Thermal radiation demonstration device

Abstract

The utility model discloses a thermal radiation demonstration device. Same heat radiation layers are arranged on the two sides of the heating module respectively. The two light-transmitting plates are arranged on the two sides of the heating module and directly face the heat radiation layer, one light-transmitting plate is a temperature-induced phase change plate, and the other light-transmitting plate is a non-temperature-induced phase change plate with fixed light transmittance; the light transmittance of the temperature-induced phase change plate is close to the light transmittance of the non-temperature-induced phase change plate when phase change does not occur, and the light transmittance of the temperature-induced phase change plate after phase change is obviously lower than the light transmittance of the non-temperature-induced phase change plate; the two thermal radiation heat absorption bottles are the same, are respectively arranged on the outer sides of the two light-transmitting plates and are opposite to the two light-transmitting plates; the two ends of the special-shaped pipe are connected with the two heat radiation heat absorption bottles, and a colored liquid column is arranged in the special-shaped pipe. According to the utility model, the basic principle of thermal radiation and the interaction rule of the thermal radiation and a medium during propagation can be visually and clearly displayed, and the characteristic rule of a temperature-induced phase change plate material can be researched.

Description

Technical Field

[0001] This utility model relates to the field of teaching experimental instruments, specifically to a thermal radiation demonstration device. Background Technology

[0002] While the laws governing thermal radiation and absorption are widely understood, experimental equipment that can intuitively and effectively demonstrate these principles remains scarce in teaching practice. Currently available thermal radiation and absorption demonstrators can demonstrate the basic principles of thermal radiation, but they fall short in showing the specific laws governing the interaction between thermal radiation and the medium during propagation, especially when it comes to the changes that occur during this interaction. In particular, these devices often fail to intuitively demonstrate the impact of temperature-induced phase transitions on the thermal radiation properties of materials, limiting students' in-depth understanding and further exploration of these key concepts. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a thermal radiation demonstration device with a simple structure that can intuitively and clearly demonstrate the basic principles of thermal radiation and the laws governing its interaction with the medium during propagation. In particular, it provides a direct demonstration of the changes in the interaction between thermal radiation and the medium, and also enables the study of the material properties of temperature-induced phase change plates.

[0004] The thermal radiation demonstration device according to an embodiment of the present invention includes:

[0005] A heating module, wherein identical heat radiation layers are provided on both sides of the heating module;

[0006] Two light-transmitting plates are disposed on both sides of the heating module and directly opposite the heat radiation layers on both sides of the heating module. The distance between the two light-transmitting plates and the heating module is equal. One of the light-transmitting plates is a thermo-induced phase change plate, and the other light-transmitting plate is a non-thermo-induced phase change plate with fixed light transmittance. The light transmittance of the thermo-induced phase change plate before phase change is close to that of the non-thermo-induced phase change plate. The light transmittance of the thermo-induced phase change plate after phase change is significantly lower than that of the non-thermo-induced phase change plate.

[0007] Two identical thermal radiation absorbing bottles are arranged on the outside of the two light-transmitting plates and directly opposite each other. The distance between the two thermal radiation absorbing bottles and the heating module is equal.

[0008] An irregularly shaped tube is provided, with its two ends respectively connected to two thermal radiation absorbing bottles to form a closed system. The tube contains a colored liquid column and gas columns located at both ends of the colored liquid column. The gas column located at one end of the colored liquid column is defined as the first gas column, and the space containing the first gas column is connected to the thermal radiation absorbing bottle adjacent to the non-temperature-induced phase change plate. The gas column located at the other end of the colored liquid column is defined as the second gas column, and the space containing the second gas column is connected to the thermal radiation absorbing bottle adjacent to the temperature-induced phase change plate.

[0009] The demonstration operation process of the thermal radiation demonstration device of this utility model embodiment is as follows: First, make the two ends of the red liquid column in the irregular tube the same height; then, start the heating module to generate heat; next, observe the position change of the liquid surface at both ends of the colored liquid column: when the temperature of the thermo-induced phase change plate is less than the critical phase change temperature, the end of the colored liquid column near the second gas column is slightly higher than the end near the first gas column; when the temperature of the thermo-induced phase change plate exceeds the critical phase change temperature, the end of the colored liquid column near the second gas column is significantly higher than the end near the first gas column, that is, the difference in liquid surface at both ends of the colored liquid column is obvious; then, swap the positions of the two light-transmitting plates, wait a moment, and you can see that the liquid surface height at both ends of the colored liquid column has swapped; finally, turn off the heating module to restore the thermal radiation demonstration device of this utility model embodiment to its original state.

[0010] The thermal radiation demonstration principle of this utility model embodiment of the thermal radiation demonstration device is as follows: When the heating module is started, the heat generated by the heating module is transferred to the same thermal radiation layers on both sides of the heating module through thermal radiation, and then the thermal radiation layers on both sides radiate heat to the corresponding two thermal radiation absorber bottles. When the temperature-induced phase change plate does not undergo a phase change, the light transmittance of the temperature-induced phase change plate is close to that of the non-temperature-induced phase change plate. At this time, the light transmittance of the temperature-induced phase change plate is close to that of the non-temperature-induced phase change plate. That is, the heat transferred by the temperature-induced phase change plate from one side to the other side is close to that transferred by the non-temperature-induced phase change plate from one side to the other side. Therefore, the radiated heat received by the two thermal radiation absorber bottles is close. At this time, the movement of the colored liquid column is not obvious, and the difference between the liquid levels at both ends of the colored liquid column is small and close to being flush. When the temperature of the thermo-induced phase change plate rises above the critical phase change temperature, the thermo-induced phase change plate undergoes a phase change, resulting in a significant decrease in its transmittance, which is significantly lower than that of the non-thermo-induced phase change plate. This means that the thermo-induced phase change plate transfers significantly less heat from one side to the other than the non-thermo-induced phase change plate. Consequently, the heat received by the heat-absorbing bottle adjacent to the thermo-induced phase change plate is significantly less than that received by the non-thermo-induced phase change plate, leading to a significantly higher pressure in the first gas column than in the second gas column. This causes the colored liquid column to shift noticeably towards the second gas column, resulting in a significant difference in liquid level between the two ends of the colored liquid column. For example, when the irregularly shaped tube is arranged vertically, the end of the colored liquid column near the second gas column may be significantly higher than the end near the first gas column. This significant difference in the colored liquid column's height directly reflects the difference in the transmittance of thermal radiation through the two light-transmitting plates.

[0011] During the demonstration, by comparing the effects of the two transparent plates on thermal radiation, the change in thermal radiation transmittance of the thermo-induced phase change plate at different temperatures can be clearly shown. When the temperature of the thermo-induced phase change plate is below the critical phase change temperature, its thermal radiation transmittance is high, close to that of the non-thermo-induced phase change plate. Therefore, the liquid levels at both ends of the colored liquid column are nearly flush. Once the temperature of the thermo-induced phase change plate exceeds the critical phase change temperature, its transmitted light decreases, leading to a significant increase in the difference in liquid levels at both ends of the colored liquid column, demonstrating a significant enhancement in thermal radiation absorption by the thermo-induced phase change plate. Therefore, the thermal radiation demonstration device of this embodiment not only allows for an intuitive understanding of the basic principles of thermal radiation but also provides a direct understanding of the interaction between thermal radiation propagation and the medium. Furthermore, it facilitates the study of the material properties of thermo-induced phase change plates.

[0012] The thermal radiation demonstration device according to this utility model embodiment has the following advantages: By demonstrating the interaction between thermal radiation and the medium during its generation and propagation, and by showcasing the absorption and transmission characteristics of thermal radiation through light-transmitting plates with different transmittance, it intuitively and clearly demonstrates the basic principles of thermal radiation and the laws governing its interaction with the medium during propagation. Through experimental operation, it is possible to observe how thermal radiation affects the difference in liquid levels at both ends of a colored liquid column, thereby understanding the response of different materials to thermal radiation. Furthermore, it is beneficial for studying the material properties of temperature-induced phase change plates. In summary, the thermal radiation demonstration device of this utility model embodiment has a simple structure, intuitively demonstrates the change process during the interaction between thermal radiation and the medium, and can simply, intuitively, and clearly demonstrate the basic principles of thermal radiation and the laws governing its interaction with the medium during propagation. It effectively combines the laws governing the interaction between thermal radiation and the medium during propagation with the concept of temperature-induced phase change, helping people to deeply understand related physical phenomena and possessing high potential for widespread application.

[0013] In some embodiments, two temperature detectors are also included, each used to detect the temperature of one of the two light-transmitting plates respectively.

[0014] In some embodiments, a temperature regulator is further included for adjusting the heating temperature of the heating module.

[0015] In some embodiments, a relay is also included, which is used to disconnect when the actual heating temperature of the heating module is greater than the set temperature of the temperature regulator.

[0016] In some embodiments, a heating rate regulator is further included, which is used to adjust the heating rate of the heating module.

[0017] In some embodiments, a support module is also included, which supports the irregular tube, the thermal radiation absorbing bottle, the light-transmitting plate, and the heating module.

[0018] In some embodiments, the support module includes a bracket for detachably supporting the light-transmitting panel.

[0019] In some embodiments, the thermo-induced phase change plate is a thermo-induced phase change glass plate, and the non-thermo-induced phase change plate is an ordinary glass plate.

[0020] In some embodiments, the temperature-induced phase change glass plate is a vanadium dioxide glass plate.

[0021] In some embodiments, the heat radiation layer is a white metal plate or a white metal coating.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of a thermal radiation demonstration device according to an embodiment of the present invention.

[0025] Figure label:

[0026] Heating module 1; thermal radiation layer 101; light-transmitting plate 2; thermotropic phase change plate 201; non-thermotropic phase change plate 202; thermal radiation heat absorption bottle 3; irregularly shaped tube 4; colored liquid column 401; valve 402; temperature detector 5; temperature regulator 6; relay 7; heating rate regulator 8; support module 9; bracket 901. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] The following is combined Figure 1 The following describes the thermal radiation demonstration device of the present invention.

[0029] like Figure 1 As shown, the thermal radiation demonstration device according to an embodiment of the present invention includes a heating module 1, two light-transmitting plates 2, two thermal radiation absorbing bottles 3, and an irregularly shaped tube 4.

[0030] Specifically, the heating module 1 has identical heat radiation layers 101 on both sides. The heating module 1 generates heat, and the heat generated by the heating module 1 is reflected outward through the heat radiation layers 101. Since the heat radiation layers 101 on both sides of the heating module 1 are identical, the heat reflected outward by the heat radiation layers 101 is basically the same. In detail, the heating module 1 includes an electric heating element, a container, and two heat radiation layers 101. The electric heating element, such as an electric heating plate, electric heating wire, or electric heating tube, is located inside the container. The container can be a rectangular container. The two identical heat radiation layers 101 are fixed on two sides of the container. Preferably, the two heat radiation layers 101 can be symmetrically fixed on two opposite sides of the container. When the electric heating element is energized, it generates heat, and the heat radiation layers 101 can reflect the heat generated by the electric heating element outward.

[0031] Two light-transmitting plates 2 are disposed on both sides of the heating module 1 and directly opposite the heat radiation layers 101 on both sides of the heating module 1. The distance between the two light-transmitting plates 2 and the heating module 1 is equal. In this way, the heat reflected from the heat radiation layers 101 on both sides of the heating module 1 to one side of the two light-transmitting plates 2 is basically the same. Both light-transmitting plates 2 have the characteristics of absorbing heat radiation and transmitting heat. One of the light-transmitting plates 2 is a temperature-induced phase change plate 201, and the other light-transmitting plate 2 is a non-temperature-induced phase change plate 202 with a fixed transmittance. That is, the transmittance of the two light-transmitting plates 2 is different. The transmittance of the temperature-induced phase change plate 201 when no phase change occurs is close to that of the non-temperature-induced phase change plate 202. At this point, the light transmittance of the thermo-induced phase change plate 201 is close to that of the non-thermo-induced phase change plate 202. That is, the amount of heat transferred from one side of the thermo-induced phase change plate 201 to the other side is close to that transferred from one side of the non-thermo-induced phase change plate 202 to the other side. The light transmittance of the thermo-induced phase change plate 201 after the phase change is significantly lower than that of the non-thermo-induced phase change plate 202. At this point, the light transmittance of the thermo-induced phase change plate 201 is significantly lower than that of the non-thermo-induced phase change plate 202. That is, the amount of heat transferred from one side of the thermo-induced phase change plate 201 to the other side is significantly less than that transferred from one side of the non-thermo-induced phase change plate 202 to the other side.

[0032] The two heat-absorbing bottles 3 are identical and are respectively positioned outside the two light-transmitting plates 2, directly opposite each other. The distance between the two heat-absorbing bottles 3 and the heating module 1 is equal. By setting up two heat-absorbing bottles 3, they can respectively receive the heat radiated from the heating module 1 transmitted by the two light-transmitting plates 2. When the temperature-induced phase change plate 201 has not undergone a phase change, the heat received by the two heat-absorbing bottles 3 is similar. When the temperature-induced phase change plate 201 undergoes a phase change, the heat received by the heat-absorbing bottle 3 adjacent to the temperature-induced phase change plate 201 is significantly less than the heat received by the heat-absorbing bottle 3 adjacent to the non-temperature-induced phase change plate 202.

[0033] The two ends of the irregularly shaped tube 4 are respectively connected to two thermal radiation absorbing bottles 3 to form a closed system. The irregularly shaped tube 4 contains a colored liquid column 401 and gas columns located at both ends of the colored liquid column 401 to demonstrate the effect of thermal radiation. For the sake of description below, the gas column located at one end of the colored liquid column 401 is defined as the first gas column. The space where the first gas column is located is connected to the thermal radiation absorbing bottle 3 adjacent to the non-temperature-induced phase change plate 202. The gas column located at the other end of the colored liquid column 401 is defined as the second gas column. The space where the second gas column is located is connected to the thermal radiation absorbing bottle 3 adjacent to the temperature-induced phase change plate 201. Understandably, during the experimental demonstration, the liquid levels at both ends of the colored liquid column 401 can be aligned first. For example, when the irregular tube 4 is arranged vertically, the liquid levels at both ends of the colored liquid column 401 can be aligned. Then, when the heating module 1 is activated, the heat generated by the heating module 1 is reflected through the thermal radiation layer 101 to the two light-transmitting plates 2, and the heat is transferred and radiated to the two thermal radiation absorber bottles 3 through the two light-transmitting plates 2. When the temperature-induced phase change plate 201 has not undergone a phase change, the thermal radiation heat received by the two thermal radiation absorber bottles 3 is close. At this time, the pressure of the gas columns (i.e., the first gas column and the second gas column) at both ends of the colored liquid column 401 is close, and the two ends of the colored liquid column 401... The liquid levels at both ends are small and nearly flush. When the temperature of the temperature-induced phase change plate 201 rises above the critical phase change temperature, a phase change occurs. The heat received by the heat-absorbing bottle 3 adjacent to the temperature-induced phase change plate 201 is significantly less than the heat received by the heat-absorbing bottle 3 adjacent to the non-temperature-induced phase change plate 202. Therefore, the pressure of the first gas column is significantly greater than the pressure of the second gas column, causing the colored liquid column 401 to move significantly towards the second gas column. The liquid levels at both ends of the colored liquid column 401 are noticeably uneven. For example, when the irregularly shaped tube 4 is arranged vertically, the liquid level at the end of the colored liquid column 401 closer to the second gas column is significantly higher than the liquid level at the end closer to the first gas column. In other words, the irregularly shaped tube 4 is mainly used to visually demonstrate the basic principles of thermal radiation and the effect of the interaction between thermal radiation and the medium during propagation.

[0034] The demonstration operation process of the thermal radiation demonstration device of this utility model embodiment is as follows: First, make the two ends of the red liquid column of the irregular tube 4 the same height; then, start the heating module 1 to generate heat; next, observe the position change of the liquid surface at both ends of the colored liquid column 401: when the temperature of the temperature-induced phase change plate 201 is less than the critical phase change temperature, the end of the colored liquid column 401 near the second gas column is slightly higher than the end near the first gas column; when the temperature of the temperature-induced phase change plate 201 exceeds the critical phase change temperature, the end of the colored liquid column 401 near the second gas column is significantly higher than the end near the first gas column, that is, the difference in liquid surface at both ends of the colored liquid column 401 is obvious; then, swap the positions of the two light-transmitting plates 2, and after a short while, you can see that the liquid surface height at both ends of the colored liquid column 401 has swapped; finally, turn off the heating module 1 to restore the thermal radiation demonstration device of this utility model embodiment to its original state.

[0035] The thermal radiation demonstration principle of the thermal radiation demonstration device in this embodiment of the utility model is as follows: When the heating module 1 is started, the heat generated by the heating module 1 is transferred to the same thermal radiation layer 101 on both sides of the heating module 1 through thermal radiation, and then the thermal radiation layer 101 on both sides radiates heat to the two corresponding thermal radiation absorbing bottles 3 respectively. When the temperature-induced phase change plate 201 does not undergo a phase change, the light transmittance of the temperature-induced phase change plate 201 is close to that of the non-temperature-induced phase change plate 202. At this time, the light transmittance of the temperature-induced phase change plate 201 is close to that of the non-temperature-induced phase change plate 202. That is, the heat transferred from one side of the temperature-induced phase change plate 201 to the other side is close to that transferred from one side of the non-temperature-induced phase change plate 202 to the other side. Therefore, the radiated heat received by the two thermal radiation absorbing bottles 3 is close. At this time, the movement of the colored liquid column 401 is not obvious, and the difference between the liquid levels at both ends of the colored liquid column 401 is small and close to being flush. When the temperature of the thermo-induced phase change plate 201 rises above the critical temperature for phase change, the thermo-induced phase change plate 201 undergoes a phase change, and the light transmittance of the thermo-induced phase change plate 201 decreases significantly, becoming significantly lower than that of the non-thermo-induced phase change plate 202. That is, the amount of heat transferred from one side of the thermo-induced phase change plate 201 to the other side is significantly less than that transferred from one side of the non-thermo-induced phase change plate 202 to the other side. Therefore, the heat received by the thermal radiation absorbing bottle 3 adjacent to the thermo-induced phase change plate 201 is significantly less than that received by the thermal radiation absorbing bottle 3 adjacent to the non-thermo-induced phase change plate 202. Consequently, the pressure of the first gas column is significantly greater than that of the second gas column, causing the colored liquid column 401 to move significantly toward the second gas column. The difference in liquid level between the two ends of the colored liquid column 401 becomes significant. For example, when the irregular tube 4 is arranged vertically, the colored liquid column 401 can be made to be significantly higher at the end near the second gas column than at the end near the first gas column. The significant difference between the two ends of the colored liquid column 401 directly reflects the difference in the transmittance of thermal radiation on the two light-transmitting plates.

[0036] During the demonstration, by comparing the effects of the two transparent plates 2 on thermal radiation, the change in thermal radiation transmittance of the temperature-induced phase change plate 201 at different temperatures can be clearly shown. When the temperature of the temperature-induced phase change plate 201 is below the critical phase change temperature, the thermal radiation transmittance of the temperature-induced phase change plate 201 is relatively high, close to that of the non-temperature-induced phase change plate 202. Therefore, the liquid surfaces at both ends of the colored liquid column 401 are nearly flush. Once the temperature of the temperature-induced phase change plate 201 exceeds the critical phase change temperature, its transmitted light decreases, resulting in a significant increase in the difference in liquid surface area between the two ends of the colored liquid column 401, showing a significant enhancement in thermal radiation absorption by the temperature-induced phase change plate 201. Therefore, the thermal radiation demonstration device of this embodiment not only allows for an intuitive understanding of the basic principles of thermal radiation but also provides an intuitive understanding of the interaction between thermal radiation propagation and the medium. Furthermore, it is beneficial for studying the material properties of the temperature-induced phase change plate 201.

[0037] The thermal radiation demonstration device according to this embodiment of the present invention has the following advantages: It clearly and intuitively demonstrates the basic principles of thermal radiation and the laws governing its interaction with the medium during propagation by showing the interaction between thermal radiation and the medium during its propagation, as well as the absorption and transmission characteristics of thermal radiation through light-transmitting plates 2 with different transmittance. Through experimental operation, it is possible to observe how thermal radiation affects the difference in liquid surface area at both ends of the colored liquid column 401, thereby understanding the response of different materials to thermal radiation. Furthermore, it is beneficial for studying the material properties of the temperature-induced phase change plate 201. In summary, the thermal radiation demonstration device of this embodiment of the present invention has a simple structure and can clearly and intuitively demonstrate the basic principles of thermal radiation and the laws governing its interaction with the medium during propagation. It effectively combines the laws governing the interaction between thermal radiation and the medium during propagation with the concept of temperature-induced phase change, helping people to deeply understand related physical phenomena and possessing high promotional value.

[0038] In some embodiments, two temperature detectors 5 are also included, which are used to detect the temperature of the two light-transmitting plates 2 respectively. This is beneficial for intuitively and clearly demonstrating the basic principles of thermal radiation and the law of interaction with the medium during propagation. At the same time, it is also beneficial for studying the material properties of the temperature-induced phase change plate 201.

[0039] In some embodiments, both temperature detectors 5 are thermocouples, which can accurately measure the temperature of the two light-transmitting plates 2 in real time.

[0040] In some embodiments, a temperature regulator 6 is further included. The temperature regulator 6 is electrically connected to the heating module 1 and is used to adjust the heating temperature of the heating module 1. The heating temperature of the heating module 1 can be easily set by the temperature regulator 6, so that the actual heating temperature of the heating module 1 does not exceed the set temperature. This facilitates the control of the actual heating temperature of the heating module 1, and thus facilitates the control of the effect of the actual heating temperature of the heating module 1 on the interaction between the heating module 1 and the medium during heat radiation propagation.

[0041] In some embodiments, a relay 7 is also included, which is used to disconnect when the actual heating temperature of the heating module 1 is greater than the set temperature of the temperature regulator 6, thus facilitating the control of the heating temperature of the heating module 1.

[0042] In some embodiments, a heating rate regulator 8 is also included, which is used to adjust the heating rate of the heating module 1, which is beneficial to demonstrating the effect of the heating rate on the interaction between the heating rate and the medium during the propagation of thermal radiation.

[0043] In some embodiments, the system further includes a support module 9, which supports the irregular tube 4, the thermal radiation absorbing bottle 3, the light-transmitting plate 2, and the heating module 1. That is, the irregular tube 4, the thermal radiation absorbing bottle 3, the light-transmitting plate 2, and the heating module 1 are all mounted on the support module 9.

[0044] In some embodiments, the support module 9 includes a bracket 901 for detachably supporting the light-transmitting plate 2. This allows for easy interchange of the positions of the two light-transmitting plates 2 to facilitate the demonstration of heat radiation, and also allows for the replacement of light-transmitting plates 2 with different light transmittance.

[0045] In some embodiments, the thermochromic phase change plate 201 is a thermochromic phase change glass plate, and the non-thermochromic phase change plate 202 is a regular glass plate. By using thermochromic phase change glass plates and regular glass plates as light-transmitting plates 2 with different transmittances, it is beneficial to demonstrate the basic principles of thermal radiation and the laws governing its interaction with the medium during propagation. It also allows for understanding the responses of different materials to thermal radiation and facilitates research on the material properties of thermochromic phase change glass plates.

[0046] In some embodiments, the temperature-induced phase change glass plate is a vanadium dioxide glass plate, which is beneficial for demonstrating the basic principles of thermal radiation and the laws governing its interaction with the medium during propagation. It also allows for understanding the responses of different materials to thermal radiation and facilitates research on the material properties of the temperature-induced phase change glass plate.

[0047] In some embodiments, the heat radiation layer 101 is a white metal plate or a white metal coating, which can effectively reflect the heat generated by the heating module 1.

[0048] In some embodiments, the white metal plate is a white aluminum plate, which can effectively reflect the heat generated by the heating module 1.

[0049] In some embodiments, the heat radiation absorbing bottle 3 is a ferrous metal bottle that can effectively receive heat radiation.

[0050] In some embodiments, a scale module (not shown in the figure) is also included. The scale module is disposed on the support module 9 to facilitate displaying the position of the liquid surface at both ends of the colored liquid column 401 in the shaped tube 4, accurately measuring the position change of the liquid surface at both ends of the colored liquid column 401 and clearly displaying the measurement results.

[0051] In some embodiments, the irregularly shaped tube further includes a valve 402, which is disposed between the two ends of the irregularly shaped tube 4. When the valve 402 is closed, the spaces corresponding to the gas columns on both sides of the colored liquid column 401 are separated; when the valve 402 is open, the spaces corresponding to the gas columns on both ends of the colored liquid column 401 are connected. By setting the valve 402, the thermal radiation demonstration operation can be facilitated. For example, before preparing for the experimental demonstration, by opening the valve 402, the spaces corresponding to the gas columns on both ends of the colored liquid column 401 are connected, thereby making the liquid surfaces on both ends of the colored liquid column 401 level. Then, the valve 402 is closed to ensure the accuracy of the thermal radiation effect after the heating module 1 is subsequently started.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A thermal radiation demonstration device, characterized in that, include: A heating module, wherein identical heat radiation layers are provided on both sides of the heating module; Two light-transmitting plates are disposed on both sides of the heating module and directly opposite the heat radiation layers on both sides of the heating module. The distance between the two light-transmitting plates and the heating module is equal. One of the light-transmitting plates is a thermo-induced phase change plate, and the other light-transmitting plate is a non-thermo-induced phase change plate with fixed light transmittance. The light transmittance of the thermo-induced phase change plate before phase change is close to that of the non-thermo-induced phase change plate. The light transmittance of the thermo-induced phase change plate after phase change is significantly lower than that of the non-thermo-induced phase change plate. Two identical thermal radiation absorbing bottles are arranged on the outside of the two light-transmitting plates and directly opposite each other. The distance between the two thermal radiation absorbing bottles and the heating module is equal. The irregularly shaped tube is connected at both ends to the two thermal radiation absorbing bottles respectively, so as to form a closed system with the two thermal radiation absorbing bottles. The irregularly shaped tube is provided with a colored liquid column and gas columns located at both ends of the colored liquid column.

2. The thermal radiation demonstration device according to claim 1, characterized in that, It also includes two temperature detectors, which are used to detect the temperature of the two light-transmitting plates respectively.

3. The thermal radiation demonstration device according to claim 1, characterized in that, It also includes a temperature regulator for adjusting the heating temperature of the heating module.

4. The thermal radiation demonstration device according to claim 3, characterized in that, It also includes a relay, which is used to disconnect when the actual heating temperature of the heating module is greater than the set temperature of the temperature regulator.

5. The thermal radiation demonstration device according to claim 1, characterized in that, It also includes a heating rate regulator, which is used to adjust the heating rate of the heating module.

6. The thermal radiation demonstration device according to claim 1, characterized in that, It also includes a support module that supports the irregular tube, the thermal radiation absorbing bottle, the light-transmitting plate, and the heating module.

7. The thermal radiation demonstration device according to claim 6, characterized in that, The support module includes a bracket for detachably supporting the light-transmitting plate.

8. The thermal radiation demonstration device according to any one of claims 1-7, characterized in that, The thermo-phase change plate is a thermo-phase change glass plate, and the non-thermo-phase change plate is an ordinary glass plate.

9. The thermal radiation demonstration device according to claim 8, characterized in that, The temperature-induced phase change glass plate is a vanadium dioxide glass plate.

10. The thermal radiation demonstration device according to any one of claims 1-7, characterized in that, The heat radiation layer is a white metal plate or a white metal coating.

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