Hair drier

Abstract

The utility model discloses an air blower, which belongs to the field of household appliances, solves the problem of large noise transmitted outwards in the operation process of a fan unit, and adopts the technical scheme that the air blower mainly comprises a casing, a motor arranged in the casing, fan blades and an air inlet hole arranged at the rear end of the casing, the motor drives the fan blades to enable air to flow into the casing through the air inlet hole, and the fan blades are arranged in the casing. The machine shell is provided with an installation support, the installation support is located behind the motor, a filter screen support is arranged in the machine shell, a filter screen is arranged on the filter screen support, the filter screen support is arranged on the periphery of the installation support in a sleeving mode, a sound insulation cavity is defined between the front end of the filter screen support and the installation support, and the sound insulation cavity is distributed on the periphery of the fan blades in a surrounding mode. And an inner sound absorption layer is arranged between the peripheral side of the mounting bracket and the filter screen bracket, and is positioned behind the sound insulation cavity. The fan blade mainly reduces noise spread outwards in the operation process of the fan blade.

Description

Technical Field

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

[0002] A hair dryer is a small personal care appliance used to quickly dry hair. It can also be used to dry items that require quick drying. It consists of a fan unit and a heating element. Airflow enters the device through the fan unit, where it is heated by the heating element and then discharged, quickly drying hair. However, the fan unit generates air flow, and this airflow impinges on the fan unit or the body of the device, generating noise.

[0003] Prior art CN219719992U discloses a noise-reducing hair dryer, comprising a handle assembly, a handpiece connected to the handle assembly, a heating assembly and a fan unit disposed within the handpiece, an air inlet disposed at the rear end of the handpiece, and an air outlet disposed at the front end. Furthermore, a noise reduction chamber is disposed within the handpiece, the chamber being located between the fan unit and the heating assembly. Under the action of the fan unit, external airflow enters the handpiece from the air inlet, passes through the fan unit, the noise reduction chamber, and the heating assembly in sequence, and is then blown out from the air outlet. The noise reduction chamber converges toward the heating assembly after the fan unit diffuses outwards along the direction of the airflow. The provision of the noise reduction chamber prevents airflow from blowing directly toward the heating assembly, thereby reducing airflow turbulence and noise.

[0004] In the prior art, a noise reduction chamber is arranged between the fan unit and the heating assembly, so that the airflow brought in by the fan flows along the inner wall of the noise reduction chamber, thereby reducing the noise by reducing the turbulence of the airflow. However, due to the need for rapid drying, the fan unit of the existing hair dryer has a high speed, and the noise generated by the high-speed rotating fan unit during operation is also high. The noise reduction chamber reduces the noise of the airflow, but the noise generated by the fan unit itself is still high. Utility Model Content

[0005] The purpose of the utility model is to provide a hair dryer, which solves the problem of large noise transmitted outward during the operation of the fan unit and reduces the noise transmitted outward during the operation of the fan blades.

[0006] 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 and an air inlet arranged at the rear end of the casing, the motor drives the fan blade to make air flow into the casing through the air inlet, the casing is provided with a mounting bracket, the mounting bracket is located behind the motor, a filter bracket is provided in the casing, a filter is provided on the filter bracket, the filter bracket is sleeved on the outer periphery of the mounting bracket, a sound insulation cavity is formed between the front end of the filter bracket and the mounting bracket, the sound insulation cavity is distributed around the outer periphery of the fan blade, an inner sound absorption layer is provided between the outer peripheral side of the mounting bracket and the filter bracket, and the inner sound absorption layer is located behind the sound insulation cavity.

[0007] By adopting the above technical solution, the present invention has the following advantages: a mounting bracket and a filter bracket are provided on the housing, and a soundproof cavity is formed between the front end of the filter bracket and the mounting bracket. The formed soundproof cavity surrounds the outer periphery of the fan blades, so that the noise generated by the fan blades when driven by the motor is blocked by the soundproof cavity, weakening the noise energy, thereby reducing the decibel level of the noise after it is transmitted outward. In addition, an internal sound-absorbing layer is installed between the outer periphery of the mounting bracket and the filter bracket. The internal sound-absorbing layer absorbs the generated noise energy or absorbs the noise energy blocked in the soundproof cavity, further reducing the noise transmitted outward when the fan blades rotate at high speed.

[0008] Furthermore, the mounting bracket includes a front end plate connected to the casing and a rear ring body connected to the front end plate, the inner sound-absorbing layer is located between the outer peripheral side of the rear ring body and the filter bracket, and the sound insulation cavity is distributed around the outer periphery of the rear ring body.

[0009] Using the above-mentioned technical solution, the mounting bracket is set as a front end plate and a rear ring body, the inner sound-absorbing layer is set between the outer peripheral side of the rear ring body and the filter bracket, and the inner sound-absorbing layer is abutted against the rear end of the sound insulation cavity through the filter bracket to improve the stability of the inner sound-absorbing layer and prevent the inner sound-absorbing layer from moving away from the sound insulation cavity during the operation of the fan blade and affecting the noise reduction effect.

[0010] Furthermore, a rear surface of the front end plate is provided with a boss protruding backwards, a cavity is provided in the boss, and the front end of the filter bracket covers the cavity to form a sound insulation cavity.

[0011] By adopting the above technical solution, a cavity is provided in the boss and the front end of the filter bracket covers the cavity. The boss can be integrally formed with the front end plate through a mold, reducing the increase in production costs caused by setting the boss separately.

[0012] Furthermore, a plurality of bosses are dispersedly arranged in the circumferential direction of the front end plate, and a limiting gap is formed between two adjacent bosses. The front end of the filter bracket is provided with a limiting rib that cooperates with the limiting gap.

[0013] By adopting the above technical solution, the limiting ribs and the limiting gaps on the filter bracket are coordinated to improve the circumferential stability of the filter bracket after being connected to the mounting bracket, and effectively prevent the filter bracket from rotating relative to the mounting bracket.

[0014] Furthermore, the front end of the filter bracket is provided with a surrounding edge surrounding all the bosses, and the surrounding edge is recessed inwardly relative to the limiting gap to form a limiting rib.

[0015] By adopting the above-mentioned technical solution, the edge at the front end of the filter bracket surrounds all the bosses, increases the wall thickness of the sound insulation cavity, and improves the structural strength of the sound insulation cavity. The inwardly recessed limiting ribs cooperate with the limiting gaps. The edge not only improves the structural strength of the sound insulation cavity, but also improves the stability of the filter bracket after installation.

[0016] Furthermore, a connecting column is provided on the outer peripheral side of the rear ring body, the connecting column is located in the limiting gap, and the fastener passes through the filter bracket and is connected to the connecting column.

[0017] By adopting the above-mentioned technical solution, after the limiting rib is matched with the limiting gap, the fastener passes through the filter bracket and is connected to the connecting column, thereby connecting the filter bracket to the rear ring body, improving the stability of the filter bracket installation, and effectively preventing the limiting rib from detaching from the limiting gap and causing the filter bracket to detach from the rear ring body.

[0018] Furthermore, an annular groove for positioning the inner sound-absorbing layer is provided on the outer periphery of the rear ring body.

[0019] By adopting the above-mentioned technical solution, an annular groove is set on the outer periphery of the rear ring body, and then the inner sound-absorbing layer is set in the annular groove, so as to improve the stability of the installation of the inner sound-absorbing layer and reduce the possibility of the inner sound-absorbing layer being displaced or even detached relative to the rear ring body due to the vibration generated during the operation of the fan blade.

[0020] Furthermore, the filter bracket is provided with a plug-in hole, a non-return buckle is provided in the plug-in hole, and the front end of the filter is provided with a lug that is inserted into the plug-in hole and cooperates with the non-return buckle.

[0021] By adopting the above-mentioned technical solution, when the filter is set on the filter bracket, the lug on the filter is inserted into the plug hole so that the lug cooperates with the non-return buckle, thereby improving the stability of the filter installation and effectively preventing the filter from detaching from the filter bracket during the use of the hair dryer.

[0022] Furthermore, the air inlet includes a side air inlet arranged on the outer peripheral side of the rear end of the casing, the filter includes a filter side and a filter end, an external sound-absorbing layer is provided between the outer periphery of the filter side and the casing, the external sound-absorbing layer blocks the side air inlet, a positioning hole is provided at the end of the filter, and a positioning platform is provided at the rear end of the filter bracket to cooperate with the positioning hole.

[0023] By adopting the above-mentioned technical solution, after the motor drives the fan blades to start, air enters the casing from the air inlet holes at the rear end of the casing and the side air inlet holes on the outer peripheral side of the rear end of the casing. Air can enter the rear end of the casing and the outer peripheral side of the rear end of the casing, thereby improving the air intake efficiency of the hair dryer; the filter is positioned by the cooperation of the positioning holes at the end of the filter and the positioning platform on the filter bracket, thereby improving the stability of the filter and effectively preventing the filter from detaching from the filter bracket; an external sound-absorbing layer is provided between the outer periphery of the side of the filter and the casing, and the external sound-absorbing layer blocks the side air inlet holes, and absorbs the energy of the noise through the external sound-absorbing layer, thereby reducing the possibility of large noise generated when air enters the side air inlet holes; and the external sound-absorbing layer blocks the side air inlet holes, thereby effectively preventing foreign matter in the air from entering the interior of the casing from the side air inlet holes and affecting the normal use of the hair dryer.

[0024] Furthermore, the rear end of the casing is provided with an end cover, the air inlet includes a rear air inlet provided on the end cover, the positioning platform is provided with a first magnetic component, the end cover is provided with a second magnetic component, and the second magnetic component and the first magnetic component are attracted to fix the end cover.

[0025] By adopting the above-mentioned technical solution, during the operation of the fan blades, air is taken in by the side air inlet holes and the rear air inlet holes at the same time, thereby improving the air intake efficiency when the hair dryer is in use; when installing the end cover, the second magnetic suction part on the end cover is magnetically adsorbed on the first magnetic suction part on the positioning platform, and the end cover is installed by magnetic attraction, which not only stabilizes the installation of the end cover but also facilitates the disassembly and installation of the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Figure 1 This is an overall schematic diagram of a hair dryer according to the present invention;

[0028] Figure 2 This is an exploded schematic diagram of the mounting bracket and the filter bracket in the present invention;

[0029] Figure 3 This is a cross-sectional view of the mounting bracket and the filter bracket in the present utility model;

[0030] Figure 4 This is an exploded schematic diagram of the boss, filter bracket and filter in the utility model;

[0031] Figure 5 This is an exploded schematic diagram of the fastener and the connecting column in the present invention;

[0032] Figure 6 For this utility model Figure 3 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] like Figure 1 As shown, the utility model provides a hair dryer, including a housing 1, a motor 2, a fan blade 3 and an air inlet 4 provided at the rear end of the housing 1, an air outlet at the front end of the housing 1 and an end cover 11 at the rear end. Figure 1 and Figure 2 As shown, the air inlet 4 includes a side air inlet 41 provided on the outer peripheral side of the end cover 11 and a rear air inlet 42 provided on the rear side of the end cover 11. When the hair dryer is used, the motor 2 is started, and the motor 2 drives the fan blade 3 to rotate, so that the air outside the casing 1 enters the interior of the casing 1 from the side air inlet 41 and the rear air inlet 42, and is blown out from the air outlet at the front end of the casing 1 after forming an air flow inside the casing 1. The air flow blown out from the air outlet is aligned with the items to be dried or the position to be dried on the items, so that the air flow from the air outlet acts on the corresponding items or the position of the items to speed up the drying speed.

[0037] like Figure 2 and Figure 3As shown, an air inlet cover 111 is provided on the rear end face of the end cover 11. After the air inlet cover 111 is connected to the end cover 11, a bent air inlet channel 421 is formed. The incoming air is reflected at the bend of the air inlet channel 421 and gradually weakened, thereby reducing noise, and effectively reducing impurities such as hair from entering the interior of the casing 1 through the air inlet channel 421.

[0038] The fan blade 3 generates a lot of noise during operation due to its high speed. In order to reduce the possibility of excessive noise during the use of the hair dryer, Figure 2 、 Figure 3 and Figure 4 As shown, the casing 1 is provided with a mounting bracket 5, and the mounting bracket 5 is located behind the motor 2. The mounting bracket 5 includes a front end plate 51 connected to the casing 1 and a rear ring body 52 connected to the front end plate 51. A rear side surface of the front end plate 51 is provided with a rearwardly protruding boss 511, and the boss 511 can be integrally formed with the front end plate 51 through a mold, reducing the increase in production costs caused by setting the boss 511 separately. A concave cavity is provided in the boss 511. At the same time, a filter bracket 6 is also provided in the casing 1. The front end of the filter bracket 6 is sleeved on the rear ring body 52 and covers the concave cavity, so that a sound insulation cavity 512 is formed between the concave cavity and the front end of the filter bracket 6. The sound insulation cavity 512 formed is distributed around the outer periphery of the fan blade 3 and around the outer periphery of the rear ring body 52, so that the noise generated during the operation of the fan blade 3 is blocked by the sound insulation cavity 512, weakening the energy of the noise, thereby reducing the decibel number of the noise after being transmitted outward.

[0039] In order to further reduce the noise transmitted by the hair dryer, Figure 4 As shown, an inner sound-absorbing layer 53 is provided between the outer peripheral side of the mounting bracket 5 and the filter bracket 6. The material of the inner sound-absorbing layer 53 can be made of polyester fiber, glass fiber, rock wool, foam plastic, polyurethane foam or wool felt, so that the material of the inner sound-absorbing layer 53 is relatively soft, which facilitates the inner sound-absorbing layer 53 to be arranged around the outer peripheral side of the mounting bracket 5 so that the inner sound-absorbing layer 53 absorbs sound circumferentially, thereby improving the sound absorption effect. The inner sound-absorbing layer 53 is located between the outer peripheral side of the rear ring body 52 and the filter bracket 6, and the inner sound-absorbing layer 53 is also located behind the sound insulation cavity 512. The inner sound-absorbing layer 53 absorbs the noise energy in the sound insulation cavity 512 and also absorbs the noise energy at the rear ring body 52. On the basis of the noise reduction of the sound insulation cavity 512, the inner sound-absorbing layer 53 further reduces the noise, thereby improving the noise reduction effect.

[0040] When installing the inner sound absorbing layer 53, Figure 3 and Figure 4 As shown, an annular groove 523 is provided on the outer periphery of the rear ring body 52, and the inner sound absorbing layer 53 is provided in the annular groove 523, which facilitates the installation and positioning of the inner sound absorbing layer 53, and reduces the possibility of the inner sound absorbing layer 53 shifting or even detaching relative to the rear ring body 52 when the hair dryer is used and vibrates.

[0041] Specifically, such as Figure 4 As shown, multiple bosses 511 are dispersedly arranged in the circumferential direction of the front end plate 51, and a limiting gap 513 is formed between two adjacent bosses 511. The front end of the filter bracket 6 is provided with a limiting rib 621 that cooperates with the limiting gap 513. The front end of the filter bracket 6 is provided with a surrounding edge 62 that surrounds all the bosses 511. The limiting rib 621 is on the surrounding edge 62 and is formed by the inward depression of the surrounding edge 62. When the filter bracket 6 is sleeved on the rear ring body 52, the surrounding edge 62 surrounds multiple bosses 511, and the limiting rib 621 is inserted into the limiting gap 513, so that the front end plate 51 and the rear ring body 52 limit the filter bracket 6 in the circumferential direction, effectively preventing the filter bracket 6 from rotating relative to the rear ring body 52.

[0042] In order to further improve the stability of the filter support 6, as Figure 4 and Figure 5 As shown, a connecting column 521 is provided on the outer peripheral side of the rear ring body 52, and the connecting column 521 extends along the radial direction of the rear ring body 52 to the limiting gap 513. A fastening hole 522 is provided on the connecting column 521, and a connecting hole 622 is provided on the filter bracket 6. The connecting hole 622 is located on the limiting rib 621, and the connecting hole 622 passes through the limiting rib 621 along the radial direction of the filter bracket 6. Figure 5 As shown, the filter holder 6 is provided with a fastener 7. Specifically, the fastener 7 can be a screw, which passes through the connecting hole 622 and is threadedly connected to the fastening hole 522, thereby fixing the filter holder 6 to the rear ring body 52. The connecting hole 622 is a stepped hole. After passing through the connecting hole 622, the screw abuts against the stepped surface of the stepped hole, so that the screw does not protrude from the outer peripheral side of the limiting rib 621.

[0043] like Figure 4 and Figure 6 As shown, a filter screen 61 is provided on the filter support 6. When the filter screen 61 is installed, a plug hole 613 is provided on the filter support 6. A check buckle 614 is provided in the plug hole 613. The check buckle 614 extends radially along the filter support 6. A lug 611 is provided at the front end of the filter screen 61. The lug 611 is provided with a through hole 612 that penetrates the lug 611 along the radial direction of the filter support 6. When the filter screen 61 is installed on the filter support 6, the filter screen 61 is slid along the axial direction of the filter support 6 so that the lug 611 on the filter screen 61 slides into the plug hole 61. 3, when the lug 611 abuts against the non-return buckle 614, the lug 611 elastically deforms to continue to be inserted into the insertion hole 613. When the non-return buckle 614 and the through hole 612 on the lug 611 are aligned in the radial direction of the filter holder 6, the lug 611 recovers so that the non-return buckle 614 extends into the through hole 612 to form a clamping connection with the lug 611 in the axial direction of the filter holder 6, thereby installing the filter 61 on the filter holder 6. The plugging of the non-return buckle 614 and the through hole 612 effectively prevents the filter 61 from being separated from the filter holder 6.

[0044] In this embodiment, if Figure 3 、 Figure 4 and Figure 6 As shown, the filter 61 includes a side portion 615 and an end portion 616. The end portion 615 supports the side portion 616. An external sound-absorbing layer 8 is provided between the outer periphery of the side portion 615 and the housing 1. The external sound-absorbing layer 8 absorbs the noise energy generated by air entering the housing 1 through the side air inlet 41, further preventing the noise generated by air entering the housing 1 through the side air inlet 41 from being transmitted outward. Furthermore, the external sound-absorbing layer 8, blocking the side air inlet 41, also prevents foreign matter from entering the housing 1, thereby preventing it from affecting the normal operation of the hair dryer.

[0045] In order to improve the stability of the installation of the filter 61, Figure 3 and Figure 4 As shown, a positioning hole 617 is provided at the end 616 of the filter, and a positioning platform 63 is set at the rear end of the filter bracket 6. Through the cooperation between the positioning platform 63 and the positioning hole 617, the filter 61 is sleeved on the filter bracket 6, thereby improving the stability of the installation of the filter 61 and avoiding the possibility of the filter 61 shifting or even detaching relative to the filter bracket 6 during the use of the hair dryer.

[0046] In order to improve the stability of the end cover 11, as Figure 3 As shown, a first magnetic component 13 is provided on the positioning platform 63, and a second magnetic component 12 is provided on the end cover 11. At least one of the first magnetic component 13 and the second magnetic component 12 has magnetic adsorption capability, and the other can be magnetically adsorbed. When the end cover 11 is installed, the first magnetic component 13 and the second magnetic component 12 are attracted to each other, thereby adsorbing and fixing the end cover 11. When the end cover 11 needs to be removed, the end cover 11 can be moved with greater force to separate the first magnetic component 13 and the second magnetic component 12 to remove the end cover 11.

[0047] 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 in the housing, a fan blade, and an air inlet disposed at the rear end of the housing. The motor drives the fan blade to allow air to flow into the housing through the air inlet. The housing is provided with a mounting bracket, which is located behind the motor. The invention is characterized in that: A filter bracket is provided in the casing, a filter is provided on the filter bracket, the filter bracket is sleeved on the outer periphery of the mounting bracket, a sound insulation cavity is formed between the front end of the filter bracket and the mounting bracket, the sound insulation cavity is distributed around the outer periphery of the fan blade, an inner sound absorption layer is provided between the outer peripheral side of the mounting bracket and the filter bracket, and the inner sound absorption layer is located behind the sound insulation cavity.

2. The hair dryer according to claim 1, characterized in that The mounting bracket includes a front end plate connected to the casing and a rear ring body connected to the front end plate. The inner sound absorbing layer is located between the outer peripheral side of the rear ring body and the filter bracket, and the sound insulation cavity is distributed around the outer periphery of the rear ring body.

3. The hair dryer according to claim 2, characterized in that The rear side surface of the front end plate is provided with a boss protruding backwards, a cavity is provided in the boss, and the front end of the filter bracket covers the cavity to form a sound insulation cavity.

4. The hair dryer according to claim 3, characterized in that The bosses are dispersedly arranged in a plurality in the circumferential direction of the front end plate, and a limiting gap is formed between two adjacent bosses. The front end of the filter bracket is provided with a limiting rib that cooperates with the limiting gap.

5. The hair dryer according to claim 4, characterized in that The front end of the filter bracket is provided with a surrounding edge surrounding all the bosses, and the surrounding edge is recessed inwardly relative to the limiting gap to form a limiting rib.

6. The hair dryer according to claim 4, characterized in that A connecting column is provided on the outer peripheral side of the rear ring body. The connecting column is located in the limiting gap, and the fastener passes through the filter bracket and is connected to the connecting column.

7. The hair dryer according to claim 2, characterized in that The outer periphery of the rear ring body is provided with an annular groove for positioning the inner sound absorbing layer.

8. The hair dryer according to claim 1, wherein The filter screen bracket is provided with a plug-in hole, a non-return buckle is provided in the plug-in hole, and a lug is provided at the front end of the filter screen for inserting into the plug-in hole and cooperating with the non-return buckle.

9. The hair dryer according to claim 1, wherein The air inlet includes a side air inlet arranged on the outer peripheral side of the rear end of the casing, the filter includes a filter side and a filter end, an external sound-absorbing layer is provided between the outer periphery of the filter side and the casing, the external sound-absorbing layer blocks the side air inlet, a positioning hole is provided at the filter end, and a positioning platform is provided at the rear end of the filter bracket to cooperate with the positioning hole.

10. The hair dryer according to claim 9, characterized in that The rear end of the housing is provided with an end cover, the air inlet includes a rear air inlet provided on the end cover, the positioning platform is provided with a first magnetic component, the end cover is provided with a second magnetic component, and the second magnetic component and the first magnetic component are attracted to fix the end cover.

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