Oil fume buffer mechanism for range hood

Abstract

The invention relates to an oil fume buffer mechanism for a range hood, which includes a check valve and an oil fume buffer device. The valve body of the check valve has a smoke exhaust channel, and the smoke exhaust channel has an air inlet and an air outlet. The valve plate is set on the smoke exhaust channel, and can be rotated relative to the valve body to open or block the smoke exhaust channel; the oil fume buffer device is arranged between the air outlet and the air inlet of the valve body, which has a main oil smoke channel, and the main oil smoke channel There are connected smoke inlet and smoke outlet in the longitudinal direction, the smoke inlet is in fluid communication with the air outlet, and the smoke exhaust is in fluid communication with the air inlet; the partial side wall of the main oil fume channel has at least one laterally outward expansion The main structure that increases the volume of the main oil fume passage. When the oil fume is poured back through the gap of the check valve, when the main structure is subjected to the pressure in the main oil fume channel, the volume increases to slow down the pressure of the oil fume in the main oil fume channel, and temporarily stores the oil fume, which delays the oil fume from flowing back through the range hood to a certain extent Go indoors.

Description

technical field [0001] The invention relates to the technical field of range hoods, in particular to an oil fume buffer mechanism for range hoods. Background technique [0002] At present, the exhaust fume outlets of the kitchens of the residents of the building are connected to a fume exhaust channel that runs through the upper and lower sides. In order to prevent the oil fume in the flue gas duct from flowing back into the kitchen, an exhaust pipe is installed between the exhaust pipe of the range hood and the public flue. There are devices like flue check valves. [0003] The existing flue check valve generally includes an oil fume channel formed by a casing, the oil fume channel has an opposite air inlet and an air outlet, the air inlet is connected to the air outlet of the range hood, and the air outlet extends into the common flue gas duct. , There is a valve plate that can be opened and closed at the air outlet of the fume channel. The check valve is a one-way valve,...

AI Technical Summary

Problems solved by technology

[0004] Once there is a gap between the valve plate and the valve body, when the pressure in the public flue is high and the floor of the user is high, the oil fume in the public flue will enter the smoke pipe of the indoor range hood through the gap, forming a non-working state of the hood. The oil fume is poured backwards, producing kitchen oil fume and peculiar smell; at the same time, when the range hood is in normal working condition, the oil fume resistance in the public flue will be relatively large, that is, when the pressure of the oil fume in the public flue is greater than the pressure in the smoke pipe, at this time, the range hood The smoke exhaust is blocked, and at the same time, it is very easy to cause the oil fume to flow backward, and the situation of the smoke exhaust is more serious during the use of the range hood during the peak period. In addition, the smoke exhausted by the range hood and the oil fume poured back form a vortex in the smoke pipe. As a result, the noise in the smoke pipe increases, and at the same time, the valve plate is prone to unstable swing, which affects the exhaust of oil fume during the peak period, and increases the smoke exhaust resistance and noise.

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