Shared flue capable of avoiding taints of odors

Abstract

The invention discloses a shared flue capable of avoiding taints of odors, and belongs to the technical field of architectural design. The shared flue capable of avoiding taints of odors mainly comprises an air duct separating wall and a shared flue body installed on one side of the air duct separating wall, wherein an exhaust pipe installation hole used for installing an exhaust pipe is reserved in the air duct separating wall, wall sealing materials are buried in the periphery of the exhaust pipe installation hole, the end, communicating with the shared flue body, of the exhaust pipe installation hole is provided with an elbow PVC (polyvinyl chloride) pipe, the port, connected with the elbow PVC pipe, of the exhaust pipe installation hole is provided with annular ring asphalt felt, the exhaust pipe is installed in the exhaust pipe installation hole, the annular ring asphalt felt is hollow, the center of the annular ring asphalt felt is zigzag, and the elbow end of the elbow PVC pipe is located in the shared flue body. The shared flue capable of avoiding taints of odors has the advantages that whether a range hood or an exhaust fan works or not, the shared flue can prevent flue gas in the shared flue from flowing back without external power; and because the elbow PVC pipe and the annular ring asphalt felt are adopted according to the design, the backflow resistance of gas is increased, and the degree of sealing of the periphery of the exhaust pipe is improved.

Description

technical field [0001] The invention relates to the technical field of architectural design, in particular to a public flue for preventing odor transfer. Background technique [0002] The current kitchen generally has three lines of defense to prevent oil fumes from pouring back: one is the flue check valve of the hood itself, which adopts a double-leaf spring press-in mechanism. Use the valve spring to press the leaves to block the ventilation channel and close it; the second is that the building adopts a pressure-changing type and a main-sub-type shared flue, and the flow of oily fume in the flue creates a certain load on the position where the hood is connected. Pressure, the air in the kitchen is sucked into the flue to prevent the oil fume from penetrating into the kitchen, also called the flue guide pipe device; third, most households often have to install a drooping flue fire check valve at the flue mouth. The reverse valve also adopts a one-way valve structure, whic...

AI Technical Summary

Problems solved by technology

[0002] The current kitchen generally has three lines of defense to prevent oil fumes from pouring back: one is the flue check valve of the hood itself, which adopts a double-leaf spring press-in mechanism. Use the valve spring to press the leaves to block the ventilation channel and close it; the second is that the building adopts a pressure-changing type and a main-sub-type shared flue, and the flow of oily fume in the flue creates a certain load on the position where the hood is connected. Pressure, the air in the kitchen is sucked into the flue to prevent the oil fume from penetrating into the kitchen, also called the flue guide pipe device; third, most households often have to install a drooping flue fire check valve at the flue mouth. The reverse valve also adopts a one-way valve structure, which is opened by wind force and closed by gravity; although there are three lines of defense to check, the backflow of oil fume will still happen from time to time, because the non-return valve of the air outlet flue of the hood and the smoke The drooping flue fire prevention check valve installed at the crossing adopts a structure that relies on the wind force of the hood to open, and the valve plate is closed by its own weight or with a booster spring. In order to ensure that the wind force of the hood can blow open the valve plate, its weight or spring force cannot If the valve is too large, the closing force of the valve is small and the closing is not tight. In addition, the valve plate is susceptible to oil dirt adhesion, and the opening and closing are not in place after the oil dirt adhesion. The result is a large amount of oil fume pouring back, which is a common phenomenon of oil fume pouring back

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