Automatic temperature and humidity regulation – Ventilator type
Patent
1977-09-26
1979-04-03
Wayner, William E.
Automatic temperature and humidity regulation
Ventilator type
98 33R, 165 16, 361381, 55217, H01B 734, H01L 2504
Patent
active
041472993
ABSTRACT:
An air flow system for a disk file is disclosed in which air is pumped under pressure past the disk surfaces to remove contaminants and past a voice coil actuator to cool the motor and returned to an inlet in the pump. A thermostatically controlled air diverter is placed in the air circulating path to reduce the range of temperature change in the disks and thus minimize the track misregistration problems which might occur as a result of differential thermal expansion of the disks and related components. The thermostatically controlled diverter valve functions to control the volume of normally lower temperature ambient air entering the system by controlling the volume of air exhausted from the system in accordance with the temperature of the air being circulated.
The system functions as a closed loop system at startup time allowing a faster warmup period and can operate as a completely open loop system if the ambient temperature is relatively high, the degree of openness of the system being a function of the ambient temperature and the amount of heat being dissipated by the components being cooled.
REFERENCES:
patent: 1972315 (1934-09-01), Ramey
patent: 2167472 (1939-07-01), Bedford
patent: 3740735 (1973-06-01), Gabor
patent: 3870227 (1975-03-01), Attridge, Jr.
Cummins Richard E.
International Business Machines - Corporation
Wayner William E.
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