CN220124147U - Diffuser and blower - Google Patents

Abstract

The utility model discloses a diffuser and a blower, the diffuser comprises a main extension axis, a shell and an air outlet grille, the diffuser is provided with an air inlet end, an air outlet end larger than the air inlet end and a wall extending between the air inlet end and the air outlet end, the air inlet end comprises an air inlet for receiving air flow, the wall of the shell defines an air diffusion chamber, the chamber is a closed loop chamber formed around the main extension axis, the shell is curved when seen in a section comprising the main extension axis, the air outlet grille is gradually unfolded from the air inlet end to the air outlet end, the air outlet grille is arranged at the air outlet end, the air outlet grille comprises at least two sub-parts which are sequentially arranged along the circumference of the main extension axis, and the outer diameter of the sub-parts is gradually increased along the wind direction. The diffuser has the advantages of simple structure, high diffusion efficiency, low cost and the like.

Description

Diffuser and blower

Technical Field

The utility model relates to the field of hair care, in particular to a diffuser and a blower.

Background

The hair dryer is formed by combining an electric heating wire and a high-rotation-speed small fan, and hot air is blown out through the cooperation of the resistance wire and the fan so as to quickly dry hair. In addition, hair dryers are also used for hair styling. The end part of the air flow outlet of the blower can be connected with an accessory, and the air flow is concentrated or dispersed through the accessory, so that the modeling purpose is achieved. Diffusers are known forms of attachment for hair dryers. The diffuser is attached to the air flow outlet end of the hair dryer and serves to more evenly and disperses the air flow emitted from the hair dryer before it is incident on the hair of the user, achieving a fluffy and plump styling effect.

In the related art, the diffuser of the blower is unreasonable in setting, the air flow diffusion effect is poor, the air outlet is still concentrated in the central part of the diffuser, the phenomenon that the temperature of the air outlet of the central air outlet is higher than that of the air outlet of the peripheral air outlet easily occurs, the air outlet air flow and the temperature are uneven, and the modeling effect is influenced.

Disclosure of Invention

The present utility model has been made based on the findings and knowledge of the inventors regarding the following facts and problems:

in the related art, for example, 202122406276.8-diffusing nozzle and hair dryer, the air outlet grille of the diffuser of the electric hair dryer is composed of an independent geometric shape, and the independent geometric shape is more regular, so that the disturbing diffusion effect on the air flow is limited, and the diffusion effect of the diffuser is poor.

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

For this reason, the embodiment of the utility model provides a diffuser with simple structure and good diffusion effect.

The embodiment of the utility model provides a blower with low cost and convenient use.

A diffuser according to an embodiment of the present utility model includes: a main extension axis; a housing having an airflow inlet end, an airflow outlet end greater than the airflow inlet end, and a wall extending between the airflow inlet end and the airflow outlet end, the airflow inlet end including an airflow inlet for receiving an airflow, the wall of the housing defining an air diffusion chamber, the chamber being a closed loop chamber formed about the primary extension axis, the housing being curved as seen in a cross section including the primary extension axis and gradually expanding from the airflow inlet end to the airflow outlet end; the air outlet grille is arranged at the end part of the air flow outlet, the air outlet grille comprises at least two sub-parts which are sequentially arranged along the circumferential direction of the main extension axis, the sub-parts are used for assisting air flow diffusion, and the outer diameters of the sub-parts are gradually increased along the wind direction.

According to the diffuser provided by the embodiment of the utility model, through the plurality of sub-parts which are sequentially arranged along the circumferential direction of the main extension axis, the air flow can flow out of the diffuser through the plurality of sub-parts, the air speed of the air flow flowing out is reduced, and the disturbing diffusion effect of the air flow is improved.

In some embodiments, viewed from the main extension axis direction, the sub-portion is provided with a plurality of air outlet holes penetrating through the sub-portion along the main extension axis direction, and the maximum outer diameter of the sub-portion is greater than the axial length of the sub-portion, and the shape and the size of any two adjacent sub-portions are the same.

In some embodiments, the outlet grille is radially symmetrical with respect to the main extension axis and/or a plurality of the sub-portions are rotationally symmetrical with respect to the main extension axis.

In some embodiments, the air outlet grille further comprises a plurality of wind shielding portions, at least one of which is disposed between two adjacent sub-portions, such that the wind shielding portions block the airflow from flowing.

In some embodiments, the diffuser further comprises: the first air outlet parts are arranged at one side of the air outlet grating far away from the cavity and are arranged at intervals along the circumferential direction of the main extension axis, and each first air outlet part is provided with a first air outlet cavity communicated with the cavity; the second air outlet parts are arranged on one side, far away from the cavity, of the air outlet grating and are arranged along the circumferential interval of the main extension axis, the first air outlet parts and the second air outlet parts are arranged along the radial interval of the main extension axis, the wind shielding parts are positioned between the first air outlet parts and the second air outlet parts, the first air outlet parts are arranged around the second air outlet parts, the first air outlet parts are arranged towards the second air outlet parts to emit air flow, and the second air outlet parts are arranged towards the first air outlet parts to emit air flow.

In some embodiments, the diffuser further comprises a plurality of third air outlet portions provided on a side of the air outlet grille remote from the chamber and arranged around the main extension axis, at least one third air outlet portion being provided on each sub-portion, the third air outlet portions being located on a side of the sub-portions remote from the second air outlet portions, the third air outlet portions being arranged to emit an air flow towards the main extension axis.

In some embodiments, the diffuser further comprises a plurality of fourth air outlet portions, the fourth air outlet portions are arranged on the air outlet grille and are located among the plurality of sub-portions, the fourth air outlet portions are recessed toward the air flow inlet end portions, a plurality of air flow outlets extending along the circumferential direction of the main extension axis are arranged on the fourth air outlet portions, and a plurality of air flow outlets are arranged at intervals along the circumferential direction of the main extension axis.

In some embodiments, the diffuser further comprises a diffuser mesh, the diffuser mesh is arranged in the cavity and is spaced from the air outlet grille along the main extension axis direction, and the distance between the sub-part and the diffuser mesh in the main extension axis direction is 10mm-50mm.

In some embodiments, the housing comprises an inner shell and an outer shell, the inner shell is sleeved in the outer shell and is arranged opposite to the outer shell along the radial interval of the main extension axis, the chamber, the airflow inlet end and the airflow outlet end are all formed on the inner shell, the diffuser further comprises a mounting part and a permanent magnet, the mounting part is arranged at the airflow inlet end, the mounting part is suitable for being connected with a blower, and the permanent magnet is arranged in the mounting part.

A blower according to an embodiment of the present utility model includes: the body is provided with a handheld part and an air outlet part; a diffuser according to any one of the above embodiments, the diffuser being provided on the air outlet portion.

Drawings

Fig. 1 is an exploded view of a diffuser according to an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of a diffuser according to an embodiment of the present utility model.

Fig. 3 is a left side view of a diffuser according to an embodiment of the present utility model.

A diffuser 100;

a main extension axis 1;

a housing 2; a chamber 21; an airflow inlet end 22; an air flow outlet end 23; an inner housing 24; a housing 25;

a gas outlet grating 3; a sub-portion 31; an air outlet hole 32; a wind shielding part 33;

a first air outlet 4;

a second air outlet part 5; a diffusion net 6; a mounting portion 7; a permanent magnet 8; a third air outlet 9; a fourth air outlet 10; an air flow outlet 101.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A blower according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1-3, a blower according to an embodiment of the present utility model includes a body (not shown) and a diffuser 100.

The body is provided with a handheld part and an air outlet part. The diffuser 100 comprises a main extension axis 1, a housing 2 and an outlet grill 3.

The housing 2 has an airflow inlet end 22, an airflow outlet end 23 that is larger than the airflow inlet end 22, and a wall extending between the airflow inlet end 22 and the airflow outlet end 23, the airflow inlet end 22 including an airflow inlet for receiving an airflow, the wall of the housing 2 defining an air diffusion chamber 21, the chamber 21 being a closed loop chamber 21 formed around the main extension axis 1, the housing 2 being curved and gradually expanding from the airflow inlet end 22 to the airflow outlet end 23 as seen in a section including the main extension axis 1 (in an inward and outward direction as shown in fig. 1). Specifically, as shown in fig. 1-2, the main extension axis 1 extends in the left-right direction, the housing 2 has a chamber 21 penetrating the housing 2 in the left-right direction, an air flow outlet end 23 is provided at the left end of the housing 2 and communicates with the chamber 21, an air flow inlet end 22 is provided at the right end of the housing 2 and communicates with the chamber 21 and the air outlet portion, respectively, to blow air blown by the blower into the chamber 21 through the air flow inlet end 22 and then blow out through the air flow outlet end 23, the cross-sectional area of the inner peripheral surface of the housing 2 gradually decreases from left to right and the housing 2 is curved, in other words, the housing 2 is in a diffusing shape, thereby assisting the diffusion of the air flow in the housing 2.

The air outlet grille 3 is disposed at the air outlet end 23, and the air outlet grille 3 includes at least two sub-portions 31 disposed in sequence along the circumferential direction of the main extension axis 1, the sub-portions 31 being for assisting air flow diffusion, the outer diameter of the sub-portions 31 gradually increasing along the wind direction, the sub-portions 31 being recessed toward one end adjacent to the air inlet end 22 as viewed in the radial direction of the main extension axis 1 (the inward and outward directions as viewed in fig. 1). Specifically, as shown in fig. 1-3, the air grid 3 is disposed at the air outlet end 23, the plurality of sub-portions 31 are sequentially distributed clockwise (or anticlockwise) around the main extension axis 1, the cross-sectional area of each sub-portion 31 is gradually increased from right to left when seen from left to right, and each sub-portion 31 is recessed toward right, so that the sub-portions 31 form a grid surface, and the air flows between the sub-portions 31 interfere with each other, thereby achieving better disturbing and diffusing effects of the air flow blown out from the air outlet portion, and achieving a fluffy and plump shaping effect when drying and shaping the hair.

According to the diffuser 100 of the embodiment of the utility model, through the plurality of sub-parts 31 which are sequentially arranged along the circumferential direction of the main extension axis 1, air flows out of the diffuser 100 through the plurality of sub-parts 31, so that the air speed of the air flows out is reduced, the disturbing diffusion effect of the air flow is improved, and the diffusion of the air flow and the uniformity of the air flow temperature are improved.

In some embodiments, the sub-portion 31 is provided with a plurality of air outlet holes 32 penetrating the sub-portion 31 along the main extension axis 1 when viewed from the main extension axis 1 direction (left-right direction as shown in fig. 1), and the maximum outer diameter of the sub-portion 31 is greater than the axial length thereof. Specifically, as shown in fig. 1-2, the sub-portion 31 is provided with a plurality of air outlet holes 32 penetrating the sub-portion 31 in the left-right direction, so that the air flow in the housing 2 flows out of the housing 2 through the air outlet holes 32, and the outer diameter of the left end face of the sub-portion 31 is larger than the dimension of the sub-portion 31 in the left-right direction, thereby ensuring the size of the cross-sectional area of the sub-portion 31 and ensuring the diffusion effect of the sub-portion 31.

In some embodiments, any two adjacent sub-portions 31 are identical in shape, size, radial symmetry of the outlet grille 3 with respect to the main extension axis 1, and/or rotational symmetry of the plurality of sub-portions 31 with respect to the main extension axis 1. Specifically, as shown in fig. 3, the shape of the sub-portion 31 may be set according to practical situations, for example, the shape of the sub-portion 31 may be a sphere, a rectangular surface, an ellipsoid, etc., all the sub-portions 31 are all symmetrical, and two adjacent sub-portions 31 may be radially symmetrical about the main extension axis 1, and any two adjacent sub-portions 31 are rotationally symmetrical about the main extension axis 1 (or centrally symmetrical about the main extension axis 1), so that when the airflow in the chamber 21 flows through each sub-portion 31, the diffusion degree of the airflow flowing out of each sub-portion 31 is substantially uniform, which is beneficial to uniform diffusion of the airflow.

In some embodiments, the plurality of sub-portions 31 are preferably each spherical surfaces recessed toward the airflow inlet end 22. Thereby, the manufacturing difficulty of the sub-portion 31 is reduced, so that the arrangement of the air outlet grille 3 is more reasonable.

In some embodiments, the number of sub-portions 31 is 3-5. Specifically, the number of the sub-portions 31 may be set according to the selection, and the sub-portions 31 may be any one of 3, 4, and 5, when the number of the sub-portions 31 is less than 3, the number of the sub-portions 31 of the air outlet grill 3 will be small, resulting in poor air flow diffusion effect, and when the number of the sub-portions 31 is greater than 5, the manufacturing difficulty and the manufacturing cost of the air outlet grill 3 will be increased.

In some embodiments, the air outlet grille 3 further comprises a plurality of wind shielding portions 33, at least one wind shielding portion 33 being provided between two adjacent sub-portions 31, such that the wind shielding portion 33 blocks the circulation of air flow. Specifically, as shown in fig. 3, the wind shielding portion 33 may be a wind shielding plate, and two adjacent sub-portions 31 are disposed at equal intervals along the circumferential direction of the main extension axis 1, and the wind shielding portion 33 is disposed between two adjacent sub-portions 31, in other words, the plurality of sub-portions 31 are spaced apart clockwise or counterclockwise about Zhou Xiangcheng of the main extension axis 1, which may further enhance uniformity of air emitted from the air outlet portion of the diffuser 100, and may reduce the speed of air flow emitted from the diffuser 100, while making the air outlet temperature more uniform.

In some embodiments, the diffuser 100 further comprises a plurality of first air outlets 4 and a plurality of second air outlets 5.

The first air outlet portions 4 are all disposed at a side of the air outlet grille 3 away from the cavity 21 and are disposed at intervals along the circumferential direction of the main extension axis 1, and the first air outlet portions 4 have a first air outlet cavity (not illustrated in the figure) that communicates with the cavity 21. The second air outlet portions 5 are arranged on one side, far away from the cavity 21, of the air outlet grating 3 and are arranged at intervals along the circumferential direction of the main extension axis 1, the first air outlet portions 4 and the second air outlet portions 5 are arranged opposite to each other along the radial direction of the main extension axis 1, the wind shielding portions 33 are located between the first air outlet portions 4 and the second air outlet portions 5, the first air outlet portions 4 are arranged around the second air outlet portions 5, the first air outlet portions 4 are arranged to emit air flow towards the second air outlet portions 5, and the second air outlet portions 5 are arranged to emit air flow towards the first air outlet portions 4.

Specifically, as shown in fig. 1 to 3, the first air outlet portion 4 and the second air outlet portion 5 are cylindrical or conical protrusions and are provided on the left side surface of the air outlet grille 3, the first air outlet portion 4 and the second air outlet portion 5 are each extended in parallel or slightly inclined with respect to the left-right direction, the first air outlet portion 4 and the second air outlet portion 5 are each provided with a hollow space and include air outlets, the plurality of first air outlet portions 4 are provided on the outer peripheral side of the plurality of sub-portions 31 at intervals in the circumferential direction of the housing 2, the plurality of second air outlet portions 5 are provided on the inner peripheral side of the plurality of sub-portions 31 at intervals in the circumferential direction of the housing 2, and the plurality of first air outlet portions 4, the plurality of sub-portions 31 and the plurality of second air outlet portions 5 are provided opposite to each other from outside to inside at intervals, the air outlets of the first air outlet portions 4 are provided inward in the inside-outside direction, and the air outlets of the second air outlet portions 5 are provided outward in the inside-outside direction, whereby, when drying hair, the first air outlet portions 4 and the second air outlet portions 5 extend inside the hair to dry.

In some embodiments, the diffuser 100 further comprises a plurality of third air outlet portions 9, the third air outlet portions 9 being provided on a side of the air outlet grille 3 remote from the chamber 21 and being arranged around the main extension axis 1, at least one third air outlet portion 9 being provided on each sub-portion 31, the third air outlet portions 9 being located on a side of the sub-portions 31 remote from the second air outlet portions 5, the third air outlet portions 9 being arranged to emit an air flow towards the main extension axis 1. Specifically, as shown in fig. 3, the third air outlet portion 9 is a cylindrical or conical protruding portion and is disposed on the left side surface of the air outlet grille 3, the third air outlet portion 9 extends parallel to the left-right direction or slightly inclined with respect to the left-right direction and has a hollow space and includes air flow outlets, the plurality of third air outlet portions 9 and the plurality of second air outlet portions 5 are disposed alternately one by one along the circumferential direction of the main extension axis 1, and the third air outlet portions 9 are disposed on the sub portion 31, and the air flow outlets of the third air outlet portions 9 are disposed inwardly along the inner and outer directions, thereby the arrangement of the first air outlet portion 4, the second air outlet portion 5 and the third air outlet portions 9 reasonably utilizes the spatial distribution of the air outlet grille 3, and the air flow diffusion is also improved.

In some embodiments, the airflow outlet of each of the first wind outlet portions 4 is preferably arranged to emit the airflow in a respective radially outward direction, that is to say in a respective direction extending away from the longitudinal main extension axis 1 of the diffuser 100. Conversely, the airflow outlet of each of the second air outlet portions 5 is preferably arranged to emit an airflow in a respective radially inward direction, in other words, the airflow outlet of each of the second air outlet portions 5 is in a respective direction extending towards the longitudinal main extension axis 1 of the diffuser 100.

In some embodiments, the diffuser 100 further includes a plurality of fourth air outlet portions 10, where the fourth air outlet portions 10 are disposed on the air outlet grille 3 and located between the plurality of sub-portions 31, the fourth air outlet portions 10 are recessed toward the air flow inlet end 22, a plurality of air flow outlets extending along the circumferential direction of the main extension axis 1 are disposed on the fourth air outlet portions 10, and the plurality of air flow outlets are disposed at intervals along the circumferential direction of the main extension axis 1. Specifically, as shown in fig. 1 to 3, the fourth air outlet portion 10 is a cambered surface recessed rightward in the left-right direction and a dome is formed at the center of the fourth air outlet portion 10, so that when the air flows toward the fourth air outlet portion 10, the air flows outwardly in the inside-outside direction through the fourth air outlet portion 10, 4 arc-shaped air flow outlets (4 as shown in fig. 3) are provided on the fourth air outlet portion 10, the four air flow outlets are distributed at intervals clockwise or counterclockwise around the center of the fourth air outlet portion 10 along the main extension axis 1, the four air flow outlets are disposed away from the center of the fourth air outlet portion 10 and the main extension axis 1 passes through the center of the fourth air outlet portion 10, whereby the fourth air outlet portion 10 can prevent the air from flowing along the main extension axis 1, the air outlet portion at the center is reduced, and in addition, the direction of the air flow outlet end 23 forms an angle with the main extension axis 1, so that the air outlet end 23 is advantageous for the lateral outflow of the air flow.

In some embodiments, the diffuser 100 further comprises a diffuser mesh 6, the diffuser mesh 6 being disposed within the chamber 21 and spaced from the outlet grille 3 along the main extension axis 1, the sub-portions 31 being spaced from the diffuser mesh 6 by a distance of 10mm to 50mm along the main extension axis 1.

Specifically, as shown in fig. 1-2, the diffusion net 6 may be a metal net and fixed in the housing 2 by a fastener (e.g., a screw), the diffusion net 6 is disposed opposite to the air outlet grille 3 in a left-right direction at intervals, an outer circumferential surface of the diffusion net 6 is attached to an inner circumferential surface of the housing 2, and when the air flow flowing into the housing 2 passes through fine mesh openings of the diffusion net 6 through the diffusion net 6, energy of the air flow is lost, thereby further reducing the speed of the air flow emitted from the diffuser 100, and uniformity of the air flow emitted from the air outlet portion can be improved by both distribution and speed, thereby performing preliminary diffusion on the air flow through the diffusion net 6, thereby improving efficiency of the air flow diffusion.

In some embodiments, the diffusing screen 6 and the air outlet preferably have different shapes, and the diffusing screen 6 is preferably positioned generally midway between the air inlet end 22 and the air outlet end 23 of the housing 2, and the diffusing screen 6 is preferably a metal screen with very fine round holes distributed on the surface, the diameter of the round holes being about 0.2mm, and the air flow coming out through the fine holes will form the first air flow diffusion.

In some embodiments, the diffusion net 6 may be plural, and plural diffusion nets 6 are disposed in the chamber 21 at intervals in the left-right direction. Thereby, the diffusion efficiency of the diffuser 100 is further improved.

In some embodiments, the sub-portion 31 is spaced from the diffusion web 6 in the direction of the main extension axis 1 by a distance of 10mm to 50mm. Specifically, the distance between the right side surface of the sub-portion 31 and the left side surface of the diffusion net 6 in the left-right direction may be any of 10mm, 20mm, 0mm, 40mm, 50mm, etc., and when the distance is smaller than 10mm, insufficient dispersion of air flow between the diffusion net 6 and the sub-portion 31 will result, and when the distance is larger than 50mm, excessive size of the housing 2 in the left-right direction will result, leading to an increase in manufacturing cost of the diffuser 100. Therefore, the distance between the sub-part 31 and the diffusion net 6 in the direction of the main extension axis 1 is 10mm-50mm, and the air flow is fully dispersed between the air outlet grille 3 and the diffusion net 6 without increasing the processing and manufacturing cost of the diffuser 100, so that the diffuser 100 is more reasonably arranged.

Since the air flow from the blower is typically hot air, in some embodiments the housing 2 includes an inner housing 24 and an outer housing 25, the inner housing 24 being nested within the outer housing 25 and disposed opposite the outer housing 25 at a radial spacing along the main extension axis 1, and the chamber 21, the air flow inlet end 22, and the air flow outlet end 23 are formed on the inner housing 24. Specifically, as shown in fig. 1, the inner casing 24 may be mounted in the outer casing 25 by means of fasteners, fastening, bonding, integral molding, etc., the chamber 21 is formed in the inner casing 24, the air outlet end 23 is formed at the left end of the inner casing 24, the air inlet end 22 is formed at the right end of the inner casing 24, and the diffusion net 6 and the diffusion surface are both provided in the inner casing 24, whereby the arrangement of the double casings 2 of the inner casing 24 and the outer casing 25 serves to insulate against heat and prevent the external accessible portion of the casing 2 from overheating.

In some embodiments, the diffuser 100 further comprises a mounting portion 7 and a permanent magnet 8.

A mounting portion 7 is provided at the air inlet end 22, the mounting portion 7 being adapted to be connected to a blower, and a permanent magnet 8 being provided in the mounting portion 7. Specifically, as shown in fig. 1, the mounting portion 7 may be mounted at the right end of the housing 2 by means of fasteners, fastening, bonding, integral molding, etc., the permanent magnet 8 is embedded in the mounting portion 7, and the air outlet portion of the blower is provided with a magnetic attraction portion that is matched with the permanent magnet 8, thereby detachably mounting the mounting portion 7 at the air outlet portion by the permanent magnet 8 and the magnetic attraction portion being matched.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A diffuser, comprising: a main extension axis; a housing having an airflow inlet end, an airflow outlet end greater than the airflow inlet end, and a wall extending between the airflow inlet end and the airflow outlet end, the airflow inlet end including an airflow inlet for receiving an airflow, the wall of the housing defining an air diffusion chamber, the chamber being a closed loop chamber formed about the primary extension axis, the housing being curved as seen in a cross section including the primary extension axis and gradually expanding from the airflow inlet end to the airflow outlet end; the air outlet grille is arranged at the end part of the air flow outlet, the air outlet grille comprises at least two sub-parts which are sequentially arranged along the circumferential direction of the main extension axis, the sub-parts are used for assisting air flow diffusion, and the outer diameters of the sub-parts are gradually increased along the wind direction.

2. The diffuser of claim 1, wherein, seen from the main extension axis direction, the sub-portions are provided with a plurality of air outlet holes penetrating through the sub-portions along the main extension axis direction, and the maximum outer diameter of the sub-portions is greater than the axial length thereof, and the shape and the size of any two adjacent sub-portions are the same.

3. A diffuser according to claim 1 wherein the outlet grille is radially symmetrical with respect to the main extension axis and/or a plurality of the sub-portions are rotationally symmetrical with respect to the main extension axis.

4. The diffuser of claim 1, wherein said air outlet grill further comprises a plurality of air blocking portions, at least one of said air blocking portions being disposed between adjacent two of said sub-portions such that said air blocking portions block the flow of said air.

5. The diffuser of claim 4, further comprising:

the first air outlet parts are arranged at one side of the air outlet grating far away from the cavity and are arranged at intervals along the circumferential direction of the main extension axis, and each first air outlet part is provided with a first air outlet cavity communicated with the cavity;

the second air outlet parts are arranged on one side, far away from the cavity, of the air outlet grating and are arranged along the circumferential interval of the main extension axis, the first air outlet parts and the second air outlet parts are arranged along the radial interval of the main extension axis, the wind shielding parts are positioned between the first air outlet parts and the second air outlet parts, the first air outlet parts are arranged around the second air outlet parts, the first air outlet parts are arranged towards the second air outlet parts to emit air flow, and the second air outlet parts are arranged towards the first air outlet parts to emit air flow.

6. The diffuser of claim 5, further comprising a plurality of third air outlet portions provided on a side of the air outlet grille remote from the chamber and arranged around the main extension axis, at least one of the third air outlet portions being provided on each of the sub-portions, the third air outlet portions being located on a side of the sub-portions remote from the second air outlet portions, the third air outlet portions being arranged to emit an air flow towards the main extension axis.

7. The diffuser of claim 1, further comprising a plurality of fourth air outlet portions provided on said air outlet grille and between a plurality of said sub-portions, said fourth air outlet portions being recessed toward an air flow inlet end, said fourth air outlet portions being provided with a plurality of air flow outlets extending circumferentially along said main extension axis and a plurality of said air flow outlets being disposed at circumferentially spaced intervals along said main extension axis.

8. The diffuser of claim 1, further comprising a diffuser screen disposed within said chamber and spaced from said air outlet grille along said main axis of extension, said sub-portions being spaced from said diffuser screen by a distance of 10mm to 50mm in said main axis of extension.

9. The diffuser of claim 1 wherein said housing comprises an inner shell and an outer shell, said inner shell being nested within said outer shell and disposed opposite said outer shell at a radial spacing along said main extension axis, said chamber, said air flow inlet end and said air flow outlet end being formed on said inner shell,

the diffuser further comprises a mounting portion and a permanent magnet, wherein the mounting portion is arranged at the air flow inlet end portion, the mounting portion is suitable for being connected with a blower, and the permanent magnet is arranged in the mounting portion.

10. A hair dryer, comprising:

the body is provided with a handheld part and an air outlet part;

a diffuser according to any one of claims 1 to 9, provided on the air outlet.