Fan system and extractor hood and control method thereof

Abstract

The invention discloses a fan system. The fan system comprises a shell, an impeller arranged in the shell and a first motor used for driving the impeller to rotate. The first motor comprises a motor body and a first output shaft connected with the impeller. The fan system further comprises a second motor fixed with the shell. The second motor is located on the side, away from the impeller, of thefirst motor and is provided with a second output shaft, and the second output shaft is rotationally connected with the motor body of the first motor. The invention further discloses an extractor hoodof the fan system and a control method of the extractor hood. Compared with the prior art, the fan system, the extractor hood and the control method of the extractor hood have the advantages that through the arrangement of the second motor connected with the first motor used for driving the impeller to rotate, the impeller can rotate around the axis of the impeller and can also rotate around the joint of the impeller and the second motor, air flow sucked by an air flue crosses in a sector shape, a negative pressure area is promoted to obviously expanded outwards in a sector shape, the effect of absorbing cooking fumes is improved, and the problem of cooking fume moving is solved.

Description

technical field [0001] The invention relates to a power system, in particular to a fan system, a range hood applied with the fan system, and a control method for the range hood. Background technique [0002] Range hoods have become one of the indispensable kitchen appliances in modern families. The range hood uses the principle of fluid dynamics to work, sucks and exhausts the range hood through a centrifugal fan installed inside the range hood, and uses a filter to filter some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute and a motor that drives the impeller to rotate. When the impeller rotates, a negative pressure suction is generated in the center of the fan, and the oil fume under the range hood is sucked into the fan, and after being accelerated by the fan, it is collected by the volute and guided out of the room. [0003] The operating environment of the range hood is complicated. During use, it will be affected by vario...

AI Technical Summary

Problems solved by technology

[0006] However, the way this fan swings is simply to adjust the front and rear positions of the volute to achieve enhanced oil absorption fume effect. The actual front and rear distance space limits the volute stroke, and the adjustable stroke is very limited, and it can only move forward and backward. The change of pressure area is very small. When the volute moves forward, the upper negative pressure area becomes larger, and at the same time, the lower negative pressure area becomes smaller

That is to say, simply changing the position of the negative pressure zone does not significantly increase the negative pressure zone, so it cannot play the role of increasing the negative pressure zone.

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