Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Plenum type
Patent
1990-08-17
1992-01-14
Tapolcai, William E.
Automatic temperature and humidity regulation
Mixing fluid of dissimilar temperature
Plenum type
454229, 454236, G05D 2313
Patent
active
050802828
ABSTRACT:
An air conditioning apparatus comprises an automatically controlled mixing box for an air conditioning system wherein a triple inlet mixing box has a cold air inlet, a hot air inlet, a return air inlet, and a fan for inducting and disbursing the air mixed therein. Thermostatic motors regulate the first and second dampers having a configuration which controls opening or closing of the hot air inlet, the return air inlet, and the cold air inlet in such a manner that the air mixture may be regulated from cold to neutral to hot without any direct mixture of the cold air and the hot air at any time. The fan draws in the air from the open or partially open inlet openings to mix the same and discharge the mixture to the room. Several fan-powered mixing boxes may be incorporated to create a multizone system with each zone regulated by a thermostat to mix the return air with hot or cold air to supply the desired zone temperature. In a dual inlet embodiment of the fan-powered mixing box, the return air duct is connected to the hot air duct outside the mixing box and a portion of the hot air duct serves as the inlet for both hot air and return air. Dampers are positioned within the return air duct and the hot air duct. Inside the mixing chamber, the open ends of the hot air duct and cold air duct are positioned to be opened and closed by a single damper controlling both the hot air inlet and cold air inlet without any direct mixture of the cold air and the hot air at any time.
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patent: 4352453 (1982-10-01), McNabney
patent: 4605160 (1986-08-01), Day
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Mosely Neal J.
Tapolcai William E.
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