A heating frame structure for a wind tube

Abstract

The utility model provides a kind of air duct heating frame structure, including heating frame body and be set on the far infrared temperature detecting device, far infrared emission device and control assembly of the heating frame body;Located the axis P of the heating frame body two ends are sequentially provided with air outlet end and air inlet end, from the air outlet end to the direction of the air inlet end, the far infrared temperature detecting device, far infrared emission device and the control assembly are sequentially arranged;Temperature detecting device and emission device are integrated in the containing cavity of heating frame body, reduce installation space while increasing the flow area of airflow, reduce the flow resistance of airflow, enhance the heat dissipation effect;SCR is annularly spaced on the heating frame body around the axis P of the heating frame body, reduce the number of electronic wire, reduce the risk of electronic wire wind blocking, and expand the heat dissipation area of SCR, enhance the heat dissipation effect to SCR.

Description

Technical Field

[0001] This utility model belongs to the field of beauty and hairdressing, and specifically relates to a heating element structure for a hair dryer. Background Technology

[0002] In existing duct heating frame structures, the temperature detection device is often installed off-center from the air outlet, making it impossible to accurately monitor the actual airflow temperature directed at the user, leading to measurement lag or inaccuracies. Heating components mostly use traditional resistance wires, which have low heat conduction efficiency, high heat loss, and lack effective isolation from the temperature detection device, making them prone to interference. The thyristor, as the core component for power control, is often densely packed and close to the heating area, resulting in insufficient heat dissipation, affecting operational stability and lifespan. Furthermore, the overall structural design is loose, with a lack of integration between functional modules (temperature measurement, heating, and control), occupying a large amount of internal space in the duct and presenting problems such as complex assembly processes and insufficient reliability of component connections, making it difficult to meet the design requirements of miniaturized and high-efficiency ducts. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] This utility model provides a heating element structure for a fan duct, which aims to solve the problem of bulky structure.

[0005] (2) Technical solution

[0006] This utility model provides a heating frame structure for a wind tunnel, including a heating frame body and a far-infrared temperature detection device, a far-infrared emitting device and a control component disposed on the heating frame body;

[0007] The heating frame body has an air outlet and an air inlet at its two ends on the axis P. The far-infrared temperature detection device, the far-infrared emitting device and the control component are arranged in sequence from the air outlet to the air inlet.

[0008] Furthermore, the control component includes at least two thyristors, and each of the thyristors is arranged annularly on the heating frame body around the axis P of the heating frame body.

[0009] Furthermore, both the far-infrared temperature detection device and the far-infrared emitting device are mounted on the axis P.

[0010] Furthermore, the heating frame body includes a first heating plate and a second heating plate. The first heating plate and the second heating plate are arranged crosswise to form a pair of first clamps and a pair of second clamps arranged symmetrically. The first clamps and the second clamps enclose a receiving cavity with an opening facing the air outlet end. The far-infrared temperature detection device and the far-infrared emitting device are snapped into the receiving cavity.

[0011] Furthermore, the far-infrared emitting device includes an emitting bracket, a resistor disposed within the emitting bracket, and at least one heat-conducting block. The resistor and the heat-conducting block are in contact. The resistor is a PTC thermistor, and the heat-conducting block is a carbon fiber.

[0012] Furthermore, two heat-conducting blocks are provided, and the resistor is sandwiched between the two heat-conducting blocks.

[0013] Furthermore, the far-infrared temperature detection device includes a temperature detection bracket and a temperature detection component disposed within the temperature detection bracket. The emitting bracket is provided with a second slot corresponding to the first clamping plate or the second clamping plate, and the temperature detection bracket is provided with a first slot corresponding to the first clamping plate or the second clamping plate.

[0014] Furthermore, a heat insulation block is also placed between the far-infrared temperature detection device and the far-infrared emitting device.

[0015] Furthermore, there are three thyristors, which are respectively disposed on the first clamping plate and the second clamping plate, which are independent of each other.

[0016] Furthermore, the thyristor includes a base and a mounting platform. Both the first heating plate and the second heating plate are provided with through holes. The base is fitted into the through holes. The mounting platform is also provided with mounting holes for riveting connection with the first heating plate or the second heating plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] The temperature sensing device and the transmitting device are integrated into the housing cavity of the heating frame body, which reduces the installation space while increasing the airflow area, reducing airflow resistance, and enhancing the heat dissipation effect. The thyristors are arranged in a ring around the axis P of the heating frame body, which reduces the number of electron wires, reduces the risk of air blockage of electron wires, and expands the heat dissipation area of ​​the thyristors, thus enhancing the heat dissipation effect of the thyristors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0020] Figure 2 This is an exploded view of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0022] Figure 4 This is a schematic diagram of the heating frame body structure of this utility model.

[0023] Figure 5 This is an exploded view of the far-infrared emitting device of this utility model.

[0024] Figure 6 This is a cross-sectional view of the far-infrared emitting device and the far-infrared temperature sensing device of this utility model.

[0025] Figure 7 This is an exploded view of the far-infrared temperature detection device of this utility model.

[0026] Figure 8 This is a schematic diagram of the installation of the thyristor of this utility model. Figure 1 .

[0027] Figure 9 This is a schematic diagram of the installation of the thyristor of this utility model. Figure 2 .

[0028] Figure 10 This is a schematic diagram of the card slot structure of this utility model.

[0029] Reference numerals: 1-Heating frame body, 11-First heating plate, 111-First clamping plate, 12-Second heating plate, 121-Second clamping plate, 13-Air outlet, 14-Air inlet, 15-Accommodation cavity, 16-Through hole, 161-Fixing hole, 17-Heating wire, 2-Far-infrared temperature detection device, 21-Temperature detection bracket, 22-Temperature detection component, 23-Lamp cover, 24-Fixing bracket, 25-Sensor, 26-Heat insulation block, 27-First slot, 28-Temperature detection cavity, 3-Far-infrared emitting device, 31-Emitting bracket, 32-Resistor, 33-Heat conducting block, 34-Spring, 35-Second slot, 36-Emitting cavity, 4-Control component, 41-SCR, 42-Base, 43-Mounting platform, 431-Mounting hole. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] like Figure 1-3As shown, this utility model provides a heating frame structure for a duct, including a heating frame body 1, and a far-infrared temperature detection device 2, a far-infrared emitting device 3, and a control component 4 disposed on the heating frame body 1. An air outlet 13 and an air inlet 14 are sequentially provided at both ends of the axis P of the heating frame body 1. The heating frame structure is an internal device of the duct. The air outlet 13 is close to the air outlet of the duct, and the air inlet 14 is close to the air inlet of the duct. The airflow of the duct flows from the air inlet 14 to the air outlet 13. Along the length of the heating frame body 1, the far-infrared temperature detection device 2, the far-infrared emitting device 3, and the far-infrared emitting device 4 are positioned... The infrared emitting device 3 and the silicon controlled rectifier 41 are arranged in sequence. The far-infrared temperature detection device 2 is located at the front end near the air outlet 13, the silicon controlled rectifier 41 is located at the rear end near the air inlet 14, and the far-infrared emitting device 3 is located between the two. The far-infrared temperature detection device 2 and the far-infrared emitting device 3 are both located on the axis P. The control component 4 includes three silicon controlled rectifiers 41. The three silicon controlled rectifiers 41 are arranged in a ring around the axis P of the heating frame body 1. The outer wall of the heating frame body 1 is also provided with a serrated structure, and the serrated structure is covered with a heating wire 17.

[0032] For heat dissipation, when the hair dryer is in use, cold air flows in from the air inlet 14, passes sequentially through the silicon controlled rectifier 41, the far-infrared emitting device 3, and the far-infrared temperature sensing device 2, and finally exits from the air outlet 13. At this time, since the far-infrared temperature sensing device 2 is located at the front end of the heating frame body 1 (close to the air outlet), the temperature measurement is more accurate. The far-infrared emitting device 3 is centrally located to ensure that the airflow can fully absorb the released heat energy when it flows through, maximizing thermal efficiency and reducing heat loss. The silicon controlled rectifier 41 is arranged at the rear end (close to the air inlet), so that the unheated cold airflow preferentially flows through the silicon controlled rectifier 41. Since the silicon controlled rectifier 41 generates heat when it is working, the cold airflow can effectively cool it. At the same time, this layout avoids the risk that the temperature of the silicon controlled rectifier 41 will rise further when the heated airflow flows through it. Therefore, this layout further improves the heat dissipation efficiency of the electronic components in the heating frame body 1 and effectively improves the service life of the hair dryer.

[0033] Regarding the installation space, the far-infrared temperature detection device 2 and the far-infrared emitting device 3 are snapped into the heating frame body 1, and the three thyristors 41 are embedded in the heating frame body 1. This compact design greatly reduces the installation space required inside the air duct. At the same time, the three core functional modules of temperature measurement, heating and power control are carefully arranged in the narrow space according to the functional logic (temperature measurement first -> heating in the middle -> control last) and heat dissipation requirements (thyristors are distributed), which achieves a high degree of functional integration and meets the design requirements of miniaturization and lightweighting of modern hair styling appliances.

[0034] Specifically, such as Figure 4 As shown, in one embodiment of this utility model, the heating frame body 1 includes a first heating plate 11 and a second heating plate 12. The first heating plate 11 and the second heating plate 12 are cross-arranged to form a pair of symmetrically arranged first clamping plates 111 and a pair of second clamping plates 121. The first clamping plates 111 and the second clamping plates 121 enclose a receiving cavity 15. The opening of the receiving cavity 15 faces the direction of the air outlet 13. The far-infrared temperature detection device 2 and the far-infrared emitting device 3 are fixedly installed in the receiving cavity 15 by a snap-fit ​​method. The core advantage of this structural design is that, in terms of airflow resistance, compared with the traditional method of directly connecting the far-infrared temperature detection device 2 and the far-infrared emitting device 3... The far-infrared temperature detection device 2 and the far-infrared emitting device 3 are installed on the surface of the heating frame body 1. In this embodiment, the far-infrared temperature detection device 2 and the far-infrared emitting device 3 are snapped into the receiving cavity 15, so that the far-infrared temperature detection device 2 and the far-infrared emitting device 3 overlap with at least part of the heating frame body 1, thereby increasing the airflow area and reducing the airflow resistance. This significantly improves the airflow effect and heat dissipation effect of the blower. At the same time, the two functional modules of temperature detection and heating are directly integrated into the front end structure of the heating frame body 1. This design achieves an ultra-compact layout and further optimizes the internal space utilization of the blower.

[0035] Specifically, such as Figure 5-6 As shown, in one embodiment of this utility model, the far-infrared emitting device 3 consists of an emitting bracket 31, a resistor 32, and two heat-conducting blocks 33. The resistor 32 is a PTC thermistor with a positive temperature coefficient, and the heat-conducting blocks 33 are made of carbon fiber with high thermal conductivity. The emitting bracket 31 has an emitting cavity 36 inside, and the resistor 32 and the two heat-conducting blocks 33 are fixedly installed in the emitting cavity 36. The resistor 32 is sandwiched between the two heat-conducting blocks 33, and both sides of the resistor 32 are in full contact with the heat-conducting blocks 33 to maximize the effective contact area. This structure ensures that the heat generated by the PTC resistor 32 during operation can be efficiently and evenly conducted to the carbon fiber heat-conducting blocks 33 on both sides. The high thermal conductivity of the carbon fiber combined with the double-sided contact design significantly improves the overall heat conduction efficiency and provides a stable heat source for far-infrared radiation.

[0036] The specific combination of PTC and carbon blocks is as follows: After being energized, the PTC element heats up due to its positive temperature coefficient. In the initial stage, the PTC resistance is low, and it heats up rapidly when current flows through it, generating a large amount of heat. The carbon block, on the other hand, has excellent thermal conductivity and heat storage properties, enabling it to quickly absorb and conduct heat after the PTC heats up, causing its own temperature to rise rapidly as well. The combination of the two allows a high temperature to be reached in a short time, promoting the emission of far-infrared rays.

[0037] As the temperature rises, the resistance of the PTC increases and the heating power decreases. At this time, the carbon block, which has accumulated heat, will slowly release it to replenish the heat lost due to the reduced heating of the PTC, maintain the overall heating level of the device, and ensure the continuity and stability of far-infrared emission.

[0038] Furthermore, such as Figure 5-6 As shown, in addition to the resistor 32 and the heat-conducting block 33, the emission cavity of the emission bracket 31 also integrates and fixes a spring piece 34. The spring piece 34 is disposed on the outside of one of the heat-conducting blocks 33, and its elastic pressure direction is between the inner side wall of the emission cavity and the side wall of the heat-conducting block 33. Through the continuous pressing force generated by elastic deformation, the resistor 32 and the two heat-conducting blocks 33 are firmly pressed into a predetermined position in the emission cavity, ensuring close contact between the two sides of the resistor 32 and the heat-conducting block 33, and between the heat-conducting block 33 and the inner wall of the emission cavity. This effectively prevents the components from shifting or falling off under vibration or impact conditions, significantly improves the structural reliability and long-term stability of the device, maintains the contact pressure of the thermal interface, and ensures the durability of heat conduction efficiency.

[0039] Specifically, such as Figure 6-7 As shown, in one embodiment of this utility model, the far-infrared temperature detection device 2 is composed of a temperature detection bracket 21 and a temperature detection component 22. The temperature detection bracket 21 is provided with a temperature detection cavity 28, the opening of which faces the air outlet 13. The temperature detection component 22 is installed inside the temperature detection cavity 28. The temperature detection component 22 includes, in sequence, a lampshade 23, a fixing bracket 24, and a sensor 25. The lampshade 23 is located on the outermost side of the temperature detection cavity (i.e., close to the air outlet 13). The lampshade 23 is fixed to the front end face of the fixing bracket 24 by a snap-fit ​​method. At the same time, the lampshade 23 and the fixing bracket 24 form a hollow structure. The sensor 25 is fixed inside the hollow structure, which improves the installation stability of the sensor 25.

[0040] Furthermore, such as Figure 6-7 As shown, a heat insulation block 26 is also provided between the temperature sensing bracket 21 and the far-infrared emitting device 3. The heat insulation block 26 is made of silicone (which has excellent heat insulation and elastic sealing performance). In the assembled state, one end of the heat insulation block 26 is snapped into the temperature sensing bracket 21, and the other end is in contact with the far-infrared emitting device 3. This makes the heat insulation block 26 form a physical isolation and heat insulation barrier between the temperature sensing bracket 21 and the emitting device 3, effectively preventing the heat generated by the infrared emitting device 3 from being transferred to the temperature sensing device 2, minimizing the interference of external heat sources on the sensor 25, and ensuring the accuracy of temperature detection data.

[0041] Specifically, such as Figure 8-9As shown, in one embodiment of this utility model, three thyristors 411 are respectively disposed on the independent first clamping plate 111 and the second clamping plate 121. The ends of the first clamping plate 111 and the second clamping plate 121 near the air inlet end 14 are provided with through holes 16, and the included angle between adjacent through holes 16 is 90 degrees. The three thyristors 41 are respectively embedded in the through holes 16. The 90-degree interval of the through holes 16 ensures that the thyristors 41 form sufficient spacing space at the tail of the heating frame. This design effectively avoids the problem of heat accumulation caused by the dense arrangement of the thyristors 41. Combined with the fact that the cold airflow at the air inlet end 14 preferentially flows through the thyristors 41, the heat dissipation efficiency and working reliability of the thyristors are significantly improved.

[0042] Furthermore, such as Figure 8-9 As shown, each of the thyristors 41 includes a base 42 and a mounting platform 43. The mounting platform 43 is provided with a mounting hole 431 and a fixing hole 161 is provided on one side of the through hole 16. During installation, the base 42 of the thyristor 41 is inserted into the corresponding through hole 16. This step ensures that the mounting hole 431 on the mounting platform 43 automatically aligns with the fixing hole 161 on one side of the through hole 16. A rivet is used to simultaneously penetrate the mounting hole 431 and the fixing hole 161 and lock them together. Through the dual fixing mechanism of "pre-positioning by snap-fit ​​+ fastening by riveting", the thyristor 41 is stably and reliably installed in the through hole 16, effectively resisting the risk of loosening caused by vibration or thermal expansion and contraction.

[0043] Specifically, such as Figure 10 As shown, in one embodiment of this utility model, the outer wall surfaces of the launch bracket 31 and the temperature probe bracket 21 are respectively provided with multiple sets of second slots 35 and multiple sets of first slots 27. The layout of the second slots 35 and the first slots 27 precisely corresponds to the positions of the two first clamping plates 111 and the two second clamping plates 121. During assembly, the first clamping plates 111 and the second clamping plates 121 are directly snapped into the corresponding second slots 35 and first slots 27 on the outer wall of the launch bracket 31 and the temperature probe bracket 21, achieving precise positioning and rapid assembly. This ensures that the launch bracket 31 and the temperature probe bracket 21 are accurately and stably positioned on the heating frame body 1, greatly improving assembly efficiency. The snap-fit ​​connection method does not require additional fasteners, maximizing the high integration and space utilization of the front-end receiving cavity 15 area.

[0044] The working principle of this utility model is explained in detail below:

[0045] When the air duct is working, the cold air enters from the air inlet 14 and flows first through the control component 4. The cold air forces convection to dissipate heat from the high-heat base 42. Then the cold air flows through the centrally located far-infrared emitting device 3 and the far-infrared temperature detection device 2 to achieve effective heat dissipation of the far-infrared emitting device 3 and the far-infrared temperature detection device 2.

[0046] Meanwhile, the resistor 32 of the far-infrared emitting device 3 is energized and heats up, and the heat-conducting block 33 emits far-infrared radiation evenly after being heated to protect the user's hair; the far-infrared temperature detection device 2 detects the temperature of the user's hair by emitting infrared light, so as to avoid the user from being uncomfortable due to excessive hair temperature, thereby further improving the user experience.

[0047] The innovation of this utility model lies in:

[0048] The temperature sensing device and the transmitting device are integrated into the housing cavity of the heating frame body, which reduces the installation space while increasing the airflow area, reducing airflow resistance, and enhancing the heat dissipation effect. The thyristors are arranged in a ring around the axis P of the heating frame body, which reduces the number of electron wires, reduces the risk of air blockage of electron wires, and expands the heat dissipation area of ​​the thyristors, thus enhancing the heat dissipation effect of the thyristors.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A heating element structure for a fan duct, characterized in that, It includes a heating frame body (1) and a far-infrared temperature detection device (2), a far-infrared emitting device (3) and a control component (4) disposed on the heating frame body (1). Among them, an air outlet (13) and an air inlet (14) are provided at both ends of the axis P of the heating frame body (1). The far-infrared temperature detection device (2), the far-infrared emitting device (3) and the control component (4) are arranged in sequence from the air outlet (13) to the air inlet (14).

2. The structure of a fan duct heating frame according to claim 1, characterized in that, The control component (4) includes at least two thyristors (41), and each of the thyristors (41) is arranged in a ring around the axis P of the heating frame body (1) on the heating frame body (1).

3. The structure of a fan duct heating frame according to claim 2, characterized in that, Both the far-infrared temperature detection device (2) and the far-infrared emitting device (3) are mounted on the axis P.

4. The structure of a fan duct heating frame according to claim 3, characterized in that, The heating frame body (1) includes a first heating plate (11) and a second heating plate (12). The first heating plate (11) and the second heating plate (12) are arranged crosswise to form a pair of first clamps (111) and a pair of second clamps (121) arranged symmetrically. The first clamps (111) and the second clamps (121) enclose a receiving cavity (15) with the opening facing the air outlet (13). The far-infrared temperature detection device (2) and the far-infrared emitting device (3) are snapped into the receiving cavity (15).

5. The structure of a fan duct heating frame according to claim 4, characterized in that, The far-infrared emitting device (3) includes an emitting bracket (31), a resistor (32) and at least one heat-conducting block (33) disposed in the emitting bracket (31). The resistor (32) and the heat-conducting block (33) are in contact. The resistor (32) is a PTC thermistor and the heat-conducting block (33) is a carbon material.

6. The structure of a fan duct heating frame according to claim 5, characterized in that, Two heat-conducting blocks (33) are provided, and the resistor (32) is sandwiched between the two heat-conducting blocks (33).

7. The structure of a fan duct heating frame according to claim 5, characterized in that, The far-infrared temperature detection device (2) includes a temperature detection bracket (21) and a temperature detection component (22) disposed in the temperature detection bracket (21). The transmitting bracket (31) is provided with a second slot (35) corresponding to the first clamping plate (111) or the second clamping plate (121), and the temperature detection bracket (21) is provided with a first slot (27) corresponding to the first clamping plate (111) or the second clamping plate (121).

8. The structure of a fan duct heating frame according to claim 7, characterized in that, A heat insulation block (26) is also abutting between the far-infrared temperature detection device (2) and the far-infrared emitting device (3).

9. The structure of a fan duct heating frame according to claim 4, characterized in that, There are three thyristors (41), which are respectively disposed on the first clamping plate (111) and the second clamping plate (121) that are independent of each other.

10. The structure of a fan duct heating frame according to claim 4, characterized in that, The thyristor (41) includes a base (42) and a mounting platform (43). Both the first heating plate (11) and the second heating plate (12) are provided with through holes (16). The base (42) is fitted into the through holes (16). The mounting platform (43) is also provided with mounting holes (431) that are riveted to the first heating plate (11) or the second heating plate (12).

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