Efficient high blast pressure range hood

Abstract

The invention discloses an efficient high blast pressure range hood. The efficient high blast pressure range hood is characterized in that: a draught fan is arranged in a range hood outer shell; the outer shell of the draught fan is connected and sealed with the range hood outer shell; a lead air channel and a mold cavity are connected and assembled to form the outer shell of the draught fan; an air inlet and an air outlet of the draught fan are on the same axis; a motor of the draught fan is fixed in the outer shell of the draught fan; the motor drives a wind wheel connected with a motor shaft to rotate in the mold cavity of the draught fan; a large-sized LED lamp panel is arranged at the lower part inside the range hood outer shell; the interval between the large-sized LED lamp panel and the range hood outer shell forms an air inlet of the range hood; the distance zone between the large-sized LED lamp panel and the range hood outer shell end face forms an air inlet guide zone of the range hood; a guide air channel is arranged in front of an air inlet end of the wind wheel of the draught fan; a plurality of guide plates are arranged at the back of an air outlet end of the wind wheel; the sectional area of an air inlet of the wind wheel is smaller than the sectional area of an air outlet of the wind wheel; the radial section of each blade of the wind wheel is convex, and the convex direction is the rotating direction of the wind wheel.

Description

technical field [0001] The invention relates to a range hood, in particular, the air inlet and outlet of the fan of the range hood are on the same axis, the cross-sectional area of ​​the air outlet of the fan wheel is larger than the cross-sectional area of ​​the air inlet, and the drainage technology and the diversion technology are adopted to achieve high efficiency and high efficiency. Air pressure range hood. Background technique [0002] At present, most of the known range hood fans use centrifugal fans with 90° rotation angles at the air inlet and outlet. This type of fan has high power consumption, low work efficiency, and low wind pressure. The maximum static pressure of the machine is basically lower than 450 Pascals, and the specified air volume (7m specified in the national standard GB / T17713-2011 3 / min) when the static pressure is less than 300 Pascals. Nowadays, there are more and more high-rise buildings, and the lower static pressure parameters of the known...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the known range hood fans use centrifugal fans with 90° rotation angles at the air inlet and outlet. This type of fan has high power consumption, low work efficiency, and low wind pressure. The maximum static pressure of the machine is basically lower than 450 Pascals, and the specified air volume (7m specified in the national standard GB / T17713-2011 3 / min) when the static pressure is lower than 300 Pascal

Nowadays, there are more and more high-rise buildings, and the lower static pressure parameters of the known range hoods determine that the known range hoods cannot be used in the kitchens of high-rise buildings, because the total length of the flue in high-rise buildings is relatively large, and the internal structure of the pipeline is complicated. At the same time, the use of the range hood is relatively concentrated, and many factors lead to a large wind resistance in the building's public smoke exhaust duct. For example, the actual calculation of a 15-storey building assumes that the flue height is 50 meters, and the flue cross section is 250mm* 400mm, according to 8 users at the same time, the exhaust air volume is 10m 3 According to the calculation of the range hood per minute, the total resistance of the pipeline is 322.97 pascals under the ideal state of smoothness and no bending in the pipeline, while the static pressure of the known range hood at the specified air volume is basically lower than 300 pascals, and it is difficult to overcome the smoke during work. The air resistance in the duct leads to a sharp drop in the exhaust air volume of the range hood, making it impossible to effectively discharge the oil fume

Images