A simple architecture heating element module for a high speed hair dryer
By using heat-insulating rings and conductive sheets, combined with thermal fuses and thermal protectors, the problem of large heating element modules and numerous connecting wires in high-speed hair dryers has been solved, resulting in a smaller body design and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO DECHANG ELECTRICAL MACHINERY MFG CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-02
AI Technical Summary
Existing high-speed hair dryers have large heating element modules and many connecting wires, which causes the resistance wires to overheat and affect the lifespan of the connecting wires, thus affecting the overall lifespan. This makes them unsuitable for small-diameter body designs.
It adopts a heat-insulating ring and conductive sheet design, eliminating internal wiring and directly connecting the external wires through the conductive sheet. It combines thermal fuse and thermal protector for dual thermal protection. The heating wire coil bracket is divided into multiple ventilation zones to ensure safety and temperature monitoring.
It improves the safety and lifespan of the heating element module, supports a smaller body design, avoids airflow leakage and noise differences, ensures rapid cooling of the resistance wire, and protects consumer safety.
Smart Images
Figure CN224316410U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of hair dryers, and in particular to a simplified heating element module for high-speed hair dryers. Background Technology
[0002] A hair dryer consists of a heating element module and a high-speed motor, with fan blades on the motor to blow air. When powered on, the heating element module generates heat, and the air blown by the fan passes through the heating element module, becoming hot air. If only the fan rotates but the heating element module does not heat up, then only air will be blown out, not hot air.
[0003] Current high-speed hair dryer products have large heating element modules with numerous connecting wires. These connecting wires and resistance wires are located in the same channel, and the high temperature of the resistance wire directly affects the lifespan of the connecting wires, thus impacting the lifespan of the entire heating element module. Furthermore, the existing heating element modules are too large to be used in high-speed hair dryers with smaller diameter designs.
[0004] In summary, there is a need for a simplified heating element module architecture for high-speed hair dryers that can improve service life. Utility Model Content
[0005] This invention aims to overcome the shortcomings of existing technologies where the high temperature of the resistance wire directly affects the service life of the connecting wire, and thus the service life of the entire heating element module. It provides a simplified heating element module with an improved service life for high-speed hair dryers.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A simplified heating element module for a high-speed hair dryer, comprising:
[0008] A heat insulation ring, wherein a heating air duct is provided on the inner side of the heat insulation ring;
[0009] The heating element structure is located inside the heating air duct;
[0010] Conductive sheet one and conductive sheet two are fixed to the heating element structure, and both conductive sheet one and conductive sheet two are placed on the outer surface of the heat insulation ring;
[0011] The wiring terminal is fixed to the first conductive piece and the second conductive piece;
[0012] Sealing rings are located at both ends of the heat insulation ring, and the wiring terminals are located between the sealing rings at both ends.
[0013] The heating element module has no connecting wires; instead, it uses conductive plates one and two as its terminals. These conductive plates extend directly into the external space of the heating element for riveting connection to the external wiring. The heating air duct does not affect the external wiring, and the external wiring is not located within the heating air duct inside the heat insulation ring, eliminating any electrical safety risks and improving safety and service life. The sealing ring seals the outer wall of the heat insulation ring against the inner wall of the blower duct housing, ensuring leak-free high-speed airflow through the heating element module.
[0014] Preferably, the heating element structure includes a heating wire coil support placed inside the heating duct. The heating wire coil support is plugged into and fixed to the heating duct. A thermal fuse, a thermal protector, and the heating wire coil are fixed on the heating wire coil support. A conductive plate is electrically connected to the thermal fuse via a conductive rod, and the thermal fuse is electrically connected to the thermal protector via a conductive rod. The thermal protector is electrically connected to one end of the heating wire coil, and the other end of the heating wire coil is electrically connected to the conductive plate. This invention abandons the traditional NTC temperature sensor and uses dual thermal protection of a thermal fuse and a thermal protector for high-temperature protection, improving safety. The heating element structure inside the heating duct eliminates the internal wiring and connection fixing structure, saving space and allowing for a smaller diameter heating element module, enabling a smaller body design. It also avoids differences in wind speed and noise caused by internal wiring.
[0015] Preferably, the heating wire coil support includes several heat insulation sheets that are interlocked and fixed together. These heat insulation sheets evenly divide the heating air duct into several ventilation areas with the same cross-sectional shape. The outer wall of each heat insulation sheet has a winding groove that matches the heating wire coil. The heating wire coil is wound within the winding groove, with its central axis coinciding with the central axis of the heating air duct. A heat dissipation gap is provided between the heating wire coil and the inner wall of the heating air duct. The winding groove design facilitates the winding of the heating wire coil onto the heat insulation sheets. The heat dissipation gap design ensures rapid cooling of the high-temperature resistance wire by the high-speed airflow.
[0016] Preferably, the heat insulation sheet has a heat protector mounting groove at its end, located on the central axis of the heating air duct. The heat protector is placed in the heat protector mounting groove and fixedly connected to the heat insulation sheet. This heat protector positioning design allows for real-time monitoring of the air outlet temperature of the air duct housing, protecting the consumer's hair and preventing high-temperature damage to the scalp.
[0017] Preferably, a thermal fuse mounting slot is provided in the middle of the heat insulation sheet. This slot is located at the inner center of the heating wire coil, and the thermal fuse is placed within the slot and fixedly connected to the heat insulation sheet. Because the heating wire operates at high temperatures, if the thermal fuse is too close, it may melt prematurely before reaching the required temperature, rendering the product unusable. The thermal fuse's position design ensures that the distance between the thermal fuse and the resistance wire of the winding remains consistent, improving the accuracy of temperature monitoring and providing more precise protection.
[0018] The beneficial effects of this utility model are: improved safety and service life; prevention of air leakage; the heating element structure allows for a smaller body while avoiding differences in wind speed and noise caused by internal wiring; it ensures that high-speed airflow can quickly cool the high-temperature resistance wire; it can monitor the temperature of the air outlet of the air duct housing in real time, protecting consumers' hair safety and avoiding high-temperature damage to the scalp; and it improves the accuracy of temperature monitoring, making protection more precise. Attached Figure Description
[0019] Figure 1 This is a perspective view of the present invention;
[0020] Figure 2 This is a partial exploded view of this utility model.
[0021] In the diagram: 17. Insulating ring, 18. Heating duct, 19. Conductive sheet one, 20. Conductive sheet two, 21. Terminal block, 22. Sealing ring, 23. Thermal fuse, 24. Thermal protector, 25. Heating wire coil, 26. Insulating sheet, 27. Winding groove, 28. Thermal fuse mounting slot, 29. Thermal protector mounting slot. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0023] like Figure 1 and Figure 2 In the embodiments described above, a simplified heating element module for a high-speed hair dryer includes:
[0024] A heat insulation ring 17 is provided, and a heating air duct 18 is provided on the inner side of the heat insulation ring 17;
[0025] The heating element structure is located inside the heating air duct 18;
[0026] Conductive sheet 19 and conductive sheet 20 are fixed on the heating element structure, and both conductive sheet 19 and conductive sheet 20 are placed on the outer surface of the heat insulation ring 17.
[0027] Terminal 21 is fixed to conductive sheet 19 and conductive sheet 20;
[0028] The sealing rings 22 are located at both ends of the heat insulation ring 17, and the wiring terminals 21 are located between the sealing rings 22 at both ends.
[0029] The heating element structure includes a heating wire coil bracket placed inside the heating air duct 18. The heating wire coil bracket and the heating air duct 18 are plugged and fixed. A thermal fuse 23, a thermal protector 24 and a heating wire coil 25 are fixed on the heating wire coil bracket. The conductive sheet 19 is electrically connected to the thermal fuse 23 through a conductive rod 1 and is fixed by riveting. The thermal fuse 23 is electrically connected to the thermal protector 24 through a conductive rod 2 and is fixed by riveting. The thermal protector 24 is electrically connected to one end of the heating wire coil 25 and is fixed by riveting. The other end of the heating wire coil 25 is electrically connected to the conductive sheet 20 and is fixed by riveting.
[0030] The heating wire coil support includes three heat insulation plates 26 that are interlocked and fixed together. The heat insulation plates 26 are spaced 60° apart and evenly divide the heating air duct 18 into six ventilation areas with the same cross-sectional shape. The outer wall of the heat insulation plate 26 has winding grooves 27 that match the heating wire coil 25. The spacing between the winding grooves 27 is 1.5mm. The heating wire coil 25 is wound within the winding grooves 27. The spacing between each coil of the heating wire coil 25 is 1.5mm. The central axis of the heating wire coil 25 coincides with the central axis of the heating air duct 18. A heat dissipation gap 28, 1.5mm~2mm in size, is provided between the heating wire coil 25 and the inner wall of the heating air duct 18. The heating wire coil 25 can be made of different materials, with a wire diameter of 0.4mm~0.45mm, deep wave pattern, and is wound on the spacers using a single-wire method.
[0031] The end of the heat insulation sheet 26 is provided with a heat protector mounting groove 29, which is located on the central axis of the heating air duct 18. The heat protector 24 is placed in the heat protector mounting groove 29 and is fixedly connected to the heat insulation sheet 26.
[0032] A thermal fuse mounting groove 28 is provided in the middle of the heat insulation sheet 26. The thermal fuse mounting groove 28 is located at the inner center of the heating wire coil 25. The thermal fuse 23 is placed in the thermal fuse mounting groove 28 and is fixedly connected to the heat insulation sheet 26.
[0033] During the assembly of the heating element module, first, the thermal fuse 23 is installed into the thermal fuse mounting slot 28 in the middle of the heat insulation sheet 26. Then, all the heat insulation sheets 26 are interlocked and fixed to form a heating wire coil bracket. Next, the thermal protector 24 is installed into the thermal protector mounting slot 29 at the end of the heat insulation sheet 26. The heating wire coil 25 is wound around the outside of the heating wire coil bracket and fixed to the heating wire coil bracket by riveting (the outer wall of the heat insulation sheet 26 is provided with a winding groove 27 that matches the heating wire coil 25). The conductive sheet 19 and the conductive sheet 20 are riveted and fixed to the heating wire. On the coil support, a pair of conductive rods are used to electrically connect the first conductive piece 19 to the thermal fuse 23 and fix it with riveting. A second conductive rod is used to electrically connect the thermal fuse 23 to the thermal protector 24 and fix it with riveting. The thermal protector 24 is then electrically connected to one end of the heating wire coil 25 and fixed with riveting. The other end of the heating wire coil 25 is electrically connected to the second conductive piece 20 and fixed with riveting. This completes the assembly of the heating element structure. Finally, the heat insulation ring 17 is fitted onto the outside of the heating element structure to complete the assembly of the entire heating element module. The heating wire coil support composed of heat insulation pieces 26 evenly divides the heating air duct 18 inside the heat insulation ring 17 into several ventilation areas with the same cross-sectional shape. The first conductive piece 19 and the second conductive piece 20 are both placed on the outer surface of the heat insulation ring 17 to facilitate external wiring.
[0034] When installing the heating element module, first put the sealing rings 22 on both ends of the heat insulation ring 17, and then assemble the entire heating element module into the corresponding position inside the blower duct housing and connect it to the external wires through the conductive sheet 19 and the conductive sheet 20.
[0035] The heating element module of this invention adopts a wiring-free design, using conductive sheet 19 and conductive sheet 20 as the wiring terminals. Conductive sheet 19 and conductive sheet 20 extend directly to the external space of the heating element module for riveting connection with the external wiring body. The interior of the heating duct 18 does not affect the external wiring body, and the external wiring body is not located within the heating duct 18 inside the heat insulation ring 17, thus eliminating any electrical safety risks. Furthermore, by eliminating the internal wiring and connection fixing structure, space can be saved, resulting in a smaller diameter heating element module, allowing for a smaller body design. This also avoids the differences in wind speed and noise caused by internal wiring. This invention abandons the traditional NTC temperature sensor, employing dual thermal protection of a thermal fuse 23 and a thermal protector 24 for high-temperature protection, improving safety.
Claims
1. A simplified heating element module for a high-speed hair dryer, characterized in that, include: A heat insulation ring (17) is provided with a heating air duct (18) on its inner side. The heating element structure is disposed inside the heating air duct (18); Conductive sheet one (19) and conductive sheet two (20) are fixed on the heating element structure, and both conductive sheet one (19) and conductive sheet two (20) are placed on the outer surface of the heat insulation ring (17); The wiring terminal (21) is fixed on the first conductive piece (19) and the second conductive piece (20); The sealing rings (22) are located at both ends of the heat insulation ring (17), and the terminal block (21) is located between the sealing rings (22) at both ends.
2. The simplified heating element module for a high-speed hair dryer according to claim 1, characterized in that, The heating element structure includes a heating wire coil support placed inside the heating air duct (18). The heating wire coil support and the heating air duct (18) are plugged and fixed. A thermal fuse (23), a thermal protector (24) and a heating wire coil (25) are fixed on the heating wire coil support. The first conductive piece (19) is electrically connected to the thermal fuse (23) through a first conductive rod. The thermal fuse (23) is electrically connected to the thermal protector (24) through a second conductive rod. The thermal protector (24) is electrically connected to one end of the heating wire coil (25). The other end of the heating wire coil (25) is electrically connected to the second conductive piece (20).
3. A simplified heating element module for a high-speed hair dryer according to claim 2, characterized in that, The heating wire coil support includes several heat insulation sheets (26) that are inserted and fixed to each other. The heat insulation sheets (26) divide the heating air duct (18) into several ventilation areas with the same cross-sectional shape. The outer wall of the heat insulation sheet (26) is provided with a winding groove (27) that matches the heating wire coil (25). The heating wire coil (25) is wound in the winding groove (27). The central axis of the heating wire coil (25) coincides with the central axis of the heating air duct (18). A heat dissipation gap is provided between the heating wire coil (25) and the inner wall of the heating air duct (18).
4. A simplified heating element module for a high-speed hair dryer according to claim 3, characterized in that, The end of the heat insulation sheet (26) is provided with a heat protector mounting groove (29), which is located on the central axis of the heating air duct (18). The heat protector (24) is placed in the heat protector mounting groove (29) and is fixedly connected to the heat insulation sheet (26).
5. A simplified heating element module for a high-speed hair dryer according to claim 3, characterized in that, A thermal fuse mounting groove (28) is provided in the middle of the heat insulation sheet (26). The thermal fuse mounting groove (28) is located at the inner center of the heating wire coil (25). The thermal fuse (23) is placed in the thermal fuse mounting groove (28) and is fixedly connected to the heat insulation sheet (26).