Thermal measuring and testing – Thermal testing of a nonthermal quantity – Of susceptibility to thermally induced deteriouration – flaw,...
Reexamination Certificate
1999-08-05
2001-05-08
Bennett, G. Bradley (Department: 2859)
Thermal measuring and testing
Thermal testing of a nonthermal quantity
Of susceptibility to thermally induced deteriouration, flaw,...
C374S045000, C073S865600, C073S865800, C436S147000
Reexamination Certificate
active
06227701
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a thermal testing apparatus using a turbulent plate, and in particular to an apparatus installed with a turbulent plate near a heat source so as to precisely test an electronic device in an environment with a uniform temperature.
DESCRIPTION OF THE PRIOR ART
Generally, the problems of a hot box for testing an electronic device are:
(a) The structure of the hot box is complicated, and temperatures measured at different sites in the hot box are not uniform.
(b) The heat in the hot box is easily lost by way of a lead wire electrically connected between the electronic device and a power supply located outside of the hot box.
(c) An electronic device, such as a portable computer, located in the hot box is not easily inspected from outside of the hot box.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide an apparatus for thermally testing an electronic device solving the above mentioned problems. The present invention mainly comprises a main body and a pallet. The main body is formed with a first chamber for receiving the electronic device and a second chamber located around and communicating with the first chamber, wherein the second chamber has an opening communicating the first chamber with the outside of the main body. The pallet, having a base for supporting the electronic device within the first chamber and a window for inspecting the status of the electronic device, is received into the main body through the opening, thereby closing off the first chamber from the outside of the main body. A heat source is installed in the second chamber, and at least one turbulent plate is disposed near the heat source. A plurality of fans are installed in the second chamber and activated to form a circulation between the first chamber and the second chamber. A controlling device mounted on the main body controls the heat source and the wobbling rate of the turbulent plate depending on the temperatures sensed in the first chamber and the second chamber, so that the temperatures in the vicinity of the electronic device are uniform.
According to an aspect of the invention, the electronic device such as a portable computer is electrically connected to a power supply located outside of the main body. A through hole formed in the pallet and filled with heat insulation serves as a passage for the lead wire. Each of the heat insulators has corrugated surfaces and the lead wire is clamped therebetween.
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Bennett G. Bradley
Birch & Stewart Kolasch & Birch, LLP
Inventec C'orporation
Verbitsky Gail
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