Hair drier

Abstract

The utility model discloses a hair drier, which belongs to the field of life electric appliances, solves the problem of high noise at the air inlet end of the hair drier, and adopts the technical scheme that the hair drier mainly comprises a casing, a motor and fan blades which are arranged in the casing, a side air inlet hole formed in the peripheral side surface of the rear end of the casing, and a rear air inlet hole formed in the rear end surface of the casing, the motor drives the fan blades to enable air to flow into the machine shell through the side air inlet holes and the rear air inlet holes, the rear end of the machine shell is provided with an air inlet cover plate, the air inlet cover plate covers the rear air inlet holes to enable the air inlet amount of the rear air inlet holes to be reduced to balance the air inlet amount of the side air inlet holes, and a rear air inlet channel communicated with the rear air inlet holes is formed between the air inlet cover plate and the rear end face of the machine shell. And the rear air inlet channel bends and extends. The noise reduction device is mainly used for effectively reducing noise.

Description

Technical Field

[0001] The utility model relates to the field of household appliances, in particular to a hair dryer. Background Art

[0002] Hair dryers are small appliances used for quick hair drying. The main noise sources are the motor's operating noise and the airflow's noise through the duct. Airflow noise is particularly prominent in straight-flow duct designs, which lack effective buffering and dispersion mechanisms to reduce the impact of airflow.

[0003] For example, prior art CN114727692A discloses a hair dryer comprising a rear suction opening and side openings. The principle is as follows: multiple side openings are formed on the side walls of the front portion of the main body. The air flow flowing out of the inner diffuser at high speed and the subsequent local pressure reduction at the output of the inner diffuser generate air entrainment, causing air to be drawn from the outside of the hair dryer toward the inside of the main passage cavity. The rear suction opening actively draws in air, while air around the side openings is passively drawn in through side air inlets on the outer periphery of the main body. However, this suction method results in inconsistent air intake volumes and air flow rates at the rear suction opening and the side openings, exacerbating noise problems inside the hair dryer due to uneven airflow. Utility Model Content

[0004] The purpose to be achieved by the utility model is to provide a hair dryer, which solves the problem of high noise of the air intake of the hair dryer and achieves the effect of effectively reducing the noise.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a hair dryer, comprising a casing, a motor arranged in the casing, a fan blade, a side air inlet arranged on the outer peripheral side of the rear end of the casing, and a rear air inlet arranged on the rear end face of the casing. The motor drives the fan blade to make air flow into the casing through the side air inlet and the rear air inlet. An air inlet cover is provided at the rear end of the casing. The air inlet cover covers the rear air inlet to reduce the air intake of the rear air inlet to balance the air intake of the side air inlet. A rear air inlet channel connected to the rear air inlet is formed between the air inlet cover and the rear end face of the casing, and the rear air inlet channel is curved and extended.

[0006] After adopting the above technical solution, the utility model has the following advantages: the motor arranged in the casing drives the fan blades to rotate at a high speed, and the fan blades drive the air to generate an air flow, and the rotation of the fan blades causes the air flow generated in the axial direction to actively enter from the rear air inlet hole arranged at the rear end of the casing, so that the air on the periphery of the rear end of the casing is passively sucked in from the side air inlet holes on the side surfaces of the outer periphery of the rear end of the casing. During the high-speed operation of the fan blades, if the air intake of the rear air inlet hole is too large, the air flow rate at the side air inlet hole and the air flow rate at the rear air inlet hole will be quite different, generating vortex in the hair dryer, so an air inlet cover is provided at the rear end of the casing, and the rear air inlet hole is covered by the air inlet cover to reduce the air intake of the rear air inlet hole as much as possible. The possible balance of air intake volume with the side air inlet can reduce the speed difference between the airflow inhaled by the rear air inlet and the airflow inhaled by the side air inlet, which is beneficial to the buffering and mixing of the two airflows and reduces the generation of vortices, thereby achieving the purpose of reducing noise; the rear air inlet channel is formed by the rear end face of the casing and the air inlet cover to form a curved and extended air inlet structure, for example, an S-shaped maze channel can be formed. The curved rear air inlet channel can extend the air flow path, so that the airflow can reverse flow multiple times in the rear air inlet channel, and the air intake volume and air intake speed can be reduced. It can also block foreign matter such as hair and dust from directly entering the hair dryer to a certain extent, reducing the possibility of machine failure and damage due to the inhalation of foreign matter.

[0007] Furthermore, the air inlet cover is provided with an annular groove on the side facing the rear end face of the casing, and the rear end face of the casing is provided with an annular rib, which is inserted into the annular groove and forms a curved rear air inlet channel between the outer wall of the annular rib and the inner wall of the annular groove, and the rear air inlet holes are distributed within the range surrounded by the annular rib.

[0008] By adopting the above-mentioned technical solution, an annular rear air inlet channel is formed between the outer wall of the annular rib and the inner wall of the annular groove, which can achieve 360-degree air intake, and the rear air inlet holes are distributed within the range surrounded by the annular rib, so that the airflow must pass through the rear air inlet channel before entering the rear air inlet holes, which can extend the air flow path, not only helps to reduce the spread of noise, but also can guide the air to make the airflow smoother, ensure the stability of the airflow inside the hair dryer, improve the blowing effect, and make the wind force more uniform.

[0009] Furthermore, an outer ring rib and an inner ring rib are provided on one side of the air inlet cover plate facing the rear end surface of the casing, and an annular groove is formed between the outer ring rib and the inner ring rib.

[0010] By adopting the above-mentioned technical solution, the outer ring ribs and the inner ring ribs can improve the overall structural strength of the air inlet cover, making it more sturdy and durable, which is conducive to forming a rear air inlet channel with uniform size and improving the stability of air flow.

[0011] Furthermore, the rear end surface of the housing is provided with support ribs, and the support ribs cooperate with the inner ring ribs.

[0012] The aforementioned technical solution, combined with the inner ring ribs, enhances the structural stability of the rear end of the housing. The support ribs provide additional support, ensuring the air intake cover remains stable under the influence of the incoming airflow, effectively preventing the air intake cover from vibrating when air enters.

[0013] Furthermore, the support rib is an annular structure, and the support rib is connected to the rear end face of the casing by a first connecting rib, and the first connecting rib extends backward from the rear end face of the casing to the support rib, so that a ventilation gap is formed between the support rib and the rear end face of the casing; and / or, the side of the air inlet cover facing the rear end face of the casing and one of the support ribs is provided with a limiting groove, and the other is provided with a limiting convex rib, and the limiting convex ribs are inserted into the limiting groove to cooperate with each other.

[0014] With the aforementioned technical solution, the support ribs of the annular structure not only provide stable support for the air inlet cover, but are also connected to the rear end face of the casing through the first connecting rib, thereby enhancing the stability of the entire structure. Furthermore, the support ribs can be installed and positioned more conveniently, simplifying the installation process. The support ribs are connected to the rear end face of the casing through the first connecting ribs and extend backward to the support ribs, forming a ventilation gap between them, which facilitates smoother air flow from the rear air inlet channel into the rear air inlet hole, reducing resistance to air flow. A limiting groove and a limiting rib are used between the side of the air inlet cover facing the rear end face of the casing and the support ribs, ensuring that the air inlet cover can be accurately positioned during installation, and the limiting ribs are inserted into the limiting grooves to achieve fixation, thereby avoiding loosening or misalignment problems caused by improper installation. At the same time, the installation process of the air inlet cover is simplified. The operator only needs to align the limiting ribs with the limiting grooves and insert them, without the need for complex adjustment or fixing operations. This also facilitates subsequent maintenance and replacement work, reducing maintenance costs and time.

[0015] Furthermore, the rear end surface of the housing is concave forward from the edge to the center to form a cavity for accommodating the air inlet cover plate, and the annular rib is located in the cavity.

[0016] With the aforementioned technical solution, the annular ribs provided on the concave cavity further enhance the connection strength between the air inlet cover and the housing, preventing loosening or falling off due to vibration or external force during use, thereby improving the overall structural stability of the hair dryer. Through the design of the concave cavity and the annular ribs, the curvature of the rear air inlet channel is increased, lengthening the air flow path and area within the concave cavity, causing the air to be more reflected and attenuated during the flow process, thereby further reducing the propagation of noise. On the other hand, the concave cavity can also serve as a sound insulation structure to reduce the propagation of noise from the rear end of the housing to the outside. While maintaining sufficient air intake, the noise generated by air flow is effectively reduced, thereby improving the noise reduction performance of the hair dryer. At the same time, the concave cavity can accommodate the air inlet cover, preventing the air inlet cover from scratching against other objects during use.

[0017] Furthermore, the rear end face of the casing is provided with a first positioning portion, and the side of the air inlet cover plate facing the rear end face of the casing is provided with a second positioning portion that cooperates with the first positioning portion, and the rear air inlet holes are distributed on the outer peripheral side of the first positioning portion.

[0018] By adopting the above-mentioned technical solution, the cooperative connection between the first positioning part and the second positioning part ensures that the air inlet cover can be accurately installed on the rear end face of the casing, which not only ensures a firm connection and reduces the risk of loosening and falling off, but also the rear air inlet holes are distributed on the outer peripheral side of the first positioning part, which can also play a role in uniform air intake, so that the air enters the interior of the hair dryer more evenly, reducing noise transmission.

[0019] Furthermore, the first positioning portion is connected to the housing via at least two second connecting ribs, the second connecting ribs are distributed around the periphery of the first positioning portion, and rear air inlet holes are formed between circumferentially adjacent second connecting ribs.

[0020] By adopting the above-mentioned technical solution, the first positioning portion is connected to the casing through at least two second connecting ribs, and a rear air inlet hole is formed between the circumferentially adjacent second connecting ribs. While enhancing the overall structural strength of the rear end face of the casing, it also allows air to enter the interior of the hair dryer more smoothly and evenly.

[0021] Furthermore, a reinforcing rib is provided between the outer periphery of the second positioning portion and the air inlet cover plate, and an avoidance groove for avoiding the reinforcing rib is provided on the second connecting rib.

[0022] The aforementioned technical solution enhances the structural strength of the connection between the air inlet cover and the second positioning portion, ensuring a secure connection between the air inlet cover and the housing. The avoidance groove allows the rib to more easily fit into the desired position between the air inlet cover and the second positioning portion without blocking air ingress, improving assembly efficiency and reducing performance issues caused by improper assembly.

[0023] Furthermore, the casing includes a front shell and a rear end cover, the rear end cover is installed at the rear end of the front shell and is provided with side air inlet holes and rear air inlet holes, a mounting bracket for installing the motor is provided in the casing, the rear end of the mounting bracket is provided with a first magnetic component, and the rear end cover is provided with a second magnetic component attracted to the first magnetic component, the fastener passes through the first positioning part and is connected to the second positioning part to fix the air inlet cover to the rear end cover, and the fastener simultaneously fixes the second magnetic component to the rear end cover.

[0024] By adopting the above-mentioned technical solution, the casing is set into a split form of a front shell and a rear end cover, which is convenient for assembly and maintenance. The magnetic connection between the first magnetic part and the second magnetic part enables quick connection and disconnection of the mounting bracket and the rear end cover. The operation is simple and quick, and the magnetic connection has the characteristics of automatic positioning and adsorption, which can automatically align and reduce the possibility of misinsertion. While the fastener passes through the first positioning part and the second positioning part, it also fixes the second magnetic part, avoiding the second magnetic part from falling off, and at the same time fixes the connection between the casing and the air inlet cover. When disassembly or maintenance is required, the front and rear ends of the hair dryer can be separated by first disconnecting the connection between the magnetic parts, and then loosening the fastener to separate the casing from the air inlet cover, which is convenient for maintenance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1 This is an overall schematic diagram of a hair dryer according to the present invention;

[0027] Figure 2 This is a partial cross-sectional schematic diagram of a hair dryer of the present invention;

[0028] Figure 3 This is a schematic diagram of a rear air inlet channel of a hair dryer according to the present invention;

[0029] Figure 4 This is a schematic diagram of the rear end of a hair dryer according to the present invention;

[0030] Figure 5 This is a schematic diagram of an air inlet cover of a hair dryer according to the present invention;

[0031] Figure 6 This is a front end schematic diagram of a hair dryer according to the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0033] The terms "first," "second," and so on (if any) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or precedence. Even if "second" is used before a technical feature to distinguish it, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. It should be understood that in this utility model, "plurality" refers to two or more. "And / or" is merely a description of an association between related objects, indicating that three relationships can exist. For example, "X and / or Y" can mean: X exists alone, X and Y exist simultaneously, or Y exists alone. The character " / " generally indicates that the related objects are in an "or" relationship. "Including X, Y, and Z" means that all three of X, Y, and Z are included. "Including X, Y, or Z" means that one of X, Y, and Z is included. "Including X, Y, and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0034] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0035] like Figure 2 As shown, the utility model provides a hair dryer, including a casing 1, a motor 2 arranged in the casing 1, a fan blade 3, a side air inlet 11 arranged on the outer peripheral side of the rear end of the casing 1, and a rear air inlet 12 arranged on the rear end surface 14 of the casing 1. The motor 2 drives the fan blade 3 to allow air to flow into the casing 1 through the side air inlet 11 and the rear air inlet 12. The rear end of the casing 1 is provided with an air inlet cover 13, the air inlet cover 13 covers the rear air inlet 12 to reduce the air intake of the rear air inlet 12 to balance the air intake of the side air inlet 11, and a rear air inlet channel connected to the rear air inlet 12 is formed between the air inlet cover 13 and the rear end surface 14 of the casing 1, and the rear air inlet channel is curved and extended.

[0036] The fan blades 3 are driven by the motor 2 in the housing 1 to rotate at a high speed, and the fan blades 3 drive the air to generate an air flow. The rotation of the fan blades 3 causes the air flow generated in the axial direction to actively enter from the rear air inlet holes 12 provided at the rear end of the housing 1, so that the air on the periphery of the rear end of the housing 1 is passively sucked in from the side air inlet holes 11 on the side surfaces of the rear end of the housing 1. Since the air intake of the rear air inlet holes 12 is too large during the high-speed operation of the fan blades 3, the air flow rate at the side air inlet holes 11 and the air flow rate at the rear air inlet holes 12 will be quite different, generating vortices in the hair dryer. Therefore, an air inlet cover 13 is provided at the rear end of the housing 1, which covers the rear air inlet holes 12 so that the air intake rate of the rear air inlet holes 12 is reduced to be as balanced as possible with the air intake rate of the side air inlet holes 11, thereby reducing the speed difference between the airflow inhaled by the rear air inlet holes 12 and the airflow inhaled by the side air inlet holes 11, which is conducive to the buffering and mixing of the two airflows, reducing the generation of vortices, and thus achieving the purpose of reducing noise. Figure 3 As shown by the arrow, the rear air inlet channel is formed by the rear end face 14 of the casing 1 and the air inlet cover 13 to form a curved and extended air inlet structure, for example, an S-shaped maze channel can be formed. The curved rear air inlet channel can extend the air flow path, so that the air flow can reverse flow multiple times in the rear air inlet channel, the air intake volume and air intake speed can be reduced, and it can also block foreign matter such as hair and dust from directly entering the hair dryer to a certain extent, reducing the possibility of machine failure and damage due to the inhalation of foreign matter.

[0037] Specifically, the housing 1 of the hair dryer is composed of three parts, namely:

[0038] A front housing 15 is located at the front end of the housing 1. The front housing 15 has a built-in motor 2 and fan blades 3. The motor 2 is a power source for driving the fan blades 3 to rotate at high speed to generate airflow.

[0039] The rear shell 17 is located at the rear end of the front shell 15. The outer peripheral side of the rear shell 17 has a side air inlet 11 to allow external air to enter the hair dryer. Optionally, the front shell 15 and the rear shell 17 can be integrally formed to avoid additional noise sources caused by vibration between the front shell 15 and the rear shell 17 during use and facilitate mold opening. The front shell 15 and the rear shell 17 can also be connected in a split manner, such as by snap-fitting or bolting. The split connection is convenient for disassembly and assembly, and when the hair dryer fails, it can be disassembled and repaired in time.

[0040] The rear end cover 16 is located at the rear end of the rear shell 17, and has a rear end surface 14 that is concave forward from the edge to the center. The part that is concave forward from the edge to the center forms a concave cavity 145 for accommodating the air inlet cover 13 located at the rear end of the casing 1. In this embodiment, the rear end cover 16 and the rear shell 17 are connected and fixed by snapping. The main purpose is to facilitate disassembly and timely inspection and maintenance of the interior of the hair dryer when a fault occurs inside the hair dryer. In other embodiments, the rear end cover 16 and the rear shell 17 can also be formed as one piece.

[0041] In one embodiment, it can be Figure 1 The hair dryer shown in the embodiment is described by taking a handheld hair dryer as an example, and also includes a handle 4 connected to the housing 1, the handle 4 is for the user to hold, the shape of the handle 4 can be set to be cylindrical, and it is more convenient to use by holding the handle 4. The housing 1 and the handle 4 can be set separately, but for convenience and beauty, an integrated type can also be selected. The handle 4 is provided with buttons 41 with different functions to control different functions of the hair dryer, such as: controlling the size of the blowing force, controlling the blowing temperature, and different usage modes for different hair qualities. A power cord 42 for powering the hair dryer is also connected under the handle 4.

[0042] A light source 43 may also be provided within the handle 4, electrically connected to the main control board. This light source 43 may be an LED light, with the light board disposed within the handle 4. During use, the LED light emits light. A light ring is visible from the button 41, allowing the user to determine the specific usage mode of the hair dryer based on the different colors of the light ring.

[0043] Specifically, such as Figure 2 As shown, the rear end face 14 of the casing 1 is provided with a first positioning portion 141. In this embodiment, the first positioning portion 141 is configured as an annular positioning portion, and the air inlet cover 13 is provided with a second positioning portion 131 that is coordinated and connected with the first positioning portion 141 on the side facing the rear end face 14 of the casing 1, and the rear air inlet holes 12 are distributed on the outer peripheral side of the first positioning portion 141.

[0044] It can be understood that the matching connection between the first positioning portion 141 and the second positioning portion 131 ensures that the air inlet cover 13 can be accurately installed on the rear end face 14 of the casing 1, which not only ensures a firm connection and reduces the risk of loosening and falling off, but also the rear air inlet holes 12 are distributed on the outer peripheral side of the first positioning portion 141, which can also play a role in uniform air intake, so that the air enters the interior of the hair dryer more evenly, reducing noise transmission.

[0045] In this embodiment, the first positioning portion 141 can be an annular structure, and the second positioning portion 131 can be a positioning rib that extends into and cooperates with the annular structure, so that the rear air intake holes 12 are distributed along the annular structure, making the amount of air entering from multiple directions more uniform, further reducing eddy currents, and for better positioning, pluggable or snap-on structures can also be provided on the first positioning portion 141 and the second positioning portion 131 respectively.

[0046] Specifically, such as Figure 4 As shown, the first positioning portion 141 is connected to the housing 1 through at least two second connecting ribs 142 , and the second connecting ribs 142 are distributed around the outer circumference of the first positioning portion 141 , and rear air inlet holes 12 are formed between circumferentially adjacent second connecting ribs 142 .

[0047] It can be understood that the first positioning portion 141 is connected to the casing 1 through at least two second connecting ribs 142, and a rear air inlet hole 12 is formed between the circumferentially adjacent second connecting ribs 142. While enhancing the overall structural strength of the rear end face 14 of the casing 1, it also allows air to enter the interior of the hair dryer more smoothly and evenly.

[0048] Preferably, the first positioning portion 141 may be connected to the housing 1 via a plurality of second connecting ribs 142 , for example, 4 or 5, so as to form a plurality of rear air inlet holes 12 of uniform size.

[0049] Further, such as Figure 4 and Figure 5 As shown, a reinforcing rib 132 is provided between the outer periphery of the second positioning portion 131 and the air inlet cover 13 , and an avoidance groove 1421 for avoiding the reinforcing rib 132 is provided on the second connecting rib 142 .

[0050] It is understood that the reinforcing rib 132 enhances the structural strength of the connection area between the air inlet cover 13 and the second positioning portion 131, ensuring a secure connection between the air inlet cover 13 and the housing 1. The avoidance groove 1421 allows the reinforcing rib 132 to be more easily inserted into the predetermined position between the air inlet cover 13 and the second positioning portion 131 without blocking air ingress, thereby improving assembly efficiency and reducing performance issues caused by improper assembly.

[0051] Further, such as Figure 2As shown, the casing 1 includes a front shell 15 and a rear end cover 16. The rear end cover 16 is installed at the rear end of the front shell 15 and is provided with a side air inlet 11 and a rear air inlet 12. A mounting bracket 5 for mounting the motor 2 is provided in the casing 1. The rear end of the mounting bracket 5 is provided with a first magnetic component 51. The rear end cover 16 is provided with a second magnetic component 161 that is attracted to the first magnetic component 51. The fastener 162 passes through the first positioning portion 141 and is connected to the second positioning portion 131 to fix the air inlet cover 13 to the rear end cover 16. The fastener 162 simultaneously fixes the second magnetic component 161 to the rear end cover 16.

[0052] It is understandable that the casing 1 is configured as a split form of a front shell 15 and a rear end cover 16 for ease of assembly and maintenance. The magnetic connection between the first magnetic member 51 and the second magnetic member 161 enables quick connection and disconnection of the mounting bracket 5 and the rear end cover 16. The operation is simple and quick, and the magnetic connection has the characteristics of automatic positioning and adsorption, which can automatically align and reduce the possibility of misinsertion. While the fastener 162 passes through the first positioning portion 141 and the second positioning portion 131, it also fixes the second magnetic member 161, thereby preventing the second magnetic member 161 from falling off, and at the same time fixes the connection between the casing 1 and the air inlet cover 13. When disassembly or maintenance is required, the front and rear ends of the hair dryer can be separated by first disconnecting the connection between the magnetic members, and then loosening the fastener 162 to separate the casing 1 from the air inlet cover 13, thereby facilitating maintenance of the product.

[0053] Preferably, the first magnetic member 51 may be a magnet block, the second magnetic member 161 may be a soft magnetic strip or a magnetic sheet, etc., and the fastener 162 may be a combination of a bolt and a screw. No specific limitation is made in this embodiment, and all methods that have the same fixing and limiting effect are within the protection scope of this embodiment.

[0054] Preferably, the fan housing should be made of a material with high hardness, high temperature resistance and good heat dissipation effect, such as ABS plastic or aluminum alloy.

[0055] Specifically, such as Figure 6 As shown, the motor 2 of the hair dryer adopts a brushless DC motor 2, which can provide smoother and stronger wind power. The hair dryer also has an electric heating element 6, which is located at the air outlet end 7 of the hair dryer. When the motor 2 is working, it will drive the fan blades 3 to rotate, inhale air and blow hot air out from the air outlet after being heated by the electric heating element 6. The electric heating element 6 can be an electric heating wire, and the material of the electric heating wire can be metal or ceramic, etc.

[0056] Specifically, the air outlet of the hair dryer has an annular air guide 8, and an annular air outlet 9 is formed between the annular air guide 8 and the front shell 15. When the wind is blown out from the rear end and reaches the annular air outlet 9, the air flow channel becomes narrower to increase its flow rate. This structure can not only buffer the temperature and strength of the wind in the annular air guide 8, but also increase the air outlet speed at the annular air outlet 9, thereby improving the drying effect.

[0057] In another embodiment, Figure 2 As shown, the air inlet cover 13 is provided with an annular groove 133 on the side facing the rear end face 14 of the casing 1, and the rear end face 14 of the casing 1 is provided with an annular rib 143. The annular rib 143 is inserted into the annular groove 133 and forms a curved rear air inlet channel between the outer wall of the annular rib 143 and the inner wall of the annular groove 133. The rear air inlet holes 12 are distributed within the range surrounded by the annular rib 143.

[0058] It can be understood that an annular rear air inlet channel is formed between the outer wall of the annular rib 143 and the inner wall of the annular groove 133, which can achieve 360-degree air intake, and the rear air inlet holes 12 are distributed within the range surrounded by the annular rib 143, so that the airflow must pass through the rear air inlet channel before entering the rear air inlet holes 12, which can extend the air flow path, not only helps to reduce the spread of noise, but also can guide the air to make the airflow smoother, ensure the stability of the airflow inside the hair dryer, improve the blowing effect, and make the wind force more uniform.

[0059] Specifically, such as Figure 2 and Figure 5 As shown, the air inlet cover plate 13 is provided with an outer ring rib 134 and an inner ring rib 135 on one side facing the rear end surface 14 of the casing 1 , and an annular groove 133 is formed between the outer ring rib 134 and the inner ring rib 135 .

[0060] It can be understood that the outer ring ribs 134 and the inner ring ribs 135 can improve the overall structural strength of the air inlet cover 13, making it more sturdy and durable, and are conducive to forming a rear air inlet channel with uniform size, thereby improving the stability of air flow.

[0061] Preferably, the groove wall of the annular groove 133 should be kept as smooth as possible, so that the airflow can flow more smoothly and reduce the airflow resistance.

[0062] Specifically, such as Figure 2 、 Figure 4 and Figure 5 As shown, the rear end surface 14 of the housing 1 is provided with support ribs 144 , and the support ribs 144 cooperate with the inner ring ribs 135 .

[0063] It is understood that the cooperation between the inner ring ribs 135 and the inner ring ribs 135 enhances the structural stability of the rear end surface 14 of the housing 1. The support ribs 144 provide additional support to ensure that the air inlet cover 13 remains stable under the action of the incoming air flow, effectively preventing the air inlet cover 13 from vibrating when the air enters.

[0064] Preferably, a step is provided on the inner annular rib 135 for abutting against the supporting rib 144, which reduces the connection gap, makes it more stable in the axial direction, and avoids shaking during use of the hair dryer and generating additional noise.

[0065] In one embodiment, Figure 4 As shown, the support rib 144 is an annular structure, and the support rib 144 is connected to the rear end face 14 of the casing 1 through a first connecting rib 146. The first connecting rib 146 extends backward from the rear end face 14 of the casing 1 to the support rib 144, so that a ventilation gap is formed between the support rib 144 and the rear end face 14 of the casing 1.

[0066] As will be appreciated, the annular support ribs 144 not only provide stable support for the air inlet cover 13 but also connect to the rear end 14 of the housing 1 via the first connecting ribs 146, enhancing the stability of the entire structure. They also facilitate installation and positioning, simplifying the installation process. The support ribs 144 are connected to the rear end 14 of the housing 1 via the first connecting ribs 146 and extend rearward to the support ribs 144, creating a ventilation gap between them. This facilitates smoother air flow from the rear air inlet channel into the rear air inlet opening 12, reducing air flow resistance.

[0067] In another embodiment, Figure 4 and Figure 5 As shown, one of the side of the air inlet cover 13 facing the rear end surface 14 of the casing 1 and the supporting rib 144 is provided with a limiting groove 136, and the other is provided with a limiting rib 137, and the limiting rib 137 is inserted into the limiting groove 136 to cooperate with each other.

[0068] It can be understood that the limiting groove 136 and the limiting rib 137 are matched between the side of the air inlet cover 13 facing the rear end surface 14 of the casing 1 and the supporting rib 144, ensuring that the air inlet cover 13 can be accurately positioned during installation, and is fixed by inserting the limiting rib 137 into the limiting groove 136, avoiding looseness or misalignment caused by improper installation, and simplifying the installation process of the air inlet cover 13. The operator only needs to align the limiting rib 137 with the limiting groove 136 and insert it, without the need for complicated adjustment or fixing operations, and also facilitates subsequent maintenance and replacement work, reducing maintenance costs and time.

[0069] In another embodiment, while the support rib 144 is connected to the first connection rib 146 , a limiting rib 137 may be additionally provided to cooperate with the limiting groove 136 to make the cooperation tighter.

[0070] Further, such as Figure 2 As shown, the rear end surface 14 of the housing 1 is recessed forward from the edge to the center to form a cavity 145 for accommodating the air inlet cover 13 , and the annular rib 143 is located in the cavity 145 .

[0071] It is understood that the annular rib 143 provided on the concave cavity 145 further strengthens the connection strength between the air inlet cover 13 and the housing 1, preventing loosening or falling off due to vibration or external force during use, thereby improving the overall structural stability of the hair dryer. Through the design of the concave cavity 145 and the annular rib 143, the curvature of the rear air inlet channel is increased, lengthening the flow path and area of the air within the concave cavity 145, causing the air to be more reflected and attenuated during the flow process, thereby further reducing the propagation of noise. On the other hand, the concave cavity 145 can also serve as a sound insulation structure, reducing the transmission of noise from the rear end surface 14 of the housing 1 to the outside. While maintaining sufficient air intake, the noise generated by air flow is effectively reduced, thereby improving the noise reduction performance of the hair dryer. At the same time, the concave cavity 145 structure can accommodate the air inlet cover 13, preventing the air inlet cover 13 from scratching against other objects during use.

[0072] In addition to the above-mentioned preferred embodiments, the present invention has other implementation methods. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A hair dryer comprising a housing, a motor disposed within the housing, a fan blade, and side air inlets disposed on the outer peripheral side of the rear end of the housing, and a rear air inlet disposed on the rear end of the housing, wherein the motor drives the fan blade to allow air to flow into the housing through the side air inlet and the rear air inlet, and wherein: An air inlet cover is provided at the rear end of the casing, which covers the rear air inlet hole to reduce the air intake of the rear air inlet hole to balance the air intake of the side air inlet hole. A rear air inlet channel connected to the rear air inlet hole is formed between the air inlet cover and the rear end surface of the casing, and the rear air inlet channel is curved and extended.

2. The hair dryer according to claim 1, characterized in that The air inlet cover is provided with an annular groove on the side facing the rear end surface of the casing, and the rear end surface of the casing is provided with an annular rib, which is inserted into the annular groove and forms a curved rear air inlet channel between the outer wall of the annular rib and the inner wall of the annular groove, and the rear air inlet holes are distributed within the range surrounded by the annular rib.

3. The hair dryer according to claim 2, characterized in that An outer ring rib and an inner ring rib are provided on one side of the air inlet cover plate facing the rear end surface of the casing, and an annular groove is formed between the outer ring rib and the inner ring rib.

4. The hair dryer according to claim 3, characterized in that The rear end surface of the housing is provided with supporting ribs, which cooperate with the inner ring ribs.

5. The hair dryer according to claim 4, characterized in that The support rib is an annular structure, and the support rib is connected to the rear end face of the casing by a first connecting rib. The first connecting rib extends backward from the rear end face of the casing to the support rib, so that a ventilation gap is formed between the support rib and the rear end face of the casing; and / or, the side of the air inlet cover plate facing the rear end face of the casing and one of the support ribs is provided with a limiting groove, and the other side is provided with a limiting convex rib, and the limiting convex ribs are inserted into the limiting groove to cooperate with each other.

6. The hair dryer according to claim 2, characterized in that The rear end surface of the housing is concave forward from the edge to the center to form a concave cavity for accommodating the air inlet cover plate, and the annular convex rib is located in the concave cavity.

7. The hair dryer according to claim 1, wherein The rear end face of the casing is provided with a first positioning portion, and the side of the air inlet cover plate facing the rear end face of the casing is provided with a second positioning portion that cooperates with the first positioning portion, and the rear air inlet holes are distributed on the outer peripheral side of the first positioning portion.

8. The hair dryer according to claim 7, characterized in that The first positioning portion is connected to the housing through at least two second connecting ribs. The second connecting ribs are distributed around the outer circumference of the first positioning portion, and rear air inlet holes are formed between the circumferentially adjacent second connecting ribs.

9. The hair dryer according to claim 8, characterized in that A reinforcing rib is provided between the outer periphery of the second positioning portion and the air inlet cover plate, and an avoidance groove for avoiding the reinforcing rib is provided on the second connecting rib.

10. The hair dryer according to claim 7, characterized in that The casing includes a front shell and a rear end cover, the rear end cover is installed at the rear end of the front shell and is provided with side air inlet holes and rear air inlet holes, a mounting bracket for mounting the motor is provided in the casing, the rear end of the mounting bracket is provided with a first magnetic component, the rear end cover is provided with a second magnetic component attracted to the first magnetic component, the fastener passes through the first positioning portion and is connected to the second positioning portion to fix the air inlet cover to the rear end cover, and the fastener simultaneously fixes the second magnetic component to the rear end cover.

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