Unpowered exhaust hood

Abstract

The utility model provides an unpowered exhaust hood. The unpowered exhaust hood comprises a base; the supporting assembly is mounted on the base; the air exhaust cap assembly is mounted on the supporting assembly and can rotate relative to the base, and the air exhaust cap assembly comprises a cap body and an air cap supporting mechanism mounted in the cap body; the exhaust hood assembly further comprises a fan mechanism which is installed on the hood supporting mechanism and rotates along with the hood body or the hood supporting mechanism. According to the unpowered exhaust hood, the fan mechanism rotating along with the hood body or the hood supporting mechanism is additionally arranged on the hood supporting mechanism, so that the exhaust efficiency of the unpowered exhaust hood can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of non-powered fan exhaust technology, specifically a non-powered exhaust hood. Background Technology

[0002] A non-powered ventilator (also known as a spherical ventilator or vortex ventilator) utilizes the natural wind speed to drive the turbine rotation of a fan and the principle of indoor and outdoor air convection. It accelerates and transforms any parallel airflow into a vertical upward airflow, thus improving indoor ventilation. It requires no electricity, operates silently, and can run continuously, removing heat, moisture, and pollutants from the room. Based on natural airflow principles, it is rationally installed on the top of the roof to quickly expel hot and polluted air, improving the indoor environment.

[0003] Chinese utility model patent application number 202310503885.6 discloses a non-powered wind cap for an exhaust channel with good wind-pulling effect, including a connecting ring, a support frame, a connecting glass tube, a gasket, a combined sleeve, a protrusion, and a fitting kit. The upper end of the connecting ring is fixedly connected to the wind cap body. The support frame is cross-shaped and fixedly connected inside the connecting ring. The upper end of the connecting glass tube is fixedly connected to the lower end of the connecting ring. The gasket is fixedly connected to the lower end of the connecting glass tube. The combined sleeve is fixedly connected to the lower surface of the gasket. The edge of the combined sleeve is cylindrical, and the upper end of the combined sleeve extends inward. The protrusion is fixedly connected to the lower surface of the inwardly extended end of the combined sleeve. In this application, the wind cap body is roughly spherical, resulting in high wind resistance; moreover, the top of the wind cap is usually designed with a downward convex shape, which occupies internal volume of the wind cap.

[0004] Chinese utility model patent application number 202322783557.4 discloses a non-powered fan exhaust device, including a fixed platform. Inside the fixed platform, a rotating ring is rotatably mounted via bearings, and a wind cap is welded to the top of the rotating ring. A rotating rod is fixedly connected to the inner wall of the top of the wind cap, and a mounting plate is rotatably mounted on the outer wall of the rotating rod via bearings. A main gear is fixedly connected to the bottom end of the rotating rod, and a connecting gear meshes with one side of the main gear. However, this application relies on the meshing of the main gear and the connecting gear for power transmission, resulting in significant friction, which affects the exhaust efficiency of the non-powered fan exhaust device. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a non-powered exhaust hood to reduce wind resistance and improve exhaust efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a non-powered exhaust hood, which includes:

[0007] Base;

[0008] Support assembly, which is mounted on the base;

[0009] A vent cap assembly, which is mounted on the support assembly and rotatable relative to the base, includes a cap body and a vent cap support mechanism mounted inside the cap body;

[0010] The ventilation cap assembly also includes a fan mechanism mounted on the ventilation cap support mechanism and rotating with the cap body or the ventilation cap support mechanism.

[0011] Ideally, the base includes a support sleeve and a fixing ring formed at the bottom of the support sleeve and extending outward, wherein the fixing ring has a plurality of mounting holes.

[0012] Optimally, the support assembly includes a support rod with one end mounted on the inner surface of the cap body and the other end having external threads, multiple support members mounted on the inner wall of the support sleeve and spaced apart, a lower and upper clamping sleeve sleeved on the support rod and cooperating with each other, and two adjusting nuts mounted on the external threads of the support rod and located outside the lower and upper clamping sleeves.

[0013] The inner ends of the multiple support members are clamped between the upper and lower clamps.

[0014] Furthermore, a limiting seat is installed on the inner surface of the cap body, and one end of the support rod is installed into the limiting seat.

[0015] Furthermore, each of the support members includes a support cross plate, a first bent piece formed at the end of the support cross plate and mounted on the inner wall of the support sleeve by a first fastener, and a second bent piece formed at the other end of the support cross plate by a connecting portion, the connecting portion being arc-shaped and cooperating with the support rod, and the support cross plate and the second bent piece being clamped by the upper clamp and the lower clamp.

[0016] Optimally, the cap body includes a top plate disposed above the base, a lower ring plate disposed below the top plate and sleeved on the base, and multiple exhaust blades installed between the top plate and the lower ring plate.

[0017] Preferably, the multiple exhaust blades are rotationally symmetrical about the axis of the top plate.

[0018] Furthermore, each of the exhaust blades includes a blade plate, connecting pieces formed at both ends of the blade plate, and rivets for mounting the connecting pieces to the top plate and / or the lower ring plate;

[0019] Preferably, each of the exhaust blades further includes an inner guide vane formed on the inner side of the blade plate and an outer guide vane formed on the outer side of the blade plate, the inner guide vane and the outer guide vane being located on both sides of the blade plate.

[0020] Furthermore, the support mechanism includes a turntable unit rotatably mounted on the support rod and multiple wind cap connecting rods with one end mounted on the cap body and the other end mounted on the turntable unit. The fan mechanism is penetrated by the support rod and mounted on the turntable unit.

[0021] Furthermore, the turntable unit includes a clamping plate fitted on the support rod, a cover plate fitted on the support rod and mounted on the surface of the clamping plate to connect with multiple wind cap connecting rods, a first bearing embedded in the cover plate, and a sleeve fixed in the first bearing and mounted on the support rod by a locking member.

[0022] Ideally, multiple adapter brackets are installed inside the cap body, and one end of the hood connecting rod is connected to the adapter bracket in a corresponding manner so that the hood connecting rod is higher than the base;

[0023] Ideally, the two sides of the wind cap connecting rod are formed with limiting protrusions. The cover plate includes a plate body, a plurality of connecting rod covers formed on the plate body and protruding from the plate body, a snap-fit ​​groove formed between each connecting rod cover and the plate body and cooperating with the limiting protrusions, and a first connecting hole opened on each connecting rod cover. The connecting rod covers correspond one-to-one with the wind cap connecting rod.

[0024] Furthermore, the fan mechanism includes a fan base mounted on another surface of the clamping plate and a fan mounted on the fan base, with the support rod passing through the fan base and the fan;

[0025] Ideally, a second bearing that cooperates with the support rod is embedded in the fan base;

[0026] Optimally, the fan base includes a docking plate with multiple second connection holes and a mounting seat formed at the center of the docking plate;

[0027] The fan includes a central column mounted in the mounting base and multiple fan blades formed on the circumference of the central column. A through hole that mates with the support rod is provided at the center of the central column.

[0028] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The exhaust hood of this utility model improves the exhaust efficiency of the exhaust hood by adding a fan mechanism that rotates with the hood body or the hood support mechanism to the hood support mechanism. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the non-powered exhaust hood of this utility model;

[0030] Figure 2 This is a structural schematic diagram of the non-powered exhaust hood of this utility model from another perspective;

[0031] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0032] Figure 4 This is a partial structural diagram of the support component in the non-powered exhaust hood of this utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the cover plate in the non-powered exhaust hood of this utility model;

[0034] Figure 6 This is a schematic diagram of the fan mechanism in the non-powered exhaust hood of this utility model. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figure 1 and Figure 2 The unpowered exhaust hood shown mainly includes a base 1, an exhaust hood assembly 2, and a support assembly 3.

[0037] The base 1 is typically installed at the top of the flue and is fitted with the flue. The exhaust cap assembly 2 is mounted on it via the support assembly 3. The specific shape and structure of the base 1 are not limited, as long as it can be installed on the flue using fasteners (such as bolts, screws, etc.) and support the exhaust cap assembly 2. In this embodiment, the base 1 includes a support sleeve 11 and a fixing ring 12 formed at the bottom of the support sleeve 11 and extending outward (in this case, the fixing ring 12 extends radially outward toward the support sleeve 11). The fixing ring 12 has multiple mounting holes 121, allowing conventional fasteners (such as bolts, screws, etc.) to be installed in each mounting hole 121 to achieve a fixed connection of the base 1 on the flue (e.g., ...). Figure 1 (As shown).

[0038] The support assembly 3 is mounted on the base 1 and is used to mount or support the exhaust cap assembly 2 on the base 1, allowing the exhaust cap assembly 2 to rotate relative to the base 1. Specifically, as shown... Figures 2 to 3 As shown, the support assembly 3 mainly includes a support member 31, a support rod 32, an upper clamp 33, a lower clamp 34, and an adjusting nut 35.

[0039] One end of the support rod 32 is mounted on the inner surface of the cap body, and the other end has an external thread (i.e., most of the surface area of ​​the support rod 32 is smooth, but the end facing away from the cap body has an external thread); a limiting seat 36 can be installed at the center of the inner surface of the cap body, so that one end of the support rod 32 is installed in the limiting seat 36 (the installation method is not limited, it can be directly inserted into the limiting seat 36 and then locked with a metal buckle), thereby improving the reliability and stability of the support. There are multiple support members 31 (the specific number of support members 31 can be selected according to actual needs, preferably 3 to 8, in this embodiment, 4 are equally spaced), which are installed on the inner wall of the support sleeve 11, spaced apart and extending radially along the support sleeve 11; that is, one end of the support member 31 is installed on the inner wall of the support sleeve 11, and the other end extends towards the support rod 32. The upper sleeve 33 and the lower sleeve 34 are both sleeved on the support rod 32 and are arranged to face each other. There are two adjusting nuts 35, which are installed on the external thread of the support rod 32 and are located outside the lower sleeve 34 and the upper sleeve 33 (that is, one adjusting nut 35 is located on the lower side of the lower sleeve 34 and the other adjusting nut 35 is located on the upper side of the upper sleeve 33). In this way, by adjusting the two adjusting nuts 35, the distance between the upper sleeve 33 and the lower sleeve 34 can be adjusted, and the upper sleeve 33 and the lower sleeve 34 can clamp the inner ends (i.e., the free ends) of the aforementioned multiple support members 31, so that the inner ends of the multiple support members 31 are clamped between the upper sleeve 33 and the lower sleeve 34.

[0040] The support member 31 can be a conventional support rod, support plate, or other conventional support member; more preferably, it can be... Figure 4Specifically, each support member 31 includes a support cross plate 311 extending radially along the support sleeve 11, a first bent piece 314 formed at the end of the support cross plate 311 and mounted on the inner wall of the support sleeve 11 by a first fastener (usually integral, the same below; the first bent piece 314 is approximately perpendicular to the support cross plate 311, or may be at other angles, as long as the first bent piece 314 can be fixed to the inner wall of the support sleeve 11 by a rivet), and a second bent piece 312 formed at the other end of the support cross plate 311 by a connecting portion 313, the connecting portion 313 being arc-shaped and cooperating with the support rod 32 (i.e. the connecting portion 313 can abut against the surface of the support rod 32), so that at least the support cross plate 311 and the second bent piece 312 are clamped by the upper clamp 33 and the lower clamp 34. It should be noted that the upper sleeve 33 and the lower sleeve 34 are independently provided with multiple slots (usually four); the support plate 311 and the second bent piece 312 form a certain angle, so that the support plate 311 and the second bent piece 312 can be locked by two adjacent slots, and these two slots can also accommodate the same structure as another support member 31. This not only helps to improve the support strength of the support member 31, but also greatly improves the structural stability of the entire support assembly 3 (even when the exhaust cap assembly 2 rotates or encounters extreme weather, the structural stability between the exhaust cap assembly 2, the support assembly 3 and the base 1 can be guaranteed).

[0041] As mentioned above, the exhaust cap assembly 2 is mounted on the support assembly 3 and can rotate relative to the base 1 (even without power, the exhaust cap assembly 2 can rotate relative to the base 1). The exhaust cap assembly 2 includes a cap body and a hood support mechanism 24 mounted inside the cap body. The exhaust cap assembly 2 also includes a fan mechanism 25 mounted on the hood support mechanism 24 and rotating with the cap body or the hood support mechanism 24. In this way, not only is the exhaust cap assembly 2 performing exhaust operations, but the added fan mechanism 25 can also perform exhaust operations simultaneously, improving the exhaust efficiency of the unpowered exhaust cap.

[0042] The cap body can adopt existing conventional designs, but is preferably as follows: The cap body includes a top plate 22 (which can be square, but is preferably circular; in this embodiment, the limiting seat 36 is installed at the center of the inner surface of the top plate 22 by multiple rivets), a lower ring plate 21 (the inner diameter of the lower ring plate 21 is larger than the outer diameter of the support sleeve 11, so that the lower ring plate 21 fits around the outer ring of the support sleeve 11) and multiple exhaust blades 23 installed between the top plate 22 and the lower ring plate 21. In this case, the conventional spherical cap structure is avoided, which reduces rainwater intrusion into the flue and increases the volume of the cap body to further improve exhaust efficiency. Specifically, these exhaust blades 23 are usually inclined and rotationally symmetrical about the axis of rotation of the top plate 22, so that two or more adjacent exhaust blades 23 can cooperate with each other to reduce rainwater intrusion into the flue.

[0043] In this embodiment, each exhaust blade 23 includes a blade plate 231, connecting pieces 234 formed at both ends of the blade plate 231, and rivets 235 that mount the connecting pieces 234 on the top plate 22 and / or the lower ring plate 21, thereby ensuring the connection strength of the exhaust blade 23 on the cap body. Moreover, each exhaust blade 23 also includes an inner guide baffle 232 formed on the inner side of the blade plate 231 and an outer guide baffle 233 formed on the outer side of the blade plate 231 (when the non-powered exhaust cap is installed on the flue and viewed from above, with the axis of the lower ring plate 21 as the center, the inner guide baffle 232 and the outer guide baffle 233 both extend in a counterclockwise direction), so that the inner guide baffle 232 and the outer guide baffle 233 are located on both sides of the blade plate 231. This can further reduce the intrusion of rainwater into the flue and increase the disturbance of airflow to improve exhaust efficiency.

[0044] In this embodiment, the support mechanism 24 includes a turntable unit rotatably mounted on the support rod 32 and multiple wind cap connecting rods 241 (one end of which is mounted on the cap body and the other end is mounted on the turntable unit) (the number of wind cap connecting rods 241 can be conventionally selected according to actual needs, preferably 3 to 9 rods; in this embodiment, there are 5 rods arranged radially at equal intervals). At this time, the fan mechanism 25 is penetrated by the support rod 32 and mounted on the turntable unit (on the surface away from the base 1).

[0045] The turntable unit includes a clamping plate 240 fitted onto the support rod 32, a cover plate 242 fitted onto the support rod 32 and mounted on the surface of the clamping plate 240 to connect with multiple wind cap connecting rods 241 (the cover plate 242 and the clamping plate 240 can be fitted to connect the inner ends of the wind cap connecting rods 241), a first bearing 243 embedded in the cover plate 242, and a sleeve 244 fixedly connected (the fixing method here can be a conventional method such as interference fit) in the first bearing 243 and mounted on the support rod 32 by a locking member 245 (which can be a conventional method such as screws) (the sleeve 244 is fitted onto the support rod 32 and locked on its surface by the locking member 245 without relative movement, and part of its structure protrudes from the cover plate 242). In this way, the relative rotational connection between the sleeve 244 and the cover plate 242 can be achieved through the first bearing 243 with low friction, improving the effect of the wind cap rotating without power.

[0046] Multiple adapter brackets 246 are installed inside the cap (i.e., multiple adapter brackets 246 extending upward are installed on the bottom surface of the lower ring plate 21), so that one end of the wind cap connecting rod 241 is connected to the adapter bracket 246 in a corresponding manner and the other end is connected to the turntable unit. In this way, the wind cap connecting rod 241 can be higher than the support sleeve 11 of the base 1, so as to avoid the wind cap being interfered with by the base 1 when it rotates.

[0047] The windproof hood connecting rod 241 has upwardly extending limiting protrusions 2411 on both sides. The cover plate 242 is as follows... Figure 5 As shown, the device includes a plate body 2421, multiple connecting rod covers 2423 formed on and protruding from the plate body 2421 (the number of connecting rod covers 2423 is the same as the number of wind cap connecting rods 241 and corresponds one-to-one, extending inward from the edge of the plate body 2421), a snap-fit ​​groove 2422 formed between each connecting rod cover 2423 and the plate body 2421 and cooperating with the limiting protrusion 2411 (i.e., the two sides of the connecting rod cover 2423 have snap-fit ​​grooves 2422 that cooperate with the limiting protrusion 2411), and a first connecting hole 2424 opened on each connecting rod cover 2423. In this way, conventional connectors such as rivets can be installed in the first connecting hole 2424 to connect the connecting rod cover 2423, the wind cap connecting rod 241 and the clamping plate 240 together, realizing the support of the other structures of the entire cap body by using the turntable unit combined with the support rod 32.

[0048] In this embodiment, as Figure 6 As shown, the fan mechanism 25 includes a fan base 251 mounted on another surface of the clamping plate 240 (i.e., the surface opposite to the cover plate 242) and a fan 252 mounted on the fan base 251, with the support rod 32 passing through the fan base 251 and the fan 252. A second bearing that mates with the support rod 32 can be embedded in the fan base 251 to reduce the friction between the fan mechanism 25 and the support rod 32.

[0049] The fan base 251 includes a docking plate 2512 with multiple second connecting holes 2513 and a mounting base 2511 (which is hollow) formed at the center of the docking plate 2512. Conventional bolts and other connecting parts can be installed in the second connecting holes 2513 to connect the fan base 251 to the clamping plate 240 (the connecting parts here can even be the same as those used in the first connecting hole 2424, which can reduce the number of parts and improve the overall connection strength). The fan 252 includes a central column 2521 installed in the mounting base 2511 (the second bearing can be embedded in the mounting base 2511 and the central column 2521) and multiple fan blades 2522 formed on the circumference of the central column 2521. A through hole 2523 that mates with the support rod 32 is opened at the center of the central column 2521, thereby ensuring the rotational connection between the fan mechanism 25 and the support rod 32.

[0050] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A non-powered exhaust hood, comprising: Base (1); Support component (3), which is mounted on the base (1); Vent assembly (2), which is mounted on the support assembly (3) and is rotatable relative to the base (1), includes a cap body and a vent support mechanism (24) mounted in the cap body. The feature is that the exhaust cap assembly (2) further includes a fan mechanism (25) mounted on the hood support mechanism (24) and rotating with the cap body or the hood support mechanism (24).

2. The non-powered exhaust hood according to claim 1, characterized in that: The base (1) includes a support sleeve (11) and a fixing ring (12) formed at the bottom of the support sleeve (11) and extending outward, wherein the fixing ring (12) has a plurality of mounting holes (121).

3. The non-powered exhaust hood according to claim 2, characterized in that: The support assembly (3) includes a support rod (32) with one end mounted on the inner surface of the cap body and the other end having an external thread, multiple support members (31) mounted on the inner wall of the support sleeve (11) and spaced apart, a lower sleeve (34) and an upper sleeve (33) sleeved on the support rod (32) and arranged in opposite directions, and two adjusting nuts (35) mounted on the external thread of the support rod (32) and located outside the lower sleeve (34) and the upper sleeve (33). The inner ends of the multiple support members (31) are clamped between the upper clamp (33) and the lower clamp (34).

4. The non-powered exhaust hood according to claim 3, characterized in that: A limiting seat (36) is installed on the inner surface of the cap body, and one end of the support rod (32) is installed in the limiting seat (36).

5. The non-powered exhaust hood according to claim 3, characterized in that: Each of the support members (31) includes a support plate (311), a first bent piece (314) formed at the end of the support plate (311) and mounted on the inner wall of the support sleeve (11) by a first fastener, and a second bent piece (312) formed at the other end of the support plate (311) by a connecting part (313), the connecting part (313) being arc-shaped and cooperating with the support rod (32), the support plate (311) and the second bent piece (312) being clamped by the upper clamp (33) and the lower clamp (34).

6. The non-powered exhaust hood according to claim 1, characterized in that: The cap body includes a top plate (22) disposed above the base (1), a lower ring plate (21) disposed below the top plate (22) and sleeved on the base (1), and multiple exhaust blades (23) installed between the top plate (22) and the lower ring plate (21).

7. The non-powered exhaust hood according to claim 6, characterized in that: The multiple exhaust blades (23) are rotationally symmetrical about the axis of the top plate (22).

8. The non-powered exhaust hood according to claim 6, characterized in that: Each of the exhaust blades (23) includes a blade plate (231), connecting pieces (234) formed at both ends of the blade plate (231), and rivets (235) for mounting the connecting pieces (234) on the top plate (22) and / or the lower ring plate (21).

9. The non-powered exhaust hood according to claim 6, characterized in that: Each of the exhaust blades (23) further includes an inner guide vane (232) formed on the inner side of the blade plate (231) and an outer guide vane (233) formed on the outer side of the blade plate (231), the inner guide vane (232) and the outer guide vane (233) being located on both sides of the blade plate (231).

10. The non-powered exhaust hood according to claim 3, characterized in that: The support mechanism (24) includes a turntable unit rotatably mounted on the support rod (32) and multiple wind cap connecting rods (241) with one end mounted on the cap body and the other end mounted on the turntable unit. The fan mechanism (25) is penetrated by the support rod (32) and mounted on the turntable unit.

11. The non-powered exhaust hood according to claim 10, characterized in that: The turntable unit includes a clamping plate (240) fitted on the support rod (32), a cover plate (242) fitted on the support rod (32) and mounted on the surface of the clamping plate (240) to be connected to a plurality of wind cap connecting rods (241), a first bearing (243) embedded in the cover plate (242), and a sleeve (244) fixed in the first bearing (243) and mounted on the support rod (32) by a locking member (245).

12. The non-powered exhaust hood according to claim 11, characterized in that: Multiple adapter brackets (246) are installed inside the cap body. One end of the hood connecting rod (241) is connected to the adapter bracket (246) in a corresponding manner, so that the hood connecting rod (241) is higher than the base (1).

13. The non-powered exhaust hood according to claim 11, characterized in that: The wind cap connecting rod (241) has limiting protrusions (2411) formed on both sides. The cover plate (242) includes a plate body (2421), a plurality of connecting rod covers (2423) formed on the plate body (2421) and protruding from the plate body (2421), a snap-fit ​​groove (2422) formed between each connecting rod cover (2423) and the plate body (2421) and cooperating with the limiting protrusions (2411), and a first connecting hole (2424) opened on each connecting rod cover (2423). The connecting rod cover (2423) corresponds one-to-one with the wind cap connecting rod (241).

14. The non-powered exhaust hood according to claim 11, characterized in that: The fan mechanism (25) includes a fan base (251) mounted on another surface of the clamp (240) and a fan (252) mounted on the fan base (251), with the support rod (32) passing through the fan base (251) and the fan (252).

15. The non-powered exhaust hood according to claim 14, characterized in that: The fan base (251) is embedded with a second bearing that cooperates with the support rod (32).

16. The non-powered exhaust hood according to claim 14, characterized in that: The fan base (251) includes a docking plate (2512) with a plurality of second connection holes (2513) and a mounting base (2511) formed at the center of the docking plate (2512).

17. The non-powered exhaust hood according to claim 14, characterized in that: The fan (252) includes a central column (2521) installed in the mounting base (2511) and multiple fan blades (2522) formed on the circumference of the central column (2521). A through hole (2523) that cooperates with the support rod (32) is provided at the center of the central column (2521).

Images