JPH0433123U - - Google Patents
Info
- Publication number
- JPH0433123U JPH0433123U JP7514690U JP7514690U JPH0433123U JP H0433123 U JPH0433123 U JP H0433123U JP 7514690 U JP7514690 U JP 7514690U JP 7514690 U JP7514690 U JP 7514690U JP H0433123 U JPH0433123 U JP H0433123U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- fan
- heating element
- resistor
- series
- 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
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Control Of Temperature (AREA)
Description
第１図は本考案の一実施例の高温検出回路、第
２図は従来の温度検出回路の一例、第３図は従来
の回路の使用による不具合の説明図である。
１２……比較器、１３……発熱体、１４……フ
アン、１５……開閉手段（リレー接点）、Ｒ１〜
Ｒ３……抵抗、ＴＨ……温度感応抵抗素子（サー
ミスタ）、ＶＣＣ……第１系統の供給電源、ＶＤ
Ｄ……第２系統の供給電源。
FIG. 1 is a high temperature detection circuit according to an embodiment of the present invention, FIG. 2 is an example of a conventional temperature detection circuit, and FIG. 3 is an explanatory diagram of problems caused by use of the conventional circuit. 12...Comparator, 13...Heating element, 14...Fan, 15...Switching means (relay contact), R1 ~
R3 ...Resistance, TH...Temperature sensitive resistance element (thermistor), VCC...1st system power supply, VD
D...Second system power supply.
Claims (1)
排熱及び／又は空冷用フアンを有し、前記制御部
への給電用第１系統の電源と発熱体及びフアンへ
の給電用第２系統の電源を有し、待機状態では前
記発熱体及びフアンへの給電を停止する開閉手段
を有する装置に設けられ、装置内温度が設定温度
を超えた場合に高温検出信号を出力する高温検出
回路であつて、 第１の抵抗Ｒ１と温度感応抵抗素子ＴＨとを直
列接続するとともに、その接続点を電圧比較器１
２の比較電圧入力端子に接続して、さらに、前記
第１の抵抗Ｒ１と温度感応抵抗素子ＴＨとの直列
回路を装置の第１系統の電源ＶＣＣに接続し、 第２の抵抗Ｒ２と第３の抵抗Ｒ３とを直列接続
するとともに、その接続点を前記比較器１２の基
準電圧入力端子に接続して、さらに、前記抵抗Ｒ
２とＲ３の直列回路を装置の第２系統の電源ＶＤ
Ｄに接続し、 前記開閉手段は、その開放により、前記発熱体
、フアン及び抵抗Ｒ２とＲ３の直列回路への給電
が停止されるように前記第２系統の電源回路中に
設けてなることを特徴とする高温検出回路。[Claims for Utility Model Registration] A control unit including a CPU, a heating element such as a CRT, and a fan for exhaust heat and/or air cooling, and a first power supply system for supplying power to the control unit, the heating element, and the fan. The apparatus is provided with a second power supply system for supplying power to the heating element and the fan, and has an opening/closing means that stops power supply to the heating element and fan in a standby state, and generates a high temperature detection signal when the internal temperature of the apparatus exceeds the set temperature. A high temperature detection circuit that outputs
Further, a series circuit of the first resistor R1 and the temperature sensitive resistive element TH is connected to the power supply VCC of the first system of the device, and the second resistor R2 and A third resistor R3 is connected in series, and the connection point thereof is connected to the reference voltage input terminal of the comparator 12, and the resistor R3 is connected in series.
The series circuit of 2 and R3 is connected to the power supply VD of the second system of the device.
D, and the opening/closing means is provided in the power supply circuit of the second system so that when the opening/closing means is opened, power supply to the series circuit of the heating element, the fan, and the resistors R2 and R3 is stopped. A high temperature detection circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7514690U JPH0433123U (en) | 1990-07-13 | 1990-07-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7514690U JPH0433123U (en) | 1990-07-13 | 1990-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0433123U true JPH0433123U (en) | 1992-03-18 |
Family
ID=31615468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7514690U Pending JPH0433123U (en) | 1990-07-13 | 1990-07-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0433123U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0920136A (en) * | 1995-07-10 | 1997-01-21 | Tamura Plast Seihin Kk | Mounting structure of back visor |
| JP2017199099A (en) * | 2016-04-26 | 2017-11-02 | レノボ・シンガポール・プライベート・リミテッド | Electronic equipment and cooling device |
-
1990
- 1990-07-13 JP JP7514690U patent/JPH0433123U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0920136A (en) * | 1995-07-10 | 1997-01-21 | Tamura Plast Seihin Kk | Mounting structure of back visor |
| JP2017199099A (en) * | 2016-04-26 | 2017-11-02 | レノボ・シンガポール・プライベート・リミテッド | Electronic equipment and cooling device |
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