Refrigeration – Using electrical or magnetic effect – Thermoelectric; e.g. – peltier effect
Patent
1999-01-08
2000-08-01
Tanner, Harry B.
Refrigeration
Using electrical or magnetic effect
Thermoelectric; e.g., peltier effect
236 78R, F25B 2102, G05D 2300
Patent
active
060949201
ABSTRACT:
A temperature control circuit comprises a temperature detection circuit for detecting the temperature of an object and outputting a temperature detection voltage, a first reference voltage generation circuit for generating a first reference voltage that corresponds to the upper limit of a predetermined suitable temperature range, a second reference voltage generation circuit for generating a second reference voltage that corresponds to the lower limit of the suitable temperature range, a first temperature comparison circuit for comparing the temperature detection voltage with the first reference voltage, a second temperature comparison circuit for comparing the temperature detection voltage with the second reference voltage, a temperature control signal generation circuit for generating a temperature control signal for controlling ON/OFF of a power supply of a cooler based on outputs signals of the first and second temperature comparison circuit, and a temperature control circuit for setting ON/OFF the power supply of the cooler according to the temperature control signal. The temperature control signal generation circuit including two monostable multivibrators generates a pulse oscillation signal when the temperature of the object is between the upper limit and the lower limit, thereby temperature control can be executed precisely only by hardware.
REFERENCES:
patent: 4187093 (1980-02-01), Boratgis et al.
patent: 4283921 (1981-08-01), Prosky
patent: 4325225 (1982-04-01), Price, II
patent: 4364234 (1982-12-01), Reed
patent: 4638850 (1987-01-01), Newell, III et al.
patent: 5603220 (1997-02-01), Seaman
NEC Corporation
Tanner Harry B.
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