Louver type hood device

Abstract

The utility model relates to a shutter type hood device. Comprising an air cap base, a plurality of supporting vertical plates are installed on the air cap base, a shutter assembly is installed between main bodies of the adjacent supporting vertical plates, a rainproof top plate is installed between the tops of the adjacent supporting vertical plates, a supporting frame is installed between the supporting vertical plates, a rainproof cone is installed above the supporting frame, and a flow guide cone is installed below the supporting frame. The shutter assembly comprises a plurality of arc-shaped shutter plates, the ends of the arc-shaped shutter plates are fixedly connected with the supporting vertical plates, and airflow channels inclining upwards from outside to inside are formed between the adjacent arc-shaped shutter plates. The shutter type hood device has the basic functions of wind prevention and rain prevention, meanwhile has the better capabilities of wind prevention, rain prevention and smoke backflow prevention, has the function of pulling out smoke, and improves the smoke exhaust effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of exhaust devices, and in particular relates to a shutter-type hood device. Background Art

[0002] A hood device is usually installed on the top of the exhaust duct of a building. The hood device is mainly used to provide wind and rain protection functions, prevent the external natural wind from adversely affecting the exhaust of smoke and prevent rainwater from entering the exhaust duct, so as to achieve a better exhaust effect. The louver hood is an important type of hood device. A louver structure is provided on the main structure of the hood device, and exhaust is discharged through the louver structure. The louver structure plays a wind and rain protection function to a certain extent.

[0003] The existing hood device has problems such as poor smoke exhaust due to wind backflow and rainproof structure hindering direct smoke exhaust due to unreasonable structural design. Therefore, it is necessary to optimize the structure of the hood device to solve the above-mentioned technical problems and enhance the hood device's ability to prevent wind, rain and smoke backflow. Utility Model Content

[0004] The utility model aims to provide a louver-type hood device, which improves the windproof, rainproof and smoke backflow-proof capabilities of the hood device, and has the function of extracting smoke, thereby improving the effect of smoke exhaust.

[0005] The technical solution adopted by the utility model is: a louver-type hood device, including a hood base, a plurality of supporting uprights installed on the hood base, a louver assembly installed between the main bodies of adjacent supporting uprights, a rainproof top plate installed between the tops, a supporting frame installed between the supporting uprights, a rainproof cone installed above the supporting frame, and a guide cone installed below the supporting frame; the louver assembly includes a plurality of arc-shaped blades, the ends of the arc-shaped blades are fixedly connected to the supporting uprights, and an airflow channel inclined upward from the outside to the inside is formed between adjacent arc-shaped blades.

[0006] Preferably, each arc-shaped blade of the louver assembly is in an arc shape, and a straight blade is provided on the inner edge of each upper arc-shaped blade. The straight blade is vertically arranged and the end is fixedly connected to the supporting vertical plate, forming a vertical upward airflow channel between two adjacent straight blades.

[0007] Preferably, an arc-shaped head blade is provided on the inner edge of the straight blade of the shutter assembly located at the top.

[0008] Preferably, the rainproof top plate includes an inclined rainproof main plate, the outer edge of which is bent vertically downward to form a rainproof folding plate, and the ends of the rainproof main plate and the rainproof folding plate are fixedly connected to the supporting vertical plates.

[0009] Preferably, the hood base includes a throat pipe, a supporting skirt plate is installed on the outer side of the middle part of the throat pipe, each supporting vertical plate is located on the outer side of the throat pipe, and the inner edge of the supporting vertical plate is fixedly connected to the outer wall of the throat pipe, and the bottom edge of the supporting vertical plate is fixedly connected to the supporting skirt plate; a hood bottom plate is also installed at the bottom of the throat pipe.

[0010] Preferably, the throat pipe is in the shape of a rectangular parallelepiped, and four supporting vertical plates are provided and are respectively located outside the four corners of the throat pipe.

[0011] Preferably, the support frame is rectangular in shape and the four corners are fixedly connected to the supporting uprights, the rain protection cone is in the shape of a quadrangular pyramid with the tip facing upward and the bottom edge fixedly connected to the support frame, and the guide cone is in the shape of a quadrangular pyramid with the tip facing downward and the top edge fixedly connected to the support frame.

[0012] The advantages and positive effects of the utility model are:

[0013] The utility model provides a louver-type hood device with a reasonable structural design. Compared with the existing hood device, the louver-type hood device in the utility model is a straight-through hood device, and the smoke is discharged to the outside in a straight-through manner, rather than being discharged to the outside through the louver assembly in all directions, so the exhaust efficiency is higher. By arranging multiple groups of louver assemblies and the guide cone in the middle, negative pressure is formed inside the hood device, so as to achieve the technical effect of pulling air upward, and can effectively prevent the external natural wind from flowing back downward into the interior of the hood device. By arranging a louver assembly composed of arc-shaped blades on the side and making the louver assembly have an airflow channel that tilts upward from the outside to the inside, under the action of the internal negative pressure environment, the horizontal natural wind is sucked in and converted into an upward airflow, which further strengthens the aforementioned air extraction effect. At the same time, the airflow that moves obliquely upward to the inside will not have an adverse effect on the smoke, thereby playing a windproof role and improving the effect of smoke exhaust. By arranging a plurality of rainproof top plates in combination with the rainproof cone in the middle, rainwater falling on the hood device is diverted to the surroundings and then discharged to the outside of the hood device through the shutter components. Therefore, the hood device has a good rainproof function. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0016] Figure 3 yes Figure 1 A schematic diagram of the structure of the stroke cap base;

[0017] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the stroke cap base, the supporting upright plate and its accessory parts;

[0018] Figure 5 yes Figure 1 Schematic diagram of the three-dimensional structure of the middle louver assembly and the rainproof top plate;

[0019] Figure 6 yes Figure 5 Schematic diagram of the main structure of the middle louver assembly.

[0020] In the figure:

[0021] 1. Hood base; 1-1. Throat pipe; 1-2. Support skirt; 1-3. Hood bottom plate; 2. Support vertical plate; 3. Shutter assembly; 3-1. Curved blade; 3-2. Straight blade; 3-3. Head blade; 4. Rainproof top plate; 5. Support frame; 6. Rainproof cone; 7. Guide cone. DETAILED DESCRIPTION

[0022] In order to further understand the content, features and effects of the present invention, the following embodiments are given to explain in detail.

[0023] See also Figure 1 and Figure 2 The louver type hood device of the utility model includes a hood base 1, a plurality of supporting uprights 2 are installed on the hood base 1, a louver assembly 3 is installed between the main bodies of adjacent supporting uprights 2, a rainproof top plate 4 is installed between the tops, a supporting frame 5 is installed between each supporting upright 2, a rainproof cone 6 is installed above the supporting frame 5, and a guide cone 7 is installed below.

[0024] The exhaust principle of the shutter type hood device is: the smoke is discharged from the exhaust duct and enters the hood base 1, and is guided upward by the guide cone 6 to the surroundings, continues to flow upward, and is finally discharged from the top exhaust port of the hood device (that is, the window between the rainproof top plates 4). The hood base 1 is used to dock with the port of the exhaust duct, the guide cone 6 is used to guide the smoke, the shutter assembly 3 is used to introduce the external natural wind into the interior, and achieves the technical effect of windproof and air extraction. The rainproof top plate 4 and the rainproof cone 6 play a rainproof effect, so that the rainwater entering the hood device is discharged.

[0025] See also Figure 3 and Figure 4 , we can see that:

[0026] The hood base 1 includes a throat duct 1-1, and a support skirt 1-2 is installed on the outer side of the middle part of the throat duct 1-1. Each support vertical plate 2 is located on the outer side of the throat duct 1-1, and the inner edge of the support vertical plate 2 is fixedly connected to the outer wall of the throat duct 1-1, and the bottom edge of the support vertical plate 2 is fixedly connected to the support skirt 1-2.

[0027] A hood bottom plate 1-3 is also installed at the bottom of the throat pipe 1-1. Specifically, a window is provided in the middle of the hood bottom plate 1-3, and the lower port of the throat pipe 1-1 is docked with the window. When the hood device is installed, the throat pipe 1-1 is docked with the port of the exhaust duct and the hood bottom plate 1-3 is fixedly connected with the connection structure arranged around the exhaust duct port.

[0028] In this embodiment, the throat duct 1-1 is in the shape of a rectangular parallelepiped, four supporting upright plates 2 are provided and are respectively located outside the four corners of the throat duct 1-1, and the inner edge of each supporting upright plate 2 is continuously welded to the convex edges at the four corners of the throat duct 1-1. Accordingly, four groups of louver assemblies 3 are provided, and four rainproof top plates 4 are provided, so that the main part of the louver type hood device is in the shape of a rectangular parallelepiped.

[0029] In this embodiment, the support frame 5 is rectangular in shape and the four corners are fixedly connected to the support uprights 2 (by welding or bolting, etc.), the rain cone 6 is a quadrangular pyramid (pyramid) with the tip facing upward and the bottom edge fixedly connected to the support frame 5, and the guide cone 7 is a quadrangular pyramid (pyramid) with the tip facing downward and the top edge fixedly connected to the support frame 5. Figure 2 As shown in , the bottom tip of the guide cone 7 can be flush with the top port of the throat pipe 1-1 and the bottom tip of the guide cone 7 is located at the center of the top port. Rainwater falling on the rainproof cone 6 is diverted to the surroundings, and the smoke flowing upward through the guide cone 7 is diverted to the surroundings.

[0030] In this embodiment, the rainproof top plate 4 includes an inclined rainproof main plate, the outer edge of which is vertically bent downward to form a rainproof folding plate, and the ends of the rainproof main plate and the rainproof folding plate are fixedly connected to the supporting vertical plate 2 (fixedly connected by welding).

[0031] See also Figure 5 and Figure 6 , we can see that:

[0032] The louver assembly 3 includes a plurality of arc-shaped blades 3-1, the ends of the arc-shaped blades 3-1 are fixedly connected to the support upright plate 2 (fixedly connected by welding), and an airflow channel inclined upward from the outside to the inside is formed between adjacent arc-shaped blades 3-1. In the process of smoke flowing upward and being discharged directly, a negative pressure environment is formed inside, and the external natural wind is attracted to the inside of the hood device. Due to the effect of the aforementioned inclined upward airflow channel, the natural wind enters the hood device and turns to flow upward, thereby further promoting the upward flow of smoke and achieving the technical effect of extracting air.

[0033] In this embodiment, each arc blade 3-1 of the louver assembly 3 is in an arc shape, and a straight blade 3-2 is provided on the inner edge of each upper arc blade 3-1. The straight blade 3-2 is vertically arranged and the end is fixedly connected to the supporting vertical plate 2 (fixedly connected in the form of welding), and a vertical upward airflow channel is formed between two adjacent straight blades 3-2. The purpose of setting the straight blade 3-2 is to form the aforementioned vertical upward airflow channel, so that the airflow entering the hood device is converted into a vertical upward flow, thereby enhancing the exhaust effect on the smoke. The arc blade 3-1 and its straight blade 3-2 can be formed by pressing the same metal plate to improve the integrity.

[0034] like Figure 2 As shown in the figure, the outer edges of the arc blades 3-1 of the shutter assembly 3 and the outer edges of the supporting uprights 2 at both ends are located on the same vertical plane. Furthermore, the inner edge of the arc blade 3-1 located at the bottom is continuously welded and fixed to the outer wall of the throat pipe 1-1.

[0035] An arc-shaped head blade 3-3 is provided on the inner edge of the straight blade 3-2 at the top of the shutter assembly 3, and the head blade 3-3 is located below the rainproof top plate 4, and an air flow channel inclined upward from outside to inside is formed between the head blade 3-3 and the rainproof top plate 4. The top arc blade 3-1 and its straight blade 3-2, and the head blade 3-3 can be made of the same metal plate by pressing to improve integrity.

[0036] Figure 6 The specific structural form of the louver assembly 3 in this embodiment is given in the figure. It can be seen that the louver assembly 3 includes seven separate blades, which are described in sequence from bottom to top: the lowest blade only includes an arc blade 3-1, whose radius is 150mm; the second to last blade includes an arc blade 3-1 and a straight blade 3-2, and the radius of the arc blade 3-1 is 123mm, and the height of the straight blade 3-2 is 90mm; the third to last blade includes an arc blade 3-1 and a straight blade 3-2, and the radius of the arc blade 3-1 is 99mm, and the height of the straight blade 3-2 is 90mm; the fourth to last blade includes an arc blade 3-1 and a straight blade 3-2, and the arc blade The radius of plate 3-1 is 78mm, and the height of straight blade 3-2 is 80mm; the fifth to last blade includes curved blade 3-1 and straight blade 3-2, and the radius of curved blade 3-1 is 60mm, and the height of straight blade 3-2 is 70mm; the sixth to last blade includes curved blade 3-1 and straight blade 3-2, and the radius of curved blade 3-1 is 45mm, and the height of straight blade 3-2 is 60mm; the top louver includes curved blade 3-1, straight blade 3-2 and head blade 3-3, and the radius of curved blade 3-1 is 33mm, the height of straight blade 3-2 is 45mm, and the curvature of head blade 3-3 is 50mm.

[0037] Of course, it is conceivable that the aforementioned dimensions of the shutter assembly 3 and the dimensions of components such as the hood base 1 can be selectively designed according to different application scenarios.

[0038] Exhaust dynamic process description:

[0039] The louver-type hood device is installed and fixed on the top port of the exhaust duct; the smoke flows upward through the exhaust duct and reaches the louver-type hood device. When the smoke flows through the guide cone 7, it is diverted to the surroundings, and then continues to flow upward, and is finally discharged from the exhaust window at the top. Therefore, it is a straight-through hood device; in this process, a negative pressure environment is formed inside the hood device, and the external natural wind is sucked into the inside. In the process of entering the hood device, the natural wind gradually turns into an upward-flowing airflow, which has a further air extraction effect on the smoke, promoting the upward flow and discharge of the smoke;

[0040] When it rains, rain falls on the louver-type hood device. Due to the barrier effect of the louver components 3 on all sides, rain will not enter the interior of the hood device laterally through the air flow channel of the louver components 3. Even under wind and rain conditions, rain cannot enter the interior from the side of the hood device. Rainwater that falls on the rainproof top plate 4 flows outward, and rainwater that falls into the interior through the exhaust window falls on the rainproof cone 6 and is diverted to the surroundings. Thereafter, the rainwater falls from the edge of the rainproof cone 6 and the supporting frame 5 and falls into the louver components 3, and is finally discharged outwardly from the air flow channel of the louver components 3, thereby achieving a good rainproof effect.

Claims

1. A shutter type hood device, characterized in that: The hood base (1) comprises a plurality of supporting uprights (2) mounted on the hood base (1), a shutter assembly (3) mounted between the main bodies of adjacent supporting uprights (2), a rainproof top plate (4) mounted between the tops, a supporting frame (5) mounted between the supporting uprights (2), a rainproof cone (6) mounted above the supporting frame (5), and a guide cone (7) mounted below the supporting frame (5); the shutter assembly (3) comprises a plurality of arc-shaped blades (3-1), the ends of the arc-shaped blades (3-1) are fixedly connected to the supporting uprights (2), and an airflow channel inclined upward from the outside to the inside is formed between adjacent arc-shaped blades (3-1).

2. The louvered hood device according to claim 1, characterized in that: Each of the arc-shaped blades (3-1) of the louver assembly (3) is in the shape of an arc, and a straight blade (3-2) is provided on the inner edge of each upper arc-shaped blade (3-1). The straight blade (3-2) is vertically arranged and its end is fixedly connected to the supporting vertical plate (2), so that a vertical upward airflow channel is formed between two adjacent straight blades (3-2).

3. The louvered hood device according to claim 2, characterized in that: An arc-shaped head blade (3-3) is provided on the inner side edge of the straight blade (3-2) located at the top of the shutter assembly (3).

4. The louver-type hood device according to claim 3, characterized in that: The rainproof top plate (4) comprises an inclined rainproof main plate, the outer edge of which is vertically bent downward to form a rainproof folding plate, and the ends of the rainproof main plate and the rainproof folding plate are fixedly connected to the supporting vertical plate (2).

5. The louver-type hood device according to any one of claims 1 to 4, characterized in that: The hood base (1) comprises a throat pipe (1-1), a support skirt plate (1-2) is installed on the outer side of the middle part of the throat pipe (1-1), each support vertical plate (2) is located on the outer side of the throat pipe (1-1), the inner edge of the support vertical plate (2) is fixedly connected to the outer wall of the throat pipe (1-1), and the bottom edge of the support vertical plate (2) is fixedly connected to the support skirt plate (1-2); and a hood bottom plate (1-3) is also installed at the bottom of the throat pipe (1-1).

6. The louver-type hood device according to claim 5, characterized in that: The throat pipe (1-1) is in the shape of a rectangular parallelepiped, and four supporting vertical plates (2) are provided and are respectively located outside the four corners of the throat pipe (1-1).

7. The louvered hood device according to claim 6, characterized in that: The support frame (5) is rectangular in shape and is fixedly connected to each support upright plate (2) at its four corners; the rainproof cone (6) is in the shape of a quadrangular pyramid with its tip facing upward and its bottom edge fixedly connected to the support frame (5); and the guide cone (7) is in the shape of a quadrangular pyramid with its tip facing downward and its top edge fixedly connected to the support frame (5).

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