Large-diameter annular low-temperature blackbody radiation source and preparation method thereof

Abstract

The invention provides a large-caliber annular low-temperature blackbody radiation source and a preparation method thereof.The annular low-temperature blackbody radiation source is formed by splicing four radiation source assemblies in a quarter ring shape, and any radiation source assembly comprises an outer side frame, an inner side frame, an outer heat insulation layer, an inner heat insulation layer, a radiation plate, a heating piece, a heat uniformizing plate and a refrigerator; the longitudinal sections of the outer side frame and the inner side frame in the radial direction are both in an L shape, and the outer side frame and the inner side frame are arranged in a # imgabs0 # mode. The longitudinal sections of the outer heat insulation layer and the inner heat insulation layer in the radial direction are both L-shaped, and the outer heat insulation layer and the inner heat insulation layer are stacked on the outer side frame and the inner side frame respectively; the radiant panel is in a quarter ring shape and located between the outer heat insulation layer and the inner heat insulation layer, and the heating piece, the heat uniformizing plate and the refrigerator are sequentially stacked on the radiant panel. The technical problem that in the prior art, a blackbody radiation source is likely to be blocked by infrared imaging equipment, and then infrared imaging calibration is affected can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of radiation calibration of infrared imaging systems, and in particular to a large-aperture annular low-temperature blackbody radiation source and a preparation method thereof. Background Art

[0002] Infrared imaging systems use infrared imaging technology to identify the infrared radiation of objects (temperature above absolute zero), and are mainly used in defense, military, scientific experiments, industry, agriculture and other related fields. As the stability and accuracy requirements of infrared imaging systems become higher and higher, accurate radiation calibration is required. The blackbody radiation source based on Planck's law can achieve the calibration and calibration of infrared imaging systems more accurately and quickly.

[0003] The infrared imaging equipment in the project uses a card-type optical system. During infrared calibration, the secondary mirror of the infrared imaging equipment blocks the black body. Considering factors such as black body weight reduction, thermal radiation and usage environment, it is necessary to invent a large-aperture annular low-temperature black body radiation source. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] According to one aspect of the present invention, a large-caliber annular low-temperature blackbody radiation source is provided, which is composed of four radiation source components in a quarter ring shape. Any radiation source component includes: an outer frame, an inner frame, an outer heat insulation layer, an inner heat insulation layer, a radiation plate, a heating plate, a uniform heat plate and a refrigerator. The outer frame is located on the outer side of the quarter ring, and the inner frame is located on the inner side of the quarter ring. The longitudinal sections of the outer frame and the inner frame along the radial direction are both L-shaped, and the outer frame and the inner frame are in a The outer insulation layer and the inner insulation layer are both L-shaped in radial longitudinal cross-section, and the outer insulation layer and the inner insulation layer are respectively stacked on the outer frame and the inner frame; the radiation plate is a quarter ring and is located between the outer insulation layer and the inner insulation layer, and the heating plate, the uniform heat plate and the refrigerator are stacked on the radiation plate in sequence.

[0006] Furthermore, the radiation source assembly also includes a plurality of connectors, and the outer frame, inner frame, outer insulation layer and inner insulation layer are fixed to the radiation plate through the connectors; the heating plate, uniform heat plate and refrigerator are fixed to the radiation plate through the connectors.

[0007] Furthermore, silicone rubber is applied between the radiation plate and the heating plate to achieve adhesion between the two.

[0008] Furthermore, the radiation plate can be made of graphite aluminum composite material.

[0009] Furthermore, the outer insulation layer and the inner insulation layer can be made of glass fiber reinforced plastics.

[0010] Furthermore, the outer frame and the inner frame can be made of aluminum alloy material.

[0011] Furthermore, the uniform heat plate can be made of non-metallic material with a temperature resistance of 150K to 450K.

[0012] Furthermore, the refrigerator can be made of aluminum alloy material.

[0013] Furthermore, the annular low-temperature blackbody radiation source also includes a main frame, and the four radiation source components are spliced ​​into a ring through the main frame and fixedly connected to the main frame.

[0014] According to another aspect of the present invention, a method for preparing a large-aperture annular low-temperature blackbody radiation source is provided. The method is used to prepare the large-aperture annular low-temperature blackbody radiation source as described above, and specifically comprises: for any radiation source component, the outer frame and the inner frame are arranged in a shape of a radiation plate. Placement; place the outer insulation layer on the outer frame, and place the inner insulation layer on the inner frame; lower the radiation plate from above the outer insulation layer and the inner insulation layer to contact the outer insulation layer and the inner insulation layer, and match the interfaces of the outer frame, the inner frame, the outer insulation layer and the inner insulation layer; fix the outer frame, the inner frame, the outer insulation layer, the inner insulation layer and the radiation plate; apply silicone rubber on the radiation plate, and stick the heating plate to the radiation plate; place the uniform heat plate on the heating plate, use a pressing block to flatten the uniform heat plate, and place it for a preset time; place the refrigerator on the uniform heat plate, and match it with the interface of the uniform heat plate; fix the radiation plate, the heating plate, the uniform heat plate and the refrigerator; repeat the above steps to complete the installation of the four radiation source assemblies; take the main frame as a reference, place the four radiation source assemblies on the main frame, and fix them to the main frame.

[0015] By applying the technical solution of the present invention, a large-caliber annular low-temperature blackbody radiation source and a preparation method thereof are provided. The annular low-temperature blackbody radiation source is composed of four quarter-ring-shaped radiation source components. Any radiation source component is provided with a radiation plate on the outer frame, the inner frame, the outer insulation layer, and the inner insulation layer, and a heating plate, a uniform heat plate, and a refrigerator are provided on the radiation plate. The blackbody radiation source of the present invention can work at low temperatures of 220K to 400K, and the effective radiation aperture is 0.75 to 1.5m. It can detect the infrared imaging system in a vacuum low-temperature environment in the laboratory, ensure that the performance indicators of the infrared imaging system meet the technical requirements, and then accurately identify the monitoring target. Compared with the prior art, the technical solution of the present invention can solve the technical problem that the blackbody radiation source in the prior art is easily blocked by the infrared imaging equipment, thereby affecting the calibration and calibration of the infrared imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A front view of a large-aperture annular low-temperature blackbody radiation source provided according to a specific embodiment of the present invention is shown;

[0018] Figure 2 A top view of a large-aperture annular low-temperature blackbody radiation source provided according to a specific embodiment of the present invention is shown;

[0019] Figure 3 A bottom view of a radiation source assembly provided according to a specific embodiment of the present invention is shown;

[0020] Figure 4 A side view of a radiation source assembly provided according to a specific embodiment of the present invention is shown;

[0021] Figure 5 A top view of a radiation source assembly provided according to a specific embodiment of the present invention is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10. Radiation source assembly; 1. Refrigerator; 2. External insulation layer; 3. Heating plate; 4. Heat uniformity plate; 5. Internal insulation layer; 6. External frame; 7. Radiation plate; 8. Internal frame; 20. Main frame. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0027] like Figures 1 to 5 As shown, according to a specific embodiment of the present invention, a large-aperture annular low-temperature blackbody radiation source is provided, and the annular low-temperature blackbody radiation source is composed of four quarter-ring-shaped radiation source components 10 spliced ​​together, and any radiation source component 10 includes:

[0028] An outer frame 6, an inner frame 8, an outer heat insulation layer 2, an inner heat insulation layer 5, a radiation plate 7, a heating plate 3, a heat uniforming plate 4 and a refrigerator 1,

[0029] The outer frame 6 is located outside the quarter ring, and the inner frame 8 is located inside the quarter ring. The longitudinal sections of the outer frame 6 and the inner frame 8 along the radial direction are both L-shaped, and the outer frame 6 and the inner frame 8 are set up;

[0030] The radial longitudinal sections of the outer heat insulation layer 2 and the inner heat insulation layer 5 are both L-shaped, and the outer heat insulation layer 2 and the inner heat insulation layer 5 are respectively stacked on the outer side frame 6 and the inner side frame 8;

[0031] The radiation plate 7 is in the shape of a quarter ring and is located between the outer insulation layer 2 and the inner insulation layer 5.

[0032] The heating plate 3 , the heat-dissipating plate 4 and the refrigerator 1 are sequentially stacked on the radiation plate 7 .

[0033] By applying this configuration, a large-caliber annular low-temperature blackbody radiation source is provided, which is composed of four quarter-ring-shaped radiation source components. Any radiation source component is provided with a radiation plate on the outer frame, the inner frame, the outer insulation layer, and the inner insulation layer, and a heating plate, a uniform heat plate, and a refrigerator are provided on the radiation plate. The blackbody radiation source of the present invention can work at low temperatures of 220K to 400K, and the effective radiation aperture is 0.75 to 1.5m. It can detect the infrared imaging system in a vacuum low-temperature environment in the laboratory, ensure that the performance indicators of the infrared imaging system meet the technical requirements, and then accurately identify the monitoring target.

[0034] Furthermore, in the present invention, in order to realize the connection and fixation of various components, the configurable radiation source assembly also includes a plurality of connectors, and the outer frame 6, the inner frame 8, the outer insulation layer 2 and the inner insulation layer 5 are fixed to the radiation plate 7 through the connectors; the heating plate 3, the uniform heat plate 4 and the refrigerator 1 are fixed to the radiation plate 7 through the connectors.

[0035] As a specific embodiment of the present invention, the connecting member may be an M10 screw. The above connecting member selection is only an example, but is not limited thereto.

[0036] Furthermore, in the present invention, silicone rubber may be applied between the radiation plate 7 and the heating plate 3 to achieve adhesion of the two.

[0037] As a specific embodiment of the present invention, the radiation plate can be made of graphite aluminum composite material, and its horizontal thermal conductivity is 600W / mk, and its longitudinal thermal conductivity is 20W / mk. Compared with common metal materials with good thermal conductivity such as copper and aluminum, graphite aluminum composite material has better uniform thermal performance. The large-caliber annular low-temperature blackbody radiation source developed using graphite aluminum composite material has smaller uniformity and can reach the industry-leading level.

[0038] The outer insulation layer 2 and the inner insulation layer 5 can be made of glass fiber reinforced plastics, which have low thermal conductivity, less heat transfer, and little effect on uniformity performance.

[0039] The outer frame 6 and the inner frame 8 can be made of aluminum alloy. Further, the outer frame 6 and the inner frame 8 can be subjected to aging treatment after processing.

[0040] Furthermore, in order to facilitate heating, the heating plate may be configured to include a substrate and a heating wire, wherein the heating wire is wrapped in the substrate.

[0041] As a specific embodiment of the present invention, the substrate material may be polyimide. The heating wire may be a multi-strand wire and is divided into 12 zones.

[0042] The uniform heat plate can be made of non-metallic material with a temperature resistance of 150k~450K. The uniform heat plate is installed between the heating plate and the refrigerator to reduce the heat conduction from the heating plate to the refrigerator. At the same time, it can enhance the insulation of the heating plate and increase the safety and reliability of the system.

[0043] The refrigerator can be made of aluminum alloy material, and aging treatment can be performed on the refrigerator after processing.

[0044] Furthermore, in the present invention, in order to facilitate the splicing of four radiation source assemblies, the annular low-temperature blackbody radiation source can be configured to also include a main frame 20, and the four radiation source assemblies 10 are spliced ​​into a ring through the main frame 20 and fixedly connected to the main frame 20.

[0045] As a specific embodiment of the present invention, the main frame 20 can be made of aluminum alloy material.

[0046] In addition, the main frame 20 can be processed in an integrated manner. Further, a mounting boss can be designed on the mounting end surface of the main frame 20 to improve the structural processing accuracy and reduce the surface roughness.

[0047] The large-aperture annular low-temperature blackbody radiation source of the present invention can simulate vacuum low-temperature conditions under laboratory conditions, calibrate the infrared imaging system, and improve the detection and recognition accuracy of the infrared imaging system.

[0048] According to another aspect of the present invention, a method for preparing a large-aperture annular low-temperature blackbody radiation source is provided. The method is used to prepare the large-aperture annular low-temperature blackbody radiation source as described above, and specifically comprises:

[0049] For any radiation source assembly, the outer frame 6 and the inner frame 8 are arranged in the shape of the radiation plate. place;

[0050] The outer heat insulation layer 2 is placed on the outer frame 6, and the inner heat insulation layer 5 is placed on the inner frame 8;

[0051] Lower the radiation panel 7 from above the outer insulation layer 2 and the inner insulation layer 5 until it contacts the outer insulation layer 2 and the inner insulation layer 5, and matches the interface of the outer frame 6, the inner frame 8, the outer insulation layer 2 and the inner insulation layer 5;

[0052] Fix the outer frame 6, the inner frame 8, the outer insulation layer 2, the inner insulation layer 5 and the radiation panel 7;

[0053] Apply silicone rubber on the radiation plate 7 and stick the heating sheet 3 to the radiation plate 7;

[0054] Place the uniform heating plate 4 on the heating plate 3, use a pressing block to flatten the uniform heating plate 4, and place it for a preset time;

[0055] Place the refrigerator 1 on the uniform heat plate 4 and match it with the interface of the uniform heat plate 4;

[0056] Fix the radiation plate 7, the heating plate 3, the uniform heat plate 4 and the refrigerator 1;

[0057] Complete the installation of any radiation source assembly;

[0058] Repeat the above steps to complete the installation of four radiation source assemblies;

[0059] Taking the main frame as a reference, four radiation source assemblies are placed on the main frame 20 and fixedly connected to the main frame 20 .

[0060] As a specific embodiment of the present invention, M10 screws can be used to pass through the inner and outer frames and the inner and outer insulation layers to be threadedly connected to the radiation board, and M10 screws can be used to pass through the main frame to be threadedly connected to the four radiation source assemblies.

[0061] After completing the preparation of the large-aperture annular low-temperature blackbody radiation source, install the radiation source subsystem on the transfer platform of the vacuum chamber, then push the transfer platform into the designated position in the vacuum chamber, slowly lift it up through the tooling, connect and fix it to the upper suspension of the chamber wall, and connect the radiation source subsystem to the aerial plug on the internal flange of the chamber wall; place the high-precision calibration subsystem in the central control room outside the vacuum chamber, and then connect it to the aerial plug on the external flange of the vacuum chamber wall through cables (one-to-one correspondence with the sequence of the aerial plug inside the chamber wall). After completing the above installation, place the infrared imaging system to be tested at the lower end of the radiation source subsystem, so that the window of the infrared imaging system to be tested faces the radiation surface of the radiation source subsystem, close the vacuum chamber, and evacuate. The vacuum degree reaches 1.0×10 -2 Pa through liquid nitrogen, vacuum degree reaches 1.0×10 -3 Pa is in calibration state. Before the calibration experiment, the large-aperture annular low-temperature blackbody radiation source has been calibrated by an infrared thermal imager, and its target irradiation time non-uniformity and target irradiation spatial non-uniformity meet the technical indicator requirements. In the calibration experiment, the large-aperture annular low-temperature blackbody radiation source sets the temperature according to the test outline. When the temperature stabilizes, the infrared imaging system identifies the infrared radiation of the large-aperture annular low-temperature blackbody radiation source and compares it with the infrared radiation temperature output by the high-precision calibration subsystem. According to the algorithm, the system adjusts its own parameters to improve the accuracy.

[0062] In order to have a further understanding of the present invention, the preparation method of the large-aperture annular low-temperature blackbody radiation source of the present invention is described in detail below.

[0063] Place the outer insulation layer 2 on the outer frame 6, and the inner insulation layer 5 on the inner frame 8, roughly arrange them according to the shape of the radiation board, hang the radiation board 7 to the upper end of the inner and outer frames, slowly lower it, adjust the position of the inner and outer frames, make the radiation board 7 match the inner and outer frames, and the interface of the inner and outer insulation layers, completely drop the radiation board 7, and use M10 screws to pass through the inner and outer frames and the inner and outer insulation layers to connect them with the radiation board by thread; take the radiation board 7 as the reference, evenly apply silicone rubber on the rear plane, and then stick the heating plate 3 to the designated area, and evenly smooth it. , place the uniform heat plate 4 on the upper end of the heating plate 3, and then use a pressing block to flatten the uniform heat plate 4, leave it for a day and a night, then lift the refrigerator 1 to the upper end of the uniform heat plate 4, slowly lower it, adjust the position of the uniform heat plate 4 to match the interface, completely drop the refrigerator 1, pass the M10 screws through the uniform heat plate 4 and the heating plate 3, and thread them with the radiation plate to complete the installation of the radiation source assembly; with the main frame as a reference, lift the four radiation source assemblies onto the main frame 20, and pass the M10 screws through the main frame 20 to thread them with the four radiation source assemblies.

[0064] In summary, the present invention provides a large-caliber annular low-temperature blackbody radiation source and a preparation method thereof, wherein the annular low-temperature blackbody radiation source is composed of four quarter-ring-shaped radiation source components, and any radiation source component is provided with a radiation plate on the outer frame, the inner frame, the outer insulation layer, and the inner insulation layer, and a heating plate, a uniform heat plate, and a refrigerator are provided on the radiation plate. The blackbody radiation source of the present invention realizes operation at low temperatures of 220K to 400K, and the effective radiation aperture is 0.75 to 1.5m. It can detect the infrared imaging system in a vacuum low-temperature environment in the laboratory, and ensure that the performance indicators of the infrared imaging system meet the technical requirements, thereby accurately identifying the monitoring target.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-aperture annular low-temperature blackbody radiation source, It is characterized in that The annular low-temperature blackbody radiation source is composed of four radiation source components (10) in the shape of a quarter ring, and any radiation source component (10) comprises: An outer frame (6), an inner frame (8), an outer heat insulation layer (2), an inner heat insulation layer (5), a radiation plate (7), a heating plate (3), a heat uniformity plate (4) and a refrigerator (1), The outer frame (6) is located on the outer side of the quarter ring, and the inner frame (8) is located on the inner side of the quarter ring. The longitudinal sections of the outer frame (6) and the inner frame (8) along the radial direction are both L-shaped, and the outer frame (6) and the inner frame (8) are set up; The outer heat insulation layer (2) and the inner heat insulation layer (5) are both L-shaped in longitudinal cross-section along the radial direction, and the outer heat insulation layer (2) and the inner heat insulation layer (5) are respectively stacked on the outer side frame (6) and the inner side frame (8); The radiation plate (7) is in the shape of a quarter ring and is located between the outer insulation layer (2) and the inner insulation layer (5). The heating plate (3), the heat-dissipating plate (4) and the refrigerator (1) are sequentially stacked on the radiation plate (7).

2. The large-aperture annular low-temperature blackbody radiation source according to claim 1, It is characterized in that The radiation source assembly (10) further comprises a plurality of connecting members, wherein the outer frame (6), the inner frame (8), the outer heat insulation layer (2) and the inner heat insulation layer (5) are fixed to the radiation plate (7) via the connecting members; and the heating plate (3), the uniform heat plate (4) and the refrigerator (1) are fixed to the radiation plate (7) via the connecting members.

3. The large-aperture annular low-temperature blackbody radiation source according to claim 1, It is characterized in that Silicone rubber is applied between the radiation plate (7) and the heating plate (3) to achieve adhesion between the two.

4. The large-aperture annular low-temperature blackbody radiation source according to claim 1, It is characterized in that The radiation plate (7) can be made of a graphite aluminum composite material.

5. The large-aperture annular low-temperature blackbody radiation source according to claim 1, It is characterized in that The outer heat insulation layer (2) and the inner heat insulation layer (5) can be made of glass fiber reinforced plastics.

6. The large-aperture annular low-temperature blackbody radiation source according to claim 1, It is characterized in that The outer frame (6) and the inner frame (8) can be made of aluminum alloy material.

7. The large-aperture annular low-temperature blackbody radiation source according to claim 1, It is characterized in that The uniform heat plate (4) can be made of non-metallic material with a temperature resistance of 150K to 450K.

8. The large-aperture annular low-temperature blackbody radiation source according to claim 1, It is characterized in that The refrigerator (1) can be made of aluminum alloy material.

9. The large-aperture annular low-temperature blackbody radiation source according to claim 1, It is characterized in that The annular low-temperature blackbody radiation source also includes a main frame (20), and four radiation source assemblies (10) are spliced ​​into an annular shape through the main frame (20) and are fixedly connected to the main frame (20).

10. A method for preparing a large-aperture annular low-temperature blackbody radiation source. It is characterized in that The preparation method is used to prepare a large-aperture annular low-temperature blackbody radiation source as claimed in any one of claims 1 to 9, and specifically comprises: For any radiation source assembly, the outer frame (6) and the inner frame (8) are arranged in the shape of the radiation plate. place; Placing the outer heat insulation layer (2) on the outer frame (6), and placing the inner heat insulation layer (5) on the inner frame (8); The radiation panel (7) is lowered from above the outer insulation layer (2) and the inner insulation layer (5) until it contacts the outer insulation layer (2) and the inner insulation layer (5), and matches the interface of the outer frame (6), the inner frame (8), the outer insulation layer (2) and the inner insulation layer (5); Fixing the outer frame (6), the inner frame (8), the outer insulation layer (2), the inner insulation layer (5) and the radiation plate (7); Apply silicone rubber on the radiation plate (7) and adhere the heating sheet (3) to the radiation plate (7); The uniform heating plate (4) is placed on the heating plate (3), and the uniform heating plate (4) is flattened using a pressing block, and is placed there for a preset time; The refrigerator (1) is placed on the uniform heating plate (4) and matched with the interface of the uniform heating plate (4); Fixing the radiation plate (7), the heating plate (3), the uniform heating plate (4) and the refrigerator (1); Repeat the above steps to complete the installation of four radiation source assemblies (10); Taking the main frame (20) as a reference, four radiation source components (10) are placed on the main frame (20) and fixedly connected to the main frame (20).

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