Structure of pressure-varying air-exhausting duct
An exhaust duct, variable pressure technology, applied in vertical pipes, building components, building structures, etc., can solve problems such as airflow eddy current phenomenon, affect the effect of flue gas or other gas emission, and achieve the effect of eliminating disturbance and emission. Good, the effect of improving exhaust efficiency
Inactive Publication Date: 2004-03-17
北京正能远传节能技术研究院有限公司
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[0002] Chinese utility model patent CN 2180711Y discloses a pressure-variable exhaust channel, which is composed of a main pipe, a guide pipe and a pressure-transformer part arranged on its inner wall, and the exhaust channel of the guide pipe is connected with the air inlet on the main pipe Generally speaking, the position of the upper end plate of the above-mentioned transformer component is higher than the position of the gas outlet of the guide pipe, and the above-mentioned structure makes the smoke or gas flow from bottom to top flow between the guide tube and the transformer component. When there is a space between them, the flow speed is accelerated, which acts as a pressure changer, making the air outlet of the guide pipe negative or zero pressure. Due to the sudden widening of the exhaust duct above the outlet of the guide tube, the flow of air or other gases will generate a vortex phenomenon at the outlet of the guide tube, which will affect the discharge effect of smoke or other gases
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[0021] The present invention will be further described below in conjunction with the accompanying drawings.
[0022] In the schematic diagram shown in Figure 1 and the A-A cross-sectional view shown in Figure 2, the present invention consists of a gas discharge pipe 1, an exhaust guide pipe 2 arranged on its inner wall, and a gas flow transformation component 3. The exhaust guide pipe 2 is arranged on the gas The discharge pipe 1 is located on the inner wall opposite to the airflow pressure changing part 3 , and there is a gas circulation space between the airflow pressure changing part 3 . The exhaust channel of the exhaust guiding pipe 2 is connected with the air inlet 4 on the wall of the gas discharge pipe 1, wherein the position of the exhaust opening 5 of the exhaust guiding pipe 2 is higher than that on the top of the airflow pressure transformation part 3. location. When there is a gap between at least one of the two sides of the gas flow pressure changing component 3...
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A pressure-variable air exhausting duct for building is composed of air exhausting pipeline, exhaustion guide pipe and airflow pressure changing unit. The position of air outlet for exhausting guide pipe is higher than that of the top of said pressure changing unit. Its advantages are no eddy and high exhaust effect.
Description
technical field [0001] The invention relates to a common exhaust duct for buildings, in particular to a pressure-variable exhaust duct structure that prevents smoke and odor from passing between floors. Background technique [0002] Chinese utility model patent CN 2180711Y discloses a pressure-variable exhaust channel, which is composed of a main pipe, a guide pipe and a pressure-transformer part arranged on its inner wall, and the exhaust channel of the guide pipe is connected with the air inlet on the main pipe Generally speaking, the position of the upper end plate of the above-mentioned transformer component is higher than the position of the gas outlet of the guide pipe, and the above-mentioned structure makes the smoke or gas flow from bottom to top flow between the guide tube and the transformer component. When there is a space between them, the flow speed is accelerated, which acts as a pressure changer, making the air outlet of the guide pipe negative or zero pressu...
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IPC IPC(8): E04F17/02
Inventor 林润泉
Owner 北京正能远传节能技术研究院有限公司