Metal louvered ventilation fan

Abstract

The utility model relates to ventilation fan technical field discloses a metal louver ventilation fan, including sheet metal frame and fan, one side of sheet metal frame is equipped with the mesh enclosure, the mesh enclosure middle part is equipped with the fan, the other side of sheet metal frame is equipped with the rain cover, the both sides inner wall of sheet metal frame rotatable is equipped with the louver blade, the rain cover bottom is equipped with the air outlet shell, the inside of air outlet shell is equipped with the guide shell, the utility model discloses when ventilating, the wind force generated by fan blows to louver blade and makes louver blade rotate and open, makes the air enter to the rain cover, and the air can be directly discharged along with the wind force through the air outlet shell and set down, can effectively avoid the rainwater backflow through the air outlet shell and set down.

Description

Technical Field

[0001] This utility model relates to the field of ventilation fan technology, specifically a metal louvered ventilation fan. Background Technology

[0002] A louvered exhaust fan, also known as a window exhaust fan, is a household appliance that is typically installed on a wall or window. The louvers allow for adjustment of the airflow direction, and when not ventilating, the louvers close to prevent backflow of air.

[0003] For example, an existing Chinese patent (CN221120390U) discloses a metal louvered ventilation fan, including a fan housing, fan blades, and louvers. A motor is fixedly installed inside the fan housing, and the fan blades are fixedly installed on the drive shaft of the motor. A mounting base is fixedly installed at the upper end of the fan housing. The louvers are rotatably connected to the mounting base via a rotating shaft. A positioning rod is movably hinged to the inner side of the louvers via a fixed hinge seat. A receiving groove is formed on the air inlet end face of the fan housing, and a movable hinge seat is slidably connected inside the receiving groove. A transmission stud is rotatably connected to the side of the fan housing near the receiving groove via a connecting seat. A U-shaped seat is threaded onto the transmission stud. This patent facilitates wiping and cleaning the fan blades inside the fan housing, reducing the amount of wiping and cleaning operations and improving the convenience of regular maintenance of the fan blades inside the fan housing.

[0004] However, when the louvered part of the current louvered exhaust fan is installed outdoors, there are still structural gaps after the louvers are closed. This causes rainwater to backflow into the room through the gaps between the louvers, resulting in problems such as water seepage on the walls, water accumulation on the floors, and even short circuits in the equipment, which seriously affects the user experience and product reliability. Utility Model Content

[0005] The purpose of this invention is to provide a metal louvered ventilation fan to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a metal louvered ventilation fan, comprising a sheet metal frame and a fan, wherein a mesh cover is provided on one side of the sheet metal frame, the fan is provided in the middle of the mesh cover, a rain cover is provided on the other side of the sheet metal frame, louvers are rotatably provided between the inner walls of the two sides of the sheet metal frame, an air outlet shell is provided at the bottom of the rain cover, a guide shell is provided inside the air outlet shell, the outer contour of the guide shell and the inner contour of the air outlet shell are in clearance fit, a sealing plate is provided at the bottom of the guide shell, and spring sleeve rods are provided at both ends of the sealing plate.

[0007] Furthermore, the guide shell has air outlet grooves in its surrounding side walls, an air outlet is provided at the bottom of the air outlet shell, and the sealing plate can fit into the bottom of the air outlet shell.

[0008] Furthermore, the spring sleeve includes a guide rod and a spring. The top end of the guide rod is fixed to the bottom outer wall of the rain cover. The sealing plate has guide holes at both ends that cooperate with the guide rod. The top end of the spring is fixed to the bottom outer wall of the rain cover. The bottom end of the spring is fixed to the top surface of the sealing plate. An elastic protective cover is provided on the outside of the spring.

[0009] Furthermore, a junction box is provided on one side of the outer wall of the mesh cover, and a flange is provided at the connection end between the sheet metal frame and the mesh cover.

[0010] Furthermore, electromagnets are fixed to the outer walls on both sides of the bottom of the air outlet shell, and the top of the sealing plate, located below the electromagnets, is made of a magnetically conductive material.

[0011] Furthermore, a rotating arm is fixed to the middle of the bottom surface of the louver, and a connecting rod is rotatably connected to one end of the rotating arm.

[0012] Furthermore, the rain cover and the sheet metal frame are connected by an interference fit.

[0013] Furthermore, a limiting plate is provided at the bottom end of the guide rod, and the diameter of the limiting plate is larger than the diameter of the guide hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model, through the design of a sheet metal frame, rain cover, and sealing plate, enables the entire device to be installed on the ventilation opening of a window or wall via the flange of the sheet metal frame when the metal louver ventilation fan is in use. The fan exhausts indoor air to the outside to achieve ventilation. At this time, the rain cover provides overall rain protection for the outer end of the louvers, preventing rainwater from flowing back into the room through the gaps after the louvers are closed. During ventilation, the wind generated by the fan blows the louvers, causing them to rotate and open, allowing air to enter the rain cover. The air is then blown through the air outlet shell onto the sealing plate. Under normal conditions, the electromagnet is closed, leaving a gap between the sealing plate and the air outlet shell, allowing the air to be discharged directly. The downward air outlet design effectively prevents rainwater from flowing back in. When ventilation is not required, the electromagnet can be activated to attract the sealing plate, causing the sealing plate to rise and tightly seal against the bottom surface of the air outlet casing, preventing outside air from entering the room.

[0015] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0016] Figure 1 This is a perspective view of a metal louvered ventilation fan according to the present invention. Figure 2 This is an exploded view of a metal louvered ventilation fan according to this utility model. Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a perspective view of a metal louvered ventilation fan according to the present invention. Figure 5 This is a front sectional view of a metal louvered ventilation fan according to this utility model; Figure 6 for Figure 5 Enlarged structural diagram at point B.

[0017] In the diagram: 1. Sheet metal frame; 2. Mesh cover; 3. Fan; 4. Junction box; 5. Rain cover; 6. Air outlet shell; 7. Electromagnet; 8. Louver; 9. Sealing plate; 10. Guide shell; 11. Air outlet slot; 12. Guide rod; 13. Spring; 14. Elastic protective cover; 15. Connecting rod; 16. Swing arm. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figures 1-6 This utility model provides a technical solution: a metal louvered ventilation fan, including a sheet metal frame 1 and a fan 3. A mesh cover 2 is provided on one side of the sheet metal frame 1. The sheet metal frame 1 is manufactured using an advanced one-piece molding process, and galvanized sheet with a thickness of 1.0mm is selected as the raw material. In the processing stage, a folding process is adopted: first, the sheet metal is folded 180° flat to form a regular and stable frame flange edge, used for the installation of the mesh cover 2 and the overall installation and fixation of the ventilation fan; next, the sheet metal is bent 90° to shape a louvered frame that meets the design requirements, used for installing the louvered blades 8; finally, it is folded 90° in the opposite direction to form an inward reinforcing edge at the end of the louvered frame, increasing the strength of the louvered frame and improving the overall torsional resistance of the frame.

[0020] A fan 3 is located in the center of the mesh cover 2, and the fan 3 is fixed to the center of the mesh cover 2 with bolts. The mesh cover 2 is connected to the inner wall of the sheet metal frame 1 with screws. A rain cover 5 is located on the other side of the sheet metal frame 1. Louvers 8 are rotatably installed between the inner walls of the two sides of the sheet metal frame 1. An air outlet shell 6 is located at the bottom of the rain cover 5. The rain cover 5 is pressed into the outer edge of the sheet metal frame 1 with an interference fit of 0.3mm. The louvers 8 are connected to the inner walls of the frame on both sides through a rotating shaft. A guide shell 10 is provided inside the air outlet shell 6. The outer contour of the guide shell 10 and the inner contour of the air outlet shell 6 are in clearance fit. The clearance design allows the guide shell 10 to move smoothly under wind pressure, while also buffering the impact of airflow and reducing noise; at the same time, it prevents the structure from jamming due to thermal expansion and contraction.

[0021] Air outlet slots 11 are formed in the inner walls of the guide housing 10, and an air outlet is provided at the bottom of the air outlet housing 6. The sealing plate 9 can fit against the bottom of the air outlet housing 6. The bottom of the guide housing 10 is provided with a sealing plate 9, and spring sleeve rods are provided at both ends of the sealing plate 9. The sealing plate 9 is movably set at the bottom of the air outlet housing 6 by the spring sleeve rods. Under wind conditions, the sealing plate 9 can dynamically adjust up and down according to the wind pressure, so that the air outlet slots 11 on the guide housing 10 increase or decrease leakage, thereby automatically adjusting the air volume.

[0022] The spring sleeve includes a guide rod 12 and a spring 13. The top end of the guide rod 12 is fixed to the bottom outer wall of the rain cover 5. Guide holes that mate with the guide rod 12 are provided at both ends of the sealing plate 9. The top end of the spring 13 is fixed to the bottom outer wall of the rain cover 5, and the bottom end of the spring 13 is fixed to the top surface of the sealing plate 9. An elastic protective cover 14 is provided on the outside of the spring 13. The protective cover 14 prevents rainwater and dust from entering the interior of the spring 13 and prevents the elasticity from weakening due to corrosion. A junction box 4 is provided on one outer wall of the mesh cover 2, and a flange is provided at the connection end between the sheet metal frame 1 and the mesh cover 2. The junction box 4 is fixed to the outside of the mesh cover 2, and the flange is connected to the wall by bolts.

[0023] Electromagnets 7 are fixed to the outer walls of both sides of the bottom of the air outlet casing 6. The area below the electromagnets 7 on the top of the sealing plate 9 is made of magnetic material. The electromagnets 7 are fixed to the side walls of the air outlet casing 6 with bolts, and the corresponding area of ​​the sealing plate 9 is made of 2mm thick magnetic steel plate. When the electromagnets 7 are energized, they generate a magnetic field, which attracts the sealing plate 9 to rise and achieve a complete seal, blocking the backflow path of rainwater during heavy rain. A rain sensor can be installed on the outer wall of the top of the rain cover, and a controller can be set in the junction box to achieve linkage. Specifically, after the rain sensor detects rainwater, the controller controls the fan 3 to shut down, and at the same time, the electromagnets 7 start to attract the sealing plate 9, achieving a seal.

[0024] A rotating arm 16 is fixed to the middle of the bottom surface of the louver 8, and a connecting rod 15 is rotatably connected to one end of the rotating arm 16 to support the louver 8.

[0025] The rain cover 5 and the sheet metal frame 1 are connected by an interference fit. The rain cover 5 is pressed into the outer edge of the sheet metal frame 1 with an interference fit of 0.3mm, and waterproof sealant is applied to the mating surfaces to improve the sealing effect.

[0026] A limiting plate is provided at the bottom end of the guide rod 12. The diameter of the limiting plate is larger than the diameter of the guide hole. The limiting plate is fixed to the bottom end of the guide rod 12 by welding. The diameter is larger than the guide hole to limit the maximum displacement of the sealing plate 9 and prevent the sealing plate 9 from falling off.

[0027] When using a metal louvered ventilation fan, the entire device is installed on the ventilation opening of the window or wall through the flange of the sheet metal frame 1. The fan 3 exhausts the indoor air to the outside to achieve ventilation. At this time, the rain cover 5 provides overall rain protection for the outer end of the louver 8 to prevent rainwater from flowing back into the room through the gap after the louver 8 is closed. During ventilation, the wind generated by the fan 3 blows the louvers 8, causing them to rotate and open, allowing air to enter the rain cover 5. The air is then blown by the wind through the air outlet shell 6 to the sealing plate 9. Under normal conditions, the electromagnet 7 is closed, and there is a gap between the sealing plate 9 and the air outlet shell 6, allowing air to be discharged directly. The downward air outlet design of the air outlet shell 6 effectively prevents rainwater from flowing back in. When ventilation is not required, the electromagnet 7 can be activated to attract the sealing plate 9, causing the sealing plate 9 to rise and tightly seal the bottom surface of the air outlet shell 6, preventing outside air from entering the room.

[0028] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A metal louvered ventilation fan, comprising a sheet metal frame (1) and a fan (3), characterized in that: The sheet metal frame (1) is provided with a mesh cover (2) on one side, and a fan (3) is provided in the middle of the mesh cover (2). The sheet metal frame (1) is provided with a rain cover (5) on the other side. Louvers (8) are provided between the inner walls of the two sides of the sheet metal frame (1). An air outlet shell (6) is provided at the bottom of the rain cover (5). A guide shell (10) is provided inside the air outlet shell (6). The outer contour of the guide shell (10) and the inner contour of the air outlet shell (6) are in clearance fit. A sealing plate (9) is provided at the bottom of the guide shell (10). Spring sleeve rods are provided at both ends of the sealing plate (9).

2. The metal louvered ventilation fan according to claim 1, characterized in that: The guide shell (10) has an air outlet groove (11) in the inner side wall around it, the air outlet shell (6) has an air outlet at the bottom, and the sealing plate (9) can fit into the bottom of the air outlet shell (6).

3. A metal louvered ventilation fan according to claim 1, characterized in that: The spring sleeve includes a guide rod (12) and a spring (13). The top end of the guide rod (12) is fixed to the bottom outer wall of the rain cover (5). The sealing plate (9) has guide holes at both ends that cooperate with the guide rod (12). The top end of the spring (13) is fixed to the bottom outer wall of the rain cover (5). The bottom end of the spring (13) is fixed to the top surface of the sealing plate (9). An elastic protective cover (14) is provided on the outside of the spring (13).

4. A metal louvered ventilation fan according to claim 1, characterized in that: A junction box (4) is provided on one side of the outer wall of the mesh cover (2), and a flange is provided at the connection end between the sheet metal frame (1) and the mesh cover (2).

5. A metal louvered ventilation fan according to claim 1, characterized in that: Electromagnets (7) are fixed on the outer walls of both sides of the bottom of the air outlet shell (6), and the top of the sealing plate (9) is made of magnetic material in the area below the electromagnets (7).

6. A metal louvered ventilation fan according to claim 1, characterized in that: A rotating arm (16) is fixed in the middle of the bottom surface of the louver (8), and a connecting rod (15) is rotatably connected to one end of the rotating arm (16).

7. A metal louvered ventilation fan according to claim 1, characterized in that: The rain cover (5) and the sheet metal frame (1) are connected by an interference fit.

8. A metal louvered ventilation fan according to claim 3, characterized in that: The bottom end of the guide rod (12) is provided with a limiting plate, the diameter of which is larger than the diameter of the guide hole.

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