GB1381113A - Automatic control for electrode boilers - Google Patents
Automatic control for electrode boilersInfo
- Publication number
- GB1381113A GB1381113A GB1128772A GB1128772A GB1381113A GB 1381113 A GB1381113 A GB 1381113A GB 1128772 A GB1128772 A GB 1128772A GB 1128772 A GB1128772 A GB 1128772A GB 1381113 A GB1381113 A GB 1381113A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- triac
- current
- boiler
- water
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
- F22B1/30—Electrode boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/24—Controlling water feed or water level; Automatic water feeding or water-level regulators with electric switches
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7306—Electrical characteristic sensing
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Cookers (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
1381113 Automatic control of electrode boilers R H EATON-WILLIAMS 10 May 1972 [19 May f971 10 March 1972] 15886/71 and 11287/72 Heading G3R An electronic controller detects the current flowing in an electrode boiler, which depends on the water level, and operates feed and drain valves in a predetermined sequence at set current values. In the controller shown in Fig. 1, the electrode current is applied through a transformer to terminals 7, 8 connected by a variable resistor for setting the required levels. A control voltage is thus produced across resistor R3 and applied to inverting inputs of differential amplifiers in the form of integrated circuits IC1, IC2, IC3. Initially, with no electrode current flowing, all the amplifiers will produce negative outputs, so that a transistor Q1 is off, transistor Q2 is on, and triac GR1 is triggered to open a feed valve so that water flows into the boiler. At the same time, transistor Q3 is off, transistor Q4 is on, and a triac GR2 would be fired to open a drain valve, except that its gating circuit is shorted by a transistor Q7 turned on by transistor Q2, so that the drain valve is held closed. As the boiler fills, the electrode current increases to a point where the voltage across resistor R3 switches amplifier IC2 to turn off transistor Q4 and remove the firing signal for the triac GR2. Further current rise switches amplifier IC1, turning off transistor Q2 and triac GR1 and thus closing the feed valve. The water now boils, but the current may rise further due to increasing conductivity and expansion of the water. A rise of, say, 10% causes amplifier IC3 to turn on a transistor Q5 which triggers triac GR2 and opens the drain valve. Resistors R37, R45 ensure that amplifier IC3 returns to its initial state only when sufficient water has been drained to reduce the current to its previous normal level. As the water boils away, the electrode current and control voltage decrease until amplifier IC2 is switched and triac GR2 opens the drain valve again. The level to which the boiler is drained before a further filling cycle begins is determined by the setting of a resistor RV1 in the circuit of amplifier IC1. The feed, boil, drain cycle will then be repeated automatically. An additional electrode is located in the boiler so that it carries current only if the water reaches a maximum permissible level. Current is then applied to a Schmitt trigger circuit Q8, Q9 to turn on a triac GR3, actuating an alarm signal and switching on a transistor Q6 which shorts triac GR1 and thus prevents opening of the feed valve. A manual drain switch is connected to terminals 3, 4, 5 to allow complete emptying of the boiler for maintenance. In a second embodiment, Fig. 2 (not shown), an additional feed period is included in the cycle, thereby allowing extra water to be drained from the boiler and thus removing more impurities. The circuit includes Schmitt triggers and a multivibrator in place of the integrated circuits of the first embodiment. Reference has been directed by the Comptroller to Specification 1139911.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1128772A GB1381113A (en) | 1971-05-19 | 1972-03-10 | Automatic control for electrode boilers |
CA142,351A CA981357A (en) | 1971-05-19 | 1972-05-16 | Automatic control for electrode boilers |
FR7217775A FR2138075B1 (en) | 1971-05-19 | 1972-05-18 | |
NL7206863A NL166318C (en) | 1971-05-19 | 1972-05-19 | ELECTRONIC OPERATING SYSTEM FOR AN ELECTRODES STEAM BOILER. |
DE2225398A DE2225398C3 (en) | 1971-05-19 | 1972-05-19 | Method of generating steam |
US3780261D US3780261A (en) | 1971-05-19 | 1972-05-19 | Automatic control for electrode boilers |
CH753172A CH534328A (en) | 1971-05-19 | 1972-05-19 | Electronic control device for a water evaporator with electrodes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1588671 | 1971-05-19 | ||
GB1128772A GB1381113A (en) | 1971-05-19 | 1972-03-10 | Automatic control for electrode boilers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1381113A true GB1381113A (en) | 1975-01-22 |
Family
ID=26248185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1128772A Expired GB1381113A (en) | 1971-05-19 | 1972-03-10 | Automatic control for electrode boilers |
Country Status (7)
Country | Link |
---|---|
US (1) | US3780261A (en) |
CA (1) | CA981357A (en) |
CH (1) | CH534328A (en) |
DE (1) | DE2225398C3 (en) |
FR (1) | FR2138075B1 (en) |
GB (1) | GB1381113A (en) |
NL (1) | NL166318C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2478786A1 (en) * | 1980-03-24 | 1981-09-25 | Eaton Williams Raymond | MULTI-ELECTRODE BOILER |
WO1987003275A1 (en) * | 1985-11-21 | 1987-06-04 | Nautical Services Pty. Ltd. | Electronic control and dosing system for desalinators |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1418994A (en) * | 1973-02-16 | 1975-12-24 | Easton Williams R H | Electrode boiler with automatic control |
CH563000A5 (en) * | 1973-03-09 | 1975-06-13 | Plascon Ag | |
US4084547A (en) * | 1976-03-24 | 1978-04-18 | Honeywell Inc. | Safe start checking liquid processing system |
US4070992A (en) * | 1976-04-23 | 1978-01-31 | Chemed Corporation | Boiler blow down controller |
US4146775A (en) * | 1976-09-16 | 1979-03-27 | Armstrong Machine Works | Automatic control system for an electrode-type air humidifier |
US4347430A (en) * | 1980-02-14 | 1982-08-31 | Michael Howard-Leicester | Vapor generator with cycling monitoring of conductivity |
US4308889A (en) * | 1980-04-30 | 1982-01-05 | Lin Jih Shyan | Electric conductive type steam trap |
US4491146A (en) * | 1982-09-22 | 1985-01-01 | Groen Division/Dover Corporation | Liquid level control |
GB2154896B (en) * | 1984-03-02 | 1987-08-12 | Atlas Air Australia | Air humidifying apparatus |
US4705936A (en) * | 1985-01-17 | 1987-11-10 | Masco Corporation | Electronically controlled electric steam humidifier |
GB9303582D0 (en) * | 1993-02-23 | 1993-04-07 | Eaton Williams Group Ltd | Electrode boilsers with automatic control |
US5932937A (en) * | 1998-03-31 | 1999-08-03 | Lancer Partnership, Ltd. | Power control system |
USPP12228P2 (en) | 1999-06-01 | 2001-11-27 | Florfis Ag | Geranium plant named ‘Fislulu’ |
CA2807799A1 (en) * | 2010-08-09 | 2012-02-16 | Aldozkar D' Herrera Naranjo | Device for heating liquid and generating steam |
KR102552073B1 (en) * | 2018-02-02 | 2023-07-06 | 현대자동차주식회사 | Method for diagnosis level sensor fault of fuel battery watertrap and control device using the same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2006631A (en) * | 1931-04-09 | 1935-07-02 | Eaton Milton | Means for regulating electric steam generators |
US3209125A (en) * | 1962-11-01 | 1965-09-28 | Keeney Mfg Company | Humidifier |
US3269364A (en) * | 1964-03-03 | 1966-08-30 | Bradley C Higgins | Automatic adjustable electric control of mineral contents for blowdown in a boiler |
US3446937A (en) * | 1965-10-23 | 1969-05-27 | Max Hugentobler | Water heater for coffee machines |
US3408941A (en) * | 1967-04-13 | 1968-11-05 | Kenneth G. Sorensen | Tank filling control circuit |
US3523175A (en) * | 1968-05-27 | 1970-08-04 | Ernest F Gygax | Humidifier |
US3605798A (en) * | 1970-04-02 | 1971-09-20 | Carl P Green | Water level controls for steam tables and the like |
US3671142A (en) * | 1970-06-22 | 1972-06-20 | Lumenite Electronic Co | Liquid level control |
-
1972
- 1972-03-10 GB GB1128772A patent/GB1381113A/en not_active Expired
- 1972-05-16 CA CA142,351A patent/CA981357A/en not_active Expired
- 1972-05-18 FR FR7217775A patent/FR2138075B1/fr not_active Expired
- 1972-05-19 NL NL7206863A patent/NL166318C/en not_active IP Right Cessation
- 1972-05-19 US US3780261D patent/US3780261A/en not_active Expired - Lifetime
- 1972-05-19 CH CH753172A patent/CH534328A/en not_active IP Right Cessation
- 1972-05-19 DE DE2225398A patent/DE2225398C3/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2478786A1 (en) * | 1980-03-24 | 1981-09-25 | Eaton Williams Raymond | MULTI-ELECTRODE BOILER |
WO1987003275A1 (en) * | 1985-11-21 | 1987-06-04 | Nautical Services Pty. Ltd. | Electronic control and dosing system for desalinators |
US4877489A (en) * | 1985-11-21 | 1989-10-31 | Nautical Services Pty. Ltd. | Electronic control and dosing system for desalinators |
Also Published As
Publication number | Publication date |
---|---|
US3780261A (en) | 1973-12-18 |
FR2138075A1 (en) | 1972-12-29 |
DE2225398B2 (en) | 1980-05-29 |
CA981357A (en) | 1976-01-06 |
DE2225398C3 (en) | 1981-02-12 |
NL166318C (en) | 1981-07-15 |
NL7206863A (en) | 1972-11-21 |
CH534328A (en) | 1973-02-28 |
FR2138075B1 (en) | 1973-07-13 |
DE2225398A1 (en) | 1972-12-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |