Multiple load integrated fluid control units
First Claim
1. An interrelated control apparatus for separately and selectively conjointly controlling a plurality of different load means, comprising first and second channels for providing separate load controls, a demand signal means connected to each of said channels for simultaneously signaling each channel, said first channel having an output means adapted to be connected to a first load and having a first means for developing an output signal related to said demand signal, said second channel including an output means adapted to be connected to a second load and having a second means for developing an output signal related to said demand signal, said second channel having an interlock means and a minimum load setting means, said interlock means including an override sensing input means and an adjustable setpoint means for generating a control signal at a selected sensed condition and said an interlock means connected in the second of said channels to selectively hold said channel in a standby position, and said minimum load setting means including an adjustable control means and connected to said second channel to maintain a minimum load setting 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.
13 Citations
4 Claims
- 1. An interrelated control apparatus for separately and selectively conjointly controlling a plurality of different load means, comprising first and second channels for providing separate load controls, a demand signal means connected to each of said channels for simultaneously signaling each channel, said first channel having an output means adapted to be connected to a first load and having a first means for developing an output signal related to said demand signal, said second channel including an output means adapted to be connected to a second load and having a second means for developing an output signal related to said demand signal, said second channel having an interlock means and a minimum load setting means, said interlock means including an override sensing input means and an adjustable setpoint means for generating a control signal at a selected sensed condition and said an interlock means connected in the second of said channels to selectively hold said channel in a standby position, and said minimum load setting means including an adjustable control means and connected to said second channel to maintain a minimum load setting signal independent of said demand signal.
Specification