Limit support device, fan and air conditioner

Abstract

The present invention provides a position limiting support device, a fan and an air conditioner. The position limiting support device comprises: a first support frame, the first support frame is used to place a driving part; a fixed support frame, the fixed support frame is connected to the first support frame and is pressed on the axial end face of the driving part, and the fixed support frame is used to axially limit the driving part; a second support frame, the second support frame is connected to the first support frame and is pressed on the fixed support frame, and the second support frame is used to circumferentially limit the driving part. The technical solution of the present invention solves the problem that the position limiting support device in the prior art only limits the axial direction of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a position limiting support device, a fan and an air conditioner. Background Art

[0002] The fan in the related art includes a motor, a limit support device and an impeller. The motor is installed on the limit support device, and the motor shaft of the motor is connected to the hub of the impeller to drive the impeller to rotate.

[0003] However, the limit support device in the related technology only limits the axial direction of the motor. When the motor shaft of the motor is connected to the impeller hub and the connection position between the motor shaft and the hub is not the center of gravity of the impeller, the impeller will shake greatly during rotation, resulting in poor dynamic balance of the impeller, affecting the reliability and efficiency of the fan. Summary of the invention

[0004] The main purpose of the present invention is to provide a position limiting support device, a fan and an air conditioner to solve the problem that the position limiting support device in the prior art only limits the axial direction of the motor.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a limiting support device is provided, including: a first support frame, the first support frame is used to place a driving part; a fixed support frame, the fixed support frame is connected to the first support frame and is pressed on the axial end face of the driving part, and the fixed support frame is used to axially limit the driving part; a second support frame, the second support frame is connected to the first support frame and is pressed on the fixed support frame, and the second support frame is used to circumferentially limit the driving part.

[0006] Furthermore, the fixed bracket has a clearance space arranged opposite to the circumferential surface of the driving part; the second support frame includes a protrusion, which is located in the clearance space and extends toward the circumferential surface of the driving part, and the protrusion has a limiting end surface, which is arranged opposite to the circumferential surface of the driving part to limit the circumferential surface of the driving part.

[0007] Furthermore, there are a plurality of clearance spaces, which are arranged at intervals around the circumference of the driving part; there are a plurality of protrusions, which are arranged in a one-to-one correspondence with the plurality of clearance spaces.

[0008] Furthermore, the fixed bracket includes: a pressing plate; a supporting arm, wherein a plurality of supporting arms are arranged at intervals around the circumference of the pressing plate, and a clearance space is formed between two adjacent supporting arms.

[0009] Furthermore, the support arm includes a first support section and a second support section that are connected to each other, the first support section is connected to the pressure plate and extends along the axial direction of the driving part, the second support section extends along the radial direction of the driving part, and the second support section has a first connecting hole; the first support frame has a second connecting hole arranged opposite to the first connecting hole; the limiting support device also includes a first fastener, the first fastener is passed through the first connecting hole and the second connecting hole to fix the fixed bracket to the first support frame.

[0010] Furthermore, along the axial direction of the driving part, the second support frame includes a first support portion and a second support portion connected to each other, and the radial dimension of the first support portion is smaller than the radial dimension of the second support portion; the first support portion has a first accommodating space, and the first support portion is covered on the fixed bracket through the first accommodating space, and a plurality of protrusions are arranged around the circumference of the first support portion and protrude toward one side of the first accommodating space; the second support portion has a second accommodating space, and the second support portion is covered on the first support frame through the second accommodating space.

[0011] Furthermore, an annular mounting plane is formed at the connection between the first support portion and the second support portion; a third connecting hole is provided on the mounting plane; a fourth connecting hole arranged opposite to the third connecting hole is provided on the first support frame; the limiting support device also includes a second fastener, which is passed through the third connecting hole and the fourth connecting hole to fix the second support frame to the first support frame.

[0012] Furthermore, along the axial direction of the first support frame, the first support frame includes a first end and a second end arranged opposite to each other, and a mounting groove is provided on the first end face of the first end, and the mounting groove is used to place the driving part; a second connecting hole is provided on the first end face, and a plurality of second connecting holes are arranged at intervals around the outer peripheral side of the mounting groove; a fourth connecting hole is also provided on the first end face, and a plurality of fourth connecting holes are arranged at intervals around the outer peripheral side of the mounting groove.

[0013] Furthermore, a second connection hole is arranged between two adjacent second connection holes.

[0014] Furthermore, the second end of the first support frame has a flange, the flange extends in the radial direction of the first support frame, and a first mounting hole for connecting to the mounting base is provided on the flange.

[0015] Furthermore, the second end of the first support frame has a protruding structure connected to the flange, and the protruding structure extends toward the first end of the first support frame; and the end of the second support portion away from the first support portion has a clearance notch adapted to the protruding structure.

[0016] Furthermore, the second support frame also includes: a connecting arm, a plurality of connecting arms are arranged at intervals around the circumference of the second support portion; and a second mounting hole for connecting to the mounting base is provided on the connecting arm.

[0017] Furthermore, the driving part is a motor; the fixed bracket is provided with an avoidance hole for the motor shaft of the driving part to extend out; the second support frame is provided with a clearance hole for the motor shaft of the driving part to extend out.

[0018] Furthermore, the fixing bracket is a sheet metal part; the first supporting frame and / or the second supporting frame are integrally injection molded.

[0019] According to another aspect of the present invention, a fan is provided, comprising: a limit support device, the limit support device is the above-mentioned limit support device; a driving part, the driving part is a motor, and the driving part is installed on a first support frame of the limit support device; a fixed bracket of the limit support device and a second support frame of the limit support device are both connected to the first support frame and limit the driving part; an impeller, the impeller includes a hub, and the hub is connected to the motor shaft of the motor.

[0020] Furthermore, the impeller includes mixed flow blades arranged on a hub; the outer diameter of the hub gradually increases in a direction away from the limiting support device, and the small diameter end of the hub is connected to the motor shaft.

[0021] According to another aspect of the present invention, an air conditioner is provided, comprising the above-mentioned fan.

[0022] Furthermore, the air conditioner includes: a shell having an upper air port and a lower air port, and a fan is arranged in the shell; a heat exchanger, the heat exchanger is arranged in the air conditioner, the fan can introduce the airflow outside the shell into the shell through the upper air port, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the lower air port, or the fan can introduce the airflow outside the shell into the shell through the lower air port, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the upper air port.

[0023] By applying the technical solution of the present invention, a second support frame is added for limiting the circumference of the driving part, so that the limiting support device can limit the axial direction of the driving part as well as the circumference of the driving part, thereby effectively preventing the driving part from shaking greatly relative to the limiting support device. Since the position of the driving part is relatively fixed, the position of the impeller connected thereto is also relatively fixed, thereby effectively preventing the impeller of the fan from shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 A schematic diagram of a front cross-sectional structure of a fan according to an optional embodiment of the present invention is shown;

[0026] Figure 2 Shows Figure 1A schematic diagram of a cross-sectional structure of a fan in a top view;

[0027] Figure 3 Shows Figure 1 Schematic diagram of the disassembled structure of the fan;

[0028] Figure 4 Shows Figure 3 A schematic structural diagram of a second support frame of the position limiting support device;

[0029] Figure 5 Shows Figure 3 A schematic diagram of the structure of a fixed bracket of the position limiting support device;

[0030] Figure 6 Shows Figure 3 A schematic structural diagram of the first support frame of the limiting support device in FIG.

[0031] The above drawings include the following reference numerals:

[0032] 100, limit support device; 10, first support frame; 11, second connection hole; 12, fourth connection hole; 13, mounting groove; 14, flange; 141, first mounting hole; 15, protruding structure; 20, fixed bracket; 210, clearance space; 21, pressure plate; 211, avoidance hole; 22, support arm; 221, first support section; 222, second support section; 223, first connection hole; 30, second support frame; 31, protruding part; 311, limiting end face; 32, first supporting part; 321, first accommodating space; 322, making way hole; 33, second supporting part; 331, second accommodating space; 332, making way gap; 34, mounting plane; 341, third connecting hole; 35, connecting arm; 351, second mounting hole; 200, driving part; 201, circumferential surface; 202, motor shaft; 300, impeller; 301, hub; 302, mixed flow blade. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to solve the problem that the limiting support device in the prior art only limits the axial direction of the motor, the present invention provides a limiting support device, a fan and an air conditioner.

[0035] like Figures 1 to 6 As shown, the limiting support device includes a first support frame 10, a fixed support frame 20 and a second support frame 30. The first support frame 10 is used to place the driving part 200. The fixed support frame 20 is connected to the first support frame 10 and pressed on the axial end face of the driving part 200. The fixed support frame 20 is used to axially limit the driving part 200. The second support frame 30 is connected to the first support frame 10 and pressed on the fixed support frame 20. The second support frame 30 is used to circumferentially limit the driving part 200.

[0036] In this embodiment, a second support frame 30 is added to limit the circumferential direction of the driving unit 200, so that the limiting support device can limit the axial direction of the driving unit 200 and the circumferential direction of the driving unit 200, thereby effectively preventing the driving unit 200 from shaking significantly relative to the limiting support device. Since the position of the driving unit 200 is relatively fixed, the position of the impeller 300 connected thereto is also relatively fixed, thereby effectively preventing the impeller 300 of the fan from shaking.

[0037] like Figure 1 and Figure 2 As shown, the fixed bracket 20 has a clearance space 210 arranged opposite to the circumferential surface 201 of the driving part 200; the second support frame 30 includes a protrusion 31, the protrusion 31 is located in the clearance space 210 and extends toward the circumferential surface 201 of the driving part 200, and the protrusion 31 has a limiting end surface 311, and the limiting end surface 311 is arranged opposite to the circumferential surface 201 of the driving part 200 to limit the circumferential surface 201 of the driving part 200.

[0038] In this way, when the driving unit 200 is installed in the limiting support device, the driving unit 200 is first placed on the first support frame 10, and then the fixed support frame 20 is connected to the first support frame 10 and pressed on the axial end face of the main body of the driving unit 200, so that it limits the axial position of the driving unit 200, and then the second support frame 30 is connected to the first support frame 10 and pressed on the fixed support frame 20, and the protrusion 31 of the second support frame 30 extends into the clearance space 210 of the first support frame 10 and then extends toward the circumferential surface 201 of the driving unit 200, and the limiting end face 311 of the protrusion 31 is used to limit the circumference of the driving unit 200.

[0039] like Figure 2As shown, there are a plurality of clearance spaces 210, and the plurality of clearance spaces 210 are arranged at intervals around the circumference of the driving part 200; there are a plurality of protrusions 31, and the plurality of protrusions 31 are arranged one-to-one corresponding to the plurality of clearance spaces 210. By increasing the number of protrusions 31, the total area of ​​the plurality of limiting end surfaces 311 of the second support frame 30 for limiting the circumferential surface of the driving part 200 is increased, thereby improving the effect of the second support frame 30 on limiting the circumferential position of the driving part 200.

[0040] Optionally, the limiting end surface 311 is clearance-matched with the circumferential surface 201 of the driving part 200, and by adjusting the size of the gap therebetween, it is ensured that the second support frame 30 reliably limits the circumferential position of the driving part 200, while avoiding interference between the second support frame 30 and the circumferential surface 201 of the driving part 200 during assembly.

[0041] like Figure 3 and Figure 5 As shown, the fixed bracket 20 includes a pressing plate 21 and a support arm 22. A plurality of support arms 22 are arranged at intervals around the circumference of the pressing plate 21, and a clearance space 210 is formed between two adjacent support arms 22. The fixed bracket 20 is connected to the first support bracket 10 through the support arm 22. The fixed bracket 20 is pressed on the axial end face of the main body of the driving part 200 through the pressing plate 21, thereby limiting the axial direction of the driving part 200. The fixed bracket 20 provided in this embodiment has the advantages of simple structure and easy installation.

[0042] like Figure 5 As shown, the support arm 22 includes a first support segment 221 and a second support segment 222 connected to each other. The first support segment 221 is connected to the pressure plate 21 and extends along the axial direction of the driving part 200. The second support segment 222 extends along the radial direction of the driving part 200. The second support segment 222 has a first connection hole 223. The first support frame 10 has a second connection hole 11 arranged opposite to the first connection hole 223. The position-limiting support device also includes a first fastener, which is inserted through the first connection hole 223 and the second connection hole 11 to fix the fixed bracket 20 to the first support frame 10. In this way, the fixed bracket 20 and the first support frame 10 are detachably connected by the first fastener, which is convenient for the subsequent replacement, maintenance or repair of the driving part 200.

[0043] like Figure 3 and Figure 4As shown, along the axial direction of the driving part 200, the second support frame 30 includes a first support portion 32 and a second support portion 33 connected to each other, and the radial dimension of the first support portion 32 is smaller than the radial dimension of the second support portion 33; the first support portion 32 has a first accommodating space 321, and the first support portion 32 is covered on the fixed support 20 through the first accommodating space 321, and a plurality of protrusions 31 are arranged around the circumference of the first support portion 32 and protrude toward one side of the first accommodating space 321; the second support portion 33 has a second accommodating space 331, and the second support portion 33 is covered on the first support frame 10 through the second accommodating space 331. The first support portion 32 can limit the circumference of the fixed support 20, and the second support portion 33 can limit the circumference of the first support frame 10, thereby further improving the overall stability of the assembled driving part 200 and the limiting support device.

[0044] like Figure 4 As shown, a ring-shaped mounting plane 34 is formed at the connection between the first support portion 32 and the second support portion 33; a third connecting hole 341 is provided on the mounting plane 34; a fourth connecting hole 12 arranged opposite to the third connecting hole 341 is provided on the first support frame 10; the position-limiting support device also includes a second fastener, which is passed through the third connecting hole 341 and the fourth connecting hole 12 to fix the second support frame 30 with the first support frame 10. In this way, the second support frame 30 and the first support frame 10 are detachably connected through the second fastener, which is convenient for the subsequent replacement, maintenance or repair of the driving part 200; and the third connecting hole 341 is provided on the mounting plane 34 at the connection between the first support portion 32 and the second support portion 33, which is conducive to the stable connection between the first support frame 10 and the second support frame 30.

[0045] like Figure 3 and Figure 6 As shown, along the axial direction of the first support frame 10, the first support frame 10 includes a first end and a second end that are arranged oppositely, and a first end surface of the first end is provided with a mounting groove 13, and the mounting groove 13 is used to place the driving part 200; a second connecting hole 11 is provided on the first end surface, and a plurality of second connecting holes 11 are arranged at intervals around the outer circumference of the mounting groove 13; a fourth connecting hole 12 is also provided on the first end surface, and a plurality of fourth connecting holes 12 are arranged at intervals around the outer circumference of the mounting groove 13. When the driving part 200 is placed on the first support frame 10, the mounting groove 13 can limit the installation position of the driving part 200, which is conducive to improving the assembly efficiency between the driving part 200 and the first support frame 10; in addition, the mounting groove 13 includes a rotation-stopping groove section, and a rotation-stopping protrusion is also provided on the main body of the driving part 200, and the rotation-stopping groove section is adapted to the rotation-stopping protrusion, so that when the driving part 200 is installed at the mounting groove 13, the driving part 200 and the first support frame 10 will not rotate relative to each other, further improving the overall stability of the fan.

[0046] like Figure 6 As shown, a second connection hole 11 is provided between two adjacent second connection holes 11. The space of the installation plane 34 is reasonably utilized to improve the connection stability between the first support frame 10, the fixing bracket 20 and the second support frame 30.

[0047] like Figure 6 As shown, the second end of the first support frame 10 has a flange 14, which extends radially along the first support frame 10, and a first mounting hole 141 for connecting with the mounting base is provided on the flange 14. In this way, the first support frame 10 can be installed in conjunction with the mounting base of other structures through the first mounting hole 141.

[0048] like Figure 6 As shown, the second end of the first support frame 10 has a protruding structure 15 connected to the flange 14, and the protruding structure 15 extends toward the first end of the first support frame 10; the end of the second support portion 33 away from the first support portion 32 has a clearance notch 332 adapted to the protruding structure 15. In this way, the positioning and matching of the protruding structure 15 and the clearance notch 332 are used to facilitate the rapid assembly of the first support frame 10 and the second support frame 30. In addition, the protruding structure 15 can also play a role in stopping rotation, preventing the first support frame 10 and the second support frame 30 from rotating relative to each other, further improving the overall stability of the fan.

[0049] like Figure 4 As shown, the second support frame 30 further includes a connecting arm 35, and a plurality of connecting arms 35 are arranged at intervals around the circumference of the second support portion 33; the connecting arm 35 is provided with a second mounting hole 351 for connecting with the mounting base. In this way, the second support frame 30 is installed in cooperation with the mounting base of other structures through the second mounting hole 351.

[0050] Optionally, the second support portion 33 has a stop surface extending radially thereof, and the stop surface cooperates with the direction of the flange 14 or the stopper of the protruding structure 15 to limit the axial relative position between the first support frame 10 and the second support frame 30, further ensuring a reliable connection between the first support frame 10 and the second support frame 30.

[0051] Optionally, the second mounting hole 351 extends along the axial direction of the driving unit 200, and the first mounting hole 141 extends along the radial direction of the driving unit 200, so that when the limit support device is installed in conjunction with other structures, the limit support device is limited in both the axial and radial directions of the driving unit 200. Since the position of the limit support device is fixed, the position of the driving unit 200 is fixed, and then the position of the impeller 300 is also fixed, which more effectively prevents the impeller 300 of the fan from shaking.

[0052] like Figure 3 As shown, the driving unit 200 is a motor; Figure 5As shown, the fixing bracket 20 is provided with an escape hole 211 for the motor shaft 202 of the driving unit 200 to extend out; Figure 4 As shown, the second support frame 30 is provided with a clearance hole 322 for the motor shaft 202 of the driving part 200 to extend out. The motor shaft 202 of the motor extends out of the limit support device and is connected to the hub 301 of the impeller 300.

[0053] Optionally, the fixed bracket 20 is a sheet metal part, and the first support frame 10 and / or the second support frame 30 are integrally injection molded. The sheet metal part has good mechanical properties such as stiffness and strength, and can stably and reliably limit the axial direction of the driving part 200. Since the structures of the first support frame 10 and the second support frame 30 are relatively complex, the integral injection molding of the first support frame 10 and the second support frame 30 can facilitate the molding process of the first support frame 10 and the second support frame 30, and reduce the processing cost of the first support frame 10 and the second support frame 30. In addition, if the first support frame 10 and the second support frame 30 come into contact and collide with the driving part 200 or the fixed bracket 20, the contact and collision between plastic and metal is not easy to produce noise, which is conducive to reducing the operating noise of the fan, and then to reducing the operating noise of the air conditioner.

[0054] Optionally, the protrusion 31 is formed in the form of concave-convex ribs.

[0055] According to another aspect of the present application, the present application also provides a fan, such as Figures 1 to 3 As shown, the fan includes a limit support device 100, a driving unit 200 and an impeller 300. The limit support device is the above-mentioned limit support device, the driving unit 200 is a motor, and the driving unit 200 is installed on the first support frame 10 of the limit support device 100; the fixed bracket 20 of the limit support device 100 and the second support frame 30 of the limit support device 100 are both connected to the first support frame 10 and limit the driving unit 200, and the impeller 300 includes a hub 301, and the hub 301 is connected to the motor shaft 202 of the motor. Since the limit support device provided by the present application can reliably limit the axial and circumferential directions of the motor, the impeller 300 rotates smoothly and reliably during the operation of the fan, and is not prone to shaking, thereby improving the performance of the fan. The present application solves the problem of dynamic balance of the fan by optimizing the structure of the limit support device 100 that limits the driving unit 200.

[0056] like Figure 1As shown, the impeller 300 includes a mixed flow blade 302 arranged on a hub 301; the outer diameter of the hub 301 gradually increases in the direction away from the limiting support device, and the small diameter end of the hub 301 is connected to the motor shaft 202. In this embodiment, the position where the impeller 300 is connected to the motor shaft 202 is not the center of gravity of the impeller 300, and the impeller 300 is prone to shaking during rotation. Since the limiting support device in the related art only limits the axial direction of the motor, the motor shakes with the impeller 300, and the limiting support device provided in the present application can also limit the circumferential direction of the motor, so that the motor cannot shake with the impeller 300, and the impeller 300 is correspondingly prevented from shaking.

[0057] The mixed flow blades 302 enable the fan to have both the effect of axial flow working air outlet and the effect of centrifugal air outlet, thereby improving the performance of the fan.

[0058] According to another aspect of the present application, the present application also provides an air conditioner, including the above-mentioned fan. Since the impeller 300 of the fan provided by the present application does not shake during operation, has good stability, and is not prone to noise, when the fan is used in the air conditioner, the air conditioner has the advantages of good stability and is not prone to noise.

[0059] Optionally, the air conditioner includes a shell and a heat exchanger, the shell has an upper air outlet and a lower air outlet, the fan is arranged in the shell, the heat exchanger is arranged in the air conditioner, the fan can introduce the airflow outside the shell into the shell through the upper air outlet, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the lower air outlet, or the fan can introduce the airflow outside the shell into the shell through the lower air outlet, perform heat exchange with the heat exchanger, and then discharge it outside the shell through the upper air outlet. The air conditioner provided in the present application has two operating modes, and the user can choose upper air outlet or lower air outlet according to actual needs, thereby improving the use effect of the air conditioner.

[0060] Optionally, when the air conditioner is in cooling mode, the air conditioner is in upward air outlet mode to avoid cold air blowing directly on the user, avoid affecting the health of the user, and help improve the user's experience; when the air conditioner is in heating mode, the air conditioner is in downward air outlet mode, using the principle of hot air moving upward and cold air moving downward to heat the indoor temperature, thereby improving the heating effect of the air conditioner and making the user's feet feel warm, which is conducive to further improving the user's experience.

[0061] Optionally, the air conditioner also has an air duct switching mechanism, which is arranged in the shell of the air conditioner. The air duct switching mechanism is controlled to change the direction of the airflow to achieve the effect of upper air intake and lower air outlet, or lower air intake and upper air outlet.

[0062] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0063] The position-limiting support device 100 provided in the present application can limit the motor axially and circumferentially. The shaking of the motor and the impeller 300 can be alleviated by supporting the circumferential surface 201 of the motor using the position-limiting end surface 311 of the protrusion 31, thereby preventing the motor and the impeller 300 from shaking synchronously relative to the position-limiting support device. The position-limiting support device 100 can reliably and effectively prevent or reduce the shaking of the motor, and accordingly can reliably and effectively prevent or reduce the shaking of the impeller 300. The impeller 300 of the fan provided in the present application has good dynamic balance, thereby ensuring the efficiency of the fan and the reliability of the entire machine.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0066] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A position limiting support device, characterized in that: include: A first support frame (10), the first support frame (10) being used for placing the driving unit (200); a fixed bracket (20), the fixed bracket (20) being connected to the first support bracket (10) and pressed onto an axial end surface of the driving portion (200), the fixed bracket (20) being used to axially limit the driving portion (200); a second support frame (30), the second support frame (30) being connected to the first support frame (10) and pressed onto the fixed support frame (20), the second support frame (30) being used to limit the circumferential position of the driving part (200); The fixing bracket (20) has a clearance space (210) arranged opposite to the circumferential surface (201) of the driving part (200); The second support frame (30) comprises a protruding portion (31), wherein the protruding portion (31) is located in the clearance space (210) and extends toward the circumferential surface (201) of the driving portion (200), and the protruding portion (31) has a limiting end surface (311), and the limiting end surface (311) is arranged opposite to the circumferential surface (201) of the driving portion (200) so as to limit the circumferential surface (201) of the driving portion (200).

2. The position limiting support device according to claim 1, characterized in that: There are a plurality of the clearance spaces (210), and the plurality of the clearance spaces (210) are arranged at intervals in the circumferential direction of the driving portion (200); There are a plurality of protruding portions (31), and the plurality of protruding portions (31) are arranged in a one-to-one correspondence with the plurality of clearance spaces (210).

3. The position limiting support device according to claim 1, characterized in that: The fixing bracket (20) comprises: Press plate (21); Support arms (22), wherein a plurality of the support arms (22) are arranged at intervals in the circumferential direction of the pressure plate (21), and the clearance space (210) is formed between two adjacent support arms (22).

4. The position limiting support device according to claim 3, characterized in that: The support arm (22) comprises a first support section (221) and a second support section (222) connected to each other, the first support section (221) being connected to the pressing plate (21) and extending along the axial direction of the driving portion (200), the second support section (222) extending along the radial direction of the driving portion (200), and the second support section (222) having a first connection hole (223); the first support frame (10) having a second connection hole (11) arranged opposite to the first connection hole (223); The position-limiting support device further comprises a first fastener, the first fastener being inserted through the first connection hole (223) and the second connection hole (11) to fixedly connect the fixing bracket (20) to the first support frame (10).

5. The position limiting support device according to claim 4, characterized in that: Along the axial direction of the driving portion (200), the second support frame (30) comprises a first support portion (32) and a second support portion (33) connected to each other, and a radial dimension of the first support portion (32) is smaller than a radial dimension of the second support portion (33); The first support portion (32) has a first accommodating space (321), the first support portion (32) is covered on the fixing bracket (20) via the first accommodating space (321), and a plurality of protruding portions (31) are arranged around the circumference of the first support portion (32) and protrude toward one side of the first accommodating space (321); The second support portion (33) has a second accommodating space (331), and the second support portion (33) is covered on the first support frame (10) via the second accommodating space (331).

6. The position limiting support device according to claim 5, characterized in that: An annular mounting plane (34) is formed at the connection between the first supporting portion (32) and the second supporting portion (33); a third connecting hole (341) is provided on the mounting plane (34); and a fourth connecting hole (12) is provided on the first supporting frame (10) and is arranged opposite to the third connecting hole (341); The position-limiting support device further comprises a second fastener, the second fastener being inserted through the third connection hole (341) and the fourth connection hole (12) to fixedly connect the second support frame (30) to the first support frame (10).

7. The position limiting support device according to claim 6, characterized in that: Along the axial direction of the first support frame (10), the first support frame (10) comprises a first end and a second end arranged opposite to each other, a first end surface of the first end is provided with a mounting groove (13), and the mounting groove (13) is used to place the driving part (200); The first end surface is provided with a second connection hole (11), and a plurality of the second connection holes (11) are arranged at intervals around the outer circumference of the mounting groove (13); The first end surface is also provided with the fourth connection hole (12), and a plurality of the fourth connection holes (12) are arranged at intervals around the outer circumference of the installation groove (13).

8. The position limiting support device according to claim 7, characterized in that: One second connection hole (11) is provided between two adjacent fourth connection holes (12).

9. The position limiting support device according to claim 7, characterized in that: The second end of the first support frame (10) has a flange (14), the flange (14) extends radially along the first support frame (10), and the flange (14) is provided with a first mounting hole (141) for connecting to a mounting base.

10. The position limiting support device according to claim 9, characterized in that: The second end of the first support frame (10) has a protruding structure (15) connected to the flange (14), and the protruding structure (15) extends toward the first end of the first support frame (10); One end of the second supporting portion (33) away from the first supporting portion (32) has a clearance notch (332) adapted to the protruding structure (15).

11. The position limiting support device according to any one of claims 5 to 10, characterized in that: The second support frame (30) further comprises: A connecting arm (35), wherein a plurality of the connecting arms (35) are arranged at intervals in the circumferential direction around the second supporting portion (33); and a second mounting hole (351) for connecting to a mounting base is provided on the connecting arm (35).

12. The position limiting support device according to any one of claims 1 to 10, characterized in that: The driving unit (200) is a motor; The fixing bracket (20) is provided with an avoidance hole (211) for the motor shaft (202) of the driving unit (200) to extend out; The second support frame (30) is provided with a clearance hole (322) for the motor shaft (202) of the driving part (200) to extend out.

13. A fan, characterized in that: include: A position limiting support device (100), wherein the position limiting support device is the position limiting support device according to any one of claims 1 to 12; A driving part (200), the driving part (200) being a motor, the driving part (200) being mounted on a first support frame (10) of the position-limiting support device (100); a fixed support frame (20) of the position-limiting support device (100) and a second support frame (30) of the position-limiting support device (100) are both connected to the first support frame (10) and limit the position of the driving part (200); An impeller (300), the impeller (300) comprising a hub (301), the hub (301) being connected to a motor shaft (202) of the motor.

14. The fan according to claim 13, characterized in that: The impeller (300) comprises a mixed flow blade (302) arranged on the hub (301); the outer diameter of the hub (301) gradually increases in a direction away from the position limiting support device, and the small diameter end of the hub (301) is connected to the motor shaft (202).

15. An air conditioner, characterized in that: Includes the fan described in claim 13 or 14.

16. The air conditioner according to claim 15, characterized in that: The air conditioner comprises: A housing, wherein the housing has an upper air outlet and a lower air outlet, and the fan is arranged in the housing; The heat exchanger is arranged in the air conditioner, and the fan introduces the airflow outside the shell into the shell through the upper air port, exchanges heat with the heat exchanger, and then discharges it outside the shell through the lower air port. Alternatively, the fan introduces the airflow outside the shell into the shell through the lower air port, exchanges heat with the heat exchanger, and then discharges it outside the shell through the upper air port.

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