Filter screen, range hood and cooking fume filtering method

Abstract

The invention relates to a filter screen. The filter screen comprises a frame, a first filter screen, a second filter screen and a driving mechanism, the first filter screen and the second filter screen are rotationally connected to the two opposite ends of the frame correspondingly, the area of the first filter screen and the area of the second filter screen are matched with the area of the through-flow face of the frame, the driving mechanism is in driving connection with the first filter screen and the second filter screen and can drive the first filter screen and the second filter screen to rotate, and then the included angles of the first filter screen and the second filter screen relative to the overflowing face are adjusted. The contact area of the filter screen and cooking fume can be adjusted so as to be matched with different filtered matter conditions. The invention further relates to a range hood which comprises a body with a cooking fume channel and the filter screen, the filter screen is arranged in the cooking fume channel of the body, and the frame is matched with the inner wall face of the cooking fume channel. The invention further relates to a cooking fume filtering method of the range hood. The cooking fume filtering method can realize effective balance of cooking fume purification, wind resistance and noise.

Description

technical field [0001] The invention relates to a filter screen, a range hood using the filter screen, and a method for filtering oil fumes of the range hood. Background technique [0002] The range hood is essential as a necessary kitchen appliance in the family. It can discharge some oily fumes and harmful gases generated during the cooking process. It is an essential appliance for indoor cleaning of the kitchen. [0003] The filter structure in the existing range hood usually adopts the structure of the filter screen, and the filter screen is arranged at the inlet position of the range hood. In order to improve the oil fume absorption effect, the filter layer device usually adopts a multi-layer filter screen structure, such as the Chinese invention patent application "A Oil Fume Purification System" with the publication number CN112212379A (application number 202011204976.2), in which the disclosed oil fume separation net includes the outer The grids of the layer wind ne...

AI Technical Summary

Problems solved by technology

In order to improve the oil fume absorption effect, the filter layer device usually adopts a multi-layer filter screen structure, such as the Chinese invention patent application "A Oil Fume Purification System" with the publication number CN112212379A (application number 202011204976.2), in which the disclosed oil fume separation net includes the outer The grids of the layer wind net, the middle layer wind net and the inner layer wind net, and the grids of the outer wind net, the middle wind net and the inner wind net are arranged staggeredly to form a zigzag air duct. Although this structure improves the filtering effect to a certain extent , but the flow area of ​​the oil fume through the oil fume separation net is small, which affects the air volume of the range hood and the effect of the oil fume

Another example is the Chinese utility model patent "Stainless Steel Wire Oil Filter Plate" with the authorized announcement number CN209530364U (application number 201920152020.9), in which the disclosed oil filter plate also includes a multi-layer structure and adopts a mesh structure, which is then used to remove the oil in the oil fume. Small particles of oil are blocked to achieve filtration. This structure is prone to clogging, and it is not convenient for users to clean

In addition, this type of oil fume filter structure has a fixed number of filter layers and a fixed contact area with the oil fume, especially when the amount of oil fume is large, the resistance of the flue will be increased during the oil fume filtering process, and the range hood will be reduced. Excellent oil fume absorption performance, but at the same time there will be excessive noise

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