Near suction type extractor hood

Abstract

The invention discloses a near suction type extractor hood. The near suction type extractor hood comprises a shell, a machine case located above the shell and a draught fan system. The shell comprisesa panel which is located at the front end and inclines relative to the horizontal direction. The panel is provided with an opening, and the opening becomes an air inlet of the extractor hood. The near suction type extractor hood is characterized in that the draught fan system comprises a first ternary draught fan and a second ternary draught fan which are connected in parallel, the draught fan system is arranged in the machine case, filter nets are arranged at a first air inlet of the first ternary draught fan, a second air inlet of the second ternary draught fan and / or the opening in the panel, and the filter nets are provided with circular net holes. The net holes are designed into the circular holes, and noise generated when cooking fume penetrates through the filter nets is lowered; and through limitation of the net hole arranging manner, the net hole size and the distance between the net holes, the air inlet area of the filter nets is guaranteed.

Description

technical field [0001] The invention relates to kitchen appliances, in particular to a near-suction range hood. Background technique [0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Generally, range hoods include top-suction and near-suction range hoods. Near-suction range hoods use vortex wind pressure to move away, and absorb most of the fumes that are close to the stove in an arc, which can reduce adverse effects on human health. Influence, and the power source is closer to the stove, basically it will not reduce the suction effect of the power source. [0003] For example, the Chinese patent application number 201120392664.9 discloses a suction range hood, which includes a housing with a forward-inclined smoking port, and an exhaust assembly facing the oil suction port is obliquely arranged in the housing, and the oil suction port is also inclined. There is a filter assembly, and the filter assembly includes a filter scre...

AI Technical Summary

Problems solved by technology

[0004] In the scheme of the prior art as mentioned above, the mesh of the filter screen is elongated, and the noise generated when the oil fume passes through the filter screen is relatively large; in addition, since there is only one filter screen, the filtering effect is poor, and the grease cannot be filtered out when it enters the fan. Complete filtration before the system; moreover, since the multi-blade centrifugal fan is usually used, and the multi-blade centrifugal fan is placed in the lower triangle, in order to ensure a high air intake efficiency, the volume of the fan system is relatively large

This arrangement of the fan, because the impeller has a pre-rotation effect on the gas and the direction of the gas will gradually change during the 90° turning process of the gas flowing into the impeller, the simple consistent inlet and outlet angles are not good for the actual working ability of the impeller; In addition, the fan is far away from the air outlet pipe, it is difficult to overcome the resistance of the pipe, the fan faces the user directly, lacks noise reduction measures, and the noise is high

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