The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 1998
Filed:
Feb. 07, 1997
Yoshiaki Hori, Tokai, JP;
Yasuo Akitsu, Handa, JP;
NGK Insulators, Ltd., , JP;
Abstract
A control system for a dust collecting apparatus including an upright housing arranged above a dust storage bin, a ceramic filter assembly disposed within the housing to collect dust particles from exhaust gases supplied into a bottoms portion of the housing located upstream thereof, and a reverse washing mechanism mounted on the housing downstream of the filter assembly to cause the collected dust particles to fall into the dust storage bin from the filter assembly when it is activated, wherein temperature (T1) and pressure (P1) of the exhaust gases supplied into the housing upstream of the filter assembly, temperature (T2) and pressure (P2) of purified gases discharged from the filter assembly into an upper portion of the housing located downstream of the filter assembly and a flow quantity (Q1) of the purified gases discharged from the housing downstream of the reverse washing mechanism are detected to calculate an average temperature T=f(T1, T2), a flow quantity �(Q=f(Q1. T)!, viscosity (.eta.=f(T) and a pressure loss coefficient K=f(.DELTA.P, Q, .eta.) of the exhaust gases passing through the filter assembly, and wherein the reverse washing mechanism is activated under control of an electronic controller when the calculated pressure loss coefficient (K) becomes more than a predetermined value (K0) and is deactivated when the calculated pressure loss coefficient becomes less than the predetermined value (K0).