Double-motor fan with double fan blades

Abstract

The double-motor fan with the double fan blades comprises a shell, a first fan body and a second fan body, the shell comprises a base and a mask which are detachably connected, the base comprises an air inlet end face, and the mask comprises an air outlet end face opposite to the air inlet end face. The first fan comprises a first stator fixedly connected to the inner side of the end face of the air inlet and a first rotor arranged on the first stator, the first rotor comprises first fan blades, the second fan comprises a second stator fixedly connected to the inner side of the end face of the air outlet and a second rotor arranged on the second stator, and the second rotor comprises second fan blades. The air outlet directions of the first fan blades and the second fan blades face the end face side of the air outlet, the effect of increasing the air speed of the fan is achieved, a low noise value can be kept, the air volume and static pressure performance of the fan can be improved, vibration can be distributed on the shell more evenly, violent local vibration of the fan is avoided, and the overall performance of the fan is improved. And greater performance requirements of users are met.

Description

Technical Field

[0001] The utility model relates to the field of fans, in particular to a double-blade double-motor fan. Background Art

[0002] Fans are electrical appliances that are often used in people's daily lives, mainly used to cool people or dissipate heat from objects. Existing fans basically use a single motor to drive a single fan blade to rotate, thereby generating wind. This type of fan can only increase the wind speed of the fan by increasing the power of the motor, which will cause serious noise and vibration, and cannot meet the user's usage needs. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a dual-blade dual-motor fan which can increase the wind speed while maintaining low noise and will not cause excessive fan vibration.

[0004] To solve the above technical problems, a dual-motor fan with two blades is provided in accordance with the utility model, comprising a shell, a first fan, and a second fan, the shell comprising a detachably connected base and a mask, the base comprising an air inlet end face, the mask comprising an air outlet end face opposite to the air inlet end face, the first fan comprising a first stator fixedly connected to the inner side of the air inlet end face, a first rotor arranged on the first stator, the first rotor comprising first blades, the second fan comprising a second stator fixedly connected to the inner side of the air outlet end face, a second rotor arranged on the second stator, the second rotor comprising second blades, and the air outlet directions of the first blades and the second blades are both toward the air outlet end face side.

[0005] Preferably, the base also includes an annular connecting portion arranged on the edge of the air inlet end face, the annular connecting portion and the air inlet end face are an integrated structure, the mask also includes a middle circle, the air outlet end face is assembled at one end of the inner circle of the middle circle, and the middle circle is snap-connected to the annular connecting portion.

[0006] Preferably, a positioning notch is provided at the top of the annular connecting part, a positioning block matching the positioning notch is provided at the bottom of the middle circle, the positioning block is provided on the positioning notch, a first annular limiting groove is provided at the top outer edge of the annular connecting part, a first annular limiting part matching the first annular limiting groove is provided at the bottom outer edge of the middle circle, the first annular limiting part is provided on the first annular limiting groove, a plurality of snapping grooves are evenly distributed at the top inner edge of the annular connecting part, snapping parts corresponding to the snapping grooves are distributed at the bottom inner edge of the middle circle, the snapping parts are snapped on the snapping grooves, a second annular limiting groove is provided at the top peripheral edge of the middle circle, a second annular limiting part matching the second annular limiting groove is provided at the bottom peripheral edge of the air outlet end face, the second annular limiting part is provided on the second annular limiting groove, and the air outlet end face is snapped on the inner ring of the middle circle.

[0007] Preferably, a first sleeve portion is provided on the inner side of the air inlet end face, and the inner ring of the first sleeve portion extends to the outer end face of the air inlet end face, the first stator includes a first iron core winding sleeved on the first sleeve portion, and a first circuit board fixedly connected to the first iron core winding, the first rotor also includes a first rotating shaft fixedly connected to the first fan blade, a first bearing is provided in the first sleeve portion, the first rotating shaft is connected to the inner ring of the first bearing, and a first wire loop is engaged with one end of the first rotating shaft; a second sleeve portion is provided on the inner side of the air outlet end face, and the inner ring of the second sleeve portion extends to the outer end face of the air outlet end face, the second stator includes a second iron core winding sleeved on the second sleeve portion, and a second circuit board fixedly connected to the second iron core winding, the second rotor also includes a second rotating shaft fixedly connected to the second fan blade, a second bearing is provided in the second sleeve portion, the second rotating shaft is connected to the inner ring of the second bearing, and a second wire loop is engaged with one end of the second rotating shaft.

[0008] Preferably, a receiving groove communicating with the inner circle of the second sleeve portion is provided at the top of the air outlet end surface, and a dust cover is embedded in the receiving groove.

[0009] Preferably, air inlets are distributed on the air inlet end surface and the annular connecting portion, and air outlets are distributed on the air outlet end surface.

[0010] The beneficial effects of the utility model are as follows: the utility model provides a dual-blade dual-motor fan, two fans are arranged in an outer shell, and the first fan and the second fan are arranged on the air inlet end face and the air outlet end face respectively. By allowing the first fan and the second fan to work at the same time, the fan wind speed is increased, and a low noise value can be maintained, the fan air volume and static pressure performance can be increased, the vibration can be more evenly distributed on the outer shell, and severe local vibration of the fan can be avoided, the overall performance of the fan is improved, and the user's greater performance requirements can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The schematic diagram of the appearance structure of the utility model is illustrated.

[0012] Figure 2 A cross-sectional view illustrating the present invention is shown.

[0013] Figure 3 The schematic diagram of the exploded structure of the utility model is illustrated.

[0014] Description of the accompanying drawings: first fan 1, first stator 10, first core winding 100, first circuit board 101, first rotor 11, first blade 110, first rotating shaft 111, second fan 2, second stator 20, second core winding 201, second circuit board 202, second rotor 21, second blade 210, second rotating shaft 211, base 3, air inlet end face 30, first sleeve portion 300, air inlet 301, annular connecting portion 31, positioning notch 310, first annular limiting groove 311, snap-fit ​​groove 312, first bearing 32, mask 4, air outlet end face 40, second annular limiting portion 400, second sleeve portion 401, accommodating groove 402, air outlet 403, middle ring 41, positioning block 410, first annular limiting portion 411, snap-fit ​​portion 412, second annular limiting groove 413, second bearing 42, dust cover 43. DETAILED DESCRIPTION

[0015] To make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments.

[0016] Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present disclosure.

[0017] refer to Figure 1-Figure 3 .

[0018] The utility model provides a dual-motor fan with two blades, comprising a shell, a first fan 1, and a second fan 2. The shell comprises a detachably connected base 3 and a mask 4, the base 3 comprises an air inlet end face 30, the mask 4 comprises an air outlet end face 40 opposite to the air inlet end face 30, the first fan 1 comprises a first stator 10 fixedly connected to the inner side of the air inlet end face 30, a first rotor 11 arranged on the first stator 10, the first rotor 11 comprises a first blade 110, the second fan 2 comprises a second stator 20 fixedly connected to the inner side of the air outlet end face 40, a second rotor 21 arranged on the second stator 20, the second rotor 21 comprises a second blade 210, and the air outlet directions of the first blade 110 and the second blade 210 are both toward the air outlet end face 40 side.

[0019] The specific usage principle is to set two fans in the outer shell, and set the first fan 1 and the second fan 2 on the air inlet end face 30 and the air outlet end face 40 respectively. By making the first fan 1 and the second fan 2 work at the same time, the fan wind speed can be increased, and a low noise value can be maintained. The air volume and static pressure performance of the fan can be improved, and the vibration can be more evenly distributed on the outer shell, avoiding severe local vibration of the fan, improving the overall performance of the fan, and meeting the user's greater performance requirements.

[0020] Based on the above embodiment, the base 3 also includes an annular connecting portion 31 arranged on the edge of the air inlet end face 30, the annular connecting portion 31 and the air inlet end face 30 are an integrated structure, the mask 4 also includes a middle circle 41, the air outlet end face 40 is assembled at one end of the inner circle of the middle circle 41, and the middle circle 41 is snap-fitted and connected to the annular connecting portion 31, so as to facilitate the replacement of the middle circle 41.

[0021] Based on the above embodiment, a positioning notch 310 is provided at the top of the annular connecting portion 31, a positioning block 410 matching the positioning notch 310 is provided at the bottom of the middle ring 41, and the positioning block 410 is arranged on the positioning notch 310. A first annular limiting groove 311 is provided at the top outer edge of the annular connecting portion 31, and a first annular limiting portion 411 matching the first annular limiting groove 311 is provided at the bottom outer edge of the middle ring 41. The first annular limiting portion 411 is arranged on the first annular limiting groove 311. A plurality of snap-fit ​​grooves 312 are evenly distributed on the inner edge of the middle ring 41, and snap-fit ​​parts 412 corresponding to the snap-fit ​​grooves 312 are distributed on the bottom inner edge of the middle ring 41, and the snap-fit ​​parts 412 are snapped on the snap-fit ​​grooves 312. A second annular limiting groove 413 is provided on the top circumference of the middle ring 41, and a second annular limiting part 400 matching the second annular limiting groove 413 is provided on the bottom circumference of the air outlet end face 40, and the second annular limiting part 400 is provided on the second annular limiting groove 413, and the air outlet end face 40 is snapped on the inner ring of the middle ring 41. During assembly, first, the air outlet end face 40 is assembled into the middle circle 41 so that the second annular limiting portion 400 is engaged with the second annular limiting groove 413, and then the positioning block 410 is aligned with the positioning notch 310 to engage each snapping portion 412 with the corresponding snapping groove 312, and the first annular limiting portion 411 is engaged with the first annular limiting groove 311, which can improve the assembly stability between the air outlet end face 40 and the middle circle 41, and between the middle circle 41 and the base 3.

[0022] Based on the above embodiment, a first sleeve portion 300 is provided on the inner side of the air inlet end surface 30, and the inner ring of the first sleeve portion 300 extends to the outer end surface of the air inlet end surface 30. The first stator 10 includes a first core winding 100 sleeved on the first sleeve portion 300, and a first circuit board 101 fixedly connected to the first core winding 100. The first rotor 11 also includes a first rotating shaft 111 fixedly connected to the first fan blade 110. A first bearing 32 is provided in the first sleeve portion 300, and the first rotating shaft 111 is connected to the inner ring of the first bearing 32. One end of the first rotating shaft 111 is engaged with the first A wire loop; a second sleeve portion 401 is provided on the inner side of the air outlet end face 40, and the inner circle of the second sleeve portion 401 extends to the outer end face of the air outlet end face 40, the second stator 20 includes a second core winding 201 sleeved on the second sleeve portion 401, and a second circuit board 202 fixedly connected to the second core winding 201, the second rotor 21 also includes a second rotating shaft 211 fixedly connected to the second fan blade 210, a second bearing 42 is provided in the second sleeve portion 401, the second rotating shaft 211 is connected to the inner circle of the second bearing 42, and a second wire loop is engaged with one end of the second rotating shaft 211. During assembly, first, assemble the first bearing 32 and the second bearing 42 into the first sleeve portion 300 and the second sleeve portion 401 respectively. After applying glue around the first sleeve portion 300 and the second sleeve portion 401, respectively put the first core winding 100 and the second core winding 201 on the first sleeve portion 300 and the second sleeve portion 401. Then, insert the first rotating shaft 111 and the second rotating shaft 211 into the first bearing 32 and the second bearing 42 respectively. Then, clamp the first wire loop and the second wire loop at one end of the first rotating shaft 111 and the second rotating shaft 211 respectively. Then, combine the base 3 and the mask 4.

[0023] Based on the above embodiment, the top of the air outlet end surface 40 is provided with a receiving groove 402 connected to the inner circle of the second sleeve part 401, and a dust cover 43 is embedded in the receiving groove 402. After the second rotating shaft 211 is inserted into the second bearing 42, the second wire loop is clamped on the second rotating shaft 211 through the second sleeve part 401 from the outside of the air outlet end surface 40, and then the dust cover 43 is covered on the receiving groove 402 to prevent dust from entering between the second bearing 42 and the second rotating shaft 211 from the outside, so as to ensure the smooth operation of the second rotor 21. In addition, the air inlet end surface 30 can be closed by sticking a label to the outer end of the first sleeve part 300.

[0024] Based on the above embodiment, air inlets 301 are distributed on the air inlet end surface 30 and the annular connecting portion 31, and air outlets 402 are distributed on the air outlet end surface 40. The external air forms an airflow driven by the first fan 1 and the second fan 2 and is output from the air outlet 402, which can increase the wind speed of the fan and keep the noise at a low value.

[0025] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A double-blade dual-motor fan, characterized in that: The invention comprises a shell, a first fan and a second fan, wherein the shell comprises a detachably connected base and a mask, the base comprises an air inlet end face, the mask comprises an air outlet end face opposite to the air inlet end face, the first fan comprises a first stator fixedly connected to the inner side of the air inlet end face, a first rotor arranged on the first stator, the first rotor comprises first blades, the second fan comprises a second stator fixedly connected to the inner side of the air outlet end face, a second rotor arranged on the second stator, the second rotor comprises second blades, and the air outlet directions of the first blades and the second blades are both toward the air outlet end face side.

2. A double-blade dual-motor fan according to claim 1, characterized in that: The base also includes an annular connecting portion arranged on the edge of the air inlet end face, the annular connecting portion and the air inlet end face are an integral structure, the mask also includes a middle circle, the air outlet end face is assembled on one end of the inner circle of the middle circle, and the middle circle is buckled and connected to the annular connecting portion.

3. A double-blade dual-motor fan according to claim 2, characterized in that: The top of the annular connecting part is provided with a positioning notch, the bottom of the middle ring is provided with a positioning block matching the positioning notch, the positioning block is arranged on the positioning notch, the top outer edge of the annular connecting part is provided with a first annular limiting groove, the bottom outer edge of the middle ring is provided with a first annular limiting part matching the first annular limiting groove, the first annular limiting part is arranged on the first annular limiting groove, the top inner edge of the annular connecting part is evenly distributed with a plurality of buckling grooves, the bottom inner edge of the middle ring is distributed with buckling parts corresponding to the buckling grooves, the buckling parts are buckled on the buckling grooves, the top peripheral edge of the middle ring is provided with a second annular limiting groove, the bottom peripheral edge of the air outlet end face is provided with a second annular limiting part matching the second annular limiting groove, the second annular limiting part is arranged on the second annular limiting groove, and the air outlet end face is snapped on the inner ring of the middle ring.

4. A double-blade double-motor fan according to claim 3, characterized in that: A first sleeve portion is provided on the inner side of the air inlet end surface, and the inner ring of the first sleeve portion extends to the outer end surface of the air inlet end surface, the first stator includes a first core winding sleeved on the first sleeve portion and a first circuit board fixedly connected to the first core winding, the first rotor also includes a first rotating shaft fixedly connected to the first fan blade, a first bearing is provided in the first sleeve portion, the first rotating shaft is connected to the inner ring of the first bearing, and a first wire loop is engaged with one end of the first rotating shaft; a second sleeve portion is provided on the inner side of the air outlet end surface, and the inner ring of the second sleeve portion extends to the outer end surface of the air outlet end surface, the second stator includes a second core winding sleeved on the second sleeve portion and a second circuit board fixedly connected to the second core winding, the second rotor also includes a second rotating shaft fixedly connected to the second fan blade, a second bearing is provided in the second sleeve portion, the second rotating shaft is connected to the inner ring of the second bearing, and a second wire loop is engaged with one end of the second rotating shaft.

5. A double-blade double-motor fan according to claim 4, characterized in that: A receiving groove communicating with the inner circle of the second sleeve portion is arranged at the top of the air outlet end surface, and a dust cover is embedded in the receiving groove.

6. A double-blade double-motor fan according to claim 5, characterized in that: The air inlet end surface and the annular connecting portion are both provided with air inlets, and the air outlet end surface is provided with air outlets.

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