damper

Abstract

The application provides a damper, which comprises a damper frame, an air inlet, a baffle and a waterproof motor, the waterproof motor drives the baffle to rotate to open or close the air inlet; the waterproof motor comprises a motor and a sealing shell wrapping the motor, the motor comprises: a motor body provided with a motor rotating shaft; a speed reduction gear set comprising a plurality of gear structures and being respectively installed in the motor body and forming a rotating connection, the plurality of gear structures are arranged in turn along a direction surrounding the motor rotating shaft; along the direction in which the plurality of gear structures are arranged, two adjacent gear structures are engaged with each other; a cover is arranged on the shell and makes the speed reduction gear set encapsulated in the shell, the cover is provided with a through hole, an output shaft of the speed reduction gear set passes through the through hole and forms a sealed rotating connection with an inner circumferential side thereof; the sealing shell is fixed to the damper frame and seals the motor, and the output shaft of the speed reduction gear set is connected with the baffle. Compared with the related art, the damper of the application has good waterproof reliability, simple assembly and small size.

Description

Technical Field

[0001] This invention relates to the field of home appliance accessories technology, and in particular to a damper used in home appliances such as refrigerators. Background Technology

[0002] Refrigerators are one of the most commonly used appliances in the home. They maintain a low temperature in a sealed space to preserve and keep food fresh. Refrigerators also need ventilation during the cooling process, which is usually achieved by opening and closing the vents.

[0003] The existing damper includes a damper frame installed on the bottom side wall of the refrigerator, an air vent penetrating one side of the damper frame, a baffle supported in the damper frame and rotatably connected to the damper frame, a sealing box formed at one end of the damper frame, and a reduction gear set and a motor installed in the sealing box. The baffle is directly opposite the air vent, the reduction gear set is connected to the output shaft of the motor, and the output shaft of the reduction gear set extends to the outside of the sealing box and is connected to the baffle. The reduction gear set converts the speed of the motor into a certain torque to drive the baffle to rotate, thereby opening or closing the air vent to achieve ventilation.

[0004] However, in existing dampers, a sealing box is used to waterproof the motor. However, the structure of separately installing the motor and reduction gear set inside the sealing box is quite complex. First, the sealing box must be integrally molded during the production of the damper frame. Then, the motor and each gear of the reduction gear set are manually installed into the sealing box, and finally, the sealing cover is tightened with screws. Although the sealing box provides some waterproofing, the motor is only waterproofed through the single-layer waterproof structure of the sealing box and the screw-tightened sealing cover. When used inside a refrigerator, there is still a risk of leakage. If the sealing box leaks, it will freeze, causing the damper to fail, and its reliability needs improvement. Furthermore, the multiple gears of the reduction gear set are arranged and assembled horizontally outside the motor area within the sealing box. This not only involves numerous assembly steps and low precision, resulting in high labor costs, but also wastes a lot of space in the radial direction of the motor after gear assembly, making the overall volume of the sealing box larger.

[0005] Therefore, it is necessary to provide a new type of damper to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a damper that is waterproof, reliable, easy to assemble, and small in size.

[0007] To solve the above-mentioned technical problems, the present invention provides a damper, including a damper frame, an air outlet opened on one side of the damper frame, a baffle plate supported in the damper frame and rotatably connected to the damper frame, and a waterproof motor fixed to one end of the damper frame. The waterproof motor is connected to the baffle plate to drive the baffle plate to rotate, so that the baffle plate opens or closes the air outlet. The waterproof motor includes a motor and a sealing shell enclosing the motor. The motor includes:

[0008] The motor body includes a housing with a receiving space and an opening at one end and a closing at the other end, a stator and a rotor installed in the housing, a support plate with a shaft hole fixed in the housing and encapsulating the stator and rotor in the housing, and a motor shaft extending from the rotor through the shaft hole.

[0009] A reduction gear set, comprising multiple gear structures respectively mounted on the side of the support plate away from the stator, wherein each gear structure is rotatably connected to the support plate and is housed within the housing, and the multiple gear structures are arranged sequentially around the motor shaft; adjacent gear structures mesh with each other along the direction of their arrangement; and...

[0010] A cover is provided on the open end of the housing and encapsulates the reduction gear set inside the housing. The cover has a through hole, through which the output shaft of the reduction gear set passes and forms a sealed rotatable connection with the inner circumference of the through hole.

[0011] The sealing shell is fixed to the damper frame and seals the motor, and the output shaft of the reduction gear set is connected to the wind deflector.

[0012] Preferably, the sealing shell includes an upper sealing cover, the shape of which is adapted to the housing and fitted onto the housing, and the open end of the upper sealing cover is fixed to the damper frame by ultrasonic welding to seal the motor.

[0013] Preferably, the sealing shell includes an upper sealing cover and a lower sealing cover. The shape of the upper sealing cover is adapted to the housing and is fitted onto the housing. The lower sealing cover includes a sealing cover body covering the open end of the upper sealing cover, a through hole penetrating the sealing cover body, and a mounting hole formed on the periphery of the sealing cover body. The periphery of the sealing cover body is fixed to the upper sealing cover to form a seal. The output shaft of the reduction gear set passes through the through hole and forms a sealed rotatable connection with the inner periphery of the through hole. The sealing shell is fixed to the damper frame by screws passing through the mounting hole.

[0014] Preferably, the reduction gear set includes a first gear structure, a second gear structure, a third gear structure, a fourth gear structure, a fifth gear structure, a sixth gear structure, and the output shaft, all housed within the upper sealing cover and meshing sequentially.

[0015] The first gear structure includes a first gear fixed to the motor shaft and coaxially arranged; the second gear structure, the third gear structure, the fourth gear structure, the fifth gear structure, and the sixth gear structure are arranged around the first gear structure.

[0016] The second gear structure includes a second rotating shaft supported on the support plate and forming a rotatable connection, and a second lower gear and a second upper gear respectively fixed to the second rotating shaft. The second upper gear is stacked and fixed on the side of the second lower gear away from the support plate and is a synchronous gear to each other. The diameter of the second lower gear is smaller than the diameter of the second upper gear. The second upper gear meshes with the first gear.

[0017] The third gear structure includes a third rotating shaft supported on the support plate and forming a rotatable connection, and a third lower gear and a third upper gear respectively fixed to the third rotating shaft. The third upper gear is stacked and fixed on the side of the third lower gear away from the support plate and is a synchronous gear to each other. The diameter of the third lower gear is smaller than the diameter of the third upper gear. The third upper gear meshes with the second lower gear.

[0018] The fourth gear structure includes a fourth rotating shaft supported on the support plate and forming a rotatable connection, and a fourth lower gear and a fourth upper gear respectively fixed to the fourth rotating shaft. The fourth upper gear is stacked and fixed on the side of the fourth lower gear away from the support plate and is a synchronous gear to each other. The diameter of the fourth lower gear is larger than the diameter of the fourth upper gear, and the fourth lower gear meshes with the third lower gear.

[0019] The fifth gear structure includes a fifth rotating shaft supported on the support plate and forming a rotatable connection, and a fifth lower gear and a fifth upper gear respectively fixed to the fifth rotating shaft. The fifth upper gear is stacked and fixed on the side of the fifth lower gear away from the support plate and is a synchronous gear to each other. The diameter of the fifth lower gear is larger than the diameter of the fifth upper gear, and the fifth lower gear meshes with the fourth upper gear.

[0020] The sixth gear structure includes a sixth rotating shaft supported on the support plate and forming a rotatable connection, and a sixth gear fixed to the sixth rotating shaft. The sixth gear meshes with the fifth upper gear, and the output shaft is fixed to the side of the sixth gear away from the support plate.

[0021] Preferably, the orthographic projection of each gear structure onto the motor body along the axial direction of the motor body falls entirely within the range of the support plate, and the orthographic projection portions of some gear structures overlap.

[0022] Preferably, the reduction gear set achieves a speed ratio between the output shaft and the motor shaft ranging from 1:103 to 1:310.

[0023] Preferably, the reduction gear set achieves a speed ratio of 1:208 between the output shaft and the motor shaft.

[0024] Compared with the prior art, the damper of the present invention includes a waterproof motor for driving the baffle to open or close the air vent. The motor comprises a motor body and a reduction gear set, with the reduction gear set integrated within the housing of the motor body. The sealing housing is fixed to the damper frame and seals the motor, and the output shaft of the reduction gear set is connected to the baffle. This structure creates an integral motor structure with the reduction gear set, resulting in better waterproofing, higher damper reliability, and eliminating the need for the sealing box used in the prior art for assembling the reduction gear set, thus reducing assembly structure and production costs. Furthermore, the reduction gear set includes multiple gear structures mounted on support plates within the housing. Each gear structure is rotatably connected to the support plate. The gear structures are arranged sequentially around the motor shaft of the motor body, and adjacent gear structures mesh with each other along the direction of the motor shaft's rotation. Through the structural design of the aforementioned reduction gear set, the outer "disc" space of the motor body centered on its motor shaft is cleverly utilized. By rationally arranging multiple gear structures in this space, the installation of each gear structure is achieved quickly and with high precision, which improves production efficiency and reduces production costs. At the same time, it avoids wasting space and makes the overall structure of the damper smaller. Attached Figure Description

[0025] The present invention will now be described in detail with reference to the accompanying drawings. The above and other aspects of the present invention will become clearer and more readily understood through the detailed description following the accompanying drawings. In the drawings:

[0026] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the damper of the present invention;

[0027] Figure 2 A three-dimensional structural schematic diagram of another embodiment of the damper of the present invention;

[0028] Figure 3 for Figure 1 An exploded view of part of the three-dimensional structure of a waterproof motor;

[0029] Figure 4 A schematic diagram of the assembly structure of the rotor, support plate and reduction gear assembly in an embodiment of the damper of the present invention. Detailed Implementation

[0030] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] The specific embodiments / examples described herein are specific implementations of the present invention, used to illustrate the concept of the invention, and are illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of the present invention. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein, all of which are within the protection scope of the present invention.

[0032] The following descriptions of the embodiments are made with reference to the accompanying drawings, illustrating specific embodiments in which the invention can be implemented. Directional terms used in this invention, such as up, down, front, back, left, right, inside, outside, side, etc., are merely directional references to the accompanying drawings. Therefore, the directional terms used are for illustrative and understanding purposes only, and not for limiting the invention.

[0033] Please refer to Figure 1-4 As shown, the present invention provides a damper 100, including: a damper frame 1, an air outlet 2, a baffle plate (not shown), and a waterproof motor 3.

[0034] The air vent 2 is located on one side of the air damper frame 1.

[0035] The wind baffle is supported in the damper frame 1 and is rotatably connected to the damper frame 1.

[0036] The waterproof motor 3 is fixedly installed at one end of the damper frame 1. The waterproof motor 3 is connected to the wind deflector to drive the wind deflector to rotate, so that the wind deflector opens or closes the air vent 2.

[0037] Specifically, support columns extend from opposite ends of the wind deflector, supporting the damper frame 1 on opposite sides and forming a rotatable connection. A waterproof motor 3 is fixed to one end of the outer side of the damper frame 1, with its output shaft connected to a corresponding support column. Its rotation drives the wind deflector to rotate. The wind deflector typically rotates in both directions within a range of less than 90 degrees, thus covering or blocking the air vent 2 to close it, or exposing it to open it, achieving ventilation and controlling the size of the air vent 2 to regulate the airflow. Furthermore, the wind deflector is equipped with an airtight rubber pad. When the wind deflector rotates to cover the air vent 2, the airtight rubber pad abuts against the air vent, providing a better seal and completely closing the air vent 2.

[0038] The waterproof motor 3 includes a motor and a sealing shell that encloses the motor; by fixing the sealing shell to the damper frame 1, the waterproof motor 3 is fixed to the damper frame 1 as a whole, and the motor is sealed and waterproof.

[0039] Specifically, the motor includes a motor body 31, a reduction gear set 32, and a cover 33.

[0040] The motor body 31 includes a housing 311 with a receiving space and open at one end and closed at the other, a stator 312 and a rotor 313 installed within the housing 311, a support plate 314 with a shaft hole (not labeled) fixed within the housing 311 and encapsulating the stator 312 and rotor 313 within the housing 311, and a motor shaft 315 extending from the rotor 313 through the shaft hole. The motor body 31 is a conventional motor structure in the prior art, and the specific structure and principle of its stator 312 and rotor 313 will not be described in detail here. The support plate 314 is spaced apart from both the stator 312 and the rotor 313.

[0041] The reduction gear set 32 ​​includes multiple gear structures, each mounted on the side of the support plate 314 away from the stator 312. Each gear structure is rotatably connected to the support plate 314 and housed within the housing 311, effectively integrating the reduction gear set 32 ​​into the motor body 31, forming a single unit. The gear structures are arranged sequentially around the motor shaft 315. Adjacent gear structures mesh with each other along the direction of their arrangement. This structure cleverly and fully utilizes the outer "disc" space of the motor body 31 centered on the motor shaft 315. By rationally arranging multiple gear structures within this space, rapid and high-precision installation of each gear structure is achieved, improving production efficiency and reducing production costs. Simultaneously, it avoids wasted space, resulting in a smaller overall size for the waterproof motor 3 or the damper 100. The sealing box used for assembling the reduction gear set in the existing technology is eliminated, which reduces the assembly structure, lowers production costs, and further reduces the structural size.

[0042] The cover 33 is placed over the opening of the housing 311 and encapsulates the reduction gear set 32 ​​inside the housing 311. The cover 33 has a through hole 331, through which the output shaft of the reduction gear set 32 ​​passes and forms a sealed rotational connection with the inner circumference of the through hole 331, thereby achieving a first layer of waterproofing for the stator 312, the rotor 313 and the reduction gear set 32.

[0043] Because the sealing shell encloses the motor (the stator 312, the rotor 313, and the reduction gear set 32), and the sealing shell is fixed to the damper frame 1 and seals the motor, and connects the output shaft of the reduction gear set 32 ​​to the baffle plate, a second layer of waterproofing is achieved for the motor through the sealing shell, greatly improving the waterproof performance. Specifically, in this embodiment, the sealing shell includes an upper sealing cover 34, the shape of which is adapted to the housing 311 and fitted onto the housing 311. The open end of the upper sealing cover 34 is fixed to the damper frame 1 by ultrasonic welding to seal the motor. Figure 2 As shown.

[0044] Of course, the structure of the sealing shell is not limited to the above-described structure, and can also be as follows: Figure 1As shown, the sealing shell includes an upper sealing cover 34 and a lower sealing cover 35. The shape of the upper sealing cover is adapted to the housing and is fitted onto the housing. The shape of the upper sealing cover 34 is adapted to the housing 311 and is fitted onto the housing 311. In this embodiment, the upper sealing cover 34 has a cylindrical structure with one end open and the other end closed.

[0045] The lower sealing cover 35 includes a sealing cover body 351 covering the open end of the upper sealing cover 34, a through hole 352 penetrating the sealing cover body 351, and a mounting hole 353 formed on the periphery of the sealing cover body 351. The periphery of the sealing cover body 351 is fixed to the upper sealing cover 34 and forms a seal, realizing a second layer of waterproof structure. The output shaft of the reduction gear set 32 ​​passes through the through hole 352 and forms a sealed rotational connection with the inner periphery of the through hole 352. It is also feasible to fix the sealing shell to the damper frame 1 by screws passing through the mounting hole 353.

[0046] Through the above structural design, the reduction gear set 32 ​​is integrated into the inner support plate 314 of the motor body 31, and together they are housed within the space enclosed by the housing 311 and the cover 33, achieving the first layer of waterproof sealing. Then, by welding and fixing the upper sealing cover 34 to the damper frame 1, a second layer of waterproof sealing is achieved. Alternatively, the lower sealing cover 35 can be fixed to the upper sealing cover 34 to form a seal, thus achieving the second layer of waterproof sealing. This not only achieves an effective waterproof sealing effect for the waterproof motor, making the damper 100 more reliable, but also eliminates the need for an additional sealing box structure for the reduction gear set 32 ​​by integrating it into the support plate 314 within the motor body 31, reducing assembly costs and production costs. The multiple gear structures of the reduction gear set 32, arranged sequentially around the motor shaft 315, fully utilize space, resulting in a smaller overall size of the damper.

[0047] In this embodiment, the reduction gear set 32 ​​includes a first gear structure 321, a second gear structure 322, a third gear structure 323, a fourth gear structure 324, a fifth gear structure 325, a sixth gear structure 326, and an output shaft 327, all housed within the upper sealing cover 34 and meshing sequentially. The axial directions of the first gear structure 321, the second gear structure 322, the third gear structure 323, the fourth gear structure 324, the fifth gear structure 325, the sixth gear structure 326, and the output shaft 327 are all the same as the axial direction of the motor shaft 315.

[0048] The first gear structure 321 includes a first gear 3211 fixed to the motor shaft 315 and coaxially arranged.

[0049] The second gear structure 322, the third gear structure 323, the fourth gear structure 324, the fifth gear structure 325, and the sixth gear structure 326 are arranged around the first gear tooth structure 321, thus cleverly utilizing the outer peripheral "disc" space of the support plate 314 of the motor body 31 with its motor shaft 315 as the center.

[0050] The second gear structure 322 includes a second rotating shaft 3221 supported on the support plate 314 and rotatably connected thereto, and a second lower gear 3222 and a second upper gear 3223 respectively fixed to the second rotating shaft 3221. The second upper gear 3223 is stacked and fixed on the side of the second lower gear 3222 away from the support plate 314 and serves as a synchronous gear. The diameter of the second lower gear 3222 is smaller than the diameter of the second upper gear 3223, and the second lower gear 3222 meshes with the first gear 3211.

[0051] The third gear structure 323 includes a third rotating shaft 3231 supported on the support plate 314 and rotatably connected thereto, and a third lower gear 3232 and a third upper gear 3233 respectively fixed to the third rotating shaft 3231. The third upper gear 3233 is stacked and fixed on the side of the third lower gear 3232 away from the support plate 314 and is a synchronous gear to each other. The diameter of the third lower gear 3232 is smaller than the diameter of the third upper gear 3233. The third upper gear 3233 meshes with the second lower gear 3222.

[0052] The fourth gear structure 324 includes a fourth rotating shaft 3241 supported on the support plate 314 and rotatably connected thereto, and a fourth lower gear 3242 and a fourth upper gear 3243 respectively fixed to the fourth rotating shaft 3241. The fourth upper gear 3243 is stacked and fixed on the side of the fourth lower gear 3242 away from the support plate 314 and is a synchronous gear to each other. The diameter of the fourth lower gear 3242 is larger than the diameter of the fourth upper gear 3243. The fourth lower gear 3242 meshes with the third lower gear 3232.

[0053] The fifth gear structure 325 includes a fifth rotating shaft 3251 supported on the support plate 314 and rotatably connected thereto, and a fifth lower gear 3252 and a fifth upper gear 3253 respectively fixed to the fifth rotating shaft 3251. The fifth upper gear 3253 is stacked and fixed on the side of the fifth lower gear 3252 away from the support plate 314 and is a synchronous gear to each other. The diameter of the fifth lower gear 3252 is larger than the diameter of the fifth upper gear 3253. The fifth lower gear 3252 meshes with the fourth upper gear 3243.

[0054] The sixth gear structure 326 includes a sixth rotating shaft (not shown) supported on the support plate 314 and forming a rotatable connection, and a sixth gear 3262 fixed to the sixth rotating shaft. The sixth gear 3262 meshes with the fifth upper gear 3253, and the output shaft 327 is fixed to the side of the sixth gear 3262 away from the support plate 314.

[0055] The design of the aforementioned multiple gear structures involves first installing the first gear 3211 and the sixth gear structure 326. The installation sequence of the other gear structures, from first to last, is: fifth gear structure 325, fourth gear structure 324, third gear structure 323, and second gear structure 322. This cleverly utilizes the outer circumferential "disc" space of the motor body's support plate 314, centered on its motor shaft 315. This installation sequence also effectively improves installation efficiency and achieves higher precision.

[0056] The six gear structures in the reduction gear set 32 ​​of the present invention are arranged in a parallel four-layer design along the axial direction of the motor shaft 315. One gear structure is designed as a raised gear structure, thereby avoiding the use of other gear structures, making reasonable use of space, and making the reduction gear set 32 ​​more compact and occupying less space. Specifically, in this embodiment, the second gear structure 322 is designed as a raised gear structure. From bottom to top, the fourth lower gear 3242 is the first layer structure, the fourth upper gear 3243 and the fifth lower gear 3252 are the second layer structure, the third upper gear 3233 and the second lower gear 3222 are the third layer structure, and the second upper gear 3223 is the fourth layer structure. The thickness of the other gears can be increased or decreased according to the meshing conditions to make full use of space. From the first gear structure to the sixth gear structure, the meshing transmission sequence is from small-diameter gears to large-diameter gears, therefore the torque of the reduction gear set also increases sequentially.

[0057] To ensure the waterproof motor 3 achieves normal opening and closing speed and torque, its internal reduction gear set 32 ​​ensures that the speed ratio between the output shaft 327 and the motor shaft 315 is between 1:103 and 1:310. Preferably, the reduction gear set 32 ​​ensures a speed ratio of 1:208 between the output shaft 327 and the motor shaft 315. That is, the motor shaft is reduced to 1 / 208 of its original speed through the aforementioned multiple linked gear structures before reaching the output shaft 327, thus driving the baffle of the damper 1. Due to the limited internal space of the waterproof motor 3, the size of the reduction gears formed by each gear structure will be limited to a certain range, within which all are feasible, and the principle remains the same.

[0058] In this embodiment, more preferably, the orthographic projection of each gear structure onto the motor body 31 along the axial direction of the motor body 31 falls entirely within the range of the support plate 314, and the orthographic projection portions of some gear structures overlap. This structural arrangement makes fuller use of the outer peripheral "disc" space of the support plate 314 of the motor body 31, centered on its motor shaft 315.

[0059] Compared with the prior art, the damper of the present invention includes a waterproof motor for driving the baffle to open or close the air vent. The motor comprises a motor body and a reduction gear set, with the reduction gear set integrated within the housing of the motor body. The sealing housing is fixed to the damper frame and seals the motor, and the output shaft of the reduction gear set is connected to the baffle. This structure creates an integral motor structure with the reduction gear set, resulting in better waterproofing, higher damper reliability, and eliminating the need for the sealing box used in the prior art for assembling the reduction gear set, thus reducing assembly structure and production costs. Furthermore, the reduction gear set includes multiple gear structures mounted on support plates within the housing. Each gear structure is rotatably connected to the support plate. The gear structures are arranged sequentially around the motor shaft of the motor body, and adjacent gear structures mesh with each other along the direction of the motor shaft's rotation. Through the structural design of the aforementioned reduction gear set, the outer "disc" space of the motor body centered on its motor shaft is cleverly utilized. By rationally arranging multiple gear structures in this space, the installation of each gear structure is achieved quickly and with high precision, which improves production efficiency and reduces production costs. At the same time, it avoids wasting space and makes the overall structure of the damper smaller.

[0060] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A damper, comprising a damper frame, an air outlet opened on one side of the damper frame, a baffle plate supported in the damper frame and rotatably connected to the damper frame, and a waterproof motor fixed to one end of the damper frame, wherein the waterproof motor is connected to the baffle plate for driving the baffle plate to rotate, causing the baffle plate to open or close the air outlet; characterized in that, The waterproof motor includes a motor and a sealed housing enclosing the motor; the motor includes: The motor body includes a housing with a receiving space and an opening at one end and a closing at the other end, a stator and a rotor installed in the housing, a support plate with a shaft hole fixed in the housing and encapsulating the stator and rotor in the housing, and a motor shaft extending from the rotor through the shaft hole. A reduction gear set, comprising multiple gear structures respectively mounted on the side of the support plate away from the stator, wherein each gear structure is rotatably connected to the support plate and is housed within the housing, and the multiple gear structures are arranged sequentially around the motor shaft; adjacent gear structures mesh with each other along the direction of their arrangement; and... A cover is provided on the open end of the housing and encapsulates the reduction gear set inside the housing. The cover has a through hole, through which the output shaft of the reduction gear set passes and forms a sealed rotatable connection with the inner circumference of the through hole. The sealing shell is fixed to the damper frame and seals the motor, and the output shaft of the reduction gear set is connected to the wind deflector.

2. The damper according to claim 1, characterized in that, The sealing shell includes an upper sealing cover, the shape of which is adapted to the housing and fitted onto the housing. The open end of the upper sealing cover is fixed to the damper frame by ultrasonic welding to seal the motor.

3. The damper according to claim 1, characterized in that, The sealing shell includes an upper sealing cover and a lower sealing cover. The shape of the upper sealing cover is adapted to the housing and is fitted onto the housing. The lower sealing cover includes a sealing cover body covering the open end of the upper sealing cover, a through hole penetrating the sealing cover body, and a mounting hole formed on the periphery of the sealing cover body. The periphery of the sealing cover body is fixed to the upper sealing cover to form a seal. The output shaft of the reduction gear set passes through the through hole and forms a sealed rotatable connection with the inner periphery of the through hole. The sealing shell is fixed to the damper frame by screws passing through the mounting hole.

4. The damper according to claim 1, characterized in that, The reduction gear set includes a first gear structure, a second gear structure, a third gear structure, a fourth gear structure, a fifth gear structure, a sixth gear structure, and the output shaft, all housed within the upper sealing cover and meshing sequentially. The first gear structure includes a first gear fixed to the motor shaft and coaxially arranged; the second gear structure, the third gear structure, the fourth gear structure, the fifth gear structure, and the sixth gear structure are arranged around the first gear structure. The second gear structure includes a second rotating shaft supported on the support plate and forming a rotatable connection, and a second lower gear and a second upper gear respectively fixed to the second rotating shaft. The second upper gear is stacked and fixed on the side of the second lower gear away from the support plate and is a synchronous gear to each other. The diameter of the second lower gear is smaller than the diameter of the second upper gear. The second upper gear meshes with the first gear. The third gear structure includes a third rotating shaft supported on the support plate and forming a rotatable connection, and a third lower gear and a third upper gear respectively fixed to the third rotating shaft. The third upper gear is stacked and fixed on the side of the third lower gear away from the support plate and is a synchronous gear to each other. The diameter of the third lower gear is smaller than the diameter of the third upper gear. The third upper gear meshes with the second lower gear. The fourth gear structure includes a fourth rotating shaft supported on the support plate and forming a rotatable connection, and a fourth lower gear and a fourth upper gear respectively fixed to the fourth rotating shaft. The fourth upper gear is stacked and fixed on the side of the fourth lower gear away from the support plate and is a synchronous gear to each other. The diameter of the fourth lower gear is larger than the diameter of the fourth upper gear, and the fourth lower gear meshes with the third lower gear. The fifth gear structure includes a fifth rotating shaft supported on the support plate and forming a rotatable connection, and a fifth lower gear and a fifth upper gear respectively fixed to the fifth rotating shaft. The fifth upper gear is stacked and fixed on the side of the fifth lower gear away from the support plate and is a synchronous gear to each other. The diameter of the fifth lower gear is larger than the diameter of the fifth upper gear, and the fifth lower gear meshes with the fourth upper gear. The sixth gear structure includes a sixth rotating shaft supported on the support plate and forming a rotatable connection, and a sixth gear fixed to the sixth rotating shaft. The sixth gear meshes with the fifth upper gear, and the output shaft is fixed to the side of the sixth gear away from the support plate.

5. The damper according to claim 1, characterized in that, The orthographic projection of each gear structure onto the motor body along the axial direction of the motor body falls entirely within the range of the support plate, and the orthographic projection portions of some gear structures overlap.

6. The damper according to claim 4, characterized in that, The reduction gear set achieves a speed ratio between the output shaft and the motor shaft ranging from 1:103 to 1:

310.

7. The damper according to claim 6, characterized in that, The reduction gear set achieves a speed ratio of 1:208 between the output shaft and the motor shaft.

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