WO2020093981A1 - 电吹风 - Google Patents

电吹风 Download PDF

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Publication number
WO2020093981A1
WO2020093981A1 PCT/CN2019/115432 CN2019115432W WO2020093981A1 WO 2020093981 A1 WO2020093981 A1 WO 2020093981A1 CN 2019115432 W CN2019115432 W CN 2019115432W WO 2020093981 A1 WO2020093981 A1 WO 2020093981A1
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WO
WIPO (PCT)
Prior art keywords
notch
housing
hair dryer
airflow
barrel
Prior art date
Application number
PCT/CN2019/115432
Other languages
English (en)
French (fr)
Inventor
喻金明
叶志文
肖林
Original Assignee
杭州乐秀电子科技有限公司
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
Priority claimed from CN201811321728.9A external-priority patent/CN111150203A/zh
Priority claimed from CN201811370145.5A external-priority patent/CN111194984A/zh
Application filed by 杭州乐秀电子科技有限公司 filed Critical 杭州乐秀电子科技有限公司
Publication of WO2020093981A1 publication Critical patent/WO2020093981A1/zh

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Classifications

    • 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

Definitions

  • the invention relates to the field of household appliances, in particular to an electric hair dryer.
  • the hair dryer includes a casing and a duct
  • the airflow drawn into the hair dryer through the fan unit includes an axial section extending between the casing and the duct, and the airflow is generally annular, which is beneficial to the interior of the casing
  • the air flow along the guide of the housing and the side walls of the duct quickly blows out from the hair dryer. But in this way, after the hair dryer is energized, the air flow drawn into the hair dryer by the fan unit will be blown out quickly.
  • the hair dryer with high air volume and high wind pressure can startle people and temporarily hold their breath under the action of the air flow; or, when the air outlet is directed at the hair (long-haired girls may blow up from the hair tip first), the scalp, the electricity After the hair dryer is turned on, the airflow of high wind pressure instantly blows to the hair and scalp, causing the hair and scalp to bear a large force instantly, causing discomfort. Open the low wind gear first, and then switch to the high wind gear, the operation is more troublesome. Moreover, if the air volume and pressure are small, the hair drying efficiency may be reduced.
  • the high wind pressure can quickly disperse the wet hair during the blowing process, as the moisture gradually evaporates, the hair becomes lighter and lighter, and the hair flutters under the wind under a large angle, which is easy to be messy. There is one more adjustment step in the small gear, which is more troublesome.
  • the hair dryer includes a fan unit, a heating unit, a casing, and a handle assembly.
  • the handle assembly is connected to the casing.
  • the fan unit is provided in the handle assembly or the casing.
  • the heating unit is provided in the casing.
  • the heating unit is provided in the handle assembly.
  • the air inlet on the top or the air inlet provided on the casing sucks the airflow into the housing.
  • the heating unit is used to heat the airflow. If the heat generated by the heating unit is not dissipated in time, it will cause the heating unit to become red, resulting in a safety accident.
  • the technical problem to be solved by the present invention is to provide an electric hair dryer.
  • optimizing the air duct structure it can provide an instant air volume and a small air pressure at the same gear when starting up, and the air volume and air pressure gradually increase with the extension of the startup time A large and stable electric hair dryer.
  • By optimizing the air outlet it can provide an electric hair dryer that can adjust the wind pressure by manually changing the distance between the air outlet of the hair dryer and the surface of the hair in the same gear.
  • the structure enables the heat in the hair dryer to be dissipated in time, is safe to use, and provides a good user experience.
  • An electric hair dryer includes a housing, a handle assembly connected to the housing, a fan unit, a heating unit, an air inlet and an air outlet;
  • the fan unit is used to suck airflow into the electric blower from the air inlet and blow out from the air outlet to form a main air channel, and the heating unit is used to heat the airflow;
  • the fan unit includes a fan blade and a motor for driving the fan blade to rotate;
  • the main air duct includes an axial section extending in the direction of the axis of the housing, and a notch barrel with a notch is provided in the casing, the notch barrel and the cylindrical wall inside the casing define the axial section .
  • the advantage is that the air flow in the axial section is converged at the gap through the setting of the notch barrel, which increases the air storage volume of the axial section.
  • the air flow is drawn into the axial section by the fan unit and part of the air flow Gradually converge at the gap or enter the inside of the gap tube through the gap, and the remaining airflow is blown out from the air outlet along the direction defined by the outer side wall and the cylindrical wall of the gap tube, so that the instantaneous air pressure and air volume at the instant of the blower start are relatively small;
  • the airflow at the gap / or the internal space of the gap tube is filled, this part of the airflow will be blown out of the air outlet under the drive of the remaining airflow in the axial section, increasing the air pressure and air volume, and the storage at the gap
  • the airflow can balance the air volume and wind pressure at the air outlet, so that the air volume and wind pressure blown from the air outlet are relatively constant.
  • the gap extends along the axis direction of the gap cylinder, and the ratio of the length of the gap to the length of the gap cylinder is not less than 1/2.
  • the advantage is that an appropriate wind storage area is formed to buffer the air volume and wind pressure at the instant the blower starts.
  • the ratio of the two lengths is less than 1/2, the buffering effect on the air volume and pressure at the instant of the hair dryer is not obvious.
  • connection between the handle assembly and the housing forms a communication port that connects the two, and the notch extends to the upstream side of the communication port.
  • the advantage is that it can buffer the air volume and wind pressure at the instant of the start of the hair dryer, and will not lose more air volume and wind pressure.
  • connection between the handle assembly and the housing forms a communication port that connects the two, and the notch extends to / over the downstream side of the communication port; or the notch extends between the upstream side and the downstream side of the communication port.
  • the advantage is to increase the area of the wind storage area and buffer the air volume and wind pressure at the instant of the start of the hair dryer.
  • the communication port is staggered from the gap.
  • the advantage is that the airflow at the communication port enters the axial section, increasing the air volume and pressure.
  • the notch is located above the axis of the housing.
  • the advantage is that when using a hair dryer to blow hair, the position above the axis of the housing is relatively far away from the surface below the scalp surface, and the air outlet corresponds to the location of the internal gap where the air pressure and air volume are relatively small, so that the air pressure and air volume of the air outlet The larger position is facing the hair for a longer time, which is helpful for drying the hair quickly.
  • the notch barrel is provided with a perforation for allowing the airflow of the main air duct to enter the notch barrel, and the projections of the perforation and the notch at least partially coincide;
  • the notch barrel is provided with a perforation for allowing the airflow of the main air duct to enter the notch barrel, the perforation is located on the upstream side of the starting end of the notch, and the two are arranged oppositely.
  • An electric hair dryer includes a casing, a handle assembly connected with the casing, a fan unit, a heating unit, an air inlet and an air outlet;
  • the fan unit is used to suck airflow into the electric blower from the air inlet and blow out from the air outlet to form a main air channel, and the heating unit is used to heat the airflow;
  • the fan unit includes a fan blade and a motor for driving the fan blade to rotate;
  • the main air duct includes an axial section extending in the axial direction of the housing, the heating unit is disposed in the axial section, the heating unit includes a notch barrel, and the notch barrel has an axis along its axis A notch extending in the direction, the notch barrel and the cylindrical wall inside the housing define the axial section.
  • the advantage is that through the setting of the notch tube, the airflow can be temporarily collected in the interior of the housing, so that the airflow and the heating unit have sufficient time for heat transfer, and then driven by other airflows from the air outlet, reducing the redness of the heating wire Probability, safer to use.
  • the heating unit further includes a plurality of mica pieces installed on the notch tube, and a heating wire wound on the plurality of mica pieces.
  • the plurality of mica pieces are provided on at least two sides of the notch, and the heating wire is at least Winding above the outer side wall of the notch tube.
  • the advantage is to improve the installation reliability of the mica flakes and prevent the mica flakes from getting out of the installation position, which leads to an increase in wind resistance and loss of air volume.
  • the heating wire to be wound at least above the outer side wall of the notch tube.
  • the heating wire surrounds the entire circle; the advantage is to increase the heating power; or the heating wire is only wound above the notch tube, The gap is open. Reduce the weight of the heating unit.
  • At least one of the plurality of mica pieces is provided corresponding to the notch, and the mica piece has a dangling end that extends toward the notch and extends axially along the notch barrel.
  • the advantage is that the heating wire is supported to prevent the heating wire from being deformed at the notch.
  • the notch barrel includes an axially extending first part, the notch is provided in the first part, the mica piece is snap-fitted with the first part, and the plurality of mica pieces are arranged at even intervals.
  • the advantage is that the mounting bracket is supported to prevent the mounting bracket from being deformed, which in turn causes the heating unit to deform.
  • the notch barrel further includes a second part extending outward in the circumferential direction of the first part at the rear end of the first part, and the rear end of the mica sheet abuts against the inner side of the second part.
  • the advantage is to improve the reliability of the mica sheet fixing.
  • the rear end of the mica sheet has a clamping groove, and the clamping groove abuts against the peripheral edge of the second part.
  • the advantage is to improve the reliability of the mica sheet fixing.
  • An electric hair dryer includes a housing, a handle assembly connected to the housing, a fan unit, a heating unit, an air inlet and an air outlet;
  • the fan unit is used to suck airflow into the electric blower from the air inlet and blow out from the air outlet to form a main air channel, and the heating unit is used to heat the airflow;
  • the fan unit includes a fan blade and a motor for driving the fan blade to rotate;
  • the main air duct includes an axial section extending along the axial direction of the housing, a notch tube with a notch is provided in the housing, the notch extends along the axial direction of the housing, and the air outlet is located on the shaft A non-closed gap at the end of the section, the non-closed gap being defined by the notched barrel and the cylindrical wall inside the housing.
  • the advantage is that the airflow blown from the non-closed gap can drive the airflow of the non-closed gap of the non-closed gap.
  • the two airflows have a junction point. When the distance from the air outlet to the surface of the hair is greater than the distance from the junction to the air outlet, the two The mixed airflow can reduce the wind pressure. When blowing long hair, it is not easy to blow the hair at an excessively large flying angle.
  • the applied force is relatively small, when the user only needs to dry the hair without styling, long-term blowing in one direction will not change the original direction of the hair root, making the hair after blowing easier to care for;
  • the distance from the tuyere to the surface of the hair is less than the distance from the junction to the air outlet, the two airflows reach the surface of the hair respectively, and the wind pressure is large, which can blow away the wet hair, increase the contact area of the hot air and the hair, and quickly dry the hair.
  • the air pressure can be adjusted by changing the distance between the air outlet and the surface of the hair, to achieve different blowing effects, without the need to adjust the gear button, which is more convenient.
  • the open portion is located on one side of the centerline of the non-closed gap.
  • the advantage is that the non-closed gap is set around its center line, and the center of the non-closed gap is on the inner side, so that the airflow from the main air duct blown from the air outlet and the airflow at the open part driven by the airflow form a complete circle When blowing hair, the distance between the air outlet and the hair, these two airflows will merge into one before reaching the hair, improving the blowing effect.
  • the opening is located above the center line of the housing.
  • the advantage is that, according to the user's habit of holding a hair dryer during the blowing process, the area below the center line of the casing is the part that always plays a major role in the entire blowing process.
  • the air flow at the opening is mainly caused by the main air blowing from the air outlet
  • the airflow is driven by the air duct, and the air volume and pressure are relatively small. If the user is used to blowing the air outlet of the hair dryer close to the hair, then the two airflows reach the surface of the hair before they merge into one, and the opening is located at the centerline of the shell
  • the upper part of the is beneficial to make the greater wind pressure and more air flow blow to the hair, to achieve the purpose of drying the hair quickly.
  • both ends of the opening are located on both sides of the centerline of the handle assembly.
  • the advantage is that the opening part is set at a position away from the surface of the hair relatively more time during the blowing process, which is beneficial to make the greater wind pressure and more air flow blow toward the hair, so as to achieve the purpose of drying the hair quickly.
  • the opening and the notch face the same direction.
  • the axial section is defined by the notch barrel and the cylindrical wall inside the housing, and the non-closed gap is defined by the notch barrel and the cylindrical wall.
  • the advantage is that a non-closed gap is defined by the cooperation of the gapped cylinder and the cylindrical wall, and the air flow in the axial section is blown out from the non-closed gap, and the flow of the air flow at the non-closed position of the non-closed gap can be driven.
  • the two air flows have A junction, when the distance from the air outlet to the surface of the hair is greater than the distance from the junction to the air outlet, the two airflows can play a role in reducing the wind pressure after mixing; when the distance from the air outlet to the surface of the hair is less than the junction to the air outlet At a distance of two, the two airflows respectively reach the surface of the hair, and the wind pressure is large.
  • the air pressure can be adjusted by changing the distance between the air outlet and the surface of the hair to achieve different blowing effects.
  • the electric hair dryer further includes a closing portion that closes a part of the gap between the notch barrel and the cylindrical wall to form the non-closed gap.
  • the advantage is that the structure is simple and the assembly is convenient.
  • FIG. 1 is a schematic diagram of the structure of the electric hair dryer of the present invention.
  • FIG. 2 is a cross-sectional view 1 indicated by S in FIG. 1 in an example of the present invention.
  • FIG. 3 is a cross-sectional view 2 indicated by S in FIG. 1 in yet another example of the present invention.
  • FIG. 4 is a cross-sectional view 3 indicated by S in FIG. 1 in another example of the present invention.
  • FIG. 5 is a schematic structural diagram of a notch tube according to an example of the present invention.
  • FIG. 6 is a schematic diagram of another angle structure of the notch tube according to the present invention.
  • FIG. 7 is a schematic diagram of another angle structure of the notch tube according to the present invention.
  • FIG. 8 is a schematic structural view of the air outlet according to the present invention.
  • FIG. 9 is a schematic structural view of the air outlet of the present invention from another angle.
  • FIG. 10 is a schematic diagram of another structure of the notch tube according to the present invention.
  • FIG. 11 is a schematic diagram of another structure of the notch tube according to the present invention.
  • FIG. 12 is a schematic diagram of yet another structure of the notch tube according to the present invention.
  • FIG. 13 is another schematic structural diagram of the air outlet according to the present invention.
  • FIG. 14 is a schematic structural view of the non-enclosed pipeline of the present invention.
  • 15 is a schematic structural view of the heating unit of the present invention.
  • FIG. 16 is a schematic diagram of the structure of the hair dryer in an example of the present invention.
  • 17 is a partial cross-sectional view of the hair dryer in an example of the present invention.
  • FIG. 18 is an enlarged view of A in FIG. 17.
  • FIG. 19 is an enlarged view of B in FIG. 17.
  • 20 is a cross-sectional view of the handle assembly in an example of the present invention.
  • 21 is an exploded view of the handle assembly in an example of the present invention.
  • 22 is a schematic structural view of the outer handle in an example of the present invention.
  • FIG. 23 is another cross-sectional view of the handle assembly according to an example of the present invention.
  • 24 is an exploded view of the handle assembly according to yet another example of the present invention.
  • 25 is a cross-sectional view of the handle assembly according to another example of the present invention.
  • Fig. 26 is an enlarged view of C in Fig. 25.
  • an electric hair dryer includes a housing 1, a handle assembly 2 connected to the housing 1, a fan unit 22, a heating unit 3, an air inlet 4 and an air outlet 5;
  • the fan unit 22 is used to draw airflow into the electric blower from the air inlet 4 and blow out from the air outlet 5 to form a main air duct 6, and the heating unit 3 is used to heat the airflow;
  • the fan unit 22 includes a fan blade 2203 and a motor 2201 for driving the fan blade 2203 to rotate;
  • the main air duct 6 includes an axial section 602 extending along the axial direction of the housing 1, the housing 1 is provided with a notch barrel 7 with a notch 701, the notch barrel 7 and the cylindrical shape inside the housing 1
  • the wall 8 defines the axial section 602.
  • the airflow direction of the axial section 602 is as indicated by arrows in 2, 3, and 4.
  • the fan unit 22 may be disposed in the housing 1, at this time, the air inlet 4 is located at the rear end of the housing 1, the first air outlet is located at the front end of the housing 1, and the heating unit 3 is disposed in the housing 1 and located in the axial section 602
  • the fan unit 22 can also be provided in the handle assembly 2, at this time, the air inlet 4 is provided on the handle assembly 2, and the air inlet 4 is located below the fan unit 22, the air outlet is located at the front end of the housing 1, the heating unit 3 can be provided Within the housing 1 and in the axial section 602, it can also be disposed within the handle assembly 2.
  • the cylindrical wall 8 inside the housing 1 may be the inner side wall of the housing 1, and the axial section 602 of the main air duct 6 is defined by the inner side wall of the housing 1 and the outer side wall of the notched barrel 7 ; It can also be an inner tube provided in the outer shell 1 as a separate component, and the axial section 602 of the main air duct 6 is defined by the inner side wall of the inner tube and the outer side wall of the notch tube 7.
  • part of the airflow of the axial section 602 is collected and stored at the notch 701, or the airflow of the axial section 602 enters the inner space of the notch barrel 7 through the notch 701 ,
  • the rest of the airflow extends along the space defined by the cylindrical wall 8 and the outer wall of the notch barrel 7 and is blown out from the air outlet, thereby reducing the air volume and wind pressure at the moment of startup; as the working time of the hair dryer increases, the notch 701 or the notch barrel 7
  • the airflow inside is gradually collected until saturation, and the air volume and pressure are gradually increased and gradually constant to improve the user experience.
  • the notch 701 will be described in detail below. As shown in FIG. 5, the notch 701 extends along the axis (b-b ') of the notch barrel 7. The ratio of the length of the notch 701 to the length of the notch barrel 7 is not Less than 1/2, the length of the notch 701 is L1, and the maximum length B of the notch barrel 7 is.
  • the notch 701 may extend from the upstream end of the notch tube 7 or may extend from a position close to the upstream end. In the present invention, "upstream” refers to a position near the rear end of the housing 1, and “downstream” refers to a position away from the rear end of the housing 1. In this example, the ratio of the length of the notch 701 to the length of the notch barrel 7 is 0.95. Increase the area of the wind storage area to effectively buffer the air volume and wind pressure at the moment when the motor 2201 starts.
  • the central angle of the notch 701 is ⁇ , 15 ° ⁇ 180 °, which has the advantages of not only buffering the air volume and wind pressure at the instant of the start of the hair dryer, but also ensuring the loss of wind pressure and air volume Not serious, dry hair quickly; when ⁇ ⁇ 15 °, the gap 701 is too small, and the buffer effect on the air volume and wind pressure at the instant of the hair dryer is not obvious; when ⁇ > 180 °, the gap 701 is too large, causing a large amount of The air flow accumulated in the casing 1 cannot be blown out from the air outlet in time, which causes serious air volume loss.
  • the central angle ⁇ is the angle formed by the two longest lines that form the two ends of the notch 701 to the axis of the notch tube 7.
  • the connection between the handle assembly 2 and the housing 1 forms a communication port 9 for communication between the two, and the notch 701 extends to the upstream side of the communication port 9; or, the handle assembly 2 A communication port 9 connecting the two is formed at the connection with the housing 1.
  • the notch 701 extends to / over the downstream side of the communication port 9; or the notch 701 extends between the upstream side and the downstream side of the communication port 9. In this example, the notch 701 crosses the downstream side of the communication port 9.
  • the communication port 9 is staggered from the notch 701.
  • staggered means that the edges of the notch 701 are staggered from the communication port 9, and the shortest distance from the notch tube 7 to the communication port 9 is the side wall of the notch tube 7.
  • the notch 701 is located above the axis of the housing 1. Furthermore, the notch 701 is arranged symmetrically with respect to the axis of the handle assembly 2.
  • the notch barrel 7 is provided with a perforation 702 that allows the airflow of the main air duct 6 to enter the notch barrel 7, and the projections of the perforation 702 and the notch 701 at least partially coincide.
  • the projections of the axes of the perforation 702 and the notch 701 are parallel or coincide, preferably the projections of the notch 701 cover the projections of the perforation 702, that is, the projections of the axes of the perforation 702 and the notch 701 coincide.
  • the axis of the notch 701 is parallel to the axis (b-b ') of the notch tube 7.
  • the width of the perforation 702 may be the same as the width of the notch 701; or, the width of the perforation 702 is smaller than the width of the notch 701; In this example, the width of the perforation 702 is smaller than the width of the notch 701.
  • the width of the perforation 702 is K1, which means that it is projected in the direction perpendicular to the axis of the notch barrel 7 and the maximum width perpendicular to the axis of the notch barrel 7; The maximum length parallel to the axis 7 of the notch barrel.
  • the length of the perforation 702 is shorter than the length of the notch 701, thereby reducing the loss of air volume and wind pressure.
  • the projection of the center line (kc-kc ') of the perforation 702 is parallel to or coincides with the projection of the center line of the handle assembly 2. It can be understood that the center line of the perforation 702 intersects the projection of the center line of the handle assembly 2.
  • the perforation 702 is located below the axis of the cylindrical wall 8 and is disposed opposite to the airflow inlet 10.
  • an auxiliary air outlet 11 is provided at the front end of the notch tube 7, and the airflow in the notch tube 7 is blown out from the auxiliary air outlet 11.
  • the notch barrel 7 is provided with a perforation 702 that allows the airflow of the main air duct 6 to enter the notch barrel 7.
  • the perforation 702 is located on the upstream side of the starting end of the notch 701, and the two are arranged oppositely.
  • the notch 701 is a perforation 702 that allows airflow into the notch barrel 7.
  • the air outlet 5 is an unclosed gap at the end of the axial section 602.
  • unclosed gap means that the tuyere 5 as a whole has two open ends 12, and the area formed between the open ends 12 (called the open portion 13) is not used in the axial area of the main air duct 6
  • the narrow slit of the air flow of the segment 602 is blown out.
  • the non-closed gap may be a continuous gap for the air flow of the main air duct 6 axial section 602 to blow out; it may also be a combination of a plurality of small gaps for the main air duct 6 axial section 602 to blow out air flow.
  • an opening 13 is formed between the beginning of the first small gap and the end of the last small gap between the open end 12 It is an entity, but it can also be in other forms.
  • the advantage of making the air outlet 5 a "non-closed slit" is that the wind pressure of the airflow blown from the air outlet 5 is large, and this part of the airflow drives the airflow of the open portion 13 of the non-closed slit, and the air pressure of the airflow is small , A certain distance between the outside of the hair dryer and the air outlet 5 and before reaching the surface of the hair, the two airflows converge into a single airflow, and the wind pressure is appropriately reduced. When blowing long hair, it is not easy to blow the hair at an excessively large flying angle.
  • the non-closed gap has an opening portion 13, and the central angle ⁇ of the opening portion 13 is 15 ° ⁇ ⁇ ⁇ 180 °.
  • the advantage is that the wind pressure to the hair can be reduced and the air flow can be timely removed. Blowing out of the shell 1 does not cause a great loss of wind pressure; when ⁇ ⁇ 15 °, the effect of reducing wind pressure is not obvious, and the hair is easily messed up by blowing.
  • the central angle ⁇ refers to the angle formed by the connection between the two ends of the open portion 13 (that is, the beginning and end of the non-closed gap) and the center of the non-closed gap; if both ends of the open portion 13 have a certain width or end
  • the shape of the part is irregular, it is the angle formed by the two lines on the two ends with the minimum length of the line connecting the center of the non-closed gap.
  • the central angle ⁇ refers to the angle formed by the longest two lines from the open end 12 to the center line of the non-closed gap.
  • the center line of the non-closed gap is the same as the axis of the notch 701 and the notch barrel 7.
  • the air flow part of the main air duct 6 is blown out from the opening part 13.
  • the open portion 13 is located on the side of the centerline of the non-closed gap. This situation indicates that the non-closed gap is placed around its centerline, and the center of the non-closed gap is on the inner side.
  • the airflow at the opening 13 driven by the airflow forms a complete circle. According to the distance between the air outlet 5 and the hair when the user blows the hair, the two airflows will merge into one before reaching the hair, improving the blowing effect.
  • the opening 13 is located above the center line of the housing 1. According to the user's habit of holding an electric hair dryer during the blowing process, the area below the center line of the casing 1 is the part that always plays a major role in the entire blowing process.
  • the air flow at the opening 13 is mainly caused by the main air blowing from the air outlet 5
  • the airflow of the air duct 6 is generated, and the air volume and pressure are relatively small. If the user is used to blowing the air outlet 5 of the hair dryer close to the hair, then the two airflows reach the surface of the hair before they merge into one, and the opening 13 is located
  • the upper part of the center line of the casing 1 is beneficial to make the wind pressure and the air flow blow to the hair, so as to quickly dry the hair.
  • Both ends of the opening 13 are located on both sides of the centerline of the handle assembly 2. Both ends of the opening 13 may be symmetrical or asymmetrical with respect to both sides of the centerline of the handle assembly 2.
  • the non-closed projection is surrounded by multiple curves end to end, that is, the non-closed gap is defined by multiple members.
  • the casing 1 is provided with a notch barrel 7, the axial section 602 is defined by the notch barrel 7 and the cylindrical wall 8 inside the casing 1, and the non-closed gap is defined by the notch barrel 7 and the cylindrical wall 8 limited.
  • the notch 701 extends along the axial direction of the housing 1. The notch 701 may extend from the upstream end of the notch barrel 7 to its downstream, or may extend from the downstream end of the notch barrel 7 to its upstream.
  • the cylindrical wall 8 is provided with a downwardly extending extension 14 that closes a portion of the gap between the notched barrel 7 and the cylindrical wall 8 to form the non-closed
  • the gap in one case, the gap between the notched cylinder 7 and the cylindrical wall 8 is ring-shaped, the extension 14 closes a part of the annular gap to obtain the non-closed gap, the extension 14 abuts against the outer side wall of the gap cylinder 7 and opens Part 13 is the extension 14 shown.
  • the non-closed gap has a C-shaped, U-shaped and other similar shapes; in another case, as shown in FIG.
  • the notch 701 is provided at the front end of the notch tube 7, and the extension 14 closes at least a portion of the notch 701 ,
  • the non-closed gap has a C-shaped, U-shaped and other similar shapes.
  • the notch 701 extends backward from the front end of the notch tube 7, and the ratio of the length of the notch 701 to the length of the notch tube 7 is not less than 1/2.
  • the extending portion 14 closes the notch 701, so that the airflow of the axial section 602 before reaching the non-closed gap is substantially the same as its shape, so that the airflow of the axial section 602 is along the side wall and the notch of the extending portion 14
  • the limitation of the side wall of the tube 7 and the tube-shaped wall 8 is quickly blown out from the air outlet 5, the air flow will not accumulate in the housing 1, reducing the loss of air volume.
  • the front end of the notch barrel 7 is provided with a second notch 15703701 spaced apart from the notch 701, and the extension 14 closes the second notch 15703701 to form the Close the gap.
  • the non-closed gap has an opening 13 which faces the same direction as the notch 701, and the opening 13 is the second notch 15703701.
  • the same axis of the opening 13 and the notch 701 has the advantage of reducing Air volume loss.
  • the end of the housing 1 has an opening 16, and an air outlet member 17 is provided in the opening 16.
  • the air outlet member 17 includes a barrier 171 in the middle and an exterior
  • the outer ring 172, the outer ring 172 and the blocking member 171 are connected by a rib 173, and the non-closed gap is defined by the outer ring 172 and the blocking member 171.
  • the inner casing 1 is further provided with an inner cylinder, and the air outlet member 17 is installed on the inner cylinder.
  • a barrier 171 is provided in the cylindrical wall 8, the barrier 171 and the cylindrical wall 8 are connected by a rib 173, and the non-closed gap is defined by the cylindrical wall 8 and the barrier 171.
  • the airflow in the axial section 602 includes an airflow that is annular before reaching the non-closed gap, and the annular airflow is blown out from the non-closed gap; in this case, the inner cylinder 1 is provided with an inner cylinder, which The annular air flow is defined by the outer side wall of the inner cylinder and the cylindrical wall 8 inside the outer casing 1.
  • the projection of the non-closed gap is surrounded by a single closed curve, that is, the non-closed gap is defined by one member.
  • the housing 1 is provided with a non-closed duct 18, and the airflow having the same shape as the non-closed slit is defined by the non-closed duct 18, and the non-closed slit is located at the end of the non-closed duct 18, so
  • the airflow of the axial section 602 includes the airflow having the same shape as the airflow before reaching the non-closed gap, and the airflow is blown out from the non-closed gap.
  • the heating unit 3 is provided in the axial section 602.
  • the heating unit 3 includes a notch barrel 7 having a notch 701 extending in the direction of its axis, the notch barrel 7
  • the cylindrical wall 8 inside the housing 1 defines the axial section 602. Through the setting of the notch tube 7, the airflow can be temporarily collected in the interior of the housing 1, so that the airflow and the heating unit 3 have sufficient time to transfer heat, and then be blown out of the air outlet 5 under the influence of other airflow, to avoid the heating wire 302 Red, safer to use.
  • the ratio of the length of the notch 701 to the length of the notch barrel 7 is not less than 1/2, forming a wind-out area to perform heat exchange with the heating unit 3 to prevent the heating wire 302 from redness.
  • the length of the gap 701 is not less than 2/3 of the length of the gap tube 7.
  • the heating unit 3 further includes a plurality of mica pieces 301 installed on the notch tube 7 and a heating wire 302 wound on the plurality of mica pieces 301, and the plurality of mica pieces 301 are provided at least on both sides of the notch 701; Further, the plurality of mica pieces 301 are arranged at regular intervals along the axial direction of the notch tube 7.
  • the heating wire 302 surrounds the entire circle; or the heating wire 302 is only wound around the mounting bracket, and the gap 701 is opened.
  • the notch barrel 7 is provided with a structure for fixing the mica sheet 301 corresponding to the notch 701, especially when the notch 701 is long in length, the two ends of the notch barrel 7 are provided with fixing slots for fixing the mica sheet 301;
  • the extension direction of the mica piece 301 and the notch 701 are the same, and the mica piece 301 is disposed directly above the notch 701.
  • the notch barrel 7 is a ceramic heating device.
  • the invention also relates to a heating unit 3 for an electric hair dryer, which includes a plurality of mica sheets 301 and a heating wire 302 wound on the mica sheet 301, wherein the heating unit 3 further includes a mounting bracket having a hollow channel, the A plurality of mica pieces 301 are mounted on the mounting bracket, and the mounting bracket has a notch 701 extending along the axial direction thereof, and the plurality of mica pieces 301 are provided at least on both sides of the notch 701.
  • the hollow mounting bracket is the above-mentioned notched tube 7.
  • the mounting bracket further includes a second portion 20 extending outward in the circumferential direction of the first portion 19 at the rear end of the first portion 19, and the rear end of the mica sheet 301 abuts against the inner side of the second portion 20.
  • the advantage is to improve the fixing reliability of the mica piece 301.
  • the first part 19 is the notch tube 7, and the second part 20 is ring-shaped or circular or U-shaped or C-shaped.
  • the rear end of the mica sheet 301 has a clamping slot, and the clamping slot abuts against the peripheral edge of the second portion 20.
  • the hollow channel is provided with a blocking sheet 21, and the blocking sheet 21 is disposed near the front end of the hollow channel.
  • the advantage is that when the length of the gap 701 is long, the strength of the hollow mounting bracket is improved by the blocking sheet 21 to prevent the mounting bracket from deforming
  • the air flow in the axial section 602 has a large wind resistance, resulting in a loss of air volume.
  • the main air duct 6 includes a handle
  • the vertical section 601 defined by the assembly 2 the connection between the handle assembly 2 and the housing 1 defines the airflow inlet 10 of the airflow from the vertical section 601 into the axial section 602, and the notch 701 is arranged offset from the airflow inlet 10.
  • the airflow inlet 10 is provided on the cylindrical wall 8, and the airflow inlet 10 and the communication port 9 are correspondingly provided, and the centerline of the airflow inlet 10 is the same as the centerline of the handle assembly 2.
  • the notch 701 is located above the axis (a-a ') of the cylindrical wall 8, so that the airflow of the vertical section 601 enters the axial section 602 and most of the airflow is directly blown out from the air outlet, reducing the loss of air volume and pressure ; At the same time, it is conducive to rapid hair drying; and further, the gap 701 is opposite to the airflow inlet 10. Further, the notch barrel 7 is provided with a perforation 702 that allows the airflow of the main air duct 6 to enter the notch barrel 7. The perforation 702 is located below the axis of the cylindrical wall 8 and is opposite to the airflow inlet 10. The advantage is that: The air flow of the vertical section 601 enters the inside of the notch barrel 7 through the shortest distance, reducing the loss of air volume.
  • the fan unit 22 is provided in the handle assembly 2, the cylindrical wall 8 is provided with an airflow inlet 10, the airflow in the handle assembly 2 enters the housing 1 from the airflow inlet 10, and the gap 701 and The airflow inlet 10 is staggered.
  • the notch barrel 7 is provided with a perforation 702 opposite to the airflow inlet 10, the airflow enters the interior of the notch barrel 7 through the perforation 702, the airflow can promote the airflow at the notch 701, and the notch 701 The collected air flow is blown out from the air outlet 5 to take away heat.
  • the fan unit 22 is provided in the handle assembly 2, the air inlet 4 is provided in the handle assembly 2, and the handle assembly 2 is further provided with a main air duct 6.
  • the air duct 23 may define part of the main air duct 6 or all of the main air duct 6.
  • the air duct 23 is preferably made of soft rubber, such as silica gel. The advantage is that the airflow sucked into the main air duct 6 by the fan unit 22 yuan is directly transmitted through the air duct 23. On the one hand, the air duct 23 forms a seal, and the probability of the air flow of the main air duct 6 being leaked from the assembly gap is reduced.
  • the air duct 23 can also react to the sound of the main air duct 6 It acts as a buffer to reduce noise and shock.
  • the main air duct 6 includes a vertical section 601 located in the handle assembly 2 and an axial section 602 located in the housing 1 and at an angle to the vertical section 601.
  • the vertical section 601 communicates with the axial section 602 through the airflow inlet 10, and the wind guide tube 23 defines the vertical section 601.
  • the air flow drawn by the fan unit 22 from the air inlet 4 into the handle assembly 2 is defined by the air guide tube 23 to enter the axial section 602, and the air guide tube 23 forms a seal to prevent the air flow from leaking from the assembly gap of the handle assembly 2 and reduce Air volume and air pressure loss generated during air flow transportation.
  • the air duct 23 extends from the bottom to the airflow inlet 10.
  • the advantage is that the main air duct 6 is a non-linear air duct.
  • the air duct 23 extends to the airflow inlet so that the airflow of the vertical section 601 is sent to the axial section 602 by the air duct 23, reducing the air volume and air pressure loss caused by the airflow reversal.
  • the air guide pipe 23 extends upward from the air inlet 4, the air guide pipe 23 may also extend upward from below the air inlet 4, at this time, the air guide pipe A perforation is provided on the position corresponding to the air inlet 4 on the 23 to allow airflow to enter the air duct 23; when the air inlet 4 is provided on the side wall of the handle assembly 2 and the bottom of the handle assembly 2, the air duct is preferred 23 extends upward from the side wall air inlet 4 to obtain a larger air intake.
  • the air duct 23 can also extend upward from the side wall air inlet 4.
  • the air duct 23 is provided corresponding to the side wall air inlet 4
  • a perforation is provided at the location to allow airflow to enter the air duct 23 from the air inlet 4 of the side wall; when the air inlet 4 is provided at the bottom of the handle assembly 2, the lower end of the air duct 23 is located above the air inlet 4.
  • the lower end of the air duct 23 may be open, so that as much airflow as possible enters the interior of the air duct 23; the lower end of the air duct 23 may also be covered
  • the bottom of the handle assembly 2 and the lower end corresponding to the air inlet 4 are provided with perforations so that the airflow enters the air guide tube 23.
  • the air duct 23 extends to the airflow inlet 10, which may be the location where the air duct 23 extends exactly to the airflow inlet 10, that is, it can be understood that the upper end of the side wall of the air duct 23 surrounds the airflow inlet 10; It may be that the upper end of the air duct 23 extends to the vicinity of the airflow inlet 10 and there is a height difference with the airflow inlet 10 (the upper end of the air duct 23 is slightly lower or slightly higher than the airflow inlet 10).
  • the distance between the upper end of the air duct 23 and the airflow inlet 10 is L, 0mm ⁇ L ⁇ 20mm, the advantage is to prevent the airflow from leaking from the gap of the handle assembly 2 to cause the reduction of wind pressure and air volume; when L> 20mm, the handle The assembly gap of the assembly 2 may cause the airflow to leak out, resulting in reduced wind pressure and volume.
  • the upper end of the air duct 23 is flush with the airflow inlet 10 or slightly lower.
  • L 0mm.
  • L can also be 5mm, 8mm, 10mm, 15mm.
  • the casing 1 is provided with a cylindrical wall 8 defining an axial section 602.
  • the end of the air duct 23 near the cylindrical wall 8 has a flange 2301.
  • the flange 2301 is located between the cylindrical wall 8 and the housing 1.
  • the flanging 2301 is a portion of the top of the air guide tube 23 extending outward along its axis, and is pressed by the outer wall of the cylindrical wall 8 and the inner wall of the housing 1 to fix the air guide tube 23 so that when the hair dryer is working
  • the air duct 23 is displaced, to ensure that the airflow is delivered to the axial section 602, and to reduce the air volume and wind pressure loss.
  • the air duct 23 is sleeved on the fan unit 22.
  • the fan unit 22 may be completely located in the air duct 23, or may be partially located in the air duct 23.
  • the advantage is that the airflow sucked by the fan unit 22 directly enters the air guide pipe 23, reducing the wind resistance, thereby reducing the air volume and wind pressure loss.
  • the handle assembly 2 includes a fixing bracket 201 for fixing the fan unit 22 and an outer handle 202 sleeved on the outside thereof, the fixing bracket 201 is connected to the housing 1, and the handle assembly 2 Separated from the housing 1 set.
  • the side wall of the fixing bracket 201 is provided with a clamping slot 24 for fixing the fan unit 22, and the air guiding tube 23 is clamped into the clamping slot 24.
  • the air duct 23 reduces the vibration felt when the handle assembly 2 is held by a human hand, and improves the fixing reliability of the fan unit 22; on the other hand, it reduces noise.
  • the slot 24 may be formed by the inner side wall of the fixed bracket 201 being recessed outward in a direction away from the axis thereof; or the inner side wall of the fixed bracket 201 may be provided with a rib extending toward the axis, the rib and the inner side wall of the fixed bracket 201 Formation card slot 24.
  • the air inlet 4 is provided on the outer handle 202 and located below the fan unit 22.
  • the air inlet 4 is elongated and has a plurality of distributions around the axis of the handle assembly 2.
  • the outer handle 202 includes a first outer handle 2021 and a second outer handle 2022 that are detachably arranged up and down.
  • the first outer handle 2021 is located above the second outer handle 2022, and the air inlet 4 is provided at the second On the outer handle 2022.
  • the first outer handle 2021 and the second outer handle 2022 are both cylindrical, and the elongated air inlet 4 is evenly distributed on the side wall of the second outer handle 2022.
  • the length of the first outer handle 2021 is greater than the length of the second outer handle 2022.
  • the first outer handle 2021 and the second outer handle 2022 are fitted through a spin fastener.
  • the fixing bracket 201 includes a first portion 2011 that extends along the axis direction and has an opening 2014 perpendicular to the axis direction of the fixing bracket 201.
  • a ring-shaped connecting portion 2013 for connecting to the housing 1 is provided.
  • the ring-shaped connecting portion 2013 and the housing 1 are connected by screws 32.
  • the fan unit 22 is provided in the opening 2014, and the fan unit 22 is fixed by the outer handle 202 and the fixing bracket 201; the inner side wall of the outer handle 202 is provided with a plurality of ribs 2023, a plurality of ribs 2023 and the fan unit 22 Interference fit, furthermore, a plurality of ribs 2023 fixes the fan unit 22 by pressing the air duct 23 and cooperating with the fixing bracket 201.
  • the outer handle 202 has a cylindrical shape, and the upper end of the outer handle 202 is disposed around the ring-shaped connecting portion 2013 and covers the connection between the ring-shaped connecting portion 2013 and the housing 1.
  • the upper end of the outer handle 202 is provided with a buckle 26, and the casing 1 is provided with a buckle hole 27 that cooperates with the buckle 26; the buckle 26 and the buckle hole 27 are provided with a plurality of and spaced evenly, the buckle 26 extends into the card hole 27, narrowing the gap between the upper end of the outer handle 202 and the housing 1.
  • the upper end of the outer handle 202 abuts the housing 1, and the lower portion of the outer handle 202 is connected to the fixing bracket 201.
  • a groove 25 is provided at the position where the housing 1 abuts the outer handle 202, and the groove 25 has a ring shape. The upper end of the housing 1 extends into the groove 25, so that the surface of the housing 1 has no steps, the surface is smooth, and more beautiful.
  • the motor 2201 further includes a frame 2202, the fan blade 2203 is disposed in the frame 2202, and the air duct 23 is sleeved on the frame.
  • the motor 2201 drives the fan blade 2203 to rotate and draws airflow from the air inlet 4, and the airflow enters the air guide pipe 23 through the inside of the frame, that is, the frame has its own air duct.
  • the frame can be completely located in the air duct 23, or it can be partially located in the air duct 23.
  • the length of the frame is La
  • the length of the frame in the air duct 23 is Lb, 1 / 2 ⁇ Lb / La ⁇ 1
  • the benefits are Improve the reliability of the air duct 23 on the frame; when Lb / La ⁇ 1/2, the air duct 23 is easy to fall off the frame, increasing the difficulty of assembly, and the unreliable cooperation between the air duct 23 and the frame may be Causes airflow leakage, resulting in loss of air volume and pressure.
  • the electric hair dryer further includes a filter mesh 28, which is in a sheet shape and is located above the air inlet 4, the filter mesh 28 is arranged perpendicular to the axis of the handle assembly 2, in this example, the filter mesh 28 is preferably a plastic mesh, Or metal mesh.
  • the hair dryer further includes a wire guard 30 for protecting electric wires.
  • a hollow cylindrical portion 29 is provided below the fixing bracket 201.
  • the wire guard 30 passes through the hollow cylindrical portion 29.
  • the wire protector 30 is preferably made of soft rubber material, in this case, silicone material, and the cable 31 passes through the wire protector 30 to prevent the friction between the cable 31 and the hard handle assembly 2 to cause damage to the cable 31, resulting in safety problems such as leakage and extended use. life.
  • the hollow cylindrical portion 29 includes a first C-shaped post 2901 and a second C-shaped post 2902, the first C-shaped post 2901 is connected to the first portion 2011 of the fixed bracket 201, and the second C-shaped post 2902 and the first outer
  • the handle 2021 is connected, and when the first outer handle 2021 is sleeved on the fixing bracket 201 in this example, the first C-shaped post 2901 and the second C-shaped post 2902 are snap-fitted to form a hollow post mounting portion.
  • the first C-shaped post 2901 may be provided integrally with the fixing bracket 201, or may be provided separately.
  • the second C-shaped post 2902 and the first outer handle 2021 may be provided integrally or separately.
  • the fixing bracket 201 further includes a second portion 2012 extending along the axis direction thereof, and the fan unit 22 is provided in the opening 2014, so The second part 2012 is connected to the first part 2011 to cover the opening 2014 to fix the fan unit 22; in this example, the air duct 23 is sleeved on the fan unit 22 and then placed in the first part 2011, Fasten the second part 2012 and the first part 2011, and then put on the outer handle 202; furthermore, the two-half fixed bracket 201 can be connected by screws 32, that is, the first part 2011 and the second part 2012 are connected by screws 32 are connected together to achieve fixed reliability.
  • the card slot 24 may be provided only on the first part 2011, or may be provided on the second part 2012 at the same time, which makes the fixing more reliable and reduces vibration and noise.
  • the first outer handle 2021 and the fixing bracket 201 and the connection reliability of the outer handle 202 and the housing 1 are connected by screws 32 at the lower end.
  • the difference between the third embodiment and the first embodiment is that the first outer handle 2021 and the fixing bracket 201 are connected by a screw 32 at the lower end. Furthermore, the first outer handle 2021 and the first part 2011 of the fixing bracket 201 are connected by a screw 32 at the lower end .
  • the handle assembly 2 includes a fixing bracket 201 for fixing the fan unit 22 and an outer handle 202 sleeved on the outside thereof, and the air duct 23 is located on the fixing bracket 201 and the outer handle Between 202 and sleeved on the fixed bracket 201, the fan unit 22 is disposed in the fixed bracket 201.
  • Embodiment 5 The difference between Embodiment 5 and Embodiment 1 is that the filter screen 28 is cylindrical and integrally formed with the outer handle 202 by injection molding.
  • the filter screen 28 is provided at the air inlet 4.
  • the filter screen 28 is preferably nylon network.
  • the center line of the outer shell, the axis of the outer shell, the center line of the inner barrel, the axis of the inner barrel, the center line of the notch barrel, and the axis of the notch barrel are the same.

Landscapes

  • Cleaning And Drying Hair (AREA)

Abstract

本发明涉及家用电器领域，为了解决现有技术中电吹风开机瞬间的风量和风压过大，给用户惊吓的问题，提供一种电吹风，包括外壳、与外壳连接的手柄组件、风扇单元、加热单元、进风口和出风口；所述风扇单元用于抽吸气流从进风口进入电吹风并从出风口吹出形成主风道，所述加热单元用于加热该气流；所述风扇单元包括扇叶和用于驱动该扇叶旋转的电机；其中，所述主风道包括沿外壳的轴线方向延伸的轴向区段，所述外壳内设有具有缺口的缺口筒，所述缺口沿外壳的轴线方向延伸，所述缺口筒与外壳内部的筒状壁限定所述轴向区段。使电吹风在开机瞬间的风量和风压较小，给用户心理准备，然后风量和风压逐渐变大且趋于恒定便于快速烘干头发的电吹风。

Description

电吹风
交叉引用
本公开要求于2018年11月08日提交的申请号为201811321728.9、名称为“一种电吹风”，以及于2018年11月17日提交的申请号为201811370145.5、名称为“一种电吹风”的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本发明涉及家用电器领域，尤其涉及一种电吹风。
背景技术
现有技术中，电吹风包括外壳、导管，通过风扇单元抽吸进入电吹风内的气流包括在外壳和导管之间延伸的轴向区段，该气流大致呈环形，此种方式有利于外壳内的气流沿着外壳和导管的侧壁的导向快速的从电吹风吹出。但是此种方式，吹风机通电后，风扇单元抽吸进入电吹风内的气流会迅速的吹出，如果在使用时，出风口的位置正对人脸，电吹风吹出的气流扑面而来，尤其是大风量、大风压的电吹风，会使人受到惊吓、在气流的作用下暂时屏住呼吸；或者，在使出风口对准头发(长发女生可能先从发梢吹起)、头皮时，电吹风开机后，大风压的气流瞬间吹向头发、头皮，使头发、头皮瞬间承受较大的力，引起不适。先开小风档位，再切换成大风档位，操作又比较麻烦。而且，如果风量和风压较小，有会使头发烘干效率降低。大的风压虽然可以在吹发过程中快速打散湿发，但是随着水分的逐渐蒸发，头发越来越轻，头发在风力的作用下飘扬角度很大，容易凌乱，由大风档位切换成小档位又多了一个调节步骤，比较麻烦。
现有技术中，电吹风包括风扇单元、加热单元、外壳、手柄组件，手柄组件和外壳连接，风扇单元设于手柄组件内或者外壳内，加热单元设于外壳内，加热单元从设于手柄组件上的进风口或者设于外壳上的进风口抽吸气流进入外壳内，加热单元用于加热该气流，加热单元产生的热量如果不及时散出会导致加热单元发红，产生安全事故。
发明内容
本发明要解决的技术问题是提供一种电吹风，通过优化风道结构，提供一种能够在同一档位下开机瞬间风量、风压较小，随着开机时间的延长，风量、风压逐渐变大、稳定的一种电吹风，通过优化出风口提供一种能够在同一档位下通过手动改变电吹风出风口距离头发表面的距离即可调节风压大小的电吹风，通过优化发热架的结构，使电吹风内的热量能够及时散出，使用安全，给用户良好的使用体验。
一种电吹风，包括外壳，与外壳连接的手柄组件、风扇单元、加热单元、进风口和出风口；
所述风扇单元用于抽吸气流从进风口进入电吹风并从出风口吹出形成主风道，所述加热单元用于加热该气流；
所述风扇单元包括扇叶和用于驱动该扇叶旋转的电机；
其中，所述主风道包括沿外壳的轴线方向延伸的轴向区段，所述外壳内设有具有缺口的缺口筒，所述缺口筒与外壳内部的筒状壁限定所述轴向区段。
好处是，通过缺口筒的设置使轴向区段的气流在缺口处汇聚，增加轴向区段的储风体积，在电吹风启动瞬间，气流被风扇单元抽吸进入轴向区段且部分气流逐渐在缺口处汇聚或者通过缺口进入缺口筒的内部，其余气流沿缺口筒的外侧壁和筒状壁限定的方向从出风口吹出，使的电吹风启动瞬间风压、风量相对较小；电吹风启动完成，缺口处的气流/或者缺口筒内部空间被填满以后，此部分气流会在轴向区段的其余气流的带动下从出风口吹出，提高风压和风量，且缺口处的储存的气流能够平衡出风口处的风量和风压，使从出风口处吹出的风量和风压相对恒定。
优选的，所述缺口沿缺口筒的轴线方向延伸，所述缺口的长度与缺口筒的长度之比不小于1/2。
好处是，形成适当的储风区域，对电吹风启动瞬间的风量和风压进行缓冲。当两者长度之比小于1/2时，对电吹风启动瞬间的风量和风压的缓冲效果不明显。
优选的，所述手柄组件与外壳连接处形成使两者连通的连通口，所述缺口延伸至连通口的上游侧。
好处是，既能对电吹风启动瞬间的风量和风压进行缓冲，又不至于损失较多的风量和风压。
优选的，所述手柄组件与外壳连接处形成使两者连通的连通口，所述缺口延伸至/越过连通口的下游侧；或者所述缺口延伸至连通口的上游侧和下游侧之间。
好处是，增大储风区域面积，对电吹风启动瞬间的风量和风压进行缓冲。
优选的，所述连通口与缺口错开设置。
好处是，使连通口处的气流进入轴向区段，增大风量和风压。
优选的，所述缺口位于外壳轴线的上方。
好处是，当使用电吹风吹发时，外壳轴线上方的位置较其下方的位置相对远离头皮表面，出风口对应内部缺口的设置位置处风压和风量相对较小，使出风口风压和风量较大的位置较长时间对着头发，有利于快速烘干头发。
优选的，所述缺口筒上设有使主风道的气流进入缺口筒的穿孔，所述穿孔和缺口的投影至少部分重合；
或者，所述缺口筒上设有使主风道的气流进入缺口筒的穿孔，所述穿孔位于缺口起始端的上游侧，且两者相对设置。
一种电吹风，包括外壳、与外壳连接的手柄组件、风扇单元、加热单元、进风口和出风口；
所述风扇单元用于抽吸气流从进风口进入电吹风并从出风口吹出形成主风道，所述加热单元用于加热该气流；
所述风扇单元包括扇叶和用于驱动该扇叶旋转的电机；
其中，所述主风道包括沿外壳的轴线方向延伸的轴向区段，所述加热单元设置在所述轴向区段中，所述加热单元包括缺口筒，所述缺口筒具有沿其轴线方向延伸的缺口，所述缺口筒与外壳内部的筒状壁限定所述轴向区段。
好处是，通过缺口筒的设置，使气流能够暂时汇集在外壳的内部，使气流与加热单元有足够的时间进行热量传输，然后再其他气流的带动下从出风口吹出，降低发热丝发红的概率，使用更加安全。
优选的，所述加热单元还包括安装在缺口筒上的多个云母片、绕制在多个云母片上的发热丝，所述多个云母片至少设于缺口的两侧，所述发热丝至少绕制在所述缺口筒的外侧壁的上方。
好处是提高云母片的安装可靠性，防止云母片脱离安装位置导致风阻变大，导致风量损失。所述发热丝至少绕制在所述缺口筒的外侧壁的上方有两种可能，所述发热丝环绕整圈；好处是提高发热功率；或者所述发热丝仅绕制在缺口筒的上方，所述缺口敞开。减轻加热单元的重量。
优选的，所述多个云母片中的至少一个对应所述缺口设置，且该云母片具有朝向缺口且沿缺口筒轴向延伸的悬空端。
好处是，对发热丝进行支撑，防止在缺口处的发热丝变形。
优选的，所述缺口筒包括轴向延伸的第一部分，所述缺口设于第一部分，所述云母片与第一部分卡接，且所述多个云母片均匀间隔设置。
好处是，对安装支架进行支撑，防止安装支架变形，进而导致加热单元变形。
优选的，所述缺口筒还包括在第一部分后端沿第一部分的周向向外延伸的第二部分，所述云母片的后端与第二部分的内侧面相抵靠。
好处是，提高云母片固定的可靠性。
优选的，所述云母片的后端具有卡槽，所述卡槽与第二部分的周缘相抵靠。
好处是，提高云母片固定的可靠性。
一种电吹风，包括外壳，与外壳连接的手柄组件、风扇单元、加热单元、进风口和出风口；
所述风扇单元用于抽吸气流从进风口进入电吹风并从出风口吹出形成主风道，所述加热单元用于加热该气流；
所述风扇单元包括扇叶和用于驱动该扇叶旋转的电机；
其特征在于，所述主风道包括沿外壳的轴线方向延伸的轴向区段，所述外壳内设有具有缺口的缺口筒，所述缺口沿外壳的轴线方向延伸，所述出风口位于轴向区段端部的非闭合缝隙，所述非闭合缝隙由缺口筒和外壳内部的筒状壁限定。
好处是，从非闭合缝隙吹出的气流能带动非闭合缝隙的非闭合处气流的流动，两股气流具有一交汇点，当出风口到头发表面的距离大于交汇点到出风口的距离时，两股气流混合后能够起到降低风压的作用，当吹长发时，不容易将头发吹的飘扬角度过大，吹发过程中以及吹完后比较凌乱；当头发较短时，对发根施加的力度较小，当用户只需要将头发进行吹干而不需要造型时，长时间吹向一个方向也不会改变发根原来的朝向，使吹完后的头发更容易打理；当出风口到头发表面的距离小于交汇点到出风口的距离时，两股气流分别到达头发表面，风压较大，能够吹散湿发，增大热风与头发的接触面积，快速烘干头发。通过改变出风口到头发表面的距离即可调节风压，达到不同的吹发效果，不需要通过调节档位按钮，更加方便。
优选的，所述开放部位于非闭合缝隙中心线的一侧。
好处是，使非闭合缝隙绕其中心线设置，非闭合缝隙的中心在其内侧，使从出风口吹出的主风道气流和由该股气流带动的开放部处的气流形成整圈，按照用户吹头发时出风口与头发的距离，这两股气流会在到达头发前汇成一股，提高吹发效果。
优选的，所述开放部位于外壳中心线的上方。
好处是，根据用户在吹发过程中手拿电吹风的习惯，外壳中心线下方的区域是在整个吹发过程中始终起主要作用的部分，开放部处的气流主要由从出风口吹出的主风道气流带动产生，风量和风压都相对较小，如果用户习惯将电吹风的出风口靠近头发吹，那么两股气流在还没有汇成一股前就到达头发表面，开放部位于外壳中心线的上方有利于使较大风压、较多气流吹向头发，达到快速烘干头发的目的。
优选的，所述开放部的两端位于手柄组件中心线的两侧。
好处是将开放部设于在吹发过程中相对较多时间远离头发表面的位置，有利于使较大风压、较多气流吹向头发，达到快速烘干头发的目的。
优选的，所述开放部与缺口朝向同一方向。
优选的，所述轴向区段由缺口筒和外壳内部的筒状壁限定，所述非闭合缝隙由缺口筒和筒状壁限定。
好处是，通过缺口筒和筒状壁的配合限定出非闭合缝隙，将轴向区段的气流从该非闭合缝隙吹出，且能带动非闭合缝隙的非闭合处气流的流动，两股气流具有一交汇点，当出风口到头发表面的距离大于交汇点到出风口的距离时，两股气流混合后能够起到降低风压的作用；当出风口到头发表面的距离小于交汇点到出风口的距离时，两股气流分别到达头发表面，风压较大。通过改变出风口到头发表面的距离即可调节风压，达到不同的吹发效果。
优选的，所述电吹风还包括封闭部，所述封闭部封闭缺口筒和筒状壁之间的部分缝隙以形成所述非闭合缝隙。
好处是，结构简单，装配方便。
附图说明
通过参照附图详细描述其示例实施方式，本发明的上述和其它特征及优点将变得更加明显。
图1为本发明所述电吹风的整机结构示意图。
图2为本发明所述一示例中图1中S所指的剖视图1。
图3为本发明所述又一示例中图1中S所指的剖视图2。
图4为本发明所述另一示例中图1中S所指的剖视图3。
图5为本发明所述一示例中缺口筒的结构示意图。
图6为本发明所述缺口筒的另一角度结构示意图。
图7为本发明所述缺口筒的又一角度结构示意图。
图8为本发明所述出风口的结构示意图。
图9为本发明所述出风口的另一角度的结构示意图。
图10为本发明所述缺口筒另一结构的示意图。
图11为本发明所述缺口筒又一结构的示意图。
图12为本发明所述缺口筒再又一结构的示意图。
图13为本发明所述出风口的又一结构示意图。
图14为本发明所述非封闭管道的结构示意图。
图15为本发明所述加热单元的结构示意图。
图16为本发明一示例中所述电吹风的整机结构示意图。
图17为本发明一示例中所述电吹风的局部剖视图。
图18为图17中A的放大图。
图19为图17中B的放大图。
图20为本发明一示例中所述手柄组件的剖视图。
图21为本发明一示例中所述手柄组件的爆炸图。
图22为本发明一示例中所述外手柄的结构示意图。
图23为本发明一示例中所述手柄组件的又一角度剖视图。
图24为本发明又一示例所述手柄组件的爆炸图。
图25为本发明又一示例所述手柄组件的剖视图。
图26为图25中C的放大图。
图中所标各部件名称如下：
1、外壳；2、手柄组件；201、固定支架；2011、第一部分；2012、第二部分；2013、环状连接部；2014、敞口；202、外手柄；2021、第一外手柄；2022、第二外手柄；2023、筋条；3、加热单元；301、云母片；3011、悬空端；302、发热丝；4、进风口；5、出风口；6、主风道；601、竖直区段；602、轴向区段；7、缺口筒；701、缺口；702、穿孔；703、第二缺口；8、筒状壁；9、连通口；10、气流入口；11、辅助出风口；12、开放端；13、开放部；14、延伸部；15、第二缺口；16、开口；17、出风构件；171、阻隔件；172、外圈；173、筋条；18、非封闭管道；19、第一部分；20、第二部分；21、阻隔片；22、风扇单元；2201、电机；2202、框架；2203、扇叶； 23、导风管；2301、翻边；24、卡槽；25、凹槽；26、卡扣；27、卡孔；28、过滤网；29、中空柱状部；2901、第一C型柱；2902、第二C型柱；30、护线套；31、电缆；32、螺丝。
具体实施方式
下面结合附图对本发明的内容进行详细描述。
实施例一：
如图1至21所示，一种电吹风，包括外壳1、与外壳1连接的手柄组件2、风扇单元22、加热单元3、进风口4和出风口5；
所述风扇单元22用于抽吸气流从进风口4进入电吹风并从出风口5吹出形成主风道6，所述加热单元3用于加热该气流；
所述风扇单元22包括扇叶2203和用于驱动该扇叶2203旋转的电机2201；
其中，所述主风道6包括沿外壳1的轴线方向延伸的轴向区段602，所述外壳1内设有具有缺口701的缺口筒7，所述缺口筒7与外壳1内部的筒状壁8限定所述轴向区段602。轴向区段602的气流流向如2、3、4中箭头所指。
风扇单元22可以设置在外壳1内，此时，进风口4位于外壳1的后端，第一处风口位于外壳1的前端，加热单元3设于外壳1内，且位于轴向区段602中；风扇单元22也可以设置于手柄组件2内，此时，进风口4设置于手柄组件2上，且进风口4位于风扇单元22的下方，出风口位于外壳1的前端，加热单元3可以设置与外壳1内，且位于轴向区段602中，也可以设置在手柄组件2内。
如图2、3、4所示，外壳1内部的筒状壁8可以是外壳1的内侧壁，主风道6的轴向区段602由外壳1的内侧壁和缺口筒7的外侧壁限定；也可以是外壳1内设置的内筒，是一个单独的构件，主风道6的轴向区段602由内筒的内侧壁和缺口筒7的外侧壁限定。
通过该缺口701的设置，使得在电吹风启动的瞬间，轴向区段602的部分气流在该缺口701处汇集和储存、或者轴向区段602的气流通过缺口701进入缺口筒7的内部空间，其余气流沿着筒状壁8与缺口筒7外侧壁限定的空间延伸并从出风口吹出，因而降低启动瞬间的风量和风压；随着电吹风工作时间的加长，缺口701处或者缺口筒7内的气流逐渐汇集直到饱和，风量和风压也逐渐提高、逐渐恒定，提高用户体验。
下面对缺口701进行具体的描述，如图5所示，所述缺口701沿缺口筒7的轴线 (b-b’)方向延伸，所述缺口701的长度与缺口筒7的长度之比不小于1/2，缺口701的长度为L1，缺口筒7的最大长度B。缺口701可以自缺口筒7的上游端部开始延伸，也可以自靠近上游端部的位置进行延伸。本发明中“上游”是指靠近外壳1后端位置，“下游”是指远离外壳1后端的位置。本例中，缺口701的长度与缺口筒7的长度之比为0.95。增加储风区域面积，有效对电机2201启动瞬间的风量和风压进行缓冲。
如图6所示，所述缺口701的中心角为α，15°≤α≤180°，好处是既能对电吹风启动瞬间的风量和风压起到缓冲，又能保证风压和风量的损失不严重，快速烘干头发；当α＜15°时，缺口701太小，对电吹风启动瞬间的风量和风压的缓冲效果不明显；当α＞180°时，缺口701太大，使大量的气流积聚在外壳1内不能及时从出风口吹出，使风量损失严重。更加进一步的，15°≤α≤90°，其中优选30°≤α≤60°，本例中α＝45°。中心角α是形成缺口701的两端到缺口筒7轴线的最长的两条线所形成的夹角。
如图2、3、4所示，所述手柄组件2与外壳1连接处形成使两者连通的连通口9，所述缺口701延伸至连通口9的上游侧；或者，所述手柄组件2与外壳1连接处形成使两者连通的连通口9，所述缺口701延伸至/越过连通口9的下游侧；或者所述缺口701延伸至连通口9的上游侧和下游侧之间。本例中，缺口701越过连通口9的下游侧。
所述连通口9与缺口701错开设置，本发明中的“错开”是指缺口701的边缘均与连通口9错开，缺口筒7上到达连通口9距离最短的为缺口筒7的侧壁。所述缺口701位于外壳1轴线的上方，更进一步的，缺口701关于手柄组件2的轴线对称设置。
如图3至7所示，所述缺口筒7上设有使主风道6的气流进入缺口筒7的穿孔702，所述穿孔702和缺口701的投影至少部分重合。穿孔702和缺口701的轴线的投影平行或重合，优选缺口701的投影覆盖穿孔702的投影，即穿孔702和缺口701的轴线的投影重合。本例中缺口701的轴线与缺口筒7的轴线(b-b’)平行。
进一步的，如图5所示，穿孔702宽度可以与缺口701的宽度相同；或者，穿孔702的宽度小于缺口701的宽度；或者，穿孔702的宽度大于缺口701的宽度。本例中，穿孔702的宽度小于缺口701的宽度。穿孔702的宽度为K1，是指沿垂直于缺口筒7轴线的方向投影，垂直于缺口筒7轴线的最大宽度；穿孔702的长度为K2，是指沿垂直于缺口筒7轴线的方向投影，平行于缺口筒7轴线的最大长度。
进一步的，穿孔702的长度小于缺口701的长度，从而降低风量、风压的损失。
进一步的，穿孔702的中心线(kc-kc’)与手柄组件2的中心线的投影平行或重 合。可以理解的，穿孔702的中心线与手柄组件2中心线的投影相交。
进一步的，所述穿孔702位于筒状壁8轴线的下方且与气流入口10相对设置。
进一步的，所述缺口筒7的前端设有一辅助出风口11，所述缺口筒7内的气流从该辅助出风口11吹出，好处是增大风量和风压。
可以理解的，所述缺口筒7上设有使主风道6的气流进入缺口筒7的穿孔702，所述穿孔702位于缺口701起始端的上游侧，且两者相对设置。
另一示例，所述缺口701为使气流进入缺口筒7内的穿孔702。
如图8至14所示，所述出风口5为位于轴向区段602端部的非闭合缝隙。本发明中，“非闭合缝隙”是指出风口5作为一个整体具有两个开放端12、且开放端12之间形成的区域(称之为开放部13)不用于主风道6的轴向区段602气流的吹出的狭长的缝隙。非闭合缝隙可以是一个连续的用于主风道6轴向区段602的气流吹出的缝隙；也可以是多个小的用于主风道6轴向区段602的气流吹出的缝隙组合而成(即可以看成是一个连续的缝隙中间通过筋条173打断以增加强度)，第一个小缝隙的起始端和最后一个小缝隙的末端之间形成开放部13开放端12之间可以是实体、也可以为其他形态。
通过使出风口5为“非闭合狭缝”好处是从出风口5吹出的气流的风压较大，该部分气流带动非闭合狭缝的开放部13的气流流动，该股气流风压较小，在电吹风外部距离出风口5一定距离且未到达头发表面前两股气流汇聚成一股气流，适当降低风压，当吹长发时，不容易将头发吹的飘扬角度过大，吹发过程中以及吹完后比较凌乱；当头发较短时，对发根施加的力度较小，当用户只需要将头发进行吹干而不需要造型时，长时间吹向一个方向也不会改变发根原来的朝向，使吹完后的头发更容易打理。
如图9所示，所述非闭合缝隙具有开放部13，所述开放部13的中心角β，15°≤β≤180°，好处是，既能使到达头发的风压降低、气流及时从外壳1内吹出，又不至于使风压产生较大损失；当β＜15°时，风压降低效果不明显，头发容易被吹的凌乱，如果为了吹干头发长时间对着发根吹，容易使发根得到不想要的走向；当β＞180独时，出风口5太小，容易使气流积聚在外壳1内部能及时从出风口5吹出，造成风量损失。中心角β是指开放部13的两端(即非闭合缝隙的起始端和末端)与非闭合缝隙的中心的连线所成的夹角；如果开放部13的两端具有一定的宽度或端部的形状不规则，则为该两端部上分别与非闭合缝隙的中心连线长度最小的两条线所成的角度。进一步的，15°≤β≤90°，优选β＝45°。中心角β是指开放端12到非闭合缝隙中心线的 最长的两条线所形成的夹角。非闭合缝隙的中心线和缺口701缺口筒7的轴线相同。主风道6的气流部从开放部13吹出。
所述开放部13位于非闭合缝隙中心线的一侧，此种情形说明非闭合缝隙绕其中心线设置，非闭合缝隙的中心在其内侧，使从出风口5吹出的主风道6气流和由该股气流带动的开放部13处的气流形成整圈，按照用户吹头发时出风口5与头发的距离，这两股气流会在到达头发前汇成一股，提高吹发效果。
所述开放部13位于外壳1中心线的上方。根据用户在吹发过程中手拿电吹风的习惯，外壳1中心线下方的区域是在整个吹发过程中始终起主要作用的部分，开放部13处的气流主要由从出风口5吹出的主风道6气流带动产生，风量和风压都相对较小，如果用户习惯将电吹风的出风口5靠近头发吹，那么两股气流在还没有汇成一股前就到达头发表面，开放部13位于外壳1中心线的上方有利于使较大风压、较多气流吹向头发，达到快速烘干头发的目的。
所述开放部13的两端位于手柄组件2中心线的两侧。开放部13的两端可以关于手柄组件2中心线的两侧对称也可以不对称。
如图9所示，所述非闭合的投影由多个曲线首尾相接围成，即非闭合缝隙由多个构件限定。进一步的，所述外壳1内设有缺口筒7，所述轴向区段602由缺口筒7和外壳1内部的筒状壁8限定，所述非闭合缝隙由缺口筒7和筒状壁8限定。所述缺口701沿外壳1的轴线方向延伸，缺口701可以从缺口筒7的上游端向其下游延伸，也可以自缺口筒7的下游端向其上游延伸。非闭合缝隙的其中一个示例，所述筒状壁8上设有向下延伸的延伸部14，所述延伸部14封闭缺口筒7和筒状壁8之间的部分缝隙以形成所述非闭合缝隙，一种情况，缺口筒7和筒状壁8之间的缝隙为环形，延伸部14封闭该环形缝隙的一部分得到该非闭合缝隙，延伸部14与缺口筒7的外侧壁相抵靠，开放部13为所示延伸部14。该非闭合缝隙呈C型、U型等相近形状；另一种情况，如图10所示，所述缺口701设于缺口筒7的前端，所述延伸部14封闭所述缺口701的至少一部分，该非闭合缝隙呈C型、U型等相近形状。进一步的，所述述缺口701自缺口筒7的前端向后延伸，所述缺口701的长度与缺口筒7的长度之比不小于1/2。所述延伸部14封闭所述缺口701，使轴向区段602的气流到达所述非封闭缝隙前的形状与其大致相同，使轴向区段602的气流沿着延伸部14的侧壁、缺口筒7侧壁及筒状壁8的限定迅速从出风口5吹出，气流不会积聚在外壳1内，减小风量损失。
又一种示例，如图11、12所示，所述缺口筒7的前端设有与缺口701间隔设置的第二缺口15703701，所述延伸部14封闭所述第二缺口15703701以形成所述非闭合缝隙。所述非封闭缝隙具有开放部13，所述开放部13与缺口701朝向同一方向，开放部13为第二缺口15703701，较佳的，开放部13与缺口701的相同轴线，好处是，减小风量损失。
又一种示例，如图13所示，所述外壳1的端部具有开口16，所述开口16内设有出风构件17，所述出风构件17包括位于中部的阻隔件171和位于外部的外圈172，外圈172和阻隔件171通过筋条173连接，所述非闭合缝隙由外圈172和阻隔件171限定。或者，所示外壳1内还设有内筒，上述出风构件17安装在内筒上。
又一种示例，所述筒状壁8内设有阻隔件171，所述阻隔件171和筒状壁8通过筋条173连接，所述非闭合缝隙由筒状壁8和阻隔件171限定。
可以理解的，所述轴向区段602的气流包括在到达非闭合缝隙前呈环形的气流，该环状气流从非闭合缝隙吹出；在该种情况下，外壳1内设有内筒，该环状气流由内筒的外侧壁和外壳1内部的筒状壁8限定。
如图14所示，所述非闭合缝隙的投影由单个闭合曲线围成，即，非闭合缝隙由一个构件限定。更加具体的，所述外壳1内设有非封闭管道18，所述与非闭合缝隙形状相同的气流由非封闭管道18限定，所述非闭合缝隙位于所述非封闭管道18的端部，所述轴向区段602的气流包括在到非闭合缝隙达前与其形状相同的气流，该气流从非闭合缝隙吹出。
如图1至15所示，加热单元3设置在轴向区段602中，所述加热单元3包括缺口筒7，所述缺口筒7具有沿其轴线方向延伸的缺口701，所述缺口筒7与外壳1内部的筒状壁8限定所述轴向区段602。通过缺口筒7的设置，是气流能够暂时汇集在外壳1的内部，使气流与加热单元3有足够的时间进行热量传输，然后再其他气流的带动下从出风口5吹出，避免发热丝302发红，使用更加安全。
一种示例，所述缺口701的长度与缺口筒7的长度之比不小于1/2，形成出风区域与加热单元3进行热交换，防止发热丝302发红。进一步的，缺口701的长度不小于缺口筒7长度的2/3。所述加热单元3还包括安装在缺口筒7上的多个云母片301、绕制在多个云母片301上的发热丝302，所述多个云母片301至少设于缺口701的两侧；进一步的，所述多个云母片301沿缺口筒7的轴向均匀间隔设置。所述发热丝302环绕整圈；或者所述发热丝302仅绕制在安装支架的上方，所述缺口701敞开。
另一种示例，所述多个云母片301中的至少一个对应所述缺口701设置，且该云母片301具有朝向缺口701且沿安装支架轴向延伸的悬空端3011。此种情况下，缺口筒7对应缺口701设置处设有固定该云母片301的结构，特别是当缺口701长度较长时，在缺口筒7的两端设有固定云母片301的卡槽；云母片301与缺口701的延伸方向相同，且云母片301设置在缺口701的正上方。
另一种示例，所述缺口筒7为陶瓷加热器件。
本发明还涉及一种电吹风的加热单元3，包括多个云母片301和绕制在云母片301上的发热丝302，其中，所述加热单元3还包括具有中空通道的安装支架，所述多个云母片301安装在所述安装支架上，所述安装支架具有沿其轴向延伸的缺口701，所述多个云母片301至少设于缺口701的两侧。其中一种示例，中空安装支架为上述缺口筒7。
所述安装支架还包括在第一部分19后端沿第一部分19的周向向外延伸的第二部分20，所述云母片301的后端与第二部分20的内侧面相抵靠。好处是提高云母片301的固定可靠性。第一部分19为缺口筒7，第二部分20呈环形或者圆形或者U形或者C形。
所述云母片301的后端具有卡槽，所述卡槽与第二部分20的周缘相抵靠。
所述中空通道内设有阻隔片21，所述阻隔片21靠近中空通道的前端设置，好处是当缺口701长度较长时，通过阻隔片21提高中空安装支架的强度，防止安装支架变形，导致对轴向区段602的气流产生较大的风阻，造成风量损失。
如图1至17所示，当风扇单元22设置在手柄组件2内时，进风口4设置在手柄组件2上，且进风口4位于风扇单元22的下方，所述主风道6包括由手柄组件2限定的竖直区段601，所述手柄组件2与外壳1连接处限定气流从竖直区段601进入轴向区段602的气流入口10，所述缺口701与气流入口10错开设置。气流入口10设置在筒状壁8上、且气流入口10和连通口9对应设置，且气流入口10的中心线与手柄组件2的中心线相同。所述缺口701位于筒状壁8轴线(a-a’)的上方，使竖直区段601的气流进入轴向区段602后大部分气流直接从出风口吹出，减小风量和风压的损失；同时又利于快速烘干头发；且进一步地，所述缺口701与气流入口10相对设置。进一步的，所述缺口筒7上设有使主风道6的气流进入缺口筒7内的穿孔702，所述穿孔702位于筒状壁8轴线的下方且与气流入口10相对设置，好处是，使竖直区段601的气流经过最短的距离进入缺口筒7内部，减小风量的损失。
进一步的，所述风扇单元22设于手柄组件2内，所述筒状壁8上设有气流入口10，所述手柄组件2内的气流从气流入口10进入外壳1内，所述缺口701与气流入口10错开设置。
进一步的，所述缺口筒7上设有与气流入口10相对设置的穿孔702，所述气流通过所述穿孔702进入缺口筒7的内部，该气流可以促进缺口701处的气流流动，缺口701处汇集的气流从出风口5吹出，带走热量。
进一步的，如图16至24所示，所述风扇单元22设置在手柄组件2内，所述进风口4设置在手柄组件2上，所述手柄组件2内还设有用于输送主风道6气流的导风管23。导风管23可以限定主风道6的部分，也可以限定主风道6的全部。导风管23优选软胶材质，例如硅胶。好处是通过风扇单22元抽吸进入主风道6的气流直接通过导风管23进行输送，一方面导风管23形成密封，主风道6的气流从装配缝隙中被泄露的概率降低，从而减小风量和风压损失；当手柄组件2上设有电子器件时，主风道6和电子器件不用再单独做密封结构，简化结构；导风管23还可以对主风道6气流的声音起到缓冲作用，降噪、减震。
进一步的，如图17所示，所述主风道6包括位于手柄组件2内的竖直区段601和位于外壳1内且与竖直区段601呈角度的轴向区段602，所述竖直区段601与轴向区段602通过气流入口10连通，所述导风管23限定该竖直区段601。风扇单元22从进风口4抽吸进入手柄组件2的气流由导风管23限定，从而进入轴向区段602，导风管23形成密封，防止气流从手柄组件2的装配缝隙漏风，减小气流输送过程中产生的风量、风压损失。
所述导风管23自下而上延伸至气流入口10处，好处是，主风道6为非线性风道，气流从竖直区段601进入轴向区段602时气流改变方向会造成风量、风压损失，导风管23延伸至气流入口处使竖直区段601的气流被导风管23送至轴向区段602，减小气流换向带来的风量、风压损失。当进风口4设于手柄组件2的侧壁时，优选导风管23自进风口4的上方向上延伸，导风管23也可以自进风口4的下方向上延伸，此时，导风管23上对应进风口4设置位置处设有穿孔以使气流进入导风管23内；当进风口4即设于手柄组件2的侧壁、又设于手柄组件2的底部时，优选导风管23自侧壁进风口4的上方向上延伸，可以获得较大的进风量，导风管23也可以自侧壁进风口4的下方向上延伸，导风管23上对应侧壁进风口4设置位置处设有穿孔以使气流从侧壁的进风口4进入导风管23内；当进风口4设于手柄组件2的底部时，导风管23的下 端位于进风口4的上方。对于上述进风口4设于手柄组件2的底部时，导风管23的下端可以是开放的，这样可以使尽可能多的气流进入导风管23内部；导风管23的下端也可以是覆盖手柄组件2的底部且对应进风口4处下端设有穿孔使得气流进入导风管23内部。此例中，导风管23延伸至气流入口10处，可以是导风管23恰好延伸至气流入口10的位置，即可以理解为导风管23的侧壁上端围成了该气流入口10；也可以是导风管23的上端延伸至气流入口10附近，与气流入口10之间存在高度差(导风管23的上端略低或略高于气流入口10)。
所述导风管23的上端与气流入口10的距离为L，0mm≤L≤20mm，好处是，防止气流从手柄组件2的缝隙泄露造成风压、风量减小；当L＞20mm时，手柄组件2的装配间隙可能会造成气流外泄导致风压、风量减小。导风管23的上端与气流入口10齐平或者略低。优选L＝0mm。L还可以是5mm、8mm、10mm、15mm。
如图17、图18所示，所述外壳1内设有限定轴向区段602的筒状壁8，所述导风管23靠近筒状壁8的一端具有翻边2301，所述翻边2301位于筒状壁8和外壳1之间。翻边2301为导风管23顶部沿其轴线向外延伸的部分，通过筒状壁8的外壁和外壳1的内壁压住，对导风管23起到固定作用，使在电吹风在工作时，防止导风管23在气流的作用下移位或者电吹风受外力时导风管23产生移位，保证将气流输送至轴向区段602，并减小风量和风压损失。
所述导风管23套在风扇单元22上。风扇单元22可以完全位于导风管23内，也可以部分位于导风管23内。好处是，风扇单元22抽吸的气流直接进入导风管23，减小在风阻，进而减小风量和风压损失。
如图16、17、18所示，所述手柄组件2包括用于固定风扇单元22的固定支架201和套在其外部的外手柄202，所述固定支架201与外壳1连接，且手柄组件2与外壳1分体设置。所述固定支架201的侧壁上设有用于固定风扇单元22的卡槽24，所述导风管23卡入所述卡槽24。风扇单元22和卡槽24之间有导风管23，一方面通过导风管23降低人手握手柄组件2时感受到的震动、且提高风扇单元22的固定可靠性；另一方面降低噪音。卡槽24可以是固定支架201的内侧壁沿远离其轴线的方向向外凹陷形成；也可以是固定支架201的内侧壁设有向其轴线延伸的凸筋，凸筋和固定支架201的内侧壁形成卡槽24。
所述进风口4设置在外手柄202上且位于风扇单元22的下方，所述进风口4呈长条状且具有多个、绕手柄组件2的轴线分布。
如图19所示，所述外手柄202包括上下可拆卸设置的第一外手柄2021和第二外手柄2022，第一外手柄2021位于第二外手柄2022的上方，进风口4设置在第二外手柄2022上。第一外手柄2021和第二外手柄2022均为柱状，长条状的进风口4均匀分布在第二外手柄2022的侧壁，第一外手柄2021的长度大于第二外手柄2022的长度，且第一外手柄2021和第二外手柄2022通过旋扣配合。此种结构，当外手柄202为了美观在手柄底部倒圆角时，便于加工实现，而且第一外手柄2021和第二外手柄2022的连接线可以做的靠近下方，在视觉上不容易被观察到。
进一步的，如图20、21、22、23所示，所述固定支架201具包括沿其轴线方向延伸、且具有垂直于固定支架201轴线方向的敞口2014的第一部分2011，第一部分2011的上端设有用于与外壳1连接的环状连接部2013。环状连接部2013与外壳1通过螺丝32连接。所述风扇单元22设于敞口2014内，所述风扇单元22通过外手柄202和固定支架201固定；外手柄202的内侧壁设有多个筋条2023，多个筋条2023和风扇单元22过盈配合，更进一步的，多个筋条2023通过压紧导风管23、与固定支架201配合实现风扇单元22的固定。
所述外手柄202呈筒状，所述外手柄202的上端绕环状连接部2013设置，且覆盖环状连接部2013与外壳1的连接处。
所述外手柄202的上端设有卡扣26，所述外壳1上设有与所述卡扣26配合的卡孔27；卡扣26和卡孔27均具有多个且均匀间隔设置，卡扣26伸入卡孔27内，缩小外手柄202上端和外壳1之间的间隙。可以理解的，所述外手柄202上端与外壳1相抵靠，外手柄202的下方与固定支架201连接。外壳1与外手柄202相抵靠的位置设有凹槽25，凹槽25呈环形，外壳1上端伸入所述凹槽25，使外壳1表面没有台阶，表面光滑，更加美观。
所述电机2201还包括框架2202，所述扇叶2203设于框架2202内，所述导风管23套在框架上。在该种情况下，电机2201带动扇叶2203旋转从进风口4吸入气流，气流经过框架内部进入导风管23，即框架自带风道。框架可以完全位于导风管23内，也可以部分位于导风管23内，框架的长度为La，框架位于导风管23内的长度为Lb，1/2≤Lb/La≤1，好处是提高导风管23套在框架上的可靠性；当Lb/La＜1/2时，导风管23容易从框架上脱落，增加装配难度，导风管23和框架的配合不可靠性可能会导致气流泄露，造成风量和风压的损失。
所述电吹风还包括过滤网28，所述过滤网28呈片状且位于进风口4上方，所述 过滤网28垂直于手柄组件2的轴线设置，此例中，过滤网28优选塑料网、或者金属网。
所述电吹风还包括保护电线的护线套30，所述固定支架201下方设有中空柱状部29，护线套30穿过所述中空柱状部29。护线套30优选为软胶材质，本例中为硅胶材质，电缆31穿过护线套30，防止电缆31与较硬的手柄组件2摩擦导致电缆31损坏，产生漏电等安全问题，延长使用寿命。在此例中，中空柱状部29包括第一C型柱2901和第二C型柱2902，第一C型柱2901和固定支架201的第一部分2011连接，第二C型柱2902和第一外手柄2021连接，当第一外手柄2021套在本例中的固定支架201上后第一C型柱2901和第二C型柱2902扣合形成中空柱装部。第一C型柱2901可以与固定支架201一体设置，也可以分体设置。第二C型柱2902和第一外手柄2021可以一体设置，也可以分体设置。
实施例二：
实施例二与实施例一的区别在于，如图24至26所示，所述固定支架201还包括沿其轴线方向延伸的第二部分2012，所述风扇单元22设于敞口2014内，所述第二部分2012与第一部分2011连接以覆盖所述敞口2014以固定所述风扇单元22；在此示例中，将导风管23套在风扇单元22上，然后放入第一部分2011内，将第二部分2012与第一部分2011扣合，然后套上外手柄202即可；更进一步的，两半式的固定支架201可以通过螺丝32实现连接，即第一部分2011和第二部分2012通过螺丝32连接在一起，从而实现固定可靠性。卡槽24可以仅设于第一部分2011上，也可同时设于第二部分2012上，使固定更加可靠，减小震动及噪音。
另外为了进一步保证第一外手柄2021和固定支架201的连接可靠性、外手柄202和外壳1的连接可靠性，第一外手柄2021和第二部分2012在下端通过螺丝32连接。
实施例三：
实施例三与实施例一的区别在于，第一外手柄2021和固定支架201在下端通过螺丝32连接，更进一步地，第一外手柄2021和固定支架201的第一部分2011在下端通过螺丝32连接。
实施例四：
实施例四与实施例一的区别在于，所述手柄组件2包括用于固定风扇单元22的固定支架201和套在其外部的外手柄202，所述导风管23位于固定支架201和外手柄202之间且套在固定支架201上，所述风扇单元22设于固定支架201内。
实施例五：
实施例五与实施例一的区别在于，所述过滤网28呈柱状且与通过注塑与外手柄202一体成型，过滤网28设设置在进风口4处，此例中，过滤网28优选为尼龙网。
在本发明中，外壳的中心线、外壳的轴线、内筒的中心线、内筒的轴线、缺口筒的中心线、缺口筒的轴线相同。
上述实施方式仅是本发明的优化实施方式，不是本发明的全部实施例，根据本发明的原理，本领域技术人员可以作出各种变形，只要不脱离本发明的精神，均应属于本发明所述权利要求所定义的范围。

Claims (20)

  1. 一种电吹风，包括外壳，与外壳连接的手柄组件、风扇单元、加热单元、进风口和出风口；
    所述风扇单元用于抽吸气流从进风口进入电吹风并从出风口吹出形成主风道，所述加热单元用于加热该气流；
    所述风扇单元包括扇叶和用于驱动该扇叶旋转的电机；
    其特征在于，所述主风道包括沿外壳的轴线方向延伸的轴向区段，所述外壳内设有具有缺口的缺口筒，所述缺口筒与外壳内部的筒状壁限定所述轴向区段。
  2. 根据权利要求1所述的电吹风，其特征在于，所述缺口沿缺口筒的轴线方向延伸，所述缺口的长度与缺口筒的长度之比不小于1/2。
  3. 根据权利要求2所述的电吹风，其特征在于，所述手柄组件与外壳连接处形成使两者连通的连通口，所述缺口延伸至连通口的上游侧。
  4. 根据权利要求2所述的电吹风，其特征在于，所述手柄组件与外壳连接处形成使两者连通的连通口，所述缺口延伸至/越过连通口的下游侧；或者所述缺口延伸至连通口的上游侧和下游侧之间。
  5. 根据权利要求4所述的电吹风，其特征在于，所述连通口与缺口错开设置。
  6. 根据权利要求2所述的电吹风，其特征在于，所述缺口位于外壳轴线的上方。
  7. 根据权利要求1所述的电吹风，其特征在于，所述缺口筒上设有使主风道的气流进入缺口筒的穿孔，所述穿孔和缺口的投影至少部分重合；
    或者，所述缺口筒上设有使主风道的气流进入缺口筒的穿孔，所述穿孔位于缺口起始端的上游侧，且两者相对设置。
  8. 一种电吹风，包括外壳、与外壳连接的手柄组件、风扇单元、加热单元、进风口和出风口；
    所述风扇单元用于抽吸气流从进风口进入电吹风并从出风口吹出形成主风道，所述加热单元用于加热该气流；
    所述风扇单元包括扇叶和用于驱动该扇叶旋转的电机；
    其特征在于，所述主风道包括沿外壳的轴线方向延伸的轴向区段，所述加热单元设置在所述轴向区段中，所述加热单元包括缺口筒，所述缺口筒具有沿其轴线方向延伸的缺口，所述缺口筒与外壳内部的筒状壁限定所述轴向区段。
  9. 根据权利要求8所述的电吹风，其特征在于，所述加热单元还包括安装在缺口筒上的多个云母片、绕制在多个云母片上的发热丝，所述多个云母片至少设于缺口的两侧，所述发热丝至少绕制在所述缺口筒的外侧壁的上方。
  10. 根据权利要求9所述的电吹风，其特征在于，所述多个云母片中的至少一个对应所述缺口设置，且该云母片具有朝向缺口且沿缺口筒轴向延伸的悬空端。
  11. 根据权利要求9所述的电吹风，其特征在于，所述缺口筒包括轴向延伸的第一部分，所述缺口设于第一部分，所述云母片与第一部分卡接，且所述多个云母片均匀间隔设置。
  12. 根据权利要求11所述的电吹风，其特征在于，所述缺口筒还包括在第一部分后端沿第一部分的周向向外延伸的第二部分，所述云母片的后端与第二部分的内侧面相抵靠。
  13. 根据权利要求12所述的电吹风，其特征在于，所述云母片的后端具有卡槽，所述卡槽与第二部分的周缘相抵靠。
  14. 一种电吹风，包括外壳，与外壳连接的手柄组件、风扇单元、加热单元、进风口和出风口；
    所述风扇单元用于抽吸气流从进风口进入电吹风并从出风口吹出形成主风道，所述加热单元用于加热该气流；
    所述风扇单元包括扇叶和用于驱动该扇叶旋转的电机；
    其特征在于，所述主风道包括沿外壳的轴线方向延伸的轴向区段，所述外壳内设有具有缺口的缺口筒，所述缺口沿外壳的轴线方向延伸，所述出风口为位于轴向区段端部的非闭合缝隙。
  15. 根据权利要求14所述的电吹风，其特征在于，所述非闭合缝隙具有开放部，所述开放部位于非闭合缝隙中心线的一侧。
  16. 根据权利要求15所述的电吹风，其特征在于，所述开放部位于外壳中心线的上方。
  17. 根据权利要求16所述的电吹风，其特征在于，所述开放部的两端位于手柄组件中心线的两侧。
  18. 根据权利要求15所述的电吹风，其特征在于，所述开放部与缺口朝向同一方向。
  19. 根据权利要求14所述的电吹风，其特征在于，所述轴向区段由缺口筒和外壳内部的筒状壁限定，所述非闭合缝隙由缺口筒和筒状壁限定。
  20. 根据权利要求19所述的电吹风，其特征在于，所述电吹风还包括封闭部，所述封闭部封闭缺口筒和筒状壁之间的部分缝隙以形成所述非闭合缝隙。
PCT/CN2019/115432 2018-11-08 2019-11-04 电吹风 WO2020093981A1 (zh)

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