Diffusion tuyere and electric hair drier

Abstract

The utility model relates to a diffusion tuyere and an electric hair drier, and belongs to the technical field of electric hair driers. A diffusion tuyere comprises a first shell, a second shell, a first air inlet, a second air inlet, a second air inlet, a third air inlet and a fourth air inlet, and the first shell is provided with a first mounting cavity and a first opening and a second opening; the third shell is arranged on the first shell, and a first air outlet is formed in the third shell; and the second shell is clamped between the first shell and the third shell, and a third opening and a fourth opening are formed in the second shell. The first shell, the second shell and the third shell are assembled to guide air, so that the diffusion tuyere is more integral and firmer in structure. Air flow output by the electric hair dryer enters the air passing cavity after passing through the third opening, is guided in the air passing cavity and then is output by the air passing cavity through the first air outlet, the diffusion air nozzle plays a certain role in guiding and diffusing the air flow in the air cavity, and the local temperature of the air flow is prevented from being too high.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryers, in particular to a diffusion nozzle and a hair dryer. Background Art

[0002] Hair dryers are mainly used for drying and shaping hair, but can also be used for local drying, heating and physical therapy in laboratories, physical therapy rooms, industrial production, art and other aspects. The use of a hair dryer with a diffuser nozzle can meet people's specific needs and better play the role of a hair dryer. However, the existing diffuser nozzles are noisy and noisy when in use, and due to the high local temperature, they can easily cause burns to the skin. Moreover, the existing diffuser nozzles are generally composed of an air outlet panel and a base expansion component that are engaged with each other, which can easily cause the air outlet panel to fall off, making it unsuitable for long-term use. Utility Model Content

[0003] Based on this, it is necessary to provide a diffusion nozzle and a hair dryer to address the problems of uneven air outlet temperature of the nozzle and easy detachment of the nozzle.

[0004] A diffusion nozzle comprises: a first shell, the first shell is provided with a first installation cavity, the first shell is provided with a first opening and a second opening, the first opening and the second opening are respectively connected to the first installation cavity; a third shell, the third shell is arranged on the first shell, an end cover of the third shell is arranged at the second opening, the third shell is provided with a first air outlet, and an accommodating cavity is formed between the third shell and the first shell; a second shell, the second shell is clamped between the first shell and the third shell, part of the second shell is located in the accommodating cavity and partly extends out of the first opening, the second shell is provided with a third opening and a fourth opening, the third opening and the fourth opening are connected to the first air outlet in sequence.

[0005] The present application discloses a diffuser nozzle that can be used in a hair dryer. Air is guided through the combination of a first shell, a second shell, and a third shell. After assembly, an air passage cavity is formed between the first shell, the second shell, and the third shell. A portion of one side of the second shell, which has a third opening, extends through the first opening and out of the first shell. Therefore, the third opening, the air passage cavity, and the first air outlet are sequentially connected to guide and output the air blown out of the hair dryer, making the blown air more convenient to use. Assembling the first shell, the second shell, and the third shell gives the diffuser nozzle a more integrated and robust structure. When the hair dryer is in use, the airflow output by the hair dryer passes through the third opening and enters the air passage cavity. After being guided within the air passage cavity, it is then output from the air passage cavity through the first air outlet. The third shell guides and diffuses the airflow in the air passage cavity, thereby achieving the purpose of dispersing the airflow. The air passage cavity also balances the airflow temperature, preventing localized excessive temperatures in the airflow, thereby improving the user experience.

[0006] In one embodiment, an air passage cavity is formed between the second shell and the third shell, the second shell is provided with a second mounting cavity, the third opening and the fourth opening are respectively connected to the second mounting cavity, a side portion of the second shell having the third opening passes through the first opening and extends to the outside of the first shell, a side portion of the second shell having the fourth opening abuts against the third shell, and the third opening, the air passage cavity and the first air outlet are connected in sequence. The third opening and the fourth opening are respectively connected to the second mounting cavity of the second shell, and a side portion of the second shell having the third opening passes through the first opening and extends to the outside of the first shell, so the third opening, the air passage cavity and the first air outlet are connected in sequence, so that when the diffuser nozzle is connected to the hair dryer for use, air enters from the third opening, passes through the air passage cavity and is output from the first air outlet. By connecting the diffuser nozzle to the hair dryer for use, the diffuser nozzle can guide and diffuse the airflow, and also balance the airflow temperature to prevent the local temperature of the airflow from being too high.

[0007] In one embodiment, the first air outlet includes multiple air holes and multiple air outlet channels, which are connected to the air passage. The multiple air holes can more evenly distribute the airflow, and the multiple air outlet channels can be inserted into the hair when using the hair dryer, so that the air blown by the hair dryer can be blown into the hair through the air outlet channels, achieving faster drying.

[0008] In one of the embodiments, a plurality of first limiting protrusions and second limiting protrusions are formed on the first shell, a limiting through hole is provided on the second shell, and a plurality of first limiting grooves and second limiting grooves are formed on the third shell; the first limiting protrusions are located on the inner wall of the first shell, the second limiting protrusions are located on one side of the second opening, the second limiting grooves are located on the outer wall of the third shell, the first limiting protrusions pass through the limiting through hole and are adaptively connected with the first limiting grooves, and the second limiting protrusions are clamped with the second limiting grooves. Through the adaptive clamping of the second limiting protrusions and the second limiting grooves, the first shell and the third shell are adaptively connected, the second shell is clamped between the first shell and the third shell, the first limiting protrusions pass through the limiting through hole on the second shell and are adaptively connected with the first limiting grooves, and the diffusion nozzle structure composed of the first shell, the second shell and the third shell is more stable, a heat insulation cavity is formed on the diffusion nozzle, the diffusion nozzle is prevented from being overheated and scalding, and inconvenience in use is avoided.

[0009] In one of the embodiments, the third shell comprises an air outlet panel and a plurality of outer protruding columnar comb teeth; the air outlet panel is arranged on the first shell, the connection between the air outlet panel and the first shell is arc-shaped, the plurality of outer protruding columnar comb teeth are arranged on the air outlet panel, the outer protruding columnar comb teeth are provided with the air outlet channels, and the air outlet panel is provided with a plurality of air outlet holes. The outer protruding columnar comb teeth limit the shortest distance between the nozzle and the scalp, so that the best blowing effect is achieved. Meanwhile, the air outlet channels on the outer protruding columnar comb teeth can directly input the air output by the hair dryer into the hair, so that the hair is loosened and the speed of drying the hair is accelerated.

[0010] In one of the embodiments, the plurality of outer protruding columnar comb teeth are annularly and spacedly distributed. The annular and spaced distribution of the plurality of outer protruding columnar comb teeth can make the air delivery more uniform, and can expand the area and accelerate the speed.

[0011] In one of the embodiments, the plurality of outer protruding columnar comb teeth form two annular bands with different radii. The annular arrangement of the outer protruding columnar comb teeth facilitates the arrangement of the hair, the hair is wound on the annular bands formed by the outer protruding columnar comb teeth, and after being dried and shaped by the hot air, the hair can be made into a curly hairstyle.

[0012] In one of the embodiments, the third shell further comprises a third limiting protrusion, the third limiting protrusion is arranged on the air outlet panel, and the third limiting protrusion is provided with a first limiting groove. Through the arrangement of the third limiting protrusion on the air outlet panel, the third limiting protrusion is provided with the first limiting groove, the first limiting protrusion passes through the limiting through hole and is adaptively connected with the first limiting groove, and the diffusion nozzle structure composed of the first shell, the second shell and the third shell is more stable.

[0013] In one embodiment, the third housing is provided with a connecting annular groove, and the outer wall of the second housing on the side of the fourth opening is provided with an annular outward-turned structure, which abuts against the groove wall of the connecting annular groove. The provision of the connecting annular groove allows for direct adaptation to the annular outward-turned structure during assembly. The connection between the third housing and the second housing is achieved through the coordinated provision of the connecting annular groove and the annular outward-turned structure. The combination of the two provides a more stable structure and also achieves improved airtightness.

[0014] In one embodiment, the second shell and the first shell enclose a heat-insulating cavity, which surrounds the air passage cavity. The heat-insulating cavity can prevent the diffuser nozzle from overheating and causing user inconvenience or safety hazards.

[0015] In one embodiment, a portion of the second housing is located within the first mounting cavity, and a portion of the second housing extends outside the first housing through the first opening. An annular groove is provided on the outer wall of the portion of the second housing extending outside the first housing, and the third opening is provided on the side of the second housing extending outside the first housing. The annular groove engages with the air outlet of the hair dryer, facilitating connection and preventing the diffuser nozzle from falling off during use. The diffuser nozzle and hair dryer can also be quickly assembled and disassembled, making use more convenient and quicker.

[0016] A hair dryer comprises: the above-mentioned diffusion nozzle; a shell assembly, the shell assembly is provided with a mounting cavity, the shell assembly is provided with a second air inlet and a second air outlet, the mounting cavity is connected to the second air inlet and the second air outlet respectively, the diffusion nozzle is clamped on the shell assembly, the diffusion nozzle is arranged at the second air outlet, and the second air outlet is connected to the first air inlet; a fan assembly, the fan assembly is arranged on the shell assembly, the fan assembly is located in the mounting cavity; a heating device, the heating device is arranged on the shell assembly, the heating device is located in the mounting cavity, and the heating device is used to heat the airflow flowing through the mounting cavity; a handle assembly, the handle assembly is arranged on the shell assembly; a control device, the control device is electrically connected to the heating device and the fan assembly.

[0017] The present application discloses an electric hair dryer, in which the above-mentioned air diffusion nozzle is on a shell assembly, and a heating device is provided on the shell assembly, so that the airflow entering the outside is guided into the installation cavity through the fan assembly, and a control device and the heating device are electrically connected. The heating device is started to work by the control device, and the airflow flowing through the installation cavity is heated by the heating device, or cold air is directly output. Automation can be better achieved through the control device.

[0018] Further, the key is arranged on the shell assembly, and the key is connected with the control device, and the key is used for controlling the control device.

[0019] Further, the key comprises a temperature control key and / or a power switch, and the key can be touch type or key type. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a first perspective view of the diffusion air nozzle;

[0021] Figure 2 It is a second perspective view of the diffusion air nozzle;

[0022] Figure 3 It is a first sectional view of the diffusion air nozzle;

[0023] Figure 4 It is a second sectional view of the diffusion air nozzle;

[0024] Figure 5 It is a first exploded view of the diffusion air nozzle;

[0025] Figure 6 It is a second exploded view of the diffusion air nozzle;

[0026] Figure 7 It is a perspective view of the hair dryer.

[0027] In the drawings, the correspondence between the reference signs and the component names is as follows:

[0028] 1 first shell, 101 first opening, 102 second opening, 1011 first limiting protrusion, 1021 second limiting protrusion;

[0029] 2 second shell, 201 third opening, 202 fourth opening, 203 limiting through hole, 2011 annular groove, 2021 annular outward turning structure;

[0030] 3 third shell, 31 air panel, 32 outer protruding columnar comb tooth, 33 third limiting protrusion, 301 first air outlet, 302 connecting ring groove, 3011 air outlet hole, 3012 air outlet channel, 3021 first limiting groove, 3022 second limiting groove;

[0031] 100 diffusion air nozzle;

[0032] 200 shell assembly;

[0033] 300 handle assembly. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0036] The following describes the diffusion nozzle and the hair dryer according to some embodiments of the present invention with reference to the accompanying drawings.

[0037] Example 1

[0038] like Figures 1 to 6 As shown, this embodiment discloses a diffusion nozzle, including: a first shell 1, the first shell 1 is provided with a first installation cavity, the first shell 1 is provided with a first opening 101 and a second opening 102, the first opening 101 and the second opening 102 are respectively connected to the first installation cavity; a third shell 3, the third shell 3 is arranged on the first shell 1, one end cover of the third shell 3 is arranged at the second opening 102, the third shell 3 is provided with a first air outlet 301, and an accommodating cavity is formed between the third shell 3 and the first shell 1; a second shell 2, the second shell 2 is clamped between the first shell 1 and the third shell 3, part of the second shell 2 is located in the accommodating cavity and part of it extends out of the first opening 101, the second shell 2 is provided with a third opening 201 and a fourth opening 202, the third opening 201 and the fourth opening 202 are connected to the first air outlet 301 in sequence.

[0039] The present application discloses a diffuser nozzle that can be used in a hair dryer. Air is guided by the combination of a first housing 1, a second housing 2, and a third housing 3. After assembly, an air passage cavity is formed between the first housing 1, the second housing 2, and the third housing 3. A portion of a side of the second housing 2 having a third opening 201 extends through the first opening 101 and out of the first housing 1. Therefore, the third opening 201, the air passage cavity, and the first air outlet 301 are sequentially connected to guide and output the air blown out of the hair dryer, making the blown air more convenient to use. Assembling the first housing 1, the second housing 2, and the third housing 3 makes the diffuser nozzle more integrated and structurally stronger. When the hair dryer is in use, the airflow output by the hair dryer passes through the third opening 201 and enters the air passage cavity. After being guided within the air passage cavity, the airflow is then output from the air passage cavity through the first air outlet 301. The third housing 3 plays a certain role in guiding and diffusing the airflow in the air chamber, thereby achieving the purpose of dispersing the airflow. The air cavity also balances the air flow temperature, preventing the local temperature of the air flow from being too high, and better improving the user experience.

[0040] like Figure 3 and Figure 4 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines: an air cavity is formed between the second shell 2 and the third shell 3, the second shell 2 is provided with a second installation cavity, the third opening 201 and the fourth opening 202 are respectively connected to the second installation cavity, the side of the second shell 2 with the third opening 201 partially passes through the first opening 101 and extends to the outside of the first shell 1, the side of the second shell 2 with the fourth opening 202 is against the third shell 3, and the third opening 201, the air cavity and the first air outlet 301 are connected in sequence. The third opening 201 and the fourth opening 202 are respectively connected to the second installation cavity of the second shell 1. The second shell 2 has a side portion of the third opening 201 that passes through the first opening 101 and extends to the outside of the first shell 1. Therefore, the third opening 201, the air cavity and the first air outlet 301 are connected in sequence, so that when the diffuser nozzle is connected to the hair dryer for use, the wind enters from the third opening 201, passes through the air cavity and is output from the first air outlet 301. By connecting the diffuser nozzle to the hair dryer for use, the diffuser nozzle can play a role in guiding and diffusing the airflow, and also play a role in balancing the airflow temperature to prevent the local temperature of the airflow from being too high.

[0041] like Figure 1 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the first air outlet 301 includes multiple air outlet holes 3011 and multiple air outlet channels 3012, and the multiple air outlet holes 3011 and multiple air outlet channels 3012 are connected to the air passage cavity. The multiple air outlet holes 3011 can more evenly distribute the air flow, and the multiple air outlet channels 3012 can be inserted into the hair when using the hair dryer, so that the air blown by the hair dryer can be blown into the hair through the air outlet channels 3012, achieving the purpose of drying more quickly.

[0042] like Figure 5 and Figure 6As shown, in addition to the features of the above-mentioned embodiment, this embodiment is further defined as follows: a plurality of first limiting protrusions 1011 and second limiting protrusions 1021 are formed on the first shell 1, a limiting through-hole 203 is provided on the second shell 2, and a plurality of first limiting grooves 3021 and second limiting grooves 3022 are formed on the third shell 3; the first limiting protrusion 1011 is located on the inner wall of the first shell 1, the second limiting protrusion 1021 is located on one side of the second opening 102, and the second limiting groove 3022 is located on the outer wall of the third shell 3, the first limiting protrusion 1011 passes through the limiting through-hole 203 and is adaptively connected to the first limiting groove 3021, and the second limiting protrusion 1021 is clamped with the second limiting groove 3022. The first shell 1 and the third shell 3 are adaptively connected by the second limiting protrusion 1021 and the second limiting groove 3022. The second shell 2 is clamped between the first shell 1 and the third shell 3. The first limiting protrusion 1011 passes through the limiting through hole 203 on the second shell 2 and is adaptively connected with the first limiting groove 3021, so that the diffusion nozzle structure composed of the first shell 1, the second shell 2 and the third shell 3 is more stable, and an insulating cavity is formed on the diffusion nozzle to prevent the nozzle from overheating and causing inconvenience in use.

[0043] like Figure 1 and Figure 4 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the third housing 3 includes an air outlet panel 31 and protruding columnar comb teeth 32. The air outlet panel 31 is disposed on the first housing 1, and the connection between the air outlet panel 31 and the first housing 1 is arc-shaped. There are multiple protruding columnar comb teeth 32, and multiple protruding columnar comb teeth 32 are disposed on the air outlet panel 31. The protruding columnar comb teeth 32 are provided with air outlet channels 3012, and the air outlet panel 31 is provided with multiple air outlet holes 3011. The protruding columnar comb teeth 32 limit the minimum distance between the air nozzle and the scalp, thereby achieving an optimal blowing effect. At the same time, the air outlet channels 3012 on the protruding columnar comb teeth 32 can directly input the air output from the hair dryer into the hair, loosening the hair and accelerating the drying process.

[0044] like Figure 1 and Figure 4 As shown, in addition to the features of the above embodiment, this embodiment further defines that: a plurality of outer protruding columnar comb teeth 32 are distributed in a ring shape at intervals. By distributing the plurality of protruding columnar comb teeth 32 in a ring shape at intervals, the wind can be transported more evenly, and the area can be expanded and the speed can be increased.

[0045] like Figure 2 and Figure 4In addition to the features of the above-mentioned embodiment, this embodiment further provides that: a plurality of outwardly protruding cylindrical comb teeth 32 form two annular bands of different radii. The annular arrangement of the outwardly protruding cylindrical comb teeth 32 facilitates hair management. Hair is coiled around the annular band formed by the outwardly protruding cylindrical comb teeth 32 and, after being dried and shaped with hot air, can be created into curly styles.

[0046] like Figure 4 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the third housing 3 also includes a third limiting protrusion 33, which is provided on the air outlet panel 31 and has a first limiting groove 3021. By providing the third limiting protrusion 33 on the air outlet panel 31 and having the first limiting groove 3021 on the third limiting protrusion 33, and by the first limiting protrusion 1011 passing through the limiting through-hole 203 and being adapted to connect with the first limiting groove 3021, the diffuser nozzle structure composed of the first housing 1, the second housing 2, and the third housing 3 is made more stable.

[0047] like Figure 4 and Figure 6 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines: the third housing 3 is provided with a connecting annular groove 302, and the outer wall of the second housing 2 on the side of the fourth opening 202 is provided with an annular outward-turned structure 2021, which abuts against the groove wall of the connecting annular groove 302. The provision of the connecting annular groove 302 allows for direct adaptation to the annular outward-turned structure 2021 during assembly. The connection between the third housing 3 and the second housing 2 is achieved through the coordinated provision of the connecting annular groove 302 and the annular outward-turned structure 2021. The combination of the two makes the structure more stable, and the coordination of the connecting annular groove 302 and the annular outward-turned structure 2021 also achieves better airtightness.

[0048] like Figure 3 As shown, in addition to the features of the above embodiment, this embodiment further defines: the second housing 2 and the first housing 1 enclose a heat-insulating cavity, which is disposed around the air passage cavity. The provision of the heat-insulating cavity prevents the diffuser nozzle from overheating and scalding, thereby avoiding user inconvenience or safety hazards.

[0049] like Figure 3As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: a portion of the second shell 2 is located within the first mounting cavity, a portion of the second shell 2 extends outside the first shell 1 after passing through the first opening 101, an annular groove 2011 is provided on the outer wall of the portion of the second shell 2 extending outside the first shell 1, and a third opening 201 is provided on the side of the second shell 2 extending outside the first shell 1. The annular groove 2012 is locked with the air outlet of the hair dryer, making the connection more convenient, preventing the diffuser nozzle from falling off when connected to the hair dryer for use, and allowing for quick assembly and disassembly of the diffuser nozzle and hair dryer, making use more convenient and quicker.

[0050] Example 2

[0051] like Figure 7 As shown, this embodiment discloses a hair dryer, comprising: the above-mentioned diffuser nozzle 100; a shell assembly 200, the shell assembly 200 is provided with an installation cavity, the shell assembly 200 is provided with a second air inlet and a second air outlet, the installation cavity is connected to the second air inlet and the second air outlet respectively, the diffuser nozzle card 100 is connected to the shell assembly 200, the diffuser nozzle 100 is arranged at the second air outlet, and the second air outlet is connected to the first air inlet; a fan assembly, the fan assembly is arranged on the shell assembly 200, and the fan assembly is located in the installation cavity; a heating device, the heating device is arranged on the shell assembly 200, and the heating device is located in the installation cavity, and the heating device is used to heat the airflow flowing through the installation cavity; a handle assembly 300, the handle assembly 300 is arranged on the shell assembly 200; a control device, the control device is electrically connected to the heating device and the fan assembly.

[0052] The present application discloses a hair dryer, in which the above-mentioned diffuser nozzle 100 is on a shell assembly 200, and a heating device is provided on the shell assembly 200, so that the airflow entering the outside is guided into the installation cavity through the fan assembly, and a control device and a heating device are electrically connected. The heating device is started to work by the control device, and the airflow flowing through the installation cavity is heated by the heating device, or cold air is directly output. Automation can be better achieved through the control device.

[0053] Furthermore, it also includes a button, which is arranged on the housing assembly 200, connected to the control device, and used to control the control device.

[0054] Furthermore, the buttons include temperature control buttons and / or power switches, and the buttons can be touch-type or push-button-type.

[0055] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A diffuser nozzle, characterized in that: include: A first shell (1), wherein the first shell (1) is provided with a first installation cavity, the first shell (1) is provided with a first opening (101) and a second opening (102), the first opening (101) and the second opening (102) are respectively communicated with the first installation cavity; a third shell (3), the third shell (3) being arranged on the first shell (1), an end cover of the third shell (3) being arranged at the second opening (102), a first air outlet (301) being provided on the third shell (3), and a receiving cavity being formed between the third shell (3) and the first shell (1); A second shell (2), wherein the second shell (2) is sandwiched between the first shell (1) and the third shell (3), a portion of the second shell (2) is located in the accommodating cavity and a portion extends out of the first opening (101), and a third opening (201) and a fourth opening (202) are provided on the second shell (2), and the third opening (201) and the fourth opening (202) are sequentially connected to the first air outlet (301).

2. The diffuser nozzle according to claim 1, characterized in that: An air passage cavity is formed between the second shell (2) and the third shell (3), the second shell (2) is provided with a second installation cavity, the third opening (201) and the fourth opening (202) are respectively connected to the second installation cavity, a side portion of the second shell (2) having the third opening (201) passes through the first opening (101) and extends to the outside of the first shell (1), and a side of the second shell (2) having the fourth opening (202) abuts against the third shell (3), and the third opening (201), the air passage cavity and the first air outlet (301) are connected in sequence.

3. The diffuser nozzle according to claim 2, characterized in that: The first air outlet (301) comprises a plurality of air outlet holes (3011) and a plurality of air outlet channels (3012), and the plurality of air outlet holes (3011) and the plurality of air outlet channels (3012) are in communication with the air passage cavity.

4. The diffuser nozzle according to claim 1, characterized in that: A plurality of first limiting protrusions (1011) and second limiting protrusions (1021) are formed on the first shell (1), a limiting through hole (203) is provided on the second shell (2), and a plurality of first limiting grooves (3021) and second limiting grooves (3022) are formed on the third shell (3); the first limiting protrusion (1011) is located on the inner wall of the first shell (1), the second limiting protrusion (1021) is located on one side of the second opening (102), and the second limiting groove (3022) is located on the outer wall of the third shell (3); the first limiting protrusion (1011) passes through the limiting through hole (203) and is adaptively connected to the first limiting groove (3021), and the second limiting protrusion (1021) is clamped to the second limiting groove (3022).

5. The diffuser nozzle according to claim 1, characterized in that: The third shell (3) comprises an air outlet panel (31) and externally protruding columnar comb teeth (32); the air outlet panel (31) is arranged on the first shell (1); the connection between the air outlet panel (31) and the first shell (1) is arc-shaped; the number of the externally protruding columnar comb teeth (32) is multiple; the multiple externally protruding columnar comb teeth (32) are arranged on the air outlet panel (31); the externally protruding columnar comb teeth (32) are provided with air outlet channels (3012); and the air outlet panel (31) is provided with multiple air outlet holes (3011).

6. The diffuser nozzle according to claim 5, characterized in that: The plurality of protruding columnar comb teeth (32) are distributed in an annular pattern at intervals; And / or a plurality of the outwardly protruding columnar comb teeth (32) form two annular belts with different radii.

7. The diffuser nozzle according to claim 5, characterized in that: The third shell (3) further comprises a third limiting protrusion (33), the third limiting protrusion (33) being arranged on the air outlet panel (31), and a first limiting groove (3021) being provided on the third limiting protrusion (33).

8. The diffuser nozzle according to claim 1, characterized in that: The third shell (3) is provided with a connecting annular groove (302), and the outer wall of the second shell (2) on one side of the fourth opening (202) is provided with an annular outward-turned structure (2021), and the annular outward-turned structure (2021) abuts against the groove wall of the connecting annular groove (302); And / or a heat-insulating cavity is formed between the second shell (2) and the first shell (1), and the heat-insulating cavity is arranged around the air passage cavity.

9. The diffuser nozzle according to claim 1, characterized in that: Part of the second shell (2) is located in the first installation cavity, and part of the second shell (2) extends to the outside of the first shell (1) after passing through the first opening (101). An annular groove (2011) is provided on the outer wall of the part of the second shell (2) extending to the outside of the first shell (1), and the third opening (201) is provided on one side of the second shell (2) extending to the outside of the first shell (1).

10. A hair dryer, characterized in that: include: The diffusion nozzle (100) according to any one of claims 1 to 9; A shell assembly (200), wherein the shell assembly (200) is provided with an installation cavity, the shell assembly (200) is provided with a second air inlet and a second air outlet, the installation cavity is communicated with the second air inlet and the second air outlet respectively, the diffusion nozzle (100) is connected to the shell assembly (200), the diffusion nozzle (100) is arranged at the second air outlet, and the second air outlet is communicated with the first air inlet; a fan assembly, the fan assembly being arranged on the housing assembly (200), and the fan assembly being located in the installation cavity; a heating device, the heating device being arranged on the housing assembly (200), the heating device being located in the installation cavity, and the heating device being used to heat the airflow flowing through the installation cavity; a handle assembly (300), the handle assembly (300) being arranged on the housing assembly (200); A control device is electrically connected to the heating device and the fan assembly.

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