Novel fan exhaust gas recirculation type turbocharging range hood

Abstract

The invention relates to a range hood. Brand new design is adopted for a mechanical structure, a working mode, a purification mode, a flue structure, a circulation mode and a control mode of an existing range hood. Efficiency, energy-saving performance and cleaning performance are higher. The range hood comprises a range hood body 1, a straight-through gas duct and a hemispherical and double-arc plasma electrostatic blade 7, a valve capable of being opened and closed, an indoor gas outlet 8 capable of being linked, a venturi principle gas inlet and gas outlet flue 9, an exhaust gas recirculation pipeline 11, an EGR control valve 12, a venturi tube type EGR system 13, an exhaust gas circulating system 14 with a machine turbochargning device and a turbocharging device, a flow guide vane 15 with an adjustable section, an exhaust pipe 16 allowing a hole in an exhaust tube for exhausting circulation of the range hood, a 4-2-1 exhaust tube 17, a single-turbine double-vortex tube 18 and a smoke machine shell cavity integrated type pipeline 19, wherein a centrifugal fan 2 is replaced with a movable vane adjustable axial flow fan and a mixed flow (oblique flow) booster fan; the fans can also be connected in parallel and connected in series, and the rotating speed can be adjusted; an impeller adopts three-element flow blade design 4; guide grooves 5 and a fan blade fairing 6 are arrangedon the impeller; and a sawtooth shape 10 is adopted at the tail edge of the contraction section of an exhaust port.

Description

Technical field: [0001] The invention relates to a kitchen appliance, in particular to a range hood. Background technique: [0002] Traditional range hoods use centrifugal fans. The way to separate oil fume is to use suction separation, vortex separation, and condensation separation. The centrifugal fan is based on the principle of converting kinetic energy into potential energy. The high-speed rotating impeller accelerates the gas, and then decelerates and changes the flow direction in the fan housing to convert kinetic energy into pressure energy. When the gas in the impeller is discharged, the pressure in the impeller is lower than the pressure in the air inlet pipe, and the new gas is sucked into the impeller under the action of the pressure difference and circulates continuously. Oil fume separation plate technology, the oil fume turns and collides at high speed under the action of countless eddies in the plate, the separated flue gas bypasses the separation plate and...

AI Technical Summary

Problems solved by technology

Install multiple sets of pipelines at the inlet, constriction, and tail sections of the pipeline, or simplify the airway opening method to 1 hole, 2 holes, or open 3 holes, or open more holes, but due to the The problem of short length, different pressure, and the problem of exhaust backflow still cannot be solved well

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