An axial flow fan, an axial flow fan and an air conditioner

Abstract

This application discloses an axial flow impeller, an axial flow fan, and an air conditioner. Based on an axial flow duct system, it can adjust the air outlet direction of the air conditioner, which helps to overcome the shortcomings of current ducted air conditioners on the market where hot air is not delivered downwards during heating. It also simplifies the duct structure of the air conditioner and facilitates mass production. The axial flow impeller includes: a mounting base, one end of which is provided with a rotating part for connection to a forward and reverse reversing motor; blades, rotatably mounted on the mounting base, one side surface of the blades being set as a pressure surface; and a switching mechanism connected to the blades, configured to drive the blades to rotate relative to the mounting base, so that the blades can switch between a first working state with the pressure surface facing the rotating part and a second working state with the pressure surface facing away from the rotating part, thereby switching the airflow direction of the axial flow impeller.

Description

Technical Field

[0001] This application relates to the field of air handling equipment technology, and more specifically, to an axial flow impeller, an axial flow fan, and an air conditioner. Background Technology

[0002] Traditional ducted air conditioners have fixed air outlets, meaning airflow can only exit from these outlets, resulting in a single airflow direction and negatively impacting the user experience. To address this, some products have improved the air duct structure by creating a variable-shape duct. By altering the duct's profile, the position of the air outlet can be changed, thus adjusting the airflow direction. However, this solution employs a complex duct structure, leading to higher costs and hindering mass production. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide an axial flow impeller, an axial flow fan and an air conditioner, which can adjust the air outlet direction of the air conditioner, and is conducive to simplifying the air duct structure of the air conditioner and mass production.

[0004] This application provides an axial flow impeller, comprising: a mounting base, one end of which is provided with a rotating part for connection to a forward and reverse reversing motor; blades rotatably mounted on the mounting base, one side surface of the blades being configured as a pressure surface; and a switching mechanism connected to the blades, configured to drive the blades to rotate relative to the mounting base, so that the blades can switch between a first working state in which the pressure surface faces the rotating part and a second working state in which the pressure surface faces away from the rotating part, thereby switching the wind direction of the axial flow impeller.

[0005] This application also provides an axial flow fan, including: an axial flow impeller as described in the above embodiments; and a forward and reverse reversing motor connected to the rotating part of the axial flow impeller.

[0006] This application also provides an air conditioner, characterized in that it includes: a housing, the housing having a first air outlet and a second air outlet; and an axial flow fan as described in the above embodiments, disposed within the housing, configured to generate airflow through the first air outlet and the second air outlet and to change the direction of airflow, so that the air conditioner has a first air outlet mode in which airflow flows from the second air outlet to the first air outlet and a second air outlet mode in which airflow flows from the first air outlet to the second air outlet.

[0007] Implementing the above technical solution can achieve the following beneficial effects:

[0008] The blades have a first operating state and a second operating state. The first operating state corresponds to the forward rotation of the reversible motor, which corresponds to the first air outlet mode of the air conditioner. The second operating state corresponds to the reverse rotation of the reversible motor, which corresponds to the second air outlet mode of the air conditioner. In the first operating state, the pressure surface of the blades faces the rotating part, and the reversible motor can rotate forward, generating airflow from the second air outlet to the first air outlet, realizing the first air outlet mode. In the second operating state, the pressure surface of the blades faces away from the rotating part, and the reversible motor rotates in the reverse direction, generating airflow from the first air outlet to the second air outlet, realizing the second air outlet mode.

[0009] Furthermore, in both the first and second air outlet modes, the pressure surface of the blades is in the windward position, thus generating a large air volume. This solves the problem of a significant reduction in air volume when conventional axial flow fans reverse, allowing the air conditioner to switch airflow direction without affecting the air volume. Moreover, the air duct structure of the air conditioner does not need to change its shape when switching airflow direction, which simplifies the air duct structure of the air conditioner and facilitates mass production.

[0010] In other words, the axial impeller and axial fan provided in this application embodiment can switch the direction of the pressure surface of the blades by rotating the blades, thus achieving the effect of reversible air outlet direction and large air volume in both directions.

[0011] The air conditioner provided in this application embodiment adopts an axial flow fan with reversible air outlet direction and large air volume in both directions, combined with a single fixed air duct, which can realize the adjustable air outlet direction of the air conditioner without complicating the air duct structure of the air conditioner. The structure is relatively simple, easy to implement, and conducive to mass production.

[0012] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0013] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0014] Figure 1 An exploded structural diagram of an axial flow fan in its first operating state, provided in some embodiments of this application;

[0015] Figure 2 An exploded structural diagram of an axial flow fan in its second operating state, provided in some embodiments of this application;

[0016] Figure 3This is a partially exploded structural diagram of an axial flow fan provided in some embodiments of this application;

[0017] Figure 4 for Figure 3 A side view of the structure shown;

[0018] Figure 5 A three-dimensional structural schematic diagram of an air conditioner provided in some embodiments of this application;

[0019] Figure 6 for Figure 5 A top view of the air conditioner structure shown;

[0020] Figure 7 for Figure 6 A schematic cross-sectional view of the air conditioner along direction AA.

[0021] Figure 8 for Figure 6 The diagram shows a cross-sectional view of the air conditioner along the BB direction.

[0022] Figure 9 for Figure 7 Enlarged structural diagram of section C;

[0023] Figure 10 for Figure 5 The diagram shows the exploded structure of the air conditioner.

[0024] Figure 11 for Figure 5 The diagram shows the exploded structure of the air conditioner in the first air outlet mode.

[0025] Figure 12 for Figure 5 The diagram shows a three-dimensional structural schematic of the axial fan of the air conditioner in the first air outlet mode.

[0026] Figure 13 for Figure 12 A side view of the axial flow fan shown.

[0027] Figure 14 for Figure 5 The diagram shows a cross-sectional view of the air conditioner in the first air outlet mode.

[0028] Figure 15 for Figure 5 The diagram shows the exploded structure of the air conditioner in the second air outlet mode.

[0029] Figure 16 for Figure 5 The diagram shows a three-dimensional structural schematic of the axial fan of the air conditioner in the second air outlet mode.

[0030] Figure 17 for Figure 16A side view of the axial flow fan shown.

[0031] Figure 18 for Figure 5 The diagram shows a cross-sectional view of the air conditioner in the second air outlet mode.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 100 axial flow impeller, 200 axial flow fan, 300 air conditioner;

[0034] 1 Mounting base, 11 Mounting cylinder, 111 First shaft hole, 112 Second shaft hole, 12 Mounting cover, 121 Rotating part, 13 Mounting cavity;

[0035] 2 blades, 21 blade body, 211 pressure surface, 22 rotating shaft;

[0036] 3. Switching mechanism, 31. Driver, 311. Driver body, 312. Drive shaft, 32. Driving bevel gear, 33. Driven bevel gear, 34. Drive seat, 341. Third shaft hole.

[0037] 4 forward and reverse motors, 41 output shafts;

[0038] 5. Motor bracket, 51. Support base, 52. Connecting arm;

[0039] 6. Casing, 61. Partition, 611. Ventilation opening, 612. Guide ring, 62. Heat exchange chamber, 621. First air outlet, 63. Fan chamber, 631. Second air outlet, 64. Air duct components, 65. Chassis, 66. Cover plate.

[0040] 7. Heat exchanger. Detailed Implementation

[0041] The principles and features of this application are described below with reference to the accompanying drawings. The examples given are only for explaining this application and are not intended to limit the scope of this application.

[0042] like Figures 1 to 18 As shown, this application embodiment provides an axial flow impeller 100, an axial flow fan 200, and an air conditioner 300. The air conditioner 300 can be the indoor unit of a split-type air conditioner, or a split-type air conditioner including an indoor unit and an outdoor unit, or an integrated air conditioner.

[0043] Classified by installation method, the 300 air conditioner can be, but is not limited to, ceiling-mounted air conditioners, such as ducted air conditioners. The following explanation will take ducted air conditioners as an example.

[0044] like Figures 5 to 10 As shown, the air conditioner 300 includes a housing 6 and an axial flow fan 200. The housing 6 is provided with a first air vent 621 and a second air vent 631. The first air vent 621 can be a side air vent, and the second air vent 631 can be a down air vent.

[0045] An axial flow fan 200 is disposed inside the housing 6 and configured to generate airflow through the first air outlet 621 and the second air outlet 631 and to change the direction of the airflow, so that the air conditioner 300 has a first air outlet mode in which the airflow flows from the second air outlet 631 to the first air outlet 621 (e.g., Figures 11 to 14 (as shown) and the second air outlet pattern (such as) where the airflow flows from the first air outlet 621 to the second air outlet 631. Figures 15 to 18 (As shown).

[0046] like Figure 1 and Figure 2 As shown, the axial flow fan 200 includes an axial flow impeller 100 and a forward / reverse motor 4. The forward / reverse motor 4 is connected to the axial flow impeller 100 and is configured to drive the axial flow impeller 100 to rotate in both directions to change the direction of airflow.

[0047] In some exemplary embodiments, the axial flow impeller 100 includes: a mounting base 1, blades 2, and a switching mechanism 3, such as... Figure 7 As shown.

[0048] One end of the mounting base 1 is provided with a rotating part 121 for connecting to the forward and reverse motor 4, such as... Figure 2 As shown. Blade 2 is rotatably mounted on mounting base 1. One side surface of blade 2 is configured as pressure surface 211, as shown. Figure 1 and Figure 2 As shown.

[0049] The switching mechanism 3 is connected to the blade 2 and is configured to drive the blade 2 to rotate relative to the mounting base 1, so that the blade 2 can be in a first working state (e.g., the pressure surface 211 faces the rotating part 121) Figure 1 , Figure 12 , Figure 13 and Figure 14 As shown) the second working state where the pressure surface 211 faces away from the rotating part 121 (as shown) Figure 2 , Figure 16 , Figure 17 and Figure 18 Switch between (as shown) to change the wind direction of the axial flow fan 100.

[0050] The rotating part 121 can be a shaft, a shaft hole, or other structures. The rotating part 121 can be connected to the output shaft 41 of the forward / reverse motor 4, such as... Figure 9 As shown, it rotates under the drive of the forward and reverse motor 4, which in turn drives the axial flow fan 100 to rotate.

[0051] Blade 2 has a first operating state and a second operating state. The first operating state corresponds to the forward rotation of the reversible motor 4, corresponding to the first air outlet mode of the air conditioner 300. The second operating state corresponds to the reverse rotation of the reversible motor 4, corresponding to the second air outlet mode of the air conditioner 300. In the first operating state, such as... Figure 12 and Figure 13 As shown, the pressure surface 211 of blade 2 faces the rotating part 121, and the forward and reverse motor 4 can rotate in the forward direction, generating airflow from the second air outlet 631 to the first air outlet 621, realizing the first air outlet mode, i.e., the side air outlet mode. In the second working state, as... Figure 16 and Figure 17 As shown, the pressure surface 211 of the blade 2 faces away from the rotating part 121, and the forward and reverse motor 4 rotates in the opposite direction to generate airflow from the first air outlet 621 to the second air outlet 631, thereby realizing the second air outlet mode, namely the downward air outlet mode.

[0052] Furthermore, in both the first and second air outlet modes, the pressure surface 211 of blade 2 is in an upwind position, such as... Figure 14 and Figure 18 As shown, both can generate a large air volume, solving the problem of a significant reduction in air volume when the conventional axial fan 200 reverses. This allows the air conditioner 300 to switch airflow direction without affecting the air volume. Furthermore, the air duct structure of the air conditioner 300 does not need to change its shape when switching airflow direction, which simplifies the air duct structure of the air conditioner 300 and facilitates mass production.

[0053] In other words, the axial impeller and axial fan 200 provided in this application embodiment can switch the orientation of the pressure surface 211 of the blade 2 by rotating the blade 2, thereby achieving the effect that the air outlet direction of the axial fan 200 is reversible and both air directions have a large air volume.

[0054] The air conditioner 300 provided in this application embodiment adopts an axial flow fan 200 with reversible air outlet direction and large air volume in both directions, combined with a single fixed air duct, which can realize the adjustable air outlet direction of the air conditioner 300 without complicating the air duct structure of the air conditioner 300. The structure is relatively simple, easy to implement, and conducive to mass production.

[0055] It is understandable that the correspondence between the two working states of blade 2, the two directions of the forward and reverse motor 4, and the two air outlet modes of the air conditioner 300 is related to the relative positions of the forward and reverse motor 4 and the axial flow impeller 100 within the casing 6. These can be adjusted as needed, as long as it ensures that the forward and reverse motor 4 can generate a large volume of airflow when it rotates forward and reverse.

[0056] In some exemplary embodiments, the switching mechanism 3 includes a driver 31 and a transmission assembly. The driver 31 is connected to the transmission assembly. The transmission assembly is connected to the blade 2 and is configured to drive the blade 2 to rotate under the drive of the driver 31.

[0057] The specific structural form of the driver 31 and the transmission assembly is not limited. The driver 31 can be, but is not limited to, a motor.

[0058] Alternatively, the switching mechanism 3 may not include a transmission component, and the driver 31 may be directly connected to the blade 2.

[0059] During the switching between the first and second working states, the rotation range of blade 2 can be, but is not limited to, 180°, so that blade 2 can have maximum efficiency in both working states.

[0060] In some exemplary embodiments, the number of blades 2 is multiple, such as two or three (e.g., ...). Figure 3 and Figure 4 (As shown) or more. Multiple blades 2 are arranged at intervals along the circumference of the mounting base 1, for example, at uniform intervals. This helps to increase the air volume of the axial flow impeller 100, thereby helping to increase the air volume output of the air conditioner 300. As for the specific number of blades 2, there is no limit, as long as they can be distributed and do not affect the rotation of individual blades 2.

[0061] like Figure 3 and Figure 4 As shown, the transmission assembly is connected to multiple blades 2 and is configured to drive the multiple blades 2 to rotate synchronously under the drive of the driver 31. In this way, only one driver 31 is needed to achieve synchronous rotation of multiple blades 2, which helps to simplify the switching mechanism 3, reduce production costs, and also helps to reduce the size of the switching mechanism 3.

[0062] In some exemplary embodiments, such as Figure 3 and Figure 4 As shown, the rotation axes 22 of the multiple blades 2 are coplanar. This helps to reduce the axial dimension of the axial flow impeller 100 and also helps to ensure uniform force distribution on the axial flow impeller 100.

[0063] In some exemplary embodiments, the driver 31 is provided with a drive shaft 312 (e.g., Figure 2 As shown), the axial direction of the drive shaft 312 is perpendicular to the rotation axis 22 of the multiple blades 2, as shown. Figure 1 As shown. In this way, the driver 31 is located in the axial region of the axial impeller, resulting in less wind resistance, which is beneficial to increasing the air volume of the axial impeller 100.

[0064] In some exemplary embodiments, the transmission assembly is configured as a gear transmission assembly. The gear transmission assembly includes a driving bevel gear 32 and a plurality of driven bevel gears 33, such as... Figure 3, Figure 4 and Figure 9 As shown. The driving bevel gear 32 is connected to the driver 31, and multiple driven bevel gears 33 are connected one by one to multiple blades 2. The multiple driven bevel gears 33 are arranged at intervals along the circumference of the driving bevel gear 32 and mesh with the driving bevel gear 32.

[0065] Of course, the transmission assembly is not limited to the structure of the gear transmission assembly mentioned above. For example, a universal joint or other transmission structure can be used, as long as it can transmit the driving force of the driver 31 to multiple blades 2, so that multiple blades 2 can rotate together around their respective rotation axes 22.

[0066] In one embodiment, such as Figure 3 and Figure 4 As shown, there are three blades 2 and three driven bevel gears 33. The rotation axes 22 of the three driven bevel gears 33 are coplanar and perpendicular to the rotation axis 22 of the driving bevel gear 32. The three driven bevel gears 33 and the driving bevel gear 32 form a structure similar to an umbrella or a pyramid.

[0067] In some exemplary embodiments, the mounting base 1 is provided with a mounting cavity 13 for mounting a transmission assembly (e.g., ...). Figure 9 As shown), and the first shaft hole 111 and the second shaft hole 112 communicating with the mounting cavity 13, as Figure 2 As shown. There can be multiple second shaft holes 112, and each of the multiple second shaft holes 112 is set in a one-to-one correspondence with a multiple blade 2.

[0068] like Figure 9 As shown, the driver 31 includes a drive body 311 and a drive shaft 312 connected to each other. The drive body 311 is located outside the mounting cavity 13, and the drive shaft 312 is connected to a transmission component (such as a drive bevel gear 32) through a first shaft hole 111. Alternatively, the drive shaft 312 may pass through the first shaft hole 111 and be connected to the transmission component. Or, the transmission component may pass through the first shaft hole 111 and be connected to the drive shaft 312. The drive bevel gear 32 may be connected to a support shaft.

[0069] like Figure 9As shown, the blade 2 includes a blade body 21 and a rotating shaft 22 connected to one end of the blade body 21. The blade body 21 is located outside the mounting cavity 13. The rotating shaft 22 is connected to a transmission assembly (such as a driven bevel gear 33) through a second shaft hole 112. Alternatively, the rotating shaft 22 can pass through the second shaft hole 112 and be connected to the transmission assembly. Or, the transmission assembly can pass through the second shaft hole 112 and be connected to the rotating shaft 22. Alternatively, the rotating shaft 22 and the driven bevel gear 33 can be integrated into a single structure. During assembly, after the rotating shaft 22 extends out of the second shaft hole 112, it is then fixedly connected to the root of the blade body 21 by fasteners, welding, or other methods. In this configuration, the rotating shaft 22 of the blade body 21 and the support shaft of the driven bevel gear 33 are essentially combined into one.

[0070] The drive shaft 312 and the transmission component (such as the active bevel gear 32) can be connected by a shaft-hole fit, which can be an interference fit, a non-circular shaft-hole fit, or a fastener connection, as long as the drive shaft 312 can drive the transmission component to rotate.

[0071] The rotating shaft 22 and the transmission component (such as the corresponding driven bevel gear 33) can be connected by a shaft-hole fit. This can be an interference fit, a non-circular shaft-hole fit, or a fastener connection, as long as the transmission component can drive the rotating shaft 22 to rotate.

[0072] The diameters of the first shaft hole 111 and the second shaft hole 112 can be set to be relatively large so that the shafts supporting the driving bevel gear 32 and the driven bevel gear 33 can be relatively thicker, which is beneficial to improving the stability and reliability of the driving bevel gear 32 and the driven bevel gear 33.

[0073] In some exemplary embodiments, such as Figure 1 and Figure 2 As shown, the mounting base 1 includes a mounting cylinder 11 with one end open and a mounting cover 12 covering the open end of the mounting cylinder 11. The split design of the mounting base 1 facilitates the assembly of the transmission components.

[0074] like Figure 1 and Figure 2 As shown, the rotating part 121 is provided on the mounting cover 12, the first shaft hole 111 is provided on the end wall of the mounting cylinder 11 away from the mounting cover 12, and the second shaft hole 112 is provided on the side wall of the mounting cylinder 11. Of course, the opening can also be provided at the other end of the mounting cylinder 11, and the mounting cover 12 can also be provided at the other end of the mounting cylinder 11.

[0075] The mounting cylinder 11 can be cylindrical, and the mounting cover 12 can be a circular plate structure.

[0076] The rotating part 121 can be a columnar structure. The rotating part 121 can be connected to the output shaft 41 of the forward and reverse motor 4 through a shaft hole fit. This can be an interference fit, a non-circular shaft hole fit, or a fastener connection, as long as the forward and reverse motor 4 can drive the axial flow impeller to rotate.

[0077] In some exemplary embodiments, such as Figure 1 , Figure 2 and Figure 9 As shown, the switching mechanism 3 also includes a drive seat 34, which is located between the mounting base 1 and the drive body 311 and is supported on the mounting base 1. The drive body 311 is mounted on the drive seat 34.

[0078] like Figure 9 As shown, the drive seat 34 and the mounting seat 1 are stacked together and can be fixedly connected. The drive shaft 312 of the driver 31 can be relatively thinner, and the support shaft of the drive bevel gear 32 can be inserted into the mounting seat 1 through the first shaft hole 111. The mounting seat 1 can be provided with a third shaft hole 341, such as... Figure 2 As shown, the drive shaft 312 can pass through the third shaft hole 341 and be connected to the support shaft of the drive bevel gear 32.

[0079] like Figure 1 and Figure 2 As shown, the axial flow fan 200 provided in this application embodiment includes the axial flow impeller 100 of any of the above embodiments, and therefore has all the above-mentioned beneficial effects, which will not be repeated here.

[0080] In some exemplary embodiments, such as Figure 1 and Figure 2 As shown, the axial flow fan 200 also includes: a motor bracket 5, and a forward and reverse motor 4 is mounted on the motor bracket 5.

[0081] like Figure 2 As shown, the motor bracket 5 may include a support base 51 and multiple connecting arms 52, which may be radially distributed along the circumference of the support base 51. A reversible motor 4 is mounted on the support base 51. The support base 51 may be a hollow structure, and the reversible motor 4 may be fitted inside the support base 51 and fixedly connected to it by fasteners. The multiple support arms may be connected to the support carrier of the axial flow fan 200 (such as the guide ring 612 described below).

[0082] like Figures 5 to 18 As shown, the air conditioner 300 provided in this application embodiment includes the axial flow fan 200 of any of the above embodiments, and therefore has all the above-mentioned beneficial effects, which will not be repeated here.

[0083] In some exemplary embodiments, such as Figure 5 and Figure 7As shown, the first air vent 621 and the second air vent 631 have different air outlet directions. The first air vent 621 is set as a side air vent, and the second air vent 631 is set as a downwind air vent. The side air vent is located above the downwind air vent, so the side air vent can also be called the upwind air vent.

[0084] In this way, in cooling mode, the air conditioner 300 can use the first air outlet mode, such as... Figure 14 As shown, the airflow enters the air conditioner 300 through the downdraft vent and exits through the side vent, which helps avoid direct cold air blowing on the user and also facilitates long-distance airflow. In heating mode, the air conditioner 300 can use a second airflow mode, where the airflow enters the air conditioner 300 through the side vent and exits through the downdraft vent, as shown... Figure 18 As shown, this design facilitates the hot air to fall to the ground, achieving a warming effect on the feet and improving the user's heating experience.

[0085] In some exemplary embodiments, such as Figure 10 As shown, the housing 6 includes a chassis 65, a cover plate 66, side panels, and other structures. The chassis 65, cover plate 66, and side panels can be combined to form a box-like structure that is roughly rectangular in shape. Part of the side panel can be integrally formed with the chassis 65, and another part can be integrally formed with the cover plate 66, in order to reduce the number of parts in the housing 6 and simplify the assembly process.

[0086] In some exemplary embodiments, such as Figure 5 and Figure 10 As shown, a partition 61 is provided inside the casing 6, dividing the internal space of the casing 6 into a fan chamber 63 and a heat exchange chamber 62. A heat exchanger 7 may be installed in the heat exchange chamber 62. A first air vent 621 is located on the side wall of the heat exchange chamber 62, thus the first air vent 621 is a side air vent. A second air vent 631 is located on the bottom wall of the fan chamber 63, thus the second air vent 631 is a bottom air vent. The partition 61 has a ventilation opening 611 connecting the fan chamber 63 and the heat exchange chamber 62. The axial flow fan 200 is at least partially located within the fan chamber 63 and is correspondingly arranged with the ventilation opening 611. The ventilation opening 611 may be circular in shape.

[0087] In some exemplary embodiments, such as Figure 8 , Figure 10 , Figure 11 and Figure 15 As shown, a guide ring 612 is also provided inside the fan cavity 63. The guide ring 612 is located at the vent 611, and the axial flow fan 200 is installed radially inside the guide ring 612. The guide ring 612 can guide the airflow to the vent 611, which helps to reduce wind loss and increase the air volume of the air conditioner 300.

[0088] The connecting arm 52 of the motor bracket 5 of the axial flow fan 200 can be connected to the end of the guide ring 612 near the partition 61, which facilitates the use of the strength of the partition 61 to improve the support strength of the axial flow fan 200. In this way, a part of the axial flow fan 200 is located inside the heat exchange chamber 62.

[0089] In some embodiments, the guide ring 612 and the baffle 61 are configured as an integral structure, which is beneficial to improving the connection strength between the guide ring 612 and the baffle 61, and also to simplifying the assembly process of the air conditioner 300. Of course, the guide ring 612 and the baffle 61 can also be configured as separate structures.

[0090] In some exemplary embodiments, such as Figure 10 As shown, the fan cavity 63 is also equipped with a duct component 64 that connects the second air outlet 631 and the guide ring 612. The duct component 64 can be a roughly L-shaped pipe component. The duct component 64 can connect the second air outlet 631 and the guide ring 612, which plays a better role in guiding the airflow, which helps to reduce wind loss and improve the air volume of the air conditioner 300.

[0091] In some exemplary embodiments, the number of second air vents 631 is multiple, such as two (e.g., ...). Figure 5 and Figure 10 (As shown), three or more. Multiple second air vents 631 are spaced apart along the length of the casing 6. Multiple axial flow fans 200 are present, with each fan corresponding to one of the multiple second air vents 631. This helps to increase the air volume output of the air conditioner 300.

[0092] The specific number of axial flow fans 200 can be reasonably set according to the air volume requirements of air conditioner 300 and the air volume of axial flow fans 200. Of course, the number of axial flow fans 200 can also be one.

[0093] In summary, the air conditioner provided in this application embodiment does not require complex duct structures (such as adjusting the duct profile) to adjust the airflow. Instead, it achieves airflow direction adjustment by adjusting the pressure surface orientation of the axial flow fan blades and the rotation direction of the motor, enabling both upward and downward airflow control of the duct unit. Since no changes to the duct structure are involved during use, the reliability of the overall unit's reversible airflow control is greatly improved. Furthermore, the reversible axial flow fan allows for flexible and rapid fulfillment and control of the upward and downward airflow requirements of the duct unit, providing better cooling, heating, and airflow comfort.

[0094] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0095] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0096] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0097] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0098] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0099] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An axial flow impeller, characterized in that, include: Mounting base, one end of which is provided with a rotating part for connecting to a forward and reverse reversing motor; The blade is rotatably mounted on the mounting base, and one side surface of the blade is configured as a pressure surface; and A switching mechanism, connected to the blade, is configured to drive the blade to rotate relative to the mounting base, so that the blade can switch between a first working state in which the pressure surface faces the rotating part and a second working state in which the pressure surface faces away from the rotating part, thereby switching the wind direction of the axial flow impeller.

2. The axial flow impeller according to claim 1, characterized in that, The switching mechanism includes: a driver and a transmission assembly; the driver is connected to the transmission assembly; the transmission assembly is connected to the blade and is configured to drive the blade to rotate under the drive of the driver.

3. The axial flow impeller according to claim 2, characterized in that, The number of blades is multiple, and the multiple blades are arranged at circumferential intervals along the mounting base; the transmission assembly is connected to the multiple blades and is configured to drive the multiple blades to rotate synchronously under the drive of the driver.

4. The axial flow impeller according to claim 3, characterized in that, The transmission assembly is configured as a gear transmission assembly, which includes: a driving bevel gear and multiple driven bevel gears; The driving bevel gear is connected to the driver, and the multiple driven bevel gears are connected to the multiple blades one by one. The multiple driven bevel gears are arranged at intervals along the circumference of the driving bevel gear and mesh with the driving bevel gear.

5. The axial flow impeller according to claim 3, characterized in that, The rotation axes of the plurality of blades are coplanar; and / or The driver is provided with a drive shaft, the axial direction of which is perpendicular to the rotation axes of the plurality of blades.

6. The axial flow impeller according to claim 2, characterized in that, The mounting base is provided with a mounting cavity for mounting the transmission assembly, and a first shaft hole and a second shaft hole communicating with the mounting cavity; The driver includes a drive body and a drive shaft connected together. The drive body is located outside the mounting cavity, and the drive shaft is connected to the transmission assembly through the first shaft hole. The blade includes a blade body and a rotating shaft connected to one end of the blade body. The blade body is located outside the mounting cavity. The rotating shaft is connected to the transmission assembly through the second shaft hole.

7. The axial flow impeller according to claim 6, characterized in that, The mounting base includes a mounting cylinder with one open end and a mounting cover disposed on the open end of the mounting cylinder. The rotating part is disposed on the mounting cover. The first shaft hole is disposed on the end wall of the mounting cylinder away from the mounting cover, and the second shaft hole is disposed on the side wall of the mounting cylinder; and / or The switching mechanism further includes a drive seat, which is located between the mounting base and the drive body and is supported on the mounting base, and the drive body is mounted on the drive seat.

8. An axial flow fan, characterized in that, include: Axial flow wind turbine as described in any one of claims 1 to 7; and A reversible motor is connected to the rotating part of the axial flow fan.

9. The axial flow fan according to claim 8, characterized in that, Also includes: Motor bracket, on which the forward and reverse motor is mounted.

10. An air conditioner, characterized in that, include: The housing is provided with a first air vent and a second air vent; and The axial flow fan as described in claim 8 or 9 is disposed within the housing and configured to generate airflow through the first air outlet and the second air outlet and to change the direction of airflow, so that the air conditioner has a first air outlet mode in which airflow flows from the second air outlet to the first air outlet and a second air outlet mode in which airflow flows from the first air outlet to the second air outlet.

11. The air conditioner according to claim 10, characterized in that, The first air vent and the second air vent have different air outlet directions. The first air vent is set as a side air vent, and the second air vent is set as a downwind vent. The side air vent is located above the downwind vent.

12. The air conditioner according to claim 10 or 11, characterized in that, The housing is provided with a partition, which divides the internal space of the housing into a fan chamber and a heat exchange chamber. The first air outlet is located on the side wall of the heat exchange chamber, and the second air outlet is located on the bottom wall of the fan chamber. The partition is provided with a ventilation opening that connects the fan chamber and the heat exchange chamber. The axial flow fan is at least partially located in the fan chamber and is arranged corresponding to the ventilation opening.

13. The air conditioner according to claim 12, characterized in that, The fan cavity is also provided with a guide ring, which is located at the ventilation opening, and the axial flow fan is installed on the radial inner side of the guide ring.

14. The air conditioner according to claim 13, characterized in that, The fan cavity is also equipped with a duct component that connects the second air outlet and the guide ring.

15. The air conditioner according to claim 10 or 11, characterized in that, The number of second air vents is multiple, and the multiple second air vents are spaced apart along the length direction of the casing; The number of axial flow fans is multiple, and each of the multiple axial flow fans is set up in a one-to-one correspondence with a multiple of the second air outlets.

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