Low-temperature infrared calibration black body and temperature control box integrated system

Abstract

The invention relates to the technical field of infrared temperature measurement, and provides a low-temperature infrared calibration black body and temperature control box integrated system, which comprises a calibration black body, a temperature control box and a temperature adjusting device, and is characterized in that the calibration black body is provided with a first channel, and the temperature control box is provided with a second channel; the temperature adjusting device comprises a cold storage box, a supply pipeline, a backflow pipeline, a refrigerating mechanism and a heating mechanism, the supply pipeline is provided with a first supply branch and a second supply branch, the backflow pipeline is provided with a first backflow branch and a second backflow branch, and the first supply branch and the first backflow branch are connected with any one of the first channel and the second channel. The second supply branch and the second backflow branch are connected with any one of the first channel and the second channel, and the first supply branch, the first backflow branch, the second supply branch and the second backflow branch are provided with flow adjusting valves. Through the arrangement, the calibration black body and the temperature control box share the temperature adjusting device, and the problem that the calibration black body and the temperature control box are provided with independent refrigerating systems is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of infrared temperature measurement, and particularly to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box. Background Art

[0002] During the process of low-temperature infrared measurement, in order to ensure the measurement accuracy of an infrared thermometer, a calibration blackbody is required for high-precision calibration. As a temperature reference standard device, the calibration blackbody can provide an accurate temperature reference for the infrared thermometer to ensure the reliability and consistency of the measurement. In some measurement processes, it is necessary to control the temperature of the target object, and the target object needs to be placed in a chamber capable of temperature adjustment. Although the calibration blackbody also has a chamber, due to the low reflectivity of the calibration blackbody, while the chamber for accommodating the target object needs to have a high reflectivity, the calibration blackbody cannot be used as the chamber for accommodating the target object. Therefore, an additional temperature control box is required to accommodate the target object to meet the measurement requirements.

[0003] In the related art, the calibration blackbody and the temperature control box are respectively equipped with independent refrigeration systems, which easily lead to inconsistencies in parameters such as their temperatures and cooling rates, affecting the measurement accuracy of the infrared thermometer, and resulting in a large volume of the equipment, high costs, and low energy efficiency.

[0004] Therefore, how to solve the problem that the calibration blackbody and the temperature control box are respectively equipped with independent refrigeration systems has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] The present invention provides an integrated system of a low-temperature infrared calibration blackbody and a temperature control box to solve the defect that the calibration blackbody and the temperature control box are respectively equipped with independent refrigeration systems.

[0006] The present invention provides an integrated system of a low-temperature infrared calibration blackbody and a temperature control box, including: A calibration blackbody having a first channel for the circulation of a coolant, and a radiation port of the calibration blackbody is adapted to be docked with an infrared thermometer for low-temperature calibration; A temperature control box having an accommodation cavity inside, the temperature control box having a second channel for the circulation of a coolant, an accommodation cavity for placing a target object to be measured inside the temperature control box, and an observation port of the temperature control box is adapted to be docked with the infrared thermometer for low-temperature measurement; Temperature regulating device, comprising a cold storage tank, a supply pipeline, a return pipeline, a refrigeration mechanism and a heating mechanism, wherein the supply pipeline and the return pipeline are both connected to the cold storage tank, a power pump is arranged on the supply pipeline and / or the return pipeline, the supply pipeline has a first supply branch and a second supply branch, the return pipeline has a first return branch and a second return branch, the first supply branch and the first return branch are connected to both ends of any one of the first channel and the second channel, the second supply branch and the second return branch are connected to both ends of any one of the first channel and the second channel, the refrigeration mechanism is adapted to refrigerate the coolant in the cold storage tank, a first flow regulating valve is arranged on the first supply branch, a second flow regulating valve is arranged on the first return branch, a third flow regulating valve is arranged on the second supply branch, a fourth flow regulating valve is arranged on the second return branch, the heating mechanism is arranged on the supply pipeline, and the heating mechanism is adapted to heat the coolant in the supply pipeline.

[0007] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, the supply pipeline has a main supply path, one end of the main supply path is connected to the cold storage tank, and the first supply branch and the second supply branch are both connected to the other end of the main supply path; The return pipeline has a main return path, one end of the main return path is connected to the cold storage tank, and the first return branch and the second return branch are both connected to the other end of the main return path; The power pump includes a first power pump and a second power pump, the first power pump is arranged on the main supply path, and the second power pump is arranged on the main return path.

[0008] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, the refrigeration mechanism further includes: A storage tank, the inlet end of the storage tank is connected to the main return path through a first connection pipeline, a sixth flow regulating valve is arranged on the first connection pipeline, the outlet end of the storage tank is connected to the main return path or the cold storage tank through a second connection pipeline, and a seventh flow regulating valve is arranged on the main return path, and the seventh flow regulating valve is located between the first connection pipeline and the second connection pipeline.

[0009] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, the storage tank is connected to the main supply path through a supplementary pipeline, and a fifth flow regulating valve is arranged on the supplementary pipeline.

[0010] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, an eighth flow regulating valve is provided at one end of the supply main path away from the cold storage box, and a ninth flow regulating valve is provided at one end of the return main path away from the storage tank.

[0011] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, the first channel includes a water bath interlayer or a coil pipe; And / or, the second channel includes a water bath interlayer, a coil pipe, or a water bath interlayer flow channel.

[0012] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, the calibration blackbody includes a chamber blackbody or a surface source blackbody. The calibration blackbody is the chamber blackbody, and nitrogen is filled in the chamber blackbody.

[0013] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, the coolant is ethanol, 1-propanol, acetone, methylcyclohexane, or n-pentane.

[0014] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, it further includes an electric control box, a temperature detection element, a pressure detection element, an over-temperature protection device, and an over-pressure protection device to alarm or automatically stop the machine in an abnormal state.

[0015] According to an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention, it further includes a display screen. The display screen is suitable for supporting a multi-mode operation interface for the user to input instructions.

[0016] The integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention includes a calibration blackbody, a temperature control box, and a temperature adjustment device. The radiation port of the calibration blackbody is used to dock with an infrared thermometer for low-temperature calibration. The interior of the temperature control box has an accommodation cavity for accommodating the target object to be measured. The observation port of the temperature control box is used to dock with an infrared thermometer for low-temperature measurement. The calibration blackbody has a first channel for the circulation of a coolant. The coolant circulates in the first channel and can cool the calibration blackbody. The temperature control box has a second channel for the circulation of a coolant. The coolant circulates in the second channel and can cool the temperature control box. The temperature adjustment device includes a cold storage box, a supply pipeline, a return pipeline, a refrigeration mechanism, and a heating mechanism. Both the supply pipeline and the return pipeline are connected to the cold storage box. The supply pipeline has a first supply branch and a second supply branch, and the return pipeline has a first return branch and a second return branch. The first supply branch and the first return branch are connected to both ends of any one of the first channel and the second channel, and the second supply branch and the second return branch are connected to both ends of any one of the first channel and the second channel. The cold storage box stores a coolant, and the refrigeration mechanism is used to refrigerate the coolant in the cold storage box. The heating mechanism is arranged on the supply pipeline and is used to heat the coolant in the supply pipeline to adjust the temperature of the coolant. A first power pump is arranged on the supply pipeline. When the first power pump operates, it can transport the coolant in the cold storage box to the first channel and / or the second channel to cool the calibration blackbody and the temperature control box. A first flow regulating valve is arranged on the first supply branch, a second flow regulating valve is arranged on the first return branch, a third flow regulating valve is arranged on the second supply branch, and a fourth flow regulating valve is arranged on the second return branch. The flow rate of the coolant in the first channel and the second channel can be adjusted respectively through the first flow regulating valve, the second flow regulating valve, the third flow regulating valve, and the fourth flow regulating valve, so as to realize the temperature adjustment rate of the calibration blackbody and the temperature control box. The first supply branch and the second supply branch can be respectively connected to the calibration blackbody and the temperature control box, or the first supply branch and the second supply branch can be respectively connected to different temperature control boxes. With such a setting, the first supply branch and the first return branch are connected to the calibration blackbody, and the second supply branch and the second return branch are connected to the temperature control box. The coolant in the cold storage box can not only flow to the first channel of the calibration blackbody but also flow to the second channel of the temperature control box. Moreover, combined with the flow control of the coolant by the first flow regulating valve, the second flow regulating valve, the third flow regulating valve, and the fourth flow regulating valve, the refrigeration efficiency of the calibration blackbody and the temperature control box can be adjusted respectively, and the temperatures of the calibration blackbody and the temperature control box can be adjusted respectively, realizing the shared use of the temperature adjustment device by the calibration blackbody and the temperature control box, and solving the problem of separately equipping the calibration blackbody and the temperature control box with independent refrigeration systems. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of an integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the present invention.

[0019] Figure 2 It is a schematic diagram of the corresponding relationship between an infrared thermometer and a temperature control box during measurement provided by the present invention.

[0020] Figure 3 It is a schematic diagram of the corresponding relationship between an infrared thermometer and a calibration blackbody during calibration provided by the present invention.

[0021] Figure 4 It is a schematic diagram when the second channel of the temperature control box provided by the present invention is a water bath sandwich flow channel structure.

[0022] Figure 5 It is a schematic diagram when the first channel of the calibration blackbody provided by the present invention is a coil structure.

[0023] Figure 6 It is a schematic structural diagram of a refrigeration mechanism provided by the present invention.

[0024] Reference numerals: 1. Calibration blackbody; 2. First channel; 3. Temperature control box; 4. Second channel; 5. Cold storage box; 6. Refrigeration mechanism; 7. Heating mechanism; 8. First power pump; 9. First supply branch; 10. Second supply branch; 11. First return branch; 12. Second return branch; 13. First flow regulating valve; 14. Second flow regulating valve; 15. Third flow regulating valve; 16. Fourth flow regulating valve; 17. Supply main path; 18. Return main path; 19. Storage tank; 20. First connecting pipeline; 21. Sixth flow regulating valve; 22. Second connecting pipeline; 23. Seventh flow regulating valve; 24. Supplementary pipeline; 25. Fifth flow regulating valve; 26. Second power pump; 27. Eighth flow regulating valve; 28. Ninth flow regulating valve; 29. Evaporator; 30. Compressor; 31. Condenser; 32. Refrigerant storage tank; 33. Partial condenser separator; 34. Intermediate regenerator; 35. Low-temperature regenerator; 36. First throttle valve; 37. Second throttle valve; 38. Electric control box; 39. Display screen; 40. Infrared thermometer; 41. Light-shielding cover; 42. Infrared window piece; 43. Observation port. Specific embodiments

[0025] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts fall within the protection scope of the present invention.

[0026] The following will describe Figures 1 to 6 the integrated system of a low-temperature infrared calibration blackbody and a temperature control box of the present invention.

[0027] As Figures 1 to 6 shown, the integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by an embodiment of the present invention includes a calibration blackbody 1, a temperature control box 3 and a temperature adjustment device.

[0028] Specifically, the calibration blackbody 1 has a high and stable emissivity to ensure the precise correspondence between its radiation characteristics and temperature. The radiation port of the calibration blackbody 1 is used to dock with an infrared thermometer 40 for low-temperature calibration. During calibration, the light-shielding cover 41 of the infrared thermometer 40 is directly aligned with the radiation port of the calibration blackbody 1, so that the radiation of the calibration blackbody 1 completely covers the field of view of the infrared thermometer 40, and the calibration of the infrared thermometer 40 is achieved through the temperature change of the calibration blackbody 1.

[0029] The interior of the temperature control box 3 has a receiving cavity for placing a target object to be measured. The temperature control box 3 has an observation port 43, and the observation port 43 is used to dock with an infrared thermometer for low-temperature measurement. The surface of the receiving cavity of the temperature control box 3 has a high reflectivity. Specifically, the inner surface of the receiving cavity of the temperature control box 3 can be polished, and at the same time, the receiving cavity of the temperature control box 3 is evacuated to minimize external radiation interference, thereby improving the measurement accuracy. An infrared window plate 42 is provided at the observation port 43. During measurement, the light-shielding cover 41 of the infrared thermometer 40 is directly buckled at the infrared window plate 42. The inner surface of the selected blackbody cavity should be polished to have a high reflectivity, and at the same time, the cavity is evacuated to minimize external radiation interference to meet the measurement requirements of different samples, thereby realizing more accurate and diversified low-temperature infrared measurements.

[0030] The calibration blackbody 1 has a first channel 2 for the flow of a coolant, and the coolant flows in the first channel 2 and can cool the calibration blackbody 1.

[0031] The temperature control box 3 has a second channel 4 for the flow of a coolant, and the coolant flows in the second channel 4 and can cool the temperature control box 3.

[0032] The temperature regulating device includes a cold storage tank 5, a supply pipeline, a return pipeline, a refrigeration mechanism 6, and a heating mechanism 7. The supply pipeline and the return pipeline are both connected to the cold storage tank 5. The supply pipeline has a first supply branch 9 and a second supply branch 10, and the return pipeline has a first return branch 11 and a second return branch 12.

[0033] The first supply branch 9 and the first return branch 11 are connected to both ends of any one of the first channel 2 and the second channel 4, and the second supply branch 10 and the second return branch 12 are connected to both ends of any one of the first channel 2 and the second channel 4.

[0034] Specifically, the first supply pipeline and the first return pipeline can be connected to the first channel 2, and the second supply pipeline and the second return pipeline can be connected to the second channel 4; alternatively, the first supply pipeline and the first return pipeline can be connected to the second channel 4, and the second supply pipeline and the second return pipeline can be connected to the first channel 2; or the first supply pipeline, the first return pipeline, the second supply pipeline, and the second return pipeline can all be connected to the first channel 2, where the first supply pipeline and the first return pipeline are connected to the first channel 2 of one calibration black body 1, and the second supply pipeline and the second return pipeline are connected to the first channel 2 of another calibration black body 1; or the first supply pipeline, the first return pipeline, the second supply pipeline, and the second return pipeline can all be connected to the second channel 4, where the first supply pipeline and the first return pipeline are connected to the second channel 4 of one temperature control box 3, and the second supply pipeline and the second return pipeline are connected to the second channel 4 of another temperature control box 3. The specific connection is determined according to the usage requirements and is not specifically limited here.

[0035] The cold storage tank 5 stores a coolant, and the refrigeration mechanism 6 is used to refrigerate the coolant in the cold storage tank 5. The heating mechanism 7 is arranged on the supply pipeline, and the heating mechanism 7 is used to heat the coolant in the supply pipeline to adjust the temperature of the coolant.

[0036] A power pump is arranged on the supply pipeline and / or the return pipeline. When the power pump operates, it can transport the coolant in the cold storage tank 5 to the first channel 2 and / or the second channel 4 to refrigerate the calibration black body 1 and the temperature control box 3.

[0037] A first flow regulating valve 13 is provided on the first supply branch 9, a second flow regulating valve 14 is provided on the first return branch 11, a third flow regulating valve 15 is provided on the second supply branch 10, and a fourth flow regulating valve 16 is provided on the second return branch 12. The first flow regulating valve 13, the second flow regulating valve 14, the third flow regulating valve 15, and the fourth flow regulating valve 16 are used to control the on-off state of the corresponding branch and the flow rate of the secondary refrigerant. The flow rate of the secondary refrigerant in the first channel 2 and the second channel 4 can be adjusted respectively through the first flow regulating valve 13, the second flow regulating valve 14, the third flow regulating valve 15, and the fourth flow regulating valve 16, so as to achieve the temperature adjustment rate of the calibrated black body 1 and the temperature control box 3.

[0038] With such an arrangement, the first supply branch 9 and the first return branch 11 are connected to the calibrated black body 1, and the second supply branch 10 and the second return branch 12 are connected to the temperature control box 3. The secondary refrigerant in the cold storage tank 5 can not only flow to the first channel 2 of the calibrated black body 1, but also flow to the second channel 4 of the temperature control box 3. Moreover, combined with the flow control of the secondary refrigerant by the first flow regulating valve 13, the second flow regulating valve 14, the third flow regulating valve 15, and the fourth flow regulating valve 16, the refrigeration efficiency of the calibrated black body 1 and the temperature control box 3 can be adjusted respectively, and the temperatures of the calibrated black body 1 and the temperature control box 3 can be adjusted respectively, realizing the shared use of the temperature adjustment device by the calibrated black body 1 and the temperature control box 3, and solving the problem of separately equipping the calibrated black body 1 and the temperature control box 3 with independent refrigeration systems.

[0039] It should be noted that during use, the first flow regulating valve 13 and the fourth flow regulating valve 16, as well as the second flow regulating valve 14 and the third flow regulating valve 15, can be opened simultaneously, so that the secondary refrigerant can flow to the first channel 2 and the second channel 4 simultaneously, and the calibrated black body 1 and the temperature control box 3 can be refrigerated simultaneously by using the secondary refrigerant. It is also possible to only open the first flow regulating valve 13 and the fourth flow regulating valve 16, and close the second flow regulating valve 14 and the third flow regulating valve 15, so that the secondary refrigerant can only flow to the first channel 2, and the calibrated black body 1 can be refrigerated only by using the secondary refrigerant. It is also possible to only open the second flow regulating valve 14 and the third flow regulating valve 15, and close the first flow regulating valve 13 and the fourth flow regulating valve 16, so that the secondary refrigerant can only flow to the second channel 4, and the temperature control box 2 can be refrigerated only by using the secondary refrigerant. The opening and closing control of the first flow regulating valve 13, the second flow regulating valve 14, the third flow regulating valve 15, and the fourth flow regulating valve 16 can be determined according to the refrigeration requirements of the calibrated black body 1 and the temperature control box 2.

[0040] At least one of the above-mentioned first supply branch 9 and second supply branch 10 can be provided in parallel with at least two, so as to increase the number of calibrated black bodies 1 and the number of temperature control boxes 3, realize the flexible expansion of the integrated system of the low-temperature infrared calibrated black body and the temperature control box, and meet the multi-module temperature control requirements under different experimental conditions.

[0041] The above heating mechanism 7 can, but is not limited to, select a sheathed heater.

[0042] In the embodiment of the present invention, the supply pipeline has a main supply path 17. One end of the main supply path 17 is connected to the cold storage tank 5, and the first supply branch 9 and the second supply branch 10 are both connected to the other end of the main supply path 17. The return pipeline has a main return path 18. One end of the main return path 18 is connected to the cold storage tank 5, and the first return branch 11 and the second return branch 12 are both connected to the other end of the main return path 18.

[0043] The power pumps include a first power pump 8 and a second power pump 26. The first power pump 8 is arranged on the main supply path 17, and the second power pump 26 is arranged on the main return path 18 to provide power for the circulating flow of the coolant.

[0044] In this embodiment, the refrigeration mechanism 6 further includes a storage tank 19. The inlet end of the storage tank 19 is connected to the main return path 18 through a first connection pipeline 20. A sixth flow regulating valve 21 is arranged on the first connection pipeline 20. The sixth flow regulating valve 21 can control the on-off state and the flow rate of the first connection pipeline 20 to realize the control of the flow condition of the coolant into the storage tank 19.

[0045] A seventh flow regulating valve 23 is arranged on the main return path 18. The seventh flow regulating valve 23 is located between the first connection pipeline 20 and the second connection pipeline 22. The seventh flow regulating valve 23 can control the on-off state and the flow rate of the part of the main return path 18 between the first connection pipeline 20 and the second connection pipeline 22.

[0046] The volume of the storage tank 19 is larger than that of the cold storage tank 5. The storage tank 19 can store the coolant. When it is necessary to disassemble and replace the calibration black body 1 and the temperature control box 3, the seventh flow regulating valve 23 can be controlled to be in the cut-off state, and the sixth flow regulating valve 21 can be controlled to be in the conducting state, so that the coolant in the cold storage tank 5, the first channel 2, the second channel 4, the supply pipeline and the return liquid pipeline gathers into the storage tank 19. In this way, at least after the coolant in the first channel 2 and the second channel 4 is emptied, the calibration black body 1 and the temperature control box 3 can be disassembled and replaced.

[0047] The outlet end of the storage tank 19 is connected to the main return path 18 or the cold storage tank 5 through a second connection pipeline 22. The second connection pipeline 22 connects the inner cavity of the storage tank 19 and the inner cavity of the cold storage tank 5 to balance the pressure, and can reduce the flow resistance of the coolant when the coolant gathers into the storage tank 19.

[0048] In a further embodiment, the storage tank 19 is connected to the main supply line 17 through a replenishment line 24, and a fifth flow regulating valve 25 is provided on the replenishment line 24. The fifth flow regulating valve 25 can control the on / off state and the flow rate of the main supply line 17, so as to control the replenishment of the coolant from the storage tank 19 to the cold storage tank 5.

[0049] After replacing the calibrated black body 1 or the temperature control box 3, when the integrated system of the low-temperature infrared calibrated black body and the temperature control box is run again, the sixth flow regulating valve 21 can be controlled to be in the cut-off state, and the seventh flow regulating valve 23 and the fifth flow regulating valve 25 can be controlled to be in the conducting state. When the first power pump 8 is running, it can transport the coolant in the storage tank 19 into the supply pipeline. After the coolant flows to the main return line 18, it flows through the seventh flow regulating valve 23 and then into the cold storage tank 5. The coolant in the cold storage tank 5 will participate in the circulation. During the circulation of the coolant, by controlling the opening degree of the fifth flow regulating valve 25, the replenishment rate of the coolant into the main supply line 17 can be controlled.

[0050] In this embodiment, the refrigeration mechanism 6 further includes a second power pump 26. The second power pump 26 is arranged on the main return line 18 and is located upstream of the first connection pipeline 20. When aggregating the coolant into the storage tank 19, the second power pump 26 can provide power.

[0051] In the embodiment of the present invention, an eighth flow regulating valve 27 is provided at one end of the main supply line 17 away from the cold storage tank 5. The eighth flow regulating valve 27 can control the on / off state and the flow rate of the main supply line 17. A ninth flow regulating valve 28 is provided at one end of the main return line 18 away from the storage tank 19. The ninth flow regulating valve 28 can control the on / off state and the flow rate of the main return line 18.

[0052] In the embodiment of the present invention, the first channel 2 can be set in the structural form of a water bath sandwich, as Figure 4 shown; the first channel 2 can also be set in the structural form of a coiled pipe, as Figure 1 and Figure 5 shown. To reduce the radiative loss of cold, a cold shield can also be provided on the calibrated black body 1, and the cold shield covers the outside of the whole first channel 2.

[0053] The second channel 4 can be set in the structural form of a water bath sandwich, as Figure 2 shown; the second channel 4 can also be set in the structural form of a coiled pipe, as Figure 1 shown. The second channel 4 can also be set in the structural form of a water bath sandwich flow channel, as Figure 4 shown, that is, on the basis of the water bath sandwich structure, partitions are added to form a flow channel, so that the coolant can flow orderly, increasing the flow path of the coolant, which is beneficial to improving the refrigeration efficiency.

[0054] In the embodiment of the present invention, the calibration blackbody 1 includes a cavity blackbody or a surface source blackbody.

[0055] The cavity blackbody has a very high and stable emissivity, which can ensure the precise correspondence between its radiation characteristics and temperature, has significant advantages in measurement accuracy, and can adapt to a wide temperature range and can be used in the measurement from low temperature to high temperature. In addition, the cavity blackbody can also maintain high temperature stability and uniformity, which is beneficial to improving the calibration accuracy.

[0056] The surface source blackbody is small in volume, light in weight, convenient to carry and operate, and has the advantage of low cost.

[0057] The cavity blackbody or the surface source blackbody can be selected as the calibration blackbody 1 according to specific requirements.

[0058] When the cavity blackbody is selected as the calibration blackbody 1, the emissivity can be improved by coating a high-emissivity black paint on the inner surface of the cavity. Nitrogen can be filled in the cavity blackbody to avoid the problem of condensation in the cavity.

[0059] In this embodiment, the coolant can be ethanol, 1-propanol, acetone, methylcyclohexane or n-pentane. The temperature in the temperature control box 3 can be lowered to a minimum of -80°C, and the maximum cooling rate can exceed 20 Kelvin per minute (symbol: K / min).

[0060] In the embodiment of the present invention, the refrigeration mechanism 6 includes an evaporator 29, and the evaporator 29 is arranged in the cold storage tank 5. The refrigerant evaporates and absorbs heat in the evaporator 29, and can absorb the heat of the coolant to realize the refrigeration of the coolant.

[0061] The refrigerant can be one or more of ethane, propane, isobutane, isopentane, ethylene, and the temperature of the evaporator 29 can be lowered to a minimum of -100°C.

[0062] The refrigeration mechanism 6 further includes a compressor 30, a condenser 31, a refrigerant storage tank 32, a fractionating separator 33, an intermediate heat regenerator 34, a low-temperature heat regenerator 35, a first throttle valve 36 and a second throttle valve 37, and the connection relationship is referred to Figure 6 . The mixed refrigerant is converted into an oil-containing high-temperature and high-pressure gas after passing through the compressor 30, and the high-temperature and high-pressure gas is converted into a normal-temperature and high-pressure gas after passing through the condenser 31. The refrigerant storage tank 32 is used to supplement the refrigerant. Part of the high-boiling refrigerant is filtered into a high-pressure liquid phase after passing through the fractionating separator 33 and the intermediate heat regenerator 34, and then passes through the first throttle valve 36 and returns to the compressor 30 in a low-pressure liquid phase form. The remaining low-boiling refrigerant is further cooled through the low-temperature heat regenerator 35, and then becomes a low-temperature and low-pressure liquid after passing through the second throttle valve 37, enters the evaporator 29 and evaporates and absorbs heat, thereby reducing the temperature of the coolant in the cold storage tank 5.

[0063] In the refrigeration mechanism, the refrigerant sequentially passes through a compressor 30, a condenser 31, a partial condenser separator 33, an intermediate regenerator 34, a low-temperature regenerator 35, a second throttle valve 37, and an evaporator 29; a refrigerant storage tank 32 is connected in parallel in the refrigeration mechanism, and controllably supplies and discharges refrigerant into the system.

[0064] In addition, the integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the embodiment of the present invention further includes an electric control box 38, a temperature detection element, a pressure detection element, an over-temperature protection device, and an over-pressure protection device, and can be equipped with alarm and automatic shutdown functions for abnormal states such as over-current, over-load, and power-off, so as to ensure the safety and stability of the equipment operation. The electric control box 38 is electrically connected to each flow regulating valve, and a display screen 39 is integrated on the electric control box 38. The display screen 39 facilitates the user to operate the temperature reduction process, supports a multi-mode operation interface, and facilitates the user to perform automatic or manual adjustment through the touch screen.

[0065] The integrated system of a low-temperature infrared calibration blackbody and a temperature control box provided by the embodiment of the present invention innovatively integrates the refrigeration of the calibration blackbody 1 and the refrigeration of the temperature control box 3 efficiently, and has the advantages of high efficiency, stability, and high integration. Combining different control strategies, independent temperature control and synchronous temperature control of the calibration blackbody 1 and the temperature control box 3 can be realized. During independent temperature control, precise temperature adjustment tasks can be executed respectively. During synchronous temperature control, through the regulation of each flow valve, the integrated operation of the system is realized to meet the high-precision temperature control requirements.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated system of a low-temperature infrared calibration blackbody and a temperature control box, characterized in that, Comprising: A calibrated black body (1) having a first channel (2) for the circulation of a secondary refrigerant, the radiation port of the calibrated black body (1) being adapted to be docked with an infrared thermometer (40) for low-temperature calibration; A temperature control box (3) having a second channel (4) for the circulation of a secondary refrigerant, the interior of the temperature control box (3) having an accommodation cavity for placing a target object to be measured, and the observation port (43) of the temperature control box (3) being adapted to be docked with the infrared thermometer (40) for low-temperature measurement; A temperature adjustment device comprising a cold storage tank (5), a supply pipeline, a return pipeline, a refrigeration mechanism (6) and a heating mechanism (7), the supply pipeline and the return pipeline being both connected to the cold storage tank (5), the supply pipeline and / or the return pipeline being provided with a power pump, the supply pipeline having a first supply branch (9) and a second supply branch (10), the return pipeline having a first return branch (11) and a second return branch (12), the first supply branch (9) and the first return branch (11) connecting the two ends of any one of the first channel (2) and the second channel (4), the second supply branch (10) and the second return branch (12) connecting the two ends of any one of the first channel (2) and the second channel (4), the refrigeration mechanism (6) being adapted to refrigerate the secondary refrigerant in the cold storage tank (5), a first flow regulating valve (13) being provided on the first supply branch (9), a second flow regulating valve (14) being provided on the first return branch (11), a third flow regulating valve (15) being provided on the second supply branch (10), a fourth flow regulating valve (16) being provided on the second return branch (12), and the heating mechanism (7) being provided on the supply pipeline, the heating mechanism (7) being adapted to heat the secondary refrigerant in the supply pipeline.

2. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 1, wherein The supply pipeline has a supply main path (17), one end of the supply main path (17) being connected to the cold storage tank (5), and the first supply branch (9) and the second supply branch (10) both being connected to the other end of the supply main path (17); The return pipeline has a return main path (18), one end of the return main path (18) being connected to the cold storage tank (5), and the first return branch (11) and the second return branch (12) both being connected to the other end of the return main path (18); The power pumps include a first power pump (8) and a second power pump (26), the first power pump (8) being provided on the supply main path (17), and the second power pump (26) being provided on the return main path (18).

3. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 2, wherein The refrigeration mechanism (6) further includes: Storage tank (19), the inlet end of the storage tank (19) is connected to the main return line (18) through a first connecting pipeline (20), a sixth flow regulating valve (21) is provided on the first connecting pipeline (20), the outlet end of the storage tank (19) is connected to the main return line (18) or the cold storage tank (5) through a second connecting pipeline (22), a seventh flow regulating valve (23) is provided on the main return line (18), and the seventh flow regulating valve (23) is located between the first connecting pipeline (20) and the second connecting pipeline (22).

4. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 3, characterized in that, The storage tank (19) is connected to the main supply line (17) through a supplementary pipeline (24), and a fifth flow regulating valve (25) is provided on the supplementary pipeline (24).

5. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 3, wherein, An eighth flow regulating valve (27) is provided at one end of the main supply line (17) away from the cold storage tank (5), and a ninth flow regulating valve (28) is provided at one end of the main return line (18) away from the storage tank (19).

6. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 1, characterized in that, The first channel (2) includes a water bath sandwich or a coil. And / or, the second channel (4) includes a water bath sandwich, a coil, or a water bath sandwich flow channel.

7. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 1, characterized in that, The calibration black body (1) includes a chamber black body or a surface source black body, the calibration black body (1) is the chamber black body, and nitrogen is filled in the chamber black body.

8. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 1, characterized in that, The coolant is ethanol, 1-propanol, acetone, methylcyclohexane or n-pentane.

9. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 1, wherein, It also includes an electric control box (38), a temperature detection element, a pressure detection element, an over-temperature protection device and an over-pressure protection device to give an alarm or automatically stop the machine in case of an abnormal state.

10. The integrated system of a low-temperature infrared calibration blackbody and a temperature control box according to claim 9, characterized in that, It also includes a display screen (39), and the display screen (39) is suitable for supporting a multi-mode operation interface for the user to input instructions.

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