A multi-chamber heat transfer contrast demonstration device

Abstract

The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device, and belongs to the technical field of experimental teaching equipment. The application discloses a multi-chamber heat transfer comparison demonstration device.

Description

Technical Field

[0001] This application relates to the field of experimental teaching equipment technology, specifically a multi-chamber heat transfer comparison demonstration device. Background Technology

[0002] Heat transfer is a ubiquitous form of energy transfer in nature, referring to the transfer of heat energy caused by temperature differences. It is mainly achieved through three mechanisms: heat conduction, heat radiation, and heat convection. In the physics teaching system, heat transfer is a core fundamental knowledge point, and related experimental demonstrations are key teaching links to help students understand the principles of heat conduction and grasp the differences in thermal conductivity of different materials.

[0003] Chinese utility model patent CN211375959U discloses a heat transfer teaching demonstration device. It uses a demonstration strip, a ruler, an adjustable demonstration platform, a movable alcohol lamp, a spring-loaded fixing structure, and a cooling tank to safely and intuitively present the heat transfer process, improving the demonstration effect. However, this device uses a movable alcohol lamp to directly heat the demonstration material, and the entire device is exposed to an open environment. This causes heat to easily dissipate rapidly during the heating process, resulting in heat interference between different demonstration parts, making it impossible to construct a stable, independent experimental environment. It also makes it difficult to intuitively and accurately demonstrate the differences in thermal conductivity of different materials, and is easily affected by changes in the external ambient temperature, significantly reducing the accuracy of the experimental results.

[0004] Therefore, this application provides a multi-chamber heat transfer comparison demonstration device to solve the above problems. Utility Model Content

[0005] This application provides a multi-chamber heat transfer comparison demonstration device, which aims to solve the problems mentioned in the background art, such as the existing demonstration devices using alcohol lamps for direct heating in an open environment, which easily leads to heat diffusion and interference between parts, making it impossible to build a stable experimental environment, making it difficult to accurately demonstrate the differences in thermal conductivity of different materials, and being easily affected by the environment, resulting in low experimental accuracy.

[0006] To achieve the above objectives, this application provides the following technical solution: a multi-chamber heat transfer comparison demonstration device, comprising a housing, a heat insulation plate I fixedly installed inside the housing to divide the housing into three chambers, a sealing cover fastened to the top opening of the housing to seal each chamber, a fixing plate fixedly installed in each of the three chambers for positioning and installing copper rods, iron rods and aluminum rods, an electric heating element disposed inside the housing and located below the heat insulation plate I and the fixing plate for heating the copper rods, iron rods and aluminum rods, and a temperature measuring structure disposed on the copper rods, iron rods and aluminum rods for real-time detection and display of temperature; The demonstration device also includes a drive assembly located at the bottom of the housing and connected to the electric heating element, used to move the electric heating element closer to or away from the copper, iron, and aluminum rods. By dividing the housing into three independent cavities with a heat insulation plate and a sealing cover, heat interference between the cavities can be effectively avoided, creating a stable and independent environment for the experiment and improving its accuracy. Simultaneously, the positioning and installation of the copper, iron, and aluminum rods by the fixing plate ensures that the three different heat transfer carriers are on a unified experimental standard. Combined with the real-time temperature detection and display of each metal rod by the temperature measuring structure, the thermal conductivity of different materials is presented synchronously. Differences can be clearly compared simply by repeatedly replacing components. Furthermore, by driving the electric heating element closer to the copper, iron, and aluminum rods through the drive assembly, the electric heating element can be preheated, shortening the waiting time for the overall heating of the cavities and metal rods. This also reduces the inherent differences in power and heating curves between the multiple independent electric heating elements, ensuring the uniformity of heat source conditions and further improving the accuracy of the experiment.

[0007] Preferably, to further improve the accuracy of the experiment, the inner wall of the shell is filled with thermal insulation material, which is rigid polyurethane foam or ceramic fiber cotton. The thermal insulation material, which is rigid polyurethane foam or ceramic fiber cotton, has a low thermal conductivity, which can block the heat exchange between the cavity and the outside world, reduce the interference of ambient temperature on the experiment inside the cavity, and improve the accuracy of the data.

[0008] Preferably, in order to achieve visual observation of the experiment, a high-temperature resistant glass for observation is fixedly installed on one side of each of the three cavities of the shell; the high-temperature resistant glass has both high-temperature resistance and transparency, which can not only withstand the heating environment inside the cavity, but also allow users to directly observe the state of the copper rods, iron rods and aluminum rods inside the cavity, thereby making it easier to intuitively grasp the experimental process.

[0009] Preferably, in order to achieve the insertion and positioning of copper, iron, or aluminum rods, a plug-in sleeve for inserting copper, iron, or aluminum rods is fixedly installed on the fixing plate; the plug-in sleeve provides a suitable mounting hole for the copper, iron, or aluminum rods, which can limit the displacement of the copper, iron, or aluminum rods to ensure that the copper, iron, or aluminum rods are at a uniform experimental standard.

[0010] Preferably, in order to collect and display temperature data, the temperature measuring structure includes temperature sensors fixedly disposed at the ends of the copper rod, iron rod, and aluminum rod away from the electric heating element, and a temperature display fixedly mounted on the housing and electrically connected to the corresponding temperature sensor. By fixing the temperature sensors at the ends of the metal rods away from the electric heating element and capturing the temperature after heat conduction in real time, and then transmitting the data to the temperature display for intuitive presentation via electrical connection, the synchronous quantitative display of temperature data of the copper rod, iron rod, and aluminum rod can be realized, providing an accurate basis for comparing thermal conductivity performance.

[0011] Preferably, to achieve contact between the electric heating element and the copper, iron, and aluminum rods, the driving assembly includes a second heat insulation plate that moves longitudinally within the housing and is located below the first heat insulation plate and the fixed plate; a connecting block fixedly installed at the bottom of the second heat insulation plate; a lead screw that runs longitudinally through the bottom of the housing and is rotatably connected to the housing; and a knob located on the outside of the housing and fixedly connected to one end of the lead screw. The end of the lead screw away from the knob is screwed to the connecting block. The electric heating element is fixedly installed on the second heat insulation plate. By rotating the knob, the lead screw is driven to rotate, which in turn drives the connecting block and the electric heating element on the second heat insulation plate to rise and fall, thereby enabling the heating of the copper, iron, and aluminum rods to start and stop. This ensures that the contact conditions between the heat source and the copper, iron, and aluminum rods are consistent, improving experimental efficiency and accuracy. At the same time, the second heat insulation plate can prevent heat from being conducted downwards.

[0012] This chamber heat transfer comparison demonstration device effectively avoids heat interference between chambers by dividing the shell into three independent chambers with a heat insulation plate and a sealing cover, thus creating a stable and independent environment for the experiment and improving the accuracy of the experiment. This chamber heat transfer comparison demonstration device uses a fixing plate to position and install copper, iron, and aluminum rods, which allows the three different heat transfer carriers to be on a unified experimental standard. Combined with a temperature measuring structure to detect and display the temperature of each metal rod in real time, it realizes the synchronous presentation of the thermal conductivity of different materials. The differences can be clearly compared by repeatedly replacing the parts. The chamber heat transfer comparison demonstration device drives the electric heating element to move closer to the copper rod, iron rod, and aluminum rod through the drive component. This not only allows the electric heating element to be preheated in advance, shortening the waiting time for the overall heating of the chamber and metal rods, but also reduces the inherent differences in power and heating curves between multiple independent electric heating elements, ensuring the consistency of heat source conditions and further improving the accuracy of the experiment. The chamber heat transfer comparison demonstration device is filled with heat-insulating material on the inner wall of the shell, which can block the heat exchange between the chamber and the outside world, reduce the interference of ambient temperature on the experiment inside the chamber, and further improve the accuracy of experimental data. Attached Figure Description

[0013] Figure 1 A schematic diagram of a multi-chamber heat transfer comparative demonstration device; Figure 2 This is a schematic diagram of a multi-chamber heat transfer comparative demonstration device when the sealing cover is open; Figure 3 This is a schematic diagram of the temperature measurement structure in a multi-chamber heat transfer comparative demonstration device. Figure 4 This is a schematic diagram of the exploded structure of the driving component in a multi-chamber heat transfer comparative demonstration device.

[0014] In the picture: 1. Shell; 11. Heat insulation plate 1; 12. Cavity; 13. Sealing cover; 14. High-temperature resistant glass; 2. Fixing plate; 21. Insertion sleeve; 3. Copper rod; 4. Iron rod; 5. Aluminum rods; 6. Electric heating element; 7. Temperature measuring structure; 71. Temperature sensor; 72. Temperature display; 8. Drive assembly; 81. Heat insulation plate II; 82. Connecting block; 83. Lead screw; 84. Knob. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] Example 1 This embodiment provides a multi-chamber heat transfer comparison demonstration device, such as... Figures 1-4 As shown, the demonstration device includes a housing 1, a heat insulation plate 11 fixedly installed inside the housing 1 to divide the housing 1 into three cavities 12, a sealing cover 13 fastened to the top opening of the housing 1 to seal each cavity 12, a fixing plate 2 fixedly installed in each of the three cavities 12 for positioning and installing copper rods 3, iron rods 4 and aluminum rods 5, an electric heating element 6 disposed inside the housing 1 and located below the heat insulation plate 11 and the fixing plate 2 for heating the copper rods 3, iron rods 4 and aluminum rods 5, and a temperature measuring structure 7 disposed on the copper rods 3, iron rods 4 and aluminum rods 5 for real-time detection and display of temperature; the demonstration device also includes a drive assembly 8 disposed at the bottom of the housing 1 and connected to the electric heating element 6 for moving the electric heating element 6 closer to or away from the copper rods 3, iron rods 4 and aluminum rods 5.

[0017] In order to enable visual observation of the experiment, high-temperature resistant glass 14 is fixedly installed on one side of each of the three cavities 12 in the shell 1 for observation. The high-temperature resistant glass 14 has both high-temperature resistance and transparency. It can not only withstand the heating environment inside the cavity 12, but also allow users to directly observe the state of the copper rod 3, iron rod 4 and aluminum rod 5 inside the cavity 12, so as to make it easier to intuitively grasp the experimental process.

[0018] In addition, in order to achieve the insertion and positioning of copper rod 3, iron rod 4, or aluminum rod 5, a plug-in sleeve 21 for inserting copper rod 3, iron rod 4, or aluminum rod 5 is fixedly installed on the fixing plate 2. The plug-in sleeve 21 provides a suitable mounting hole for copper rod 3, iron rod 4, or aluminum rod 5, which can limit the displacement of copper rod 3, iron rod 4, or aluminum rod 5 to ensure that copper rod 3, iron rod 4, or aluminum rod 5 are in a uniform experimental standard. Furthermore, the plug-in sleeve 21 is made of high temperature resistant hard nylon material, which not only has heat insulation and anti-scalding performance, but also can achieve a tight insertion through the hole that matches copper rod 3, iron rod 4, or aluminum rod 5, restricting its longitudinal movement, and can be pulled out with the help of external force.

[0019] In use, first insert the copper rod 3, iron rod 4, and aluminum rod 5 into the corresponding insertion sleeves 21 on the fixing plate 2. The insertion sleeves 21 fasten the three rods to ensure they are positioned at a unified experimental standard and restrict longitudinal movement. Then, fasten the sealing cover 13 to seal the three cavities 12. At the same time, the heat insulation plate 11 divides the space inside the shell 1 into independent areas to avoid heat interference between the cavities 12. Next, operate the drive assembly 8 to move the electric heating element 6 so that it approaches and contacts the bottom of the copper rod 3, iron rod 4, and aluminum rod 5, providing a unified heat source for the three. The electric heating element 6 can then be activated. After preheating, during the heating process of copper rod 3, iron rod 4, and aluminum rod 5 by electric heating element 6, the user can observe the state of copper rod 3, iron rod 4, and aluminum rod 5 inside the cavity through the high-temperature resistant glass 14 on the side of the housing 1 corresponding to the cavity 12. At the same time, the temperature measuring structure 7 can detect and display the temperature changes of copper rod 3, iron rod 4, and aluminum rod 5 in real time and record them for later summary. After the experiment is completed, first operate the drive component 8 to move the electric heating element 6 away from copper rod 3, iron rod 4, and aluminum rod 5, and then open the sealing cover 13 to pull out copper rod 3, iron rod 4, and aluminum rod 5 from the plug sleeve 21, thus completing the entire demonstration process.

[0020] Specifically, the temperature measuring structure 7 includes temperature sensors 71 that are fixedly disposed at the ends of the copper rod 3, iron rod 4 and aluminum rod 5 away from the electric heating element 6, and a temperature display 72 that is fixedly disposed on the housing 1 and electrically connected to the corresponding temperature sensor 71. During the heating process of copper rod 3, iron rod 4, and aluminum rod 5 by electric heating element 6, temperature sensor 71 can accurately capture the temperature changes at the heat-conducting ends of copper rod 3, iron rod 4, and aluminum rod 5. Since temperature sensor 71 and temperature display 72 on housing 1 are electrically connected to establish a signal transmission path, temperature sensor 71 will convert the real-time temperature data at that location into an electrical signal and transmit it to the corresponding temperature display 72 through the connection line. Then, temperature display 72 will convert the electrical signal into an intuitive temperature value and display it, so that users can simultaneously read and record the real-time temperature of copper rod 3, iron rod 4, and aluminum rod 5 to summarize the temperature change trend, thereby providing accurate quantitative basis for comparing the heat transfer performance of metal rods of different materials. Among them, the three temperature sensors 71 are respectively bound to copper rod 3, iron rod 4, and aluminum rod 5 by high-temperature resistant heat-insulating silicone tape. The silicone tape can not only prevent scalding and insulate, but also ensure that the temperature sensor 71 is stably fixed and not affected by the high temperature of copper rod 3, iron rod 4, and aluminum rod 5.

[0021] Furthermore, the drive assembly 8 includes a second heat insulation plate 81 that moves longitudinally within the housing 1 and is located below the first heat insulation plate 11 and the fixed plate 2, a connecting block 82 fixedly installed at the bottom of the second heat insulation plate 81, a lead screw 83 that runs longitudinally through the bottom of the housing 1 and is rotatably connected to the housing 1, and a knob 84 that is located on the outside of the housing 1 and fixedly connected to one end of the lead screw 83. The end of the lead screw 83 away from the knob 84 is screwed to the connecting block 82. The electric heating element 6 is fixedly installed on the second heat insulation plate 81. When the electric heating element 6 needs to be driven to approach the copper rod 3, iron rod 4, and aluminum rod 5 for heating, the knob 84 is rotated to drive the lead screw 83 to rotate synchronously. Since the lead screw 83 is screwed to the connecting block 82 and the lead screw 83 rotates on the housing 1, the rotating lead screw 83 will convert the rotational motion into the vertical upward motion of the connecting block 82. At this time, the connecting block 82 will synchronously drive the heat insulation plate 81 and the electric heating element 6 fixed thereon to rise synchronously until the electric heating element 6 contacts the bottom of the copper rod 3, iron rod 4, and aluminum rod 5. Conversely, when it is necessary to stop heating or move the electric heating element 6 away from the metal rods, the knob 84 is rotated in the opposite direction. Then, the lead screw 83 rotates in the opposite direction, which will cause the connecting block 82 to drive the heat insulation plate 81 and the electric heating element 6 to descend vertically. At the same time, the heat insulation plate 81 can prevent the heat of the electric heating element 6 from being conducted downward to other parts of the drive assembly 8.

[0022] It is worth noting that both heat insulation plate 11 and heat insulation plate 81 are made of high-temperature resistant ceramic fiber board. This material has a low thermal conductivity and can effectively block heat transfer, thus achieving heat insulation between the cavities 12 and between the cavities 12 and the drive assembly 8.

[0023] Example 2 Unlike Example 1, to further improve the accuracy of the experiment, the inner wall of the shell 1 is filled with thermal insulation material, which is rigid polyurethane foam or ceramic fiber cotton. By filling the inner wall of the shell 1 with thermal insulation material, which is rigid polyurethane foam or ceramic fiber cotton, its extremely low thermal conductivity can effectively block the heat in the cavity 12 from being transferred to the outside of the shell 1. At the same time, the heat insulation plate 11, together with the thermal insulation material, further reduces the heat exchange between the cavities 12, reduces the interference of the external ambient temperature on the temperature inside the cavity 12, and ensures that the heat generated by the electric heating element 6 is mainly used for the heat transfer of the copper rod 3, iron rod 4, and aluminum rod 5, reducing experimental errors caused by heat loss or environmental influences, and further improving the accuracy of the experiment.

[0024] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A multi-chamber heat transfer comparison demonstration device, characterized in that: The device includes a housing (1), a heat insulation plate (11) fixedly installed inside the housing (1) to divide the housing (1) into three cavities (12), a sealing cover (13) fastened to the top opening of the housing (1) to seal each cavity (12), a fixing plate (2) fixedly installed in the three cavities (12) to position and install copper rods (3), iron rods (4) and aluminum rods (5), an electric heating element (6) disposed inside the housing (1) and located below the heat insulation plate (11) and the fixing plate (2) for heating the copper rods (3), iron rods (4) and aluminum rods (5), and a temperature measuring structure (7) disposed on the copper rods (3), iron rods (4) and aluminum rods (5) for real-time detection and display of temperature. The demonstration device also includes a drive assembly (8) disposed at the bottom of the housing (1) and connected to the electric heating element (6) for moving the electric heating element (6) closer to or away from the copper rod (3), iron rod (4) and aluminum rod (5).

2. The multi-chamber heat transfer comparison demonstration device according to claim 1, characterized in that: The inner wall of the shell (1) is filled with thermal insulation material, which is rigid polyurethane foam or ceramic fiber cotton.

3. The multi-chamber heat transfer comparison demonstration device according to claim 2, characterized in that: The shell (1) is fixedly installed with high-temperature resistant glass (14) for observation on one side of each of the three cavities (12).

4. The multi-chamber heat transfer comparison demonstration device according to claim 1, characterized in that: The fixing plate (2) is fixedly installed with a plug sleeve (21) for inserting copper rod (3), iron rod (4) or aluminum rod (5).

5. The multi-chamber heat transfer comparison demonstration device according to claim 1, characterized in that: The temperature measuring structure (7) includes a temperature sensor (71) fixedly disposed at the end of the copper rod (3), iron rod (4) and aluminum rod (5) away from the electric heating element (6), and a temperature display (72) fixedly mounted on the housing (1) and electrically connected to the corresponding temperature sensor (71).

6. The multi-chamber heat transfer comparison demonstration device according to claim 1, characterized in that: The drive assembly (8) includes a second heat insulation plate (81) that moves longitudinally within the housing (1) and is located below the first heat insulation plate (11) and the fixed plate (2), a connecting block (82) fixedly installed at the bottom of the second heat insulation plate (81), a lead screw (83) that runs longitudinally through the bottom of the housing (1) and is rotatably connected to the housing (1), and a knob (84) located on the outside of the housing (1) and fixedly connected to one end of the lead screw (83). The end of the lead screw (83) away from the knob (84) is screwed to the connecting block (82), and the electric heating element (6) is fixedly installed on the second heat insulation plate (81).

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