Ventilation and exhaust backflow-preventive cap

An anti-backflow and hood technology, which is applied to vertical pipes, building components, buildings, etc., can solve problems such as backflow, achieve high air exhaust capacity, reduce backflow phenomena, and improve air exhaust capabilities

Active Publication Date: 2014-04-09
北京金盾华通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such an anti-backflow hood can still cause backflow in some cases

Method used

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  • Ventilation and exhaust backflow-preventive cap
  • Ventilation and exhaust backflow-preventive cap
  • Ventilation and exhaust backflow-preventive cap

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0033] Some embodiments of the present invention will be further introduced below in conjunction with the accompanying drawings, but it is not intended to limit the protection scope of the present invention.

[0034] refer to Figure 1 to Figure 3 According to an embodiment of the present invention, the anti-backflow hood includes: a main exhaust pipe 4 and four branch exhaust pipes 1, wherein the four branch exhaust pipes 1 are evenly distributed around the main exhaust pipe. The main exhaust duct 4 has a top cover 8 and an opening 2 is arranged on the upper part of the main exhaust duct 4 . The branch exhaust pipe 1 is connected to the main exhaust pipe 4 at the opening 2 and is in fluid communication. The branch exhaust duct 1 intersects with the main exhaust duct 4 at the opening 2 to form a first section, the upper part of the first section is the opening 2, and the lower part is the side wall 3 of the main exhaust duct.

[0035] see Figure 4, the wind discharged from...

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PUM

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Abstract

The invention relates to a backflow-preventive cap which comprises a main exhaust pipe and branch exhaust pipes. The main exhaust pipe is provided with a top cover, the branch exhaust pipes are connected with upper openings of the main exhaust pipe, are communicated with the main exhaust pipe via liquid and downwardly and obliquely extend along the radial direction of the main exhaust pipe, and the side walls of the main exhaust pipe upwardly extend at the openings to stretch into the branch exhaust pipes. The backflow-preventive cap with the structure has the advantages of simple and compact structure, easiness in machining, high exhaust capacity and excellent backflow-preventive performance.

Description

technical field [0001] The invention relates to an anti-backflow hood for ventilation and exhaust, in particular to an anti-backflow hood for ventilation and exhaust of residential or commercial buildings. Background technique [0002] Buildings that are used as residential or commercial buildings are usually equipped with wind caps at the top air outlets of the ventilation and exhaust passages. The previous wind caps are generally composed of elbows or small conical caps on the top of the exhaust pipe. The shortcoming of such hood is that it is greatly affected by wind force and wind direction, and often there will be unsmooth sewage discharge or backflow phenomenon when the wind force is high. Moreover, rainwater often enters the exhaust pipe when it rains. [0003] Chinese patent application CN101962993A discloses an anti-backflow hood, which includes a main exhaust duct and four branch exhaust ducts protruding outwards uniformly arranged on the top of the exhaust duct. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04F17/04E04F17/02
Inventor 张金昌
Owner 北京金盾华通科技有限公司
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