Johnson Service Company

Johnson Controls Gmbh

Dennis E Miller

Richard C Watson

Doug Cooke

Sven Adolph

David N AbuJudom, Ii

Ricardo L Fernandez

Carol Lomonaco

Kenneth G Shown

Jude R Anders

Keith H Lengling

Control module for a personal environment system

Air distribution housing for a personal environment system

Supplied air fan and electronics unit for a personal environment system

Desk top air diffuser for a personal environment system

An SME actuator is provided by a housing (14), a plunger (12) axially reciprocal in the housing, a compression spring (16) or Belleville washers (60) biasing the plunger in one direction, SME (shape memory effect) disc washers (18) around the plunger and thermally deformable to move the plunger in the opposite direction, and a concentric electrical resistance heater (36) and/or fluid inlet and outlet ports (8, 10 or 86, 88) for thermally actuating the SME disc washers to in turn move the plunger. Multi-position control is provided by a stack of a plurality of SME Belleville disc washers of differing transition temperatures. Alternatively, the washers can all have the same transition temperature and operate proportionally with increasing or decreasing temperatures. Another version is provided by an SME torsion bar (96) and threaded drive element (104) for axially translating the plunger (112).

SMF actuator

Heating, ventilating and air conditioning control systems commonly use pneumatic actuators. A digital logic control has first and second output ports applied to control the actuator through dual channels, including an air supply channel and an air exhaust channel. Various sensed and related input signals are processed by the logic device and generate control signals at the control signal ports. Each channel includes an electrically controlled switch unit having an electrical operator and a pneumatic switch for controlling the flow to and from the pneumatic actuator. The switch may take the form of an electromagnetically actuated flow valve opening and closing a flow path from a supply or exhaust to the pneumatic actuator or, in the case of the supply channel, the form of a small electrically operated pump unit. The actuation of the actuator is controlled either on a time or frequency basis to set the actuator in the proper position. Pneumatic restrictor means in output lines to the actuator provide fluid rate control to and from the actuator.

Pneumatic switch control for pneumatic actuator in air conditioning

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Greendale, WI, United States of America

Dennis E Miller