Roof fan convenient to maintain

Abstract

The utility model discloses a roof fan convenient to maintain, which relates to the field of fans, and adopts the technical scheme that the roof fan convenient to maintain comprises an air duct, two arc-shaped frames are arranged on the air duct, a safety net is detachably connected between the two arc-shaped frames, a replacement opening is formed in the peripheral wall of the air duct, a cover plate is hinged to the air duct, a first convex block is arranged at the movable end of the cover plate, and a second convex block is arranged at the movable end of the cover plate. A second protruding block is arranged on the air duct, the first protruding block is limited on the second protruding block through a fixing piece, and a rubber ring is arranged on the safety net. When the safety net needs to be cleaned, the cover plate rotates along the hinged position by releasing limitation of the fixing piece on the first protruding block and the second protruding block, the cover plate does not cover the replacement opening any more, and the safety net is detached from the replacement opening to be cleaned. By means of the arrangement, the safety net can be disassembled and cleaned more rapidly, after the safety net is installed, the rubber rings can deform and fill the gaps, and the leakproofness among the air duct, the cover plate and the safety net is ensured.

Description

Technical Field

[0001] This utility model relates to the field of wind turbines, and more specifically, to a rooftop wind turbine that is easy to maintain. Background Technology

[0002] Roof ventilators are ventilation devices installed on the roof of buildings. They are mainly used for indoor and outdoor air exchange to improve indoor air quality. They are suitable for various scenarios such as residential buildings, commercial buildings, and industrial plants. A roof ventilator consists of a hood, a duct, and a base. The motor and impeller are installed in the duct. The hood is mainly used to block sunlight and rain and protect the impeller and motor. A safety net is also installed at the end of the duct near the base to prevent lightweight items, such as plastic bags, from being caught in the impeller.

[0003] With the use of roof ventilators, a lot of dust will accumulate on the safety net, affecting the ventilation effect of the roof ventilator. Staff need to clean the safety net regularly. However, most existing ducts adopt an integrated design to prevent rainwater intrusion. When cleaning the safety net, staff need to separate the duct from the base to clean the safety net, which is quite inconvenient.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a roof ventilator that is easy to maintain.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a roof ventilator that is easy to maintain, including a duct, two arc-shaped frames on the inner peripheral wall of the duct, a safety net detachably connected between the two arc-shaped frames, a replacement opening for the safety net to pass through on the outer peripheral wall of the duct, a cover plate hinged to the duct for covering the replacement opening, a first protrusion on the movable end of the cover plate, a second protrusion on the outer peripheral wall of the duct, the first protrusion being limited on the second protrusion by a fixing member, and a rubber ring on the safety net for abutting against the duct and the cover plate.

[0007] The present invention is further configured such that: an annular groove for installing a rubber ring is provided on the outer peripheral wall of the safety net, the outer diameter of the safety net is smaller than the inner diameter of the air duct, and the outer diameter of the rubber ring is larger than the inner diameter of the air duct.

[0008] The present invention is further configured such that: a limiting groove is provided on the outer peripheral wall of the safety net to connect the upper and lower side walls of the safety net, and both the air duct and the cover plate are provided with a locking block for being embedded in the limiting groove.

[0009] The present invention is further configured such that: a triangular groove with a connecting limiting groove is provided on the outer peripheral wall of the rubber ring, the orthographic projection of the triangular groove on the safety net is completely located within the orthographic projection of the limiting groove on the safety net, and the locking block is used to abut against the side wall of the triangular groove.

[0010] The present invention is further configured such that: the first protrusion has a through hole for the fastener to pass through, and the second protrusion has a round hole for threaded connection with the fastener.

[0011] The present invention is further configured such that: a rain shield is provided on the outer peripheral wall of the wind duct, the position of the connection between the rain shield and the wind duct is higher than the position of the end of the rain shield away from the wind duct, and the lowest point of the rain shield is located above the top surface of the cover plate.

[0012] In summary, this utility model has the following beneficial effects:

[0013] When the safety net needs cleaning, the fasteners can be released from the constraints on protrusions one and two, allowing the cover plate to rotate along the hinge and no longer cover the replacement port. The safety net can then be removed from the replacement port for cleaning. Compared to existing technologies where the entire duct and base need to be disassembled to remove the safety net, this design makes the removal and cleaning of the safety net much faster. After cleaning the safety net and reinstalling it into the duct, the two arc-shaped frames fit against the upper and lower side walls of the safety net, maintaining its vertical position within the duct. The cover plate is then rotated to cover the replacement port. After the fasteners are used to re-fix protrusion one onto protrusion two, the rubber ring contacts the duct and cover plate. The rubber ring can deform effectively and fill the gaps between the rubber ring, the duct, and the cover plate, ensuring the airtightness between the duct, cover plate, and safety net, thereby guaranteeing the ventilation performance of the roof fan. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial cross-sectional view of the present invention;

[0016] Figure 3 This is a schematic diagram of the safety net structure in this utility model.

[0017] In the diagram: 1. Air duct; 2. Arc frame; 3. Safety net; 4. Replacement port; 5. Cover plate; 6. Protrusion 1; 7. Protrusion 2; 8. Fixing component; 9. Rubber ring; 10. Annular groove; 11. Limiting groove; 12. Locking block; 13. Triangular groove; 14. Perforation; 15. Round hole; 16. Rain shield. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Easy-to-maintain roof ventilators, such as Figure 1 and Figure 2 As shown, the device includes a hood and a duct 1. A reinforcing rod is fixedly connected to the inner wall of the duct 1 below the hood. Two arc-shaped frames 2 are located below the reinforcing rod on the inner wall of the duct 1. The orthographic projections of the two arc-shaped frames 2 on the bottom surface of the duct 1 coincide. A safety net 3 is detachably connected between the two arc-shaped frames 2. A replacement opening 4 for the safety net 3 to pass through is provided on the outer wall of the duct 1. A cover plate 5 is hinged to the duct 1 to cover the replacement opening 4. A protrusion 6 is provided at the movable end of the cover plate 5. A protrusion 7 is provided on the outer wall of the duct 1. Protrusion 6 is limited to protrusion 7 by a fixing member 8. The safety net 3 has a rubber ring 9 for abutting against the duct 1 and the cover plate 5. When cleaning the safety net 3 is required, the restriction of protrusion 6 and protrusion 7 by the fixing member 8 can be released, allowing the cover plate 5 to rotate along the hinge, so that the cover plate 5 is no longer... Cover the replacement port 4, and then the safety net 3 can be removed from the replacement port 4 for cleaning. Compared with the prior art, which requires the entire duct 1 to be separated from the base before the safety net 3 can be disassembled, the above setting makes the disassembly and cleaning of the safety net 3 much faster. After cleaning the safety net 3 and reinstalling it into the duct 1, the two arc-shaped frames 2 are respectively attached to the upper and lower side walls of the safety net 3, which can better maintain the vertical position of the safety net 3 in the duct 1. Rotate the cover plate 5 and cover the replacement port 4. Then, use the fastener 8 to fix the first protrusion 6 to the second protrusion 7. The rubber ring 9 abuts against the duct 1 and the cover plate 5. The rubber ring 9 can deform well and fill the gap between the rubber ring 9 and the duct 1 and the cover plate 5, ensuring the airtightness between the duct 1, the cover plate 5 and the safety net 3, thereby ensuring the ventilation performance of the roof fan.

[0020] like Figures 1 to 3As shown, an annular groove 10 for installing a rubber ring 9 is provided on the outer peripheral wall of the safety net 3. Specifically, the rubber ring 9 is fixedly installed in the annular groove 10 by adhesive. The annular groove 10 is designed to abut against the side wall of the rubber ring 9, making it difficult for the rubber ring 9 to move relative to the safety net 3 in the thickness direction, thus preventing the rubber ring 9 from falling off the safety net 3. The outer diameter of the safety net 3 is smaller than the inner diameter of the duct 1, while the outer diameter of the rubber ring 9 is larger than the inner diameter of the duct 1. This design ensures that the outer peripheral wall of the safety net 3 will not directly abut against the inner peripheral wall of the duct 1 or the cover plate 5. When the vibration generated during the operation of the roof ventilator causes the safety net 3 to sway relative to the duct 1, the inner peripheral wall of the duct 1 or the cover plate 5 is unlikely to have a rigid collision with the safety net 3. Instead, the rubber ring will prevent the safety net 3 from detaching from the duct 1. The safety net 3 absorbs this vibration, which not only reduces the noise of the roof fan to a certain extent, but also protects the outer wall of the safety net 3. The outer wall of the safety net 3 has a limiting groove 11 connecting the upper and lower side walls. Both the duct 1 and the cover plate 5 have locking blocks 12 for embedding in the limiting groove 11. The depth of the limiting groove 11 is less than the depth of the annular groove 10. When the cover plate 5 covers the replacement port 4, the center line connecting the locking blocks 12 on the duct 1 and the locking blocks 12 on the cover plate 5 passes through the axis of the duct 1. When installing the safety net 3 into the duct 1, the limiting groove 11 on the safety net 3 needs to be aligned with the locking blocks 12 for embedding. When the cover plate 5 covers the replacement port 4 and confines the safety net 3 within the duct 1, the locking blocks 12 on the cover plate 5 will also embed in the safety net. In another limiting groove 11 of the safety net 3, the relative rotation between the safety net 3 and the air duct 1 is not easily achieved, which can better ensure the stability of the safety net 3 in the air duct 1. A triangular groove 13 is provided on the outer peripheral wall of the rubber ring 9, which is connected to the limiting groove 11. The orthographic projection of the triangular groove 13 on the safety net 3 is completely located within the orthographic projection of the limiting groove 11 on the safety net 3. The locking block 12 is used to abut against the side wall of the triangular groove 13. When the locking block 12 on the cover plate 5 is inserted into the limiting groove 11, the locking block 12 on the cover plate 5 will abut against the side wall of one of the triangular grooves 13, pressing the rubber ring 9 toward the locking block 12 on the air duct 1, so that the locking block 12 on the air duct 1 will also simultaneously abut against the side wall of the other triangular groove 13, so that the rubber ring 9 can be well abutted by the two locking blocks 12. To increase the friction between the rubber ring 9 and the two locking blocks 12, ensuring the stability of the safety net 3 during subsequent roof ventilator operation, a through hole 14 is provided on protrusion 6 for the fastener 8 to pass through, and a round hole 15 is provided on protrusion 7 for threaded connection with the fastener 8. The threaded connection ensures that the fastener 8 restricts protrusions 6 and 7, making it difficult for the fastener 8 to separate from protrusions 6 and 7 during roof ventilator operation, thus ensuring the restraining effect of the cover plate 5 on the safety net 3. A rain shield 16 is welded to the outer peripheral wall of the duct 1. The position of the rain shield 16 at the connection point with the duct 1 is higher than the end of the rain shield 16 away from the duct 1. The lowest point of the rain shield 16 is located above the top surface of the cover plate 5. This setting can reduce the impact of rain and other weather conditions.The probability of rainwater dripping directly onto fastener 8, protrusion 6, and protrusion 7 is reduced, decreasing the likelihood of corrosion on these components and facilitating subsequent disassembly and assembly of fastener 8.

[0021] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An easy-to-maintain roof ventilator, including a duct (1), characterized in that: The inner peripheral wall of the air duct (1) is provided with two arc-shaped frames (2), and a safety net (3) is detachably connected between the two arc-shaped frames (2). The outer peripheral wall of the air duct (1) is provided with a replacement port (4) for the safety net (3) to pass through. The air duct (1) is hinged with a cover plate (5) for covering the replacement port (4). The movable end of the cover plate (5) is provided with a protrusion one (6). The outer peripheral wall of the air duct (1) is provided with a protrusion two (7). The protrusion one (6) is limited on the protrusion two (7) by a fixing member (8). The safety net (3) is provided with a rubber ring (9) for abutting against the air duct (1) and the cover plate (5).

2. The easy-to-maintain roof ventilator according to claim 1, characterized in that: The safety net (3) has an annular groove (10) for installing a rubber ring (9) on its outer peripheral wall. The outer diameter of the safety net (3) is smaller than the inner diameter of the air duct (1), and the outer diameter of the rubber ring (9) is larger than the inner diameter of the air duct (1).

3. The easy-to-maintain roof ventilator according to claim 1, characterized in that: The safety net (3) has a limiting groove (11) on its outer peripheral wall that connects the upper and lower side walls of the safety net (3). The air duct (1) and the cover plate (5) are both provided with a locking block (12) for embedding in the limiting groove (11).

4. The easy-to-maintain roof ventilator according to claim 3, characterized in that: The outer peripheral wall of the rubber ring (9) is provided with a triangular groove (13) that connects to the limiting groove (11). The orthographic projection of the triangular groove (13) on the safety net (3) is completely located within the orthographic projection of the limiting groove (11) on the safety net (3). The locking block (12) is used to abut against the side wall of the triangular groove (13).

5. The easy-to-maintain roof ventilator according to claim 1, characterized in that: The first protrusion (6) has a through hole (14) for the fastener (8) to pass through, and the second protrusion (7) has a round hole (15) for threaded connection with the fastener (8).

6. The easy-to-maintain roof ventilator according to claim 1, characterized in that: The outer peripheral wall of the wind duct (1) is provided with a rain shield (16). The position of the connection between the rain shield (16) and the wind duct (1) is higher than the position of the end of the rain shield (16) away from the wind duct (1). The lowest point on the rain shield (16) is located above the top surface of the cover plate (5).

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