Self-cleaning centrifugal fans, air conditioning systems and vehicles

Abstract

This invention discloses a self-cleaning centrifugal blower, an air conditioning system, and a vehicle, relating to the field of blower technology. The self-cleaning centrifugal blower includes a casing, an impeller assembly, a cleaning component, and a drive mechanism. The casing has an air inlet and an air outlet. The impeller assembly includes a disc and multiple blades. The disc is rotatably disposed within the casing. The air inlet is located on one side of the disc's axial direction, and the air outlet is located on one side of the disc's circumference. Each blade is connected to the disc on the side facing the air inlet and is arranged at intervals around the disc's axis. The cleaning component is movable along the disc's axial direction and contacts the circumferential surface of each blade at a predetermined length. The drive mechanism is disposed on the casing and is used to drive the cleaning component to move, thereby scraping off deposits on each blade. The self-cleaning centrifugal blower provided by this invention can scrape off deposits on the blades, thus ensuring airflow and significantly reducing the frequency of subsequent cleaning and maintenance.

Description

Technical Field

[0001] This invention belongs to the field of fan technology, specifically a self-cleaning centrifugal fan, an air conditioning system, and a vehicle. Background Technology

[0002] In a vehicle's air conditioning system, the cooling or heating energy on the evaporator usually needs to be forcibly delivered to the vehicle interior by a fan (also called an evaporator fan) to achieve cooling or heating inside the vehicle.

[0003] Currently, most fans used in evaporators are centrifugal fans, which generally consist of a DC motor, a fan impeller, and a casing. The DC motor drives the fan impeller to rotate, thereby delivering air. However, after prolonged operation, dust or lint easily accumulates on the fan impeller, especially on the inner side of the blades, significantly reducing the air volume and affecting the user experience. This problem urgently needs to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a self-cleaning centrifugal blower, air conditioning system and vehicle, so as to at least solve the problem that existing evaporative blowers easily accumulate dust or flocculent matter on the blades after long-term operation, thus reducing the air volume.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a self-cleaning centrifugal blower, comprising:

[0007] The casing has an air inlet and an air outlet.

[0008] The impeller assembly includes a disc and multiple blades. The disc is rotatably mounted inside the housing. The air inlet is located on one side of the disc along the axial direction, and the air outlet is located on one side of the disc in the circumferential direction. Each blade is connected to the disc on the side facing the air inlet and is arranged at intervals around the disc axis.

[0009] The cleaning component is arranged to move along the axial direction of the wheel and to contact the circumferential surface of a preset length segment on each blade.

[0010] A drive mechanism, mounted on the housing, is used to drive the cleaning components to scrape off the deposits on each blade.

[0011] As a further embodiment of the present invention, the cleaning component includes a cleaning disc having through holes that match each blade, and each through hole slidingly engaging with each blade.

[0012] As a further embodiment of the present invention, the cleaning assembly also includes a plurality of cleaning sleeves, each cleaning sleeve being inserted into a corresponding through hole;

[0013] Each cleaning sleeve has a preset gap with each through hole, and each cleaning sleeve slides with each blade.

[0014] As a further embodiment of the present invention, each cleaning sleeve has a scraping part on the side facing the air inlet that is transitionally connected to the corresponding blade.

[0015] And / or, each cleaning sleeve has an inner hole that mates with each blade, and the cross-section of each inner hole is set to increase in the direction away from the air inlet.

[0016] As a further embodiment of the present invention, the impeller assembly also includes a rotating shaft, one end of which is used for drive connection with a DC motor.

[0017] The wheel is coaxially connected to the rotating shaft, and the cleaning disc is coaxially and slidably mounted on the rotating shaft.

[0018] As a further embodiment of the present invention, an elastic element is also included, which is sleeved on the rotating shaft. One end of the elastic element abuts against the cleaning disc, and the other end abuts against the stop element near the air inlet, for pressing the cleaning disc against the wheel.

[0019] As a further embodiment of the present invention, the drive mechanism includes a transmission component and a linear module, and an elongated slot is provided on the housing, the extension direction of the elongated slot being parallel to the axial direction of the wheel.

[0020] The linear module is connected to the outer wall of the housing. One side of the transmission component is connected to the linear module, and the other side extends through the long slot to the side of the cleaning component away from the air inlet.

[0021] As a further embodiment of the present invention, the transmission component includes a transmission rod and a shift fork connected to the transmission rod, the transmission rod being connected to the linear module for transmission.

[0022] The fork is positioned around at least part of the wheel and is used to push the cleaning assembly toward the air inlet side.

[0023] In a second aspect, the present invention also provides an air conditioning system, including any of the self-cleaning centrifugal fans provided in the first aspect.

[0024] Thirdly, the present invention also provides a vehicle comprising any of the self-cleaning centrifugal blowers provided in the first aspect or an air conditioning system provided in the second aspect.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the self-cleaning centrifugal blower includes a casing, an impeller assembly, a cleaning component, and a drive mechanism. The casing has an air inlet and an air outlet. The impeller assembly includes a disc and multiple blades. The disc is rotatably disposed inside the casing. The air inlet is located on one side of the disc's axial direction, and the air outlet is located on one side of the disc's circumferential direction. Each blade is connected to the disc on the side facing the air inlet and is arranged at intervals around the disc's axis. The cleaning component is movable along the disc's axial direction and contacts the circumferential surface of each blade with a predetermined length. The drive mechanism is disposed on the casing and is used to drive the cleaning component to move, thereby scraping off the deposits on each blade.

[0026] Therefore, the self-cleaning centrifugal blower provided by the present invention can scrape off the deposits on the blades, thereby ensuring the air volume and significantly reducing the frequency of subsequent cleaning and maintenance. Attached Figure Description

[0027] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the main structure of the self-cleaning centrifugal blower provided by the present invention.

[0029] Figure 2 for Figure 1 A sectional view along section AA;

[0030] Figure 3 for Figure 2 Partial sectional view along section BB in the middle;

[0031] Figure 4 for Figure 3 A schematic diagram of a clean state;

[0032] Figure 5 for Figure 2 Another structural diagram of the cleaning component;

[0033] Figure 6 for Figure 5 A sectional view along the CC section.

[0034] Figure label:

[0035] 10. DC motor;

[0036] 100. Housing; 101. Air inlet; 102. Air outlet; 103. Long slot;

[0037] 200. Impeller assembly; 210. Disc; 220. Blade; 230. Shaft;

[0038] 300. Cleaning component; 311. Through hole; 310. Cleaning disc; 320. Cleaning sleeve; 321. Shovel; 322. Inner hole;

[0039] 400. Drive mechanism; 410. Transmission component; 411. Transmission rod; 412. Shift fork; 420. Linear module;

[0040] 500. Elastic components. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0043] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0044] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0047] When the impeller of an existing evaporator fan becomes heavily dusty, the air volume is significantly reduced. In this case, the impeller needs to be removed periodically for manual cleaning and then reinstalled into the casing. Such cleaning work is not only time-consuming and labor-intensive, but also results in a poor user experience.

[0048] Firstly, please refer to Figure 1-6 As shown, an embodiment of the present invention provides a self-cleaning centrifugal blower, comprising:

[0049] The housing 100 has an air inlet 101 and an air outlet 102.

[0050] The impeller assembly 200 includes a disc 210 and multiple blades 220. The disc 210 is rotatably disposed within the housing 100. The air inlet 101 is located on one side of the disc 210 along its axial direction, and the air outlet 102 is located on one side of the disc 210 in its circumferential direction. Each blade 220 is connected to the disc 210 on the side facing the air inlet 101 and is arranged at intervals around the axis of the disc 210.

[0051] The cleaning component 300 is axially movable along the wheel 210 and contacts the circumferential surface of a preset length segment on each blade 220.

[0052] A drive mechanism 400 is disposed on the housing 100 and is used to drive the cleaning assembly 300 to move in order to scrape off the deposits on each blade 220.

[0053] In this embodiment, the casing 100 is roughly snail-shaped, and it can be assembled from two symmetrical half-shells or formed as a single piece, such as... Figure 1 As shown, the housing 100 has a cavity for accommodating the impeller assembly 200 and the cleaning assembly 300, and also has at least one air inlet 101 and air outlet 102.

[0054] In this embodiment, the impeller assembly 200 includes a disc 210 and multiple blades 220. The disc 210 is disc-shaped, such as... Figure 2 , Figure 3 As shown, the wheel 210 can be rotatably installed in the housing 100 via a rotating shaft, pin, bearing, etc. Air inlets 101 are respectively opened on the housing 100 on both sides of the wheel 210 axially, and an air outlet 102 is opened on the housing 100 on one side of the wheel 210 circumferentially, that is, the air outlet 102 is opened roughly along the tangential direction of the wheel 210.

[0055] Each blade 220 has a roughly elongated, sheet-like structure with an arc-shaped cross-section, such as... Figure 2 As shown, the blades 220 are evenly distributed around the circumference of the impeller 210. One end of each blade 220 is connected to the end face of the impeller 210 facing the air inlet 101, and the other end of each blade 220 extends towards the corresponding air inlet 101. Furthermore, to enhance the connection strength between the blades 220, a connecting ring can be used to connect the ends of each blade 220 near the air inlet 101. Additionally, multiple blades 220 can be symmetrically arranged on both sides of the impeller 210 to form a symmetrical impeller structure.

[0056] In this embodiment, the cleaning component 300 is generally a ring-shaped thin plate structure, which can be slidably connected to each blade 220, such as... Figure 2 , Figure 3 As shown, the cleaning component 300 can move along the axial direction of the wheel 210. The cleaning component 300 is not completely fitted onto each blade 220, but only occupies a preset length segment of the total length of each blade 220. The cleaning component 300 is in contact with the circumferential surface of each blade 220, which facilitates the scraping off of the adhering substances on each blade 220.

[0057] In this embodiment, the drive mechanism 400 is at least used to drive the cleaning component 300 to move unidirectionally toward the air inlet 101. It can be a linear reciprocating mechanism, such as... Figure 2 , Figure 3 As shown, the drive mechanism 400 can be located on the outside or inside of the housing 100, extending toward the axis of the wheel 210 to slide in contact with one side of the cleaning assembly 300.

[0058] In this way, such as Figure 3 , Figure 4 As shown, when the left-side cleaning component 300 is driven to move to the left by the drive mechanism 400, the cleaning component 300 can scrape off the deposits on each blade 220 to the left. After the drive mechanism 400 returns to the center position, when the impeller assembly 200 is supplying air normally, the cleaning component 300 can move towards the impeller 210 and reset itself under the action of the wind force. Similarly, when the right-side cleaning component 300 is driven to move to the right by the drive mechanism 400, the cleaning component 300 can scrape off the deposits on each blade 220 to the right. After the drive mechanism 400 returns to the center position, when the impeller assembly 200 is supplying air normally, the cleaning component 300 can move towards the impeller 210 and reset itself under the action of the wind force.

[0059] Therefore, compared with the existing manual cleaning operation by disassembling and assembling the impeller, the application of the self-cleaning centrifugal blower provided by the present invention can scrape off the attached substances on the blades 220, thereby ensuring the air volume and significantly reducing the frequency of subsequent cleaning and maintenance.

[0060] It is worth noting that the above cleaning actions can be performed without shutting down the machine, meaning that air can still be supplied to the car interior during the cleaning process, further ensuring the driving and riding experience.

[0061] In some embodiments, the cleaning assembly 300 includes a cleaning disc 310, which has through holes 311 that match each blade 220, and each through hole 311 slides in cooperation with each blade 220.

[0062] Specifically, such as Figure 2 , Figure 3 , Figure 6 As shown, each through hole 311 is fitted with each blade 220 with a clearance, that is, the through hole 311 is fitted onto the blade 220. In this way, when the cleaning disc 310 moves along the axis, the attached substances can be scraped off through each through hole 311, resulting in a more thorough cleaning effect. The shape, size, and number of the through holes 311 can be determined according to the actual size of each blade 220, and no excessive restrictions are imposed in this embodiment.

[0063] Furthermore, in this embodiment, the cleaning component 300 also includes a plurality of cleaning sleeves 320, each cleaning sleeve 320 being inserted into a corresponding through hole 311.

[0064] Each cleaning sleeve 320 has a preset gap with each through hole 311. L Furthermore, each cleaning sleeve 320 and each blade 220 are in sliding fit.

[0065] That is, such as Figure 5 , Figure 6 As shown, each cleaning sleeve 320 can be slightly displaced and adjusted in all directions within each through hole 311. In this way, during the movement of the cleaning disc 310, on the one hand, each cleaning sleeve 320 can slide and cooperate with each blade 220 to ensure the scraping effect; on the other hand, it will not cause jamming due to slight deformation of each blade 220 or cleaning disc 310, making it more reliable.

[0066] For example, the cleaning sleeve 320 can be made of materials such as rubber or silicone, and both ends of the cleaning sleeve 320 have edges. After the cleaning sleeve 320 is inserted into the through hole 311, the edges of both ends limit the two end faces of the cleaning disc 310 to form a locking structure, ensuring that the cleaning sleeve 320 can move slightly in all directions within the through hole 311.

[0067] Furthermore, in this embodiment, each cleaning sleeve 320 has a scraping part 321 on the side facing the air inlet 101, which is transitionally connected to the corresponding blade 220.

[0068] With this setting, such as Figure 6As shown, the scraping part 321 scrapes the attached material on the blade 220, which greatly improves the cleaning effect. The specific shape and size of the scraping part 321 can be determined according to actual needs, and no restrictions are imposed in this embodiment.

[0069] And / or, each cleaning sleeve 320 has an inner hole 322 that mates with each blade 220, and the cross section of each inner hole 322 is set to increase in the direction away from the air inlet 101.

[0070] In this way, such as Figure 6 As shown, when the cleaning disc 310 moves the cleaning sleeve 320 toward the wheel 210 to reset, the resistance is smaller and the reset is easier.

[0071] Furthermore, in this embodiment, the impeller assembly 200 also includes a rotating shaft 230, one end of which is used for drive connection with the DC motor 10.

[0072] The wheel 210 is coaxially connected to the rotating shaft 230, and the cleaning disc 310 is coaxially and slidably disposed on the rotating shaft 230.

[0073] Specifically, such as Figure 1 , Figure 3 As shown, the wheel 210 is coaxially connected to the rotating shaft 230, and the cleaning disc 310 is coaxially sleeved on the rotating shaft 230, ensuring that the cleaning disc 310 can move stably on the rotating shaft 230. One end of the rotating shaft 230 can be connected to the shaft end of the DC motor 10, and the housing of the DC motor 10 can be fixed to the outside of the housing 100.

[0074] In addition, the DC motor 10 can have two output terminals. Each end of the DC motor 10 can be respectively equipped with a housing 100, an impeller assembly 200, a cleaning assembly 300, and a drive mechanism 400 to form a dual-air supply structure. The specific connection structure between the DC motor 10, the impeller 210, and the housing 100 can be determined according to actual needs, and no excessive restrictions are imposed in this embodiment.

[0075] Furthermore, in this embodiment, an elastic element 500 is also included, which is sleeved on the rotating shaft 230. One end of the elastic element 500 abuts against the cleaning disc 310, and the other end abuts against the stop near the air inlet 101, for pressing the cleaning disc 310 against the wheel 210.

[0076] Specifically, such as Figure 3 , Figure 4 As shown, the elastic element 500 can be a compression spring, which is sleeved on the rotating shaft 230. One end of the elastic element 500 abuts against the cleaning disc 310, and the other end abuts against the stop member near the air inlet 101. The stop member can be a retaining ring, a retaining pin, etc., and is installed on the rotating shaft 230.

[0077] In this way, after the drive mechanism 400 returns to the neutral position, the elastic element 500 can drive the cleaning disc 310 to move toward the wheel 210. It should be noted that the elastic force of the elastic element 500 should be as small as possible to avoid the drive mechanism 400 needing a lot of force to drive the cleaning component 300 to move. This can be determined according to actual needs, and no excessive restrictions are imposed in this embodiment.

[0078] In some embodiments, the drive mechanism 400 includes a transmission member 410 and a linear module 420. The housing 100 has an elongated slot 103, the extension direction of which is parallel to the axial direction of the wheel 210.

[0079] The linear module 420 is connected to the outer wall of the housing 100. One side of the transmission component 410 is connected to the linear module 420, and the other side extends through the elongated slot 103 to the side of the cleaning component 300 away from the air inlet 101.

[0080] Specifically, such as Figure 2 , Figure 3 As shown, the elongated slot 103 is radially formed along the wheel 210 and parallel to the axis of the wheel 210. The transmission component 410 can be a transmission rod, transmission plate, etc. The linear module 420 can be composed of a motor, a lead screw, a slider, and a guide rail. The lead screw and guide rail are parallel and mounted on the outer wall of the housing 100 via a support, and their axes are parallel to the axis of the wheel 210. The slider is slidably mounted on the guide rail and engages with the lead screw for transmission.

[0081] In this design, one end of the transmission component 410 is fixed to the moving part of the linear module 420 (such as the slider), and the other end of the transmission component 410 extends towards the wheel 210 after passing through the elongated slot 103, and is located on the side of the cleaning component 300 opposite to the air inlet 101. In this way, the linear module 420 can drive the transmission component 410 to move along a direction parallel to the axis of the wheel 210, thereby driving the cleaning component 300 to move towards the air inlet 101 to scrape off the attached material. Of course, the linear module 420 can also be replaced by other types of linear drive components, such as electric push rods, depending on actual needs; this embodiment does not impose excessive restrictions.

[0082] It should be noted that sealing strips can be set on both sides of the long slot 103, which ensures that the transmission component 410 can move between the two sealing strips and also ensures the sealing of the long slot 103, thereby ensuring the air supply effect inside the housing 100.

[0083] Furthermore, in this embodiment, the transmission component 410 includes a transmission rod 411 and a shift fork 412 connected to the transmission rod 411, and the transmission rod 411 is connected to the linear module 420 in a transmission connection.

[0084] The fork 412 is positioned around at least a portion of the wheel 210 and is used to push the cleaning assembly 300 toward the air inlet 101.

[0085] Specifically, such as Figure 2 , Figure 3 As shown, one end of the transmission rod 411 is fixed to the moving part of the linear module 420, and the other end of the transmission rod 411 is connected to the shift fork 412. The recess on the shift fork 412 matches at least part of the circumference of the wheel 210. In this way, the cleaning component 300 can be driven to move stably by sliding friction through the contact of the shift fork 412 with multiple points, avoiding jamming due to deformation.

[0086] Furthermore, in order to reduce friction with the cleaning component 300, multiple spherical protrusions can be provided on the inner side of the shift fork 412 around the wheel 210. The spherical protrusions form sliding friction with the cleaning component 300, thereby reducing wear.

[0087] It should be noted that when cleaning is not required, the shift fork 412 is located radially outward of the wheel 210 and does not contact the cleaning component 300, thus not interfering with the rotation of the cleaning component 300 with the impeller assembly 200.

[0088] Secondly, embodiments of the present invention also provide an air conditioning system, including the self-cleaning centrifugal blower provided in any of the above embodiments. The air conditioning system includes an evaporator, and the casing 100 is fixedly connected to the evaporator by means of screws, snap-fits, or other methods, with the air outlet 102 aligned with the fins on the evaporator to achieve air delivery.

[0089] Therefore, the air conditioning system provided in this embodiment of the invention, by configuring a self-cleaning centrifugal fan, can scrape off the deposits on the blades 220, thereby ensuring the air volume and significantly reducing the frequency of subsequent cleaning and maintenance.

[0090] Thirdly, embodiments of the present invention also provide a vehicle, including the self-cleaning centrifugal blower provided in any of the above embodiments or the air conditioning system provided in any of the above embodiments.

[0091] Therefore, the vehicle provided in this embodiment of the invention, by configuring a self-cleaning centrifugal blower or an air conditioning system with such a blower, can scrape off the deposits on the blades 220, thereby ensuring the air volume and significantly reducing the frequency of subsequent cleaning and maintenance.

[0092] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A self-cleaning centrifugal blower, used in a vehicle's air conditioning system, characterized in that, include: The housing (100) has an air inlet (101) and an air outlet (102). An impeller assembly (200) includes a impeller (210) and a plurality of blades (220). The impeller (210) is rotatably disposed within the housing (100). The air inlet (101) is located on one side of the impeller (210) along its axial direction, and the air outlet (102) is located on one side of the impeller (210) along its circumference. Each blade (220) is connected to the side of the impeller (210) facing the air inlet (101) and is arranged at intervals around the axis of the impeller (210). The air inlets (101) are respectively provided on the housing (100) on both sides of the impeller (210) along its axial direction, and the blades (220) are symmetrically arranged on both sides of the impeller (210). A cleaning component (300) is provided to move along the axial direction of the wheel (210) and to contact the circumferential surface of a predetermined length on each of the blades (220); the cleaning component (300) is provided on each of the blades (220) on both sides of the wheel (210). A drive mechanism (400) is disposed on the housing (100) and is used to drive the cleaning components (300) on both sides of the wheel (210) to move to scrape off the deposits on each of the blades (220); The cleaning assembly (300) includes a cleaning disc (310) having through holes (311) that match each of the blades (220), and each through hole (311) slidingly engaging with each of the blades (220). The impeller assembly (200) also includes a rotating shaft (230), one end of which is used for drive connection with a DC motor (10); The wheel (210) is coaxially connected to the rotating shaft (230), and the cleaning disc (310) is coaxially and slidably disposed on the rotating shaft (230); It also includes an elastic element (500) which is sleeved on the rotating shaft (230). One end of the elastic element (500) abuts against the cleaning disc (310), and the other end abuts against a stop near the air inlet (101) to press the cleaning disc (310) against the wheel (210). The drive mechanism (400) includes a transmission component (410) and a linear module (420). The housing (100) has an elongated slot (103) which extends parallel to the axial direction of the wheel (210). The linear module (420) is connected to the outer wall of the housing (100). One side of the transmission component (410) is connected to the linear module (420), and the other side extends through the long slot (103) to the side of the cleaning component (300) away from the air inlet (101). The transmission component (410) includes a transmission rod (411) and a shift fork (412) connected to the transmission rod (411), and the transmission rod (411) is connected to the linear module (420) in a transmission connection. The fork (412) is positioned around at least a portion of the wheel (210) and is used to push the cleaning assembly (300) toward the air inlet (101).

2. The self-cleaning centrifugal blower according to claim 1, characterized in that, The cleaning assembly (300) also includes a plurality of cleaning sleeves (320), each of the cleaning sleeves (320) being inserted into each of the through holes (311); Each of the cleaning sleeves (320) and each of the through holes (311) has a preset gap, and each of the cleaning sleeves (320) and each of the blades (220) are in sliding fit.

3. The self-cleaning centrifugal blower according to claim 2, characterized in that, Each of the cleaning sleeves (320) has a scraper (321) on the side facing the air inlet (101) that is transitionally connected to the corresponding blade (220). And / or, each of the cleaning sleeves (320) has an inner hole (322) that mates with each of the blades (220), and the cross section of each of the inner holes (322) is increased in the direction away from the air inlet (101).

4. An air conditioning system, characterized in that, Including the self-cleaning centrifugal blower as described in any one of claims 1 to 3.

5. A vehicle, characterized in that, Includes the self-cleaning centrifugal fan as described in any one of claims 1 to 3 or the air conditioning system as described in claim 4.

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