hair dryer

Abstract

The present invention discloses a hair dryer, comprising a housing, a wind tube, and a fan assembly. The housing is provided with an air outlet at one end and a convex curved surface that rises away from the air outlet at the other end, with a plurality of air inlets arranged on the convex curved surface. The wind tube is mounted within the housing and has a main air duct connecting the air inlet and the air outlet. The fan assembly is mounted within the main air duct and is configured to drive airflow from the air inlet through the main air duct to the air outlet. The heating assembly is disposed within the main air duct and is located between the fan assembly and the air outlet. The technical solution of the present invention can reduce noise during operation of the hair dryer.

Description

Technical Field

[0001] The present invention relates to the technical field of hairdressing products, in particular to a hair dryer. Background Art

[0002] Hair dryers have become a frequently used personal care product in daily life, mainly used for drying and styling hair. However, during daily use, the rotation of the blower generates a lot of noise, which in turn causes noise pollution and affects users' use. Summary of the Invention

[0003] The main purpose of the present invention is to provide a hair dryer, aiming to reduce the noise when the hair dryer is working.

[0004] To achieve the above-mentioned object, the hair dryer proposed by the present invention comprises:

[0005] A housing, wherein one end of the housing is provided with an air outlet, and the other end is provided with a convex arc surface that rises in a direction away from the air outlet, and the convex arc surface is provided with a plurality of air inlets;

[0006] an air duct installed in the housing and having a main air duct communicating with the air inlet and the air outlet;

[0007] a fan assembly installed in the main air duct, the fan assembly being configured to drive airflow from the air inlet through the main air duct to the air outlet; and

[0008] A heating component is arranged in the main air duct and located between the fan component and the air outlet.

[0009] Optionally, the outer shell includes a shell body and a back cover, the air outlet is provided at one end of the shell body, and the mounting port is provided at the other end, the air duct is installed in the shell body, the main air duct connects the air inlet and the mounting port, and the back cover is detachably covered on the mounting port, and forms the convex arc surface and the air inlet.

[0010] Optionally, the hair dryer further includes a first filter, the first filter cover is arranged at the installation port, and the rear cover is arranged outside the first filter to confine the first filter to the shell body.

[0011] Optionally, the hair dryer further includes a second filter, which is installed on the air cylinder and covers the main air duct.

[0012] Optionally, the aperture of the holes on the second filter screen is smaller than the aperture of the holes on the first filter screen.

[0013] Optionally, the second filter includes an annular circumferential wall, a bottom wall covering one end of the annular circumferential wall, and a connecting flange connected to the other end of the annular circumferential wall, the connecting flange is connected to the air duct, the annular circumferential wall is located on the side of the air duct facing the air outlet, and the annular circumferential wall and the bottom wall are both provided with a plurality of through holes; the diameter of the annular circumferential wall is set to decrease in the direction close to the air outlet.

[0014] Optionally, the shell body is provided with a first step portion at the edge of the installation opening, the first step portion surrounds the installation opening, and is recessed relative to the outer surface of the shell body, and the periphery of the back cover is snapped onto the first step portion.

[0015] Optionally, the first step portion includes at least one front convex section and at least one rear convex section, the front convex section is protruded toward the air outlet relative to the rear convex section, and the front convex section and the rear convex section are alternately distributed along the circumference of the installation port.

[0016] Optionally, the air duct includes a first cylinder and a second cylinder connected to each other, the first cylinder and the second cylinder together form the main air duct, the second cylinder is arranged close to the air outlet relative to the first cylinder, the fan assembly is arranged in the first cylinder, and the heating assembly is arranged in the second cylinder.

[0017] Optionally, the first cylinder includes two spliced ​​shell parts, which are spliced ​​together to form an inner cavity of the first cylinder. The inner cavity wall of the first cylinder is provided with a mounting groove, and the fan assembly is installed in the mounting groove.

[0018] Optionally, the hair dryer also includes a second filter, the second filter including an annular circumferential wall, a bottom wall covering one end of the annular circumferential wall, and a connecting flange connected to the other end of the annular circumferential wall, the connecting flange being stuck in the mounting groove, the annular circumferential wall being located on the side of the first cylinder facing the air inlet, and the fan assembly abutting against the side of the connecting flange facing away from the air inlet.

[0019] Optionally, at least the air duct portion close to the air outlet in the main air duct is configured to be contracted.

[0020] Optionally, the hair dryer is provided with a mounting opening, the outer shell is provided with a handle extending laterally, the hair dryer includes a circuit board, the circuit board is provided in the handle, and extends from the mounting opening into the main air duct for electrical connection of the blower assembly, and the circuit board and the mounting opening are sealed.

[0021] The technical solution of the present invention is to provide a convex curved surface that is raised in a direction away from the air outlet at one end of the housing away from the air outlet, and to arrange a number of air inlets on the convex curved surface. In this way, more air inlets can be arranged on the convex curved surface, which can increase the air inlet area of ​​the air inlet, thereby reducing the air flow velocity at the air inlet, which is beneficial to reducing the possibility of noise generated by excessive air flow velocity at the air inlet. At the same time, all air inlets are arranged on the convex curved surface, and the air flow flowing to the air inlet can slide along the convex curved surface to each air inlet, which can reduce the noise generated by the collision of the air inlet air flow with the convex curved surface and the turbulence of the air flow. That is, the present invention can effectively reduce the noise of the hair dryer during operation by arranging the air inlet on the convex curved surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a structural schematic diagram of an embodiment of a hair dryer of the present invention;

[0024] Figure 2 for Figure 1 Exploded view of the middle rear cover, first filter, and housing body;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 for Figure 2 Schematic diagram of the structure of the middle and rear cover;

[0027] Figure 5 for Figure 1 A schematic diagram of the structure of the hair dryer from another angle;

[0028] Figure 6 for Figure 5 Schematic diagram of the structure of the medium hair dryer after installing the nozzle;

[0029] Figure 7 for Figure 6 a cross-sectional view of the hair dryer;

[0030] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0031] Figure 9 for Figure 7 Enlarged view of point C in the middle;

[0032] Figure 10 for Figure 7 Exploded view of the stroke tube.

[0033] Description of Figure Numbers:

[0034] 10. Shell; 11. Shell body; 101. Mounting port; 102. Air outlet; 103. Support grille; 104. Ventilation port; 111. Air cylinder; 112. Handle; 113. Retaining ring; 115. First step; 1151. Front convex section; 1152. Rear convex section; 1153. Snap-fit ​​hole; 1154. Snap-fit ​​convex section; 1155. Positioning hole; 116. Second step; 117. First shell; 118. Second shell; 12. Back cover; 121. Air inlet; 122. Convex arc surface; 12 3. Buckle; 124. Clamping hole; 125. Positioning protrusion; 20. Air cylinder; 21. Main air duct; 22. Air guide duct; 23. First cylinder; 231. Joint shell; 232. Mounting groove; 24. Second cylinder; 30. Nozzle; 31. Socket section; 32. Air guide section; 40. Fan assembly; 41. Mounting cylinder; 42. Motor; 43. Fan blade; 50. Circuit board; 60. Heating assembly; 70. First filter; 80. Second filter; 81. Annular wall; 82. Bottom wall; 83. Connecting flange.

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The invention provides a hair dryer.

[0040] In the embodiment of the present invention, please refer to Figures 1 to 10 The hair dryer includes a shell 10, a wind tube 20 and a fan assembly 40. One end of the shell 10 is provided with an air outlet 102, and the other end is provided with a convex arc surface 122 that rises in a direction away from the air outlet 102, and the convex arc surface 122 is provided with a plurality of air inlets 121; the wind tube 20 is installed in the shell 10 and has a main air duct 21 connecting the air inlet 121 and the air outlet 102; the fan assembly 40 is installed in the main air duct 21, and the fan assembly 40 is configured to drive the airflow from the air inlet 121 through the main air duct 21 to the air outlet 102.

[0041] In this embodiment, the hair dryer further includes an electronic control device and a heating assembly 60. Both the fan assembly 40 and the heating assembly 60 are electrically connected to the electronic control device. The heating assembly 60 is disposed within the main air duct 21 and is located between the fan assembly 40 and the air outlet 102. When the fan assembly 40 is activated, it drives external airflow into the air inlet 121 and drives the airflow through the heating assembly 60 and out of the air outlet 102. The specific structures of the fan assembly 40, the electronic control device, and the heating assembly 60 can be referred to in the prior art and will not be described in detail here. The convex curved surface 122 can be an ellipsoidal surface, a spherical surface, or other curved surface.

[0042] The housing 10 includes a wind tube 20 portion 111 and a handle portion 112. The handle portion 112 is connected to the side of the wind tube 20 portion 111. An air inlet 121 is provided at one end of the wind tube 20 portion 111, and an air outlet 102 is provided at the other end. The fan assembly 40 is provided in the wind tube 20 portion 111, and the electronic control device is at least partially provided in the handle portion 112.

[0043] The technical solution of the present invention is to provide a convex curved surface 122 that rises away from the air outlet 102 at one end of the housing 10 away from the air outlet 102, and to arrange a plurality of air inlets 121 on the convex curved surface 122. This allows for more air inlets 121 to be arranged on the convex curved surface 122, thereby increasing the air intake area of ​​the air inlets 121, thereby reducing the air flow velocity at the air inlets 121, and helping to reduce the possibility of noise generated by excessive air flow velocity at the air inlets 121. At the same time, all air inlets 121 are arranged on the convex curved surface 122, and the air flow flowing to the air inlets 121 can slide along the convex curved surface 122 to each air inlet 121, thereby reducing the noise generated by the collision of the incoming air flow with the convex curved surface 122 and the turbulence of the air flow. In other words, the present invention can effectively reduce the noise generated during the operation of the hair dryer by arranging the air inlets 121 on the convex curved surface 122.

[0044] In some embodiments, the housing 10 includes a housing body 11 and a back cover 12. The housing body 11 has an air outlet 102 at one end and a mounting opening 101 at the other end. The air duct 20 is mounted within the housing body 11. The main air duct 21 connects the air inlet 121 and the mounting opening 101. The back cover 12 is detachably mounted over the mounting opening 101 and has a convex curved surface 122 and an air inlet 121. This facilitates the separate molding of the back cover 12, and after prolonged use, the back cover 12 can be removed to clean dust from the housing body 11 and on the back cover 12.

[0045] In some embodiments, the hair dryer further includes a first filter 70, the first filter 70 being covered by the mounting opening 101, and the rear cover 12 being covered outside the first filter 70 to confine the first filter 70 to the housing body 11. By covering the first filter 70 at the mounting opening 101 of the housing body 11, and then covering the rear cover 12 outside the first filter 70, and the rear cover 12 being detachably connected to the housing body 11, the first filter 70 is confined to the housing body 11. This is equivalent to having the back cover 12 and the housing body 11 jointly clamp the first filter 70, eliminating the need for a filter mounting structure between the first filter 70 and the housing body 11 or between the first filter 70 and the back cover 12. This simplifies the structure of the first filter 70, the back cover 12, and the housing body 11, and reduces the number of steps required to assemble and disassemble the first filter 70. The first filter 70 can be removed by simply removing the back cover 12 from the housing body 11. This also makes the first filter 70 independent of the back cover 12 and the housing body 11, reducing the difficulty of cleaning the first filter 70 and greatly facilitating its cleaning. Furthermore, even if the first filter 70 becomes damaged and cannot be used normally, it can be easily replaced independently.

[0046] In some embodiments, the first filter 70 is arranged to be raised in a direction away from the air outlet 102 and is in contact with the inner side of the rear cover 12. This allows the first filter 70 to be supported by the rear cover 12, thereby reducing the risk of deformation of the first filter 70 under high wind pressure. Of course, in other embodiments, the first filter 70 can also be in the form of a sheet and spaced apart from the inner side of the rear cover 12.

[0047] In some embodiments, the housing body 11 is provided with a support grille 103 at the mounting opening 101. The support grille 103 and the rear cover 12 jointly hold the first filter screen 70. Specifically, the support grille 103 is primarily composed of crisscrossing support bars. This allows the support grille 103 and the rear cover 12 to jointly hold the first filter screen 70. The support grille 103 effectively supports the inner side of the first filter screen 70, ensuring stable installation of the first filter screen 70 and preventing the risk of deformation of the first filter screen 70 toward the mounting opening 101. Of course, in other embodiments, the first filter screen 70 may be composed solely of a plurality of parallel, spaced support bars.

[0048] In some embodiments, the support grille 103 is configured to be raised in a direction away from the mounting opening 101 to press the first filter 70 against the inner side of the rear cover 12. Specifically, the first filter 70 and the rear cover 12 are both configured to be raised in a direction away from the mounting opening 101, and the shapes of the raised support grille 103, the first filter 70, and the rear cover 12 are substantially the same, so that the support grille 103, the first filter 70, and the rear cover 12 can cooperate well. This configuration can increase the surface area of ​​the first filter 70, thereby increasing the air intake area of ​​the first filter 70 and increasing the air intake volume. The shapes of the raised support grille 103, the first filter 70, and the rear cover 12 can be hemispherical, ellipsoidal, or other shapes.

[0049] In some embodiments, the hair dryer further includes a second filter 80, which is mounted on the air cylinder 20 and covers the main air duct 21. That is, the second filter 80 covers the main air duct 21, and the first filter 70 covers the second filter 80. In this way, after the air flows into the air inlet 121, it needs to be filtered by the first filter 70 and the second filter 80 in sequence before entering the main air duct 21. In this way, the filtration of the first filter 70 and the second filter 80 can improve the cleanliness of the air entering the main air duct 21 and reduce dust in the fan assembly 40 and the heating assembly 60.

[0050] In some embodiments, the apertures of the second filter 80 are smaller than the apertures of the first filter 70. This allows the first filter 70 to filter larger dust particles, such as hair, while the second filter 80 can filter finer dust. This hierarchical filtration design can further enhance the filtration effect and prevent large particles from clogging the apertures of the second filter 80.

[0051] In some embodiments, the second filter 80 is arranged to be tapered in the direction away from the air outlet 102. Such an arrangement can also make the shape of the second filter 80 similar to the shape of the first filter 70. The airflow passing through the first filter 70 to the second filter 80 may be better able to pass directly through the second filter 80, which is beneficial to reducing airflow loss.

[0052] In some embodiments, the second filter 80 includes an annular circumferential wall 81, a bottom wall 82 covering one end of the annular circumferential wall 81, and a connecting flange 83 connected to the other end of the annular circumferential wall 81. The connecting flange 83 is connected to the air duct 20. The annular circumferential wall 81 is located on the side of the air duct 20 facing the air outlet 102. Both the annular circumferential wall 81 and the bottom wall 82 are provided with a plurality of through holes. This simplifies the structure of the second filter 80 and increases the surface area of ​​the second filter 80, thereby increasing the air intake area of ​​the second filter 80 and the air intake volume. Of course, in other embodiments, the second filter 80 may also have an ellipsoidal, hemispherical, or conical shape, etc.

[0053] In some embodiments, the diameter of the annular circumferential wall 81 decreases as it approaches the air outlet 102. This allows the shape of the second filter 80 to be similar to that of the first filter 70. Airflow from the first filter 70 to the second filter 80 can flow directly through the second filter 80, thus minimizing airflow losses. Of course, in other embodiments, the annular circumferential wall 81 may also be straight.

[0054] In some embodiments, the housing body 11 is provided with a first step 115 at the edge of the mounting opening 101. The first step 115 surrounds the mounting opening 101 and is recessed relative to the outer surface of the housing body 11. The periphery of the rear cover 12 is snap-fitted to the first step 115. Specifically, the depth of the first step 115's recess relative to the outer surface of the housing body 11 is roughly equivalent to the thickness of the periphery of the rear cover 12, effectively overlapping the periphery of the rear cover 12 with the first step 115. Thus, when the periphery of the rear cover 12 is snap-fitted to the first step 115, the outer surface of the rear cover 12 is substantially flush with the outer surface of the housing body 11. In other words, the provision of the first step 115 can reduce the protrusion of the rear cover 12 relative to the outer surface of the housing body 11 or prevent the rear cover 12 from protruding beyond the outer surface of the housing body 11.

[0055] In some embodiments, the first step 115 is a continuous annular structure, which can provide the first step 115 with high structural strength and a large contact area with the rear cover 12, thereby improving the installation stability of the rear cover 12. Of course, in other embodiments, the first step 115 includes multiple connecting portions, which are spaced apart along the circumference of the installation opening 101, and the rear cover 12 is engaged with the connecting portions.

[0056] In some embodiments, one of the case body 11 and the back cover 12 is provided with a snap-fitting hole 1153, and the other is provided with a snap-fitting hole 1153. Specifically, one of the first step 115 and the back cover 12 is provided with a snap-fitting hole 1153, and the other is provided with a snap-fitting hole 1153. This simplifies the snap-fitting structure between the case body 11 and the back cover 12, which helps simplify the structure of the case body 11 and the back cover 12. Moreover, when the snap-fitting hole 1153 is inserted into the snap-fitting hole 1153, the contact area between the snap-fitting hole 1153 is larger. While achieving a snap-fitting fixation, it also improves the retaining effect of the back cover 12, effectively preventing the back cover 12 from loosening relative to the case body 11 and improving the installation stability of the back cover 12.

[0057] In this embodiment, a buckle 123 is provided on the inner portion of the periphery of the rear cover 12, and a buckle hole 1153 is provided on the first step 115. Specifically, compared to the structure of the buckle hole 1153, the size of the buckle 123 is smaller. By providing the buckle hole 1153 on the shell body 11, the space on the shell body 11 can be fully utilized to provide the buckle hole 1153, so that the structural strength at the buckle hole 1153 is higher. When the buckle 123 is provided on the rear cover 12, the buckle 123 occupies less space on the rear cover 12, which is conducive to reducing the thickness of the rear cover 12, thereby reducing the depth of the ventilation holes on the rear cover 12, reducing wind resistance, and simplifying the structure of the rear cover 12. Of course, in other embodiments, the buckle hole 1153 can also be provided on the rear cover 12, and the buckle 123 can be provided on the first step 115. In addition, buckles 123 may be provided on both the first step portion 115 (shell body 11 ) and the back cover 12 , and the buckles 123 on the first step portion 115 (shell body 11 ) and the buckles 123 on the back cover 12 may be engaged with each other.

[0058] In some embodiments, the first step 115 includes at least one forward convex section 1151 and at least one rearward convex section 1152. The forward convex section 1151 is arranged to protrude relative to the rearward convex section 1152 toward the air outlet 102. The forward convex sections 1151 and the rearward convex sections 1152 are alternately distributed along the circumference of the mounting opening 101, and the peripheral edge of the rear cover 12 is adapted to be mounted on the forward convex sections 1151 and the rearward convex sections 1152. Specifically, the first step 115 is a continuous annular structure, and the forward convex section 1151 and the rearward convex section 1152 are both arranged in an arc shape, that is, the forward convex section 1151 is arranged in a convex arc shape that protrudes toward the air outlet 102, and the rearward convex section 1152 is arranged in a convex arc shape that protrudes away from the air outlet 102. The front convex sections 1151 and the rear convex sections 1152 are alternately distributed along the circumference of the mounting opening 101, which is equivalent to the first step portion 115 forming a wavy structure along the circumference of the mounting opening 101. This increases the contact area between the housing 10 and the rear cover 12, and improves the installation stability of the rear cover 12. The number of front convex sections 1151 can be one, two, three, or more, and the number of rear convex sections 1152 is the same as the number of front convex sections 1151.

[0059] In some embodiments, the first step 115 comprises at least two forward convex sections 1151 disposed on opposite sides of the mounting opening 101. Both forward convex sections 1151 are provided with a snap-fitting hole 1153. A portion of the rear cover 12 corresponding to the forward convex sections 1151 is provided with a latch 123 extending toward the snap-fitting hole 1153. A snap-fitting protrusion 1154 is provided on the wall of the two snap-fitting holes 1153, which are spaced apart from each other. The latch 123 is snap-fitted to the snap-fitting protrusion 1154, and a movable space is formed between the side of the latch 123 facing away from the snap-fitting protrusion 1154 and the wall of the snap-fitting hole 1153. Specifically, in this embodiment, the first step 115 comprises two forward convex sections 1151 and two rearward convex sections 1152. The two forward convex sections 1151 and the two rearward convex sections 1152 are alternately distributed along the circumference of the mounting opening 101, and the two forward convex sections 1151 are disposed on opposite sides of the mounting opening 101. The two front protrusion sections 1151 are each provided with a buckle hole 1153 , and the rear cover 12 is provided with a buckle 123 corresponding to each buckle hole 1153 .

[0060] By providing the engaging protrusions 1154 on the mutually spaced walls of the two engaging holes 1153, when the buckle 123 extends into the engaging hole 1153 and engages with the engaging protrusions 1154, the buckle 123 can be spaced from the other wall of the corresponding engaging hole 1153 (the wall opposite to the wall where the engaging protrusions 1154 are located), thereby forming a movable space for the buckle 123 to deform. That is, when the back cover 12 needs to be removed, the portion of the back cover 12 corresponding to the two front protrusions 1151 can be pressed to move the buckle 123 into the movable space, thereby disengaging the buckle 123 from the engaging protrusions 1154. After the buckle 123 disengages from the engaging protrusions 1154, the back cover 12 can be removed. This can prevent the rear cover 12 from being pulled off by force, reduce wear on the buckle 123 and the engaging protrusion 1154, help extend the service life of the rear cover 12, and make it easier for the user to disassemble and assemble. This can also hide the buckle 123 and the engaging hole 1153 inside, preventing them from being exposed to the outside and accumulating dust, being scratched, or affecting the appearance. The buckle 123 has various structures. For example, in one embodiment, the buckle 123 is provided with a locking hole 124, and the engaging protrusion 1154 is engaged with the locking hole 124. In another embodiment, the buckle 123 is provided with a locking protrusion, which abuts the side of the engaging protrusion 1154 facing the air outlet 102.

[0061] In some embodiments, one of the first step 115 and the back cover 12 is provided with a positioning hole 1155, and the other is provided with a positioning protrusion 125, which engages with the positioning hole 1155. This arrangement facilitates precise positioning and installation of the case body 11 and the back cover 12, increases the contact area between the back cover 12 and the case body 11, and improves the installation stability of the back cover 12. In this embodiment, the back cover 12 is provided with a positioning protrusion 125, and the first step 115 is provided with a positioning hole 1155. Compared with the structure of the positioning hole 1155, the size of the positioning protrusion 125 is smaller. By setting the positioning hole 1155 on the shell body 11, the space on the shell body 11 can be fully utilized to set the positioning hole 1155, so that the structural strength at the positioning hole 1155 is higher. When the positioning protrusion 125 is set on the back cover 12, the positioning protrusion 125 occupies a smaller space on the back cover 12, which is conducive to reducing the thickness of the back cover 12, thereby making the hole depth of the ventilation hole on the back cover 12 smaller, reducing wind resistance, and simplifying the structure of the back cover 12.

[0062] In some embodiments, a second step 116 is provided on the portion of the first step 115 near the mounting opening 101. The second step 116 surrounds the mounting opening 101, and the periphery of the first filter 70 rests on the second step 116. Specifically, the depth of the second step 116 relative to the first step 115 is roughly equivalent to the thickness of the periphery of the first filter 70, effectively overlapping the periphery of the first filter 70 with the second step 116. Thus, when the periphery of the first filter 70 is correspondingly engaged with the second step 116, the outer surface of the first filter 70 is substantially flush with the surface of the first step 115. This prevents interference between the first filter 70 and the rear cover 12.

[0063] In some embodiments, the shell body 11 includes a first shell 117 and a second shell 118, which are assembled to form the installation port 101 and the air outlet 102. Specifically, the first shell 117 and the second shell 118 are both integrally arranged, and the first shell 117 and the second shell 118 are assembled together to form the air cylinder 20 portion 111 and the handle portion 112. During installation, the internal structures such as the air cylinder 20, the fan assembly 40 and the heating assembly 60 can be first installed in the first shell 117 or the second shell 118, and then the first shell 117 and the second shell 118 can be assembled. This can facilitate the assembly of the internal structures such as the fan assembly 40 and the heating assembly 60, and can also stabilize the connection structure between the air cylinder 20 portion 111 and the handle portion 112. Of course, in other embodiments, the shell body 11 includes a cylinder and a handle that are separately arranged, and the handle is installed on one side of the cylinder. The cylinder is formed with an air inlet 121 and an air outlet 102.

[0064] In some embodiments, the shell body 11 includes a first shell 117 and a second shell 118. The first shell 117 and the second shell 118 are assembled to form an air inlet 121, an air outlet 102 and a snap-on hole 1153. The first shell 117 and the second shell 118 are each provided with a snap-on protrusion 1154 in the snap-on hole 1153. The snap 123 is provided in the snap-on hole 124. The two snap-on protrusions 1154 in the snap-on hole 1153 are snap-on to the snap-on hole 124. That is, the portion where the first shell 117 and the second shell 118 are joined to form the snap-fitting hole 1153 is each provided with a snap-fitting protrusion 1154. The snap-fitting protrusions 1154 on the first shell 117 and the snap-fitting protrusions 1154 on the second shell 118 are adjacent to or abut against each other. When the back cover 12 is mounted on the housing body 11, the snap-fitting protrusions 1154 on the first shell 117 and the snap-fitting protrusions 1154 on the second shell 118 are simultaneously snapped into the snap-fitting holes 124 of the snaps 123. This helps to improve the snap-fitting stability of the back cover 12.

[0065] In some embodiments, the air duct 20 includes a first barrel 23 and a second barrel 24 that are connected, the first barrel 23 and the second barrel 24 together forming the main air duct 21, the second barrel 24 being arranged relative to the first barrel 23 near the air outlet 102, the first barrel 23 being provided with a blower assembly 40, and the second barrel 24 being provided with a heating assembly 60. That is, during installation, the blower assembly 40 can be first installed in the first barrel 23, the heating assembly 60 can be installed in the first barrel 23, and then the first barrel 23 and the second barrel 24 can be connected, which facilitates the installation of the heating assembly 60 and the blower assembly 40 and simplifies the assembly difficulty of the hair dryer. Of course, in other embodiments, the air duct 20 includes two semicircular shells, which are spliced ​​together to form the main air duct 21, and the splicing surface of the two semicircular shells extends along the extension direction of the main air duct 21.

[0066] In some embodiments, the first cylinder 23 includes two spliced ​​shells 231, which are spliced ​​together to form the inner cavity of the first cylinder 23. The inner cavity wall of the first cylinder 23 is provided with a mounting groove 232, and the fan assembly 40 is installed in the mounting groove 232. Specifically, the splicing surface of the two spliced ​​shells 231 extends along the extension direction of the main air duct 21. The two spliced ​​shells 231 are each formed with a groove. The grooves in the two spliced ​​shells 231 are spliced ​​together to form the mounting groove 232. The mounting groove 232 is spaced apart from the two ends of the first cylinder 23. The fan assembly 40 includes a mounting cylinder 41, a motor 42 installed in the mounting cylinder 41, and a fan blade 43 for mounting the rotor of the motor 42. The mounting cylinder 41 is correspondingly installed in the mounting groove 232. That is, during installation, the installation cylinder 41 of the fan assembly 40 can be first placed in the groove of one of the splicing shells 231, and then the other splicing shell 231 can be placed to cover the fan assembly 40, so that the two splicing shells 231 are fixed, thereby achieving the installation of the first cylinder 23 and the fan assembly 40. This makes the installation of the fan assembly 40 more convenient, avoids the need to set up additional fixing parts for the fan assembly 40, and helps to simplify the structure and assembly difficulty of the hair dryer. Of course, in other embodiments, the first cylinder 23 can also be a complete cylinder structure, and the installation cylinder 41 can be inserted into the first cylinder 23 with an interference fit.

[0067] In some embodiments, the second filter screen 80 is provided with a connecting flange 83 around its periphery. The connecting flange 83 engages within the mounting groove 232 and abuts the sidewall of the mounting groove 232 near the air inlet 121. The fan assembly 40 abuts the side of the connecting flange 83 facing away from the air inlet 121. Specifically, the second filter screen 80 includes an annular circumferential wall 81, a bottom wall 82 covering one end of the annular circumferential wall 81, and a connecting flange 83 connected to the other end of the annular circumferential wall 81. The connecting flange 83 engages within the mounting groove 232. The annular circumferential wall 81 is located on the side of the first barrel 23 facing the air inlet 121. The fan assembly 40 abuts the side of the connecting flange 83 facing away from the air inlet 121. This allows the fan assembly 40 and the mounting groove 232 to jointly secure the second filter screen 80, reducing the number of fixing components for the second filter screen 80 and simplifying the structure of the hair dryer. Of course, in other embodiments, the second filter screen 80 can also be secured to the end of the first barrel 23 using screws or a snap-fit ​​structure.

[0068] In some embodiments, at least the portion of the main air duct 21 near the air outlet 102 is converging. This can increase the wind speed at the air outlet 102, thereby increasing the air velocity and volume. Of course, in other embodiments, the main air duct 21 can also be straight.

[0069] In some embodiments, the hair dryer 20 is provided with an installation opening, and the housing 10 is provided with a handle extending laterally. The hair dryer includes a circuit board 50, which is located within the handle and extends from the installation opening into the main air duct 21 for electrical connection to the blower assembly 40. The circuit board 50 and the installation opening are sealed. Specifically, the circuit board 50 is part of the electronic control device. The portion of the circuit board 50 extending into the main air duct 21 is provided with circuitry, and the blower assembly 40 is connected to this circuitry, thereby facilitating electrical connection of the blower assembly 40. Furthermore, the sealed connection between the circuit board 50 and the installation opening prevents airflow from the main air duct 21 from leaking between the circuit board 50 and the installation opening, thereby preventing air leakage from the main air duct 21. Optionally, the circuit board 50 and the installation opening are sealed with a sealing ring to facilitate disassembly and maintenance. Of course, in other embodiments, the circuit board 50 and the installation opening may also be sealed with a sealant. Furthermore, in other embodiments, the circuitry of the blower assembly 40 may extend from the end of the main air duct 21.

[0070] In some embodiments, the hair dryer further includes a nozzle 30. The housing 10 (housing body 11) is provided with a vent 104 (the number of vents 104 may be one or more) on a side surface near the air outlet 102. The air cylinder 20 is at least partially located at the air outlet 102. A guide air duct 22 is formed between the air cylinder 20 and the housing 10, connecting the vent 104 and the air outlet 102. The nozzle 30 is detachably mounted on the outer surface of the air cylinder 20 to separate the main air duct 21 from the guide air duct 22.

[0071] That is, the hair dryer has at least one nozzle 30, and the nozzle 30 can be of various types. For example, the nozzle 30 can be a flat-head nozzle 30 (air-collecting nozzle 30), or the nozzle 30 can be a diffusion nozzle 30 (combing nozzle 30), or the nozzle 30 can be straight-cylinder shaped, etc.

[0072] The outer diameter of the air duct 20 is roughly equivalent to the inner diameter of the air nozzle 30, so that the air nozzle 30 can be slightly interference fit on the outer side of the air duct 20 to ensure a seal between the air nozzle 30 and the air duct 20, thereby preventing external airflow from flowing from between the air nozzle 30 and the air duct 20 to the air outlet 102 when the air nozzle 30 is installed.

[0073] When the air nozzle 30 is not installed at the air outlet 102, the fan assembly 40 drives the outlet airflow out of the air outlet 102. Due to the Venturi effect, the outlet airflow can drive the air around the hair dryer through the vent 104 and into the guide air duct 22, forming a traction airflow that flows through the guide air duct 22 and out of the air outlet 102. This allows the traction airflow to be blown out together with the outlet airflow, which is equivalent to entraining the traction airflow with the outlet airflow. This can increase the air output of the hair dryer without increasing the power and size of the fan, allowing the user to dry their hair in a shorter time, and also helps reduce the weight and size of the hair dryer.

[0074] When the nozzle 30 is mounted on the air duct 20, the main air duct 21 and the guide air duct 22 can be separated by the nozzle 30, thereby avoiding the generation of traction airflow, so that the air volume blown out from the air outlet 102 is roughly equal to the air volume entering from the air inlet 121. Moreover, when the nozzle 30 is a concentrating nozzle 30, the resistance effect caused by the small size of the nozzle 30 outlet end, which causes the outlet air flow to flow out of the guide air duct and the vent 104, can be avoided, thereby preventing the loss of the outlet airflow.

[0075] That is, by positioning the hair dryer 20 at least partially at the air outlet 102, and forming a guide air duct 22 between the hair dryer 20 and the housing 10, which is in communication with the air outlet 102 of the housing 10, and providing a vent 104 on the side of the housing 10 near the air outlet 102, when the blower assembly 40 drives the outlet airflow out of the air outlet 102, the Venturi effect drives the air around the hair dryer to flow into the guide air duct 22 through the vent 104, forming a traction airflow that flows out of the air outlet 102 after passing through the vent 104. This allows the traction airflow to be blown out together with the outlet airflow, thereby increasing the air output of the hair dryer without increasing the power and size of the blower, allowing the user to dry their hair in a shorter time, and also helping to reduce the weight and volume of the hair dryer. When the nozzle 30 is mounted on the outer side of the hair dryer 20 so that the air flow passes through the nozzle 30, the air flow state of the hair dryer can be changed by the nozzle 30. That is, the user can change the air flow state of the hair dryer by installing the nozzle 30, so that the hair dryer has at least one state of blowing air directly from the air outlet 102 of the housing 10 (without the nozzle 30 installed) and one state of blowing air through the nozzle 30 after the nozzle 30 is installed, so that the user can adjust the air flow state of the hair dryer according to different air flow needs.

[0076] Moreover, when the main air duct 21 and the guide air duct 22 are separated by arranging the air nozzle 30 on the outer side surface of the air duct 20, compared with the method of inserting the air nozzle 30 from the air outlet 102 so that the outer peripheral surface of the air nozzle 30 fits with the inner wall surface of the shell 10 to block the vent 104, the size of the air duct 20 is smaller than that of the shell 10, and the molding accuracy is easy to control, so that the matching accuracy of the air duct 20 and the air nozzle 30 is higher, and the tightness between the air nozzle 30 and the air duct 20 is improved, thereby improving the sealing performance between the air nozzle 30 and the air duct 20, and making the air nozzle 30 stably installed, reducing the risk of the air nozzle 30 falling off during use.

[0077] In some embodiments, the air nozzle 30 includes a sleeve section 31 and an air guide section 32 that are connected. The sleeve section 31 is detachably mounted on the outer side of the air cylinder 20. The length of the sleeve section 31 is less than the length of the air guide duct 22, and at least part of the vents 104 are located on the side of the sleeve section 31 away from the air guide section 32. That is, when the sleeve section 31 is mounted on the outer side of the air cylinder 20 so as to be located within the air guide duct 22, at least part of the vents 104 can be connected to the air guide duct 22. In this way, when the heating assembly 60 in the hair dryer is in operation, heat can be dissipated through the air guide duct 22 and the vents, thereby reducing the risk of the air nozzle 30 falling off due to deformation caused by heat.

[0078] In some embodiments, the outer side of the air duct 20 is a complete surface of revolution. This increases the contact area between the air nozzle 30 and the air duct 20, resulting in a tighter fit, improved sealing performance between the air nozzle 30 and the air duct 20, and more stable installation of the air nozzle 30. Of course, in other embodiments, multiple guide grooves may be distributed along the circumference of the outer side of the air duct 20 to increase the cross-sectional area of ​​the guide air duct 22. When the air nozzle 30 is installed, the air nozzle 30 covers the guide grooves to separate the guide grooves from the vent 104.

[0079] In some embodiments, at least one of the inner side of the housing 10 and the outer side of the air duct 20 is provided with a baffle ring 113. The baffle ring 113 is disposed around the outer periphery of the air duct 20 and is located on the side of the vent 104 away from the air outlet 102. Specifically, the baffle ring 113 is located between the inner side of the housing 10 and the outer side of the air duct 20 to block air flow from between the inner side of the housing 10 and the outer side of the air duct 20 toward the air inlet 121. This structure is simple and easy to manufacture. Of course, in other embodiments, the inner side of the housing 10 and the outer side of the air duct 20 may also be in direct contact.

[0080] In some embodiments, at least one of the housing 10 and the air duct 20 is integrally formed with a retaining ring 113. This can reduce the number of parts of the hair dryer, reduce the installation steps of the retaining ring 113, simplify the assembly process of the hair dryer, and reduce costs. In this embodiment, the inner side of the housing 10 is integrally formed with a retaining ring 113, and the inner side of the retaining ring 113 abuts the outer side surface of the air duct 20. In another embodiment, the outer side surface of the air duct 20 is integrally formed with a retaining ring 113, and the outer side of the retaining ring 113 abuts the inner side of the housing 10. In other embodiments, the housing 10 and the air duct 20 are both integrally formed with a retaining ring 113, the inner side of the retaining ring 113 on the housing 10 abuts the outer side surface of the air duct 20, the outer side of the retaining ring 113 on the air duct 20 abuts the inner side of the housing 10, and the retaining ring 113 on the housing 10 and the retaining ring 113 on the air duct 20 are distributed along the axial direction of the air duct 20. In addition, in other embodiments, the retaining ring 113 may also be provided independently, for example, the retaining ring 113 is a sealing ring.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present description and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A hair dryer, characterized in that: include: A housing, wherein one end of the housing is provided with an air outlet, and the other end is provided with a convex arc surface that rises in a direction away from the air outlet, and the convex arc surface is provided with a plurality of air inlets; an air duct installed in the housing and having a main air duct communicating with the air inlet and the air outlet; a fan assembly installed in the main air duct, the fan assembly being configured to drive airflow from the air inlet through the main air duct to the air outlet; as well as a heating assembly, the heating assembly being arranged in the main air duct and between the fan assembly and the air outlet; The housing includes a housing body and a back cover, one end of the housing body is provided with the air outlet, and the other end is provided with a mounting opening, the air duct is installed in the housing body, the main air duct is connected to the air inlet and the mounting opening, and the back cover is detachably covered on the mounting opening and is formed with the convex arc surface and the air inlet; The hair dryer further includes a first filter screen, wherein the first filter screen cover is disposed at the mounting opening, and the rear cover is disposed outside the first filter screen to confine the first filter screen to the housing body; A support grille is provided on the housing body at the mounting opening. The support grille is mainly composed of crisscross support bars. The support grille is raised in a direction away from the mounting opening to press the first filter screen onto the inner side of the rear cover. The support grille and the rear cover jointly clamp the first filter screen. The hair dryer further includes a second filter, which is mounted on the air cylinder and covers the main air duct; the second filter is arranged to be tapered away from the air outlet; The aperture of the through holes on the second filter screen is smaller than the aperture of the through holes on the first filter screen.

2. The hair dryer according to claim 1, wherein The second filter includes an annular circumferential wall, a bottom wall covering one end of the annular circumferential wall, and a connecting flange connected to the other end of the annular circumferential wall, the connecting flange is connected to the air duct, the annular circumferential wall is located on the side of the air duct facing the air outlet, and the annular circumferential wall and the bottom wall are both provided with a plurality of through holes; the diameter of the annular circumferential wall is arranged to decrease in the direction close to the air outlet.

3. The hair dryer according to claim 1, wherein The shell body is provided with a first step portion at the edge of the mounting opening. The first step portion surrounds the mounting opening and is recessed relative to the outer surface of the shell body. The periphery of the rear cover is engaged with the first step portion. The first step portion includes at least one front convex section and at least one rear convex section. The front convex section is protruded toward the air outlet relative to the rear convex section. The front convex section and the rear convex section are alternately distributed along the circumference of the installation opening.

4. The hair dryer according to claim 1, wherein The air duct includes a first cylinder and a second cylinder connected to each other, the first cylinder and the second cylinder together form the main air duct, the second cylinder is arranged close to the air outlet relative to the first cylinder, the fan assembly is arranged in the first cylinder, and the heating assembly is arranged in the second cylinder.

5. The hair dryer according to claim 4, wherein The first cylinder includes two spliced ​​shell parts, which are spliced ​​together to form an inner cavity of the first cylinder. The inner cavity wall of the first cylinder is provided with a mounting groove, and the fan assembly is installed in the mounting groove.

6. The hair dryer according to claim 5, wherein The hair dryer also includes a second filter, which includes an annular circumferential wall, a bottom wall covering one end of the annular circumferential wall, and a connecting flange connected to the other end of the annular circumferential wall, the connecting flange being stuck in the mounting groove, the annular circumferential wall being located on the side of the first cylinder facing the air inlet, and the fan assembly abuts against the side of the connecting flange facing away from the air inlet.

7. The hair dryer according to any one of claims 1 to 6, characterized in that At least the air duct portion close to the air outlet in the main air duct is contracted; and / or The hair dryer is provided with an installation opening, the shell is provided with a handle extending laterally, the hair dryer includes a circuit board, the circuit board is arranged in the handle, and extends from the installation opening into the main air duct for electrical connection of the blower assembly, and the circuit board and the installation opening are sealed.

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