PTC heater with heating core protection

Abstract

The invention discloses a PTC heater with a heating core protection function, and relates to the technical field of PTC heaters, the PTC heater comprises a mounting assembly, the two ends of the mounting assembly are fixedly connected with a front mounting plate and a rear mounting plate respectively, the mounting assembly is composed of isolation plates distributed at equal intervals, and a heating structure is mounted between every two isolation plates. According to the PTC heater with the heating core protection function, the pressure protection shell wrapping the heating core provides a mechanical protection function, external vibration and impact force can be effectively resisted, the heating core is prevented from being directly damaged, the heat conduction fluid further has the function of absorbing the mechanical impact force, when the device is vibrated or impacted, a liquid medium can buffer part of mechanical stress, and the service life of the device is prolonged. The springs are installed at the top and the bottom of the heating structure respectively, vibration force input by the outside is absorbed through elastic deformation, the heating core does not make direct contact with the isolation plate when displacement is generated due to vibration, and abrasion and fatigue damage are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of PTC heaters, in particular to a PTC heater with heating core protection. Background Art

[0002] PTC heater is a heating device made of PTC material. When the PTC material reaches a certain temperature, the resistance will increase significantly, thereby automatically limiting the current to prevent overheating. The existing PTC material has poor material strength and is easily damaged by external forces.

[0003] In order to overcome the above-mentioned defects, a Chinese patent of the prior art (publication number: CN219421060U) discloses a heating core structure of a PTC heater, which includes a base connecting unit, and a heating core device is fixedly installed on both sides of the upper end and the left and right sides of the base connecting unit, and a heat dissipation fin device is fixedly installed on both ends of the left and right sides of the heating core device. This device solves the problem that the thermal conductivity of the current PTC heater is not ideal. By providing a heat dissipation fin device, the heat generated after heating can be dissipated to protect the component. A part of the heat can be dissipated through the provided heat conduction block, heat dissipation plate, heat conduction groove and heat conduction pipe, and further heat is dissipated through the heat dissipation fins, heat conduction holes and heat dissipation holes, thereby accelerating the heat dissipation efficiency and achieving an ideal heat conduction effect. When the component is overheated, overheat protection can be provided to better protect the component, and the reliability is ideal. By providing a heating core device, the provided silicone coating can make the heat conduction element fully contact with the heat dissipation element, thereby improving the thermal conductivity efficiency. Rate; there is also a Chinese patent of the prior art (publication number: CN221340123U) which discloses a mounting structure of an automotive PTC heater, comprising a plurality of heating cores having a ceramic insulation layer and wrapped with an insulation film and connected in series in an aluminum tube, and a plurality of heating core assemblies consisting of heat dissipation strips arranged on the surface of each heating core, wherein insulating caps are respectively arranged at the electrode lead-out ends of the heating cores, and further comprising a front mounting sleeve and a rear packaging sleeve, wherein the front and rear ends of each heating core assembly are respectively installed with a front mounting sleeve and a rear packaging sleeve, and each electrode lead-out end is led out through a corresponding insulating cap and connected to a PCB board in a controller housing, thereby achieving the purpose of double insulation protection and improving safety, and at the same time, not only can reliable positioning of the heating core assembly be provided during installation, but also safety protection can be further improved and water leakage problems can be avoided, in addition, the installation is very quick and convenient and the installation reliability is high, so that it can be used for a long time, thereby achieving the purpose of reliable use and avoiding water leakage.

[0004] Although the existing technology can overcome the above-mentioned deficiencies, there are still other problems in its operation: the heating core of the PTC heater dissipates its heat through direct contact during operation, and when the heating core is in direct contact with the heat dissipation device, the heat dissipation device will be directly acted on the heating core when subjected to external force, which can easily cause damage to the heating core. Summary of the invention

[0005] The purpose of the present invention is to provide a PTC heater with heating core protection to solve the problem that the heating core of the PTC heater in the above-mentioned background technology dissipates its heat through direct contact during operation, and when the heating core and the heat dissipation device are in direct contact, the heat dissipation device will be directly acted on the heating core when subjected to external force, which may easily cause damage to the heating core.

[0006] To achieve the above object, the present invention provides the following technical solution: a PTC heater with heating core protection comprises a mounting assembly, wherein two ends of the mounting assembly are respectively fixedly connected with a front mounting plate and a rear mounting plate;

[0007] The mounting assembly is composed of equidistantly distributed isolation plates, and a heating structure is installed between every two isolation plates, and a shock-absorbing structure for shock-absorbing the heating structure is installed at the connection between the heating structure and the isolation plate, and the shock-absorbing structure includes a fixing seat installed on the inner side of the top of the isolation plate, and a spring is fixedly connected to one side of each fixing seat facing the heating structure;

[0008] A protective structure for protecting cables is installed inside the front mounting plate.

[0009] Preferably, both ends of the isolation plate are respectively connected to the rear mounting plate and the front mounting plate, and the equidistantly distributed isolation plates are connected to each other through the rear mounting plate and the front mounting plate to form a whole.

[0010] Preferably, the heating structure includes a fixed frame installed between two isolation plates, and both sides of the fixed frame are slidably connected to the isolation plates, and two symmetrically distributed cooling fins are fixedly connected inside the fixed frame. The cooling fins are made of metal, and the cooling fins are a continuously distributed wavy structure, and a fixed plate is fixedly connected between the two cooling fins.

[0011] Preferably, the fixed frame is provided with equidistantly distributed mounting grooves on both sides close to the heat dissipation fins, and the fixed frame is fixedly connected with equidistantly distributed movable seats on the upper and lower sides, the interior of the mounting groove and the end of the heat dissipation fin away from the fixed plate are engaged with each other, the movable seat and the fixed seat are aligned with each other, and a spring is installed between the movable seat and the fixed seat.

[0012] Preferably, a pressure protection shell is fixedly connected to the interior of the fixed plate and the interior of the heat dissipation fins, and the interior of the pressure protection shell is a hollow structure. A heating core is installed inside the pressure protection shell, and a heat-conducting fluid is filled between the pressure protection shell and the heating core. A sealing block is fixedly connected to one end of the heating core, and the sealing block is installed at the end of the pressure protection shell.

[0013] Preferably, a wire is fixedly connected to a side of the sealing block away from the pressure protection shell, and the wire runs through the interior of the sealing block and is electrically connected to the heating core, and the sealing block supplies power to the heating core.

[0014] Preferably, the protective structure includes a wire installed on a side of the front mounting plate away from the mounting assembly, and the front mounting plate is provided with equidistantly distributed openings, the openings are provided with wires, and the wires extend through the openings through the front mounting plate to the inside of the wires.

[0015] Preferably, the front mounting plate is fixedly connected to the inside with equally spaced protective tubes, and each protective tube is fixedly connected to the inside of the opening in the front mounting plate. The protective tube is configured as a bellows structure, and one end of the protective tube away from the front mounting plate is interconnected with the sealing block.

[0016] Preferably, a junction box is fixedly connected to one end of the protective cover, and the ends of the wires away from the sealing block are interconnected with the junction box, a plug hole is provided at one end of the protective cover close to the junction box, and the input end of the junction box is located inside the plug hole, and a sliding hole is provided inside the protective cover that is vertically distributed with the plug hole.

[0017] Preferably, an adjustment block is slidably connected inside the sliding hole, and a clamp is fixedly connected to one end of the adjustment block close to the inside of the plug-in hole, and the clamp is located inside the plug-in hole, a self-tightening screw is threadedly connected inside the adjustment block, and the self-tightening screw is rotatably connected to the outside of the protective cover, a power supply cable is snap-connected inside the plug-in hole, and the end of the power supply cable and the input end of the junction box are connected to each other.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The PTC heater with heating core protection has a pressure protection shell that wraps the heating core and provides mechanical protection function, which can effectively resist external vibration and impact force and prevent the heating core from being directly damaged. The heat-conducting fluid also has the function of absorbing mechanical impact force. When the device is vibrated or impacted, the liquid medium can buffer part of the mechanical stress, thereby protecting the core components of the heating core. Springs are respectively installed on the top and bottom of the heating structure to absorb external vibration force through elastic deformation, so that the heating core does not directly contact the isolation plate when it is displaced due to vibration, thereby reducing wear and fatigue damage.

[0020] By setting wavy cooling fins on the surface of the pressure protection shell, the area of ​​the device in contact with the outside air is significantly increased. Compared with ordinary flat radiators, the wavy design improves the heat dissipation efficiency per unit volume and enhances the convection effect, so that the device can quickly release the generated heat to the surrounding environment. The high-speed heat transfer performance of the heat transfer fluid: the heat inside the heating core is quickly and evenly dispersed to the surface of the pressure protection shell through the heat transfer fluid, avoiding local overheating problems and ensuring uniform temperature distribution of the entire device.

[0021] The power supply cable protection tube avoids wear or short circuit caused by friction or vibration of the cable, improves the safety of circuit connection, and the self-tightening screw fixes the power supply cable. Even under strong vibration, the circuit connection can remain stable and will not loosen. This design further enhances the impact resistance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the mounting plate of the present invention;

[0025] Figure 4 This is a schematic diagram of the exploded structure of the mounting plate of the present invention;

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the fixed frame of the present invention;

[0027] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the protective shell of the present invention;

[0029] Figure 8 This is a schematic diagram of the exploded structure of the front mounting plate of the present invention;

[0030] Fig. 9 It is a schematic diagram of the cross-sectional structure of the protective cover of the present invention;

[0031] Fig.10 This is a schematic diagram of the structure of the adjustment block of the present invention.

[0032] In the figure: 1. Installation assembly; 2. Rear installation plate; 3. Front installation plate; 4. Isolation plate; 5. Fixed frame; 6. Heat sink fins; 7. Fixed plate; 8. Pressure protection shell; 9. Fixed seat; 10. Spring; 11. Installation slot; 12. Movable seat; 13. Heater core; 14. Sealing block; 15. Wire; 16. Protective cover; 17. Protective tube; 18. Junction box; 19. Plug hole; 20. Sliding hole; 21. Adjustment block; 22. Clamp; 23. Self-tightening screw; 24. Power supply cable. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1 - Fig.10 The present invention provides the following technical solution: a PTC heater with heating core protection comprises a mounting assembly 1, wherein two ends of the mounting assembly 1 are respectively fixedly connected with a front mounting plate 3 and a rear mounting plate 2; the mounting assembly 1 is composed of equidistantly distributed isolation plates 4, and a heating structure is installed between every two isolation plates 4, and a shock-absorbing structure for shock-absorbing the heating structure is installed at the connection between the heating structure and the isolation plates 4, and the shock-absorbing structure comprises a fixing seat 9 installed on the inner side of the top of the isolation plates 4, and each fixing seat 9 is fixedly connected with a spring 10 on one side facing the heating structure; a protective structure for protecting cables is installed inside the front mounting plate 3; two ends of the isolation plate 4 are respectively interconnected with the rear mounting plate 2 and the front mounting plate 3, and the equidistantly distributed isolation plates 4 are interconnected with the rear mounting plate 2 and the front mounting plate 3 to form a whole.

[0035] The end of the power supply cable 24 is connected to the input end of the junction box 18, and the external power supply is transmitted to the junction box 18 via the power supply cable 24. Then the junction box distributes the electric energy to multiple wires 15, and simultaneously supplies power to multiple heating cores 13 inside the device. During the power-on process, the heating core 13 begins to generate heat, and its main structure is wrapped by the pressure protection shell 8, and the pressure protection shell and the heating core are filled with a heat-conducting fluid. The heat-conducting fluid plays a role in efficiently transferring heat, and the heat released in the heating core is quickly transferred to the surface of the pressure protection shell 8, thereby realizing the heating function of the equipment.

[0036] In order to prevent damage to the heating structure caused by vibration, the heating structure is fixed between the isolation plates 4 and is configured with a shock-absorbing structure. The shock-absorbing structure includes a fixing seat 9 installed on the inner side of the top of the isolation plate and a spring 10. When the heating structure is vibrated, it will move up and down inside the isolation plate 4. At this time, the top and bottom of the heating structure will drive the spring 10 to deform, so that the spring absorbs the vibration force and buffers the external impact force, reducing damage to the heating core and its surrounding components. In addition, the uniform distribution between the isolation plates not only ensures the mechanical seismic resistance, but also keeps the heating structure stably in the center of the entire device, achieving safer and more reliable operation.

[0037] Embodiment 2: Based on embodiment 1, a heating structure is also disclosed, and its specific structure is as follows: the heating structure includes a fixed frame 5 installed between two isolation plates 4, and both sides of the fixed frame 5 are slidably connected to the isolation plates 4, and two symmetrically distributed heat dissipation fins 6 are fixedly connected inside the fixed frame 5, the heat dissipation fins 6 are made of metal, and the heat dissipation fins 6 are a continuously distributed wavy structure, and a fixed plate 7 is fixedly connected between the two heat dissipation fins 6; both sides of the fixed frame 5 are provided with equidistantly distributed mounting grooves 11 on one side close to the heat dissipation fins 6, and the upper and lower sides of the fixed frame 5 are fixedly connected with equidistantly distributed movable seats 12, and the inside of the mounting groove 11 and the heat dissipation fins 6 away from the fixed plate 7 One end is connected with each other by being snap-fitted, and the movable seat 12 and the fixed seat 9 are aligned with each other, and the spring 10 is installed between the movable seat 12 and the fixed seat 9; the inside of the fixed plate 7 and the inside of the heat dissipation fin 6 are fixedly connected with the pressure protection shell 8, and the inside of the pressure protection shell 8 is a hollow structure, a heating core 13 is installed inside the pressure protection shell 8, and the space between the pressure protection shell 8 and the heating core 13 is filled with a heat-conducting fluid, one end of the heating core 13 is fixedly connected with a sealing block 14, and the sealing block 14 is installed at the end of the pressure protection shell 8; the side of the sealing block 14 away from the pressure protection shell 8 is fixedly connected with a wire 15, and the wire 15 passes through the inside of the sealing block 14 and is electrically connected to the heating core 13, and the sealing block 14 supplies power to the heating core 13.

[0038] The fixed frame 5 is located between the two isolation plates 4 in a sliding connection manner, and two symmetrically distributed, metal wave-shaped heat dissipation fins 6 are fixedly connected inside it. These heat dissipation fins greatly increase the heat dissipation area through their wave-like continuously distributed structure, thereby improving the heat dissipation efficiency.

[0039] During operation, as the wire 15 supplies power to the heating core 13, the heating core generates heat, and the heat is first transferred to the heat-conducting fluid inside the pressure protection shell 8, and then transferred to the surface of the pressure protection shell by the heat-conducting fluid, and finally conducted to the heat dissipation fins 6 through the pressure protection shell. Due to the multiple wave-shaped design of the heat dissipation fins, the contact area with the air is significantly increased, which can quickly diffuse the heat to the outside air, ensuring efficient heat dissipation of the equipment.

[0040] In addition, the heat-conducting fluid not only serves as a heat conduction medium, but also plays a role in absorbing impact force. When the device is subjected to excessive impact, the heat-conducting fluid can effectively alleviate the impact from the outside world, so that even if the pressure protection shell 8 is slightly deformed, it will not cause direct damage to the internal heating core 13. This design enhances the impact resistance of the equipment and improves the safety and durability of the heating core.

[0041] In addition, the spring 10 continues to play a shock-absorbing function, cooperating with the movable seat 12 connected to both ends of the fixed frame 5 to absorb the mechanical energy during vibration, further alleviate the impact of external vibration, and at the same time reduce the fatigue of the heating structure under pressure, thereby extending the life of the entire equipment.

[0042] PTC materials generate heat when electricity is applied, and after the temperature of the PTC material reaches a certain value, the resistance of the PTC material will increase rapidly, thereby automatically reducing the current, controlling the temperature, and avoiding overheating. Therefore, due to the self-limiting temperature and overheating protection functions, it is difficult for the PTC material to burn out or overheat even without additional protection measures. Because there is no mechanical fatigue in the traditional resistance wire heating method, the service life is longer, and the upper temperature limit of the PTC material is mainly determined by its own different chemical element composition.

[0043] The main materials are as follows: barium titanate-based ceramic PTC materials, operating temperature range: 60°C-250°C; high temperature modified ceramic PTC materials, operating temperature range: 200°C-300°C; polymer PTC materials, operating temperature range: -40°C to 125°C; metal-based PTC materials, operating temperature range: room temperature to 500°C or higher. The heat transfer fluid filled between the heating core 13 and the pressure protection shell 8 is filled according to its different temperature ranges. The PTC materials working in different temperature ranges need to be selected appropriately. The heat transfer fluid can efficiently transfer heat and ensure system stability: silicone oil, mineral oil or perfluoropolyether can be used in the low temperature range below 125℃; heat transfer oil and silicone-based heat transfer fluid can be used in the medium temperature range of 60℃-250℃; molten salt, high temperature organic heat transfer fluid or high temperature silicone oil are suitable for the high temperature range of 200℃-300℃; and in extremely high temperature environments above 300℃, liquid metal, inert gas or molten salt mixture must be selected. The selection is optimized based on the operating temperature requirements of the PTC material and the temperature range, chemical stability and cost of the heat transfer fluid.

[0044] Embodiment 3: Based on Embodiment 1 and Embodiment 2, a protective structure is further disclosed, and its specific structure is as follows: the protective structure includes a wire 15 installed on the side of the front mounting plate 3 away from the mounting assembly 1, and the front mounting plate 3 is provided with equidistantly distributed openings inside, the openings are provided with wires 15, and the wires 15 pass through the front mounting plate 3 through the openings and extend to the inside of the wires 15; the front mounting plate 3 is fixedly connected with equidistantly distributed protective tubes 17, and each protective tube 17 is fixedly connected to the inside of the opening in the front mounting plate 3, the protective tube 17 is configured as a corrugated tube structure, and the end of the protective tube 17 away from the front mounting plate 3 is interconnected with the sealing block 14; the protective cover 16 is fixedly connected with a junction box 18 at one end inside, and the wires 15 The ends away from the sealing block 14 are interconnected with the junction box 18, and a plug hole 19 is provided at the end of the protective cover 16 close to the junction box 18, and the input end of the junction box 18 is located inside the plug hole 19, and a sliding hole 20 is provided inside the protective cover 16 and is vertically distributed with the plug hole 19; an adjustment block 21 is slidably connected inside the sliding hole 20, and a clamping plate 22 is fixedly connected to one end of the adjustment block 21 close to the inside of the plug hole 19, and the clamping plate 22 is located inside the plug hole 19, a self-tightening screw 23 is threadedly connected inside the adjustment block 21, and the self-tightening screw 23 is rotatably connected to the outside of the protective cover 16, a power supply cable 24 is snap-connected inside the plug hole 19, and the end of the power supply cable 24 and the input end of the junction box 18 are interconnected.

[0045] The power supply cable 24 enters the front mounting plate 3 from the outside of the device, passes through the equally spaced openings, and extends to the inside of the junction box 18. To prevent the power supply cable from being worn due to vibration or friction, a protective tube 17 in the form of a corrugated tube is provided on the outside. One end of the protective tube 17 is fixed inside the opening of the front mounting plate 3, and the other end is connected to the sealing block 14, thereby protecting the wires 15 and the power supply cable 24.

[0046] The far end of the power supply cable 24 is connected to the input end of the junction box 18, and the junction box is fixedly connected to the power supply cable through the plug hole 19. The entire connection is located inside the protective cover 16, which provides additional protection to avoid external interference to the junction box.

[0047] The self-tightening screw 23 is threadedly connected to the adjustment block 21. When the self-tightening screw is rotated, the adjustment block moves along the sliding hole 20, pushing the clamping plate 22 to contact the power supply cable and firmly fix it in the plug hole 19, which not only prevents the power supply cable from loosening, but also can quickly adjust the connection strength, which is convenient for maintenance operations.

[0048] During the operation of the device, when the fixed frame 5 vibrates up and down due to external vibrations, the wire 15 moves accordingly. However, since the outside of the wire is covered with a protective tube 17, friction with other parts can be effectively avoided, thereby reducing the risk of wear. At the same time, when the power supply cable 24 is subjected to external force, the synergistic effect of the splint and the socket can ensure its firm connection, and the contact with the junction box 18 will not loosen due to vibration, thereby ensuring the reliability of power supply and the overall operational stability of the device.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A PTC heater with heating core protection, comprising a mounting assembly (1), wherein two ends of the mounting assembly (1) are respectively fixedly connected to a front mounting plate (3) and a rear mounting plate (2); Features: The mounting assembly (1) is composed of equidistantly distributed isolation plates (4), a heating structure is installed between every two isolation plates (4), and a shock absorbing structure for shock absorbing the heating structure is installed at the connection between the heating structure and the isolation plate (4), the shock absorbing structure comprising a fixing seat (9) installed on the inner side of the top of the isolation plate (4), and a spring (10) is fixedly connected to the side of each fixing seat (9) facing the heating structure; A protective structure for protecting cables is installed inside the front installation plate (3).

2. The PTC heater with heating core protection according to claim 1, characterized in that: The two ends of the isolation plate (4) are respectively connected to the rear mounting plate (2) and the front mounting plate (3), and the equidistantly distributed isolation plates (4) are connected to each other through the rear mounting plate (2) and the front mounting plate (3) to form a whole.

3. The PTC heater with heating core protection according to claim 1, characterized in that: The heating structure comprises a fixed frame (5) installed between two isolation plates (4), and both sides of the fixed frame (5) are slidably connected to the isolation plates (4), and two symmetrically distributed heat dissipation fins (6) are fixedly connected inside the fixed frame (5), the heat dissipation fins (6) are made of metal material, and the heat dissipation fins (6) are continuously distributed wavy structures, and a fixed plate (7) is fixedly connected between the two heat dissipation fins (6).

4. The PTC heater with heating core protection according to claim 3, characterized in that: The fixed frame (5) is provided with equidistantly distributed mounting grooves (11) on both sides close to the heat dissipation fins (6), and the fixed frame (5) is fixedly connected with equidistantly distributed movable seats (12) on both upper and lower sides, the interior of the mounting groove (11) and the end of the heat dissipation fin (6) away from the fixed plate (7) are mutually engaged, and the movable seat (12) and the fixed seat (9) are aligned with each other, and the spring (10) is installed between the movable seat (12) and the fixed seat (9).

5. The PTC heater with heating core protection according to claim 4, characterized in that: The interior of the fixing plate (7) and the interior of the heat dissipation fins (6) are both fixedly connected with a pressure protection shell (8), and the interior of the pressure protection shell (8) is a hollow structure. A heating core (13) is installed inside the pressure protection shell (8), and a heat transfer fluid is filled between the pressure protection shell (8) and the heating core (13). A sealing block (14) is fixedly connected to one end of the heating core (13), and the sealing block (14) is installed at the end of the pressure protection shell (8).

6. The PTC heater with heating core protection according to claim 5, characterized in that: A wire (15) is fixedly connected to the side of the sealing block (14) away from the pressure protection shell (8), and the wire (15) passes through the interior of the sealing block (14) and is electrically connected to the heating core (13), and the sealing block (14) supplies power to the heating core (13).

7. The PTC heater with heating core protection according to claim 1, characterized in that: The protective structure comprises a wire (15) installed on a side of a front mounting plate (3) away from the mounting assembly (1), and openings are arranged equidistantly inside the front mounting plate (3), the wires (15) are arranged inside the openings, and the wires (15) pass through the front mounting plate (3) through the openings and extend into the wires (15).

8. The PTC heater with heating core protection according to claim 7, characterized in that: The front mounting plate (3) is internally fixedly connected with equidistantly distributed protective tubes (17), and each protective tube (17) is fixedly connected to the interior of an internal opening of the front mounting plate (3). The protective tube (17) is configured as a bellows structure, and one end of the protective tube (17) away from the front mounting plate (3) is interconnected with the sealing block (14).

9. The PTC heater with heating core protection according to claim 8, characterized in that: A junction box (18) is fixedly connected to one end of the protective cover (16), and the ends of the wires (15) away from the sealing block (14) are connected to the junction box (18). A plug hole (19) is provided at one end of the protective cover (16) close to the junction box (18), and the input end of the junction box (18) is located inside the plug hole (19). A sliding hole (20) is provided inside the protective cover (16) and is vertically distributed with the plug hole (19).

10. The PTC heater with heating core protection according to claim 9, characterized in that: An adjusting block (21) is slidably connected inside the sliding hole (20), and a clamping plate (22) is fixedly connected to one end of the adjusting block (21) close to the inside of the plug hole (19), and the clamping plate (22) is located inside the plug hole (19). A self-tightening screw (23) is threadedly connected inside the adjusting block (21), and the self-tightening screw (23) is rotatably connected to the outside of the protective cover (16). A power supply cable (24) is snap-connected inside the plug hole (19), and the end of the power supply cable (24) and the input end of the junction box (18) are connected to each other.

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