JPS5778918A - Filter for oily smoke - Google Patents

Abstract

PURPOSE: To enhance a collecting efficiency for fat and oil contents of smoke and perform collection and exhaust smoothly by a method wherein tubular bodies in the form of truncated pyramids are placed in a box in multiple stages with gaps therebetween and in such a manner that the sizes of the bodies thereof decrease in the upward direction, and rectifying plates are projectingly provided on the inside wall of the box.

CONSTITUTION: The oil smoke sucked-in via an inlet port 9 is compressed by slanted inside surfaces of the truncated puramid shaped tubular body 11 at the lowermost stage, then it is allowed to expand immediately upon passing through an upper part of the body 11, and part of the smoke passes through the gap 13 and is diffused into the interior of the box 8. The remainder of the smoke moves upwardly into the tubular body 11 at the second stage, then it is subjected to compression and expansion alternately and repeatedly while parts thereof sequentially pass through the gaps 13 and are diffused in the box 8. As a result, the fat and oil contents in the smoke are trapped at the inside and outside surfaces of the tubular bodies 11. Although the smoke passed through the gaps 13 diffuses and tends to form a turbulent flow or a vortex, it is rectified by the rectifying plates 18 and is caused to flow to the outlet port 11 side as upward flows. The upward flows are controlled by primary and secondary flow-stabilizing frame 20 to enhance the efficiency in trapping the fat and oil contents.

COPYRIGHT: (C)1982,JPO&Japio