Carrier Corporation

Other

Cooper Industries, Inc.

William E Clark

Donald C Wellman

Carl C Herb

Milton H Coleman

Reginald S Greene

James Carucci

Roy E Swain

The difference between the zone temperature and the scheduled setpoint, or .DELTA.t, is the basic data from each zone. Communication between the air handler control and the air terminal control is provided via the air system control so that the system is temperature, rather than pressure, responsive.

Differential temperature control

Electrical plug assembly

An electrical plug assembly providing internal, adjustable gripping means and sealing means for electrical cords of various sizes. The internal, adjustable gripping means is a three-jaw grip assembly using pie-shape jaws which are slidably mounted on tracks and moved towards and away from the center of plug body to form a gripping circle around cords of various sizes. The cord seal consists of a notched rubber bushing formed between two rings. As the cover is tightened over the clamping jaws, the rings on either sides of the rubber bushing are urged together causing the bushing to collapse inward and seal the cord. The cord seal also provides means for locking the cord seal in place and increasing torque needed to remove the cover.

An insulating liner for an electrical plug which fits between the plug body and the plug assembly when conductors are located. The liner rotates within the plug body and is retained in the plug body by a tab and groove.

Insulating liner for an electrical plug assembly

The difference between the zone temperature and the scheduled setpoint, or .DELTA.t, is the basic data from each zone. Communication between the air handler control and the air terminal control is provided via the air system control so that the system is temperature, rather than pressure, responsive. The same temperature air is supplied to each zone in amounts sufficient for ventilation requirements independent of temperature requirements. The amount of air supplied beyond the ventilation requirements is controlled to achieve terminal satisfaction. The terminals are sampled to determined their satisfaction and their responses are requested as votes for either heating or cooling. Whether the system supplies heated or cooled air is determined by the voting.

Method for controlling an air distribution system using .DELTA.T

A bleed thermostat is provided with structure for determining at least one position of the bleed plate and therefore, the registration of the opening with the bleed port at that point. By selecting the full registration position, a condition indicative of terminal dissatisfaction is sensed. Additionally, in one embodiment, structure is provided for making the thermostat either direct acting or reverse acting to permit its use in either a heating or a cooling mode.

Thermostatic transducer

A zoned variable volume system is provided with a pair of non-connected dampers in each zone. The first damper controls flow through a cooling coil. The second damper controls flow through a heating coil and provides heated or neutral air depending upon whether or not the heating coil is actuated. The fan speed is adjusted to cause at least one damper to be fully open so that the system operates at a minimum static pressure. The system is adapted to provide tenant metering by determining the amount of conditioned air provided to each zone. Each zone is controlled through a single temperature and flow sensor.

Variable volume multizone system

Apparatus is provided in conjunction with a small radar unit, for providing an improved display and additional radar target information. A ball type compass has an optical switching circuit for providing azimuth signals indicating the azimuth orientation of the radar unit. An inclinometer has an optical switching circuit for providing a target inclination signal from which, knowing target range, target altitude is calculated. A radar display in the form of an array of LCD or LED elements is provided.

Radar tracking system and display

A zoned variable volume system is provided with a pair of non-connected dampers in each zone. The first damper controls flow through a cooling coil. The second damper controls flow through a heating coil and provides heated or neutral air depending upon whether or not the heating coil is actuated. The fan speed is adjusted to cause at least one damper to be fully open so that the system operates at a minimum static pressure.

In each zone of a variable volume air distribution system, terminal satisfaction is determined. Responsive to the determination of the number of dissatisfied terminals, the air handling unit is controlled to minimize the output of the air handling unit while providing a predetermined degree of terminal satisfaction. The determination of the satisfaction of the terminals is based upon a direct or indirect sensing of temperature in the zones.

Air terminal--air handler interface

A variable volume multizone unit is disclosed for simultaneously supplying variable amounts of cool, warm or neutral air to each zone, as required. The unit is under the overall control of a computer and controls dampers located at the unit to regulate the flow of cool and neutral or warm air to each zone individually and to control the total amount of air supplied to all of the zone.

Variable volume multizone unit

A zone whose air supply volume and character is responsive to temperature data supplied from a single location in the zone is made responsive to the requirements of a subzone remote from the sensor location. The air supply to the subzone is changed responsive to an unsatisfied condition therein resulting in a changed supply to the area in which the sensor is located. As a result, the sensor responds to the changed air supply by indicating an unsatisfied condition to which the system responds by changing the amount of air supplied to the zone.

Subzone diverter control

Method of operating a variable volume multizone air conditioning unit

In a VAV terminal local control loop including a bellows controlled orifice in which the bellows inflation is controlled by a bleed thermostat, a signal is produced indicative of terminal satisfaction/dissatisfaction which can be used in controlling the air handler. Specifically, the position of the opening in the bleed plate is detected and compared with the position of the bleed plate permitting the maximum amount of conditional air to be supplied by the terminal to the zone. A signal indicating whether or not the bleed plate is in the maximum bleed position is generated which can be used to furnish information for controlling the air handler.

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Syracuse, NY, United States of America

William E Clark