Lampblack buffering mechanism for range hood

Abstract

The invention relates to a lampblack buffering mechanism for a range hood. The lampblack buffering mechanism comprises a check valve, a lampblack buffering device, a piston and a driving mechanism, the lampblack buffering device is arranged between an air outlet of the range hood and an air inlet of a valve body and is provided with a main lampblack channel, and the main lampblack channel is provided with a lampblack inlet and a lampblack outlet which communicate with each other in the longitudinal direction; the lampblack inlet is used for being in fluid communication with the air outlet of the range hood, and the lampblack outlet is used for being in fluid communication with the air inlet of the valve body; and the local side wall of the main lampblack channel transversely extends outwards to form an auxiliary cavity, the piston is arranged in the auxiliary cavity in a manner of sliding inside and outside along the transverse direction, the power input end of the driving mechanism isconnected with the outer wall of the piston, and the power output end of the driving mechanism is connected with a valve block. When the piston slides outwards in the transverse direction, the valveblock is driven by the driving mechanism to rotate, namely, the driving force for opening the check valve is increased, so that the check valve can be quickly opened when the range hood just starts towork even if the valve block is subjected to an oil accumulation bonding phenomenon.

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 , There is an openable and closable valve plate at the air outlet of the oil fume channel, 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, and the airtightness depends on the valve plate Gravity, bu...

AI Technical Summary

Problems solved by technology

[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 , There is an openable and closable valve plate at the air outlet of the oil fume channel, 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, and the airtightness depends on the valve plate Gravity, but after a long period of use, the valve plate is easily contaminated with oil fume, so that a gap is formed between the valve plate and the valve body, or the adhesion between the valve plate and the valve body occurs under the viscous action of oil accumulation (especially is when the range hood has not been used for a period of time);

[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; and 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 oil fume The smoke exhaust of the range hood is blocked, and at the same time, it is very easy to cause the backflow of oil fume, and the exhaust smoke of the range hood and the backflow of oil fume will form a vortex in the smoke pipe, which will increase the noise in the smoke pipe. At the same time, it will also make the valve easily produce Unstable swings affect the fume discharge during the peak period, increasing smoke exhaust resistance and noise;

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