Range hood with rectifying function

Abstract

The invention discloses a range hood with a rectifying function. The range hood comprises a fume collecting hood, a flue and a fan, wherein the fume collecting hood comprises an inner layer and an outer layer; a gap is formed between the inner layer and the outer layer, and forms a flow guide air duct; the flow guide air duct is uniformly divided by flow guide baffles; a gap is formed between the bottoms of the inner and outer layers, and forms a vertically downward gas inlet; siphon holes are uniformly formed in the inner layer of the fume collecting hood; a flow guide cone is arranged between a gas outlet in the top of the fume collecting hood and the fan. According to the range hood, the inner layer of the fume collecting hood is designed to be an inner wall with the siphon holes, and the fan forms a low-air-pressure zone in the fume collecting hood through the siphon holes by a siphon principle, so that cooking fume uniformly floats to the fume collecting hood and the spread of the cooking fume is avoided; the gas inlet is formed in the bottom of the fume collecting hood, and a reverse air curtain is formed under the action of the suction force of the fan, so that the cooking fume is prevented from spreading outwards; the cooking fume is rectified into laminar flow gas before entering the fan under the combined action of the flow guide air duct, the siphon holes, the flow guide baffles and the flow guide cone, so that the fan is prevented from working under the turbulent flow gas condition and the exhaust efficiency of the fan is greatly improved.

Description

technical field [0001] The invention relates to a range hood, in particular to a range hood with rectification function. Background technique [0002] With the improvement of people's quality of life, the sanitation of the kitchen environment has received more and more attention, and range hoods are therefore widely used. The range hood is a kitchen appliance that purifies the kitchen environment. It is installed above the kitchen stove, and quickly removes harmful gases such as the waste burned by the stove and the oil fume produced during the cooking process, effectively protecting the health of the common people. [0003] In the prior art, the range hood is generally composed of a smoke collecting hood, an air inlet, a fan, an exhaust duct and a supporting shell. The fan, the airflow is in a state of disorder without effective rectification. According to the basic knowledge of fluid mechanics, fans, pumps, etc. work under laminar flow to achieve the highest efficiency....

AI Technical Summary

Problems solved by technology

This structure in the prior art will cause the following problems: 1. The turbulent smoke in the fume collecting hood is easy to escape out of the fume collecting hood, polluting the kitchen environment and endangering the health of the operator; 2. The efficiency of the fan working under turbulent flow It is not high enough to remove oily fume in time, and it is necessary to increase the power of the motor to increase energy consumption; 3. The noise of the fan working under turbulent flow is very loud

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