A heating sheet having a stable structure
The heating wire is clamped and fixed by the upper cover ring and the lower base. The expansion space and buffer medium stabilize the heating wire, which solves the problems of deformation and vibration caused by thermal expansion and contraction of the heating wire and the opposite direction of current. This achieves structural stability and quiet operation of the heating equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN CHANGAN FENGMAO ELECTRONIC PRODUCTS FACTORY
- Filing Date
- 2025-07-22
- Publication Date
- 2026-06-23
AI Technical Summary
In existing heating equipment, the deformation and vibration of the heating wire due to thermal expansion and contraction and the opposite direction of current affect the stability and safety of the equipment.
The heating wire is held and fixed by the upper cover ring and the lower base. The heating wire is stabilized by the expansion space and the buffer medium. Deformation and vibration are avoided by the support pins and the buffer medium. The heating wire is ensured to be unobstructed during the expansion process, and stable current is delivered through the conductive end and the wiring pin.
It achieves structural stability of the heating wire at high temperatures, avoiding deformation and noise, ensuring the safety and reliability of the heating equipment, and is suitable for continuous output of heating temperature of 550℃ under 24V, 3A DC power supply environment.
Smart Images
Figure CN224401691U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating element technology, and specifically to a heating element with a stable structure. Background Technology
[0002] Common heating devices in daily life typically contain heating wires. These wires, with their relatively high internal resistance, generate heat when energized, thus achieving the heating function. Inside the device, the heating wire is usually coiled into a spring shape or bent along a plane to form a sheet. These structures are designed to improve the uniformity and efficiency of heating. However, heating wires with these structures are often quite long. Furthermore, due to the thermal expansion and contraction properties of the materials used in their construction, the wire expands and lengthens when energized. This increased length can deform the original structure of the heating wire, potentially causing it to detach from its original position and posing a safety hazard. Additionally, during operation, the bending of the heating wire creates opposite currents between adjacent wires. These opposing currents generate repulsive forces between adjacent wires, leading to vibrations and affecting the stability of the heating wire during operation.
[0003] Based on the above, Chinese patent document CN208936199U discloses a heating element assembly device for igniting cigars by closely adhering to a heating element. The specific operation is as follows: it includes a positioning frame, a high-temperature resistant insulating sheet I, a circuit board, a high-temperature resistant insulating sheet II, a high-temperature resistant insulating sheet III, a heating element, a high-temperature resistant insulating sheet IV, a rivet I, a pressure plate, and a rivet II; a high-temperature resistant insulating sheet I is provided between the positioning frame and the circuit board, and high-temperature resistant insulating sheets II and III are provided between the circuit board and the heating element. A high-temperature resistant insulating sheet IV is provided on the outside of the heating element. The rivet I passes through the high-temperature resistant insulating sheet IV, the heating element, the high-temperature resistant insulating sheet III, the high-temperature resistant insulating sheet II, the circuit board, and the high-temperature resistant insulating sheet I in sequence and is riveted to the positioning frame; a pressure plate is connected to the top of the circuit board by the rivet II.
[0004] The aforementioned patent document discloses a heating device based on a heating element. The heating element in this device has a mesh-like shape, and multiple feet are provided on the edge of the heating element to fix it to high-temperature resistant insulating sheets II and III. When the heating element is energized and heated, it expands. Because the edge of the heating element is fixed, the material that makes up the heating element is easily deformed in the middle due to internal compression. Furthermore, because the material softens when the temperature of the heating element rises, the deformed heating element will undergo permanent deformation after cooling. If a certain position of the heating element undergoes multiple deformations, that position is prone to breakage, which will affect the heating effect of the device. Therefore, there is still room for improvement in the structure of fixing the heating element in this device. Utility Model Content
[0005] To address the technical deficiencies in the prior art, this utility model proposes a structurally stable heating element, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:
[0006] A structurally stable heating element includes an upper cover ring, a heating mechanism, and a lower base. The upper cover ring, the heating mechanism, and the lower base are arranged sequentially along the thickness direction. The upper cover ring and the lower base share a common heating hole at their center. The upper surface of the lower base is provided with several pin slots extending outward from the edge of the heating hole. The upper surface of the lower base is provided with conductive grooves on opposite sides.
[0007] The heating mechanism includes the following structure: a conductive end, which has two conductive ends and is located in two conductive grooves respectively; a heating wire, which is located in a heating hole and its two ends are fixedly connected to the two conductive ends respectively; and the heating wire has a number of support pins extending into the pin groove.
[0008] An expansion space is formed between the end of the support pin and the end of the pin groove extension, and the pin groove is filled with a buffer medium that wraps around the support pin.
[0009] As a further technical solution of this utility model, the heating wire extends in a bent manner between the two conductive ends, and the heating wire forms several bent ends near the edge of the heating hole, and the support pin extends from the bent end into the pin groove.
[0010] As a further technical solution of this utility model, the bending ends divide the heating wire into several parallel heating wire segments, and the heating wire segments extend in the same direction as the support pins.
[0011] An expansion gap is formed between the bent end and the edge of the heating hole, and the width of the expansion gap is the same as that of the expansion space.
[0012] As a further technical solution of this utility model, the upper cover ring is provided with wiring pins at positions opposite to the two conductive ends. The wiring pins pass through the conductive ends and the lower base in sequence and extend to the bottom of the lower base. The surface of the wiring pins is provided with threads, and a fixing nut matching the threads is fitted on the surface of the wiring pins.
[0013] As a further technical solution of this utility model, the upper surface of the upper cover ring is covered with a heating pad, and the surface of the heating pad has several fixing holes.
[0014] The beneficial effects of this utility model are as follows:
[0015] This utility model discloses a heating element with a stable structure and that is not easily deformed. The heating element is clamped and fixed by an upper cover ring and a lower base to form a heating mechanism that generates heat when current is applied. The lower base positions the heating wire by engaging with a support pin through a pin slot. When the heating wire expands due to heat, the expansion space allows the support pin to move outward within the pin slot. The heating wire can expand through the expansion gap, preventing it from being obstructed and deformed. Furthermore, the pin slot is filled with a buffer medium that wraps around the support pin. The buffer medium's buffering and lubricating effects prevent the support pin from colliding or rubbing against the upper cover ring or the lower base during the vibration of the heating wire when energized, thus avoiding noise and ensuring that the heating element can operate stably and quietly. Attached Figure Description
[0016] Figure 1 A schematic diagram of the structure of a stable heating element Figure 1 .
[0017] Figure 2 This is a disassembly diagram of a structurally stable heating element. Figure 1 .
[0018] Figure 3 This is a disassembly diagram of a structurally stable heating element. Figure 2 .
[0019] Figure 4 A schematic diagram of the structure of a stable heating element Figure 2 .
[0020] Figure 5 This is a disassembly diagram of a structurally stable heating element. Figure 3 .
[0021] Wherein: 1-Upper cover ring, 2-Heating mechanism, 21-Conductive end, 22-Heating wire, 221-Bent end, 222-Heating wire segment, 23-Support pin, 3-Lower base, 31-Pin slot, 32-Conductive slot, 33-Buffer medium, 34-Through hole, 4-Heating hole, 5-Connection pin, 51-Fixing nut, 6-Heating pad, 61-Fixing hole. Detailed Implementation
[0022] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.
[0023] A structurally stable heating element includes an upper cover ring 1, a heating mechanism 2, and a lower base 3. The upper cover ring 1, the heating mechanism 2, and the lower base 3 are arranged sequentially along the thickness direction. The upper cover ring 1 and the lower base 3 share a common heating hole 4. The upper surface of the lower base 3 is provided with a plurality of pin grooves 31 extending outward from the edge of the heating hole 4. The upper surface of the lower base 3 is provided with conductive grooves 32 on both opposite sides.
[0024] The heating mechanism 2 includes the following structure: a conductive end 21, which has two conductive ends 21 and is located in two conductive grooves 32 respectively; a heating wire 22, which is located in the heating hole 4 and its two ends are fixedly connected to the two conductive ends 21 respectively; and the heating wire 22 has a number of support pins 23 extending into the pin groove 31.
[0025] An expansion space is formed between the end of the support pin 23 and the end of the extended pin groove 31, and the pin groove 31 is filled with a buffer medium 33 that wraps the support pin 23.
[0026] This utility model discloses a heating element with a stable structure and that is not easily deformed, referring to... Figure 1 , Figure 2 , Figure 3 The heating element is mainly composed of an upper cover ring 1, a heating mechanism 2, and a lower base 3. The upper cover ring 1 and the lower base 3 are made of insulating and heat-insulating materials. The upper cover ring 1 and the lower base 3 clamp and fix the heating mechanism 2 in the middle. The upper cover ring 1 and the lower base 3 mainly clamp the conductive end 21 and the support pin 23 of the heating mechanism 2. The upper cover ring 1 and the lower base 3 are both ring-shaped and have a heating hole 4 in the center. After the heating mechanism 2 is clamped and fixed by the upper cover ring 1 and the lower base 3, its heating wire 22 extends in the heating hole 4, so that the heating element mainly generates heat and heats at the position of the heating hole 4.
[0027] The heating mechanism 2 mainly consists of a heating wire 22 and a conductive end 21. The heating wire 22 can be made of a metal material with high resistivity, such as nickel-chromium alloy, iron-chromium-aluminum alloy, or copper-nickel alloy. The heating wire 22 is bent and extended in the heating hole 4 to form a circular thin sheet with a shape close to the heating hole 4. The conductive end 21 is made of a metal material with good conductivity. The two conductive ends 21 are respectively connected to the two poles of the power supply line. When the current generated after power is applied flows through the heating wire 22, the high resistivity of the heating wire 22 makes it heat up efficiently, so that the heating sheet emits heat through the heating wire 22 at the position of the heating hole 4 and heats the object near the heating hole 4.
[0028] When the heating mechanism 2 generates heat, the heating wire 22 will expand to a certain extent due to the thermal expansion and contraction of the material. The expansion of the heating wire 22 will cause the edge of the circular sheet structure formed by the heating wire 22 to expand and extend outward, and push the support pin 23 to move towards the end of the pin groove 31. The expansion space allows the support pin 23 to move outward during the expansion of the heating wire 22, avoiding the resistance of the upper cover ring 1 or the lower base 3 during the expansion of the heating wire 22 and avoiding the deformation of the heating wire 22 during the heating process, thereby ensuring that the heating wire 22 maintains structural stability during the operation of the heating plate.
[0029] Furthermore, due to factors such as the repulsive force generated by the opposite current direction between adjacent heating wires 22, the heating wires 22 vibrate during the heating process. The vibrating heating wires 22 will collide or rub against the upper cover ring 1 or the lower base 3 through the support pins 23, generating noise. Specifically, the heating element has abnormal noise inside during operation. Based on the above defects, the buffer medium 33 is preferably formed by filling the pin groove 31 with thermally conductive silicone grease. The thermally conductive silicone grease has good heat resistance and is not easy to solidify due to high temperature after being filled into the pin groove 31. When the heating wires 22 vibrate, the buffer medium 33 can buffer the vibration of the heating wires 22 at the support pins 23 to reduce the vibration frequency. In addition, the buffer medium 33 also has a lubricating effect to prevent the support pins 23 from colliding or rubbing against the upper cover ring 1 or the lower base 3 and generating noise, so that the heating element can work stably and quietly.
[0030] Furthermore, the surface of the lower base 3 has several through holes 34. The through holes 34 are mainly used to inject adhesive or hot melt adhesive to fix the upper cover ring 1 and the lower base 3. After the upper cover ring 1 and the lower base 3 are bonded and fixed by adhesive or hot melt adhesive, the upper cover ring 1 and the lower base 3 can clamp and fix the heating mechanism 2, improve the structural stability of the heating element, and the upper cover ring 1 and the lower base 3 do not need to be fixed by bolts or nuts. The upper surface of the upper cover ring 1 does not have bolt or nut structure protrusions, making the upper surface of the upper cover ring 1 flatter.
[0031] As one of the preferred embodiments of this utility model, refer to Figure 1 , Figure 2 , Figure 3The heating wire 22 extends in a bent manner between the two conductive ends 21. Several bent ends 221 are formed near the edge of the heating hole 4. Support pins 23 extend from the bent ends 221 into the pin groove 31. When the heating wire 22 adopts a bent extension structure, it can be more evenly distributed in the heating hole 4 and the coverage area of the heating wire 22 in the heating hole 4 can be increased, thereby improving the uniformity of heating the object by the heating plate. The upper cover ring 1 and the lower base 3 clamp and fix the heating wire 22 through several support pins 23, and the position of each support pin 23 is the upper cover ring 1. The lower base 3 serves as the clamping and fixing point for the heating wire 22. Since the support pin 23 is fixedly connected to the bent end 221, one support pin 23 fixes two heating wire segments 222 connected to the bent end 221. This ensures the firmness of the clamping and fixing of the heating wire 22 between the upper cover ring 1 and the lower base 3 through the support pin 23. The firm clamping and fixing of the heating wire 22 also suppresses the vibration phenomenon that occurs after the heating wire 22 is energized, which is conducive to the stable and quiet heating of the heating wire. Under the power transmission conditions of 24V and 3A, the temperature of the stable heating of the above structure can reach about 550℃, which meets the needs of most applications.
[0032] As one of the preferred embodiments of this utility model, refer to Figure 1 , Figure 2 , Figure 3 Several bent ends 221 divide the heating wire 22 into several parallel heating wire segments 222. The heating wire segments 222 extend in the same direction as the support pins 23. An expansion gap is formed between the bent ends 221 and the edge of the heating hole 4. The width of the expansion gap is the same as that of the expansion space.
[0033] When the heating wire 22 heats up and expands, it usually expands along its own extension direction. At this time, the heating wire segment 222 will push the support pin 23 to move toward the end of the pin slot 31, so that the expansion direction of the heating wire 22 matches the movement direction of the support pin 23. This ensures that the heating wire 22 can expand normally after heating without deformation. The expansion gap can prevent the edge of the heating wire 22 from contacting the upper cover ring 1 or the lower base 3 during the expansion process, which would cause the heating wire 22 to be squeezed and deformed. This ensures that the heating element keeps the heating wire 22 structurally stable during operation.
[0034] As one of the preferred embodiments of this utility model, refer to Figure 1 , Figure 2 , Figure 3The upper cover ring 1 is provided with wiring pins 5 at the positions opposite to the two conductive ends 21. The wiring pins 5 pass through the conductive ends 21 and the lower base 3 in sequence and extend to the bottom of the lower base 3. The surface of the wiring pins 5 is provided with threads, and a fixing nut 51 matching the threads is fitted on the surface of the wiring pins 5. The wiring pins 5 fix the conductive ends 21 inside the conductive groove 32 through the fixing nut 51. The wiring pins 5 are made of conductive metal material. The wiring pins 5 can fix the current-carrying wires at the positions of the two conductive ends 21 at the same time, so that the current can be stably delivered to the heating mechanism 2 through the wires and make it heat up.
[0035] As one of the preferred embodiments of this utility model, refer to Figure 4 , Figure 5 The upper surface of the upper cover ring 1 is covered with a heating pad 6, and the surface of the heating pad 6 has several fixing holes 61. The heating pad of this utility model is mainly used for installation in common heating furnaces and other equipment. The heating pad 6 is fixed in the heating furnace by means of fixing holes 61 and bolts and other tools. The heating pad 6 can support the items that need to be heated. The heating pad 6 is made of quartz glass with good electrical insulation properties. The heating pad 6 can isolate the heating mechanism 2 and prevent it from contacting other parts and causing a short circuit.
[0036] In summary, this utility model provides a heating element with a stable structure that is not easily deformed. The heating element is clamped and fixed by the upper cover ring 1 and the lower base 3 to the heating mechanism 2 that heats up after current is applied. The lower base 3 positions the heating wire 22 through the lead groove 31 and the support lead 23. When the heating wire 22 heats up and expands, the expansion space allows the support lead 23 to move outward within the lead groove 31. The heating wire 22 can expand through the expansion gap, avoiding deformation due to obstruction. Furthermore, the lead groove 31 is filled with a buffer medium 33 that wraps around the support lead 23. The buffering and lubricating effects of the buffer medium 33 prevent the support lead 23 from colliding or rubbing with the upper cover ring 1 or the lower base 3 during the vibration of the heating wire 22 when energized, thus preventing noise. This ensures that the heating element can work stably and quietly. From the implementation results, this utility model product, based on its structural characteristics, is safe, reliable, and durable, and can be used in a 24V, 3A DC power supply environment, under which it can continuously and stably output a heating temperature of 550℃.
[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A structure-stable heating sheet comprising an upper cover ring (1), a heating mechanism (2), and a lower base (3), characterized in that, The upper cover ring (1), heating mechanism (2), and lower base (3) are arranged sequentially along the thickness direction. The upper cover ring (1) and the lower base (3) share a common heating hole (4). The upper surface of the lower base (3) is provided with several pin grooves (31) extending outward from the edge of the heating hole (4). The upper surface of the lower base (3) is provided with conductive grooves (32) on both opposite sides. The heating mechanism (2) includes the following structure: a conductive end (21), which has two conductive ends (21) and is located in two conductive grooves (32) respectively; a heating wire (22), which is located in the heating hole (4) and its two ends are fixedly connected to the two conductive ends (21) respectively; and the heating wire (22) has a number of support pins (23) extending into the pin groove (31). An expansion space is formed between the end of the support pin (23) and the end of the extended pin groove (31), and the pin groove (31) is filled with a buffer medium (33) that wraps the support pin (23).
2. The structurally stable heating element according to claim 1, characterized in that, The heating wire (22) extends in a bent manner between two conductive ends (21), and the heating wire (22) forms several bent ends (221) near the edge of the heating hole (4). The support pin (23) extends from the bent ends (221) into the pin groove (31).
3. The structurally stable heating element according to claim 2, characterized in that, Several of the bent ends (221) divide the heating wire (22) into several parallel heating wire segments (222), the heating wire segments (222) extending in the same direction as the support pin (23); An expansion gap is formed between the curved end (221) and the edge of the heating hole (4), and the expansion gap has the same width as the expansion space.
4. The structurally stable heating element according to claim 1, characterized in that, The upper cover ring (1) is provided with wiring pins (5) at the positions opposite to the two conductive ends (21). The wiring pins (5) pass through the conductive ends (21) and the lower base (3) in sequence and extend to the bottom of the lower base (3). The surface of the wiring pins (5) is provided with threads, and the surface of the wiring pins (5) is fitted with a fixing nut (51) that matches the threads.
5. The structurally stable heating element according to claim 1, characterized in that, The upper surface of the upper cover ring (1) is covered with a heating pad (6), and the surface of the heating pad (6) has several fixing holes (61).