Mixed-flow fan and electrical appliance

Abstract

The present disclosure relates to the technical field of fans, and particularly to a mixed-flow fan and an electrical appliance. The mixed-flow fan includes: a main body portion, including an impeller, a driving mechanism, and a supporting device, the driving mechanism is disposed on the supporting device and is drivingly connected to the impeller; and a swirl elimination portion, disposed downstream of the main body portion along the air flow direction, and including a swirl elimination hub, swirl elimination blades, and a swirl elimination shroud, the swirl elimination hub is disposed inside the swirl elimination shroud, and the swirl elimination blades are connected between the outer wall of the swirl elimination hub and the inner wall of the swirl elimination shroud; wherein, a groove is provided on the side wall of the swirl elimination hub connected to the swirl elimination blades, the grooves correspond to the swirl elimination blades one by one, an insertion block is provided on the supporting device, and the insertion block is inserted into the groove correspondingly one by one, and the opposite surfaces between the insertion block and the groove fit each other. Based on this, the performance of the mixed-flow fan can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fans, and particularly to a mixed-flow fan and an electrical appliance. Background Art

[0002] As products such as bladeless fans and vacuum cleaners are increasingly recognized and accepted by users, the mixed-flow fan, as a core component, is increasingly widely used in various fields of the household appliance industry. However, the performance of the mixed-flow fan still needs to be improved. Summary of the Invention

[0003] One technical problem to be solved by the present disclosure is to improve the performance of the mixed-flow fan.

[0004] To solve the above technical problem, the present disclosure provides a mixed-flow fan, which includes:

[0005] A main body part, including an impeller, a driving mechanism and a supporting device, the driving mechanism is arranged on the supporting device and is drivingly connected to the impeller; and

[0006] A swirl elimination part, arranged downstream of the main body part along the air flow direction, and including a swirl elimination hub, swirl elimination blades and a swirl elimination cover, the swirl elimination hub is arranged inside the swirl elimination cover, and the swirl elimination blades are connected between the outer wall of the swirl elimination hub and the inner wall of the swirl elimination cover;

[0007] Wherein, grooves are provided on the side wall of the swirl elimination hub connected to the swirl elimination blades, the grooves correspond to the swirl elimination blades one by one, insertion blocks are provided on the supporting device, and the insertion blocks are inserted into the grooves in a one-to-one correspondence, and the opposite surfaces between the insertion blocks and the grooves fit each other.

[0008] In some embodiments, along the circumferential direction of the swirl elimination hub, the grooves are located on one side of the swirl elimination blades, the side wall of the groove close to the swirl elimination blades is consistent with the shape of the radial inner end line of the swirl elimination blades, and the surface of the insertion block opposite to the side wall of the groove close to the swirl elimination blades is consistent with the shape of the side wall of the groove close to the swirl elimination blades.

[0009] In some embodiments, the insertion blocks are in fit with the inner walls of the grooves; alternatively, there is a gap between the insertion blocks and the inner walls of the grooves.

[0010] In some embodiments, there is a gap between the insertion blocks and the inner walls of the grooves, and the mixed-flow fan further includes an elastic member, the elastic member is arranged in the gap to seal the gap.

[0011] In some embodiments, a first strengthening part is provided on the supporting device, a second strengthening part is provided on the swirl elimination hub, and the first strengthening part and the second strengthening part enclose a sound absorption cavity, and the sound absorption cavity corresponds to the grooves one by one.

[0012] In some embodiments, the cross-section of the swirl wheel hub gradually decreases along the air flow direction; and / or, the swirl wheel hub, the swirl vanes and the swirl wheel cover are integrally formed.

[0013] In some embodiments, the support device includes a first support and a second support. The driving mechanism is located inside the first support and connected to the first support. The second support is detachably connected to one side of the first support close to the swirl part, and an insertion block is arranged on the second support.

[0014] In some embodiments, a first groove is provided on the first support, and a second groove is provided on the second support. The first groove and the second groove are butted to form a wire groove, and the wire of the driving mechanism extends out of the air duct of the mixed-flow fan through the wire groove.

[0015] In some embodiments, the first support is snap-connected or thread-connected to the second support; and / or, the second support is welded to the swirl wheel hub.

[0016] In some embodiments, the mixed-flow fan further includes a fixing seat. The fixing seat is arranged on the side of the support device far from the swirl part. A through hole is provided on the fixing seat, and the wire of the driving mechanism extends out of the mixed-flow fan through the through hole after extending out of the wire groove.

[0017] The present disclosure further provides an electrical appliance, which includes the mixed-flow fan according to the embodiments of the present disclosure.

[0018] In some embodiments, the electrical appliance is an air conditioner, a fan, a vacuum cleaner or a range hood.

[0019] By providing grooves corresponding to the swirl vanes one by one on the side wall of the swirl wheel hub, and providing insertion blocks on the support device for supporting the driving mechanism, which are inserted into and fit with the grooves, the operation noise of the mixed-flow fan can be reduced, and the performance of the mixed-flow fan can be improved.

[0020] Other features and advantages of the present disclosure will become clear by the following detailed description of the exemplary embodiments of the present disclosure with reference to the accompanying drawings. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is an exploded view of the mixed-flow fan in the embodiments of the present disclosure.

[0023] Figure 2 It is a longitudinal sectional view of the mixed-flow fan in the embodiments of the present disclosure.

[0024] Figure 3 This is the bottom-up perspective three-dimensional view of the mixed-flow fan after omitting the tail cone in the embodiment of the present disclosure.

[0025] Figure 4 This is the three-dimensional view of the main body part in the embodiment of the present disclosure.

[0026] Figure 5 This is the three-dimensional view of the first support in the embodiment of the present disclosure.

[0027] Figure 6 This is the three-dimensional view of the second support in the embodiment of the present disclosure.

[0028] Figure 7 This is the three-dimensional view of the racemization part in the embodiment of the present disclosure.

[0029] Figure 8 This is the exploded schematic view of the combined structure of the second support and the racemization part in the embodiment of the present disclosure.

[0030] Figure 9 This is the three-dimensional view of the combined structure of the second support and the racemization part in the embodiment of the present disclosure.

[0031] Explanation of reference numerals:

[0032] 10. Mixed-flow fan;

[0033] 1. Main body part; 11. Impeller; 111. Moving blade; 12. Driving mechanism; 121. Motor; 122. Wire; 13. Support device; 131. First support; 132. Second support; 133. Insert block; 134. Card slot; 135. Card table; 136. First strengthening part; 137. Wire groove; 138. First groove part; 139. Second groove part; 13a. Fitting groove;

[0034] 2. Racemization part; 21. Racemization blade; 22. Racemization hub; 23. Racemization wheel cover; 24. Groove; 25. Connection hole; 26. Second strengthening part; 27. Connection column; 28. Sound absorption cavity; 2a. Wall section;

[0035] 3. Fixed seat; 31. Through hole; 32. Convex column;

[0036] 4. Connection frame;

[0037] 5. Air collector;

[0038] 6. Air duct; 61. First flow channel; 62. Second flow channel; 63. Air inlet; 64. Air outlet;

[0039] 7. Tail cone. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present disclosure and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative work fall within the scope of protection of the present disclosure.

[0041] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0042] In the description of the present disclosure, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present disclosure and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present disclosure; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0043] In the description of the present disclosure, it should be understood that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning. Therefore, they should not be construed as limiting the scope of protection of the present disclosure.

[0044] In addition, the technical features involved in different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0045] A mixed-flow fan is a fan between an axial-flow fan and a centrifugal fan, which makes the air move both centrifugally and axially. Since the movement of the air in the mixed-flow fan mixes the two movement forms of axial flow and centrifugation, it is called "mixed flow".

[0046] The mixed-flow fan combines the characteristics of axial-flow fans and centrifugal fans. It has both a higher pressure coefficient than axial-flow fans and a larger flow coefficient than centrifugal fans, and at the same time has the characteristics of simple and convenient installation. Applying the mixed-flow fan to electrical appliances such as air conditioners, range hoods, vacuum cleaners, or fans (such as bladeless fans) can better meet the air volume and pressure head indicators and achieve a more ideal high air volume-to-noise ratio. Among them, the pressure head refers to the energy of a unit weight of fluid. The air volume-to-noise ratio refers to the ratio of the air volume to the noise.

[0047] Figures 1-9 The structure of the mixed-flow fan of the present disclosure is exemplarily shown.

[0048] Refer to Figures 1-2 , in some embodiments, the mixed-flow fan 10 includes a main body portion 1 and a swirl elimination portion 2. The main body portion 1 and the swirl elimination portion 2 are arranged in sequence along the air flow direction. It can be understood that the air flow direction refers to the direction in which the air flows from the air inlet 63 of the mixed-flow fan 10 to the air outlet 64 of the mixed-flow fan 10, which is consistent with the direction from the air inlet 63 to the air outlet 64. In the subsequent description, the upstream along the air flow direction can also be referred to as "up", and the downstream along the air flow direction can be referred to as "down".

[0049] The main body portion 1 is used to drive the air flow through the mixed-flow fan 10, and it includes an impeller 11, a driving mechanism 12, and a supporting device 13. The impeller 11 includes moving blades 111. The moving blades 111 are mixed-flow blades. The driving mechanism 12 is arranged on the supporting device 13 and is drivingly connected to the impeller 11. The driving mechanism 12 may include a motor 121. After the driving mechanism 12 is started, it can drive the impeller 11 to rotate, so as to suck in gas through the air inlet 63 into the mixed-flow fan 10, and make the gas perform a combined motion of axial flow and centrifugal flow under the action of the moving blades 111. The space where the moving blades 111 are located forms a first flow channel 61. The gas entering from the air inlet 63 flows through the first flow channel 61 and flows towards the swirl elimination portion 2.

[0050] The swirl elimination portion 2 is arranged downstream of the main body portion 1 along the air flow direction, and is used to guide the air outlet of the mixed-flow fan 10. By reducing or even eliminating the radial component velocity of the air flow flowing out from the main body portion 1, the lateral air outlet of the mixed-flow fan 10 is reduced, so that the air outlet of the mixed-flow fan 10 is more concentrated in the central area of the air outlet 64 of the mixed-flow fan 10. Refer to Figure 2 and Figure 7 , the swirl elimination portion 2 includes a swirl elimination hub 22, swirl elimination blades 21, and a swirl elimination shroud 23. The swirl elimination hub 22 is arranged inside the swirl elimination shroud 23. The cross-section of the swirl elimination hub 22 gradually decreases along the air flow direction, so that the swirl elimination hub 22 is generally V-shaped. The swirl elimination blades 21 are connected between the outer wall of the swirl elimination hub 22 and the inner wall of the swirl elimination shroud 23. A plurality of swirl elimination blades 21 can be arranged at intervals along the circumferential direction of the swirl elimination hub 22. Among them, the space where the swirl elimination blades 21 are located (that is, the space between the outer wall of the swirl elimination hub 22 and the inner wall of the swirl elimination shroud 23) forms a second flow channel 62. The outlet of the swirl elimination shroud 23 forms the air outlet 64. The gas flowing out from the first flow channel 61 flows through the second flow channel 62 and then flows out from the air outlet 64 to the outside of the mixed-flow fan 10. The first flow channel 61 and the second flow channel 62 are communicated with each other, and the two can be collectively referred to as the air duct 6 of the mixed-flow fan 10. That is to say, the air duct 6 includes the first flow channel 61 and the second flow channel 62.

[0051] In addition, refer to Figure 1And Figure 2 In some embodiments, the mixed-flow fan 10 further includes a gas collector 5, a connection frame 4, a fixed seat 3, and a tail cone 7. Among them, the gas collector 5, the connection frame 4, and the fixed seat 3 are arranged in sequence along the air flow direction, and are all located upstream of the main body portion 1 along the air flow direction, that is, on the side of the main body portion 1 away from the swirl elimination portion 2. The tail cone 7 is located downstream of the swirl elimination portion 2 along the air flow direction, that is, on the side of the swirl elimination portion 2 away from the main body portion 1. The inlet of the gas collector 5 forms the air inlet 63 of the mixed-flow fan 10.

[0052] During operation, the gas is driven by a driving mechanism 12 such as the motor 121, enters the first flow channel 61 through the air inlet 63, flows through the moving blade 111, and makes two kinds of axial flow and centrifugal movements under the action of the moving blade 111. Then, it flows into the second flow channel 62 and flows out from the central area of the air outlet 64 under the action of the swirl elimination blade 21.

[0053] In the related art, the side wall of the swirl elimination hub 22 connected to the swirl elimination blade 21 is a whole-round structure. It is found that because the side wall of the swirl elimination hub 22 connected to the swirl elimination blade 21 is a whole-round structure, the deformable amount during thermal expansion and contraction is small, and abnormal noise is easily generated during thermal expansion and contraction, resulting in a large operating noise of the mixed-flow fan 10.

[0054] Moreover, for the raceway wheel hub 22 with a full-circle structure (especially the V-shaped raceway wheel hub 22), interference is likely to occur at its upper end during the up-and-down mold opening and closing processes. Therefore, this structural form also increases the difficulty of integrally molding the raceway vanes 21, the raceway wheel hub 22, and the raceway wheel cover 23. As a result, in the related art, it is difficult to integrally mold the raceway vanes 21 with the raceway wheel hub 22. Instead, the raceway vanes 21 and the raceway wheel hub 22 are of an integral structure, but are of a split structure with the raceway wheel cover 23. Specifically, in the related art, after the raceway vanes 21 and the raceway wheel hub 22 are integrally molded, they are combined with the raceway wheel cover 23. Moreover, when the raceway vanes 21 and the raceway wheel hub 22 are integrally molded, a side mold opening method with relatively poor manufacturing precision stability is adopted compared with the up-and-down mold opening method. In this case, at the mating part between the raceway vanes 21 and the raceway wheel cover 23, a mating gap is likely to occur due to factors such as thermal expansion and contraction, machining precision, and part strength. Especially when the number of raceway vanes 21 is large and there are no strong connection features between the raceway vanes 21 and the raceway wheel cover 23 (for example, in some related technologies, the raceway vanes 21 and the raceway wheel cover 23 only contact each other without connection), a mating gap is more likely to occur. The mating gap between the raceway vanes 21 and the raceway wheel cover 23, on the one hand, is likely to cause the problem of flow through the gap. When the air flow passes through these small gaps, abnormal sounds (such as high-frequency sounds) will be generated, forming abnormal noise of flow through the gap and blowing, which reduces the user's comfort. On the other hand, the mating gap is located between the outer radial end of the raceway vanes 21 and the raceway wheel cover 23, and the radial dimension at the position where the mating gap is located is large. Since thermal expansion and contraction mainly occur in the radial direction, under the condition of the same material and the same temperature difference, the larger the radial dimension, the more obvious the thermal expansion and contraction. Therefore, when the mating gap is located between the outer radial end of the raceway vanes 21 and the raceway wheel hub 22, the raceway vanes 21 are more likely to undergo thermal expansion and contraction deformation when the air flow with different hot and cold temperatures passes through, resulting in the aerodynamic performance of the mixed-flow fan 10 deviating from the design point and causing abnormal sounds.

[0055] It can be seen that when the side wall of the raceway wheel hub 22 connected to the raceway vanes 21 adopts a full-circle structure, the processing difficulty of the raceway part 2 is relatively large, and the operating noise of the mixed-flow fan 10 is relatively high, which affects the performance of the mixed-flow fan 10.

[0056] In view of the above situation, in some embodiments of the present disclosure, the structures of the raceway wheel hub 22 and the support device 13 are improved. Specifically, referring to Figure 4 and Figures 7-9 , in some embodiments of the present disclosure, a groove 24 is provided on the side wall of the raceway wheel hub 22 connected to the raceway vanes 21, and the grooves 24 correspond to the raceway vanes 21 one by one. Moreover, an insertion block 133 is provided on the support device 13, and the insertion block 133 is inserted into the groove 24 corresponding to it, and the opposite surfaces between the insertion block 133 and the groove 24 fit each other.

[0057] Among them, "fitting" means having the same shape. The opposite surfaces between the insertion block 133 and the groove 24 fit each other, which means that the surface of the insertion block 133 facing the inner wall of the groove 24 has the same shape as the inner wall surface of the groove 24. For example, referring to Figures 8-9 , in some embodiments, along the circumferential direction of the de-swirl hub 22, the groove 24 is located on one side of the de-swirl blade 21. The side wall of the groove 24 close to the de-swirl blade 21 has the same shape as the edge line of the radially inner end of the de-swirl blade 21. The surface of the insertion block 133 opposite to the side wall of the groove 24 close to the de-swirl blade 21 has the same shape as the side wall of the groove 24 close to the de-swirl blade 21. At this time, the surface of the insertion block 133 opposite to the side wall of the groove 24 close to the de-swirl blade 21 has the same shape as the edge line of the radially inner end of the de-swirl blade 21, and the corresponding surface of the insertion block 133 becomes the blade conforming feature.

[0058] In the above setting, by setting the groove 24, the side wall of the de-swirl hub 22 connected to the de-swirl blade 21 is no longer a complete circular structure, but is divided into multiple segments. This is beneficial to improving the telescopic amount during thermal expansion and contraction, and thus is beneficial to reducing the risk of abnormal noise during thermal expansion and contraction. Furthermore, by further setting the insertion block 133 on the support device 13 that fits the shape of the groove 24 to fill the groove 24, it is beneficial to maintain the integrity and smoothness of the inner side wall of the second flow channel 62 after the de-swirl part 2 and the main body part 1 are combined, reduce, or even eliminate the air flow loss, and reduce the influence of the groove 24 on the aerodynamic performance.

[0059] It can be seen that based on the above setting, the operating noise of the mixed-flow fan 10 can be effectively reduced, and the performance of the mixed-flow fan 10 can be improved.

[0060] In addition, due to the set groove 24, a part of the de-swirl hub 22 at the groove 24 is removed, which can relieve the interference effect of the corresponding part of the de-swirl hub 22 during the up-and-down mold release process. Therefore, the above setting is also beneficial to reducing the difficulty of integrally forming the de-swirl blade 21, the de-swirl hub 22, and the de-swirl wheel cover 23, making it possible to integrally form the de-swirl blade 21 and the de-swirl wheel cover 23, and enabling the de-swirl blade 21, the de-swirl hub 22, and the de-swirl wheel cover 23 to be integrally formed by the up-and-down mold release method. The corresponding effect is more prominent when the de-swirl hub 22 is V-shaped.

[0061] For example, referring to Figure 7, in some embodiments, the racemization blade 21, the racemization hub 22, and the racemization wheel cover 23 are integrally formed. Moreover, the racemization blade 21, the racemization hub 22, and the racemization wheel cover 23 are integrally formed by an up-and-down die-casting method. At this time, since the racemization blade 21 and the racemization wheel cover 23 are integrally formed, compared with the method of separately processing and then combining the racemization blade 21 and the racemization wheel cover 23, the strength of the racemization part 2 is greater, the leaf shape positioning accuracy of the racemization blade 21 is higher, and there is no mating clearance between the racemization blade 21 and the racemization wheel cover 23. Therefore, the problem of abnormal noise caused by clearance flow between the racemization blade 21 and the racemization wheel cover 23 can be avoided. At the same time, compared with the side die-casting method, the products produced by the up-and-down die-casting method have better manufacturing stability. Therefore, the racemization blade 21, the racemization hub 22, and the racemization wheel cover 23 are integrally formed by the up-and-down die-casting method, which is also beneficial to improving the manufacturing stability of the racemization part 2 and increasing the strength of the racemization part 2.

[0062] During production and processing, the racemization blade 21, the racemization hub 22, and the racemization wheel cover 23 can be integrally formed first, and then the support device 13 is assembled with the racemization part 2 so that the insertion block 133 fills the groove 24. Since the support device 13 can be assembled with the racemization part 2 after the racemization part 2 is formed, it neither increases the forming difficulty of the racemization part 2 nor reduces the risk of abnormal noise caused by thermal expansion and contraction and clearance flow while ensuring the integrity and smoothness of the inner wall of the second flow channel 62.

[0063] In the foregoing embodiments, between the insertion block 133 and the inner wall of the groove 24, they can either fit each other or not fit, but have a gap.

[0064] Among them, when the insertion block 133 fits with the inner wall of the groove 24, the insertion block 133 completely fills the groove 24, and there is no mating clearance between the insertion block 133 and the groove 24. Therefore, it can prevent the air flow in the air duct 6 from leaking at the mating part of the insertion block 133 and the groove 24, reduce the air flow loss, and further prevent the problem of abnormal noise caused by clearance flow at the mating part of the insertion block 133 and the groove 24.

[0065] When there is a gap between the insertion block 133 and the inner wall of the groove 24, the assembly difficulty is relatively low, and this mating method is especially suitable for situations where thermal expansion and contraction are not severe. The gap between the insertion block 133 and the inner wall of the groove 24 should not be too large, and it is preferably 0.01 - 1 mm, so as to facilitate processing and assembly and reduce noise while minimizing the air flow loss as much as possible.

[0066] Although there is a gap between the insertion block 133 and the inner wall of the groove 24, and there is also a mating gap at the corresponding mating part, compared with the mating gap between the racemization blade 21 and the racemization wheel cover 23 in the related art, the radial dimension of the position where the mating gap between the insertion block 133 and the groove 24 is located is smaller. Moreover, the mating gap between the insertion block 133 and the groove 24 is mainly distributed along the height direction of the racemization blade 21, and compared with the radial dimension, the height dimension is smaller. Therefore, the amount of thermal expansion and contraction deformation is relatively small, and it will not excessively increase the new risk of thermal expansion and contraction deformation.

[0067] Moreover, when there is a gap between the insertion block 133 and the inner wall of the groove 24, some other measures can be taken to reduce the risks of thermal expansion and contraction and aerodynamic loss caused by the corresponding gap. For example, in some embodiments, the mixed-flow fan 10 may further include an elastic member disposed in the gap to seal the gap. Among them, the elastic member can be a sponge or a rubber pad, etc., and can be adhesively attached to the opposite surfaces of the insertion block 133 and the groove 24. The provided elastic member can, on the one hand, play a sealing role to prevent aerodynamic loss at the insertion block 133 and the groove 24, and on the other hand, it can also allow a certain degree of thermal expansion and contraction deformation to reduce the abnormal noise caused by thermal expansion and contraction.

[0068] In addition, in the foregoing embodiments, refer to Figure 4 and Figures 7-9 , a first strengthening portion 136 may be provided on the support device 13, and a second strengthening portion 26 may be provided on the racemization hub 22. The first strengthening portion 136 and the second strengthening portion 26 enclose to form a sound-absorbing cavity 28. The sound-absorbing cavity 28 corresponds to the groove 24 one by one. At this time, the sound-absorbing cavity 28 is located near the racemization blade 21 and can play a certain sound-absorbing role, thereby reducing abnormal noise. When there is a gap between the insertion block 133 and the inner wall of the groove 24 due to manufacturing or thermal expansion and contraction, etc., the high-speed airflow can enter the sound-absorbing cavity 28. Since the sound-absorbing cavity 28 can play a blocking role and form a large acoustic resistance, the noise intensity can be reduced to prevent the generation of large abnormal noise. Among them, the first strengthening portion 136 and the second strengthening portion 26 can be strengthening features such as reinforcing ribs. Therefore, the structural strength can also be improved, and the risk of thermal expansion and contraction deformation of the mutually cooperating support device 13 and the racemization portion 2 can be reduced.

[0069] As a structural form of the support device 13 in the foregoing embodiments, refer to Figure 4 , the support device 13 includes a first support 131 and a second support 132. The driving mechanism 12 is located inside the first support 131 and is connected to the first support 131. The second support 132 is detachably connected to the side of the first support 131 close to the racemization portion 2, and the insertion block 133 is disposed on the second support 132.

[0070] Among them, the first support 131 and the second support 132 can be snap-connected or thread-connected. For example, referring to Figure 5 and Figure 6 , in some embodiments, a slot 134 is provided on the first support 131. Correspondingly, a clamping platform 135 is provided on the second support 132. The clamping platform 135 is snapped into the slot 134 to realize the snap connection between the first support 131 and the second support 132. For another example, in other embodiments, the first support 131 and the second support 132 can be connected by fasteners such as screws.

[0071] The first support 131 and the racemization part 2 can be thread-connected. For example, referring to Figure 5 and Figure 7 , in some embodiments, connecting columns 27 are correspondingly provided on the racemization hub 22 and the first support 131. Holes are provided on the connecting columns 27. Fasteners such as screws pass through the connecting columns 27 on the racemization hub 22 and the first support 131 to realize the thread connection between the racemization hub 22 and the first support 131.

[0072] There may be no further connection relationship between the second support 132 and the racemization part 2, or the second support 132 can also be connected to the racemization part 2 by welding. For example, the second support 132 can be welded to the racemization hub 22. Specifically, in some embodiments, the second support 132 and the racemization hub 22 are welded by ultrasonic welding.

[0073] In the above setting method, the support device 13 adopts a split structure. Compared with the case of adopting an integral structure, it is more convenient for the installation of the driving mechanism 12 such as the motor 121 inside the support device 13, and it is also convenient for the wire 122 of the driving mechanism 12 (such as the power control wire of the motor 121 and other wires) to be led outwards.

[0074] The driving mechanism 12 hidden inside the mixed-flow fan 10 is generally connected to the outside through the wire 122. For example, it is electrically connected to the outside through the wire 122 to facilitate the control of the driving mechanism 12 by a controller or the like.

[0075] In the related art, the wire 122 generally passes through the air duct 6, which will affect the flow field of the entire fan and easily cause abnormal noise.

[0076] In view of the above situation, referring to Figures 2-6 , in some embodiments of the present disclosure, a first groove portion 138 is provided on the first support 131, and a second groove portion 139 is provided on the second support 132. The first groove portion 138 and the second groove portion 139 are butted to form a wire groove 137. The wire 122 of the driving mechanism 12 extends out of the air duct 6 of the mixed-flow fan 10 through the wire groove 137. And, referring to Figures 2-3, in some embodiments, a through hole 31 is provided on the fixed seat 3 disposed on the side of the support device 13 away from the anti-rotation part 2. After the wire 122 of the driving mechanism 12 extends out of the wire groove 137, it extends out of the mixed-flow fan 10 through the through hole 31. Specifically, as Figure 3 shown, the fixed seat 3 is provided with a convex column 32, and the through hole 31 is located inside the convex column 32.

[0077] Based on the above settings, the wire 122 can be directly led out of the air duct 6 through the wire groove 137 and does not need to pass through the air duct 6 subsequently. Therefore, the wire leading is relatively simple, and the influence of the wire 122 on the air duct flow field can be reduced, preventing abnormal noise caused by the wire 122 passing through the air duct 6.

[0078] Moreover, the first support 131 and the second support 132 are connected together by a buckle or a fastener to form a complete wire groove 137, which has a simple structure and can facilitate the pre-installation of the wire 122. The pre-assembly of the first support 131 and the second support 132 into a pre-installed structure is also beneficial to improving the assembly efficiency.

[0079] Next, the Figures 1-9 shown embodiment will be further introduced.

[0080] As Figures 1-9 shown, in this embodiment, the mixed-flow fan 10 includes a gas collector 5, a connection frame 4, a fixed seat 3, a main body part 1, an anti-rotation part 2, and a tail cone 7 arranged in sequence along the gas flow direction.

[0081] The main body part 1 includes an impeller 11, a motor 121, a first support 131, and a second support 132. The motor 121 is disposed inside the first support 131 and is drivingly connected to the impeller 11. The first support 131 is snap-connected to the second support 132. As Figures 2-4 shown, the first support 131 and the second support 132 are respectively provided with a first groove part 138 and a second groove part 139. The first groove part 138 and the second groove part 139 are butted to form a wire groove 137. The wire 122 of the motor 121 extends out of the air duct 6 through the wire groove 137. The wire groove 137 is located below the first flow channel 61 and extends radially outward along the impeller 11. At this time, the wire 122 is led out horizontally. The horizontally led wire 122 extends upward outside the air duct 6, reaches the through hole 31 on the fixed seat 3 sleeved outside the impeller 11, and passes through the through hole 31 and extends out of the mixed-flow fan 10. During this process, the wire 122 does not pass through the air duct 6. Therefore, the influence of the wire 122 on the air duct flow field is small, which is beneficial to reducing abnormal noise.

[0082] The anti-rotation part 2 includes anti-rotation blades 21, an anti-rotation hub 22, and an anti-rotation cover 23. The anti-rotation blades 21, the anti-rotation hub 22, and the anti-rotation cover 23 are integrally formed. A plurality of anti-rotation blades 21 are uniformly distributed along the circumferential direction of the anti-rotation hub 22.

[0083] Among them, the racemization part 2 is connected to the fixed seat 3 through the racemization wheel cover 23. Specifically, as Figure 7 shown, a connection hole 25 is provided on the racemization wheel cover 23, and the racemization wheel cover 23 is connected to the fixed seat 3 through the connection hole 25. Fasteners such as screws pass through the connection hole 25 and the holes on the fixed seat 3 to realize the connection between the racemization wheel cover 23 and the fixed seat 3.

[0084] The racemization part 2 is connected to the first support 131 through the racemization hub 22. Specifically, as Figure 7 shown, a connection column 27 is provided on the racemization hub 22, and the racemization hub 22 is connected to the first support 131 through the connection column 27. Fasteners such as screws pass through the connection column 27 to realize the connection between the racemization hub 22 and the first support 131.

[0085] The racemization part 2 cooperates with the second support 132 through the racemization hub 22. The second support 132 cooperates with the racemization hub 22 through the conformal feature. Specifically, as Figure 7 shown, a plurality of grooves 24 are provided on the side wall of the racemization hub 22 connected to the racemization blade 21, so that the side wall of the racemization hub 22 connected to the racemization blade 21 is divided into a plurality of wall segments 2a. Each wall segment 2a is provided with a racemization blade 21, and a groove 24 is provided between two adjacent wall segments 2a. At this time, each groove 24 corresponds to each racemization blade 21 one by one, and each groove 24 is located near the corresponding racemization blade 21. The side wall of the groove 24 close to the racemization blade 21 has the same shape as the radial inner end line of the racemization blade 21. Correspondingly, as Figure 4 shown, a plurality of inserts 133 are provided on the second support 132. Each insert 133 corresponds to each groove 24 one by one. At this time, all the inserts 133 are evenly distributed along the circumferential direction of the second support 132. The interval between two adjacent inserts 133 forms a mating groove 13a. As Figures 8-9 shown, when the second support 132 and the racemization hub 22 are assembled, each insert 133 is inserted into the corresponding groove 24, and each wall segment 2a is inserted into the corresponding mating groove 13a. Each insert 133 coincides with the side line of its corresponding groove 24. At this time, the surface of the insert 133 close to the racemization blade 21 has the same shape as the radial inner end of the racemization blade 21, and the insert 133 has a blade conformal feature. At the same time, each wall segment 2a coincides with the side line of its corresponding mating groove 13a. In this way, as Figure 9 shown, after the second support 132 and the racemization hub 22 are assembled together, the second support 132 and the racemization hub 22 together form a complete circle.

[0086] And, as Figures 8-9As shown, in this embodiment, a second reinforcing portion 26 is provided on the raceway hub 22. The second reinforcing portion 26 is connected to the radially inner surface of the wall section 2a such that the second reinforcing portion 26 corresponds to the raceway vanes 21 one by one. A first reinforcing portion 136 is provided on the support device 13. The first reinforcing portion 136 corresponds to the second reinforcing portion 26 one by one and, together with the second reinforcing portion 26, encloses a silencing cavity 28.

[0087] Based on the cooperation between the raceway hub 22 and the second support 132, it is possible to maintain the integrity and smoothness of the inner wall of the second flow channel 62 where the raceway vanes 21 are located, reduce abnormal noises during thermal expansion and contraction, lower the operating noise of the fan, and also reduce the processing difficulty. It solves the problem in the related art that it is difficult to process and manufacture after the raceway vanes 21 and the raceway cover 23 are combined together, enabling the raceway vanes 21, the raceway hub 22, and the raceway cover 23 to be integrated into one body. This is beneficial to increasing the strength of the raceway portion 2, improving the overall operating stability of the machine, and enhancing the overall assembly efficiency of the fan. At the same time, it is also beneficial to improving the positioning accuracy of the raceway vanes 21, eliminating the fitting gap between the raceway vanes 21 and the raceway cover 23, and reducing abnormal noises caused by thermal expansion and contraction and abnormal noises caused by excessive flow through the gap.

[0088] During assembly, the motor 121 can be fixed to the first support 131, and then the first support 131 and the second support 132 can be snap-connected together so that the wire 122 is pressed by the first support 131 and the second support 132 and extends out from the wire groove 137, so that the wire 122 extends out to the outside through the through hole 31 on the fixing seat 3. After that, the raceway portion 2 is assembled, the raceway hub 22 and the second support 132 are fitted through the conformal feature, and are connected to the first support 131 through fasteners. At the same time, the raceway cover 23 and the fixing seat 3 are connected through fasteners. Then the connection frame 4 is connected to the fixing seat 3, and the wire routing channel is pressed and fixed. After that, the air collector 5 is installed on the connection frame 4.

[0089] In summary, the mixed-flow fan 10 of this embodiment can solve the wire routing problem, reduce the processing difficulty of the raceway portion 2, improve the strength, assembly accuracy, and assembly efficiency of the fan components, improve the overall operating stability of the fan, and reduce abnormal noises caused by thermal expansion and contraction and excessive flow through the gap. Therefore, the performance of the mixed-flow fan 10 of this embodiment is improved.

[0090] The above are only exemplary embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A mixed-flow fan (10), characterized in that, Comprising: A main body portion (1), including an impeller (11), a driving mechanism (12), and a supporting device (13), wherein the driving mechanism (12) is disposed on the supporting device (13) and is drivingly connected to the impeller (11); And A swirl eliminating portion (2), disposed downstream of the main body portion (1) along the air flow direction, and including a swirl eliminating hub (22), swirl eliminating blades (21), and a swirl eliminating cover (23), wherein the swirl eliminating hub (22) is disposed inside the swirl eliminating cover (23), and the swirl eliminating blades (21) are connected between the outer wall of the swirl eliminating hub (22) and the inner wall of the swirl eliminating cover (23); Wherein, a groove (24) is provided on the side wall of the swirl eliminating hub (22) connected to the swirl eliminating blades (21), the grooves (24) correspond to the swirl eliminating blades (21) one by one, an insertion block (133) is provided on the supporting device (13), and the insertion block (133) is inserted into the groove (24) corresponding to it one by one, and the opposite surfaces between the insertion block (133) and the groove (24) fit each other.

2. The mixed-flow fan (10) according to claim 1, characterized in that, Along the circumferential direction of the swirl eliminating hub (22), the groove (24) is located on one side of the swirl eliminating blade (21), the side wall of the groove (24) close to the swirl eliminating blade (21) has the same shape as the edge line of the radially inner end of the swirl eliminating blade (21), and the surface of the insertion block (133) opposite to the side wall of the groove (24) close to the swirl eliminating blade (21) has the same shape as the side wall of the groove (24) close to the swirl eliminating blade (21).

3. The mixed-flow fan (10) according to claim 1, characterized in that, The insertion block (133) fits with the inner wall of the groove (24); or, there is a gap between the insertion block (133) and the inner wall of the groove (24).

4. The mixed-flow fan (10) according to claim 3, characterized in that, There is a gap between the insertion block (133) and the inner wall of the groove (24), and the mixed flow fan (10) further includes an elastic member, and the elastic member is disposed in the gap to seal the gap.

5. The mixed-flow fan (10) according to claim 1, characterized in that, A first strengthening portion (136) is provided on the supporting device (13), a second strengthening portion (26) is provided on the swirl eliminating hub (22), and the first strengthening portion (136) and the second strengthening portion (26) enclose to form a sound absorption cavity (28), and the sound absorption cavity (28) corresponds to the groove (24) one by one.

6. The mixed-flow fan (10) according to claim 1, characterized in that, The cross-section of the swirl eliminating hub (22) gradually decreases along the air flow direction; and / or, the swirl eliminating hub (22), the swirl eliminating blades (21), and the swirl eliminating cover (23) are integrally formed.

7. The mixed-flow fan (10) according to any one of claims 1-6, characterized in that, The supporting device (13) includes a first support (131) and a second support (132), the driving mechanism (12) is located inside the first support (131) and is connected to the first support (131), the second support (132) is detachably connected to one side of the first support (131) close to the swirl eliminating portion (2), and the insertion block (133) is provided on the second support (132).

8. The mixed-flow fan (10) according to claim 7, wherein, A first groove portion (138) is provided on the first support (131), and a second groove portion (139) is provided on the second support (132). The first groove portion (138) and the second groove portion (139) are butted to form a wire groove (137). A wire (122) of the driving mechanism (12) extends out of the air duct (6) of the mixed-flow fan (10) through the wire groove (137).

9. The mixed-flow fan (10) according to claim 7, characterized in that, The first support (131) is snap-connected or thread-connected to the second support (132); and / or, the second support (132) is welded to the anti-rotation hub (22).

10. The mixed-flow fan (10) according to claim 8, characterized in that, The mixed-flow fan (10) further includes a fixed seat (3). The fixed seat (3) is disposed on a side of the support device (13) away from the anti-rotation portion (2). A through hole (31) is provided on the fixed seat (3). The wire (122) of the driving mechanism (12) extends out of the mixed-flow fan (10) through the through hole (31) after extending out of the wire groove (137).

11. An electrical appliance, characterized in that, Comprising the mixed-flow fan (10) according to any one of claims 1-10.

12. The electrical appliance according to claim 11, characterized in that, The electrical appliance is an air conditioner, a fan, a vacuum cleaner or a range hood.

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