Mandarin duck pan model for demonstrating eddy current heat effect

Abstract

The utility model relates to a mandarin duck hotpot model used for demonstrating eddy current heat effect, which is characterized in that the mandarin duck hotpot model comprises a hotpot wall, two hotpot lugs, a partition plate and a hotpot bottom, the hotpot lugs are semi-cylindrical and are horizontally and symmetrically fixed on the outer side of the hotpot wall by taking the central axis of the hotpot bottom as the axis, and the hotpot bottom is divided into an area A and an area B through the wave-shaped partition plate; the pot wall, the pot lugs, the partition plate and the pot bottom are all made of acrylic materials. Through the ingenious appearance design, the temperature change of the pot bottom is demonstrated by using the temperature sensing material, so that the color change of the pot bottom with and without the aluminum plate forms a contrast experiment, the heat effect principle of eddy current is visually demonstrated, and the heat effect demonstrating device is suitable for teaching and science popularization.

Description

(I) TECHNICAL FIELD

[0001] The utility model relates to a physical phenomenon demonstration equipment, in particular to a kind of for demonstrating eddy current heat effect's yuzhang pot model. (II) BACKGROUND

[0002] Eddy current phenomenon is an important concept in high school physics electromagnetism, and the main content includes the thermal effect of eddy current, mechanical effect (electromagnetic drive and electromagnetic damping phenomenon) and magnetic effect, in actual teaching, mechanical effect and magnetic effect are easy to demonstrate by experiment, while thermal effect is more abstract, and it is often difficult to demonstrate intuitively.For this problem, scholars have improved the demonstration experiment of eddy current thermal effect, but these improvements are often far from the actual life experience of students, and students are difficult to truly understand the thermal effect of eddy current.However, the widely used electromagnetic oven in daily life is actually an ideal device for demonstrating the thermal effect of eddy current, and its working principle is that a changing magnetic field is generated inside the electromagnetic oven, thereby generating a large amount of eddy current in the metal pot bottom above the oven, which generates a large amount of Joule heat in the pot bottom, achieving the purpose of heating food, while students often mistakenly believe that the electromagnetic oven itself is heated, and the heat is transferred to the pot.

[0003] To solve this problem, the present study aims to explore how to use the electromagnetic oven to demonstrate the thermal effect of eddy current, and to design a comparative experiment to enhance the teaching effect, while visualizing the temperature change of the pot bottom, so that students can correctly understand the working principle of the electromagnetic oven and the generation conditions of the thermal effect of eddy current. (III)SUMMARY

[0004] The technical scheme adopted by the utility model is: a yuzhang pot model for demonstrating the thermal effect of eddy current, characterized by including a pot wall, two pot ears, a partition and a pot bottom, wherein the pot ears are semi-cylindrical in shape and horizontally symmetrical to the pot bottom axis, and are fixed to the outside of the pot wall, the pot bottom is divided into area A and area B by a wave-shaped partition, and the pot wall, pot ear, partition and pot bottom are all made of acrylic material.

[0005] As described above, the yuzhang pot model for demonstrating the thermal effect of eddy current, wherein a piece of aluminum plate is fixed to the surface of area B, and the shape of the aluminum plate matches the shape of area B.

[0006] As described above, the yuzhang pot model for demonstrating the thermal effect of eddy current, wherein area A and the aluminum plate in area B are coated with temperature-sensitive ink, which can change color when heated.

[0007] The utility model has the advantages of:

[0008] The temperature sensing material is used innovatively, so that students can directly perceive the temperature rise and fall by observing the color change of the bottom of the pot. Meanwhile, the model is designed by using the common double boiler in students' life, and the generation condition of the eddy current heat effect can be directly demonstrated by comparing the temperature change in different areas. Through the model, students can not only correctly understand the working principle of the induction cooker, but also deeply understand the eddy current heat effect and master the necessary condition for the generation of the eddy current heat effect. (IV)DETAILED DESCRIPTION

[0009] Figure 1 It is a structural schematic view of a double boiler model for demonstrating the eddy current heat effect.

[0010] Figure 2 It is a bottom view of a double boiler model for demonstrating the eddy current heat effect.

[0011] 1-pot wall, 2-pot lug, 3-baffle, 4-area A, 5-area B (V)DETAILED DESCRIPTION

[0012] The utility model will be described in detail below in combination with the drawings and specific embodiments, but not as the limitation of the utility model.

[0013] As shown in Figure 1 and Figure 2 , a double boiler model for demonstrating the eddy current heat effect, characterized in that it comprises a pot wall 1, two pot lugs 2, a baffle 3 and a bottom, wherein the pot lug 2 is a semi-cylindrical shape and is fixed horizontally symmetrically on the outside of the pot wall 1 with the bottom central axis as the axis, the bottom is divided into area A (4) and area B 5 by the wavy baffle 3, and the pot wall 1, the pot lug 2, the baffle 3 and the bottom are all made of acrylic material. A piece of aluminum plate is fixed on the surface of area B 5, and the shape of the aluminum plate matches the shape of area B 5. Area A 4 and the aluminum plate in area B 5 are coated with temperature sensing ink, which can change color when heated.

[0014] In the demonstration process, the model is placed above the induction cooker, the power of the induction cooker is turned on, and a large amount of eddy current is generated in the aluminum plate in area B 5 by the changing magnetic field in the induction cooker, thereby generating a large amount of Joule heat. There is no closed conductor in area A 4, so no eddy current can be generated, thus the temperature of area B 5 rises, the temperature sensing ink coated on its surface changes color, and area A 4 has no obvious change, proving that the working principle of the induction cooker is that the changing magnetic field generates eddy current in the closed conductor to generate heat. At the same time, by comparing the temperature changes of area A 4 and area B 5, it is proved that the generation condition of the eddy current heat effect is that the changing magnetic field and the closed conductor must be simultaneously provided.

[0015] The utility model is not limited to the above specific embodiment. The skilled in the art to which the utility model belongs makes various modifications, supplements or substitutes in the similar way to the described specific embodiment, without deviating from the spirit of the utility model or beyond the range defined by the attached claims, all of which are within the scope of the utility model claimed.

Claims

1. A bimetallic pot model for demonstrating the effect of eddy currents, characterized in that The pot includes a pot wall (1), two pot ears (2), a partition (3) and a pot bottom, wherein the pot ears (2) are semi-cylindrical in shape and are fixed horizontally and symmetrically outside the pot wall (1) with the middle axis of the pot bottom as the axis, and the pot bottom is divided into area A (4) and area B (5) by the wave-shaped partition (3), and the pot wall (1), the pot ears (2), the partition (3) and the pot bottom are all made of acrylic material.

2. The dual-color pot model for demonstrating the eddy current heat effect according to claim 1, characterized in that: An aluminum plate is fixed on the surface of area B (5), and the shape of the aluminum plate matches the shape of area B (5).

3. The model as claimed in claim 1, wherein: Area A (4) and the aluminum plate located in area B (5) are coated with temperature-sensitive ink, which can change color when heated.

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