Counter-rotating booster fan and vehicle

Abstract

The utility model discloses a counter-rotating booster fan and a vehicle. The counter-rotating booster fan comprises a first front fan, a first driving motor, a second front fan, a second driving motor, a first rear fan, a third driving motor, a second rear fan, a fourth driving motor and a fan barrel shell. The second front fan is located on the circumferential outer side of the first front fan. The air inlet side of the first rear fan is opposite to the air outlet side of the first front fan; the air inlet side of the second rear fan is opposite to the air outlet side of the second front fan; the fan barrel shell comprises a mounting cavity, a first opening and a second opening, and the first front fan, the second front fan, the first rear fan and the second rear fan are all located in the mounting cavity; the air inlet sides of the first front fan and the second front fan face the first opening, and the air outlet sides of the first rear fan and the second rear fan face the second opening. According to the counter-rotating booster fan disclosed by the invention, zone control in the action range of the counter-rotating booster fan can be realized, so that different air volume requirements of passengers at different positions in the range of the counter-rotating booster fan can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engineering, and in particular to a counter-rotating supercharger fan and a vehicle. Background Art

[0002] In the related technologies, automotive boost fans usually adopt centrifugal structures, which are large in size, seriously occupy the space inside the car, and are not flexible in layout, which has a certain impact on both the choice of automobile manufacturers and the use of consumers. In terms of boosting capacity, centrifugal boost fans have a simple structure and strong boosting capacity. Under the premise of not considering the space occupied, they are the first choice for pipeline boosting.

[0003] However, the existing vehicle booster fan can only deliver air at a single air volume within its range of action, and cannot meet the personalized needs of passengers at different positions within its range of action. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a counter-rotating booster fan that can realize zone control within its range of action so that different air volume requirements of passengers at different positions within its range can be met.

[0005] The present invention also provides a vehicle having the counter-rotating supercharging fan.

[0006] In a first aspect, an embodiment of the present invention provides a counter-rotating booster fan, comprising: a first front fan and a first drive motor, the first drive motor being transmission-connected to the first front fan; a second front fan and a second drive motor, the second front fan being located on the circumferential outer side of the first front fan, the second drive motor being transmission-connected to the second front fan; a first rear fan and a third drive motor, the air inlet side of the first rear fan being opposite to the air outlet side of the first front fan, the third drive motor being transmission-connected to the first rear fan; a second rear fan and a fourth drive motor, the air inlet side of the second rear fan being opposite to the air outlet side of the second front fan, the fourth drive motor being transmission-connected to the second rear fan; a fan barrel shell, the fan barrel shell comprising an installation cavity, a first opening and a second opening communicating with the installation cavity, the first front fan, the second front fan, the first rear fan and the second rear fan being all located in the installation cavity; the air inlet side of the first front fan and the air inlet side of the second front fan both face the first opening, and the air outlet side of the first rear fan and the air outlet side of the second rear fan both face the second opening.

[0007] According to the counter-rotating booster fan of the present invention, on the one hand, by arranging a first drive motor, a second drive motor, a third drive motor and a fourth drive motor, the first front fan, the second front fan, the first rear fan and the second rear fan can be driven separately, so that the air volume in the area corresponding to the first rear fan and the area corresponding to the second rear fan can be independently adjusted, thereby meeting the different air volume requirements of different passengers in the area corresponding to the first rear fan and the area corresponding to the second rear fan, and meeting the personalized requirements of different passengers.

[0008] In some embodiments of the present invention, the fan cylinder shell includes: a first cylinder section, the first cylinder section is provided with a first mounting hole, a second mounting hole and a front hollow portion, the first front fan is provided at the first mounting hole, the second front fan is provided at the second mounting hole, and the front hollow portion is located between the first mounting hole and the second mounting hole.

[0009] In some embodiments of the present invention, the first barrel section includes a first enclosure plate and a second enclosure plate, the first enclosure plate and the second enclosure plate are located on the circumferential outer side of the first front fan and the second front fan, and surround the first mounting hole and the second mounting hole, and the first enclosure plate and the second enclosure plate are detachably connected.

[0010] In some embodiments of the present invention, the fan cylinder shell includes: a second cylinder section, the second cylinder section is provided with a third mounting hole, a fourth mounting hole and a rear hollow portion, the first rear fan is provided at the third mounting hole, the second rear fan is provided at the fourth mounting hole, and the rear hollow portion is located between the third mounting hole and the fourth mounting hole.

[0011] In some embodiments of the present invention, the second barrel section includes a third enclosure plate and a fourth enclosure plate, wherein the third enclosure plate and the fourth enclosure plate are located on the circumferential outer side of the first rear fan and the second rear fan, and surround the third mounting hole and the fourth mounting hole, and the third enclosure plate and the fourth enclosure plate are detachably connected.

[0012] In some embodiments of the present invention, the fan cylinder casing includes: a third cylinder section, including a first sub-cylinder section and a second sub-cylinder section, one end of the first sub-cylinder section is connected to the first cylinder section, and the other end is detachably connected to the second sub-cylinder section, and the end of the second sub-cylinder section facing away from the first cylinder section is connected to the second cylinder section.

[0013] In some embodiments of the present invention, the counter-rotating booster fan further includes: a buffer component, one end of the buffer component is connected to the first barrel section, and the other end of the buffer component is connected to the second barrel section.

[0014] In some embodiments of the present invention, the first front fan includes a plurality of first blades, the first blades have an installation angle of 30°-75°, and a chord length of 20mm-25mm, and the first rear fan includes a plurality of second blades, the second blades have an installation angle of 20°-45°, and a chord length of 20mm-35mm.

[0015] In some embodiments of the present invention, the first front fan includes a plurality of first blades, the first blades have an installation angle of 45°-75°, and a chord length of 20mm-25mm, and the first rear fan includes a plurality of second blades, the second blades have an installation angle of 35°-45°, and a chord length of 20mm-25mm.

[0016] In a second aspect, the present invention provides a vehicle, comprising: a vehicle body frame and a vehicle frame according to the embodiment of the first aspect of the present invention, wherein the counter-rotating supercharger fan is arranged on the vehicle frame.

[0017] According to the vehicle of the present invention, the overall performance of the vehicle can be improved by means of the above-mentioned counter-rotating supercharger fan.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 A schematic diagram of a counter-rotating booster fan provided in some embodiments of the present application;

[0021] Figure 2 Schematic diagram of a counter-rotating booster fan provided in some other embodiments of the present application;

[0022] Figure 3 for Figure 2 A partial structural schematic diagram of a counter-rotating booster fan shown in ;

[0023] Figure 4 for Figure 3 A schematic diagram of a first front fan and a first rear fan shown in ;

[0024] Figure 5 for Figure 3 A schematic diagram of the first front fan and the first rear fan at another angle shown in ;

[0025] Figure 6 for Figure 2 A schematic diagram of the first barrel section shown in ;

[0026] Figure 7for Figure 2 A schematic diagram of the second barrel section shown in ;

[0027] Figure 8 for Figure 3 A schematic diagram of a first front fan shown in ;

[0028] Fig. 9 for Figure 3 Schematic diagram of the first rear fan shown in .

[0029] Reference numerals:

[0030] 100. Counter-rotating booster fan;

[0031] 110. first front fan; 111. first blade; 112. first blade crown;

[0032] 120, first rear fan; 121, second blade; 122, second blade crown;

[0033] 130, second front fan;

[0034] 140, second rear fan;

[0035] 150, fan cylinder shell; 151, first cylinder section; 1511, first mounting hole; 1512, second mounting hole; 1513, front hollow portion; 152, second cylinder section; 1521, third mounting hole; 1522, fourth mounting hole; 1523, rear hollow portion; 153, third cylinder section; 1531, first sub-cylinder section; 1532, second sub-cylinder section;

[0036] 160, buffer; 170, cap; 180, tail vertebrae; 190, connecting flange;

[0037] 200, front controller; 300, rear controller; 400, drive motor mounting plate; 500, front air guide support plate; 600, rear air guide support plate. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] In the related technologies, automotive boost fans usually adopt centrifugal structures, which are large in size, seriously occupy the space inside the car, and are not flexible in layout, which has a certain impact on both the choice of automobile manufacturers and the use of consumers. In terms of boosting capacity, centrifugal boost fans have a simple structure and strong boosting capacity. Under the premise of not considering the space occupied, they are the first choice for pipeline boosting.

[0040] However, centrifugal boost fans take up a large amount of space inside the vehicle. Considering the crowded parts layout inside the vehicle, miniaturized boost fans have a broader market demand.

[0041] However, the existing vehicle booster fan can only deliver air at a single air volume within its range of action, and cannot meet the personalized needs of passengers at different positions within its range of action.

[0042] In order to solve the above technical problems, the present application provides a vehicle, which includes a frame and a counter-rotating supercharger fan, wherein the counter-rotating supercharger fan is arranged on the frame and is used to supply air to the space inside the vehicle.

[0043] For details, please refer to Figures 1 to 3 The counter-rotating booster fan 100 may include: a first front fan 110, a second front fan 130, a first rear fan 120, and a second rear fan 140. The air inlet side of the first rear fan 120 is opposite to the air outlet side of the first front fan 110, and the air inlet side of the second rear fan 140 is opposite to the air outlet side of the second front fan 130. Specifically, the first rear fan 120 rotates in the opposite direction to the first front fan 110, and the second rear fan 140 rotates in the opposite direction to the second front fan 130. The airflow flows from the first front fan 110 and the second front fan 130 to the first rear fan 120 and the second rear fan 140, respectively, and flows out from the first rear fan 120 and the second rear fan 140. Therefore, the counter-rotating booster fan 100 can achieve a high air volume and high efficiency use state through the cooperation between the first front fan 110 and the first rear fan 120, the second front fan 130 and the second rear fan 140.

[0044] Among them, the counter-rotating booster fan 100 can also include: a first drive motor, a second drive motor, a third drive motor and a fourth drive motor, the first drive motor is transmission connected to the first front fan 110; the second drive motor is transmission connected to the second front fan 130; the third drive motor is transmission connected to the first rear fan 120, and the fourth drive motor is transmission connected to the second rear fan 140.

[0045] Specifically, the first front fan 110 is connected to the output shaft of the first drive motor, the second front fan 130 is connected to the output shaft of the second drive motor, the first rear fan 120 is connected to the output shaft of the third drive motor, and the second rear fan 140 is connected to the output shaft of the fourth drive motor. In this way, by respectively controlling the first drive motor, the second drive motor, the third drive motor and the fourth drive motor, the rotational speeds of the first front fan 110, the second front fan 130, the first rear fan 120 and the second rear fan 140 are controlled, thereby achieving the control of the air volume and wind speed of the first rear fan 120 and the second rear fan 140 corresponding to different areas in the vehicle.

[0046] Among them, please refer to Figure 4 The first front fan 110 and the output shaft of the first drive motor, the second front fan 130 and the output shaft of the second drive motor, the first rear fan 120 and the output shaft of the third drive motor, and the second rear fan 140 and the output shaft of the fourth drive motor can be connected via a connecting flange 190.

[0047] It should be noted that, taking the first rear fan 120 and the second rear fan 140 being adjacently arranged in the left and right directions as an example, the first rear fan 120 corresponds to the left area, and the second rear fan 140 corresponds to the right area. The wind speed and air volume corresponding to the left area can be adjusted by adjusting the rotational speeds of the first drive motor and the third drive motor, and the wind speed and air volume corresponding to the right area can be adjusted by adjusting the rotational speeds of the second drive motor and the fourth drive motor, thereby realizing the function of independent air volume zoning and achieving the effect of regional control.

[0048] Furthermore, the first and third drive motors can be controlled to stop running, and the counter-rotating booster fan 100 can only supply air to the right area. The second and fourth drive motors can also be controlled to stop running, and the counter-rotating booster fan 100 can only supply air to the left area.

[0049] Among them, under the premise of the same output power of the fan, the space occupied by the counter-rotating supercharger fan is smaller than that occupied by the centrifugal supercharger fan. Therefore, by providing the first front fan 110 and the first rear fan 120, the second front fan 130 and the second rear fan 140, two sets of counter-rotating fans, through reasonable design of the shape, the space occupied by the vehicle supercharger fan can be reduced, and the efficiency of the vehicle supercharger fan can be improved.

[0050] The counter-rotating supercharged fan 100 may further include a fan cylinder housing 150, and the fan cylinder housing 150 includes a mounting cavity. A first opening and a second opening are connected to the mounting cavity, and the first front fan 110, the second front fan 130, the first rear fan 120, and the second rear fan 140 are all located in the mounting cavity, and the air inlet side of the first front fan 110 and the air inlet side of the second front fan 130 are both facing the first opening, and the air outlet side of the first rear fan 120 and the air outlet side of the second rear fan 140 are both facing the second opening.

[0051] Therefore, by setting the fan cylinder shell 150, the first front fan 110, the second front fan 130, the first rear fan 120 and the second rear fan 140 are assembled into a whole, and the counter-rotating booster fan 100 is modularized, which is beneficial to the assembly and replacement of the counter-rotating booster fans 100 on the vehicle.

[0052] In some embodiments of the present invention, the counter-rotating booster fan 100 further includes a controller, and the first drive motor, the second drive motor, the third drive motor and the fourth drive motor are respectively communicatively connected to the controller.

[0053] For details, please refer to Figure 5 The controller may include a front controller 200 and a rear controller 300, the front controller 200 is communicatively connected to the first driving motor, and the rear controller 300 is communicatively connected to the third driving motor.

[0054] In some embodiments of the present invention, the first drive motor, the second drive motor, the third drive motor and the fourth drive motor are all fixed in the installation cavity by means of a fixing flange.

[0055] In some embodiments of the present invention, please refer to Figure 4 and Figure 5 The air inlet side of the first front fan 110 and the second front fan 130 are both provided with a cap cover 170 , and the air outlet side of the first rear fan 120 and the second rear fan 140 are both provided with a tail cone 180 .

[0056] In some embodiments of the present invention, please continue to refer to Figure 1 and Figure 2 The fan casing 150 is formed into a cylindrical shape with openings at both ends, wherein the openings at the two ends are respectively a first opening and a second opening. In the direction from the first opening to the second opening, the fan casing 150 may include a first barrel section 151 and a second barrel section 152.

[0057] Among them, see Figure 6 The first barrel section 151 is provided with a first mounting hole 1511, a second mounting hole 1512 and a front hollow portion 1513. The first front fan 110 is provided at the first mounting hole 1511, and the second front fan 130 is provided at the second mounting hole 1512. The hollow portion is located between the first mounting hole 1511 and the second mounting hole 1512. Thus, by providing the first mounting hole 1511 and the second mounting hole 1512, installation positions are provided for the first front fan 110 and the second front fan 130.

[0058] It can be understood that during the operation of the first front fan 110 and the second front fan 130, the first front fan 110 and the second front fan 130 will experience radial vibration and radial movement. By setting the front hollow portion 1513 between the first mounting hole 1511 and the second mounting hole 1512, a buffering and energy absorption can be provided for the vibration of the first front fan 110 and the second front fan 130, thereby reducing the hard collision between the first front fan 110, the second front fan 130 and the first barrel section 151, and improving the stability of the device during operation.

[0059] See also Figure 6 The first mounting hole 1511 and the second mounting hole 1512 are arranged adjacent to each other. The first mounting hole 1511 and the second mounting hole 1512 are both formed as round holes. There are two front hollow portions 1513, which are respectively located on the upper and lower sides of the connection between the first mounting hole 1511 and the second mounting hole 1512.

[0060] In some embodiments of the present invention, a buffer pad may be provided between the first front fan 110 and the inner circumferential wall of the first mounting hole 1511, further providing a buffer between the first front fan 110 and the first barrel section 151. A buffer pad may also be provided between the second front fan 130 and the inner circumferential wall of the second mounting hole 1512, further providing a buffer between the second front fan 130 and the first barrel section 151.

[0061] In some embodiments of the present invention, please continue to refer to Figure 6 A driving motor mounting plate 400 is provided at the first mounting hole 1511 , and the driving motor mounting plate 400 is used to provide a mounting position for the first driving motor.

[0062] In some embodiments of this application, please continue to refer to Figure 6 A plurality of front air guide support plates 500 are further provided at the first mounting hole 1511. The plurality of front air guide support plates 500 are spaced apart in the circumferential direction of the first mounting hole 1511. Specifically, the number of the front air guide support plates 500 may be three. The plurality of front air guide support plates 500 are arranged at unequal intervals, which can reduce the high-frequency order noise when the high-speed airflow blows through the front air guide support plates 500. The installation angle of the front air guide support plates 500 is between 35° and 55°, which can adapt to the air outlet rotation angle of the first front fan 110.

[0063] Understandably, please continue to refer to Figure 6 A driving motor mounting plate 400 and a plurality of front air guide support plates 500 may be provided at the second mounting hole 1512 .

[0064] In some embodiments of the present invention, the first barrel section 151 may include a first enclosure plate and a second enclosure plate, which are located on the circumferential outside of the first front fan 110 and the second front fan 130 and enclose a first mounting hole 1511 and a second mounting hole 1512. The first enclosure plate is detachably connected to the second enclosure plate, thereby facilitating the assembly between the first front fan 110, the second front fan 130 and the first barrel section 151.

[0065] Specifically, the first enclosure is disassembled from the second enclosure, the first front fan 110 and the second front fan 130 are installed at the relative positions of the first mounting hole 1511 and the second mounting hole 1512, and then the first enclosure is assembled with the second enclosure, wherein the first enclosure and the second enclosure can be connected by screws.

[0066] See also Figure 7The second barrel section 152 is provided with a third mounting hole 1521, a fourth mounting hole 1522 and a rear hollow portion 1523, the first rear fan 120 is provided at the third mounting hole 1521, the second rear fan 140 is provided at the fourth mounting hole 1522, and the rear hollow portion 1523 is located between the third mounting hole 1521 and the fourth mounting hole 1522. Thus, by providing the third mounting hole 1521 and the fourth mounting hole 1522, mounting positions are provided for the first rear fan 120 and the second rear fan 140.

[0067] It can be understood that during the operation of the first rear fan 120 and the second rear fan 140, the first rear fan 120 and the second rear fan 140 will experience radial vibration and radial movement. By setting the rear hollow portion 1523 between the third mounting hole 1521 and the fourth mounting hole 1522, a buffering and energy absorption can be provided for the vibration of the first rear fan 120 and the second rear fan 140, thereby reducing the hard collision between the first rear fan 120, the second rear fan 140 and the second barrel section 152, and improving the stability of the device during operation.

[0068] Please continue to refer to Figure 7 The third mounting hole 1521 is adjacent to the fourth mounting hole 1522. The third mounting hole 1521 and the fourth mounting hole 1522 are both formed as round holes. There are two rear hollow portions 1523. The two rear hollow portions 1523 are respectively located on the upper and lower sides of the connection between the third mounting hole 1521 and the fourth mounting hole 1522.

[0069] In some embodiments of the present invention, a buffer pad may be provided between the first rear fan 120 and the inner circumferential wall of the third mounting hole 1521, further providing a buffer between the first rear fan 120 and the second barrel section 152. A buffer pad may also be provided between the second rear fan 140 and the inner circumferential wall of the fourth mounting hole 1522, further providing a buffer between the second rear fan 140 and the second barrel section 152.

[0070] In some embodiments of the present invention, please continue to refer to Figure 7 A driving motor mounting plate 400 is provided at the third mounting hole 1521 , and the driving motor mounting plate 400 is used to provide a mounting position for the third driving motor.

[0071] In some embodiments of this application, please continue to refer to Figure 7 A plurality of rear air guide support plates 600 are further provided at the third mounting hole 1521, and the plurality of rear air guide support plates 600 are spaced apart in the circumferential direction of the third mounting hole 1521. Specifically, the number of the rear air guide support plates 600 may be three, and the plurality of rear air guide support plates 600 are arranged at unequal intervals, which can reduce the high-frequency order noise when the high-speed airflow blows through the rear air guide support plates 600. The installation angle of the rear air guide support plates 600 is between 35° and 55°, which can adapt to the air outlet rotation angle of the first rear fan 120.

[0072] Understandably, please continue to refer to Figure 7 A driving motor mounting plate 400 and a plurality of rear air guide support plates 600 may be provided at the fourth mounting hole 1522 .

[0073] In some embodiments of the present invention, the second barrel section 152 may include a third enclosure plate and a fourth enclosure plate, which are located on the circumferential outer side of the first rear fan 120 and the second rear fan 140 and surround a third mounting hole 1521 and a fourth mounting hole 1522. The third enclosure plate is detachably connected to the fourth enclosure plate, thereby facilitating assembly between the first rear fan 120, the second rear fan 140 and the second barrel section 152.

[0074] Specifically, the third enclosure panel is disassembled from the fourth enclosure panel, the first rear fan 120 and the second rear fan 140 are installed at the relative positions of the third mounting hole 1521 and the fourth mounting hole 1522, and then the third enclosure panel is assembled with the fourth enclosure panel, wherein the third enclosure panel and the fourth enclosure panel can be connected with screws.

[0075] In some embodiments of the present invention, see Figure 6 and Figure 7 , and refer to Figure 2 The fan casing 150 may further include a third barrel section 153, which includes a first sub-segment 1531 and a second sub-segment 1532. One end of the first sub-segment 1531 is connected to the first barrel section 151, and the other end is detachably connected to the second sub-segment 1532. The end of the second sub-segment 1532 that is away from the first barrel section 151 is connected to the second barrel section 152. Thus, the connection between the first barrel section 151 and the second barrel section 152 is achieved through the third barrel section 153.

[0076] The detachable connection between the first sub-barrel section 1531 and the second sub-barrel section 1532 facilitates the maintenance and replacement of the first front fan 110, the second front fan 130, the first rear fan 120, and the second rear fan 140. Specifically, the first sub-barrel section 1531 and the second sub-barrel section 1532 are connected by screws.

[0077] In some embodiments of the present invention, see Figure 2 The counter-rotating booster fan 100 may further include a buffer 160 , one end of the buffer 160 is connected to the first barrel section 151 , and the other end of the buffer 160 is connected to the second barrel section 152 .

[0078] It can be understood that, taking the first front fan 110 and the first rear fan 120 as an example, during the operation of the first front fan 110 and the first rear fan 120, the first front fan 110 and the first rear fan 120 will experience axial vibration and displacement. By providing the buffer member 160 connected to the first barrel section 151 and the second barrel section 152, the axial vibration energy of the entire device can be absorbed, the hard collision between the first front fan 110, the first rear fan 120 and the fan barrel casing 150 can be reduced, and the overall operation stability of the equipment can be improved.

[0079] In a specific implementation process, there may be multiple buffer members 160 , and the multiple buffer members 160 are evenly spaced in the circumferential direction of the fan casing 150 .

[0080] The buffer member 160 can be made of rubber material, elastic plastic material, etc.

[0081] In some embodiments of the present invention, see Figure 8 and Fig. 9 The first front fan 110 includes a plurality of first blades 111, the installation angle of the first blades 111 is 30°-75°, and the chord length is 20mm-25mm. The first rear fan 120 includes a plurality of second blades 121, the installation angle of the second blades 121 is 20°-45°, and the chord length is 20mm-35mm.

[0082] In this way, by adjusting the parameters of the first blade 111 and the second blade 121, the air volume and air pressure range of the counter-rotating booster fan 100 can be adjusted to meet the usage requirements of different scenarios.

[0083] Preferably, the first blade 111 has an installation angle of 45°-75° and a chord length of 20mm-25mm, and the second blade 121 has an installation angle of 35°-45° and a chord length of 20mm-25mm.

[0084] In some embodiments of the present invention, the number of first blades 111 is greater than the number of second blades 121. In this way, it is possible to effectively avoid resonance when the rotation speeds of the first front fan 110 and the first rear fan 120 are the same, thereby preventing the generation of larger order noise, reducing the overall noise emitted by the counter-rotating booster fan 100, and improving the user experience.

[0085] In a specific implementation process, the number of the first blades 111 is 9, and the number of the second blades 121 is 7.

[0086] In some other embodiments of the present invention, the intervals between the multiple first blades 111 may be different, and the intervals between the multiple second blades 121 may be different.

[0087] It can be understood that the second front fan 130 may include a plurality of third blades, and the second rear fan 140 may include a plurality of fourth blades.

[0088] In some embodiments of the present invention, the first front fan 110 also includes a first blade crown 112, which is located on the circumferential outside of the plurality of first blades 111, and the top of the first blade 111 is connected to the first blade crown 112. By setting the first blade crown 112 on the first front fan 110, aerodynamic losses and aerodynamic noise caused by top gap leakage can be avoided, thereby improving the efficiency of the counter-rotating booster fan 100.

[0089] It is understandable that the first rear fan 120 may further include a second blade crown 122 , the second front fan 130 may further include a third blade crown, and the second rear fan 140 may further include a fourth blade crown.

[0090] In the description of the present invention, it is to be understood that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0091] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A counter-rotating booster fan, characterized in that: include: A first front fan and a first drive motor, wherein the first drive motor is drivingly connected to the first front fan; a second front fan and a second drive motor, wherein the second front fan is located outside the circumference of the first front fan, and the second drive motor is drivingly connected to the second front fan; a first rear fan and a third drive motor, wherein the air inlet side of the first rear fan is opposite to the air outlet side of the first front fan, and the third drive motor is drivingly connected to the first rear fan; a second rear fan and a fourth drive motor, wherein the air inlet side of the second rear fan is opposite to the air outlet side of the second front fan, and the fourth drive motor is drivingly connected to the second rear fan; A fan casing, the fan casing comprising a mounting cavity, a first opening and a second opening communicating with the mounting cavity, wherein the first front fan, the second front fan, the first rear fan and the second rear fan are all located in the mounting cavity; The air inlet side of the first front fan and the air inlet side of the second front fan both face the first opening, and the air outlet side of the first rear fan and the air outlet side of the second rear fan both face the second opening.

2. The counter-rotating booster fan according to claim 1, characterized in that: The fan casing comprises: The first barrel section is provided with a first mounting hole, a second mounting hole and a front hollow portion, the first front fan is provided at the first mounting hole, the second front fan is provided at the second mounting hole, and the front hollow portion is located between the first mounting hole and the second mounting hole.

3. The counter-rotating booster fan according to claim 2, characterized in that: The first barrel section includes a first enclosure plate and a second enclosure plate, the first enclosure plate and the second enclosure plate are located on the circumferential outer side of the first front fan and the second front fan, and surround the first mounting hole and the second mounting hole, and the first enclosure plate and the second enclosure plate are detachably connected.

4. The counter-rotating booster fan according to claim 2, characterized in that: The fan casing comprises: The second barrel section is provided with a third mounting hole, a fourth mounting hole and a rear hollow portion, the first rear fan is provided at the third mounting hole, the second rear fan is provided at the fourth mounting hole, and the rear hollow portion is located between the third mounting hole and the fourth mounting hole.

5. The counter-rotating booster fan according to claim 4, characterized in that: The second barrel section includes a third enclosure plate and a fourth enclosure plate, which are located on the circumferential outer sides of the first rear fan and the second rear fan and surround the third mounting hole and the fourth mounting hole, and the third enclosure plate and the fourth enclosure plate are detachably connected.

6. The counter-rotating booster fan according to claim 4, characterized in that: The fan casing comprises: The third barrel segment includes a first sub-segment and a second sub-segment, wherein one end of the first sub-segment is connected to the first barrel segment, and the other end is detachably connected to the second sub-segment, and the end of the second sub-segment facing away from the first barrel segment is connected to the second barrel segment.

7. The counter-rotating booster fan according to claim 4, characterized in that: Also includes: A buffer component, one end of which is connected to the first barrel section, and the other end of which is connected to the second barrel section.

8. The counter-rotating booster fan according to claim 1, characterized in that: The first front fan includes a plurality of first blades, the installation angle of the first blades is 30°-75°, and the chord length is 20mm-25mm. The first rear fan includes a plurality of second blades, the installation angle of the second blades is 20°-45°, and the chord length is 20mm-35mm.

9. The counter-rotating booster fan according to claim 8, characterized in that: The first front fan includes a plurality of first blades, the installation angle of the first blades is 45°-75°, and the chord length is 20mm-25mm. The first rear fan includes a plurality of second blades, the installation angle of the second blades is 35°-45°, and the chord length is 20mm-25mm.

10. A vehicle, characterized in that: include: Frame; The counter-rotating booster fan according to any one of claims 1 to 9, wherein the counter-rotating booster fan is arranged on the frame.

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