JPH07235247A - Temperature control device - Google Patents
Temperature control deviceInfo
- Publication number
- JPH07235247A JPH07235247A JP2251694A JP2251694A JPH07235247A JP H07235247 A JPH07235247 A JP H07235247A JP 2251694 A JP2251694 A JP 2251694A JP 2251694 A JP2251694 A JP 2251694A JP H07235247 A JPH07235247 A JP H07235247A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- thermal fuse
- fuse
- color
- control device
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、所定温度に上昇すると
回路を開放する温度ヒューズを備えた温度制御装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device having a temperature fuse that opens a circuit when a temperature rises to a predetermined temperature.
【０００２】[0002]
【従来の技術】従来、たとえば電気カーペットなどの電
熱器具には、温度が所定値以上に上昇すると回路を開放
する温度制御装置となる安全装置が設けられている。こ
の安全装置はたとえば電源回路に接続された抵抗などの
発熱体に接触して、所定の温度以上で溶断し、この溶断
により電源回路を開放する温度ヒューズが設けられてい
る。2. Description of the Related Art Conventionally, an electric heating device such as an electric carpet is provided with a safety device which serves as a temperature control device for opening a circuit when the temperature rises above a predetermined value. This safety device is provided with a temperature fuse that contacts a heating element such as a resistor connected to a power supply circuit to melt it at a predetermined temperature or higher and open the power supply circuit by this melting.
【０００３】そして、電熱器具が所定の温度以上に過熱
し、火災などの事故が発生することを防止している。Further, it is prevented that the electric heating device is overheated to a predetermined temperature or higher and an accident such as a fire occurs.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来の温度制御装置の場合、温度ヒューズ自体の不良や過
電流によりたとえ温度ヒューズの温度が所定値以上に上
昇しなくても、温度ヒューズが切断してしまうことがあ
る。However, in the case of the above-mentioned conventional temperature control device, even if the temperature of the temperature fuse does not rise above a predetermined value due to a defect of the temperature fuse itself or overcurrent, the temperature fuse is blown. It may happen.
【０００５】そして、このような場合にも温度が上昇し
て温度ヒューズが溶断したものと思われ、温度ヒューズ
が開放した原因を正確に把握できないおそれがある問題
を有している。Even in such a case, it is considered that the temperature fuse rises and the thermal fuse is blown, and there is a problem that it may not be possible to accurately grasp the cause of the thermal fuse opening.
【０００６】本発明は、上記問題点に鑑みなされたもの
で、温度ヒューズの温度が所定値以上に上昇して溶断し
たかあるいは温度上昇以外の理由で切断したのかを容易
に把握でき温度ヒューズの切断原因を容易に探求できる
温度制御装置を提供することを目的とする。The present invention has been made in view of the above problems, and it is possible to easily grasp whether the temperature of the thermal fuse has risen above a predetermined value and is blown, or is cut for a reason other than the temperature rise. An object of the present invention is to provide a temperature control device capable of easily searching the cause of disconnection.
【０００７】[0007]
【課題を解決するための手段】本発明は、回路に電気的
に接続された発熱体に接触して設けられ所定の温度以上
に上昇すると回路を開放する温度ヒューズを備えた温度
制御装置において、前記温度ヒューズは、温度が前記所
定の温度ないしこの温度より若干低い温度で変色する変
色手段を有するものである。SUMMARY OF THE INVENTION The present invention provides a temperature control device comprising a temperature fuse provided in contact with a heating element electrically connected to a circuit and opening the circuit when the temperature rises above a predetermined temperature. The thermal fuse has a color changing unit that changes color at the predetermined temperature or a temperature slightly lower than this predetermined temperature.
【０００８】[0008]
【作用】本発明は、温度ヒューズに、温度ヒューズの溶
断温度ないし温度ヒューズが溶断する温度より若干低い
温度で変色する変色手段を有しているため、温度ヒュー
ズが温度上昇により溶断すれば変色手段が変色するの
で、温度上昇による溶断であるか否かを確実に把握でき
る。According to the present invention, since the thermal fuse has the color changing means for changing the color at a temperature at which the temperature fuse is blown or a temperature slightly lower than the temperature at which the temperature fuse is blown, if the temperature fuse is blown by the temperature rise, the color changing means is changed. As the color changes, it can be surely grasped whether or not the melting is due to the temperature rise.
【０００９】[0009]
【実施例】以下、本発明の温度制御装置を有する一実施
例の電熱器具について図面を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric heating device of an embodiment having a temperature control device of the present invention will be described below with reference to the drawings.
【００１０】図２において、Ｅは商用交流電源で、この
商用交流電源Ｅにはたとえば９６℃で溶断する温度ヒュ
ーズ１およびリレー２のリレー接点３を介してヒータ４
が接続されている。In FIG. 2, E is a commercial AC power source, and the commercial AC power source E has a heater 4 through a temperature fuse 1 that melts at 96 ° C. and a relay contact 3 of a relay 2.
Are connected.
【００１１】また、温度ヒューズ１を介した商用交流電
源Ｅには温度制御用の安全回路となる制御回路５が接続
され、この制御回路５には発熱体となる抵抗６が接続さ
れ、この抵抗６は温度ヒューズ１に接触されている。さ
らに、制御回路５には温度センサ７が接続され、この温
度センサ７はヒータ４の近傍に位置して配設されてい
る。また、制御回路５にはリレー２のリレーコイル８が
接続され、このリレーコイル８によりリレー接点３が制
御される。A commercial AC power source E via the temperature fuse 1 is connected to a control circuit 5 which is a safety circuit for temperature control, and a resistor 6 which is a heating element is connected to the control circuit 5 6 is in contact with the thermal fuse 1. Further, a temperature sensor 7 is connected to the control circuit 5, and the temperature sensor 7 is arranged near the heater 4. Further, the relay coil 8 of the relay 2 is connected to the control circuit 5, and the relay contact 3 is controlled by the relay coil 8.
【００１２】一方、抵抗６は図３および図４に示すよう
にアルミニウムテープ９にて温度ヒューズ１と一体に巻
回されて、温度ヒューズ１に接触して設けられている。On the other hand, the resistor 6 is provided in contact with the thermal fuse 1 by being wound integrally with the thermal fuse 1 with an aluminum tape 9 as shown in FIGS. 3 and 4.
【００１３】さらに、温度ヒューズ１には、図１に示す
ように、温度ヒューズ１が溶断する温度である９６℃で
変色する変色手段としての変色マーク10が印刷されてい
る。Further, as shown in FIG. 1, the thermal fuse 1 is printed with a color change mark 10 as a color changing means for changing the color at 96 ° C., which is the temperature at which the thermal fuse 1 melts.
【００１４】次に、上記実施例の動作について説明す
る。Next, the operation of the above embodiment will be described.
【００１５】まず、商用交流電源Ｅの電力によりヒータ
４を加熱する。制御回路５では、温度センサ７によりヒ
ータ４の温度を検出し、リレー２を制御してリレー接点
３を開閉し、商用交流電源Ｅの電力をヒータ４に通電す
る時間を制御して、ヒータ４への電力を変化させてヒー
タ４の温度を制御する。そして、ヒータ４の温度が所定
値以上上昇した場合にも、リレー接点３を開放する。First, the heater 4 is heated by the electric power of the commercial AC power source E. In the control circuit 5, the temperature of the heater 4 is detected by the temperature sensor 7, the relay 2 is controlled to open / close the relay contact 3, and the time for energizing the heater 4 with the electric power of the commercial AC power source E is controlled to control the heater 4 To control the temperature of the heater 4. Then, even when the temperature of the heater 4 rises above a predetermined value, the relay contact 3 is opened.
【００１６】また、ヒータ４が過熱した場合には、抵抗
６を発熱させ温度ヒューズ１の温度がたとえば９６℃に
なると溶断して回路を開放する。さらに、温度ヒューズ
１の温度が９６℃になると変色マーク10が変色するの
で、熱により溶断したことを容易に判断できる。Further, when the heater 4 is overheated, the resistor 6 is caused to generate heat and the temperature fuse 1 is blown to open the circuit when the temperature reaches, for example, 96 ° C. Further, when the temperature of the thermal fuse 1 reaches 96 ° C., the discoloration mark 10 discolors, so that it can be easily determined that the fuse has melted due to heat.
【００１７】一方、温度ヒューズ１自体の不良や過電流
によりたとえ温度ヒューズ１の温度が所定値以上に上昇
しなくても、温度ヒューズ１が切断した場合には変色マ
ーク10が変色しないので、温度上昇による溶断でないこ
とを容易に判断できる。On the other hand, even if the temperature of the thermal fuse 1 does not rise above a predetermined value due to a defect of the thermal fuse 1 itself or overcurrent, the discoloration mark 10 does not discolor when the thermal fuse 1 is cut. It can be easily determined that the melting is not caused by rising.
【００１８】このように、変色マーク10が変化するか否
かにより、温度上昇による溶断か否かを容易に判断でき
る。As described above, it is possible to easily determine whether or not the fusing is caused by the temperature rise, depending on whether or not the color change mark 10 changes.
【００１９】また、変色手段としては印刷による変色マ
ーク10に代えて、温度上昇により色が変化する変色テー
プ11を図５に示すように温度ヒューズ１の周囲に巻回す
るようにしてもよい。このように、単に変色テープ11を
巻き付けるものであれば、従来のものにも簡単に装着で
きる。Further, as the color changing means, instead of the color changing mark 10 formed by printing, a color changing tape 11 whose color changes with temperature rise may be wound around the thermal fuse 1 as shown in FIG. As described above, if the color-changing tape 11 is simply wound, it can be easily attached to the conventional one.
【００２０】なお、いずれの場合にも変色する温度は、
温度ヒューズ１の溶断温度に限らず、温度ヒューズ１の
溶断温度より１０℃程度低い範囲の温度で変色するよう
にしても同様の効果を得られ、温度ヒューズ１の許容範
囲の誤差は指定の温度より低く設定されているので、温
度ヒューズ１の器差にも対応できる。In any case, the temperature at which the color changes is
The same effect can be obtained by changing the color not only at the fusing temperature of the thermal fuse 1 but also at a temperature lower than the fusing temperature of the thermal fuse 1 by about 10 ° C. The error in the allowable range of the thermal fuse 1 is the specified temperature. Since it is set lower, it is possible to cope with the instrumental difference of the thermal fuse 1.
【００２１】[0021]
【発明の効果】本発明の温度制御装置によれば、温度ヒ
ューズに、温度ヒューズの溶断温度ないし温度ヒューズ
が溶断する温度より若干低い温度で変色する変色手段を
有しているため、温度ヒューズが温度上昇により溶断す
れば変色手段が変色するので、変色手段の変色の有無に
より温度上昇による溶断であるか否かを確実に把握でき
る。According to the temperature control device of the present invention, since the thermal fuse has the color changing means for changing the color at a temperature at which the thermal fuse is blown or a temperature slightly lower than the temperature at which the thermal fuse is blown, the thermal fuse is Since the color changing means changes color when it is melted due to a temperature rise, it can be surely determined whether or not the melting is due to a temperature rise depending on whether or not the color changing means changes color.
【図１】本発明の温度制御装置の一実施例の温度ヒュー
ズを示す斜視図である。FIG. 1 is a perspective view showing a temperature fuse of an embodiment of a temperature control device of the present invention.
【図２】同上電熱器具の回路構成を示す回路図である。FIG. 2 is a circuit diagram showing a circuit configuration of the same electric heating appliance.
【図３】同上温度ヒューズと発熱体との装着状況を示す
斜視図である。FIG. 3 is a perspective view showing a mounting state of the thermal fuse and the heating element of the above.
【図４】同上側面図である。FIG. 4 is a side view of the same.
【図５】同上他の実施例の温度ヒューズを示す斜視図で
ある。FIG. 5 is a perspective view showing a thermal fuse of another embodiment of the same.
１ 温度ヒューズ ６ 発熱体としての抵抗 10 変色手段としての変色マーク 11 変色手段としての変色テープ 1 Thermal fuse 6 Resistance as heating element 10 Color change mark as color change means 11 Color change tape as color change means
Claims (1)
して設けられ所定の温度以上に上昇すると回路を開放す
る温度ヒューズを備えた温度制御装置において、 前記温度ヒューズは、温度が前記所定の温度ないしこの
温度より若干低い温度で変色する変色手段を有すること
を特徴とした温度制御装置。1. A temperature control device comprising a temperature fuse provided in contact with a heating element electrically connected to a circuit and opening the circuit when the temperature rises above a predetermined temperature. A temperature control device having a color changing means for changing color at a predetermined temperature or a temperature slightly lower than this temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2251694A JPH07235247A (en) | 1994-02-21 | 1994-02-21 | Temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2251694A JPH07235247A (en) | 1994-02-21 | 1994-02-21 | Temperature control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07235247A true JPH07235247A (en) | 1995-09-05 |
Family
ID=12084940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2251694A Pending JPH07235247A (en) | 1994-02-21 | 1994-02-21 | Temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07235247A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009283324A (en) * | 2008-05-23 | 2009-12-03 | Uchihashi Estec Co Ltd | Protection element |
-
1994
- 1994-02-21 JP JP2251694A patent/JPH07235247A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009283324A (en) * | 2008-05-23 | 2009-12-03 | Uchihashi Estec Co Ltd | Protection element |
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