CN113530852A - Fan structure and air conditioning device - Google Patents

Abstract

The invention discloses a fan structure and an air conditioning device, wherein the fan structure comprises a fan blade assembly and an air inlet panel, the air inlet panel is connected with the fan blade assembly, and the air inlet panel is arranged towards an air inlet end of the fan blade assembly; the air inlet panel is arranged to move in the direction far away from the fan blade assembly so that an air inlet is formed between the air inlet end of the fan blade assembly and the air inlet panel, and the air inlet area of the air inlet is positively correlated with the distance between the air inlet panel and the air inlet end of the fan blade assembly; or an air inlet is formed between the air inlet panel and the air inlet end of the fan blade assembly, and the air inlet panel can move along the direction of expanding or contracting the air inlet relative to the fan blade assembly so as to adjust the air inlet area of the air inlet. The fan structure and the air conditioning device can avoid increasing the power consumption of equipment and the running noise of the equipment when in use, and can avoid the shaking of the machine body.

Description

Fan structure and air conditioning device

Technical Field

The invention relates to the technical field of air conditioning devices, in particular to a fan structure and an air conditioning device.

Background

The performance parameter value of the air purifier as a common air conditioning household appliance which acts by relying on airflow movement is directly determined by the air intake of a product to a great extent, so that how to efficiently improve the air intake of the product is a general conventional technical problem in the industry, and how to solve the problem has very important research value.

The conventional air purifier generally increases the intake by increasing the fan power, however, the increase of the fan power is often accompanied by the increase of negative effects such as product power consumption, running noise and machine body shake, which is not favorable for the popularization and application of the product.

Disclosure of Invention

Based on this, to traditional air purifier increase the intake through the mode that promotes fan power and cause the product big, the running noise is big and the fuselage shake appears, is unfavorable for the problem of the wide use of product, has proposed a fan structure and air conditioning equipment, this fan structure and air conditioning equipment can avoid increasing equipment consumption and equipment running noise when the increase intake when using, can also avoid the fuselage shake in addition.

The specific technical scheme is as follows:

on one hand, the application relates to a fan structure, which comprises a fan blade assembly and an air inlet panel, wherein the air inlet panel is connected to the fan blade assembly and is arranged towards an air inlet end of the fan blade assembly;

the air inlet panel is arranged to move in the direction far away from the fan blade assembly so that an air inlet is formed between the air inlet end of the fan blade assembly and the air inlet panel, and the air inlet area of the air inlet is positively correlated with the distance between the air inlet panel and the air inlet end of the fan blade assembly; or

An air inlet is formed between the air inlet panel and the air inlet end of the fan blade assembly, and the air inlet panel can move along the direction of expanding or contracting the air inlet relative to the fan blade assembly so as to adjust the air inlet area of the air inlet.

When the fan structure is used, the air inlet panel can be driven to move along the direction far away from the fan blade assembly so that an air inlet is formed between the air inlet end of the fan blade assembly and the air inlet panel, at the moment, the air enters the fan blade assembly along the air inlet from the left lower side and the right lower side of the active air suction of the fan blade assembly, and when the air inlet volume needs to be adjusted, the distance between the air inlet panel and the air inlet end of the fan blade assembly only needs to be adjusted, wherein the larger the distance between the air inlet panel and the air inlet end of the fan blade assembly is, the larger the air inlet area of the air inlet is, and the larger the air inlet volume is; or an air inlet is formed between the air inlet panel and the air inlet end of the fan blade assembly, and when the air inlet amount needs to be adjusted, the air inlet panel only needs to be driven to move relative to the fan blade assembly along the direction of expanding or reducing the air inlet; therefore, the air inlet volume can be adjusted by adjusting the air inlet area of the air inlet, so that the increase of the power consumption of equipment and the running noise of the equipment can be avoided, and the shaking of the machine body can be avoided.

The technical solution is further explained below:

in one embodiment, the fan blade assembly comprises a mounting base and a fan blade, the fan blade is connected to the mounting base, an air inlet end of the fan blade faces the air inlet panel, the air inlet panel is movably connected to the mounting base, and the air inlet end of the fan blade and the air inlet panel form the air inlet.

In one embodiment, the wind power generation device further comprises a driving mechanism, and the driving mechanism is used for driving the wind inlet panel to move relative to the fan blade assembly.

In one embodiment, the driving mechanism includes a driving member and a connecting rod, one end of the connecting rod is rotatably connected to the driving member, the other end of the connecting rod is connected to the air inlet panel, the driving member drives the connecting rod to rotate, and the connecting rod drives the air inlet panel to move relative to the mounting base.

In one embodiment, the driving member includes a motor and a crank bracket connected to the motor, and the crank bracket is rotatably connected to the connecting rod.

In one embodiment, the number of the air inlet panels is at least two, the at least two air inlet panels are distributed along the circumferential direction of the mounting base, the number of the connecting rods is at least two, the crank support comprises a mounting body connected with the motor and cranks arranged at intervals along the circumferential direction of the mounting body, and one crank is correspondingly and rotatably connected with one connecting rod.

In one embodiment, all the air inlet panels are surrounded to form an installation space with an opening, the fan blades are arranged in the installation space, and the air outlet ends of the fan blades face the opening.

In one embodiment, the mounting base is formed with a sliding groove, and the air inlet panel is formed with a sliding portion in sliding fit with the sliding groove.

In one embodiment, the sliding device further comprises a sliding block, the sliding part is connected to the sliding block, and the sliding block is in sliding fit with the sliding groove.

In one embodiment, the fan blade further comprises an annular filter element, and the annular filter element is sleeved at the air inlet end of the fan blade.

In one embodiment, the fan blade is a centrifugal fan blade.

In another aspect, the present application also relates to an air conditioning device including the fan structure in any of the foregoing embodiments.

When the air conditioning device is used, the air inlet panel can be driven to move along the direction far away from the fan blade assembly so that an air inlet is formed between the air inlet end of the fan blade assembly and the air inlet panel, at the moment, the air enters the fan blade assembly along the air inlet from the left side to the right side of the active air suction of the fan blade assembly, when the air inlet amount needs to be adjusted, the distance between the air inlet panel and the air inlet end of the fan blade assembly only needs to be adjusted, wherein the larger the distance between the air inlet panel and the air inlet end of the fan blade assembly is, the larger the air inlet area of the air inlet is, and the larger the air inlet amount is; or an air inlet is formed between the air inlet panel and the air inlet end of the fan blade assembly, and when the air inlet amount needs to be adjusted, the air inlet panel only needs to be driven to move relative to the fan blade assembly along the direction of expanding or reducing the air inlet; therefore, the air inlet volume can be adjusted by adjusting the air inlet area of the air inlet, so that the increase of the power consumption of equipment and the running noise of the equipment can be avoided, and the shaking of the machine body can be avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.

Furthermore, the drawings are not to scale of 1:1, and the relative dimensions of the various elements in the drawings are drawn only by way of example and not necessarily to true scale.

FIG. 1 is a schematic diagram of a blower structure in an embodiment in a state before starting;

FIG. 2 is a schematic diagram of a blower structure after being started according to an embodiment;

FIG. 3 is an exploded view of a fan configuration according to an embodiment;

FIG. 4 is an exploded view of the intake panel and drive mechanism of an embodiment;

FIG. 5 is a schematic view of an embodiment of a blower configuration shown in a position prior to actuation of the drive mechanism and at one of the viewing angles of the intake faceplate;

FIG. 6 is a schematic view of the blower configuration shown in an alternative view of the intake panel and the drive mechanism prior to actuation in one embodiment;

FIG. 7 is a schematic view of the blower structure shown in one embodiment in a position at which the driving mechanism and the intake panel are in one of the viewing angles after the blower structure is activated;

fig. 8 is a schematic view of the blower structure in another view angle of the driving mechanism and the air intake panel after being started according to an embodiment.

Description of reference numerals:

10. a fan structure; 100. a fan blade assembly; 110. mounting a base; 112. a chute; 120. a fan blade; 122. the air inlet end of the fan blade; 124. the air outlet end of the fan blade; 130. an air outlet grille; 200. an air intake panel; 210. a sliding part; 300. an air inlet; 400. an annular filter member; 500. a drive mechanism; 510. a drive member; 512. a motor; 514. a crank bracket; 5142. an installation body; 5144. a crank; 520. a connecting rod; 600. a slider; 700. an installation space; 710. an opening; 800. a gap.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Air conditioning devices such as air conditioners, air purifiers, and fans typically have a corresponding fan structure through which air is drawn autonomously. The performance parameter value of the air conditioning device is directly determined by the air inlet amount of the fan structure to a large extent. In a fan structure of a conventional air conditioning device, a plurality of air inlet holes are generally formed in an air inlet panel, and air is introduced into the fan along the air inlet holes through the fan. Therefore, when the air inlet volume needs to be increased, the traditional air conditioning device can only increase the power of the fan, however, when the power of the fan is increased, the air conditioning device not only has larger power consumption when in use, but also can generate the problems of noise and machine body shake, and the popularization and the application of the product are influenced

Based on this, this application has proposed a fan structure 10, and this fan structure 10 can avoid increasing equipment consumption and equipment running noise when increasing the intake when using, can avoid the fuselage shake simultaneously.

Referring to fig. 1 to 3, a fan structure 10 in an embodiment includes a fan blade assembly 100 and an air inlet panel 200, wherein the air inlet panel 200 is connected to the fan blade assembly 100, and the air inlet panel 200 is disposed toward an air inlet end of the fan blade assembly 100.

Referring to fig. 4, 5 and 7, the fan blade assembly 100 includes at least two fan blades 120 and a mounting base 110, and the number of the air inlet panels 200 is at least two, and the air inlet panels 200 are movably connected to the mounting base 110 and arranged along the circumferential direction of the mounting base 110. The at least two air inlet panels 200 are surrounded to form an installation space 700 with an opening 710, the fan blade 120 is arranged in the installation space 700, and the air outlet end 124 of the fan blade faces the opening 710, so that the fan blade 120 enters air from the circumferential direction of the fan blade and exhausts air from the axial direction. Referring to fig. 3, the fan 120 may be a centrifugal fan 120.

Referring to fig. 2 and fig. 3, in some embodiments, the fan blade assembly 100 further includes an air outlet grille 130, and the air outlet grille 130 is disposed at the air outlet end 124 of the fan blade.

Referring to fig. 2 and 3, in some embodiments, the fan structure 10 further includes an annular filter 400, and the annular filter 400 is sleeved on the air inlet end 122 of the fan blade. Thus, the wind enters the fan blades 120 after being filtered by the annular filter 400. Alternatively, the annular filter pack 400 may be an annular filter screen.

Referring to fig. 5 and 6, in some embodiments, the mounting base 110 is formed with a sliding groove 112, the air intake panel 200 is formed with a sliding portion 210, and the sliding portion 210 is in sliding fit with the sliding groove 112. So, spout 112 can play spacing and the effect of direction, and air inlet panel 200 can remove on predetermineeing the route this moment, promotes the reliability that air inlet panel 200 removed.

Referring to fig. 4 and 7, in some embodiments, the blower structure 10 further includes a slider 600, the sliding portion 210 is connected to the slider 600, and the slider 600 is slidably engaged with the sliding groove 112.

Referring to fig. 5 and 7, taking four air inlet panels 200 as an example, the mounting base 110 is a circular plate, the air inlet panels 200 are arc-shaped plates, and the four air inlet panels 200 are arranged along the circumferential direction of the mounting base 110 and surround to form a cylindrical mounting space 700.

In some embodiments, referring to fig. 1 and 5, before the fan structure 10 is started, the air inlet panel 200 covers or wraps the air inlet end of the fan blade assembly 100, so that wind cannot enter the fan blade assembly 100. Referring to fig. 2 and 7, when the fan structure 10 is started, the air inlet panel 200 is configured to move in a direction away from the fan assembly 100 so that an air inlet 300 is formed between the air inlet end of the fan assembly 100 and the air inlet panel 200, and at this time, the wind enters the fan assembly 100 along the air inlet 300 under the action of the fan assembly 100. Further, the air inlet area of the air inlet 300 is positively correlated with the distance between the air inlet panel 200 and the air inlet end of the fan blade assembly 100; in other words, when the air intake needs to be adjusted, only the distance between the air intake end of the air intake panel 200 and the air intake end of the fan blade assembly 100 needs to be adjusted, that is, the air intake panel 200 is driven to move relative to the fan blade assembly 100. Therefore, the air inlet volume can be adjusted by adjusting the air inlet area of the air inlet 300, so that the increase of the power consumption of the equipment and the running noise of the equipment can be avoided, and the shaking of the machine body can be avoided. Further, set up a plurality of fresh air inlets at the air inlet panel with traditional air conditioning equipment's fan structure, compare the scheme in the fan is drawn wind into along the fresh air inlet to the fan through the fan, in this embodiment, form air intake 300 between the air inlet end that makes fan blade assembly 100 and air inlet panel 200 through driving about air inlet panel 200 and moving along keeping away from fan blade assembly 100 direction, the air inlet area of air intake 300 is also relatively great, and then the air inlet area is also relatively great.

In other embodiments, an air inlet 300 is formed between the air inlet panel 200 and the air inlet end of the fan blade assembly 100, and when in use, under the action of the fan blade assembly 100, air enters the fan assembly along the air inlet 300; further, the intake panel 200 is configured to move relative to the fan assembly 100 in a direction of expanding or contracting the intake opening 300 to adjust an intake area of the intake opening 300. Thus, when the air inlet amount needs to be adjusted, the air inlet panel 200 only needs to be driven to move relative to the fan blade assembly 100 along the direction of expanding or contracting the air inlet 300. Therefore, the air inlet volume can be adjusted by adjusting the air inlet area of the air inlet 300, so that the increase of the power consumption of the equipment and the running noise of the equipment can be avoided, and the shaking of the machine body can be avoided.

It should be noted that, in the foregoing embodiments, the air inlet 300 is defined to form an effective air inlet area, and the air inlet area of the air inlet 300 refers to the area of the air inlet area.

Referring to fig. 3 and 4, in some embodiments, the fan structure 10 further includes a driving mechanism 500, and the driving mechanism 500 is configured to drive the air intake panel 200 to move relative to the fan assembly 100.

In some embodiments, the driving mechanism 500 may be in communication connection with a corresponding control module, and when air intake is required or air intake amount is adjusted, the control module only needs to control the driving mechanism 500 to move to drive the air intake panel 200 to correspond to the fan blade assembly 100. Wherein, the control module can be a micro control unit or a singlechip and the like.

Specifically, the driving mechanism 500 may be a telescopic driving member 510, such as a driving cylinder or a telescopic rod.

Referring to fig. 5 to 8, in some embodiments, the driving mechanism 500 includes a driving member 510 and a connecting rod 520, one end of the connecting rod 520 is rotatably connected to the driving member 510, the other end of the connecting rod 520 is connected to the air intake panel 200, the connecting rod 520 and the air intake panel 200 form a connecting rod 520 slider 600 mechanism, and when in use, the driving member 510 rotates through the driving connecting rod 520 and the connecting rod 520 drives the air intake panel 200 to move relative to the mounting base 110. Therefore, when wind needs to be introduced or the air inlet amount needs to be adjusted, only the connecting rod 520 needs to be driven to rotate within a preset range through the driving piece 510, and the adjustment reliability is relatively high.

Referring to fig. 4 and 5, in some embodiments, the driving member 510 includes a motor 512 and a crank bracket 514 connected to the motor 512, wherein the crank bracket 514 is rotatably connected to the connecting rod 520. Thus, the crank bracket 514, the connecting rod 520 and the air inlet panel 200 form a slider 600 mechanism of the crank 5144, and when the wind-powered wind-driven generator is used, the air inlet panel 200 is controlled to move in a direction close to or far away from the air inlet end 122 of the wind blade through the forward and reverse rotation of the motor 512.

Referring to fig. 5, in some embodiments, the number of the air intake panels 200 is at least two, at least two air intake panels 200 are arranged along the circumference of the mounting base 110, the number of the connecting rods 520 is at least two, the crank bracket 514 includes a mounting body 5142 connected to the motor 512 and cranks 5144 spaced along the circumference of the mounting body 5142, and one crank 5144 is rotatably connected to one connecting rod 520. Thus, when the motor 512 operates, the crank 5144 and the connecting rod 520 can drive at least two air inlet panels 200 to move simultaneously.

Referring to fig. 5 and 7, taking four air intake panels 200 as an example, in this embodiment, four cranks 5144 are disposed on the mounting body 5142 at equal intervals along the circumferential direction of the mounting body 5142, the mounting base 110 is a circular plate, the air intake panels 200 are arc-shaped plates, and the four air intake panels 200 are disposed along the circumferential direction of the mounting base 110. Referring to fig. 1 and 5, when the four intake panels 200 contact each other, a cylindrical installation space 700 is exactly defined, and the size of the installation space 700 is matched with that of the fan assembly. Referring to fig. 2 and 7, when the fan structure 10 is started, the four air inlet panels 200 are driven to move in a direction away from the mounting base 110 under the action of the motor 512, the air inlets 300 are formed between the air inlet panels 200 and the fan blades 120 at intervals, and as the air inlet panels 200 are continuously away from the fan blades 120, the air inlets 300 are continuously increased, and at this time, the corresponding air inlet amount is also continuously increased. When the air inlet amount needs to be reduced, only the motor 512 needs to be driven to rotate reversely, and at the moment, the air inlet panel 200 is driven to move along the direction close to the mounting base 110, and the air inlet 300 is reduced.

It should be noted that, when two adjacent air inlet panels 200 are moved to be spaced apart from each other, the gap 800 formed between the two adjacent air inlet panels 200 may also supply air.

Furthermore, the present application relates to an air conditioning device comprising a fan arrangement 10 according to any of the embodiments described above.

The air conditioning device includes the fan structure 10 in any of the embodiments, so when the air conditioning device is used, the air intake panel 200 is driven to move in the direction away from the fan blade assembly 100, so that the air intake 300 is formed between the air intake end of the fan blade assembly 100 and the air intake panel 200, at this time, the active air intake of the fan blade assembly 100 enters the fan blade assembly 100 along the air intake 300 at left and right lower sides, when the air intake amount needs to be adjusted, only the distance between the air intake end of the fan blade assembly 100 and the air intake panel 200 needs to be adjusted, wherein the larger the distance between the air intake end of the fan blade assembly 100 and the air intake panel 200 is, the larger the air intake area of the air intake 300 corresponds to the larger air intake amount; or when the air inlet amount needs to be adjusted, the air inlet panel 200 is driven to move along the direction of expanding or contracting the air inlet 300 relative to the fan blade assembly 100; therefore, the air inlet volume can be adjusted by adjusting the air inlet area of the air inlet 300, so that the increase of the power consumption of the equipment and the running noise of the equipment can be avoided, and the shaking of the machine body can be avoided.

The air conditioning device in the foregoing embodiment may be: air conditioners, air purifiers, fans, and the like can adjust the temperature or quality of air.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. A fan structure, comprising:

a fan blade assembly, and

the air inlet panel is connected to the fan blade assembly and is arranged towards the air inlet end of the fan blade assembly;

the air inlet panel is arranged to move in the direction far away from the fan blade assembly so that an air inlet is formed between the air inlet end of the fan blade assembly and the air inlet panel, and the air inlet area of the air inlet is positively correlated with the distance between the air inlet panel and the air inlet end of the fan blade assembly; or

An air inlet is formed between the air inlet panel and the air inlet end of the fan blade assembly, and the air inlet panel can move along the direction of expanding or contracting the air inlet relative to the fan blade assembly so as to adjust the air inlet area of the air inlet.

2. The fan structure according to claim 1, wherein the fan assembly includes a mounting base and a fan blade, the fan blade is connected to the mounting base, an air inlet end of the fan blade faces the air inlet panel, the air inlet panel is movably connected to the mounting base, and the air inlet end of the fan blade and the air inlet panel form the air inlet.

3. The fan structure according to claim 2, further comprising a driving mechanism for driving the air intake panel to move relative to the fan blade assembly.

4. The fan structure according to claim 3, wherein the driving mechanism includes a driving member and a connecting rod, one end of the connecting rod is rotatably connected to the driving member, the other end of the connecting rod is connected to the air inlet panel, the driving member drives the connecting rod to rotate, and the connecting rod drives the air inlet panel to move relative to the mounting base.

5. The fan structure of claim 4, wherein the drive member includes a motor and a crank bracket coupled to the motor, the crank bracket being rotatably coupled to the link.

6. The fan structure according to claim 5, wherein the number of the air inlet panels is at least two, the at least two air inlet panels are arranged along the circumferential direction of the mounting base, the number of the connecting rods is at least two, the crank bracket comprises a mounting body connected with the motor and cranks arranged at intervals along the circumferential direction of the mounting body, and one crank is rotatably connected with one connecting rod correspondingly.

7. The fan structure according to claim 6, wherein all the air inlet panels are surrounded to form an installation space with an opening, the fan blades are arranged in the installation space, and the air outlet ends of the fan blades face the opening.

8. The fan structure according to claim 2, wherein the mounting base is formed with a sliding groove, and the air intake panel is formed with a sliding portion that is in sliding engagement with the sliding groove.

9. The fan structure of claim 8 further comprising a slider, wherein the sliding portion is connected to the slider, and wherein the slider is in sliding engagement with the chute.

10. The fan structure according to any one of claims 1 to 9, further comprising an annular filter member, wherein the annular filter member is sleeved on the air inlet end of the fan blade.

11. The fan structure according to any one of claims 1 to 9, wherein the fan blade is a centrifugal fan blade.

12. An air conditioning unit, characterized by comprising a fan structure according to any one of claims 1 to 11.

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