、平面部21d、21e
が、絶縁板18、19及びバネ板20を介して、発熱部Ａの放
熱面（イ）、（ロ）に密着すると同時に、その側面に可
圧縮部21aの内壁面が密着し、第２図に示すような構造
の発熱装置が得られる。従って、放熱体21に対して発熱
部Ａの組込む場合、擦れ合いによる擦傷を生じることな
く、擦傷による切粉が接触界面に介入して熱伝導性を悪
化させる等の問題もなくなる。また、放熱体21に発熱部
Ａを挿入する際に、両者間には摩擦が殆ど発生しないか
ら、複写機の熱ロール装置等のように長尺で大電力のも
のでもあっても、容易に実現できる。In order to obtain the above-mentioned assembly structure, as shown in FIG. 3, the height H 1 and the width W 1 of the cavity 21a of the radiator 21 are set so as to include the insulating plates 18 and 19 and the spring plate 20. Overall thickness of heat generating part A
A value larger than H 2 and width W 2 is selected, and after the heat generating portion A is inserted into the hollow portion 21a, a pressing force is applied in the vertical directions a and b. Then, the compressible portions 21b and 21c are compressed and deformed, and the height H 1 between the flat portions 21d-21e of the cavity 21a is reduced to the height D 1 (see FIG. 2), and at the same time, the width W 1 Is reduced to a width substantially equal to the width W 2 of the heat generating portion A. As a result, the flat portions 21d and 21e
Through the insulating plates 18 and 19 and the spring plate 20, the heat-dissipating surfaces (a) and (b) of the heat-generating part A are in close contact, and at the same time, the inner wall surface of the compressible part 21a is in close contact with the side surfaces thereof. A heat generating device having a structure as shown in is obtained. Therefore, when the heat generating portion A is incorporated in the heat radiator 21, there is no problem that scratches due to rubbing do not occur and chips due to the scratches interfere with the contact interface to deteriorate the thermal conductivity. Further, when the heat generating portion A is inserted into the radiator 21, almost no friction is generated between the two, so that even if it is long and has high power, such as a heat roll device of a copying machine, it can be easily performed. realizable.
更に、放熱体21と発熱部Ａとの接触面にグリースや、樹
脂等のヒートシンカ層を介在させて、両者間の熱伝導性
を高めることも可能である。Further, a heat sinker layer such as grease or resin may be interposed on the contact surface between the radiator 21 and the heat generating portion A to enhance the thermal conductivity between them.
この実施例では、可圧縮部21b、21cの屈曲部分に長さ方
向に延びる溝21fを形成してあるので、加圧力を加えた
場合、これらの溝21fの部分で、可圧縮部21b、21cが簡
単に圧縮変形する。従って、可圧縮部21b、21cの加圧変
形が容易である。In this embodiment, since the grooves 21f extending in the lengthwise direction are formed in the bent portions of the compressible portions 21b, 21c, when a pressing force is applied, the compressible portions 21b, 21c are formed at these groove 21f portions. Can be easily compressed and deformed. Therefore, it is easy to deform the compressible portions 21b and 21c under pressure.
また、上記実施例では、可圧縮部21b、21cが内側に屈曲
していて、加熱体21の外側に条状溝が形成される。この
条状溝は、当該発熱装置を被加熱体に装着するときの案
内溝として使用できる。Further, in the above-described embodiment, the compressible portions 21b and 21c are bent inward, and the groove is formed on the outside of the heating body 21. The strip-shaped groove can be used as a guide groove when the heat generating device is mounted on a body to be heated.
放熱体21は、一部に被加熱体の形状に適合した熱結合面
21gを有する。この実施例では、円孔状の熱結合部を持
つ被加熱体を対象とし、これに適合させるため、放熱体
21の外周面を円弧状曲面とし、この外周面を熱結合面21
gとして利用するようになっている。第４図は円孔状の
熱結合部を持つ被加熱体に対して本発明に係る発熱装置
を組込んだ使用状態を示す断面図で、被加熱体22に形成
された円孔23内に本発明に係る発熱装置を挿入し、放熱
体21の熱結合面21gを円孔23の内壁面22aに熱結合させて
ある。The radiator 21 is a heat-bonding surface that partially matches the shape of the object to be heated.
Has 21g. In this embodiment, the object to be heated having a circular hole-like thermal coupling portion is targeted, and in order to adapt to this,
The outer peripheral surface of 21 is an arc-shaped curved surface, and this outer peripheral surface is
It is designed to be used as g. FIG. 4 is a cross-sectional view showing a usage state in which the heating device according to the present invention is incorporated into a heated body having a circular hole-shaped heat coupling portion, and is shown in a circular hole 23 formed in the heated body 22. The heat generating device according to the present invention is inserted, and the heat coupling surface 21g of the radiator 21 is thermally coupled to the inner wall surface 22a of the circular hole 23.
放熱体21の外形状は、主として、被加熱体との関係で定
められるもので、円弧状である必要はない。例えば第５
図に示すように、被加熱体22の熱結合面22aが平面であ
る場合には、平面状の熱結合面21gとする。また、被加
熱体22の熱結合面22aが円形状である場合には、第６図
に示すように、熱結合面21gは外に向かって開く弧状曲
面としたり、或いは第７図に示すように、放熱体21の肉
厚部に孔を形成し、この孔の内面を熱結合面21gとして
もよい。この第７図の実施例は配管内の流体加熱に好適
なものである。The outer shape of the radiator 21 is mainly determined in relation to the object to be heated, and does not have to be arcuate. For example, the fifth
As shown in the figure, when the heat-bonding surface 22a of the object to be heated 22 is a flat surface, the heat-bonding surface 21g is a flat surface. When the heat-bonding surface 22a of the object to be heated 22 is circular, the heat-bonding surface 21g may be an arcuate curved surface that opens outward as shown in FIG. 6, or as shown in FIG. Alternatively, a hole may be formed in the thick portion of the radiator 21, and the inner surface of this hole may be the heat coupling surface 21g. The embodiment shown in FIG. 7 is suitable for heating the fluid in the pipe.
上述のように、放熱体21は、一部に、被加熱体22の形状
に適合した熱結合面21gを有するものでなるから、被加
熱体22の形状がどのような形状であっても、容易に対応
できる。As described above, since the radiator 21 is partially provided with the heat coupling surface 21g adapted to the shape of the object to be heated 22, whatever the shape of the object to be heated 22 is, It can be handled easily.
なお、図示はされていないが、放熱体21の長さ方向の一
端または両端を、耐熱性樹脂等の充填材によって密封す
ると、長さ方向端部からの放熱が抑えられ、熱効率が向
上する。Although not shown, if one or both ends of the radiator 21 in the lengthwise direction are sealed with a filler such as a heat-resistant resin, heat radiation from the lengthwise ends is suppressed, and thermal efficiency is improved.
発明の効果 以上述べたように、本発明に係る発熱装置は、正特性サ
ーミスタを発熱源として有する発熱部を、筒状放熱体の
空洞部内に絶縁して挿入した発熱装置において、前記放
熱体は、前記空洞部の相対向する両側に、長さ方向に延
びる一対の可圧縮部を有し、前記可圧縮部を圧縮変形さ
せて前記空洞部内面を前記発熱部の放熱面に密着させる
と共に、一部に、被加熱体の形状に適合した熱結合面を
有するものでなることを特徴とするから、次のような効
果が得られる。As described above, in the heat generating device according to the present invention, in the heat generating device in which the heat generating portion having the positive temperature coefficient thermistor as a heat source is insulated and inserted in the hollow portion of the cylindrical heat radiator, the heat radiator is , Having a pair of compressible portions extending in the length direction on opposite sides of the hollow portion, and compressing and deforming the compressible portion to bring the inner surface of the hollow portion into close contact with the heat radiation surface of the heat generating portion, Part of the feature is that it has a heat-bonding surface adapted to the shape of the object to be heated, so that the following effects can be obtained.
（ａ）発熱部と放熱体の熱結合が密になると同時に、発
熱部に発生した熱が放熱体に対して直接的に伝わるよう
になり、熱レスポンスが従来より著しく速くなる。(A) At the same time that the heat coupling between the heat generating portion and the heat radiator becomes tight, the heat generated in the heat generating portion is directly transferred to the heat radiator, and the thermal response becomes significantly faster than before.
（ｂ）放熱体に対して発熱部の組込む場合、擦れ合いに
よる擦傷を生じることがなく、擦傷による切粉が接触界
面に介入して熱伝導性を悪化させる等の問題が解決でき
る。(B) When the heat generating part is incorporated in the heat radiator, scratches due to rubbing do not occur, and the problem that chips due to the scratches interfere with the contact interface to deteriorate the thermal conductivity can be solved.
（ｃ）放熱体に発熱部を挿入する際に、両者間には摩擦
が殆ど発生しないから、複写機の熱ロール装置等のよう
に長尺で大電力のものでもあっても、容易に実現でき
る。(C) When inserting the heat-generating part into the radiator, there is almost no friction between them, so it is easily realized even if it is long and has high power, such as a heat roll device of a copying machine. it can.
（ｄ）放熱体は、一部に、被加熱体の形状に適合した熱
結合面を有するものでなるから、被加熱体の形状がどの
ような形状であっても、容易に対応でき、用途が拡大で
きる。(D) Since the heat radiating member has a part of the heat-bonding surface that matches the shape of the object to be heated, it can easily cope with any shape of the object to be heated and can be used. Can be expanded.
第１図は本発明に係る発熱装置の正面断面図、第２図は
第１図A1−A1線上における拡大断面図、第３図は本発明
に係る発熱装置の組立工程を示す図、第４図は被加熱体
に対して本発明に係る発熱装置を組込んだ使用状態を示
す断面図、第５図は同じく別の使用状態を示す断面図、
第６図は同じく更に別の使用状態を示す断面図、第７図
は同じく更に別の使用状態を示す断面図、第８図は従来
の発熱装置の分解斜視図、第９図は同じくその組立正面
断面図、第10図は第９図A2−A2線上における断面図であ
る。 12……正特性サーミスタ 13、14……電極板 21……放熱体 21a……空洞部 21b、21c……可圧縮部 21f……溝、21g……熱結合面 22……被加熱体FIG. 1 is a front sectional view of a heating device according to the present invention, FIG. 2 is an enlarged sectional view taken along the line A 1 -A 1 in FIG. 1, and FIG. 3 is a diagram showing a process for assembling the heating device according to the present invention. FIG. 4 is a cross-sectional view showing a usage state in which a heating device according to the present invention is incorporated into a heated object, and FIG. 5 is a cross-sectional view showing another usage state,
FIG. 6 is a sectional view showing still another usage state, FIG. 7 is a sectional view showing still another usage state, FIG. 8 is an exploded perspective view of a conventional heating device, and FIG. 9 is its assembly. A front sectional view and FIG. 10 are sectional views taken along the line A 2 -A 2 in FIG. 12 …… Positive temperature coefficient thermistor 13, 14 …… Electrode plate 21 …… Heat radiator 21a …… Cavity 21b, 21c …… Compressible part 21f …… Groove, 21g …… Thermal coupling surface 22 …… Heating target
Claims (8)
熱部を、筒状放熱体の空洞部内に絶縁して挿入した発熱
装置において、前記放熱体は、前記空洞部の相対向する
両側に、長さ方向に延びる一対の可圧縮部を有し、この
可圧縮部を圧縮変形させて前記空洞部内面を前記発熱部
の放熱面に密着させると共に、一部に被加熱体の形状に
適合した熱結合面を有するものでなることを特徴とする
発熱装置。1. A heat generating device in which a heat generating portion having a positive temperature coefficient thermistor as a heat source is insulated and inserted into a hollow portion of a cylindrical heat radiating body, wherein the heat radiating body is long on both sides of the hollow portion facing each other. Has a pair of compressible portions extending in the depth direction, and compresses and deforms the compressible portions to bring the inner surface of the cavity into close contact with the heat radiation surface of the heat generating portion, and a part of the heat matching the shape of the object to be heated. A heat generating device having a coupling surface.
でなることを特徴とする特許請求の範囲第１項に記載の
発熱装置。2. The heat generating device according to claim 1, wherein the heat coupling surface is an arcuate curved surface that opens outward.
り、前記熱結合面は円弧状曲面でなることを特徴とする
特許請求の範囲第１項に記載の発熱装置。3. The heat generating device according to claim 1, wherein the radiator has a circular outer peripheral surface, and the heat coupling surface is an arcuate curved surface.
る特許請求の範囲第１項に記載の発熱装置。4. The heat generating device according to claim 1, wherein the heat coupling surface is a flat surface.
れた孔でなることを特徴とする特許請求の範囲第１項に
記載の発熱装置。5. The heat generating device according to claim 1, wherein the heat coupling surface is a hole formed in a thick portion of the radiator.
側において、内側または外側に向って屈曲して形成され
た薄肉部分でなることを特徴とする特許請求の範囲第１
項、第２項、第３項、第４項または第５項に記載の発熱
装置。6. The compressible portion is a thin-walled portion formed by bending toward the inside or the outside on opposite sides of the cavity portion.
The heat generating device according to item (2), item (3), item (4), or item (5).
に延びる溝を有することを特徴とする特許請求の範囲第
６項に記載の発熱装置。7. The heat generating device according to claim 6, wherein the compressible portion has a groove extending in the longitudinal direction at the bent portion.
を特徴とする特許請求の範囲第１項、第２項、第３項、
第４項、第５項、第６項または第７項に記載の発熱装
置。8. The heat dissipating member is made of aluminum, and the heat dissipating member is made of aluminum.
The heating device according to item 4, item 5, item 6, or item 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61015319A JPH07107869B2 (en) | 1986-01-27 | 1986-01-27 | Heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61015319A JPH07107869B2 (en) | 1986-01-27 | 1986-01-27 | Heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62176081A JPS62176081A (en) | 1987-08-01 |
| JPH07107869B2 true JPH07107869B2 (en) | 1995-11-15 |
Family
ID=11885447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61015319A Expired - Lifetime JPH07107869B2 (en) | 1986-01-27 | 1986-01-27 | Heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07107869B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6511691B2 (en) * | 2017-02-02 | 2019-05-15 | 株式会社デュプラス | Water tank heater |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5511102Y2 (en) * | 1973-08-10 | 1980-03-11 |
-
1986
- 1986-01-27 JP JP61015319A patent/JPH07107869B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62176081A (en) | 1987-08-01 |
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