Apparatus suited for ventilating rooms contaminated with infecti

Details Apparatus suited for ventilating rooms contaminated with infecti Apparatus suited for ventilating rooms contaminated with infecti

1994-06-10

1998-06-09

Ford, John K.

Refrigeration

Using electrical or magnetic effect

Thermoelectric; e.g., peltier effect

62 33, 62 36, 62 37, 62 90, 62 95, 165 54, 165 111, 165246, 165234, 454238, F24H 300, F24F 1102, F24F 1104

Patent

active

057619085

ABSTRACT:
A self-contained ventilation apparatus is disclosed for ventilating buildings, e.g., patient rooms such as hospital rooms, waiting rooms, hospital operating rooms, doctors' offices, and clinics, especially rooms contaminated with infectious microorganisms. One or more blowers is provided. When there are two blowers, a first blower is provided for discharging room air to the atmosphere and a second blower is provided for introducing fresh outside air to the room to provide a continuous supply of fresh air to the room which is free of disease organisms. Both streams of air pass through an air-to-air heat exchanger to adjust the temperature of the incoming air to approach that exhausted from the room. When filters are used, both currents of air are preferably filtered, e.g., with a high efficiency particle air (HEPA) filter. Provision is made for automatically maintaining room air pressure at the desired value (typically below that of surrounding rooms) as filters gradually become clogged with dust. Supplemental heat or cold is supplied to incoming air by locating semiconductive thermoelectric cooling modules between incoming and outgoing air streams. Optional thermoelectric modules also dehumidify or warm incoming air depending on the season.

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