Multiple load integrated fluid control units
First Claim
1. A mixed air conditioning fluid control apparatus for an enclosed structure and for a mechanical air conditioning means and an outside air supply and exhaust control means, comprising a conditioning means control channel having a signal input means, an outside air supply and exhaust control channel having a signal input means, demand signal means connected to each of said first and second input means, said conditioning means control channel including an output means adapted to be connected to said conditioning means and developing an output signal related to said demand signal for controlling said conditioning means, said outside air supply and exhaust control channel including output means adapted to be connected to the control means and developing an output signal related to said demand signal for controlling said supply and exhaust control means and having a condition responsive interlock means and a minimum outdoor air setpoint means, said interlock means including a sensor input means and an adjustable setpoint means for generating a control signal at a selected condition and connected in said air supply and exhaust control channel to selectively hold said channel in the standby position, said minimum outdoor air supply means including an adjustable control means connected to said air supply and exhaust control channel to maintain a minimum level air signal independent of said demand signal.
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Accused Products
Abstract
A mixed air conditioning controller is formed as a factory assembled and adjusted unit in a compact housing, with simple and direct input/output field connectors. Various temperature and humidity input devices are field connected to produce a sequenced control of the air dampers and mechanical cooling and heating devices, as well as auxiliary devices. The controller includes a primary input related to room demand, an outside air temperature input, with an interlocked control to the damper, a fan status input, a minimum air supply control and a by-pass switch having a low limit input. The logic network connecting the input/output includes pneumatic switching, pressure selecting and comparing devices of a diaphragm-controlled-orifice construction connected to function as fluidic repeaters, pressure regulating valves and pressure isolating and switching devices. The controller includes a conditioning channel and a damper channel. An outside air interlock controls the damper channel and a presettable switch controls the minimum air supply control. The presettable switch also includes a low limit temperature signal input. An auxiliary output may drive a humidity controller having a conditioning channel and a humidity channel. The humidity controller includes an interlock network connected to transfer the humidity input signal to the conditioning channel and a switch means controlled by the auxiliary output of the temperature controller.
64 Citations
19 Claims
- 1. A mixed air conditioning fluid control apparatus for an enclosed structure and for a mechanical air conditioning means and an outside air supply and exhaust control means, comprising a conditioning means control channel having a signal input means, an outside air supply and exhaust control channel having a signal input means, demand signal means connected to each of said first and second input means, said conditioning means control channel including an output means adapted to be connected to said conditioning means and developing an output signal related to said demand signal for controlling said conditioning means, said outside air supply and exhaust control channel including output means adapted to be connected to the control means and developing an output signal related to said demand signal for controlling said supply and exhaust control means and having a condition responsive interlock means and a minimum outdoor air setpoint means, said interlock means including a sensor input means and an adjustable setpoint means for generating a control signal at a selected condition and connected in said air supply and exhaust control channel to selectively hold said channel in the standby position, said minimum outdoor air supply means including an adjustable control means connected to said air supply and exhaust control channel to maintain a minimum level air signal independent of said demand signal.
- 12. A mixed air conditioning pneumatic control unit having a housing with a plurality pneumatic signal connector means for input/output connectors in an interrelated control system of a mechanical air conditioning means and an outside air supply and exhaust damper means for controlling of the mixed air supplied to an enclosure, comprising a conditioning means control channel having a fluid repeater with a signal pressure input connector means adapted to receive a temperature-related fluid signal, an outside air supply and exhaust control channel having a fluid repeater with a signal pressure input connector means adapted to receive a temperature related fluid signal demand signal means connected to each of said first and second input means, said repeater of said conditioning means control channel including a fluid signal output connector means adapted to be connected to said conditioning means and developing an output signal directly related to said demand signal for controlling said conditioning means, said outside air supply and exhaust control channel including a second fluid repeater connected to a first output of the first fluid repeater of the same channel and to a damper output connector means adapted to be connected to damper means and developing an output signal directly related to said demand signal for controlling said damper means, said exhaust control channel including an outdoor air interlock means and a minimum outdoor air setpoint means, said outdoor interlock means including a pneumatic pressure selector having an outdoor air temperature sensor input connector means and an adjustable setpoint leak-port valve connected to supply a regulated pressure to said selector for generating a fluid switchover signal at a selected temperature and an outdoor interlock fluid switch connected to said pressure selector and to the output of the first fluid repeater of said air supply and exhaust control channel to selectively hold said channel in the standby position, said minimum outdoor air supply means including an adjustable pneumatic leak-port valve connected to said second fluid repeater of said air supply and exhaust control channel to maintain a minimum level signal from said second fluid repeater independent of the level of said demand signal, and a bypass switch having an input coupled to said outdoor interlock fluid switch and an output means connected to said second fluid repeater and to said adjustable pneumatic leak-port valve for selectively by-passing and operatively removing the adjustable pneumatic leak-port valve.
Specification