JPS6225824U - - Google Patents

Info

Publication number
JPS6225824U
JPS6225824U JP11709985U JP11709985U JPS6225824U JP S6225824 U JPS6225824 U JP S6225824U JP 11709985 U JP11709985 U JP 11709985U JP 11709985 U JP11709985 U JP 11709985U JP S6225824 U JPS6225824 U JP S6225824U
Authority
JP
Japan
Prior art keywords
detection
thermistor
power supply
liquid level
circuit
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
Application number
JP11709985U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP11709985U priority Critical patent/JPS6225824U/ja
Publication of JPS6225824U publication Critical patent/JPS6225824U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の第１実施例のサーミスタ式液
位検出装置の回路図、第２図は本考案の第２実施
例のサーミスタ式液位検出装置の回路図、第３図
は本考案の第３実施例のサーミスタ式液位検出装
置の回路図、第４図は従来のサーミスタ式液位検
出装置の回路図である。 １３…キースイツチ、１４…サーミスタ、１５
，１９，２０，２１，２４，２６，２９，３０，
３３…抵抗、１６，２５，２７，２８，３７…ト
ランジスタ、２２…コンパレータ、１７，２３，
３２…ダイオード２３、１８…コンデンサ、３４
…出力端子、３５…ランプ、３６ａ…接点、３６
ｂ…コイル３６、３８…タイマー、３９…フリツ
プフロツプ。 Fig. 1 is a circuit diagram of a thermistor type liquid level detection device according to the first embodiment of the present invention, Fig. 2 is a circuit diagram of a thermistor type liquid level detection device according to the second embodiment of the present invention, and Fig. 3 is a circuit diagram of the thermistor type liquid level detection device according to the second embodiment of the present invention. FIG. 4 is a circuit diagram of a thermistor type liquid level detection device according to the third embodiment, and FIG. 4 is a circuit diagram of a conventional thermistor type liquid level detection device. 13...Key switch, 14...Thermistor, 15
,19,20,21,24,26,29,30,
33...Resistor, 16,25,27,28,37...Transistor, 22...Comparator, 17,23,
32...Diode 23, 18...Capacitor, 34
...Output terminal, 35...Lamp, 36a...Contact, 36
b...Coil 36, 38...Timer, 39...Flip-flop.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 液体容器内の検出すべき所定位置に検出用サー
ミスタを配設し、液中と空気中における放熱係数
の相違による抵抗値変化を検知して液位の低下を
検出するようにしたサーミスタ式液位検出装置に
おいて、上記検出用サーミスタに給電するための
給電回路と、上記検出用サーミスタの抵抗値変化
を電圧変化として取り出し、この検出電圧が所定
レベルに達したか否かを判定して判定信号を出力
する検出回路と、該検出回路の判定信号により上
記給電回路を制御し、上記検出用サーミスタへの
給電路を開閉制御する制御回路とからなるサーミ
スタ式液位検出装置。 Thermistor type liquid level detects a drop in liquid level by placing a detection thermistor at a predetermined position within the liquid container to detect changes in resistance due to differences in heat radiation coefficients between the liquid and air. In the detection device, a power supply circuit for feeding power to the detection thermistor and a change in the resistance value of the detection thermistor are extracted as a voltage change, and a judgment signal is generated by determining whether or not this detection voltage has reached a predetermined level. A thermistor type liquid level detection device comprising a detection circuit that outputs an output, and a control circuit that controls the power supply circuit based on a determination signal from the detection circuit and controls opening/closing of a power supply path to the detection thermistor.
JP11709985U 1985-07-30 1985-07-30 Pending JPS6225824U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11709985U JPS6225824U (en) 1985-07-30 1985-07-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11709985U JPS6225824U (en) 1985-07-30 1985-07-30

Publications (1)

Publication Number Publication Date
JPS6225824U true JPS6225824U (en) 1987-02-17

Family

ID=31002301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11709985U Pending JPS6225824U (en) 1985-07-30 1985-07-30

Country Status (1)

Country Link
JP (1) JPS6225824U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01211195A (en) * 1988-02-19 1989-08-24 Sanden Corp Push button switch for automatic vending machine and automatic vending machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5277758A (en) * 1975-12-24 1977-06-30 Automobile Antipollution Liquid level detector
JPS59107213A (en) * 1982-12-10 1984-06-21 Mitsubishi Electric Corp Detector for liquid level
JPS59108921A (en) * 1982-12-14 1984-06-23 Mitsubishi Electric Corp Liquid level detecting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5277758A (en) * 1975-12-24 1977-06-30 Automobile Antipollution Liquid level detector
JPS59107213A (en) * 1982-12-10 1984-06-21 Mitsubishi Electric Corp Detector for liquid level
JPS59108921A (en) * 1982-12-14 1984-06-23 Mitsubishi Electric Corp Liquid level detecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01211195A (en) * 1988-02-19 1989-08-24 Sanden Corp Push button switch for automatic vending machine and automatic vending machine
JPH042991B2 (en) * 1988-02-19 1992-01-21

Similar Documents

Publication Publication Date Title
JPS6225824U (en)
JPS5824688U (en) Refrigerator dew prevention device
JPS63135352U (en)
JPS6434556U (en)
JPS61190830U (en)
JPS6272463U (en)
JPS61137231U (en)
JPS61132993U (en)
JPS6219088U (en)
JPS58194301U (en) Steam generator dry cooking protection device
JPH0252131U (en)
JPS6434557U (en)
JPS6365988U (en)
JPS63118891U (en)
JPH0176614U (en)
JPS6188447U (en)
JPS63157755U (en)
JPS6374949U (en)
JPH0164730U (en)
JPS63183353U (en)
JPH01105792U (en)
JPS5863532U (en) Liquid level detection device
JPS61126997U (en)
JPS6189912U (en)
JPS6363683U (en)