Fire-resisting damper for flue

Abstract

The invention relates to a fire-resisting damper for a flue. The fire-resisting damper comprises a flue gas channel formed by a shell, an air inlet is formed in one end of the flue gas channel, the other end is an air outlet end provided with an end face, two air outlets are formed in the end face, two rotatable blades corresponding to the air outlets and only opened in the air outlet direction are arranged on the outer side of the end face, a flow guide cover is arranged outside the end face, and a flue gas flow guide channel with the upper portion and the lower portion opened is formed between the end face and the flow guide cover; the flow guide cover is arranged outside the end face, and the flue gas flow guide channel with the upper portion and the lower portion opened is formed between the end face and the flow guide cover, so that flue gas is blown to the flow guide cover after being blown from the air outlets and then moves upwards along the flue gas flow guide channel, the flowing speed of flue gas in common longitudinal flue gas is not affected, and the fire-resisting damper is beneficial for upward flow of the flue gas and good in flue gas exhaust effect.

Description

technical field [0001] The invention relates to the field of fire dampers for flue, in particular to a fire damper for flue. Background technique [0002] In kitchens using longitudinal public flue ducts, in order to prevent oily fumes from flowing back into the kitchen, a device such as a flue fire damper is generally installed between the outlet pipe of the range hood and the public flue duct. , the national standard GB50096-2011 and JGJ / T309-2013 have stipulated the exhaust check of the residential flue gas pipeline, but the existing check valves on the market are difficult to meet this standard. [0003] Existing flue fire dampers generally include a flue gas passage formed by a casing, the flue gas 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 smoke. In the air duct, openable and closable blades are arranged at the air outlet of the flue gas passage, and one o...

AI Technical Summary

Problems solved by technology

When the range hood is not in use, the blades are in the closed position due to their own gravity and cover the air outlet; when the range hood is in use, the blades are in the open position, and the blades are far away from the air outlet, and the smoke is discharged into the flue through the air outlet. The gas is blown out horizontally, and then flows upwards to discharge the longitudinal common flue gas passage. Since the flue gas is blown out horizontally, in the process of blowing out, it will affect the flow velocity of the upward flowing flue gas, thereby affecting the flow of the flue gas in the longitudinal public flue gas passage. discharge

Since many users share a vertical public flue gas passage, once a fire breaks out in one household, a large amount of high-temperature harmful gas will flow into the vertical public flue gas passage. Harmful gas will enter the home of the user who is using the range hood through the flue gas channel of the flue fire damper, thereby threatening the life safety of the residents. The blades of the existing fire damper are closed by their own gravity. Not in time, poor sealing

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