A multi-modal thermal property measurement device

Abstract

The utility model belongs to the thermal physical property measurement field, specifically is a kind of multimode thermal physical property measuring device, including host casing, the inner chamber of host casing is fixedly connected with partition, infrared temperature measurement component, data acquisition and analysis unit, heat flow detector, thermocouple and direct current power supply, and the side of host casing is equipped with sample inlet;The device utilizes the simultaneous action of multiple thermal analysis parameters, accurately simulates the complex environment of thermal analysis, and by adjusting temperature, heat flow, sample state and other parameters in control system, the accuracy and test efficiency of thermal physical property measurement are significantly improved, the system structure is simple, and reliability is high, and adaptability is strong, the multiple thermal performance of material can be measured and analyzed, and sample supply device is located at the outside of host casing, not only can save host casing internal space, but also can replace sample type at any time, simulate various sample morphologies that may be encountered in actual thermal analysis.

Description

Technical Field

[0001] This utility model relates to the field of thermal property measurement, specifically a multimodal thermal property measurement device. Background Technology

[0002] Traditional thermal analysis equipment, such as differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and flow calorimetry, each has specific functions. These devices simulate different thermal environments to perform thermal analysis tests on substances and obtain relevant thermophysical parameters. They can control factors such as temperature within a certain range and complete the detection of the thermal properties of substances by setting specific test programs, providing thermophysical data support for materials research, industrial production, and other fields. This thermal analysis method is not limited by time or location; the entire testing process can be completed simply by adjusting relevant parameters on the equipment, which improves experimental efficiency to a certain extent. In existing technologies, traditional thermal analysis equipment such as DSC, TGA, and flow calorimeters have single functions and are independent of each other. They can only measure and analyze one or two thermal properties of a substance, and cannot comprehensively control and analyze the thermal characteristics of a substance in terms of heat flow, mass change, temperature distribution, etc. In addition, the sample supply structure of traditional equipment is mainly installed inside the equipment, which not only occupies the internal space of the equipment, but also makes it difficult to change the sample type at will. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, traditional thermal analysis equipment such as DSC, TGA, and flow calorimeters have limited and independent functions, and can only measure and analyze one or two thermal properties of a substance. They cannot comprehensively control and analyze the thermal characteristics of a substance in terms of heat flow, mass change, temperature distribution, and other aspects. In addition, the sample supply structure of traditional equipment is mainly installed inside the equipment, which not only occupies the internal space of the equipment, but also makes it difficult to change the sample type at will. This utility model proposes a multimodal thermal property measurement device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a multimodal thermophysical property measuring device, including a main housing, a partition plate, an infrared temperature measurement component, a data acquisition and analysis unit, a heat flow detector, a thermocouple, and a DC power supply fixedly connected to the inner cavity of the main housing, a sample inlet on one side of the main housing, and a sample outlet on the other side of the main housing, a heating and insulation component fixedly connected to the inner cavity of the sample inlet and the sample outlet, and a micro-element distributed thermal balance analysis module fixedly connected to the inner cavity of the heating and insulation component. A microfluidic sample cell is fixedly connected to the inner cavity. A first support plate is fixedly connected to one side of the main housing. A gas-liquid cylinder and a T-shaped plate are fixedly connected to the top of the first support plate. A first pipe is fixedly connected to the top of the gas-liquid cylinder. A liquid pump is fixedly connected to the top of the T-shaped plate. The input end of the liquid pump is fixedly connected to one end of the first pipe. A second pipe is fixedly connected to the output end of the liquid pump. A flow controller is fixedly connected to one end of the second pipe. An injection tube is fixedly connected to one side of the flow controller. The injection tube is fixedly connected to the inner cavity of the injection port.

[0005] Preferably, the top of the main unit housing is fixedly connected to a switch, an intelligent control panel, and a multi-parameter integrated detector, and the inner cavity of the main unit housing is fixedly connected to a multi-segment heating tube and a high-precision thermometer.

[0006] Preferably, a miniature liquid storage tank and a miniature pump are fixedly connected to the top of the main unit housing. A third pipe is fixedly connected to the top of the miniature liquid storage tank. The third pipe is fixedly connected to the input end of the miniature pump. A fourth pipe is fixedly connected to the output end of the miniature pump. One end of the fourth pipe extends into the inner cavity of the main unit housing.

[0007] Preferably, a cylinder is fixedly connected to the top of the partition plate, and two cylinders are provided. A high-temperature protective layer is fixedly connected to the inner cavity of the main unit housing.

[0008] Preferably, a sample outlet tube is fixedly connected to the inner cavity of the sample outlet, a second support plate is fixedly connected to one side of the main housing, and a collection box is provided on the top of the second support plate.

[0009] Preferably, a movable door is movably hinged to one side of the main unit housing via a hinge, and an observation window is fixedly connected to the inner cavity of the movable door.

[0010] Preferably, a fifth conduit is fixedly connected to the inner cavity of the injection tube, and a precision valve is fixedly connected to one side of the fifth conduit.

[0011] Preferably, casters are fixedly connected to the four corners of the bottom of the main unit housing, and a heat dissipation vent is provided on one side of the main unit housing.

[0012] The advantages of this utility model are: 1. The switch in this device can be programmed to perform tests, enabling the liquid pump to extract gas and liquid from the gas-liquid cylinder and deliver it to the microfluidic sample cell. The infrared temperature measurement component and the micro-element distributed thermal balance analysis module allow the system to automatically perform multi-parameter synchronous acquisition of temperature / heat flux / mass, and simultaneously feed the data back to the data acquisition and analysis unit in real time to generate thermophysical property spectra. This device utilizes the simultaneous action of multiple thermal analysis parameters to comprehensively and accurately simulate the complex environment of thermal analysis. Furthermore, by adjusting and controlling parameters such as temperature, heat flux, and sample state within the control system, it significantly improves the accuracy and efficiency of thermophysical property measurement. At the same time, the system has a simple structure, high reliability, and strong adaptability, and can measure and analyze various thermal properties of substances. 2. In this device, the external sample supply devices, such as gas and liquid cylinders, liquid pumps, and flow controllers, are all located outside the main unit housing. This not only saves internal space of the main unit housing but also allows for the replacement of sample types at any time, simulating various sample forms that may be encountered in actual thermal analysis.

[0013] 3. This device achieves thermal analysis with a spatial resolution of 0.5 mm through a micro-element distributed thermal balance analysis module and a high-precision infrared temperature measurement component, providing more detailed and accurate data for thermal property research and helping to deepen the understanding of the thermal behavior of materials; 4. This device utilizes a high-speed galvanometer system and infrared dynamic tracking technology to achieve millisecond-level dynamic tracking, thereby effectively capturing transient thermal processes. It has significant advantages for measuring dynamic thermal phenomena such as rapid response and vibrating pipes. 5. The multimodal thermal analysis integration technology in this device enables the simultaneous measurement of multiple parameters such as specific heat, heat of reaction, and mass loss in a single sample loading. This design avoids errors caused by sample transfer and greatly improves testing efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall equipment of this utility model; Figure 2 This is a three-dimensional schematic diagram of the liquid pump of this utility model; Figure 3 This is a cross-sectional schematic diagram of the main unit housing of this utility model; Figure 4 This is a three-dimensional schematic diagram of the heat dissipation and ventilation opening of this utility model; Figure 5 This is a cross-sectional schematic diagram of the microchannel sample cell of this utility model; Figure 6 This is a schematic diagram of the multimodal dynamic tracking calorimetry of this utility model; Figure 7 This is a circuit diagram of the data acquisition and analysis unit of this utility model; Figure 8 This is a schematic diagram of the self-calibration technology of the heat flow meter of this utility model.

[0016] In the diagram: 1. Main unit housing; 21. Partition plate; 22. Infrared temperature measurement component; 23. Data acquisition and analysis unit; 24. Heat flow detector; 25. Sample inlet; 26. Sample outlet; 27. Heating and insulation component; 28. Micro-element distributed thermal balance analysis module; 29. ​​Microchannel sample cell; 210. First support plate; 211. Gas-liquid cylinder; 212. First pipeline; 213. T-shaped plate; 214. Liquid pump; 215. Second pipeline; 216. Flow controller; 217. Sample inlet tube; 218. Heat... 219. Electrocouple; 31. DC power supply; 32. Switch; 33. Intelligent control panel; 34. Multi-parameter integrated detector; 35. Multi-segment heating element; 46. High-precision thermometer; 47. Miniature liquid storage tank; 48. Third pipeline; 49. Miniature pump; 40. Fourth pipeline; 51. Cylinder; 52. High-temperature protective layer; 63. Sample outlet tube; 64. Second support plate; 65. Collection box; 76. Movable door; 77. Observation window; 88. Fifth pipeline; 89. Precision valve; 90. Casters; 91. Heat dissipation and ventilation opening. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0018] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail. This application discloses a multimodal thermophysical property measurement device. (Refer to...) Figure 1-8A multimodal thermophysical property measurement device includes a main housing 1. A partition plate 21, an infrared temperature measurement component 22, a data acquisition and analysis unit 23, a heat flow detector 24, a thermocouple 218, and a DC power supply 219 are fixedly connected to the inner cavity of the main housing 1. An inlet 25 is provided on one side of the main housing 1, and an outlet 26 is provided on the other side. A heating and insulation component 27 is fixedly connected to the inner cavity of the inlet 25 and the outlet 26. A micro-element distributed thermal balance analysis module 28 is fixedly connected to the inner cavity of the heating and insulation component 27. A microchannel sample cell 29 is fixedly connected to the inner cavity of the micro-element distributed thermal balance analysis module 28. A first support plate 210 is fixedly connected to one side of the shell 1. A gas-liquid cylinder 211 and a T-shaped plate 213 are fixedly connected to the top of the first support plate 210. A first pipe 212 is fixedly connected to the top of the gas-liquid cylinder 211. A liquid pump 214 is fixedly connected to the top of the T-shaped plate 213. The input end of the liquid pump 214 is fixedly connected to one end of the first pipe 212. A second pipe 215 is fixedly connected to the output end of the liquid pump 214. A flow controller 216 is fixedly connected to one end of the second pipe 215. A sample inlet tube 217 is fixedly connected to one side of the flow controller 216. The sample inlet tube 217 is fixedly connected to the inner cavity of the sample inlet 25. The partition 21 divides the internal space of the main housing 1 into upper and lower layers. The upper layer is the sample analysis chamber, and the lower layer is the auxiliary equipment compartment. Through the data acquisition and analysis unit 23, parameters such as temperature, heat flow, and mass can be detected in real time, thereby enabling more precise control of the thermal analysis process. The infrared temperature measurement component 22 is an infrared thermal imager, employing a high-precision dual-band infrared imaging system, model IR-MS200, which integrates long-wave infrared and near-infrared detection technologies. It can directly perform non-contact temperature measurement on the sample. It has high-speed data acquisition capabilities, enabling real-time capture of changes in the sample temperature field. The generated infrared image data can be directly used for temperature distribution analysis without a complex conversion process. The infrared thermal imager applies advanced optical imaging principles, focusing the infrared radiation of the sample through an optical lens, and then converting the infrared radiation into an electrical signal by a detector. After processing, a temperature image is formed. Then, image fusion technology is used to fuse infrared images of different bands to improve the accuracy of temperature measurement. The temperature data is transmitted to the analysis module through a high-speed data transmission system to obtain real-time temperature distribution results. The dynamic tracking temperature measurement module based on infrared thermal imager and spot thermometer adopts a coaxial dual-band temperature measurement system, integrating long-wave infrared and near-infrared high-temperature cameras, covering an extremely wide temperature range (-50~1500℃), and integrating a high-speed galvanometer system to achieve millisecond-level one-dimensional scanning. Compared with the traditional contact measurement method of thermocouples, this design effectively avoids thermal disturbance caused by contact through non-contact dynamic aiming, and can accurately capture the temperature distribution of micron-level displacement targets, realize continuous temperature field reconstruction of complex objects such as vibrating pipes, and control the measurement error to <0.1mm; The active three-dimensional gradient adiabatic system features a unique sandwich structure: an outer Peltier water bath jacket (ΔT≤1℃ for tracking sample temperature), a middle segmented heating screen (each segment independently controlled by PID, temperature difference ≤0.5℃), and an inner microchannel sample cell (liquid / gas). Heat loss is compensated in real-time via thermopile differential feedback. Traditional adiabatic systems experience significant heat loss during rapid heating, reaching up to 100 J / h. This design successfully controls heat loss to <5 J / h, significantly improving adiabatic efficiency by 20 times, providing a stable and reliable adiabatic environment for high-precision thermal measurements. The micro-element distributed thermal balance analysis model discretizes the sample channel into N micro-elements (micro-element length ≤ 1 mm), and establishes a detailed equation for each micro-element: Q_elec[i] - Q_loss[i] = m・Cp・ΔT[i] + ΔH_rxn[i]. Combined with in-situ measurement of electrothermal power (four-wire resistance method, accuracy ±0.01%) and a thermal loss calibration database, this approach achieves "white-box" process measurement, accurately locating reaction hotspots with a spatial resolution of up to 0.5 mm, providing richer and more accurate information for thermal process analysis. Multimodal thermal analysis integrates multiple functions such as DSC, TGA, and flow mode. In DSC mode, Cp and ΔH_trans are measured by differential temperature control (±0.1℃) of upper and lower heating screens. In TGA mode, a microbalance (resolution 0.1μg) is integrated to measure the rate of mass change. In flow mode, a microchannel + electrothermal Joule heating (0 - 1500℃) is used to measure the heat sink and pyrolysis depth distribution, avoiding sample transfer errors in traditional multi-device testing. It can complete the simultaneous analysis of specific heat, reaction heat, and mass loss in a single sample loading, greatly improving testing efficiency and the accuracy of results. Gordon's heat flow meter self-calibration technology deposits a high emissivity coating (ε>0.95) on the sample cell surface and achieves low heat flow (<10W / m²) through dual-wire closed-loop control (sensing element vs. heat sink). 2 Self-correcting: Traditional heat flow meters output close to zero under small temperature differences, failing to meet the needs of some studies requiring low heat flow measurements. This solution can measure 0.1 W / m³. 2 The micro-heat flow at this level is particularly suitable for research fields that are sensitive to micro-heat flow, such as phase transitions in nanomaterials. The micro-element distributed thermal balance analysis module 28, as the core of this patented system, consists of a high-temperature resistant GH3128 alloy tube, the aforementioned infrared thermometer (composed of a long-wave thermal imager and a near-infrared high-temperature camera), a DC power supply 219, an N-type thermocouple 218, and a pressure transmitter. The GH3128 alloy possesses excellent high-temperature stability and oxidation resistance, maintaining superior mechanical properties even at operating temperatures up to 1223.15K. The heating section has a tube length of 800 mm and uses an infrared thermometer with an accuracy of 0.5% and a matching two-dimensional motion transmission device to scan and measure the surface temperature of the tube. The DC power supply 219 provides a stable current output to the tube. N-type thermocouples 218 and pressure transmitters are installed at the inlet 25 and outlet 26 of the tube to detect the temperature and pressure of the fluid inside the tube, further improving the accuracy and comprehensiveness of the system's fluid thermophysical property measurement. The main housing 1 can be equipped with a dedicated air duct, which contains a high-speed circulating fan, a precision heater, and a cooler. Both the sample inlet 25 and the sample outlet 26 use high-temperature and high-pressure resistant hoses. The liquid pump 214 can draw the sample from the gas-liquid cylinder 211 through the first pipe 212, and then enter the sample inlet tube 217 and the microchannel sample cell 29 through the second pipe 215 and the flow controller 216. Since it is located outside the main housing 1, it not only saves the internal space of the main housing 1, but also allows the sample type to be changed at any time, simulating various sample forms that may be encountered in actual thermal analysis. The flow controller 216 can adjust the supply rate. The gas-liquid cylinder 211 can be detached for easy sample type change. The main housing 1 is made of high-strength alloy material and high-temperature resistant ceramic material, and the internal core components are made of aerospace-grade stainless steel.

[0019] Reference Figure 2-3 The top of the main unit housing 1 is fixedly connected to a switch 31, an intelligent control panel 32, and a multi-parameter integrated detector 33. The inner cavity of the main unit housing 1 is fixedly connected to a multi-segment heating tube 34 and a high-precision thermometer 35. The intelligent control panel 32 facilitates operation and setting of thermal analysis programs, improving the ease of system operation. The switch 31 can be connected to the data acquisition and analysis unit 23. The multi-parameter integrated detector 33 can accurately measure various parameters such as temperature, heat flow, and mass during the thermal analysis process, thereby comprehensively analyzing the thermal performance of the sample. The multi-segment heating tube 34 can accurately simulate high-temperature environments of different gradients, thereby testing the thermal stability of the sample under different high-temperature gradients.

[0020] Reference Figure 3A micro liquid storage tank 41 and a micro pump 43 are fixedly connected to the top of the main unit housing 1. A third pipe 42 is fixedly connected to the top of the micro liquid storage tank 41. The third pipe 42 is fixedly connected to the input end of the micro pump 43. A fourth pipe 44 is fixedly connected to the output end of the micro pump 43. One end of the fourth pipe 44 extends into the inner cavity of the main unit housing 1. The micro pump 43 can extract the internal moisture of the micro liquid storage tank 41 through the third pipe 42 and spray it into the interior of the main unit housing 1 through the fourth pipe 44, so that the interior of the main unit housing 1 can simulate different humidity environments, thereby testing the thermal performance changes of the sample under different humidity conditions.

[0021] Reference Figure 3 A cylinder 51 is fixedly connected to the top of the partition plate 21. There are two cylinders 51. A high-temperature protective layer 52 is fixedly connected to the inner cavity of the main body housing 1. The two cylinders 51 can clamp and fix the sample on the upper side of the partition plate 21. The high-temperature protective layer 52 can be supported by rock wool board. Rock wool board has excellent high-temperature resistance and can effectively prevent high temperature from damaging the inner wall of the sample main body housing 1 and extend the service life of the main body housing 1.

[0022] Reference Figure 3 The sample outlet 26 is fixedly connected to the inner cavity of the sample outlet tube 61, and a second support plate 62 is fixedly connected to one side of the main unit housing 1. A collection box 63 is set on the top of the second support plate 62. The sample outlet tube 61 can discharge the sample after the experiment, while the collection box 63 can collect the sample after the reaction, so that the sample is not left in the main unit housing 1 and can be reasonably recycled and treated, which meets the environmental protection requirements.

[0023] Reference Figure 1 A movable door 71 is movably hinged to one side of the main housing 1 via a hinge. An observation window 72 is fixedly connected to the inner cavity of the movable door 71. The movable door 71 is manufactured using high-precision processing equipment, and the outer shell surface is treated with anti-corrosion, making it beautiful and durable. The color matching is reasonable, and the structure is compact. The observation window 72 facilitates clear observation of the experimental changes in the sample analysis chamber. The observation window 72 is made of high-temperature and high-pressure resistant material and is covered with an anti-infrared radiation film.

[0024] Reference Figure 2 The inner cavity of the injection tube 217 is fixedly connected to a fifth pipe 81, and a precision valve 82 is fixedly connected to one side of the fifth pipe 81. The fifth pipe 81 connected to the surface of the injection tube 217 can be connected to other quick connectors at the outer end through the precision valve 82. Different sample types or different reaction reagents can be added by arbitrarily changing variables, making the experiment more universal. In addition, the precision valve 82 can also precisely control the injection rate of different samples or reagents to ensure the accuracy of the experiment.

[0025] Reference Figure 4The main unit housing 1 is fixedly connected to four corners of the bottom with casters 91. A heat dissipation vent 92 is provided on one side of the main unit housing 1. The casters 91 are equipped with brake pads, which can facilitate the movement and fixation of the main unit housing 1, improve the flexibility of the main unit housing 1, and facilitate the heat dissipation and exhaust of the main unit housing 1.

[0026] Working principle: First, the switch 31 is turned on to set the test program. Then, the liquid pump 214 is started to draw gas and liquid from the gas-liquid cylinder 211 through the first pipe 212, and the gas and liquid are transported to the inside of the microfluidic sample cell 29 through the second pipe 215. Then, the infrared temperature measurement component 22 and the micro-element distributed thermal balance analysis module 28 are started, so that the system can automatically perform multi-parameter synchronous acquisition of temperature / heat flux / mass. After that, the data will be fed back to the data acquisition and analysis unit 23 in real time and generate a thermophysical property spectrum. The waste liquid after the test will be discharged into the collection box 63 through the sample outlet pipe 61 for recycling. This device utilizes the simultaneous action of multiple thermal analysis parameters to comprehensively and accurately simulate the complex environment of thermal analysis. Furthermore, by adjusting and controlling parameters such as temperature, heat flux, and sample state within the control system, the thermophysical property is significantly improved. This system improves the accuracy and efficiency of thermal analysis. Furthermore, it features a simple structure, high reliability, and strong adaptability. The external sample supply devices, such as the gas-liquid cylinders 211 and the liquid pump 214, are located outside the main housing 1. This not only saves internal space but also allows for easy switching of sample types, simulating various sample forms encountered in actual thermal analysis. This solves the problems of traditional thermal analysis equipment such as DSC, TGA, and flow calorimeters, which are functionally limited and independent, only capable of measuring and analyzing one or two thermal properties of a substance. They cannot comprehensively control and analyze the thermal characteristics of a substance in terms of heat flow, mass change, and temperature distribution. Moreover, the sample supply structure of traditional equipment is mainly installed inside the device, occupying internal space and making it difficult to freely change sample types.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A multimodal thermophysical property measuring device, comprising a main housing (1), characterized in that: The inner cavity of the main housing (1) is fixedly connected to a partition plate (21), an infrared temperature measurement component (22), a data acquisition and analysis unit (23), a heat flow detector (24), a thermocouple (218), and a DC power supply (219). A sample inlet (25) is provided on one side of the main housing (1), and a sample outlet (26) is provided on the other side. A heating and insulation component (27) is fixedly connected to the inner cavity of the sample inlet (25) and the sample outlet (26). A micro-element distributed thermal balance analysis module (28) is fixedly connected to the inner cavity of the heating and insulation component (27). A microchannel sample cell (29) is fixedly connected to the inner cavity of the micro-element distributed thermal balance analysis module (28). A microchannel sample cell (29) is fixedly connected to the inner cavity of the micro-element distributed thermal balance analysis module (28). The main housing (1) is fixedly connected to a... A first support plate (210) is fixedly connected to a gas-liquid cylinder (211) and a T-shaped plate (213). A first pipe (212) is fixedly connected to the top of the gas-liquid cylinder (211). A liquid pump (214) is fixedly connected to the top of the T-shaped plate (213). The input end of the liquid pump (214) is fixedly connected to one end of the first pipe (212). The output end of the liquid pump (214) is fixedly connected to a second pipe (215). A flow controller (216) is fixedly connected to one end of the second pipe (215). A sample inlet tube (217) is fixedly connected to one side of the flow controller (216). The sample inlet tube (217) is fixedly connected to the inner cavity of the sample inlet (25).

2. The multimodal thermophysical property measuring device according to claim 1, characterized in that: The top of the main unit housing (1) is fixedly connected to a switch (31), an intelligent control panel (32) and a multi-parameter integrated detector (33), and the inner cavity of the main unit housing (1) is fixedly connected to a multi-segment heating tube (34) and a high-precision thermometer (35).

3. The multimodal thermophysical property measuring device according to claim 1, characterized in that: The top of the main housing (1) is fixedly connected to a micro liquid storage tank (41) and a micro pump (43). The top of the micro liquid storage tank (41) is fixedly connected to a third pipe (42). The third pipe (42) is fixedly connected to the input end of the micro pump (43). The output end of the micro pump (43) is fixedly connected to a fourth pipe (44). One end of the fourth pipe (44) extends into the inner cavity of the main housing (1).

4. The multimodal thermophysical property measuring device according to claim 1, characterized in that: A cylinder (51) is fixedly connected to the top of the partition plate (21), and two cylinders (51) are provided. A high-temperature protective layer (52) is fixedly connected to the inner cavity of the main body housing (1).

5. The multimodal thermophysical property measuring device according to claim 1, characterized in that: The inner cavity of the sample outlet (26) is fixedly connected to a sample outlet tube (61), and a second support plate (62) is fixedly connected to one side of the main housing (1). A collection box (63) is provided on the top of the second support plate (62).

6. The multimodal thermophysical property measuring device according to claim 1, characterized in that: A movable door (71) is movably hinged to one side of the main housing (1) via a hinge, and an observation window (72) is fixedly connected to the inner cavity of the movable door (71).

7. The multimodal thermophysical property measuring device according to claim 1, characterized in that: The inner cavity of the injection tube (217) is fixedly connected to a fifth pipe (81), and a precision valve (82) is fixedly connected to one side of the fifth pipe (81).

8. The multimodal thermophysical property measuring device according to claim 1, characterized in that: The main unit housing (1) is fixedly connected to four corners of the bottom with casters (91), and a heat dissipation vent (92) is provided on one side of the main unit housing (1).

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