Air pipe mechanism and blower

Abstract

The utility model relates to the technical field of electric tools, and particularly discloses an air pipe mechanism and a blower, the air pipe mechanism comprises an air inlet pipe, an air outlet pipe, a mounting pipe and a fan; the air inlet pipe and the air outlet pipe are in coaxial butt joint, the air inlet pipe is provided with an air inlet, the air outlet pipe is provided with an air outlet, a flow guide ring is installed at the air inlet of the air inlet pipe, a plurality of supporting pieces are arranged in the flow guide ring, and one side wall of each supporting piece is an obliquely-arranged flow guide wall. The mounting pipe is fixed in the air inlet pipe, a mounting seat for mounting a fan is arranged in the middle of the mounting pipe, a plurality of flow deflectors are arranged between the mounting seat and the inner wall of the mounting pipe, and the flow deflectors are obliquely arranged towards the air outlet pipe; the fan comprises a motor and a fan driven by the motor to rotate, the motor is fixed in the mounting base, the fan is rotatably connected to the end wall of the mounting base, and the fan is located between the flow deflector and the supporting piece; the inclination direction of the flow guide walls is the same as that of fan blades of the fan, and the inclination direction of the flow deflectors is opposite to that of the fan blades of the fan.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a hair dryer and parts thereof. Background Art

[0002] A hair dryer generally refers to an electric tool used to clean up fallen leaves, accumulated water, and accumulated snow. A motor and a fan are installed inside the air duct of the hair dryer. The blades of the fan generally have a concave surface and a convex surface, and the blades of the fan are arranged to be tilted axially so that the concave surface of the blades face the rotation direction of the fan. Based on this, the fan is rotated so that the concave surface of the blades stirs the air, and the high-speed rotation generates an airflow that blows forward, so that the air outlet of the air duct can blow away objects such as fallen leaves, accumulated water, and accumulated snow. The air duct structure of existing hair dryers is relatively simple, generally adopting a straight-cylinder structure or a conical-cylinder structure, and in order to ensure the structural stability of the air duct, a plurality of supporting ribs are arranged at the air inlet. The arrangement of the supporting ribs will cause the incoming airflow at this point in the air duct to be blocked, resulting in a reduction in the incoming air volume, and then a reduction in the air outlet and wind force. Utility Model Content

[0003] In view of this, the utility model provides an air duct mechanism for solving the problem of low air volume and wind force of the hair dryer in the prior art.

[0004] In order to achieve one, part or all of the above purposes or other purposes, the utility model proposes:

[0005] An air duct mechanism comprises an air inlet duct, an air outlet duct, a mounting pipe and a fan;

[0006] The air inlet pipe is coaxially connected with the air outlet pipe, the air inlet pipe has an air inlet, the air outlet pipe has an air outlet, the air inlet pipe is equipped with a guide ring at the air inlet, a plurality of support sheets are arranged in the guide ring, and one side wall of the support sheet is an inclined guide wall;

[0007] The mounting tube is fixed in the air inlet tube, and a mounting seat for mounting the fan is provided in the middle of the mounting tube, and a plurality of guide plates are provided between the mounting seat and the inner wall of the mounting tube, and the guide plates are arranged obliquely toward the air outlet tube;

[0008] The fan includes a motor and a fan driven to rotate by the motor, and a plurality of inclined blades are arranged on the outer wall of the fan, the motor is fixed in the mounting seat, the fan is rotatably connected to the end wall of the mounting seat, and the fan is between the guide plate and the support plate;

[0009] The inclination direction of the guide wall is the same as the inclination direction of the fan blades, and the inclination direction of the guide plate is opposite to the inclination direction of the fan blades.

[0010] Furthermore, the cross section of the inner wall of the guide ring is trapezoidal, and the end of the guide ring with a smaller inner diameter is connected to the air inlet of the air inlet pipe.

[0011] Furthermore, the inner diameter of the end of the air outlet pipe away from the air outlet is larger than the inner diameter of the end of the air inlet pipe away from the air inlet, the inner wall of the air outlet pipe is provided with a plurality of connecting rods connected to the outer wall of the air inlet pipe, and the inner wall of the air outlet pipe and the outer wall of the air inlet pipe are enclosed at the connecting rods to form a plurality of guide ports.

[0012] Furthermore, the mounting seat and the guide plate extend outward from the mounting tube along the axial direction of the mounting tube to form a guide portion, and the guide portion has an overall conical structure. When the mounting tube is fixed to the air inlet pipe, the guide portion is placed in the air outlet pipe, and the plurality of guide ports are distributed around the outside of the guide portion.

[0013] Furthermore, the air inlet pipe is arranged in an overall cylindrical tube shape or an overall frustum tube shape, the air outlet pipe is arranged in an overall cylindrical tube shape or an overall frustum tube shape, and the inner diameter of one end of the air outlet pipe provided with the air outlet is smaller than the inner diameter of one end of the air outlet pipe provided with the connecting rod.

[0014] Furthermore, the guide plate includes two opposite side walls, one side wall is an outward convex arc wall, and the other side wall is an inward concave arc wall, and the curvature of the outward convex arc wall is greater than the curvature of the inward concave arc wall, the inward concave arc wall faces the air outlet pipe, and the outward convex arc wall faces the air inlet pipe.

[0015] Furthermore, a transition ring is provided between the guide ring and the air inlet pipe, and the inner wall of the transition ring is an axially curved arc inner wall.

[0016] Furthermore, the guide wall includes an inclined section and a vertical section, the inclined section is close to the inside of the air inlet pipe, the vertical section is far away from the inside of the air inlet pipe, and the width of the vertical section is smaller than the width of the inclined section.

[0017] Furthermore, the outer side wall of the air inlet pipe is also provided with an externally connected notch, and the outer wall of the mounting pipe and the inner wall of the air inlet pipe are combined to form a wire passing groove, and the wire passing groove is connected to the externally connected notch.

[0018] A hair dryer comprises the above-mentioned air duct mechanism and a handle, one end of the handle is connected to the air outlet duct and the air inlet duct, the other end of the handle is provided with a power supply and a control module, and the control module is electrically connected to the blower through a wire.

[0019] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0020] The air duct mechanism installs a guide ring at the air inlet of the air inlet duct, and uses multiple support plates on the guide ring and inclined guide walls on the support plates to improve the efficiency of sucking air flow when the fan rotates, thereby improving the air output of the air duct mechanism and solving the problem of small air output caused by air flow obstruction caused by the air inlet support strips of the traditional hair dryer; and then by arranging multiple inclined guide plates in the air outlet duct, the multiple guide plates divide the air flow generated by the fan into multiple air flows that enter the air outlet duct in a spiral shape and are finally blown out through the air outlet, effectively improving the blowing efficiency and wind force of the air duct mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure in one of the embodiments;

[0023] Figure 2 An exploded view of the overall structure in one of the embodiments;

[0024] Figure 3 It is an orthographic projection view of the overall structure in one of the embodiments;

[0025] Figure 4 It is a cross-sectional view of the overall structure in one of the embodiments;

[0026] Figure 5 This is a schematic diagram of the structure of a guide ring in one of the embodiments;

[0027] Figure 6 It is an orthographic projection view of the guide ring in two directions in one embodiment;

[0028] Figure 7 It is a schematic diagram of the structure of the installation tube in one of the embodiments;

[0029] Figure 8 It is an orthographic projection view of the installation tube in two directions in one embodiment.

[0030] Reference numerals:

[0031] 1 air inlet pipe, 10 external notch, 11 wire groove, 2 air outlet pipe, 20 guide port, 3 mounting pipe, 30 mounting seat, 31 guide plate, 310 convex arc wall, 311 concave arc wall, 32 guide part,

[0032] 4 fans, 40 fans, 5 guide rings, 50 support sheets, 500 guide walls, 500a inclined sections, 500b vertical sections, 6 transition rings. DETAILED DESCRIPTION

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0036] See attached Figure 1 - Attachment Figure 8 The present embodiment discloses an air duct mechanism; the air duct mechanism comprises an air inlet pipe 1, an air outlet pipe 2, a mounting pipe 3 and a fan 4; the air inlet pipe 1 is coaxially connected with the air outlet pipe 2, the air inlet pipe 1 has an air inlet, the air outlet pipe 2 has an air outlet, the air inlet pipe 1 is provided with a guide ring 5 at the air inlet, a plurality of support sheets 50 are provided in the guide ring 5, and a side wall of the support sheet 50 is an inclined guide wall 500; the mounting pipe 3 is fixed in the air inlet pipe 1, and a mounting seat 30 for mounting the fan 4 is provided in the middle of the mounting pipe 3, and the mounting seat 30 and the mounting pipe 3 are connected. A plurality of guide plates 31 are arranged between the inner walls, and the guide plates 31 are arranged obliquely toward the air outlet duct 2; the fan 4 includes a motor and a fan 40 driven to rotate by the motor, and a plurality of inclined blades are arranged on the outer wall of the fan 4, the motor is fixed in the mounting seat 30, the fan 40 is rotatably connected to the end wall of the mounting seat 30, and the fan 40 is interposed between the guide plates 31 and the support plates 50; the inclination direction of the guide wall 500 is the same as the inclination direction of the blades of the fan 4, and the inclination direction of the guide plates 31 is opposite to the inclination direction of the blades of the fan 4.

[0037] Specifically, a circular ring is provided at the center of the guide ring 5, and a plurality of support sheets 50 connect the guide ring 5 and the circular ring. The plurality of support sheets 50 are evenly distributed in the circumferential direction, and the axes of the plurality of support sheets 50 do not pass through the center of the guide ring 5, but are distributed in a spiral shape. The support sheets 50 form an acute angle with the outer wall of the circular ring, and the guide wall 500 is provided on the side wall close to the acute angle. When the internal fan 40 rotates, the gas outside the air inlet is sucked in to generate a spiral airflow. Therefore, in this embodiment, the plurality of support sheets 50 on the guide ring 5 are distributed in a spiral shape on the plane, so that the external airflow can enter the air inlet pipe 1 more quickly to improve the air intake efficiency. In this embodiment, the fixed The blades of the fan 40 fixed in the air inlet duct 1 are inclined, and the blades have a convex surface and a concave surface, wherein the convex surface of the blade faces the air inlet and the concave surface of the blade faces the air outlet. When the fan 40 rotates, the airflow will be introduced along the convex surface of the blade and guided out by the concave surface of the next blade, thereby generating an airflow toward the air outlet. Based on this, when a plurality of blades rotate rapidly at the same time, the inhaled airflow will present a spiral inward shape, that is, the inhaled airflow is not completely perpendicular to the axial surface of the air inlet duct 1. For this reason, an inclined guide wall 500 is provided on the side wall of the support sheet 50, wherein the guide wall 500 is inclined toward the inside of the air inlet duct 1, specifically toward the convex surface of the blade of the fan 40, and when the fan 40 is operated as shown in the attached Figure 3 When rotating in the clockwise direction as shown in FIG. Figure 5 The right side of the support sheet 50 shown, that is, the acute angle between the support sheet 50 and the circular ring is on the right side. At this time, after the airflow enters the guide ring 5, it will quickly enter the air inlet pipe 1 along the guide wall 500, so that the airflow passing through the guide ring 5 can flow to the convex surface of the fan blades of the fan 40 more quickly, thereby improving the efficiency of the fan 40 inhaling the external airflow, thereby avoiding the problem of low air intake efficiency caused by the airflow blocking by the support strips of the rear cover of the traditional hair dryer. The setting of the guide wall 500 can effectively increase the air intake volume of the air duct mechanism, thereby enhancing the output air volume and wind force of the air outlet; in this embodiment, a mounting is coaxially fixed in the air inlet pipe 1 The mounting tube 3 is provided with a mounting seat 30 at one end of the mounting tube 3 close to the air inlet 1, wherein the mounting seat 30 is hollow for easy installation of the motor, and a fan 40 is rotatably connected to the end wall of the mounting seat 30 close to the air inlet, and the fan 40 is fixedly connected to the output shaft of the motor, and a plurality of guide vanes 31 are provided between the mounting seat 30 and the inner wall of the mounting tube 3, and the guide vanes 31 are inclined toward the air inlet 1. Since the inclination direction of the blades of the fan 40 is opposite to the inclination direction of the guide vanes 31, the concave surface of the blades faces the air outlet and is obliquely aligned with the inclined side wall of the guide vane 31. When the fan 40 is operated as attached Figure 3When rotating in the clockwise direction as shown by the arrow, the airflow stirred by the concave surface of the blades of the fan 40 quickly flows to the inclined side wall of the guide vane 31, and the airflow generated by the high-speed rotating fan 40 passes through the multiple guide vanes 31 to form multiple airflows which are discharged through the air outlet in a spiral shape. The inclined guide vanes 31 facilitate the airflow generated by the fan 40 to quickly enter the air outlet duct 2, and the arrangement of the multiple guide vanes 31 allows the airflow generated by the fan 40 to be divided into multiple high-pressure airflows, thereby avoiding airflow turbulence at the connection between the air outlet duct 2 and the air inlet duct 1, thereby greatly improving the blowing efficiency and blowing wind force of the air duct mechanism.

[0038] It should also be noted that the guide ring 5 and the mounting tube 3 are both detachable structures, so that according to the different inclination directions of the blades of the fan 40, a mounting tube 3 with a guide ring 5 or a guide plate 31 with different inclination directions of the guide wall 500 can be selected.

[0039] In summary, this embodiment installs a guide ring 5 at the air inlet of the air inlet duct 1, and improves the efficiency of sucking air flow when the fan 40 rotates through multiple support plates 50 on the guide ring 5 and the inclined guide walls 500 on the support plates 50, thereby improving the air output of the air duct mechanism, and solving the problem of small air output caused by air flow obstruction caused by the air inlet support strips of the traditional hair dryer; and then, by arranging multiple inclined guide plates 31 in the air outlet duct 2, the multiple guide plates 31 divide the airflow generated by the fan 40 into multiple airflows that enter the air outlet duct 2 in a spiral shape, and finally blow them out through the air outlet, thereby effectively improving the blowing efficiency and wind force of the air duct mechanism.

[0040] In order to facilitate the external airflow to enter the air inlet duct 1 more smoothly, the cross-section of the inner wall of the guide ring 5 is trapezoidal, and the end with a smaller inner diameter of the guide ring 5 is connected to the air inlet of the air inlet duct 1. Since the air inlet duct 1 is embedded with the mounting tube 3, the airflow will inevitably enter the gap between the mounting tube 3 and the air inlet duct 1. Therefore, this embodiment also provides a transition ring 6 between the guide ring 5 and the mounting tube 3. The inner wall of the transition ring 6 is an axially bent arc inner wall. In summary, through the inclined design of the inner wall of the guide ring 5 and the arc inner wall of the transition ring 6, the airflow enters the guide ring 5 and passes through the transition ring 6 and the mounting tube 3 to reach the blades of the fan 40, thereby reducing unnecessary obstruction of the air duct mechanism during the inhalation of the airflow, improving the efficiency of the inhalation of the airflow, and thereby increasing the air output of the air duct mechanism.

[0041] See attached Figure 5 and attached Figure 6The guide wall 500 of the support sheet 50 includes an inclined section 500a and a vertical section 500b. The inclined section 500a is close to the inside of the air inlet duct 1, and the vertical section 500b is far away from the inside of the air inlet duct 1, and the width of the vertical section 500b is smaller than the width of the inclined section 500a. Specifically, the vertical section 500b is perpendicular to the axial surface of the guide ring 5. The vertical section 500b can make the guide ring 5 smooth and without gaps when viewed from the outside, thereby improving the aesthetics of the air duct structure. The proportion of the inclined section 500a on the guide wall 500 is greater than the proportion of the vertical section 500b on the guide wall 500, so as to ensure the guide effect of the guide wall 500. It should also be noted that the proportion of the vertical section 500b on the guide wall 500 can be 0, that is, the inclined section 500a is designed to penetrate the inclined surface from the outer end surface to the inner end surface of the support sheet 50.

[0042] See attached Figure 4 The inner diameter of the end of the air outlet pipe 2 away from the air outlet is larger than the inner diameter of the end of the air inlet pipe 1 away from the air inlet. The inner wall of the air outlet pipe 2 is provided with a plurality of connecting rods connected to the outer wall of the air inlet pipe 1. The inner wall of the air outlet pipe 2 and the outer wall of the air inlet pipe 1 are surrounded by a plurality of guide ports 20 at the connecting rods. Specifically, the air outlet pipe 2 is provided with a cone-shaped cylindrical structure as a whole, and the inner diameter of the end of the air outlet pipe 2 provided with the air outlet is smaller than the inner diameter of the end of the air outlet pipe 2 provided with the connecting rod. Through the cone-shaped air outlet pipe 2, the diameter of the air outlet is reduced to gather the air in the air outlet pipe 2 at the air outlet with a small diameter. , thereby increasing the wind force of the airflow discharged from the air outlet, enhancing the wind force of the air duct mechanism, and clearing snow and water more quickly; since the guide plate 31 is arranged at the end of the mounting tube 3 away from the air inlet, that is, the guide plate 31 is located at the end of the air inlet pipe 1 close to the air outlet pipe 2, when the high-speed airflow generated by the fan 40 passes through the guide plate 31 and enters the air inlet pipe 1, the negative pressure generated by the high-speed airflow will suck the external airflow into the air outlet pipe 2 through the guide port 20. The airflow is supplemented into the air outlet pipe 2 through the guide hole, which can greatly increase the air output of the air duct mechanism. It should also be noted that the air inlet pipe 1 can adopt an overall cylindrical tube shape or an overall frustum tube shape. The present embodiment is shown in a cylindrical tube shape. When the air inlet pipe 1 adopts a frustum tube shape as a whole, the inclination of the side wall of the air inlet pipe 1 is the same as the inclination of the side wall of the air outlet pipe 2. Accordingly, the air outlet pipe 2 can also adopt the same cylindrical structure as the air inlet pipe 1. The specific configuration can be determined according to actual needs, and the present embodiment is not limited to this.

[0043] When the airflow enters the air outlet duct 2 through the guide port 20, part of the airflow will be attracted by the rotation of the fan 40 and enter between the multiple blades. In order to quickly guide this part of the airflow into the rotation of the fan 40 and increase the air volume sucked in by the fan 40, the mounting seat 30 and the guide plate 31 extend along the axial direction of the mounting tube 3 to the outside of the mounting tube 3 to form a guide portion 32. The guide portion 32 has an overall conical structure. When the mounting tube 3 is fixed to the air inlet duct 1, the guide portion 32 is placed in the air outlet duct 2, and multiple guide ports 20 are distributed around the outside of the guide portion 32. Figure 1 and attached Figure 4 As shown, the guide portion 32 is arranged in a cone shape toward the air outlet duct 2, so that part of the airflow attracted into the air outlet duct 2 by the negative pressure can enter the convex surface of the blade of the fan 40 through the guide plate 31 at the guide portion 32 without being discharged with the external exhaust airflow, and then be fanned to the inclined surface of the guide plate 31 by the concave surface of the next blade. In order to quickly introduce this part of the airflow, the guide plate 31 of this embodiment includes two opposite side walls, one side wall is an outer convex arc wall 310, and the other side wall is an inner concave arc wall 311, and the curvature of the outer convex arc wall 310 is greater than the curvature of the inner concave arc wall 311, the inner concave arc wall 311 faces the air outlet duct 2, and the outer convex arc wall 310 faces the air inlet duct 1, and the outer convex arc wall 310 is used to guide the airflow through the guide plate 310. The airflow of the air outlet duct 2 entering through the port 20 is quickly introduced into the fan 40, and the direction of the airflow is changed by the convex curved wall 310 with a larger curvature, ensuring that this part of the airflow is smoothly introduced into the multiple blades of the fan 40; on the contrary, the concave curved wall 311 with a smaller curvature quickly introduces the high-pressure airflow fanned by the concave surface of the blades of the fan 40 into the air outlet duct 2, and finally blows it out through the air outlet; the air duct mechanism improves the utilization rate of the airflow entering through the guide port 20 by means of the guide part 32, realizes the supplement of the air outlet volume, and increases the air intake volume inhaled by the fan 40. The combination of the two greatly improves the blowing efficiency of the air duct mechanism, and the concave curved wall 311 of the guide plate 31 further improves the wind force blown out by the air duct mechanism.

[0044] In order to further expand the functionality of the air duct mechanism, the outer wall of the air inlet duct 1 is also provided with an external slot 10, which can be used to install display screens, operation buttons, etc., and can be selected according to actual production needs. In order to facilitate the power supply and communication of electronic components installed in the external slot 10, in the present embodiment, the outer wall of the mounting tube 3 and the inner wall of the air inlet duct 1 are enclosed to form a wire groove 11, and the wire groove 11 is connected to the external slot 10, and the wires used to connect the components in the external slot 10 are connected to other control components installed on the air duct mechanism via the wire groove 11.

[0045] The present embodiment also provides a hair dryer, which includes the above-mentioned air duct mechanism and handle, one end of the handle is connected to the air outlet duct 2 and the air inlet duct 1, and the other end of the handle is provided with a power supply and a control module, and the control module is electrically connected to the fan 4 through a wire. The handle, power supply and control module are not shown in the drawings of the present embodiment. The user can use the hair dryer to blow and clean accumulated water, snow or fallen leaves by holding the handle.

[0046] Based on the above scheme, this embodiment sets up three test objects for two test conditions: test object 1 is a hair dryer with a traditional straight air duct, test object 2 is a hair dryer using a guide ring 5, and test object 3 is a hair dryer using an air inlet duct and an air outlet duct with a guide port 20, as shown in Table 1 and Table 2:

[0047]

[0048] Table 1

[0049]

[0050] Table 2

[0051] It can be seen from Table 1 or Table 2 that under the same power conditions, the thrust and force efficiency of the hair dryer using the guide ring 5 or the guide port 20 provided in this embodiment are greater than those of the hair dryer with a traditional straight air duct, and by comparing Table 2 with Table 1, it can be found that when the power is greater, the hair dryer using the guide ring 5 or the guide port 20 provided in this embodiment has a greater advantage than the hair dryer with a traditional straight air duct; and the hair dryer provided in this embodiment combines the guide ring 5 and the guide port 20 at the same time, and has a stronger wind thrust and a larger air volume than the hair dryer with a traditional straight air duct, and the blowing efficiency is significantly improved.

[0052] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A wind pipe mechanism, characterized in that: Including air inlet pipe, air outlet pipe, installation pipe and fan; The air inlet pipe is coaxially connected with the air outlet pipe, the air inlet pipe has an air inlet, the air outlet pipe has an air outlet, the air inlet pipe is equipped with a guide ring at the air inlet, a plurality of support sheets are arranged in the guide ring, and one side wall of the support sheet is an inclined guide wall; The mounting tube is fixed in the air inlet tube, and a mounting seat for mounting the fan is provided in the middle of the mounting tube, and a plurality of guide plates are provided between the mounting seat and the inner wall of the mounting tube, and the guide plates are arranged obliquely toward the air outlet tube; The fan includes a motor and a fan driven to rotate by the motor, and a plurality of inclined blades are arranged on the outer wall of the fan, the motor is fixed in the mounting seat, the fan is rotatably connected to the end wall of the mounting seat, and the fan is between the guide plate and the support plate; The inclination direction of the guide wall is the same as the inclination direction of the fan blades, and the inclination direction of the guide plate is opposite to the inclination direction of the fan blades.

2. The air duct mechanism according to claim 1, characterized in that: The cross section of the inner wall of the guide ring is trapezoidal, and the end of the guide ring with a smaller inner diameter is connected to the air inlet of the air inlet pipe.

3. The air duct mechanism according to claim 2, characterized in that: The inner diameter of the end of the air outlet pipe away from the air outlet is larger than the inner diameter of the end of the air inlet pipe away from the air inlet. The inner wall of the air outlet pipe is provided with multiple connecting rods connected to the outer wall of the air inlet pipe. The inner wall of the air outlet pipe and the outer wall of the air inlet pipe are surrounded by multiple guide ports at the connecting rods.

4. The air duct mechanism according to claim 3, characterized in that: The mounting seat and the guide plate extend outward from the mounting tube along the axial direction of the mounting tube to form a guide portion, and the guide portion has an overall conical structure. When the mounting tube is fixed to the air inlet pipe, the guide portion is placed in the air outlet pipe, and the plurality of guide ports are distributed around the outside of the guide portion.

5. The air duct mechanism according to claim 3, characterized in that: The air inlet pipe is arranged in an overall cylindrical tube shape or an overall frustum tube shape, the air outlet pipe is arranged in an overall cylindrical tube shape or an overall frustum tube shape, and the inner diameter of one end of the air outlet pipe provided with the air outlet is smaller than the inner diameter of one end of the air outlet pipe provided with the connecting rod.

6. The air duct mechanism according to claim 1, characterized in that: The guide plate includes two opposite side walls, one side wall is an outward convex arc wall, and the other side wall is an inward concave arc wall, and the curvature of the outward convex arc wall is greater than the curvature of the inward concave arc wall, the inward concave arc wall faces the air outlet pipe, and the outward convex arc wall faces the air inlet pipe.

7. The air duct mechanism according to claim 2, characterized in that: A transition ring is arranged between the guide ring and the mounting tube, and the inner wall of the transition ring is an axially curved arc inner wall.

8. The air duct mechanism according to claim 2, characterized in that: The guide wall includes an inclined section and a vertical section, the inclined section is close to the inside of the air inlet pipe, the vertical section is far away from the inside of the air inlet pipe, and the width of the vertical section is smaller than the width of the inclined section.

9. The air duct mechanism according to claim 8, characterized in that: The outer side wall of the air inlet pipe is also provided with an externally connected notch, and the outer wall of the mounting pipe and the inner wall of the air inlet pipe are combined to form a wire passing groove, which is connected to the externally connected notch.

10. A hair dryer, characterized in that: It comprises the air duct mechanism and handle as described in any one of claims 1 to 9, one end of the handle is connected to the air outlet duct and the air inlet duct, and the other end of the handle is provided with a power supply and a control module, and the control module is electrically connected to the fan through a wire.

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