초록 ▼

Air flows to the conditioned space through a cool air duct and a warm air duct which feed a common delivery duct. The inlet of the cool air duct is connected to a cool air supply duct of a parent system; and inlet of the warm air duct communicates with the return air plenum. Flow control components

Air flows to the conditioned space through a cool air duct and a warm air duct which feed a common delivery duct. The inlet of the cool air duct is connected to a cool air supply duct of a parent system; and inlet of the warm air duct communicates with the return air plenum. Flow control components are air actuated and are controlled by actuators responding to a varying air pressure control signal, which is the output of a thermostat in the conditioned space producing a varying signal pressure signal related to varying temperatures. Dampers in the cool air duct and warm air duct provide for alternative air flow from either of these ducts to the delivery duct. The volume of air flow in the cool air duct is controlled by a modulating damper which responds to a selected signal pressure range. The air flow in the warm air duct is controlled by a fan and dampers, controlled through change of the signal pressure in either direction relative to a selected signal level. An electric heater in the delivery duct is energized and de-energized in response to change of the signal pressure in either direction relative to another selected signal level, whereby this heater is energized only in conjunction with air flow through the warm air duct.

대표청구항 ▼

A system for controlling the conditioning and delivery of air to a conditioned space comprising a cool air duct for connection to a cool air supply duct; a warm air duct for communication with a return plenum; a delivery duct connected to both said cool air and warm air ducts for delivering air to t

A system for controlling the conditioning and delivery of air to a conditioned space comprising a cool air duct for connection to a cool air supply duct; a warm air duct for communication with a return plenum; a delivery duct connected to both said cool air and warm air ducts for delivering air to the conditioned space; a thermostat control device for providing a varying control signal related to the varying temperature of the air in the conditioned space; coupled discharge damper means for said cool air duct and said warm air duct, shiftable between a first condition wherein said cool air duct is open and said warm air duct is closed, and a second condition wherein said cool air duct is closed and said warm air duct is open; a fan disposed in said warm air duct for effecting air flow from the return plenum to said delivery duct; a variable flow control device disposed in said cool air duct for varying the air flow therein between maximum and minimum flow conditions; first actuator means responsive to said thermostat signal for controlling said variable flow control device; second actuator means responsive to said thermostat signal for controlling said discharge damper means and said fan; said second actuator means being operative in one condition to start said fan simultaneously with the opening of said warm air duct discharge damper means; and being operative in another condition to stop said fan simultaneously with the closing of said warm air duct discharge damper means. A system for controlling the conditioning and delivery of air to a conditioned space comprising a cool air duct for connection to a cool air supply duct; a warm air duct for communication with a return plenum; a delivery duct connected to both said cool air and warm air ducts for delivering air to the conditioned space; a thermostat control device for providing a varying control signal related to the varying temperature of the air in the conditioned space; damper means for said warm air duct for allowing air flow from the return plenum to said delivery duct and for preventing reverse flow therein; a fan disposed in said warm air duct for effecting air flow from the return plenum to said delivery duct; variable flow control damper means disposed in said cool air duct for varying the air flow therein between maximum flow and no flow conditions; first actuator means responsive to said thermostat signal for controlling said variable flow control damper means; second actuator means responsive to said thermostat signal for controlling said damper means and said fan; said second actuator means being operative in one condition to start said fan simultaneously with the closing of said cold air duct damper means; and being operative in another condition to stop said fan simultaneously with the opening of said cold air duct damper means.