Commutation wind pipe for cooker hood

Abstract

A rectifying wind barrel of a cooker hood is provided with a rectangular shape, comprising a fume canal base plate, an upper cover, a left side plate, a right side plate and a turbine housing. An electric motor is fastened on the turbine housing side plate of the rectifying wind barrel, a blade wheel which is covered by the turbine housing is disposed on the electric motor shaft, and a fume rectifying part is disposed in the wind barrel. The rectifying wind barrel rectifies fume by the fume rectifying part, and a wind inlet flow guiding plate is disposed at the initial position; a flow guiding cover is disposed at the upper segment of the fume canal formed by a turbine housing wind inlet side plate and the fume canal base plate; the throat portion of the fume canal outlet is formed by sequentially connecting a wind discharging segment and a wind charging segment of the turbine casing wall, and the turbine housing wind inlet side plate, the wind discharging segment of the turbine housing changes to a curve surface from the housing wall horizontal center, the wind charging segment of the turbine housing wall changes to a curve surface from a folding point upwards, the part of the turbine housing wind inlet side plate adjacent to the throat portion changes to a curve surface from the horizontal center; and a valve sheet protrudes in the connection barrel on the wind outlet throat portion. The invention is provided with a simple structure, big extraction force, energy saving little turbulent current forming probability.

Description

technical field [0001] The invention belongs to the technical field of range hoods, in particular to a rectifying air cylinder used for range hoods to reduce smoke turbulence. Background technique [0002] At present, the known side-suction type, oblique side-type household range hoods and commercial range hoods are all radial-flow side-inlet structural forms, and the separated oil fume airflow is as follows: Figure 1~4 As shown, before entering the air inlet, it forms a large area of ​​disordered turbulent flow with the space below the centerline of the volute; between the front of the air inlet and the wall of the air duct, the two lower corners of the 60-80mm air inlet and the air inlet The upper area accounts for 50-59% of the total volume of the air inlet duct, forming a disorderly turbulent space; when the separated oily fume flow enters the inner cavity along the direction perpendicular to the impeller inlet, the air flow aligns with the impeller lock nut and the rais...

AI Technical Summary

Problems solved by technology

[0002] At present, the known side-suction type, oblique side-type household range hoods and commercial range hoods are all radial-flow side-inlet structural forms, and the separated oil fume airflow is as follows: Figure 1~4 As shown, before entering the air inlet, it forms a large area of ​​disordered turbulent flow with the space below the centerline of the volute; between the front of the air inlet and the wall of the air duct, the two lower corners of the 60-80mm air inlet and the air inlet The upper area accounts for 50-59% of the total volume of the air inlet duct, forming a disorderly turbulent space; when the separated oily fume flow enters the inner cavity along the direction perpendicular to the impeller inlet, the air flow aligns with the impeller lock nut and the raised area, forming Disordered turbulent flow; the total loss accounts for 3-5% of the total power

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