JPH085304B2 - Automotive blower speed control resistor - Google Patents
Automotive blower speed control resistorInfo
- Publication number
- JPH085304B2 JPH085304B2 JP61157720A JP15772086A JPH085304B2 JP H085304 B2 JPH085304 B2 JP H085304B2 JP 61157720 A JP61157720 A JP 61157720A JP 15772086 A JP15772086 A JP 15772086A JP H085304 B2 JPH085304 B2 JP H085304B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- terminal
- circuit
- speed control
- blower
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00828—Ventilators, e.g. speed control
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Resistors (AREA)
Description
【発明の詳細な説明】 ［発明の技術分野］ 本発明は自動車用送風機の速度制御用抵抗器に係り、
特に安定性及び信頼性を向上させたこの種の抵抗器に関
するものである。Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a speed control resistor for an automobile blower,
In particular, it relates to a resistor of this type having improved stability and reliability.
［発明の技術的背景］ 従来から、自動車用送風機の速度制御用抵抗器は、電
熱線（例えばNCHW又はFCHW等）をコイル上に巻回したも
のを、絶縁ベースに圧入された端子に一又は複数個設け
られ、その端子を選択することによって抵抗値を決定し
ている。そして、抵抗器に異常電流が流れたときの、発
生するジュール熱に対する保護手段としては、抵抗体自
体を低融点の合金で形成して電熱線とヒューズを兼ね備
えたものや（実公昭57−4048号）、抵抗体とは別に抵抗
体と接続端子との間に導電性の板バネを低融点合金で取
着したもの（実開昭57−163706号）が知られている。[Technical background of the invention] Conventionally, a resistor for speed control of a blower for an automobile has a heating wire (for example, NCHW or FCHW) wound around a coil, which is attached to a terminal press-fitted into an insulating base. A plurality of resistors are provided, and the resistance value is determined by selecting the terminal. As a means for protecting against Joule heat generated when an abnormal current flows through a resistor, a resistor itself is made of a low melting point alloy and has both a heating wire and a fuse (Actual Publication No. 57-4048). In addition to the resistor, a conductive leaf spring is attached between the resistor and the connection terminal with a low melting point alloy (Actual No. 57-163706).
このような抵抗器は、自動車内部における樹脂製通風
ダクト内に設置されるものである。即ち、送風機用モー
タにより駆動される送風機によって、樹脂製の通風ダク
トから送風するための送風機の速度制御用抵抗器として
使用され、この送風機の送風空気によって強制空冷され
るものである。保護手段が動作する場合としては、先
ず、送風機用モータにおけるモータロック或いはモータ
ショート等で送風が停止し、かつ異常電流が流れると抵
抗体が発熱する。この場合、異常電流により抵抗体が焼
き切れて抵抗回路を遮断し、又は抵抗体のジュール熱に
よって低融点合金が溶解されて板バネを作動させ、その
回路を遮断するようになっている。しかしながら、この
ような従来の抵抗器はユーザーの勝手な改造、例えばPb
−Sn系のハンダを用いてハンダ付けを施したり、針金等
で接続したりして再使用される可能性を有しており、こ
の様な改造はハーネス、通風ダクト、相手方部品などの
損傷をまねくばかりでなく自動車火災等の原因になる危
険性があった。Such a resistor is installed in a resin ventilation duct inside an automobile. That is, it is used as a speed control resistor of a blower for blowing air from a ventilation duct made of resin by a blower driven by a blower motor, and is forcedly cooled by the blown air of this blower. When the protection means operates, first, when the blower is stopped due to a motor lock or a motor short-circuit in the blower motor, and an abnormal current flows, the resistor heats up. In this case, the resistor burns out due to an abnormal current to shut off the resistance circuit, or the Joule heat of the resistor melts the low melting point alloy to operate the leaf spring to shut off the circuit. However, such conventional resistors can be modified by the user, for example Pb.
There is a possibility that it will be reused after being soldered with Sn-based solder or connected with wire etc.This kind of modification will not damage the harness, ventilation duct, counterpart parts, etc. There was a risk of not only causing but also causing a car fire.
これらの問題を解決するものとして、我々は既にいく
つかのこの種の抵抗器（特願昭61−55530号＝特開昭62
−211901号公報、特願昭61−71886号公報＝特開昭62−2
29801号公報）を提案した。その一例を第７図に示す。
第７図において、抵抗体１は薄い金属板又は金属箔から
成り、絶縁板２を介して押え板４により放熱板３に固定
されており、この抵抗体１を取り付けた放熱板３をポス
ト８を介して取付ベース５に固定し、取付ベース５上に
設けられた端子６と抵抗体１の端子部1a〜1dを接続する
ように構成されている。このような抵抗器においては抵
抗体１が外部に露出していないので、抵抗器に対するユ
ーザーの改造やその他の事故の可能性を排除したが、抵
抗器以外で起こりうる異常については対策がなされてい
なかった。例えば、第８図は自動車用送風機の回路の一
例であるが、この回路においてブロアモータＭの異常等
で抵抗器10のメインヒューズ11が溶断した場合、ブロア
モーターＭ側の端子COMと切替スイッチ12側の端子H1、M
H、ML及びLOWのいずれかとの間のワイヤハーネス13をユ
ーザーが直結すると、メインヒューズ11を通らない回路
が形成されてしまい、抵抗体の発するジュール熱が持続
され火災の原因となる。このような抵抗器以外での短絡
は、ユーザーの改造以外にハーネス自体の焼損等によっ
ても起こりうる。In order to solve these problems, we have already proposed some resistors of this type (Japanese Patent Application No. 61-55530).
-211901 and Japanese Patent Application No. 61-71886 = JP 62-2
29801). One example is shown in FIG.
In FIG. 7, the resistor 1 is made of a thin metal plate or metal foil, and is fixed to the heat radiating plate 3 by the pressing plate 4 via the insulating plate 2. The heat radiating plate 3 to which the resistor 1 is attached is attached to the post 8 It is configured to be fixed to the mounting base 5 via, and to connect the terminal 6 provided on the mounting base 5 and the terminal portions 1a to 1d of the resistor 1. In such a resistor, the resistor 1 is not exposed to the outside, so the possibility of user modification or other accidents to the resistor was excluded, but measures were taken for abnormalities that could occur outside the resistor. There wasn't. For example, FIG. 8 shows an example of a circuit for a blower for an automobile. In this circuit, when the main fuse 11 of the resistor 10 is blown due to an abnormality of the blower motor M, the terminal COM and the changeover switch 12 side of the blower motor M side. Terminals H1, M
When the user directly connects the wire harness 13 to any one of H, ML and LOW, a circuit that does not pass through the main fuse 11 is formed, and the Joule heat generated by the resistor is sustained, which causes a fire. Such a short circuit other than the resistor may occur due to burning of the harness itself or the like in addition to the modification by the user.
［発明の目的］ 本発明は、上記従来の問題点を解決するためになされ
たもので、抵抗器以外の場所で発生しうる事故に対して
も保護種が働く、極めて安全性の高い自動車用送風機の
速度制御用抵抗機を提供せんとするものである。[Object of the Invention] The present invention has been made in order to solve the above-mentioned conventional problems, and has an extremely high safety for automobiles, in which a protective species works against accidents that may occur in places other than resistors. It is intended to provide a resistance machine for controlling the speed of the blower.
［発明の概要］ このような目的を達成するために、本発明の速度制御
用抵抗器は、複数の端子部を有する抵抗体と、該抵抗体
を支持し且つ該抵抗体の複数の端子部とそれぞれ接続さ
れる端子を有する取付ベースとから成る自動車用送風機
の速度制御用抵抗器において、前記複数の端子部と前記
端子がそれぞれ温度ヒューズを介して接続されているこ
とを特徴とし、望ましくは前記抵抗体が、金属板又は金
属箔より成り且つ前記複数の端子部がバネ性を有するも
のとする。[Summary of the Invention] In order to achieve such an object, a speed control resistor according to the present invention includes a resistor having a plurality of terminals, and a plurality of terminals for supporting the resistor and a plurality of terminals of the resistor. In a speed control resistor for an automobile blower, which comprises a mounting base having terminals respectively connected to the terminals, the plurality of terminal portions and the terminals are respectively connected via temperature fuses, and preferably The resistor is made of a metal plate or a metal foil, and the plurality of terminal portions have a spring property.
［発明の実施例］ 以下、本発明の実施例を図面に基き説明する。Embodiments of the Invention Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明に係る速度制御用抵抗器を用いた自動
車用送風機の回路図で、抵抗器10の共通端子10aはブロ
ワモータＭ側の端子COMと接続され、その他の端子10
a′、10b、10c及び10dはそれぞれ切替スイッチ12の各端
子H1、MH、ML及びLOWにワイヤーハーネス13（第８図）
を介して接続されている。FIG. 1 is a circuit diagram of an automobile blower using a speed control resistor according to the present invention. A common terminal 10a of the resistor 10 is connected to a terminal COM on the blower motor M side, and the other terminals 10 are connected.
a ', 10b, 10c and 10d are wire harnesses 13 (Fig. 8) at the terminals H1, MH, ML and LOW of the changeover switch 12, respectively.
Connected through.
抵抗器10において抵抗体１の共通端子部1aと端子10a
との間にはメインの温度ヒューズ11が接続される。又、
抵抗体１の端子部1bと端子10bとの間、端子部1cと端子1
0cとの間及び端子部1dと端子10dとの間には、それぞれ
温度ヒューズ14、15、16が設けられる。Common terminal 1a and terminal 10a of resistor 1 in resistor 10
A main thermal fuse 11 is connected between the and. or,
Between the terminal portion 1b and the terminal 10b of the resistor 1, between the terminal portion 1c and the terminal 1
Thermal fuses 14, 15 and 16 are provided between the terminal 0d and 0c and between the terminal portion 1d and the terminal 10d, respectively.
このような回路構成において、通常は抵抗器に異常電
流が流れた場合保護手段として切替スイッチがどのよう
に選択されていても少なくともメインの温度ヒューズ11
が溶断し、抵抗体１の異常過熱を防止する。そして仮に
第２図に示すようにユーザーによってブロワモータＭ側
の端子COMと切替スイッチ12の端子HI間を直結された場
合、メインの温度ヒューズ11を通らない回路が形成され
てしまうが、切替スイッチがMH、ML、LOWのいずれに設
定されていても温度ヒューズ14、15、16が働き、異常電
流による抵抗体の過熱を防止する。尚、切替スイッチ12
のOFFとH1では抵抗体１の過熱は生じない。In such a circuit configuration, normally, when an abnormal current flows through the resistor, at least the main thermal fuse 11 is selected regardless of how the changeover switch is selected as a protection means.
Fusing to prevent abnormal overheating of the resistor 1. If the user directly connects the terminal COM on the blower motor M side to the terminal HI of the changeover switch 12 as shown in FIG. 2, a circuit that does not pass the main thermal fuse 11 is formed, but the changeover switch is The thermal fuses 14, 15 and 16 work regardless of whether it is set to MH, ML or LOW to prevent the resistor from overheating due to an abnormal current. The changeover switch 12
When is OFF and H1, resistor 1 does not overheat.
端子COMと端子MH、端子COMと端子ML及び端子COMと端
子LOWの短絡の場合も同様にすべて、温度ヒューズ14、1
5、16のいずれかを通る回路が形成されるので異常時に
はこれら温度ヒューズ14、15、16が溶断し回路を遮断す
る。Similarly, in the case of short circuit between terminal COM and terminal MH, terminal COM and terminal ML, and terminal COM and terminal LOW, thermal fuse 14, 1
Since a circuit passing through either 5 or 16 is formed, these temperature fuses 14, 15 and 16 are blown to cut off the circuit in the event of an abnormality.
次に、このような回路構成を実現するための抵抗器の
構成を実施例により説明する。Next, the structure of a resistor for realizing such a circuit structure will be described by way of examples.
［実施例１］ 第３図は第７図に示した特願昭61−55530号（＝特開
昭62−211901号公報）の抵抗器に本発明を適用したもの
で、抵抗体１は押え板４によりヒートシンクである放熱
板３に固定され、その端子部1a、1b（図では２個である
が、実際は４〜５個ある。）が取付ベース５の端子6a、
6bにそれぞれ接続される。ここで抵抗体１はバネ性の高
い金属板から成り、端子部1a、1bはバネ性を高めた形状
に形成される。そして端子部1a、1bと端子6a、6bとは、
それぞれ温度ヒューズ17としてPb−Sn共晶ハンダ、望ま
しくは低融点合金のハンダ付けによって接続される。そ
して前述のような何らかの異常により、抵抗体１が過熱
した場合は、抵抗体１の発するジュール熱が端子部1a、
1bに伝導され、これによって温度ヒューズ（低融点合
金）17を溶かす。すると端子部1a、1bのバネの復元性で
はね上がり回路を遮断することになる。[Embodiment 1] FIG. 3 is a diagram in which the present invention is applied to the resistor of Japanese Patent Application No. 61-55530 (= Japanese Patent Laid-Open No. 62-211901) shown in FIG. It is fixed to the heat sink 3 which is a heat sink by the plate 4, and its terminal portions 1a and 1b (there are two in the figure, but actually four to five) are the terminals 6a of the mounting base 5.
Connected to 6b respectively. Here, the resistor 1 is made of a metal plate having a high spring property, and the terminal portions 1a and 1b are formed in a shape having a high spring property. And the terminal portions 1a, 1b and the terminals 6a, 6b are
Each of them is connected as a thermal fuse 17 by soldering a Pb-Sn eutectic solder, preferably a low melting point alloy. When the resistor 1 overheats due to some abnormality as described above, the Joule heat generated by the resistor 1 is generated by the terminal portion 1a,
Conducted by 1b, which melts the thermal fuse (low melting point alloy) 17. Then, the spring of the terminal portions 1a and 1b restores the spring circuit by the resilience.
［実施例２］ 実施例１と回路及び作動原理は同様であるが、抵抗体
１の端子部1a、1bに曲げ加工を施すのではなく、第４図
に示すように端子部1a、1bを短かめに設け、それぞれ端
子6a、6bの先端と低融点合金17でハンダ付けしたもので
ある。Example 2 The circuit and operating principle are the same as those of Example 1, but the terminals 1a and 1b of the resistor 1 are not bent, but the terminals 1a and 1b are replaced as shown in FIG. It is provided in a short length and soldered to the tips of the terminals 6a and 6b and the low melting point alloy 17, respectively.
［実施例３］ 第５図、第６図に示すように、端子部1a及び端子6aに
それぞれφ2mmの穴18、19をあけておき、これらの穴1
8、19を低融点合金から成るリベット20でカシメ止めし
たものである。[Embodiment 3] As shown in FIGS. 5 and 6, holes 18 and 19 having a diameter of 2 mm are formed in the terminal portion 1a and the terminal 6a, respectively.
8 and 19 are caulked with rivets 20 made of a low melting point alloy.
尚、これらの実施例における回路図（第１図）は１例
であり、これに限定するものではない。例えば、メイン
の温度ヒューズ11はなくてもよい。The circuit diagrams (FIG. 1) in these embodiments are examples, and the present invention is not limited to these. For example, the main thermal fuse 11 may be omitted.
［発明の効果］ 以上の説明からも明らかなように本発明の抵抗器にお
いてはメインの温度ヒューズとは別に異常過熱時に回路
を遮断する保護手段を設けたので、ユーザーによる勝手
な改造やワイヤーハーネスの焼損等があって短絡した場
合でも、異常時にはそれら保護手段が働き、二重に安全
な機構を提供できる。しかも、これらの機構のための新
たな部品を必要としないのでコスト的にも有利である。[Effects of the Invention] As is clear from the above description, in the resistor of the present invention, the protection means for interrupting the circuit at the time of abnormal overheating is provided in addition to the main temperature fuse, so that the user can freely modify the wiring harness. Even if a short circuit occurs due to burnout or the like, those protective means are activated in the event of an abnormality and a doubly safe mechanism can be provided. Moreover, there is no need for new parts for these mechanisms, which is advantageous in terms of cost.
第１図は本発明の抵抗器を適用した回路の一例を示す
図、第２図は同回路における異常時の一例を示す図、第
３図及び第４図はそれぞれ本発明の抵抗器の第１の実施
例及び第２の実施例を示す図、第５図及び第６図はそれ
ぞれ第３の実施例を示す図、第７図は従来例の分解斜視
図、第８図は同回路図である。 １……抵抗体 1a、1b、1c、1d……端子部 ５……取付ベース 6a、6b、10a′、10b、10c、10d……端子 10……抵抗器 14、15、16、17……温度ヒューズFIG. 1 is a diagram showing an example of a circuit to which the resistor of the present invention is applied, FIG. 2 is a diagram showing an example of an abnormal state in the circuit, and FIGS. 3 and 4 are respectively diagrams of the resistor of the present invention. 1 is a diagram showing the first and second embodiments, FIGS. 5 and 6 are diagrams showing a third embodiment, FIG. 7 is an exploded perspective view of a conventional example, and FIG. 8 is a circuit diagram of the same. Is. 1 ... Resistors 1a, 1b, 1c, 1d ...... Terminal 5 ... Mounting base 6a, 6b, 10a ', 10b, 10c, 10d ...... Terminal 10 ... Resistors 14, 15, 16, 17 ...... Thermal fuse
Claims (1)
抵抗体（１）と、前記抵抗体を支持し且つ前記抵抗体の
複数の端子部にそれぞれ接続される端子（6a、6b、10′
ａ、10b、10c、10d）を有する取付ベース（５）とから
成る自動車用送風機の速度制御用抵抗器（10）であっ
て、前記複数の端子部と前記端子との間をそれぞれ温度
ヒューズ（14、15、16、17）を介して接続したことを特
徴とする自動車用送風機の速度制御用抵抗器。1. A resistor (1) having a plurality of terminal portions (1a, 1b, 1c, 1d), and a terminal (6a) that supports the resistor and is connected to each of the plurality of terminal portions of the resistor. , 6b, 10 '
a, 10b, 10c, 10d) and a mounting base (5) having a speed control resistor (10) for an automobile blower, wherein a thermal fuse (10) is provided between the plurality of terminal portions and the terminals. A resistor for speed control of a blower for an automobile, characterized in that it is connected via a (14, 15, 16, 17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61157720A JPH085304B2 (en) | 1986-07-04 | 1986-07-04 | Automotive blower speed control resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61157720A JPH085304B2 (en) | 1986-07-04 | 1986-07-04 | Automotive blower speed control resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6313808A JPS6313808A (en) | 1988-01-21 |
| JPH085304B2 true JPH085304B2 (en) | 1996-01-24 |
Family
ID=15655897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61157720A Expired - Lifetime JPH085304B2 (en) | 1986-07-04 | 1986-07-04 | Automotive blower speed control resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH085304B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5460763A (en) * | 1993-12-24 | 1995-10-24 | Kabushiki Kaisha Meiki Seisakusho | Sprueless disc mold and disc molding method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6013279Y2 (en) * | 1973-06-29 | 1985-04-26 | 日本ラヂエ−タ−株式会社 | Overheat prevention device for motor resistance for automobile air conditioners |
-
1986
- 1986-07-04 JP JP61157720A patent/JPH085304B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6313808A (en) | 1988-01-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |