FR2427025A1 - Electric convector heater thermostat including differential amplifier - has photosensor between transistor base and emitter, latter in series with thermistor - Google Patents
Electric convector heater thermostat including differential amplifier - has photosensor between transistor base and emitter, latter in series with thermistorInfo
- Publication number
- FR2427025A1 FR2427025A1 FR7815073A FR7815073A FR2427025A1 FR 2427025 A1 FR2427025 A1 FR 2427025A1 FR 7815073 A FR7815073 A FR 7815073A FR 7815073 A FR7815073 A FR 7815073A FR 2427025 A1 FR2427025 A1 FR 2427025A1
- Authority
- FR
- France
- Prior art keywords
- emitter
- thermistor
- series
- photosensor
- differential amplifier
- 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
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The electric heating system control is dependent on the local lighting conditions. The heater is normally convective and includes a local temperature sensor. The control circuit is based on an NPN transistor (T) having a photosensitive element (L) connected between its base and emitter, the emitter being in series with a thermistor (TH). Preset adjustment is by a variable resistance directly across the transistor, further adjustment being by another adjustable resistor in the emitter to supply connection. Triac switching of heaters is via amplifiers (A1; A2) driven from the transistor emitter potential.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7815073A FR2427025A1 (en) | 1978-05-22 | 1978-05-22 | Electric convector heater thermostat including differential amplifier - has photosensor between transistor base and emitter, latter in series with thermistor |
FR7822395A FR2432255A2 (en) | 1978-05-22 | 1978-07-28 | Electrical heating system including convectors with thermostats - has control circuit error compensated and including photosensor associated with transistor and potentiometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7815073A FR2427025A1 (en) | 1978-05-22 | 1978-05-22 | Electric convector heater thermostat including differential amplifier - has photosensor between transistor base and emitter, latter in series with thermistor |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2427025A1 true FR2427025A1 (en) | 1979-12-21 |
FR2427025B1 FR2427025B1 (en) | 1981-06-26 |
Family
ID=9208513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7815073A Granted FR2427025A1 (en) | 1978-05-22 | 1978-05-22 | Electric convector heater thermostat including differential amplifier - has photosensor between transistor base and emitter, latter in series with thermistor |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2427025A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2476424A1 (en) * | 1980-02-19 | 1981-08-21 | Finimetal | IMPROVED ELECTRONIC THERMOSTAT, ESPECIALLY FOR THE CONTROL OF AN ELECTRIC CONVECTOR |
FR2492062A1 (en) * | 1980-10-14 | 1982-04-16 | Urbelec | Automatic controller for kitchen ventilator fan - responds to room illumination by using relay to switch ventilator fan motor off between mains and triac controlled by photodetector circuit |
EP0116486B1 (en) * | 1983-01-07 | 1991-01-09 | David Bensoussan | Electronic controller of the application of electric power to a temperature variation device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1005175A (en) * | 1961-05-31 | 1965-09-22 | Wilkinson Sword Ltd | Improvements in or relating to temperature controllers |
DE2121871A1 (en) * | 1971-05-04 | 1972-12-07 | Eberle Werke Kg | Room temperature controller with light-dependent guidance |
US4060123A (en) * | 1976-09-27 | 1977-11-29 | Fabri-Tek Incorporated | Energy saving temperature control apparatus |
FR2353896A1 (en) * | 1976-06-05 | 1977-12-30 | Danfoss As | THERMOSTAT CAP FOR VALVE OF A HEATING BODY |
-
1978
- 1978-05-22 FR FR7815073A patent/FR2427025A1/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1005175A (en) * | 1961-05-31 | 1965-09-22 | Wilkinson Sword Ltd | Improvements in or relating to temperature controllers |
DE2121871A1 (en) * | 1971-05-04 | 1972-12-07 | Eberle Werke Kg | Room temperature controller with light-dependent guidance |
FR2353896A1 (en) * | 1976-06-05 | 1977-12-30 | Danfoss As | THERMOSTAT CAP FOR VALVE OF A HEATING BODY |
US4060123A (en) * | 1976-09-27 | 1977-11-29 | Fabri-Tek Incorporated | Energy saving temperature control apparatus |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2476424A1 (en) * | 1980-02-19 | 1981-08-21 | Finimetal | IMPROVED ELECTRONIC THERMOSTAT, ESPECIALLY FOR THE CONTROL OF AN ELECTRIC CONVECTOR |
EP0034535B1 (en) * | 1980-02-19 | 1984-10-17 | FINIMETAL, Société dite | Electronic thermostat, especially for electric convector control |
FR2492062A1 (en) * | 1980-10-14 | 1982-04-16 | Urbelec | Automatic controller for kitchen ventilator fan - responds to room illumination by using relay to switch ventilator fan motor off between mains and triac controlled by photodetector circuit |
EP0116486B1 (en) * | 1983-01-07 | 1991-01-09 | David Bensoussan | Electronic controller of the application of electric power to a temperature variation device |
Also Published As
Publication number | Publication date |
---|---|
FR2427025B1 (en) | 1981-06-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2767293A (en) | Temperature control system | |
GB1467654A (en) | Tape heater | |
KR830008655A (en) | Thermostat | |
ATE124525T1 (en) | CONTROL IN COMBINATION WITH A THERMOSTAT DEVICE. | |
FR2427025A1 (en) | Electric convector heater thermostat including differential amplifier - has photosensor between transistor base and emitter, latter in series with thermistor | |
GB1055644A (en) | Improvements in or relating to automatically controlled cooking apparatus | |
GB1425262A (en) | Temperature control systems | |
ES8100729A1 (en) | Temperature regulating device for electric heating apparatus | |
ATE16524T1 (en) | HEATING SYSTEM WITH HEAT ACCUMULATION. | |
GB1161830A (en) | Improvements in and relating to Electric Heating Devices. | |
GB664644A (en) | Improvements relating to devices employing thermo sensitive resistances for regulating the output voltages of amplifiers | |
SE8503990D0 (en) | TEMPERATURE CONTROL DEVICE FOR A REAR OVEN | |
FR2370933A1 (en) | Linear central heating control system - includes linearity compensating system with outdoors and feed water temp. sensors | |
GB1326883A (en) | Temperature regulating means | |
GB1174561A (en) | Improvements in or relating to Control Apparatus | |
JPS6454687A (en) | Hot air blower with automatic voltage switching | |
GB690245A (en) | Improvements in and relating to electrical heating devices and automatic temperaturecontrol systems therefor | |
SE332469B (en) | Device for temperature-dependent control of the energy supply to electric heaters | |
GB907565A (en) | Improvements in temperature responsive control | |
FR2432255A2 (en) | Electrical heating system including convectors with thermostats - has control circuit error compensated and including photosensor associated with transistor and potentiometer | |
GB1298203A (en) | Temperature compensator bridge circuit | |
GB1141889A (en) | Pulsed electric heating system | |
SU932477A2 (en) | Microcircuit temperature regulator | |
GB1120716A (en) | Control of fluid-fuel-fired heaters especially space heaters | |
FR2407437A1 (en) | Combination central heating radiator - has hot water tubes for fan assisted convection with electrical element for additional heating |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |