Hair dryer

Abstract

The utility model provides a hair drier, and relates to the technical field of household appliances. A blower includes a flow channel housing, a motor, and an impeller. The runner shell comprises a shell body, a motor base and a plurality of flow deflectors. The shell is provided with a cavity, an air inlet and an air outlet, the motor base is arranged in the cavity, and a flow channel is formed between the outer periphery of the motor base and the inner wall of the shell. All the flow deflectors are arranged in the flow channel at intervals in the circumferential direction of the motor base, one side of each flow deflector is connected with the motor base, the other side of each flow deflector is connected with the shell, and a fluid channel is formed in the interval between any two adjacent flow deflectors. The motor is installed on the motor base, and the impeller is installed on an output shaft of the motor and located at one end of the motor base. The ends, close to the impeller, of the flow deflectors are bent corresponding to the rotating direction of the impeller. According to the blower, the problem of large on-way loss of airflow can be solved, so that the hydrodynamic performance of the blower is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, specifically relates to a hair dryer. BACKGROUND

[0002] The flow channel shell of the hair dryer is a structure element that limits the path of airflow, ensures that the airflow can flow along the predetermined path under the action of the impeller, avoids the diffusion and loss of the airflow, and is also the mounting structure of the elements of the hair dryer.

[0003] In the prior art, the motor base of the hair dryer is generally arranged in the flow channel shell through supporting pieces and is connected with the flow channel shell, and the airflow flows through the gaps between the supporting pieces under the action of the impeller. Although the supporting pieces can support and fix the motor base, the structural design of the supporting pieces is unreasonable, and the airflow will have obvious impact loss when flowing through the supporting pieces, which increases the along-path loss of the airflow and affects the fluid dynamics performance of the hair dryer. UTILITY MODEL CONTENTS

[0004] The utility model discloses a hair dryer, which can improve the problem of large along-path loss of airflow and improve the fluid dynamics performance of the hair dryer.

[0005] The embodiment of the utility model can be implemented as follows:

[0006] The application provides a hair dryer, which comprises a flow channel shell, a motor and an impeller.

[0007] The flow channel shell comprises a shell body, a motor base and a plurality of flow guide pieces.

[0008] The shell body is provided with a cavity, an air inlet and an air outlet which communicate with the cavity.

[0009] The motor base is arranged in the cavity, and a flow channel is formed between the outer periphery of the motor base and the inner wall of the shell body.

[0010] All the flow guide pieces are arranged in the flow channel in a circumferential direction of the motor base, one side of the flow guide piece is connected with the motor base, and the other side is connected with the shell body, and a fluid passage is formed between any two adjacent flow guide pieces.

[0011] The motor is mounted on the motor base, the impeller is mounted on the output shaft of the motor, and the impeller is located at one end of the motor base.

[0012] One end of the flow guide piece close to the impeller is curved in correspondence with the rotation direction of the impeller.

[0013] The motor can drive the impeller to rotate to suck external air into the flow channel through the air inlet and send the air out through the fluid passage and the air outlet.

[0014] In an optional embodiment, the impeller is located at the front end of the motor base and corresponds to the air outlet, and the curved direction of the one end of the guide vane close to the impeller is the same as the rotating direction of the impeller.

[0015] In an optional embodiment, the one end of the guide vane close to the impeller is curved towards the clockwise direction.

[0016] The clockwise rotation of the impeller can make the airflow flow from the rear end of the impeller to the front end of the impeller, and then be sent out through the air outlet.

[0017] In an optional embodiment, the surfaces on both sides of the guide vane are spline surfaces, and the one end of the guide vane close to the impeller is the leading edge of the guide vane.

[0018] The value range of the inlet angle of the leading edge is 28° to 32°.

[0019] In an optional embodiment, the one end of the guide vane away from the impeller is the trailing edge of the guide vane.

[0020] The value of the inlet angle of the trailing edge is 0°.

[0021] In an optional embodiment, the shell further comprises a front shell, a middle shell and a rear shell.

[0022] The front shell is installed at the front end of the middle shell, and the rear shell is installed at the rear end of the middle shell.

[0023] The air inlet is arranged on the rear shell, and the air outlet is arranged at the front end of the front shell.

[0024] The front shell, the middle shell and the rear shell enclose the cavity.

[0025] The motor base is arranged in the middle shell, a flow channel is formed between the outer periphery of the motor base and the inner wall of the middle shell, and one side of the guide vane is connected to the middle shell.

[0026] The front shell covers the outer periphery of the impeller.

[0027] In an optional embodiment, the middle shell, the motor base and the guide vane are integrally formed.

[0028] In an optional embodiment, the hair dryer further comprises a support base, a heat insulation sheet and an electric heating wire.

[0029] The support base is arranged in the cavity and located between the motor base and the rear shell, one end of the support base is fixed to the motor base, and the other end is fixed to the rear shell.

[0030] A plurality of said heat insulation sheets are arranged along the circumference of the support seat, and the outer side of the support seat and the outer side of the motor seat and the inner wall of the middle shell form the flow channel;

[0031] The electric heating wire is wound around the outer periphery of the heat insulation sheet;

[0032] The air inlet is arranged in the area corresponding to the flow channel of the rear shell.

[0033] In an optional embodiment, the number of the heat insulation sheets corresponds to the number of the guide vanes, and the heat insulation sheets are arranged one-to-one behind the guide vanes.

[0034] In an optional embodiment, one end of the heat insulation sheet close to the guide vane abuts against the tail end of the guide vane.

[0035] The beneficial effects of the hair dryer provided by the embodiments of the present application include:

[0036] After the airflow passes through the impeller, the airflow is accelerated not only in the axial direction but also in the circumferential direction. In the present application, all the guide vanes are arranged in the flow channel along the circumference of the motor seat, and one side of the guide vane is connected with the motor seat and the other side is connected with the shell, so that the space between any two adjacent guide vanes forms a fluid passage, and the end of the guide vane close to the impeller is arranged to bend in the direction of rotation of the impeller. In this way, the flow direction of the airflow is basically the same as the direction of the guide plate, so that the impact loss generated when the airflow passes through the inner cavity can be reduced, and the development of the flow separation vortex formed in the flow channel can be inhibited, thereby improving the fluid performance of the hair dryer. At the same time, the guide plate also supports and connects the motor seat, so that the motor seat is stably arranged in the flow channel shell. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0038] Figure 1 The structural schematic diagram of the hair dryer provided by the embodiments of the present application;

[0039] Figure 2 The sectional view schematic diagram of the hair dryer provided by the embodiments of the present application;

[0040] Figure 3 The explosion structural schematic diagram of the hair dryer provided by the embodiments of the present application;

[0041] Figure 4 A structure schematic view of the middle shell of the hair dryer is provided in the embodiment of the utility model;

[0042] Figure 5 A partial structure section view schematic view of the hair dryer is provided in the embodiment of the utility model;

[0043] Figure 6 A fluid simulation analysis diagram for the straight plate of the deflector of the existing hair dryer;

[0044] Figure 7 A fluid simulation analysis diagram for the curved deflector of the hair dryer is provided in the embodiment of the utility model.

[0045] Icon: 100 - hair dryer, 110 - flow channel shell, 111 - shell, 112 - motor base, 113 - deflector, 114 - cavity, 115 - air inlet, 116 - air outlet, 117 - flow channel, 119 - fluid passage, 121 - leading edge, 122 - trailing edge, 123 - front shell, 124 - middle shell, 125 - rear shell, 126 - fitting ring groove, 127 - mounting groove, 128 - limiting clamping groove, 130 - motor, 150 - impeller, 151 - hub, 152 - blade, 170 - support seat, 171 - plug-in groove, 190 - heat insulation sheet. DETAILED DESCRIPTION

[0046] The motor base of the hair dryer is generally arranged in the flow channel shell through the support piece and is connected with the flow channel shell, and the airflow flows through the gap of the support piece under the action of the impeller. Although the support piece can realize the support and fixation of the motor base, the structure design of the support piece is unreasonable, and the airflow will have obvious impact loss when flowing through the support piece, so that the along-path loss of the airflow is increased, and the fluid dynamics performance of the hair dryer is affected.

[0047] In view of the above problems, the utility model provides a hair dryer which can improve the problem of large along-path loss of airflow, thereby improving the fluid dynamics performance of the hair dryer.

[0048] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely in combination with the drawings in the embodiment of the utility model below. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0050] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0051] In the description of the utility model, it should be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the utility model product when it is usually placed, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0052] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation description, and cannot be understood as indicating or implying relative importance.

[0053] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0054] The overall structure, working principle and technical effects of the hair dryer provided by the utility model are described in detail below through embodiments and in combination with the drawings.

[0055] Please refer to Figures 1 to 5In the embodiment, the hair dryer 100 comprises a flow channel shell 110, a motor 130 and an impeller 150. The flow channel shell 110 comprises a shell 111, a motor base 112 and a plurality of guide vanes 113. The shell 111 is provided with a cavity 114, an air inlet 115 and an air outlet 116 which communicate with the cavity 114. The motor base 112 is arranged in the cavity 114, and a flow channel 117 is formed between the outer periphery of the motor base 112 and the inner wall of the shell 111. All the guide vanes 113 are arranged in the flow channel 117 along the circumference of the motor base 112, and one side of the guide vanes 113 is connected with the motor base 112 and the other side is connected with the shell 111. The space between any two adjacent guide vanes 113 forms a fluid passage 119. The motor 130 is mounted on the motor base 112, the impeller 150 is mounted on the output shaft of the motor 130, and the impeller 150 is located at one end of the motor base 112. The end of the guide vanes 113 close to the impeller 150 is curved in the direction of rotation of the impeller 150. The motor 130 operates to drive the impeller 150 to rotate to suck external air into the flow channel 117 from the air inlet 115 and send it out from the air outlet 116 through the fluid passage 119.

[0056] The airflow accelerated by the impeller 150 not only has an axial velocity, but also has a large circumferential velocity, so that the airflow flows spirally in the area close to the impeller 150. The existing support plate for supporting the motor base 112 is generally arranged straight, so that the spiral airflow will have a large impact on the support plate, thereby increasing the along-the-way loss of the airflow and affecting the fluid dynamics performance of the hair dryer 100.

[0057] In the embodiment, all the guide vanes 113 are arranged in the flow channel 117 along the circumference of the motor base 112, and one side of the guide vanes 113 is connected with the motor base 112 and the other side is connected with the shell 111, so that the space between any two adjacent guide vanes 113 forms a fluid passage 119, and the end of the guide vanes 113 close to the impeller 150 is curved in the direction of rotation of the impeller 150. In this way, the flow direction of the airflow is basically the same as the direction of the guide vanes, so that the impact loss of the airflow when passing through the inner cavity is reduced, and the guide vanes can also inhibit the development of the flow separation vortex formed in the flow channel 117, thereby improving the fluid performance of the hair dryer 100. At the same time, the guide vanes also support and connect the motor base 112, so that the motor base 112 is stably arranged in the flow channel shell 110.

[0058] Please refer to Figure 6 and 7 , Figure 6 is a fluid simulation analysis diagram of the hair dryer 100 when the guide vanes 113 are straight plates. As can be seen from the diagram, the impact of the airflow on the guide vanes is relatively serious, and the vortex at the outlet position is relatively serious, and Figure 7The fluid simulation analysis diagram of the deflector 113 of the hair dryer 100 provided in the embodiment is shown in FIG. 1. It can be seen from the diagram that the impact of the airflow on the deflector is significantly weakened, and the vortex is also significantly weakened, thereby reducing the along-path resistance of the airflow. Figure 7 It can be seen that the impact of the airflow on the deflector is significantly weakened, and the vortex is also significantly weakened, thereby reducing the along-path resistance of the airflow.

[0059] Please refer to Figures 1 to 5 In the embodiment, the impeller 150 is located at the front end of the motor base 112 and corresponds to the air outlet 116, and the bending direction of the end of the deflector 113 close to the impeller 150 is the same as the rotation direction of the impeller 150.

[0060] In the embodiment, the impeller 150 is located at the front end of the motor base 112 and corresponds to the air outlet 116, and the bending direction of the end of the deflector 113 close to the impeller 150 is the same as the rotation direction of the impeller 150.

[0061] In the embodiment, the end of the deflector 113 close to the impeller 150 is bent in the clockwise direction. The clockwise rotation of the impeller 150 can make the airflow flow from the rear end of the impeller 150 to the front end of the impeller 150, and then be sent out from the air outlet 116.

[0062] In the embodiment, the impeller 150 is located at the front end of the motor base 112 and corresponds to the air outlet 116, and the bending direction of the end of the deflector 113 close to the impeller 150 is the same as the rotation direction of the impeller 150.

[0063] Of course, in other embodiments of the present application, the impeller 150 can also be arranged at the rear end of the motor base 112. When the impeller is arranged at the rear end of the motor base 112, the rear end of the deflector 113 is bent in the rotation direction of the impeller 150.

[0064] Please refer to Figures 1 to 5 Further, the surfaces on both sides of the deflector 113 are spline surfaces, and the end of the deflector 113 close to the impeller 150 is the leading edge 121 of the deflector 113. The inlet angle of the leading edge 121 is in the range of 28° to 32°.

[0065] In the embodiment, the inlet angle of the leading edge 121 of the deflector 113 is set in the range of 28° to 32°, which can further improve the along-path loss problem.

[0066] Further, the end of the deflector 113 away from the impeller 150 is the trailing edge 122 of the deflector 113, and the inlet angle of the trailing edge 122 is 0°. Setting the inlet angle of the trailing edge 122 to 0° can further improve the along-path loss problem.

[0067] Further, the front edge 121 line of the front edge 121 of the guide vane 113 is arranged along the radial direction of the impeller 150, and the tail edge 122 line of the tail edge 122 of the guide vane 113 is also arranged along the radial direction of the impeller 150.

[0068] Please refer to Figures 1 to 5 Further, the shell 111 further comprises a front shell 123, a middle shell 124 and a rear shell 125. The front shell 123 is mounted at the front end of the middle shell 124, and the rear shell 125 is mounted at the rear end of the middle shell 124. The air inlet 115 is arranged on the rear shell 125, and the air outlet 116 is arranged at the front end of the front shell 123. The front shell 123, the middle shell 124 and the rear shell 125 form the cavity 114. The motor base 112 is arranged in the middle shell 124, and the flow channel 117 is formed between the outer periphery of the motor base 112 and the inner wall of the middle shell 124. One side of the guide vane 113 is connected to the middle shell 124. The front shell 123 covers the outer periphery of the impeller 150.

[0069] In the embodiment, the middle shell 124, the motor base 112 and the guide vane 113 are integrally formed. The integral forming facilitates the assembly.

[0070] Please refer to Figures 1 to 5 In the embodiment, the middle shell 124, the motor base 112 and the guide vane 113 are integrally formed. The integral forming facilitates the assembly.

[0071] Specifically, the two ends of the middle shell 124 are connected to the front shell 123 and the rear shell 125 respectively by buckling.

[0072] In the embodiment, the hair dryer 100 further comprises a support base 170, heat insulation sheets 190 and an electric heating wire (not shown in the figure). The support base 170 is arranged in the cavity 114 and located between the motor base 112 and the rear shell 125. One end of the support base 170 is fixed to the motor base 112, and the other end is fixed to the rear shell 125. A plurality of heat insulation sheets 190 are arranged on the support base 170 along the circumferential direction of the support base 170. The outer side of the support base 170 and the outer side of the motor base 112 and the inner wall of the middle shell 124 form the flow channel 117. The electric heating wire is wound around the outer periphery of the heat insulation sheet 190. The air inlet 115 is arranged in the region corresponding to the flow channel 117 of the rear shell 125.

[0073] In the embodiment, the support base 170 is arranged between the motor base 112 and the rear shell 125, so that the support base 170 can be fixed by the connection of the two ends. The electric heating wire is arranged to heat the airflow.

[0074] Please refer to Figures 1 to 5Specifically, the rear end of the motor seat 112 is provided with a fitting groove 126, and the front end of the support seat 170 is fitted in the fitting groove and connected through buckling. The rear end of the motor seat 112 is recessed with a mounting groove 127, and the motor 130 is mounted in the mounting groove 127, and the output shaft of the motor 130 extends to the front end of the motor seat 112 through the mounting groove 127. The inner side of the rear shell 125 is provided with an annular limiting clamping groove 128, and the rear end of the support seat 170 is clamped in the limiting clamping groove 128. The support seat 170 is a hollow structure. The support member is enclosed outside the motor 130.

[0075] The two ends of the support seat 170 are fitted with the motor seat 112 and the rear shell 125 respectively in the embodiment, so that the connection between the two can improve the air flow. Enclosing the motor 130 inside the support seat 170 and the motor seat 112 can also avoid the influence of the motor 130 on the air flow.

[0076] Please refer to Figures 1 to 5 In the embodiment, the number of heat insulation sheets 190 corresponds to the number of guide vanes 113, and the heat insulation sheets 190 are arranged one-to-one behind the guide vanes 113. In this way, the influence of the heat insulation sheets 190 on the air flow can be avoided, so that the along-path resistance of the air flow can be further reduced, and the fluid dynamics performance of the hair dryer 100 can be improved.

[0077] Specifically, one end of the heat insulation sheet 190 close to the guide vane 113 abuts against the tail end of the guide vane 113. This arrangement can improve the problem of large along-path resistance of the air flow.

[0078] In the embodiment, the heat insulation sheet 190 is a mica sheet. The outer side is provided with a sawtooth-shaped groove to fix the electric heating wire.

[0079] Further, the outer side of both ends of the heat insulation sheet 190 is provided with a chamfer, and the middle part is provided with a hollow hole. The chamfer and the hollow hole can further improve the problem of large along-path resistance of the air flow.

[0080] Specifically, the number of guide vanes 113 and heat insulation sheets 190 is 10. The support frame is provided with ten insertion grooves 171 in the circumferential direction. The heat insulation sheets 190 are inserted one-to-one in the insertion grooves 171.

[0081] Please refer to Figures 1 to 5 In the embodiment, the impeller 150 includes a hub 151 and a plurality of blades 152, and the plurality of blades 152 are uniformly arranged on the front side of the hub 151 along the circumferential direction of the hub 151. The shape of the blade 152 is a three-dimensional twisted shape.

[0082] In summary, by arranging all the guide vanes 113 in the flow channel 117 along the circumference of the motor base 112, and connecting one side of the guide vanes 113 with the motor base 112 and the other side with the shell 111, the space between any two adjacent guide vanes 113 forms a fluid passage 119, and the end of the guide vanes 113 close to the impeller 150 is arranged to be curved in the direction of rotation of the impeller 150, so that the flow direction of the air flow is basically the same as the direction of the guide vanes, which can reduce the impact loss generated when the air flow passes through the inner cavity, the guide vanes can also inhibit the development of the flow separation vortex formed in the flow channel 117, thereby improving the fluid performance of the hair dryer 100. At the same time, the guide vanes also support and connect the motor base 112, so that the motor base 112 is stably arranged in the flow channel shell 110.

[0083] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A hair dryer characterized by, The flow channel shell (110), the motor (130) and the impeller (150); The flow channel shell (110) comprises a shell (111), a motor base (112) and a plurality of guide vanes (113); The shell (111) is provided with a cavity (114), an air inlet (115) and an air outlet (116) which communicate with the cavity (114); The motor base (112) is arranged in the cavity (114), and a flow channel (117) is formed between the outer periphery of the motor base (112) and the inner wall of the shell (111); All the guide vanes (113) are arranged in the flow channel (117) along the circumference of the motor base (112) and are connected to the motor base (112) on one side and to the shell (111) on the other side, and the interval between any two adjacent guide vanes (113) forms a fluid passage (119); The motor (130) is mounted on the motor base (112), the impeller (150) is mounted on the output shaft of the motor (130), and the impeller (150) is located at one end of the motor base (112); The end of the guide vane (113) close to the impeller (150) is curved in the direction corresponding to the rotation direction of the impeller (150); The operation of the motor (130) can drive the impeller (150) to rotate to suck external air into the flow channel (117) from the air inlet (115) and send it out from the air outlet (116) through the fluid passage (119).

2. The hair dryer of claim 1, wherein The impeller (150) is located at the front end of the motor base (112) and corresponds to the air outlet (116), and the bending direction of the end of the guide vane (113) close to the impeller (150) is the same as the rotation direction of the impeller (150).

3. The hair dryer of claim 2, wherein, The end of the guide vane (113) close to the impeller (150) is curved in the clockwise direction; The clockwise rotation of the impeller (150) can make the airflow flow from the rear end of the impeller (150) to the front end of the impeller (150) and then be sent out from the air outlet (116).

4. The hair dryer of claim 3, wherein The surfaces on both sides of the guide vane (113) are spline surfaces, and the end of the guide vane (113) close to the impeller (150) is the leading edge (121) of the guide vane (113); The value of the inlet angle of the leading edge (121) ranges from 28° to 32°.

5. The hair dryer of claim 4, wherein, The end of the guide vane (113) away from the impeller (150) is the trailing edge (122) of the guide vane (113), The value of the inlet angle of the trailing edge (122) is 0°.

6. The hair dryer according to any one of claims 1 to 4, characterized in that The shell (111) further comprises a front shell (123), a middle shell (124) and a rear shell (125); The front shell (123) is mounted on the front end of the middle shell (124), and the rear shell (125) is mounted on the rear end of the middle shell (124); The air inlet (115) is arranged on the rear shell (125), and the air outlet (116) is arranged on the front end of the front shell (123); The front shell (123), the middle shell (124) and the rear shell (125) enclose the cavity (114); The motor base (112) is arranged in the middle shell (124), and a flow channel (117) is formed between the outer periphery of the motor base (112) and the inner wall of the middle shell (124) shell. The front shell (123) covers the outer periphery of the impeller (150).

7. The hair dryer of claim 6, wherein The middle shell (124), the motor base (112) and the flow guide vane (113) are integrally formed.

8. The hair dryer of claim 6, wherein, The hair dryer further comprises a support seat (170), a heat insulation sheet (190) and an electric heating wire; The support seat (170) is arranged in the cavity (114) and located between the motor base (112) and the rear shell (125), one end of the support seat (170) is fixed with the motor base (112), and the other end is fixed with the rear shell (125); A plurality of heat insulation sheets (190) are arranged on the support seat (170) in a circumferential direction, and the flow channel (117) is formed between the outer side of the support seat (170) and the inner wall of the middle shell (124) and the outer side of the motor base (112). The electric heating wire is wound around the outer periphery of the heat insulation sheet (190). The air inlet (115) is arranged in the region corresponding to the flow channel (117) of the rear shell (125).

9. The hair dryer of claim 8, wherein, The number of heat insulation sheets (190) corresponds to the number of flow guide vanes (113), and the heat insulation sheets (190) are arranged one by one behind the flow guide vanes (113).

10. The hair dryer of claim 9, wherein, The end of the heat insulation sheet (190) close to the flow guide vane (113) abuts against the tail end of the flow guide vane (113).

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