Heater for hair drier

Abstract

The heater comprises a support and a heating piece, the heating piece is arranged on the support in a surrounding mode in the circumferential direction of the support, the heating piece is in a strip shape and comprises a planar main body part and linear side parts, and the side parts comprise the windward side part and the leeward side part arranged back to back. The windward side part faces an air inlet of the heater, and the leeward side part faces an air outlet of the heater. The strip-shaped heating element is adopted, the heating element comprises the linear windward side part and the leeward side part which are arranged towards the air inlet and the air outlet of the heater respectively, compared with a conventional cylindrical heating wire, the windward side part and the leeward side part are linear and have extremely small surface area, airflow resistance in the heater is better reduced, and the heating effect is improved. Meanwhile, the planar main body part has a larger heating surface area, so that the airflow flowing through the surface of the planar main body part can be fully heated, and the heating efficiency of the heater and the hot air outlet efficiency of the heater are improved.

Description

Technical Field

[0001] The utility model relates to the field of small household appliances, in particular to a heater for a hair dryer. Background Art

[0002] Heaters commonly used in small appliances such as hair dryers and dryers generally include heating wires, which are cylindrical in structure. When air flows through the heating wires, the windward area of ​​the heating wires relative to the air flow is large, which is not conducive to reducing wind resistance and affects the efficiency of the appliance to produce hot air. In addition, the surface area of ​​the heating wire is limited, and the contact area with the air is relatively small, resulting in a reduction in the efficiency of hot air generation, which also affects the efficiency of the appliance to produce hot air.

[0003] In the prior art, for example, patent CN113040503A discloses a heater which uses a conventional cylindrical heating wire (circular in cross section) and has the above-described problems, resulting in low efficiency in generating hot air in the equipment using the heater. Utility Model Content

[0004] In order to solve the technical problems in the prior art that the large windward area of ​​the cylindrical heating wire leads to large wind resistance, and the small surface area of ​​the cylindrical heating wire leads to low hot air output efficiency, the utility model provides a heater for a hair dryer, which adopts a strip-shaped heating element, reduces the wind resistance by reducing the windward area of ​​the heating element, and increases the surface area of ​​the heating element to improve the hot air output efficiency.

[0005] The utility model discloses a heater for a hair dryer, comprising a bracket and a heating element, wherein the heating element is arranged around the bracket along the circumference of the bracket, the heating element is in a strip shape, the heating element comprises a planar main body and a linear side portion, the side portion comprises a windward side portion and a leeward side portion arranged opposite to the windward side portion, the windward side portion is arranged toward the air inlet of the heater, and the leeward side portion is arranged toward the air outlet of the heater.

[0006] The heater for the hair dryer of the utility model also has the following additional technical features:

[0007] The heating element comprises a plurality of protrusions and a plurality of recesses, and the plurality of protrusions and the plurality of recesses are alternately arranged along the circumference of the bracket to form a wave structure; or, the heating element comprises a plurality of protrusions and a plurality of recesses, at least some of the protrusions are in a wave structure, and / or at least some of the recesses are in a wave structure; or, the main body is provided with a convex rib extending along the length direction of the main body, and the convex rib arches from one side surface of the main body toward the other side surface opposite to the one side surface.

[0008] The windward side is arranged opposite to the air inlet of the heater, and the leeward side is arranged opposite to the air outlet of the heater; the thickness of the windward side and / or the leeward side is smaller than the width of the main body; or, the windward side is provided with a wind guiding slope.

[0009] The heating element comprises an inner heating element arranged along the circumference of the bracket and an outer heating element located outside the inner heating element, a gap is arranged between the inner heating element and the outer heating element, the bracket comprises a plurality of first wings and a plurality of second wings, the plurality of first wings and the plurality of second wings are alternately arranged along the circumference of the bracket, the length of the first wing is smaller than the length of the second wing, the inner heating element is wound around the plurality of first wings, and the outer heating element is wound around the plurality of second wings.

[0010] The inner heating element is formed by spirally winding a heating element along the outer end of the first wing, and the outer heating element is formed by spirally winding another heating element along the outer end of the second wing. The winding direction of the inner heating element is opposite to that of the outer heating element.

[0011] The bracket comprises a plurality of fins, the plurality of fins are cross-jointed to form a plurality of sub-fins spaced apart along the circumference of the bracket, and the heat generating element is wound around the plurality of sub-fins.

[0012] The bracket includes an inner tube and a plurality of fins extending radially outward along the outer wall of the inner tube, the heating element is wound around the plurality of fins, and one end of the inner tube facing the air inlet is closed and provided with an arc-shaped air guide portion.

[0013] The bracket includes a plurality of fins for surrounding the heating element, and the outer ends of the fins are provided with slots for accommodating the heating element, and the top surface of the heating element is arranged lower than the top end of the slot.

[0014] The heater further comprises a shell, the bracket is arranged in the shell, and the top end of the slot abuts against the inner wall of the shell.

[0015] The heater further comprises a fuse and a thermostat which are arranged on the bracket. The fuse and the thermostat both extend along the axial direction of the bracket and are consistent with the flow direction of the airflow.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0017] 1. The heater for a hair dryer of the utility model adopts a strip-shaped heating element, which includes a linear windward side portion and a leeward side portion, and is respectively arranged toward the air inlet and the air outlet of the heater. Compared with the conventional cylindrical heating wire, the linear windward side portion and the leeward side portion have a very small surface area, which better reduces the airflow resistance in the heater and facilitates the flow of air in the heater to reduce noise. At the same time, the planar main body portion has a larger heating surface area, which can fully heat the airflow passing through its surface, thereby improving the heating efficiency of the heater and the hot air outlet efficiency of the heater.

[0018] 2. As a preferred embodiment, the heating element includes a plurality of protrusions and a plurality of recesses, and the plurality of protrusions and the plurality of recesses are alternately arranged along the circumference of the bracket to form a wave structure; thereby, the heating element as a whole forms a wave-like structure. For heating elements of the same length, the diameter of the circumference formed by the heating element can be reduced, which is conducive to the use of a bracket with a smaller radial dimension and promotes the miniaturization of the heater.

[0019] Alternatively, the heating element includes a plurality of convex parts and a plurality of concave parts, at least some of the convex parts are in a wave structure, and / or at least some of the concave parts are in a wave structure. By setting the heating element to include a plurality of convex parts and a plurality of concave parts, for heating elements of the same length, the diameter of the circumference formed by the heating element can be reduced, which is conducive to the use of a bracket with a smaller radial dimension and promotes the miniaturization of the heater; further, by setting the convex parts and / or the concave parts to a wave structure, the size of the heating element can be further reduced;

[0020] Alternatively, the main body is provided with a convex rib extending along the length direction of the main body, and the convex rib is arched from one side surface of the main body toward the other side surface opposite to the one side surface, which is beneficial to increase the flow path of the contact between the flowing airflow in the heating element and the main body, thereby increasing the heating area of ​​the main body for the flowing airflow and improving the heating efficiency.

[0021] 3. As a preferred embodiment, the windward side portion is arranged opposite to the air inlet of the heater, and the leeward side portion is arranged opposite to the air outlet of the heater. In this embodiment, the surface of the planar main body of the heating element can be fully in contact with the air entering from the air inlet to heat the air, which can increase the hot air flow rate flowing out of the air outlet per unit time and improve the efficiency of the heater in discharging hot air.

[0022] The thickness of the windward side and / or the leeward side is smaller than the width of the main body, so that the main body has a relatively large surface area to fully heat the airflow passing through its surface, thereby improving the heating efficiency of the heater and the hot air outlet efficiency of the heater.

[0023] Alternatively, the windward side portion is provided with a wind guiding slope; by providing the wind guiding slope, the wind guiding slope can guide the airflow to flow toward the main body, which is more conducive to reducing wind resistance.

[0024] 4. As a preferred embodiment, the heating element comprises an inner heating element arranged along the circumference of the bracket and an outer heating element located outside the inner heating element, a gap is provided between the inner heating element and the outer heating element, the bracket comprises a plurality of first fins and a plurality of second fins, the plurality of first fins and the plurality of second fins are alternately arranged along the circumference of the bracket, the length of the first fin is less than the length of the second fin, the inner heating element is wound on the plurality of first fins, and the outer heating element is wound on the plurality of second fins. In this embodiment, under the premise that the total length of the heating element is constant, two layers of heating elements are provided to reduce the axial dimension occupied by the heating element, which is beneficial to the reduction of the axial dimension of the bracket and the miniaturization of the heater; and the two layers of heating elements are provided on fins of different lengths on the same bracket. Compared with the prior art method of using two brackets to arrange two layers of heating elements respectively, the structure and process are simple, which is beneficial to reducing costs.

[0025] As a preferred embodiment of the present embodiment, the inner heating element is formed by a heating element spirally wound along the outer end of the first wing, and the outer heating element is formed by another heating element spirally wound along the outer end of the second wing, and the winding direction of the inner heating element is opposite to the winding direction of the outer heating element. Thus, the inner heating element and the outer heating element are respectively formed by spirally winding a heating element, and the installation method is simple. In addition, the winding direction of the inner heating element is opposite to the winding direction of the outer heating element, so that the changing electromagnetic fields generated by the inner and outer heating elements under the action of the alternating electric field are opposite in direction, and the two cancel each other out, which can reduce the electromagnetic radiation of the hair dryer.

[0026] 5. As a preferred embodiment, the bracket includes a plurality of fins, which are cross-jointed to form a plurality of sub-fins spaced apart along the circumference of the bracket, and the heating element is wound around the plurality of sub-fins. In this embodiment, the bracket has a simple structure, formed by joining a plurality of fins, and is easy to process and assemble.

[0027] 6. As a preferred embodiment, the bracket includes an inner tube and a plurality of fins extending radially outward along the outer wall of the inner tube, the heating element is wound around the plurality of fins, and one end of the inner tube facing the air inlet is closed and provided with an arc-shaped air guide. In this embodiment, the bracket includes an inner tube, which not only provides conditions for the formation of the fins and can enhance the supporting strength of the fins, but also forms an air guide through the end, which is conducive to guiding the air at the air inlet to flow faster to the heating element and allowing more air to contact the heating element, thereby helping to improve the efficiency of the heater in emitting hot air.

[0028] 7. As a preferred embodiment, the bracket includes a plurality of fins for surrounding the heating element, and the outer ends of the fins are provided with slots for accommodating the heating element, and the top surface of the heating element is arranged lower than the top end of the slot. By providing the slot, the reliability of fixing the heating element can be improved, and the depth of the slot is greater than the thickness of the heating element, so that the heating element can sink into the bottom of the slot to prevent the heating element from escaping from the slot and affecting its installation stability.

[0029] As a preferred embodiment of the present embodiment, the heater further comprises a shell, the bracket is arranged in the shell, and the top end of the slot abuts against the inner wall of the shell. Thus, the top end of the slot abuts against the inner wall of the shell, which can reduce the gap between the heating element and the inner wall of the shell on the one hand, and prevent part of the airflow from flowing out of the heater without contacting the heating element and affecting the hot air output efficiency, and on the other hand, reduce the radial size of the heater as a whole, which is conducive to the miniaturization of the heater, and further promotes the miniaturization of the hair dryer.

[0030] 8. As a preferred embodiment, the heater further comprises a fuse and a thermostat disposed on the bracket, wherein the fuse and the thermostat both extend along the axial direction of the bracket, which is consistent with the flow direction of the airflow. As a result, the windward area of ​​the fuse and the thermostat is small, which can further reduce wind resistance and improve the efficiency of the heater in discharging hot air. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of a heating element in one embodiment of the present application.

[0033] Figure 2 It is a schematic structural diagram of a convex portion in one embodiment of the present application.

[0034] Figure 3 This is a schematic diagram of the structure of a bracket according to one embodiment of the present application.

[0035] Figure 4 This is a schematic structural diagram of a bracket in another embodiment of the present application.

[0036] Figure 5 for Figure 4 Schematic diagram of multiple wing pieces before splicing.

[0037] Figure 6 This is a schematic structural diagram of a heater in which a heating element adopts a single-layer structure in one embodiment of the present application.

[0038] Figure 7 This is a schematic diagram of the structure of a heater in which a heating element adopts a double-layer structure in one embodiment of the present application.

[0039] Figure 8 For Figure 7 Schematic side view of a heater.

[0040] Fig. 9 This is a schematic diagram of the winding of the inner heating element in one embodiment of the present application.

[0041] Fig.10 This is a schematic diagram of the winding of the outer heating element in one embodiment of the present application.

[0042] Fig.11 This is a schematic structural diagram of the main body of the heating element in one embodiment of the present application.

[0043] Reference numerals:

[0044] 10. Heater; 11. Bracket; 12. Heater; 121. Main body; 1211. Rib; 122. Windward side; 123. Leeward side; 13. Air inlet; 14. Air outlet; 15. Shell; 124. Protrusion; 125. Concave; 161. Inner layer heater; 162. Outer layer heater; 111. First wing; 112. Second wing; 113. Avoidance; 17a. Wing; 171. Sub-wing; 172. Slot; 17b. Wing; 173. Inner tube; 174. Air guide; 18. Slot; 181. Top end of the slot; 19. Fuse; 20. Thermostat. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0046] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0047] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0048] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are only connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0051] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0052] like Figures 1 to 10As shown, the present application provides a heater 10 for a hair dryer, comprising a bracket 11 and a heating element 12, wherein the heating element 12 is arranged around the bracket 11 along the circumference of the bracket 11, and the heating element 12 is in a strip shape, and the heating element 12 comprises a planar main body 121 and a linear side portion, wherein the side portion comprises a windward side portion 122 and a leeward side portion 123 arranged opposite to the windward side portion 122, the windward side portion 122 is arranged toward the air inlet 13 of the heater 10, and the leeward side portion 123 is arranged toward the air outlet 14 of the heater 10.

[0053] The heater 10 for a hair dryer of the utility model adopts a strip-shaped heating element 12, and the heating element 12 includes a linear windward side portion 122 and a leeward side portion 123, and is respectively arranged toward the air inlet 13 and the air outlet 14 of the heater. Compared with the conventional cylindrical heating wire, since the windward side portion 122 and the leeward side portion 123 are linear and have a very small surface area, the wind resistance of the airflow in the heater is better reduced, which is beneficial to the flow of the airflow in the heater 10 to reduce noise. At the same time, the planar main body portion 121 has a larger heating surface area, which can fully heat the airflow passing through its surface, thereby improving the heating efficiency of the heater 10 and the hot air outlet efficiency of the heater.

[0054] Specifically, Figure 7 As shown, the heater 10 further includes a shell 15 surrounding the outside of the bracket 11. The bracket 11 and the heating element 12 can be assembled into a structural member and then assembled with the shell 15. The shell 15 is axially through, and the air inlet 13 of the heater 10 is, for example, arranged at one end of the shell 15, and the air outlet 14 is arranged at the other end of the shell 15. The airflow flows into the shell 15 through the air inlet 13 and contacts the heating element 12 to generate hot air, and then flows out from the air outlet 14. Figure 1 and Figure 6 As shown, when the airflow flows through the heating element 12, it can fully contact with the main body 121 to exchange heat. According to theoretical calculations, compared with conventional cylindrical heating wires of the same length, the heating element 12 of the present application has a larger relative surface area, that is, the heating element 12 of the present application has a larger contact area with the air, which can improve the efficiency of the heater 10 in emitting hot air. Figure 1 As shown, the windward side portion 122 opposite to the airflow is linear and has a smaller windward area, which can reduce wind resistance.

[0055] The heating element 12 is provided with multiple turns, and the heating element 12 can be provided with a single layer or multiple layers according to actual needs.

[0056] As a preferred embodiment, the heat generating element 12 includes a plurality of protrusions 124 and a plurality of recesses 125 , and the plurality of protrusions 124 and the plurality of recesses 125 are alternately arranged along the circumference of the bracket 11 to form a wave structure.

[0057] like Figure 1 , Figures 6 to 8 As shown, the heating element 12 includes a plurality of protrusions 124 and a plurality of recesses 125. The heating element 12 as a whole forms a wavy structure. For heating elements 12 of the same length, the diameter of the circle formed by the heating element 12 can be reduced, which is conducive to the use of a bracket 11 with a smaller radial dimension and promotes the miniaturization of the heater 10.

[0058] Further, such as Figure 2 As shown, at least part of the protrusion 124 is configured as a wave structure, which can further reduce the size of the heating element 12 under the premise that the length of the heating element 12 is constant.

[0059] Furthermore, at least a portion of the recess 125 may also be in a wave structure to further reduce the size of the heating element 12 .

[0060] In another embodiment, the heating element 12 includes a plurality of protrusions 124 and a plurality of recesses 125, at least some of the protrusions 124 are in a wave structure, and / or at least some of the recesses 125 are in a wave structure. Specifically, this embodiment does not limit the arrangement of the plurality of protrusions 124 and the plurality of recesses 125. For example, in one embodiment, the plurality of protrusions 124 are continuously arranged, and the plurality of recesses 125 are continuously arranged; or, in another embodiment, some of the protrusions 124 are continuously arranged to form a convex unit, and some of the recesses 125 are continuously arranged to form a concave unit, and the convex units and the concave units are alternately arranged. Furthermore, for a single protrusion 124 or recess 125, the smallest unit can be designed as a wave structure to further reduce the size of the heating element 12.

[0061] In another embodiment, the main body 121 is provided with a convex rib 1211 extending along the length direction of the main body 121. The convex rib 1211 is arched from one side surface of the main body 121 toward the other side surface opposite to the one side surface, which is beneficial to increase the flow path of the flow of air in the heater 10 and the contact with the main body, thereby increasing the heating area of ​​the flow of air by the main body 121 and improving the heating efficiency. Specifically, this embodiment does not limit the number of convex ribs 1211. The convex ribs 1211 can be multiple and spaced along the length direction of the main body 121; the convex rib 1211 can also be one and extend from one end of the main body 121 toward the other end of the main body, such as Fig.11 shown.

[0062] As a preferred implementation, the windward side portion 122 is disposed opposite to the air inlet 13 of the heater 10 , and the leeward side portion 123 is disposed opposite to the air outlet 14 of the heater 10 .

[0063] In this embodiment, the bracket 11 and the shell 15 are coaxially arranged, so that the surface of the planar main body 121 of the heating element 12 can fully contact the air entering from the air inlet 13 to heat the air, which can increase the hot air flow rate flowing out of the air outlet 14 per unit time and improve the efficiency of the heater 10 in discharging hot air.

[0064] Among them, the size relationship between the windward side 122, the leeward side 123 and the main body 121 is that in one embodiment, the thickness of the windward side 122 and / or the leeward side 123 is smaller than the width of the main body 121; so that the main body 121 has a relatively large surface area to fully heat the airflow passing through its surface, thereby improving the heating efficiency of the heater and the hot air outlet efficiency of the heater.

[0065] It can be understood that in order to better reduce wind resistance, in one embodiment, the windward side portion 122 is provided with a wind guiding slope; by providing the wind guiding slope, the wind guiding slope can guide the airflow to flow toward the main body 121, which is more conducive to reducing wind resistance.

[0066] As a preferred embodiment, the heating element 12 includes an inner heating element 161 arranged along the circumference of the bracket 11 and an outer heating element 162 located outside the inner heating element 161, and a gap is provided between the inner heating element 161 and the outer heating element 162. The bracket 11 includes a plurality of first winglets 111 and a plurality of second winglets 112. The plurality of first winglets 111 and the plurality of second winglets 112 are alternately arranged along the circumference of the bracket 11, and the length of the first winglet 111 is smaller than the length of the second winglet 112. The inner heating element 161 is wound around the plurality of first winglets 111, and the outer heating element 162 is wound around the plurality of second winglets 112.

[0067] like Figure 7 and Figure 8 As shown, in this embodiment, under the premise that the total length of the heating element 12 is certain, two layers of heating elements 12 are provided to reduce the axial dimension occupied by the heating element 12, which is beneficial to the reduction of the axial dimension of the bracket 11 and can promote the miniaturization of the heater 10; and, the two layers of heating elements 12 are provided on wings of different lengths on the same bracket 11. Compared with the prior art method of using two brackets 11 to respectively arrange two layers of heating elements 12, the structure and process are simple, which is beneficial to reducing costs.

[0068] For example, Figure 7 As shown, a through avoidance opening 113 is provided at the lower end of the second wing 112 so that the inner layer heating element 161 can pass through the avoidance opening 113 when the inner layer heating element 161 is wound.

[0069] As a preferred embodiment of the present embodiment, the inner heating element 161 is formed by a heating element 12 being spirally wound along the outer end of the first wing 111, and the outer heating element 162 is formed by another heating element 12 being spirally wound along the outer end of the second wing 112, and the winding direction of the inner heating element 161 is opposite to that of the outer heating element 162.

[0070] like Fig. 9 and Fig.10 As shown, the inner heating element 161 and the outer heating element 162 are respectively formed by spirally winding a heating element 12, and the installation method is simple. In addition, the winding direction of the inner heating element 161 is opposite to the winding direction of the outer heating element 162, so that the changing electromagnetic fields generated by the inner and outer heating elements 162 under the action of the alternating electric field are in opposite directions, and the two cancel each other out, thereby reducing the electromagnetic radiation of the hair dryer.

[0071] Specifically, when installing the heating element 12, first wind the inner heating element 161, for example, in a right-handed manner, and then wind the outer heating element 162, for example, in a left-handed manner. Only two windings are required, and the operation steps are simple and efficient.

[0072] It is understandable that in other embodiments, the heating element 12 may also be configured as a single-layer structure, such as Figure 6 shown.

[0073] The bracket 11 of the present application includes at least two types; the first type is that the bracket 11 is directly formed by splicing a plurality of wing pieces; the second type is that the bracket 11 includes a cylindrical inner tube 173 and wing pieces, and the wing pieces are arranged on the inner tube 173.

[0074] In one embodiment, the bracket 11 includes a plurality of fins 17 a , which are cross-spliced ​​to form a plurality of sub-fins 171 spaced apart along the circumference of the bracket 11 , and the heat generating element 12 is wound around the plurality of sub-fins 171 .

[0075] In this embodiment, the structure of the bracket 11 is simple, and is formed by splicing a plurality of fins 17a, which is easy to process and assemble. Figure 4 and Figure 5 As shown, a solution of splicing three wing pieces 17a is shown, and finally six sub-wing pieces 171 can be formed. Figure 5 As shown, each wing 17a is provided with a slot 172 in the middle, and preferably, the extending direction of the slot 172 is consistent with the center line of the wing 17a, wherein the middle wing 17a is provided with two slots 172 at both ends in the length direction, and the two wings 17a on both sides are provided with a slot 172, and the two wings 17a on both sides have different inclination angles relative to the middle wing 17a, and the three wings 17a are plugged into each other to form Figure 4It is understood that the number of fins 17a is not limited to Figure 5 The number of the plurality of elements is at least two and can be greater than three.

[0076] In another embodiment, the bracket 11 includes an inner cylinder 173 and a plurality of fins 17b extending radially outward along the outer wall of the inner cylinder 173, the heating element 12 is wound around the plurality of fins 17b, and one end of the inner cylinder 173 facing the air inlet 13 is closed and provided with an arc-shaped air guide portion 174.

[0077] In this embodiment, the bracket 11 includes an inner cylinder 173, which not only provides conditions for the formation of the wing 17b and strengthens the supporting strength of the wing 17b, but also forms an air guide portion 174 through the end, which is beneficial to guiding the air at the air inlet 13 to flow faster to the heating element 12 and allow more air to contact the heating element 12, thereby helping to improve the efficiency of the heater 10 in emitting hot air.

[0078] like Figure 3 As shown, the wing 17b and the inner cylinder 173 can be an integral structure or a split structure. When the structure is a split structure, the wing 17b can be connected to the inner cylinder 173 by bonding, welding, etc. The inner cylinder 173 is open at one end and closed at the other end. The arc-shaped air guide portion 174 forms a similar cone head structure, which is used for guiding wind and promoting smooth airflow. Preferably, one end of the wing 17b extends to the air guide portion 174, which can promote the airflow along the air guide portion 174 to flow faster to the heating element 12 on the wing 17b.

[0079] As a preferred embodiment, the bracket 11 includes a plurality of fins 17b for winding the heating element 12, and the outer end of the fin 17b is provided with a slot 18 for accommodating the heating element 12, and the top surface of the heating element 12 is arranged lower than the top end 181 of the slot.

[0080] like Figure 3 As shown, by providing the slot 18, the reliability of fixing the heating element 12 can be improved, and the depth of the slot 18 is greater than the thickness of the heating element 12, so that the heating element 12 can sink into the bottom of the slot 18 to prevent the heating element 12 from being separated from the slot 18 and affecting its installation stability. Furthermore, the width of the slot 18 is not less than the width of the heating element 12, so that the heating element 12 is easy to disassemble and assemble.

[0081] As a preferred embodiment of the present embodiment, the heater 10 further includes a shell 15 , the bracket 11 is disposed in the shell 15 , and the top end portion 181 of the slot abuts against the inner wall of the shell 15 .

[0082] This embodiment abuts the top end 181 of the slot against the inner wall of the shell 15. On the one hand, it can reduce the gap between the heating element 12 and the inner wall of the shell 15 to prevent a part of the airflow from flowing out of the heater 10 without contacting the heating element 12 and affecting the hot air output efficiency. On the other hand, it can reduce the overall radial size of the heater 10, which is conducive to the miniaturization of the heater 10 and further promotes the miniaturization of the hair dryer.

[0083] It can be understood that the scheme of providing the card slot 18 is applicable to both the bracket 11 structure of the single-layer heating element 12 and the bracket 11 structure of the double-layer heating element 12. Figure 7 As shown, in the example of the double-layer heating element 12, the bracket 11 includes a first wing 111 and a second wing 112. The length of the first wing 111 is smaller than the length of the second wing 112. The top end 181 of the slot on the second wing 112 abuts against the inner wall of the shell 15. The first wing 111 is located on the inner side of the inner wall of the shell 15 due to its smaller length.

[0084] As a preferred embodiment, the heater 10 further includes a fuse 19 and a thermostat 20 disposed on the bracket 11 , and the fuse 19 and the thermostat 20 both extend along the axial direction of the bracket 11 , which is consistent with the flow direction of the airflow.

[0085] like Figure 3 As shown, the windward area of ​​the fuse 19 and the thermostat 20 is relatively small, which can further reduce the wind resistance and improve the efficiency of the heater 10 in discharging hot air.

[0086] Based on the above-mentioned heater 10, the present application also provides a hair dryer, which includes the heater 10 of the above-mentioned implementation manner and example, and the specific structure is not repeated here.

[0087] The technical solution protected by the present utility model is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any embodiment with the technical solution of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present utility model are within the scope of protection claimed by the present utility model.

Claims

1. A heater for a hair dryer, comprising a bracket and a heating element, wherein the heating element is arranged around the bracket along the circumference of the bracket, characterized in that: The heating element is in the shape of a strip, and includes a planar main body and a linear side portion, the side portion includes a windward side portion and a leeward side portion arranged opposite to the windward side portion, the windward side portion is arranged toward the air inlet of the heater, and the leeward side portion is arranged toward the air outlet of the heater.

2. A heater for a hair dryer according to claim 1, characterized in that: The heating element comprises a plurality of convex parts and a plurality of concave parts, and the plurality of convex parts and the plurality of concave parts are alternately arranged along the circumference of the bracket to form a wave structure; Alternatively, the heating element comprises a plurality of convex portions and a plurality of concave portions, at least some of the convex portions are in a wave structure, and / or at least some of the concave portions are in a wave structure; Alternatively, the main body is provided with a convex rib extending along the length direction of the main body, and the convex rib is arched from one side surface of the main body toward another side surface opposite to the one side surface.

3. A heater for a hair dryer according to claim 1, characterized in that: The windward side is arranged opposite to the air inlet of the heater, and the leeward side is arranged opposite to the air outlet of the heater; the thickness of the windward side and / or the leeward side is smaller than the width of the main body; or, the windward side is provided with a wind guiding slope.

4. A heater for a hair dryer according to claim 1, characterized in that: The heating element comprises an inner heating element arranged along the circumference of the bracket and an outer heating element located outside the inner heating element, a gap is arranged between the inner heating element and the outer heating element, the bracket comprises a plurality of first wings and a plurality of second wings, the plurality of first wings and the plurality of second wings are alternately arranged along the circumference of the bracket, the length of the first wing is smaller than the length of the second wing, the inner heating element is wound around the plurality of first wings, and the outer heating element is wound around the plurality of second wings.

5. A heater for a hair dryer according to claim 4, characterized in that: The inner heating element is formed by spirally winding a heating element along the outer end of the first wing, and the outer heating element is formed by spirally winding another heating element along the outer end of the second wing. The winding direction of the inner heating element is opposite to that of the outer heating element.

6. A heater for a hair dryer according to claim 1, characterized in that: The bracket comprises a plurality of fins, the plurality of fins are cross-jointed to form a plurality of sub-fins spaced apart along the circumference of the bracket, and the heat generating element is wound around the plurality of sub-fins.

7. A heater for a hair dryer according to claim 1, characterized in that: The bracket includes an inner tube and a plurality of fins extending radially outward along the outer wall of the inner tube, the heating element is wound around the plurality of fins, and one end of the inner tube facing the air inlet is closed and provided with an arc-shaped air guide portion.

8. A heater for a hair dryer according to claim 1, characterized in that: The bracket includes a plurality of fins for surrounding the heating element, and the outer ends of the fins are provided with slots for accommodating the heating element, and the top surface of the heating element is arranged lower than the top end of the slot.

9. A heater for a hair dryer according to claim 8, characterized in that: The heater further comprises a shell, the bracket is arranged in the shell, and the top end of the slot abuts against the inner wall of the shell.

10. A heater for a hair dryer according to claim 1, characterized in that: The heater further comprises a fuse and a thermostat which are arranged on the bracket. The fuse and the thermostat both extend along the axial direction of the bracket and are consistent with the flow direction of the airflow.

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