Flue

Abstract

The invention discloses a flue and belongs to the technical field of architectural design. The flue mainly comprises a flue partition and a public flue installed on one side of the flue partition; a vent pipe installing hole used for installing a vent pipe is reserved in the flue partition; wall sealing materials are buried on the periphery of the vent pipe installing hole; an elbow PVC pipe is installed at the end, communicating with the public flue, of the vent pipe installing hole; annular ring felt is installed on the joint of the vent pipe installing hole and the elbow PVC pipe; and the vent pipe is installed in the vent pipe installing hole. When the vent pipe penetrates through the annular ring felt, the annular ring felt seals the periphery, making contact with the elbow PVC pipe, of the vent pipe; and the inner diameter of the elbow PVC pipe is slightly larger than the diameter of the vent pipe installing hole. The flue has the advantages that the flue can prevent the smoke in the public flue from flowing back without the need for external power, and the design of the elbow PVC pipe and the annular ring felt improves the back flow resistance of the gas and the sealed degree of the periphery of the vent pipe.

Description

technical field [0001] The invention relates to the technical field of architectural design, in particular to a flue. 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, which is opened by wind force and closed...

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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