VAV Terminal local control loop

Details VAV Terminal local control loop VAV Terminal local control loop

1983-09-02

1984-11-06

Tapolcai, William E.

Automatic temperature and humidity regulation

Motors

Fluid-operated

137 82, 236 82, 236 94, G05D 2308

Patent

active

044807830

ABSTRACT:
In a VAV terminal local control loop including a bellows controlled orifice in which the bellows inflation is controlled by a bleed thermostat, a signal is produced indicative of terminal satisfaction/dissatisfaction which can be used in controlling the air handler. Specifically, the position of the opening in the bleed plate is detected and compared with the position of the bleed plate permitting the maximum amount of conditional air to be supplied by the terminal to the zone. A signal indicating whether or not the bleed plate is in the maximum bleed position is generated which can be used to furnish information for controlling the air handler.

REFERENCES:
patent: 2523198 (1950-09-01), Davies
patent: 2638875 (1953-05-01), Bowditch et al.
patent: 3192302 (1965-06-01), Keefer
patent: 3207422 (1965-09-01), Best
patent: 3698247 (1972-10-01), Dokl
patent: 3727835 (1973-07-01), Rifkin et al.
patent: 4240580 (1980-12-01), Fehr
patent: 4297899 (1979-11-01), Blaney et al.

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