An infrared imaging furnace temperature detection device

Abstract

This utility model relates to the field of industrial boiler temperature measurement technology, specifically disclosing an infrared imaging furnace temperature detection device, including a thermometer body, a display panel, and a microphone array module. The display panel is rotatably mounted on the top of the thermometer body via a hinge, and the microphone array module is fixedly mounted on the front of the display panel. The upper half of the protective frame is closed to prevent impacts from above, while the lower half is open for easy disassembly and assembly of the lens module. The air vent, through an air curtain, reduces dust and smoke contamination of the lens at the source. The cleaning scraper, made of polytetrafluoroethylene, driven by a micro-drive motor and other components, can scrape away dust and impurities from the lens surface without scratching it, ensuring lens cleanliness and guaranteeing imaging and temperature measurement accuracy. The protective frame, cleaning scraper, and other structures also optimize and protect key components such as the lens with IP65 dustproof and waterproof design from different angles, further enhancing the overall reliability and durability of the device.

Description

Technical Field

[0001] This utility model relates to the field of industrial boiler temperature measurement technology, specifically an infrared imaging furnace temperature detection device. Background Technology

[0002] In the chemical and energy industries, industrial boilers (including coal-fired boilers, gas-fired boilers, and electric furnaces) and their supporting pipelines are core production equipment. Their main function is to provide a stable heat source for processes such as chemical synthesis reactions, material distillation and concentration, and high-temperature heating, directly determining the continuity of production, the stability of product quality, and energy utilization efficiency. For example, in the coal chemical ammonia synthesis process, the steam boiler needs to maintain a stable steam output of 400-450℃ to ensure catalyst activity; in the fine chemical distillation process, the temperature fluctuation of the thermal oil boiler needs to be controlled within ±2℃, otherwise it will lead to a 10%-15% decrease in product purity, or even cause safety accidents.

[0003] Existing infrared temperature measurement devices have two major problems: First, poor heat dissipation performance. The internal infrared detection chip is prone to performance drift in high-temperature environments and lacks an efficient heat dissipation structure. The continuous working time of the device is usually no more than 2 hours. Second, low ease of operation. Fixed installation devices cannot flexibly monitor different boiler or pipeline locations, while handheld devices lack a stable grip structure, such as no elastic strap or anti-slip design on the handpiece. Prolonged operation can easily lead to hand fatigue, and they cannot achieve unattended fixed monitoring, making it difficult to meet the dual needs of mobile inspection and fixed duty in chemical workshops. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides an infrared imaging furnace temperature detection device, which solves the problems of existing infrared temperature measurement devices being unable to achieve unattended fixed monitoring and being difficult to adapt to the dual needs of mobile inspection and fixed duty in chemical workshops.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an infrared imaging furnace temperature detection device, comprising a thermometer body, a display panel, and a microphone array module. The display panel is rotatably mounted on the top of the thermometer body via a hinge, and the microphone array module is fixedly mounted on the front of the display panel. Two connecting blocks are fixedly mounted on the left side of the thermometer body, and a handheld part is fixedly mounted on the side of the two connecting blocks near the thermometer body. An elastic strap is also fixedly mounted on the other side of the two connecting blocks.

[0006] A lens connector is fixedly mounted on the front of the thermometer body, and a lens module is threadedly connected to the front of the lens connector. A protective frame is fixedly mounted on the front of the thermometer body, outside the lens module. An annular groove is provided on the front side of the inside of the protective frame, and a rotating frame is rotatably mounted inside the annular groove. A fixing block is fixedly mounted on one side of the inner wall of the rotating frame, and a micro servo electric cylinder is fixedly mounted on one side inside the fixing block. A telescopic block is slidably mounted on the other side inside the fixing block, and the drive end of the micro servo electric cylinder is fixedly connected to one side of the telescopic block. A cleaning scraper is fixedly mounted on one side of both the fixing block and the telescopic block. A micro drive motor is fixedly mounted on the outer circumference of the protective frame through a mounting frame, and a drive gear is fixedly mounted on one end of the output shaft of the micro drive motor. An annular tooth groove is provided on the outer circumference of the rotating frame, and the tooth surface of the drive gear meshes with the tooth surface of the annular tooth groove for transmission.

[0007] Preferably, the protective frame is designed with a closed upper half and an open lower half.

[0008] Preferably, one side of each of the two cleaning scrapers is in contact with the outer surface of the lens module.

[0009] Preferably, the protective frame has several air vents on its front side, and the air vents are distributed at equal angles about the central axis of the lens module. Each of the air vents is a narrow slit that is inclined at 45° to the central axis of the lens module.

[0010] Preferably, a miniature air pump is provided on one side of the back of the thermometer body, and the air outlet of the miniature air pump is connected to a cooling coil. One side of the cooling coil is attached to the chip encapsulation inside the thermometer body, and the other end of the cooling coil is connected to a duct.

[0011] Preferably, one end of the air guide tube penetrates the interior of the thermometer body and communicates with the interior of the protective frame. The interior of the protective frame is provided with an air guide groove, and the interior of the air guide groove is connected to the interior of several air outlets.

[0012] This invention provides an infrared imaging furnace temperature detection device. Compared with the prior art, it has the following advantages:

[0013] The thermometer's main body features a handheld grip and elastic strap, significantly improving stability during manual operation and facilitating flexible on-site detection. The threaded connection holes on the connecting block can mate with the connecting frame to secure the main body, eliminating the need for continuous manual operation and adapting to various detection scenarios. Simultaneously, the display panel provides a clear view of the furnace temperature using infrared imaging, and the microphone array module can acquire acoustic images of industrial boilers in the 2kHz-100kHz frequency band, enriching the detection dimensions and enabling a comprehensive understanding of the equipment's operating status.

[0014] The upper part of the protective frame is closed to prevent impacts from above, while the lower part is open to facilitate the disassembly and assembly of the lens module. The air vent, through an air curtain, can reduce dust and smoke pollution to the lens at the source. The cleaning scraper is made of polytetrafluoroethylene and, driven by components such as a miniature drive motor, can scrape away dust and impurities on the lens surface without scratching the lens. This multi-faceted approach ensures lens cleanliness and guarantees imaging and temperature measurement accuracy.

[0015] The heat dissipation system, consisting of a miniature air pump and cooling coils, effectively removes heat from the internal chip of the thermometer, ensuring that the components operate at a suitable temperature and improving the stability and lifespan of the device. The protective frame, cleaning scraper, and other structures also protect key components such as the lens from different angles, further enhancing the overall reliability and durability of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an infrared imaging furnace temperature detection device according to the present invention;

[0017] Figure 2 This is a schematic diagram of the lens connector, lens module, and protective frame structure in this utility model;

[0018] Figure 3 This is a schematic diagram of the rotating frame, fixed block, and telescopic block structure in this utility model;

[0019] Figure 4 This is a schematic diagram of the protective frame, annular groove, and annular toothed groove structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the micro air pump and air delivery tube structure in this utility model;

[0021] Figure 6 This is a schematic diagram of the cooling coil and air duct structure in this utility model;

[0022] Figure 7 This is a cross-sectional view of the protective frame, air guide groove, and air outlet structure in this utility model.

[0023] In the diagram: 1. Thermometer body; 2. Display panel; 3. Microphone array module; 4. Handheld part; 5. Connecting block; 6. Elastic strap; 7. Lens connector; 8. Lens module; 9. Protective frame; 10. Annular groove; 11. Rotating frame; 12. Annular toothed groove; 13. Drive gear; 14. Miniature drive motor; 15. Fixing block; 16. Telescopic block; 17. Miniature servo cylinder; 18. Cleaning scraper; 19. Miniature air pump; 20. Cooling coil; 21. Air guide pipe; 22. Air guide groove; 23. Air outlet. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0025] Please see Figures 1 to 7 As shown, this embodiment proposes an infrared imaging furnace temperature detection device, including a thermometer body 1, a display panel 2, and a microphone array module 3. The display panel 2 is rotatably mounted on the top of the thermometer body 1 via a hinge, and the microphone array module 3 is fixedly mounted on the front of the display panel 2. The display panel 2 displays the infrared image of the furnace temperature, and the microphone array module 3, in conjunction with the display panel 2, performs imaging and acquisition of the acoustic frequency band of 2KHZ-100KHZ during the operation of the industrial boiler. Two connecting blocks 5 are fixedly mounted on the left side of the thermometer body 1, and a connection is fixed between the two connecting blocks 5 on the side closer to the thermometer body 1. The device is equipped with a handheld part 4, and an elastic strap 6 is fixedly installed on the other side between the two connecting blocks 5. Each of the two connecting blocks 5 has a threaded connection hole inside for connecting with the connecting frame. After the connecting blocks 5 are connected to the connecting frame, the thermometer body 1 can be fixedly set, thus eliminating the need for manual operation. In daily use of the infrared imaging furnace temperature detection device, manual handheld operation is performed by the operator holding the handheld part 4 with their right hand, and the elastic strap 6 is used to restrain the back of the operator's hand, which can greatly improve the stability of the operator's handheld operation of the thermometer body 1.

[0026] It should be noted that the shell seams of the thermometer body 1 adopt a composite process of ultrasonic welding and sealing strips: the main shell splice is formed by ultrasonic welding to form the first seal, and the weld seam width is ≥3mm; a 0.5mm thick nitrile rubber sealing strip is added to the inside, and a secondary seal is achieved by the shell assembly pressure; the hinge part between the display panel 2 and the thermometer body 1 adopts a waterproof hinge structure, and the hinge bushing has a built-in double lip seal, with the lips facing inward for dust prevention and outward for waterproofing, and the rotating parts are filled with food-grade grease to reduce the wear of the seal.

[0027] The gap between the handle 4 and the connecting block 5 is filled with high-temperature resistant sealant. The fixing bolts of the elastic strap 6 are waterproof bolts with O-rings, and polytetrafluoroethylene sealing gaskets are set at the bottom of the bolt holes. The threaded connection holes of the connecting block 5 need to be equipped with silicone sealing caps when not in use. The caps and the holes are fitted together to achieve dust and water protection. When in use, the sealing caps can be stored in a special slot on the side of the connecting block.

[0028] Furthermore, a lens connector 7 is fixedly installed on the front of the thermometer body 1, and a lens module 8 is connected to the front of the lens connector 7 via threads. A protective frame 9 is fixedly installed on the front of the thermometer body 1 and outside the lens module 8. The protective frame 9 has a closed upper half and an open lower half design. The closed upper half of the protective frame 9 provides safety protection for the upper part of the lens module 8, preventing it from being hit from above. At the same time, the open lower half facilitates the disassembly and assembly of the lens module 8 and the lens connector 7. A small optical sensor is also installed on one side of the inner wall of the protective frame 9, close to the lens module 8. This small optical sensor can be an Omron E3AS-HF series laser displacement sensor, used to automatically detect the degree of lens contamination. The small optical sensor triggers the surface cleaning operation of the lens module 8 as needed by using differential image analysis combined with baseline comparison method.

[0029] It should be noted that the threaded connection between the lens connector 7 and the lens module 8 has an added sealing design on the basis of the original thread: a 1.5mm deep sealing groove is machined at the root of the thread, and an EPDM rubber O-ring with a cross section of Φ2mm is embedded. The thread surface is coated with low-volatile silicone waterproof adhesive, which forms an elastic sealing film after curing. During assembly, a cross-symmetrical tightening method is used to ensure that the sealing surface fits evenly, achieving an IP66 sealing capability for the threaded connection.

[0030] Meanwhile, an annular sealing groove is machined on the connection surface between the protective frame 9 and the thermometer body 1, and an FKM fluororubber O-ring with a cross-sectional diameter of 3mm is embedded. During assembly, a compression of 25%-30% is ensured, and micro-gaps are filled through elastic deformation. A 3mm wide drainage groove is added to the lower half of the protective frame 9 opening, and it is arranged at a 15° angle along the edge of the opening to ensure that the water accumulated after the water spray test can be completely drained within 10 seconds, avoiding the formation of a water accumulation area. The protective frame 9 is made of 304 stainless steel, and all exposed metal parts are passivated. The sealing materials have all passed a 72-hour salt spray test.

[0031] Furthermore, an annular groove 10 is provided on the front side inside the protective frame 9, and a rotating frame 11 is rotatably arranged inside the annular groove 10. A fixing block 15 is fixedly arranged on one side of the inner wall of the rotating frame 11, and a micro servo electric cylinder 17 is fixedly arranged on one side inside the fixing block 15. A telescopic block 16 is slidably arranged on the other side inside the fixing block 15, and the drive end of the micro servo electric cylinder 17 is fixedly connected to one side of the telescopic block 16. A cleaning scraper 18 is fixedly arranged on one side of both the fixing block 15 and the telescopic block 16, and one side of both cleaning scrapers 18 is in contact with the outer surface of the lens module 8.

[0032] Furthermore, a micro drive motor 14 is fixedly mounted on the outer periphery of the protective frame 9 via a mounting frame, and a drive gear 13 is fixedly mounted on one end of the output shaft of the micro drive motor 14. The micro drive motor 14 is located inside the mounting frame and is ceramic-encapsulated to ensure the high temperature resistance of the micro drive motor 14. The outer periphery of the rotating frame 11 is provided with an annular toothed groove 12, and the tooth surface of the drive gear 13 meshes with the tooth surface of the annular toothed groove 12 for transmission.

[0033] It should be noted that after the infrared imaging furnace temperature detection device is used, dust and impurities from the surrounding environment of the boiler are easily attached to the outer peripheral surface of the lens module 8. At this time, the output shaft of the micro drive motor 14 controls the drive gear 13 to rotate. The meshing transmission relationship between the drive gear 13 and the annular tooth groove 12 allows the rotating frame 11 to rotate synchronously with the rotation of the drive gear 13. At this time, the micro servo electric cylinder 17 inside the fixed block 15 drives the telescopic block 16 to fully extend. During the rotation of the rotating frame 11, the cleaning scraper 18 at the bottom of the fixed block 15 and the telescopic block 16 slides in contact with the surface of the lens module 8 to scrape off the dust and impurities on the surface of the lens module 8. The cleaning scraper 18 is made of polytetrafluoroethylene, which has the characteristics of high temperature resistance and softness that will not scratch the lens.

[0034] Furthermore, in order to effectively reduce the amount of impurities and dust in the environment adhering to the surface of the lens module 8 during the use of the thermometer body 1 and ensure the cleanliness of the lens module 8 during use, the protective frame 9 is provided with several air outlets 23 on the front side. The air outlets 23 are distributed at equal angles about the central axis of the lens module 8. The air outlets 23 are all set with narrow slits at an angle of 45° to the central axis of the lens module 8. When the thermometer body 1 is in use, the air outlets 23 blow air to form an air curtain barrier on the outside of the lens module 8, directly blocking dust and smoke from approaching the lens and reducing lens contamination from the source.

[0035] It should be noted that the air outlet 23 adopts a composite structure design of dustproof net and flow guide baffle. A 75μm diameter metal dustproof net is added to the inside of each 45° inclined narrow slit air outlet 23 to meet the IP65 requirement of blocking dust ≥75μm. The net surface is treated with fluorocarbon coating to improve the oil stain resistance. A polytetrafluoroethylene flow guide baffle is set on the inside of the dustproof net, forming a 3mm wide tortuous airflow channel with the air outlet 23. This ensures the normal spraying of the air curtain and blocks the reverse splashing of water droplets through fluid dynamics design.

[0036] Furthermore, a miniature air pump 19 is provided on one side of the back of the thermometer body 1, and the air outlet of the miniature air pump 19 is connected to a cooling coil 20. One side of the cooling coil 20 is attached to the chip encapsulation inside the thermometer body 1, and the other end of the cooling coil 20 is connected to a duct 21. One end of the duct 21 penetrates the interior of the thermometer body 1 and communicates with the interior of the protective frame 9. The interior of the protective frame 9 is provided with a duct groove 22, and the interior of the duct groove 22 is connected to the interior of several air outlets 23. One end of the duct 21 extends into the interior of the duct groove 22. Air is blown into the interior of the cooling coil 20 by the miniature air pump 19. The air flowing inside the cooling coil 20 carries away the heat inside the thermometer body 1. Then the air enters the interior of the duct 21, and finally enters the interior of several air outlets 23 through the duct groove 22. The hot air is blown out through the several air outlets 23 to form an air curtain barrier for pollution protection.

[0037] It should be noted that the connection between the air duct 21 and the protective frame 9 adopts an SAE standard quick-connect connector, which has a built-in double sealing structure: the main seal uses an FVMQ fluorosilicone rubber O-ring with a cross-section of Φ1.8mm, which can withstand temperature fluctuations from -40℃ to 150℃; the secondary seal uses a polytetrafluoroethylene retaining ring to prevent excessive compression of the O-ring; the insertion depth of the connector is mechanically limited to ensure that the O-ring compression is stable between 20% and 30%, which meets the long-term sealing requirements under 500kPa pressure; in addition, the outlet of the micro air pump 19 adopts an IP68 waterproof connector, and the cable entry point is sealed with the connector through a vulcanization process.

[0038] In summary, the handheld part 4 and elastic strap 6 equipped on the main body 1 of the temperature measuring instrument significantly improve stability during manual hand operation, facilitating flexible on-site detection. The threaded connection hole of the connecting block 5 can cooperate with the connecting frame to achieve a fixed setting of the main body, eliminating the need for continuous manual operation and adapting to different detection scenarios. At the same time, the display panel 2 can intuitively display the furnace temperature infrared image, and the microphone array module 3 can image and acquire acoustic frequency bands of 2KHZ-100KHZ for industrial boilers, enriching the detection dimensions and facilitating a comprehensive understanding of the equipment's operating status.

[0039] The upper half of the protective frame 9 is closed to prevent impacts from above, while the lower half is open to facilitate the disassembly and assembly of the lens module 8. The air vent 23 reduces dust and smoke pollution to the lens at the source through an air curtain. The cleaning scraper 18 is made of polytetrafluoroethylene and, driven by components such as the micro drive motor 14, can scrape away dust and impurities on the lens surface without scratching the lens. This multi-faceted approach ensures lens cleanliness and guarantees imaging and temperature measurement accuracy.

[0040] The heat dissipation system, consisting of a miniature air pump 19 and a cooling coil 20, can effectively remove the heat from the chip inside the thermometer body 1, ensuring that the components operate at a suitable temperature and improving the stability and service life of the device. The protective frame 9, cleaning scraper 18 and other structures also protect key components such as the lens from different angles, further enhancing the overall reliability and durability of the device.

[0041] Specifically, this embodiment also discloses the working principle of an infrared imaging furnace temperature detection device, as follows:

[0042] The lens module 8 converts the received infrared radiation signal into an electrical signal, which is then transmitted to the processing module inside the thermometer body 1. The processing module analyzes and processes the electrical signal, converting it into intuitive temperature data and infrared images using a specific algorithm, and displays them on the display panel 2, allowing operators to clearly understand the temperature distribution inside the boiler. Simultaneously, the microphone array module 3, mounted on the front of the display panel 2, collects sound signals in the 2kHz-100kHz acoustic frequency band generated by the industrial boiler during operation. The microphones convert the sound signals into electrical signals, and then, using the phased array principle, analyzes and processes the signals from multiple microphones to determine the location of the sound source, presenting it as an image on the display panel 2. This helps operators determine if there are abnormal sounds from the boiler and the location of the sound source, assisting in assessing the equipment's operating status.

[0043] During device use, the miniature air pump 19 plays a crucial role in reducing dust and impurities adhering to the surface of the lens module 8. The miniature air pump 19 blows air into the cooling coil 20. The air flows within the cooling coil 20, carrying away heat from the chip encapsulation area inside the thermometer body 1. The air then enters the air guide groove 22 inside the protective frame 9 through the air guide pipe 21, and finally exits from several air nozzles 23. The air nozzles 23 are narrow slits inclined at 45° and distributed at equal angles to the central axis of the lens module 8. The blown air forms an air curtain barrier on the outside of the lens module 8, directly blocking dust and smoke from approaching the lens, thus reducing lens contamination at its source.

[0044] When dust and impurities adhere to the outer surface of the lens module 8, the cleaning procedure is initiated. The miniature drive motor 14, located within the mounting frame and ceramic-encapsulated to ensure high-temperature resistance, drives the drive gear 13. The drive gear 13 meshes with the annular toothed groove 12 on the outer circumference of the rotating frame 11, causing the rotating frame 11 to rotate synchronously within the annular groove 10 inside the protective frame 9. Simultaneously, the miniature servo cylinder 17 inside the fixing block 15 drives the telescopic block 16 to fully extend, causing the cleaning scraper 18 on one side of the fixing block 15 and the telescopic block 16 to contact the outer surface of the lens module 8. During the rotation of the rotating frame 11, the cleaning scraper 18 slides against the surface of the lens module 8, scraping away dust and impurities. The cleaning scraper 18 is made of polytetrafluoroethylene (PTFE) to prevent scratching the lens.

[0045] During operation, the internal components, such as the chip, generate heat. To ensure stable operation, effective heat dissipation is necessary. A miniature air pump 19 blows air into the cooling coil 20. As the air flows within the cooling coil 20, and because one side of the cooling coil 20 is attached to the chip package inside the temperature measuring instrument body 1, the airflow carries away the heat generated by the chip. The hot air then passes through the air guide pipe 21 and the air guide groove 22, finally exiting from the air outlet 23. This process not only provides air curtain protection for the lens module 8 but also dissipates heat from within the device, ensuring that the internal components operate at a suitable temperature.

[0046] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An infrared imaging furnace temperature detection device, characterized in that, The thermometer includes a main body (1), a display panel (2), and a microphone array module (3). The display panel (2) is rotatably mounted on the top of the main body (1) via a hinge, and the microphone array module (3) is fixedly mounted on the front of the display panel (2). Two connecting blocks (5) are fixedly mounted on the left side of the main body (1), and a handheld part (4) is fixedly mounted on the side of the two connecting blocks (5) near the main body (1). An elastic strap (6) is also fixedly mounted on the other side of the two connecting blocks (5). A lens connector (7) is fixedly installed on the front of the thermometer body (1), and a lens module (8) is connected to the front of the lens connector (7) by a thread. A protective frame (9) is fixedly installed on the front of the thermometer body (1) and outside the lens module (8). An annular groove (10) is provided on the front side inside the protective frame (9), and a rotating frame (11) is rotatably installed inside the annular groove (10). A fixing block (15) is fixedly installed on one side of the inner wall of the rotating frame (11), and a miniature servo electric cylinder (17) is fixedly installed on one side inside the fixing block (15). The other side of the interior of the protective frame (9) is provided with a telescopic block (16), and the driving end of the micro servo cylinder (17) is fixedly connected to one side of the telescopic block (16); a cleaning scraper (18) is fixedly provided on one side of both the fixed block (15) and the telescopic block (16); a micro drive motor (14) is fixedly provided on the outer periphery of the protective frame (9) through the mounting frame, and a drive gear (13) is fixedly provided on one end of the output shaft of the micro drive motor (14); an annular tooth groove (12) is provided on the outer periphery of the rotating frame (11), and the tooth surface of the drive gear (13) meshes with the tooth surface of the annular tooth groove (12) for transmission.

2. The infrared imaging furnace temperature detection device according to claim 1, characterized in that, The protective frame (9) is designed with a closed upper half and an open lower half.

3. The infrared imaging furnace temperature detection device according to claim 1, characterized in that, One side of each of the two cleaning scrapers (18) is in contact with the outer surface of the lens module (8).

4. The infrared imaging furnace temperature detection device according to claim 1, characterized in that, The protective frame (9) has several air vents (23) on its front side, and the air vents (23) are arranged at equal angles with respect to the central axis of the lens module (8). The air vents (23) are all arranged in a narrow slit at an angle of 45° to the central axis of the lens module (8).

5. The infrared imaging furnace temperature detection device according to claim 4, characterized in that, A miniature air pump (19) is provided on one side of the back of the thermometer body (1), and the air outlet of the miniature air pump (19) is connected to a cooling coil (20). One side of the cooling coil (20) is attached to the chip encapsulation inside the thermometer body (1), and the other end of the cooling coil (20) is connected to a duct (21).

6. The infrared imaging furnace temperature detection device according to claim 5, wherein One end of the air guide tube (21) passes through the interior of the thermometer body (1) and connects with the interior of the protective frame (9). The interior of the protective frame (9) is provided with an air guide groove (22), and the interior of the air guide groove (22) is connected with the interior of several air outlets (23).

Images