Local conditioning induction-type apparatus employing primary inlet air as a power means for controlling temperature

Claim 1

An induction-type air conditioning system of the type employing first heat exchanger means for cooling air, second heat exchanger means for heating air and a respective pair of pipes for each heat exchanger means to conduct temperature-treated fluid to and from said heat exchanger means, said system comprising: a housing; a source of primary air including: plenum means located in said housing for conducting said primary air, and nozzle means for issuing a primary air stream from said plenum means; means defining an air flow passage in said housing, said air flow passage being positioned to receive the primary air stream from said nozzle means and to direct said primary air stream externally of said housing; means defining an aspiration opening into said air flow passage, said aspiration opening being oriented to permit secondary air to be aspirated therethrough by said primary air stream flowing in said air flow passage; means defining first, second and third air inlets into said housing, said first heat exchanger means being positioned in the path of said first air inlet to cool air entering said housing via said first air inlet, said second heat exchanger means being positioned in the path of said second air inlet to heat air entering said housing via said second air inlet, said third air inlet serving as a by-pass inlet to permit entry of untreated air into said housing; first actuable damper means movable between extreme opened and closed positions to proportion air inflow through said first air inlet and having a front surface configured to block air flow through said first air inlet when said first damper means is in its closed position, said first damper means also including a rear surface; first bias means for continuously urging said first damper means towards its opened position; a first actuator compartment located in said housing and defined on at least one side by the rear surface of said first damper means; first inflatable and expansible actuator means disposed in said first compartment for urging said first damper means towards its opened position to a degree determined by the degree of inflation of said first actuator means; second actuable damper means movable between extreme opened and closed positions to proportion air inflow through said second air inlet and having a front surface configured to block air flow through said second air inlet when said second damper means is in its closed position, said second damper means also including a rear surface; second bias means for continuously urging said second damper means towards its opened position; a second actuator compartment located in said housing and defined on at least one side by the rear surface of said second damper means; second inflatable and expansible actuator means disposed in said second compartment for urging said second damper means towards its opened position to a degree determined by the degree of inflation of said second actuator means; cOntrol means for controllably inflating and deflating said first and second actuator means with primary air, said control means including thermostatic valve means responsive to the temperature in an environment being conditioned by said primary air stream for inflating one and deflating the other of said first and second actuator means with primary air; third actuable damper means movable to two extreme closed positions through an opened position to proportion air inflow through said third air inlet; linkage means for connecting said first and second damper means to said third damper means such that said third damper means is in its opened position and permits maximum air flow through said third air inlet when both of said first and second damper means are closed.