Low noise and heat negative pressure flue gas exhaust method of kitchen ventilator

Abstract

The invention discloses a low-noise thermal negative pressure flue gas exhaust method for a range hood. The range hood includes a hood, an exhaust pipe, a smoke exhaust pipe and an elbow pipe. The elbow is connected between the exhaust pipe and the smoke exhaust pipe. The method of exhausting the smoke is that the exhaust pipe is hyperbolic, and the flow velocity of the smoke is increased from the structure of the exhaust pipe, and then heated by resistance. The method is to heat the flue gas in the exhaust duct to increase the negative pressure of the flue gas in the exhaust duct, and form a thermal negative pressure of the flue gas in the exhaust duct. A larger thermal negative pressure is formed in the flue pipe to draw the hot oil fume in the exhaust pipe to expedite discharge into the flue. The flue gas exhaust method of the present invention, the flue gas does not pass through the fan leaf of the hot air pressure fan, the noise is low, the resistance and the hot fan are heated in two stages, the exhaust pipe, the elbow pipe and the smoke exhaust pipe are all in the state of hot air flowing through, and the flue gas It is not easy to adhere to the inner wall of the air duct, which is convenient for the maintenance and cleaning of the range hood.

Description

technical field [0001] The invention relates to the technical field of kitchen appliances, in particular to a method for exhausting smoke from range hoods with low noise and thermal negative pressure. Background technique [0002] At present, the range hood has become one of the indispensable kitchen and bathroom product members in the urban family kitchen of our country. The range hood is a household appliance that uses artificially formed miniature "artificial wind" to drive away smoke. That is to say, it adopts the principle of "air negative pressure" and installs an electric impeller in a metal body. When the impeller rotates at a high speed, it will A negative pressure area is formed around the air inlet of the range hood to guide the smoke into the range hood, and the smoke will be continuously "sucked" into the range hood. [0003] When the range hood is working, the "flue gas" sucked is mainly composed of air, water vapor, flue gas, fuel waste gas, etc., which is a ...

AI Technical Summary

Problems solved by technology

In the volute, the temperature of the "flue gas" molecular clusters in the range hood rises due to the collision with the impeller and the collision between the molecular clusters, so the viscosity of the mixed gas increases, which increases the resistance of the gas flow, and there will be considerable A large number of oil droplets adhere and condense on the surface of the volute, impeller, and motor of the range hood, which exacerbates the unfavorable turbulent flow phenomenon of the range hood. The performance of related components is damaged, and the effect of smoking gas is greatly reduced. These situations will bring three major problems to traditional range hoods:

[0004] 1. The attachment of oil droplets will increase the running resistance of the range hood, and the effect of smoking gas will be greatly reduced. If unprofessional or untimely cleaning and unprofessional assembly are added, the smoke exhaust effect of the range hood will be reduced

[0005] 2. Oil droplets adhere and the resistance of gas flow increases, which will significantly increase the operating noise of the exhaust fan, making the kitchen staff suffer from noise pollution during busy cooking

[0006] 3. The range hood vibrates too much and is prone to oil leakage

[0019] As far as my country's actual situation is concerned, my country's kitchen range hood purification technology has not made substantial progress, and the flue gas purification efficiency and body resistance have not met the standard requirements. From the perspective of environmental protection, there are still many problems in the design of range hoods. Various kitchen flue gas methods based on static technology still need to be improved

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