Positive temperature coefficient (PTC) heater curing device

Abstract

The utility model is suitable for the technical field of PTC heaters, and provides a PTC heater curing device which comprises a rack, a closed curing box is arranged above the rack, and the two ends of the curing box are communicated to form a curing cavity for a carrier to pass through; a set of lifting plates are slidably distributed in the curing box in the vertical direction at intervals. The curing cavity is divided into a preheating area, a heating curing area and a cooling area which are independently sealed by the two lifting plates; according to the device, electric push rods on the two sides of a bearing frame are matched with pressure sensors to stably clamp a PTC heater in the carrier clamping link, the interior of a curing cavity is designed in a partitioned mode, temperature and humidity of all the areas are independently controlled, the temperature of the PTC heater is evenly increased in a preheating area through an infrared radiation heater and a double-channel temperature sensing module, high-power rapid curing is conducted in a heating curing area, and the curing efficiency is improved. And the nitrogen protection and waste gas treatment system is used for isolating oxygen and purifying waste gas, so that the curing quality and stability of the PTC heater are comprehensively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of PTC heater technology, and in particular relates to a PTC heater curing device. Background Technology

[0002] In the production process of PTC heaters, a key step is to bond the PTC ceramic heating element to the aluminum tube with adhesive, and then place it in an oven for drying and curing; however, this curing process faces many challenges.

[0003] First, during the curing process of PTC heaters, problems often arise when the carrier moves due to the use of simple fixing devices. These devices are difficult to securely fix the PTC heater, which can easily cause it to shift or tip over during movement. This instability leads to uneven heating, which seriously affects the curing quality and may cause the PTC heater to have unstable performance or a shortened service life.

[0004] Secondly, existing curing equipment lacks effective protection measures in high-temperature environments. During the high-temperature curing process, the PTC heater material is prone to oxidation reaction with oxygen, which not only affects its performance but may also produce harmful gases. These harmful gases not only pollute the environment but may also pose a threat to the health of operators.

[0005] In addition, existing curing devices have relatively simple functions, mainly limited to direct high-temperature curing. This single curing method often fails to achieve the desired curing effect, and the PTC heater after curing requires a long time to cool down to room temperature, thus reducing processing efficiency. The lack of rapid cooling function makes the entire production process lengthy and inefficient, which is not conducive to improving production efficiency and reducing costs. Utility Model Content

[0006] This invention provides a PTC heater curing device, which aims to solve the problems of unstable fixation, high-temperature oxidation, harmful gas emission, and low processing efficiency of existing PTC heater curing devices.

[0007] This utility model is implemented as follows: a PTC heater curing device includes a frame with a sealed curing box above it, and the two ends of the curing box are connected to form a curing cavity for the passage of a carrier.

[0008] A set of lifting plates are arranged at intervals along the vertical direction inside the curing chamber;

[0009] Two lifting plates divide the curing chamber into an independent, sealed preheating zone, a heating and curing zone, and a cooling zone;

[0010] A feed block is provided on the frame along its axial direction, and the feed block is in sliding fit with the frame.

[0011] The feed block is equipped with an L-shaped support frame, which is formed by a right-angle support surface by a first vertical plate and a second horizontal plate connected vertically.

[0012] A set of electric push rods is symmetrically distributed on both sides of the support frame;

[0013] Each electric push rod piston rod end is connected to a limiting plate, and the support frame and the limiting plates on both sides dynamically enclose to form a semi-enclosed curing carrier.

[0014] The inner surface of the vehicle is equipped with a composite ceramic fiber heat insulation layer.

[0015] Preferably, the top of the sealed curing chamber is equipped with a nitrogen input pipe, the end of which is connected to a swirl gas distributor, and the bottom is equipped with a waste gas discharge channel, which is connected to a filter box. Inside the filter box, a primary metal filter, a molecular sieve adsorption layer, and an activated carbon fiber layer are distributed in sequence according to the airflow direction.

[0016] Preferably, the preheating zone and the heating and curing zone are each equipped with multiple sets of infrared radiation heaters. The infrared radiation heaters are embedded in the side wall of the curing chamber in a honeycomb matrix arrangement. Each set of infrared radiation heaters is equipped with a dual-channel temperature sensing module, which includes an infrared thermal imaging sensor and a K-type armored thermocouple.

[0017] Preferably, a variable frequency centrifugal fan is provided at the top of the cooling zone, and an infrared thermal imager is provided on the inner side of the curing chamber adjacent to the variable frequency centrifugal fan.

[0018] Preferably, the curing chamber has sealing doors that slide vertically at both ends of the opening, and two sets of hydraulic cylinders are provided on the top side of the curing chamber. The output end of one set of hydraulic cylinders is connected to the two sealing doors, and the output end of the other set of hydraulic cylinders is connected to the two lifting plates.

[0019] Preferably, a transparent viewing window is provided on the side wall of the curing chamber, and an embedded sealing strip is provided around the viewing window.

[0020] Preferably, a pressure sensor is embedded on the inner side of the bearing surface of the limiting plate.

[0021] Preferably, a ball screw is installed in the frame via bearings, and a servo motor is provided at the end of the frame. The output end of the servo motor is fixedly connected to the ball screw via a flexible coupling, and the ball screw is threadedly engaged with the feed block.

[0022] Compared with the prior art, the embodiments of this application have the following main advantages:

[0023] Firstly, this device comprehensively ensures the curing quality and stability of the PTC heater from carrier clamping and transportation to each curing stage; the electric push rods on both sides of the support frame, in conjunction with pressure sensors, firmly clamp the PTC heater and ensure its stability throughout the entire curing process; the curing chamber is designed with partitions, with independent temperature and humidity control in each area; the infrared radiation heater in the preheating zone, in conjunction with a dual-channel temperature sensing module, ensures uniform heating of the PTC heater; the heating and curing zone uses high power for rapid curing; at the same time, the nitrogen protection and exhaust gas treatment system effectively isolates oxygen and purifies exhaust gas, avoiding material oxidation and harmful gas hazards. Multiple safeguards work together to ensure the stable and reliable curing quality of the PTC heater.

[0024] Secondly, the composite ceramic fiber insulation layer on the inner surface of the carrier of this device effectively reduces heat loss, improves curing efficiency and reduces energy consumption. The automated transmission system reduces manual operation and speeds up the production pace. The curing chamber is divided into zones and has an independent temperature control mechanism to avoid overheating or cooling and to precisely control the curing conditions at each stage, further improving efficiency. In addition, the sealing door and the lifting plate hydraulic cylinder work together to form an independent sealed curing environment, reducing heat exchange and lowering energy consumption. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 3 This is a front sectional view of the structure of this utility model;

[0028] Figure 4 This is a top view structural diagram of this utility model;

[0029] Figure 5 This is a side view of the structure of this utility model;

[0030] Figure 6 This is a cross-sectional structural diagram of the filter box of this utility model;

[0031] In the diagram: 1. Frame; 2. Curing chamber; 3. Lifting plate; 4. Preheating zone; 5. Heating and curing zone; 6. Cooling zone; 7. Feed block; 8. Support frame; 9. First vertical plate; 10. Second horizontal plate; 11. Electric push rod; 12. Limiting plate; 13. Composite ceramic fiber insulation layer; 14. Nitrogen input pipe; 15. Swirl gas distributor; 16. Exhaust gas discharge channel; 17. Filter box; 18. Primary metal filter; 19. Molecular sieve adsorption layer; 20. Activated carbon fiber layer; 21. Infrared radiation heater; 22. Dual-channel temperature sensing module; 23. Infrared thermal imaging sensor; 24. K-type armored thermocouple; 25. Variable frequency centrifugal fan; 26. Infrared thermal imager; 27. Sealing door; 28. Hydraulic cylinder; 29. ​​Viewing window; 30. Sealing strip; 31. Pressure sensor; 32. Ball screw; 33. Servo motor. Detailed Implementation

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] This utility model embodiment provides a PTC heater curing device, such as Figures 1-6 As shown, it includes a frame 1, with a sealed curing box 2 on top of it. The two ends of the curing box 2 are connected to form a curing cavity for the passage of the carrier.

[0035] A set of lifting plates 3 are vertically spaced and slidably distributed inside the curing box 2;

[0036] Two lifting plates 3 divide the curing chamber into an independent and sealed preheating zone 4, a heating and curing zone 5, and a cooling zone 6;

[0037] A feed block 7 is provided on the frame 1 along its axial direction, and the feed block 7 is slidably engaged with the frame 1.

[0038] The feed block 7 is provided with an L-shaped support frame 8, which is formed by a right-angle support surface by a first vertical plate 9 and a second horizontal plate 10 connected vertically.

[0039] A set of electric push rods 11 are symmetrically distributed on both sides of the support frame 8;

[0040] Each electric push rod 11 has a limiting plate 12 connected to the end of the piston rod. The support frame 8 and the limiting plates 12 on both sides dynamically enclose and form a semi-enclosed solidification carrier.

[0041] The inner surface of the vehicle is provided with a composite ceramic fiber heat insulation layer 13.

[0042] It should be noted that existing PTC heater curing devices suffer from problems such as unstable fixation, high-temperature oxidation, harmful gas emissions, and low processing efficiency. This solution is significantly effective in ensuring the curing quality of PTC heaters, improving curing efficiency, and reducing energy consumption. On the one hand, the electric push rods 11 on both sides of the support frame 8, in conjunction with the pressure sensor 31, securely clamp the PTC heater. The curing chamber is divided into zones to achieve independent temperature and humidity control in each area. The infrared radiation heater 21 in the preheating zone 4, in conjunction with the dual-channel temperature sensing module 22, ensures uniform heating of the PTC heater. The high-power rapid curing in the heating and curing zone 5, along with nitrogen protection and a waste gas treatment system to isolate oxygen and purify waste gas, provide multiple safeguards to ensure the stable and reliable curing quality of the PTC heater. On the other hand, the composite ceramic fiber insulation layer 13 on the inner surface of the carrier reduces heat loss, the automated transmission system accelerates the production pace, the zoning and independent temperature control mechanism in the curing chamber precisely controls the curing conditions at each stage, and the sealing door 27 and the hydraulic cylinder 28 of the lifting plate 3 work together to form an independent sealed curing environment to reduce heat exchange, effectively improving curing efficiency and reducing energy consumption.

[0043] Specifically, in this embodiment, the solution mainly includes a frame 1, on which the PTC heater is placed; at this time, the electric push rods 11 on both sides of the support frame 8 synchronously drive the piston rod to extend, causing the limiting plate 12 to move towards the carrier, forming a semi-enclosed structure together with the support frame 8, which securely clamps the PTC heater in it, preventing it from shifting or tipping over during movement; the composite ceramic fiber heat insulation layer 13 on the inner surface of the carrier can effectively reduce heat transfer to the outside of the carrier, improve curing efficiency and reduce energy consumption;

[0044] Subsequently, the feed block 7 slides along the axial direction of the frame 1, driving the carrier into the curing chamber of the sealed curing box 2; the curing chamber is divided into a preheating zone 4, a heating and curing zone 5, and a cooling zone 6 by vertically sliding lifting plates 3, and each zone can independently control parameters such as temperature and humidity; when the carrier moves to the preheating zone 4, the corresponding lifting plate 3 descends to close the zone, preheating the PTC heater so that its temperature rises uniformly to the set value, preparing for subsequent curing;

[0045] After preheating is completed, the feed block 7 continues to move the carrier to the heating and curing zone 5; at this time, the corresponding lifting plate 3 in this zone descends to form an independent sealed space, and the device uses a higher power heating method to quickly cure the PTC heater, ensuring that the glue or adhesive is completely cured and a stable structure is formed.

[0046] After curing, the carrier enters the cooling zone 6; the lifting plate 3 of the cooling zone 6 descends into the enclosed space, and the device rapidly reduces the temperature of the PTC heater through forced air cooling to avoid material cracking or performance degradation due to sudden temperature drop;

[0047] During the cooling process, the electric push rod 11 can adjust the position of the limiting plate 12 as appropriate to facilitate the removal of the subsequent carrier or the continued loading; after curing is completed, the feed block 7 moves the carrier out of the curing chamber, the electric push rod 11 retracts the limiting plate 12, and the operator can remove the cured PTC heater and prepare for the next round of curing process.

[0048] In a further preferred embodiment of this utility model, such as Figure 6 As shown, the top of the sealed curing chamber 2 is equipped with a nitrogen input pipe 14, the end of which is connected to a swirl gas distributor 15, and the bottom is equipped with a waste gas discharge channel 16, which is connected to a filter box 17. Inside the filter box 17, a primary metal filter screen 18, a molecular sieve adsorption layer 19, and an activated carbon fiber layer 20 are distributed in sequence according to the airflow direction.

[0049] In this embodiment, during the curing process of the PTC heater, in order to prevent the material from oxidizing or generating harmful gases due to the high temperature environment, the system continuously introduces high-purity nitrogen through the nitrogen input pipe 14 at the top of the curing chamber 2; after the nitrogen is evenly dispersed by the swirl gas distributor 15 at the end of the pipe, it is injected into the curing chamber in the form of a spiral airflow to form a stable inert gas protective layer, effectively isolating oxygen and diluting potential harmful volatiles in the chamber.

[0050] The waste gas generated during the curing process is driven by the flow of nitrogen and discharged from the waste gas discharge channel 16 at the bottom of the curing box 2. The waste gas first enters the connected filter box 17 and passes through a triple purification structure: the primary metal filter 18 intercepts large dust particles, the molecular sieve adsorption layer 19 selectively adsorbs specific molecules, and the activated carbon fiber layer 20 deeply adsorbs volatile organic compounds and odors. After multi-stage filtration, the gas meets the emission standards and is discharged to avoid harm to the environment and operators.

[0051] In a further preferred embodiment of this utility model, such as Figure 3As shown, multiple sets of infrared radiation heaters 21 (OSL312) are respectively installed inside the preheating zone 4 and the heating and curing zone 5. The infrared radiation heaters 21 are embedded in the side wall of the curing chamber 2 in a honeycomb matrix arrangement. Each set of infrared radiation heaters 21 is equipped with a dual-channel temperature sensing module 22. The dual-channel temperature sensing module 22 includes an infrared thermal imaging sensor 23 (FLIR Lepton 3.5) and a K-type armored thermocouple 24 (OMEGA TJ36-CASS-14U-6).

[0052] In this embodiment, efficient and uniform heat transfer is achieved through densely arranged infrared radiation sources; each group of infrared radiation heaters 21 operates independently, forming a controllable radiative heat field that directly acts on the surface of the PTC heater, causing it to rapidly heat up to the target temperature range.

[0053] To ensure the accuracy and stability of temperature control, each infrared radiation heater 21 is equipped with a dual-channel temperature sensing module 22. The infrared thermal imaging sensor 23 captures the infrared radiation intensity on the surface of the PTC heater in real time through non-contact scanning, generating a heat distribution image that intuitively reflects the overall temperature uniformity. The K-type armored thermocouple 24 provides high-precision numerical feedback by contact measurement of the actual temperature at key points. The data from both complement each other, forming a redundant monitoring mechanism to ensure stable material performance and reduce the risk of thermal damage.

[0054] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a variable frequency centrifugal fan 25 is installed at the top of the cooling zone 6, and an infrared thermal imager 26 (FLIR E5-XT) is installed on the inner side of the curing chamber adjacent to the variable frequency centrifugal fan 25.

[0055] In this embodiment, when the cooling zone 6 is started, the top variable frequency centrifugal fan 25 generates a controllable airflow through motor speed adjustment, blowing cooling airflow downwards to the surface of the PTC heater in the curing chamber; the infrared thermal imager 26 scans the heat distribution of the PTC heater in real time and transmits the temperature data to the external control system in the form of thermal imaging; the external control system combines the real-time temperature difference and uniformity information fed back by the thermal imager to dynamically adjust the speed of the variable frequency centrifugal fan 25: if the local temperature is detected to be too high or the overall cooling rate is insufficient, the speed of the variable frequency centrifugal fan 25 is increased to enhance air convection; if the temperature is close to the target value or the temperature difference tends to be stable, the speed is reduced to avoid over-cooling; through the continuous monitoring of the infrared thermal imager 26 and the precise control of the variable frequency centrifugal fan 25, the device can achieve safe and uniform cooling of the PTC heater during the cooling stage, effectively preventing thermal stress damage and improving curing quality.

[0056] In a further preferred embodiment of this utility model, such as Figures 1-3As shown, the curing chamber 2 has sealing doors 27 that slide vertically at both ends of the opening. The top side of the curing chamber 2 is provided with two sets of hydraulic cylinders 28. The output end of one set of hydraulic cylinders 28 is connected to the two sealing doors 27, and the output end of the other set of hydraulic cylinders 28 is connected to the two lifting plates 3.

[0057] In this embodiment, vertically sliding sealing doors 27 are configured at both ends of the curing chamber 2 to achieve dynamic sealing of the curing chamber; two sets of hydraulic cylinders 28 work together. When the carrier needs to enter or exit the curing chamber 2, the sealing door 27 hydraulic cylinder 28 retracts to open the channel; when the carrier enters the designated area, the sealing door 27 hydraulic cylinder 28 extends out of the closed cavity, and at the same time, the lifting plate 3 hydraulic cylinder 28 adjusts the height of each area according to the process requirements to form an independently sealed curing environment.

[0058] In a further preferred embodiment of this utility model, such as Figures 1-2 As shown, a transparent viewing window 29 is opened on the side wall of the curing chamber 2, and an embedded sealing strip 30 is provided around the viewing window 29.

[0059] In this embodiment, a transparent viewing window 29 is provided on the side wall of the curing chamber 2, which allows the operator to observe the curing status of the internal PTC heater in real time. At the same time, sealing strips 30 are embedded around the viewing window 29. The elastic deformation of the strips tightly adheres to the wall of the curing chamber 2, forming an airtight barrier. When nitrogen protection, heating or cooling processes are carried out in the curing chamber 2, the sealing strips 30 can effectively isolate external environmental interference, ensuring stable chamber pressure and uniform temperature field.

[0060] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a pressure sensor 31 (HSC015A) is embedded inside the bearing surface of the limiting plate 12.

[0061] In this embodiment, the pressure sensor 31 inside the limiting plate 12 monitors and provides feedback to adjust the clamping pressure in real time, ensuring the stability of the carrier throughout the curing process.

[0062] In a further preferred embodiment of this utility model, such as Figures 1-2 As shown, a ball screw 32 is installed in the frame 1 through bearings. A servo motor 33 is provided at the end of the frame 1. The output end of the servo motor 33 is fixedly connected to the ball screw 32 through a flexible coupling. The ball screw 32 is threadedly engaged with the feed block 7.

[0063] In this embodiment, the servo motor 33 starts its rotational motion and transmits it to the ball screw 32 via the flexible coupling. The flexible coupling can absorb motor vibration and installation deviation, ensuring smooth transmission, so that the feed block 7 is accurately positioned at the designated positions of the preheating zone 4, the heating and curing zone 5 and the cooling zone 6, realizing the automated transmission of the carrier in the curing cavity.

[0064] Working principle: When the PTC heater is placed on the carrier, the electric push rods 11 on both sides of the support frame 8 synchronously drive the piston rod to extend, causing the limiting plate 12 to move towards the carrier, forming a semi-enclosed structure with the support frame 8, which firmly clamps the PTC heater in it, preventing it from shifting or tipping over during movement; the pressure sensor 31 on the inner side of the limiting plate 12 ensures the stability of the carrier throughout the curing process through real-time monitoring and feedback adjustment; the composite ceramic fiber heat insulation layer 13 on the inner surface of the carrier can effectively reduce heat transfer to the outside of the carrier, improve curing efficiency and reduce energy consumption;

[0065] The servo motor 33 starts its rotational motion and transmits it to the ball screw 32 via a flexible coupling. The flexible coupling can absorb the vibration of the servo motor 33 and installation deviation, ensuring smooth transmission. This allows the feed block 7 to be precisely positioned in the designated positions of the preheating zone 4, the heating and curing zone 5, and the cooling zone 6, realizing the automated transmission of the carrier in the curing chamber. The feed block 7 slides along the axial direction of the frame 1, driving the carrier into the curing chamber of the sealed curing box 2. The curing chamber is divided into the preheating zone 4, the heating and curing zone 5, and the cooling zone 6 by vertically sliding lifting plates 3. The temperature, humidity, and other parameters of each zone can be independently controlled.

[0066] The curing chamber 2 is equipped with vertically sliding sealing doors 27 at both ends to achieve dynamic sealing of the curing chamber. Two sets of hydraulic cylinders 28 are installed at the top of the device. One set of hydraulic cylinders 28 has its output end connected to the two sealing doors 27, driving the sealing doors 27 to rise and fall vertically through extension and retraction, thus controlling the opening and closing of both ends of the curing chamber 2. The other set of hydraulic cylinders 28 has its output end connected to two lifting plates 3, driving the lifting plates 3 to move vertically through extension and retraction, thus achieving independent separation or connection of the internal space of the curing chamber. The two sets of hydraulic cylinders 28 work together: when the carrier needs to enter or exit the curing chamber 2, the sealing door 27 hydraulic cylinder 28 retracts to open the passage; when the carrier enters the designated area, the sealing door 27 hydraulic cylinder 28 extends out to close the cavity, while the lifting plate 3 hydraulic cylinder 28 adjusts the height of each area according to process requirements, forming an independently sealed curing environment.

[0067] When the carrier moves to the preheating zone 4, the corresponding lifting plate 3 descends to close the area. Within the preheating zone 4 and the heating and curing zone 5, multiple sets of infrared radiation heaters 21 are embedded in the sidewall of the curing chamber 2 in a honeycomb matrix. The densely arranged infrared radiation sources achieve efficient and uniform heat transfer. Each set of infrared radiation heaters 21 operates independently, forming a controllable radiative heat field that directly acts on the surface of the PTC heater, causing its temperature to rise uniformly to the set value, preparing it for subsequent curing. To ensure the accuracy and stability of temperature control, each set of infrared radiation heaters 21 is equipped with a dual-channel temperature sensing module 22. Among them, the infrared thermal imaging sensor 23 captures the infrared radiation intensity of the PTC heater surface in real time through non-contact scanning, generating a heat distribution image that intuitively reflects the overall temperature uniformity. The K-type armored thermocouple 24 provides high-precision numerical feedback by contact measurement of the actual temperature at key points. The data from both complement each other, forming a redundant monitoring mechanism to ensure stable material performance and reduce the risk of thermal damage.

[0068] After preheating is completed, the feed block 7 continues to move the carrier to the heating and curing zone 5; at this time, the corresponding lifting plate 3 in this zone descends to form an independent sealed space, and the device uses a higher power heating method to quickly cure the PTC heater, ensuring that the glue or adhesive is completely cured and a stable structure is formed.

[0069] After curing, the carrier enters the cooling zone 6; the lifting plate 3 of the cooling zone 6 descends to enclose the space, and the device starts cooling through the top variable frequency centrifugal fan 25; the fan generates a controllable airflow through motor speed adjustment, blowing cooling airflow downwards to the surface of the PTC heater in the curing chamber; the infrared thermal imager 26 scans the heat distribution of the PTC heater in real time and transmits the temperature data to the external control system in the form of thermal imaging; the external control system combines the real-time temperature difference and uniformity information fed back by the thermal imager to dynamically adjust the speed of the variable frequency centrifugal fan 25: if the local temperature is detected to be too high or the overall cooling rate is insufficient, the speed of the variable frequency centrifugal fan 25 is increased to enhance air convection; if the temperature is close to the target value or the temperature difference tends to be stable, the speed is reduced to avoid over-cooling; through the continuous monitoring of the infrared thermal imager 26 and the precise control of the variable frequency centrifugal fan 25, the device can achieve safe and uniform cooling of the PTC heater during the cooling stage, effectively preventing thermal stress damage and improving curing quality;

[0070] During the cooling process, the electric push rod 11 can adjust the position of the limiting plate 12 as appropriate, so as to facilitate the removal of the subsequent vehicle or the continued loading.

[0071] During the PTC heater curing process, to prevent material oxidation or the generation of harmful gases caused by the high-temperature environment, high-purity nitrogen is continuously introduced into the system through the nitrogen input pipe 14 at the top of the curing chamber 2. After being evenly dispersed by the swirl-type gas distributor 15 at the end of the pipe, the nitrogen is injected into the curing chamber in the form of a spiral airflow, forming a stable inert gas protective layer, effectively isolating oxygen and diluting potential harmful volatiles in the chamber. The waste gas generated during the curing process is driven by the flow of nitrogen and discharged from the waste gas discharge channel 16 at the bottom of the curing chamber 2. The waste gas first enters the connected filter box 17 and passes through a triple purification structure in sequence: the primary metal filter 18 intercepts large dust particles, the molecular sieve adsorption layer 19 selectively adsorbs specific molecules, and the activated carbon fiber layer 20 deeply adsorbs volatile organic compounds and odors. After multi-stage filtration, the gas meets the emission standards and is discharged, avoiding harm to the environment and operators.

[0072] After curing is complete, the feed block 7 moves the carrier out of the curing chamber, the electric push rod 11 retracts the limit plate 12, and the operator can take out the cured PTC heater and prepare for the next curing process.

[0073] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0074] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above may be implemented in other ways in practice. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0075] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0076] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A PTC heater curing device, characterized in that, include: The frame has a sealed curing chamber on top, with both ends of the curing chamber connected to form a curing cavity for the carrier to pass through; A set of lifting plates are arranged at intervals along the vertical direction inside the curing chamber; Two lifting plates divide the curing chamber into an independent, sealed preheating zone, a heating and curing zone, and a cooling zone; A feed block is provided on the frame along its axial direction, and the feed block is in sliding fit with the frame. The feed block is equipped with an L-shaped support frame, which is formed by a right-angle support surface by a first vertical plate and a second horizontal plate connected vertically. A set of electric push rods is symmetrically distributed on both sides of the support frame; Each electric push rod piston rod end is connected to a limiting plate, and the support frame and the limiting plates on both sides dynamically enclose to form a semi-enclosed curing carrier. The inner surface of the vehicle is equipped with a composite ceramic fiber heat insulation layer.

2. The PTC heater curing apparatus as described in claim 1, characterized in that, The sealed curing chamber is equipped with a nitrogen input pipe at the top, and the end of the pipe is connected to a swirl gas distributor. The bottom is equipped with an exhaust channel, which is connected to a filter box. Inside the filter box, a primary metal filter, a molecular sieve adsorption layer, and an activated carbon fiber layer are arranged in sequence according to the airflow direction.

3. The PTC heater curing apparatus as described in claim 2, characterized in that, Multiple sets of infrared radiation heaters are installed inside the preheating zone and the heating and curing zone. The infrared radiation heaters are embedded in the side wall of the curing chamber in a honeycomb matrix arrangement. Each set of infrared radiation heaters is equipped with a dual-channel temperature sensing module, which includes an infrared thermal imaging sensor and a K-type armored thermocouple.

4. The PTC heater curing apparatus as described in claim 1, characterized in that, A variable frequency centrifugal fan is installed at the top of the cooling zone, and an infrared thermal imager is installed on the inner side of the curing chamber adjacent to the variable frequency centrifugal fan.

5. The PTC heater curing apparatus as described in claim 3, characterized in that, The curing chamber has sealed doors that slide vertically at both ends of the opening. There are two sets of hydraulic cylinders on the top side of the curing chamber. The output end of one set of hydraulic cylinders is connected to the two sealed doors, and the output end of the other set of hydraulic cylinders is connected to the two lifting plates.

6. The PTC heater curing apparatus as described in claim 5, characterized in that, A transparent viewing window is provided on the side wall of the curing chamber, and an embedded sealing strip is provided around the viewing window.

7. The PTC heater curing apparatus as described in claim 1, characterized in that, A pressure sensor is embedded on the inner side of the bearing surface of the limiting plate.

8. The PTC heater curing apparatus as described in claim 1, characterized in that, A ball screw is installed inside the frame via bearings. A servo motor is located at the end of the frame. The output end of the servo motor is fixedly connected to the ball screw via a flexible coupling. The ball screw is threadedly engaged with the feed block.

Images