Patent ID: 6292103
Filing Date: 2001-09-18
Classification: H01L

Abstract:
A alarm system for detecting waste liquid discharge blockage in an machine, comprising:a discharge line connected to a plurality of outlets of the machine to receive a waste liquid discharged, wherein a section of the discharge line under a connection of the discharge line and a lowest outlet is selected for use as a sensing region, and the discharge line in the sensing region is angled from a horizontal in a range of about 185 to 265 degrees so that the waste liquid flows smoothly;a sensing line having a first pipe and second pipe, both arranged in the sensing region, wherein a first angle between the first pipe and the discharge line of the sensing region is in a range of about 95 to 175 degrees when the discharge line of the sensing region is vertical and a second angle between the second pipe and the discharge line of the sensing region is in a range of about 95 to 175 degrees when the discharge line of the sensing region is vertical to prevent the waste liquid from flowing into the sensing region when no blockage exists;at least a sensor located in the sensing line, wherein the sensor outputs a sensor signal when detecting any waste liquid; andan alarm connected to the sensor which transmits a warning signal when receiving the sensor signal.