Range hood

Abstract

The invention discloses a range hood. The range hood comprises a smoke collecting cover, a machine box arranged above the smoke collecting cover and a fan arranged in the machine box, an air inlet isformed in the smoke collecting cover, a smoke guide plate is arranged below the air inlet, the fan is a three-dimensional fan, at least a part of the lower surface of the smoke guide plate is gradually inclined upwards from the middle to the edge so as to cooperate with the corresponding wall surface of the smoke collecting cover to define an acceleration flow channel with the cross section gradually reduced from bottom to top. The amount of oil smoke entering the range hood per unit time can be increased through the acceleration flow channel, so that the oil smoke suction effect is improved;and through the horizontal three-dimensional fan and a rotary filter screen arranged at an inlet of an air duct, the oil smoke can pass through the rotary filter screen at a relatively low flow rate before not being accelerated through the air duct, then the mutual contact time between the oil smoke and the rotary filter screen is relatively long so that the oil smoke can be fully collided with the rotary filter screen.

Description

technical field [0001] The invention relates to kitchen appliances, in particular to a range hood. Background technique [0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Generally, range hoods include top-suction and near-suction types. Top-suction range hoods use the principle of rising hot air to absorb and discharge the naturally rising oil fumes generated during cooking. It has more and more widespread applications. [0003] Existing range hoods are equipped with filter screens for the purpose of collecting cooking fumes, dust, and the like. For example, a range hood disclosed in a Chinese patent with application number 200780027956.9 has a hood with an air duct, an exhaust fan located in the air duct, a filter screen located in the air duct and in front of the exhaust fan, and the driving part is connected to On the filter screen, a flat rectifying plate is arranged near the suction port in the hood; another example is a...

AI Technical Summary

Problems solved by technology

Although this kind of smoker can realize direct suction and straight exhaust, similar to the above-mentioned vertical or inclined fan, the rotary filter can only be arranged at the air inlet of the centrifugal fan, and the motor of the centrifugal fan or a separate The motor is driven to rotate, which will not only cause a large wind resistance, but also the rotating filter screen will rectify the oil fume to a certain extent and then enter the centrifugal fan. The path is too short, and the effect of the rotating filter screen to make the air flow smooth cannot be reflected to the greatest extent.

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