CN218527972U

CN218527972U - Air duct

Info

Publication number: CN218527972U
Application number: CN202222199973.5U
Authority: CN
Inventors: 魏绵嘉
Original assignee: Shenzhen Fenda Technology Co Ltd
Current assignee: Shenzhen Fenda Technology Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-02-28
Anticipated expiration: 2032-08-19

Abstract

The utility model belongs to the technical field of household appliances, and provides an air duct, which comprises a bell mouth-shaped bracket, wherein an air guide frame is arranged at the inner side of the bell mouth of the bracket, the air guide frame consists of a closed end and an open end, the open end of the air guide frame extends towards one end of the bell mouth of the bracket, so that a gap between the bracket and the air guide frame forms an annular air duct, and the cross section of one section of the annular air duct is gradually reduced along the fluid direction; when wind flows through the annular air duct with the gradually reduced cross section, the fluid is compressed, the pressure is raised, the wind pressure and the wind speed of wind outlet of the wind barrel are increased, and the noise can be reduced.

Description

Air duct

Technical Field

The utility model belongs to the technical field of domestic appliance, especially, relate to an air duct.

Background

The dryer both hairdryer is the little household electrical appliances of personal care type that can make the hair air-dry fast, can heat through the heater strip, makes wind become hot to make the hair more fast dried.

The existing air duct generally comprises a handheld end and a barrel body connected with the handheld end, an air inlet net, a motor, a rectifier, a heater, an air nozzle and other components are arranged in the barrel body, the motor sucks air from the air inlet net, the air is heated by the heater and then blown out by the air nozzle, the rectifier (also called a flow guide frame) is used for adjusting the fluid, an ordinary fan is directly blown out from the interior of the rectifier, the air duct has the problems of two aspects, namely small air pressure, low air drying efficiency and large noise in the second aspect, and the air duct is not beneficial to users.

Therefore, a wind barrel is needed to solve the problems of small wind pressure and low air drying efficiency of the wind barrel; the noise is big, is unfavorable for the problem that the user used.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an air duct, support including the horn mouth form the horn mouth department inboard of support is provided with the wind-guiding frame, the wind-guiding frame comprises closed end and open end, the open end of wind-guiding frame to support horn mouth one end extends, makes the support with clearance between the wind-guiding frame forms annular air duct, one section in the annular air duct reduces along fluid direction cross section gradually.

Optionally, the distance from the outer side wall of the wind guide frame to the inner wall of the bracket in the fluid direction is continuously reduced.

Optionally, the outer side wall of the air guide frame is provided with a plurality of uniformly distributed flaky guide wings, and the closed end of the air guide frame is connected with the support through the guide wings to divide the annular air duct into intervals with uniform space.

Optionally, a tubular rectifier is further disposed at the open end of the air guide frame, and one end of the rectifier is hermetically connected to the open end of the air guide frame.

Optionally, the air guide frame and the rectifier are integrally formed into a heating unit.

Optionally, the cross section of the rectifier is smaller than or equal to the cross section of the joint of the rectifier and the air guide frame, so that the resistance of the fluid is reduced.

Optionally, the rectifier is further provided with a sheet-shaped heating unit for heating the fluid, and one end of the sheet-shaped heating unit is aligned with one end of the guide vane and is consistent in number, so that the fluid can be uniformly heated.

Optionally, two side surfaces of the annular air duct are smooth surfaces.

Optionally, an air nozzle is further arranged at the horn mouth of the support, an air outlet is formed in the air nozzle, and fluid in the annular air duct is discharged from the air outlet through the outer side surface of the rectifier.

Optionally, the cross section of the air outlet end of the annular air duct in the fluid direction is larger than that of the air outlet.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides an air duct, including the support of horn mouth form, be provided with the wind-guiding frame in the horn mouth department inboard of support, the wind-guiding frame comprises closed end and open end, and the open end of wind-guiding frame extends to support horn mouth one end, makes the clearance between support and the wind-guiding frame form annular air duct, and one section in the annular air duct reduces along fluid direction cross section gradually; when wind flows through the annular air duct with the gradually reduced cross section, the fluid is compressed, the pressure is increased, the wind pressure and the wind speed of wind discharged from the wind barrel are increased, and the noise can be reduced.

Drawings

Fig. 1 is a schematic view of a partial cross section and an annular air duct of the present invention;

fig. 2 is an exploded view of a part of the structure of the wind tunnel of the present invention;

fig. 3 is a half-sectional schematic view of a part of the structure of the wind tunnel of the present invention;

fig. 4 is another exploded view of the partial structure of the wind tunnel of the present invention;

fig. 5 is another exploded view of the structure of the wind tunnel of the present invention;

fig. 6 is a schematic cross-sectional view of a part of the structure of the wind tunnel of the present invention.

Illustration of the drawings:

100. an annular air duct; 200. an air duct; 201. a hand-held portion; 202. a barrel; 203. an air inlet net; 204. a motor; 205. a rectifier; 206. a heating unit; 207. a tuyere; 208. an annular groove; 209. a support; 210. a motor base; 211. an air guide frame; 212. mesh openings; 213. a through groove; 214. a guide vane; 215. a stopper; 216. a limiting groove; 217. and (7) air outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described in the following can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-6, the embodiment of the utility model provides an air duct 200, including handheld portion 201 and the barrel 202 of being connected with handheld portion 201, the barrel 202 inboard has connected gradually and has been equipped with into net 203, motor 204, rectifier 205, heating element 206 and tuyere 207, and it is used for providing the passageway for the air inlet of air duct 200 to go into net 203, and motor 204 is used for induced drafting to get into air duct 200, and rectifier 205 is used for adjusting the inside fluid wind's of air duct 200 flow direction, and heating element 206 is used for heating fluid wind, is formed with air outlet 217 output fluid wind on the tuyere 207. The tuyere 207 is formed with an annular groove 208, and the end of the commutator 205 is fitted into the annular groove 208 to be tightly fitted, thereby preventing air leakage. It should be noted that, in the present invention, according to the flow direction of the wind in the wind barrel 200, the side of the wind inlet net 203 is the wind inlet end or the wind inlet side, and the side of the wind nozzle 207 is the wind outlet end or the wind outlet side. A support 209 is arranged between the outer side of the motor 204 and the inner side of the barrel 202 in the barrel 202, the support 209 is horn-shaped, one end of the support 209 is large, the other end of the support is small, the small end of the support is tubular, the small end of the support is an air inlet end, and the large end of the support is an air outlet end. The small end of the bracket 209 is formed with a motor base 210, and the motor 204 is tightly mounted on the motor base 210 by means of bonding, clamping or screwing. The front end of the motor 204 is tightly connected with the air inlet net 203, and the rear end thereof is provided with an air guide frame 211, wherein the front end of the motor 204 is an air inlet side, and the rear end is an air outlet side. The end face of the air inlet net 203 is provided with honeycomb-shaped meshes 212, the side face of the air inlet net 203 is provided with a plurality of through grooves 213, the meshes 212 and the through grooves 213 are used for air inlet, and the meshes 212 and the through grooves 213 occupy most of the area of the air inlet net 203, so that the enough air inlet volume of the air duct 200 can be ensured.

Further, the air guide frame 211 is composed of a closed end and an open end, the open end of the air guide frame 211 extends towards one end of the bell mouth of the support 209, so that a gap between the support 209 and the air guide frame 211 forms an annular air duct 100, and the cross section of one section of the annular air duct 100 is gradually reduced along the fluid direction. Specifically, the air guide frame 211 is a basin-shaped structure, and the outer side wall of the air guide frame 211 is a smooth surface, so that the wind resistance can be effectively reduced. The closed end (the basin bottom of the air guide frame 211) outer wall of the air guide frame 211 is uniformly provided with a plurality of flaky guide wings 214, the inner wall of the support 209 is provided with a plurality of stoppers 215, the guide wings 214 correspond to the stoppers 215, the guide wings 214 are embedded in the stoppers 215 so that the air guide frame 211 is connected with the support 209 in an installing manner, the air guide frame 211 can be prevented from falling off, the annular air duct 100 can be divided into intervals with uniform space, and the interval is more uniform when the air duct 200 heats the fluid air.

Further, an open end of the air guide frame 211 (i.e., a basin opening of the air guide frame 211) extends to a bell mouth of the barrel 202, so that a gap between an outer wall of the air guide frame 211 and an inner wall of the bracket 209 forms an annular air duct 100, and a cross section of the annular air duct 100 is gradually reduced from an air inlet end to an air outlet end, that is, a distance from an outer side wall of the air guide frame 211 to an inner wall of the bracket 209 along a fluid direction is continuously reduced; specifically, as shown in fig. 6, the cross-sectional area of the annular duct 100 at a gradually decreases toward B, and smoothly transitions from a to B; when the wind flows through the annular wind channel 100 with the gradually reduced cross section, the fluid is compressed, the pressure is increased, the wind pressure and the wind speed of the wind outlet of the wind cylinder 200 are increased, and the noise can be reduced. Preferably, the cross section of the air outlet end of the annular air duct 100 is larger than the cross section of the air outlet 217, so that the air pressure and the air speed of the air outlet of the air duct 200 can be further improved. The fluid in the annular air duct 100 is discharged from the air outlet 217 through the outer side surface of the rectifier 205, so that the wind speed is increased, and the noise is reduced.

Furthermore, the open end of the air guide frame 211 is tightly connected with a rectifier 205, the rectifier 205 is of a tubular structure, and the air guide frame 211 and the rectifier 205 can be integrally manufactured, so that the production cost is saved. The rectifier 205 is connected with the air guide frame 211, so that the fluid air flows to the outer side of the rectifier 205, namely the fluid air is limited to flow through the annular air duct 100 between the outer wall of the air guide frame 211 and the inner wall of the support 209, and the fluid air cannot enter the rectifier 205 to cause pressure drop of the fluid air. The outer side wall of the rectifier 205 is provided with a plurality of limiting grooves 216, the heating unit 206 is a sheet-shaped body, and the plurality of heating units 206 are embedded in the rectifier 205 and are clamped through the limiting grooves 216, so that the heating unit 206 can be stably installed; the position and number of the limiting groove 216 and the limiting device 215 are all corresponding, so that the heating unit 206 can respectively heat the fluid air divided into a plurality of parts, and the fluid air is heated more uniformly. The outer side wall of the air guide frame 211 to the outer side wall of the rectifier 205 is formed into a smooth surface, so that two side surfaces of the annular air duct 100 are smooth surfaces, that is, the air guide frame 211 and the outer surface of the rectifier 205 are in smooth transition without parallel acute angles or bumps, so that fluid wind is not blocked when flowing through the outer side of the air guide frame 211. The transition surface between the wind guide frame 211 and the rectifier 205 may be an extrados surface, a straight line, an intrados surface, or the like, and is preferably an extrados surface.

Further, in order to avoid wind resistance at the connection between the wind guide frame 211 and the rectifier 205, as a preferable scheme, the distance from the outer side wall of the wind guide frame 211 to the axis is set to be greater than or equal to the distance from the outer side wall of the rectifier 205 to the axis, that is, the cross section of the rectifier 205 is smaller than or equal to the cross section at the connection between the rectifier 205 and the wind guide frame 211, so as to reduce the resistance of the fluid, and the fluid can smoothly enter the periphery of the rectifier 205. In the specific implementation process, the diameter of the air guide frame 211 is smaller than that of the rectifier 205 due to the selection of the processing technology or the material, and at this time, the fluid flows through the outer wall of the air guide frame 211 and then collides with the connecting surface of the rectifier 205, so that the wind speed is reduced, noise is generated, but the air guide frame can still be used.

Implement the utility model discloses an dryer 200, motor 204 inhale wind from the net 203 that entries, and wind guide frame 211 cooperation rectifier 205 adjusts the fluid, blows off wind from the rectifier 205 outside, and heating element 206 heats wind, and it is powerful through the fluid meeting inflation pressure of heating, blows off by tuyere 207 again, and less with the setting of air outlet 217 on the tuyere 207 simultaneously realizes that the major pressure from the blowout of little air outlet 217, can increase wind pressure and wind speed, again can the noise reduction.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides an air duct, its characterized in that, includes the support of horn mouth form the horn mouth department inboard of support is provided with the air guide frame, the air guide frame comprises closed end and opening end, the open end of air guide frame to support horn mouth one end extends, makes the support with clearance between the air guide frame forms annular air duct, one section in the annular air duct reduces along fluid direction cross section gradually.

2. The air duct of claim 1, wherein a distance from an outer side wall of the air guide frame to an inner wall of the bracket is continuously reduced along a fluid direction.

3. The air duct according to any one of claims 1-2, characterized in that a plurality of uniformly distributed laminar guide wings are disposed on the outer side wall of the air guide frame, and the closed end of the air guide frame is connected to the support through the guide wings to divide the annular air duct into uniformly spaced sections.

4. The air duct according to claim 3, wherein a tubular rectifier is further disposed at the open end of the air guide frame, and one end of the rectifier is hermetically connected to the open end of the air guide frame.

5. The air duct of claim 4, wherein the air guide frame is integrally formed with the rectifier.

6. The air duct of claim 5, wherein the cross section of the rectifier is smaller than or equal to the cross section of the joint of the rectifier and the air guide frame, so as to reduce the resistance of the fluid.

7. The air duct according to any one of claims 4 to 6, wherein a plurality of sheet heating units for heating fluid are further disposed outside the rectifier, and one end of each sheet heating unit is aligned with one end of each guide wing and is consistent in number, so that the fluid can be uniformly heated.

8. The air duct according to claim 7, wherein two side faces of the annular air duct are smooth faces.

9. The air duct according to claim 7, wherein a nozzle is further disposed at the bell mouth of the support, an air outlet is disposed on the nozzle, and the fluid in the annular air duct is exhausted from the air outlet through the outer side surface of the rectifier.

10. The air duct according to claim 9, wherein a cross section of the air outlet end of the annular air duct in the fluid direction is larger than a cross section of the air outlet.