JPS5670416A - Switching device for detecting level of liquid - Google Patents

Switching device for detecting level of liquid

Info

Publication number
JPS5670416A
JPS5670416A JP14799579A JP14799579A JPS5670416A JP S5670416 A JPS5670416 A JP S5670416A JP 14799579 A JP14799579 A JP 14799579A JP 14799579 A JP14799579 A JP 14799579A JP S5670416 A JPS5670416 A JP S5670416A
Authority
JP
Japan
Prior art keywords
liquid
electrode
level
turned
time constant
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.)
Granted
Application number
JP14799579A
Other languages
Japanese (ja)
Other versions
JPS5916205B2 (en
Inventor
Masanori Yoshida
Shinsuke Tamai
Kunio Yokoo
Koji Ueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Densan Ltd
Fuji Electric Co Ltd
Original Assignee
Ebara Densan Ltd
Fuji Electric Co Ltd
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 by Ebara Densan Ltd, Fuji Electric Co Ltd filed Critical Ebara Densan Ltd
Priority to JP14799579A priority Critical patent/JPS5916205B2/en
Publication of JPS5670416A publication Critical patent/JPS5670416A/en
Publication of JPS5916205B2 publication Critical patent/JPS5916205B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To increase usability and reliability of the device by giving a time constant to the action of a relay for monitoring and controlling the level of liquid in the liquid-level control and by performing the control with electrodes for detecting the level of liquid and a means of photocoupler.
CONSTITUTION: An electrode circuit is formed on the secondary side of an AC transformer Tr in such a manner that a closed loop is formed between electrode A and C and through electrode A and B out of the long electrode A, the medium electrode B and the short electrode C for detecting the level of liquid. And, when a power source is put on while the level of liquid rises and reaches the electrode B, a transistor T1 turns on and next T2 turns conductive after the time constant of a resistance R5 a capacitor C1. During this time constant, a base current flows to T3 through the intermediary of the relay RY for monitoring and controlling the level of liquid to turn T3 on, and the resistance of PC is turned small by the photocoupler of LED-PC, whereby the circuit between electrodes B and C is short- circuited, T1 is turned off, T2 and RY are turned off and T3 continues to be ON. As the result, the sounding of a hot-water alarm which is unnecessary at the time of water supply can be prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP14799579A 1979-11-15 1979-11-15 Liquid level detection switch device Expired JPS5916205B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14799579A JPS5916205B2 (en) 1979-11-15 1979-11-15 Liquid level detection switch device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14799579A JPS5916205B2 (en) 1979-11-15 1979-11-15 Liquid level detection switch device

Publications (2)

Publication Number Publication Date
JPS5670416A true JPS5670416A (en) 1981-06-12
JPS5916205B2 JPS5916205B2 (en) 1984-04-13

Family

ID=15442761

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14799579A Expired JPS5916205B2 (en) 1979-11-15 1979-11-15 Liquid level detection switch device

Country Status (1)

Country Link
JP (1) JPS5916205B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS584030U (en) * 1981-06-30 1983-01-11 松下電工株式会社 Liquid level display relay device
JPS62201323A (en) * 1986-02-28 1987-09-05 Kawamoto Seisakusho:Kk Liquid level detector
JPH01191018A (en) * 1988-01-26 1989-08-01 Matsushita Electric Works Ltd Liquid level detector
WO2008074247A1 (en) * 2006-12-20 2008-06-26 Print-Rite Technology Development Co., Ltd Of Zhuhai A detecting circuit and an ink cartridge
CN115224458A (en) * 2022-08-16 2022-10-21 江苏快乐电源(涟水)有限公司 Acid injection device for lead storage battery

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS584030U (en) * 1981-06-30 1983-01-11 松下電工株式会社 Liquid level display relay device
JPS62201323A (en) * 1986-02-28 1987-09-05 Kawamoto Seisakusho:Kk Liquid level detector
JPH01191018A (en) * 1988-01-26 1989-08-01 Matsushita Electric Works Ltd Liquid level detector
WO2008074247A1 (en) * 2006-12-20 2008-06-26 Print-Rite Technology Development Co., Ltd Of Zhuhai A detecting circuit and an ink cartridge
CN115224458A (en) * 2022-08-16 2022-10-21 江苏快乐电源(涟水)有限公司 Acid injection device for lead storage battery
CN115224458B (en) * 2022-08-16 2023-10-13 江苏快乐电源(涟水)有限公司 Acid injection device for lead storage battery

Also Published As

Publication number Publication date
JPS5916205B2 (en) 1984-04-13

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