A switchable cryogenically-cooled large-area source electrically heated blackbody radiation source

Abstract

The application relates to the technical field of blackbody radiation sources, in particular to a large-area source electric heating blackbody radiation source capable of switching low-temperature modes, which comprises a box frame, the outer walls of the box frame are provided with sealing plates on both sides, the inner walls of the two sealing plates are provided with partition frames, one side of the outer walls of the two sealing plates is provided with circulating structures, the circulating structures comprise circulating water tanks fixed to one side of the outer walls of the sealing plates, the top ends of the two circulating water tanks are fixedly connected with heat dissipation boxes, the inner walls of the two heat dissipation boxes are provided with a plurality of heat dissipation pipes, the top ends of the plurality of heat dissipation pipes penetrate through hot water transmission boxes, the bottom ends of the plurality of heat dissipation pipes penetrate through the top ends of the circulating water tanks, and the outer walls of the heat dissipation boxes are provided with a plurality of heat dissipation fans. The large-area source electric heating blackbody radiation source capable of switching low-temperature modes has the advantages that the low-temperature mode can be switched, the radiation temperature of the large-area source is ensured to be consistent, and the temperature stable period is short.

Description

Technical Field

[0001] This invention relates to the field of blackbody radiation source technology, specifically to a large-area electric heating blackbody radiation source with switchable low-temperature modes. Background Technology

[0002] A blackbody calibration source (also known as a blackbody radiation source) is a device that simulates the characteristics of a blackbody. It generates stable and known-temperature infrared radiation by raising the temperature to 3000 degrees Celsius. It is used to calibrate and verify the temperature scale of various infrared measuring devices. Blackbody radiation sources utilize the thermal radiation characteristics of objects and achieve radiation within a specific wavelength range by controlling the temperature of the object. However, it is difficult to maintain the radiation generated in the low-temperature range within the set range, especially the temperature stability in the low-temperature mode is insufficient.

[0003] In the prior art, patent document CN110031106A discloses a blackbody radiation source, which relates to a blackbody radiation source including a blackbody radiation cavity having an inner surface. The inner surface of the blackbody radiation cavity is provided with a carbon nanotube structure, the carbon nanotube structure comprising: a first carbon nanotube layer, the first carbon nanotube layer being attached to the inner surface of the blackbody radiation cavity, the first carbon nanotube layer including a plurality of first carbon nanotubes, the extension direction of the plurality of first carbon nanotubes being substantially parallel to the surface of the first carbon nanotube layer; a second carbon nanotube layer, the second carbon nanotube layer including a plurality of second carbon nanotubes, the extension direction of the plurality of second carbon nanotubes being substantially perpendicular to the surface of the first carbon nanotube layer, and one end of the plurality of second carbon nanotubes being in contact with the first carbon nanotube layer; and a plurality of third carbon nanotubes, the plurality of third carbon nanotubes being wound between the first carbon nanotubes and the second carbon nanotubes.

[0004] However, the above-mentioned solutions are based on single high-temperature heating and lack a targeted low-temperature control structure, which cannot be adapted to scenarios requiring low-temperature radiation and has a limited scope of application. Furthermore, the heating uniformity is poor, and local temperature deviations are prone to occur during the large-area source heating process, resulting in uneven radiation output and affecting the accuracy of detection and calibration. Moreover, the heat dissipation efficiency is insufficient. When switching to the low-temperature mode, the heat cannot be dissipated quickly, resulting in slow low-temperature mode startup and long temperature stabilization period. Based on this, the present invention provides a large-area source electrically heated blackbody radiation source with switchable low-temperature mode to solve the problems mentioned in the background art. Summary of the Invention

[0005] This invention addresses the technical problems existing in the prior art by providing a large-area electric heating blackbody radiation source with switchable low-temperature modes. It has the advantages of enabling low-temperature mode switching, ensuring consistent large-area radiation temperature, and having a short temperature stabilization period.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A large surface source electric heating blackbody radiation source with switchable low temperature mode includes a frame, both sides of the outer wall of the frame are equipped with sealing plates, the inner walls of the two sealing plates are equipped with partitions, and one side of the outer wall of the two sealing plates is provided with a circulation structure. The circulation structure includes a circulating water tank fixed to one side of the outer wall of the sealing plate, a heat dissipation box is fixedly connected to the top of the two circulating water tanks, multiple heat dissipation pipes are installed on the inner walls of the two heat dissipation boxes, the tops of the multiple heat dissipation pipes pass through a hot water transmission box, and the bottoms of the multiple heat dissipation pipes pass through the top of the circulating water tanks. Multiple cooling fans are installed on one side of the outer wall of the heat dissipation box.

[0007] The inner walls of the two partitions are provided with a low-temperature structure. The low-temperature structure includes multiple heating chambers installed between the partitions. Multiple heat-conducting blocks are installed at equal intervals around the outer walls of the multiple heating chambers. Multiple heat dissipation coils are installed on the outer walls of the multiple heat-conducting blocks. Multiple heat-conducting terminals are fixedly connected to the outer walls of the multiple heat dissipation coils, and a horizontal pipe runs through the multiple heat dissipation coils.

[0008] The beneficial effects of adopting the above-mentioned further solution are as follows: the circulating water tank is fixed to one side of the outer wall of the sealing plate, stores the cooling medium, and provides the medium supply for circulating heat dissipation; the heat dissipation box is fixedly connected to the top of the two circulating water tanks, installs heat dissipation pipes and cooling fans, and provides space for heat dissipation; multiple cooling fans are installed on one side of the outer wall of the heat dissipation box to accelerate the airflow inside the heat dissipation box, improve the heat dissipation efficiency of the heat dissipation pipes, and accelerate the cooling of the cooling medium; multiple heat dissipation pipes are installed on the inner walls of the two heat dissipation boxes to transfer the cooling medium after absorbing heat, and the heat is dissipated by the air blowing of the cooling fans; multiple heating chambers are installed between the two partitions, serving as the core component of electric heating, generating heat and achieving large-area source radiation; and the heat-conducting block... Equally spaced installations around the outer walls of multiple heating chambers rapidly transfer heat generated in the chambers to the heat dissipation coils, ensuring uniform heat distribution and improving the uniformity of large-area heating. Multiple heat dissipation coils are installed on the outer walls of multiple heat-conducting blocks. In heating mode, they assist in heat conduction; in low-temperature mode, they rapidly remove heat from the heating chambers through the flow of internal cooling media, achieving low-temperature control. Multiple heat-conducting terminals are fixedly connected to the outer walls of the heat dissipation coils, enhancing their thermal conductivity and ensuring rapid heat transfer. Horizontal pipes run through the heat dissipation coils, connecting them and achieving uniform distribution of the cooling media, ensuring even heat dissipation and improving temperature stability in low-temperature mode.

[0009] The beneficial effects of this invention are:

[0010] 1) This invention enables flexible and rapid switching between heating and low-temperature modes. Through the coordinated operation of the heat dissipation coil and circulation structure in the low-temperature structure, combined with the efficient heat conduction of the heat-conducting block, the temperature of the radiation source can be precisely controlled to the low-temperature range according to actual usage needs, while retaining the original high-temperature heating function. This device can be perfectly adapted to various working conditions and usage scenarios, greatly expanding the applicability of the equipment. There is no need to equip separate devices for different temperature scenarios, reducing the user's equipment investment cost and improving the versatility and practicality of the equipment.

[0011] 2) This invention utilizes a two-to-two opposing arrangement of multiple heating chambers, combined with the auxiliary heating plate, to achieve uniform heat diffusion. Heating wires are evenly embedded within the inner wall of the auxiliary heating plate, precisely corresponding to the heating terminals, ensuring uniform power supply and stable heating. High thermal conductivity heat-conducting blocks are evenly distributed around the outer wall of the heating chamber, rapidly transferring heat generated within the chamber to the entire radiant surface, preventing localized overheating or underheating. Simultaneously, the combination of the heating coil and the graphite cavity further enhances heat transfer efficiency, reduces heat loss, and ensures that the overall temperature fluctuation of the heating chamber is controlled within a low range, resulting in uniform and stable radiation output intensity.

[0012] 3) This invention significantly improves heat dissipation efficiency by using a circulating water tank, heat dissipation pipes, and a cooling fan, in conjunction with the auxiliary heat dissipation of the heat dissipation pipes and heat sinks. The heat sinks are fixed at equal intervals to the outer wall of the heat dissipation pipes, divided into two groups corresponding to both sides of the low-temperature structure, allowing for targeted absorption of heat from the low-temperature structure and increasing the heat dissipation area. The cooling fan adjusts its speed to accelerate airflow inside the heat dissipation tank, quickly removing heat from the cooling medium inside the heat dissipation pipes. After cooling, the cooling medium flows back to the circulating water tank, achieving a closed-loop circulation and further improving the continuity and efficiency of heat dissipation. Simultaneously, the top-mounted fan radiator assists in overall equipment heat dissipation, accelerating the removal of heat from inside the equipment.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, the inner walls of the plurality of heating chambers are provided with cavities, and coil fixing frames are fixedly connected to the inner walls of the cavities. Heating coils are embedded between the plurality of coil fixing frames, and graphite cavities are installed inside the plurality of heating coils.

[0015] Furthermore, the plurality of heating chambers are opposite each other in pairs, and auxiliary heating plates are fixedly connected between the plurality of heating chambers, and the plurality of auxiliary heating plates are fixedly connected to each other by a mounting bracket.

[0016] Furthermore, heating terminals are fixedly connected to both sides of the outer wall of the multiple auxiliary heating plates, and the multiple heating terminals correspond to the heating cavity.

[0017] Furthermore, heating wires are installed on the inner walls of the plurality of auxiliary heating plates, and each of the plurality of heating wires corresponds to a heating terminal.

[0018] The beneficial effects of adopting the above-mentioned further solution are as follows: A cavity is formed within the inner wall of multiple heating chambers, where heating coils and coil mounting brackets are installed; the coil mounting brackets are fixedly connected to the inner wall of the cavity, securing the heating coils and ensuring their stable installation, preventing loosening or displacement during long-term operation; the heating coils are embedded between multiple coil mounting brackets, generating heat after being energized to provide heating power for the heating chambers, achieving large-area electric heating; a graphite cavity is installed inside multiple heating coils, and being made of graphite material, it enhances heat conduction efficiency, ensuring that the heat generated by the heating coils is quickly conducted to the heating chambers, while also providing high-temperature resistance and protection, extending the service life of the heating coils; and an auxiliary heating plate is fixedly connected to multiple... Between the heating chambers, and with multiple heating chambers facing each other in pairs, auxiliary heating is provided to enhance the heat uniformity of the heating chambers and ensure a consistent large-area source radiation temperature. The mounting bracket is fixedly connected between multiple auxiliary heating plates to secure the auxiliary heating plates and ensure a stable connection between the auxiliary heating plates and the heating chambers, while also enhancing the overall structural stability of the low-temperature structure. Heating terminals are fixedly connected to both sides of the outer walls of multiple auxiliary heating plates, and each heating terminal corresponds to a heating chamber, connecting to the power supply and heating wires to provide electrical energy to the heating wires. The heating wires are installed on the inner walls of multiple auxiliary heating plates, and each heating wire corresponds to a heating terminal. After being energized, they generate heat to assist the auxiliary heating plates in heating, further enhancing heating uniformity and ensuring a stable large-area source radiation temperature.

[0019] Furthermore, a transmission pipe is fixedly connected to one side of the outer wall of the hot water transmission box, a fixing joint is fixedly connected to the outer wall of the transmission pipe, and a sealing plate penetrates the outer wall of both transmission pipes. A heat dissipation water pipe is fixedly connected to the end of the two transmission pipes away from the hot water transmission box.

[0020] Furthermore, heat sinks are fixedly connected to the outer wall of the heat dissipation pipe at equal intervals, and two fixing rods are installed at the top of the heat sinks. The heat sinks are divided into two groups, and each group of heat sinks is located on one side of the low-temperature structure.

[0021] The beneficial effects of adopting the above-mentioned further solution are as follows: the transmission pipe is fixedly connected to one side of the outer wall of the hot water transmission tank, transferring the heat generated by the low-temperature structure to the hot water transmission tank, and then dissipating the heat through the heat dissipation pipe; the fixing joint is fixedly connected to the outer wall of the transmission pipe, fixing the transmission pipe and ensuring that the transmission pipe is installed firmly, avoiding loosening or displacement during long-term operation; both transmission pipes have sealing plates penetrating their outer walls, connecting the transmission pipes to the internal components of the equipment; the heat dissipation water pipe is fixedly connected to the end of the two transmission pipes away from the hot water transmission tank, connecting the transmission pipes to the low-temperature structure, and transferring the heat generated by the low-temperature structure; the heat dissipation fins are fixedly connected to the outer wall of the heat dissipation water pipe at equal intervals, increasing the heat dissipation area of ​​the heat dissipation water pipe, accelerating heat dissipation, and assisting in the switching of the low-temperature mode; two fixing rods are installed on the top of multiple heat dissipation fins, fixing the heat dissipation fins and ensuring that the heat dissipation fins are installed firmly; the multiple heat dissipation fins are divided into two groups, each group of heat dissipation fins is located on one side of the low-temperature structure, specifically absorbing the heat of the low-temperature structure, improving heat dissipation efficiency, and helping the low-temperature mode to start quickly.

[0022] Furthermore, a control board is mounted on the front end face of the frame, and a controller is embedded in the rear end face of the control board.

[0023] Furthermore, a battery box is fixedly connected to the bottom end of the bottom mounting bracket, a power controller is fixedly connected to the front end of the battery box, a temperature detector is fixedly connected to the bottom end of the battery box, and a blackbody radiation generator is electrically connected to the top end of the battery box.

[0024] Furthermore, a top fan radiator is installed at the top of the frame, an inner partition is installed on the inner wall of the frame, and a bottom mounting bracket is installed at the bottom of the inner partition.

[0025] The beneficial effects of adopting the above-mentioned further solutions are as follows: the frame is a rigid frame structure made of high-strength alloy material; the sealing plates are installed on both sides of the outer wall of the frame, sealing both sides of the frame and providing protection and heat insulation, preventing damage to the internal components of the equipment from external dust and debris, while also reducing heat loss; the partitions are installed on the inner walls of the two sealing plates, fixing the low-temperature structure and ensuring its stable installation, while also serving as partitions and supports, optimizing the internal space layout of the equipment; the top fan radiator is installed on the top of the frame, assisting in the overall heat dissipation of the equipment, especially when switching to low-temperature mode, accelerating the dissipation of internal heat and improving the start-up efficiency of low-temperature mode; the inner partitions are installed on the inner walls of the frame, separating the internal space of the frame and avoiding... To prevent mutual interference, the bottom mounting bracket is installed at the bottom of the inner partition to secure the battery box and other components, ensuring their stability. The control board is installed at the front of the frame, allowing operators to input control commands and adjust the equipment's operating mode. The battery box is fixedly connected to the bottom of the mounting bracket, and the power controller is fixedly connected to the front of the battery box to control power supply and voltage regulation, ensuring a stable power supply to all components and preventing voltage fluctuations from damaging them. The temperature detector is fixedly connected to the bottom of the battery box to monitor the internal temperature of the equipment in real time, feeding the temperature data back to the controller to provide data support for temperature control and ensure stable operation of the equipment within the set temperature range. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the present invention from another angle;

[0029] Figure 4 This is a schematic diagram of the control board connection structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the low-temperature structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the heating cavity connection structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the auxiliary heating plate connection structure of the present invention;

[0033] Figure 8 This is a schematic diagram of the circulating water tank structure of the present invention.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Frame; 11. Control board; 12. Top fan radiator; 13. Controller; 14. Bottom mounting bracket; 15. Power controller; 16. Battery box; 17. Temperature detector; 18. Inner partition; 19. Partition; 110. Sealing plate; 111. Blackbody radiation generator; 2. Circulation structure; 21. Circulating water tank; 22. Heat dissipation box; 23. Cooling fan; 24. Heat dissipation pipe; 25. Hot water transfer box; 26. Transfer pipe; 27. Fixing section; 28. Heat sink; 29. ​​Heat dissipation water pipe; 210. Fixing rod; 3. Low temperature structure; 31. Heating cavity; 32. Heat-conducting block; 33. Heat dissipation coil; 34. Horizontal tube; 35. Heat-conducting terminal; 36. Graphite cavity; 37. Coil fixing bracket; 38. Heating coil; 39. Cavity; 310. Auxiliary heating plate; 311. Mounting bracket; 312. Heating wire; 313. Heating terminal. Detailed Implementation

[0036] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0037] The present invention provides the following preferred embodiments.

[0038] like Figure 1-8 As shown, a large surface-source electrically heated blackbody radiation source with switchable low-temperature mode includes a frame 1. Both sides of the outer wall of the frame 1 are equipped with sealing plates 110. The inner walls of the two sealing plates 110 are equipped with partitions 19. A circulation structure 2 is provided on one side of the outer wall of the two sealing plates 110. The circulation structure 2 includes a circulating water tank 21 fixed to one side of the outer wall of the sealing plate 110. A heat dissipation box 22 is fixedly connected to the top of the two circulating water tanks 21. Multiple heat dissipation pipes 24 are installed on the inner wall of the two heat dissipation boxes 22. The top of the multiple heat dissipation pipes 24 passes through a hot water transmission box 25. The bottom of the multiple heat dissipation pipes 24 passes through the top of the circulating water tank 21. Multiple cooling fans 23 are installed on one side of the outer wall of the heat dissipation box 22.

[0039] The inner walls of the two partitions 19 are provided with a low-temperature structure 3. The low-temperature structure 3 includes multiple heating chambers 31 installed between the partitions 19. Multiple heat-conducting blocks 32 are installed at equal intervals around the outer walls of the multiple heating chambers 31. Multiple heat dissipation coils 33 are installed on the outer walls of the multiple heat-conducting blocks 32. Multiple heat-conducting terminals 35 are fixedly connected to the outer walls of the multiple heat dissipation coils 33, and horizontal pipes 34 pass through the multiple heat dissipation coils 33. The circulating water tank 21 is fixed to one side of the outer wall of the sealing plate 110 and stores the cooling medium to provide the medium supply for circulating heat dissipation. The heat dissipation box 22 is fixedly connected to the top of the two circulating water tanks 21 and installs heat dissipation pipes 24 and cooling fans 23 to provide space for heat dissipation. Multiple cooling fans 23 are installed on one side of the outer wall of the heat dissipation box 22 to accelerate the air flow inside the heat dissipation box 22, improve the heat dissipation efficiency of the heat dissipation pipes 24, and accelerate the cooling of the cooling medium. Multiple heat dissipation pipes 24 are installed on the inner walls of the two heat dissipation boxes 22 to transfer the cooling medium after absorbing heat through the cooling fans 23. The airflow dissipates heat. Multiple heating chambers 31 are installed between two partitions 19, serving as the core component of the electric heating system, generating heat and achieving large-area radiation. Heat-conducting blocks 32 are evenly spaced around the outer walls of the multiple heating chambers 31, rapidly transferring the heat generated by the heating chambers 31 to the heat dissipation coils 33, ensuring uniform heat distribution and improving the uniformity of the large-area heating. Multiple heat dissipation coils 33 are installed on the outer walls of the multiple heat-conducting blocks 32, assisting in heat conduction in heating mode and rapidly removing heat from the heating chambers 31 through the flow of internal cooling medium in low-temperature mode, achieving low-temperature control. Multiple heat-conducting terminals 35 are fixedly connected to the outer walls of the multiple heat dissipation coils 33, enhancing their thermal conductivity and ensuring rapid heat transfer. A horizontal pipe 34 runs through the multiple heat dissipation coils 33, connecting them and achieving uniform distribution of the cooling medium, ensuring uniform heat dissipation from the multiple heat dissipation coils and improving temperature stability in low-temperature mode.

[0040] The inner walls of multiple heating chambers 31 are provided with cavities 39, and coil fixing frames 37 are fixedly connected to the inner walls of the cavities 39. Heating coils 38 are embedded between the multiple coil fixing frames 37, and graphite cavities 36 are installed inside the multiple heating coils 38.

[0041] Multiple heating chambers 31 are arranged in pairs facing each other, and auxiliary heating plates 310 are fixedly connected between the multiple heating chambers 31. The multiple auxiliary heating plates 310 are fixedly connected to each other by mounting brackets 311.

[0042] Heating terminals 313 are fixedly connected to both sides of the outer wall of multiple auxiliary heating plates 310, and the multiple heating terminals 313 correspond to the heating cavity 31.

[0043] Heating wires 312 are installed on the inner walls of multiple auxiliary heating plates 310, and each heating wire 312 corresponds to a heating terminal 313.

[0044] A cavity 39 is formed within the inner wall of multiple heating chambers 31, housing heating coils 38 and coil mounting brackets 37. The coil mounting brackets 37 are fixedly connected to the inner wall of the cavity 39, securing the heating coils 38 and ensuring their stable installation to prevent loosening or displacement during long-term operation. The heating coils 38 are embedded between the multiple coil mounting brackets 37, generating heat when energized to provide heating power to the heating chambers 31, achieving large-area electric heating. A graphite cavity 36 is installed inside the multiple heating coils 38, made of graphite material, enhancing heat conduction efficiency and ensuring rapid heat transfer from the heating coils 38 to the heating chambers 31. It also provides high-temperature resistance and protection, extending the service life of the heating coils 38. An auxiliary heating plate 310 is fixedly connected between the multiple heating chambers 31, and the multiple heating chambers 31... The two auxiliary heating plates 310 are connected to each other to enhance the heat uniformity of the heating cavity 31 and ensure a consistent large surface source radiation temperature. The mounting bracket 311 is fixedly connected between the multiple auxiliary heating plates 310 to fix the auxiliary heating plates 310 and ensure a stable connection between the auxiliary heating plates 310 and the heating cavity 31. At the same time, it enhances the overall structural stability of the low temperature structure 3. The heating terminals 313 are fixedly connected to both sides of the outer wall of the multiple auxiliary heating plates 310, and the multiple heating terminals 313 correspond to each other in the heating cavity 31. They are connected to the power supply and the heating wires 312 to provide power to the heating wires 312. The heating wires 312 are installed on the inner wall of the multiple auxiliary heating plates 310, and the multiple heating wires 312 correspond to the heating terminals 313. After being energized, they generate heat to assist the auxiliary heating plates 310 in heating, further enhance the heating uniformity, and ensure a stable large surface source radiation temperature.

[0045] A transmission pipe 26 is fixedly connected to one side of the outer wall of the hot water transmission box 25. A fixing joint 27 is fixedly connected to the outer wall of the transmission pipe 26. A sealing plate 110 passes through the outer wall of both transmission pipes 26. A heat dissipation water pipe 29 is fixedly connected to the end of the two transmission pipes 26 away from the hot water transmission box 25.

[0046] Heat sinks 28 are fixedly connected to the outer wall of the heat dissipation pipe 29 at equal intervals, and two fixing rods 210 are installed at the top of the multiple heat sinks 28. The multiple heat sinks 28 are divided into two groups, and each group of heat sinks 28 is located on one side of the low temperature structure 3.

[0047] The transmission pipe 26 is fixedly connected to one side of the outer wall of the hot water transmission tank 25, transferring the heat generated by the low-temperature structure 3 to the hot water transmission tank 25, and then dissipating it through the heat dissipation pipe 24; the fixing joint 27 is fixedly connected to the outer wall of the transmission pipe 26, fixing the transmission pipe 26 and ensuring that the transmission pipe 26 is installed firmly to avoid loosening or displacement during long-term operation; the outer walls of both transmission pipes 26 are penetrated by sealing plates 110, connecting the transmission pipes 26 to the internal components of the equipment; the heat dissipation water pipe 29 is fixedly connected to the end of the two transmission pipes 26 away from the hot water transmission tank 25, connecting... The transmission pipe 26 connects to the low-temperature structure 3 to transfer the heat generated by the low-temperature structure 3; the heat sink 28 is fixedly connected to the outer wall of the heat dissipation pipe 29 at equal intervals to increase the heat dissipation area of ​​the heat dissipation pipe 29, accelerate heat dissipation, and assist in switching to the low-temperature mode; two fixing rods 210 are installed on the top of the multiple heat sinks 28 to fix the heat sinks 28 and ensure that the heat sinks 28 are installed firmly; the multiple heat sinks 28 are divided into two groups, and each group of heat sinks 28 is located on one side of the low-temperature structure 3 to specifically absorb the heat of the low-temperature structure 3, improve heat dissipation efficiency, and help the low-temperature mode start up quickly.

[0048] A control board 11 is mounted on the front end of the frame 1, and a controller 13 is embedded on the rear end of the control board 11.

[0049] A battery box 16 is fixedly connected to the bottom end of the bottom mounting bracket 14. A power controller 15 is fixedly connected to the front end of the battery box 16. A temperature detector 17 is fixedly connected to the bottom end of the battery box 16. A blackbody radiation generator 111 is electrically connected to the top end of the battery box 16.

[0050] Furthermore, a top fan radiator 12 is installed at the top of the frame 1, an inner partition 18 is installed on the inner wall of the frame 1, and a bottom mounting bracket 14 is installed at the bottom of the inner partition 18.

[0051] The frame 1 is a rigid frame structure made of high-strength alloy material. Sealing plates 110 are installed on both sides of the outer wall of the frame 1, sealing both sides and providing protection and insulation to prevent damage to internal components from external dust and debris, while also reducing heat loss. Partitions 19 are installed on the inner walls of the two sealing plates 110, fixing the low-temperature structure 3 and ensuring its stability. They also serve as partitions and supports, optimizing the internal space layout. A top-mounted fan radiator 12 is installed at the top of the frame 1 to assist in overall heat dissipation, especially when switching to low-temperature mode, accelerating heat dissipation and improving low-temperature mode startup efficiency. Inner partitions 18 are installed on the inner wall of the frame 1, separating the internal space to prevent mutual interference and also serving as partitions. The bottom mounting bracket 14 is installed at the bottom of the inner partition 18 to install and fix components such as the battery box 16, ensuring that the relevant components are installed firmly. The control board 11 is installed on the front side of the frame 1, allowing the operator to input control commands and adjust the equipment's working mode. The battery box 16 is fixedly connected to the bottom of the bottom mounting bracket 14, and the power controller 15 is fixedly connected to the front side of the battery box 16 to control the power supply and voltage regulation, ensuring that the equipment components receive a stable power supply and avoiding damage to the components due to voltage fluctuations. The temperature detector 17 is fixedly connected to the bottom of the battery box 16 to monitor the internal temperature of the equipment in real time and feed the temperature data back to the controller 13 in real time, providing data support for temperature regulation and ensuring that the equipment operates stably within the set temperature range.

[0052] The working principle of this invention is as follows: Power is supplied by the battery box 16, the power controller 15 adjusts the supply voltage, and the controller 13 receives the operation command from the control board 11 to control the heating coil 38 and heating wire 312 to start, generating heat which is conducted to the heating cavity 31 through the heat-conducting block 32 and the auxiliary heating plate 310, realizing large-area electric heating. Radiation is generated by the blackbody radiation generator 111. The target heating temperature is set by the control board 11. After receiving the command, the controller 13 controls the heating terminal 313 to be energized, starting the heating coil 38 and heating wire 312. The heating coil 38 generates heat after being energized, which is conducted to the heating cavity 31 through the graphite cavity 36. The heat generated by the heating wire 312 is conducted to the heating cavity 31 through the auxiliary heating plate 310. The heat-conducting block 32 ensures uniform heat distribution, realizing uniform heating of the large-area source, making the radiation dispersion more uniform. The temperature detector 17 feeds back the temperature data to the controller 13 in real time. When the temperature approaches the set target, the controller 13 automatically reduces the heating power. The system maintains a stable temperature. If the temperature is too high, the controller 13 starts the cooling fan 23 of the circulation structure 2 for auxiliary heat dissipation, ensuring that temperature fluctuations are controlled within the allowable range. If the equipment is in heating mode, the heating mode is first turned off by the control board 11, and the heating coil 38 and heating wire 312 are turned off. After the equipment temperature initially drops, the low-temperature mode is switched. The cooling medium in the circulating water tank 21 enters the hot water transfer tank 25 through the heat dissipation pipe 24, and is then transported to the heat dissipation water pipe 29 through the transfer pipe 26. The heat sink 28 absorbs the heat from the low-temperature structure 3, and the cooling fan 23 accelerates the airflow to dissipate the heat from the heat sink 28 and the heat dissipation pipe 24. After absorbing the heat, the cooling medium flows back to the circulating water tank 21 through the heat dissipation pipe 24, forming a closed loop. The heat dissipation coil 33 absorbs the heat from the heating chamber 31 through the heat-conducting block 32, and the cooling medium is evenly distributed through the horizontal pipe 34, further improving the cooling efficiency and generating stable low-temperature radiation. It starts up quickly and has a short temperature stabilization cycle.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large surface-source electrically heated blackbody radiation source with switchable low-temperature mode, characterized in that, The system includes a frame (1), with sealing plates (110) installed on both sides of the outer wall of the frame (1), and partitions (19) installed on the inner walls of the two sealing plates (110). A circulation structure (2) is provided on one side of the outer wall of the two sealing plates (110). The circulation structure (2) includes a circulating water tank (21) fixed to one side of the outer wall of the sealing plate (110). A heat sink (22) is fixedly connected to the top of the two circulating water tanks (21). Multiple heat sinks (24) are installed on the inner walls of the two heat sinks (22). A hot water transfer tank (25) passes through the top of the multiple heat sinks (24). The bottom of the multiple heat sinks (24) passes through the top of the circulating water tank (21). Multiple cooling fans (23) are installed on one side of the outer wall of the heat sink (22). The inner walls of the two partitions (19) are provided with a low-temperature structure (3). The low-temperature structure (3) includes multiple heating chambers (31) installed between the partitions (19). Multiple heat-conducting blocks (32) are installed at equal intervals around the outer walls of the multiple heating chambers (31). Multiple heat-conducting coils (33) are installed on the outer walls of the multiple heat-conducting blocks (32). Multiple heat-conducting terminals (35) are fixedly connected to the outer walls of the multiple heat-conducting coils (33). A horizontal pipe (34) passes through the multiple heat-conducting coils (33).

2. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, The inner walls of the multiple heating chambers (31) are provided with cavities (39), and coil fixing frames (37) are fixedly connected to the inner walls of the cavities (39). Heating coils (38) are embedded between the multiple coil fixing frames (37), and graphite cavities (36) are installed inside the multiple heating coils (38).

3. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, The multiple heating chambers (31) are opposite each other, and auxiliary heating plates (310) are fixedly connected between the multiple heating chambers (31). The multiple auxiliary heating plates (310) are fixedly connected to each other by mounting brackets (311).

4. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, Heating terminals (313) are fixedly connected to both sides of the outer wall of the multiple auxiliary heating plates (310), and the multiple heating terminals (313) correspond to the heating chamber (31).

5. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, Heating wires (312) are installed on the inner walls of the multiple auxiliary heating plates (310), and the multiple heating wires (312) correspond to the heating terminals (313).

6. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, A transmission pipe (26) is fixedly connected to one side of the outer wall of the hot water transmission box (25). A fixing joint (27) is fixedly connected to the outer wall of the transmission pipe (26). A sealing plate (110) passes through the outer wall of both transmission pipes (26). A heat dissipation water pipe (29) is fixedly connected to the end of the two transmission pipes (26) away from the hot water transmission box (25).

7. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, The outer wall of the heat dissipation pipe (29) is fixedly connected with heat dissipation fins (28) at equal intervals, and two fixing rods (210) are installed at the top of the multiple heat dissipation fins (28). The multiple heat dissipation fins (28) are divided into two groups, and each group of heat dissipation fins (28) is located on one side of the low temperature structure (3).

8. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, The front end of the frame (1) is equipped with a control board (11), and the rear end of the control board (11) is embedded with a controller (13).

9. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, The bottom end of the mounting bracket (14) is fixedly connected to a battery box (16), the front end of the battery box (16) is fixedly connected to a power controller (15), the bottom end of the battery box (16) is fixedly connected to a temperature detector (17), and the top end of the battery box (16) is electrically connected to a blackbody radiation generator (111).

10. A large-area electrically heated blackbody radiation source with switchable low-temperature mode according to claim 1, characterized in that, The top of the frame (1) is equipped with a top fan radiator (12), the inner wall of the frame (1) is equipped with an inner partition (18), and the bottom end of the inner partition (18) is equipped with a bottom mounting bracket (14).

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