Nartron Corporation

Other

Williams International

James W Powell

Mark G Voss

John F Hurley

Edward O Hartel

Bryan N Waineo

James E Powell

An environmental control system disclosed includes a refrigeration loop including a two stage centrifugal compressor having an inlet and an outlet, a condenser having an inlet connected with the compressor outlet and an outlet, and an evaporator having an inlet connected with said condenser outlet and an outlet connected with the compressor inlet, a motor for rotating the compressor, control means responsive to evaporator load for establishing the rate of rotating said compressor, a controllable expansion valve in communication with the refrigeration loop, an expansion valve control to control the setting of the expansion valve, a bypass valve in communication with the refrigeration loop and also in communication with one stage of the compressor, wherein the bypass valve is selectively openable to allow circulated refrigerant to be variably communicated to the stage in communication therewith, and wherein the setting of the expansion valve is also a function of bypass valve operation.

Environmental control system

An environmental control system disclosed includes a refrigeration loop including a variable speed compressor having an inlet and an outlet, a condenser, an evaporator and variable speed evaporator fan, temperature setpoint apparatus, recirculated air temperature sensor, evaporator, air inlet temperature sensor and an evaporator fan speed control for establishing the speed of the evaporator fan as a function of the desired air temperature and the recirculated air temperature and a compressor speed control for establishing the speed of the compressor as a function of at least the evaporator air inlet temperature and speed of the evaporator fan.

An environmental control system disclosed includes a refrigeration loop including a variable speed compressor having an inlet and an outlet, a condenser having an inlet connected with the compressor outlet and an outlet, and an evaporator having an inlet connected with the condenser outlet and an outlet connected with the compressor inlet. The system also includes a variable speed evaporator fan and evaporator fan control for controlling the speed of the evaporator fan and a monitor for monitoring the superheat condition of the refrigerant at the compressor inlet wherein the evaporator fan control controls the speed of the evaporator fan as a function on the value of the superheat condition. A variable speed condenser fan is controlled by a condenser fan speed control that functions in part on the value of the superheat condition.

An environmental control system disclosed includes a refrigeration loop including a variable speed compressor having an inlet and an outlet, a condenser, an evaporator and variable speed evaporator fan for moving air across the evaporator, a compressor speed control, a superheat monitor for monitoring the condition at the inlet of the compressor and a primary superheat control responsive to the superheat monitor for establishing the speed of the evaporator fan to maintain a predetermined superheat condition.

A refrigeration system utilizes a small high speed centrifugal compressor driven by a directly coupled, high frequency, electric motor. The motor has a double-ended shaft which supports the rotors of low pressure and high pressure centrifugal compressor stages. The motor operates in the refrigerant atmosphere so as to eliminate the requirement for rotating shaft seals. High frequency power (3750 Hz) is supplied to the motor, which runs at 75,000 RPM. The system utilizes a novel flash intercooler between the compressor stages.

Refrigeration system with high speed, high frequency compressor motor

Apparatus for directing a predetermined and measured quantity of food to be distributed with a fish pond to systematically and periodically feed and distribute food therewithin to permit an individual absenteeism from such chores. The organization includes a bin to contain a reservoir and supply of feed therewithin with a blower motor and blower fan removed from the bin to prevent contamination of the motor from dust and debris from within the bin. A slotted conduit within the bin receives feed and wherein the feed is directed exteriorly of the bin by a pressurized conduit and coupling to direct pressurized air within the slotted conduit and direct such feed exteriorly of the bin onto the associated fish pond.

Growing community of inventors

Hartland, MI, United States of America

James W Powell