APPARATUS FOR CONTAINING COMMUNICATION EQUIPMENT USING MATERIAL WITH POSITIVE TEMPERATURE COEFFICIENT

PROBLEM TO BE SOLVED: To externally start or remove a heater by selectively disposing a heating element, having a plate of a positive temperature coefficient material adjacent to a circuit region. SOLUTION: An external structure or an outer wall 10 for enclosing an equipment is provided in an enclos...

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Bibliographic Details
Main Authors PLAZA DANIEL, AAKULA NANDAKUMAR G, TRUONG HAN Q
Format Patent
LanguageEnglish
Published 30.11.1999
Edition6
Subjects
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
PRINTED CIRCUITS
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Summary:PROBLEM TO BE SOLVED: To externally start or remove a heater by selectively disposing a heating element, having a plate of a positive temperature coefficient material adjacent to a circuit region. SOLUTION: An external structure or an outer wall 10 for enclosing an equipment is provided in an enclosure unit 8 for housing an electronic equipment or a communication equipment. An access door 12 is provided so as to go into a unit interior, and a plurality of heat radiating fins 14 are fixed to the outer wall of the unit. Electronic sub-units 20, 22 for placing circuits are contained in the enclosure. Heating elements 30, 40, made of thermistors having a positive temperature coefficient(PTC) or a resistance material, are provided in an enclosure adjacent to the circuit. The PTC heating elements have one or a plurality of plates of the PTC thermistor or the resistance materials provided between a pair of electrodes. Thus, a passive control can be performed over an entire temperature range, and a heater output is not reacted with an input voltage, so that it can be used for a variety of apparatuses.
Bibliography:Application Number: JP19990101966