Check valve and smoke exhauster

Abstract

The invention provides a check valve and a smoke exhauster. The check valve comprises a valve body. A flue is arranged in the valve body. The valve body is provided with a flue inlet and a flue outlet which are communicated with the flue. The end, close to the flue inlet, of the inner wall face of the flue is provided with vortex cutting ribs. The vortex cutting ribs are arranged on the check valve so as to cut large-size and high-energy vortexes formed by soot flowing out of a centrifugal fan of the smoke exhauster at high speed at the flue inlet of the check valve and a centrifugal fan volute tongue, so that the vortexes are dispersed into small vortexes, small in size and easy to dissipate, and the small vortexes are gradually dissipated when flowing in the flue. Accordingly, the problem of noise or vibration caused when vortexes have too high energy and too large size is avoided, and the smoke exhauster noise is reduced.

Description

technical field [0001] The invention relates to the field of kitchen utensils, in particular to a check valve and a range hood with the check valve. Background technique [0002] With the further tightening of the national standard on the operating noise control indicators of range hoods, the market puts forward the requirement to improve the operating noise of range hoods in order to reduce the sound power value and improve the sound quality. However, the current design of the range hood check valve Most of them only consider the prevention of flue gas backflow and the degree of sealing during the process of extracting fumes, and have not paid much attention to additional functions such as noise reduction and sound quality improvement, especially for the spiral suction range hoods currently on the market. When the flue gas reaches the connection between the centrifugal fan and the check valve, due to the change of the flow area, the flue gas will flow in a large vortex stat...

AI Technical Summary

Problems solved by technology

[0002] With the further tightening of the national standard on the operating noise control indicators of range hoods, the market puts forward the requirement to improve the operating noise of range hoods in order to reduce the sound power value and improve the sound quality. However, the current design of the range hood check valve Most of them only consider the prevention of flue gas backflow and the degree of sealing during the process of extracting fumes, and have not paid much attention to additional functions such as noise reduction and sound quality improvement, especially for the spiral suction range hoods currently on the market. When the flue gas reaches the connection between the centrifugal fan and the check valve, due to the change of the flow area, the flue gas will flow in a large vortex state, and the large vortex has high energy and is not easy to dissipate in the flow. As a result, it is easy to cause the range hood to produce loud noises, and even flutter and other undesirable phenomena, which reduces the market competitiveness of the product

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