Wireless heat dissipation system for high-temperature components in high-speed blower

Abstract

The invention discloses a wireless heat dissipation system for high-temperature components in a high-speed blower. The air duct comprises an air duct shell; the fan is fixed in the air duct shell, and the fan is arranged between the air inlet end of the air duct shell and the air outlet end of the air duct shell; the first limiting opening is formed in the side wall of the air duct shell, and the first limiting opening is formed between the draught fan and the air outlet end of the air duct shell; the IGBT module is mounted at the limiting opening I and is in sealed connection with the limiting opening I; the IGBT wire is arranged on the IGBT module and is positioned outside the air duct shell; the second limiting opening is formed in the side wall of the air duct shell, and the second limiting opening is formed between the draught fan and the air outlet end of the air duct shell; the IPM module is mounted at the limiting opening II and is in sealed connection with the limiting opening II; the IPM wire is arranged on the IPM module and located outside the air duct shell; the main control board is arranged outside the air duct shell and connected with the IGBT wire and the IPM wire. The method has the beneficial effect that wiring in the air duct is not needed.

Description

Technical Field

[0001] The present invention relates to the technical field related to hair dryers, and in particular to a wireless heat dissipation system for high-temperature components in a high-speed hair dryer. Background Art

[0002] A hair dryer is composed of a resistor wire and a high-speed motor with fan blades. When powered, the resistor wire generates heat, and the air from the fan passes through the resistor wire, becoming hot air. If only the fan is spinning without the resistor wire heating up, the air blown out is just air, not heat.

[0003] In the high-speed hair dryers currently on the market where the motor and heating module are coaxially arranged, there are two heat dissipation solutions for high-temperature components: (1) The high-temperature component is integrated with the main control board and placed at the air inlet (motor air inlet end). Its heat dissipation surface is uncovered, and the air flow can carry away the surface high temperature when passing through to complete the cooling process. This heat dissipation method will cause the entire machine to be longer and inconvenient to use; (2) The high-temperature component is placed as a module in the air duct and located at the air outlet end of the high-speed fan, and is cooled by high-speed airflow. The high-temperature component is connected to the main control board of the hair dryer through the internal wiring penetrating the air duct. Although this method solves the problem of the entire machine being longer and inconvenient to use, it will lead to: a. There are many wires in the air duct; b. The internal wiring penetration part on the air duct needs to be sealed specifically; c. The internal wires have no consistent shape, which affects the wind speed and wind noise; d. The product is difficult to install; e. The part is difficult to repair after a failure.

[0004] In summary, there is a need for a wireless heat dissipation system for high-temperature components in a high-speed hair dryer that does not require wiring inside the air duct. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art in which high-temperature components are placed separately in the air duct for heat dissipation, and need to be connected to the main control board of the hair dryer through internal wiring penetrating the air duct. It provides a wireless heat dissipation system for high-temperature components in high-speed hair dryers that does not require wiring inside the air duct.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A wireless heat dissipation system for high-temperature components in a high-speed hair dryer, comprising: Air duct housing; A fan is fixed inside the air duct housing, and the fan is arranged between the air inlet end and the air outlet end of the air duct housing; A first limiting opening is provided on the side wall of the air duct housing, wherein the first limiting opening is provided between the fan and the air outlet end of the air duct housing; An IGBT module is installed at one of the limit openings and is sealed therewith; An IGBT wire is provided on the IGBT module and is located outside the air duct housing; A second limiting opening is provided on the side wall of the air duct housing, and the second limiting opening is provided between the fan and the air outlet end of the air duct housing; An IPM module is installed at the second limit opening and is sealed therewith; An IPM wire is provided on the IPM module and is located outside the air duct housing; The main control board is arranged outside the air duct housing and is connected to the IGBT wires and the IPM wires.

[0007] The IGBT module and the IPM module are both heat sources with high heat generation in the hair dryer and need to be cooled by the air duct. The present invention sets a limiting opening 1 and a limiting opening 2 on the side wall of the air duct housing, so that the IGBT module and the IPM module are sealed and installed at the limiting opening 1 and the limiting opening 2 respectively, and the heat-generating parts of the IGBT module and the IPM module are built into the inner side of the air duct housing, so that the IGBT wires and the IPM wires on the IGBT module and the IPM module are placed outside the air duct housing. This effectively avoids the disadvantage that the IGBT wires and the IPM wires need to penetrate the air duct housing to connect to the main control board of the hair dryer, and realizes a wireless design inside the air duct housing. On the one hand, it minimizes the interference effect of the IGBT wires and the IPM wires on the air duct housing, and also minimizes the impact on the air flow and wind noise. On the other hand, the wiring of the IGBT wires and the IPM wires is all outside the air duct, making wiring, wiring and installation simple.

[0008] Preferably, the IGBT module includes an IGBT substrate, the outer edge of the limiting opening (1) is coated with a foam adhesive, the IGBT substrate is bonded to the limiting opening via the foam adhesive, the IGBT wire is connected to the outer panel of the IGBT substrate, an IGBT tube is fixed to the inner panel of the IGBT substrate, and the IGBT tube passes through the limiting opening and is placed inside the air duct housing. During installation, the outer edge of the limiting opening (1) is bonded with a high-density foam adhesive, and the circuit board plane of the IGBT substrate is then pressed against the foam adhesive. The foam adhesive is compressed to complete the sealing, resulting in a stable connection and good sealing effect. The IGBT tube (thyristor) is the heat source with the highest heat generation in the hair dryer and is built into the air duct housing for cooling. The IGBT wire is used to connect to the main control board of the hair dryer and is placed outside the air duct housing to avoid affecting the interior of the air duct housing.

[0009] Preferably, an IGBT gland is provided on the outside of the IGBT substrate. The IGBT substrate is fixed between the IGBT gland and a limiting opening. A limiting clip is fixed on both sides of the IGBT gland. The air duct housing is provided with a limiting slot that matches the limiting clip. The IGBT gland is engaged with the air duct housing through the cooperation of the limiting clip and the limiting slot. After the IGBT module is installed on the side wall of the air duct housing, the IGBT gland is clamped on the outside of the IGBT module by using the cooperation of the limiting clip and the limiting slot to further protect and fix the IGBT module. The installation is convenient and the disassembly and maintenance are easy. The IGBT gland is provided with an IGBT gland notch, and the IGBT wire is led out from the IGBT gland notch.

[0010] Preferably, the IPM module includes an IPM substrate, the outer edge of the second limiting opening is coated with a second foam adhesive, the IPM substrate is bonded to the second limiting opening via the second foam adhesive, the IPM wire is connected to the outer panel of the IPM substrate, an IPM chip is fixed to the inner panel of the IPM substrate, and the IPM chip is placed inside the air duct housing through the second limiting opening. During installation, the outer edge of the second limiting opening is bonded with a second high-density foam adhesive, and the circuit board plane of the IPM substrate is then pressed onto the second foam adhesive so that the second foam adhesive is compressed to complete the sealing, resulting in a stable connection and good sealing effect. The IPM chip (three-phase intelligent power module) is a heat source with a relatively high heat generation within the hair dryer and is built into the air duct housing for cooling. The IPM wire is used to connect to the main control board of the hair dryer and is placed outside the air duct housing to avoid affecting the interior of the air duct housing.

[0011] Preferably, an IPM gland is provided on the outside of the IPM substrate. The IPM substrate is fixed between the IPM gland and the second limiting opening. Two limiting clips are fixed on both sides of the IPM gland. The air duct housing is provided with two limiting slots that match the second limiting clips. The IPM gland is engaged with the air duct housing through the cooperation of the second limiting clip and the second limiting slot. After the IPM module is installed on the side wall of the air duct housing, the IPM gland is clamped onto the outside of the IPM module using the cooperation of the second limiting clip and the second limiting slot to further protect and fix the IPM module. The installation is convenient and disassembly and maintenance are easy. An IPM gland notch is provided on the IPM gland, and the IPM wire is led out from the IPM gland notch.

[0012] Preferably, a heating element module is further provided inside the air duct housing, and the IGBT module and the IPM module are both placed between the heating element module and the fan, and the heating element module includes a heat-insulating sleeve fixed inside the air duct housing, and a heating air duct is provided inside the heat-insulating sleeve, and a heating element structure is installed inside the heating air duct, and a conductive sheet 1 and a conductive sheet 2 are fixed on the heating element structure, and the conductive sheet 1 and the conductive sheet 2 are both placed on the outer surface of the heat-insulating sleeve, and the conductive sheet 1 and the conductive sheet 2 are both fixed with connection terminals, and the outer wall of the heat-insulating sleeve and the inner wall of the air duct housing are sealed by a sealing rubber ring, and the sealing rubber rings are respectively placed at the two ends of the heat-insulating sleeve, and the connection terminals are located between the sealing rubber rings at both ends. The heating air duct inside the heat-insulating sleeve is connected to the interior of the air duct housing, and a sealing rubber ring is provided between the outer wall of the heat-insulating sleeve and the inner wall of the air duct housing as a seal to ensure that the high-speed airflow does not leak when passing through the heating element module. The heating element module has no connecting wires, and conductive sheet one and conductive sheet two are used as the connection terminals of the heating element module. Conductive sheet one and conductive sheet two are directly extended to the external space of the heating element to be connected to the external connection body by riveting. The interior of the air duct shell has no effect on the external connection body, and the external connection body is not in the heating air duct inside the insulation ring. There will be no electrical safety-related risks between them, thereby improving safety.

[0013] Preferably, the heating element structure includes a heating wire coil bracket placed on the inner side of the heating air duct, the heating wire coil bracket and the heating air duct are plugged and fixed, a thermal fuse, a thermal protector and a heating wire coil are fixed on the heating wire coil bracket, the conductive sheet 1 and the thermal fuse are electrically connected via a conductive rod 1, the thermal fuse and the thermal protector are electrically connected via a conductive rod 2, 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 sheet 2. The present invention abandons the traditional NTC temperature sensor and adopts dual thermal protection of a thermal fuse and a thermal protector for high temperature protection, thereby improving safety. The heating element structure on the inner side of the heating air duct eliminates the internal wiring and connection fixing structure, and the corresponding position can be saved, thereby making the diameter of the entire heating element module smaller, which can support a smaller fuselage, while avoiding the differences in wind speed and noise caused by the internal wiring.

[0014] Preferably, the heating wire coil support includes a plurality of heat-insulating sheets that are plugged and fixed to each other. The heat-insulating sheets evenly divide the heating air duct into a plurality of ventilation areas with the same cross-sectional shape. The outer wall of the heat-insulating sheet is provided with a winding groove that matches the heating wire coil. The heating wire coil is wound in the winding groove. The central axis of the heating wire coil coincides 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 design of the winding groove facilitates the winding of the heating wire coil on the plurality of heat-insulating sheets. The design of the heat dissipation gap ensures that the high-speed airflow can quickly cool the high temperature of the resistance wire.

[0015] Preferably, the thermal shield has a thermal protector mounting slot located on one side of the heat shield, near the air outlet of the duct housing. The slot is positioned along the central axis of the heating duct, and the thermal protector is positioned within the slot and securely connected to the thermal shield. This positioning of the thermal protector allows for real-time monitoring of the air outlet temperature of the duct housing, protecting the consumer's hair and preventing heat damage to the scalp.

[0016] Preferably, a thermal fuse mounting slot is provided in the center of the thermal insulation sheet, located at the inner center of the heating wire coil. The thermal fuse is placed within the slot and securely connected to the thermal insulation sheet. Due to the high temperature of the heating wire, placing the thermal fuse too close to the heating wire could cause it to prematurely blow if the temperature is insufficient, rendering the product unusable. The thermal fuse's position ensures a consistent distance between the thermal fuse and the winding's resistance wire, improving temperature monitoring accuracy and providing more precise protection.

[0017] The beneficial effects of the present invention are: it effectively avoids the disadvantage that the IGBT wires and IPM wires need to penetrate the air duct housing to be connected to the main control board of the hair dryer, and realizes a wireless design within the air duct housing; the interference effect of the IGBT wires and IPM wires on the air duct housing is minimized, and the impact on airflow and wind noise is also minimized; wiring, wiring and installation are simple; the connection is stable and the sealing effect is good; it is easy to install, disassemble and repair; safety is improved; the heating element structure can support a smaller body, while avoiding the difference in wind speed and noise caused by internal wiring; it can ensure that high-speed airflow quickly cools the high temperature of the resistance wire; it can monitor the temperature of the air outlet end of the air duct housing in real time, protect the safety of consumers' hair and avoid high-temperature damage to the scalp; the accuracy of temperature monitoring is improved, and protection is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded view of the present invention; Figure 2 It is the circuit connection diagram between high temperature components and main control board; Figure 3It is a stereogram of the air duct housing; Figure 4 It is a top view of the air duct housing; Figure 5 yes Figure 4 Partial cross-sectional view at AA in the middle; Figure 6 It is a three-dimensional diagram of the heating element structure; Figure 7 It is a partial exploded diagram of the heating element structure.

[0019] In the figure: 1. Air duct housing, 2. Fan, 3. Limit opening 1, 4. Limit opening 2, 5. Main control board, 6. Handle, 7. IGBT substrate, 8. Foam adhesive 1, 9. IGBT wire, 10. IGBT tube, 11. IGBT gland, 12. IPM substrate, 13. Foam adhesive 2, 14. IPM wire, 15. IPM chip, 16. IPM gland, 17. Thermal insulation ring, 18. Heating duct, 19. Conductive sheet 1, 20. Conductive sheet 2, 21. Terminal block, 22. Sealing rubber ring, 23. Thermal fuse, 24. Thermal protector, 25. Heating wire coil, 26. Thermal insulation sheet, 27. Winding groove, 28. Thermal fuse mounting slot, 29. Thermal protector mounting slot. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 and Figure 2 In the embodiment described, a wireless heat dissipation system for high-temperature components in a high-speed hair dryer includes: Air duct housing 1; The fan 2 is fixed inside the air duct housing 1 and is arranged between the air inlet end and the air outlet end of the air duct housing 1; A limiting opening 3 is provided on the side wall of the air duct housing 1, and the limiting opening 3 is provided between the fan 2 and the air outlet end of the air duct housing 1; The IGBT module is installed at the limit opening 3 and is sealed therewith; IGBT wire 9, provided on the IGBT module and located outside the air duct housing 1; The second limiting opening 4 is provided on the side wall of the air duct housing 1 and is provided between the fan 2 and the air outlet end of the air duct housing 1; The IPM module is installed at the limit opening 2 (4) and is sealed therewith; The IPM wire 14 is provided on the IPM module and is located outside the air duct housing 1; The main control board 5 is disposed outside the air duct housing 1 and is connected to the IGBT wires 9 and the IPM wires 14 .

[0022] The air duct housing 1 is connected to a handle 6 , and the main control board 5 is installed inside the handle 6 .

[0023] The IPM module and IGBT module are adjusted according to the airflow direction to minimize airflow obstruction, and the distance between the modules and the single machine is more than 5MM.

[0024] like Figure 3 、 Figure 4 and Figure 5 As shown, the IGBT module includes an IGBT substrate 7, and the outer edge of the limiting opening 3 is coated with a foam adhesive 8. The IGBT substrate 7 is bonded to the limiting opening 3 through the foam adhesive 8. The IGBT wire 9 is connected to the outer plate surface of the IGBT substrate 7. An IGBT tube 10 is fixed to the inner plate surface of the IGBT substrate 7. The IGBT tube 10 passes through the limiting opening 3 and is placed inside the air duct housing 1.

[0025] An IGBT gland 11 is provided on the outside of the IGBT substrate 7. The IGBT substrate 7 is fixed between the IGBT gland 11 and the limiting opening 3. Limiting clips 1 are fixed on both sides of the IGBT gland 11. The air duct housing 1 is provided with a limiting slot 1 that matches the limiting clip 1. The IGBT gland 11 is engaged with the air duct housing 1 through the cooperation of the limiting clip 1 and the limiting slot 1. The IGBT gland 11 is provided with an IGBT gland notch, and the IGBT wire 9 is led out from the IGBT gland notch.

[0026] The IPM module includes an IPM substrate 12, and the outer edge of the limiting opening 4 is coated with a foam adhesive 13. The IPM substrate 12 is bonded to the limiting opening 4 through the foam adhesive 13. The IPM wire 14 is connected to the outer panel surface of the IPM substrate 12. An IPM chip 15 is fixed on the inner panel surface of the IPM substrate 12. The IPM chip 15 passes through the limiting opening 4 and is placed inside the air duct housing 1.

[0027] There are two IPM baseplates (the number of second limit openings matches the number of IPM baseplates). One IPM baseplate has an IPM chip mounted on it, and the other has two IPM chips mounted on it. The two IPM baseplates are connected by an FPC cable. Wires connected to the fan are fixed to the inner surface of the IPM baseplates. Before the IPM baseplates are bonded, they are inserted through the second limit opening and into the fan. A wire groove is also provided on the inner wall of the duct housing to secure the wires, minimizing their impact on the interior of the duct housing.

[0028] An IPM gland 16 is provided on the outside of the IPM substrate 12. The IPM substrate 12 is fixed between the IPM gland 16 and the second limiting opening 4. Two limiting clips are fixed on both sides of the IPM gland 16. The air duct housing 1 is provided with a second limiting slot that matches the second limiting clip. The IPM gland 16 is engaged with the air duct housing 1 through the cooperation of the second limiting clip and the second limiting slot. The IPM gland 16 is provided with an IGBT gland notch, and the IPM wire 14 is led out from the IGBT gland notch.

[0029] like Figure 1 、 Figure 6 and Figure 7 As shown, a heating element module is also provided inside the air duct housing 1, and the IGBT module and the IPM module are both placed between the heating element module and the fan 2. The heating element module includes a heat-insulating ring 17 fixed inside the air duct housing 1, and a heating air duct 18 is provided on the inner side of the heat-insulating ring 17. A heating element structure is installed in the heating air duct 18, and a conductive sheet 19 and a conductive sheet 2 20 are fixed on the heating element structure. The conductive sheet 19 and the conductive sheet 2 20 are both placed on the outer surface of the heat-insulating ring 17, and the conductive sheet 1 19 and the conductive sheet 2 20 are both riveted and fixed with terminal blocks 21. The outer wall of the heat-insulating ring 17 and the inner wall of the air duct housing 1 are sealed by a sealing rubber ring 22. The sealing rubber rings 22 are respectively placed at both ends of the heat-insulating ring 17, and the terminal blocks 21 are located between the sealing rubber rings 22 at both ends.

[0030] The heating element structure includes an electric heating wire coil bracket placed on the inner side of the heating air duct 18. The electric 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 electric heating wire coil bracket. The conductive sheet 19 and the thermal fuse 23 are electrically connected through a conductive rod 1 and fixed by riveting. The thermal fuse 23 and the thermal protector 24 are electrically connected through a conductive rod 2 and fixed by riveting. The thermal protector 24 is electrically connected to one end of the electric heating wire coil 25 and fixed by riveting. The other end of the electric heating wire coil 25 is electrically connected to the conductive sheet 2 20 and fixed by riveting.

[0031] The heating wire coil support includes three interlocking insulation sheets 26, spaced 60 degrees apart. These divide the heating duct 18 into six ventilation zones with identical cross-sectional shapes. Winding grooves 27 matching the heating wire coils 25 are provided on the outer walls of the insulation sheets 26. The spacing between the winding grooves 27 is 1.5 mm. The heating wire coils 25 are wound within these grooves, with a 1.5 mm spacing between each coil. The central axis of the heating wire coils 25 coincides with the central axis of the heating duct 18. A heat dissipation gap 28 is provided between the heating wire coils 25 and the inner wall of the heating duct 18, with a range of 1.5 mm to 2 mm. The heating wire coils 25 can be made of various materials, with a deep corrugated wire diameter of 0.4 mm to 0.45 mm, and are wound on the spacers using a single-wire method.

[0032] A thermal protector mounting groove 29 is provided on one side of the thermal insulation sheet 26 close to the air outlet end of the air duct housing 1 . The thermal protector mounting groove 29 is located on the central axis of the heating air duct 18 . The thermal protector 24 is placed in the thermal protector mounting groove 29 and fixedly connected to the thermal insulation sheet 26 .

[0033] A thermal fuse mounting slot 28 is provided in the middle of the heat insulating sheet 26 and is located at the inner center of the heating wire coil 25 . The thermal fuse 23 is placed in the thermal fuse mounting slot 28 and is fixedly connected to the heat insulating sheet 26 .

[0034] When installing the IGBT module, the outer edges of the retaining opening 3 are bonded with high-density foam adhesive 8. The flat surface of the IGBT substrate 7 is then pressed against the foam adhesive 8, compressing it to create a seal. The IGBT gland 11 is then secured to the outside of the IGBT module using the retaining clip 1 and retaining slot 1, further protecting and securing the module. After the IGBT module is installed, the IGBT tube 10 (thyristor) is internally housed in the air duct housing 1 for cooling. The IGBT wires 9 are externally placed in the air duct housing 1 and connected to the main control board 5.

[0035] When installing the IPM module, the outer edges of the retaining opening 4 are bonded with high-density foam adhesive 13. Before attaching the IPM substrate 12, the wires on the inner surface of the IPM substrate 12 are inserted through the retaining opening 4 and into the fan 2 (a corresponding wire retaining slot is also provided on the inner wall of the duct housing 1 to secure the wires). The flat surface of the IPM substrate 12 is then pressed against the foam adhesive 13, compressing it and sealing it. The IPM cover 16 is then snapped onto the outside of the IPM module using the retaining clip 2 and retaining slot 2 to further secure and protect it. After the IPM module is installed, the IPM chip 15 (three-phase intelligent power module) is internally housed in the duct housing 1 for cooling, while the IPM wires 14 are externally located in the duct housing 1 and connected to the main control board 5.

[0036] The present invention sets a limit opening 1 3 and a limit opening 2 4 on the side wall of the air duct housing 1, so that the IGBT module and the IPM module are sealed and installed at the limit opening 1 3 and the limit opening 2 4 respectively, and the heating parts of the IGBT module and the IPM module are built into the inner side of the air duct housing 1, and the wire parts of the IGBT module and the IPM module are placed outside the outside of the air duct housing 1, which effectively avoids the deficiency that the IGBT wire 9 and the IPM wire 14 need to penetrate the air duct housing 1 to be connected to the main control board 5 of the hair dryer, and realizes the wireless design in the air duct housing 1. On the one hand, the interference effect of the IGBT wire 9 and the IPM wire 14 on the air duct housing 1 is minimized, and the effect on the airflow and wind noise is also minimized. On the other hand, the wiring of the IGBT wire 9 and the IPM wire 14 are all outside the air duct, which makes wiring, wiring and installation simple.

[0037] When assembling the heating element module, first install the thermal fuse 23 into the thermal fuse installation groove 28 at the middle position of the thermal insulation sheet 26, then plug all the thermal insulation sheets 26 into each other and fix them to form a heating wire coil bracket, then install the thermal protector 24 into the thermal protector installation groove 29 at the end position of the thermal insulation sheet 26, wind the heating wire coil 25 around the outside of the heating wire coil bracket and fix it to the heating wire coil bracket by riveting (a winding groove 27 matching the heating wire coil 25 is provided on the outer wall of the thermal insulation sheet 26), and rivet the conductive sheet 19 and the conductive sheet 20 to the heating wire. On the coil bracket, a pair of conductive rods are then used to electrically connect the conductive sheet 19 to the thermal fuse 23 and fix them by riveting. The thermal fuse 23 and the thermal protector 24 are electrically connected to each other by riveting. The thermal protector 24 is then electrically connected to one end of the heating wire coil 25 and fixed by riveting. The other end of the heating wire coil 25 is electrically connected to the conductive sheet 2 20 and fixed by riveting. This completes the assembly of the heating element structure. Finally, the thermal insulation ring 17 is placed on the outside of the heating element structure to complete the assembly of the entire heating element module. The heating wire coil bracket composed of the thermal insulation plate 26 will evenly divide the heating air duct 18 inside the thermal insulation ring 17 into several ventilation areas with the same cross-sectional shape. The conductive sheet 19 and the conductive sheet 2 20 are both placed on the outer surface of the thermal insulation ring 17 to facilitate external wiring.

[0038] To install the heating element module, first place the sealing rubber rings 22 on both ends of the insulation collar 17. Then, assemble the entire heating element module into the corresponding position inside the air duct housing 1 and electrically connect it to the external wires via the conductive sheet 19 and conductive sheet 2 20. The IGBT module (IPM module) is located between the heating element module and the fan 2.

[0039] The heating element module of the present invention adopts a method without internal wiring, and uses conductive sheet 1 19 and conductive sheet 2 20 as the wiring terminals of the heating element module. Conductive sheet 19 and conductive sheet 2 20 are directly extended to the external space of the heating element module to be connected to the external wiring body by riveting. The interior of the air duct shell 1 does not have any impact on the external wiring body, and the external wiring body is not in the heating air duct 18 on the inner side of the insulation ring 17. There will be no electrical safety-related risks between each other. Moreover, since the internal wiring routing and connection fixing structure are removed, the corresponding position can be saved, so that the diameter of the entire heating element module is smaller, which can support a smaller fuselage implementation, while avoiding the difference in wind speed and noise caused by internal wiring. The present invention abandons the traditional NTC temperature sensor and adopts the dual thermal protection of thermal fuse 23 and thermal protector 24 for high temperature protection, thereby improving safety.

Claims

1. A wireless heat dissipation system for high-temperature components in a high-speed hair dryer, characterized by: include: Air duct housing (1); A fan (2) is fixed inside the air duct housing (1), and the fan (2) is arranged between the air inlet end of the air duct housing (1) and the air outlet end of the air duct housing (1); A limiting opening (3) is provided on the side wall of the air duct housing (1), and the limiting opening (3) is provided between the fan (2) and the air outlet end of the air duct housing (1); An IGBT module is installed at one of the limit openings (3) and is sealed therewith; An IGBT wire (9) is provided on the IGBT module and is located outside the air duct housing (1); The second limiting opening (4) is provided on the side wall of the air duct housing (1), and the second limiting opening (4) is provided between the fan (2) and the air outlet end of the air duct housing (1); An IPM module is installed at the second limit opening (4) and is sealed therewith; An IPM wire (14) is provided on the IPM module and is located outside the air duct housing (1); A main control board (5) is arranged outside the air duct housing (1) and is connected to the IGBT wire (9) and the IPM wire (14).

2. The wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to claim 1, characterized in that: The IGBT module includes an IGBT substrate (7), the outer edge of the limiting opening (3) is coated with a foam adhesive (8), the IGBT substrate (7) is bonded to the limiting opening (3) through the foam adhesive (8), the IGBT wire (9) is connected to the outer plate surface of the IGBT substrate (7), an IGBT tube (10) is fixed on the inner plate surface of the IGBT substrate (7), and the IGBT tube (10) passes through the limiting opening (3) and is placed inside the air duct housing (1).

3. The wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to claim 2, characterized in that: An IGBT cover (11) is provided on the outside of the IGBT substrate (7), the IGBT substrate (7) is fixed between the IGBT cover (11) and a limiting opening (3), a limiting buckle (1) is fixed on both sides of the IGBT cover (11), a limiting slot (1) matching the limiting buckle (1) is provided on the air duct housing (1), and the IGBT cover (11) is connected to the air duct housing (1) through the cooperation of the limiting buckle (1) and the limiting slot (1).

4. The wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to claim 1, characterized in that: The IPM module includes an IPM substrate (12), the outer edge of the second limiting opening (4) is coated with a second foam adhesive (13), the IPM substrate (12) is bonded to the second limiting opening (4) through the second foam adhesive (13), the IPM wire (14) is connected to the outer plate surface of the IPM substrate (12), an IPM chip (15) is fixed on the inner plate surface of the IPM substrate (12), and the IPM chip (15) passes through the second limiting opening (4) and is placed inside the air duct housing (1).

5. The wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to claim 4, characterized in that: An IPM pressure cover (16) is provided on the outside of the IPM substrate (12), and the IPM substrate (12) is fixed between the IPM pressure cover (16) and the second limiting opening (4). Two limiting clips are fixed on both sides of the IPM pressure cover (16), and a second limiting slot matching the second limiting clip is provided on the air duct housing (1). The IPM pressure cover (16) is connected to the air duct housing (1) through the cooperation of the second limiting clip and the second limiting slot.

6. A wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to any one of claims 1 to 5, characterized in that: A heating element module is further provided inside the air duct housing (1), and the IGBT module and the IPM module are both placed between the heating element module and the fan (2). The heating element module includes a heat-insulating collar (17) fixed inside the air duct housing (1), and a heating air duct (18) is provided inside the heat-insulating collar (17). A heating element structure is installed in the heating air duct (18), and a conductive sheet 1 (19) and a conductive sheet 2 (20) are fixed on the heating element structure. The conductive sheet 1 (19) and the conductive sheet 2 (20) are both placed on the outer surface of the thermal insulation ring (17), and the conductive sheet 1 (19) and the conductive sheet 2 (20) are both fixed with a terminal (21), and the outer wall of the thermal insulation ring (17) and the inner wall of the air duct shell (1) are sealed by a sealing rubber ring (22), and the sealing rubber ring (22) is respectively placed at the two ends of the thermal insulation ring (17), and the terminal (21) is located between the sealing rubber rings (22) at the two ends.

7. The wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to claim 6, characterized in that: 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, and 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 1 (19) and the thermal fuse (23) are electrically connected through a conductive rod 1, and the thermal fuse (23) and the thermal protector (24) are electrically connected through a conductive rod 2. The thermal protector (24) is electrically connected to one end of the heating wire coil (25), and the other end of the heating wire coil (25) is electrically connected to the conductive sheet 2 (20).

8. The wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to claim 7, characterized in that: The heating wire coil bracket includes a plurality of heat insulating sheets (26) that are plugged and fixed to each other. The heat insulating sheets (26) evenly divide the heating air duct (18) into a plurality of ventilation areas with the same cross-sectional shape. A winding groove (27) that matches the heating wire coil (25) is provided on the outer wall of the heat insulating sheet (26). 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).

9. The wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to claim 8, characterized in that: A thermal protector mounting groove (29) is provided on one side of the thermal insulation sheet (26) close to the air outlet end of the air duct housing (1). The thermal protector mounting groove (29) is located on the central axis of the heating air duct (18). The thermal protector (24) is placed in the thermal protector mounting groove (29) and is fixedly connected to the thermal insulation sheet (26).

10. The wireless heat dissipation system for high-temperature components in a high-speed hair dryer according to claim 8, characterized in that: A thermal fuse mounting groove (28) is provided in the middle of the thermal 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 thermal insulation sheet (26).

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