Turbofan with large air volume and turbofan device
By setting a return air inlet in the volute of the turbo fan, and using the airflow speed difference to draw in low-speed airflow, the problem of complex structure and high cost of existing turbo fans when large air volume is required is solved, and the effect of increasing the output air volume under the same power is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-03-27
AI Technical Summary
Existing turbofans typically use high-power motors to drive the turbofans at high speeds when there is a large air volume requirement, which increases the difficulty of structural design and production costs.
The return air inlet is designed to draw in low-speed airflow from the airflow velocity difference, thereby increasing the airflow volume. By setting the return air inlet in the volute, the airflow velocity difference is used to draw in low-speed airflow from the return air inlet and merge it into the straight section of the air supply channel, thereby increasing the airflow volume and reducing the dependence on the impeller speed.
Without increasing the impeller speed, the air volume is increased, the production cost is reduced, the structural design is simplified, and the demand for large air volume is met.
Smart Images
Figure CN224049381U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a turbofan device, especially a turbofan device with large air volume. BACKGROUND
[0002] The turbofan can be used as a separate household appliance, or can be built into other appliances to accelerate gas flow, facilitate rapid ventilation or heat dissipation. The turbofan in the prior art is provided with an air inlet in the middle of the volute, and an air outlet is provided on the outer side of the volute. When the fan blades in the volute rotate, the airflow speed entering from the air inlet can be accelerated, and the airflow can rotate along the inner wall of the volute, and finally be discharged from the air outlet of the volute. When facing the demand for large air volume, a high-power motor is usually used to drive the turbofan to rotate at high speed, thereby increasing the air volume of the turbofan. This will increase the difficulty of structural design and production cost of the turbofan.
[0003] Therefore, it is necessary to further improve the structure of the turbofan. SUMMARY
[0004] To solve the above at least one technical problem, the main purpose of the utility model is to provide a turbofan with large air volume.
[0005] To achieve the above purpose, one technical scheme adopted by the utility model is to provide a turbofan with large air volume, comprising:
[0006] a wind wheel;
[0007] a bottom shell having a mounting portion inside, the wind wheel being rotatably assembled in the mounting portion; the bottom shell has a first opening at an air outlet position;
[0008] a cover shell covering the bottom shell, and the cover shell and the bottom shell form a volute with a containing space, the wind wheel being located in the containing space, and a air supply channel being formed between the wind wheel and the volute; at least one air inlet is provided in the middle of the cover shell, the cover shell has a second opening corresponding to the first opening, and the second opening can be connected to the first opening to form an air outlet of the air supply channel;
[0009] The air supply channel comprises an arc-shaped channel section and a straight section, the arc-shaped channel section and the straight section being in communication, and the outer wall of the volute is provided with an air return opening corresponding to the connection position of the arc-shaped channel section and the straight section, the air return opening being used to suck low-speed airflow from the air return opening by using the speed difference of the airflow, and the low-speed airflow being collected into the straight section of the air supply channel.
[0010] The outer wall of the bottom shell has a first notch corresponding to the position of the arc-shaped channel section and the straight section, the cover shell has a second notch, and the first notch can be connected to the second notch to form the air return opening.
[0011] The cover shell has a first surrounding wall and a second surrounding wall, the first surrounding wall and the second surrounding wall are arranged apart, and the second gap is formed between the first surrounding wall and the second surrounding wall; the end of the second surrounding wall close to the first surrounding wall has a first arc-shaped surrounding wall segment, and the first arc-shaped surrounding wall segment extends into the air supply channel;
[0012] The bottom shell has a third surrounding wall and a fourth surrounding wall, the third surrounding wall and the fourth surrounding wall are arranged apart, and the first gap is formed between the third surrounding wall and the fourth surrounding wall; the end of the fourth surrounding wall close to the third surrounding wall has a second arc-shaped surrounding wall segment, and the second arc-shaped surrounding wall segment extends into the air supply channel, and the second arc-shaped surrounding wall segment can be butted with the first arc-shaped surrounding wall segment.
[0013] The outer surface of the first surrounding wall close to the second surrounding wall is arranged in an arc surface, and the outer surface of the third surrounding wall close to the fourth surrounding wall is arranged in an arc surface.
[0014] The outer wall of the volute is provided with a grille arranged at the air return opening.
[0015] The mounting portion is a mounting column protruding from the bottom shell, the mounting column has a mounting hole, and the wind wheel is rotatably mounted in the mounting hole.
[0016] The cover shell and the bottom shell are detachably connected through the clamping mechanism.
[0017] The clamping mechanism includes a buckle and a socket, the buckle is arranged at the edge of the outer wall of the bottom shell close to the cover shell, the socket is arranged at a position corresponding to the buckle, and the buckle can be clamped and matched with the socket.
[0018] The outer wall of the cover shell has a butt joint outer edge, the inner wall of the bottom shell has a butt joint inner edge, and the butt joint inner edge can be butt jointed with the butt joint outer edge.
[0019] To achieve the above purpose, another technical scheme adopted by the utility model provides a turbofan device with large air volume.
[0020] The technical scheme of the utility model mainly includes a wind wheel, a cover shell and a bottom shell, wherein the cover shell and the bottom shell can form a volute when being covered, a blowing passage is formed between the wind wheel and the volute, the blowing passage includes an arc-shaped passage section and a straight passage section, the arc-shaped passage section is close to the wind wheel, the straight passage section is close to an air outlet, the volute is provided with a return air outlet at the connecting position of the arc-shaped passage section and the straight passage section, a speed difference is formed at the position of the return air outlet when the airflow in the volute is rotated at high speed and passes through the blowing passage, the airflow flowing at high speed in the blowing passage can suck the low-speed airflow of the return air outlet, namely, the low-speed airflow is sucked by using the speed difference and is converged into the straight passage section of the blowing passage, and finally is discharged from the air outlet. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.
[0022] Figure 1 It is an overall structure schematic view of the turbine fan with large air volume of one embodiment of the utility model.
[0023] Figure 2 It is an exploded structure schematic view of the turbine fan with large air volume of one embodiment of the utility model.
[0024] Figure 3 It is another exploded structure schematic view of the turbine fan with large air volume of one embodiment of the utility model.
[0025] Figure 4 It is still another exploded structure schematic view of the turbine fan with large air volume of one embodiment of the utility model.
[0026] Label explanation:
[0027] 101, air inlet, 102, return air outlet, 1021, first gap, 1022, second gap, 103, air outlet, 1031, first opening, 1032, second opening;
[0028] 110, cover shell: 111, first surrounding wall, 112, second surrounding wall, 1121, first arc-shaped surrounding wall section, 113, abutting outer edge;
[0029] 120, wind wheel;
[0030] 130, bottom shell: 131, third surrounding wall, 1311, arc surface, 132, fourth surrounding wall, 1321, second arc-shaped surrounding wall segment, 133, butt joint inner edge, 134, mounting column, 135, mounting hole;
[0031] 140, clamping mechanism: 141, bayonet, 1411, gear belt, 1412, notch, 142, buckle, 1421, notch, 1422, clamping block, 1412, clamping hook.
[0032] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to 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 belong to the protection scope of the utility model.
[0034] It should be noted that the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, 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 not within the protection scope required by the utility model.
[0035] Different from the turbine fan in the related art, when the demand for increasing the air supply amount is required, a high-power motor is usually adopted to drive the turbine fan to rotate at high speed, so as to increase the air supply amount of the turbine fan, which will increase the difficulty of structural design of the turbine fan and the production cost. The utility model provides a turbine fan with large air volume, which can increase the demand for air supply amount under the driving of the same power by designing a return air inlet and using the speed difference of airflow to suck low-speed airflow from the return air inlet, which is beneficial to saving cost. The specific structure of the turbine fan with large air volume is described in the following embodiments.
[0036] Please refer to Figures 1 to 4 , Figure 1 It is an overall structural schematic diagram of the turbine fan with large air volume according to an embodiment of the utility model. Figure 2 It is an exploded structural schematic diagram of the turbine fan with large air volume according to an embodiment of the utility model. Figure 3Another exploded structure schematic view of the turbine fan with large air volume of one embodiment of the utility model has; Figure 4 Another exploded structure schematic view of the turbine fan with large air volume of one embodiment of the utility model has;In the utility model embodiment, the turbine fan with large air volume can be used as a separate turbine fan, and can be used as a turbofan device to send air, dissipate heat or transport liquid for other components.The turbine fan with large air volume specifically comprises:
[0037] The wind wheel 120 has a mounting space, and a motor can be assembled in the mounting space, so that the motor provides a suitable rotating speed for the wind wheel 120.The power of the motor can be adjusted through a gear switch, so as to increase or reduce the rotating speed of the wind wheel 120, so that the air volume per unit time can better meet the needs of the user.
[0038] The bottom shell 130 has a mounting portion in the bottom shell 130, and the wind wheel 120 is rotatably assembled in the mounting portion;the bottom shell 130 has a first opening 1031 located at an air outlet position.The bottom shell 130 has a mounting space, and the mounting portion is located in the mounting space;after the wind wheel 120 is mounted on the mounting portion, the outer edge of the wind wheel 120 is separated from the inner wall of the bottom shell 130, so as to avoid interference between the inner wall of the bottom shell 130 and the wind wheel 120.In addition, in order to ensure the mechanical strength of the bottom shell 130, a plurality of reinforcing ribs are arranged on the bottom shell 130.The reinforcing ribs are arranged on the inner wall and the outer wall of the bottom shell 130.
[0039] The cover shell 110 is covered on the bottom shell 130, and the cover shell 110 and the bottom shell 130 form a volute with a containing space, and the wind wheel 120 is located in the containing space, and a air supply channel is formed between the wind wheel 120 and the volute;at least one air inlet 101 is formed in the middle of the cover shell 110, and the cover shell 110 has a second opening 1032 corresponding to the first opening 1031, and the second opening 1032 can be connected with the first opening 1031 to form an air outlet 103 of the air supply channel.The cover shell 110 can be covered on the bottom shell 130, and at this time, the two form a volute.In order to prevent air overflow at the covering position, a sealing gasket can be arranged at the connecting position of the cover shell 110 and the bottom shell 130.Air supply channel is formed between the volute and the wind wheel 120, and the air supply channel is used for conveying the high-speed airflow generated by the rotation of the wind wheel 120 to the air outlet 103 and discharging the high-speed airflow.The air inlet 101 in the sidewall of the cover shell 110 is provided with a grille in order to prevent larger foreign matters from entering.The air inlet 101 can be divided into a plurality of air inlets through the grille.
[0040] The air supply duct comprises an arc-shaped channel section and a straight section, the arc-shaped channel section is communicated with the straight section, and the outer wall of the volute is provided with a return air outlet 102 corresponding to the connection position of the arc-shaped channel section and the straight section. The return air outlet 102 is used for sucking low-speed air flow from the return air outlet 102 by using the speed difference of the air flow and converging into the straight section of the air supply channel. The outer wall of the volute is provided with the return air outlet 102. When the fan wheel 120 rotates, the speed difference of the air flow is generated at the inner and outer positions of the return air outlet 102. The air flow in the return air outlet 102 is high-speed air flow, and the air flow outside the return air outlet 102 is low-speed air flow. When the high-speed air flow passes through the air supply duct, part of the low-speed air flow is taken away, thereby forming a negative pressure at the return air outlet 102, so that the external air flow flows into the negative pressure area. With the continuous flow of the high-speed air flow, the low-speed air flow continuously flows into the air supply channel, and the low-speed air flow and the high-speed air flow converge in the straight section of the air supply channel and are discharged from the air outlet 103. In this way, the air outlet amount of the air supply channel per unit time is increased, and the design requirement of large air volume is met.
[0041] During assembly, the motor is first installed in the fan wheel 120, then the fan wheel 120 is fixed to the mounting portion of the bottom shell 130, the fan blades of the fan wheel 120 are separated from the inner wall of the bottom shell 130, and finally the cover shell 110 is covered on the bottom shell 130. The cover shell 110 and the bottom shell 130 can be fixed by clamping or screwing.
[0042] As a specific embodiment of the present scheme, the outer wall of the bottom shell 130 has a first notch 1021 corresponding to the position of the arc-shaped channel section and the straight section, the cover shell 110 has a second notch 1022, and the first notch 1021 can be butted with the second notch 1022 to form the return air outlet 102. When the cover shell 110 is covered on the bottom shell 130, the first notch 1021 is butted with the second notch 1022, and at this time, the first notch 1021 and the second notch 1022 form the return air outlet 102. In actual application, the opening areas of the first notch 1021 and the second notch 1022 can be flexibly adjusted according to actual needs. Considering the structural stability of the bottom shell 130, the area of the surrounding wall of the bottom shell 130 is large, at this time, the opening area of the first notch 1021 can be increased, and the area of the second notch 1022 can be correspondingly reduced.
[0043] As a specific embodiment of the present scheme, the cover shell 110 has a first surrounding wall 111 and a second surrounding wall 112, the first surrounding wall 111 and the second surrounding wall 112 are arranged separately, and the second notch 1022 is formed between the first surrounding wall 111 and the second surrounding wall 112. The end of the second surrounding wall 112 close to the first surrounding wall 111 has a first arc-shaped surrounding wall section 1121, and the first arc-shaped surrounding wall section 1121 extends into the air supply channel.
[0044] The bottom shell 130 has a third surrounding wall 131 and a fourth surrounding wall 132, the third surrounding wall 131 and the fourth surrounding wall 132 are arranged apart, the first gap 1021 is formed between the third surrounding wall 131 and the fourth surrounding wall 132; the end of the fourth surrounding wall 132 close to the third surrounding wall 131 has a second arc-shaped surrounding wall segment 1321, the second arc-shaped surrounding wall segment 1321 extends into the air supply channel, and the second arc-shaped surrounding wall segment 1321 can be butt-jointed with the first arc-shaped surrounding wall segment 1121. When the cover shell 110 is covered on the bottom shell 130, the first surrounding wall 111 is butt-jointed with the third surrounding wall 131, the second surrounding wall 112 is butt-jointed with the fourth surrounding wall 132, and the first arc-shaped surrounding wall segment 1121 is butt-jointed with the second arc-shaped surrounding wall segment 1321, so as to form an integrated volute. After the first arc-shaped surrounding wall segment 1121 is butt-jointed with the second arc-shaped surrounding wall segment 1321, the entire return air port 102 is arc-shaped, and when the low-speed airflow flows into the return air port 102, the low-speed airflow can contact the arc-shaped surface of the return air port 102, so as to reduce the air resistance and increase the airflow entering speed.
[0045] In order to make the cover shell 110 and the bottom shell 130 fit more closely, the outer surface of the first surrounding wall 111 close to the second surrounding wall 112 is arc-shaped, and the outer surface of the third surrounding wall 131 close to the fourth surrounding wall 132 is arc-shaped 1311. When the first surrounding wall 111 is butt-jointed with the third surrounding wall 131, the butt-jointed gap is reduced through arc-shaped contact, and the surface of the entire volute is smoother.
[0046] Considering the arrangement of the return air port 102, when the return air port 102 is arranged upward, in order to reduce the foreign matters entering the air supply channel through the return air port 102, the volute outer wall is provided with a grid arranged at the return air port 102, so as to avoid that the foreign matters block the return air port 102. When the return air port 102 is arranged downward, the grid can be removed.
[0047] As a specific embodiment of the present scheme, the mounting portion is a mounting column 134 protruding from the bottom shell 130, the mounting column 134 has a mounting hole 135, and the wind wheel 120 is rotatably mounted in the mounting hole 135. The mounting column 134 is used for providing support for the wind wheel 120 and ensuring reliable rotation of the wind wheel 120. In order to further improve the mechanical strength of the mounting column 134, a plurality of reinforcing ribs can be connected between the outer wall of the mounting column 134 and the inner wall of the bottom shell 130, and the plurality of reinforcing ribs are uniformly arranged. The wind wheel 120 has a mounting column, and the mounting column can be fixed in the mounting hole 135 through a pin shaft.
[0048] As a specific embodiment of the scheme, the cover shell 110 and the bottom shell 130 are detachably connected through the clamping mechanism 140. In order to facilitate the maintenance of the turbofan, the cover shell 110 and the bottom shell 130 are connected through the clamping structure, so that the cover shell 110 and the bottom shell 130 can be quickly assembled and disassembled. The number of the clamping mechanism 140 is multiple, and the multiple clamping mechanisms 140 ensure the stability of the fixation of the cover shell 110 and the bottom shell 130. In the scheme, the number of the clamping mechanism 140 is three, two clamping mechanisms 140 are close to the air outlet 103, and the remaining one clamping mechanism 140 is located in the middle of the outer wall of the volute. It should be pointed out that the number of the clamping mechanism 140 can be flexibly set according to the size of the volute, and is not limited here.
[0049] Specifically, the clamping mechanism 140 includes a buckle 142 and a socket 141, the buckle 142 is arranged on the outer wall edge of the bottom shell 130 close to the cover shell 110, the socket 141 is arranged corresponding to the position of the buckle 142, and the buckle 142 can be clamped and matched with the socket 141. When the cover shell 110 is covered on the bottom shell 130, the buckle 142 extends into the socket 141, so as to realize clamping and matching. More specifically, the buckle 142 includes a clamping block 1422 arranged on a notch 1421 of the bottom shell 130, and the outer wall of the clamping block 1422 has a clamping hook 1423; the socket 141 includes a gap 1412 arranged on the cover shell 110 and a blocking belt 1411 arranged on the gap 1412, and the socket 141 is formed between the gap 1412 and the blocking belt 1411. When the buckle 142 is clamped with the socket 141, the clamping block 1422 is inserted into the gap 1412, and the clamping hook 1423 can partially extend out of the socket 141, so as to improve the stability of clamping and matching.
[0050] In addition, the outer wall of the cover shell 110 has a butt joint outer edge 113, the inner wall of the bottom shell has a butt joint inner edge 133, and the butt joint inner edge 133 can be butt jointed with the butt joint outer edge 113. When the cover shell 110 is covered on the bottom shell 130, the platform surfaces of the butt joint outer edge 113 and the butt joint inner edge 133 are coincident, which is beneficial to improve the air tightness of the connection of the volute after clamping.
[0051] In the embodiment of the utility model, the turbofan device, including above-mentioned have big wind volume's turbofan. The specific structure of the turbofan with large air volume is please refer to the above-mentioned embodiment, this place does not repeat here. Since the turbofan device of the scheme adopts all the technical schemes of the above-mentioned turbofan with large air volume, it at least has all the advantages and beneficial effects brought by the technical schemes of the above-mentioned turbofan with large air volume, which will not be repeated here.
[0052] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application, as described in the present application specification and the accompanying drawings, is included in the patent protection scope of the present application.
Claims
1. A turbofan having a large airflow, characterized by, The turbo fan with large air volume comprises: a wind wheel; a bottom shell with a mounting portion in the bottom shell, the wind wheel being rotatably assembled in the mounting portion, the bottom shell having a first opening at an air outlet position; a cover shell covering the bottom shell, the cover shell and the bottom shell forming a volute with a containing space, the wind wheel being located in the containing space, and an air supply passage being formed between the wind wheel and the volute, the cover shell having at least one air inlet in the middle of the cover shell, the cover shell having a second opening corresponding to the first opening, the second opening being capable of being connected to the first opening to form an air outlet of the air supply passage; wherein the air supply passage comprises an arc-shaped passage section and a straight passage section, the arc-shaped passage section being connected to the straight passage section, and the outer wall of the volute having a return air outlet corresponding to the connection position of the arc-shaped passage section and the straight passage section, the return air outlet being used to suck low-speed air flow from the return air outlet by using the speed difference of the air flow and to flow into the straight passage section of the air supply passage.
2. The turbofan with large airflow of claim 1, wherein, The outer wall of the bottom shell has a first notch corresponding to the position of the arc-shaped passage section and the straight passage section, the cover shell has a second notch, and the first notch is capable of being connected to the second notch to form the return air outlet.
3. The turbofan with large airflow of claim 2, wherein, The cover shell has a first surrounding wall and a second surrounding wall, the first surrounding wall and the second surrounding wall being spaced apart, the second notch being formed between the first surrounding wall and the second surrounding wall, and the end of the second surrounding wall close to the first surrounding wall having a first arc-shaped surrounding wall section, the first arc-shaped surrounding wall section extending into the air supply passage. The bottom shell has a third surrounding wall and a fourth surrounding wall, the third surrounding wall and the fourth surrounding wall being spaced apart, the first notch being formed between the third surrounding wall and the fourth surrounding wall, and the end of the fourth surrounding wall close to the third surrounding wall having a second arc-shaped surrounding wall section, the second arc-shaped surrounding wall section extending into the air supply passage, and the second arc-shaped surrounding wall section being capable of being connected to the first arc-shaped surrounding wall section.
4. The turbofan with large airflow of claim 3, wherein, The outer surface of the first surrounding wall close to the second surrounding wall is arc-shaped, and the outer surface of the third surrounding wall close to the fourth surrounding wall is arc-shaped.
5. The turbofan with large airflow of claim 1, wherein, The outer wall of the volute is provided with a grille covering the return air outlet.
6. The turbofan with large airflow of claim 1, wherein, The mounting portion is a mounting column protruding from the bottom shell, the mounting column having a mounting hole, and the wind wheel being rotatably mounted in the mounting hole.
7. The turbofan with large airflow of claim 1, wherein, The cover shell and the bottom shell are detachably connected through a clamping mechanism.
8. The turbofan with large airflow of claim 7, wherein, The clamping mechanism comprises a clasp and a clamping hole, the clasp being arranged on the outer wall edge of the bottom shell close to the cover shell, the clamping hole being arranged corresponding to the position of the clasp, and the clasp being capable of being clamped and matched with the clamping hole.
9. The turbofan with large airflow of claim 1, wherein, The outer wall of the cover shell has a connecting outer edge, and the inner wall of the bottom shell has a connecting inner edge, the connecting inner edge being capable of being connected to the connecting outer edge.
10. A turbofan device, characterized in that, The turbo fan device comprises the turbo fan with large air volume according to any one of claims 1 to 9.