Fresh air device and air conditioner with fresh air device

Abstract

The application provides a fresh air device and an air conditioner with the fresh air device, and belongs to the technical field of household appliances. The fresh air device comprises a shell and a centrifugal fan. The shell is internally provided with a centrifugal air duct. The centrifugal air duct is provided with an air inlet and an air outlet. The shell is provided with a first baffle, a second baffle and a first driving assembly. The first baffle and the second baffle are arranged at the air inlet. The first baffle is provided with a plurality of first through holes. The second baffle is provided with a plurality of second through holes. The first driving assembly can drive at least one of the first baffle and the second baffle to move relative to the other, so as to gradually increase the air inlet amount of the air inlet by sequentially changing from a fully blocked state, a partially overlapped state to a fully overlapped state through the first through holes and the second through holes. The first baffle and the second baffle can block mosquitoes and insects outside the room, and the air inlet amount of the air inlet can be adjusted by changing the relative position of the first baffle and the second baffle, so as to reduce the noise during the operation of the fresh air device and improve the user experience.

Description

Technical Field

[0001] This application belongs to the technical field of household appliances, specifically relating to a fresh air device and an air conditioner having a fresh air device. Background Technology

[0002] When using an air conditioner to cool or heat the indoor environment, it is necessary to close doors and windows to create a closed environment to ensure the heat exchange effect of the air conditioner. However, the indoor air quality will deteriorate over time, and users will experience discomfort after being in a closed room for a long time.

[0003] Therefore, more and more air conditioners are equipped with fresh air devices. These devices are usually installed on the indoor unit of the air conditioner and have pipes that connect to the outside. During the operation of the indoor unit, the fresh air device can introduce fresh air from the outside into the room and expel polluted air from the room, which can both ensure the heat exchange effect of the indoor unit and improve the indoor air quality.

[0004] However, outdoor mosquitoes can easily enter the room through the air intake duct of the fresh air system, and the fresh air system can also generate noise when the air intake volume is large, resulting in a poor user experience. Summary of the Invention

[0005] This application provides a fresh air device and an air conditioner with a fresh air device to solve the problems that outdoor mosquitoes can easily enter the room through the fresh air device, and that the fresh air device can easily generate noise when the air volume is large.

[0006] In a first aspect, the fresh air device provided in this application includes a housing and a centrifugal fan. The housing is provided with a centrifugal air duct, which has an air inlet and an air outlet. The centrifugal fan is rotatably disposed within the centrifugal air duct. The housing is provided with a first baffle, a second baffle, and a first drive assembly. The first baffle and the second baffle are sequentially disposed from the outside to the inside at the air inlet. The first baffle is provided with a plurality of first through holes, and the second baffle is provided with a plurality of second through holes. At least one of the first baffle and the second baffle is connected to the first drive assembly. The first drive assembly drives at least one of the first baffle and the second baffle to move relative to the other, so as to gradually increase the air intake of the air inlet by passing through the first through holes and the second through holes sequentially from a completely blocked state, a partially overlapping state, and finally a completely overlapping state.

[0007] Those skilled in the art will understand that when the fresh air system is in operation, the centrifugal fan draws outdoor air into the centrifugal duct through the air inlet and then discharges it into the room through the air outlet. The first and second baffles can block outdoor insects and other foreign objects, preventing them from entering the room through the fresh air system. Simultaneously, the first driving component can change the relative positions of the first and second baffles, adjusting the communication area of ​​the first and second through holes to regulate the air intake volume. This allows for appropriate adjustment of the air intake volume when the fresh air system generates noise, reducing operating noise and improving the user experience.

[0008] In some embodiments, the first baffle is rotatably embedded in the air inlet and connected to the first drive assembly.

[0009] In some embodiments, the housing is further provided with a second drive assembly, the second baffle is movably connected to the housing and connected to the second drive assembly, and the second drive assembly can drive the second baffle to move to one side of the air inlet.

[0010] In some embodiments, the housing is further provided with a third baffle and a third drive assembly. The third baffle is movably connected to the housing and connected to the third drive assembly. The third drive assembly can drive the third baffle to close the air inlet.

[0011] In some embodiments, both the second baffle and the third baffle are located within the centrifugal duct, with the third baffle located on the side of the second baffle opposite to the first baffle.

[0012] In some embodiments, the inner wall of the housing is provided with a track, on which a first groove and a second groove are provided that are parallel to each other, a second baffle is slidably embedded in the first groove, and a third baffle is slidably embedded in the second groove.

[0013] In some embodiments, the first drive assembly includes: a gear ring surrounding the periphery of the first baffle; and a drive motor mounted on the housing, wherein a gear is provided on the output shaft of the drive motor and the gear meshes with the gear ring.

[0014] In some embodiments, the gear ring is a straight bevel gear ring, and the axis of the gear is perpendicular to the axis of the gear ring.

[0015] In some embodiments, the housing is provided with a retaining ring, which is arranged around the periphery of the air inlet, the gear ring is rotatably embedded in the retaining ring, the drive motor is located outside the retaining ring, and the retaining ring is provided with a notch to avoid the gear and part of the output shaft.

[0016] On the other hand, the air conditioner provided in this application includes an indoor unit and an outdoor unit, wherein the indoor unit is equipped with a fresh air device as described in any of the above embodiments.

[0017] Those skilled in the art will understand that the fresh air system can operate independently or in conjunction with an indoor air conditioning unit. By operating the fresh air system, outdoor air can be introduced into the room, improving indoor air quality. Furthermore, the first and second baffles installed at the air inlet can prevent outdoor insects from entering the room. The relative positions of the first and second baffles can also change the connection area between the first and second through holes, thereby adjusting the airflow at the air inlet, reducing noise during operation, and improving the user experience. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 This is a schematic diagram of the structure of the fresh air device in the embodiments of this application;

[0020] Figure 2 This is a cross-sectional view of the fresh air device in the embodiments of this application;

[0021] Figure 3 yes Figure 2 Enlarged view of section A;

[0022] Figure 4 The positional relationship between the first baffle and the second baffle in the embodiments of this application. Figure 1 ;

[0023] Figure 5 The positional relationship between the first baffle and the second baffle in the embodiments of this application. Figure 2 ;

[0024] Figure 6 The positional relationship between the first baffle and the second baffle in the embodiments of this application. Figure 3 ;

[0025] Figure 7 This is a cross-section of the fresh air device in the embodiments of this application. Figure 1 ;

[0026] Figure 8This is a cross-section of the fresh air device in the embodiments of this application. Figure 2 ;

[0027] Figure 9 This is a schematic diagram of the structure of the indoor unit of the air conditioner in the embodiment of this application.

[0028] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Outer shell;

[0031] 11-Centrifugal air duct;

[0032] 12 - Air inlet;

[0033] 13 - Air outlet;

[0034] 20-Centrifugal fan;

[0035] 30 - First baffle;

[0036] 31 - First through hole;

[0037] 40 - Second baffle;

[0038] 41 - Second through hole;

[0039] 50 - First drive component;

[0040] 51-Toothed Ring;

[0041] 52 - Drive motor;

[0042] 53-Gear;

[0043] 60 - Third baffle;

[0044] 70-track;

[0045] 71-First chute;

[0046] 72 - Second chute;

[0047] 80-Retaining ring;

[0048] 81- Gap;

[0049] 90 - Internal components. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0052] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.

[0053] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0054] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0055] In existing technology, indoor air conditioners typically include a fresh air system with a duct connected to the outside air. During operation, this system draws in fresh outdoor air, allowing the indoor unit to operate within a closed environment while simultaneously exchanging indoor air and ensuring air quality. However, outdoor insects like mosquitoes and rodents can easily enter the fresh air system through the intake duct and then exit through the outlet. Furthermore, a large intake volume can generate significant noise, resulting in a poor user experience.

[0056] Based on this, this application provides a fresh air device, and the embodiments of the present invention are described below with reference to the accompanying drawings.

[0057] Figure 1 This is a schematic diagram of the structure of the fresh air device in the embodiments of this application; Figure 2 This is a cross-sectional view of the fresh air device in the embodiments of this application; Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0058] Combination Figures 1-3 As shown, the fresh air unit includes a housing 10 and a centrifugal fan 20. A centrifugal duct 11 is provided inside the housing 10, and the centrifugal duct 11 has an air inlet 12 and an air outlet 13. The centrifugal fan 20 is rotatably mounted inside the centrifugal duct 11. The shapes of the air outlet 13 and the air inlet 12 can be adapted to actual needs; for example, both the air outlet 13 and the air inlet 12 can be circular. In normal use, the fresh air unit is installed on an air conditioner, along with the indoor unit. An air inlet duct needs to be connected to the air inlet 12, extending to the outside to communicate with outdoor air. The rotation of the centrifugal fan 20 draws outside air into the centrifugal duct 11 through the air inlet 12, and then exhausts it into the room through the air outlet 13. Furthermore, a filter or sterilization lamp (not shown in the figure) or other purification components can be installed inside the centrifugal duct 11 to filter and sterilize the air before it enters the room, further improving air quality.

[0059] The outer casing 10 is provided with a first baffle 30, a second baffle 40 and a first drive assembly 50. The first baffle 30 and the second baffle 40 are arranged sequentially from the outside to the inside at the air inlet 12. The first baffle 30 is provided with a plurality of first through holes 31 and the second baffle 40 is provided with a plurality of second through holes 41. The shapes of the first baffle 30 and the second baffle 40 are adapted to the shape of the air inlet 12. The specific number, shape, size and distribution of the first through holes 31 and the second through holes 41 can be adapted according to the specific structure and size of the first baffle 30 and the second baffle 40. For example, the first through holes 31 and the second through holes 41 are both rectangular and evenly distributed. At least one of the first baffle 30 and the second baffle 40 is connected to the first drive assembly 50. The first drive assembly 50 drives at least one of the first baffle 30 and the second baffle 40 to move relative to the other, so as to gradually increase the air intake volume of the air inlet 12 by passing through the first through hole 31 and the second through hole 41 from a fully blocked state, a partially overlapping state and finally a fully overlapping state.

[0060] By setting the first baffle 30 and the second baffle 40 at the air inlet 12, on the one hand, foreign objects can be blocked, preventing outdoor insects or rats from entering the centrifugal air duct 11 through the air inlet 12; on the other hand, by changing the relative position of the first baffle 30 and the second baffle 40, the connecting area of ​​the first through hole 31 and the second through hole 41 can be adjusted to regulate the air intake at the air inlet 12. This allows for adjustment of the air intake at the air inlet 12 when noise occurs in the fresh air device, thereby reducing noise and improving the user experience.

[0061] It is understandable that the first baffle 30 and the second baffle 40 can be relatively translated or relatively rotated. Furthermore, the relative movement of the first baffle 30 and the second baffle 40 can be such that the second baffle 40 is relatively fixed to the outer casing 10 while the first baffle 30 moves relative to the outer casing 10; or the first baffle 30 is relatively fixed to the outer casing 10 while the second baffle 40 moves relative to the outer casing 10; or both the first baffle 30 and the second baffle 40 can move relative to the outer casing 10. This can be adapted to the specific installation method of the first baffle 30 and the second baffle 40 on the outer casing 10.

[0062] For example, such as Figure 1 As shown, the first baffle 30 can be circular and rotatably embedded in the circular air inlet 12. The first baffle 30 is connected to the first drive assembly 50. By driving the first baffle 30 to rotate through the first drive assembly 50, the communication area between each first through hole 31 and each second through hole 41 is adjusted, thereby achieving the purpose of adjusting the air intake volume.

[0063] Figure 4 The positional relationship between the first baffle and the second baffle in the embodiments of this application. Figure 1; Figure 5 The positional relationship between the first baffle and the second baffle in the embodiments of this application. Figure 2 ; Figure 6 The positional relationship between the first baffle and the second baffle in the embodiments of this application. Figure 3 .

[0064] Specifically, when the first baffle 30 is in Figure 4 When the position shown is such that the first through hole 31 is completely blocked by the second baffle 40, and the second through hole 41 is completely blocked by the first baffle 30, the air inlet 12 is closed; when the first baffle 30 is based on Figure 4 Rotating the position shown clockwise will gradually increase the communication area between the first through hole 31 and the second through hole 41 (e.g., Figure 5 As shown), the air intake at air inlet 12 also gradually increases; when the first baffle 30 is based on Figure 4 When the position shown is rotated 90° clockwise, the positions of each first through hole 31 and each second through hole 41 coincide, and the air intake at the air inlet 12 is at its maximum.

[0065] Figure 7 This is a cross-section of the fresh air device in the embodiments of this application. Figure 1 .

[0066] Combination Figure 7 As shown, in some embodiments, a second driving assembly may also be provided on the outer casing 10, and a second baffle 40 is also movably connected to the outer casing 10. The second baffle 40 is connected to the second driving assembly, and the second driving assembly can drive the second baffle 40 to move to one side of the air inlet 12. In this way, only the first baffle 30 exists at the air outlet 13. In any position, all the first through holes 31 on the first baffle 30 are fully exposed, maximizing the air intake at the air inlet 12.

[0067] Therefore, during actual use, the air intake at the air inlet 12 can be adjusted to the maximum state at any time by controlling the movement of the second baffle 40 driven by the second drive component. Furthermore, when the second baffle 40 is moved back to the air inlet 12 by the second drive component, the relative position of the first baffle 30 and the second baffle 40 is restored to the state before the second baffle 40 moved, so that the air intake continues to be maintained at the size before the second baffle 40 moved.

[0068] Figure 8 This is a cross-section of the fresh air device in the embodiments of this application. Figure 2 .

[0069] Combination Figure 2 and Figure 8As shown, in some embodiments, the housing 10 may also be provided with a third baffle 60 and a third drive assembly. The third baffle 60 is movably connected to the housing 10 and connected to the third drive assembly. The shape of the third baffle 60 is adapted to the shape of the air inlet 12. The third drive assembly can drive the third baffle 60 to close the air inlet 12.

[0070] The third drive assembly moves the third baffle 60. When the fresh air system is shut down or the entire indoor unit of the air conditioner is turned off, the third drive assembly can directly move the third baffle 60 to the air inlet 12, sealing the air inlet 12 and preventing outdoor air from entering the room through the fresh air system. Furthermore, when the third baffle 60 closes the air inlet 12, the relative positions of the first baffle 30 and the second baffle 40 remain unchanged. Therefore, when the fresh air system restarts, after the third baffle 60 resets and the air inlet 12 reopens, the relative positions of the first baffle 30 and the second baffle 40 remain in the state before shutdown, allowing the system to continue operating with the air intake volume before shutdown.

[0071] It is worth mentioning that in this embodiment, the relative positions of the first baffle 30, the second baffle 40 and the third baffle 60 are not specifically limited. For example, the first baffle 30 is rotatably embedded in the air inlet 12, the second baffle 40 and the third baffle 60 are both arranged in the centrifugal air duct 11, and the third baffle 60 is located on the side of the second baffle 40 away from the first baffle 30.

[0072] Furthermore, the movement of the second baffle 40 and the third baffle 60 on the housing 10 can be arbitrary. For example, in combination with... Figure 3 , Figure 6 and Figure 7 As shown, the housing 10 may be provided with a track 70. Two tracks 70 may be provided and symmetrically distributed on both sides of the air inlet 12. The second baffle 40 and the third baffle 60 may be provided between the two tracks 70. The track 70 is provided with a first sliding groove 71 and a second sliding groove 72 that are parallel to each other. The second baffle 40 is slidably embedded in the first sliding groove 71, and the third baffle 60 is slidably embedded in the second sliding groove 72. The second drive assembly drives the second baffle 40 to slide in the first sliding groove, and the third drive assembly drives the third baffle 60 to slide in the second sliding groove 72.

[0073] In this embodiment, the specific structure of the first driving component 50 is not limited, as long as it can drive the rotation of the first baffle 30.

[0074] For example, such as Figure 1As shown, the first drive assembly 50 may include a gear ring 51 and a drive motor 52. The gear ring 51 is arranged around the periphery of the first baffle 30. The gear ring 51 and the first baffle 30 may be integrally formed, or they may be separately processed and then connected together by means of bonding, welding or snap-fitting. The drive motor 52 is fixed on the housing 10. A gear 53 is provided on the output shaft of the drive motor 52. The gear 53 meshes with the gear ring 51, so that the drive motor 52 can drive the gear 53 to rotate, and the gear 53 drives the gear ring 51 to rotate, thereby achieving the purpose of controlling the rotation of the first baffle 30.

[0075] Among them, the toothed ring 51 can be a straight bevel toothed ring 51, and the axis of the gear 53 is set perpendicular to the axis of the toothed ring 51, so that the drive motor 52 can be vertically fixed on one side of the first baffle 30, making the position layout of the drive motor 52 more compact.

[0076] Furthermore, the housing 10 may also be provided with a retaining ring 80, which is arranged around the air inlet 12. The toothed ring 51 is rotatably embedded in the retaining ring 80 so that the retaining ring 80 can protect the movement of the toothed ring 51. The drive motor 52 is installed on the outside of the retaining ring 80. The retaining ring 80 is provided with a clearance gear 53 and a notch 81 for part of the output shaft so that the gear 53 and the toothed ring 51 can mesh.

[0077] In addition, the second and third driving components mentioned above are not specifically limited in this embodiment, as long as they can drive the second baffle 40 and the third baffle 60 to slide. For example, the second and third driving components can be driven to slide by a magnetic control device or a lead screw structure.

[0078] In summary, the fresh air device provided in this embodiment, through the first baffle 30 and the second baffle 40 set at the air inlet 12, can block external mosquitoes from entering the centrifugal air duct 11, thereby preventing mosquitoes from entering the room through the fresh air device. Furthermore, by rotating the first baffle 30, the connecting area of ​​the first through hole 31 and the second through hole 41 changes, thereby adjusting the air intake at the air inlet 12 and reducing the noise during operation of the fresh air device. When the fresh air device is turned off, the air inlet 12 can also be sealed by the third baffle 60 to prevent outdoor air from entering the room through the fresh air device, improving the user experience.

[0079] Based on the fresh air device described above, this application embodiment also provides an air conditioner, which includes an indoor unit and an outdoor unit. The indoor unit can be either floor-standing or wall-mounted, and is equipped with the fresh air device described above.

[0080] Figure 9 This is a schematic diagram of the structure of the indoor unit of the air conditioner in the embodiment of this application.

[0081] Specifically, such as Figure 9 As shown, the indoor unit of the air conditioner may include a casing (not shown) and an internal component 90, with the internal component 90 installed inside the casing. A fresh air device may be installed inside the casing and connected to one side of the internal component 90. An air inlet 12 may be located on the back of the casing 10, and the back of the casing also needs to have an air intake channel communicating with the air inlet 12. An air outlet 13 may be located on the side of the casing 10 away from the internal component 90, and the side of the casing also needs to have an air outlet channel communicating with the air outlet 13.

[0082] Of course, the fresh air device can also be installed directly on the outside of the casing. It can be adapted to the specific structure of the indoor unit of the air conditioner. No specific restrictions are imposed in this embodiment.

[0083] Understandably, the fresh air unit can operate independently or simultaneously with the indoor air conditioning unit. In actual use, an air intake duct needs to be connected to the air inlet 12, extending to the outside to connect with outdoor air. When the fresh air unit is working normally, the rotation of the centrifugal fan 20 draws outdoor air into the centrifugal duct 11 through the air intake duct, and then exhausts it into the room through the air outlet 13, providing fresh air to the enclosed room and improving indoor air quality.

[0084] The first baffle 30 and the second baffle 40 installed at the air inlet 12 in the fresh air device can block outdoor mosquitoes from entering the centrifugal air duct 11, thereby preventing outdoor mosquitoes from entering the room through the fresh air device. Furthermore, the first drive assembly 50 drives the relative position of the first baffle 30 and the second baffle 40, adjusting the communication area of ​​the first through hole 31 and the second through hole 41 to regulate the air intake at the air inlet 12, reducing noise generated during operation of the fresh air device and improving the user experience.

[0085] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0086] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the technical solutions disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0087] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fresh air device for use in an air conditioner, characterized in that, The fresh air device includes a housing and a centrifugal fan. The housing is provided with a centrifugal air duct, which has an air inlet and an air outlet. The centrifugal fan is rotatably disposed within the centrifugal air duct. The outer casing is provided with a first baffle, a second baffle and a first drive assembly. The first baffle and the second baffle are arranged sequentially from the outside to the inside at the air inlet. The shapes of the first baffle and the second baffle are adapted to the shape of the air inlet. The first baffle is provided with a plurality of first through holes and the second baffle is provided with a plurality of second through holes. At least one of the first baffle and the second baffle is connected to the first driving component. The first driving component drives at least one of the first baffle and the second baffle to move relative to the other, so as to gradually increase the air intake of the air inlet by passing through the first through hole and the second through hole in sequence from a completely blocked state, a partially overlapping state and finally a completely overlapping state. The first baffle is rotatably embedded in the air inlet and connected to the first drive assembly; The outer casing is also provided with a second driving component. The second baffle is movably connected to the outer casing and connected to the second driving component. The second driving component can drive the second baffle to move to one side of the air inlet so that only the first baffle exists at the air outlet. In any position of the first baffle, all the first through holes on the first baffle are fully exposed. The outer casing is also provided with a third baffle and a third drive assembly. The third baffle is movably connected to the outer casing and connected to the third drive assembly. The third drive assembly can drive the third baffle to close the air inlet.

2. The fresh air device according to claim 1, characterized in that, Both the second baffle and the third baffle are located inside the centrifugal air duct, with the third baffle located on the side of the second baffle away from the first baffle.

3. The fresh air device according to claim 2, characterized in that, The inner wall of the outer casing is provided with a track, on which a first groove and a second groove are provided that are parallel to each other. The second baffle is slidably embedded in the first groove, and the third baffle is slidably embedded in the second groove.

4. The fresh air device according to any one of claims 1-3, characterized in that, The first driving component includes: A toothed ring, wherein the toothed ring is disposed around the periphery of the first baffle; A drive motor is mounted on the housing, and a gear is provided on the output shaft of the drive motor, which meshes with the gear ring.

5. The fresh air device according to claim 4, characterized in that, The gear ring is a straight bevel gear ring, and the axis of the gear is perpendicular to the axis of the gear ring.

6. The fresh air device according to claim 5, characterized in that, The housing is provided with a retaining ring, which is wrapped around the periphery of the air inlet. The gear ring is rotatably embedded in the retaining ring. The drive motor is located on the outside of the retaining ring. The retaining ring is provided with a notch to avoid the gear and part of the output shaft.

7. An air conditioner, characterized in that, It includes an indoor air conditioning unit and an outdoor air conditioning unit, wherein the indoor air conditioning unit is provided with a fresh air device as described in any one of claims 1-6.

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