A dynamic visualization demonstration device for thermal circulation

Abstract

The present application relates to the technical field of teaching experiment device, and discloses a dynamic visual demonstration device for thermal circulation, comprising: a transparent box body, the transparent box body is in the cuboid structure, the bottom is provided with a base, and the upper part is provided with a top cover two baffle, which is arranged in the transparent box body, and the transparent box body is divided into the first experimental area, the second experimental area and the third experimental area arranged in the horizontal direction; a first heating group, the present application utilizes the baffle partition and limits the ventilation channel, restrains the cold and hot airflow in the box body, avoids the disorderly mixing of airflow, clearly displays the complete closed path of thermal circulation, and improves the demonstration intuitiveness. A plurality of synchronous control experiments are set up, a comparison benchmark is established, external variable interference is excluded, and the principle of temperature difference driven circulation is convenient to verify. The optional connecting and locking structure and sealing gasket are adopted, which is convenient to disassemble and assemble, reliable in sealing, ensures the accuracy and repeatability of the experiment, simple in structure and easy to operate, and is suitable for geography classroom teaching demonstration.

Description

Technical Field

[0001] This invention relates to the field of teaching experimental device technology, specifically a dynamic visualization demonstration device for thermal circulation. Background Technology

[0002] Thermal circulation is a fundamental form of atmospheric motion caused by uneven heating of the Earth's surface. It is a core principle in high school geography courses for explaining geographical phenomena such as weather changes, climate formation, and global warming. However, the formation of thermal circulation involves a continuous dynamic cycle of vertical and horizontal air movement driven by temperature gradients. Its evolution has significant spatial and temporal characteristics. In reality, air movement is slow and invisible, making it difficult for learners to establish intuitive understanding through direct observation.

[0003] Currently, some demonstration devices have been developed to aid in teaching the concept of thermal circulation. These devices typically employ a transparent enclosure structure, creating a temperature difference by placing heating and cooling elements inside the enclosure, and displaying the airflow trajectory using media such as smoke, vapor, or tracer particles. However, these existing devices still have the following shortcomings in practical teaching applications:

[0004] The existing device lacks an effective partitioning and isolation structure between the heating and cooling areas. Hot and cold air are prone to disorderly mixing inside the chamber, resulting in a chaotic circulation path. Learners find it difficult to clearly identify the complete "rise-level-sink-level" closed loop trajectory, and the visual demonstration effect is poor.

[0005] Most existing devices only have a single experimental group and do not have a simultaneous control observation area. Since the formation process of thermal circulation is affected by many variables such as ambient temperature and heating power, the lack of a control group will result in a lack of comparative benchmarks for experimental results, making it difficult for learners to verify that temperature difference is the core factor driving circulation.

[0006] The existing devices mostly use a conventional interlocking method to close the top cover and the main body of the chamber. The disassembly and assembly operations are cumbersome, and the sealing performance decreases significantly after repeated disassembly and assembly. This can easily cause air leakage in the chamber during the experiment, which can interfere with the stable organization of the internal airflow and affect the accuracy and repeatability of the experimental phenomena. Therefore, we propose a dynamic visualization demonstration device for thermal circulation and its experimental method to solve the above-mentioned problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a dynamic visualization demonstration device for thermal circulation and its experimental method. It solves the problems of existing thermal circulation demonstration devices, such as disordered mixing of hot and cold air, unclear circulation trajectory display, lack of control experimental groups for verification of principles, cumbersome disassembly and assembly of the top cover, leakage due to seal failure after repeated use, and poor accuracy and repeatability of experimental phenomena.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a dynamic visualization demonstration device for thermal circulation, comprising:

[0009] The transparent box has a rectangular structure, with a base at the bottom and a top cover at the top.

[0010] Two partitions are installed inside the transparent box, dividing the interior of the transparent box into a first experimental area, a second experimental area, and a third experimental area arranged in a horizontal direction;

[0011] The first heating group is set in the first experimental area, and a heat-conducting container is provided on its top to heat the air in the first experimental area, serving as a control group;

[0012] The second heating group is located in the second experimental area. It is also equipped with a heat-conducting container on its top. The heat-conducting container located in the second experimental area contains a tracer. The tracer sublimates or volatilizes under the heating of the second heating group to form a visible tracer gas flow, which is used as the experimental group.

[0013] A refrigeration unit, located in the third experimental zone, is used to cool the air in the third experimental zone and serves as a control group.

[0014] The background layer is observed to be located on at least one side wall of the transparent enclosure;

[0015] And a connecting locking component, disposed between the top cover and the transparent box, for detachably sealing and fixing the top cover and the transparent box together.

[0016] Preferably, the connection locking component includes:

[0017] The first strong magnet is embedded in the lock lugs fixedly installed on both sides of the top of the transparent box;

[0018] The second strong magnet is embedded in the top cover at a position corresponding to the lock lug;

[0019] The first and second strong magnets are arranged with opposite magnetic poles, and the top cover is locked to the transparent box by magnetic attraction.

[0020] Preferably, the connection locking component includes:

[0021] Rectangular grooves are formed on both sides of the top cover;

[0022] The rotating shaft is fixedly installed within the rectangular groove;

[0023] The T-shaped rod is rotatably mounted on the rotating shaft;

[0024] The abutment ring is slidably mounted on the T-shaped rod;

[0025] A spring is sleeved on the T-shaped rod, and the two ends of the spring are fixedly connected to the abutment ring and the T-shaped rod, respectively.

[0026] A bayonet is provided on one side of the lock lug and is adapted to the T-shaped rod;

[0027] The T-shaped rod can rotate around the rotating axis to engage with the bayonet, and the spring drives the abutment ring to press against the locking lug through elastic force, so that the top cover and the transparent box are kept locked.

[0028] Preferably, a handle is fixedly installed on the top of the top cover to facilitate the removal and placement of the top cover.

[0029] Preferably, both the base and the top cover are provided with sealing gaskets on the side near the transparent housing, for forming a sealed fit between the base and the transparent housing, and between the top cover and the transparent housing, when the connecting locking assembly is locked.

[0030] Preferably, the partition is a transparent partition, and the top and bottom areas of the partition are respectively opened as ventilation areas, so that adjacent experimental areas are interconnected at the top and bottom to form airflow channels.

[0031] Preferably, the heat-conducting container is an aluminum can, and the tracer is solid iodine. The solid iodine sublimates into purple iodine vapor under the heating of the second heating group, serving as a tracer medium for airflow.

[0032] Preferably, the refrigeration unit includes a storage box and ice blocks placed inside the storage box.

[0033] Preferably, the observation background layer is a white background plate attached to the rear side wall of the transparent box, and the transparent box is made of transparent glass or transparent plastic.

[0034] This invention provides an experimental method for a dynamic visualization demonstration device of thermal circulation, comprising the following steps:

[0035] S1. Place the transparent box on the base;

[0036] S2. A first heating group is set up in the first experimental area as a control group, a second heating group is set up in the second experimental area and the tracer is placed in a heat-conducting container as an experimental group, and a cooling group is placed in the third experimental area as a control group.

[0037] S3. Place the top cover onto the top of the transparent box, and seal and lock the top cover to the transparent box using the connecting locking assembly;

[0038] S4. Simultaneously activate the first heating group, the second heating group, and the cooling group to heat up the air in the first and second experimental areas and cause the air in the third experimental area to cool down.

[0039] S5. In the second experimental zone, the tracer sublimates or volatilizes under the heating of the second heating group to form a visible tracer gas flow. The visible tracer gas flow rises with the hot air and flows to the third experimental zone through the vent at the top of the partition. After sinking with the cold air, it flows back to the second experimental zone through the vent at the bottom of the partition, forming a closed thermal circulation path. The complete circulation trajectory of the tracer gas flow can be observed through the transparent box and with the help of the observation background layer.

[0040] S6. Compare and observe the rising phenomenon of unmarked hot air in the first experimental area with the flow path of marked hot air in the second experimental area to verify the formation mechanism of thermal circulation.

[0041] Beneficial effects

[0042] This invention provides a dynamic visualization demonstration device for thermal circulation and its experimental method. Compared with the prior art, it has the following advantages:

[0043] This dynamic visualization demonstration device for thermal circulation and its experimental method divide the interior of a transparent box into three experimental areas using partitions. Ventilation channels are set only at the top and bottom of the partitions to guide and constrain the hot and cold airflows inside the box, avoiding the problem of disordered mixing of hot and cold air. This ensures that the airflow strictly follows the preset channels to complete the complete cycle of rising, horizontal flow, sinking, and recirculation. Combined with tracers, a visual airflow trajectory is formed, which can clearly present the complete closed path of thermal circulation, significantly improving the intuitiveness of the demonstration.

[0044] Setting up a control group, experimental group, and comparison group to operate synchronously, and conducting experiments in multiple experimental areas simultaneously, allows for the comparison and observation of the hot air movement phenomenon without tracer labels with the circulation trajectory marked by tracers, establishing an objective comparison benchmark. This effectively eliminates interference from external variables such as ambient temperature and heating power, making it easier for learners to verify that temperature difference is the core driving factor of thermal circulation, improving the argumentation logic of teaching experiments, and overcoming the drawbacks of traditional devices that only set up a single experimental group.

[0045] It features two selectable connection and locking structures, which, together with the sealing gasket, achieve a sealed chamber. The top cover is easy to disassemble and assemble, and it can maintain good sealing performance even after multiple disassemblies and reassemblies. This effectively prevents air leakage from interfering with the internal airflow field, ensuring the accuracy of experimental phenomena and the repeatability of experiments. At the same time, the overall structure is simple, the tracer phenomenon is highly recognizable, the parts are readily available, and the operation threshold is low, making it very suitable for demonstration and teaching of the principle of thermal circulation in high school geography classes. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0047] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0048] Figure 3 This is a partial cross-sectional view of the overall structure of the present invention;

[0049] Figure 4 This is a structural schematic diagram of the transparent box body and the connecting parts such as the top cover of the present invention;

[0050] Figure 5 This is a schematic diagram of the connection locking component of the present invention.

[0051] In the diagram: 101. Transparent box; 102. Base; 103. Top cover; 104. Handle; 105. Locking lug; 106. Partition; 107. First heating group; 108. Second heating group; 109. Heat-conducting container; 110. Cooling group; 111. Observation background layer; 2. Connecting locking assembly; 201. First strong magnet; 202. Second strong magnet; 203. Rotating shaft; 204. T-shaped rod; 205. Bayonet; 206. Abutment ring; 207. Spring. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] like Figure 1-5 As shown:

[0054] A dynamic visualization demonstration device for thermal circulation includes:

[0055] The transparent box 101 has a rectangular structure, with a base 102 at the bottom and a top cover 103 at the top. A handle 104 is fixedly installed on the top of the top cover 103 to facilitate the removal and placement of the top cover 103.

[0056] Two partitions 106 are set inside the transparent box 101, dividing the interior of the transparent box 101 into a first experimental area, a second experimental area, and a third experimental area arranged in a horizontal direction. The partitions 106 are transparent partitions, and the top and bottom areas of the partitions 106 are opened as ventilation areas, so that adjacent experimental areas are interconnected at the top and bottom and form airflow channels.

[0057] The first heating group 107 is set in the first experimental area, and a heat-conducting container 109 is provided on its top for heating the air in the first experimental area as a control group;

[0058] The second heating group 108 is located in the second experimental area. It is also equipped with a heat-conducting container 109 on its top. The heat-conducting container 109 located in the second experimental area contains a tracer. The tracer sublimates or volatilizes under the heating of the second heating group 108 to form a visible tracer airflow, which is used as the test group. The heat-conducting container 109 is an aluminum can, and the tracer is solid iodine. The solid iodine sublimates under the heating of the second heating group 108 to form purple iodine vapor, which serves as the tracer medium for airflow.

[0059] The refrigeration unit 110 is set in the third experimental zone and is used to cool the air in the third experimental zone. As a control group, the refrigeration unit 110 includes a storage box and ice blocks placed in the storage box.

[0060] The background layer 111 is disposed on at least one side wall of the transparent box 101. The background layer 111 is a white background plate attached to the rear side wall of the transparent box 101. The transparent box 101 is made of transparent glass or transparent plastic.

[0061] And a connecting locking component 2, which is disposed between the top cover 103 and the transparent box 101, for detachably sealing and fixing the top cover 103 and the transparent box 101;

[0062] Connection locking component 2 includes:

[0063] The first strong magnet 201 is embedded in the locking lugs 105 fixedly installed on both sides of the top of the transparent box 101;

[0064] The second strong magnet 202 is embedded in the top cover 103 at the position corresponding to the lock lug 105; the first strong magnet 201 and the second strong magnet 202 are arranged with opposite magnetic poles of different shapes, and the top cover 103 and the transparent box 101 are locked by magnetic attraction.

[0065] Rectangular grooves are formed on both sides of the top cover 103;

[0066] The rotating shaft 203 is fixedly installed inside the rectangular groove;

[0067] T-shaped rod 204 is rotatably mounted on rotating shaft 203;

[0068] The contact ring 206 is slidably mounted on the T-shaped rod 204;

[0069] Spring 207 is sleeved on T-shaped rod 204, and the two ends of spring 207 are fixedly connected to abutment ring 206 and T-shaped rod 204 respectively;

[0070] The bayonet 205 is located on one side of the lock lug 105 and is compatible with the T-shaped rod 204;

[0071] The T-shaped rod 204 can rotate around the rotating shaft 203 to engage with the bayonet 205. The spring 207 drives the abutment ring 206 to press against the locking lug 105 through elastic force, so that the top cover 103 and the transparent box 101 remain locked.

[0072] Both the base 102 and the top cover 103 have sealing gaskets on the side near the transparent housing 101, which are used to form a sealed fit between the base 102 and the transparent housing 101, and between the top cover 103 and the transparent housing 101, when the connecting locking component 2 is locked.

[0073] In this implementation plan: the dynamic visualization demonstration device for thermal circulation and its experimental method, when in use, the main body of the device is a rectangular transparent box 101, with a base 102 mounted at the bottom and a top cover 103 mounted at the top; two partitions 106 are fixedly installed inside the transparent box 101, the partitions 106 are made of transparent sheet material, and ventilation areas are opened in the top and bottom areas of the partitions 106. The two partitions 106 divide the inner cavity of the transparent box 101 into a first experimental area, a second experimental area, and a third experimental area arranged horizontally. Adjacent experimental areas can only exchange gases through the upper and lower ventilation areas of the partitions 106; a white background plate 111 is attached to the rear side wall of the transparent box 101 to increase the contrast of the tracer airflow and the background, making it easier to observe the airflow trajectory;

[0074] During the experiment, the transparent box 101 is first placed stably on the base 102, with a pre-installed sealing gasket on the side of the base 102 closest to the transparent box 101. The first heating group 107 is placed in the first experimental area as a control group without tracer.

[0075] A second heating group 108 is set up in the second experimental area. A heat-conducting container 109 (aluminum can) is placed on top of the second heating group 108, and solid iodine tracer is filled into the heat-conducting container 109.

[0076] The third experimental area is equipped with a refrigeration unit 110, which contains ice blocks to cool the air in the third experimental area. The partition 106 prevents the gas in the middle of the chamber from flowing directly laterally, and limits the gas to the ventilation channels at the top and bottom of the partition 106 to avoid disorderly mixing of gases.

[0077] After all the internal components are arranged, the top cover 103 is placed on the top of the transparent box 101. The side of the top cover 103 facing the transparent box 101 is also pre-installed with a sealing gasket. A handle 104 is fixedly installed on the top surface of the top cover 103, and the operator can hold the handle 104 to take the top cover 103 out.

[0078] The top cover 103 and the transparent box 101 are detachably sealed and locked together by the connecting locking component 2, which has two selectable locking implementation structures:

[0079] Locking lugs 105 are provided on both sides of the top of the transparent box 101, and a first strong magnet 201 is embedded in the locking lugs 105; a second strong magnet 202 is embedded in the top cover 103 at a position corresponding to the locking lugs 105; the first strong magnet 201 and the second strong magnet 202 have opposite magnetic poles and attract each other by magnetic force to press the top cover 103 tightly, which, together with the sealing gaskets at the base 102 and the top cover 103, achieves the sealing of the inner cavity of the transparent box 101;

[0080] Rectangular slots are provided on both sides of the top cover 103, and a rotating shaft 203 is fixed inside the rectangular slots; a T-shaped rod 204 is rotatably mounted on the rotating shaft 203; an abutment ring 206 is slidably mounted on the body of the T-shaped rod 204, and a spring 207 is sleeved on the outside of the T-shaped rod 204, with both ends of the spring 207 fixed to the abutment ring 206 and the T-shaped rod 204 respectively; a latch 205 matching the T-shaped rod 204 is provided on the side of the locking lug 105, and the operator rotates the T-shaped rod 204, and the T-shaped rod 204... 04 Rotate around the rotating axis 203 and insert into the bayonet 205; the spring 207 releases elastic force to push the contact ring 206 to press the locking lug 105, so that the top cover 103 presses down to press the sealing gasket, completing the overall sealing of the transparent box 101. After locking, a closed experimental chamber is formed inside the transparent box 101, and the outside air cannot penetrate in and the internal tracer gas will not leak out. The three experimental areas only retain the upper and lower ventilation channels of the partition 106 to eliminate the interference of the outside airflow on the circulation inside the box.

[0081] After the sealing assembly is completed, the first heating group 107 and the second heating group 108 are turned on simultaneously. The cooling group 110 relies on the ice cubes inside the box to continuously absorb heat and cool. The air inside the first experimental zone is heated by the first heating group 107. The air expands and decreases in density due to the heat, forming a low pressure and generating a vertical upward movement of hot air. The air inside the second experimental zone is heated by the second heating group 108. Similarly, it expands and decreases in density due to the heat, forming a low pressure and generating a vertical downward movement of hot air. The air inside the third experimental zone is cooled by the ice cubes in the cooling group 110. The air contracts and increases in density, forming a high pressure and generating a vertical downward movement of cold air. Because the partition 106 blocks the horizontal airflow in the middle, the gas exchange driven by air pressure can only pass through the ventilation area at the top and bottom of the partition 106. A stable temperature difference and air pressure difference are built inside the transparent box 101 to provide a power source for thermal circulation.

[0082] The heat generated by the second heating group 108 is transferred to the heat-conducting container 109. The solid iodine inside the heat-conducting container 109 sublimates upon heating, producing purple iodine vapor, which forms a visible tracer airflow. The tracer airflow moves upward with the hot air rising in the second experimental area, passes through the ventilation area at the top of the partition 106, and flows horizontally into the third experimental area.

[0083] After the airflow carrying iodine vapor enters the third experimental zone, it comes into contact with the low-temperature environment created by the refrigeration unit 110. The air cools and contracts, and its density increases. The airflow then sinks to the bottom of the transparent box 101. Driven by the pressure difference between the chambers, the airflow passes through the ventilation area at the bottom of the partition 106 and flows horizontally back to the second experimental zone. This cycle repeats, forming a complete closed loop path inside the transparent box 101: the second experimental zone heats up and rises, the top of the partition 106 flows horizontally to the third experimental zone, the third experimental zone cools down and sinks, and the bottom of the partition 106 flows horizontally back to the second experimental zone.

[0084] Through the transparent box 101, the experimenters were able to clearly and completely observe the entire circulation trajectory of the iodine vapor marking by observing the contrasting effect of the background layer 111.

[0085] The first heating group 107 inside the first experimental area also heats the air, generating hot air rising. However, no tracer is set up inside the first experimental area, so the airflow cannot be directly observed. The unmarked hot air movement phenomenon in the first experimental area is compared synchronously with the complete circulation trajectory marked by iodine vapor in the second experimental area, which intuitively verifies that the regional temperature difference is the core driving condition for the formation of thermal circulation, thus completing the teaching demonstration experiment.

[0086] This invention provides an experimental method for a dynamic visualization demonstration device of thermal circulation, comprising the following steps:

[0087] S1. Place the transparent box 101 on the base 102;

[0088] S2. Set up a first heating group 107 in the first experimental area as a control group, set up a second heating group 108 in the second experimental area and put the tracer into a heat-conducting container 109 as an experimental group, and place a cooling group 110 in the third experimental area as a control group.

[0089] S3. Cover the top cover 103 onto the top of the transparent box 101, and seal and lock the top cover 103 and the transparent box 101 by connecting and locking component 2.

[0090] S4. Simultaneously activate the first heating group 107, the second heating group 108 and the cooling group 110 to heat up the air in the first and second experimental zones and cool down the air in the third experimental zone.

[0091] S5. In the second experimental zone, the tracer sublimates or volatilizes under the heating of the second heating group 108 to form a visible tracer airflow. The visible tracer airflow rises with the hot air and flows to the third experimental zone through the vent at the top of the partition 106. After sinking with the cold air, it flows back to the second experimental zone through the vent at the bottom of the partition 106, forming a closed thermal circulation path. The complete circulation trajectory of the tracer airflow can be observed through the transparent box 101 and with the help of the observation background layer 111.

[0092] S6. Compare and observe the rising phenomenon of unmarked hot air in the first experimental area with the flow path of marked hot air in the second experimental area to verify the formation mechanism of thermal circulation.

[0093] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dynamic visualization demonstration device for thermal circulation, characterized in that: include: A transparent box (101) has a rectangular parallelepiped structure, with a base (102) at the bottom and a top cover (103) at the top. Two partitions (106) are disposed inside the transparent box (101) to divide the interior of the transparent box (101) into a first experimental area, a second experimental area and a third experimental area arranged in a horizontal direction; The first heating group (107) is set in the first experimental area, and a heat-conducting container (109) is provided on its top to heat the air in the first experimental area as a control group; The second heating group (108) is located in the second experimental area, and a heat-conducting container (109) is also provided on its top. The heat-conducting container (109) located in the second experimental area contains a tracer. The tracer sublimates or volatilizes under the heating of the second heating group (108) to form a visible tracer gas flow, which is used as an experimental group. A refrigeration unit (110) is installed in the third experimental zone to cool the air in the third experimental zone, serving as a control group; Observe the background layer (111), which is disposed on at least one side wall of the transparent box (101); And a connecting locking component (2) is provided between the top cover (103) and the transparent box (101) for detachably sealing and fixing the top cover (103) and the transparent box (101).

2. The dynamic visualization demonstration device for thermal circulation according to claim 1, characterized in that: The connection locking component (2) includes: The first strong magnet (201) is embedded in the lock lugs (105) fixedly provided on both sides of the top of the transparent box (101); The second strong magnet (202) is embedded in the top cover (103) at a position corresponding to the lock lug (105); The first strong magnet (201) and the second strong magnet (202) are arranged with opposite magnetic poles and the top cover (103) and the transparent box (101) are locked by magnetic attraction.

3. The dynamic visualization demonstration device for thermal circulation according to claim 2, characterized in that: The connection locking component (2) includes: Rectangular grooves are formed on both sides of the top cover (103); A rotating shaft (203) is fixedly disposed within the rectangular groove; The T-shaped rod (204) is rotatably mounted on the rotating shaft (203); The abutment ring (206) is slidably disposed on the T-shaped rod (204); A spring (207) is sleeved on the T-shaped rod (204), and the two ends of the spring (207) are fixedly connected to the abutment ring (206) and the T-shaped rod (204) respectively; A bayonet (205) is provided on one side of the lock lug (105) and is adapted to the T-shaped rod (204); The T-shaped rod (204) can rotate around the rotating shaft (203) to engage with the bayonet (205), and the spring (207) drives the abutment ring (206) to press against the locking lug (105) through elastic force, so that the top cover (103) and the transparent box (101) remain locked.

4. The dynamic visualization demonstration device for thermal circulation according to claim 2, characterized in that: A handle (104) is fixedly installed on the top of the top cover (103) to facilitate the taking and putting away of the top cover (103).

5. The dynamic visualization demonstration device for thermal circulation according to claim 1, characterized in that: Both the base (102) and the top cover (103) are provided with sealing gaskets on the side near the transparent box (101) to form a sealed fit between the base (102) and the transparent box (101) and between the top cover (103) and the transparent box (101) when the connecting locking assembly (2) is locked.

6. The dynamic visualization demonstration device for thermal circulation according to claim 1, characterized in that: The partition (106) is a transparent partition, and the top and bottom areas of the partition (106) are respectively opened as ventilation areas, so that adjacent experimental areas are interconnected at the top and bottom to form an airflow channel.

7. The dynamic visualization demonstration device for thermal circulation according to claim 1, characterized in that: The heat-conducting container (109) is an aluminum can, and the tracer is solid iodine. The solid iodine sublimates into purple iodine vapor under the heating of the second heating group (108), which serves as a tracer medium for airflow.

8. The dynamic visualization demonstration device for thermal circulation according to claim 1, characterized in that: The refrigeration unit (110) includes a storage box and ice blocks placed inside the storage box.

9. The dynamic visualization demonstration device for thermal circulation according to claim 1, characterized in that: The observation background layer (111) is a white background plate attached to the rear side wall of the transparent box (101), which is made of transparent glass or transparent plastic.

10. The experimental method of the dynamic visualization demonstration device for thermal circulation according to claim 1, characterized in that: The process, performed using the dynamic visualization demonstration device for thermal circulation as described in any one of claims 1 to 9, includes the following steps: S1. Place the transparent box (101) on the base (102); S2. A first heating group (107) is set up in the first experimental area as a control group, a second heating group (108) is set up in the second experimental area and the tracer is placed in a heat-conducting container (109) as an experimental group, and a cooling group (110) is placed in the third experimental area as a control group. S3. Cover the top cover (103) onto the top of the transparent box (101) and seal and lock the top cover (103) and the transparent box (101) through the connecting locking assembly (2); S4. Simultaneously activate the first heating group (107), the second heating group (108), and the cooling group (110) to heat up the air in the first and second experimental areas and cause the air in the third experimental area to cool down. S5. The tracer in the second experimental zone sublimates or volatilizes under the heating of the second heating group (108) to form a visible tracer gas flow. The visible tracer gas flow rises with the hot air and flows to the third experimental zone through the vent at the top of the partition (106). After sinking with the cold air, it flows back to the second experimental zone through the vent at the bottom of the partition (106), forming a closed thermal circulation path. The complete circulation trajectory of the tracer gas flow can be observed through the transparent box (101) and with the help of the observation background layer (111). S6. Compare and observe the rising phenomenon of unmarked hot air in the first experimental area with the flow path of marked hot air in the second experimental area to verify the formation mechanism of thermal circulation.

Images