Small-sized electric hair drier with double air ducts

Abstract

The utility model discloses a small-sized electric hair drier with double air ducts, which comprises a shell and a fan fixedly arranged in the shell, the shell comprises a first shell, and the fan is arranged in the first shell; the shell is provided with a first air duct and a second air duct which are communicated with each other; the first air duct penetrates through the fan from an air inlet of the fan; the second air duct comprises a first gap formed between the draught fan and the first shell, and the first gap communicates with an air inlet of the draught fan. The shell is internally provided with the first air channel and the second air channel which are communicated with each other, the second air channel comprises the first gap formed between the fan and the first shell, so that the two air channels are provided for air supply in the operation process of the electric hair drier, fluid passes through the outer edge of the fan for synchronous heat dissipation in the air supply process, and the heat dissipation performance of the fan is better.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hair dryer, specifically relates to a small -size double air duct electric hair dryer. BACKGROUND

[0002] Hair dryer is a kind of fluid that is driven by motor and is output, it is often used in daily hair drying scene;Wherein hair dryer includes shell, fan set in the shell, the air of outside is inhaled by the rotation of fan, and is output under the condition of being limited path by air outlet;In prior art, the phenomenon of motor heating exists in the operation process of hair dryer, but the current fluid output mode through the center of fan cannot better heat dissipation of fan, therefore it is necessary to develop a small -size double air duct electric hair dryer. UTILITY MODEL CONTENTS

[0003] The utility model discloses a small -size double air duct electric hair dryer to solve the above -mentioned technical problem, the first air duct of intercommunication is arranged in the shell, and the second air duct includes the first gap arranged between the fan and the first shell, so that the electric hair dryer operation process has two air ducts to send air, and the fluid is synchronously heat dissipated through the outer edge of fan in the air sending process, so that the heat dissipation of fan is better.

[0004] To realize the above-mentioned utility model purposes, the technical scheme adopted by the utility model is as follows:

[0005] A small -size double air duct electric hair dryer, including shell, the fan fixedly arranged in the shell, the shell includes the first shell, and the fan is arranged in the first shell;The first air duct and the second air duct of intercommunication are arranged in the shell;

[0006] The first air duct is arranged from the fan inlet to the fan;The second air duct includes the first gap arranged between the fan and the first shell, and the first gap is connected with the fan inlet.The first air duct and the second air duct of intercommunication are arranged in the shell, and the second air duct includes the first gap arranged between the fan and the first shell, so that the electric hair dryer operation process has two air ducts to send air, and the fluid is synchronously heat dissipated through the outer edge of fan in the air sending process, so that the heat dissipation of fan is better.

[0007] Preferably, the fan includes the fan body, and the connecting shell is sleeved on the periphery of the fan body, the first gap is arranged between the connecting shell and the first shell.The first gap is horizontally arranged.The connecting shell is sleeved on the periphery of the fan body and is fixed in the first shell, so that the fixing stability of the fan body is stronger, and the problem of overall rotation of the fan in the operation process is avoided, the first gap between the connecting shell and the first shell provides the space for the flow of the second air duct, and the fan body is heat exchanged in the process of fluid flow, so that the fan is heat dissipated, and the heat dissipation performance of the fan is good.

[0008] Preferably, the connecting shell is coaxially arranged in the first shell, and one or more flow-through grooves are arranged through the connecting shell and communicate with the first gap. During the flow of the fluid in the first gap, the fluid can flow into the flow-through grooves and contact the fan body due to the through arrangement of the flow-through grooves, so as to heat exchange the fan body and improve the heat exchange effect of the fan. Meanwhile, the flow direction of the fluid is guided by the flow-through grooves.

[0009] Preferably, a fourth gap is arranged between the fan body and the connecting shell, and the fourth gap communicates with the flow-through grooves and the first gap. The fourth gap is arranged to make more fluid flow from the flow-through grooves to the space between the fan body and the connecting shell, so as to improve the heat exchange effect of the fan.

[0010] Preferably, one or more abutting points are arranged on the outer periphery of the fan body and abut against the inner surface of the connecting shell, and the abutting points are arranged in the fourth gap. The abutting points provide a fulcrum for the fourth gap between the connecting shell and the fan body, and fix the fan body in the connecting shell, so as to prevent the fan body from rotating in the connecting shell.

[0011] Preferably, the abutting points are semispherical.

[0012] Preferably, an abutting block is arranged at one end of the connecting shell, and an abutting end of the fan body is arranged at the air inlet and abuts against the abutting block to limit the position. The fan is prevented from being separated from the end of the connecting shell and moving to the outside.

[0013] Preferably, a first air inlet module is connected to one end of the connecting shell close to the air inlet of the fan, the first air inlet module is partially embedded in the first shell, the first air inlet module is coaxially arranged with the fan, and the first air inlet module communicates with the air inlet of the fan and the first gap. The first air inlet module is embedded in the first shell to provide an air inlet module for the first air duct, and the output end of the first air inlet module communicates with the output end of the first gap.

[0014] Preferably, the first air inlet module comprises a first air inlet block and a first connecting block coaxially embedded and fixed with the first air inlet block, and the first connecting block is coaxially buckled to one end of the outer periphery of the connecting shell close to the air inlet of the fan. The air inlet block is fixed by the first connecting block, and the first connecting block is connected to the outer periphery of the connecting shell by buckling. This assembly method is simple and reduces the production difficulty.

[0015] Preferably, the connecting shell is provided with a first protrusion at the snap connection with the first adapter block, the first protrusion abutting the axial inner surface of the first adapter block, and the first protrusion is provided with a communication groove on both sides in communication with the fan air inlet and the first gap. The second air duct can flow through the first gap and the communication groove to the air supply end of the first air supply module, thereby converging with the first air duct and flowing into the fan.

[0016] Preferably, the first air inlet block, the first adapter block, and the first gap are in communication with each other. In the first air duct, the fluid from the outside enters the fan air inlet after passing through the first air inlet block and the first adapter block; in the second air duct, the fluid flows through the first gap to the air supply end of the first adapter block and enters the fan air inlet.

[0017] Preferably, the air inlet end of the first shell is provided with a second protrusion, and the inner surface of the first adapter block is provided with a first fitting groove fitted with the second protrusion. The first shell limits the first adapter block in the circumferential direction, thereby fixing the fan connected to the first adapter block and preventing the fan from rotating as a whole.

[0018] Preferably, the first adapter block is provided with a second fitting groove at the snap connection with the connecting shell, and the first protrusion is fitted in the second fitting groove. This prevents the connecting shell from rotating relative to the first shell and the first adapter block, thereby improving the stability of the fan operation.

[0019] Preferably, the first air inlet block is provided with a plurality of first air inlet holes. The first air inlet holes are in communication with the fan air inlet and the first gap and the communication groove, and the first air duct is arranged in the order of the first air inlet hole, the fan air inlet, and the fan air outlet. The plurality of first air inlet holes allows the fluid from the outside to flow through the first air inlet hole to the fan air inlet.

[0020] Preferably, the first air inlet hole is coaxially arranged around the first air inlet block axis. This allows for a larger air supply.

[0021] Preferably, the diameter of the first air inlet hole gradually increases along the radial direction of the first air inlet block axis. The different diameters allow the amount of fluid entering from the radial direction to remain constant at each location.

[0022] Preferably, the first air inlet hole is a circular hole. The circular hole facilitates air intake.

[0023] Preferably, the shell further comprises a handle mounting structure vertically arranged below the first shell and connected therewith; the second air duct further comprises a first flow passage connected with the first gap, and the first flow passage is arranged along the arrangement direction of the handle mounting structure. The first flow passage is arranged in the handle mounting structure, so that the second air duct can enter from the handle mounting structure, then pass through the first flow passage to the first gap, and finally combine with the first air duct to enter the fan, thereby forming a double-air-duct air inlet operation mode.

[0024] Preferably, a sealing ring is arranged on the outer periphery of the connecting shell, the outer periphery of the sealing ring abuts against the inner surface of the first shell, and the first shell, the sealing ring and the connecting shell are arranged in sequence from outside to inside. The sealing ring is arranged on the outer periphery of the connecting shell, and abuts against the inner surface of the first shell, so as to avoid the problem of movement of the connecting shell during operation of the fan; at the same time, the sealing ring is arranged opposite the fan outlet, so as to avoid the problem of cross flow and improve the operation stability of the electric hair dryer.

[0025] Preferably, the sealing ring is arranged at an end away from the fan air inlet. The sealing ring is arranged at an end close to the fan air outlet.

[0026] Preferably, the connecting shell is provided with a connecting groove embedded with the sealing ring. The connection position of the sealing ring is more stable, and the problems of shaking and displacement of the sealing ring are avoided.

[0027] Preferably, the sealing ring is arranged at a position overlapping the first flow passage in vertical projection. The vertical air inlet of the first flow passage is directly arranged at the fan outlet, so as to avoid the problem of cross flow.

[0028] Preferably, in vertical projection, the fan and the first flow passage partially overlap. When the fluid enters through the first flow passage, it can directly enter the first gap, complete heat exchange of the fan, and be transmitted to the first air duct for confluence.

[0029] Preferably, the handle mounting structure is provided with a switch module on one side of the first flow passage. The operation mode of the fan is controlled conveniently.

[0030] Preferably, in vertical projection, the switch module and the first gap do not overlap each other. Only the first flow passage arranged in the handle mounting structure vertically corresponds to the first gap, and the handle mounting structure is arranged in a partitioned manner, so as to avoid affecting the air supply effect of the first flow passage.

[0031] Preferably, the switch module comprises a first frame body arranged in the handle mounting structure and connected with the first shell, a switch button arranged in the first frame body and extending to the outside, the switch button, the first frame body and the first flow channel are arranged in sequence. In the vertical projection, the first frame body and the first gap do not overlap with each other; only the first flow channel is arranged in the vertical direction corresponding to the first gap in the handle mounting structure, and the arrangement is partitioned to avoid affecting the air supply effect of the first flow channel.

[0032] Preferably, the circuit board is fixedly arranged in the first flow channel. The circuit board is cooled and cooled during the fluid conveying process in the first flow channel.

[0033] Preferably, the circuit board is arranged along the arrangement direction of the first flow channel. It is convenient to cool the circuit board during the fluid flow process.

[0034] Preferably, the circuit board is provided with a heat conduction plate in contact with the airflow of the first flow channel. The heat conduction plate is provided, wherein the heat conduction plate is a copper sheet, so that the fluid flows in contact with the copper sheet during the process to exchange heat and improve the heat exchange efficiency.

[0035] Preferably, the heat conduction plate comprises a connecting end connected with the circuit board, and a fitting end connected with the connecting end, and the fitting end is respectively opposite to the components of the circuit board and the airflow of the second flow channel. The cross section of the heat conduction plate along the airflow conveying direction is "H" shape, which is convenient for fitting the components of the circuit board to improve the heat exchange effect.

[0036] Preferably, the circuit board is connected with a cable, and the cable penetrates through the first flow channel and penetrates through the first shell from the end of the first gap away from the air inlet of the fan. It is arranged in the opposite direction to avoid affecting the airflow flowing from the first flow channel to the first gap,

[0037] Preferably, the connecting shell is provided with a penetration opening for the cable to penetrate through the space. The penetration opening is arranged on the side of the sealing ring away from the first gap, so as to avoid the problem of air leakage when the airflow vertically opposite to the first flow channel from the air outlet of the fan. The connection line at the end of the first flow channel has a certain inclination. Even if part of the airflow flows out through the penetration opening, it is far away from the air outlet of the fan, so as to avoid the problem of air leakage. At the same time, the cable penetrates through the penetration opening to fill the space, which can effectively reduce the amount of airflow.

[0038] Preferably, in the vertical projection, the cable penetrating through the first shell, the sealing ring and the first gap do not overlap with each other. The cable penetrating through the first shell, the sealing ring and the first gap are arranged in sequence. The first flow channel conveying fluid directly blows out from the air outlet of the fan,

[0039] Preferably, the cable is arranged on one side of the first frame.

[0040] Preferably, the handle mounting structure comprises an outer shell and an inner shell, the switch module is fixedly connected to the inner shell, the first flow passage is arranged inside the inner shell and on one side of the switch module, and the upper end of the outer shell abuts against the first shell. The first flow passage and the circuit board are arranged inside the inner shell. The switch button penetrates through the outer shell and extends to the outside, which can effectively prevent the outer shell from rotating circumferentially. The handle mounting structure is connected by multiple modules, and the outer shell is sleeved on the inner shell, which facilitates assembly during production.

[0041] Preferably, the inner shell and the outer shell are provided with a clamping portion at the end away from the first shell to prevent the outer shell from rotating. The clamping portion can effectively connect and fix the inner shell and the outer shell, prevent the outer shell from coming off in the axial direction, and prevent the outer shell from rotating circumferentially.

[0042] Preferably, the clamping portion comprises a first connecting module fixedly connected to the inner shell and limiting the outer shell circumferentially. The first connecting module is arranged to connect the inner shell and the outer shell to prevent them from separating.

[0043] Preferably, the first connecting module comprises a first connecting block fixedly connected to the inner shell and a first limiting groove arranged on the upper end of the first connecting block.

[0044] A first limiting strip is arranged on the inner surface of the outer shell and embedded in the first limiting groove. The first connecting block is fixedly connected to the inner shell by a screw. After the first connecting block is fixedly connected to the inner shell, the first limiting groove and the first limiting strip are embedded to prevent the outer shell from rotating. Since the first limiting strip and the first limiting groove intersect in the vertical projection direction, the bottom of the first limiting groove blocks the axial movement of the first limiting strip, thereby preventing the outer shell from rotating circumferentially and moving axially.

[0045] Preferably, the first limiting groove and the first limiting strip are arranged in one or multiple groups. The first limiting groove and the first limiting strip are arranged in one group or multiple groups around the first connecting block as the center. Multiple groups are arranged to improve the stability of the limiting.

[0046] Preferably, the first connecting block is coaxially arranged with a first embedding hole and a first embedding groove from inside to outside in sequence, and the first limiting groove is arranged on the outer periphery of the first embedding groove.

[0047] The inner shell is provided with a first embedding portion embedded in the first embedding hole and a second embedding portion embedded in the first embedding groove. Multiple embedding positions are provided to improve the connection stability of the inner shell and the first connecting block, and to prevent the two from shaking after connection and affecting the connection stability of the outer shell.

[0048] Preferably, the clamping part further comprises a second connecting block and / or a third connecting block connected with the first connecting block. The clamping part has stronger connection stability with the outer shell.

[0049] Preferably, the first connecting module further comprises a first buckle and / or a second buckle fixedly arranged at the lower end of the first connecting block and connected with the second connecting block and the third connecting block. The arrangement of the second connecting block and the third connecting block forms the effect of layer-by-layer arrangement of the outer shell, the third connecting block and the second connecting block, and the multiple layers are fitted around each other, thereby improving the connection stability.

[0050] Preferably, the third connecting block is fixedly arranged between the first connecting block and the second connecting block. The arrangement of the second connecting block and the third connecting block forms the effect of layer-by-layer arrangement of the outer shell, the third connecting block and the second connecting block, and the multiple layers are fitted around each other, thereby improving the connection stability.

[0051] Preferably, the first buckle and the second buckle are arranged radially one or more in sequence with the first connecting block as the center. The arrangement of multiple buckles is conducive to improving the connection stability.

[0052] Preferably, the second connecting block is provided with a first buckle connecting hole connected with the first buckle; and the third connecting block is provided with a second buckle connecting hole connected with the second buckle. The first buckle connecting hole and the first buckle are arranged in groups in correspondence, and one or more groups are arranged; the second buckle connecting hole and the second buckle are arranged in groups in correspondence, and one or more groups are arranged; the connection is achieved by means of buckling, which is convenient for assembly, and after connection, it is conducive to abutting against the axial direction of the outer shell, thereby improving the stability of the connection effect.

[0053] Preferably, the second connecting block is provided with a second fitting groove fitted with the second buckle, and the vertical projection of the second fitting groove and the first buckle connecting hole does not overlap. The connection is achieved by means of buckling, which is convenient for assembly, and after connection, it is conducive to abutting against the axial direction of the outer shell, thereby improving the stability of the connection effect.

[0054] Preferably, the second connecting block is provided with one or more second air inlet holes in communication with the first flow passage. The arrangement of the second air inlet hole enables the fluid to flow from the second connecting block to the first flow passage, thereby forming the effect of vertical fluid flow.

[0055] Preferably, the second air inlet hole is coaxially arranged in multiple turns around the second block center. The arrangement of the second air inlet hole improves the air delivery capacity.

[0056] Preferably, the inner shell is provided with a communication port in communication with the first flow passage and the second air inlet hole. The external airflow flows through the second air inlet hole, the communication port and the first flow passage.

[0057] The first chimeric part is communicated with the outside through the first connecting block, the second connecting block and the third connecting block, so that the external power supply of the circuit board is connected;

[0058] Preferably, the heating module, the connecting shell and the first shell are sequentially arranged in the first shell in a manner of abutting against each other to be fixed in position, and the outer surface of the connecting shell abuts against the inner surface of the first shell. The multiple components are assembled in the abutting manner, facilitating assembly, and are connected in the abutting manner after assembly, so that the structure is compact and the stability of the device connection is improved.

[0059] Preferably, the first shell is provided with a first abutting table at the end thereof, the heating module comprises a heating body and a sleeve shell fixedly arranged at the periphery of the heating body, one end of the sleeve shell abuts against the first abutting table, and the other end of the sleeve shell abuts against the connecting shell. The abutting table and the sleeve shell abut against each other, so that the heating module is prevented from being taken out of the first shell as a whole, and the heating module is abutted at the end to limit the abutting of the whole.

[0060] Preferably, the inner surface of the sleeve shell is provided with a first chimeric strip, and the heating body is provided with a first chimeric port at the end thereof in the direction of the airflow.

[0061] The other end of the heating body away from the first chimeric port abuts against the end of the connecting shell. The heating body is connected by being chimeric with the first chimeric strip through the first chimeric port, the two are assembled in a simple manner, and after assembly, the connecting shell abuts against one end of the heating body and the sleeve shell on the same side to abut against multiple positions, so that the assembly is completed, the connection stability is improved, and the problem of structure shaking during use is avoided.

[0062] Preferably, the sleeve shell is provided with a plurality of ventilation holes at the end thereof in the direction of the airflow, and the first air duct is arranged through the first air inlet, the fan, the heating body and the ventilation holes. The first air duct is horizontally arranged in the first shell and enters from the first air inlet and is output from the ventilation hole.

[0063] Preferably, the outer surface of the connecting shell is provided with an abutting part abutting against the inner surface of the first shell. The connecting shell is coaxially limited in the first shell. After the abutting part abuts against the inner surface of the first shell, the connecting shell at the initial end is limited in the first shell. After the other end of the connecting shell abuts against the heating module and is limited by the end of the heating module, the assembly of the components in the first shell is completed. The assembly is limited and connected in the abutting manner, so that the structure is compact and the installation stability is high.

[0064] The application has the beneficial technical effects:

[0065] The present invention has a first air duct and a second air duct connected inside the housing. The second air duct includes a first gap between the fan and the first housing, so that the hair dryer can have two air ducts for air supply during operation. During the air supply, the fluid is simultaneously cooled by passing through the outer edge of the fan, which improves the heat dissipation of the fan. Attached Figure Description

[0066] Figure 1 The diagram shown is a structural schematic of this utility model;

[0067] Figure 2 The diagram shown is another schematic representation of the structure of this utility model;

[0068] Figure 3 As shown Figure 2 A schematic diagram of the AA-direction cross-section structure;

[0069] Figure 4 As shown Figure 2 Schematic diagram of the DD-direction cross-section structure;

[0070] Figure 5 As shown Figure 2 A schematic diagram of the EE cross-sectional structure;

[0071] Figure 6 As shown Figure 1 Schematic diagram of the CC-direction cross-section structure;

[0072] Figure 7 The image shown is one of the exploded structural diagrams of this utility model;

[0073] Figure 8 The second diagram shows the exploded structure of this utility model;

[0074] Figure 9 The third diagram shows the exploded structure of this utility model;

[0075] Figure 10 The fourth diagram shows the exploded structure of this utility model;

[0076] Figure 11 The fifth diagram shows the exploded structure of this utility model;

[0077] Figure 12 As shown Figure 3 One of the magnified schematic diagrams of the local structure;

[0078] Figure 13 As shown Figure 3 The second enlarged schematic diagram of the structure;

[0079] Figure 14 As shownFigure 1 A partial schematic diagram of the GG-direction cross-sectional structure. Detailed Implementation

[0080] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0081] The technical solution of this utility model will be described in detail below with specific embodiments.

[0082] Reference Figures 1 to 13 A small dual-duct hair dryer includes a housing and a fan 3 fixedly installed inside the housing. The housing includes a first housing 1, and the fan 3 is installed inside the first housing 1. The housing is provided with a first air duct and a second air duct that are connected to each other.

[0083] The first air duct extends through the air inlet of the fan 3 and passes through the fan. The second air duct includes a first gap 30 between the fan 3 and the first housing 1, and the first gap 30 is connected to the air inlet of the fan 3. The housing is provided with the first air duct and the second air duct connected to each other, wherein the second air duct includes the first gap 30 between the fan 3 and the first housing 1, so that the hair dryer can have two air ducts for air supply during operation, and the fluid is simultaneously cooled by passing through the outer edge of the fan during air supply, so that the fan can have better heat dissipation.

[0084] The fan 3 includes a fan body 31 and a connecting shell 32 sleeved around the fan body 31. A first gap 30 is provided between the connecting shell 32 and the first shell 1. The connecting shell 32 is fixedly connected to the first shell 1, wherein the first shell 1 is provided with a first threaded post 118; the connecting shell 32 is provided with a second threaded post 328 coaxially arranged with the first threaded post 118. The first threaded post 118 and the second threaded post 328 are connected by screws, thereby fixing the connecting shell 32 to the first shell 1. The first gap 30 is horizontally arranged. The connecting shell 32 sleeved around the fan body 31 and fixed inside the first shell 1 makes the fan body 31 more stable and avoids the problem of the fan rotating as a whole during operation. The first gap 30 between the connecting shell 32 and the first shell 1 provides space for the second air duct to circulate, allowing heat exchange between the fan body and the fluid during the flow, thereby dissipating heat from the fan and improving its heat dissipation performance.

[0085] The connecting shell 32 is coaxially arranged in the first shell 1, and one or more flow-through grooves 321 are arranged through the connecting shell 32, and the flow-through grooves 321 are in communication with the first gap 30. During the flow of the fluid in the first gap 30, the fluid can flow into the flow-through grooves 321 and contact the outer periphery of the fan body 31 due to the through arrangement of the flow-through grooves 321, so as to heat exchange the fan body 31 and improve the heat exchange effect of the fan. Meanwhile, the flow-through grooves 321 are arranged to guide the flow direction of the fluid.

[0086] The fourth gap 33 is arranged between the fan body 31 and the connecting shell 32, and the fourth gap 33 is in communication with the flow-through grooves 321 and the first gap 30. The fourth gap 33 is arranged to make more fluid flow from the flow-through grooves 321 to the space between the fan body 31 and the connecting shell 32, so as to improve the heat exchange effect of the fan.

[0087] The outer periphery of the fan body 31 is provided with one or more abutting points 311 abutting against the inner surface of the connecting shell 32, and the abutting points 311 are arranged in the fourth gap 33. The abutting points 311 are arranged to provide a fulcrum for the fourth gap 33 arranged between the connecting shell 32 and the fan body 31, and to fix the fan body 31 in the connecting shell 32, so as to avoid the rotation of the fan body 31 in the connecting shell. Preferably, a rubber sleeve is arranged on the outer periphery of the fan body 31, and the abutting points 311 are arranged on the rubber sleeve. The rubber sleeve plays a role of shock absorption and noise reduction.

[0088] The abutting points 311 are semispherical.

[0089] One end of the connecting shell 32 is provided with an abutting block 322, and the fan body 31 is provided with an abutting end 312 abutting against the abutting block 322 at the air inlet to limit the position. The fan is prevented from being separated from the end of the connecting shell 32 to the outside.

[0090] The first air inlet module 4 is connected to one end of the connecting shell 32 close to the air inlet of the fan, the first air inlet module 4 is partially embedded in the first shell 1, the first air inlet module 4 is coaxially arranged with the fan 3, and the first air inlet module 4 is in communication with the air inlet of the fan 3 and the first gap 30. The first air inlet module 4 is embedded in the first shell 1 to provide an air inlet module for the first air duct, and the output end of the first air inlet module is in communication with the output end of the first gap 30.

[0091] The first air inlet module 4 comprises a first air inlet block 41, a first connecting block 42 coaxially embedded and fixed with the first air inlet block 41, and the first connecting block 42 is coaxially buckled and connected to one end of the outer periphery of the connecting shell 32 close to the air inlet of the fan. The first air inlet block 41 is arranged and fixed through the first connecting block 42, and the first connecting block 42 is connected to the outer periphery of the connecting shell 32 through buckling. This assembly method is simple and reduces the production difficulty.

[0092] The connecting shell 32 is provided with a first protrusion 323 at the buckling connection position of the first connecting block 42, the first protrusion 323 abuts against the inner surface of the first connecting block 42 in the axial direction, and the two sides of the first protrusion 323 are provided with a communication groove 324 which is in communication with the air inlet of the fan 3 and the first gap 30. The second air duct can flow through the first gap 30 and the communication groove 324 to the air supply end of the first air supply module, thereby converging with the first air duct and flowing into the fan.

[0093] The first air inlet block 41, the first connecting block 42 and the first gap 30 are in communication with each other. In the first air duct, the fluid from the outside enters the air inlet of the fan after passing through the first air inlet block 41 and the first connecting block 42; in the second air duct, the fluid flows to the air supply end of the first connecting block 42 through the first gap 30 and enters the air inlet of the fan.

[0094] The air inlet end of the first shell 1 is provided with a second protrusion 15, and the inner surface of the first connecting block 42 is provided with a first embedding groove 421 which is embedded with the second protrusion 15. The first shell limits the first connecting block in the circumferential direction, thereby fixing the fan connected with the first connecting block and preventing the rotation of the whole fan;

[0095] The first connecting block 42 is provided with a second embedding groove 422 at the buckling connection position of the connecting shell 32, and the first protrusion 323 is embedded in the second embedding groove 422. This prevents the connecting shell from rotating relative to the first shell and the first connecting block in the circumferential direction, thereby improving the stability of the fan operation.

[0096] The first air inlet block 41 is provided with a plurality of first air inlet holes 411. The first air inlet holes 411 are in communication with the air inlet of the fan 3, the first gap 30 and the communication groove 324, and the first air duct is arranged in the sequence of the first air inlet holes 411, the air inlet of the fan and the air outlet of the fan. The plurality of first air inlet holes 411 allows the fluid from the outside to flow to the air inlet of the fan through the first air inlet holes 411.

[0097] The first air inlet holes 411 are coaxially arranged around the first air inlet block 41 in multiple turns. This makes the air supply larger.

[0098] The first air inlet hole 411 has a gradually increasing diameter along the radial direction of the first air inlet block 41. The different diameters ensure that the amount of fluid entering from the radial direction remains constant at different positions.

[0099] The first air inlet hole 411 is a circular hole. The circular hole facilitates air inlet operation.

[0100] The shell further includes a handle mounting structure 2 vertically arranged below the first shell 1 and connected thereto. The second air duct further includes a first flow passage 20 connected to the first gap 30, and the first flow passage 20 is arranged along the arrangement direction of the handle mounting structure 2. The first flow passage 20 is arranged in the handle mounting structure 2, so that the second air duct can enter from the handle mounting structure 2, then pass through the first flow passage 20 to the first gap 30, and finally merge with the first air duct to input into the fan, thereby forming a double-air-duct air inlet operation mode.

[0101] The connecting shell 32 is provided with a sealing ring 34 around the outer periphery, and the outer periphery of the sealing ring 34 abuts against the inner surface of the first shell 1. The first shell 1, the sealing ring 34, and the connecting shell 32 are arranged from outside to inside. The sealing ring 34 is arranged around the outer periphery of the connecting shell 32, and the sealing ring 34 abuts against the inner surface of the first shell 1, thereby preventing the connecting shell 34 from moving during fan operation. At the same time, the sealing ring 34 is arranged opposite the fan outlet, thereby preventing flow leakage and improving the stability of the hair dryer operation.

[0102] The sealing ring 34 is arranged at the end away from the fan inlet. The sealing ring 34 is only arranged at the end close to the fan outlet.

[0103] The connecting shell 32 is provided with a connecting groove 325 embedded with the sealing ring 34. This makes the connection position of the sealing ring 34 more stable, thereby preventing the sealing ring 34 from shaking or shifting.

[0104] The sealing ring 34 is arranged to overlap the first flow passage 20 in vertical projection. This prevents the vertical air inlet of the first flow passage 20 from directly entering the fan outlet, thereby preventing flow leakage.

[0105] In vertical projection, the fan 3 partially overlaps the first flow passage 20. This allows fluid entering through the first flow passage 20 to directly enter the first gap 30, complete heat exchange with the fan, and then be transmitted to the first air duct for merging.

[0106] The handle mounting structure 2 is provided with a switch module 21 on one side of the first flow passage 20. This facilitates control of the operation mode of the fan.

[0107] Projected vertically, the switch module 21 and the first gap 30 do not overlap. This ensures that only the first flow channel 20 in the handle mounting structure 2 vertically corresponds to the first gap 30, creating a partitioned configuration to avoid affecting the airflow effect of the first flow channel 20.

[0108] The switch module 21 includes a first frame 211 disposed within the handle mounting structure 2 and connected to the first housing 1, and a switch button 212 disposed within the first frame 211 and extending to the outside. The switch button 212, the first frame 211, and the first flow channel 20 are arranged sequentially. Projected vertically, the first frame 211 and the first gap 30 do not overlap; thus, in the handle mounting structure 2, only the location of the first flow channel 20 vertically corresponds to the first gap 30, and the arrangement is partitioned to avoid affecting the air supply effect of the first flow channel 20.

[0109] A circuit board 22 is fixedly installed inside the first flow channel 20. During the process of fluid being transported in the first flow channel 20, the circuit board 22 is cooled by heat dissipation.

[0110] The circuit board 22 is positioned along the first flow channel 20. This facilitates heat dissipation from the circuit board 22 during fluid flow.

[0111] A heat-conducting plate 221 is provided on the circuit board 22 to contact the airflow through the first flow channel 20. The heat-conducting plate 221 is made of copper sheet, so that the fluid comes into contact with the copper sheet during the flow process to exchange heat and improve the heat exchange efficiency.

[0112] The heat-conducting plate 221 includes a connecting end 2211 connected to the circuit board and a bonding end 2212 connected to the connecting end 2211. The two ends of the bonding end 2212 respectively abut against the components of the circuit board 22 and the airflow of the second flow channel 20. The cross-section of the heat-conducting plate 221 along the airflow direction is "U" shaped, which facilitates bonding with the components of the circuit board 22 and thus improves the heat exchange effect.

[0113] The circuit board 22 is connected to a cable 23, which passes through the first flow channel 20 and extends along the first gap 30 away from the air inlet of the fan 3, passing through the first housing 1. The cable 23 is positioned in the opposite direction to avoid affecting the airflow from the first flow channel 20 to the first gap 30.

[0114] The connecting shell 32 is provided with a through hole 326 for the cable 23 to pass through the space. The through hole 326 is arranged on the side of the sealing ring 34 away from the first gap 30 to avoid the problem of air flow from the air outlet of the fan directly opposite the first flow passage 20. The connection line at the end of the first flow passage 20 is inclined, and even if some air flows out through the through hole 326, it is far away from the air outlet of the fan, thereby avoiding the problem of air flow, and the cable 23 passes through the through hole 326 to fill the space, which can effectively reduce the amount of air flow.

[0115] In the vertical projection, the cable 23 passing through the first shell 1, the sealing ring 34, and the first gap 30 are arranged in sequence and do not overlap each other. The cable 23 passing through the first shell 1, the sealing ring 34, and the first gap 30 are arranged in sequence to avoid the problem of air flow from the air outlet of the fan directly opposite the first flow passage 20.

[0116] The cable 23 is arranged on one side of the first frame 211.

[0117] The handle mounting structure 2 includes an outer shell 24 and an inner shell 25. The switch module is fixedly connected to the inner shell 24. The first flow passage 20 is arranged inside the inner shell 25 and on one side of the light module. The outer shell 24 is in contact with the first shell 1 at the upper end. The first flow passage 20 and the circuit board 22 are arranged inside the inner shell 25. The switch button 212 extends to the outside through the outer shell. The outer shell 24 can be effectively prevented from rotating circumferentially. The handle mounting structure 2 is connected by multiple modules. The outer shell is sleeved on the inner shell, which is convenient for assembly during production.

[0118] The inner shell 25 and the outer shell 24 are provided with a clamping portion at the end away from the first shell 1 to prevent the outer shell 24 from rotating. The clamping portion can effectively connect and fix the inner shell 25 and the outer shell 24, prevent the outer shell 24 from coming out axially, and prevent the outer shell 24 from rotating circumferentially.

[0119] The clamping portion includes a first connecting module fixedly connected to the inner shell 25 and limiting the circumferential direction of the outer shell 24. The first connecting module is arranged to connect the inner shell 25 and the outer shell 24 to prevent them from separating.

[0120] The first connecting module includes a first connecting block 261 fixedly connected to the inner shell and a first limiting groove 262 arranged on the upper end of the first connecting block 261.

[0121] The inner surface of the outer shell 24 is provided with a first limiting strip 241 fitted in a first limiting groove 262. The first connecting block 261 is fixedly connected with the inner shell 25 by screws. After the inner shell 25 is fixedly connected with the first connecting block 261, the first limiting groove 262 is fitted with the first limiting strip 241 to prevent the outer shell 24 from rotating. Since the first limiting strip 241 and the first limiting groove 262 intersect in the vertical projection direction, the bottom of the first limiting groove 262 blocks the axial movement of the first limiting strip 241, thereby preventing the outer shell 24 from rotating and moving axially.

[0122] The first limiting groove 262 and the first limiting strip 241 are provided in one or more groups. The first limiting groove 262 and the first limiting strip 241 are provided in one group or multiple groups around the first connecting block 261. Multiple groups are provided to improve the stability of the limiting.

[0123] The first connecting block 261 is coaxially provided with a first fitting hole 263, a first fitting groove 264 from inside to outside in sequence, and the first limiting groove 262 is provided outside the first fitting groove 264.

[0124] The inner shell 25 is provided with a first fitting part 251 fitted with the first fitting hole 263 and a second fitting part 252 fitted with the first fitting groove 264. Multiple fitting positions are provided to improve the connection stability of the inner shell 25 and the first connecting block 261, and to avoid the shaking of the two after connection affecting the connection stability with the outer shell 24.

[0125] The clamping part further comprises a second connecting block 271 and / or a third connecting block 281 connected with the first connecting block 261. The clamping part has stronger connection stability with the outer shell 24.

[0126] The first connecting module further comprises a first buckle 265 fixedly provided at the lower end of the first connecting block 261 and connected with the second connecting block 271, and / or a second buckle 266 connected with the third connecting block 281. The second connecting block 271 and the third connecting block 281 are provided to form the effect of layer-by-layer arrangement of the outer shell 24, the third connecting block 281 and the second connecting block 271 at the air inlet initial end of the handle mounting structure 2, and multiple layers are surrounded and fitted, thereby improving the connection stability.

[0127] The third connecting block 281 is fixedly provided between the first connecting block 261 and the second connecting block 271. The second connecting block 271 and the third connecting block 281 are provided to form the effect of layer-by-layer arrangement of the outer shell 24, the third connecting block 281 and the second connecting block 271 at the air inlet initial end of the handle mounting structure 2, and multiple layers are surrounded and fitted, thereby improving the connection stability.

[0128] The first buckle 265 and the second buckle 266 are arranged radially one after another with the first connecting block 271 as the center. Arranging multiple buckles can improve the stability of the connection.

[0129] The second connecting block 271 is provided with a first buckle connecting hole 272 connected with the first buckle 265; the third connecting block 281 is provided with a second buckle connecting hole 282 connected with the second buckle 266. The first buckle connecting hole 272 is arranged in groups corresponding to the first buckle 265, and one or more groups are arranged; the second buckle connecting hole 282 is arranged in groups corresponding to the second buckle 266, and one or more groups are arranged; the connection is achieved by buckling, which is convenient for assembly, and after connection, it is beneficial to resist the axial direction of the outer shell, thereby improving the stability of the connection effect.

[0130] The second connecting block 271 is provided with a second embedding groove 273 embedded with the second buckle 266, and the vertical projection of the second embedding groove 273 and the first buckle connecting hole 272 does not overlap. The connection is achieved by buckling, which is convenient for assembly, and after connection, it is beneficial to resist the axial direction of the outer shell, thereby improving the stability of the connection effect.

[0131] The second connecting block 271 is provided with one or more second air inlet holes 274 connected with the first flow channel 20. The second air inlet hole 274 is arranged to allow fluid to flow from the second connecting block 271 to the first flow channel, thereby forming a vertical fluid flow effect.

[0132] The second air inlet hole 274 is coaxially arranged around the second block 271 with the center of the second block 271 as the center. This improves the delivery capacity of the air inlet.

[0133] The inner shell 25 is provided with a communication port 253 communicating the first flow channel 20 and the second air inlet hole 274. External airflow passes through the second air inlet hole 274, the communication port 253, and the first flow channel 20 for circulation.

[0134] The first embedding part 251 penetrates the first connecting block 261, the second connecting block 271, and the third connecting block 281 and communicates with the outside, so that the external power supply of the circuit board is connected;

[0135] In the opposite direction of the fan outlet, the heating module and the connecting shell 32 are arranged in the first shell 1 in sequence and are limited and fixed by mutual resistance. The outer surface of the connecting shell 32 is in contact with the inner surface of the first shell 1. Multiple components are assembled by resistance, which is convenient for assembly, and after assembly, the components are connected by resistance, which has a compact structure and is beneficial to improve the stability of the device connection.

[0136] The first shell 1 is provided with a first abutting table 11 at one end, that is, the first shell 1 is provided with the first abutting table 11 at one side close to the air inlet end of the fan; the heat generating module comprises a heat generating body 51 and a sleeving shell 52 fixedly arranged on the outer periphery of the heat generating body 51, one end of the sleeving shell 52 abuts against the first abutting table 11, and the other end of the sleeving shell 52 abuts against the connecting shell 32. The abutting table 11 abuts against the sleeving shell 52, so that the heat generating module as a whole is prevented from coming out of the first shell 1, and the heat generating module is the end of abutting limiting, and has the effect of end limiting of the whole abutting.

[0137] The inner surface of the sleeving shell 52 is provided with a first embedding strip 521, and the heat generating body 51 is provided with a first embedding port 511 at the end in the direction of the airflow, the first embedding port 511 being embedded with the first embedding strip 521;

[0138] The end of the heat generating body 51 away from the first embedding port 511 abuts against the end of the connecting shell 32. The heat generating body 51 is connected by being embedded with the first embedding strip 521 through the first embedding port 511, the two have a simple assembly mode, and after assembly, the heat generating body 51 and the end of the sleeving shell 52 on the same side are abutted by the connecting shell 32, so that the assembly is completed, the connection stability is improved, and the problem of structure shaking during use is avoided.

[0139] The end of the sleeving shell 52 in the airflow direction is provided with a plurality of ventilation holes 522; and the first air duct is provided through the first air inlet hole 411, the fan 1, the heat generating body 51 and the ventilation hole 522. The first air duct is horizontally provided in the first shell 1 and enters from the first air inlet hole 411 and outputs from the ventilation hole 522.

[0140] The outer surface of the connecting shell 32 is provided with an abutting part 327 abutting against the inner surface of the first shell 1. The connecting shell 32 is coaxially limited in the first shell 1. After the abutting part 327 abuts against the inner surface of the first shell 1, the connecting shell 32 at the initial end is limited in the first shell 1. After the other end of the connecting shell 32 abuts against the heat generating module and the heat generating module is limited by the end of the heat generating module, the assembly of the components in the first shell 1 is completed. The assembly mode is limited and connected by abutting, so that the structure is compact and the installation stability is high.

[0141] The fan is coaxially arranged in the first shell; and the first shell and the handle mounting structure are arranged perpendicularly to each other.

[0142] The technical features of the above-mentioned embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0143] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, under the premise of not departing from the utility model concept, several modifications and improvements can be made, which all belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

[0144] The above has carried out the detailed elaboration to the embodiment of the small double air duct electric hair dryer provided by the utility model. The principle and implementation mode of the utility model are elaborated in this paper by applying specific examples, the above embodiment is only used to help understanding the core idea of the utility model. It should be pointed out that for ordinary skilled person in the art, under the premise of not departing from the principle of the utility model, the utility model can be improved and modified, and these improvements and modifications also fall within the protection range of the claims of the utility model.

Claims

1. A small-sized double-duct electric hair dryer comprising a casing, a blower (3) fixedly provided in the casing, characterized in that, The shell comprises a first shell (1), and the fan (3) is arranged in the first shell (1); the shell is provided with a first air duct and a second air duct in communication; The first air duct is arranged from the air inlet of the fan (3) to the fan; the second air duct comprises a first gap (30) arranged between the fan (3) and the first shell (1), the first gap (30) is in communication with the air inlet of the fan (3), and the handle mounting structure (2) is fixedly connected to the lower portion of the first shell (1); the handle mounting structure (2) comprises a first flow passage (20), and the second air inlet (274) is arranged at the bottom of the handle mounting structure (2); the second air inlet (274) is in communication with the first flow passage (20) and the first gap (30).

2. The compact dual duct electric blower as defined in claim 1, wherein The fan (3) comprises a fan body (31) and a connecting shell (32) arranged on the outer periphery of the fan body (31); the connecting shell (32) and the first shell (1) are provided with the first gap (30).

3. The compact dual duct electric blower as defined in claim 2, wherein, The connecting shell (32) is coaxially arranged in the first shell (1), and the connecting shell (32) is provided with one or more flow grooves (321) arranged therethrough; the flow grooves (321) are in communication with the first gap (30).

4. The compact dual duct electric blower as defined in claim 3, wherein, The fourth gap (33) is arranged between the fan body (31) and the connecting shell (32), and the fourth gap (33) is in communication with the flow grooves (321) and the first gap (30).

5. The compact dual duct electric blower as defined in claim 4, wherein, The outer periphery of the fan body (31) is provided with one or more abutting points (311) abutting against the inner surface of the connecting shell (32), and the abutting points (311) are arranged in the fourth gap (33).

6. The compact dual duct electric blower as defined in claim 2, wherein, The connecting shell (32) is fixedly connected with the first shell (1), wherein the first shell (1) is provided with a first screw connecting column (118); the connecting shell (32) is provided with a second screw connecting column (328) arranged on the same axis as the first screw connecting column (118), and the first screw connecting column (118) and the second screw connecting column (328) are connected by a screw.

7. The compact dual duct electric blower as defined in claim 3, wherein One end of the connecting shell (32) is provided with an abutting block (322), and the fan body (31) is provided with an abutting end (312) abutting against the abutting block (322) to limit the position.

8. The compact dual duct electric blower as defined in claim 3, wherein, The connecting shell (32) is connected with the first air inlet module (4) at one end close to the air inlet of the fan, the first air inlet module (4) is partially embedded in the first shell (1), the first air inlet module (4) is coaxially arranged with the fan (3), and the first air inlet module (4) is in communication with the air inlet of the fan (3) and the first gap (30).

9. The compact dual duct electric blower as defined in claim 8, wherein, The first air inlet module (4) comprises a first air inlet block (41) and a first connecting block (42) coaxially embedded and fixed with the first air inlet block (41); the first connecting block (42) is coaxially buckled and connected to one end of the outer periphery of the connecting shell (32) close to the air inlet of the fan.

10. The compact dual duct electric blower as defined in claim 9, wherein, The first air inlet block (41), the first connecting block (42) and the first gap (30) are in communication with each other.

Images