CN111520906A - Heating unit and hair drying device - Google Patents

Abstract

The invention relates to a heating assembly, which comprises a shell and component assemblies arranged on the shell, wherein each component assembly comprises a plurality of components and a plurality of conductive pieces electrically connected with the components; the shell comprises a first pipe part, the heating assembly further comprises a support, and the first pipe part is sleeved outside the support; wherein the conductive member is sandwiched between the first tube part and the holder. According to the invention, the bracket is additionally arranged, the conductive piece is limited between the groove and the first pipe part, the wiring stability can be improved, the assembly is convenient, and the whole volume of the heating assembly can be reduced.

Description

Heating unit and hair drying device

Technical Field

The invention relates to the technical field of handheld appliances, in particular to a heating assembly and a hair drying device.

Background

The hair dryer is mainly used for drying and shaping hair, but also can be used for local drying, heating and physical therapy in laboratories, physical therapy rooms, industrial production, art designing and the like. The heating assembly of the existing hair dryer comprises a shell, a heating element and a plurality of components, wherein the heating element and the components are arranged on the shell, and the shell comprises a first pipe part and a second pipe part located outside the first pipe part. Typically, the connection lines for the heating element and the several components are routed along the inner surface of the first tube portion or along the inner or outer surface of the second tube portion. Because directly arrange the interconnecting link on the inside and outside surface of pipe portion, need adopt the welding or set up extra fixed knot structure at every interconnecting link and come the fixed line, it has caused the increase of the whole volume of heating element, and also causes easily to walk the unstable and the inconvenient condition of assembly and take place.

Disclosure of Invention

The invention aims to provide a heating assembly and a hair drying device which are stable in wiring and convenient to assemble.

In order to achieve the purpose, the invention provides the following technical scheme: a heating assembly comprises a shell and component assemblies arranged on the shell, wherein each component assembly comprises a plurality of components and a plurality of conductive pieces electrically connected with the components; the shell comprises a first pipe part, the heating assembly further comprises a support, and the first pipe part is sleeved outside the support; wherein the conductive member is sandwiched between the first tube part and the holder.

Furthermore, a plurality of grooves are formed in the support, and the conductive pieces are embedded in the grooves.

Further, the support is of a cylindrical structure, and the groove is formed in the axial direction of the support.

Further, the casing still include with first pipe portion concentric second pipe portion that sets up, first pipe portion with be formed with the air supply passageway between the second pipe portion, part components and parts are located air supply passageway's tip and inside.

Further, the support includes the flange that sets up along the outside protrusion of its outer wall circumference, first pipe portion with the flange contacts, the flange restriction first pipe portion axial displacement, air supply passageway includes air supply end and air-out end, the flange includes along air supply end extremely the direction of air-out end chamfer face that leans out, the air current warp get into behind the chamfer face water conservancy diversion in the air supply passageway.

Furthermore, the air supply channel comprises an air supply end and an air outlet end, the component comprises one or more of a thermal fuse and a thermistor, and the thermal fuse and/or the thermistor are/is located at the air outlet end of the air supply channel and connected with the conductive piece.

Further, the conductive pieces comprise a first conductive piece, an interface is arranged at the end part of the first conductive piece, and the end part of the thermistor is connected into the interface.

Further, the components and parts include the temperature controller that sets up along the axial in the air supply passageway, the support includes inside sunken heavy platform, first pipe portion corresponds the heavy platform position has seted up the aversion hole, the temperature controller passes the aversion hole and partial accomodating in the heavy platform.

Furthermore, components and parts are including inlaying and establishing the negative ion emission needle in the slot, the negative ion emission needle has one and is located the transmission pointed end of air-out end.

Further, heater strip assembly still includes heating element and backing sheet, the backing sheet along the outer wall circumference interval of first pipe portion is arranged and is supported the second pipe portion, heating element winds and establishes on the backing sheet, the backing sheet along the through-hole has been seted up to the circumference of first pipe portion.

Further, the flange is provided with a plurality of joint spare along its circumference interval, joint spare with there is the clearance between the support, first pipe portion inserts and establishes in the clearance.

In addition, the invention also provides a hair drying device which comprises the heating assembly.

The invention has the beneficial effects that: according to the invention, the bracket is additionally arranged, the conductive piece is clamped and limited between the bracket and the first pipe part, the wiring stability can be improved, the assembly is convenient, and the overall volume of the heating assembly can be reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the overall structure of the heating assembly of the present invention.

Fig. 2 is a schematic view of the heating assembly of the present invention with the second tube portion and the heating element removed.

Fig. 3 is a schematic view of the heating assembly of the present invention with the second tube portion removed.

Fig. 4 is a schematic cross-sectional view of the heating assembly of fig. 1.

Fig. 5 is a schematic view of the structure of the holder of the heating assembly of the present invention.

Fig. 6 is a schematic structural diagram of the first conductive member of the heating assembly of the present invention.

Fig. 7 is a schematic structural view of the second conductive member of the heating assembly of the present invention.

FIG. 8 is a schematic view of the structure of the negative ion emitting needle of the heating unit according to the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, a heating assembly according to a preferred embodiment of the present invention includes a bracket 2, a housing 1 disposed outside the bracket 2, a heating element 3 disposed in the housing 1, and a component assembly disposed at the housing 1 for controlling a heating temperature and protecting from overheating. The component assembly comprises a plurality of components and a plurality of conductive pieces electrically connected with the components.

Casing 1 includes first pipe portion 11 and the second pipe portion 12 that is located first pipe portion 11 outside, is formed with air supply channel 13 between first pipe portion 11 and the second pipe portion 12, and air supply channel 13 includes air supply end 13a and air-out end 13b, and heating element 3 sets up in air supply channel 13, and wind gets into and blows out by air-out end 13b after heating element 3 heats from air supply end 13 a. In the present embodiment, the first duct portion 11 and the second duct portion 12 are preferably concentrically arranged so that the air supply passage 13 uniformly blows out air. Preferably, the first pipe portion 11 and the second pipe portion 12 are made of an insulating material, and in this embodiment, mica is preferably used.

The housing 1 further comprises a plurality of support sheets 14 connecting the first pipe portion 11 and the second pipe portion 12, the support sheets being arranged circumferentially at intervals along the outer wall of the first pipe portion 11 and supporting the second pipe portion 12. The heating element 3 is embodied as a heating wire, and is wound on the support sheet 14. By providing the plurality of support pieces 14, it is possible to improve the support stability of the heat generating element 3. In this embodiment, the number of the supporting sheets 14 is 10, and in other embodiments, the number of the supporting sheets 14 may be increased or decreased according to actual needs.

As shown in fig. 2, the support piece 14 is provided with a positioning opening 141 for positioning and fixing the heating element 3 on the inner wall side of the second tube portion 12, and the positioning opening 141 has a zigzag structure. Preferably, the support piece 14 is provided with a chamfer 142 near the air outlet end 13b for facilitating the sleeving of the second pipe portion 12. In this embodiment, the supporting sheet 14 is also made of an insulating material, specifically mica. In order to avoid the support sheet 14 from blocking the air supply channel 13, in the present embodiment, the support sheet 14 is a hollow structure. Specifically, the supporting sheets 14 are provided with at least one through hole 147 along the circumferential direction of the first pipe portion, and when the air flow enters the air supply channel 13, the air flows between the adjacent supporting sheets 14 can circulate with each other, so that the air flow can be uniformly and uniformly flowed to the outside.

Referring to fig. 2 and 3, the heating element 3 includes a plurality of coils 31 adjacently disposed in a plurality of turns, the positioning holes 141 are disposed on the supporting sheet 14 at intervals along the same straight line, and the plurality of turns of coils 31 of the heating element 3 are respectively positioned in the plurality of positioning holes 141 of the supporting sheet, so that the plurality of turns of coils 31 of the heating element 3 are spaced from each other, and the restriction of the hot spot on the fluid flowing through the air supply channel 13 is reduced.

As shown in fig. 2 and 4, the bracket 2 has a tubular structure as a whole, the first pipe portion 11 is sleeved outside the bracket 2, and the conductive member is clamped between the first pipe portion 11 and the bracket 2. Through addding support 2, electrically conductive is restricted between support 2 and first pipe portion 11, and it can promote the stability of walking the line, and convenient assembly can reduce the whole volume of heating element simultaneously.

The bracket 2 is provided with an annular flange 21 for supporting the casing 1 at a position close to the air blowing end 13a, and the flange 21 is provided to protrude outward in the circumferential direction along the outer wall of the bracket 2. The first pipe part 11 of the housing 1 is fitted over the bracket 2, and the end surface of the first pipe part 11 is in contact with the flange 21 and restricts axial movement of the first pipe part 11. The outer diameter of the flange 21 gradually shrinks towards the end of the flange 21, so as to form a chamfered surface 211 which inclines outwards along the direction from the air supply end 13a to the air outlet end 13b, and the air flow can enter the air supply channel 13 after being guided by the chamfered surface 211, so that the air flow is smoother. Preferably, the flange 21 is integrally formed with the bracket 2 for ease of manufacture and assembly. As a preferred embodiment, the holder 2 may be provided in an annular structure, and the number of the holders may be plural, and the conductive member is sandwiched between the plural annular holders 2 and the first pipe portion 11.

Preferably, in order to avoid circumferential rotation of the first tube part 11 relative to the bracket 2 and to improve the stable mounting of the support sheet 14, in this embodiment, the support sheet 14 is inserted onto both the bracket 2 and the first tube part 11. Specifically, as shown in fig. 2, the side surface 145 of the support sheet 14 is provided with a convex portion 146 protruding outwards, the outer walls of the first tube portion 11 and the one end of the bracket 2 are both provided with a groove 146a matching with the convex portion 146, when the support sheet 14 is installed, the convex portion 146 is inserted into the grooves 146a of the first tube portion 11 and the bracket 2, and the side surface 145 of the support sheet 14 is attached to the outer wall of the first tube portion 11.

The outer wall of the bracket 2 is provided with first clamping pieces 22, the first clamping pieces 22 are provided with U-shaped first clamping grooves 221, the number of the first clamping pieces 22 is multiple, the first clamping pieces are circumferentially arranged along the outer wall at intervals, and one side, opposite to the convex portion 146, of the support piece 14 is inserted into the first clamping grooves 221. The opening width of the first engaging groove 221 is equal to or slightly greater than the thickness of the supporting piece 14, so that the supporting piece 14 can be easily inserted into the first engaging member 22. Preferably, in order to improve the stability of second pipe portion 12 and be convenient for positioning, it is provided with a plurality of second joint spare 23 to alternate between first joint spare 22, and second joint spare 23 evenly arranges along support 2 outer wall. The second clamping member 23 includes a U-shaped second clamping groove 231 and an abutting portion 232 extending outward to the second tube portion 12, an opening width of the second clamping groove 231 is equal to or slightly larger than a thickness of the support piece 14, and the abutting portion 232 abuts against an end surface of the second tube portion 12. The number of the first clamping members 22 and the second clamping members 23 is the same as that of the support pieces 14, preferably, in this embodiment, the number of the first clamping members 22 is 7, the number of the second clamping members 23 is 3, and in other embodiments, the number of the second clamping members 23 can be adaptively increased or decreased according to actual needs. Through adopting joint spare structure, it can improve the stability and the assembly convenience of backing sheet 14. The first clip member 22 and/or the second clip member 23 may extend from one end of the bracket 2 to the other end or be disposed at one end of the bracket 2 far from the groove 146 a. In this embodiment, the first clamping member 22 and the second clamping member 23 are disposed at one end of the bracket 2 far away from the groove 146a, and are only used for fixing the portion of the supporting sheet 14, and are matched with the protruding portion 146 of the supporting sheet 14 inserted in the groove 146, so that the size of the clamping member can be reduced and the overall structure of the bracket 2 can be simplified while the insertion effect is not affected.

In order to further improve the tight fit between the first tube portion 11 and the bracket 2, as shown in fig. 2 and 4, in this embodiment, preferably, the first clamping member 22 and the second clamping member 23 are formed outside the flange 21, and the first clamping member 22 and/or the second clamping member 23 extend a small section toward the groove 146a, so that a certain installation gap exists between the first clamping member 22 and/or the second clamping member 22 and the bracket 2, the installation gap is the same as or substantially the same as the wall thickness of the first tube portion 11, a third clamping groove 25 is defined between the flange 21, the clamping members and the outer wall of the bracket 2, and the end portion of the first tube portion 11 can be inserted into the third clamping groove 25, so as to limit the radial movement of the first tube portion 11.

A plurality of grooves are formed in the outer wall, in contact with the first pipe portion 11, of the support 2 along the axial direction of the support 2, and the conductive pieces are embedded in the grooves, so that the conductive pieces are installed more stably. Preferably, the conductive member is a metal conductive sheet, which has certain rigidity, so as to support the component.

In this embodiment, as shown in fig. 2 and 5, the components include a thermistor 4, a thermal fuse 5, a temperature controller 6, and a negative ion emitting needle 7. The grooves include a first groove 81, a second groove 82 and a third groove 83, wherein the first grooves 81 are two in number and are adjacently arranged. The conductive members include a first conductive member 91, a second conductive member 92, a third conductive member 93, and a fourth conductive member 94. The thermistor 4 is arranged at the air outlet end 13b of the air supply channel 13, and the thermistor 4 can change resistance along with the change of temperature and can feed back the temperature of air leaving from the heating assembly. The thermistor 4 has two ends electrically connected to the first conductive members 91, respectively, and the first conductive members 91 are disposed in the two first grooves 81, respectively. One end of the first conductive member 91 near the air blowing end 13a is connected to a conductive wire (not shown), and one end near the air outlet end 13b is connected to the thermistor 4. Preferably, as shown in fig. 6, one end of the first conductive member 91 close to the blowing end 13a is bent into a Z-shaped structure, which includes a first abutting portion 911 bent outward to the position of the blowing end 13a, and the first abutting portion 911 may abut against the end surface of the first pipe portion 11; the one end that first electrically conductive piece 91 is close to air-out end 13b leans on the portion 912 including bending to the second of air-out end 13b position department, and the second leans on the portion 912 can support with the other terminal surface of first pipe portion 11, supports the cooperation of portion 912 through first portion 911 and the second of leaning on, when the installation, can be very easy with the spacing of first electrically conductive piece 91 set up on first pipe portion 11, improve assembly efficiency. The end of the second abutting portion 912 is bent to form an inverted U-shaped interface 913, and the connecting end of the thermistor 4 is connected to the interface 913. The thermistor 4 is erected at both ends by adopting a bent structure, so that the position stability of the thermistor 4 can be ensured, and the temperature can be stably detected.

The thermal fuse 5 is disposed at the air outlet end 13b of the air supply channel 13, and two ends of the thermal fuse 5 are electrically connected to the second conductive member 92 and the third conductive member 93, respectively. The second conductive member 92 is disposed in the second groove 82, as shown in fig. 7, two ends of the second conductive member 92 are also provided with an abutting portion, and the specific structure and function thereof are the same as those of the first conductive member 91, and the structure thereof is not described herein again. The third conductive member 93 is arranged along the circumferential direction of the support 2, and is used to connect the thermal fuse 5 and the temperature controller 6 in series, and the other end of the thermal fuse 5 is electrically connected to one end of the third conductive member 93. Preferably, in order to avoid the supporting sheet 14 from limiting the thermal fuse 5, the supporting sheet 14 is provided with a first avoiding groove 143 corresponding to the thermal fuse 5, so that the thermal fuse 5 is not protruded from the housing 1 as a whole, and subsequent assembly is facilitated. Preferably, in order to facilitate the circumferential arrangement of the third conductive member 93, the support piece 14 is provided with a second avoiding groove 144 for the third conductive member 93 to penetrate through, at a position corresponding to the third conductive member 93.

Because the temperature controller 6 needs to detect the temperature in the air supply channel 13 in real time, in order to improve the detection accuracy, the temperature controller 6 is axially arranged in the air supply channel 13. The temperature controller 6 is disposed adjacent to the thermal fuse 5, and one end of the temperature controller is electrically connected to the other end of the third conductive member 93, so that the thermal fuse 5 and the temperature controller 6 are connected in series, thereby providing overheat protection when the temperature controller 6 fails. Preferably, in order to reduce the blockage of the temperature controller 6 to the air supply channel 13, the bracket 2 is provided with an inward concave sinking platform 24 corresponding to the temperature controller 6, the first pipe part 11 is provided with a position avoiding hole 111 corresponding to the position of the sinking platform 24, and the temperature controller 6 passes through the position avoiding hole 111 and is partially accommodated in the sinking platform 24, so that the volume of the temperature controller 6 in the air supply channel 13 can be reduced, the blockage to the wind is reduced, the air outlet flow is increased, and meanwhile, the winding space of the heating element 3 can be increased and the winding processing difficulty is reduced. The other end of the temperature controller 6 is electrically connected to a fourth conductive member 94, and the fourth conductive member 94 is disposed near the air supply end 13a and is connected to the conductive wire to supply power to the temperature controller 6. Preferably, in order to improve the stability of the temperature controller 6, a connection hole 112 is formed in the end portion of the first pipe 11 corresponding to the temperature controller 6, and a fastening member 113 for fixing the temperature controller 6 is disposed in the connection hole 112. In this embodiment, the fasteners are rivets, and in other embodiments, threaded fasteners such as screws and bolts may be used.

The negative ion emitting needle 7 is a strip-shaped sheet structure and is arranged in the third groove 83, and one end of the negative ion emitting needle 7 close to the air supply end 13a is connected with the conductive wire. The two ends of the negative ion emitting needle 7 are also provided with abutting parts, and the specific structure and function thereof are the same as those of the first conductive member 91, and the structure thereof is not described again in the present invention. As shown in fig. 8, one end of the negative ion emitting needle 7 near the air outlet end 13b is provided with an emitting tip 71 bent along the axial direction, and the emitting tip 71 is used for generating negative ions. Preferably, the width of the emission tip 71 is gradually reduced along the direction from the air supply end 13a to the air outlet end 13 b. Specifically, in the present embodiment, the emission tip 71 is cut into a sharp triangular structure, thereby facilitating the enhancement of the negative ion generation amount. By setting the negative ion emitting needle 7 to a strip-shaped sheet structure and embedding it in the third groove 83 against the inner wall of the first pipe portion 11, the space of the heating assembly can be saved by this structure, and the assembling stability can be improved.

The installation process of the invention is as follows: the first conductive piece 91, the second conductive piece 92 and the negative ion emitting needle 7 are tightly attached to the inner wall of the first pipe part 11 and are arranged in the first pipe part 11, the temperature controller 6 is placed into the avoiding hole 111 from inside to outside, the temperature controller 6 is fixed by a fastening piece 113, and the end parts of the first conductive piece 91, the second conductive piece 92 and the negative ion emitting needle 7 can be abutted against the end surface of the first pipe part 11 due to the fact that the two ends of the first conductive piece 91, the second conductive piece 92 and the negative ion emitting needle 7 are bent outwards, and therefore assembly is convenient; then, the bracket 2 is arranged in the first pipe part 11 from the air supply end 13a, wherein the first conductive piece 91, the second conductive piece 92 and the negative ion emission needle 7 are accommodated in respective appointed grooves, and the temperature controller 6 is accommodated in the sinking platform 24, so that the first conductive piece 91, the second conductive piece 92, the negative ion emission needle 7 and the temperature controller 6 can be stably installed in the heating assembly; then, the support sheet 14 is sequentially inserted into the first clamping piece 22 and the second clamping piece 23 of the bracket 2 from the air outlet end 13b, the convex part 146 is embedded in the groove 146a, and the heating element 3 is wound on the support sheet 14; then, the thermistor 4, the thermal fuse 5, the third conductive member 93 and the fourth conductive member 94 are installed in corresponding positions, and the connection ends of the thermistor 4, the thermal fuse 5 and the temperature controller are electrically connected with the corresponding conductive members; finally, the second pipe portion 12 is installed outside the support piece 14 from the air outlet end 13b, and the second pipe portion 12 abuts against the abutting portion 232 of the second clamping piece 23, so that installation is completed.

In addition, the present invention also provides a hair drying device, which includes a handle (not shown), and a main body (not shown) connected to the handle, wherein a heating assembly is disposed in the main body, and the heating assembly is capable of supplying hot wind to the hair drying device to dry hair.

The invention has the beneficial effects that: according to the heating assembly, the support is additionally arranged, so that the heating assembly is stable in wiring and simple and rapid in assembly, the overall volume of the heating assembly can be reduced, and the installation space of the heating assembly is effectively saved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. A heating assembly is characterized by comprising a shell and component assemblies arranged on the shell, wherein each component assembly comprises a plurality of components and a plurality of conductive pieces electrically connected with the components; the shell comprises a first pipe part, the heating assembly further comprises a support, and the first pipe part is sleeved outside the support; wherein the conductive member is sandwiched between the first tube part and the holder.

2. The heating assembly of claim 1, wherein the frame defines a plurality of grooves, and the conductive member is embedded in the grooves.

3. The heating assembly of claim 2, wherein the holder has a cylindrical configuration, and the groove is open in an axial direction of the holder.

4. The heating assembly of claim 1, wherein the housing further comprises a second duct portion concentrically disposed with the first duct portion, an air supply passage is formed between the first duct portion and the second duct portion, and a portion of the component is located at an end portion and inside of the air supply passage.

5. The heating assembly of claim 4, wherein the bracket includes a flange projecting outwardly along a circumferential direction of the outer wall thereof, the first duct portion being in contact with the flange, the flange limiting axial movement of the first duct portion, the air supply passage including an air supply end and an air discharge end, the flange including a chamfered surface inclined outwardly in a direction from the air supply end to the air discharge end, the air flow being guided by the chamfered surface into the air supply passage.

6. The heating assembly as claimed in claim 4, wherein the air supply channel includes an air supply end and an air outlet end, the component includes one or more of a thermal fuse and a thermistor, and the thermal fuse and/or the thermistor is/are located at the air outlet end of the air supply channel and connected to the conductive member.

7. A heating assembly as claimed in claim 6, in which the electrically conductive member comprises a first electrically conductive member having an interface provided at an end thereof, in which interface the end of the thermistor is connected.

8. The heating assembly of claim 4, wherein the component includes a temperature controller axially disposed in the air supply passage, the bracket includes an inwardly recessed platform, the first tube portion has a clearance hole corresponding to the platform, and the temperature controller passes through the clearance hole and is partially received in the platform.

9. The heating assembly of claim 2, wherein the component includes a negative ion emitting pin embedded in the groove, the negative ion emitting pin having an emitting tip at the outlet end.

10. The heating assembly of claim 4, wherein the heating wire assembly further comprises heating elements and support sheets, the support sheets are circumferentially spaced along the outer wall of the first tube portion and support the second tube portion, the heating elements are wound on the support sheets, and the support sheets are provided with through holes along the circumferential direction of the first tube portion.

11. The heating assembly of claim 5, wherein said flange has a plurality of snap members spaced circumferentially thereof, said snap members having gaps with said frame, said first tube portion being inserted in said gaps.

12. A hair drying apparatus comprising a heating assembly as claimed in any one of claims 1 to 11.

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