Abstract: An oil mist eliminator includes an impeller rotating about its axis in one direction within a casing having an inlet and an outlet. The impeller includes a plurality of circumferentially spaced blades held between front and rear discs. The front disc has a center opening for introducing an oil-contaminated air. Each blade is composed of an inner fin extending in a radial direction and an outer fin bent from the inner fin for deflecting the air proceeding between the adjacent inner fins in a forward direction, thereby creating a forced air flow for introducing the air axially from the front opening, guiding it radially between the discs, and venting it axially forwardly in a front-in and front-out fashion. Thus, even a portion of the air being guided immediately along the rear disc can be successfully deflected for collision against the outer fins without fail, maximizing oil separation efficiency.

Abstract: A grease filter capable of separating the oil particles at an increased efficiency only with the use of a fan of small capacity. The grease filter includes a frame supporting a plurality of baffles spaced in a row. Each baffle has a generally V-shaped cross-section with first and second walls which merge into a bent. The grease filter is arranged to have the bents opposed to each other and to locate the first and second walls, respectively on upstream and downstream sides of the filter, thereby forming upstream passages between the first walls of the adjacent baffles and forming downstream passages between the second walls of the adjacent baffles. The baffles are configured such that the upstream passage has a width which is narrower towards a downstream end of the upstream passage than at an upstream end of the upstream passage, and that the downstream passage has a width which is greater than the width of the upstream passage at the downstream end thereof.

Abstract: A grease extractor includes a centrifugal fan for forcibly flowing grease laden air in order to remove grease therefrom in cooperation with a trap member. The grease extractor comprises a vessel with an inlet for introduction of the grease laden air and an outlet for discharging clear air. The fan, which has a rotation axis and has a circumferential fan surface, is disposed between the inlet and the outlet to be rotated about a rotation axis so as to generate a forced flow of the air for introducing the grease laden air inwardly and flowing it radially outwardly through the circumferential fan surface. The fan includes impellers which deflects the grease laden air to separate the grease therefrom and coagulate it into corresponding grease particles. Flow converting members are provided on the circumferential fan surface for converting the radial air flow into an axial flow directed outwardly substantially along the rotation axis.

Abstract: A grease extractor includes a fan for forcibly flowing grease laden air to remove grease therefrom in cooperation with a membrane filter and a trap member. The grease extractor comprises a vessel with an inlet for introduction of the grease laden air and an outlet for discharging clear air removed of the grease. The membrane filter is disposed in a flow path between an inlet and an outlet of the extractor to seize the grease while passing the grease laden air therethrough. A trap member is disposed downstream of the membrane filter to deflect the air to cause collision of the grease laden air against the trap member to deposit the grease thereon. The trap member is formed with a recovery line for collecting and draining the deposit grease out of the vessel.

Abstract: A grease extractor incorporating a plurality of oblique baffles disposed within a barrel in angularly displaced relation with a longitudinal axis of the barrel. The oblique baffles intercross with each other at the longitudinal axis and are arranged in spaced and angularly displaced relation with each other so as to define within the confines of the barrel a plurality of congruent flow paths extending generally spirally about said longitudinal axis. When the grease-laden fumes are drawn into the grease extractor, they are forced to follow said flow paths as whirling about the longitudinal axis to move at ever-changing velocities, whereby the grease particles entrained in the fumes are subject to centrifugal action during the substantially entire course of flow to impinge continuously on the oblique baffles and the inner surface of the barrel to be deposited thereon.