The present invention discloses a smoke filter device, which comprises a plurality of oil filter sections (10), each oil filter section (10) has at least two filter holes (11); and in the two adjacent two filter holes (11), an area defined by the filter hole (11) near the at the end of the oil filter section (10) is smaller than an area defined by the filter hole (11) near the middle portion of the oil filter section (10). The present invention also discloses to a range hood with the smoke filter device. In the present invention, without changing the overall air volume, the suction force of the filter holes at the end of each oil filter section is increased, so that the smoke can be further prevented from escaping to the surrounding.

The present invention discloses a smoke filter device, which comprises a plurality of oil filter sections (10), each oil filter section (10) has at least two filter holes (11); and in the two adjacent two filter holes (11), an area defined by the filter hole (11) near the at the end of the oil filter section (10) is smaller than an area defined by the filter hole (11) near the middle portion of the oil filter section (10). The present invention also discloses to a range hood with the smoke filter device. In the present invention, without changing the overall air volume, the suction force of the filter holes at the end of each oil filter section is increased, so that the smoke can be further prevented from escaping to the surrounding.

Described is a stacked-plate apparatus having a plurality of plates stacked along an axis and having gaps between adjacent plates, each of which act as flow passageways for flow of fluid from a fluid inlet to a fluid outlet. Pairs of adjacent plates comprise one and optionally two lips, which extend axially into the flow passageway at the fluid inlet, thereby narrowing an inlet gap between the plates at the fluid inlet. The lips enhance the flow of fluid towards the fluid outlet of the flow passageway, for at least a working distance downstream thereof, as compared to a pair of adjacent plates that does not have the lips.

A vent filter and a Radio Remote Unit having the vent filter. The vent filter includes a first member including a first body having a ventilation path extending through the first body, an inner wall constituting a ventilation hole which is communicated with the ventilation path, and an outer wall constituting a gap between the inner wall and the outer wall. The vent filter also includes a second member including a second body and at least one enclosure wall protruding out from the second body, wherein at least one of the at least one enclosure wall is located outside the outer wall and surrounding the outer wall. Both the inner and outer walls have at least one first groove at an end and each of the at least one enclosure wall has at least one second groove at an end.

A vent filter and a Radio Remote Unit having the vent filter. The vent filter includes a first member including a first body having a ventilation path extending through the first body, an inner wall constituting a ventilation hole which is communicated with the ventilation path, and an outer wall constituting a gap between the inner wall and the outer wall. The vent filter also includes a second member including a second body and at least one enclosure wall protruding out from the second body, wherein at least one of the at least one enclosure wall is located outside the outer wall and surrounding the outer wall. Both the inner and outer walls have at least one first groove at an end and each of the at least one enclosure wall has at least one second groove at an end.

An air cleaner and an oil mist filter are disclosed. The air cleaner includes a main body, and a filter device. The filter device includes at least one dust filter configured to filter external air and an oil mist filter configured to filter oil mist. The oil mist filter includes a stationary filter including a plurality of first baffles, and a movable filter including a plurality of second baffles respectively corresponding to the plurality of first baffles. The movable filter is movably disposed on one side of the stationary filter to be moved to first or second position. The oil mist filter is provided with a first air path in the first position, the first and second baffles are positioned closest to each other. The oil mist filter is provided with a second air path in the second position, the first and second baffles are farthest away from each other.

This disclosure relates a fluid filter whose pores are created by raised structures on a base. The raised structures may be macro, micro and/or nanometer scale structures. The structures can be configured in myriad ways to control flow rate and extracted particle size of a filtering system. Typically a plurality of filter panels will be stacked to form a filtering unit.

A filter medium includes a plurality of layers each including an undulating strip of solidified material.

Disclosed is a particulate matter (PM) capturing and collecting filter device having a target-coated liquid film. More specifically, disclosed is a PM particle capturing and collecting filter device having a target-coated liquid film in which a spreading phenomenon in which a liquid material spreads outside the filter is suppressed. Disclosed is a filter device for capturing and collecting PM particles, in which a liquid film having interface energy control and capillary force induction is used for effective PM particle capturing and collecting, and a surrounding portion is formed for preventing spreading of a liquid material on a substrate.

Disclosed is a particulate matter (PM) capturing and collecting filter device having a target-coated liquid film. More specifically, disclosed is a PM particle capturing and collecting filter device having a target-coated liquid film in which a spreading phenomenon in which a liquid material spreads outside the filter is suppressed. Disclosed is a filter device for capturing and collecting PM particles, in which a liquid film having interface energy control and capillary force induction is used for effective PM particle capturing and collecting, and a surrounding portion is formed for preventing spreading of a liquid material on a substrate.