Lampblack buffering mechanism for range hood

Abstract

The invention relates to a lampblack buffering mechanism for a range hood. The lampblack buffering mechanism for the range hood comprises a non-return valve and a lampblack buffering device, wherein avalve body of the non-return valve is provided with a lampblack exhaust channel, the lampblack exhaust channel is provided with an air inlet and an air outlet, and a valve plate of the non-return valve is arranged on the lampblack exhaust channel and can rotate relative to the valve body to open or block the lampblack exhaust channel; the lampblack buffering device is arranged between the air outlet and the air inlet of the valve body and is provided with a main lampblack channel, the main lampblack channel is longitudinally provided with a lampblack inlet and a lampblack outlet which communicate with each other, the lampblack inlet is in fluid communication with the air outlet, and the lampblack outlet is in fluid communication with the air inlet; and the partial side wall of the main lampblack channel is at least provided with a main body structure which expands outwards in the transverse direction so as to increase the volume of the main lampblack channel. When the lampblack flowsbackwards through gaps of the non-return valve and the main body structure receives the pressure in the main lampblack channel, the volume is increased to slow down the lampblack pressure in the mainlampblack channel, the lampblack flowing backwards is temporarily stored, and the situation that the lampblack flowing backwards enters a room through the range hood is delayed to a certain extent.

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 devices 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 valve p...

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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