An air inlet ring, a fan system and a range hood using the air inlet ring

Abstract

The invention discloses an air inlet ring, which includes a fixed plate and a flow guide part arranged on the inner periphery of the fixed plate, and is characterized in that: the flow guide part includes at least two corner blocks, each corner block Arranged upwards at intervals, an elastic film is arranged between two adjacent corner blocks, and the corner block is fixedly connected with the adjacent elastic film, so that the corner block and the elastic film form a complete flow guide part, and the corner block It can move in the radial direction of the air inlet ring with the change of the external atmospheric pressure, thereby changing the size of the guide part. Also disclosed are a fan system using the air inlet ring and a range hood using the fan system. Compared with the prior art, the present invention has the advantages that: by enabling the size of the guide part of the air inlet ring to be adjusted according to the change of the current atmospheric pressure, the flow resistance can be adaptively reduced, the operation is stable, and the flow smoothness is improved.

Description

technical field [0001] The invention relates to a power device, in particular to an air inlet ring, a fan system using the air inlet ring, and a range hood using the fan system. Background technique [0002] The multi-blade centrifugal fan has the characteristics of high pressure and low noise. Therefore, the current society generally uses the multi-blade centrifugal fan system as the power source, and uses the high-speed rotating impeller to complete the two functions of acting and filtering in the volute. As it is commonly used in range hoods, the oil smoke is sucked and exhausted through the multi-blade centrifugal fan installed inside the range hood. The multi-blade centrifugal fan includes a volute, an impeller installed in the volute and a motor that drives the impeller to rotate. When the impeller rotates, the The center of the fan generates negative pressure suction, sucking the fumes under the range hood into the fan, and after being accelerated by the fan, it is co...

AI Technical Summary

Problems solved by technology

[0003] At present, the range hoods on the market are all designed to work under atmospheric pressure conditions, but my country has a huge land area, and the distribution of altitude and atmospheric pressure is quite different. For areas with low atmospheric pressure, the range hood cannot work. Reaching the pressure and air volume under ideal working conditions will affect the smoke exhaust effect of the range hood. At present, the market is pursuing a larger air volume and air pressure, and there is less consideration for the actual working environment of the range hood, which is very easy to occur. The effect of range hoods in different regions is significantly different, the above problems will seriously affect the work of range hoods, make customers doubt the performance of range hoods, and affect customer experience

[0004] With the continuous improvement of the quality of life, range hood manufacturers continue to pursue large air volume and high wind pressure in order to obtain better range hood effects, and use high wind pressure to forcibly blow the lampblack into the public flue, in order to obtain better user experience. Experience, the existing technology generally obtains better oil absorption effect by increasing the size of the air duct, impeller, motor and other components, improving the performance of the motor, etc. These methods greatly increase the cost, and only the size of a single component is enlarged , the overall performance is still at the same level, wasting resources, and at the same time, if the size of the components is increased, it will affect the kitchen design

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