Oil fume buffer mechanism for range hood

Abstract

The invention relates to a fume buffering mechanism for a range hood, which includes a first check valve and a fume buffering device. The fume buffering device includes an auxiliary fume passage, a second check valve and a pressure-sensitive actuator. A third valve plate for opening or closing the second smoke inlet and a drive mechanism for driving the third valve plate to move relative to the second smoke inlet are provided, and the power input end of the drive mechanism is connected to the pressure-sensitive actuator. The power output end of the driving mechanism is connected with the third valve plate. The advantage of the present invention is that: when the exhaust of the main oil fume channel is blocked, the oil fume will enter the auxiliary oil fume channel and be temporarily stored in the auxiliary oil fume channel. When the pressure of the oil fume in the auxiliary oil fume channel accumulates to a certain Open to discharge the fume into the public flue, so even if the smoke exhaust in the main fume passage is blocked, the fume can be discharged through the auxiliary fume passage.

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 oil fume exhaust outlets of the kitchens of the building residents are all connected to a smoke exhaust channel that runs through the upper and lower sides. There are mechanisms like flue check valves. [0003] Existing flue check valves generally include an oil fume passage formed by a casing, the oil fume passage has opposite air inlets and air outlets, the air inlet is connected to the outlet pipe of the range hood, and the air outlet extends into the public flue gas passage , a valve plate that can be opened and closed is provided at the air outlet of the oil fume passage, and the check valve is a one-way valve, and the normal opening of the valve plate of the existing check valve depends on the airflow pressure blown out by the hood. [0004] Once there is a gap between the valv...

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, resulting in 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 backflow of oil fume. In the process of using the range hood in the peak period, the obstruction of smoke exhaust is more serious, and the smoke exhausted by the range hood and the oil fume poured back form a vortex in the smoke pipe, thus The noise in the smoke pipe will increase, and at the same time, it will also make the valve plate prone to unstable swing, which will affect the oil fume discharge during the peak period, and increase the smoke exhaust resistance and noise.

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