CN113303582A

CN113303582A - Tuyere structure and hair-dryer

Info

Publication number: CN113303582A
Application number: CN202110650649.8A
Authority: CN
Inventors: 刘鑫; 刘拯; 徐勇; 龙冠军; 聂列清; 石绍齐
Original assignee: Shenzhen Airgle Corp Ltd
Current assignee: Shenzhen Airgle Corp Ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-08-27

Abstract

The invention discloses a tuyere structure and a hair drier, wherein the tuyere structure comprises an outer shell and an inner shell, the outer shell is provided with a first through cavity, and the inner shell is arranged in the first through cavity and is enclosed with the cavity wall of the first through cavity to form a heat insulation annular cavity; the inner shell is provided with a second through cavity, the wall of the second through cavity is provided with at least one heat insulation plate, and each heat insulation plate and the wall of the second through cavity are enclosed to form a first heat insulation cavity. The hair-dryer includes tuyere structure, casing and electric heating element, and the casing is equipped with the installation cavity and with the air outlet of installation cavity intercommunication, and tuyere structure can be dismantled and connect in the air outlet department of casing, and electric heating element locates in the installation cavity of casing. The anti-scalding performance of the air nozzle structure provided by the invention is excellent.

Description

Tuyere structure and hair-dryer

Technical Field

The invention relates to the technical field of blowing equipment, in particular to a tuyere structure and a blower.

Background

Hair dryers have been very commonly used in people's daily life, and are generally used as hair dryers. The outlet end of the hair dryer is typically provided with a nozzle for directing the air to facilitate hair drying and styling.

In the related art, warm air or hot air blown from the air outlet end of the hair dryer heats the air nozzle, so that the temperature of the air nozzle is increased, and when a user uses the hair dryer or within a short time after using the hair dryer, the air nozzle may still have a high temperature, which may cause a user to be burned when contacting the air nozzle.

Disclosure of Invention

The invention mainly aims to provide a tuyere structure and aims to improve the anti-scalding performance of the tuyere structure.

In order to achieve the purpose, the invention provides a tuyere structure which comprises an outer shell and an inner shell, wherein the outer shell is provided with a first through cavity, and the inner shell is arranged in the first through cavity and is enclosed with the cavity wall of the first through cavity to form a heat insulation annular cavity;

the inner shell is provided with a second through cavity, the wall of the second through cavity is provided with at least one heat insulation plate, and each heat insulation plate and the wall of the second through cavity are enclosed to form a first heat insulation cavity.

Optionally, the tuyere structure further comprises a heat insulator, and the heat insulator is arranged in the heat insulation cavity.

In an embodiment of the invention, a side wall of each of the first insulating chambers is provided with a first through hole, and the first through hole is used for allowing the insulating material to pass through.

Optionally, a second port communicated with the second through cavity is arranged on the cavity wall of each first heat insulation cavity, and the second port extends towards the first port and is communicated with the first port;

the heat insulation object is provided with a limiting convex part, and the limiting convex part penetrates through the first through opening and is clamped in the second through opening.

Optionally, the side wall of the second through cavity has two first arc sections and two first straight sections, two ends of each first arc section are respectively connected with the two first straight sections, and two ends of each first straight section are connected with the two first arc sections, so that the two first arc sections and the two first straight sections are connected into a ring;

each heat insulation plate is connected with the two first straight sections and forms a first heat insulation cavity together with the two first straight sections and the first arc section in an enclosing mode.

Meanwhile, the invention also provides another tuyere structure which comprises an outer shell and an inner shell, wherein the outer shell is provided with a first through cavity, and the inner shell is arranged in the first through cavity and is enclosed with the cavity wall of the first through cavity to form a heat insulation annular cavity;

the inner shell is provided with a second through cavity, the wall of the heat insulation annular cavity is provided with at least one heat insulation plate, and each heat insulation plate and the wall of the heat insulation annular cavity are enclosed to form a second heat insulation cavity.

In an embodiment of the present invention, the side wall of the first through cavity has two second arc segments and two second straight segments, two ends of each second arc segment are respectively connected to the two second straight segments, and two ends of each second straight segment are connected to the two second arc segments, so that the two second arc segments and the two second straight segments are connected into a ring;

each heat insulation plate is connected with the two second straight sections and forms a second heat insulation cavity together with the two second straight sections and the second arc section in an enclosing mode.

Furthermore, the present invention provides another tuyere structure, which includes:

a housing having a first through cavity;

the inner shell is arranged in the first through cavity and is enclosed with the cavity wall of the first through cavity to form a heat insulation annular cavity; the inner shell is provided with a second through cavity; and

the heat insulation plates are arranged on the cavity wall of the second through cavity and enclose the cavity wall of the second through cavity to form at least one first heat insulation cavity; the at least one heat insulation plate is arranged on the cavity wall of the heat insulation annular cavity and encloses with the cavity wall of the heat insulation annular cavity to form at least one second heat insulation cavity.

Optionally, the wall of the first heat insulation cavity is provided with an airflow port communicated with the heat insulation annular cavity.

Furthermore, the invention proposes a hair dryer comprising:

any of the tuyere structures described above;

the shell is provided with an installation cavity and an air outlet communicated with the installation cavity, the outer shell and/or the inner shell of the air nozzle structure are/is detachably connected to the air outlet, and the air outlet is communicated with the second through cavity of the air nozzle structure; and

and the electric heating assembly is arranged in the mounting cavity and used for blowing air to the air outlet.

The tuyere structure in the technical scheme of the invention comprises an outer shell and an inner shell, wherein the outer shell is provided with a first through cavity, and the inner shell is arranged in the first through cavity and is enclosed with the cavity wall of the first through cavity to form a heat insulation annular cavity; the inner shell is provided with a second through cavity, the wall of the second through cavity is provided with at least one heat insulation plate, and each heat insulation plate and the wall of the second through cavity are enclosed to form a first heat insulation cavity. Therefore, when the air nozzle structure is connected to the blower main body for use, hot air flows in the second through cavity, the hot air is in contact with at least one heat insulation plate in the second through cavity, under the heat insulation effect of the heat insulation plate, the first heat insulation cavity formed by enclosing the heat insulation plate and the wall of the second through cavity isolates the hot air from at least part of the wall of the second through cavity, the temperature rise of the inner shell is slowed down, and the first heat insulation effect of the air nozzle structure is further realized. When the inner shell heaies up, with the help of the thermal-insulated ring chamber between inner shell and the shell, the heat on the inner shell will use the air in the thermal-insulated ring chamber more as the medium to the shell heat radiation to make direct heat transfer reduce by a wide margin between inner shell and the shell, the intensification of shell will be slowed down, and then realizes the second thermal-insulated effect of this tuyere structure. Through foretell dual thermal-insulated effect, promoted the scald-proof performance of tuyere structure, make this tuyere structure when using, the hot gas flow in the second logical cavity will not lead to the high temperature of shell to by the scald when can preventing user and shell contact.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of a tuyere structure of the present invention in a first embodiment;

FIG. 2 is an exploded view of the nozzle structure of FIG. 1;

FIG. 3 is a schematic structural view of a tuyere structure of the present invention in a second embodiment;

fig. 4 is a schematic structural view of a tuyere structure of the present invention in a third embodiment.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout this document, "and/or" is meant to include three juxtaposed aspects, exemplified by "A and/or B," including either the A aspect, or the B aspect, or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In a first embodiment of the invention:

referring to fig. 1 and fig. 2, the present embodiment provides a tuyere structure, which includes an outer shell 1 and an inner shell 2, where the outer shell 1 has a first through cavity 11, and the inner shell 2 is disposed in the first through cavity 11 and encloses with a cavity wall of the first through cavity 11 to form an insulating annular cavity 3; the inner shell 2 is provided with a second through cavity 21, the cavity wall of the second through cavity 21 is provided with at least one heat insulation plate 5, and each heat insulation plate 5 and the cavity wall of the second through cavity 21 enclose to form a first heat insulation cavity 22.

In this embodiment, inner shell 2 nestification sets up in the first chamber 11 that leads to of shell 1, and accessible joint, grafting etc. can dismantle the connected mode and connect between inner shell 2 and the shell 1, for example, the lateral wall of inner shell 2 is equipped with the buckle, and the first chamber wall that leads to chamber 11 of shell 1 is equipped with the draw-in groove, and inner shell 2 is located first chamber 11 that leads to, and the buckle joint is in the draw-in groove.

First logical chamber 11 is for the access structure who link up shell 1, and the second leads to the access structure of chamber 21 for running through inner shell 2, and inner shell 2 sets up in first logical chamber 11 and with the chamber wall fixed connection in first logical chamber 11, or connects according to above-mentioned detachable mode, forms thermal-insulated ring chamber 3 between inner shell 2 and the shell 1 this moment, and thermal-insulated ring chamber 3 is for the cavity structures who encircles the periphery of inner shell 2. The heat insulation annular cavity 3 can be a closed cavity structure, for example, the outer wall of the inner shell 2 is provided with two connecting parts which are spaced and oppositely arranged, the two connecting parts are connected with the cavity wall of the first through cavity 11, and the outer wall of the inner shell 2, the cavity wall of the first through cavity 11 and the two connecting parts are enclosed to form the heat insulation annular cavity 3; the connecting part includes, but is not limited to, a protruding structure integrally formed with the inner casing 2 or a connecting block separately connected to the outer wall of the inner casing 2. At this time, the heat insulation ring cavity 3 may be a vacuum cavity to block the heat transfer between the inner shell 2 and the outer shell 1, so as to prevent the user from being scalded by the over-high temperature of the outer shell 1 when the hot air flows through the second through cavity 21. The heat insulation ring cavity 3 can also be a non-closed cavity structure, for example, an air port is arranged on the cavity wall of the heat insulation ring cavity 3, and the air port is communicated with the heat insulation ring cavity 3 and the external environment, so that the heat on the inner shell 2 can be radiated and transferred to the external environment through the air in the heat insulation ring cavity 3 and the air port, the heat dissipation of the inner shell 2 and the outer shell 1 is facilitated, and the user is prevented from being scalded due to the overhigh temperature of the outer shell 1.

When only one heat insulation plate 5 is arranged on the cavity wall of the second through cavity 21, the shape of the heat insulation plate 5 can be matched with the shape of the inner peripheral wall of the second through cavity 21, so that when the heat insulation plate 5 is connected with the cavity wall of the second through cavity 21, the heat insulation plate 5 and the cavity wall of the second through cavity 21 are enclosed to form an annular cavity, the heat insulation annular cavity 3 is annularly arranged at the periphery of the annular cavity, at the moment, the heat conduction of hot air in the second through cavity 21 can be blocked through the annular cavity and the two annular cavities of the heat insulation annular cavity 3, and the phenomenon that a user is scalded due to overhigh temperature of the shell 1 is avoided. When the plurality of heat insulation plates 5 are arranged on the cavity wall of the second through cavity 21, the plurality of heat insulation plates 5 can be sequentially spliced or connected and completely cover the inner peripheral wall of the second through cavity 21, or the plurality of heat insulation plates 5 are arranged on the cavity wall of the second through cavity 21 at intervals. Each thermal shield 5 can cooperate with the wall of the second through cavity 21 and enclose a first thermal shield cavity 22. A plurality of heat insulating boards 5 with the interval and evenly set up on the chamber wall that the second leads to chamber 21 suitable, so the hot gas flow that a plurality of heat insulating boards 5 of accessible lead to the chamber 21 to the second carries out even separation, makes the temperature at each position of inner shell 2 and shell 1 balanced, avoids appearing the local overheated condition of shell 1, guarantees that each position of shell 1 can both maintain the lower temperature state, improves the scald preventing performance of this tuyere structure. The heat insulation plate 5 can be made of heat conductive materials such as plastic and metal alloy, and can also be made of heat resistant materials such as silica, mica and vacuum plate, so that the isolation plate has certain heat resistant and heat insulation effects, and the scald-proof performance of the tuyere structure is improved. The heat insulation plate 5 can be integrally formed with the inner shell 2, or the heat insulation plate 5 is connected with the inner shell 2 in a plugging, clamping and other modes; for example, at least one slot is disposed in the second through cavity 21 of the inner casing 2 along the extending direction of the second through cavity 21, and each heat insulation board 5 is inserted into one slot to detachably connect the heat insulation board 5 and the inner casing 2.

When the tuyere structure is connected to a main body of a blower for use, hot air flows in the second through cavity 21, the hot air is contacted with at least one heat insulation plate 5 in the second through cavity 21, under the heat insulation effect of the heat insulation plate 5, the first heat insulation cavity 22 formed by enclosing the heat insulation plate 5 and the cavity wall of the second through cavity 21 isolates at least partial cavity walls of the hot air and the second through cavity 21, the temperature rise of the inner shell 2 is slowed down, and then the first heavy heat insulation effect of the tuyere structure is realized. When the inner shell 2 is heated up, by means of the heat insulation annular cavity 3 between the inner shell 2 and the outer shell 1, more heat on the inner shell 2 is radiated to the outer shell 1 by taking the air in the heat insulation annular cavity 3 as a medium, so that the direct heat transfer between the inner shell 2 and the outer shell 1 is greatly reduced, the heating up of the outer shell 1 is slowed down, and the secondary heat insulation effect of the tuyere structure is further realized. Through foretell dual thermal-insulated effect, promoted the scald-proof performance of tuyere structure, make this tuyere structure when using, the hot gas flow in the second logical chamber 21 will not lead to the high temperature of shell 1 to by the scald when can preventing user and shell 1 contact.

Optionally, as shown in fig. 2, the tuyere structure further includes a heat insulator 4, and the heat insulator 4 is disposed in the heat insulation cavity.

In this embodiment, the heat insulator 4 is used for blocking heat in the second through cavity 21 from being transferred to the inner shell 2, specifically, when the second through cavity 21 is flowing hot air, the hot air flow heats the heat insulating plate 5, the heat insulating plate 5 itself can be made of heat insulating material, and the heat insulating plate 5 can perform first heavy blocking on the heat carried by the hot air flow, and the heat insulator 4 in the second first heat insulating cavity 22 can perform second heavy blocking on the heat carried by the hot air flow, so that the hot air flow can be prevented from excessively transferring the heat to the outer shell 1, and the temperature of the outer shell 1 is prevented from being too high. The heat insulation material 4 may be glass fiber, silica block, mica block, etc. with heat insulation effect.

Alternatively, as shown in fig. 2, the sidewall of each first insulating chamber 22 is provided with a first through opening 23, and the first through opening 23 is used for the passage of the insulating material 4.

In this embodiment, the first opening 23 is for the heat insulator 4 to pass through, and the heat insulator 4 can be put into the first heat insulating chamber 22 through the first through hole, and the heat insulator 4 is clamped and limited by the first heat insulating chamber 22, so that the heat insulator 4 is fixed. The first port 23 is also used to allow hot air to circulate through the first insulated chamber 22 when the insulator 4 is not placed in the first insulated chamber 22, thereby dissipating heat from the first insulated chamber 22. For example, the second through cavity 21 may be a channel structure penetrating through the inner shell 2, the second through cavity 21 has two openings, the first through opening 23 may be disposed adjacent to and opposite to one of the openings of the second through cavity 21, and the first through opening 23 is communicated with the first insulating cavity 22; thus, when the hot air flow in the second through cavity 21 raises the temperature of the air in the heat insulation plate 5 and the first heat insulation cavity 22, the hot air in the first heat insulation cavity 22 can flow out through the first through hole 23, so as to provide conditions for air exchange between the inside of the first heat insulation cavity 22 and the external environment, and avoid the air in the first heat insulation cavity 22 from being heated up too fast.

Optionally, as shown in fig. 1 and 2, the wall of each first insulating chamber 22 is provided with a second port 24 communicating with the second through chamber 21, and the second port 24 extends towards the first port 23 and communicates with the first port 23; the heat insulation 4 is provided with a limit convex part 41, and the limit convex part 41 penetrates through the first through opening 23 and is clamped in the second through opening 24.

In this embodiment, the first through opening 23 is communicated with the second through opening 24, and a plane where the first through opening 23 is located and a plane where the second through opening 24 is located are arranged at an included angle, for example, at a right angle. When the heat insulator 4 passes through the first opening 23 and enters the first heat insulation cavity 22, the limiting convex part 41 moves along the extending direction of the second opening 24 and is clamped in the second opening 24; therefore, the heat insulator 4 is accommodated and limited in the first heat insulation cavity 22, and the limiting convex part 41 on the heat insulator 4 is clamped in the second through hole 24, so that the heat insulator 4 is fixedly installed in the first heat insulation cavity 22. The limiting convex part 41 can partially protrude out of the second opening 24, so that when the heat insulator 4 is detached from the second heat insulation cavity 12, only the part of the limiting convex part 41 protruding out of the second opening 24 needs to be stirred, the limiting convex part 41 moves along the second opening 24, and the heat insulator 4 is driven to slide out of the first opening 23 from the first heat insulator 4.

Optionally, as shown in fig. 1 and fig. 2, the sidewall of the second through cavity 21 has two first arc segments 211 and two first straight segments 212, two ends of each first arc segment 211 are respectively connected to the two first straight segments 212, and two ends of each first straight segment 212 are connected to the two first arc segments 211, so that the two first arc segments 211 and the two first straight segments 212 are connected to form a ring; each heat shield 5 connects two first straight sections 212 and encloses two first straight sections 212 and a first arc section 211 to form a first heat shield cavity 22.

In this embodiment, the first straight section 212 is a straight extending portion on the sidewall of the second through cavity 21, the first arc section 211 is an arc extending portion on the sidewall of the second through cavity 21, the two heat insulation boards 5 are respectively disposed adjacent to the two first arc sections 211, so that the two first heat insulation cavities 22 are formed at two opposite ends of the inner shell 2, when hot air flows are circulated in the second through cavity 21 of the inner shell 2, because the hot air flows can horizontally circulate and quickly diffuse along the first straight section 212, the hot air flows easily form backflow and are not easily diffused when circulating along the first arc sections 211, the two first heat insulation cavities 22 are disposed adjacent to the arc sections, thereby preventing the hot air flows from converging and heating two ends of the inner shell 2 when flowing along the first arc sections 211, and causing two ends of the inner shell 2 to be heated too much and scalded.

The heat shield 5 may include a first connecting section and a second connecting section arranged at an included angle, the first connecting section being located between and connected to the two first straight sections 212. The second connecting section connects the first connecting section and the first arc section 211, so that the first connecting section, the second connecting section, the first arc section 211 and the two second straight sections 112 enclose to form a first heat insulation cavity 22 with an opening, and the opening is formed between the first connecting section and the first arc section 211 connected with the second connecting section. If the air flow gushing side in the air flow flowing direction in the second channel is used as the air inlet side of the second channel, and the gushing side of the air flow in the air flow flowing direction in the second channel is used as the air outlet side of the second channel, the opening is positioned on the air outlet side of the second through cavity 21, and the plane where the opening is positioned is vertical to the air flow direction, so that the hot air flow in the second through cavity 21 is prevented from flowing into the first heat insulation cavity 22 through the opening, the temperature of the air in the first heat insulation cavity 22 is raised, and the heat insulation effect of the first heat insulation cavity 22 is influenced.

In a second embodiment of the invention:

as shown in fig. 3, the present embodiment provides a tuyere structure, which includes an outer shell 1 and an inner shell 2, where the outer shell 1 has a first through cavity 11, and the inner shell 2 is disposed in the first through cavity 11 and encloses with a cavity wall of the first through cavity 11 to form an insulating annular cavity 3; the shell is provided with a second through cavity 21, the cavity wall of the heat insulation annular cavity 3 is provided with at least one heat insulation plate 5, and each heat insulation plate 5 and the cavity wall of the heat insulation annular cavity 3 are enclosed to form a second heat insulation cavity 12.

In this embodiment, different from the first embodiment in which the heat insulation board 5 is disposed on the inner shell 2, the heat insulation board 5 in this embodiment is disposed on one side of the outer shell 1 or the inner shell 2 facing the outer shell 1, and each heat insulation board 5 and the cavity wall of the first through cavity 11 in the outer shell 1 enclose to form a second heat insulation cavity 12. The structure and connection mode of the inner shell 2 and the outer shell 1 can be referred to the first embodiment, and are not described herein again.

When one and only one heat insulation plate 5 is arranged on the wall of the first through cavity 11, the shape of the heat insulation plate 5 can be matched with the shape of the inner peripheral wall of the first through cavity 11, so that when the heat insulation plate 5 is connected with the wall of the first through cavity 11, the heat insulation plate 5 divides the heat insulation annular cavity 3 into two annular cavities, and heat transfer between the inner shell 2 and the outer shell 1 can be blocked through the two annular cavities, so that a user is prevented from being scalded due to overhigh temperature of the outer shell 1. When a plurality of heat insulating boards 5 are arranged on the wall of the first through cavity 11, the plurality of heat insulating boards 5 can be sequentially spliced or connected and completely cover the inner peripheral wall of the first through cavity 11, or the plurality of heat insulating boards 5 are arranged on the wall of the first through cavity 11 at intervals. Each thermal shield 5 can cooperate with and enclose the walls of the first through cavity 11 to form a first thermally insulating cavity 22. A plurality of heat insulating boards 5 with the interval and evenly set up on the chamber wall of first logical chamber 11 for suitable, so a plurality of heat insulating boards of accessible 5 radiate the heat to shell 1 to inner shell 2 and carry out even separation, make the temperature at each position on the shell 1 balanced, avoid appearing the local overheated condition of shell 1, improve the performance of preventing scalding of this tuyere structure. The heat insulation plate 5 can be made of heat conductive materials such as plastic and metal alloy, and can also be made of heat resistant materials such as silica, mica and vacuum plate, so that the isolation plate has certain heat resistant and heat insulation effects, and the scald-proof performance of the tuyere structure is improved. The heat insulation plate 5 can be integrally formed with the outer shell 1, or the heat insulation plate 5 is connected with the inner shell 2 in a plugging, clamping and other modes; for example, at least one slot is arranged in the first through cavity 11 of the housing 1 along the extending direction of the first through cavity 11, and each heat insulation board 5 is inserted into one slot, so as to realize the detachable connection between the heat insulation board 5 and the housing 1.

This tuyere structural connection is when hair-dryer main part uses, it has the hot gas flow to lead to the intracavity 21 circulation at the second, the contact of hot gas flow inner shell 2 makes inner shell 2 intensification, heat on the inner shell 2 radiates to thermal-insulated ring chamber 3 between inner shell 2 and the shell 1, under the thermal-insulated effect of heat insulating board 5, the second that encloses with the help of heat insulating board 5 and first logical 11 chamber walls of chamber and close the formation is thermal-insulated chamber 12 keeps apart inner shell 2 and shell 1 simultaneously, the heat transfer between inner shell 2 and the shell 1 reduces by a wide margin, avoid 1 high temperature in shell, thereby can prevent that the user from being scalded when contacting with shell 1.

Optionally, as shown in fig. 3, the side wall of the first through cavity 11 has two second arc segments 111 and two second straight segments 112, two ends of each second arc segment 111 are respectively connected to the two second straight segments 112, and two ends of each second straight segment 112 are connected to the two second arc segments 111, so that the two second arc segments 111 and the two second straight segments 112 are connected into a ring; each heat insulation plate 5 is connected with two second straight sections 112, and forms a second heat insulation cavity 12 with the two second straight sections 112 and a second arc section 111 in an enclosing way.

In this embodiment, the second straight section 112 is a straight extending portion on the sidewall of the first through cavity 11, the second arc section 111 is an arc extending portion on the sidewall of the first through cavity 11, the two heat insulation boards 5 are respectively disposed adjacent to the two second arc sections 111, so that the two second heat insulation cavities 12 are formed at the two opposite ends of the housing 1, and thus when hot air flows are circulated in the first through cavity 11 of the housing 1, because the hot air flows can horizontally circulate and quickly diffuse along the second straight section 112, the hot air flows easily form backflow and are not easily diffused when circulating along the second arc section 111, and the two second heat insulation cavities 12 are disposed adjacent to the arc sections, so that it is possible to prevent the hot air flows from converging and heating the two ends of the housing 1 when flowing along the second arc sections 111, and thus the two ends of the housing 1 are heated too much and scalded.

The heat shield 5 may include a first connecting section and a second connecting section arranged at an included angle, the first connecting section being located between and connected to the two second straight sections 112. The second connecting section connects the first connecting section and the second arc section 111, so that the first connecting section, the second arc section 111 and the two second straight sections 112 enclose to form a second heat insulation cavity 12 with an opening, and the opening is formed between the first connecting section and the second arc section 111 connected with the second connecting section. If the air flow gushing side in the air flow flowing direction in the first channel is used as the air inlet side of the first channel, and the gushing side of the air flow in the air flow flowing direction in the first channel is used as the air outlet side of the first channel, the opening is arranged close to the air outlet side, and the plane where the opening is located is perpendicular to the air flow direction, so that the hot air in the heat insulation annular cavity 3 is prevented from flowing into the second heat insulation cavity 12 through the opening, the temperature of the air in the second heat insulation cavity 12 is raised, and the heat insulation effect of the second heat insulation cavity 12 is influenced.

In a third embodiment of the invention:

as shown in fig. 4, the present embodiment proposes a tuyere structure including an outer casing 1, an inner casing 2, and a plurality of heat insulating plates 5, the outer casing 1 having a first through cavity 11; the inner shell 2 is arranged in the first through cavity 11 and forms a heat insulation annular cavity 3 with the wall of the first through cavity 11 in an enclosing manner; the inner shell 2 has a second through cavity 21; the at least one heat insulation plate 5 is arranged on the cavity wall of the second through cavity 21 and encloses with the cavity wall of the second through cavity 21 to form at least one first heat insulation cavity 22; at least one heat insulation plate 5 is arranged on the cavity wall of the heat insulation annular cavity 3 and encloses with the cavity wall of the heat insulation annular cavity 3 to form at least one second heat insulation cavity 12.

In this embodiment, different from the arrangement of the heat insulation board 5 in the first and second embodiments, the heat insulation board 5 in this embodiment is arranged in both the first through cavity 11 and the heat insulation ring cavity 3, and when the heat insulation board 5 is arranged in the first through cavity 11, it can be connected with the housing; when the heat insulation plate 5 is arranged in the heat insulation annular cavity 3, the heat insulation plate can be connected with the outer shell 1 or the inner shell 2, at this time, at least one heat insulation plate 5 is respectively arranged on the inner shell 2 and the outer shell 1, or at least one heat insulation plate 5 is respectively arranged on the inner side wall and the outer side wall of the inner shell 2. It should be noted that this embodiment includes all the technical solutions in the first embodiment and the second embodiment, and thus at least has all the advantages brought by the technical solutions in the first embodiment and the second embodiment, and details are not repeated herein. In addition, because the first insulating cavity 22 and the second insulating cavity 12 are arranged, when hot air flows through the second through cavity 21, heat carried by the hot air flows is triple-blocked by the first insulating cavity 22, the insulating ring cavity 3 and the second insulating cavity 12, and finally, the heat which can be transferred to the housing 1 is further reduced, so that the heat-insulating and scald-preventing effects which can be realized by the tuyere structure in the embodiment are also better than those of the first embodiment and the second embodiment.

Optionally, as shown in fig. 4, the wall of the first insulating chamber 22 is provided with an air flow port (not shown) communicating with the insulating ring chamber 3.

In this embodiment, the airflow opening may be a through hole structure penetrating through the inner casing 2, and the cross-sectional shape of the airflow opening includes, but is not limited to, a long strip shape, a kidney shape, a circular shape, and a polygonal shape, and the second heat-insulating cavity 12 and the heat-insulating ring cavity 3 are communicated through the airflow opening, so that after the inner casing 2 is heated and heated, heat on the inner casing 2 is radiated into the first heat-insulating cavity 22, on one hand, air in the first heat-insulating cavity 22 is heated to expand and flow into the heat-insulating ring cavity 3, and simultaneously takes away heat on the inner casing 2; on the other hand, the air in the heat insulation annular cavity 3 is contacted with the inner shell 2 to heat up, and simultaneously, the heat on the inner shell 2 is also taken away; when the circulation of air in the thermal-insulated ring chamber 3 circulates, constantly take away the heat on the inner shell 2 to opening flow direction external through thermal-insulated ring chamber 3 and external intercommunication, the air in the thermal-insulated ring chamber 3 can keep the convection current with external environment's air, and heat transfer continuously, thereby make the whole temperature of the air in the thermal-insulated ring chamber 3 unlikely too high, with this avoid keeping apart the air of ring intracavity and to the too much heat of shell 1 transmission, be favorable to reducing the temperature of shell 1.

The invention further provides a hair dryer, which comprises a shell, an electric heating assembly and the air nozzle structure in any embodiment, wherein the specific structure of the air nozzle structure refers to the embodiment. The shell is provided with an installation cavity and an air outlet communicated with the installation cavity, the outer shell 1 and/or the inner shell 2 are/is detachably connected to the air outlet, and the air outlet is communicated with the second through cavity 21; the electric heating component is arranged in the mounting cavity and used for blowing air to the air outlet. The outer shell 1 and/or the inner shell 2 can be detachably connected with the shell in a screwing mode, a clamping mode, an inserting mode and the like, and after the outer shell 1 and/or the inner shell 2 are connected with the shell, the second through cavity 21 is communicated with the air outlet. The electric heating component can comprise a resistance wire and a fan, the resistance wire generates heat and heats air when being connected with a power supply, the fan blows out the heated hot air from the air outlet, and the hot air flows out along the second through cavity 21 to blow air.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The tuyere structure is characterized by comprising an outer shell and an inner shell, wherein the outer shell is provided with a first through cavity, and the inner shell is arranged in the first through cavity and is enclosed with the cavity wall of the first through cavity to form a heat insulation annular cavity;

2. The tuyere structure of claim 1, further comprising insulation disposed within the insulating cavity.

3. The tuyere structure of claim 2, wherein a side wall of each of the first insulating chambers is provided with a first port for passing the insulator therethrough.

4. The tuyere structure of claim 3, wherein a wall of each of the first insulating chambers is provided with a second port communicating with the second through chamber, the second port extending toward the first port and communicating with the first port;

5. The tuyere structure of any one of claims 1 to 4, wherein the side wall of the second through cavity has two first arc sections and two first straight sections, two ends of each first arc section are respectively connected with the two first straight sections, and two ends of each first straight section are connected with the two first arc sections, so that the two first arc sections and the two first straight sections are connected in a ring;

6. The tuyere structure is characterized by comprising an outer shell and an inner shell, wherein the outer shell is provided with a first through cavity, and the inner shell is arranged in the first through cavity and is enclosed with the cavity wall of the first through cavity to form a heat insulation annular cavity;

7. The tuyere structure of claim 6, wherein the side wall of the first through cavity has two second arc sections and two second straight sections, two ends of each second arc section are respectively connected with the two second straight sections, and two ends of each second straight section are respectively connected with the two second arc sections, so that the two second arc sections and the two second straight sections are connected into a ring;

8. A tuyere structure, characterized in that the tuyere structure comprises:

a housing having a first through cavity;

9. The tuyere structure of claim 8, wherein a wall of the first insulating chamber is provided with an air flow port communicating with the insulating ring chamber.

10. A hair dryer, characterized in that it comprises:

the tuyere structure of any one of claims 1 to 9;