CN114587058A - Hair drier - Google Patents

Abstract

The invention provides a blower which comprises a shell with an air inlet, a handle connected with the shell and a heater assembly arranged in the shell, wherein the heater assembly comprises a heating element, an air outlet is arranged between the air inlet and the heating element, and the air outlet guides part of air flow entering the shell from the air inlet into the handle. The design of the heat dissipation channel of the handle of the hair dryer provided by the invention enables the handle to be provided with the circuit component and dissipate heat, and avoids safety accidents caused by damage to the circuit component due to overhigh temperature rise. Through set up circuit assembly in the handle, and then can make the hair-dryer shell make miniaturized, convenient to use and carry. In addition, the double-switch assembly of the switch mechanism saves a larger space in the handle by using a new layout design, and the handle can be provided with a sufficient space for arranging the circuit assembly.

Description

Hair drier

Technical Field

The invention relates to the field of household appliances, in particular to a hair drier.

Background

In daily life, hair dryers are widely used. The conventional hair dryer generally includes a casing and a handle, the casing includes a rectifying wing assembly, a heater assembly and a circuit assembly, the rectifying wing assembly includes a motor and a blade, wherein the motor can drive the blade to rotate, when the blade rotates, air is sucked from an air inlet arranged on the casing, and a centrifugal air flow formed by the air is heated by a heating wire in the heater assembly and then blown out from a front end.

Since the case becomes hot when the hair dryer uses hot wind for a long time, and the circuit component provided in the case occupies a certain volume and generates heat when operating, heat dissipation is required. Fig. 1 is a schematic cross-sectional view of a hair dryer of the related art, and as shown in fig. 1, a circuit assembly 100 of the hair dryer is disposed on a downstream side of a wing assembly 200, and an air flow generated by rotation of blades of the wing assembly 200 may pass through the circuit assembly 100, thereby enabling heat dissipation and cooling of the circuit assembly 100 to some extent.

Disclosure of Invention

Technical problem to be solved by the invention

However, the above-described heat dissipation structure causes a new problem in that the casing of the hair dryer becomes relatively large in the longitudinal direction because the circuit assembly 100 of the hair dryer is disposed on the downstream side of the fairing assembly 200. Therefore, it is an urgent technical problem to consider heat dissipation of the circuit components and miniaturization of the hair dryer.

Solution for solving the above technical problem

In order to solve the above problems, the present invention provides a hair dryer including a casing having an air inlet, a handle connected to the casing, and a heater assembly provided in the casing, the heater assembly including a heating element, an air outlet provided between the air inlet and the heating element, the air outlet guiding a part of an air flow entering the casing from the air inlet to the handle.

According to the technical scheme, one part of the air flow entering the shell from the air inlet can enter the air outlet and is guided into the handle under the condition that the air flow is not heated by the heating element of the heater assembly, and the rest part of the air flow can still pass through the heater assembly and is discharged from the front end, so that when the air is introduced into the shell of the hair dryer, a branch is formed, one path of air flow is discharged by the air outlet to perform subsequent work, and the other path of air flow can still be discharged from the front end to achieve the effect of blowing.

Preferably, the handle is formed with heat dissipation holes, and the air outlet is communicated with the heat dissipation holes to form a heat dissipation channel for air flow to flow through. More preferably, the heat dissipation aperture is formed in the handle at an end remote from the housing. Preferably, the air outlet or the heat radiating hole is formed in plurality.

According to the technical scheme, the heat dissipation holes are formed in the handle, the air outlet is communicated with the heat dissipation holes to form the heat dissipation channel through which the air flows, so that the air flows out of the heat dissipation holes after entering the air outlet, all parts in the heat dissipation channel can be dissipated by utilizing the flowing of the air flow, and a good heat dissipation effect is achieved. In addition, the air outlet on the shell is communicated with one end of the handle, and the heat dissipation hole is located at the other end, far away from the shell, of the handle, so that the distance of the heat dissipation channel is long, and the heat dissipation effect is enhanced. Moreover, a plurality of air outlets and a plurality of louvre can increase intake and air output, are favorable to leading-in more air currents and increase the velocity of flow of air current, have further strengthened the radiating effect.

Preferably, a circuit component is provided in the handle, the circuit component being disposed at a position in contact with the air flow circulating in the heat dissipation passage.

According to the technical scheme, the heat dissipation channel is formed in the handle, the circuit assembly is arranged at the position contacted with the air flow circulating in the heat dissipation channel, and the circuit assembly can be effectively cooled when the air flow passes through the heat dissipation channel. From this, through setting up circuit module in the position that carries out direct contact with the heat dissipation air current, can further strengthen the radiating effect, avoid circuit module's high temperature, prolong circuit module's life, and then effectively prolong the life of hair-dryer, can also avoid the incident that circuit module temperature rise too high arouses. In addition, since the circuit component is arranged in the handle, the circuit component is not required to be arranged in the shell, so that the shell is not required to be designed to be long in the length direction, and the miniaturization of the hair dryer is realized.

Preferably, the blower further comprises a wing fairing assembly disposed between the air inlet and the heater assembly, the wing fairing assembly having a motor, a main air duct disposed on a side of the heater assembly remote from the motor, and air sucked through the wing fairing assembly heated by the heater assembly and then flowing out of the main air duct.

According to the technical scheme, the rectifying wing assembly comprises the motor and the blades, the blades are driven to rotate when the motor operates, air is sucked into the shell of the hair dryer from the air inlet and flows in the shell to generate air flow, the other path of air flow is heated by the heater assembly and then is exhausted from the front end of the shell through the main air duct, the heating function in the prior art is not affected, and hair or clothes can still be dried.

Preferably, the fairing assembly further comprises a fairing housing, the heater assembly further comprises a heating housing, the fairing housing and the heating housing are connected to each other, and the air outlet is provided in one of the fairing housing and the heating housing.

According to the technical scheme, the rectifying outer cover and the heating outer cover are connected with each other to form a basically closed space, the air outlet is formed in one of the rectifying outer cover and the heating outer cover, and the operation is simple and efficient.

Preferably, a switch mechanism is provided in the handle, the switch mechanism being disposed at a position opposed to the circuit assembly, the heat dissipation passage passing between the switch mechanism and the circuit assembly. More preferably, the switch mechanism includes a switch lever and a dual switch assembly including a first switch assembly and a second switch assembly disposed along a length of the handle.

According to the technical scheme, the switch mechanism is arranged in the handle, the switch mechanism is arranged at the position opposite to the circuit component, the switch mechanism comprises the switch operating rod and the double switch components, the double switch components comprise the first switch component and the second switch component which are sequentially arranged along the length direction of the handle, and therefore the heat dissipation channel passes through the position between the switch mechanism and the circuit component by means of structural innovative design. Specifically, because the first switch assembly and the second switch assembly are arranged along the length direction of the handle, compared with the situation that the switch assemblies are arranged along the width direction of the handle in the prior art, so that the width of the switch assemblies almost occupies the whole width of the handle, by utilizing the vertical design along the length direction, a larger space is saved for the handle, so that enough space is available on the handle for placing the circuit assemblies and the circuit assemblies can be arranged at the positions opposite to the switch mechanisms.

Preferably, the switch operating lever includes a first lever main body, a second lever main body, and a first connecting portion and a second connecting portion extending from the first lever main body and the second lever main body along a length direction of the handle, respectively, and the first connecting portion and the second connecting portion are connected to the first switch assembly and the second switch assembly, respectively.

According to the technical scheme, the first connecting portion and the second connecting portion are driven to move by operating the first rod main body and the second rod main body, so that the first switch assembly and the second switch assembly can realize the change of the on-off of the circuit, and finally the effect of rapidly switching the on-off of the hair drier or the working mode is achieved.

Effects of the invention

(1) According to the present invention, since the air outlet is provided between the wing fairing assembly and the heater assembly, a part of the air flow generated by the wing fairing assembly can enter the air outlet without being heated by the heater assembly, while the rest of the air flow can still pass through the heater assembly and then be discharged from the front nozzle, thereby performing a shunting when the air is introduced into the housing of the hair dryer.

(2) According to the invention, on the basis of the technical effects, the air outlet is communicated with the heat dissipation holes to form the heat dissipation channel through which air flows, so that the air flow flows out of the heat dissipation holes after entering the air outlet, all parts in the heat dissipation channel can be dissipated by utilizing the flow of the air flow, and a good heat dissipation effect is achieved.

(3) According to the present invention, in addition to the above-described technical effects, since the circuit module is provided in the handle and the circuit module is disposed at a position where the circuit module is in contact with the air current flowing through the heat dissipation passage, the circuit module can be effectively cooled when the air current passes through the heat dissipation passage. In addition, since the circuit component is provided in the handle, it is not necessary to provide it in the housing, and miniaturization of the hair dryer is achieved. As described above, the heat dissipation of the circuit assembly and the miniaturization of the hair dryer are both achieved by the provision of the air outlet and the heat dissipation passage.

(4) According to the invention, on the basis of the technical effects, the first switch assembly and the second switch assembly are arranged along the length direction of the handle, so that a relatively large space is saved for the handle by utilizing the vertical design along the length direction, and the handle has enough space for placing the circuit assembly and can be arranged at the position opposite to the switch mechanism.

Drawings

Figure 1 is a perspective view of a prior art hair dryer.

Figure 2 is a perspective view of a hair dryer of the present invention.

Figure 3 is a cross-sectional view of a blower of the present invention.

FIG. 4 is a perspective view of a fairing assembly of the invention.

Fig. 5 is a bottom view of the housing of the present invention.

FIG. 6 is a schematic view of the first lever body of the switch operating lever moving the first slider to the first position;

fig. 7 is a perspective view showing a switch operating lever of the present invention.

Fig. 8 is a perspective view showing the switch lever of the present invention viewed from another angle.

Fig. 9 is a schematic view of the first lever main body of the switch operating lever driving the first slider to move to the second position.

Description of the reference numerals

1, a shell; 11 air inlet; 2, a fairing wing assembly; 21 a motor; 22 blades; 23, a rectification outer cover; 231 connecting columns; 3 a heater assembly; 31 a heating element; 32 heating the housing; 4, air outlet; 5, a handle; 6, radiating holes; 7 a heat dissipation channel; 8 circuit components; 9 a switch mechanism; 91 switching the operating lever; 911 a first shaft body; 9111 a first concave portion; 912 a second lever body; 9121 a second concave portion; 913 a first connection; 9131 a first body portion; 9132 a first opening portion; 914 a second connecting part; 9141 second body part; 9142 a second opening part; 915 a first fixing part; 916 a second fixed part; 917 a pressing portion; 92 a dual switch assembly; 921 a first switch assembly; 9211 a first groove; 9212 a second groove; 922 a second switching assembly; 9221 a second groove; 9222 a second slide; 10, a main air duct; a direction of intake airflow; b, radiating the airflow direction; c, the airflow direction of the main air duct; d, the length direction; e the width direction.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 2 to 4, the hair dryer of the present embodiment includes a housing 1 having an air inlet 11, a handle 5 connected to the housing 1, and a heater assembly 3 provided in the housing 1, wherein the heater assembly 3 includes a heating element 31, an air outlet 4 is provided between the air inlet 11 and the heating element 31, and the air outlet 4 guides a part of an air flow entering the housing 1 from the air inlet 11 to the handle 5.

More specifically, the hair dryer further includes a rectification wing assembly 2 disposed in the housing 1, the rectification wing assembly 2 including a motor 21 and a blade 22, a heating element 31 disposed on the opposite side of the blade 22 across the motor 21, and an air outlet 4 disposed between the blade 22 of the rectification wing assembly 2 and the heating element 31 of the heater assembly 3. It should be noted that the heating element 31 may be disposed on the opposite side of the air inlet 4 through the motor 21, and the present invention is not particularly limited to the matching structure of the motor and the blades, and in this embodiment, the blades 22 and the heating element 31 are disposed on both sides of the motor 21, and in some embodiments, in the case of using a high-speed motor or a brushless motor, the blades may be disposed inside the motor or may be closer to the heating element than the motor.

More specifically, as shown in fig. 4, the fairing assembly 2 further includes a fairing 23 formed to surround the motor 21 and the blades 22 and secured to the housing 1 to provide a fixed support for the motor 21. In the present embodiment, the rectifying cover 23 is connected to the casing of the motor 21 by a plurality of connecting columns 231, and the blades 22 are formed on the side of the motor 21 away from the heating element 31.

As shown in fig. 2 and 5, the heating element 31 is formed as one or more and fixed to a housing of the motor 21, and the heater module 3 further includes a heating cover 32 surrounding the heating element 31. The rectification cover 33 and the heating cover 32 are connected to each other to constitute a substantially closed space through which the outside air is blown out when being introduced.

It should be noted that the structure and shape of the heating element 31 in the present embodiment are not particularly limited, and those skilled in the art will understand that the heating element 31 may be any element capable of generating heat by energization to heat the passing airflow, for example, in some embodiments, the heating element 31 may be a heating sheet or a heating wire, and all of them fall into the protection scope of the present invention.

In the present embodiment, as shown in fig. 3 and 5, the rectification cover 23 is formed with two notches to constitute the outlet 4. In the present embodiment, the two outlets 4 are symmetrically disposed. The two air outlets 4 which are symmetrically arranged can increase the air inlet volume on one hand, so that more air flows enter the handle 5 for heat dissipation; on the other hand, the airflow for heat dissipation can uniformly enter the handle 5 from the air outlets 4 on the two sides, so that the stability of heat dissipation is ensured.

The position of the outlet 4 is not particularly limited in the present invention, and may be applied to the present invention as long as the outlet is provided between the blades 22 of the airfoil assembly 2 and the heating element 31 of the heater assembly 3, for example, in some embodiments, the outlet 4 may be provided on the heating cover 32.

In the present embodiment, the shape of the outlet 4 is illustrated as a rectangle, but other shapes of the outlet 4 are also applicable to the present invention, and in other embodiments of the present invention, the shape of the outlet 4 may also be other shapes, such as a circle.

In addition, in other embodiments of the present invention, more than three air outlets 4 are adopted, the number of the air outlets 4 is related to the required heat dissipation air volume and the size of the air outlet 4, when the size of the air outlet 4 is larger or the required heat dissipation air volume is smaller, the number of the air outlets 4 can be reduced, otherwise, the number of the air outlets 4 can be increased.

The handle 5 is preferably integrally formed with the housing 1 by injection molding, so that the number of mounting processes can be reduced, the thickness of the housing 1 can be uniform by integral molding, and the structural strength and the overall stability of the housing 1 can be improved. A hollow inner space communicating with each other is formed in the housing 1 and the handle 5 for arranging the rectifying wing assembly 2 and the heater assembly 3 as described above, and a circuit assembly and a switching mechanism as described below. The handle 5 is formed with a heat radiation hole 6. Preferably, as shown in fig. 3, a heat radiating hole 6 is provided at the lower end of the handle 5. Specifically, in the present embodiment, the "lower end" refers to an end away from the housing 1. The heat radiation hole 6 may be provided in the range of the lower end, and is not necessarily provided at the edge of the handle 5 closest to the lower side. The form of the heat dissipation hole 6 is not particularly limited, and for example, the heat dissipation hole 6 may be formed by mechanically drilling a hole in the handle 5, and it is preferable to design a mold so that the heat dissipation hole 6 is directly formed during injection molding when the handle 5 is formed by injection molding, thereby avoiding secondary drilling. In the present embodiment, the number of the heat dissipation holes 6 is related to the actual heat dissipation requirement, and is not limited herein, and those skilled in the art can appropriately adjust the number according to the actual requirement. In the present embodiment, the heat dissipation hole 6 is preferably rectangular in shape. It should be noted that in other embodiments of the present invention, other shapes, such as a circle, may be used for the shape of the heat dissipation hole 6, and a simple replacement of the shape of the heat dissipation hole is not beyond the protection scope of the present invention.

The following explains the respective components in the handle 5.

First, the circuit module 8 and the switching mechanism 9 will be described with reference to fig. 2 and 3. As shown in fig. 3, the circuit module 8 is disposed in the handle 5 at a position facing the switch mechanism 9. The term "opposed" as used herein means that the circuit module 8 and the switching mechanism 9 are opposed or in a facing relationship in the longitudinal direction d. In contrast to the conventional technique in which the circuit module 8 is generally disposed in the housing 1, in the present embodiment, the circuit module 8 is disposed in the handle 5, so that the space of the housing 1 is saved, the blower can be miniaturized, and heat can be dissipated through the heat dissipating passage 7 described later. In the present embodiment, the circuit component 8 is a printed circuit board and its components, but the specific embodiment is not particularly limited as long as it can be connected to a power supply to control the blower.

As shown in fig. 6, the switch mechanism of the present invention includes a switch lever 91 and a dual switch assembly 92, and the dual switch assembly 92 includes a first switch assembly 921 and a second switch assembly 922. The switch module as referred to herein is a module that can control the operation of an electric appliance based on an on/off function to function as a switch, and its structure is not limited thereto, and it will be understood by those skilled in the art that the circuit structure thereof may be designed correspondingly according to actual needs, and will not be described in detail herein. Fig. 6 shows a length direction d of the switch mechanism, which coincides with a length direction of the handle of the hair dryer when the switch mechanism is applied to the hair dryer, and a width direction e. As shown in fig. 6 and 7, since the first switch unit 921, the switch lever 91, and the second switch unit 922 are provided in this order along the longitudinal direction d of the switch mechanism, the space occupied by the switch mechanism in the width direction can be significantly saved, and a space for mounting other components, for example, the circuit module 8 can be provided, as compared with the case where the switch mechanism is provided along the lateral direction, which is the width direction of the handle in the related art. It should be noted that, although the switch mechanism is applied to the hair dryer in the present embodiment, the switch mechanism may be applied to all home appliances requiring a compact layout.

Specifically, as shown in fig. 7 and 8, the switch operating lever 91 includes a first lever main body 911, a first connecting portion 913 extending from the first lever main body 911 in the longitudinal direction d, a second lever main body 912, and a second connecting portion 914 extending from the second lever main body in the longitudinal direction d.

More specifically, the first connecting portion 913 includes a first main body portion 9131 and a first opening portion 9132 formed at an end remote from the first lever main body 911, and the second connecting portion 914 includes a second main body portion 9141 and a second opening portion 9142 formed at an end remote from the second lever main body 912.

The first opening portion 9132 is larger in the width direction e than the first main body portion 9131, and the second opening portion 9142 is larger in the width direction e than the second main body portion 9141, thereby avoiding possible interference with each other due to sliding.

The first lever body 911 is provided with a first recessed portion 9111 on a side facing the first switch component 921 and the second switch component 922, the second lever body 912 is provided with a second recessed portion 9121 on a side facing the first switch component 921 and the second switch component 922, and the switch lever 91 further includes a first fixing portion 915 fixed to the first recessed portion 9111 integrally formed with the first connecting portion 913 and a second fixing portion 916 fixed to the second recessed portion 9121 integrally formed with the second connecting portion 914.

Note that the "concave portion" referred to herein is a portion formed by sinking and recessing in a direction away from the first connection portion 913 and the second connection portion 914. The first fixing portion 915 and the second fixing portion 916 may be formed by being recessed and fixed to the first recessed portion 9111 and the second recessed portion 9121, and the shape thereof is not particularly limited.

A pressing portion 917 formed to extend in the width direction e orthogonal to the longitudinal direction d is provided on the other side of the switch lever 91. Preferably, both the first concave portion 9111 and the second concave portion 9121 are formed inside the pressing portion 917. Here, the expression "formed inside the pressing portion 917" means that the first concave portion 9111 and the second concave portion 9121 are formed in a concave manner, and are formed as a part, i.e., an inner portion, of the pressing portion 917, when the pressing portion 917 is pressed, the first concave portion 9111 and the second concave portion 9121 are directly stressed, and the first fixing portion 915 and the second fixing portion 916 connected thereto are also directly subjected to force transmission and can drive the first opening portion 9132 and the second opening portion 9142 to move along with the force transmission, so that secondary force transmission is avoided, and a linkage effect is improved. The switch operating lever 91 can be easily and conveniently used by a user through the pressing part 917, and preferably, the pressing parts 917 are formed in two in the present embodiment, and are respectively provided at a side of the first lever main body 911 away from the first and second switch components 921 and 922 and at a side of the second lever main body 912 away from the first and second switch components 921 and 922, so as to be independently operable.

The switch lever 91 is slidably connected to the first switch block 921 and the second switch block 922. Specifically, a first groove 9211 extending in the longitudinal direction d and a first slider 9212 slidable in the first groove 9211 are provided on the side of the first switch block 921 facing the switch lever 91, and a second groove 9221 extending in the longitudinal direction d and a second slider 9222 slidable in the second groove 9221 are provided on the side of the second switch block 922 facing the switch lever 91.

When assembled, the first opening portion 132 is mounted to the first slider 9212, and the second opening portion 9142 is mounted to the second slider 9222, so that the switch lever 91 is interlocked with the first switch component and the second switch component 922.

The shape or structure of the first opening portion 9132 or the second opening portion 9142 is not particularly limited, and may be formed into any opening shape that can be attached to the first slider 9212 or the second slider 9222. In the present embodiment, a case where both the first opening portion 9132 and the second opening portion 9142 are formed as rectangular hollow frames is exemplified, and specifically, the first slider 9212 and the second slider 9222 are also formed as square block bodies matching the rectangles, so that the first opening portion 9132 and the second opening portion 9142 can be closely fitted to the first slider 9212 and the second slider 9222.

Next, the operation of the switch mechanism of the present embodiment will be described with reference to fig. 6 and 9. Fig. 6 is a schematic view of the first lever main body 911 of the switch operating lever 91 moving the first slider 9212 to the first position P1; fig. 9 is a schematic view of the switch operating lever when the first lever main body 11 moves the first slider 9212 to the second position P2. Since the operation of the second lever body 912 is similar to that of the first lever body 911, a repetitive description of the operation of the second lever body 912 is omitted.

Fig. 6 and 9 show a first position P1 and a second position P2 of the first switch unit 921, and in the present embodiment, the first switch unit 921 is used to control the activation or deactivation of the blower, and when the first slider 9212 is at the first position P1, the blower is in the deactivated state, and when the first slider 9212 is at the second position P2, the blower is in the activated state, and the motor 21 in the housing 1 starts to operate to introduce outside air. The number and functions of the first position P1 and the second position P2 are exemplary, and it is understood by those skilled in the art that the third position P3 may be set according to actual requirements and also fall within the protection scope of the present invention, and the first position P1 and the second position P2 may be set to be related to other controls, such as cold-hot or power, for example, the first position P1 may be set to correspond to a cold-air mode and the second position P2 may be set to correspond to a hot-air mode according to cold-hot relation, or the first position P1 may be set to correspond to a high-power mode and the second position P2 may be set to correspond to a low-power mode according to power. The first switch module 21 may be provided with different pins to connect to the circuit module 8, thereby changing the functions of the first position P1 and the second position P2. These circuit designs are prior art and therefore not described in great detail. The second switch assembly 922 is similar in structure and function to the first switch assembly 921, and the specific functions of the first position P1 and the second position P2 can be set as desired.

As shown in fig. 6, the first opening portion 9132 of the first connecting portion 913 is attached to the first slider 9212, and specifically, when the first slider 9212 is at the first position P1, the blower is in the off state. The "first slider 9212 is at the first position P1" means that the initial position of the first slider 9212 is the first position P1 or moves from the second position P2 to the first position P1 by the first lever main body 911. As shown in fig. 9, when the user pushes the pressing portion 917 upwards, the first lever body 911 is forced to move upwards, so that the first connecting portion 913 is driven to move upwards, and the first opening portion 9132 also drives the first slider 212 to move upwards to stay at the second position P2. The "staying at the second position P2" can be achieved by various methods in the prior art, but is not limited herein, for example, by providing an elastically deformable engaging member, and after the first slider 9212 passes over the engaging member, the engaging member is supported by returning to its original state, and stays at the second position P2. When the first slider 9212 stays at the second position P2, the communication between the first switch assembly 921 and the circuit assembly 8 is triggered and the blower is activated. The triggering method is not particularly limited, and a simple replacement of the triggering method, for example, a method of engaging the first slider 9212 with a contact switch, is not beyond the scope of the present invention.

In the present embodiment, the double switch module 2 is provided and the layout thereof is designed, and specifically, the first switch module 921, the switch lever 91, and the second switch module 922 are provided in order along the longitudinal direction d of the switch mechanism, so that the overall design in the longitudinal direction is utilized to save the lateral space. In addition, in the present embodiment, the specific structure of the switch lever 91 and the structure of the switch assembly engaged therewith are also designed so that the sliding engagement between the switch lever 91 and the double switch assembly 92 is smooth and the work efficiency is improved.

Next, a heat dissipation process of the present invention will be explained based on fig. 3.

In fig. 3, a denotes an intake air flow direction, b denotes a heat radiation air flow direction, and c denotes a main duct air flow direction.

First, the rectification wing assembly 2 includes a motor 21 and blades 22, the motor 21 rotates the blades 22 when operating, and the blades 22 rotate so that external air is drawn into the casing 1 of the blower from the rear end of the blower in the intake airflow direction a. The rear end referred to herein means the left end in fig. 3.

The air entering the housing 1 forms an intake air flow and further flows forward, and most of the air flow continues to flow without changing direction, passes through the heating element 31 of the heater assembly 3, is heated, and is blown out from the front end of the hair dryer along the main air duct 10 for drying hair or clothes. In other embodiments of the invention, the blower is sometimes in a cool air mode, where the heater assembly 3 is not heating and the incoming air stream is directed along the main duct 10 from the front of the blower.

The tip end referred to herein does not refer to a specific mounting direction, and specifically refers to the right end in fig. 3 in the present embodiment. This flow along the main duct 10 is the same as the prior art, and since the rectifying cover 23 and the heating cover 32 are connected to each other to constitute a substantially closed space, the outside air is blown out through the space while being introduced.

Next, a heat radiation path through the outlet 4 will be described.

The outlet 4 is provided between the blades 22 of the fairing assembly 2 and the heating element 31 of the heater assembly 3 so that a portion of the incoming airflow formed by air entering the housing 1 can enter the outlet 4 without being heated by the heater assembly 3. One or more notches are formed in the fairing 23 to define the outlet 4, preferably on a side adjacent the handle 5, to allow airflow through the outlet 4 to flow downwardly. The term "up and down" as used herein means a positional relationship in which the housing 1 is located upward and the handle 5 is located downward.

When the air current through the air outlet 4 flows downwards, the air current can enter a hollow inner space formed in the shell 1 and the handle 5 and communicated with each other, because the heat dissipation hole 6 is positioned at the other end of the handle 5, a heat dissipation channel 7 is formed between the air outlet 4 and the heat dissipation hole 6, the heat dissipation air current enters the heat dissipation channel 7 from the air outlet 4 and flows along the heat dissipation air current, and the heat dissipation air current can absorb the heat of related parts flowing through and carry out good heat dissipation on the heat dissipation air current to flow out of the heat dissipation hole 6. It should be noted that the heat radiation airflow mainly flows along the heat radiation passage 7, but actually flows to other parts of the hollow internal space, for example, a side of the circuit module 8 away from the switch mechanism 9 due to the nature of the gas, and can also radiate heat to the part or other parts.

More specifically, in the present embodiment, the circuit assembly 8 is disposed at a position corresponding to the switch mechanism 9 in the handle 5. The heat generated by the circuit assembly 8 during operation causes the temperature of the circuit assembly 8 to rise rapidly, and if the heat is not dissipated in time, the temperature will rise continuously, the circuit assembly 8 may fail due to overheating, and the reliability of the hair dryer will be reduced. Therefore, it is important to perform heat dissipation processing on the circuit component 8. As described above, in the present embodiment, the double switch module is provided and the layout thereof is designed, and specifically, the first switch module 921, the switch lever 91, and the second switch module 922 are provided in this order in the longitudinal direction of the switch mechanism, so that the lateral space is saved by the overall design in the longitudinal direction, and the space is formed between the circuit module 8 and the switch mechanism 9 to constitute a part of the heat dissipation path 7. When the heat dissipation airflow passes through the heat dissipation channel 7, the circuit assembly 8 is effectively cooled. Therefore, the temperature of the circuit component 8 can be prevented from being too high through the cooling of the heat dissipation channel 7, the service life of the circuit component 8 is prolonged, and the service life of the hair drier is further effectively prolonged.

The heat dissipation airflow passing through the heat dissipation channel 7 absorbs the heat of each component and then flows out of the heat dissipation holes 6, and the heat dissipation action is completed.

Those of skill in the art will appreciate that the specific features of the various embodiments may be adaptively separated or combined. Such splitting or combining of specific features does not cause the technical solutions to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

So far, the technical solutions of the present invention have been described in connection with the embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. A hair dryer comprising a casing having an air inlet, a handle connected to the casing and a heater assembly disposed in the casing, the heater assembly comprising a heating element, characterised in that an air outlet is provided between the air inlet and the heating element, the air outlet directing an air stream entering the casing from the air inlet into the handle.

2. The hair dryer of claim 1, wherein a heat dissipating hole is formed in said handle, and said air outlet communicates with said heat dissipating hole to form a heat dissipating passage through which an air flow passes.

3. The hair dryer of claim 1, wherein a circuit assembly is disposed within said handle, said circuit assembly being disposed in contact with air circulating in said heat dissipation path.

4. The hair dryer of any one of claims 1-3, further comprising a fairing wing assembly disposed between the air inlet and the heater assembly, the fairing wing assembly having a motor, a main air duct disposed on a side of the heater assembly remote from the motor, air drawn through the fairing wing assembly being heated by the heater assembly and exiting the main air duct.

5. The hair dryer of claim 4, wherein said fairing assembly further comprises a fairing housing, said heater assembly further comprising a heating housing, said fairing housing being interconnected with said heating housing, said air outlet being provided in one of said fairing housing and said heating housing.

6. The hair dryer of claim 3, wherein a switch mechanism is disposed within said handle, said switch mechanism being disposed opposite said circuit assembly.

7. The hair dryer of claim 6, wherein said switch mechanism includes a switch lever and a dual switch assembly, said dual switch assembly including a first switch assembly and a second switch assembly disposed in series along a length of said handle.

8. The hair dryer of claim 7, wherein said switch operating lever comprises a first lever body, a second lever body, and a first connecting portion and a second connecting portion extending from said first lever body and said second lever body, respectively, in a length direction of said handle, said first connecting portion and said second connecting portion being connected to said first switch assembly and said second switch assembly, respectively.

9. The hair dryer of claim 2, wherein said heat sink aperture is formed in said handle at an end remote from said housing.

10. The hair dryer according to claim 2 or 9, wherein said air outlet or said heat radiating hole is formed in plurality.

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