F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
236/13
F24F 13/10 (2006.01) F24F 11/053 (2006.01) G05D 7/03 (2006.01) G05D 23/185 (2006.01)
Patent
CA 1265771
AIR CONDITIONING CONTROL SYSTEM WITH ENHANCED OPERATING RANGE ABSTRACT A control for an air conditioning system comprises a flow sensor and a condition sensor in the form of a thermostat controlling a pivotal lever which in turn sets a pressure at a control orifice for an actuator which operates the control damper in an air supply duct. The flow signal is obtained by upstream and downstream pres- sure taps adjacent an orifice in the duct and the tempera- ture signal is obtained in a conventional manner and applied to the pivotally supported control lever via a diaphragm, push rod, reset spring, etc. In order to enhance the operating range of the control a variable area orifice means is provided and may comprise a pair of swingable vanes adjacent the fixed orifice and the upstream and downstream pressure taps. The vanes may be moved to open and closed positions, modulated therebetween and they may be under the control of an on-off manual valve or alternatively they may respond to the second condition or temperature sensor.
500310
Anemostat Products Division Dynamics Corporation Of America
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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