Hair drier

Abstract

The hair dryer comprises a machine head and a handle, the machine head comprises a shell, a heat insulation barrel and a motor barrel, the heat insulation barrel and the motor barrel are arranged in the shell, a heating piece is arranged in the heat insulation barrel, a motor is arranged in the motor barrel, one end of the heat insulation barrel is provided with a first connecting part, one end of the motor barrel is provided with a second connecting part, and the first connecting part is embedded in the inner side of the second connecting part; and the heat insulation cylinder communicates with the interior of the motor cylinder to form a main air duct. According to the hair dryer, the motor barrel wraps the heat insulation barrel, it can be guaranteed that the length of the heating piece is not reduced, the heating efficiency is guaranteed, under the heat insulation effect of the heat insulation barrel, heat transmitted to the motor barrel by the heating piece can be reduced, temperature rise of the motor barrel can be reduced, and therefore heat transmitted to the motor can be reduced, and temperature rise of the motor can be reduced; the motor can work normally, and the service life of the motor can be prolonged; and moreover, the first connecting part and the second connecting part are nested and are partially overlapped in the axial direction, so that air leakage at the connecting position can be prevented, and the air outlet efficiency can be ensured.

Description

Technical Field

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

[0002] The working principle of a hair dryer is that the motor drives the fan blade to rotate, sucks air from the air inlet, and then blows it out from the front nozzle of the air duct after being heated by the heating element to dry the hair.

[0003] Existing hair dryers usually form an air duct structure in the head. The motor bracket and the heating element fixing shell are connected along the extending direction of the head to form an air duct structure. External air is sucked into the motor bracket and then flows to the heating element fixing shell and is heated by the heating element and then blown out. For example, patent CN114468512A discloses such a hair dryer. The connection method between the motor bracket and the heating element fixing shell is that one end of the motor bracket extends into the heating element fixing shell. Since the heating element is arranged in the heating element fixing shell and the internal temperature is relatively high, using the above connection method is likely to cause the motor bracket to have a relatively fast temperature rise and an excessively high temperature rise, and then transfer heat to the motor, resulting in an excessively high temperature rise of the motor, which is not conducive to the normal operation of the motor and even affects the service life of the motor. Summary of the Utility Model

[0004] In order to solve the technical problem that one end of the motor bracket in the prior art is nested in the heating element fixing shell and is easily affected by the high temperature of the heating element and deformed, affecting its service life, the utility model provides a hair dryer. By wrapping the motor barrel outside the heat insulation barrel, the temperature rise of the motor barrel can be reduced, and then the temperature rise of the motor can be reduced, ensuring that the motor can work normally.

[0005] A hair dryer disclosed by the utility model includes a head and a handle. The head includes a shell, a heat insulation barrel and a motor barrel arranged in the shell. A heating element is arranged in the heat insulation barrel, and a motor is arranged in the motor barrel. One end of the heat insulation barrel is provided with a first connection part, and one end of the motor barrel is provided with a second connection part. The first connection part is nested inside the second connection part, so that the interiors of the heat insulation barrel and the motor barrel are connected to form a main air duct.

[0006] The hair dryer of the utility model further has the following additional technical features:

[0007] One of the first connection part and the second connection part is provided with a rib and the other is provided with a slot, and the rib and the slot are inserted and matched to limit the relative rotation of the heat insulation barrel and the motor barrel.

[0008] The outer wall of the end of the heat insulation barrel far from the motor barrel is provided with a rotary buckle, and the inner wall of the shell is provided with a first card slot. The rotary buckle and the first card slot are fixed by rotary insertion.

[0009] The hair dryer is provided with a negative ion component. The outer wall of the first connecting portion is provided with convex ribs, and the second connecting portion is provided with a notch. The convex ribs are inserted from the opening end of the notch to enclose with the notch to form a wire groove for the wire of the negative ion component to extend into the heat insulation cylinder.

[0010] The hair dryer is provided with a negative ion component. The outer wall of the motor cylinder is provided with a mounting groove for mounting a negative ion generator of the negative ion component.

[0011] One end of the motor cylinder away from the heat insulation cylinder is provided with an opening, and a wind guiding member is installed at the opening. The wind guiding member includes a wind guiding cone and air inlet holes arranged circumferentially around the wind guiding cone. The wind guiding cone is used to guide the airflow to the air inlet holes.

[0012] The wind guiding cone is arranged at the center of the wind guiding member. The air inlet holes include first air inlet holes surrounding the wind guiding cone and second air inlet holes surrounding the first air inlet holes. The air flowing in from the housing flows into the main air duct through the first air inlet holes. An auxiliary air duct communicating with the inner cavity of the housing is provided in the handle, and the air flowing into the inner cavity of the housing from the auxiliary air duct flows into the main air duct through the second air inlet holes.

[0013] The wind guiding member and the motor cylinder are fixed by screws. The circumferential side wall of the wind guiding member is provided with a second clamping groove, and the circumferential inner side wall of the housing is provided with a buckle. The buckle and the second clamping groove are clamped and limited.

[0014] An auxiliary air duct communicating with the inner cavity of the housing is provided in the handle. The outer wall of the motor cylinder is provided with wind guiding ribs extending towards the air inlet end of the motor cylinder. The wind guiding ribs are in contact with the inner side wall of the housing.

[0015] The outer wall of the motor cylinder is provided with a platform portion, and a PCB board is fixed on the platform portion.

[0016] Due to adopting the above technical solution, the utility model has the following beneficial effects:

[0017] 1. In the hair dryer of the utility model, by wrapping the motor cylinder outside the heat insulation cylinder, it can ensure that the length of the heating element does not decrease, so as to ensure the heating efficiency. And under the heat insulation effect of the heat insulation cylinder, the heat transfer of the heating element to the motor cylinder can be reduced, the temperature rise of the motor cylinder can be reduced, and further the heat transfer to the motor can be reduced, the temperature rise of the motor can be reduced, which can ensure that the motor can work normally and can extend the service life of the motor; moreover, the first connecting portion and the second connecting portion are nested and partially overlap in the axial direction, which can prevent air leakage at the connecting position, so as to ensure the air outlet efficiency.

[0018] 2. As a preferred embodiment, one of the first connecting portion and the second connecting portion is provided with ribs, and the other is provided with a slot. The ribs and the slot are inserted and matched to limit the relative rotation of the heat insulation cylinder and the motor cylinder. During the process of assembling the heat insulation cylinder and the motor cylinder into an integral part and installing it into the housing, by restricting the relative rotation between the heat insulation cylinder and the motor cylinder, it is beneficial for the integral part of the heat insulation cylinder and the motor cylinder to be fitted and installed with the housing, so as to reduce the installation difficulty and improve the efficiency.

[0019] 3. As a preferred embodiment, a rotary buckle is provided on the outer wall of the end of the heat insulation cylinder away from the motor cylinder, and a first clamping groove is provided on the inner wall of the housing. The rotary buckle and the first clamping groove are fixed by rotary insertion. After the heat insulation cylinder and the motor cylinder are assembled into an integral part, they are rotatably buckled with the housing. By fixing the heat insulation cylinder to the housing, the stability of the air outlet end structure can be ensured, which is beneficial for smooth air outlet and noise reduction.

[0020] 4. As a preferred embodiment, the hair dryer is provided with a negative ion component. A convex rib is provided on the outer wall of the first connecting portion, and a notch is provided on the second connecting portion. The convex rib is inserted from the opening end of the notch to enclose with the notch to form a wire groove for the wire of the negative ion component to extend into the heat insulation cylinder. The purpose of setting the wire groove is that the wire of the negative ion component can conveniently enter the heat insulation cylinder from the outside through the wire groove. After the wire is inserted, the wire can play a certain role in closing the wire groove, preventing air leakage at this position, and the notch and the convex rib can also achieve circumferential limit.

[0021] 5. As a preferred embodiment, the hair dryer is provided with a negative ion component. An installation groove is provided on the outer wall of the motor cylinder for installing a negative ion generator of the negative ion component. Based on the fact that the motor cylinder has a good temperature under the heat insulation of the heat insulation cylinder, the negative ion generator is arranged on the outer wall of the motor cylinder. While making full use of the space, the negative ion generator can be prevented from being affected by high temperature, thus extending its service life.

[0022] 6. As a preferred embodiment, an opening is provided at the end of the motor cylinder away from the heat insulation cylinder, and a wind guiding member is installed at the opening. The wind guiding member includes a wind guiding cone and air inlet holes arranged circumferentially around the wind guiding cone. The wind guiding cone is used to guide the air flow to the air inlet holes. Under the action of the wind guiding member, when the hair dryer works, the air flow can quickly flow through the wind guiding cone to the air inlet holes and then enter the main air duct, which is beneficial to improve the air inlet efficiency and reduce the wind resistance at the same time.

[0023] As a preferred embodiment of this implementation manner, the air guiding cone is disposed at the center of the air guiding member. The air inlet holes include a first air inlet hole surrounding the air guiding cone and a second air inlet hole surrounding the first air inlet hole. The air flowing in from the housing flows into the main air duct through the first air inlet hole. An auxiliary air duct communicating with the inner cavity of the housing is provided in the handle, and the air flowing into the inner cavity of the housing from the auxiliary air duct flows into the main air duct through the second air inlet hole. By providing the auxiliary air duct, the air intake volume per unit time can be increased, which is beneficial to improving the efficiency of finally discharging hot air, so as to save the user's hair drying time; the second air inlet hole is arranged on the periphery of the first air inlet hole, which is beneficial to accelerating the air flow in the auxiliary air duct flowing into the main air duct and improving the air intake efficiency.

[0024] As a preferred embodiment of this implementation manner, the air guiding member and the motor cylinder are fixed by screws. A second clamping groove is provided on the circumferential side wall of the air guiding member, and a clamping buckle is provided on the circumferential inner side wall of the housing. The clamping buckle and the second clamping groove are clamped and limited. By fixing the air guiding member to the housing, the stability of the air inlet end structure can be ensured, and it can be avoided that the shaking of components during air intake affects the air intake efficiency and increases noise.

[0025] 7. As a preferred implementation manner, an auxiliary air duct communicating with the inner cavity of the housing is provided in the handle, and air guiding ribs extending towards the air inlet end of the motor cylinder are provided on the outer wall of the motor cylinder. The air guiding ribs are in contact with the inner side wall of the housing. By providing the air guiding ribs, on the one hand, it is beneficial to guiding the air flow flowing into the inner cavity of the housing from the auxiliary air duct to quickly reach the air inlet end of the motor cylinder and improve the air intake efficiency. On the other hand, by the contact between the air guiding ribs and the inner side wall of the housing, it can be prevented that the motor cylinder shakes in the housing under the influence of the motor vibration during the motor operation and increases noise, that is, it is beneficial to improving the operation stability of the machine and reducing noise.

[0026] 8. As a preferred implementation manner, a platform portion is provided on the outer wall of the motor cylinder, and a PCB board is fixed on the platform portion. When there is air flow between the motor cylinder and the housing, the PCB board can be cooled, which is beneficial to keeping the PCB board at a good temperature to ensure its use performance. Description of the Drawings

[0027] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation to the present invention. In the drawings:

[0028] Figure 1 is an internal cross-sectional schematic view of a hair dryer under an implementation manner of the present application.

[0029] Figure 2 is a partial component structure schematic view of the head under an implementation manner of the present application.

[0030] Figure 3 It is a schematic cross-sectional view of the connection between the heat insulation cylinder and the motor cylinder under an embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of the circumferential limiting structure between the heat insulation cylinder and the motor cylinder under an embodiment of the present application.

[0032] Figure 5 It is a schematic diagram of the separation of the heat insulation cylinder and the motor cylinder under an embodiment of the present application.

[0033] Figure 6 It is Figure 5 a schematic diagram after the heat insulation cylinder and the motor cylinder in are assembled.

[0034] Figure 7 It is a schematic layout diagram of the negative ion component under an embodiment of the present application.

[0035] Figure 8 It is an exploded schematic diagram of the air guide member, the motor and the motor cylinder under an embodiment of the present application.

[0036] Figure 9 It is a schematic assembly structure diagram of the air guide member, the motor cylinder and the housing under an embodiment of the present application.

[0037] Figure 10 It is a schematic structure diagram of the air guide rib under an embodiment of the present application.

[0038] Figure 11 It is a schematic structure diagram of the platform part under an embodiment of the present application.

[0039] Reference numerals:

[0040] 10, head; 11, handle; 12, housing; 13, heat insulation cylinder; 14, motor cylinder; 16, motor; 17, first connection part; 18, second connection part; 171, convex buckle; 181, insertion slot; 172, slot; 182, rib; 131, screw; 121, first card slot; 173, convex rib; 183, notch; 19, wire groove; 201, negative ion generator; 202, wire; 203, electrode; 141, installation groove; 21, air guide member; 211, air guide cone; 212, first air inlet hole; 213, second air inlet hole; 111, auxiliary air duct; 214, screw hole; 142, screw post; 215, second card slot; 122, buckle; 161, ring rib; 143, air guide rib; 144, platform part; 22, PCB board. Detailed implementation manners

[0041] In order to more clearly illustrate the overall concept of the present utility model, the following will be described in detail by way of example in combination with the accompanying drawings of the specification.

[0042] In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0043] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited by the specific embodiments disclosed below.

[0044] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0046] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed through a transition structure between the two connected main bodies, and they are only connected through a connection structure to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0048] As Figures 1 to 11 shown, the present application provides a hair dryer, which includes a head 10 and a handle 11. The head 10 includes a housing 12, a heat insulation cylinder 13 and a motor cylinder 14 arranged in the housing 12. A heating element is arranged in the heat insulation cylinder 13, and a motor 16 is arranged in the motor cylinder 14. One end of the heat insulation cylinder 13 is provided with a first connection portion 17, and one end of the motor cylinder 14 is provided with a second connection portion 18. The first connection portion 17 is nested inside the second connection portion 18, so that the interiors of the heat insulation cylinder 13 and the motor cylinder 14 are communicated to form a main air duct.

[0049] In the hair dryer of the present application, by wrapping the motor cylinder 14 outside the heat insulation cylinder 13, it can ensure that the length of the heating element is not reduced to ensure the heating efficiency. And under the heat insulation effect of the heat insulation cylinder 13, the heat transfer of the heating element to the motor cylinder 14 can be reduced, the temperature rise of the motor cylinder 14 can be reduced, and further the heat transfer to the motor 16 can be reduced, the temperature rise of the motor 16 can be reduced, ensuring that the motor 16 can work normally and extending the service life of the motor 16; and, the first connection portion 17 and the second connection portion 18 are nested and partially overlap in the axial direction, which can prevent air leakage at the connection position, thus ensuring the air outlet efficiency.

[0050] As Figure 1 shown, the head 10 is horizontally arranged and the handle 11 is vertically arranged. Taking the Figure 1 direction as an example, the right end of the head 10 is the air inlet end, the motor cylinder 14 is arranged close to the air inlet end, the left end of the head 10 is the air outlet end, and the heat insulation cylinder 13 is arranged close to the air outlet end. When the hair dryer works, air flows into the main air duct from the air inlet end, passes through the motor cylinder 14 and the heat insulation cylinder 13 in sequence, and the air flows out from the air outlet end after being heated by the heating element. Since the heating element is arranged inside the heat insulation cylinder 13, the internal temperature is relatively high. By wrapping the motor cylinder 14 outside the heat insulation cylinder 13, the temperature rise of the motor cylinder 14 can be effectively reduced. It can be understood that the heat resistance degree of the heat insulation cylinder 13 is greater than that of the motor cylinder 14, and the outer surface temperature of the heat insulation cylinder 13 is relatively low and will not transfer too much heat to the motor cylinder 14.

[0051] By providing the first connecting portion 17 and the second connecting portion 18, it is convenient to nest the motor cylinder 14 and the heat insulation cylinder 13, and at the same time provides conditions for their fixed connection, limit, etc. In some embodiments, the motor cylinder 14 and the heat insulation cylinder 13 are fixed by snap connection. As Figure 5 shown, the first connecting portion 17 is provided with a convex buckle 171, the second connecting portion 18 is provided with a socket groove 181. While the first connecting portion 17 and the second connecting portion 18 are nested, the motor cylinder 14 and the heat insulation cylinder 13 can be fixedly connected by snapping the convex buckle 171 into the socket groove 181. The installation steps are few and the operation is simple. In other embodiments, the first connecting portion 17 and the second connecting portion 18 are fixed by bonding, which can simplify the structures of the motor cylinder 14 and the heat insulation cylinder 13. In other embodiments, the motor cylinder 14 and the heat insulation cylinder 13 can also be fixed by other means, such as threaded connection. As Figure 3 shown, at the connection position, the inner diameter of the second connecting portion 18 is greater than the outer diameter of the first connecting portion 17 to ensure that the second connecting portion 18 wraps around the outside of the first connecting portion 17. For other regions of the motor cylinder 14, the radial dimension of the motor cylinder 14 is not limited and its shape can be set according to actual requirements.

[0052] As a preferred embodiment, one of the first connecting portion 17 and the second connecting portion 18 is provided with a rib and the other is provided with a slot. The rib and the slot are inserted and matched to limit the relative rotation of the heat insulation cylinder 13 and the motor cylinder 14. During the process of assembling the heat insulation cylinder 13 and the motor cylinder 14 into an integral part and installing it into the housing 12, by restricting the relative rotation between the heat insulation cylinder 13 and the motor cylinder 14, it is beneficial for the integral part of the heat insulation cylinder 13 and the motor cylinder 14 to be fitted and installed with the housing 12, so as to reduce the installation difficulty and improve the efficiency.

[0053] In one embodiment, as Figure 4 shown, the first connecting portion 17 is provided with a slot 172, and the inner wall of the second connecting portion 18 is provided with a rib 182. When the second connecting portion 18 wraps around the outside of the first connecting portion 17, circumferential limit can be achieved by inserting the rib 182 into the slot 172. For example, when the integral part of the heat insulation cylinder 13 and the motor cylinder 14 is installed with the housing 12 by rotary snap fit, the cooperation between the rib 182 and the slot 172 can transmit torque, eliminate the misalignment between the two in the circumferential direction, and ensure smooth installation.

[0054] As a preferred embodiment, the outer wall of one end of the heat insulation cylinder 13 away from the motor cylinder 14 is provided with a rotary buckle 131, and the inner wall of the housing 12 is provided with a first card slot 121. The rotary buckle 131 and the first card slot 121 are fixed by rotary insertion.

[0055] As Figure 2 and Figure 4As shown in the figure, after the heat insulation cylinder 13 and the motor cylinder 14 are assembled, they are installed in the housing 12. By rotating the housing 12 so that the snap 131 is inserted into the first card slot 121, the fixation of the heat insulation cylinder 13 and the housing 12 can be realized, which can ensure the stability of the air outlet end structure, facilitate smooth air outlet and reduce noise. Preferably, a structure for preventing circumferential rotation is provided between the first connecting portion 17 and the second connecting portion 18, so that the overall part of the heat insulation cylinder 13 and the motor cylinder 14 is more stable when installed on the housing 12.

[0056] As a preferred embodiment, the hair dryer is provided with a negative ion component. A rib 173 is provided on the outer wall of the first connecting portion 17, and a notch 183 is provided on the second connecting portion 18. The rib 173 is inserted from the open end of the notch 183 to enclose with the notch 183 to form a wire groove 19 through which the wire 202 of the negative ion component can extend into the heat insulation cylinder 13.

[0057] The purpose of setting the wire groove 19 is that the wire 202 of the negative ion component can conveniently enter the heat insulation cylinder 13 from the outside through the wire groove 19. After the wire 202 is inserted, the wire 202 can play a certain role in closing the wire groove 19, preventing air leakage at this position, and the cooperation between the notch 183 and the rib 173 can also realize circumferential limitation.

[0058] Specifically, as Figure 5 and Figure 6 shown, the notch 183 extends from the end of the second connecting portion 18 towards the direction close to the center of the motor cylinder 14. Preferably, the notch 183 extends to the side wall of the motor cylinder 14 outside the second connecting portion 18. As Figure 6 shown, the open end of the wire groove 19 is located on the side wall of the motor cylinder 14 below the second connecting portion 18, so that the wire 202 of the negative ion component can conveniently extend inward from the open end of the wire groove 19. Among them, the negative ion component includes an electrode 203, and the wire 202 extending into the heat insulation cylinder 13 is connected to the electrode 203, solving the installation problem of the components of the negative ion component.

[0059] As a preferred embodiment, the hair dryer is provided with a negative ion component. An installation groove 141 is provided on the outer wall of the motor cylinder 14 for installing the negative ion generator 201 of the negative ion component.

[0060] As Figure 6 and Figure 7 shown, based on the fact that the motor cylinder 14 has a good temperature under the heat insulation of the heat insulation cylinder 13, the negative ion generator 201 is arranged on the outer wall of the motor cylinder 14. While making full use of the space, the negative ion generator 201 can be prevented from being affected by high temperature, thus extending its service life. Installing the negative ion generator 201 on the motor cylinder 14 can promote the compactness of the internal structure of the heat insulation cylinder 13 and optimize the space layout.

[0061] As a preferred embodiment, one end of the motor cylinder 14 away from the heat insulation cylinder 13 is provided with an opening, and a wind guiding member 21 is installed at the opening. The wind guiding member 21 includes a wind guiding cone 211 and air inlet holes arranged circumferentially around the wind guiding cone 211. The wind guiding cone 211 is used to guide the air flow to the air inlet holes. Under the action of the wind guiding member 21, when the hair dryer works, the air flow can quickly flow through the wind guiding cone 211 to the air inlet holes and then enter the main air duct, which is beneficial to improving the air inlet efficiency and reducing the wind resistance at the same time.

[0062] As a preferred embodiment under this embodiment, as Figure 9 shown, the wind guiding cone 211 is arranged at the center of the wind guiding member 21. The air inlet holes include a first air inlet hole 212 surrounding the wind guiding cone 211 and a second air inlet hole 213 surrounding the first air inlet hole 212. The air flowing in from the housing 12 flows into the main air duct through the first air inlet hole 212. An auxiliary air duct 111 communicating with the inner cavity of the housing 12 is arranged in the handle 11, and the air flowing into the inner cavity of the housing 12 from the auxiliary air duct 111 flows into the main air duct through the second air inlet hole 213.

[0063] By providing the auxiliary air duct 111, the air inlet volume per unit time can be increased, which is beneficial to improving the efficiency of finally discharging hot air and saving the user's hair drying time; the second air inlet hole 213 is arranged on the periphery of the first air inlet hole 212, which is beneficial to accelerating the air flow in the auxiliary air duct 111 flowing into the main air duct and improving the air inlet efficiency.

[0064] It can be understood that the head 10 and the handle 11 adopt dual-channel air inlet. In order to realize the dual-channel air flow flowing into the main air duct, in other embodiments, only one air inlet hole can be provided on the radial outer side of the wind guiding cone 211. Then the external air flow and the air flow from the auxiliary air duct 111 can converge at the air inlet hole and flow into the main air duct, which can also improve the air inlet efficiency. Figure 1 The arrows in

[0065] As a preferred embodiment under this embodiment, the wind guiding member 21 and the motor cylinder 14 are fixed by screws. A second clamping groove 215 is arranged on the circumferential side wall of the wind guiding member 21, and a buckle 122 is arranged on the circumferential inner side wall of the housing 12. The buckle 122 and the second clamping groove 215 are clamped and limited.

[0066] As Figure 9 shown, the wind guiding member 21 is provided with screw holes 214, and the motor cylinder 14 is provided with screw posts 142 matching the screw holes 214. The two can be fastened by screws to improve the installation firmness. By fixing the wind guiding member 21 and the housing 12, the stability of the air inlet end structure can be ensured, and it can be avoided that the shaking of the components during air inlet affects the air inlet efficiency and increases the noise.

[0067] Furthermore, as Figure 8As shown, in some embodiments, when the motor 16 is installed in place, the two ends of the motor 16 are respectively limited by the air guide 21 and the limiting steps in the motor barrel 14, which can prevent the motor 16 from axial movement when working. For example, a shock-absorbing sleeve is provided on the outer side of the motor 16, and an annular rib 161 protruding outward is provided on the shock-absorbing sleeve. The annular rib 161 abuts against the inner wall of the motor barrel 14 to prevent the motor 16 from radial shaking when working. The annular rib 161 is made of a flexible material and can absorb vibration, which can prevent the vibration of the motor 16 from being transmitted to the motor barrel 14, which is conducive to reducing working noise.

[0068] As a preferred embodiment, the handle 11 is provided with an auxiliary air duct 111 connected to the inner cavity of the shell 12, and the outer wall of the motor barrel 14 is provided with an air guide rib 143 extending toward the air inlet end of the motor barrel 14, and the air guide rib 143 abuts against the inner wall of the shell 12.

[0069] like Figure 2 and Figure 10 As shown, by providing the wind guide ribs 143, on the one hand, it is helpful to guide the airflow flowing into the inner cavity of the shell 12 from the auxiliary air duct 111 to quickly reach the air inlet end of the motor barrel 14, thereby improving the air intake efficiency; on the other hand, the abutment between the wind guide ribs 143 and the inner wall of the shell 12 can prevent the motor barrel 14 from shaking in the shell 12 due to the vibration of the motor 16 when the motor 16 is working, thereby increasing the noise, which is helpful to improve the stability of the machine operation and reduce the noise.

[0070] As a preferred embodiment, the outer wall of the motor cylinder 14 is provided with a platform portion 144 , and the PCB board 22 is fixed to the platform portion 144 .

[0071] like Figure 1 and Figure 11 As shown, the platform portion 144 is provided with screw columns so that the PCB board 22 can be screwed. When the handle 11 is provided with an auxiliary air duct 111 that is connected to the inner cavity of the housing 12, the airflow flowing from the auxiliary air duct 111 into the inner cavity of the housing 12 can flow through the surface of the PCB board 22 during the process of flowing to the air inlet end of the motor barrel 14, which can achieve heat dissipation of the PCB board 22. At the same time, this part of the airflow also helps the heat dissipation of the motor barrel 14, which can further reduce the surface temperature of the motor barrel 14 and extend its service life.

[0072] In some embodiments, the present application is provided with two PCB boards in total, for example, a first PCB board is provided on the motor barrel 14, and a second PCB board is provided in the handle 11. Compared with the conventional whole PCB board provided in the handle 11, the present application adopts two smaller PCB boards which are separately installed in the head 10 and the handle 11. Both PCB boards occupy a smaller space. Through reasonable layout, the structure of the head 10 and the handle 11 can be made compact, and the miniaturization of the whole machine can be promoted.

[0073] The technical solution protected by the present utility model is not limited to the above embodiments. It should be noted that the combination of the technical solution of any one embodiment with the technical solutions of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, on the basis of the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all belong to the scope of protection required by the present utility model.

Claims

1. A hair dryer, comprising a head and a handle. The head includes a housing, a heat insulation cylinder and a motor cylinder disposed within the housing. A heating element is provided within the heat insulation cylinder, and a motor is provided within the motor cylinder. It is characterized in that, One end of the heat insulation cylinder is provided with a first connecting portion, and one end of the motor cylinder is provided with a second connecting portion. The first connecting portion is nested inside the second connecting portion, such that the interiors of the heat insulation cylinder and the motor cylinder are in communication to form a main air duct.

2. The hair dryer according to claim 1, characterized in that, One of the first connecting portion and the second connecting portion is provided with ribs, and the other is provided with slots. The ribs and the slots are inserted and cooperated to limit the relative rotation of the heat insulation cylinder and the motor cylinder.

3. The hair dryer according to claim 1 or 2, characterized in that, The outer wall of the end of the heat insulation cylinder away from the motor cylinder is provided with a rotary buckle, and the inner wall of the housing is provided with a first card slot. The rotary buckle and the first card slot are fixed by rotational insertion.

4. The hair dryer according to claim 1, characterized in that, The hair dryer is provided with a negative ion component. The outer wall of the first connecting portion is provided with a convex rib, and the second connecting portion is provided with a notch. The convex rib is inserted from the opening end of the notch to enclose with the notch to form a wire groove for the wire of the negative ion component to extend into the heat insulation cylinder.

5. The hair dryer according to claim 1 or 4, characterized in that, The hair dryer is provided with a negative ion component. The outer wall of the motor cylinder is provided with a mounting groove for mounting a negative ion generator of the negative ion component.

6. The hair dryer according to claim 1, characterized in that, One end of the motor cylinder away from the heat insulation cylinder is provided with an opening, and a wind guiding member is installed at the opening. The wind guiding member includes a wind guiding cone and air inlet holes circumferentially arranged around the wind guiding cone. The wind guiding cone is used to guide the air flow to the air inlet holes.

7. The hair dryer according to claim 6, characterized in that, The wind guiding cone is disposed at the center of the wind guiding member. The air inlet holes include first air inlet holes surrounding the wind guiding cone and second air inlet holes surrounding the first air inlet holes. The air flowing in from the housing flows into the main air duct through the first air inlet holes. An auxiliary air duct communicating with the inner cavity of the housing is provided within the handle. The air flowing into the inner cavity of the housing from the auxiliary air duct flows into the main air duct through the second air inlet holes.

8. The hair dryer according to claim 6, characterized in that, The wind guiding member and the motor cylinder are fixed by screws. The circumferential side wall of the wind guiding member is provided with a second card slot, and the circumferential inner side wall of the housing is provided with a buckle. The buckle and the second card slot are engaged and limited.

9. The hair dryer according to claim 1, characterized in that, An auxiliary air duct communicating with the inner cavity of the housing is provided within the handle. The outer wall of the motor cylinder is provided with wind guiding ribs extending towards the air inlet end of the motor cylinder. The wind guiding ribs are in contact with the inner side wall of the housing.

10. The hair dryer according to claim 1, characterized in that, The outer wall of the motor cylinder is provided with a platform portion, and a PCB board is fixed to the platform portion.

Images