Anti-backflow assembled hood

Abstract

The utility model discloses an anti-backflow assembled hood, which is characterized in that a base is fixed at the top of a building, and a main cylinder is communicated with the interior of the building, so that air intercommunication between the interior and the exterior of the building is realized through the main cylinder. A plurality of air inducing plates are mutually connected to form an air inducing coaming, a windproof side face and a waterproof side face are built, the air inducing coaming is connected with the main cylinder through a second assembly and is fixedly suspended above the outer portion of the main cylinder, and air in the building penetrates through the main cylinder and circulates in the space formed between the main cylinder and the air inducing coaming. Meanwhile, the top cover is erected on the top face of the air inducing coaming through the first assembly on the inner side wall of the air inducing coaming, in rainy days, air in a building can circulate in the space formed between the top cover and the air inducing coaming, the top cover is used for preventing rainwater from flowing backwards from the top face of the integrally-formed main barrel, and the problems that equipment is prone to being subjected to air flowing, air pressure is unstable, and the equipment is not stable are solved. And rainwater is driven to fall into the device from the fault, so that the anti-backflow effect is poor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hood technical field, concretely relates to a prevent backflow assembly hood. BACKGROUND

[0002] The prevent backflow hood is a kind of accessory specially designed for ventilation system, is installed at the outlet of the exhaust duct of building.It utilizes the unique blade or valve design, effectively prevents the outside cold air, rainwater or pollutants from flowing into the room under the condition of not affecting normal exhaust, maintains indoor air quality, and is suitable for various ventilation needs of residential, commercial and industrial buildings.

[0003] At present, as the publication number CN209817353U, a combined prevent backflow hood is disclosed, the device adopts three prevent backflow components a, b, c, three prevent backflow components a, b, c are arranged from top to bottom in turn, prevent backflow components b, c are fixed in the inner wall of wind shield shell through intermediate plate, and are used for preventing rainwater backflow.However, since multiple prevent backflow components are arranged, fault occurs between prevent backflow components, in actual use, since rainwater a layer drops, air flow causes unstable air pressure, rainwater is easily driven to fall into the interior of the device from fault between prevent backflow components, so that the prevent backflow effect of the device is poor. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a prevent backflow assembly hood to solve the problems described in the background art.

[0005] The technical scheme of the utility model is realized as follows:

[0006] A prevent backflow assembly hood, comprising: a base, a main cylinder, a top cover and multiple wind guide plates, wherein two adjacent edges of the multiple wind guide plates are connected to each other to form a wind guide fence.

[0007] The base top surface is connected with the main cylinder, the top cover is arranged above the main cylinder, the top cover is connected with the upper part of the inner side wall of the wind guide fence through a first connecting assembly, and the wind guide fence is arranged outside the main cylinder, and the inner side wall thereof is connected with the outer side wall of the main cylinder through a second connecting assembly.

[0008] Further technical scheme is that the middle part of the top cover is upwardly convex, the top point and four edges form a four-pyramid shape, the top edge of the top cover is lower than the top surface of the wind guide fence, and the inner side wall of the wind guide fence and the bottom edge of the top cover are not in contact with each other and need to be connected through the first connecting assembly.

[0009] Further technical scheme is that the first connecting assembly comprises multiple first supporting rods, the two ends are connected with the inner side walls of the two wind guide plates respectively, and the bottom edge of the top cover is arranged on the top surface of the first supporting rod.

[0010] Further technical solutions are that one end of the first support rod is fixedly connected with two of the air guide plates at an angle, and the other end is fixedly connected with the bottom surface of the top cover.

[0011] Further technical solutions are that the bottom of the main cylinder is integrally connected with the top surface of the base, and the base is provided with a plurality of through holes for detachable fixing to a wall body by rivets.

[0012] Further technical solutions are that the main cylinder gradually decreases in caliber from the bottom to the top, and the cross section formed by the main cylinder and the air guide plate is inclined.

[0013] Further technical solutions are that the second connecting assembly includes a plurality of second support rods, one end of the second support rod is connected with the inner side wall of the air guide enclosure, and the other end of the second support rod is connected with the main cylinder.

[0014] Further technical solutions are that a detachable filter screen is arranged between the main cylinder and the inner side wall of the air guide enclosure.

[0015] Further technical solutions are that the bottom surface of the top cover covers the top surface of the main cylinder.

[0016] Further technical solutions are that a plurality of the air guide plates are integrally connected to form the air guide enclosure.

[0017] The beneficial effects of the present application are as follows:

[0018] The base is fixed on the top of the building, and the main cylinder is connected with the interior of the building, so that the interior of the building and the outside are communicated through the main cylinder. The plurality of air guide plates are connected with each other to form an air guide enclosure, and a windproof and waterproof side is built. The air guide enclosure is connected with the main cylinder by the second assembly and is fixedly suspended above the outside of the main cylinder. The air in the building passes through the main cylinder and flows through the space formed between the main cylinder and the air guide enclosure. At the same time, the inner side wall of the air guide enclosure is connected with the top cover through the first assembly. When it rains, the air in the building can flow through the space formed between the top cover and the air guide enclosure, and the top cover is used to prevent rainwater from flowing from the integrally formed top surface of the main cylinder, thereby solving the technical problem that the equipment is easily fallen into the device inside from the fault between the rainwater, resulting in poor anti-inversion effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a general first state schematic view of the present application;

[0020] Figure 2 It is a general second state schematic view of the present application;

[0021] Figure 3 It is a top view schematic view of the present application;

[0022] Figure 4 As Figure 3 A-A cross-sectional view is shown in the middle.

[0023] Figure 5 A top view of another embodiment of the present application is shown.

[0024] In the figure, 1, base; 2, main cylinder; 3, top cover; 4, air guide plate; 5, first support rod; 6, through hole; 7, second support rod; 8, filter screen. DETAILED DESCRIPTION

[0025] In order to better understand the technical content of the present application, specific embodiments are provided below, and the present application is further described in conjunction with the drawings.

[0026] Embodiment one

[0027] Referring to Figures 1 to 4 The present application provides a kind of anti-inversion assembly hood, including: base 1, main cylinder 2, top cover 3 and multiple air guide plates 4, wherein, multiple air guide plates 4 between two adjacent edges are connected to form air guide fence;Base 1 top surface is connected with main cylinder 2, and main cylinder 2 is provided with top cover 3, and top cover 3 is connected between the inner side wall upper portion of air guide fence by first connecting assembly, and air guide fence cover is arranged outside main cylinder 2, and its inner side wall is connected with the outer side wall of main cylinder 2 by second connecting assembly.

[0028] It should be noted that in the existing equipment, most of them are integrally welded once forming, which causes the installation body to be heavy and occupy a large space, thereby increasing transportation cost. Therefore, the present application adopts separate transportation, and the air guide fence, base 1 and main cylinder 2 (integrated), top cover 3 are disassembled, and then connected by the first connecting assembly and the second connecting assembly after reaching the designated location, so as to avoid occupying space during transportation and reduce transportation cost. The air guide fence is formed by interconnecting the side edges of four air guide plates 4.

[0029] Specifically, the base 1 is fixed on the top of the building, and the main cylinder 2 is connected with the inside of the building, so that the inside and outside of the building can communicate through the main cylinder 2. The air guide fence is formed by interconnecting the multiple air guide plates 4, and the air guide fence is connected with the main cylinder 2 by the second assembly and is fixed in the air above the outside of the main cylinder 2. The air in the building passes through the main cylinder 2 and flows through the space formed between the main cylinder 2 and the air guide fence. At the same time, the inner side wall of the air guide fence is connected with the top cover 3 by the first assembly, and when it rains, the air in the building can flow through the space formed between the top cover 3 and the air guide fence, and the top cover 3 is used to prevent rainwater from flowing from the top surface of the integrally formed main cylinder 2, thereby solving the technical problem that the equipment is easily affected by air flow, causing unstable air pressure, and rainwater falls from the fault between the device inside, resulting in poor anti-inversion effect.

[0030] In this embodiment, the top cover 3 protrudes upward in the middle, and its apex and four sides form a four-sided pyramid shape. The top edge of the top cover 3 is lower than the top surface of the air intake enclosure. The inner side wall of the air intake enclosure and the bottom edge of the top cover 3 do not contact each other and need to be connected by the first connecting component.

[0031] The top cover 3, with its pyramidal shape, allows for rapid water drainage. When rainwater falls onto the top surface of the top cover 3, it flows downwards from the top to the bottom due to gravity. This accelerates the flow of rainwater due to the pyramidal shape, enhancing the drainage capacity of the top cover 3.

[0032] Preferably, the first connecting assembly includes multiple first support rods 5, with both ends connected to the inner sidewalls of the two air intake plates 4 respectively, and the bottom edge of the top cover 3 is mounted on the top surface of the first support rods 5.

[0033] The first support rod 5 is fixed to the inner wall of the two air-guiding plates 4 by welding or riveting, and the top cover 3 is fixed to the top surface of the first support rod 5 by welding or riveting. The first support rod 5 is cuboid in shape, and a first support rod 5 is connected to the inner wall of each of the two air-guiding plates 4 to fix the four corners of the top cover 3, so as to facilitate the stable drainage of the top cover 3 and ensure that the top cover 3 cannot be blown over by strong winds.

[0034] In this embodiment, the bottom of the main cylinder 2 is integrally connected to the top surface of the base 1. The base 1 is provided with multiple through holes 6, which are used to fix the main cylinder 2 to the wall by means of rivets.

[0035] The bottom of the main cylinder 2 and the top surface of the base 1 are integrally formed to improve the sealing performance and prevent rainwater from seeping from the outer wall of the main cylinder 2 into the roof of the building through the base 1.

[0036] Preferably, the diameter of the main cylinder 2 gradually decreases from its bottom to its top, and the cross-section formed with the air duct 4 is inclined.

[0037] The cross-sectional area formed by the main tube 2 and the air intake plate 4 gradually decreases, which makes the air circulation rate between the main tube 2 and the building interior higher, thereby improving the ventilation effect inside the building.

[0038] In this embodiment, the second connecting assembly includes multiple second support rods 7. The inner wall of the air intake panel is connected to one end of the second support rod 7, and the other end of the second support rod 7 is connected to the main cylinder 2. A filter screen 8 is provided between the main cylinder 2 and the inner wall of the air intake panel and is connected to the second support rod 7 by rivets.

[0039] The second support rod 7 is rectangular in shape and is used to stably connect the main cylinder 2 and the air-expelling enclosure. A filter screen 8 is installed between the main cylinder 2 and the air-expelling enclosure to reinforce the support of the main cylinder 2 and the air-expelling enclosure, while also allowing airflow.

[0040] In this embodiment, the bottom surface of the top cover 3 covers the top surface of the main cylinder 2.

[0041] The area of the top cover 3 is set to be larger than the top surface outlet of the main cylinder 2, so that when rain falls, it cannot fall into the main cylinder 2 under the shelter of the air guide enclosure and the top cover 3, and the reverse flow phenomenon is avoided.

[0042] In the present embodiment, the plurality of air guide plates 4 are integrally connected to form the air guide enclosure.

[0043] The air guide plates 4 are used for air flow between the inside and outside of the building, and improve the ventilation effect. At the same time, the four air guide plates 4 are integrally formed, which improves the air tightness between the air guide plates 4, avoids rainwater from seeping into the gap between the air guide plates 4, corrodes the connection of the air guide plates 4, and reduces the service life.

[0044] Embodiment two

[0045] Reference Figure 4 In another preferred embodiment, one end of the first support rod 5 is fixed between the two air guide plates 4 at an included angle, and the other end is fixed to the bottom surface of the top cover 3.

[0046] In addition, the two ends of the first support rod 5 can be fixed to the two air guide plates 4 at an included angle and the surface of the top cover 3 respectively, so as to reduce the area of the first support rod 5 and the air guide enclosure, and improve the ventilation area. At the same time, the connection mode can be welding.

[0047] The above only describes the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A reverse flow preventing assembly hood, characterized in that, The utility model relates to a kind of air induction device, including: Base (1), main cylinder (2), top cover (3) and multiple air induction plates (4), wherein, multiple air induction plates (4) are connected with each other to form air induction fence between two adjacent edges of the air induction plates (4); The top surface of the base (1) is connected with the main cylinder (2), and the top cover (3) is arranged above the main cylinder (2). The top cover (3) is connected with the upper part of the inner side wall of the air induction fence through a first connecting assembly. The air induction fence is arranged outside the main cylinder (2), and the inner side wall of the air induction fence is connected with the outer side wall of the main cylinder (2) through a second connecting assembly. The second connecting assembly includes multiple second support rods (7). One end of the second support rod (7) is connected with the inner side wall of the air induction fence, and the other end of the second support rod (7) is connected with the main cylinder (2). A detachable filter screen (8) is arranged between the main cylinder (2) and the inner side wall of the air induction fence.

2. A backdraft-preventing assembly hood according to claim 1, characterized in that The middle part of the top cover (3) is upwardly protruding, and the top point of the top cover (3) forms a four-pyramid shape with the four edges. The top edge of the top cover (3) is lower than the top surface of the air induction fence. The inner side wall of the air induction fence and the bottom edge of the top cover (3) are not in contact with each other, and are connected through the first connecting assembly.

3. A backdraft-preventing assembly hood according to claim 2, characterized in that The first connecting assembly includes multiple first support rods (5). Both ends of the first support rod (5) are connected with the inner side walls of two air induction plates (4), respectively. The bottom edge of the top cover (3) is arranged on the top surface of the first support rod (5).

4. A backdraft-preventing assembly hood according to claim 3, characterized in that One end of the first support rod (5) is fixedly connected with two air induction plates (4) at an angle, and the other end is fixedly connected with the bottom surface of the top cover (3).

5. The anti-backdraft assembly hood of claim 1, wherein, The bottom part of the main cylinder (2) is integrally connected with the top surface of the base (1). The base (1) is provided with multiple through holes (6). The through holes (6) are used for detachable fixation on a wall body through rivets.

6. The anti-backdraft assembly hood according to claim 1 or 5, wherein, The caliber of the main cylinder (2) gradually decreases from the bottom part to the top part. The cross section formed by the main cylinder (2) and the air induction plate (4) is inclined.

7. The backdraft-preventing assembly hood according to claim 1, wherein The bottom surface of the top cover (3) covers the top surface of the main cylinder (2).

8. The backdraft-preventing assembly hood according to claim 1, wherein Multiple air induction plates (4) are integrally connected to form the air induction fence.

Images