A grille assembly and fresh air device

Abstract

This utility model provides a grille assembly and a fresh air device. The grille assembly includes multiple blades, a transmission component, and a connector. One end of each blade is hinged to the transmission component via a transmission shaft. The connector is connected to a second rotating shaft and is rotatably arranged around the second rotating shaft. The connector is plate-shaped, and a connecting shaft is integrally formed on one side of the connector. The connecting shaft is snap-fitted to one end of the transmission component, so that the connecting shaft and the transmission component are hinged. The transmission shaft, the second rotating shaft, the connecting shaft, and the first rotating shaft are parallel to each other and spaced apart. Because the plate-shaped connector has a connecting shaft integrally formed on one side, and the connecting shaft is hinged to the transmission component through the snap-fit ​​engagement, the stability of the fit between the connecting shaft and the transmission component is improved, thereby improving the transmission stability of the blades, reducing the occurrence of blade jamming during movement, avoiding the impact on the sealing effect and ventilation efficiency of the air outlet or air inlet, and improving the reliability of the fresh air device operation.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning, and in particular to a grille assembly and a fresh air device. Background Technology

[0002] To prevent dust from entering the room through the fresh air unit duct, the air vents need to be covered when not in use and opened during normal operation. To address this, some existing fresh air unit grille assemblies typically use a drive mechanism to operate a transmission component hinged to the blades, and the elastic force of a spring (such as a spring) returns the blades to their original position, thus controlling the opening and closing of the air vents. However, this structure results in poor transmission stability for the blades, making them prone to jamming during movement. This can even affect the sealing effect and ventilation efficiency of the air vents, reducing the reliability of the fresh air unit. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide a grille assembly and fresh air device that overcomes or at least partially solves the above problems. It can solve the problem of poor transmission stability of the blades, which can easily cause the blades to get stuck during movement, and may even affect the sealing effect and ventilation efficiency of the air outlet. It aims to improve the transmission stability of the blades and thus improve the reliability of the fresh air device.

[0004] Specifically, this utility model provides a grille assembly, including:

[0005] Multiple blades are rotatably disposed at the air outlet about a first axis of rotation for use in shielding or opening the air outlet.

[0006] A transmission component is provided, wherein one end of the blade is hinged to the transmission component via a transmission shaft, so that the transmission component drives multiple blades to rotate synchronously.

[0007] A connector is provided, which is connected to a second rotating shaft and rotatably disposed about the second rotating shaft. The connector is plate-shaped, and a connecting shaft is integrally formed on one side of the connector. The connecting shaft is snap-fitted into one end of the transmission component, so that the connecting shaft and the transmission component are hinged. The transmission shaft, the second rotating shaft, the connecting shaft, and the first rotating shaft are parallel to each other and spaced apart. The distance between the transmission shaft and the first rotating shaft is equal to the distance between the connecting shaft and the second rotating shaft, and the distance between the transmission shaft and the connecting shaft is equal to the distance between the first rotating shaft and the second rotating shaft.

[0008] Optionally, the other end of the connector is provided with a mounting groove penetrating the connector, and the groove wall has a first planar portion. One end of the second rotating shaft also has a corresponding second planar portion. The second rotating shaft is inserted into the mounting groove and fitted into the mounting groove, and the first planar portion of the mounting groove contacts the corresponding second planar portion of the second rotating shaft.

[0009] Optionally, one end of the transmission member is provided with a through hole, and a stop plate is provided on the side of the through hole near the connector. The connecting shaft includes an insertion section fixedly connected to the connector and a stop section located on the side of the insertion section away from the connector, and the stop plate stops at the end of the stop section near the insertion section.

[0010] Optionally, the perforation includes two elongated segments and one circular segment, with the two elongated segments located on opposite sides of the circular segment and extending in the same direction. The width of the elongated segments is smaller than the diameter of the circular segment.

[0011] Optionally, the plane of the drive shaft connected to the same blade and the plane of the first rotating shaft are at an angle of less than 90° with the plane of the corresponding blade.

[0012] The drive shaft is always located on the side of the first rotating shaft away from the air outlet.

[0013] Optionally, the grille assembly further includes a fixing member, which has a sliding groove corresponding to each drive shaft. The drive shaft is slidably connected to the corresponding sliding groove.

[0014] The drive shaft connected to the same blade has a 45° angle between the plane of the first rotating shaft and the plane of the corresponding blade. The slide groove is an arc-shaped groove with a central angle of 90°. The center of the arc of the slide groove is coaxial with the first rotating shaft, and the slide groove is symmetrically arranged along the direction of the air outlet.

[0015] Optionally, the transmission component is provided with a first section, a second section, and a third section sequentially along its length. The first section and the third section are arranged in parallel. The two ends of the second section are respectively connected to one end of the first section and one end of the third section, and the first section is located on the side of the third section closer to the air outlet. The blade is hinged to the first section. The connecting shaft is connected to the third section.

[0016] Optionally, the grille assembly further includes a drive unit for driving the second rotating shaft to rotate. Alternatively,

[0017] The drive device has the second rotating shaft.

[0018] Optionally, when the driving device is used to drive the second rotating shaft to rotate, the driving device includes a motor, the output shaft of which is fixedly connected to the second rotating shaft and coaxially arranged with the second rotating shaft.

[0019] This utility model also provides a fresh air device, including:

[0020] The housing defines an air vent, which is either an air outlet or an air inlet.

[0021] The aforementioned grille assembly.

[0022] In the grille assembly of this utility model, the connecting member rotates around the second rotating shaft under the drive of the second rotating shaft, thereby driving the transmission member hinged to the connecting member via a connecting shaft to move, which in turn causes the blades hinged to the transmission member to rotate around the first rotating shaft. Since the connecting member, which is plate-shaped, has a connecting shaft integrally formed on one side, and the connecting shaft is snap-fitted into one end of the transmission member, the connection between the connecting shaft and the transmission member is improved. This improves the stability of the connection between the connecting shaft and the transmission member, thereby improving the transmission stability of the blades, reducing the occurrence of blade jamming during movement, and preventing the sealing effect and ventilation efficiency of the air outlet or inlet from being affected, thus improving the reliability of the fresh air system.

[0023] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0024] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0025] Figure 1 This is a schematic structural diagram of a grille assembly according to an embodiment of the present utility model;

[0026] Figure 2 This is a schematic exploded view of the connector and transmission component of a grille assembly according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of the connector and transmission component of a grille assembly according to an embodiment of the present utility model;

[0028] Figure 4This is a schematic structural diagram of the blades in a grille assembly according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic structural diagram of a fixing member of a grille assembly according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic structural diagram of a grille assembly according to an embodiment of the present utility model;

[0031] Figure 7 This is a schematic cross-sectional view of a grille assembly according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic cross-sectional partial view of a grille assembly according to an embodiment of the present invention.

[0033] List of reference numerals in the attached diagram:

[0034] 100. Blade; 110. First rotating shaft; 120. Drive shaft;

[0035] 200. Transmission component; 201. First section; 202. Second section; 203. Third section; 210. Through hole; 211. Stop plate; 212. Long hole section; 213. Round hole section;

[0036] 300. Connector; 310. Connecting shaft; 311. Insertion section; 3111. First part; 3112. Second part; 312. Stop section; 320. Mounting groove; 321. First plane part;

[0037] 400. Drive unit; 410. Second rotating shaft; 420. Second planar portion;

[0038] 500. Fastener; 510. Slide rail;

[0039] 600, casing; 610, air vent. Detailed Implementation

[0040] The following reference Figures 1 to 8This description describes a grille assembly and a fresh air device according to embodiments of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0041] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Figure 1 This is a schematic structural diagram of a grille assembly according to an embodiment of the present invention, as shown below. Figure 1 As shown, and refer to Figures 2 to 8 This utility model provides a grid assembly, which includes multiple blades 100, a transmission component 200, and a connector 300.

[0045] The blade 100 is rotatably disposed at the air outlet 610 around the first pivot 110 for shielding or opening the air outlet 610.

[0046] One end of the blade 100 is hinged to the transmission component 200 via the transmission shaft 120, so that the transmission component 200 drives multiple blades 100 to rotate synchronously.

[0047] The connecting member 300 is connected to the second rotating shaft 410 and is rotatably arranged around the second rotating shaft 410. The connecting member 300 is plate-shaped, and a connecting shaft 310 is integrally formed on one side of the connecting member 300. The connecting shaft 310 is snapped into one end of the transmission member 200 so that the connecting shaft 310 and the transmission member 200 are hinged. The transmission shaft 120, the second rotating shaft 410, the connecting shaft 310 and the first rotating shaft 110 are parallel to each other and spaced apart. The distance between the transmission shaft 120 and the first rotating shaft 110 is equal to the distance between the connecting shaft 310 and the second rotating shaft 410, and the distance between the transmission shaft 120 and the connecting shaft 310 is equal to the distance between the first rotating shaft 110 and the second rotating shaft 410, so that the transmission shaft 120, the first rotating shaft 110, the second rotating shaft 410 and the connecting shaft 310 cooperate to form a parallelogram mechanism.

[0048] In this embodiment, when the vent 610 is not in use, the blades 100 are shielded to prevent dust from entering the room through the vent 610. When the vent 610 is needed, the blades 100 rotate to avoid the vent 610, allowing airflow to pass smoothly through the vent 610. Furthermore, driven by the second rotating shaft 410, the connecting member 300 rotates around the second rotating shaft 410, thereby driving the transmission member 200, which is hinged to the connecting member 300 via the connecting shaft 310, to move, which in turn causes the blades 100, which are hinged to the transmission member 200, to rotate around the first rotating shaft 110. In this design, a connecting shaft 310 is integrally formed on one side of the plate-shaped connector 300, and the connecting shaft 310 is snapped into one end of the transmission component 200. This allows the connecting shaft 310 to be hinged to the transmission component 200 through the snap-fit ​​engagement, thereby improving the stability of the fit between the connecting shaft 310 and the transmission component 200. This, in turn, improves the transmission stability of the blade 100, reduces the occurrence of jamming during the movement of the blade 100, avoids affecting the sealing effect and ventilation efficiency of the air outlet 610, and improves the reliability of the fresh air device operation.

[0049] In some embodiments of this utility model, such as Figure 2 and Figure 8As shown, the other end of the connector 300 is provided with a mounting groove 320 that penetrates the connector 300, and the groove wall of the mounting groove 320 has a first flat portion 321. One end of the second rotating shaft 410 also has a corresponding second flat portion 420. The second rotating shaft 410 is inserted into the mounting groove 320 and is fitted into the mounting groove 320, and the first flat portion 321 of the mounting groove 320 is in contact with the corresponding second flat portion 420 of the second rotating shaft 410.

[0050] In this embodiment, the first planar portion 321 of the mounting groove 320 contacts the corresponding second planar portion 420 of the second rotating shaft 410 to block each other, thereby allowing the mounting groove 320 to rotate synchronously with the second rotating shaft 410. The structure of keeping the mounting groove 320 and the second rotating shaft 410 relatively stationary through the contact of the two planes is simple, easy to manufacture, and has a low cost. In addition, the contact of the two planes also ensures the stability of the transmission between the mounting groove 320 and the second rotating shaft 410.

[0051] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, one end of the transmission member 200 is provided with a through hole 210, and a stop plate 211 is provided on the side of the through hole 210 near the connector 300. The connecting shaft 310 includes an insertion section 311 fixedly connected to the connector 300 and a stop section 312 located on the side of the insertion section 311 away from the connector 300. The stop plate 211 stops at the end of the stop section 312 near the insertion section 311.

[0052] In this embodiment, the connecting shaft 310 is inserted into the through hole 210 of the transmission member 200. Through the cooperation of the stop plate 211, the insertion section 311, and the connecting member 300, the transmission member 200 and the connecting member 300 are hinged. This allows the connecting member 300 to rotate around the second rotating shaft 410, thereby driving the transmission member 200 to move. The structure of the connecting shaft 310 and the connecting member 300 being integrally formed and connected to the transmission member 200 via an insertion method not only simplifies the assembly of the grid assembly and reduces assembly time, but also simplifies the mating structure of the connecting shaft 310 and the connecting member 300, facilitating manufacturing.

[0053] In some embodiments of this utility model, the insertion segment 311 includes a first portion 3111 and a second portion 3112. The second portion 3112 is connected to the side of the first portion 3111 near the connector 300 and is fixedly connected to the connector 300. The stop plate 211 is stopped between the second portion 3112 and the stop segment 312 to limit the relative movement between the transmission member 200 and the connector 300 in the axial direction of the second rotating shaft 410.

[0054] In this embodiment, the second part 3112 stops on the side of the transmission member 200 near the connector 300 to avoid the contact surface between the connector 300 and the transmission member 200 being too large, thereby reducing the frictional force experienced by the connector 300 and the transmission member 200 when they rotate relative to each other. This not only reduces the noise generated by friction, but also reduces the energy consumption when the connector 300 and the transmission member 200 rotate relative to each other.

[0055] In some embodiments of this utility model, such as Figure 2 As shown, the perforation 210 includes two elongated segments 212 and one circular segment 213. The two elongated segments 212 are located on opposite sides of the circular segment 213, and the two elongated segments 212 extend in the same direction. The width of the elongated segments 212 is smaller than the diameter of the circular segment 213.

[0056] Furthermore, the transmission component 200 is made of a flexible material with a certain degree of elasticity, preferably ABS or polypropylene.

[0057] In this embodiment, the two elongated hole segments 212 are provided so that when the connecting shaft 310 is inserted into the through hole 210, the through hole 210 can undergo slight deformation, so that the connecting shaft 310 can be inserted into the through hole 210.

[0058] In some embodiments of this utility model, such as Figure 3 As shown, the end of the stop section 312 away from the connector 300 is tapered.

[0059] In this embodiment, the stop section 312 is tapered. When the connecting shaft 310 is inserted into the through hole 210, the small end of the stop section 312 is inserted into the through hole 210 first, so as to facilitate insertion into the through hole 210.

[0060] In some embodiments of this utility model, such as Figure 7 As shown, there is an angle of less than 90° between the plane of the drive shaft 120 connected to the same blade 100 and the plane of the first rotating shaft 110 and the plane of the corresponding blade 100. The drive shaft 120 is always on the side of the first rotating shaft 110 away from the air outlet 610.

[0061] In this embodiment, the drive shaft 120 is always located on the side of the first shaft 110 away from the air vent 610 during rotation, which avoids the transmission component 200 protruding from the air vent 610 and interfering with items outside the air vent 610, and also avoids collisions between the transmission component 200 and users or items outside the air vent 610, thus improving safety.

[0062] In some embodiments of this utility model, such as Figure 5 and Figure 7As shown, the grille assembly also includes a fixing member 500, which has a sliding groove 510 corresponding to the drive shaft 120. The drive shaft 120 is slidably connected to the corresponding sliding groove 510.

[0063] The plane containing the drive shaft 120 connected to the same blade 100 and the first rotating shaft 110 has a 45° angle with the plane containing the corresponding blade 100. The slide groove 510 is an arc-shaped groove with a central angle of 90°. The center of the arc of the slide groove 510 is coaxial with the first rotating shaft 110, and the slide groove 510 is symmetrically arranged in a direction perpendicular to the air outlet 610.

[0064] In this embodiment, the slide groove 510 is arc-shaped with a central angle of 90°, allowing the blade 100 to rotate 90 degrees. For example, when the vent 610 needs to be blocked, the blade 100 is positioned vertically to block the vent 610, which faces forward and backward. When the vent 610 needs to be opened, the blade 100 is positioned forward and backward to minimize interference with the airflow and improve airflow efficiency. In other words, the arc-shaped slide groove 510 with a central angle of 90°, and the drive shaft 120 slidably connected inside the slide groove 510, not only provides support and guidance for the drive shaft 120 to ensure the rotational stability of the blade 100, but also restricts the movement of the drive shaft 120 so that the blade 100 cannot rotate excessively when it reaches the open or blocked position. The angle between the plane of the drive shaft 120 connected to the same blade 100 and the plane of the first rotating shaft 110 and the plane of the corresponding blade 100 is set to 45°, so that the slide groove 510 is symmetrically arranged along the opening direction of the air outlet 610, thereby improving the structural strength of the fixing member 500.

[0065] In some embodiments of this utility model, such as Figure 7 As shown, the transmission component 200 is provided with a first section 201, a second section 202, and a third section 203 sequentially along its length. The first section 201 and the third section 203 are arranged in parallel. The two ends of the second section 202 are respectively connected to one end of the first section 201 and one end of the third section 203, and the first section 201 is located on the side of the third section 203 closer to the air outlet 610. The blade 100 is hinged to the first section 201. The connecting shaft 310 is connected to the third section 203.

[0066] In this embodiment, the first section 201 of the transmission component 200 is located on the side of the third section 203 closer to the air outlet 610, making the blade 100 closer to the air outlet 610. This not only avoids the blade 100 being too large to shield the air outlet 610, reducing material usage during blade manufacturing, but also saves space inside the air outlet 610, facilitating the placement of other devices and making the interior of the fresh air system more compact, thus improving the space utilization rate of the fresh air system. Positioning the third section 203 on the side of the first section 201 away from the air outlet 610 and connecting it to the drive device 400 also avoids the drive device 400 being placed too close to the air outlet 610, which could affect airflow. In summary, the design of the transmission component 200 in this embodiment ensures smooth airflow at the air outlet 610 while reducing material usage during blade manufacturing and saving space inside the air outlet 610.

[0067] In some embodiments of the present invention, the grille assembly further includes a drive device 400, which is used to drive the second rotating shaft 410 to rotate.

[0068] In this embodiment, the drive device 400 is mechanically coupled to the second rotating shaft 410 as an independent component, and transmits torque through a structure such as a coupling or gear set, which facilitates independent maintenance or replacement after the drive device 400 or the second rotating shaft 410 fails.

[0069] In some embodiments of this utility model, when the driving device 400 is used to drive the second rotating shaft 410 to rotate, the driving device 400 includes a motor, the output shaft of which is fixedly connected to the second rotating shaft 410 and coaxially arranged with the second rotating shaft 410.

[0070] In some embodiments of this utility model, the drive device 400 has a second rotating shaft 410.

[0071] In this embodiment, the rotor of the drive device 400 can be integrated with the second rotating shaft 410 into the same structure, eliminating the need for couplings and other structures. This makes the structure of the drive device 400 more compact and reduces the space occupied by the drive device 400.

[0072] This utility model provides a fresh air device, including a housing 600 and a grille assembly as described in any of the above embodiments.

[0073] The housing 600 is defined with an air vent 610, which is either an air outlet 610 or an air inlet 610.

[0074] In this embodiment, driven by the second rotating shaft 410, the connecting member 300 rotates around the second rotating shaft 410, thereby driving the transmission member 200, which is hinged to the connecting member 300 via the connecting shaft 310, to move. This, in turn, causes the blade 100, which is hinged to the transmission member 200, to rotate around the first rotating shaft 110. Since the connecting shaft 310 is integrally formed on one side of the plate-shaped connecting member 300, and the connecting shaft 310 is snap-fitted into one end of the transmission member 200, the connection between the connecting shaft 310 and the transmission member 200 is improved. This improves the stability of the connection between the connecting shaft 310 and the transmission member 200, thereby improving the transmission stability of the blade 100, reducing the occurrence of jamming during movement of the blade 100, and preventing the sealing effect and ventilation efficiency of the air outlet 610 or air inlet 610 from being affected. This improves the reliability of the fresh air system.

[0075] In some embodiments of this utility model, the fixing member 500 is fixed to the housing 600 and is located on one side of the air vent 610.

[0076] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A grid assembly, characterized in that, include: Multiple blades are rotatably disposed at the air outlet about a first axis of rotation for use in shielding or opening the air outlet; A transmission component, wherein one end of the blade is hinged to the transmission component via a transmission shaft, so that the transmission component drives multiple blades to rotate synchronously; A connector is attached to a second rotating shaft and rotatably disposed around the second rotating shaft. The connector is plate-shaped, and a connecting shaft is integrally formed on one side of the connector. The connecting shaft is snapped into one end of the transmission component to make the connecting shaft hinged to the transmission component. The transmission shaft, the second rotating shaft, the connecting shaft, and the first rotating shaft are parallel to each other and spaced apart. The distance between the transmission shaft and the first rotating shaft is equal to the distance between the connecting shaft and the second rotating shaft, and the distance between the transmission shaft and the connecting shaft is equal to the distance between the first rotating shaft and the second rotating shaft.

2. The grille assembly according to claim 1, characterized in that, The other end of the connector is provided with a mounting groove that penetrates the connector. The groove wall of the mounting groove has a first flat portion. One end of the second rotating shaft also has a corresponding second flat portion. The second rotating shaft is inserted into the mounting groove and fitted into the mounting groove. The first flat portion of the mounting groove is in contact with the second flat portion corresponding to the second rotating shaft.

3. The grille assembly according to claim 1, characterized in that, One end of the transmission component is provided with a through hole, and a stop plate is provided on the side of the through hole near the connector; the connecting shaft includes an insertion section fixedly connected to the connector and a stop section located on the side of the insertion section away from the connector, and the stop plate stops at the end of the stop section near the insertion section.

4. The grille assembly according to claim 3, characterized in that, The insertion section includes a first part and a second part, the second part being connected to the side of the first part near the connector and fixedly connected to the connector; a stop plate is stopped between the second part and the stop section.

5. The grille assembly according to claim 3, characterized in that, The perforation includes two elongated segments and one circular segment. The two elongated segments are located on opposite sides of the circular segment and extend in the same direction. The width of the elongated segments is smaller than the diameter of the circular segment.

6. The grille assembly according to claim 1, characterized in that, The drive shaft connected to the same blade has an angle of less than 90° between the plane of the first rotating shaft and the plane of the corresponding blade, and the drive shaft is always located on the side of the first rotating shaft away from the air outlet.

7. The grille assembly according to claim 6, characterized in that, The grille assembly also includes a fixing member, which is provided with a sliding groove corresponding to the drive shaft; the drive shaft is slidably connected to the corresponding sliding groove. The drive shaft connected to the same blade has a 45° angle between the plane of the first rotating shaft and the plane of the corresponding blade; the slide groove is an arc-shaped groove with a central angle of 90°, the center of the arc of the slide groove is coaxial with the first rotating shaft, and the slide groove is symmetrically arranged along the direction of the air outlet.

8. The grille assembly according to claim 1, characterized in that, The transmission component is provided with a first section, a second section and a third section in sequence along its length; the first section and the third section are arranged in parallel; the two ends of the second section are respectively connected to one end of the first section and one end of the third section, and the first section is located on the side of the third section closer to the air outlet; the blade is hinged to the first section; the connecting shaft is connected to the third section.

9. The grille assembly according to claim 1, characterized in that, The grille assembly further includes a drive device for driving the second rotating shaft to rotate; or... The drive device has the second rotating shaft.

10. A fresh air device, characterized in that, include: A housing, wherein the housing defines an air vent, the air vent being an air outlet or an air inlet; The grille assembly as described in any one of claims 1 to 9.

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