WO2024120508A1 - 吹风机 - Google Patents

吹风机 Download PDF

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Publication number
WO2024120508A1
WO2024120508A1 PCT/CN2023/137337 CN2023137337W WO2024120508A1 WO 2024120508 A1 WO2024120508 A1 WO 2024120508A1 CN 2023137337 W CN2023137337 W CN 2023137337W WO 2024120508 A1 WO2024120508 A1 WO 2024120508A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
motor
hair dryer
gear
dryer according
Prior art date
Application number
PCT/CN2023/137337
Other languages
English (en)
French (fr)
Inventor
李经纬
展锐
Original Assignee
南京泉峰科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京泉峰科技有限公司 filed Critical 南京泉峰科技有限公司
Publication of WO2024120508A1 publication Critical patent/WO2024120508A1/zh

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0809—Loosening or dislodging by blowing ; Drying by means of gas streams
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
    • A01G20/40—Apparatus for cleaning the lawn or grass surface
    • A01G20/43—Apparatus for cleaning the lawn or grass surface for sweeping, collecting or disintegrating lawn debris
    • A01G20/47—Vacuum or blower devices
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles

Definitions

  • the present application relates to the technical field of garden tools, and in particular to a hair dryer.
  • a hair dryer is a common gardening tool, which is mainly used to blow away fallen leaves, road dust, accumulated water, snow and other debris. Hair dryers basically use a single fan blade. Due to the characteristics of axial flow fans, they cannot produce high wind speeds, and thus cannot meet users' demand for high wind speeds. In addition, the guide vanes used to guide the direction of the airflow cause a certain amount of energy loss and waste energy.
  • the purpose of the present application is to provide a hair dryer to increase the wind speed of the hair dryer and reduce the efficiency loss caused by the guide vanes.
  • the present application provides a hair dryer, which includes: a shell, the shell forming an air inlet and an air outlet, air flow flows in from the air inlet and flows out from the air outlet; a fan assembly, the fan assembly includes at least a first fan and a second fan; in one working mode of the hair dryer, the first fan and the second fan rotate in opposite directions.
  • both the first fan and the second fan can generate an airflow flowing from the air inlet to the air outlet.
  • the hair dryer further includes a first motor, and the first fan and the second fan are both driven by the first motor.
  • the first motor is located on the same side of the first fan and the second fan.
  • the first motor is located between the first fan and the second fan.
  • the hair dryer further includes a first motor and a second motor, the first fan is driven by the first motor, and the second fan is driven by the second motor.
  • the first fan and the second fan are located between the first motor and the second motor.
  • the first fan and the second fan are located on one side of the first motor and the second motor respectively.
  • the first fan and the second fan are located on both sides of the first motor and the second motor.
  • the rotation speed of the first fan is a first rotation speed n1
  • the rotation speed of the second fan is a second rotation speed n2
  • a ratio n1/n2 of the first rotation speed n1 to the second rotation speed n2 is greater than or equal to 0.2 and less than or equal to 5.
  • the power of the first fan is a first power P1
  • the power of the second fan is a second power P2
  • a ratio P1/P2 of the first power P1 to the second power P2 is greater than or equal to 0.5 and less than or equal to 2.
  • the chord length of the first fan is a first chord length L1
  • the chord length of the second fan is a second chord length L2
  • a ratio L1/L2 of the first chord length L1 to the second chord length L2 is greater than or equal to 0.65 and less than or equal to 1.
  • the outlet angle of the blades of the first fan and the inlet angle of the blades of the second fan are substantially equal.
  • the hair dryer further comprises a driving shaft, the driving shaft is driven to rotate by the first motor, and the first fan is driven by the driving shaft to rotate in the same direction as that of the driving shaft.
  • the hair dryer further comprises a reversing assembly, the driving shaft is connected to the reversing assembly, and the reversing assembly drives the second fan to rotate.
  • the reversing assembly includes a first gear, a second gear and a third gear, and the second gear is located between the first gear and the third gear.
  • the present application provides a hair dryer, which is provided with a first fan and a second fan, and the first fan and the second fan rotate in opposite directions, so that the second fan can absorb the radial force generated by the first fan on the airflow, so that the radial force becomes useful work on the second fan, and the efficiency loss caused by the guide vane is reduced, and the airflow direction is adjusted after the airflow passes through the second fan to achieve axial movement.
  • the present solution increases the speed of the airflow flowing out of the air outlet, meeting the user's demand for high wind speed.
  • FIG1 is a schematic structural diagram of a hair dryer in a first embodiment of the present application.
  • FIG2 is a schematic diagram of the internal structure of the hair dryer in Example 1 of the present application.
  • FIG3 is a schematic diagram of the transmission structure of the hair dryer in the first embodiment of the present application from a first viewing angle
  • FIG4 is a schematic diagram of the transmission structure of the hair dryer in the first embodiment of the present application from a second viewing angle
  • FIG5 is a schematic diagram of the transmission structure of the hair dryer in the first embodiment of the present application, in which the first fan is hidden;
  • FIG6 is a schematic diagram of the internal structure of the hair dryer in the second embodiment of the present application.
  • FIG7 is a schematic structural diagram of the transmission structure of the hair dryer in the second embodiment of the present application.
  • FIG8 is a schematic diagram of the interior of a hair dryer in Embodiment 3 of the present application.
  • FIG9 is a schematic diagram of the interior of a hair dryer in Embodiment 4 of the present application.
  • FIG10 is a perspective view of airflow passing through a first fan and a second fan in the present application.
  • FIG11 is a plan view of airflow passing through a first fan and a second fan in the present application.
  • FIG12 is a cross-sectional view of the internal structure of the hair dryer in Embodiment 5 of the present application.
  • FIG13 is an exploded view of the hair dryer in Embodiment 5 of the present application at a certain viewing angle
  • FIG14 is an exploded view of the hair dryer in Embodiment 5 of the present application from another viewing angle;
  • FIG15 is a schematic diagram of a fan assembly and a drive assembly of a hair dryer in Embodiment 5 of the present application;
  • FIG16 is an exploded view of a portion of the structure in FIG15 at a certain viewing angle
  • FIG17 is an exploded view of a portion of the structure in FIG15 from another perspective
  • FIG18 is an exploded view of the structure in FIG16 which is further disassembled;
  • FIG19 is an exploded view of the structure in FIG17 which is further disassembled;
  • FIG20 is a cross-sectional view of a hair dryer in Embodiment 6 of the present application.
  • FIG21 is a schematic diagram of the interior of a hair dryer in Embodiment 6 of the present application.
  • FIG. 22 is an exploded view of the structure in FIG. 21 .
  • the terms “comprises,””includes,””has,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
  • the phrase “comprises a list of elements” is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. "" does not exclude the existence of other identical elements in the process, method, article or device that includes the element.
  • the term "and/or” is a description of the association relationship between related objects, indicating that three relationships can exist.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this application generally indicates that the related objects before and after are in an "and/or” relationship.
  • connection may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation.
  • direct connection refers to two parts or components being connected together without the need for an intermediate piece
  • indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece.
  • connect and “couple” are not limited to physical or mechanical connection or coupling, and may include electrical connection or coupling.
  • relative terms e.g., "about,” “approximately,” “substantially,” etc.
  • the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not use relative terms should also be disclosed as specific values with tolerances.
  • substantially may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).
  • the function performed by a component can be performed by one component, multiple components, one part, or multiple parts.
  • the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.
  • the present application provides a hair dryer, which includes a housing 1 and a fan assembly 2, wherein the housing 1 forms an air inlet 11 and an air outlet 12, and air flows in from the air inlet 11 and flows out from the air outlet 12; the fan assembly 2 includes at least a first fan 21 and a second fan 22. In the operation mode, the first fan 21 and the second fan 22 rotate in opposite directions.
  • the second fan 22 can absorb the radial force generated by the first fan 21 on the airflow, so that the radial force becomes useful work for the second fan 22, reducing the efficiency loss caused by the guide vane, and adjusting the direction of the airflow after the airflow passes through the second fan 22 to achieve axial movement.
  • this solution increases the speed of the airflow flowing out of the air outlet 12, meeting the user's demand for high wind speed.
  • the first fan 21 and the second fan 22 can both generate airflow flowing from the air inlet 11 to the air outlet 12.
  • the first fan 21 and the second fan 22 both have an air inlet side and an air outlet side, the air inlet sides of the two fans are in the same direction and are both arranged toward the air inlet 11, and the air outlet sides of the two fans are in the same direction and are both arranged toward the air outlet 12.
  • the first fan 21 and the second fan 22 are coaxially arranged. The coaxially arranged first fan 21 and the second fan 22 can achieve the superposition of airflow velocities.
  • the hair dryer has a first working mode, in which the first fan 21 and the second fan 22 rotate in opposite directions.
  • the hair dryer may also have other working modes.
  • the hair dryer may have a second working mode, in which the first fan 21 and the second fan 22 rotate in the same direction.
  • the hair dryer may have a third working mode, in which only one of the first fan 21 and the second fan 22 rotates and the other remains stationary.
  • the first working mode can achieve an increase in wind speed
  • the second working mode can achieve an increase in air volume
  • the third working mode can save energy. In this way, the hair dryer can be switched between different working modes to meet the different needs of users.
  • the fan assembly 2 may also include a third fan.
  • the rotation direction of the third fan and the first fan 21 is the same or opposite, and when working, the third fan can generate an airflow from the air inlet 11 to the air outlet 12 to further increase the flow rate of the airflow.
  • the fan assembly 2 may further include a fourth fan.
  • two of the four fans form a group, and in one working mode of the hair dryer, the two fans in the same group rotate in different directions.
  • two of the four fans form a group, and when working, the two fans in the same group rotate in the same direction, and the fans in different groups rotate in different directions.
  • the fan assembly 2 may further include five or more fans.
  • at least two fans may be defined as a group, and the fans in the same group have different rotation directions.
  • at least two fans may be defined as a group, and the fans in the same group have the same rotation direction, and the fans in any two adjacent groups have different rotation directions.
  • the fan assembly 2 only includes the first fan 21 and the second fan 22 are used as examples for explanation.
  • the hair dryer also includes a first motor 31, and the first fan 21 and the second fan 22 are both driven by the first motor 31.
  • the arrangement that the first fan 21 and the second fan 22 are driven by the same motor makes the hair dryer less energy consuming, light in weight and low in cost.
  • the hair dryer includes a driving assembly 3, the driving assembly 3 includes a first motor 31 connected to the housing 1 and a transmission assembly 32, the transmission assembly 32 includes a driving input end and two driving output ends drivingly connected to the driving input end, the output end of the first motor 31 is drivingly connected to the driving input end, the first fan 21 is drivingly connected to one driving output end, and the second fan 22 is drivingly connected to the other driving output end.
  • the first motor 31 is located on the same side of the first fan 21 and the second fan 22.
  • the first fan 21 is located between the second fan 22 and the first motor 31, or the second fan 22 is located between the first fan 21 and the first motor 31.
  • the second fan 22 is located between the first fan 21 and the first motor 31, and the first fan 21 is close to the air inlet 11, and the first motor 31 is close to the air outlet 12. This position layout makes the distance between the first fan 21 and the second fan 22 smaller, and the loss of the airflow flowing out of the second fan 22 before reaching the first fan 21 is smaller.
  • the first motor 31 is located between the first fan 21 and the second fan 22. This arrangement helps to realize the installation and transmission of the first fan 21 and the second fan 22, and has a relatively simple structure and is easy to produce.
  • the transmission assembly 32 includes a housing 321, a driving shaft 322, a first driven shaft 324 and a second driven shaft 323.
  • the housing 321 is arranged on the housing 1, and the driving shaft 322 is rotatably arranged on the housing 321.
  • the end of the driving shaft 322 located outside the housing 321 is connected to the first motor 31.
  • the first driven shaft 324 is connected to the housing 321 in rotation, and the end of the first driven shaft 324 located in the housing 321 is connected to the end of the driving shaft 322 located in the housing 321, and the end of the first driven shaft 324 located outside the housing 321 is connected to the first fan 21.
  • the second driven shaft 323 is rotatably disposed in the box body 321 , one end of the second driven shaft 323 located in the box body 321 is drivingly connected to one end of the driving shaft 322 located in the box body 321 , and one end of the second driven shaft 323 located outside the box body 321 is connected to the second fan 22 .
  • the second driven shaft 323 has a through avoidance channel 3232, and the first driven shaft 324 is connected to the second fan 22 after passing through the avoidance channel 3232.
  • the avoidance channel 3232 can avoid the first driven shaft 324, so that the first driven shaft 324 can rotate coaxially with the second driven shaft 323, thereby greatly reducing the outer diameter of the hair dryer and further increasing the wind speed.
  • the first fan 21 is provided with a first fixing hole, and the first driven shaft 324 is a stepped shaft. After passing through the first fixing hole, the fan 21 is fixed by the first fixing member 211.
  • the first fixing member 211 includes a nut, and the first driven shaft 324 is provided with a stud. The nut and the stud are screwed together to lock the first fan 21 between the nut and the step of the first driven shaft 324.
  • the second fan 22 is provided with a second fixing hole, the second driven shaft 323 is a stepped shaft, and the second driven shaft 323 passes through the second fixing hole and is fixed by the second fixing member 221.
  • the second fixing member 221 includes a nut, and the second driven shaft 323 is provided with a stud. The nut and the stud are screwed together to lock the second fan 22 between the nut and the step of the second driven shaft 323.
  • the transmission assembly 32 includes a box body 321 and an end cover 3211.
  • the box body 321 is provided with an opening.
  • the end cover 3211 is arranged at the opening of the box body 321 and is surrounded by the box body 321 to form an installation cavity.
  • the driving gear 3221, the first driven gear 3241 and the second driven gear 3231 are all located in the installation cavity, and the driving gear 3221 is connected to the driving shaft 322, the first driven gear 3241 is connected to the first driven shaft 324, and the second driven gear 3231 is connected to the second driven shaft 323, wherein the first driven gear 3241 and the second driven gear 3231 are both meshed with the driving gear 3221.
  • the box body 321 is provided with a first mounting hole, the driving shaft 322 is inserted into the first mounting hole, and a first bearing 33 is provided between the driving shaft 322 and the side wall of the first mounting hole.
  • the box body 321 is provided with a second mounting hole, and the end cover 3211 is provided with a third mounting hole, and the second mounting hole and the third mounting hole are coaxially arranged, wherein the second driven shaft 323 is inserted into the third mounting hole, and a second bearing 34 is provided between the second driven shaft 323 and the side wall of the third mounting hole; one end of the first driven shaft 324 is inserted into the second mounting hole, and a third bearing 35 is provided between the first driven shaft 324 and the side wall of the second mounting hole; a fourth mounting hole is provided in the housing 1, and the other end of the first driven shaft 324 passes through the avoidance channel 3232 and then is inserted into the fourth mounting hole, and a fourth bearing 36 is provided between the first driven shaft 324 and the side wall of the fourth mounting hole.
  • the driving assembly 3 further includes a third fixing member 3242.
  • the third fixing member 3242 After one end of the first driven shaft 324 passes through the second mounting hole, it is connected to the third fixing member 3242, wherein the outer diameter of the third fixing member 3242 is larger than the inner diameter of the inner ring of the third bearing 35 to prevent the first driven shaft 324 from moving backward.
  • the first driven shaft 324 is provided with a step at the portion of the mounting cavity, and one end of the first driven gear 3241 abuts against the step, and the other end abuts against the inner ring of the third bearing 35 to prevent the first driven shaft 324 from moving forward.
  • a battery pack coupling portion 13 is provided at one end of the housing 1 close to the air inlet 11 for placing a battery pack, which is used to supply power to the first motor 31 .
  • the speed of the first fan 21 is a first speed n1
  • the speed of the second fan 22 is a second speed n2
  • the ratio n1/n2 of the first speed n1 to the second speed n2 is greater than or equal to 0.2 and less than or equal to 5.
  • the ratio of the speeds of the two fans is greater than or equal to 0.5 and less than or equal to 1.
  • the speed here refers to the speed when the two fans are running smoothly.
  • This unstable running state may include: sudden acceleration at the beginning of the motor starting, sudden changes in speed caused by the user's acceleration and deceleration operations, speed reduction caused by normal braking of the motor, abnormal braking of the motor caused by accidental power failure, etc.
  • the power of the first fan 21 is the first power P1
  • the power of the second fan 22 is the second power P2
  • the ratio P1/P2 of the first power P1 to the second power P2 is greater than or equal to 0.5 and less than or equal to 2.
  • the power here refers to the power output to the fan by the motor that drives the fan to rotate.
  • the first power P1 refers to the power output to the first fan 21 by the motor that drives the first fan 21 to rotate
  • the second power P2 refers to the power output to the second fan 22 by the motor that drives the second fan 22 to rotate.
  • the first power P1 and the second power P2 are output by the same motor; when the first fan 21 and the second fan 22 use two different motors, the first power P1 and the second power P2 are output by different motors.
  • chord length ratio L1/L2 of the first fan 21 and the second fan 22 is greater than or equal to 0.65 and less than or equal to 1. In one embodiment, the chord length ratio L1/L2 of the first fan 21 and the second fan 22 is 3/4.
  • the chord length here refers to the chord length of the blades of the first fan 21 and the second fan 22. The definition of the chord length is common knowledge in the art and will not be elaborated here.
  • the outlet angle of the blades of the first fan 21 is substantially equal to the inlet angle of the blades of the second fan 22.
  • This arrangement makes the angle of the airflow when it flows out of the first fan 21 substantially equal to the inlet angle of the blades of the second fan 22, which greatly helps to increase the wind speed.
  • the inlet angle and outlet angle of the blades described here are also common knowledge in the art and will not be described in detail here.
  • the structure is substantially the same as the embodiment disclosed in FIGS. 2 to 5 , except for the driving mode of the first fan 21 and the second fan 22.
  • the hair dryer further comprises a first motor 31 and a second motor 4, the first fan 21 is driven by the first motor 31, and the second fan 22 is driven by the second motor 4.
  • the above-mentioned structure is convenient for controlling the rotation speed of the first fan 21 and the second fan 22.
  • the first fan 21 and the second fan 22 are located between the first motor 31 and the second motor 4, thereby reducing the air volume loss caused by the distance between the two fans.
  • the first fan 21 and the second fan 22 are respectively located on one side of the first motor 31 and the second motor 4.
  • the first fan 21, the first motor 31, the second fan 22 and the second motor 32 are sequentially arranged in the direction from the air inlet 11 to the air outlet 12.
  • the first motor 31, the first fan 21 and the second motor 31 are sequentially arranged in the direction from the air inlet 11 to the air outlet 12. 21 , a second motor 32 and a second fan 22 .
  • the first fan 21 and the second fan 22 are located on both sides of the first motor 31 and the second motor 4. Specifically, in the direction from the air inlet 11 to the air outlet 12, the first fan 21, the first motor 31, the second motor 32 and the second fan 22 are sequentially arranged.
  • a battery pack coupling portion 13 is provided at one end of the housing 1 close to the air inlet 11 for placing a battery pack, which is used to supply power to the first motor 31 and the second motor 4 .
  • FIG10 and FIG11 are schematic diagrams showing the process of airflow flowing through two fans in the process of flowing in from the air inlet 11 and flowing out from the air outlet 12, wherein the inlet angle of one of the first fan 21 and the second fan 22 is equal to the outlet angle of the other.
  • the airflow flows from the air inlet 11 to the first fan 21 in the direction of V1, and after passing through the first fan 21 with a rotation direction of R1, the airflow is adjusted to the direction of V2, and flows to the second fan 22 in the direction of V2, and after passing through the second fan 22 with a rotation direction of R2, the airflow is adjusted to the direction of V3, and flows to the air outlet 12 in the direction of V3.
  • the rotation directions of R1 and R2 are opposite.
  • Figures 12 to 19 show a new embodiment of the internal structure of a hair dryer.
  • the housing 1 includes a first housing 110, a second housing 120 and a third housing 130 connected in sequence.
  • the first housing 110 is an air inlet housing of the hair dryer, and air flows in from the open end of the first housing 110, flows through the second housing 120, and blows out from the open end of the third housing 130.
  • the fan assembly 2 and the drive assembly 3 are arranged in the housing 1, wherein the drive assembly 3 includes a first motor 31 and a transmission assembly 32.
  • Figure 15 shows a schematic diagram of the fan assembly 2 and the drive assembly 3
  • Figures 16 and 17 are exploded views of the structure in Figure 15 from two perspectives
  • Figures 18 and 19 are exploded views of the structures in Figures 17 and 18 that are further split.
  • the transmission assembly 32 includes a driving shaft 322, a first driven shaft 324, and a second driven shaft 323, and the reversing assembly 37 is arranged on the outside of the first fan 21 and the second fan 22.
  • the driving shaft 322 is connected to the first motor 31, and the rotation of the first motor 31 drives the driving shaft 322 to rotate.
  • the rotation of the driving shaft 322 simultaneously drives the first fan 21 and the second fan 22 to rotate in opposite directions.
  • the driving shaft 322 drives the first driven shaft 324 to rotate, and the first driven shaft 324 drives the reversing assembly 37 to move, so that the reversing assembly 37 outputs a rotation opposite to the rotation direction of the driving shaft 322.
  • the reversing assembly 37 is connected to the second driven shaft 323, and outputs the rotation direction opposite to the first direction to the second fan 22 through the second driven shaft 323.
  • the reversing assembly 37 is used to convert the input rotational motion to the opposite direction and output it.
  • the reversing assembly 37 includes a first gear 371, a second gear 372 and a third gear 373.
  • the first gear 371 and the third gear 373 are substantially parallel, and the second gear 372 is disposed between the first gear 371 and the third gear 373 and is substantially perpendicular to the first gear 371.
  • the third gear 373 will rotate in a direction opposite to the first direction.
  • the three gears may be bevel gears or helical gears.
  • the three gears 373 are fixedly connected or coupled to the second driven shaft 323 , and the direction of rotation of the input from the reversing component 37 is opposite to the direction of rotation of the output through the above setting of the reversing component 37 .
  • one end of the driving shaft 322 is a motor coupling portion 3223, and the motor coupling portion 3223 extends into the interior of the first motor 31, and the other end of the driving shaft 322 is a first driving portion 3222.
  • One end of the first driven shaft 324 is a first coupling portion 3242, and the other end is a second driving portion 3241.
  • the first coupling portion 3242 is matched with the first driving portion 3222 in shape.
  • the first gear 371 includes a second coupling portion 3711, and the second driving portion 3241 is matched with the second coupling portion 3711 in shape.
  • the second driven shaft 323 includes an opening, which allows the second driving portion 3241 to extend from the second fan 22, and then pass through the second driven shaft 323 to extend to the first gear 371 of the reversing assembly 37.
  • the second driving portion 3241 is matched with the first gear 371 through the flat position, and the second driving portion 3241 directly drives the movement of the first gear 371, and the two rotate in the same direction.
  • the second driven shaft 323 includes a third driving portion 3231, and the second fan 22 includes a third combining portion 222, and the third combining portion 222 is shaped to match the third driving portion 3231. Therefore, after the reversing action of the reversing assembly 37, the rotation in the opposite direction to the driving shaft 322 is transmitted to the second fan 22. Since the first fan 21 is shaped to match the driving shaft 322, the first fan 21 and the driving shaft 322 have the same rotation direction, and therefore, the first fan 21 and the second fan 22 have opposite rotation directions.
  • first driving part 3222 and the first combining part 3242, the second driving part 3241 and the second combining part 3711, and the third driving part 3231 and the third combining part 222 can be matched in shape through flat positions, plug-in grooves, etc., or can be fastened through threads, etc., which will not be elaborated here.
  • a support member 51 is provided between the first fan 21 and the second fan 22, and the support member 51 includes two support rods 511 and a connecting portion 512.
  • the first driving portion 3222 and the first coupling portion 3242 both partially extend into the connecting portion 512, and the connecting portion 512 provides a fulcrum for supporting the first fan 21 and the second fan 22.
  • the driving shaft 3223 and the two support rods 511 of the first fan 21 are basically arranged in a straight line, and both pass through the center of the connecting portion 512.
  • the second housing 120 includes a slot 121 and a first opening 122 located in the slot 121, and the third housing 130 includes an extension portion 131 and a second opening 132 on the extension portion 131.
  • the support rod 511 extends into the first opening 122 through the slot 121, and the first opening 122 and the second opening 132 jointly limit the position of the flat position at the end of the support rod 511.
  • the first driving portion 3222 and the motor coupling portion 3223 provide two supporting forces for the first fan 21.
  • a first motor housing 111 is disposed in the first housing 110, and a second motor housing 123 is disposed in the second housing 120.
  • the first motor housing 111 and the second motor housing 123 form an accommodating space, which provides support for the first motor 31.
  • a transmission housing 133 is disposed in the third housing 130, and the transmission housing 32 supports a part of the transmission assembly 32, specifically, the reversing assembly 37. Multiple screws of the reversing assembly 37 are matched with threaded holes on the transmission housing 32. In this arrangement, the fan assembly 2 and the drive assembly 3 are reasonably installed in the housing 1, thereby maintaining smooth transmission.
  • the first motor 31 drives the first fan 21
  • the first motor 31 is connected to the driving shaft 322, and the rotation of the first motor 31 directly drives the driving shaft 322 to rotate.
  • the driving assembly 3 of this embodiment also includes a reversing assembly 37, and the reversing assembly 37 includes a first gear 371, a second gear 372 and a third gear 373.
  • the working principle of the reversing assembly 37 is also similar to that of the previous embodiment, and will not be repeated here.
  • one end of the driving shaft 322 is a first driving portion 3222.
  • the first fan 21 includes a fourth coupling portion 212, and the first driving portion 3222 passes through the first gear 371, the third gear 373, and the second fan 22, and finally cooperates with the fourth coupling portion 212, so that the rotation of the driving shaft 322 directly drives the first fan 21 to rotate.
  • the driving shaft 322 is further provided with a fourth driving part 323, and the first gear 371 is provided with a fourth combining part 3712.
  • the fourth driving part 323 and the fourth combining part 3712 can cooperate with each other, so that the rotation of the driving shaft 322 drives the rotation of the first gear 371, and the rotation is transmitted to the third gear 373 through the second gear 372, so that the third gear 373 outputs a rotation opposite to the first gear 371.
  • the third gear 373 is provided with a fifth driving part 3731, and the second fan 22 is provided with a fifth combining part 223.
  • the fifth driving part 3731 drives the fifth combining part 223 to rotate, so that the second fan 22 outputs a rotation speed opposite to that of the driving shaft 322.

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Abstract

本申请涉及一种吹风机，包括壳体和风扇组件，其中，壳体形成进风口和吹风口，气流从进风口流入，并从吹风口流出；风扇组件至少包括第一风扇和第二风扇；在吹风机的一种工作模式下，第一风扇和第二风扇旋转方向相反。该吹风机通过至少设置第一风扇和第二风扇，一方面使得气流的流速进行叠加，从而使得气流从吹风口流出的速度得到提高，满足用户对高风速的需求。另一方面，第一风扇和第二风扇旋转方向相反，使得第二风扇可以吸收第一风扇对气流产生的径向分力，使径向分力变成对第二风扇的有用功，并且使得气流经过第二风扇后，实现沿轴向运动。此外，两个风扇使得气流从吹风口流出的速度得到提高，满足用户对高风速的需求。

Description

吹风机
本申请要求在2022年12月09日提交中国专利局、申请号为202211582920.X的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及园林工具技术领域，尤其涉及一种吹风机。
背景技术
吹风机属于一种常规的园林工具，其主要用于吹扫落叶、路面灰尘、积水、积雪等杂物。吹风机基本使用单个风叶，由于轴流风机的特性，导致无法产生较高的风速，进而无法满足用户对高风速的需求。此外，用于引导气流流向的导叶造成了一定的能量损耗，浪费能源。
为此，亟需研究一种吹风机，以解决吹风机风速较小的问题。
发明内容
本申请的目的在于提供一种吹风机，以提高吹风机风速，减少导叶引起的效率损失。
为达上述目的，本申请采用以下技术方案：
本申请提供一种吹风机，该吹风机包括：壳体，所述壳体形成进风口和吹风口，气流从所述进风口流入，并从所述吹风口流出；风扇组件，所述风扇组件至少包括第一风扇和第二风扇；在所述吹风机的一种工作模式下，所述第一风扇和所述第二风扇的旋转方向相反。
在一种实施例中，所述第一风扇和所述第二风扇均能产生从所述进风口流动至所述吹风口的气流。
在一种实施例中，所述吹风机还包括第一马达，所述第一风扇和所述第二风扇均被所述第一马达驱动。
在一种实施例中，所述第一马达位于所述第一风扇和所述第二风扇的同一侧。
在一种实施例中，所述第一马达位于所述第一风扇和所述第二风扇之间。
在一种实施例中，所述吹风机还包括第一马达和第二马达，所述第一风扇由所述第一马达驱动，所述第二风扇由所述第二马达驱动。
在一种实施例中，所述第一风扇和所述第二风扇位于所述第一马达和所述第二马达之间。
在一种实施例中，所述第一风扇和所述第二风扇分别位于所述第一马达和所述第二马达一侧。
在一种实施例中，所述第一风扇和所述第二风扇位于所述第一马达和所述第二马达两侧。
在一种实施例中，所述第一风扇的转速为第一转速n1，所述第二风扇的转速为第二转速n2，所述第一转速n1与所述第二转速n2的比值n1/n2大于或等于0.2且小于或等于5。
在一种实施例中，所述第一风扇的功率为第一功率P1，所述第二风扇的功率为第二功率P2，所述第一功率P1与所述第二功率P2的比值P1/P2大于或等于0.5且小于或等于2。
在一种实施例中，所述第一风扇的弦长为第一弦长L1，所述第二风扇的弦长为第二弦长L2，所述第一弦长L1与所述第二弦长L2的比值L1/L2大于或等于0.65且小于或等于1。
在一种实施例中，所述第一风扇的扇叶的出口角和所述第二风扇的扇叶的进口角基本相等。
在一种实施例中，吹风机还包括主动轴，主动轴由第一马达驱动旋转，第一风扇由主动轴驱动、以与主动轴相同的旋转方向旋转。
在一种实施例中，吹风机还包括换向组件，主动轴连接至换向组件，换向组件驱动第二风扇转动。
在一种实施例中，换向组件包括第一齿轮、第二齿轮和第三齿轮，第二齿轮位于第一齿轮和所述第三齿轮之间。
本申请的效果为：
本申请提供一种吹风机，通过给吹风机设置第一风扇和第二风扇，且第一风扇和第二风扇的旋转方向相反，使得第二风扇可以吸收第一风扇对气流产生的径向分力，使径向分力变成对第二风扇的有用功，减少设置导叶造成的效率损失，并且使得气流经过第二风扇后，气流方向被调整，实现沿轴向运动。此外，本方案使得气流从吹风口流出的速度得到提高，满足用户对高风速的需求。
附图说明
图1为本申请一实施例一中吹风机的结构示意图；
图2为本申请实施例一中吹风机的内部结构示意图；
图3为本申请实施例一中吹风机的传动结构的第一视角示意图；
图4为本申请实施例一中吹风机的传动结构的第二视角示意图；
图5为本申请实施例一中吹风机的传动结构中隐去第一风扇的示意图；
图6为本申请实施例二中吹风机的内部结构示意图；
图7为本申请实施例二中吹风机的传动结构的结构示意图；
图8为本申请实施例三中吹风机的内部示意图；
图9为本申请实施例四中吹风机的内部示意图；
图10为本申请中气流流经第一风扇和第二风扇的立体图；
图11为本申请中气流流经第一风扇和第二风扇的平面图；
图12为本申请实施例五中吹风机的内部结构剖视图；
图13为本申请实施例五中吹风机在一视角下的爆炸图；
图14为本申请实施例五中吹风机在另一视角下的爆炸图；
图15为本申请的实施例五中吹风机的风扇组件和驱动组件的示意图；
图16为图15中部分结构在一视角下的爆炸图；
图17为图15中部分结构在另一视角下的爆炸图；
图18为图16中结构进一步拆分的爆炸图；
图19为图17中结构进一步拆分的爆炸图；
图20为本申请实施例六中吹风机的剖视图；
图21为本申请实施例六中吹风机的内部示意图；
图22为图21中结构的爆炸图。
具体实施方式
在详细解释本申请的任何实施方式之前，应当理解，本申请不限于其应用到以下描述中阐述的或以上附图中所示的结构细节和组件布置。
在本申请中，术语“包括”、“包含”、“具有”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一 个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
在本申请中，术语“和/或”，是一种描述关联对象的关联关系，表示可以存在三种关系。例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“和/或”的关系。
本申请中，术语“连接”、“结合”、“耦合”、“安装”可以是直接连接、结合、耦合或安装，也可以是间接连接、结合、耦合或安装。其中，进行举例示范，直接连接指的是两个零件或组件之间不需设置中间件而连接在一起，间接连接指的是两个零件或组件分别与至少一个中间件连接，这两个零件或组件通过中间件实现连接。此外，“连接”和“耦合”不限于物理或机械连接或耦合，并且可以包括电连接或耦合。
在本申请中，本领域普通技术人员将理解，结合数量或条件使用的相对术语(例如，“约”，“大约”，“基本”等)为包括所述值并且具有上下文所指示的含义。例如，该相对术语至少包括与特定值的测量相关的误差程度，与特定值相关的由制造，组装，使用造成的公差等。这种术语也应被视为公开了由两个端点的绝对值限定的范围。相对术语可指代所指示的值的一定百分比(例如1％，5％，10％或更多)的加或减。未采用相对术语的数值，也应该被揭示为具有公差的特定值。此外，“基本”在表达相对的角度位置关系时(例如，基本平行，基本垂直)，可指代在所指示的角度的基础上加或减一定度数(例如1度，5度，10度或更多)。
在本申请中，本领域普通技术人员将理解，由组件执行的功能可以为由一个组件，多个组件，一个零件，或多个零件执行。同样的，由零件执行的功能也可以由一个零件，一个组件，或多个零件组合来执行。
在本申请中，术语“上”、“下”、“左”、“右”、“前”、“后”等方位词是以附图所示的方位和位置关系来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下”。还应当理解的，上侧、下侧、左侧、右侧、前侧、后侧等方位词不仅代表正方位，也可以理解为侧方位。例如，下方可以包括正下方、左下方、右下方、前下方以及后下方等。
如图1-5所示，本申请提供一种吹风机，该吹风机包括壳体1和风扇组件2，其中，壳体1形成进风口11和吹风口12，气流从进风口11流入，并从吹风口12流出；风扇组件2至少包括第一风扇21和第二风扇22，在吹风机的一种工 作模式下，第一风扇21和第二风扇22旋转方向相反。
通过给吹风机设置第一风扇21和第二风扇22，且第一风扇21和第二风扇22的旋转方向相反，使得第二风扇22可以吸收第一风扇21对气流产生的径向分力，使径向分力变成对第二风扇22的有用功，减少设置导叶造成的效率损失，并且使得气流经过第二风扇22后，气流方向被调整，实现沿轴向运动。此外，本方案使得气流从吹风口12流出的速度得到提高，满足用户对高风速的需求。
为了能尽可能地扩大每个风扇对气流流速的影响，本实施例中，第一风扇21和第二风扇22均能产生从进风口11流动至吹风口12的气流。具体地，第一风扇21和第二风扇22均具有进风侧和出风侧，两个风扇的进风侧方向相同，且均朝向进风口11设置，两个风扇的出风侧方向相同，且均朝向吹风口12设置。在一种实施例中，第一风扇21和第二风扇22同轴设置。同轴设置的第一风扇21和第二风扇22能实现气流速度的叠加。
具体地，吹风机具有第一工作模式，在第一工作模式下，第一风扇21和第二风扇22旋转方向相反。吹风机除具有第一工作模式外，还可具有其他工作模式。在一种实施例中，吹风机可以具有第二工作模式，在第二工作模式下，第一风扇21和第二风扇22以相同方向旋转。在一种实施例中，吹风机可以具有第三工作模式，在第三工作模式下，第一风扇21和第二风扇22中仅有一个旋转，另一个保持静止。第一工作模式可实现风速增加，第二工作模式可实现风量增加，第三工作模式可节约能源。这样，吹风机可以在不同工作模式下切换，满足用户的不同需求。
当然，在其他实施例中，风扇组件2还可以包括第三风扇，在工作时，第三风扇和第一风扇21的转动方向相同或者相反，且工作时，第三风扇能产生从进风口11流动至吹风口12的气流，以进一步增加气流的流速。
在另一实施例中，风扇组件2还可以包括第四风扇，本实施例的第一种实施方式中，四个风扇中，每两个为一组，在所述吹风机的一种工作模式下，同组中的两个风扇的转动方向不同。本实施例的第二种实施方式中，四个风扇中，每两个为一组，在工作时，同组中的两个风扇的转动方向相同，且不同组中的风扇的转动方向不同。
在又一实施例中，风扇组件2还可以包括五个及五个以上数量的风扇。本实施例中的第一种实施方式中，至少两个风扇可定义为一组，同组中的风扇的转动方向不同。本实施例中的第二种实施方式中，至少两个风扇可定义为一组，同组中的风扇的转动方向相同，任意相邻的两组中的风扇的转动方向不同。
关于风扇的驱动原理，为便于表述，接下来以风扇组件2仅包括第一风扇 21和第二风扇22为例展开说明。
如图2至图4所示，在一种实施例中，吹风机还包括第一马达31，第一风扇21和第二风扇22均被第一马达31驱动。同一个马达驱动第一风扇21和第二风扇22的设置使得吹风机的能耗少，且质量轻，成本低。具体地，吹风机包括驱动组件3，驱动组件3包括连接于壳体1的第一马达31和传动组件32，传动组件32包括驱动输入端以及与驱动输入端传动连接的两个驱动输出端，第一马达31的输出端与驱动输入端传动连接，第一风扇21与一个驱动输出端传动连接，第二风扇22与另一个驱动输出端传动连接。
如图2所示，本实施例中，第一马达31位于第一风扇21和第二风扇22的同一侧。换言之，在进风口11至吹风口12方向上，第一风扇21位于第二风扇22和第一马达31之间，或者第二风扇22位于第一风扇21和第一马达31之间。在一种实施例中，第二风扇22位于第一风扇21和第一马达31之间，且第一风扇21靠近进风口11，第一马达31靠近吹风口12。该位置布局使得第一风扇21和第二风扇22之间具距离较小，由第二风扇22流出的气流在到达第一风扇21前的损失较小。
在另一实施例中，第一马达31位于第一风扇21和第二风扇22之间。该设置有助于实现第一风扇21和第二风扇22的安装与传动，结构较为简单，且易生产。
关于传动组件32的结构，需要根据第一马达31、第一风扇21和第二风扇22之间的相对位置进行合理设置。以第二风扇22位于第一马达31和第一风扇21之间的实施例展开说明。本实施例中，传动组件32包括箱体321、主动轴322、第一从动轴324和第二从动轴323，箱体321设于壳体1，主动轴322转动设于箱体321，主动轴322位于箱体321外的一端与第一马达31传动连接。第一从动轴324与箱体321转动连接，且第一从动轴324位于箱体321内的一端与主动轴322位于箱体321内的一端传动连接，第一从动轴324位于箱体321外的一端与第一风扇21连接。第二从动轴323转动设于箱体321，第二从动轴323位于箱体321内的一端与主动轴322位于箱体321内的一端传动连接，第二从动轴323位于箱体321外的一端与第二风扇22连接。
当第一风扇21和第二风扇22同轴设置的实施例中，第二从动轴323具有贯通的避让通道3232，第一从动轴324穿过避让通道3232后与第二风扇22连接。避让通道3232能对第一从动轴324进行避让，使得第一从动轴324可以和第二从动轴323同轴线转动，从而使得吹风机的外径尺寸大幅减小，风速进一步提高。
第一风扇21设有第一固定孔，第一从动轴324为台阶轴，第一从动轴324 穿过第一固定孔后通过第一固定件211固定。其中，第一固定件211包括螺母，第一从动轴324设有螺柱，螺母和螺柱螺接，以将第一风扇21锁紧于螺母和第一从动轴324的台阶之间。
第二风扇22设有第二固定孔，第二从动轴323为台阶轴，第二从动轴323穿过第二固定孔后通过第二固定件221固定。其中，第二固定件221包括螺母，第二从动轴323设有螺柱，螺母和螺柱螺接，以将第二风扇22锁紧于螺母和第二从动轴323的台阶之间。
本实施例中，传动组件32包括箱体321和端盖3211，箱体321设有开口，端盖3211设于箱体321的开口处并和箱体321围设成安装腔，主动齿轮3221、第一从动齿轮3241和第二从动齿轮3231均位于安装腔内，且主动齿轮3221和主动轴322连接，第一从动齿轮3241和第一从动轴324连接，第二从动齿轮3231和第二从动轴323连接，其中，第一从动齿轮3241和第二从动齿轮3231均与主动齿轮3221啮合。
箱体321设有第一安装孔，主动轴322穿设于第一安装孔中，主动轴322和第一安装孔的侧壁之间设有第一轴承33。箱体321设有第二安装孔，端盖3211设有第三安装孔，第二安装孔和第三安装孔同轴设置，其中，第二从动轴323穿设于第三安装孔中，第二从动轴323和第三安装孔的侧壁之间设有第二轴承34；第一从动轴324的一端穿设于第二安装孔，第一从动轴324和第二安装孔的侧壁之间设有第三轴承35；壳体1内设有第四安装孔，第一从动轴324的另一端穿过避让通道3232后穿设于第四安装孔中，且第一从动轴324和第四安装孔的侧壁之间设有第四轴承36。第四轴承36和第三轴承35间隔设置，且分别位于第一从动轴324的两端，对第一从动轴324起到了支撑作用，对第一从动轴324的稳定转动起到保障作用。
为提高对第一从动轴324的固定，防止第一从动轴324出现轴向窜动，本实施例中，驱动组件3还包括第三固定件3242，第一从动轴324的一端穿出第二安装孔后，与第三固定件3242连接，其中，第三固定件3242的外径尺寸大于第三轴承35的内圈内径尺寸，以防止第一从动轴324向后移动。其中，第一从动轴324位于安装腔的部分设有台阶，第一从动齿轮3241的一端和台阶抵接，另一端和第三轴承35的内圈抵接，以防止第一从动轴324向前移动。
壳体1靠近进风口11的一端设有电池包结合部13，用于放置电池包，电池包用为第一马达31供电。
第一风扇21的转速为第一转速n1，第二风扇22的转速为第二转速n2，第一转速n1与第二转速n2的比值n1/n2大于或等于0.2且小于或等于5。在一种实施例中，两个风扇的转速的比值大于或等于0.5且小于或等于1。该设置在实 现气流加速的前提下，能避免第一风扇21和第二风扇22之间出现压力聚集，提高气流流动的稳定性。需要说明的是，这里的转速是指两个风扇运行平稳时的转速。也就是说，当第一风扇21和第二风扇22运行不平稳、转速波动较大时，不对二者的瞬时转速进行比较。这种运行不平稳的状态可能包括：电机刚开始启动而形成的突然加速，用户进行加速、减速操作造成的转速的突然变化，电机正常制动造成的转速降低，电源意外掉电造成的电机非正常制动等。
第一风扇21的功率为第一功率P1，第二风扇22的功率为第二功率P2，第一功率P1与第二功率P2的比值P1/P2大于或等于0.5且小于或等于2。需要说明的是，这里的功率是指驱动该风扇转动的电机对该风扇输出的功率。也就是说，第一功率P1是指驱动第一风扇21转动的电机输出给第一风扇21的功率，第二功率P2是指驱动第二风扇22转动的电机输出给第二风扇22的功率。当第一风扇21和第二风扇22共用同一个电机时，第一功率P1和第二功率P2由同一个电机输出；当第一风扇21和第二风扇22使用两个不同电机时，第一功率P1和第二功率P2由不同电机输出。
第一风扇21和第二风扇22的弦长比值L1/L2大于或等于0.65且小于或等于1。在一种实施例中，第一风扇21和第二风扇22的弦长比值L1/L2为3/4。这里的弦长是指第一风扇21和第二风扇22的叶片的弦长，弦长的定义为本领域的公知常识，在此不做赘述。
本实施例中，第一风扇21的扇叶的出口角和第二风扇22的扇叶的进口角基本相等。该设置使得气流在从第一风扇21流出时的角度与第二风扇22的扇叶的入口角基本相等，对提高风速有巨大帮助。这里描述的扇叶的进口角和出口角也为本领域的公知常识，在此不做赘述。
结合图6-7所示，在一种实施例中，其结构与图2至图5揭示的实施例基本相同，不同之处在于，对第一风扇21和第二风扇22的驱动方式，具体地，吹风机还包括第一马达31和第二马达4，第一风扇21由第一马达31驱动，第二风扇22由第二马达4驱动。上述结构的设置便于对第一风扇21和第二风扇22转动速度进行控制。
关于第一风扇21和第二风扇22的位置，本实施例中，第一风扇21和第二风扇22位于第一马达31和第二马达4之间，减少了因为两个风扇之间的距离造成的风量损失。
如图8所示，所述第一风扇21和第二风扇22分别位于第一马达31和第二马达4的一侧。具体地，在一种实施方式中，在进风口11至吹风口12方向上，依次设置第一风扇21、第一马达31、第二风扇22和第二马达32。在又一种实施方式中，在进风口11至吹风口12方向上，依次设置第一马达31、第一风扇 21、第二马达32和第二风扇22。
如图9所示，第一风扇21和第二风扇22位于第一马达31和第二马达4两侧。具体地，在进风口11至吹风口12方向上，依次设置第一风扇21、第一马达31、第二马达32和第二风扇22。
壳体1靠近进风口11的一端设有电池包结合部13，用于放置电池包，电池包用为第一马达31和第二马达4供电。
图10和图11示出了气流从进风口11流入、并从出风口12流出的过程中流经两个风扇的示意图，第一风扇21和第二风扇22中的一者的入口角等于另一种的出口角。具体地，气流从进风口11以V1方向流向第一风扇21，气流经过旋向为R1的第一风扇21后被调整至V2方向，并以V2方向流向第二风扇22，气流经过旋向为R2的第二风扇22后被调整至V3方向，并以V3方向流向出风口12。其中，R1和R2的旋向相反。
图12至图19示出了吹风机的内部结构的一种新的实施例。如图12至图14所示，壳体1包括依次相连的第一壳体110，第二壳体120和第三壳体130。第一壳体110为吹风机的进风壳体，气流从第一壳体110的开口端流入，流经第二壳体120，从第三壳体130的开口端吹出。风扇组件2和驱动组件3设置在壳体1内，其中，驱动组件3包括第一马达31和传动组件32。
图15示出了风扇组件2和驱动组件3的示意图，图16和图17是图15中的结构在两个视角下的爆炸图，图18和图19是将图17与图18中的结构继续进行拆分的爆炸图。
如图15至图19所示，传动组件32包括主动轴322、第一从动轴324和第二从动轴323，换向组件37设置在第一风扇21和第二风扇22的外侧。主动轴322与第一马达31相连，第一马达31的转动驱动主动轴322转动。主动轴322的转动同时驱动第一风扇21和第二风扇22以相反的旋转转动。主动轴322驱动第一从动轴324转动，第一从动轴324驱动换向组件37运动，使得换向组件37输出一个与主动轴322旋向相反的转动。换向组件37与第二从动轴323相连，将与第一方向相反的旋转方向通过第二从动轴输323输出给第二风扇22。
换向组件37用于将输入的旋转运动转换至相反的转向并输出，如图18所示，换向组件37包括第一齿轮371，第二齿轮372和第三齿轮373。第一齿轮371和第三齿轮373基本平行，第二齿轮372设置在第一齿轮371与第三齿轮373之间，且与第一齿轮371基本垂直。若第一齿轮371以第一方向旋转，旋转运动经过第二齿轮372后，传递至第三齿轮373时，第三齿轮373会以与第一方向相反的方向旋转。在本实施例中，这三个齿轮可以为锥齿轮或斜齿轮。第 三齿轮373与第二从动轴323固定连接或耦合，通过如上对换向组件37的设置实现从换向组件37输入的转向与输出相反的转向。
在本实施例中，主动轴322的一端为马达结合部3223，马达结合部3223伸至第一马达31的内部，主动轴322的另一端为第一驱动部3222。第一从动轴324的一端为第一结合部3242，另一端为第二驱动部3241。第一结合部3242与第一驱动部3222形状配合。第一齿轮371包括第二结合部3711，第二驱动部3241与第二结合部3711形状配合。第二从动轴323包括开口，该开口允许第二驱动部3241从第二风扇22内伸出后，再从第二从动轴323穿过，伸至换向组件37的第一齿轮371。第二驱动部3241与第一齿轮371通过扁位相配合，第二驱动部3241直接驱动第一齿轮371的运动，且二者转动方向一致。第二从动轴323包括第三驱动部3231，第二风扇22包括第三结合部222，第三结合部222与第三驱动部3231形状配合。因此，经过换向组件37的换向作用后，与主动轴322旋向相反的转动被传递至第二风扇22。由于第一风扇21与主动轴322形状配合，第一风扇21与主动轴322的旋向一致，因此，第一风扇21与第二风扇22的旋向相反。
需要说明的是，第一驱动部3222与第一结合部3242、第二驱动部3241与第二结合部3711、第三驱动部3231与第三结合部222之间可以通过扁位、插接槽等进行形状配合，也可以通过螺纹等进行紧固配合，在此不做赘述。
此外，第一风扇21与第二风扇22之间设置有支撑件51，支撑件51包括两个支撑杆511和连接部512。第一驱动部3222和第一结合部3242均有部分伸入连接部512中，连接部512为第一风扇21和第二风扇22的支撑提供了一个支点。主动轴3223和第一风扇21的两个支撑杆511基本设置在一条直线上，且均穿过连接部512的中心。第二壳体120包括开槽121和位于开槽121内的第一开口122，第三壳体130包括伸出部131和伸出部131上的第二开口132。支撑杆511通过开槽121伸入至第一开口122内，第一开口122和第二开口132共同限制了支撑杆511末端的扁位的位置。
在本实施例中，第一驱动部3222和马达结合部3223提供了第一风扇21的两个支撑力。第一壳体110内设置有第一马达壳111，第二壳体120内设置有第二马达壳123，第一马达壳111和第二马达壳123形成容纳空间，该容纳空间给第一马达31提供支撑。第三壳体130内设置有传动壳体133，该传动壳体32支撑传动组件32的一部分，具体地，支撑换向组件37。换向组件37的多个螺钉与传动壳体32上的螺纹孔形成配合。如此设置，风扇组件2和驱动组件3被合理安装在壳体1内，从而保持传动的平稳。
图20至图22为本申请的又一实施例。第一马达31同时驱动第一风扇21 和第二风扇22旋转。第一马达31与主动轴322相连，第一马达31的旋转直接驱动主动轴322旋转。本实施例的驱动组件3也包括换向组件37，换向组件37包括第一齿轮371、第二齿轮372和第三齿轮373。换向组件37的工作原理也与前一实施例类似，在此不再赘述。
与前一实施例相似的是，主动轴322的一端为第一驱动部3222。第一风扇21内包括第四结合部212，第一驱动部3222穿过第一齿轮371、第三齿轮373和第二风扇22，最终与第四结合部212相配合，从而实现主动轴322的转动直接驱动第一风扇21转动。
与前一实施例不同的是，主动轴322还设置有第四驱动部323，第一齿轮371上设置有第四结合部3712。第四驱动部323与第四结合部3712可相互配合，从而使主动轴322的转动驱动第一齿轮371的转动，该转动通过第二齿轮372传递给第三齿轮373，使得第三齿轮373输出与第一齿轮371相反的转动。第三齿轮373上设置有第五驱动部3731，第二风扇22上设置有第五结合部223，第五驱动部3731驱动第五结合部223转动，从而实现第二风扇22输出与主动轴322相反的转速。
以上显示和描述了本申请的基本原理、主要特征和优点。本行业的技术人员应该了解，上述实施例不以任何形式限制本申请，凡采用等同替换或等效变换的方式所获得的技术方案，均落在本申请的保护范围内。

Claims (16)

  1. 一种吹风机，包括：
    壳体(1)，所述壳体(1)形成进风口(11)和吹风口(12)，气流从所述进风口(11)流入，并从所述吹风口(12)流出；
    风扇组件(2)，所述风扇组件(2)至少包括第一风扇(21)和第二风扇(22)；
    其中，
    在所述吹风机的一种工作模式下，所述第一风扇(21)和所述第二风扇(22)的旋转方向相反。
  2. 根据权利要求1所述的吹风机，其中，所述第一风扇(21)和所述第二风扇(22)均能产生从所述进风口(11)流动至所述吹风口(12)的气流。
  3. 根据权利要求1所述的吹风机，还包括第一马达(31)，所述第一风扇(21)和所述第二风扇(22)均被所述第一马达(31)驱动。
  4. 根据权利要求3所述的吹风机，其中，所述第一马达(31)位于所述第一风扇(21)和所述第二风扇(22)的同一侧。
  5. 根据权利要求3所述的吹风机，其中，所述第一马达(31)位于所述第一风扇(21)和所述第二风扇(22)之间。
  6. 根据权利要求1所述的吹风机，还包括第一马达(31)和第二马达(4)，所述第一风扇(21)由所述第一马达(31)驱动，所述第二风扇(22)由所述第二马达(4)驱动。
  7. 根据权利要求6所述的吹风机，其中，所述第一风扇(21)和所述第二风扇(22)位于所述第一马达(31)和所述第二马达(4)之间。
  8. 根据权利要求6所述的吹风机，其中，所述第一风扇(21)和所述第二风扇(22)分别位于所述第一马达(31)和所述第二马达(4)的同一侧。
  9. 根据权利要求6所述的吹风机，其中，所述第一风扇(21)和所述第二风扇(22)位于所述第一马达(31)和所述第二马达(4)的两侧。
  10. 根据权利要求1-9任一项所述的吹风机，其中，所述第一风扇(21)的转速为第一转速n1，所述第二风扇(22)的转速为第二转速n2，所述第一转速n1与所述第二转速n2的比值n1/n2大于或等于0.2且小于或等于5。
  11. 根据权利要求1-9任一项所述的吹风机，其中，所述第一风扇(21)的功率为第一功率P1，所述第二风扇(22)的功率为第二功率P2，所述第一功率P1与所述第二功率P2的比值P1/P2大于或等于0.5且小于或等于2。
  12. 根据权利要求1所述的吹风机，其中，所述第一风扇(21)的弦长为第一弦长L1，所述第二风扇(22)的弦长为第二弦长L2，所述第一弦长L1与所述第二弦长L2的比值L1/L2大于或等于0.65且小于或等于1。
  13. 根据权利要求1所述的吹风机，其中，所述第一风扇(21)的扇叶的出口角和所述第二风扇(22)的扇叶的进口角基本相等。
  14. 根据权利要求3所述的吹风机，还包括主动轴(322)，所述主动轴由所述第一马达驱动旋转，所述第一风扇由所述主动轴驱动、并以与所述主动轴相同的旋转方向旋转。
  15. 根据权利要求14所述的吹风机，还包括换向组件(37)，所述主动轴连接至所述换向组件，所述换向组件驱动第二风扇转动。
  16. 根据权利要求15所述的吹风机，其中，所述换向组件包括第一齿轮(371)、第二齿轮(372)和第三齿轮(373)，所述第二齿轮位于所述第一齿轮和所述第三齿轮之间。
PCT/CN2023/137337 2022-12-09 2023-12-08 吹风机 WO2024120508A1 (zh)

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