Automatic temperature and humidity regulation – Ventilator type – Mechanical linkage actuated
Patent
1988-03-17
1989-04-04
Wayner, William E.
Automatic temperature and humidity regulation
Ventilator type
Mechanical linkage actuated
165 22, 361384, F24F 700
Patent
active
048178659
ABSTRACT:
A ventilation arrangement for a modular enclosure for electronic circuits includes a ventilation fan (8) including a motor (10) for providing movement of cooling air in the modular enclosure, the motor (10) being operable at at least two speeds including a lower speed and a higher speed wherein the higher speed induces greater air movement than the lower speed. A plurality of modular compartments (1, 2, 3, 4, 5) house a corresponding plurality of electronic circuits, with each of the modular compartments including an air path for the cooling air moved by the ventilation fan (8). A plurality of temperature sensors (32, 34, 36, 38, 40), one situated in each of the modular compartments (1, 2, 3, 4, 5), individually sense the temperature in each of the compartments. A speed control circuit (66), responsive to each of the temperature sensors causes the motor (10) to operate at the lower speed if the temperature in each of the modular compartments is below a predetermined threshold and causes the motor (10) to operate at the higher speed if the temperature in any one or more of the modular compartments exceeds the predetermined threshold. In this manner, if any of the modular compartments requires additional ventilation, the speed of operation of the motor (10) is increased to provide the required additional ventilation.
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Miller Jerry A.
Racal Data Communications Inc.
Wayner William E.
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