Live component temperature conditioning device providing fast te

Thermal measuring and testing – Thermal testing of a nonthermal quantity

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374 57, 324158F, G01N 2500

Patent

active

047877529

ABSTRACT:
A temperature conditioning device acheives a fast rate of temperature change in air or gas applied to stress thermally an electronic component by establishing separate cold and hot gas paths from a two-way directing valve interior the device cabinet to a nozzle assembly retaining the gas of selected temperature around the electronic component. An evaporation coil of a mechanical refrigeration system chills the air or gas in the cold gas path interior the cabinet and a tube heater adjusts the air or gas temperature in the cold gas path to that selected. A quartz enveloped nickel-chrome filament heater adjacent the nozzle assembly heats the air or gas in the hot gas path to the temperature selected. A by-pass path in the cabinet continuously convey air or gas around the directing valve to the cold gas path continuously to bathe the cold gas path with chilled air or gas, maintaining the cold gas path ready to supply chilled air or gas and preventing backflow of moist, ambient air to the evaporation coil where the moisture can condense and freeze to block the air or gas flow.

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