초록 ▼

An electronic control system is disclosed to control and to prevent damage to a standalone or a network of oil free, two stage compressor packages. The electronic control system uses pressure and temperature sensors to detect actual shutdown conditions or predict shutdown conditions based on the ope

An electronic control system is disclosed to control and to prevent damage to a standalone or a network of oil free, two stage compressor packages. The electronic control system uses pressure and temperature sensors to detect actual shutdown conditions or predict shutdown conditions based on the operating state of the compressor package and the current temperatures or pressures of the air at strategic locations in the compressor package. It has been determined through experimentation that, if the pressure at the inlet of the stage two compressor is less than the discharge pressure of the stage two compressor by more than an allowable value, then a high temperature condition will occur in the stage two compressor and cause the compressor to seize. It has also been determined the pressure differential occurs first in this situation and that the electronic control system can predict the failure based on the pressure differential data and to shut the compressors down before the stage two compressor failure occurs. The electronic control system then records the shutdown event in an area of nonvolatile memory and displays the reason for the shutdown on a LCD display visible to the compressor operator. A plurality of electronic control systems can be connected in a peer-to-peer network to coordinate control of a plurality of compressors connected to the same air distribution system. A modem connected to the electronic control system supports remote diagnostics, monitoring, and control. Methods for controlling the operation of the compressor packages using the electronic control system are also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.] An electronic control system for controlling the operation of at least one or a network of compressor packages, the system comprising:at least one or a network of oil less, two stage screw compressor packages, operatively connected to a pressure system in which pressure i

[ What is claimed is:] [1.] An electronic control system for controlling the operation of at least one or a network of compressor packages, the system comprising:at least one or a network of oil less, two stage screw compressor packages, operatively connected to a pressure system in which pressure is to be maintained within a predetermined range of possible pressures;measuring means, operatively connected to the first and the second screw compressor stages, for determining the pressure exiting the first and the second compressor stages;processing means, operatively connected to the measuring means for receiving signals from the measuring means, for comparing the determined pressure exiting the first screw compressor and the second screw compressor stages with the predetermined range of possible pressures; andmeans, operatively connected to the oil free, two stage screw compressor package and the processing means, for shutting down the screw compressor package before the screw compressor package is damaged.