Control circuitry for thermoelectric environmental chamber

Details Control circuitry for thermoelectric environmental chamber Control circuitry for thermoelectric environmental chamber

1981-03-25

1982-12-21

Makay, Albert J.

Refrigeration

Using electrical or magnetic effect

Thermoelectric; e.g., peltier effect

62130, 623242, 165 26, F25B 2102, G01K 1300

Patent

active

043642349

ABSTRACT:
Circuitry for controlling the temperature of a thermoelectric environmental chamber includes a pair of digital switches for selecting any desired temperature between -10 degrees C. +79 degrees C., the digital slide switches selecting tap points of a group of series connected resistors forming a feedback loop of an operational amplifier. Three resistors connected in series with the output of the operational amplifier and the feedback resistors produce a plurality of voltages that represent upper and lower limits to tolerance range about the selected desired temperature. These voltages are compared by means of a plurality of comparators to a voltage produced in response to a solid state temperature sensor located in the thermal compartment of the environmental chamber. Decoding circuitry decodes the outputs of the comparators to produce signals which control switching devices that control the direction of current through a thermoelectric heat pumping device.

REFERENCES:
patent: 3232063 (1966-01-01), Eichhorn et al.
patent: 3332807 (1967-07-01), Boehmer et al.
patent: 3616846 (1971-11-01), Wills
patent: 3733836 (1973-05-01), Cormi
patent: 4187093 (1980-02-01), Boratgis et al.
patent: 4313308 (1982-02-01), Boratgis et al.

Affiliated with

Also associated with

Rating

Control circuitry for thermoelectric environmental chamber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control circuitry for thermoelectric environmental chamber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control circuitry for thermoelectric environmental chamber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-401055