Centrifugal fan assembly and cabinet air conditioner having the same

Abstract

The application provides a centrifugal fan assembly and a cabinet air conditioner with the same, wherein the centrifugal fan assembly comprises: a fan component; a fan fixing frame which is a cylinder coaxial with a rotating shaft of the fan component, the fan fixing frame comprising a cover plate ring, a bottom plate and a plurality of guide vanes, the cover plate ring and the bottom plate being connected by the plurality of guide vanes to form a containing space of the fan component, the fan component being assembled on the bottom plate, the plurality of guide vanes being arranged along the circumference of the bottom plate, and an air outlet being formed between two adjacent guide vanes; an outer thread extending along the axial direction of the cylinder is formed on the outer side of the bottom plate and each guide vane, and the fan fixing frame is threadedly connected with a first inner thread hole of a fixing base through the outer thread. The application reduces the space occupation of the assembled components, does not need to separately set a structure for controlling the lifting of the centrifugal fan assembly, reduces the parts and simplifies the lifting adjustment structure design of the centrifugal fan assembly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fan design, and particularly relates to a centrifugal fan assembly and a cabinet air conditioner with the same. BACKGROUND

[0002] With the large application of 4G and the gradual popularization of 5G, the heat generation of various data processing equipment is getting larger and larger, and the cooling capacity and energy saving requirements of air conditioning equipment in data centers are also getting higher and higher. In the precision computer room air conditioning unit of the down air supply, the centrifugal fan is arranged outside the air conditioning unit, which can fully improve the air supply efficiency, and therefore is widely used in engineering.

[0003] The utility model patent with the publication number CN202769812U discloses an air conditioning device, which comprises a heat exchanger and a structural assembly. The structural assembly is provided with a plurality of installation positions for installing a fan and the like. The fan is slidably fixed along the sliding guide rail, so that the installation of the fan is convenient, and the installation position is adjustable. However, it is difficult to lift the heavy centrifugal fan again when the centrifugal fan is maintained and replaced.

[0004] The invention patent with the publication number CN106949551A discloses a fan mounting structure and an air conditioner. A plurality of elastic mechanisms are used to connect the mounting plate group and the cabinet fixed base 101. The centrifugal fan assembly is self-locked in the first position and the second position through the elastic force change of the elastic mechanisms. However, it is difficult to ensure that the plurality of elastic mechanisms change synchronously during operation, which may cause the centrifugal fan assembly to tilt and fall, especially when the unit encounters severe bumps during transportation. The elastic mechanisms may also have problems of elastic force attenuation or even failure after long-term placement.

[0005] The utility model patent with the publication number CN208025756U discloses a fan mounting structure and an air conditioner. The centrifugal fan assembly is accommodated in the cabinet, which comprises a fan and a mounting plate group connected with the fan. The middle part of the bottom of the mounting plate group is rotatably connected with the fixed base 101, so that the fan can be turned over by 180 degrees from the inside of the cabinet to the outside of the cabinet through the opening. The opening usually needs to be larger than the horizontal projection size of the centrifugal fan assembly to ensure that the outermost part of the centrifugal fan assembly can pass through the opening during the turning over process. After turning over, the opening needs to be sealed with a cover plate. At the same time, it is difficult to turn over the heavy centrifugal fan again when the centrifugal fan is maintained and replaced, which is not convenient for the replacement operation of the after-sales personnel.

[0006] The fixing and mounting structure of the above-mentioned fan generally adopts a square structure to fix a circular centrifugal fan, which has problems of large structure, too much occupation of cabinet space, and inconvenient sinking of the fan. Meanwhile, the fixing structure and the lifting structure are two independent mechanisms, and the two need to be fixedly connected, which has many parts and a complex structure. SUMMARY

[0007] Therefore, the present application provides a centrifugal fan assembly and a cabinet air conditioner with the same, which can solve the technical problems of the prior art, i.e., the large structure, too much occupation of cabinet space, and inconvenient sinking of the fan of the centrifugal fan assembly with a square structure, and the complex structure of the lifting structure and the fixing structure.

[0008] In order to solve the above-mentioned problems, the present application provides a centrifugal fan assembly, which comprises:

[0009] a fan component;

[0010] a fan fixing frame which is a cylinder coaxial with a rotating shaft of the fan component, the fan fixing frame comprising a cover plate ring, a bottom plate, and a plurality of guide vanes, the cover plate ring and the bottom plate being connected by the plurality of guide vanes to form a containing space of the fan component, the fan component being assembled on the bottom plate, the plurality of guide vanes being arranged along the circumference of the bottom plate, and an air outlet being formed between two adjacent guide vanes;

[0011] the bottom plate and the outer side of each guide vane being provided with an outer thread extending along the axial direction of the cylinder, and the fan fixing frame being threadedly connected with a first inner thread hole of a fixing base.

[0012] In some embodiments,

[0013] the fan component comprises a driving motor and a centrifugal fan blade, wherein the driving motor comprises a fixing member and a rotating shaft, the driving motor is fixedly connected with the bottom plate through the fixing member, and the centrifugal fan blade is fixedly sleeved on the rotating shaft.

[0014] In some embodiments,

[0015] each guide vane has a guide angle.

[0016] In some embodiments,

[0017] the centrifugal fan blade has a diameter d, each guide vane extends from the radial inner side of the cylinder to the radial outer side, the midpoint of each guide vane in the length direction forms a circle with a diameter D, and the guide angle is arcsin(d / D).

[0018] In some embodiments,

[0019] Two ends of each of the guide vanes are respectively welded to the cover plate ring and the bottom plate.

[0020] Each of the guide vanes, the cover plate ring and the bottom plate is formed by blanking a hollow barrel, and a guide angle of each of the guide vanes is formed by twisting after blanking.

[0021] In some embodiments,

[0022] The cover plate ring is detachably connected with a rotating driving member.

[0023] In some embodiments,

[0024] The rotating driving member has a plurality of rotating driving members, and the plurality of rotating driving members are arranged along the circumference of the cover plate ring; and / or,

[0025] The rotating driving member is a threaded cylinder, and the rotating driving member is threadedly connected with the cover plate ring.

[0026] In some embodiments,

[0027] The cover plate ring is a sheet metal part, and a riveting nut is connected to the cover plate ring, and each of the rotating driving members is threadedly connected with the riveting nut.

[0028] In some embodiments,

[0029] An outer diameter of the cover plate ring is greater than a maximum diameter of the first internal threaded hole.

[0030] The application also provides a cabinet air conditioner, comprising:

[0031] An air conditioner main body has the fixing base and the centrifugal fan assembly, and the centrifugal fan assembly is threadedly connected to the first internal threaded hole of the fixing base through the fan fixing frame.

[0032] In some embodiments,

[0033] The fixing base is located at the bottom of the air conditioner main body.

[0034] The centrifugal fan assembly has a raised position and a sunken position, when the centrifugal fan assembly is in the raised position, the centrifugal fan assembly is accommodated in the air conditioner main body, and when the centrifugal fan assembly is in the sunken position, each air outlet of the centrifugal fan assembly is located in an area below the bottom surface of the air conditioner main body.

[0035] In some embodiments,

[0036] A guide ring is further included, which is connected with the cover ring when the centrifugal fan assembly is in the raised position, and is connected with the fixed base when the centrifugal fan assembly is in the sunken position.

[0037] In some embodiments,

[0038] A plurality of through holes are further provided on the cover ring and are spaced along the circumference thereof, and the guide ring is connected with the fixed base by means of bolts penetrating through the guide ring and the through holes when the centrifugal fan assembly is in the sunken position.

[0039] The outer contour of the fan fixing frame is a cylindrical shape coaxial with the fan blades of the fan assembly, instead of a square shape with edges as in the prior art, so that the structural size of the entire centrifugal fan assembly can be reduced, thereby effectively reducing the space occupation of the corresponding assembled component (e.g. cabinet air conditioner), and more importantly, since the fan fixing frame is cylindrical, the outer thread is formed on the outer side surface of each guide blade and the outer side surface of the bottom plate, so that the fan fixing frame can be threadedly connected with the corresponding fixed base. Thus, the height of the centrifugal fan assembly can be adjusted by the specific thread matching position of the fan fixing frame and the first inner threaded hole, without the need to separately provide a structure for controlling the lifting of the centrifugal fan assembly, thereby reducing the number of parts and simplifying the design of the lifting adjustment structure of the centrifugal fan assembly. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a disassembled structural schematic view of the centrifugal fan assembly of the present application (including the fixed base and the guide ring);

[0041] Figure 2 is Figure 1 is a state diagram of the centrifugal fan assembly in the raised position in

[0042] Figure 3 is Figure 2 is a state diagram of the centrifugal fan assembly in the process of transitioning from the raised position to the sunken position in

[0043] Figure 4 is Figure 2 is a state diagram of the centrifugal fan assembly in the sunken position in

[0044] Figure 5 is Figure 1 is a three-dimensional structural schematic view of the fan fixing frame in

[0045] Figure 6 is Figure 5 is a local enlarged view of A in

[0046] Figure 7 Another perspective view of the fan fixing frame in Figure 1 , wherein the air guide blades are punched and twisted to form air guide angles;

[0047] Figure 8 A partial enlarged view of B in Figure 7 , wherein the twisted state of the air guide blades can be seen;

[0048] Figure 9 A partial enlarged view of C in Figure 5 , or Figure 7 ;

[0049] Figure 10 A partial enlarged view of D in Figure 9 ;

[0050] Figure 11 A partial enlarged view of D in Figure 9 .

[0051] The reference signs are as follows:

[0052] 1. A fan component;

[0053] 11. A driving motor; 12. A centrifugal fan blade;

[0054] 2. A fan fixing frame;

[0055] 21. A cover plate ring; 211. A riveting nut; 212. A through hole; 213. An air inlet; 22. A bottom plate; 23. An air guide blade; 231. An air outlet;

[0056] 31. An external thread;

[0057] 4. A rotary driving component;

[0058] 101. A fixing base; 102. A first internal thread hole; 103. A flow guide ring; 104. A bolt component. DETAILED DESCRIPTION

[0059] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with specific embodiments and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0060] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application and in the above-described drawings are intended to distinguish similar objects and are not necessarily used to describe a particular sequential or chronological order. It should be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the application described herein can be implemented in orders other than those illustrated or described herein.

[0061] With reference to Figures 1 to 11 As shown, according to the embodiments of the present application, a centrifugal fan assembly is provided, comprising:

[0062] A fan component 1, which is a centrifugal fan, that is, the airflow enters the centrifugal fan through the axial inlet, and is discharged through the radial outlet;

[0063] A fan fixing frame 2, which is a cylindrical shape coaxial with the rotating shaft of the fan component 1, that is, its outer contour is cylindrical, the fan fixing frame 2 comprises a cover ring 21, a bottom plate 22, and a plurality of guide vanes 23, the cover ring 21 and the bottom plate 22 are connected by the plurality of guide vanes 23 to form a containing space of the fan component 1, the cover ring 21 is configured with an air inlet 213, through which the fan component 1 can be assembled on the bottom plate 22, the plurality of guide vanes 23 are arranged along the circumference of the bottom plate 22, and the adjacent two guide vanes 23 form an air outlet 231, when the fan component 1 is running, the airflow enters the containing space through the aforementioned air inlet 213 and is blown out from each air outlet 231;

[0064] The outer side of the bottom plate 22 and each guide vane 23 is configured with an external thread 31 extending along the axial direction of the cylindrical shape, the fan fixing frame 2 is screwed with the first internal thread hole 102 of the fixing base 101 through the external thread 31, the aforementioned outer side is also the side corresponding to the component away from the central axis of the cylindrical shape, on the contrary, the side close to the central axis of the cylindrical shape is the inner side.

[0065] In this technical solution, the outer contour of the fan fixing frame 2 is a cylindrical shape coaxial with the fan blades of the fan assembly, rather than the square shape with edges in the prior art, thereby reducing the structural size of the entire centrifugal fan assembly, and effectively reducing the space occupation of the corresponding assembled component (such as a cabinet air conditioner), and more importantly, since the fan fixing frame 2 in the present application is cylindrical, the aforementioned external thread 31 is configured on the outer side of each guide vane 23 and the outer side of the bottom plate 22, so that the fan fixing frame 2 can be screwed with the corresponding fixing base 101, and thus the height of the centrifugal fan assembly can be adjusted by the specific screwing position of the fan fixing frame 2 and the first internal thread hole 102, without the need to separately provide a structure for controlling the lifting of the centrifugal fan assembly, reducing the number of parts and simplifying the design of the lifting adjustment structure of the centrifugal fan assembly.

[0066] In one specific embodiment, the fan component 1 comprises a driving motor 11 and a centrifugal fan blade 12, wherein the driving motor 11 comprises a fixing part and a rotating shaft, the driving motor 11 is fixedly connected with the bottom plate 22 through the fixing part, and the centrifugal fan blade 12 is fixedly sleeved on the rotating shaft. It can be understood that the bottom plate 22 has a plurality of connecting holes which form reliable connections with the fixing part.

[0067] In the technical solution, the driving motor 11 is fixedly connected with the bottom plate 22, which is away from the air inlet 213, thereby effectively preventing the driving motor 11 from hindering the air flow of the fan.

[0068] In one preferred embodiment, each guide vane 23 has a guide angle to ensure that the air flow is more smoothly out. In one specific embodiment, the impeller diameter of the centrifugal fan blade 12 is d, each guide vane 23 extends from the radially inner side of the cylindrical shape to the radially outer side, the midpoint of the length direction of each guide vane 23 forms a circle with a diameter D, and the guide angle is arcsin(d / D).

[0069] In the technical solution, the guide angle is designed as arcsin(d / D), which can make the guide vane 23 consistent with the tangential outflow direction of the air flow, reduce the wind resistance, and ensure that the air flow resistance is minimized.

[0070] In some embodiments, the two ends of each guide vane 23 are respectively welded to the cover plate ring 21 and the bottom plate 22 (as shown in Figure 5 When the external size of the centrifugal fan assembly is large, the welding connection mode can reduce the manufacturing difficulty of the fan fixing frame 2; in another embodiment, the guide vane 23, the cover plate ring 21 and the bottom plate 22 are formed by hollow barrel blanking, and the guide angle of each guide vane 23 is formed by twisting after blanking. This forming method is especially suitable for small-sized centrifugal fan assemblies, which is convenient for the manufacturing of small-sized fan fixing frames 2. The aforementioned blanking is a punching cutting method, which divides the barrel wall of the hollow barrel into a plurality of strips connected to the two ends of the hollow barrel. Then, the strips are twisted according to the preset guide angle. It can be understood that the wall thickness of the fan fixing frame 2 formed by this method should be relatively small to facilitate the smooth progress of the blanking and twisting processes.

[0071] Referring to Figure 6 In some embodiments, the cover plate ring 21 is detachably connected with a rotating driving part 4, and the user can rotate the centrifugal fan assembly by applying force to the rotating driving part 4, thereby achieving the lifting adjustment of the centrifugal fan assembly.

[0072] The rotating driving member 4 is provided in plurality, and the plurality of rotating driving members 4 are arranged at intervals along the circumference of the cover plate ring 21, preferably uniformly arranged, and specifically as shown in the drawings, in this specific embodiment, the aforementioned rotating driving member 4 is designed as four, and the four rotating driving members 4 are arranged at intervals along the circumference of the cover plate ring 21, so that the user can rotate different rotating driving members 4 to apply force according to actual needs, which is especially suitable for the working condition that the diameter of the cover plate ring 4 is large, and the user can realize the rotation of the centrifugal fan assembly for multiple turns in place without large displacement. Figure 5

[0073] Continuing to refer to Figure 6 As shown in the drawings, the rotating driving member 4 is a threaded cylinder, and the rotating driving member 4 is threadedly connected with the cover plate ring 21, so that the rotating driving member 4 in the application can be used as a force applying member and also as a connecting member, and specifically as described below, when the centrifugal fan assembly of the application is assembled in a cabinet air conditioner and is inside the air conditioner body, the corresponding flow guide ring 103 can be fixed on the cover plate ring 21 through the rotating driving member 4, which makes the flow guide ring 103 reliably placed during transportation of the cabinet air conditioner.

[0074] In a specific embodiment, the cover plate ring 21 is a sheet metal part, and the cover plate ring 21 is connected with a riveting nut 211, and each rotating driving member 4 is threadedly connected with the riveting nut 211.

[0075] In this technical solution, the cover plate ring 21 is formed by a sheet metal part, which can ensure the structural strength while having a relatively small weight, which can more conveniently lift the centrifugal fan assembly, and since the thickness of the sheet metal part is small, the riveting nut 211 in the application can be very conveniently connected to the sheet metal part, and its arrangement will not cause deformation of the sheet metal part while also being able to increase the screwing depth of the rotating driving member 4 and the cover plate ring 21, thereby improving the reliability of the connection therebetween.

[0076] In some embodiments, the outer diameter of the cover plate ring 21 is greater than the maximum diameter of the first internally threaded hole 102, as shown in the drawings, Figure 9 As shown in the drawings, the outer edge of the cover plate ring 21 is formed as an outward turning structure, which can reliably limit the lowering of the fan fixing frame 2.

[0077] According to the embodiments of the application, a cabinet air conditioner is also provided, which comprises:

[0078] The air conditioner body (not shown in the drawings) has a fixed base 101 and the aforementioned centrifugal fan assembly inside, and the centrifugal fan assembly is threadedly connected in the first internally threaded hole 102 of the fixed base 101.

[0079] ​The technical scheme, by constructing the external thread 31 on the outer side surface of each guide vane 23 and the outer side surface of the bottom plate 22, the fan fixing frame 2 can be screwed with the corresponding fixed base 101, so that the height of the centrifugal fan assembly can be adjusted by the specific screwing position of the fan fixing frame 2 and the first internal thread hole 102, without the need to separately set a structure for controlling the lifting of the centrifugal fan assembly, reducing the number of parts and simplifying the design of the lifting adjustment structure of the centrifugal fan assembly.

[0080] In some embodiments,

[0081] The fixed base 101 is located at the bottom of the air conditioner main body.

[0082] The centrifugal fan assembly has a raised position and a sunken position. When the centrifugal fan assembly is in the raised position, the centrifugal fan assembly is accommodated in the air conditioner main body. In this state, the bottom of the air conditioner main body can be a main bearing structure, so that the transportation and position adjustment of the cabinet air conditioner in this state are more convenient without damaging the centrifugal fan assembly. When the centrifugal fan assembly is in the sunken position, each air outlet 231 of the centrifugal fan assembly is located in the area below the bottom surface of the air conditioner main body. In this state, when the centrifugal fan assembly is running, the sunken air outlet of the cabinet air conditioner is realized.

[0083] It should be noted that the cabinet air conditioner is widely used in data centers and other scenarios. The data center space has a large number of data processing devices. In order to ensure the tidiness of the data center space and the rationality of the pipeline arrangement, the cables of each data processing device are mostly in a downward leading-out manner. This part of the cable is in the hollow interlayer between the floor of the data center space and the ground. For this working condition, the cabinet air conditioner in the present application has the aforementioned centrifugal fan assembly which can be rotated and lowered to the sunken position during use. The airflow generated by the operation of the centrifugal fan assembly can flow in the hollow interlayer and enter the device from the bottom opening of each data processing device to form more effective cooling from the inside out.

[0084] For a better understanding of the present application, Figures 1 to 4As shown, in some embodiments, the cabinet air conditioner further comprises a flow guide ring 103, which is connected with the cover ring 21 when the centrifugal fan assembly is in the raised position, and is connected with the fixed base 101 when the centrifugal fan assembly is in the sunken position. The flow guide ring 103 is arranged to guide the air flow at the aforementioned air inlet 213, reduce the air inlet resistance, and ensure the air inlet flow and the air inlet amount. In this technical solution, when the centrifugal fan assembly is in the raised position, the flow guide ring 103 is connected with the cover ring 21, thereby fixing the position of the flow guide ring 103 during the transportation or transfer of the cabinet air conditioner, so that the component structure is more compact. When the centrifugal fan assembly is in the sunken position, the flow guide ring 103 is reliably connected with the fixed base 101, so that the air flow can enter the centrifugal fan assembly through the flow guide ring 103 to the greatest extent and be sent out.

[0085] In a specific embodiment, the cover ring 21 further has a plurality of through holes 212 arranged at intervals in the circumferential direction thereof. When the centrifugal fan assembly is in the sunken position, the flow guide ring 103 is connected with the fixed base 101 by penetrating the flow guide ring 103 and the through holes 212 through the bolt member 104 and / or the rotary driving member 4. In this technical solution, the positioning and connection of the flow guide ring 103 can be realized while the positioning of the cover ring 21 and the fixed base 101 is realized, thereby reliably locking the angular displacement (position) of the centrifugal fan assembly, and the structure is more reliable. The aforementioned bolt member 104 can be a self-tapping screw, for example. In another embodiment, after the centrifugal fan assembly is in the sunken position, the rotary driving member 4 is separately screwed to the fixed base plate 101, so as to be used again for adjusting the height of the centrifugal fan assembly next time, and to prevent scattering and loss.

[0086] In a preferred embodiment, a sealing ring (preferably a rubber ring, not shown in the figure) is clamped between the cover ring 21 and the fixed base 101 when the centrifugal fan assembly is in the sunken position, so as to prevent air leakage. Because the air pressure at the outlet of the centrifugal fan is high, and the cover ring 21 and the fixed base 101 can not be completely sealed, air leakage can occur. The sealing ring can prevent air leakage.

[0087] Please refer to Figures 2 to 4 As shown, the following describes the lowering and raising operation steps of the centrifugal fan assembly of the present application:

[0088] As Figure 2As shown, the centrifugal fan assembly is arranged on the upper portion of the fixed base 101 and partially cooperates with the inner threaded hole (i.e. the first inner threaded hole 102, same below) of the fixed base 101, so that the centrifugal fan assembly is inside the cabinet air conditioner, and the centrifugal fan assembly is protected and the height space size of the air conditioner cabinet is reduced. After installation on site, the centrifugal fan assembly needs to be lowered to the outside space of the air conditioner cabinet, at which time the threaded section of the bolt column (i.e. the rotating drive member 4 described above, same below) is screwed into the riveting nut 211, and the bolt column is rotated to lower the centrifugal fan assembly (as shown in Figure 3 After the centrifugal fan assembly is lowered to the position (as shown in Figure 4 The bolt column is removed from the riveting nut 211, the bolt through hole (i.e. the through hole 212 described above, same below) of the guide ring 103 and the cover ring 21 of the centrifugal fan assembly is aligned, and the centrifugal fan assembly is fine-tuned so that the bolt through hole is aligned with the inner threaded bolt hole on the fixed base 101, and then the guide ring and the centrifugal fan assembly are fixed with the bolt column and other fasteners (i.e. the bolt member 104 described above, same below). The secondary use of the bolt column can ensure that it will not be lost, and it can be reused the next time the centrifugal fan assembly needs to be raised.

[0089] When the centrifugal fan assembly needs to be raised, the bolt column and other fasteners are loosened, the threaded section of the bolt column is screwed into the riveting nut on the cover ring of the centrifugal fan assembly, and the centrifugal fan assembly is rotated in the opposite direction to be raised until the centrifugal fan assembly is raised to the desired position or is separated from the fixed base 101 (i.e. the raised position).

[0090] The fastener is a default bolt, and a self-tapping screw can be used instead.

[0091] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0092] Although embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A centrifugal fan assembly, characterized by, The centrifugal fan assembly comprises: a fan component (1); a fan fixing frame (2) which is a cylinder coaxial with a rotating shaft of the fan component (1), the fan fixing frame (2) comprising a cover ring (21), a bottom plate (22), and a plurality of air guide blades (23), the cover ring (21) and the bottom plate (22) being connected by the plurality of air guide blades (23) to form a containing space of the fan component (1), the fan component (1) being assembled on the bottom plate (22), the plurality of air guide blades (23) being arranged along the circumference of the bottom plate (22) at intervals, and an air outlet (231) being formed between any two adjacent air guide blades (23); an outer thread (31) extending along the axial direction of the cylinder is formed on the outer side of the bottom plate (22) and each air guide blade (23), and the fan fixing frame (2) is threadedly connected with a first inner threaded hole (102) of a fixing base (101) through the outer thread (31).

2. The centrifugal fan assembly according to claim 1, wherein the fan component (1) comprises a driving motor (11) and a centrifugal fan blade (12), the driving motor (11) comprises a fixing member and a rotating shaft, the driving motor (11) is fixedly connected with the bottom plate (22) through the fixing member, and the centrifugal fan blade (12) is fixedly sleeved on the rotating shaft.

3. The centrifugal fan assembly according to claim 2, wherein each air guide blade (23) has an air guide angle.

4. The centrifugal fan assembly according to claim 3, wherein a diameter of an impeller of the centrifugal fan blade (12) is d, a length direction of each air guide blade (23) is from a radially inner side of the cylinder to a radially outer side, a diameter of a circle formed by midpoints of the length direction of each air guide blade (23) is D, and the air guide angle is arcsin(d / D).

5. The centrifugal fan assembly according to claim 3, wherein two ends of each air guide blade (23) are respectively welded to the cover ring (21) and the bottom plate (22); or the air guide blade (23), the cover ring (21), and the bottom plate (22) are formed by blanking a hollow barrel, and the air guide angle of each air guide blade (23) is formed by twisting after blanking.

6. The centrifugal fan assembly according to claim 1, wherein a rotary driving member (4) is detachably connected to the cover ring (21).

7. The centrifugal fan assembly according to claim 6, wherein a plurality of rotary driving members (4) are arranged along the circumference of the cover ring (21) at intervals; and / or the rotary driving member (4) is a threaded column, and the rotary driving member (4) is threadedly connected with the cover ring (21).

8. The centrifugal fan assembly according to claim 7, wherein The cover ring (21) is a sheet metal part, and a riveting nut (211) is connected to the cover ring (21), and each rotating driving part (4) is threadedly connected with the riveting nut (211).

9. The centrifugal fan assembly according to claim 1, wherein, The outer diameter of the cover ring (21) is greater than the maximum diameter of the first internally threaded hole (102).

10. A cabinet air conditioner characterized by comprising: Comprise: An air conditioner body has a fixed base (101) and the centrifugal fan assembly according to any one of claims 1 to 9, and the centrifugal fan assembly is threadedly connected to the first internally threaded hole (102) of the fixed base (101) through the fan fixing frame (2).

11. The cabinet air conditioner according to claim 10, wherein, The fixed base (101) is located at the bottom of the air conditioner body; The centrifugal fan assembly has a raised position and a sunken position, when the centrifugal fan assembly is in the raised position, the centrifugal fan assembly is accommodated in the air conditioner body, and when the centrifugal fan assembly is in the sunken position, each air outlet (231) of the centrifugal fan assembly is located in the area below the bottom surface of the air conditioner body.

12. The cabinet air conditioner according to claim 11, wherein, Further comprising a flow guide ring (103), when the centrifugal fan assembly is in the raised position, the flow guide ring (103) is connected with the cover ring (21), and when the centrifugal fan assembly is in the sunken position, the flow guide ring (103) is connected with the fixed base (101).

13. The cabinet air conditioner according to claim 12, wherein, The cover ring (21) further has a plurality of through holes (212) spaced along the circumference thereof, when the centrifugal fan assembly is in the sunken position, the flow guide ring (103) is connected with the fixed base (101) through the flow guide ring (103) and the through holes (212) by using a bolt (104).

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