HONEYCOMB FILTER

• Main Authors: KURODA YUYA, SADAOKA KAZUO, NAKAYAMA ATSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 05.04.2018
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; LIME, MAGNESIA; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; REFRACTORIES; SEPARATION; SLAG; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF NATURAL STONE; WEAPONS

PROBLEM TO BE SOLVED: To provide a honeycomb filter which can reduce an initial pressure loss.SOLUTION: A barrier wall part 210Wio between an inlet flow passage 210 and an outlet flow passage 220 in a honeycomb structure 201 has irregularity on an inner surface of the inlet flow passage 210. The honeycomb structure 201 has an outlet flow passage side part R2 from a surface of the outlet flow passage 220 to a depth D (D is a half of a minimum thickness of the barrier wall part 201Wio), and an inlet flow passage side part R1 between the outlet flow passage side part R2 and a plurality of inlet flow passages 210. When a porosity of the inlet flow passage side part R1 is εand a porosity of the outlet flow passage side part R2 is ε, ε<εis satisfied.SELECTED DRAWING: Figure 5 【課題】初期の圧力損失を低減できるハニカムフィルタを提供する。【解決手段】ハニカム構造体２０１における入口流路２１０と出口流路２２０との間にある隔壁部２１０Ｗｉｏは、入口流路２１０の内面に凹凸を有する。ハニカム構造体２０１は、出口流路２２０の表面から深さＤ（ただし、Ｄは隔壁部２０１Ｗｉｏの最小厚みの半分）までの出口流路側部分Ｒ２と、出口流路側部分Ｒ２と複数の入口流路２１０との間の入口流路側部分Ｒ１とを有し、入口流路側部分Ｒ１の空隙率をε１とし、出口流路側部分Ｒ２の空隙率をε２としたときに、ε１＜ε２を満たす。【選択図】図５