Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1999-07-22
2000-09-05
Paschall, Mark
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219483, 219486, 219505, 219494, 307117, H05B 102
Patent
active
061146714
ABSTRACT:
A system for and a method of controlling the temperature of an object (22). Temperature sensors (30) are placed on the object (22) in abutting zones (24) substantially covering a surface of the object (22), so as to detect a temperature in each of the respective zones (24). Temperature adjusting elements (28) are spaced from and thermally coupled to the object (22), to adjust the temperatures of corresponding ones of the respective zones (24). Temperature control circuits (32, 34, 36), responsive to temperatures detected by respective ones of the temperature sensors (30), control the corresponding ones of the temperature adjusting elements (28) to maintain the temperatures of the respective zones (24) within a preset temperature range. When the object (22) is in a cold environment and is to be maintained at a warmer temperature, the temperature adjusting elements (28) are heating elements. Conversely, when the object (22) is in a warm environment and is to be cooled, the temperature adjusting elements (28) are cooling elements. In a preferred embodiment, the number of zones (24) and temperature sensors (30) is equal to the number of temperature adjusting elements (28).
REFERENCES:
patent: 3956612 (1976-05-01), Ballard et al.
patent: 4560431 (1985-12-01), Inselmann
patent: 5258601 (1993-11-01), Takano
patent: 5900177 (1999-05-01), Lecouras et al.
"Telescope Thermal Design" and "Main Tube Thermal Control" from pp. A96 through A-99, including pp. A98a and A98b, from Orbiting Solar Laboratory (OSL)Best and Final Offer, prepared for NASA by TRW Federal Systems Division, Space & Technology Group (Sep. 14, 1990).
Marcus Bruce D.
Pohner John A.
Wehner James W.
Wehner Michael J.
Paschall Mark
TRW Inc.
Yatsko Michael S.
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