A sealing structure of a ventilation fan

Abstract

The utility model discloses a sealing structure of ventilation fan, including ventilation fan main part, ventilation fan main part includes ventilation fan frame and with ventilation fan frame swing joint ventilation fan fan blade, still include first sealing piece, first sealing piece set in the lower extreme of ventilation fan fan blade, when first sealing piece will seal the adjacent ventilation fan fan blade junction when ventilation fan fan blade closes.

Description

Technical Field

[0001] This utility model relates to ventilation fans, and more particularly to a sealing structure for ventilation fans. Background Technology

[0002] Exhaust fans are increasingly popular due to their small footprint when turned on and their ability to provide good ventilation while maintaining privacy. Adjustable-angle exhaust fans can even simultaneously provide ventilation and sunshade, keeping indoor air fresh while maintaining heat and energy efficiency. However, the sealing between the blades of current exhaust fans is relatively poor, thus requiring improvement. Summary of the Invention

[0003] This utility model addresses the shortcomings of existing ventilation fans, such as poor sealing between the fan blades, by providing a new sealing structure for ventilation fans.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: A sealing structure for an exhaust fan includes an exhaust fan body, the exhaust fan body including an exhaust fan frame and exhaust fan blades movably connected to the exhaust fan frame, and also includes a first sealing member disposed at the lower end of the exhaust fan blades. When the exhaust fan blades are closed, the first sealing member seals the connection between adjacent exhaust fan blades.

[0005] This application improves the sealing performance of the ventilation fan blades when they are closed by using a sealing element installed at the lower end of the ventilation fan blades.

[0006] Preferably, in the sealing structure of the ventilation fan described above, the upper end of the ventilation fan blade is recessed to form a first sealing part, and the lower end of the ventilation fan blade is provided with a second sealing part. When the ventilation fan blade is closed, the second sealing part cooperates with the first sealing part.

[0007] Preferably, in the sealing structure of the ventilation fan described above, the second sealing part is in the shape of a barb, and the second sealing part is provided with a mounting groove, in which the first sealing element is installed.

[0008] Preferably, in the sealing structure of the ventilation fan described above, the mounting groove is further provided with fixing ribs for fixing the first sealing element.

[0009] Preferably, in the sealing structure of the ventilation fan described above, the first sealing element is provided with a first sealing protrusion.

[0010] Preferably, the sealing structure of the ventilation fan described above further includes a second sealing member, which is arranged around the ventilation fan blades. When the ventilation fan blades are closed, the ventilation fan blades cooperate with the second sealing member to seal.

[0011] Preferably, in the sealing structure of the ventilation fan described above, the second sealing member is further provided with a second sealing protrusion near the upper end of the ventilation fan blade, and when the ventilation fan blade is closed, the first sealing protrusion and the second sealing protrusion cooperate to seal.

[0012] The present invention has the following advantages through the above structural improvements: This application employs a multi-layered sealing design consisting of a "sealing element + concave-convex fit structure + sealing protrusion" to progressively fill the gaps between the fan blades, effectively blocking air convection, dust penetration, and noise transmission. This significantly improves the overall performance of the ventilation fan in terms of heat preservation, sound insulation, and dust prevention. Furthermore, the combination design of the mounting groove and fixing ribs ensures that the sealing element is firmly installed and not easily detached, making it suitable for frequent switching and angle adjustments of the ventilation fan, and ensuring long-term stable sealing performance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the main body of the ventilation fan of this utility model; Figure 2 This is a three-dimensional structural diagram of the ventilation fan blade of this utility model; Figure 3 This utility model Figure 2 Enlarged view of part A in the middle; Figure 4 This utility model Figure 1 A magnified view of part B in the middle.

[0014] Reference numerals: 1. Main body of the ventilation fan; 11. Frame of the ventilation fan; 12. Fan blades of the ventilation fan; 121. First sealing part; 122. Second sealing part; 1221. Mounting groove; 2. First seal; 21. First sealing protrusion; 3. Fixing reinforcement bars; 4. Second seal; 41. Second sealing protrusion. Detailed Implementation

[0015] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the present invention: Example

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a sealing structure for an exhaust fan includes an exhaust fan body 1. The exhaust fan body 1 includes an exhaust fan frame 11 and exhaust fan blades 12 movably connected to the exhaust fan frame 11. It also includes a first sealing member 2, which is disposed at the lower end of the exhaust fan blades 12. When the exhaust fan blades 12 are closed, the first sealing member 2 seals the connection between adjacent exhaust fan blades 12.

[0017] Preferably, the upper end of the ventilation fan blade 12 is recessed to form a first sealing part 121, and the lower end of the ventilation fan blade 12 is provided with a second sealing part 122. When the ventilation fan blade 12 is closed, the second sealing part 122 cooperates with the first sealing part 121.

[0018] Specifically, the "recessed fit" structural design enables the connection of adjacent ventilation fan blades 12 to form a precise alignment and fit relationship, avoiding the failure of the first seal 2 due to misalignment. At the same time, it increases the contact area and sealing fit between ventilation fan blades 12, further optimizing the sealing effect and improving the reliability of the sealing structure.

[0019] Preferably, the second sealing part 122 is in the shape of a barb, and the second sealing part 122 is provided with a mounting groove 1221, and the first sealing member 2 is installed in the mounting groove 1221.

[0020] Specifically, the barbed structure gives the mounting groove a natural limiting function, which can prevent the first seal 2 from falling off or shifting from the mounting groove 1221; The design of the mounting slot 1221 provides a dedicated installation space for the first seal 2, ensuring that the first seal 2 is installed in a precise and stable position. This simplifies the assembly process of the first seal 2 and ensures that the first seal 2 is always in an effective sealing position during the movement of the ventilation fan blade 12, thus maintaining sealing stability.

[0021] Preferably, the mounting groove 1221 is further provided with a fixing rib 3 for fixing the first sealing member 2.

[0022] Specifically, a fixing rib 3 is added to the mounting groove 1221 to form a double fixation for the first seal 2, which further enhances the connection between the first seal 2 and the mounting groove 1221, avoids the first seal 2 from loosening or shifting due to frequent activities such as switching on and off the ventilation fan and adjusting the angle, extends the service life of the sealing structure, and ensures that the sealing effect does not decrease during long-term use.

[0023] Preferably, the first sealing member 2 is provided with a first sealing protrusion 21.

[0024] Specifically, the first sealing protrusion 21 can increase the contact pressure between the first sealing element 2 and the adjacent ventilation fan blade 12, so that the first sealing element 2 and the surface of the ventilation fan blade 12 form a "point-to-surface" sealing contact, which can fill the tiny imperfections or gaps on the surface of the ventilation fan blade 12, achieving a dual sealing effect of "precise filling + tight fit", greatly improving the upper limit of sealing performance, and further optimizing the actual use effects such as sound insulation, heat preservation, and dust prevention.

[0025] Preferably, a second seal 4 is also included, which is disposed around the ventilation fan blade 12, and when the ventilation fan blade 12 is closed, the ventilation fan blade 12 cooperates with the second seal 4 to seal.

[0026] Specifically, the second seal 4 and the first seal 2 form a double sealing fit. The first seal 2 focuses on the core gap between the fan blades, while the second seal 4 seals the edge gap between the fan blade 12 and the frame. The two perform their respective functions and complement each other, avoiding the weak links of a single sealing structure, greatly improving the stability of the overall sealing performance of the ventilation fan, and ensuring a more balanced effect of heat preservation, sound insulation and dust prevention when closed.

[0027] Preferably, the second sealing member 4 is further provided with a second sealing protrusion 41 near the upper end of the ventilation fan blade 12. When the ventilation fan blade 12 is closed, the first sealing protrusion 21 and the second sealing protrusion 41 cooperate to seal.

[0028] Specifically, the second sealing protrusion 41 on the second seal 4 and the first sealing protrusion 21 on the first seal 2 form a "double protrusion fitting" structure. The protrusion design can increase the pressure when the seal contacts, so that the two sealing protrusions are tightly squeezed and fitted together. This can accurately fill the tiny assembly gaps or surface defects that may exist when the fan blade is closed, achieving a double seal of "physical blocking + tight fitting", further improving the tightness of the seal.

[0029] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A sealing structure for a ventilation fan, comprising a ventilation fan body (1), the ventilation fan body (1) comprising a ventilation fan frame (11) and ventilation fan blades (12) movably connected to the ventilation fan frame (11), characterized in that: It also includes a first sealing element (2), which is disposed at the lower end of the ventilation fan blade (12). When the ventilation fan blade (12) is closed, the first sealing element (2) will seal the connection between adjacent ventilation fan blades (12). The upper end of the ventilation fan blade (12) is recessed inward to form a first sealing part (121). The lower end of the ventilation fan blade (12) is provided with a second sealing part (122). When the ventilation fan blade (12) is closed, the second sealing part (122) cooperates with the first sealing part (121). The second sealing part (122) is hook-shaped. The second sealing part (122) is provided with an installation groove (1221). The first sealing element (2) is installed in the installation groove (1221). The installation groove (1221) is also provided with a fixing rib (3) for fixing the first sealing element (2).

2. The sealing structure of a ventilation fan according to claim 1, characterized in that: The first sealing element (2) is provided with a first sealing protrusion (21).

3. The sealing structure of a ventilation fan according to claim 2, characterized in that: It also includes a second seal (4), which is arranged around the ventilation fan blade (12) and the ventilation fan blade (12) cooperates with the second seal (4) to seal when the ventilation fan blade (12) is closed.

4. The sealing structure of a ventilation fan according to claim 3, characterized in that: The second sealing member (4) is provided with a second sealing protrusion (41) near the upper end of the ventilation fan blade (12). When the ventilation fan blade (12) is closed, the first sealing protrusion (21) and the second sealing protrusion (41) cooperate to seal.

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