WO2022028384A1 - 吹风机 - Google Patents

吹风机 Download PDF

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Publication number
WO2022028384A1
WO2022028384A1 PCT/CN2021/110188 CN2021110188W WO2022028384A1 WO 2022028384 A1 WO2022028384 A1 WO 2022028384A1 CN 2021110188 W CN2021110188 W CN 2021110188W WO 2022028384 A1 WO2022028384 A1 WO 2022028384A1
Authority
WO
WIPO (PCT)
Prior art keywords
air inlet
equal
hair dryer
fan
outer air
Prior art date
Application number
PCT/CN2021/110188
Other languages
English (en)
French (fr)
Inventor
山冈敏成
李经纬
郭建朋
聂柱生
张建
Original Assignee
南京德朔实业有限公司
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
Priority claimed from CN202110836473.5A external-priority patent/CN114059482B/zh
Application filed by 南京德朔实业有限公司 filed Critical 南京德朔实业有限公司
Priority to EP21853482.4A priority Critical patent/EP4162836B1/en
Publication of WO2022028384A1 publication Critical patent/WO2022028384A1/zh
Priority to US18/097,045 priority patent/US12092130B2/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • 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
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0673—Battery powered
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts

Definitions

  • the present application relates to a garden tool, such as a hair dryer.
  • a hair dryer can be used to clean the ground.
  • the air inlet performance of its air inlet limits the blowing efficiency of the blower.
  • To improve the air inlet performance it is also necessary to consider the safety of the outlet fan, the strength of the whole machine, and how to avoid increasing the weight of the whole machine. Therefore, , How to improve the air intake performance of the hair dryer is a difficult problem to solve.
  • the present application provides a hair dryer, which can improve the blowing efficiency, reduce the weight of the whole machine, and is convenient for users to hold.
  • An embodiment provides a hair dryer, including: a motor; a fan driven by the motor to rotate around a first axis; a power supply device for supplying power to the motor; a housing assembly for accommodating the motor; The inner air inlet; the outer air duct assembly surrounds the inner air duct; wherein, the outer air duct assembly includes an outer air duct and an air hood, the outer air duct is arranged on the front side of the air hood, and the end of the outer air duct away from the air hood forms an outer air outlet, The hood forms an outer air inlet, and the outer air inlet has a front end portion and a rear end portion along the first axis direction; and the inner air inlet port is located between the front end portion and the rear end portion along the first axis direction.
  • the distance between the front end of the outer air inlet and the inner air inlet is greater than or equal to 3 mm.
  • the distance between the front end of the outer air inlet and the inner air inlet is greater than or equal to 40 mm and less than or equal to 100 mm.
  • the ratio of the effective air intake area of the outer air inlet to the cross-sectional area of the inner air inlet perpendicular to the first axis is greater than or equal to 1.8.
  • the hood includes a plurality of ribs, the plurality of ribs are sequentially arranged in a circumferential direction around the first axis, and an outer air inlet is formed between two adjacent ribs.
  • the interval between two adjacent ribs is set to be greater than or equal to 8 mm and less than or equal to 10 mm.
  • a part of the hood is arranged on the front side of the inner air inlet, and the other part is arranged on the rear side of the inner air inlet, so that the airflow entering from the hood can flow inward from the front and rear sides of the inner air inlet Inlet.
  • the total area of the outer air inlets is greater than 20000 mm 2 .
  • the hood includes a first rib, an annular portion, a second rib and a central portion arranged in sequence from front to rear, the annular portion connects the first rib and the second rib, and the second rib connects the annular portion and the central portion, The distance between the second rib and the first axis gradually decreases along the path connecting the annular portion and the central portion.
  • the dimension of the outer air inlet along the direction of the first axis is greater than or equal to 100 millimeters and less than or equal to 300 millimeters.
  • the fan includes fan blades, and the number of the fan blades is set to 9 pieces.
  • the fan includes fan blades, the number of fan blades is set to be greater than or equal to 8 and less than or equal to 12, and the outer diameter of the fan blades is set to be greater than 78 mm and less than 130 mm.
  • the outer diameter of the fan blade is set to be greater than 78mm and less than 98mm.
  • the inlet angle of the fan blade is set to be greater than or equal to 5° and less than or equal to 20°.
  • the ratio of the outer diameter of the blades to the diameter of the hub of the fan is greater than or equal to 0.41 and less than or equal to 0.5.
  • FIG. 1 is a perspective view of a hair dryer of an embodiment
  • Fig. 2 is a plan view of the hair dryer in Fig. 1;
  • Figure 3 is a cross-sectional view of the hair dryer in Figure 1;
  • FIG. 4 is a perspective view of the hair dryer in FIG. 1 with the battery pack removed;
  • FIG. 5 is a sectional view of the hair dryer in FIG. 1 with the battery pack removed;
  • Fig. 6 is the internal structure schematic diagram of the hair dryer in Fig. 1;
  • FIG. 7 is an enlarged view of a part of the structure of the hair dryer in FIG. 6;
  • FIG. 8 is a perspective view of a fan and a motor of the hair dryer in FIG. 1;
  • Figure 9 is a plan view of the structure shown in Figure 8.
  • Figure 10 is a perspective view of the structure shown in Figure 8 from another angle;
  • Figure 11 is another cross-sectional view of the hair dryer in Figure 1;
  • FIG. 12 is a perspective view of the fan of FIG. 8 .
  • the hair dryer 100 includes a motor 110 , a fan 120 , a power supply device 121 , and a housing assembly 130 .
  • the housing assembly 130 includes an outer air duct assembly 130 a and an inner air duct 150
  • the outer air duct assembly 130 a includes an outer air duct 140 and an air hood 133 .
  • the fan 120 is driven to rotate by the motor 110
  • the power supply device 121 is used to supply power to the motor 110 .
  • the outer air duct assembly 130a provides an outer air inlet 131 and an outer air outlet 132 .
  • the inner air duct 150 is used to support the motor 110 , and the inner air duct 150 forms an inner air inlet 151 .
  • the outer air duct assembly 130a surrounds the inner air duct 150, the outer air duct 140 is arranged on the front side of the air hood 133, a part of the inner air duct 150 is arranged in the outer air duct 140, and a part is arranged in the air hood 133, and the outer air duct 140 provides an outlet
  • the tuyere 132 and the hood 133 provide the outer air inlet 131 .
  • the air hood 133 provides the outer air inlet 131
  • the air hood 133 surrounds one end of the inner air duct 150 , so that part of the airflow entering from the air hood 133 can flow from the rear end of the inner air duct 150 to the inner air inlet 151 .
  • the motor 110 is set to rotate around the first axis 101 , and the outer air inlet 131 has a front end portion 131 a and a rear end portion 131 b in the direction along the first axis 101 .
  • the inner air inlet 151 is disposed between the front end portion 131a and the rear end portion 131b. In this way, the air flow can enter the air hood 133 from the front side and the rear side of the inner air inlet 151 respectively, and then enter the inner air inlet 151 .
  • the air cover 133 surrounds the inner air inlet 151 .
  • a part of the hood 133 is provided on the front side of the inner air inlet 151
  • the other part of the hood 133 is provided on the rear side of the inner air inlet 151 .
  • a part of the air hood 133 is arranged on the upper side of the inner air inlet 151
  • the other part of the air hood 133 is arranged on the lower side of the inner air inlet 151 .
  • a part of the air hood 133 is arranged on the left side of the inner air inlet 151
  • the other part of the air hood 133 is arranged on the right side of the inner air inlet 151 . That is to say, the front, rear, upper, lower, left and right sides of the inner air inlet 151 are all distributed with the hoods 133 .
  • the hood 133 forms an outer air inlet 131 , and the outer air inlet 131 surrounds the inner air inlet 151 .
  • a part of the outer air inlet 131 is arranged on the front side of the inner air inlet 151
  • the other part of the outer air inlet 131 is arranged on the rear side of the inner air inlet 151 .
  • a part of the outer air inlet 131 is arranged on the upper side of the inner air inlet 151
  • the other part of the outer air inlet 131 is arranged on the lower side of the inner air inlet 151 .
  • the hood 133 includes a plurality of ribs 1331, and the plurality of ribs 1331 are sequentially arranged in the circumferential direction around the first axis.
  • An outer air inlet 131 is formed between two adjacent ribs 1331 .
  • the interval between adjacent ribs 1331 is set to be greater than or equal to 8 mm and less than or equal to 10 mm, thereby increasing the effective air intake area and improving the air intake efficiency.
  • the total area of the outer air inlet 131 is greater than 20000 mm 2 .
  • the outer air duct assembly 130 a further includes a handle portion 134 .
  • the handle portion 134 is connected to the front end portion 131 a of the outer air inlet 131 , and the handle portion 134 can be in contact with the upper side of the outer air inlet 131 .
  • the handle portion 134 may also be spaced apart from the outer air inlet 131, thereby increasing the air inlet area.
  • the housing assembly 130 further includes an electrical connection portion 135, and the electrical connection portion 135 is used for detachably connecting a power supply device, and the power supply device may be a battery pack.
  • the housing assembly 130 further includes a bracket 136 disposed on the lower side of the outer air inlet 131.
  • the bracket 136 forms a support plane.
  • the center of gravity of the blower 100 is within the plane where the support plane is located.
  • the projection is in the support plane so that the blower 100 can be placed smoothly on the plane by the bracket 136 .
  • the projection of the center of gravity of the whole blower 100 on the plane where the support plane is located is within the projection of the outer air inlet 131 on the plane.
  • the ratio of the effective air intake area a1 of the outer air inlet 131 to the cross-sectional area a2 of the inner air inlet 151 perpendicular to the first axis 101 is greater than or equal to 1.8.
  • the ratio of the effective air intake area a1 of the outer air inlet 131 to the cross-sectional area a3 of the inner air duct 150 in a plane passing through the fan 120 and perpendicular to the first axis 101 is greater than or equal to 2 and less than or equal to 5, thereby improving the air intake of the blower 100 .
  • the ratio of the effective air intake area a1 of the outer air inlet 131 to the cross-sectional area a3 of the inner air duct 150 in a plane passing through the fan 120 and perpendicular to the first axis 101 is greater than or equal to 3 and less than or equal to 4.5, and the outer air inlet 131 and The distance between the inner air inlets 151 is relatively increased, thereby reducing the wind speed at the outer air inlets 131 and reducing the wind resistance, so as to improve the air inlet efficiency.
  • the distance L1 between the front end 131 a of the outer air inlet 131 and the inner air inlet 151 in the axial direction of the first axis 101 is greater than or equal to 3 mm, so as to reduce the noise generated during the operation of the blower 100 .
  • the distance L1 between the front end 131a of the outer air inlet 131 and the inner air inlet 151 in the axial direction of the first axis is greater than or equal to 40 mm and less than or equal to 100 mm.
  • the hood 133 includes a first rib 133a, an annular portion 133b, a second rib 133c and a central portion 133d which are sequentially arranged from front to rear, and the annular portion 133b connects the first rib 133a and the second rib. 133c.
  • the annular portion 133b surrounds the first axis 101
  • the second rib 133c and the center portion 133d are disposed on the rear side of the inner air inlet 151
  • the center portion 133d is disposed on the first axis 101 .
  • the second rib 133c connects the annular portion 133b and the central portion 133d, and the distance between the second rib 133c and the first axis 101 gradually decreases along a path connecting the annular portion 133b and the central portion 133d. That is, the second rib 133a gradually contracts from the annular portion 133b toward the center portion 133d.
  • the electrical connection portion 135 includes a slider 1351 , an elastic element 1352 , and a positioning groove 1353 .
  • the slider 1351 has a first positioning member 1354 and a second positioning member 1355 .
  • the elastic element 1352 abuts against the slider 1351 .
  • the sliding block 1351 is disposed in the positioning groove 1353 , and the first positioning member 1354 and the second positioning member 1355 are set to abut against the positioning groove 1353 , so that the sliding block 1351 can slide in the positioning groove 1353 .
  • the electrical connection part 135 includes a connection end and a pole piece disposed at the connection end. When the battery pack is connected to the electrical connection part 135 , the battery pack abuts against the connection end and contacts the pole piece.
  • the connecting end of the slider 1351 is partially exposed.
  • the slider 1351 surrounds the pole piece, so that the user cannot directly contact the pole piece, preventing the user from touching the pole piece and causing electric shock.
  • the elastic element 1352 is connected and abutted with the slider 1351.
  • the slider 1351 slides from the outside of the connection end to the inside of the positioning groove 1353, and the first positioning member 1354 and the second positioning member 1355 support the slider 1351 in the position.
  • the positioning groove 1353 slides, the slider 1351 is displaced so that the pole piece is exposed, so that the battery pack is connected to the pole piece to achieve electrical connection.
  • the first positioning member 1354 and the second positioning member 1355 are spaced apart in the height direction, so that the positioning groove 1353 can have a certain height, thereby preventing dust from blocking the positioning groove 1353, thereby reducing the risk of the slider 1351 being stuck due to dust.
  • the arrangement of the first positioning member 1354 and the second positioning member 1355 can also reduce the shaking of the slider 1351 in the positioning groove 1353 .
  • the electrical connection part 135 also includes a locking piece 1356 and a release button 1357.
  • the locking piece 1356 abuts against the front end 131a of the slider 1351, and the elastic element 1352 drives the slider 1351 to move forward. That is, the slider 1351 is prevented from moving to the outside of the positioning groove 1353 .
  • the locking member 1356 is connected with a second elastic member 1358. When the user pushes the release button 1357 to compress the second elastic member 1358, the locking member 1356 is driven to produce displacement, and the movement of the slider 1351 is no longer restricted. The elastic member pushes the slider 1351 to drive The battery pack is pulled out from the electrical connection portion 135 .
  • the fan 120 rotates at a high speed, which is likely to generate static electricity. Static electricity not only easily breaks down the electronic components of the hair dryer 100 , causing damage to the hair dryer 100 , but also easily generates electric sparks to strike the user. In order to reduce the static electricity generated by the fan 120 , it is necessary to reduce the number of fan blades. However, if the number of fan blades is directly reduced, the air volume generated by the fan 120 will be insufficient, thereby reducing the performance of the blower 100 .
  • the fan 120 includes a fan blade 122 , the outer diameter L2 of the fan blade 122 is set to be greater than 78 mm and less than 130 mm, and the minimum distance between the two fan blades 122 is set to be greater than or equal to 8 mm. And less than or equal to 12mm, here, if the spacing of the fan blades 122 is too low, due to the friction of the airflow on the fan blades, the static electricity generated when the fan rotates will increase. reduce.
  • the inlet angle ⁇ 1 of the fan blade is set to be greater than or equal to 5° and less than or equal to 20°.
  • the inlet angle of the fan blade 122 refers to the angle between the tangent of the front section of the root portion 122a of the fan blade 122 and the axis of the fan 120 (the root portion 122a of the fan blade 122).
  • the front section of the fan blade 122 refers to the part of the root 122a of the fan blade 122 that cuts the air first).
  • the number of the fan blades 122 is set to be greater than or equal to 8 and less than or equal to 12 pieces.
  • the twist angle ⁇ 2 of the fan blade 122 is set to be greater than or equal to 45° and less than or equal to 54°. We found that if the twist angle of the fan blade 122 is too high, the wind force generated in the axial direction will be small, and the twist angle of the fan blade 122 If the setting is too low, the airflow will be scattered from the radial direction of the fan blades 122, so it is necessary to set an appropriate twist angle of the fan blades 122 to increase the air output of the fan.
  • the diameter L3 of the hub 120a of the fan 120 is set to be greater than or equal to 35 mm and less than or equal to 45 mm, and the length L4 of the root 122a of the fan blade 122 is set to be greater than or equal to 18 mm and less than or equal to 29 mm.
  • the edge length L5 of the fan blade 122 is set to be greater than or equal to 8.5 mm and less than or equal to 14.5 mm.
  • the hub diameter ratio is set to be greater than or equal to 0.41 and less than or equal to 0.5, and the reduction The inlet angle of the fan blade 122 and the increase of the chord length of the root 122a of the fan blade 122 can effectively improve the kinetic energy efficiency of the fan 120 , and increase the air volume generated by the fan 120 under the same power.
  • the hub diameter ratio is the ratio of the outer diameter L2 of the fan blade 122 to the diameter L3 of the hub 120a.
  • the outer diameter L2 of the fan blade 122 is set to be larger than 78 mm and smaller than 98 mm, which can better improve the kinetic energy efficiency.
  • the outer diameter of the fan blades 122 is set to be greater than 82 mm and less than 94 mm.
  • the angle formed by the connecting line between the adjacent end points of the two adjacent fan blades 122 and the axial center is set to be greater than equal to 10 degrees and less than or equal to 20 degrees.
  • the included angle formed by the connecting line between the adjacent end points of the two adjacent fan blades 122 and the shaft center is set to be greater than or equal to 12 degrees and less than or equal to 18 degrees.
  • the inlet angle ⁇ 1 of the fan blade 122 is set to be 5° or more and 15° or less.
  • the number of the fan blades 122 is set to be greater than or equal to 8 and less than or equal to 9.
  • the number of the fan blades 122 is set to 9 pieces.
  • the diameter L3 of the hub 120a of the fan 120 is set to be greater than or equal to 38 mm and less than or equal to 42 mm, and the length L4 of the root 122a of the fan blade 122 is set to be greater than or equal to 20 mm and less than or equal to 26 mm.
  • the edge length L5 of the fan blade is set to be greater than or equal to 10 mm and less than or equal to 13 mm.
  • the fan 120 proposed in this embodiment can reduce the frequency of cutting air, and reduce the noise generated by the rotation of the fan 120.
  • the ratio of the diameter to the diameter of the hub 120a) is set to be greater than or equal to 0.43 and less than or equal to 0.49, and reducing the inlet angle of the fan blade and increasing the chord length of the root 122a of the fan blade 122 can effectively improve the kinetic energy efficiency of the fan 120, the same power down, the air volume that can be generated by the fan 120 is increased.
  • a guide cone 152 for fixing the motor 110 is formed inside the inner air duct 150 , the motor 110 is arranged inside the guide cone 152 , and in the axial direction of the first axis 101 , the diameter of the hub of the fan 120 and the guide
  • the diameter of the end face of the flow cone 152 is the same or the difference is not greater than 10% of the diameter of the hub of the fan 120, so that in the axial direction of the first axis 101, the projection of the hub of the fan 120 and the projection of the guide cone 152 basically overlap, so that the hub of the fan 120 is substantially overlapped.
  • the guide cone 152 has no clearance in the radial direction of the first axis 101 .
  • the fan 120 rotates to generate high-speed airflow, the air pressure near the fan 120 is low, and the cooling airflow flows from the front end 131a of the guide cone 152 to the rear end 131b of the guide cone 152, that is, near the fan 120, while the fan
  • the size of the hub 120 and the guide cone 152 are similar to reduce the gap between the two, so that the air flow generated by the rotation of the fan 120 flows into the guide cone 152 to reduce the air flow inside the guide cone 152, so as to prevent the airflow inside the guide cone 152 from being turbulent.
  • the heat dissipation efficiency of the motor 110 can be effectively improved.
  • the hair dryer 100 further includes a control unit 170 and an operation assembly 160 .
  • the fan 120 is driven and rotated by the motor 110
  • the power supply device 121 is used to supply power to the motor 110
  • the control unit 170 controls the operation of the motor 110
  • the operating assembly 160 is communicatively connected with the control unit 170 .
  • the operating assembly 160 includes a trigger 161 for the user to control the opening and rotational speed of the motor 110 .
  • the operating assembly 160 also includes a speed control knob 162, which is configured to be operated to perform the first action and the second action.
  • the hair dryer 100 further includes a control circuit, and the power supply device 121, the control unit 170 and the operation component 160 are electrically connected through the control circuit.
  • the first action is to rotate the speed control knob 162 along the first direction or the second direction
  • the second action is to push the speed control knob 162 .
  • the inner air duct 150 is used to support the motor 110 .
  • the trigger 161 is arranged on the upper side of the handle portion 134
  • the speed control knob 162 is arranged on the lower side of the handle portion 134 , so that when the user holds the handle portion 134 , the holding hand can touch and control the trigger 161 and the speed regulation at the same time.
  • the knob 162 can be pressed, and the trigger 161 can be pressed, and the first action and the second action can be performed on the speed control knob 162 .
  • the user can press the trigger 161 and simultaneously press the speed control knob 162, or press the trigger 161 and rotate the speed control knob 162 at the same time, or simultaneously press the trigger 161 and press and rotate the speed control knob. 162.
  • a position signal is sent to the control unit 170 to adjust and lock the rotational speed of the motor 110 .
  • the control unit 170 is configured as an integrated PCB board, and when the trigger 161 is pressed by the user and the displacement changes, it sends the first type of signal to the control unit 170, and the control unit 170 controls the rotation speed of the motor 110 according to the information of the first type of signal.
  • the resistance value of the control circuit is changed by the displaced trigger 161, thereby sending a corresponding voltage signal to the control unit 170, and then adjusting the duty cycle, thereby controlling the rotational speed of the motor 110.
  • the first type of signal is a voltage. Signal.
  • the control unit 170 is arranged to control the motor 110 to turn on only when the first type of signal is received.
  • the control unit 170 controls the motor 110 to turn on.
  • the control unit 170 controls the motor 110 to stop rotating according to the change of the first type of signal.
  • the first action of the speed control knob 162 is operated, that is, when the speed control knob 162 is rotated, the second type of signal is sent to the control unit 170, and the control unit 170 locks the minimum rotation speed of the motor 110 according to the second type of signal.
  • the second type of signal is a phase signal.
  • the control unit 170 adjusts the duty cycle of the control circuit according to the change of the phase signal, so that the speed control process is smoother and more reliable.
  • the rotation speed of the fan 120 After the user locks the minimum rotation speed of the fan 120 through the speed control knob 162 , when the user presses the trigger 161 and the control unit 170 receives the first type signal, the rotation speed of the fan 120 will be increased accordingly, and when the user releases the trigger 161 Afterwards, limited by the rotational speed signal output by the speed control knob 162 , the rotational speed of the fan 120 can be reduced to the minimum rotational speed locked by the speed control knob 162 . When the speed control knob 162 is rotated to a certain position, the rotation speed of the fan 120 will not be lower than the rotation speed corresponding to the position.
  • the control unit 170 increases the minimum locked rotational speed of the motor 110 . That is, when the speed regulating knob 162 is rotated relative to the first direction by 30 degrees, the control unit 170 controls the minimum locked rotational speed of the motor 110 to be the first rotational speed. When the speed control knob 162 is rotated by 60 degrees, the control unit 170 controls the minimum locked rotational speed of the motor 110 to be the second rotational speed, and the second rotational speed is greater than the first rotational speed.
  • the control unit 170 may control the motor 110 to rotate at a rotational speed greater than the first rotational speed according to the first type of signal output by the trigger 161.
  • the control unit 170 controls the motor 110 to run at the first rotation speed.
  • the speed control knob 162 has a rotation position corresponding to the maximum locking speed, that is, when the speed control knob 162 is rotated in the first direction to reach or exceed a certain angle, the control unit 170 receives the second type signal to control the minimum lock speed of the motor 110 to be at the highest numerical value. At this time, when the speed regulating knob 162 continues to rotate in the first direction at the rotating position, the control unit 170 does not increase the minimum locking speed of the motor 110 .
  • the speed control knob 162 When the speed control knob 162 is rotated to a certain angle toward the first direction, when the speed control knob 162 is operated to rotate in a second direction opposite to the first direction, the second type of signal is sent to the control unit 170, and the control unit 170 controls The minimum locked rotational speed of the motor 110 is controlled to decrease according to the second type of signal, and the minimum locked rotational speed of the motor 110 can be reduced to zero when the speed regulating knob 162 is continuously rotated in the second direction.
  • the second type of signal sent by the speed control knob 162 includes a first pulse signal and a second pulse signal.
  • the control unit 170 determines the rotation direction of the speed control knob 162 by identifying the relative positions of the first pulse signal and the second pulse signal, thereby identifying the user the speed-up or speed-down command.
  • the control unit 170 identifies the rotation angle of the speed control knob 162 by identifying the phase difference between the first pulse signal and the second pulse signal, so as to adjust the minimum locked rotational speed of the motor 110 accordingly.
  • the induction element there is an induction element under the speed control knob 162.
  • the speed control knob 162 When the speed control knob 162 is operated to perform the second action, that is, when the speed control knob 162 is pressed, the induction element senses the action of the speed control knob 162 and sends a third type of signal to the The control unit 170, when the control unit 170 receives the third type signal, controls the motor 110 to run at the set maximum speed, when the motor 110 runs at the maximum speed, the fan 120 is driven to rotate at the maximum speed, and the control unit 170 locks the fan 120 at maximum rotation.
  • the maximum value of the minimum locked rotational speed of the motor 110 is set to be smaller than the maximum rotational speed of the motor 110, that is, when the user can only operate the speed control knob 162 to perform the second action, the motor 110 can be driven to run at the maximum rotational speed, and by rotating The speed control knob 162 cannot adjust the motor 110 to the maximum speed.
  • the control unit 170 receives the third type signal to lock the motor 110 to the maximum rotational speed, and at this time, releasing the trigger 161 will not stop the motor 110 .
  • the operation assembly 160 includes a trigger 161 and a speed control knob 162.
  • the control unit 170 controls the motor 110 to start, and the displacement and rotational speed of the trigger 161 being pressed proportional.
  • the speed regulating knob 162 is not operated, the trigger 161 is released, and the control unit 170 controls the motor 110 to stop.
  • the specific control principle is similar to that of the above-mentioned embodiment, and will not be described in detail here.
  • the speed adjusting knob 162 is set to the rotational speed that can be adjusted by locking the current trigger 161 by operation.
  • the speed control knob 162 is operated to rotate in the first direction by a certain angle to activate the locking of the rotational speed of the motor 110 , and the angle can be one rotation of the speed control knob 162
  • One unit or two rotation units, such as the speed control knob 162 being rotated by 15 degrees is one rotational unit of the speed control knob 162 .
  • the speed control knob 162 When the user presses the trigger 161 to control the motor 110 to output at the first rotational speed, and then rotates the speed control knob 162 to a predetermined angle in the first direction, at this time the speed control knob 162 generates a second type of signal to the control unit 170 , and the control unit 170 The rotational speed of the motor 110 is controlled to maintain the first rotational speed according to the second type of signal. After the rotation speed of the motor 110 is locked by rotating the speed regulating knob 162, the trigger 161 is released, and the control unit 170 controls the motor 110 to still rotate at the first rotation speed.
  • the speed control knob 162 After the speed of the motor 110 is locked by rotating the speed control knob 162, the speed control knob 162 is rotated in the first direction, and the speed control button sends the second type of signal to the control unit 170, and the control unit 170 provides the over-adjustment duty cycle to adjust the motor 110.
  • the rotational speed in this way, allows the motor 110 to be adjusted to a predetermined maximum locked rotational speed.
  • the control unit 170 is provided with an algorithm, so that when the rotational speed of the motor 110 reaches the preset maximum value, continuing to rotate the speed control knob 162 in the first direction will not increase the rotational speed of the motor 110 any more. At this time, rotate the speed control knob 162 in the second direction to generate a second type signal and send it to the control unit 170.
  • the control unit 170 controls the motor 110 according to the rotation of the speed control knob 162 in the second direction according to the information of the second type signal.
  • the angle corresponds to a reduction in speed until the speed control knob 162 is continued to be rotated in the second direction, so that the speed of the motor 110 is reduced to zero.
  • the third type of signal is sent to the control unit 170 , and the control unit 170 adjusts the motor 110 to increase the rotational speed, so that the fan is at the set maximum rotational speed, which is greater than that by rotating the speed control knob 162 And can lock the highest value of the speed.
  • the speed control knob 162 is rotated in the first direction by at least one rotation unit, and the speed control knob 162 sends the second type signal to the control unit 170, so that the control unit 170 locks the motor 110 at the maximum speed.
  • the control unit 170 is configured to control the motor 110 to exit the locked state and end the maximum rotational speed state of the motor 110 only when receiving the second type of signal generated by the rotation of the speed control knob 162 in the second direction.
  • the control unit 170 is provided in the handle portion 134 .
  • the hair dryer 100 further includes a heat sink, the heat sink is disposed between the control unit 170 and the outer air inlet 131, the heat sink and the control unit 170 are at least partially in contact, and the heat sink is close to the outer air inlet 131 and at least partially exposed to the outer air inlet 131.
  • the heat dissipation member is used to guide the heat generated by the control unit 170 , and the air flow generated by the air inlet portion takes away the heat absorbed by the heat dissipation member, thereby improving the heat dissipation effect on the control unit 170 .

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Abstract

一种吹风机（100），包括：马达（110）；风扇（120），被马达（110）驱动绕第一轴线（101）转动；电源装置（121），用于给马达（110）供电；壳体组件（130），容纳马达（110）；壳体组件（130）包括：内风管（150），形成有内进风口（151）；外风管组件（130a），包围内风管（150）；其中，外风管组件（130a）包括外风管（140）和风罩（133），外风管（140）设置在风罩（133）的前侧，外风管（140）远离风罩（133）的一端形成外出风口（132），风罩（133）形成外进风口（131），外进风口（131）在沿第一轴线（101）方向上具有前端部（131a）和后端部（131b）；在沿第一轴线（101）方向上，内进风口（151）位于前端部（131a）和后端部（131b）之间。

Description

吹风机
本申请要求申请日为2020年8月3日、申请号为202010764709.4，申请日为2021年7月23日、申请号为202110836478.8，以及申请日为2021年7月23日、申请号为202110836473.5的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种花园类工具，例如涉及一种吹风机。
背景技术
吹风机作为一种花园类工具，可以用于清扫地面。其进风部的进风性能限制着吹风机的吹风效率，若要提升进风性能，还需要考虑到出风机的使用安全性、整机的强度等问题，且如何实现不增加整机重量，因此，如何提升吹风机的进风性能是个较难解决的问题。
发明内容
本申请提供一种吹风机，可以提升其吹风效率，并且降低整机重量，方便用户握持。
一实施例提供一种吹风机，包括：马达；风扇，被马达驱动绕第一轴线转动；电源装置，用于给马达供电；壳体组件，容纳马达；壳体组件包括：内风管，形成有内进风口；外风管组件，包围内风管；其中，外风管组件包括外风管和风罩，外风管设置在风罩的前侧，外风管远离风罩的一端形成外出风口，风罩形成外进风口，外进风口在沿第一轴线方向上具有前端部和后端部；在沿第一轴线方向上，内进风口位于前端部和后端部之间。
在一些实施例中，在沿第一轴线方向上，外进风口的前端部与内进风口之间的距离大于等于3mm。
在一些实施例中，在沿第一轴线方向上，外进风口的前端部与内进风口的距离大于等于40mm且小于或等于100mm。
在一些实施例中，外进风口的有效进风面积与内进风口垂直于第一轴线的横截面面积的比值大于等于1.8。
在一些实施例中，风罩包括多个肋条，多个肋条在围绕第一轴线的圆周方向上依次排布，相邻的两个肋条之间形成外进风口。
在一些实施例中，相邻的两个肋条的间隔被设置大于等于8mm且小于等于10mm。
在一些实施例中，风罩一部分设置在内进风口的前侧，另一部分设置在内进风口的后侧， 从而使得从风罩进入的气流能从内进风口的前侧和后侧流向内进风口。
在一些实施例中，外进风口总面积大于20000mm 2。
在一些实施例中，风罩包括从前到后依次设置的第一肋条、环形部、第二肋条以及中心部，环形部连接第一肋条和第二肋条，第二肋条连接环形部和中心部，第二肋条在沿着连接环形部和中心部的路径上与第一轴线之间的距离逐渐变小。
在一些实施例中，外进风口在沿第一轴线方向上的尺寸大于等于且小于等于100毫米且小于等于300毫米。
在一些实施例中，风扇包括风叶，风叶的数量被设置为9片。
在一些实施例中，风扇包括风叶，风叶的数量被设置大于等于8片且小于等于12片，风叶的外径被设置大于78mm且小于130mm。
在一些实施例中，风叶的外径被设置大于78mm且小于98mm。
在一些实施例中，风叶的入口角被设置大于等于5°且小于等于20°。
在一些实施例中，风叶的外径与风扇的轮毂的直径的比值大于或等于0.41且小于或等于0.5。
附图说明
图1是一实施例的吹风机立体图；
图2是图1中吹风机的平面图；
图3是图1中吹风机的剖视图；
图4是图1中吹风机去除电池包的立体图；
图5是图1中吹风机去除电池包的剖视图；
图6是图1中吹风机的内部结构示意图；
图7是图6中吹风机的部分结构的放大图；
图8是图1中吹风机的风扇以及电机的立体图；
图9是图8所示结构的平面图；
图10是图8所示结构的另一角度的立体图；
图11是图1中吹风机的另一剖视图；
图12是图8中风扇的立体图。
具体实施方式
在本申请的一种实施方式中，参照图1到图3，吹风机100包括马达110、风扇120、电源装置121、壳体组件130。壳体组件130包括外风管组件130a以及内风管150，外风管组件130a包括外风管140和风罩133。风扇120被马达110驱动转动，电源装置121用于给马达110供电。外风管组件130a提供外进风口131和外出风口132。内风管150用于支撑马达110，内风管150形成内进风口151。外风管组件130a包围内风管150，外风管140设置在风罩133的前侧，内风管150一部分设置在外风管140内，一部分设置在风罩133内，外风管140提供外出风口132，风罩133提供外进风口131。风罩133提供外进风口131，且风罩133包围内风管150的一端，使得从风罩133进入的部分气流能从内风管150的后端部流向内进风口151。
可选的，设定马达110绕第一轴线101转动，外进风口131在沿着第一轴线101的方向上具有前端部131a和后端部131b。在沿第一轴线101方向上，内进风口151设置于前端部131a和后端部131b之间。这样，气流可以分别从内进风口151的前侧以及后侧分别进入风罩133内，然后再进入内进风口151。
风罩133包围内进风口151。在前后方向上，风罩133一部分设置在内进风口151的前侧，风罩133另一部分设置在内进风口151的后侧。在上下方向上，风罩133的一部分设置在内进风口151的上侧，风罩133另一部分设置在内进风口151的下侧。在左右方向上，风罩133的一部分设置在内进风口151的左侧，风罩133另一部分设置在内进风口151的右侧。也即是说，内进风口151的前、后、上、下、左、右均分布有风罩133。
风罩133形成外进风口131，外进风口131包围内进风口151。在前后方向上，外进风口131一部分设置在内进风口151的前侧，外进风口131另一部分设置在内进风口151的后侧。在上下方向上，外进风口131的一部分设置在内进风口151的上侧，外进风口131另一部分设置在内进风口151的下侧。在左右方向上，外进风口131的一部分设置在内进风口151的左侧，外进风口131另一部分设置在内进风口151的右侧。也即是说，内进风口151的前、后、上、下、左、右均分布有外进风口131。从而提升外进风口131的进风面积，且实现吹风机100的多个方向上的进风，提升进风效率，且降低风阻。风罩133包括多个肋条1331，多个肋条1331在围绕第一轴线的圆周方向上依次排布。相邻的两个肋条1331之间形成外进风口131。相邻肋条1331的间隔被设置大于等于8mm且小于等于10mm，从而提升有效进风面积，提升进风效率。本实施方式中，外进风口131总面积大于20000mm 2。
参照图1到图4，外风管组件130a还包括把手部134，把手部134连接于外进风口131的前端部131a，把手部134可与外进风口131的上侧接触。把手部134也可以与外进风口131 间隔设置，从而增加进风面积。壳体组件130还包括电连接部135，电连接部135用于可拆卸地连接电源装置，电源装置可以是电池包。壳体组件130还包括设置在外进风口131的下侧的支架136，支架136形成一支撑平面，在电连接部135未安装电池包时，吹风机100整机的重心在支撑平面所在的平面内的投影位于支撑平面内，从而使得吹风机100可以通过支架136被平稳地放置到平面上。吹风机100整机的重心在支撑平面所在的平面内的投影位于外进风口131在该平面内的投影内。
参照图5，外进风口131的有效进风面积a1与内进风口151垂直于第一轴线101的横截面面积a2的比值大于等于1.8。外进风口131的有效进风面积a1与内风管150在一个经过风扇120且垂直于第一轴线101的平面内的横截面面积a3的比值大于等于2小于等于5，从而提升吹风机100的进风风量和进风效率。外进风口131的有效进风面积a1与内风管150在一个经过风扇120且垂直于第一轴线101的平面内的横截面面积a3的比值大于等于3小于等于4.5，并且外进风口131和内进风口151的间距被相对增加，从而降低外进风口131处的风速，降低风阻，以提升进风效率。
外进风口131的前端部131a在第一轴线101的轴线方向上与内进风口151的距离L1大于等于3mm，从而降低吹风机100运行过程中产生的噪音。可选的，为了提升进风效率，外进风口131的前端部131a在第一轴线的轴线方向上与内进风口151的距离L1大于或等于40mm且小于或等于100mm。
示例性地，如图6所示，风罩133包括从前到后依次设置的第一肋条133a、环形部133b、第二肋条133c以及中心部133d，环形部133b连接第一肋条133a和第二肋条133c。环形部133b围绕第一轴线101，第二肋条133c以及中心部133d设置在内进风口151的后侧，中心部133d设置在第一轴线101上。第二肋条133c连接环形部133b和中心部133d，第二肋条133c在沿着连接环形部133b和中心部133d的路径上与第一轴线101之间的距离逐渐变小。也即是说，第二肋条133a自环形部133b逐渐朝向中心部133d收缩。
参照图6和图7，所述电连接部135包括，滑块1351、弹性元件1352、定位槽1353。滑块1351具有第一定位件1354和第二定位件1355。弹性元件1352与滑块1351抵接。滑块1351设置于定位槽1353内，第一定位件1354和第二定位件1355被设置与定位槽1353抵接，并使得滑块1351可在定位槽1353内滑动。电连接部135包括连接端和设置在连接端的极片，在电池包连接到电连接部135时，电池包抵接到连接端且与极片接触。滑块1351部分露出连接端，在未安装电池包时，滑块1351包围极片，从而用户不能直接接触极片，防止用户接触极片造成触电。弹性元件1352和滑块1351连接和抵接，在用户插入电池包时，滑块1351从 连接端外侧向定位槽1353内部滑动，由第一定位件1354和第二定位件1355支撑滑块1351在定位槽1353内部的滑动，滑块1351产生位移使得极片露出，从而电池包连接极片实现电连接。
第一定位件1354和第二定位件1355在高度方向上间隔设置，使得定位槽1353可以具有一定的高度，从而防止灰尘堵塞定位槽1353，从而减小了粉尘导致滑块1351卡死的风险。第一定位件1354和第二定位件1355的设置，也可以降低滑块1351在定位槽1353内的晃动。
电连接部135还包括锁定件1356和释放按钮1357，在电池包连接到电连接部135时，锁定件1356抵接到滑块1351前端部131a，限制弹性元件1352带动滑块1351向前移动，即阻止滑块1351向定位槽1353外部移动。锁定件1356连接有第二弹性件1358，在用户拨动释放按钮1357压缩第二弹性件1358时，锁定件1356被带动产生位移，不再限制滑块1351的运动，弹性件推动滑块1351带动电池包从电连接部135拔出。
吹风机100在工作过程中，风扇120高速转动，容易产生静电。静电不仅容易击穿吹风机100的电子元件，造成吹风机100损坏，还容易产生电火花打击用户。为了降低风扇120产生的静电，需要降低风叶数量，但是如果直接降低风叶数量会导致风扇120产生的风量不足，从而降低吹风机100的性能。可选的，参照图8、图9和图10，风扇120包括风叶122，风叶122的外径L2被设置大于78mm且小于130mm，且两个风叶122的最小间距被设置大于等于8mm且小于等于12mm，这里，如果风叶122的间距过低，因气流对风叶的摩擦，会增大风扇转动时产生的静电，如果风叶122的间距过高，又会导致风扇产生的风量降低。风叶的入口角α1被设置大于等于5°且小于等于20°，风叶122的入口角是指风叶122的根部122a的前段的切线与风扇120轴线的夹角(风叶122的根部122a的前段是指风叶122的根部122a的相对先切割空气的部分)。
风叶122的数量被设置大于等于8且小于等于12片。风叶122的扭转角α2被设置大于等于45°且小于等于54°，我们发现，风叶122的扭转角如果过高的设计，会导致轴向产生的风力较小，风叶122的扭转角如果过低的设置，会使得气流从风叶122的径向方向流散，从而需要设置恰当的风叶122扭转角度以提升风扇的出风量。风扇120的轮毂120a的直径L3被设置大于等于35mm且小于等于45mm，风叶122的根部122a的长度L4被设置大于等于18mm且小于等于29mm。风叶122的边缘长度L5被设置大于等于8.5mm且小于等于14.5mm。本实施例提出的风扇120，相对于传统的风扇120在相同转速时能降低切割空气的频率，且使得风扇120转动产生的噪音降低，轮毂直径比被设置大于等于0.41且小于等于0.5，以及降低风叶122入口角，以及增加风叶122的根部122a的弦长，可以有效提升风扇120的动能 效率，相同动力下，使得风扇120所能产生的风量增加。其中，轮毂直径比为风叶122的外径L2和轮毂120a的直径L3的比值。可选的，风叶122的外径L2被设置大于78mm且小于98mm，可以较好的提升动能效率。
风叶122的外径被设置大于82mm且小于94mm，风扇120在其轴心的轴向投影上，两个相邻风叶122的相近的端点与轴心的连线形成的夹角被设置大于等于10度且小于等于20度。可选的，两个相邻风叶122的相近的端点与轴心的连线形成的夹角被设置大于等于12度且小于等于18度。风叶122的入口角α1被设置大于等于5°且小于等于15°。风叶122的数量被设置大于等于8且小于等于9片。例如，在实施例中，风叶122的数量被设置为9片。风扇120的轮毂120a的直径L3被设置大于等于38mm且小于等于42mm，风叶122的根部122a的长度L4被设置大于等于20mm且小于等于26mm。风叶的边缘长度L5被设置大于等于10mm且小于等于13mm。本实施例提出的风扇120，相对于传统的风扇120在相同转速时能降低切割空气的频率，且使得风扇120转动产生的噪音降低，可选的通过相对提升轮毂直径比(风叶122的外径和轮毂120a的直径之比)被设置大于等于0.43且小于等于0.49，以及降低风叶的入口角，以及增加风叶122的根部122a的弦长，可以有效提升风扇120的动能效率，相同动力下，使得风扇120所能产生的风量增加。
参照图11，内风管150内部形成固定马达110的导流锥152，马达110被设置在导流锥152之内，且在第一轴线101的轴向方向上，风扇120轮毂的直径和导流锥152端面的直径一致或相差不大于风扇120轮毂直径的10％，从而在第一轴线101的轴向方向上，风扇120轮毂的投影和导流锥152的投影基本重叠，使得风扇120轮毂和导流锥152在第一轴线101的径向方向上没有间隙。
在马达110运行时，风扇120转动产生高速气流，风扇120附近的气压较低，散热气流从导流锥152的前端部131a流向导流锥152的后端部131b，即风扇120附近，而风扇120轮毂和导流锥152尺寸相近地设置减小两者之间的缝隙，使得风扇120旋转产生的气流流向导流锥152内部的气流量减小，防止导流锥152内部的气流紊乱，从而可以有效提升马达110的散热效率。
参照图6和图12，吹风机100还包括控制单元170和操作组件160。风扇120被马达110驱动转动，电源装置121用于给马达110供电，控制单元170控制马达110的运行，操作组件160与控制单元170可通信地连接。操作组件160包括扳机161，扳机161供用户控制马达110的开启和转速。操作组件160还包括调速旋钮162，调速旋钮162被设置可被操作执行第一动作和第二动作。在调速旋钮162被操作执行第一动作时，调速旋钮162发送电信号 给操作组件160调节并锁定马达110的转速。在调速旋钮162被执行第二动作时，调速旋钮162发送电信号给操作组件160以锁定风扇120位于最大档位旋转。吹风机100还包括控制电路，电源装置121、控制单元170和操作组件160通过控制电路实现电连接。
第一动作为沿着第一方向或第二方向旋转调速旋钮162，第二动作为按动调速旋钮162。内风管150用于支撑马达110。扳机161设置在把手部134的上侧，调速旋钮162被设置于把手部134的下侧，从而使得用户可以在握持把手部134时，握持的手同时可以触摸并控制扳机161和调速旋钮162，并且可以按动扳机161，以及对调速旋钮162执行第一动作和第二动作。即用户在握持把手部134时，可以实现按动扳机161同时按动调速旋钮162，或者按动扳机161同时旋转调速旋钮162，或是同时按动扳机161并按动和旋转调速旋钮162。
可选的，调速旋钮162在被执行第一动作时，发送位置信号给控制单元170以调节并锁定马达110的转速。
控制单元170被设置为集成的PCB板，在扳机161被用户按动发生位移变化时，发送第一类信号给控制单元170，控制单元170根据第一类信号的信息控制马达110的转速。可选的，通过发生位移的扳机161改变控制电路的电阻值，从而发送相应的电压信号给至控制单元170，进而调节占空比，从而控制马达110的转速，此时第一类信号为电压信号。在控制单元170被设置仅在接收到第一类信号时，控制马达110开启。可选的，在电压信号达到预设值时，控制单元170控制马达110开启。在扳机161不再被按动时，控制单元170根据第一类信号的变化控制马达110停转。
调速旋钮162被操作第一动作，即调速旋钮162被旋转时，发送第二类信号给控制单元170，控制单元170根据第二类信号锁定马达110的最低转速。可选的，第二类信号为相位信号，调速旋钮162被旋转时，输出变化的相位信号，控制单元170根据相位信号的变化调节控制电路的占空比，从而调速过程更平滑可靠。
在用户通过调速旋钮162锁定风扇120的最低转速后，用户在按动扳机161时，控制单元170接收第一类信号时，仍会相应地提升风扇120的转速，而在用户松开扳机161后，受调速旋钮162输出转速信号的限制，风扇120的转速可以被降到调速旋钮162所锁定的最低转速。在调速旋钮162被转动到某一位置时，风扇120的转速不会低于该位置对应的转速。
可选的，调速旋钮162被设置向第一方向旋转时，控制单元170增加对马达110的最低锁定转速。即在调速旋钮162被相对向第一方向旋转30度时，控制单元170控制马达110的最低锁定转速为第一转速。在调速旋钮162被相对旋转60度时，控制单元170控制马达110的最低锁定转速为第二转速，且第二转速大于第一转速。在马达110的最低锁定转速为第一 转速时，控制单元170可根据扳机161输出的第一类信号控制马达110以大于第一转速的转速旋转。在扳机161位置对应的速度小于第一转速时，控制单元170控制马达110以第一转速运行。
调速旋钮162具有对应于最大锁定速度的旋转位置，即调速旋钮162被向第一方向旋转达到或超出某一角度时，控制单元170接收第二类信号控制马达110的最低锁定转速处于最高数值。此时，调速旋钮162在旋转位置继续向第一方向转动时，控制单元170不再增加对马达110的最低锁定速度。调速旋钮162在被朝向第一方向旋转到某一角度时，在调速旋钮162被操作向第一方向相反的第二方向旋转时，发送第二类信号给控制单元170，控制单元170控制根据第二类信号控制降低马达110的最低锁定转速，在持续将调速旋钮162向第二方向转动时，对马达110的最低锁定转速可以降为零。
调速旋钮162发出的第二类信号包括第一脉冲信号和第二脉冲信号，控制单元170通过识别第一脉冲信号和第二脉冲信号的相对位置确定调速旋钮162的旋转方向，从而识别用户的增速或减速指令。控制单元170通过识别第一脉冲信号和第二脉冲信号的相位差，识别调速旋钮162的转动角度，从而对应的调节马达110的最低锁定转速。
调速旋钮162下方设有感应元件，调速旋钮162被操作以执行第二动作时，即调速旋钮162在被按动时，感应元件感应调速旋钮162的动作，发送第三类信号给控制单元170，控制单元170在接收到第三类信号时控制马达110以设定的最大转速运行，在马达110以最大转速运行时，风扇120被以最大转速驱动转动，控制单元170锁定风扇120位于最大档位旋转。可选的，马达110的最低锁定转速的最大值被设置小于马达110的最大转速，即用户仅能通过操作调速旋钮162以第二动作时，马达110能被驱动以最大转速运行，通过旋转调速旋钮162无法实现将马达110调控到该最大转速。在调速旋钮162被操作执行第二动作时，控制单元170接收第三类信号将马达110锁定到该最大转速，此时释放扳机161也不会使得马达110停转。
在本申请的一种实施方式中，操作组件160包括扳机161和调速旋钮162，扳机161被设置被按动时，控制单元170控制马达110启动，且扳机161被按动的位移量和转速成正比。在调速旋钮162未被操作时，扳机161被松开，则控制单元170控制马达110停转。具体控制原理和上述实施例相似，在此不再详述。
调速旋钮162被设置可以通过操作锁定当前扳机161所调节的转速。在用户按动扳机161使得马达110以第一转速输出时，调速旋钮162被操作向第一方向旋转某一角度以激活对马达110转速的锁定，该角度可以是调速旋钮162的一个旋转单位或两个旋转单位，如调速旋 钮162被旋转15度为调速旋钮162的一个旋转单位。用户按动扳机161控制马达110以第一转速输出时，再使得调速旋钮162向第一方向旋转某预设角度，此时调速旋钮162产生第二类信号给控制单元170，控制单元170根据第二类信号控制马达110转速维持在第一转速。在通过旋转调速旋钮162进行马达110转速锁定后，松开扳机161，控制单元170控制马达110仍以第一转速转动。在通过旋转调速旋钮162对马达110转速锁定后，沿着第一方向旋转调速旋钮162，调速按钮发送第二类信号给控制单元170，控制单元170提供过调节占空比调节马达110转速，通过此种方式，使得马达110可以被调节至预设的锁定转速的最高值。控制单元170内设有算法，使得在马达110的转速到达该预设最高值时，沿着第一方向继续旋转调速旋钮162不会再增加马达110的转速。此时，沿着第二方向旋转调速旋钮162，产生第二类信号发送给控制单元170，控制单元170根据第二类信号的信息，控制马达110根据调速旋钮162在第二方向的旋转角度对应降速，直到调速旋钮162被继续向第二方向旋转，使得马达110的速度降为零。
调速旋钮162被按动时，发送第三类信号给控制单元170，控制单元170调节马达110提升转速，，使得风扇处于设定的最大旋转速度，该最大旋转速度大于通过旋转调速旋钮162而能锁定转速的最高值。此时将调速旋钮162向第一方向旋转至少一个旋转单位，调速旋钮162向控制单元170发送第二类信号，从而控制单元170锁定马达110处于该最大转速。控制单元170被设置仅在接收到调速旋钮162向第二方向旋转而产生的第二类信号时，控制马达110脱离锁定状态，结束马达110的最大转速状态。
控制单元170被设置在把手部134中。吹风机100还包括散热件，散热件被设置在控制单元170和外进风口131之间，且散热件和控制单元170至少部分接触，且散热件靠近外进风口131并至少部分暴露于外进风口131。散热件用于引导控制单元170产生的热量，由进风部产生的气流带走散热件吸收的热量，从而提升对控制单元170的散热效果。

Claims (15)

  1. 一种吹风机，包括：
    马达；
    风扇，被所述马达驱动绕第一轴线转动；
    电源装置，用于给所述马达供电；
    壳体组件，容纳所述马达，所述壳体组件包括：
    内风管，形成有内进风口；
    外风管组件，包围所述内风管；
    其中，所述外风管组件包括外风管和风罩，所述外风管设置在所述风罩的前侧，所述外风管远离所述风罩的一端形成外出风口，所述风罩形成外进风口，所述外进风口在沿所述第一轴线方向上具有前端部和后端部；在沿所述第一轴线方向上，所述内进风口位于所述前端部和所述后端部之间。
  2. 根据权利要求1所述的吹风机，其中，在沿所述第一轴线方向上，所述外进风口的前端部与所述内进风口之间的距离大于等于3mm。
  3. 根据权利要求1所述的吹风机，其中，在沿所述第一轴线方向上，所述外进风口的前端部与所述内进风口的距离大于等于40mm且小于或等于100mm。
  4. 根据权利要求1所述的吹风机，其中，所述外进风口的有效进风面积与所述内进风口垂直于所述第一轴线的横截面面积的比值大于等于1.8。
  5. 根据权利要求1所述的吹风机，其中，所述风罩包括多个肋条，多个所述肋条在围绕所述第一轴线的圆周方向上依次排布，相邻的两个所述肋条之间形成所述外进风口。
  6. 根据权利要求5所述的吹风机，其中，相邻的两个所述肋条的间隔被设置大于等于8mm且小于等于10mm。
  7. 根据权利要求1所述的吹风机，其中，所述风罩一部分设置在所述内进风口的前侧，另一部分设置在所述内进风口的后侧，从而使得从所述风罩进入的气流能从所述内进风口的前侧和后侧流向所述内进风口。
  8. 根据权利要求7所述的吹风机，其中，所述外进风口总面积大于20000mm 2。
  9. 根据权利要求1所述的吹风机，其中，所述风罩包括从前到后依次设置的第一肋条、环形部、第二肋条以及中心部，所述环形部连接第一肋条和第二肋条，所述第二肋条连接所述环形部和所述中心部，所述第二肋条在沿着连接所述环形部和所述中心部的路径上与所述第一轴线之间的距离逐渐变小。
  10. 根据权利要求1所述的吹风机，其中，所述外进风口在沿所述第一轴线方向上的尺 寸大于等于且小于等于100毫米且小于等于300毫米。
  11. 根据权利要求1所述的吹风机，其中，所述风扇包括风叶，所述风叶的数量被设置为9片。
  12. 根据权利要求1所述的吹风机，其中，所述风扇包括风叶，所述风叶的数量被设置大于等于8片且小于等于12片，所述风叶的外径被设置大于78mm且小于130mm。
  13. 根据权利要求12所述的吹风机，其中，所述风叶的外径被设置大于78mm且小于98mm。
  14. 根据权利要求12所述的吹风机，其中，所述风叶的入口角被设置大于等于5°且小于等于20°。
  15. 根据权利要求12所述的吹风机，其中，所述风叶的外径与所述风扇的轮毂的直径的比值大于或等于0.41且小于或等于0.5。
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USD1029425S1 (en) * 2021-04-23 2024-05-28 Zhejiang Safun Industrial Co., Ltd. Blower vacuum
USD1025517S1 (en) * 2021-09-02 2024-04-30 Lei Wan Cordless leaf blower
US20230296102A1 (en) * 2022-03-21 2023-09-21 Milwaukee Electric Tool Corporation Axial blower
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6199295B1 (en) * 1999-12-06 2001-03-13 Conair Corporation Variable-configuration hair dryer and nozzle
CN107259762A (zh) * 2017-08-11 2017-10-20 浙江金达电机电器有限公司 大风量吹风机
CN108175169A (zh) * 2018-02-26 2018-06-19 深圳科利电器有限公司 一种可吸入水份的吹风机
CN108420173A (zh) * 2018-05-14 2018-08-21 杭州乐秀电子科技有限公司 一种用于电吹风的风嘴及其电吹风
CN109820320A (zh) * 2019-03-06 2019-05-31 凯灿贸易（深圳）有限公司 吹风机
CN110680071A (zh) * 2018-07-05 2020-01-14 松下万宝美健生活电器(广州)有限公司 一种电吹风用风嘴及包括该风嘴的电吹风
CN110680069A (zh) * 2018-07-05 2020-01-14 松下万宝美健生活电器(广州)有限公司 一种出风结构及具有其的电吹风
CN210353624U (zh) * 2019-03-06 2020-04-21 凯灿贸易（深圳）有限公司 吹风机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11248626B2 (en) * 2013-02-20 2022-02-15 Chervon (Hk) Limited Handheld blower
WO2019062279A1 (zh) * 2017-09-30 2019-04-04 南京德朔实业有限公司 吹风机
CN210341774U (zh) * 2019-07-03 2020-04-17 绍兴市上虞冠业电器有限公司 一种吹风机
JP2023004047A (ja) * 2021-06-25 2023-01-17 株式会社やまびこ 軸流ブロワ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6199295B1 (en) * 1999-12-06 2001-03-13 Conair Corporation Variable-configuration hair dryer and nozzle
CN107259762A (zh) * 2017-08-11 2017-10-20 浙江金达电机电器有限公司 大风量吹风机
CN108175169A (zh) * 2018-02-26 2018-06-19 深圳科利电器有限公司 一种可吸入水份的吹风机
CN108420173A (zh) * 2018-05-14 2018-08-21 杭州乐秀电子科技有限公司 一种用于电吹风的风嘴及其电吹风
CN110680071A (zh) * 2018-07-05 2020-01-14 松下万宝美健生活电器(广州)有限公司 一种电吹风用风嘴及包括该风嘴的电吹风
CN110680069A (zh) * 2018-07-05 2020-01-14 松下万宝美健生活电器(广州)有限公司 一种出风结构及具有其的电吹风
CN109820320A (zh) * 2019-03-06 2019-05-31 凯灿贸易（深圳）有限公司 吹风机
CN210353624U (zh) * 2019-03-06 2020-04-21 凯灿贸易（深圳）有限公司 吹风机

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4162836A4

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