Fan assembly and air conditioning cabinet having the same

Abstract

The present invention provides a fan assembly and an air conditioning cabinet having the same. The fan assembly includes a first air duct portion and a second air duct portion which can be arranged with the first air duct portion to form a ventilation channel; the fan portion is arranged in the ventilation channel; and an air duct switching mechanism, the air duct switching mechanism is connected to the first air duct portion, and the first air duct portion can be moved along the radial direction of the second air duct portion through the air duct switching mechanism, so that the first air duct portion has an open position to open the ventilation channel, and has a closed position to close the ventilation channel. The first air duct portion and the second air duct portion are arranged in the fan assembly, and the first air duct portion and the second air duct portion can be arranged to form a ventilation channel, and the air duct switching mechanism is controlled to realize the opening or closing of the ventilation channel. Such an arrangement can enable the fan assembly to realize a variety of air outlet modes, and at the same time can reduce the air volume loss of the fan assembly. The air outlet efficiency of the air conditioning cabinet having the fan assembly is improved, and the user experience is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a fan assembly and an air conditioning cabinet having the same. Background Art

[0002] At present, the most widely used fan blades on air-conditioning products are centrifugal fan blades, cross-flow fan blades and axial flow fan blades. Each fan blade has different effects to meet the requirements of different air-conditioning product development. Different fan blade forms are configured to meet the model development for different usage requirements and different air inlet and outlet needs. The mixed flow fan blades used in the prior art have a complex structure and large air volume loss, resulting in a poor user experience. Summary of the invention

[0003] The main purpose of the present invention is to provide a fan assembly and an air conditioning cabinet having the same, so as to solve the problem of large air volume loss of mixed flow fans in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a fan assembly is provided, including: a first air duct portion; a second air duct portion, which can be arranged together with the first air duct portion to form a ventilation channel; a fan portion, which is arranged in the ventilation channel; and an air duct switching mechanism, which is connected to the first air duct portion and can move the first air duct portion in a radial direction of the second air duct portion through the air duct switching mechanism, so that the first air duct portion has an open position to open the ventilation channel, and a closed position to close the ventilation channel.

[0005] Furthermore, the first air duct portion includes: a first component section, the first component section includes a first frame, the first end of the first frame is movably connected to the air duct switching mechanism, and the first frame is used to install the air duct enclosure; a second component section, the second component section includes a second frame, the first end of the second frame is movably connected to the air duct switching mechanism, the first component section and the second component section are arranged opposite to each other, and the second frame is used to install the air duct enclosure, when the first air duct portion is in an open position, the first component section and the second component section enclose a first sealed channel, and when the first air duct portion is in a closed position, the first component section and the second component section move along the radial direction of the second air duct portion to a first preset position.

[0006] Furthermore, the first air duct portion also includes: a third component segment, the third component segment includes a third frame, the first end of the third frame is movably connected to the air duct switching mechanism, the third component segment is located outside the first component segment, and the third frame is used to install the air duct enclosure; a fourth component segment, the fourth component segment includes a fourth frame, the first end of the fourth frame is movably connected to the air duct switching mechanism, the fourth component segment is located outside the second component segment, the fourth component segment is arranged opposite to the third component segment, the second end of the third component segment and the second end of the fourth component segment can be enclosed to form a second sealed channel, the first sealed channel is connected to the second air duct portion through the second sealed channel, and the fourth frame is used to install the air duct enclosure.

[0007] Furthermore, when the first air duct portion is in the open position, the third and fourth segments are arranged to form a second sealed channel, and when the first air duct portion is in the closed position, the third and fourth segments move along the radial direction of the second air duct portion to a second preset position.

[0008] Further, when the air duct switching mechanism drives the third component segment and the fourth component segment to move outward along the radial direction of the second air duct portion to the first preset position, the third component segment drives the first component segment to move to the second preset position, and the fourth component segment drives the second component segment to move to the second preset position.

[0009] Further, at least one of the third component segment and the first component segment is provided with a first stop structure, and the third component segment drives the first component segment to move through the first stop structure, and / or, at least one of the fourth component segment and the second component segment is provided with a second stop structure, and the fourth component segment drives the second component segment to move through the second stop structure.

[0010] Further, the inner diameter of the first sealing channel is a constant diameter structure, and / or the inner diameter of the second sealing channel is arranged to gradually increase in a direction away from the first sealing channel.

[0011] Further, there are multiple third skeletons, the multiple third skeletons are arranged in pairs, and the third skeletons arranged in pairs are connected by air duct enclosures, and / or there are multiple fourth skeletons, the multiple fourth skeletons are arranged in pairs, and the fourth skeletons arranged in pairs are connected by air duct enclosures.

[0012] Furthermore, a rack extending in the horizontal direction is provided on the third frame and / or the fourth frame, and the air duct switching mechanism is provided with a driving gear meshing with the rack.

[0013] Furthermore, the air duct switching mechanism includes: a support frame, the support frame is connected to the installation base, and the first component segment, the second component segment, the third component segment, and the fourth component segment are movably connected to the support frame; a driving part, the output end of the driving part is provided with a driving gear, and the driving part drives the first component segment and the third component segment to move along the first direction to the open position through the driving gear, and / or the driving part can drive the second component segment and the fourth component segment to move along the second direction opposite to the first direction to the open position through the driving gear.

[0014] Furthermore, a ventilation hole is provided in the middle of the support frame, and when the third and fourth component segments are in the closed position, the inner circumferences of the third and fourth component segments are located outside the hole wall of the ventilation hole.

[0015] Furthermore, the second air duct portion includes: an air duct body, the diameter of the air duct body is gradually reduced from the first end to the second end of the air duct body, and the fan portion is arranged in the first end of the air duct body.

[0016] Furthermore, the fan unit includes: a hub; a plurality of mixed flow blades, the plurality of mixed flow blades are arranged at intervals along the circumference of the hub, and the mixed flow blades are arranged at a distance from the side wall of the air duct body; a blade driving unit, the blade driving unit is connected to the hub, and the blade driving unit can drive the hub to drive the mixed flow blades to rotate relative to the air duct body.

[0017] Furthermore, the fan unit also includes: a splitter blade, which is connected to the hub, there are multiple splitter blades, a splitter blade is arranged between adjacent mixed flow blades, and the length of the splitter blade in the vertical direction is smaller than the length of the mixed flow blade in the vertical direction.

[0018] Furthermore, the fan unit also includes: a guide blade, which is arranged in the second end of the duct body and connected to the side wall of the duct body. There are multiple guide blades, and the multiple guide blades are arranged at intervals along the circumference of the duct body. The multiple guide blades are all located above the fan unit.

[0019] Further, when the first air channel portion is located at the open position, part of the guide blades extend into the first air channel portion.

[0020] According to another aspect of the present invention, an air conditioning cabinet is provided, comprising a fan assembly, wherein the fan assembly is the above-mentioned fan assembly.

[0021] Furthermore, the air conditioning cabinet includes: a shell having an upper air port and a lower air port; a heat exchanger, the heat exchanger is arranged in the shell, and at least one fan assembly is arranged in the shell. The fan assembly can introduce the airflow outside the shell into the shell through the upper air port, exchange heat with the heat exchanger, and then discharge it outside the shell through the lower air port. Alternatively, the fan assembly can introduce the airflow outside the shell into the shell through the lower air port, exchange heat with the heat exchanger, and then discharge it outside the shell through the upper air port.

[0022] By applying the technical solution of the present invention, a first air duct portion and a second air duct portion are arranged in the fan assembly, and the first air duct portion and the second air duct portion can be arranged to form a ventilation channel, and an air duct switching mechanism is arranged to control the air duct switching mechanism to realize opening or closing of the ventilation channel. Such an arrangement enables the fan assembly to realize multiple air outlet modes, and at the same time can reduce the air volume loss of the fan assembly. The air outlet efficiency of the air conditioner cabinet with the fan assembly is improved, and the user experience is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It shows a schematic structural diagram of a first embodiment of a fan unit according to the present invention;

[0025] Figure 2 It shows a structural schematic diagram of a second embodiment of a fan unit according to the present invention;

[0026] Figure 3 A schematic structural diagram of a first embodiment of a fan assembly according to the present invention is shown;

[0027] Figure 4 A schematic cross-sectional view of a second embodiment of a fan assembly according to the present invention is shown;

[0028] Figure 5 A schematic structural diagram of a third embodiment of a fan assembly according to the present invention is shown;

[0029] Figure 6 A schematic cross-sectional view of a fourth embodiment of a fan assembly according to the present invention is shown;

[0030] Figure 7 FIG. 4 is a schematic diagram of an exploded structure of a sixth embodiment of a fan assembly according to the present invention.

[0031] 10. The first air duct section;

[0032] 11. The first skeleton;

[0033] 12. Second skeleton;

[0034] 13. The third skeleton;

[0035] 14. Fourth skeleton;

[0036] 20. Second air duct portion; 21. Air duct body;

[0037] 30. Fan unit; 31. Hub; 32. Mixed flow blade; 33. Splitter blade; 34. Guide blade;

[0038] 40. Air duct switching mechanism; 41. Driving gear; 42. Support frame;

[0039] 50. Rack;

[0040] 60. Ventilation holes. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0045] Combination Figures 1 to 7 As shown, according to a specific embodiment of the present invention, a fan assembly is provided.

[0046] Specifically, the fan assembly includes a first air duct portion 10, a second air duct portion 20, a fan portion 30 and an air duct switching mechanism 40. The second air duct portion 20 can be arranged with the first air duct portion 10 to form a ventilation channel. The fan portion 30 is arranged in the ventilation channel. The air duct switching mechanism 40 is connected to the first air duct portion 10, and the first air duct portion 10 can be moved along the radial direction of the second air duct portion 20 through the air duct switching mechanism 40, so that the first air duct portion 10 has an open position to open the ventilation channel, and has a closed position to close the ventilation channel.

[0047] In this embodiment, the first air duct section 10 includes a first component section and a second component section. The first component section includes a first frame 11. The first end of the first frame 11 is movably connected to the air duct switching mechanism 40. The first frame 11 is used to install the air duct enclosure. The second component section includes a second frame 12. The first end of the second frame 12 is movably connected to the air duct switching mechanism 40, and the first component section and the second component section are arranged opposite to each other. The second frame 12 is used to install the air duct enclosure. When the first air duct section 10 is in the open position, the first component section and the second component section are arranged to form a first sealed channel. When the first air duct section 10 is in the closed position, the first component section and the second component section move to the first preset position along the radial direction of the second air duct section 20. This arrangement can drive the first component section and the second component section to the corresponding position through the air duct switching mechanism 40 according to the actual air outlet needs, which effectively improves the practicality of the fan assembly.

[0048] The first air duct section 10 also includes a third component section and a fourth component section. The third component section includes a third frame 13. The first end of the third frame 13 is movably connected to the air duct switching mechanism 40. The third component section is located on the outside of the first component section, and the third frame 13 is used to install the air duct enclosure. The fourth component section includes a fourth frame 14. The first end of the fourth frame 14 is movably connected to the air duct switching mechanism 40. The fourth component section is located on the outside of the second component section, and the fourth component section is arranged opposite to the third component section. The second end of the third component section and the second end of the fourth component section can be enclosed to form a second sealed channel. The first sealed channel is connected to the second air duct section 20 through the second sealed channel, and the fourth frame 14 is used to install the air duct enclosure. This arrangement can set the relatively arranged component sections into different structures according to actual needs, so that the first air duct section can achieve different air intake methods, thereby improving the air outlet efficiency of the fan assembly. Among them, if Figure 4 As shown, A, B, C, and D represent the first component segment, the second component segment, the third component segment, and the fourth component segment, respectively.

[0049] When the first air duct portion 10 is in the open position, the third component segment and the fourth component segment are arranged to form a second sealed channel. When the first air duct portion 10 is in the closed position, the third component segment and the fourth component segment move to the second preset position along the radial direction of the second air duct portion 20. After the air duct switching mechanism 40 drives the third component segment and the fourth component segment to move outward along the radial direction of the second air duct portion 20 to the first preset position, the third component segment drives the first component segment to move to the second preset position, and the fourth component segment drives the second component segment to move to the second preset position. This arrangement makes the component structure of each component segment simple, and each component segment can be easily driven to the preset position through the air duct switching mechanism, thereby improving the reliability of the fan assembly.

[0050] In order to further improve the driving stability of the fan assembly, at least one of the third component segment and the first component segment is provided with a first stop structure, and the third component segment drives the first component segment to move through the first stop structure. At least one of the fourth component segment and the second component segment is provided with a second stop structure, and the fourth component segment drives the second component segment to move through the second stop structure.

[0051] like Figure 4 As shown, the inner diameter of the first sealed channel is a constant diameter structure, and the inner diameter of the second sealed channel is gradually increased in the direction away from the first sealed channel. This arrangement enables the upper air intake and lower air outlet to be achieved when each component segment is in the open position and the fan unit rotates.

[0052] There are multiple third frames (13), and the multiple third frames 13 are arranged in pairs. The third frames 13 arranged in pairs are connected by air duct enclosures. There are multiple fourth frames 14, and the multiple fourth frames 14 are arranged in pairs. The fourth frames 14 arranged in pairs are connected by air duct enclosures. The third frames 13 and the fourth frames 14 are provided with racks 50 extending in the horizontal direction, and the air duct switching mechanism 40 is provided with a driving gear 41 meshing with the rack 50. Figure 7 As shown, there are two third frames 13 and four frames 14, and racks 50 extending in the horizontal direction are arranged on the third frames 13 and four frames 14, and the air duct switching mechanism 40 is provided with a driving gear 41 meshing with the racks 50. Such an arrangement can improve the stability of the air duct part.

[0053] In order to improve the installation stability of the fan assembly, the air duct switching mechanism 40 includes a support frame 42 and a driving unit. The support frame 42 is connected to the installation base. The first component segment, the second component segment, the third component segment, and the fourth component segment are movably connected to the support frame 42. A driving gear 41 is provided at the output end of the driving unit, and the driving unit drives the first component segment and the third component segment to move to the open position along the first direction through the driving gear 41. The driving unit can also drive the second component segment and the fourth component segment to move to the open position along the second direction opposite to the first direction through the driving gear 41.

[0054] A ventilation hole 60 is provided in the middle of the support frame 42. When the third and fourth component segments are in the closed position, the inner circumferences of the third and fourth component segments are located outside the hole wall of the ventilation hole 60. This arrangement can prevent the third and fourth component segments from interfering with the ventilation hole 60.

[0055] like Figure 6As shown, the second air duct portion 20 includes an air duct body 21. The diameter of the air duct body 21 is gradually reduced from the first end to the second end of the air duct body 21, and the fan portion 30 is arranged in the first end of the air duct body 21. The fan portion 30 includes a hub 31, a mixed flow blade 32, a blade driving portion, a splitter blade 33 and a guide blade 34. There are multiple mixed flow blades 32, and multiple mixed flow blades 32 are arranged at intervals along the circumference of the hub 31. The mixed flow blade 32 is arranged at a distance from the side wall of the air duct body 21. The blade driving portion is connected to the hub 31, and the blade driving portion can drive the hub 31 to drive the mixed flow blade 32 to rotate relative to the air duct body 21. The splitter blade 33 is connected to the hub 31. There are multiple splitter blades 33, and one splitter blade 33 is arranged between adjacent mixed flow blades 32, and the length of the splitter blade 33 along the vertical direction is less than the length of the mixed flow blade 32 along the vertical direction. The guide vanes 34 are disposed in the second end of the air duct body 21 and connected to the side wall of the air duct body 21. There are multiple guide vanes 34, which are arranged at intervals along the circumference of the air duct body 21, and the multiple guide vanes 34 are all located above the fan part 30. When the first air duct part 10 is in the open position, part of the guide vanes 34 extends into the first air duct part 10. This arrangement can further increase the performance of the fan assembly.

[0056] The above-mentioned fan assembly can also be used in the technical field of air-conditioning equipment, that is, according to another aspect of the present invention, an air-conditioning cabinet is provided. The air-conditioning cabinet includes a fan assembly, and the fan assembly is the fan assembly in the above-mentioned embodiment. Among them, the air-conditioning cabinet includes a shell and a heat exchanger. The shell has an upper air port and a lower air port. The heat exchanger is arranged in the shell, and at least one fan assembly is arranged in the shell. The fan assembly can introduce the airflow outside the shell into the shell through the upper air port, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the lower air port. The fan assembly can also introduce the airflow outside the shell into the shell through the lower air port, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the upper air port.

[0057] Specifically, the air conditioner cabinet of the present application adopts a mixed flow fan with a special blade shape, which can realize the switch mechanism of the shrinking lower outlet of the up and down reversible outlet duct. The two different ducts are used to achieve the effect of up and down convection air outlet. In order to realize the application on the air conditioner shell, a motion mechanism is designed on the duct assembly to realize the switch mechanism of the shrinking lower outlet duct, and the gear drives the duct block telescopic mechanism to realize the opening and closing of the shrinking duct.

[0058] There are two types of fan blades. One is the basic fan blade impeller, and the other is based on the same hub and blade shape. The large end of the hub in the middle of the fan blade is added with a splitter blade according to the need for rectification or increasing the working surface. This fan blade has both the effect of axial flow working air outlet and the effect of centrifugal fan blade. The two air ducts can meet the needs of upper and lower air outlets. The difference between the two air ducts is that the opening at the top of the fan blade is drum-shaped or constricted. When it is a drum-shaped opening, it can be used for upper air outlet, and when it is a constricted opening (such as Figure 4 The inner diameter of the air duct composed of the C and D sections is gradually changed) and the upper opening can be downward. Among them, the drum-shaped air duct is equivalent to Figure 4 The air duct is composed of sections A and B, wherein the sections A and B can also be arranged to have an inner diameter that is smaller at the upper end and larger at the lower end.

[0059] The air conditioner cabinet includes a duct body, a mixed flow blade, a fan motor, and a support frame, which are common structures with the reduced duct or drum duct. The different parts of the shrinking duct switching mechanism here are mainly the shrinking duct frame, the switching mechanism motor, and several parts. The common body is a fixed structure, fixed to the main shell of the air conditioner, and the remaining drum duct frames and switching mechanism motors are fixed on it. The duct frames are accumulated one by one through the slide rail mechanism, closed with the duct body, and sealed by pre-tightening the mechanism switching motor. The connection between each frame has an undercut closed gap to achieve overall sealing, and each part cooperates to achieve the effect of driving the lower air outlet of the duct. When the lower air outlet needs to be closed, the switching mechanism motor rotates to drive the rack on the duct frame to move outward. When the edge of the outer frame cooperates with the limit buckle of the inner frame, that is, the limit piece, the two are connected as one and continue to move outward. When each part continues to move outward under the drive of the motor, it exceeds the inner circle surface of the fixed frame, and the closing effect of the lower air duct can be achieved.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0062] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fan assembly, characterized in that: include: A first air channel portion (10); A second air duct portion (20), wherein the second air duct portion (20) and the first air duct portion (10) can be arranged together to form a ventilation channel; A fan unit (30), the fan unit (30) being arranged in the ventilation passage; an air duct switching mechanism (40), the air duct switching mechanism (40) being connected to the first air duct portion (10), and the first air duct portion (10) being able to move along the radial direction of the second air duct portion (20) via the air duct switching mechanism (40), so that the first air duct portion (10) has an open position for opening the ventilation channel, and a closed position for closing the ventilation channel; The first air duct portion (10) comprises: A first assembly section, the first assembly section comprising a first frame (11), a first end of the first frame (11) being movably connected to the air duct switching mechanism (40), the first frame (11) being used for mounting an air duct enclosure; A second component section, wherein the second component section comprises a second frame (12), a first end of the second frame (12) being movably connected to the air duct switching mechanism (40), the first component section and the second component section being arranged opposite to each other, the second frame (12) being used for installing an air duct enclosure, when the first air duct section (10) is located at the open position, the first component section and the second component section are arranged to form a first sealed channel, and when the first air duct section (10) is located at the closed position, the first component section and the second component section move along the radial direction of the second air duct section (20) to a first preset position.

2. The fan assembly according to claim 1, characterized in that: The first air duct portion (10) further comprises: A third component section, the third component section comprising a third frame (13), a first end of the third frame (13) being movably connected to the air duct switching mechanism (40), the third component section being located outside the first component section, and the third frame (13) being used for mounting an air duct enclosure; A fourth component segment, the fourth component segment includes a fourth frame (14), a first end of the fourth frame (14) is movably connected to the air duct switching mechanism (40), the fourth component segment is located outside the second component segment, the fourth component segment is arranged opposite to the third component segment, the second end of the third component segment and the second end of the fourth component segment can be surrounded to form a second sealed channel, the first sealed channel is connected to the second air duct portion (20) through the second sealed channel, and the fourth frame (14) is used to install the air duct enclosure.

3. The fan assembly according to claim 2, characterized in that: When the first air duct portion (10) is located at the open position, the third component segment and the fourth component segment are arranged to form the second sealed channel, and when the first air duct portion (10) is located at the closed position, the third component segment and the fourth component segment move along the radial direction of the second air duct portion (20) to a second preset position.

4. The fan assembly according to claim 3, characterized in that: When the air duct switching mechanism (40) drives the third component segment and the fourth component segment to move outwardly along the radial direction of the second air duct portion (20) to the first preset position, the third component segment drives the first component segment to move to the second preset position, and the fourth component segment drives the second component segment to move to the second preset position.

5. The fan assembly according to claim 4, characterized in that: At least one of the third component segment and the first component segment is provided with a first stop structure, and the third component segment drives the first component segment to move through the first stop structure, and / or at least one of the fourth component segment and the second component segment is provided with a second stop structure, and the fourth component segment drives the second component segment to move through the second stop structure.

6. The fan assembly according to claim 2, characterized in that: The inner diameter of the first sealing channel is a constant diameter structure, and / or the inner diameter of the second sealing channel is gradually increased in a direction away from the first sealing channel.

7. The fan assembly according to claim 2, characterized in that: The third skeleton (13) is multiple, the multiple third skeletons (13) are arranged in pairs, and the third skeletons (13) arranged in pairs are connected by air duct enclosures, and / or the fourth skeleton (14) is multiple, the multiple fourth skeletons (14) are arranged in pairs, and the fourth skeletons (14) arranged in pairs are connected by air duct enclosures.

8. The fan assembly according to claim 2 or 7, characterized in that: The third frame (13) and / or the fourth frame (14) are provided with a rack (50) extending in a horizontal direction, and the air duct switching mechanism (40) is provided with a driving gear (41) meshing with the rack (50).

9. The fan assembly according to claim 2, characterized in that: The air duct switching mechanism (40) comprises: A support frame (42), the support frame (42) being connected to a mounting base, the first component segment, the second component segment, the third component segment, and the fourth component segment being movably connected to the support frame (42); A driving unit, wherein an output end of the driving unit is provided with a driving gear (41), and the driving unit drives the first component segment and the third component segment to move along a first direction to the open position through the driving gear (41), and / or the driving unit can drive the second component segment and the fourth component segment to move along a second direction opposite to the first direction to the open position through the driving gear (41).

10. The fan assembly according to claim 9, characterized in that: A ventilation hole (60) is provided in the middle of the support frame (42), and when the third component segment and the fourth component segment are located in the closed position, the inner circumferential surfaces of the third component segment and the fourth component segment are located outside the hole wall of the ventilation hole (60).

11. The fan assembly according to claim 1, characterized in that: The second air channel portion (20) comprises: An air duct body (21), wherein the diameter of the air duct body (21) is gradually reduced from the first end to the second end of the air duct body (21), and the fan part (30) is arranged in the first end of the air duct body (21).

12. The fan assembly according to claim 11, characterized in that: The fan unit (30) comprises: Hub (31); Mixed flow blades (32), the mixed flow blades (32) being multiple, the multiple mixed flow blades (32) being arranged at intervals along the circumference of the hub (31), and the mixed flow blades (32) being arranged at a distance from the side wall of the air duct body (21); A fan blade driving unit, the fan blade driving unit is connected to the wheel hub (31), and the fan blade driving unit can drive the wheel hub (31) to drive the mixed flow blade (32) to be rotatably arranged relative to the air duct body (21).

13. The fan assembly according to claim 12, characterized in that: The fan unit (30) further includes: A splitter blade (33), the splitter blade (33) being connected to the hub (31), the splitter blade (33) being multiple, one splitter blade (33) being arranged between adjacent mixed flow blades (32), the length of the splitter blade (33) along the vertical direction being shorter than the length of the mixed flow blade (32) along the vertical direction.

14. The fan assembly according to claim 12, characterized in that: The fan unit (30) further includes: A guide blade (34), the guide blade (34) being arranged in the second end of the air duct body (21) and connected to the side wall of the air duct body (21), the guide blade (34) being multiple, the multiple guide blades (34) being arranged at intervals along the circumference of the air duct body (21), and the multiple guide blades (34) being located above the fan part (30).

15. The fan assembly according to claim 14, characterized in that: When the first air channel portion (10) is located at the open position, part of the guide blade (34) extends into the first air channel portion (10).

16. An air conditioning cabinet, comprising a fan assembly, characterized in that: The fan assembly is the fan assembly according to any one of claims 1 to 15.

17. The air conditioning cabinet according to claim 16, characterized in that: The air conditioning cabinet comprises: A housing having an upper air outlet and a lower air outlet; The heat exchanger is arranged in the shell, and at least one fan assembly is arranged in the shell. The fan assembly can introduce the airflow outside the shell into the shell through the upper air port, exchange heat with the heat exchanger, and then discharge it outside the shell through the lower air port. Alternatively, the fan assembly can introduce the airflow outside the shell into the shell through the lower air port, exchange heat with the heat exchanger, and then discharge it outside the shell through the upper air port.

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