JPS5739420A - Temperature controlling circuit - Google Patents
Temperature controlling circuitInfo
- Publication number
- JPS5739420A JPS5739420A JP55115138A JP11513880A JPS5739420A JP S5739420 A JPS5739420 A JP S5739420A JP 55115138 A JP55115138 A JP 55115138A JP 11513880 A JP11513880 A JP 11513880A JP S5739420 A JPS5739420 A JP S5739420A
- Authority
- JP
- Japan
- Prior art keywords
- peltier element
- electric power
- power source
- output
- temperature
- 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
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
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
PURPOSE:To simplify the circuit and also to realize a low electric power consumption, by constituting a Peltier element of a single unipolar electric power source. CONSTITUTION:Transistors TR1, TR2 and TR3, TR4 are connected to a Peltier element PT so as to cross to each other, and resistances R6, R7 for providing a potential difference across the Peltier element PT are inserted into the base circuit of the TR2 and TR4. Only a single electric power source +VP is used as an electric power source for the Peltier element. When a detection temperature of a thermistor TH is higher than a set temperature, an output of an operational amplifier OP1 becomes (+), an output of said amplifier OP2 becomes (-), the TR1 and TR2 are operated and the TR3 and TR4 are not operated, therefore, a current flowing to the Peltier element PT executes cooling in the direction as indicated with a white thick arrow, and also magnitude of the current is proportional to an output of the operational amplifier OP1, that is to say, the extent of a temperature variation from the set temperature. When the detection temperature of the thermistor TH becomes lower than the set temperature, a current in the direction as indicated with a black thick arrow flows to the Peltier element PT, and heating is executed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55115138A JPS5739420A (en) | 1980-08-20 | 1980-08-20 | Temperature controlling circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55115138A JPS5739420A (en) | 1980-08-20 | 1980-08-20 | Temperature controlling circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5739420A true JPS5739420A (en) | 1982-03-04 |
Family
ID=14655220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55115138A Pending JPS5739420A (en) | 1980-08-20 | 1980-08-20 | Temperature controlling circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5739420A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61123471U (en) * | 1985-01-21 | 1986-08-04 | ||
GB2382144B (en) * | 2001-07-11 | 2005-10-26 | Siemens Ag | Improved magnetic resonance tomography appliance |
-
1980
- 1980-08-20 JP JP55115138A patent/JPS5739420A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61123471U (en) * | 1985-01-21 | 1986-08-04 | ||
GB2382144B (en) * | 2001-07-11 | 2005-10-26 | Siemens Ag | Improved magnetic resonance tomography appliance |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB950917A (en) | Automatic control circuit for electric heaters | |
JPS5543447A (en) | Hot-wire type flow rate measuring device | |
JPS5339136A (en) | Fixing temperature controlling method | |
KR860001283A (en) | Hot Wire Flow Rate Detection Device | |
JPS5739420A (en) | Temperature controlling circuit | |
JPS5582252A (en) | Water heater | |
JPS5716343A (en) | Thermal conductivity detector | |
GB900329A (en) | Systems for measuring electrolytic conductivity of a liquid | |
JPS57208428A (en) | Temperature detecting device | |
JPS553625A (en) | Magnet driving circuit | |
ES2047927T3 (en) | ELECTRONIC CIRCUIT. | |
JPS55154866A (en) | Current supply circuit for telephone switchboard | |
JPS5731012A (en) | Temperature controlling circuit | |
JPS5442166A (en) | Pressure transmitter | |
GB964355A (en) | A bar-type heating element for electric water heating apparatus | |
JPS559291A (en) | Temperature control unit | |
SU1705808A1 (en) | Temperature regulator | |
JPS57188364A (en) | Liquid temperature controller | |
JPS56152017A (en) | Current controlling system of power source circuit | |
JPS56107966A (en) | Control device for preheating engine | |
JPS56148070A (en) | Device for measuring characteristic of electric circuit | |
JPS55104110A (en) | Alternating current amplifier | |
JPS55158562A (en) | Flow velocity measuring apparatus | |
JPS6432320A (en) | Electric heater | |
JPS5651609A (en) | Input circuit |