CN210509739U - Fan assembly and cabinet air conditioner with same - Google Patents

Abstract

The utility model provides a fan subassembly and have its cabinet air conditioner. The fan assembly comprises a first air duct part; the second air channel part and the first air channel part can enclose a ventilation channel; the fan part is arranged in the ventilation channel; and the air channel switching mechanism is connected with at least one of the first air channel part and the second air channel part, and one of the first air channel part and the second air channel part can be provided with an opening position for opening the ventilation channel and a closing position for closing the ventilation channel. The setting can make the fan subassembly realize multiple air-out mode like this, can reduce the amount of wind loss of this fan subassembly simultaneously. The air outlet efficiency of the cabinet air conditioner with the fan assembly is improved, and the use experience of a user is increased.

Description

Fan assembly and cabinet air conditioner with same

Technical Field

The utility model relates to an air conditioning equipment technical field particularly, relates to a fan subassembly and have its cabinet air conditioner.

Background

The existing air-conditioning products are widely used, and the fan blades respectively comprise three types of centrifugal fan blades, cross-flow fan blades and axial-flow fan blades, various fan blades respectively have different effects, the requirements of different air-conditioning product developments are met, and different fan blade forms are configured to meet the machine type development for different use requirements and different air inlet and outlet mode requirements. The mixed flow fan blade used in the prior art has a complex structure, a single air outlet mode and large air volume loss, and causes the problem of poor user experience.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a fan subassembly and have its cabinet air conditioner to solve the big problem of mixed flow fan amount of wind loss among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a fan assembly, including: a first air duct portion; the second air channel part and the first air channel part can enclose a ventilation channel; the fan part is arranged in the ventilation channel; and the air channel switching mechanism is connected with at least one of the first air channel part and the second air channel part, and one of the first air channel part and the second air channel part can be provided with an opening position for opening the ventilation channel and a closing position for closing the ventilation channel.

Further, when one of the first air channel portion and the second air channel portion is located at the closed position, the first air channel portion and the second air channel portion are arranged far away, and when one of the first air channel portion and the second air channel portion is located at the open position, the first air channel portion and the second air channel portion are connected to enclose a sealed ventilation channel.

Furthermore, the air duct switching mechanism is connected with the first air duct part, the first air duct part is provided with an opening position and a closing position, the first air duct part comprises a plurality of annular air duct sections, and the annular air duct sections are sequentially movably connected along the axis direction of the second air duct part; and one of the annular air duct sections which is farthest away from the second air duct part is connected with the installation foundation, and the other annular air duct section which is closest to the second air duct part is connected with the air duct switching mechanism.

Further, the plurality of annular duct segments comprises: the first end of the first component section is connected with the installation foundation; a second component section, a first end of the second component section being connected to a second end of the first component section; a third component section, wherein the first end of the third component section is connected with the second end of the second component section; and the air channel switching mechanism can drive the fourth assembly section to move upwards along the vertical direction and sequentially drive the third assembly section and the second assembly section to move to a closed position, or can drive the fourth assembly section to move downwards along the vertical direction and drive the third assembly section and the second assembly section to move to an open position.

Furthermore, a rack along the vertical direction is arranged on the outer surface of the fourth component section, the air duct switching mechanism comprises a driving part, and a gear meshed with the rack is arranged at the output end of the driving part.

Furthermore, a first stop boss is arranged on the outer peripheral surface of the second end of the first assembly section, a first sealing boss matched with the first stop boss is arranged on the inner peripheral surface of the first end of the second assembly section, and/or a second stop boss is arranged on the outer peripheral surface of the second end of the second assembly section, a second sealing boss matched with the second stop boss is arranged on the inner peripheral surface of the first end of the third assembly section, a third stop boss is arranged on the outer peripheral surface of the second end of the third assembly section, and a third sealing boss matched with the third stop boss is arranged on the inner peripheral surface of the first end of the fourth assembly section.

Further, the outer peripheral surface of the first end of the second component is provided with a first limiting member for limiting the third component, and/or the outer peripheral surface of the first end of the third component is provided with a second limiting member for limiting the fourth component.

Further, when the first air duct portion is in the closed position, the third component section is located in the fourth component section, the second component section is located in the third component section, and the first component section is located in the second component section.

Further, the fourth component section, the third component section, the second component section, and the first component section are arranged such that inner diameters thereof are sequentially reduced.

Further, the installation base includes: the first end of the first assembly section is connected with the support frame assembly, the air channel switching mechanism is installed on the support frame assembly and is connected with the fourth assembly section, and a first through hole for the fourth assembly section, the third assembly section and the second assembly section to pass through is formed in the middle of the support frame assembly.

Further, the support bracket assembly includes: the middle part of the air duct fixing frame is provided with a second through hole, and the first composition section is connected with the air duct fixing frame; the supporting frame is connected with the air duct fixing frame, a first through hole is formed in the supporting frame, the upper surface of the supporting frame and the lower surface of the air duct fixing frame are arranged at a distance, and when the first air duct portion is located at the closing position, the end face of the second end of the fourth component section is flush with the lower surface of the supporting frame.

Further, the second air channel portion includes: the air duct body, the diameter of the first end of air duct body to the second end of air duct body sets up with reducing gradually, and fan portion sets up in the first end of air duct body.

Further, the fan portion includes: a hub; the mixed flow blades are arranged at intervals along the circumferential direction of the hub, and are arranged at intervals from the side wall of the air duct body; the fan blade driving part is connected with the hub and can drive the hub to drive the mixed flow blades to be rotationally arranged relative to the air duct body.

Further, the fan portion still includes: the splitter blade, splitter blade is connected with wheel hub, and splitter blade is a plurality of, is provided with a splitter blade between the adjacent mixed flow blade, and splitter blade's length along vertical direction is less than mixed flow blade's length along vertical direction.

Further, the fan portion still includes: guide vanes, guide vanes set up in the second end of wind channel body and are connected with the lateral wall of wind channel body, guide vanes are a plurality of, and a plurality of guide vanes set up along the circumference interval ground of wind channel body, and a plurality of guide vanes all are located the top of fan portion.

Further, when the first air channel portion is located at the open position, part of the guide vanes extend into the first air channel portion.

Furthermore, the inner diameter of at least one of the annular air duct sections is of a gradual change structure, and the inner diameter of the other annular air duct section is of an equal diameter structure.

According to the utility model discloses an on the other hand provides a cabinet air conditioner, including the fan subassembly, the fan subassembly is foretell fan subassembly.

Further, the cabinet air conditioner includes: the shell is provided with an upper air inlet and a lower air inlet; the heat exchanger, the heat exchanger sets up in the casing, is provided with at least one fan subassembly in the casing, and the fan subassembly can be with the air current that lies in outside the casing through last wind gap introduction casing in with the heat exchanger carry out the heat exchange after, outside the shell is discharged to the rethread wind gap, and perhaps, the fan subassembly can be with the air current that lies in outside the shell through the wind gap introduction casing down in with the heat exchanger carry out the heat exchange after, outside the shell is discharged to the rethread wind gap.

Use the technical scheme of the utility model, set up first wind channel portion and second wind channel portion in the fan subassembly to make first wind channel portion and second wind channel portion can enclose and establish into the ventilation passageway, and through setting up wind channel switching mechanism, control wind channel switching mechanism is in order to realize opening or closing of ventilation passageway. The setting can make the fan subassembly realize multiple air-out mode like this, can reduce the amount of wind loss of this fan subassembly simultaneously. The air outlet efficiency of the cabinet air conditioner with the fan assembly is improved, and the use experience of a user is increased.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a first embodiment of a fan section according to the invention;

fig. 2 shows a schematic structural view of a second embodiment of a fan section according to the invention;

figure 3 shows a schematic structural view of a first embodiment of a fan assembly according to the present invention;

FIG. 4 shows a schematic cross-sectional structural view of a second embodiment of a fan assembly according to the present invention;

figure 5 shows a schematic structural view of a third embodiment of a fan assembly according to the present invention;

figure 6 shows a schematic cross-sectional view of a fourth embodiment of a fan assembly according to the present invention;

figure 7 shows a schematic cross-sectional view of a fifth embodiment of a fan assembly according to the present invention;

fig. 8 shows an exploded view of a sixth embodiment of a fan assembly according to the present invention.

Wherein the figures include the following reference numerals:

10. a first air duct portion;

11. a first composition segment; 111. a first stop boss;

12. a second composition segment; 121. a first seal boss; 122. a second stop boss; 123. a first limit piece;

13. a third group of segments; 131. a second seal boss; 132. a third stop boss; 133. a second limiting member;

14. a fourth component section; 141. a rack; 142. a third seal boss;

20. a second air duct portion; 21. an air duct body;

30. a fan section; 31. a hub; 32. a mixed flow blade; 33. a splitter blade; 34. a guide vane;

40. an air duct switching mechanism; 41. a gear;

50. a support frame assembly; 51. an air duct fixing frame; 52. a support frame;

61. a first through hole; 62. a second via.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 1 to 8, according to an embodiment of the present invention, a fan assembly is provided.

Specifically, as shown in fig. 1 to 3, 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 channel portion 20 and the first air channel portion 10 may be enclosed as a ventilation channel. The fan portion 30 is provided in the ventilation passage. The air duct switching mechanism 40 is connected to at least one of the first air duct portion 10 and the second air duct portion 20. One of the first air channel portion 10 and the second air channel portion 20 may have an open position in which the ventilation passage is opened and a closed position in which the ventilation passage is closed by the air channel switching mechanism 40.

In this embodiment, the first air duct portion and the second air duct portion are disposed in the fan assembly, the first air duct portion and the second air duct portion can be enclosed to form a ventilation channel, and the air duct switching mechanism is controlled to open or close the ventilation channel by disposing the air duct switching mechanism. The setting can make the fan subassembly realize multiple air-out mode like this, can reduce the amount of wind loss of this fan subassembly simultaneously. The air outlet efficiency of the cabinet air conditioner with the fan assembly is improved, and the use experience of a user is increased.

When one of the first air channel portion 10 and the second air channel portion 20 is located at the closed position, the first air channel portion 10 and the second air channel portion 20 are disposed away from each other, at this time, the first air channel portion 10 and the second air channel portion 20 are disconnected, and when one of the first air channel portion 10 and the second air channel portion 20 is located at the open position, the first air channel portion 10 and the second air channel portion 20 are connected to enclose a sealed ventilation channel. The opening and closing of the ventilation channel surrounded by the first air channel part 10 and the second air channel part 20 can be realized by controlling the mutual distance between the first air channel part 10 and the second air channel part 20, and the practicability and the reliability of the fan assembly are effectively improved.

Specifically, the air duct switching mechanism 40 is connected to the first air duct portion 10. First wind channel portion 10 has open position and closed position, and first wind channel portion 10 includes a plurality of annular wind channel sections, and a plurality of annular wind channel sections are connected movably in proper order along the axis direction of second wind channel portion 20. One of the annular air duct sections which is farthest from the second air duct portion 20 is connected to the installation base, and the other one of the annular air duct sections which is closest to the second air duct portion 20 is connected to the air duct switching mechanism 40. This arrangement can improve the flexibility of the first air channel portion 10, so that the specific structure of the first air channel portion 10 can be changed by setting the structure of each annular air channel segment. And meanwhile, the required installation space of the fan assembly can be reduced.

As shown in fig. 3, the plurality of annular duct segments includes a first constituent segment 11, a second constituent segment 12, a third constituent segment 13, and a fourth constituent segment 14. The first end of the first component section 11 is connected to a mounting base. The first end of the second constituent segment 12 is connected to the second end of the first constituent segment 11. The first end of the third constituent segment 13 is connected to the second end of the second constituent segment 12. A first end of the fourth constituent segment 14 is connected to a second end of the third constituent segment 13. A second end of the fourth constituent segment 14 is connected to the second air channel portion 20. The air duct switching mechanism 40 is connected to the outer surface of the fourth component section 14, and the air duct switching mechanism 40 can drive the fourth component section 14 to move upward along the vertical direction and sequentially drive the third component section 13 and the second component section 12 to move to the closed position. The air duct switching mechanism 40 can also drive the fourth component section 14 to move downward in the vertical direction and drive the third and second component sections 13 and 12 to move to the open position. This arrangement effectively improves the reliability of the connection or disconnection of the first air channel portion 10 and the second air channel portion 20.

Wherein, a rack 141 along the vertical direction is arranged on the outer surface of the fourth component section 14, the air duct switching mechanism 40 comprises a driving part, and the output end of the driving part is provided with a gear 41 engaged with the rack 141. The arrangement enables the driving mechanism to be simple in structure and reliable in operation.

As shown in fig. 4 and 7, a first stopper boss 111 is provided on an outer circumferential surface of the second end of the first constituent segment 11. The inner circumferential surface of the first end of the second constituent segment 12 is provided with a first sealing boss 121 which is engaged with the first stopper boss 111. A second stopping boss 122 is provided on the outer peripheral surface of the second end of the second constituent segment 12. A second sealing boss 131 matched with the second stopping boss 122 is provided on the inner circumferential surface of the first end of the third constituent segment 13. The outer peripheral surface of the second end of the third constituent segment 13 is provided with a third stopper boss 132. The inner peripheral surface of the first end of the fourth constituent segment 14 is provided with a third sealing boss 142 that is fitted with the third stopper boss 132. The arrangement can ensure that the adjacent component sections can be smoothly moved to the opening position and the closing position, and when the component sections are positioned at the closing position, the sealing property between the adjacent component sections is improved.

As shown in fig. 8, the outer peripheral surface of the first end of the second constituent segment 12 is provided with a first stopper 123 for restricting the third constituent segment 13. The outer peripheral surface of the first end of the third constituent segment 13 is provided with a second stopper 133 for restricting the fourth constituent segment 14. The arrangement is such that when the fourth component 14 moves upward along the vertical direction and abuts against the second stop element 133, the third component 13 can be continuously driven to move, and when the fourth component is further abutted against the first stop element 123, the second component 12 is driven to the closed position.

When the first duct portion 10 is located at the closed position, the third component section 13 is located in the fourth component section 14, the second component section 12 is located in the third component section 13, and the first component section 11 is located in the second component section 12. This arrangement can reduce the occupied space of the first air channel portion 10 when it is located at the closed position.

The fourth constituent segment 14, the third constituent segment 13, the second constituent segment 12, and the first constituent segment 11 are arranged such that inner diameters thereof decrease in this order. Set up like this and to enclose the structure that the wind channel inside that establishes gradually is the shrink form along vertical direction between can making up the section, improved the efficiency of carrying on of fan subassembly.

As shown in fig. 3 and 4, the mounting base includes a support bracket assembly 50. The first end of the first assembly 11 is connected to the supporting frame assembly 50, the air duct switching mechanism 40 is mounted on the supporting frame assembly 50 and connected to the fourth assembly 14, and the middle of the supporting frame assembly 50 is provided with a first through hole 61 for the fourth assembly 14, the third assembly 13 and the second assembly 12 to pass through. This arrangement can improve the stability of the installation of the first air channel portion 10.

Specifically, the support bracket assembly 50 includes an air duct mount 51 and a support bracket 52. The middle of the air duct fixing frame 51 is provided with a second through hole 62. The first component section 11 is connected to the air duct fixing frame 51. The supporting frame 52 is connected with the air duct fixing frame 51, and a first through hole 61 is formed on the supporting frame 52. The upper surface of the supporting frame 52 is spaced from the lower surface of the air duct fixing frame 51. When the first air channel portion 10 is located at the closed position, the end surface of the second end of the fourth constituent segment 14 is flush with the lower surface of the support bracket 52. This arrangement can prevent the end of the first air channel portion 10 from interfering with the tips of other moving parts.

The second air channel portion 20 includes a channel body 21. The diameter of the first end of the air duct body 21 to the second end of the air duct body 21 is gradually reduced, and the fan portion 30 is disposed in the first end of the air duct body 21. The fan section 30 includes a hub 31, mixed flow blades 32, and a blade drive section. The mixed flow blade 32 is plural, and the plural mixed flow blades 32 are provided at intervals in the circumferential direction of the hub 31. The mixing vanes 32 are disposed at a distance from the side wall of the duct body 21. The fan driving portion is connected to the hub 31, and the fan driving portion can drive the hub 31 to drive the mixed flow blades 32 to rotate relative to the air duct body 21. Set up like this and can improve fan assembly's air-out efficiency.

Further, in order to further improve the air outlet efficiency of the fan assembly, the fan portion 30 further includes a splitter blade 33 and a guide blade 34. The splitter blade 33 is connected with the hub 31, the splitter blade 33 is multiple, one splitter blade 33 is arranged between adjacent mixed flow blades 32, and the length of the splitter blade 33 in the vertical direction is smaller than that of the mixed flow blades 32 in 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, the plurality of guide vanes 34 are disposed at intervals along the circumferential direction of the air duct body 21, and the plurality of guide vanes 34 are all located above the fan portion 30. When the first air channel portion 10 is located at the open position, part of the guide vanes 34 extend into the first air channel portion 10.

The inner diameter of at least one of the annular air duct sections is of a gradual change structure, and the inner diameter of the other annular air duct section is of an equal diameter structure. The setting can play the effect that can improve the efficiency of carrying on of fan subassembly and air-out efficiency like this.

Fan subassembly in above-mentioned embodiment can also be used to air conditioning equipment technical field, promptly according to the utility model discloses an on the other hand provides a cabinet air conditioner. The cabinet air conditioner comprises a fan assembly. The fan assembly is the fan assembly in the above embodiments. Specifically, the cabinet air conditioner comprises a shell and a heat exchanger. The shell is provided with an upper air inlet and a lower air inlet. The heat exchanger sets up in the casing, is provided with at least one fan subassembly in the casing, and the fan subassembly can be with the air current that lies in outside the casing through last wind gap introduce in the casing carry out the heat exchange with the heat exchanger after, outside the rethread wind gap discharge casing. The fan assembly can also introduce airflow outside the shell into the shell through the lower air inlet to exchange heat with the heat exchanger and then discharge the airflow outside the shell through the upper air inlet.

Specifically, the cabinet air conditioner adopts a special blade-shaped mixed flow fan, and a drum-shaped upper air outlet switching mechanism scheme of an upper and lower reversible air outlet duct can be realized. On the basis of the mixed flow fan blade, the effect of up-and-down convection air outlet is realized by utilizing the matching of different air channels, in order to realize the application on the air conditioner shell, a motion mechanism is designed on an air channel assembly, the switching mechanism of an air outlet air channel on a drum shape is realized, and the opening and the closing of the drum-shaped air channel are realized by utilizing a first air channel part mechanism which drives the annular foldable telescopic structure by a gear.

The fan blades can be divided into two types, one is a basic fan blade impeller, and the other is that on the basis of 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 requirements of rectifying or increasing a working surface. The fan blade has the effect of axial flow acting air outlet and the effect of centrifugal fan blade, and can realize the requirement of upper and lower air outlet by matching with two air channels, wherein the difference of the two air channels is that the opening at the upper end of the fan blade is drum-shaped or necking, when the opening is drum-shaped, the air outlet can be upward air outlet, and when the opening is necking, the air outlet can be downward air outlet.

Wherein the air duct part, the mixed flow fan blade, the fan blade motor and the support frame are in a shared structure with the necking air duct, the difference components of the annular air duct switching mechanism are mainly arranged on an air duct fixing frame, an annular air duct framework (comprising a first component section, a second component section, a third component section and a fourth component section) and a mechanism switching motor, the common body is a fixed structure and is fixed with the main shell of the air conditioner, the rest of the air duct fixing frames, the annular air duct frameworks and the motor of the switching mechanism are fixed on the air duct fixing frames, the air duct fixing frame is fixed with one of the annular air duct frameworks, the other frameworks are sequentially accumulated one by one on the basis through an up-down telescopic mechanism, the air duct body is closed, sealing is achieved through motor pre-tightening of the switching mechanism, the framework is connected with the frame in a reverse mode, namely a stopping portion is sealed and disconnected, overall sealing is achieved, and parts are matched to achieve the effect of driving the air duct to exhaust air upwards. When need close the air-out, rack up motion on the motor rotation drive wind channel skeleton of switching mechanism, the top edge of next skeleton is when locating part looks butt with the spacing buckle of last one, then last skeleton and last skeleton connection an organic whole continue up the motion, when the spacing buckle of another skeleton is reachd in the same principle, because should be as an organic whole with the skeleton connection, then 3 parts together continue the motion up, the skeleton of the top is fixed with the wind channel mount, when 3 parts continue up the motion under motor drive, exceed the lower terminal surface of mount, then can realize the effect of closing of wind channel.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (19)

1. A fan assembly, comprising:

a first duct portion (10);

the second air channel part (20) and the first air channel part (10) can enclose a ventilation channel;

a fan portion (30), the fan portion (30) being disposed within the ventilation channel;

and the air duct switching mechanism (40), the air duct switching mechanism (40) is connected with at least one of the first air duct portion (10) and the second air duct portion (20), and one of the first air duct portion (10) and the second air duct portion (20) can be provided with an opening position for opening the ventilation channel and a closing position for closing the ventilation channel through the air duct switching mechanism (40).

2. The fan assembly according to claim 1, wherein the first air channel portion (10) is located remotely from the second air channel portion (20) when one of the first air channel portion (10) and the second air channel portion (20) is in the closed position, and wherein the first air channel portion (10) is connected to the second air channel portion (20) to enclose the ventilation channel which is sealed when one of the first air channel portion (10) and the second air channel portion (20) is in the open position.

3. The fan assembly according to claim 1 or 2, wherein the air duct switching mechanism (40) is connected to the first air duct portion (10), the first air duct portion (10) having the open position and the closed position, the first air duct portion (10) comprising a plurality of annular air duct segments, which are movably connected in sequence in an axial direction of the second air duct portion (20);

the annular air duct section which is farthest away from the second air duct portion (20) in the annular air duct sections is connected with an installation foundation, and the annular air duct section which is closest to the second air duct portion (20) in the annular air duct sections is connected with the air duct switching mechanism (40).

4. The fan assembly of claim 3, wherein the plurality of annular duct segments comprises:

a first component section (11), a first end of the first component section (11) being connected to the mounting base;

a second component section (12), a first end of the second component section (12) being connected to a second end of the first component section (11);

a third component (13), a first end of the third component (13) being connected to a second end of the second component (12);

a fourth assembly section (14), a first end of the fourth assembly section (14) is connected to a second end of the third assembly section (13), a second end of the fourth assembly section (14) is connected to the second air duct portion (20), the air duct switching mechanism (40) is connected to an outer surface of the fourth assembly section (14), the air duct switching mechanism (40) can drive the fourth assembly section (14) to move upward along a vertical direction and sequentially drive the third assembly section (13) and the second assembly section (12) to move to the closed position, or the air duct switching mechanism (40) can drive the fourth assembly section (14) to move downward along the vertical direction and drive the third assembly section (13) and the second assembly section (12) to move to the open position.

5. The fan assembly according to claim 4, wherein a rack (141) is disposed on an outer surface of the fourth component (14) in a vertical direction, and the air duct switching mechanism (40) comprises a driving portion, and an output end of the driving portion is provided with a gear (41) engaged with the rack (141).

6. The fan assembly of claim 4,

a first stopping boss (111) is arranged on the outer peripheral surface of the second end of the first component section (11), a first sealing boss (121) matched with the first stopping boss (111) is arranged on the inner peripheral surface of the first end of the second component section (12), and/or a first sealing boss (121) matched with the first stopping boss (111) is arranged on the inner peripheral surface of the first end of the second component section (12)

A second stop boss (122) is arranged on the outer peripheral surface of the second end of the second assembly section (12), a second sealing boss (131) matched with the second stop boss (122) is arranged on the inner peripheral surface of the first end of the third assembly section (13), a third stop boss (132) is arranged on the outer peripheral surface of the second end of the third assembly section (13), and a third sealing boss (142) matched with the third stop boss (132) is arranged on the inner peripheral surface of the first end of the fourth assembly section (14).

7. The fan assembly of claim 4,

the outer peripheral surface of the first end of the second component (12) is provided with a first limiting piece (123) for limiting the third component (13), and/or

The outer peripheral surface of the first end of the third component (13) is provided with a second limiting piece (133) for limiting the fourth component (14).

8. The fan assembly according to claim 4, wherein the third component section (13) is located within the fourth component section (14), the second component section (12) is located within the third component section (13), and the first component section (11) is located within the second component section (12) when the first duct portion (10) is in the closed position.

9. The fan assembly according to claim 4, characterized in that the fourth constituent segment (14), the third constituent segment (13), the second constituent segment (12) and the first constituent segment (11) are arranged with decreasing inner diameters in the order named.

10. The fan assembly of claim 4, wherein the mounting base comprises:

the first end of the first assembly section (11) is connected with the support frame assembly (50), the air duct switching mechanism (40) is installed on the support frame assembly (50) and is connected with the fourth assembly section (14), and a first through hole (61) for the fourth assembly section (14), the third assembly section (13) and the second assembly section (12) to pass through is formed in the middle of the support frame assembly (50).

11. The fan assembly of claim 10, wherein the support frame assembly (50) comprises:

the air duct fixing frame (51), a second through hole (62) is arranged in the middle of the air duct fixing frame (51), and the first component section (11) is connected with the air duct fixing frame (51);

support frame (52), support frame (52) with wind channel mount (51) are connected, seted up on support frame (52) first through-hole (61), the upper surface of support frame (52) with set up apart from having between the lower surface of wind channel mount (51), work as first wind channel portion (10) are located when the closed position, the terminal surface of the second end of fourth component (14) with the lower surface looks parallel and level of support frame (52).

12. The fan assembly according to claim 1, wherein the second air channel portion (20) comprises:

the air duct comprises an air duct body (21), the diameter of the first end of the air duct body (21) to the diameter of the second end of the air duct body (21) is gradually reduced, and a fan portion (30) is arranged in the first end of the air duct body (21).

13. The fan assembly of claim 12, wherein the fan section (30) comprises:

a hub (31);

the mixed flow blades (32) are arranged in a plurality of numbers, the mixed flow blades (32) are arranged at intervals along the circumferential direction of the hub (31), and the mixed flow blades (32) are arranged at a distance from the side wall of the air duct body (21);

the fan blade driving part is connected with the hub (31), and the fan blade driving part can drive the hub (31) to drive the mixed flow blades (32) to be rotationally arranged relative to the air duct body (21).

14. The fan assembly of claim 13, wherein the fan section (30) further comprises:

splitter blade (33), splitter blade (33) with wheel hub (31) are connected, splitter blade (33) are a plurality of, and are adjacent be provided with one between mixed flow blade (32) splitter blade (33), the length of the vertical direction of edge of splitter blade (33) is less than the length of the vertical direction of edge of mixed flow blade (32).

15. The fan assembly of claim 13, wherein the fan section (30) further comprises:

guide vane (34), guide vane (34) set up in the second end of wind channel body (21) and with the lateral wall of wind channel body (21) is connected, guide vane (34) are a plurality of, and are a plurality of guide vane (34) are followed the circumference interval ground of wind channel body (21) sets up, and is a plurality of guide vane (34) all are located the top of fan portion (30).

16. The fan assembly of claim 15 wherein a portion of the guide vanes (34) extend into the first air channel portion (10) when the first air channel portion (10) is in the open position.

17. The fan assembly of claim 3, wherein an inner diameter of at least one of the plurality of annular air duct sections is of a gradual change configuration and an inner diameter of another of the annular air duct sections is of a constant diameter configuration.

18. A cabinet air conditioner including a fan assembly, wherein the fan assembly is as claimed in any one of claims 1 to 17.

19. A cabinet air conditioner according to claim 18, including:

a housing having an upper air inlet and a lower air inlet;

the heat exchanger is arranged in the shell, at least one fan assembly is arranged in the shell, the fan assembly can introduce airflow outside the shell through the upper air inlet into the shell to exchange heat with the heat exchanger and then discharge the airflow through the lower air inlet out of the shell, or the fan assembly can introduce airflow outside the shell through the lower air inlet into the shell to exchange heat with the heat exchanger and then discharge the airflow through the upper air inlet out of the shell.

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