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, the centrifugal fan assembly comprising: 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 top ring, a bottom plate and arc-shaped connecting pieces, the top ring and the bottom plate are connected by the arc-shaped connecting pieces to form a containing space for the fan component, the fan component is assembled on the bottom plate, the arc-shaped connecting pieces are arranged at intervals, and an air outlet is formed between two adjacent arc-shaped connecting pieces; an outer thread extending spirally along the axial direction of the cylinder is formed on the outer side of the bottom plate and each arc-shaped connecting piece, and an inner thread connecting ring is threadedly connected to the outer thread, the centrifugal fan assembly is connected to a first through hole of a fixing base through the inner thread connecting ring and can be driven to lift. The application reduces the space occupation of the assembled components, does not need to separately arrange 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 edge 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 influence on sinking of the fan, and 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 that the rotating fan part in the centrifugal fan assembly adopts a square structure, which has a large structure, too much occupation of cabinet space, inconvenient sinking of the fan, and many parts and a complex structure of the independent fixing structure and lifting structure.

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

[0009] a fan part;

[0010] a fan fixing frame which is a cylinder coaxial with a rotating shaft of the fan part, the fan fixing frame comprising a top ring, a bottom plate, and a plurality of arc-shaped connecting pieces, the top ring and the bottom plate being connected by the plurality of arc-shaped connecting pieces to form a containing space of the fan part, the fan part being assembled on the bottom plate, the plurality of arc-shaped connecting pieces being arranged along a circumferential direction of the bottom plate, and an air outlet being formed between two adjacent arc-shaped connecting pieces;

[0011] an outer thread being formed on an outer side of the bottom plate and each arc-shaped connecting piece and extending along an axial direction of the cylinder, and an inner thread connecting ring being threadedly connected with the outer thread, the centrifugal fan assembly being connected at a first through hole of a fixing base by the inner thread connecting ring, and the fan fixing frame being capable of being driven to lift in the first through hole.

[0012] In some embodiments,

[0013] the fan part comprising a driving motor and a centrifugal fan blade, wherein the driving motor comprises a fixing member and a rotating shaft, the driving motor being fixedly connected with the bottom plate by the fixing member, and the centrifugal fan blade being fixedly sleeved on the rotating shaft.

[0014] In some embodiments,

[0015] in the axial direction of the fan fixing frame, the width of each arc-shaped connecting piece from a middle portion to two end portions is increasingly larger.

[0016] In some embodiments,

[0017] The fan fixing frame further comprises a reinforcing ring, each of the arc-shaped connecting pieces is arranged around the outer ring of the reinforcing ring, and the reinforcing ring is connected to the inner side of the middle portion of each of the arc-shaped connecting pieces.

[0018] In some embodiments,

[0019] The two ends of each of the arc-shaped connecting pieces are respectively welded to the top ring and the bottom plate, and / or each of the arc-shaped connecting pieces is welded to the reinforcing ring.

[0020] In some embodiments,

[0021] The middle portion of the inner side of each of the arc-shaped connecting pieces is formed with a first positioning groove extending along the width direction thereof, and the reinforcing ring is connected to the arc-shaped connecting piece through the first positioning groove; and / or,

[0022] The two end portions of the inner side of the arc-shaped connecting piece are in concave-convex positioning connection with the outer edge of the top ring and the outer edge of the bottom plate.

[0023] In some embodiments,

[0024] The top ring is detachably connected with a rotary driving member.

[0025] In some embodiments,

[0026] The rotary driving member has a plurality of rotary driving members, and the plurality of rotary driving members are arranged at intervals along the circumferential direction of the top ring; and / or,

[0027] The rotary driving member is a threaded cylinder, and the rotary driving member is in threaded connection with the top ring.

[0028] In some embodiments,

[0029] The top ring is connected with a riveting nut, and each of the rotary driving members is in threaded connection with the riveting nut; or the top ring is provided with an internally threaded through hole, and each of the rotary driving members is in threaded connection with the internally threaded through hole.

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

[0031] An air conditioner main body, which has a fixed base and the above-mentioned centrifugal fan assembly inside, the centrifugal fan assembly is connected to the first through hole of the fixed base through the internally threaded connecting ring, and the fan fixing frame can be driven to ascend and descend in the first through hole.

[0032] In some embodiments,

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

[0034] The centrifugal fan assembly has a raised position and a lowered position. When the centrifugal fan assembly is in the raised position, it is housed inside the air conditioner body. When the centrifugal fan assembly is in the lowered position, each air outlet of the centrifugal fan assembly is located below the bottom surface of the air conditioner body.

[0035] In some implementations...

[0036] The cabinet air conditioner also includes a guide ring. When the centrifugal fan assembly is in the raised position, the guide ring is connected to the top ring. When the centrifugal fan assembly is in the lowered position, the guide ring is connected to the fixed base.

[0037] In some implementations...

[0038] The top ring also has a plurality of second through holes spaced apart along its circumference. When the centrifugal fan assembly is in the sunken position, the guide ring is connected to the fixed base by means of bolts passing through the guide ring and the second through holes.

[0039] This invention provides a centrifugal fan assembly and a cabinet air conditioner having the same. The outer contour of the fan mounting bracket is a cylinder coaxial with the fan blades of the fan assembly, instead of the square or other angular shapes found in the prior art. This reduces the overall structural size of the centrifugal fan assembly, thereby effectively reducing its space occupation on corresponding assembly components (such as the cabinet air conditioner). More importantly, since the fan mounting bracket in this invention is cylindrical, the aforementioned external threads are constructed on the outer surfaces of each arc-shaped connecting piece and the outer surface of the base plate. This allows the fan mounting bracket to connect with the fixed base via the threaded connection of the internal threaded connecting ring. Thus, the height of the centrifugal fan assembly can be adjusted by the specific thread engagement position between the fan mounting bracket and the internal threaded connecting ring, eliminating the need for a separate structure to control the lifting and lowering of the centrifugal fan assembly. This reduces the number of parts and simplifies the design of the lifting and adjusting structure of the centrifugal fan assembly. Attached Figure Description

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

[0041] Figure 2 for Figure 1 A diagram showing the state of the centrifugal fan assembly in the raised position.

[0042] Figure 3 for Figure 2 A state diagram of the centrifugal fan assembly during the transition from the raised position to the lowered position;

[0043] Figure 4 forFigure 2 A diagram showing the state of the centrifugal fan assembly in the sunken position.

[0044] Figure 5 This is a top view of the centrifugal fan assembly according to an embodiment of the present invention (including the fixed base and the guide ring);

[0045] Figure 6 for Figure 1 A three-dimensional structural diagram of the fan mounting bracket in the image;

[0046] Figure 7 for Figure 6 Exploded view;

[0047] Figure 8 for Figure 6 A magnified view of the top ring in the image;

[0048] Figure 9 for Figure 6 A magnified view of a portion of the base plate;

[0049] Figure 10 for Figure 6 A front view of the curved connecting plate in the middle;

[0050] Figure 11 for Figure 10 Top view;

[0051] Figure 12 for Figure 10 Side view;

[0052] Figure 13 for Figure 1 A cross-sectional view of the internally threaded connecting ring.

[0053] The reference numerals in the attached figures are as follows:

[0054] 1. Fan components;

[0055] 11. Drive motor; 12. Centrifugal fan blades;

[0056] 2. Fan mounting bracket;

[0057] 21. Top ring; 212. Second through hole; 213. Air inlet; 214. Second positioning groove; 22. Base plate; 221. Third positioning groove; 23. Arc-shaped connecting piece; 231. Air outlet; 232. First positioning groove; 233. First step structure; 24. Reinforcing ring;

[0058] 31. External thread;

[0059] 4. Rotary drive components;

[0060] 5. Internal threaded connecting ring;

[0061] 101, fixed base; 102, first through hole; 103, flow guide ring; 104, bolt piece. DETAILED DESCRIPTION

[0062] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions will be clearly and completely described below with reference to the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than 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 protection scope of the present application.

[0063] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0064] Reference should be made to Figures 1 to 13 As shown, according to the embodiments of the present application, a centrifugal fan assembly is provided, comprising:

[0065] The fan component 1 is a centrifugal fan, i.e. the airflow enters the centrifugal fan axially, and exits radially;

[0066] The fan fixing frame 2 is a cylinder coaxial with the rotating shaft of the fan component 1, and comprises a top ring 21, a bottom plate 22, and a plurality of arc-shaped connecting pieces 23. The top ring 21 and the bottom plate 22 are connected by the plurality of arc-shaped connecting pieces 23 to form a containing space for the fan component 1. The top ring 21 is provided with an air inlet 213, through which the fan component 1 can be assembled on the bottom plate 22. The plurality of arc-shaped connecting pieces 23 are arranged along the circumference of the bottom plate 22, and the adjacent two arc-shaped connecting pieces 23 form an air outlet 231. When the fan component 1 is in operation, the airflow enters the containing space through the air inlet 213 and blows out from each air outlet 231.

[0067] The outer side surface of the bottom plate 22 and each arc-shaped connecting piece 23 is provided with an outer thread 31 extending along the axial direction of the cylinder. The inner thread connecting ring 5 is threadedly connected to the outer thread 31. The centrifugal fan assembly is connected to the first through hole 102 of the fixed base 101 through the inner thread connecting ring 5. The fan fixing frame 2 can be driven to ascend and descend in the first through hole 102. In a specific application, the inner thread connecting ring 5 has an outwardly turned plate structure, which realizes the detachable connection between the fixed base 101. The aforementioned outer side surface is the side corresponding to the component away from the central axis of the cylinder, and conversely, the side close to the central axis of the cylinder is the inner side surface.

[0068] In the technical solution, the outer contour of the fan fixing frame 2 is a cylindrical shape coaxial with the fan blade of the fan assembly, instead of a square shape with edges 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 assembly component (for example, a cabinet air conditioner). More importantly, since the fan fixing frame 2 in the present application is cylindrical, the outer thread 31 is formed on the outer side surface of each arc-shaped connecting piece 23 and the outer side surface of the bottom plate 22, so that the fan fixing frame 2 can be connected with the fixed base 101 through the threaded connection of the inner threaded connecting ring 5. In this way, the height of the centrifugal fan assembly can be adjusted by the specific threaded matching position of the fan fixing frame 2 and the inner threaded connecting ring 5, 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.

[0069] It should be noted that in the technical solution, the inner threaded connecting ring 5 is used as a connecting component between the fan fixing frame 2 and the fixed base 101, which can reduce the difficulty of machining the inner thread directly on the hole wall of the first through hole 102 of the fixed base 101.

[0070] In a specific embodiment, the fan component 1 includes a driving motor 11 and a centrifugal fan blade 12, wherein the driving motor 11 includes a fixing member and a rotating shaft, and the driving motor 11 is fixedly connected to the bottom plate 22 through the fixing member, 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 that form reliable connections with the fixing member.

[0071] In the technical solution, the driving motor 11 is fixedly connected to the bottom plate 22, away from the air inlet 213, effectively preventing the driving motor 11 from obstructing the air flow of the fan.

[0072] In some embodiments,

[0073] For reference, Figure 6 , Figure 7 and Figure 10 As shown in the drawings, in the axial direction of the fan fixing frame 2, the width of each arc-shaped connecting piece 23 from the middle portion to the end portion is getting larger and larger. It can be understood that the actual position of the centrifugal fan blade 12 corresponds to the aforementioned middle portion.

[0074] In the technical solution, the middle narrow and both ends wide of the arc-shaped connecting piece 23 makes the maximum flow area position of the air outlet 231 formed between the adjacent two arc-shaped connecting pieces 23 coincide with the actual air outlet position of the centrifugal fan blade 12, which can ensure the maximization of the air outlet while achieving a higher connection strength of the arc-shaped connecting piece 23, and can reduce the resistance of the air flow as much as possible.

[0075] With reference to Figure 7 As shown in the preferred embodiment, the fan fixing frame 2 further comprises a reinforcing ring 24, each arc-shaped connecting piece 23 is arranged around the outer ring of the reinforcing ring 24, and the reinforcing ring 24 is connected to the inner side of the middle part of each arc-shaped connecting piece 23.

[0076] In the technical solution, the reinforcing ring 24 can enhance the structural strength of the middle part of each arc-shaped connecting piece 23, at this time, the width of the middle part of each arc-shaped connecting piece 23 can be designed to be smaller, and thus the flow area of the air outlet 231 can be further increased.

[0077] In some embodiments, the two ends of each arc-shaped connecting piece 23 are respectively welded to the top ring 21 and the bottom plate 22, when the external dimension of the centrifugal fan assembly is large, the welding connection mode can reduce the manufacturing difficulty of the fan fixing frame 2. In another preferred embodiment, each arc-shaped connecting piece 23 is welded to the reinforcing ring 24, which improves the connection reliability between the two.

[0078] In order to facilitate the welding process of the overall structure of the fan fixing frame 2, in some embodiments, with reference to Figures 10 to 12 As shown, the middle part of the inner side of each arc-shaped connecting piece 23 is formed with a first positioning groove 232 extending along the width direction thereof, and the reinforcing ring 24 is connected to the arc-shaped connecting piece 23 through the first positioning groove 232; and / or, the two end portions of the inner side of the arc-shaped connecting piece 23 are in concave-convex positioning connection with the outer edge of the top ring 21 and the outer edge of the bottom plate 22.

[0079] Specifically, at least one end position of the arc-shaped connecting piece 23 is formed with a first step structure 233, and correspondingly, the outer edge of the top ring 21 is configured with a second positioning groove 214 (as Figure 8 As shown), and the outer edge of the bottom plate 22 is configured with a third positioning groove 221 (as Figure 9 As shown), so that when welding, the end portion of the arc-shaped connecting piece 23 can be clamped in the corresponding positioning groove to achieve preliminary positioning, thereby greatly facilitating the welding connection process of the two.

[0080] With reference to Figure 6 As shown, in some embodiments, the top ring 21 is detachably connected with a rotary driving member 4, and the user can rotate the centrifugal fan assembly by applying force to the rotary driving member 4, thereby achieving the lifting adjustment of the centrifugal fan assembly.

[0081] The rotary driving member 4 has a plurality of rotary driving members 4, and the plurality of rotary driving members 4 are arranged at intervals along the circumferential direction of the top ring 21, preferably uniformly arranged, specifically as Figure 5As shown, in this specific embodiment, the aforementioned rotating driving members 4 are designed as four, which are arranged along the circumference of the top ring 21 at intervals, so that the user can rotate different rotating driving members 4 according to actual needs, which is especially suitable for the working condition that the diameter of the top ring 21 is large, and the user can realize the rotation of the centrifugal fan assembly by a plurality of turns in place without moving a large displacement.

[0082] Continuing to refer to Figure 6 As shown, the rotating driving member 4 is a threaded cylinder, and the rotating driving member 4 is threadedly connected with the top ring 21, so that the rotating driving member 4 in the application can be used as a force applying member and a connecting member at the same time. Specifically, as described below, when the centrifugal fan assembly in 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 to the top ring 21 through the rotating driving member 4, which makes the flow guide ring 103 reliably placed during the transportation of the cabinet air conditioner.

[0083] In a specific embodiment, a riveting nut is connected to the top ring 21, and each rotating driving member 4 is threadedly connected with the riveting nut; or, an internally threaded through hole (not labeled in the figure) is formed on the top ring 21, and each rotating driving member 4 is threadedly connected with the internally threaded through hole.

[0084] In this technical solution, the riveting nut in the application can be very conveniently connected to the top ring 21 and is suitable for the case that the thickness of the top ring 21 is small. For example, the top ring 21 can be formed by a sheet metal part, and the arrangement does not cause deformation of the sheet metal part, while it can increase the screwing depth of the rotating driving member 4 and the top ring 21, and improve the reliability of the connection therebetween. When the thickness of the top ring 21 is large, the aforementioned internally threaded through hole can be directly formed.

[0085] According to the embodiments of the application, a cabinet air conditioner is also provided, which comprises:

[0086] The air conditioner body (not shown in the figure) has the fixed base 101 and the aforementioned centrifugal fan assembly inside, and the centrifugal fan assembly is connected to the first through hole 102 of the fixed base 101 through the internally threaded connecting ring 5, and the fan fixing frame 2 can be driven to ascend and descend in the first through hole 102.

[0087] In this technical solution, the aforementioned external thread 31 is formed on the outer side surface of each arc-shaped connecting piece 23 and the outer side surface of the bottom plate 22, so that the fan fixing frame 2 can be threadedly connected with the corresponding fixed base 101 through the internally threaded connecting ring 5. In this way, the height of the centrifugal fan assembly can be adjusted by the specific thread cooperation position of the fan fixing frame 2 and the internally threaded connecting ring 5, without separately arranging a structure for controlling the ascending and descending of the centrifugal fan assembly, thereby reducing the parts and simplifying the design of the ascending and descending adjustment structure of the centrifugal fan assembly.

[0088] In some embodiments,

[0089] The fixed base 101 is at the bottom of the air conditioner body;

[0090] 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. In this state, the bottom of the air conditioner 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 in the area below the bottom surface of the air conditioner body. In this state, when the centrifugal fan assembly is running, the sunken air outlet of the cabinet air conditioner is realized.

[0091] It should be noted that the cabinet air conditioner is widely used in scenarios such as data centers. There are a large number of data processing devices in the data center space. 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 interior of each data processing device from the bottom opening of the device to form more effective cooling from the inside out.

[0092] For reference Figures 1 to 4 In some embodiments, the cabinet air conditioner further comprises a flow guide ring 103. When the centrifugal fan assembly is in the raised position, the flow guide ring 103 is connected with the top ring 21. When the centrifugal fan assembly is in the sunken position, the flow guide ring 103 is connected with the fixed base 101. The arrangement of the flow guide ring 103 can straighten the airflow at the aforementioned air inlet 213, reduce the air inlet resistance, and ensure the smoothness and amount of air inlet. In this technical solution, when the centrifugal fan assembly is in the raised position, the flow guide ring 103 is connected with the top ring 21 through the rotary drive member 4 or the bolt member 104, which fixes the position of the flow guide ring 103 during 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 airflow can enter the centrifugal fan assembly through the flow guide ring 103 to the greatest extent and be sent out.

[0093] In one specific embodiment, the top ring 21 also has a plurality of second through holes 212 spaced apart circumferentially thereon. When the centrifugal fan assembly is in the sunken position, the guide ring 103 is connected to the fixed base 101 by bolts 104 and / or a rotary drive 4 passing through the second through holes 212. This technical solution can simultaneously position the top ring 21 and the fixed base 101 while positioning the guide ring 103, thereby reliably locking the angular displacement (position) of the centrifugal fan assembly, making the structure more reliable. The aforementioned bolts 104 can be, for example, self-tapping screws. In another embodiment, after the centrifugal fan assembly is in the sunken position, the rotary drive 4 is individually threaded onto the fixed base 101 for reuse during subsequent height adjustments of the centrifugal fan assembly, preventing it from being scattered or lost.

[0094] In a preferred embodiment, when the centrifugal fan assembly is in the sunken position, a sealing ring (preferably a rubber ring, not shown in the figure) is clamped between the top ring 21 and the fixed base 101 to prevent air leakage. This is because the air pressure at the outlet of the centrifugal fan is high, and the seal between the top ring 21 and the fixed base 101 may not be complete, so air leakage may occur. The sealing ring can prevent air leakage.

[0095] Please see Figures 2 to 4 As shown, the lowering and raising operation steps of the centrifugal fan assembly of the present invention will be described below:

[0096] Operating procedures for lowering the centrifugal fan assembly:

[0097] like Figure 2 As shown, before leaving the factory, the threaded section of the bolt post (i.e., the rotary drive component 4 mentioned above, the same below) passes through the bolt through hole of the guide ring 103 and is screwed into the internal thread bolt hole (i.e., the internal thread through hole mentioned above, the same below) on the top ring 21 of the centrifugal fan assembly. The internal thread connecting ring 5 is fixed to the base (i.e., the fixed base 101 mentioned above, the same below) by other fasteners. At this time, the internal thread connecting ring 5 is located at the lower part of the centrifugal fan assembly, and the centrifugal fan assembly is located inside the cabinet air conditioner. Before lowering, loosen the bolt post and remove the guide ring (otherwise, when lowering to near the base, the guide ring will interfere with the head of the fastener of the internal thread connecting ring 5, thus preventing it from lowering completely). Then, re-fix the bolt post in the bolt hole of the top ring of the centrifugal fan assembly, hold the bolt post and apply force to rotate the centrifugal fan assembly to lower it (e.g., Figure 3After the centrifugal fan assembly is lowered to the desired position, the fasteners of the inner threaded connecting ring 5 are loosened, the bolt posts on the top ring 21 are loosened, and the hole positions of the flow guide ring 103 are aligned with the bolt holes of the base. The flow guide ring 103 is placed in position, and other fasteners (i.e., the bolt members 104 described above) are sequentially passed through the bolt through holes of the flow guide ring 103 and the bolt through holes of the inner threaded connecting ring 5 to be fastened to the bolt holes of the base. The bolt posts are passed through the bolt through holes of the flow guide ring again to be fastened to the bolt holes of the top ring of the centrifugal fan assembly. Thus, the lowering step is completed (as shown in FIG. 4). Figure 4 The second use of the bolt posts ensures that they are not lost, and can be reused when the centrifugal fan assembly needs to be raised next time.

[0098] Operation steps for raising the centrifugal fan assembly:

[0099] When the centrifugal fan assembly needs to be raised, the other fasteners between the flow guide ring 103 and the base are loosened, the bolt posts between the flow guide ring and the top ring of the centrifugal fan assembly are loosened and the flow guide ring is removed. The inner threaded connecting ring 5 is fastened to the base again using fasteners, and the bolt posts are fastened to the bolt holes of the top ring again. Then, the bolt posts holding the centrifugal fan assembly are rotated in the reverse direction to apply force to the centrifugal fan assembly to raise it until the centrifugal fan assembly is raised to the desired position or is separated from the base. Finally, the fasteners are removed to loosen the inner threaded connecting ring 5 from the base. Thus, the raising and separating step of the centrifugal fan assembly is completed.

[0100] The fasteners are default bolts, and self-tapping screws can be used instead.

[0101] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "illustrative 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 illustrative description of the above terms does not necessarily mean 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.

[0102] Although the 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 the embodiments without departing from the principles and spirit 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 top ring (21), a bottom plate (22), and a plurality of arc-shaped connecting pieces (23), the top ring (21) and the bottom plate (22) being connected by the plurality of arc-shaped connecting pieces (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 arc-shaped connecting pieces (23) being arranged along a circumferential direction of the bottom plate (22) and spaced apart from each other, and an air outlet (231) being formed between any two adjacent arc-shaped connecting pieces (23); an outer thread (31) is formed on an outer side surface of the bottom plate (22) and each arc-shaped connecting piece (23) and extends along an axial direction of the cylinder, and an inner thread connecting ring (5) is threadedly connected to the outer thread (31), the centrifugal fan assembly being connected to a first through hole (102) of a fixed base (101) through the inner thread connecting ring (5), and the fan fixing frame (2) being capable of being driven to ascend and descend in the first through hole (102).

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) comprising a fixing member and a rotating shaft, the driving motor (11) being fixedly connected to the bottom plate (22) through the fixing member, and the centrifugal fan blade (12) being fixedly sleeved on the rotating shaft.

3. The centrifugal fan assembly according to claim 2, wherein in an axial direction of the fan fixing frame (2), a width of each arc-shaped connecting piece (23) from a middle portion to two end portions thereof is gradually increased.

4. The centrifugal fan assembly according to claim 3, wherein the fan fixing frame (2) further comprises a reinforcing ring (24), each arc-shaped connecting piece (23) being arranged around an outer ring of the reinforcing ring (24), and the reinforcing ring (24) being connected to an inner side surface of a middle portion of each arc-shaped connecting piece (23).

5. The centrifugal fan assembly according to claim 4, wherein two ends of each arc-shaped connecting piece (23) are respectively welded to the top ring (21) and the bottom plate (22), and / or each arc-shaped connecting piece (23) is welded to the reinforcing ring (24).

6. The centrifugal fan assembly according to claim 5, wherein a middle portion of an inner side surface of each arc-shaped connecting piece (23) is formed with a first positioning groove (232) extending along a width direction thereof, and the reinforcing ring (24) is connected to the arc-shaped connecting piece (23) through the first positioning groove (232); and / or two end portions of the inner side surface of each arc-shaped connecting piece (23) are in positionally connected to an outer edge of the top ring (21) and an outer edge of the bottom plate (22) in a concave-convex manner.

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

8. The centrifugal fan assembly according to claim 7, wherein the rotating driving member (4) is provided in plurality along the circumference of the top ring (21); and / or the rotating driving member (4) is a threaded cylinder, and is screwed with the top ring (21).

9. The centrifugal fan assembly according to claim 7, wherein the top ring (21) is provided with a rivet nut, and each rotating driving member (4) is screwed with the rivet nut; or the top ring (21) is provided with an internally threaded through hole, and each rotating driving member (4) is screwed with the internally threaded through hole.

10. An air conditioner comprising: an air conditioner body, and the centrifugal fan assembly according to any one of claims 1 to 9, wherein the centrifugal fan assembly is connected to the first through hole (102) of the fixed base (101) through the internally threaded connecting ring (5), and the fan fixing frame (2) can be driven to rise and fall in the first through hole (102).

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, further comprising a flow guide ring (103), wherein when the centrifugal fan assembly is in the raised position, the flow guide ring (103) is connected with the top 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).

10. A cabinet air conditioner characterized by comprising:

13. The cabinet air conditioner according to claim 12, wherein the top ring (21) is further provided with a plurality of second through holes (212) arranged along the circumference thereof, and 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 second through holes (212) with a bolt member (104). ​ ​ ​ ​ ​ ​ ​ ​

Images