Automatic temperature and humidity regulation – Ventilator type – Electrically actuated
Patent
1998-01-15
1999-12-14
Bennett, Henry
Automatic temperature and humidity regulation
Ventilator type
Electrically actuated
622592, 165 803, 361695, 454184, F24F 700
Patent
active
060006234
ABSTRACT:
A cooling system for a host device affords enhanced reliability using multiple blower units mounted in parallel between a low pressure plenum and a high pressure plenum and a control system that senses when a blower unit is failing or has failed and responds by shutting down the failed unit and increasing the speed of the remaining blowers to maintain the air flow volume delivered to the cooling path. To maintain the integrity of the cooling air path while affording continuous operation of the host device, a spring biased closure door seals the access opening through which the blower is mounted when a blower unit is removed and displaced by the blower unit to an inoperative position against the biasing force of the spring when the blower unit is installed or replaced. To prevent recirculation through a vacated blower unit mounting space, a one way air flow device, in the form of a shutter assembly including plural pivoting louvers or vanes is mounted at the exhaust location of each blower. Thus the cooling air delivery is maintained and a blower unit can be removed for maintenance or replacement without interruption or impairment of host device operation.
REFERENCES:
patent: 4756473 (1988-07-01), Takemae et al.
patent: 4767262 (1988-08-01), Simon
patent: 5493474 (1996-02-01), Schkrohowsky et al.
patent: 5540548 (1996-07-01), Eberhardt et al.
patent: 5745041 (1998-04-01), Moss
patent: 5787971 (1998-08-01), Dodson
Blatti Kenneth George
Clark Mark Garrison
Green Todd Douglas
Kang Sukhvinder Singh
Lund David George
Bennett Henry
Bussan Matthew J.
International Business Machines - Corporation
Lahtinen Robert W.
Norman Marc
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