Cyclone such as for use in a surface cleaning apparatus

摘要

A cyclone comprises a cyclone chamber having an air inlet, an air outlet, a first end wall, a second end wall and a sidewall, the air inlet has an inlet end having a shape and a cross sectional area in a plane transverse to a direction of airflow through the air inlet, and the air inlet is provided at a first juncture of the sidewall and the first end wall, wherein the first juncture downstream of the inlet is configured to at least approximate a portion of the shape of the air inlet that is adjacent the first juncture.

主权项

1. A cyclone comprising a cyclone chamber having an air inlet, an air outlet, a first end wall, a second end wall, a longitudinal axis extending between the first and second end walls and a sidewall, the sidewall at a location of the air inlet defining a diameter of the cyclone chamber, the air inlet has an inlet end having a shape and a cross sectional area in a plane transverse to a direction of airflow through the air inlet, and the air inlet is provided at a first juncture surface of the sidewall and the first end wall, wherein the air inlet comprises a curved passage provided inside the cyclone chamber, the passage has an inlet end, an outlet end and first and second longitudinally spaced apart sections extending between the inlet and outlet ends of the curved passage, wherein the curved passage is located within the diameter of the cyclone chamber, wherein the first longitudinally spaced apart section is located further longitudinally outward from the second end wall of the cyclone chamber than the second longitudinally spaced apart section and all of an outer surface of the first end wall is located further longitudinally outward than an inner surface of the first longitudinally spaced apart sections of the passage, wherein the first juncture surface extends at an angle to both the sidewall and the first end wall and wherein the first juncture surface downstream of the air inlet approximates the shape of a portion of the air inlet that is adjacent the first juncture surface and wherein the first end wall and the first juncture surface do not extend radially outwardly beyond the sidewall, wherein the first juncture surface is rounded.