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CN-114319209-B - Hair drier

CN114319209BCN 114319209 BCN114319209 BCN 114319209BCN-114319209-B

Abstract

The application provides a blower, which comprises an operating handle, an air inlet cover provided with a plurality of shield holes, an air channel part, an axial flow fan and a motor, wherein the axial flow fan is arranged in the air channel part, the blower further comprises a support piece which extends longitudinally, the support piece is connected with the air inlet cover through a first end, the support piece is connected with the operating handle through a second end, the projection of the first end falling on a rotating surface formed by rotation of the axial flow fan along the longitudinal extension direction of the support piece is always positioned in the outer contour range of the rotating surface of the axial flow fan, the cross section area of the air inlet cover is smaller than 13300mm 2 , the air inlet cover is provided with an inserting part, the blower further comprises a first connecting structure, the first end of the support piece is connected with the air inlet cover through the first connecting structure, and the orthographic projection of the first connecting structure falling on the rotating surface is basically not overlapped with the orthographic projection of the shield holes falling on the rotating surface. The blower provided by the application has a compact structure, and improves the use feeling of a user.

Inventors

  • YU XUEFENG
  • DUAN FENGWEI

Assignees

  • 苏州宝时得电动工具有限公司

Dates

Publication Date
20260508
Application Date
20201208
Priority Date
20200929

Claims (14)

  1. 1. A hair dryer, comprising: an operation handle for being held by a user; The air inlet cover is provided with a plurality of shield holes for air flow to pass through; The air duct part is provided with an axial air inlet communicated with the outside, the air inlet cover is connected to the axial air inlet, and the axial air inlet is communicated with the shield hole; an axial flow fan disposed in the air channel portion; a motor for driving the axial flow fan to rotate to form an air flow; the blower is characterized by further comprising a supporting piece extending along the longitudinal direction, wherein the supporting piece is provided with a first end and a second end which are opposite to each other in the longitudinal direction, the supporting piece is connected with the air inlet cover through the first end, the supporting piece is connected with the operating handle through the second end, and the orthographic projection of the first end falling on a rotating surface formed by the rotation of the axial flow fan along the longitudinal extending direction of the supporting piece is always positioned within the outer contour range of the rotating surface of the axial flow fan; The blower further includes a battery pack mounting portion for removable engagement with a battery pack for powering the motor, the battery pack mounting portion being disposed proximate the second end of the support member; In the direction perpendicular to the longitudinal direction, the cross section area of the air inlet cover is smaller than 13300mm 2 , the air inlet cover is provided with a plug-in part extending for a preset distance in the extending direction of the supporting piece, and the shield holes are circumferentially distributed on the periphery of the plug-in part; The blower further comprises a first connecting structure, the first end of the supporting piece is in locking connection with the plug-in part of the air inlet cover through the first connecting structure, and in the longitudinal extending direction of the supporting piece, the orthographic projection of the first connecting structure falling on the plane of the rotating surface is basically not overlapped with the orthographic projection of the shield hole falling on the plane of the rotating surface.
  2. 2. The hair dryer of claim 1, wherein the socket is configured as a socket, and the first connection structure includes a positioning hole provided on an inner wall of the socket and a positioning piece provided on the support member, wherein the positioning piece has a locking state of forming a snap-fit with an inner wall of the positioning hole to restrict the support member from being pulled out rearward from the socket.
  3. 3. A hair dryer as in claim 2, wherein in said locked condition, the outer contour of said positioning member extends radially outwardly beyond the contour of the inner wall surface of said positioning aperture.
  4. 4. The blower of claim 2, wherein said positioning member further has a natural state in which its shape is inserted into said insertion portion, and in said natural state, said positioning member is in a preset position corresponding to said positioning hole; and the positioning member is configured to be able to change its shape in the locked state when subjected to an external force.
  5. 5. The hair dryer of claim 2 wherein said first connection structure further comprises a stop disposed at an end of said mating portion, said stop being capable of abutting said first end of said support member to prevent forward movement of said support member from said mating duct.
  6. 6. The blower of claim 1, wherein the air intake shroud is configured to extend over a fan axis of the axial flow fan; The projected area of orthographic projection of the air inlet cover on the plane of the rotating surface along the longitudinal direction is S1; the first end of the supporting piece longitudinally falls on a projection area S2 of orthographic projection on a plane of the rotating surface; wherein S1/S2 is more than or equal to 6 and less than or equal to 16.
  7. 7. The blower of claim 1, wherein the air passage portion includes a main blower pipe and an auxiliary blower pipe provided in communication with the main blower pipe, a gap being formed between the main blower pipe and the auxiliary blower pipe for external air flow into the auxiliary blower pipe, the blower being switchable between a first mode of operation in which air is discharged at a relatively high air speed and a relatively low air volume and a second mode of operation in which air is discharged at a relatively low air speed and a relatively high air volume by the auxiliary blower pipe, The maximum rotating speed of the motor is 18000 rpm-35000 rpm, the weight of the blower is not more than 1.5kg when the blower is not connected with the battery pack, the maximum wind speed of the blower in a first working mode is 90 mph-110 mph, the maximum wind quantity of the blower in a second working mode is 350 cfm-500 cfm, and the working time of the battery pack is not less than 6min.
  8. 8. The hair dryer of claim 7, wherein said operating handle includes a switching element at least partially exposed for a user to turn on and off said hair dryer, an orthographic projection of a center of gravity of the hair dryer incorporating said battery pack on a plane perpendicular to said rotation plane being G 'in a longitudinal direction, an orthographic projection of a foremost end of said switching element on a plane perpendicular to said rotation plane being K', said orthographic projection G 'being configured to be within a range of 100mm forward and backward from said orthographic projection K'.
  9. 9. The blower of claim 8, wherein the element connected to the first end of the support defines a first weight mechanism, the element connected to the second end of the support is positioned as a second weight mechanism, a distance L1 between an orthographic projection of a center of gravity of the first weight mechanism on a plane perpendicular to the rotation plane and the orthographic projection G ', a distance L2 between an orthographic projection of a center of gravity of the second weight mechanism on a plane perpendicular to the rotation plane and the orthographic projection G', and a longitudinal length of the first weight mechanism in the longitudinal direction is 420mm to 560mm, and a length of the support exposed to the outside is configured to be 100 to 140mm within a range of 60% -80% of the distance L1.
  10. 10. The hair dryer of claim 9 wherein said battery pack is adapted to be attached to at least two different types of hand tools, said battery pack being one in number, and wherein said second weight means weighs no more than 140% of said first weight means and no less than 105% of said first weight means.
  11. 11. The blower of claim 1, wherein the air passage portion includes a main blower pipe and an auxiliary blower pipe provided in communication with the main blower pipe, a gap being formed between the main blower pipe and the auxiliary blower pipe for external air flow into the auxiliary blower pipe, the blower being switchable between a first mode of operation in which air is discharged at a relatively high air speed and a relatively low air volume and a second mode of operation in which air is discharged at a relatively low air speed and a relatively high air volume by the auxiliary blower pipe, The maximum rotating speed of the motor is 20000-3800 rpm, the weight of the blower when the blower is not connected with the battery pack is not more than 2kg, the maximum wind speed of the blower in a first working mode is 110-180 mph, the maximum wind quantity of the blower in a second working mode is 420-650 cfm, and the working time of the battery pack is not less than 6min.
  12. 12. The hair dryer of claim 11 wherein said operating handle includes a switch element at least partially exposed for a user to turn said hair dryer on and off, said hair dryer further comprising a first battery pack and a second battery pack for powering said motor, an orthographic projection of a center of gravity of the hair dryer incorporating said battery packs on a plane perpendicular to said rotational plane in said longitudinal direction being G ', an orthographic projection of a forwardmost end of said switch element on a plane perpendicular to said rotational plane being K', said orthographic projection G 'being configured to be within a range of 70mm forward and rearward from said orthographic projection K'.
  13. 13. A hair dryer according to claim 12, wherein the element connected to the first end of the support member is defined as a first weight mechanism, the element connected to the second end of the support member is defined as a second weight mechanism, the distance L1 between the orthographic projection of the center of gravity of the first weight mechanism on the plane perpendicular to the rotation plane and the orthographic projection G ', the distance L2 between the orthographic projection of the center of gravity of the second weight mechanism on the plane perpendicular to the rotation plane and the orthographic projection G', the longitudinal length of the first weight mechanism is between 480mm and 650mm, and the length of the support member exposed to the outside in the longitudinal extension direction of the support member is configured to be between 110 mm and 135mm within the range of 40% -60% of the distance L1.
  14. 14. The hair dryer of claim 13 wherein said battery pack is adapted to be connected to at least two different types of hand tools, said first battery pack and said second battery pack each having a nominal output voltage of greater than or equal to 20V and less than or equal to 40V, said second weight mechanism having a weight of no greater than 250% of said first weight mechanism and no less than 150% of said first weight mechanism.

Description

Hair drier Technical Field The application relates to an electric tool, in particular to a blower. Background The blower is used as a more conventional electric tool and can be used for blowing fallen leaves, pavement dust, accumulated water, snow, forest fire extinguishment and the like. The blower may generally include a housing, an operating handle formed on the housing, a motor housed in the housing, a fan driven by the motor to operate, a duct located at a front end of the housing, a flow guide mechanism provided in the duct, and a blower pipe connected to a front end of the duct. The working principle is that the motor drives the fan to operate to generate air flow, and the air flow is blown out through the front end opening of the blowing pipe after being guided by the guiding mechanism. The user operates the operating handle by hand to direct the front end of the blowpipe toward the target object (e.g., fallen leaves, dust, accumulated water, snow, flame, etc.), and the air stream is blown toward the target object. In conventional blowers on the market, the length of the air channel portion is mainly represented by that the air channel air inlet is arranged in the rearmost area of the blower, and the operating handle and/or the battery pack is close to the air channel air inlet at the rear end, so that the length of the air channel portion is basically equal to the length of the blower in the longitudinal direction. However, the longer length of the air duct portion results in an increased resistance to air flow generated by the fan in the flow of the blower pipe, which in turn results in a loss of air flow speed, and in a greater machine weight. In order to reduce the air flow speed loss as much as possible and to realize the light machine, one solution is to shorten the length of the air channel part, so as to reduce the volume of the air channel, but this brings new challenges to the operation comfort and the performance of the machine. Disclosure of Invention In order to solve the technical problems in the prior art, the application provides the blower, which can reduce the whole volume of the blower and improve the use feeling of a user. In order to achieve the above object, the technical scheme provided by the application is as follows: a hair dryer includes an operating handle for a user to hold; The air inlet cover is provided with a plurality of shield holes for air flow to pass through; The air duct part is provided with an axial air inlet communicated with the outside, the air inlet cover is connected to the axial air inlet, and the axial air inlet is communicated with the shield hole; an axial flow fan disposed in the air channel portion; a motor for driving the axial flow fan to rotate to form an air flow; The blower further comprises a support extending along the longitudinal direction, the support is provided with a first end and a second end which are opposite to each other in the longitudinal direction, the support is connected with the air inlet cover through the first end, the support is connected with the operating handle through the second end, and the orthographic projection of the first end falling on a rotating surface formed by the rotation of the axial flow fan along the longitudinal extending direction of the support is always positioned within the outer contour range of the rotating surface of the axial flow fan; The blower further includes a battery pack mounting portion for removable engagement with a battery pack for powering the motor, the battery pack mounting portion being disposed proximate the second end of the support member; In the direction perpendicular to the longitudinal direction, the cross section area of the air inlet cover is smaller than 13300mm 2, the air inlet cover is provided with a plug-in part extending for a preset distance in the extending direction of the supporting piece, and the shield holes are circumferentially distributed on the periphery of the plug-in part; The blower further comprises a first connecting structure, the first end of the supporting piece is in locking connection with the plug-in part of the air inlet cover through the first connecting structure, and in the longitudinal extending direction of the supporting piece, the orthographic projection of the first connecting structure falling on the plane of the rotating surface is basically not overlapped with the orthographic projection of the shield hole falling on the plane of the rotating surface. In one embodiment, the plugging portion is configured as a plugging duct, and the first connection structure includes a positioning hole provided on an inner wall of the plugging duct and a positioning member provided on the support member, wherein the positioning member has a locking state of forming a snap-fit with the inner wall of the positioning hole so as to limit the support member from being pulled out backward from the plugging portion. In one embodiment, in the locked state,