Volute structure for range hood with inclined side wall and circular arc inlet cone

Abstract

The invention provides a volute structure for a range hood with an inclined side wall and a circular arc inlet cone. The structure comprises a volute profile surface, a volute inclined side wall structure and the circular arc inlet cone. The volute inclined side wall structure is of a three-layer plate structure, a middle layer plate is of a solid plate structure, outer side plates and inner sideplates of the volute are inclined toward the outer side of the volute from the bottom to the up, micro-perforations are evenly formed in plates, a plurality of resonant cavities with different depthsare arranged between the three layers of the plates, and the cavities can be filled with sound absorbing materials to achieve the common sound absorption of the inner wall and the outer wall of the volute; the circular arc inlet cone is smoothly connected with the outer plates of the volute on both sides, a smooth cone without sharp angles smoothly guide flue gas from an air inlet at the bottom ofa shell to air inlets on both sides of the volute, and the adhesion of oil droplets in the lower portion of the volute is reduced; the cross section of an inlet flow passage between the shell and theinclined side wall structure of the range hood volute with the circular arc inlet cone is gradually reduced from the bottom to the up, the flue gas flow rate is gradually increased, a smooth gradientis formed, the flow resistance and the flow separation are smaller, and the aerodynamic and acoustic performance are better.

Description

technical field [0001] The invention belongs to the field of range hoods, and in particular relates to a volute structure for a range hood with an inclined side wall of an arc inlet cone. Background technique [0002] With the continuous development of China's economy, the Chinese home appliance market is also changing with each passing day. Range hoods, as a necessity for kitchen appliances, have been growing at a rate of about 15% in recent years. In 2013, the sales volume of range hoods in the Chinese market reached more than 12.3 million units. There are also nearly a hundred manufacturers of range hoods. Consumers have higher and higher requirements for the quality and performance of range hoods. Consumers always hope that range hoods can discharge more range hoods with higher pressure while satisfying low noise. People's demand for large suction and low noise range hood is fundamentally the consumer's demand for a clean and comfortable kitchen environment. [0003] Th...

AI Technical Summary

Problems solved by technology

[0004] (1) On the air intake channel formed by the square casing and the side wall of the volute with a wedge-shaped diversion splitter, the cross-section of the channel undergoes a process of gradually decreasing and then flowing at a constant cross-section, and the flow direction of the flue gas will be diverted There is a sudden change at the sharp corner where the wedge meets the side wall of the volute, the flow is separated and a large number of vortices are generated, the flow loss is large, and the fan efficiency is low

[0005] (2) The noise of the range hood is mainly generated by the rotating impeller inside the volute. The flow path from the air inlet of the volute to the air inlet of the casing is the main way for the noise inside the volute to spread outward. The lack of effective noise reduction measures on the path makes a large amount of noise generated by the rotating impeller transmitted to the outside of the range hood, affecting the physical and mental health of residents

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