Wind wheel and fan

Abstract

The utility model discloses a wind wheel and a fan, and the wind wheel comprises a hub, a connecting ring, a plurality of axial flow blades and a plurality of centrifugal blades, the multiple axial flow blades are connected to the peripheral wall of the hub at intervals in the circumferential direction of the hub. The multiple centrifugal blades are arranged around the periphery of the hub at intervals, and the multiple centrifugal blades and the peripheral wall of the hub are arranged at intervals. The connecting ring is annularly arranged on the peripheries of the multiple axial flow blades and connected with the outer ends, away from the hub, of the multiple centrifugal blades. The outer end of each axial flow blade is fixedly connected with the inner ends of the multiple centrifugal blades so that airflow can be guided to the multiple centrifugal blades in the radial direction of the hub. According to the wind wheel, axial and radial two-way air outlet is achieved, meanwhile, the overall air outlet effect can be improved, and therefore the overall performance and efficiency of a draught fan can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially a kind of wind wheel and fan. BACKGROUND

[0002] Centrifugal fan generates centrifugal force by rotation to push air flow, thereby realizing radial air outlet. Axial fan gas flows parallel to fan shaft, i.e. axial air outlet is realized. With the continuous development of technology, people's requirements for fan performance are also increasing, and single air outlet direction has been difficult to meet the use requirements of more complex occasions. For example, in some specific industrial environments, both axial air outlet is needed to achieve local cooling or ventilation, and radial air outlet is needed to meet the air flow demand of a large range. Therefore, the related technology begins to try to set an axial fan inside a centrifugal fan wheel, in the hope of realizing the dual functions of axial air outlet and radial air outlet.

[0003] However, the current axial blades and centrifugal blades are separated from each other, so that the air flow generated by the axial blades and the centrifugal blades respectively is difficult to be consistent in direction and intensity, resulting in poor overall air outlet effect and affecting the overall performance and efficiency of the fan. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of wind wheel, to solve the technical problem that the wind wheel with axial flow blade and centrifugal blade simultaneously has poor air outlet effect.

[0005] To achieve the above-mentioned purpose, the wind wheel provided by the utility model comprises a hub, a connecting ring, a plurality of axial flow blades and a plurality of centrifugal blades. Wherein,

[0006] The plurality of axial flow blades are connected to the outer peripheral wall of the hub in a circumferential direction.

[0007] The plurality of centrifugal blades are arranged around the outer periphery of the hub and spaced apart from the outer peripheral wall of the hub. The connecting ring is annularly arranged outside the plurality of axial flow blades and connects the outer ends of the plurality of centrifugal blades away from the hub.

[0008] The outer end of each axial flow blade is fixedly connected to the inner end of the plurality of centrifugal blades, so as to guide the air flow to the plurality of centrifugal blades in a radial direction of the hub.

[0009] Optionally, the outer end of each axial flow blade and the inner end of the plurality of centrifugal blades are mutually inserted.

[0010] Optionally, each of the centrifugal blades is composed of an air inlet section and an air outlet section, the air outlet section is connected to the air inlet section on the side away from the hub, the walls on the same side of the hub in the axial direction are connected to the connecting ring, the outer end of each of the axial flow blades is inserted into the air inlet sections, and is arranged adjacent to or connected to the inner circumferential wall of the connecting ring.

[0011] Optionally, in the radial direction of the hub, the length of the air outlet section is greater than the length of the air inlet section.

[0012] Optionally, the connecting ring is connected to the distal ends of the air outlet sections in the air outlet direction of the axial flow blades.

[0013] Optionally, in the radial direction of the hub, the lengths of the air outlet sections inserted into the axial flow blades are equal.

[0014] Optionally, the ratio of the distance between the outer circumferential wall of the hub and the inner circumferential wall of the centrifugal blades to the length of the centrifugal blades in the radial direction of the hub is greater than or equal to 0.8 and less than or equal to 1.2.

[0015] Optionally, in the axial direction of the hub, the width of the centrifugal blades is greater than or equal to the width of the axial flow blades, and in the radial direction of the hub, the axial flow blades are arranged opposite to the centrifugal blades.

[0016] Optionally, the hub, the connecting ring, the axial flow blades and the centrifugal blades are integrally formed.

[0017] The utility model discloses still propose a kind of fan including volute, motor and the wind wheel as any one described above, the wind wheel is installed in the volute, the corresponding air inlet of multiple the axial flow blades and axial air outlet are respectively set in the opposite two side walls of the volute, the circumferential wall of the volute is equipped with centrifugal air outlet;The motor is used to drive the wind wheel rotation, for guiding airflow to flow into the volute by air inlet, and blow out via the axial air outlet and the centrifugal air outlet.

[0018] The present invention provides a wind rotor with multiple centrifugal blades and multiple axial blades, thereby achieving both radial and axial airflow, thereby meeting the requirements of applications requiring both axial and radial airflow. A connecting ring is provided around the outer periphery of the multiple axial blades and connects the outer ends of the multiple centrifugal blades away from the hub. While connecting the multiple centrifugal blades, the connecting ring does not block the airflow from the axial blades. Furthermore, the outer end of each axial blade is fixedly connected to the inner end of the multiple centrifugal blades. Thus, there is no gap between the outer end of the axial blade and the inner circumferential wall of the centrifugal blade. When the wind rotor rotates, the multiple axial blades drive airflow into the wind rotor axially. Guided by the multiple axial blades, a portion of the airflow flows axially outward between adjacent axial blades, while another portion flows radially into the multiple centrifugal blades from the windward surfaces of the axial blades. This eliminates wind loss caused by the gap between the outer circumferential wall of the axial blades and the inner circumferential wall of the centrifugal blades, effectively increasing the radial airflow entering the multiple centrifugal blades of the wind rotor, thereby improving the airflow efficiency of the entire wind rotor and enhancing the overall performance and efficiency of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of an embodiment of a wind wheel of the present utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the stroke wheel from another angle;

[0022] Figure 3 for Figure 2 Left side view of the stroke wheel;

[0023] Figure 4 for Figure 1 Front view of the stroke wheel;

[0024] Figure 5 for Figure 2 Front view of the stroke wheel;

[0025] Figure 6 This is a structural diagram of an embodiment of a fan of the utility model;

[0026] Figure 7 for Figure 6 Schematic diagram of the structure of the centrifugal fan from another angle.

[0027] Description of Figure Numbers:

[0028] Reference Name Reference Name Reference Name 100 Impeller 110 Hub 120 Connecting ring 130 Axial blade 140 Centrifugal blade 141 Inlet section 142 Outlet section 200 Volute 210 Inlet 220 Axial outlet 230 Centrifugal outlet

[0029] The purposes, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0032] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes the A solution, or the B solution, or the A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is also not within the protection scope required by the utility model.

[0033] The utility model provides a kind of wind wheel, it is applied to fan.

[0034] In the embodiments of the utility model, Figure 1 And Figure 2As shown, the wind wheel 100 comprises a hub 110, a connecting ring 120, a plurality of axial flow blades 130 and a plurality of centrifugal flow blades 140; wherein the plurality of axial flow blades 130 are connected to the outer peripheral wall of the hub 110 in a circumferential direction; the plurality of centrifugal flow blades 140 are arranged around the outer periphery of the hub 110 and spaced apart from the outer peripheral wall of the hub 110; the connecting ring 120 is annularly arranged outside the plurality of axial flow blades 130 and connects the outer ends of the plurality of centrifugal flow blades 140 away from the hub 110; the outer end of each axial flow blade 130 is fixedly connected to the inner end of the plurality of centrifugal flow blades 140, so as to guide the airflow along the radial direction of the hub 110 to the plurality of centrifugal flow blades 140.

[0035] In the present embodiment, the plurality of axial flow blades 130 are connected to the outer peripheral wall of the hub 110, so that the plurality of axial flow blades 130 and the hub 110 integrally form a structure similar to the axial flow wind wheel 100. The specific structure of the axial flow blades 130 and the hub 110 and the number of the axial flow blades 130 can refer to the existing design, which is not specifically limited herein. The plurality of centrifugal flow blades 140 are arranged around the outer periphery of the hub 110 and connected by the connecting ring 120, so that the plurality of centrifugal flow blades 140 and the connecting ring 120 integrally form a structure similar to the centrifugal flow wind wheel 100. The number and specific structure of the plurality of centrifugal flow blades 140 also refer to the existing design, which is not specifically limited herein, as long as the inner peripheral wall of the plurality of centrifugal flow blades 140 is spaced apart from the outer peripheral wall of the hub 110 to leave a passage for the plurality of axial flow blades 130 to blow out. The hub 110 can be used to install a motor, so that the hub 110 can be driven to rotate by the motor, thereby driving the entire wind wheel 100 to rotate.

[0036] In order to improve the connection strength and reduce the connection difficulty, the hub 110, the connecting ring 120, the plurality of axial flow blades 130 and the plurality of centrifugal blades 140 are integrally formed. Of course, in some embodiments, the plurality of axial flow blades 130 and the plurality of centrifugal blades 140 can be separately formed and then connected. The connecting ring 120 is arranged around the outer periphery of the plurality of axial flow blades 130, so that the connecting ring 120 does not block the air outlet of the axial flow blades 130. The outer ends of the plurality of centrifugal blades 140 are connected by the connecting ring 120, and the inner ends of part of the centrifugal blades 140 are connected with the axial flow blades 130. Therefore, it is not necessary to additionally arrange an inner ring to connect the inner ends of the plurality of centrifugal blades 140, which can reduce the wind resistance while simplifying the components. The connecting ring 120 connects the outer ends of the plurality of centrifugal blades 140 away from the hub 110, so that the connecting ring 120 can be connected to the outer peripheral wall of the plurality of centrifugal blades 140 or the side wall of the plurality of centrifugal blades 140 in the axial direction of the hub 110. The spacing between the inner peripheral wall of the plurality of centrifugal blades 140 and the outer peripheral wall of the hub 110 depends on the length of the axial flow blades 130 in the radial direction of the hub 110 and the connection points of the axial flow blades 130 and the centrifugal blades 140, and the spacing is not limited herein. It should be noted that the spacing between the inner peripheral wall of the plurality of centrifugal blades 140 and the outer peripheral wall of the hub 110 should be sufficient to meet the axial air inlet and outlet requirements of the plurality of axial flow blades 130.

[0037] The wind wheel 100 can realize radial and axial bidirectional air outlet by arranging the plurality of centrifugal blades 140 and the plurality of axial flow blades 130, so as to meet the use requirements of occasions that require both axial air outlet and radial air outlet. The connecting ring 120 is arranged around the outer periphery of the plurality of axial flow blades 130, and connects the outer ends of the plurality of centrifugal blades 140 away from the hub 110. The connecting ring 120 does not block the air outlet of the axial flow blades 130 when connecting the plurality of centrifugal blades 140. Meanwhile, the outer end of each axial flow blade 130 is fixedly connected with the inner end of the plurality of centrifugal blades 140, so that there is no gap between the outer end of the axial flow blade 130 and the inner peripheral wall of the centrifugal blade 140. Therefore, when the wind wheel 100 rotates, the plurality of axial flow blades 130 drive the airflow to enter the wind wheel 100 from the axial direction, and part of the airflow flows out from the axial direction between the adjacent two axial flow blades 130, and the other part of the airflow flows into the plurality of centrifugal blades 140 from the windward surface of the axial flow blade 130 in the radial direction. In this way, the wind loss caused by the spacing between the outer peripheral wall of the axial flow blade 130 and the inner peripheral wall of the centrifugal blade 140 is eliminated, the radial air inlet amount of the plurality of centrifugal blades 140 of the wind wheel 100 can be effectively increased, and the air outlet effect of the entire wind wheel 100 is improved, so as to improve the overall performance and efficiency of the fan.

[0038] In an embodiment, please refer to Figures 1 to 5The outer end of each axial flow blade 130 is inserted into the inner end of the plurality of centrifugal flow blades 140. In this way, the connecting area of the axial flow blade 130 and the plurality of centrifugal flow blades 140 can be increased, and the connecting strength of the axial flow blade 130 and the plurality of centrifugal flow blades 140 can be improved. At the same time, since the outer end of the axial flow blade 130 is inserted into the plurality of centrifugal flow blades 140, the radial guiding effect of the axial flow blade 130 on the plurality of centrifugal flow blades 140 can be further improved.

[0039] Further, as shown in Figures 1 to 5 each centrifugal flow blade 140 is composed of an air inlet section 141 and an air outlet section 142, the air outlet section 142 is connected to the side of the air inlet section 141 away from the hub 110; the wall surface on the same side of the hub 110 in the axial direction of the plurality of air outlet sections 142 is connected to the connecting ring 120, the outer end of each axial flow blade 130 is inserted into the plurality of air inlet sections 141, and is arranged adjacent to or connected to the inner circumferential wall of the connecting ring 120.

[0040] In this embodiment, it can be understood that when the wind wheel 100 rotates, the airflow flows into the air inlet section 141 of the centrifugal flow blade 140 from the radial direction of the hub 110, and flows out through the air outlet section 142. By connecting the wall surface on the same side of the hub 110 in the axial direction of the plurality of air outlet sections 142 to the connecting ring 120, and inserting the outer end of each axial flow blade 130 into the plurality of air inlet sections 141 and arranging it adjacent to or connected to the inner circumferential wall of the connecting ring 120, the projection of the connecting ring 120 and the axial flow blade 130 in the axial direction of the hub 110 can cover the plurality of centrifugal flow blades 140 connected by the axial flow blade 130. Therefore, the connecting ring 120 and the axial flow blade 130 can block the entire side wall (axial leeward surface) of the plurality of centrifugal flow blades 140 in the air outlet direction of the axial flow blade 130. In this way, the airflow entering from the axial direction will not flow out axially from the gap between the plurality of centrifugal flow blades 140 connected by the axial flow blade 130, which can greatly reduce the airflow escaping at the centrifugal flow blade 140, so that the airflow entering the wind wheel 100 only flows out axially from the gap between the plurality of axial flow blades 130, and flows radially into the plurality of centrifugal flow blades 140, which can make the axial and radial air outlets more concentrated, thereby greatly improving the axial and radial air outlet effects of the entire wind wheel 100. In addition, the windward surface of the axial flow blade 130 can uniformly and losslessly guide the airflow into the plurality of centrifugal flow blades 140 connected thereto, which can reduce wind loss and improve wind volume.

[0041] Further, please refer to Figure 5In the radial direction of the hub 110, the length of the outflow section 142 is greater than the length of the inflow section 141. If the length of the inflow section 141 is too long, the spacing between the inner circumferential wall of the centrifugal blades 140 and the outer circumferential wall of the hub 110 is small, which narrows the outflow channel of the axial blades 130 of the wind wheel 100, thereby reducing the axial outflow. Therefore, the length of the outflow section 142 is greater than the length of the inflow section 141, so that the spacing between the inner circumferential wall of the centrifugal blades 140 and the outer circumferential wall of the hub 110 is appropriate, which can ensure the axial outflow and outflow effect of the plurality of axial blades 130 of the wind wheel 100.

[0042] Further, as shown in Figures 1 to 3 、 Figure 7 , the connecting ring 120 is connected to the distal ends of the plurality of outflow sections 142 in the outflow direction of the axial blades 130. In this way, the connecting ring 120 can avoid blocking the axial inflow and affecting the inflow, and the connecting ring 120 can also shield the distal ends of the plurality of centrifugal blades 140 in the axial direction of the hub 110 to prevent airflow from flowing axially through the gaps between the plurality of centrifugal blades 140, thereby allowing most of the airflow to flow radially into the plurality of centrifugal blades 140.

[0043] In an embodiment, referring to Figures 1 to 5 , in the radial direction of the hub 110, the plurality of outflow sections 142 inserted into the axial blades 130 have equal lengths. In this way, the connection strength of the plurality of centrifugal blades 140 and the axial blades 130 is consistent, avoiding partial damage and fracture. Moreover, the flow guiding of the axial blades 130 and the outflow of the plurality of centrifugal blades 140 are more uniform and smooth.

[0044] In an embodiment, as shown in Figure 4 and Figure 5 , the ratio of the spacing between the outer circumferential wall of the hub 110 and the inner circumferential wall of the plurality of centrifugal blades 140 to the length of the centrifugal blades 140 in the radial direction of the hub 110 is greater than or equal to 0.8 and less than or equal to 1.2. Specifically, the ratio of the spacing between the outer circumferential wall of the hub 110 and the inner circumferential wall of the plurality of centrifugal blades 140 to the length of the centrifugal blades 140 in the radial direction of the hub 110 is 0.8, 0.9, 1.0, 1.05, 1.1, 1.2, etc.

[0045] The ratio of the spacing between the outer circumferential wall of the hub 110 and the inner circumferential wall of the plurality of centrifugal blades 140 to the length of the centrifugal blades 140 in the radial direction of the hub 110 is greater than or equal to 0.8 and less than or equal to 1.2, so that the widths of the corresponding wind channels of the centrifugal blades 140 and the corresponding wind channels of the axial blades 130 are approximately equal, which makes the difference between the axial outflow and the radial outflow of the entire wind wheel 100 not too large, thereby improving the overall outflow effect of the wind wheel 100.

[0046] In an embodiment, please refer to Figures 1 to 3 In the axial direction of the hub 110, the width of the centrifugal blades 140 is greater than or equal to the width of the axial-flow blades 130, and in the radial direction of the hub 110, the axial-flow blades 130 are arranged opposite the plurality of centrifugal blades 140. In this way, the axial-flow blades 130 can be prevented from protruding out of the centrifugal blades 140 in the axial direction of the hub 110, thereby avoiding accidental damage, and the overall consistency of the entire wind wheel 100 can be ensured.

[0047] The utility model also provides a fan, such as Figure 6 And Figure 7 As shown in the figure, the fan comprises a volute 200, a motor and a wind wheel 100, the specific structure of the wind wheel 100 is referred to the above-mentioned embodiments, the wind wheel 100 is installed in the volute 200, the opposite two side walls of the volute 200 are respectively provided with an air inlet 210 corresponding to a plurality of axial-flow blades 130 and an axial-flow air outlet 220, and the peripheral side wall of the volute 200 is provided with a centrifugal air outlet 230; the motor is used to drive the wind wheel 100 to rotate, so as to guide the airflow to flow into the volute 200 from the air inlet 210 and blow out through the axial-flow air outlet 220 and the centrifugal air outlet 230; since the above-mentioned all technical solutions of all embodiments are adopted in the fan, at least all beneficial effects brought by the technical solutions of the above-mentioned embodiments are possessed, which will not be repeated here. The structure and shape of the volute 200 can refer to the volute 200 of the centrifugal fan, which is not specifically limited here.

[0048] The above-mentioned is only optional embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made under the inventive concept of the utility model, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A wind wheel, characterized in that The hub, the connecting ring, the plurality of axial flow blades and the plurality of centrifugal flow blades are integrally formed. The plurality of axial flow blades are spaced apart along the circumferential direction of the hub and connected to the outer circumferential wall of the hub. The plurality of centrifugal flow blades are spaced apart around the outer circumference of the hub and spaced apart from the outer circumferential wall of the hub. The outer end of each of the axial flow blades is fixedly connected to the inner end of the plurality of centrifugal flow blades, so as to guide the airflow along the radial direction of the hub to the plurality of centrifugal flow blades.

2. The wind wheel of claim 1, wherein The outer end of each of the axial flow blades is inserted into the inner end of the plurality of centrifugal flow blades.

3. The wind wheel of claim 2, wherein, Each of the centrifugal flow blades is composed of an air inlet section and an air outlet section, the air outlet section being connected to the side of the air inlet section away from the hub.

4. The wind wheel of claim 3, wherein The length of the air outlet section in the radial direction of the hub is greater than the length of the air inlet section.

5. The wind wheel of claim 3, wherein The connecting ring is connected to the distal end of the plurality of air outlet sections in the air outlet direction of the axial flow blades.

6. A wind wheel according to any one of claims 3 to 5, wherein The length of the plurality of air outlet sections inserted into the axial flow blades in the radial direction of the hub is equal.

7. The wind wheel of any one of claims 1 to 5, wherein, The ratio of the spacing between the outer circumferential wall of the hub and the inner circumferential wall of the plurality of centrifugal flow blades to the length of the centrifugal flow blades in the radial direction of the hub is greater than or equal to 0.8 and less than or equal to 1.

2.

8. The wind wheel of any one of claims 1 to 5, wherein, The width of the centrifugal flow blades in the axial direction of the hub is greater than or equal to the width of the axial flow blades, and the axial flow blades are arranged opposite to the plurality of centrifugal flow blades in the radial direction of the hub.

9. The wind wheel of any one of claims 1 to 5, wherein, The hub, the connecting ring, the plurality of axial flow blades and the plurality of centrifugal flow blades are integrally formed.

10. A fan, characterized by The hub, the connecting ring, the plurality of axial flow blades and the plurality of centrifugal flow blades are integrally formed. The hub, the connecting ring, the plurality of axial flow blades and the plurality of centrifugal flow blades are integrally formed.

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