Abstract: A tubular air cleaner includes a housing, which has a peripheral wall and a bottom wall, an inlet, which is formed in the peripheral wall, an outlet, which is formed in the bottom wall, a filter element, and a partition wall portion. The filter element has a filtration portion and is accommodated in the housing. The partition wall portion forms the inlet together with the peripheral wall. The filter element is arranged eccentrically with respect to the axis of the housing. An air flow path is formed between the filtration portion and the inner peripheral surfaces of the peripheral wall and the partition wall portion. The air flow path has a gradual change portion, in which the distance between the inner peripheral surface of the peripheral wall and the outer peripheral surface of the filtration portion gradually decreases toward the downstream end.

Abstract: An air cleaner includes an upper casing, which has an inlet, a lower casing, which has an outlet and covers the lower opening of the upper casing, and a filter element, which is located inside the upper casing and the lower casing. The lower casing includes a looped application surface, on which an adhesive is applied to adhere the filter element, and a minute protrusion, which extends along the perimeter, is formed on the inner peripheral edge of the application surface.

Abstract: An air cleaner includes an upper casing, which has an inlet, a lower casing, which has an outlet and covers the lower opening of the upper casing, and a filter element, which is located inside the upper casing and the lower casing. The lower casing includes a looped application surface, on which an adhesive is applied to adhere the filter element, and a minute protrusion, which extends along the perimeter, is formed on the inner peripheral edge of the application surface.

Abstract: An air cleaner includes a filter element, which includes a sheet-like filter material having pleats, a housing accommodating the filter element, and an inlet and an outlet, which are provided on the wall of the housing. The wall of the housing includes a first wall portion and a second wall portion, which face each other and are each arranged on one of the ends of the filter element in the direction in which ridges of the pleats extend. A guide piece, which extends along the ridges, is provided in the housing between the inlet and the filter element. The guide piece forms a clearance between the guide piece and the second wall portion, and guides the air that has passed through the clearance toward the first wall portion.

Abstract: A thermoplastic resin molding, which is lightweight and has reduced environmental impact is provided. A thermoplastic resin molding manufacturing method capable of efficiently manufacturing the thermoplastic resin molding and of satisfactorily limiting the occurrence of rust in the injection molding die is also provided. The thermoplastic resin molding may contain a thermoplastic resin and a plant fiber as the main components, and the ratio of thermoplastic resin to plant fiber content may be 7:3 to 4:6. The molding may be obtained by injection molding of a thermoplastic resin composition containing a thermoplastic resin and a plant fiber and having a water content of 0.4% or less.

Abstract: An air cleaner includes a filter element, which includes a sheet-like filter material having pleats, a housing accommodating the filter element, and an inlet and an outlet, which are provided on the wall of the housing. The wall of the housing includes a first wall portion and a second wall portion, which face each other and are each arranged on one of the ends of the filter element in the direction in which ridges of the pleats extend. A guide piece, which extends along the ridges, is provided in the housing between the inlet and the filter element. The guide piece forms a clearance between the guide piece and the second wall portion, and guides the air that has passed through the clearance toward. the first wall portion.

Abstract: A swirl generator is arranged in a duct through which air is sent from the exterior to an air cleaner. The swirl generator has a plurality of guide vanes, which change the flow direction of an air flow. Each of the guide vanes has a guide fin that adjusts the air flow and a deflecting fin that applies swirl force to the air flow. The deflecting fin is configured by an upstream portion and a downstream portion, which are connected together at a predetermined angle. The upstream portion and the downstream portion each have a cross section extending linearly along a cylindrical plane coaxial with a nose cone.

Abstract: A swirl generator is arranged in a duct through which air is sent from the exterior to an air cleaner. The swirl generator has a plurality of guide vanes, which change the flow direction of an air flow. Each of the guide vanes has a guide fin that adjusts the air flow and a deflecting fin that applies swirl force to the air flow. The deflecting fin is configured by an upstream portion and a downstream portion, which are connected together at a predetermined angle. The upstream portion and the downstream portion each have a cross section extending linearly along a cylindrical plane coaxial with a nose cone.