A point-line heat source conversion device

Abstract

A point-line heat source conversion device relates to the field of thermal control technology. The purpose of the present invention is to provide a designed point-line heat source conversion device. The device includes a first conductor and a second conductor. At least one notch is cut at the edge of the first conductor, and the notch is a 1 / 4 sector structure. The second conductor is a sector ring matching the notch of the first conductor. The second conductor is connected to the first conductor, and the thermal conductivity of the second conductor is greater than that of the first conductor. The present invention can convert a point heat source into a line heat source. The converted line heat source maintains uniform and stable transmission, and can eliminate the drawback of uneven heating caused by non-uniform heat sources. The device can be applied in reverse, that is, it can aggregate the line heat source diffused over a large area into a point heat source, having the function of heat energy collection. At the same time, the device has a simple structure and is easy to implement, and the materials used are all natural materials, with low cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal control, and particularly relates to a point-line heat source conversion device. Background Art

[0002] Thermal energy improves the quality of human life and enhances human productivity, and is closely related to social production and life. For example, cooking food requires heating the food, metallurgical forging requires heating ores and metals, and long-running machinery needs heat dissipation. However, in actual production and life, the size of the heat source providing thermal energy is often limited. For example, the size of the cooking pot during cooking, the heating chamber for heating metal blanks in traditional forging processes, etc. all have limited heating areas. And the area of the object to be heated can be of any size. Moreover, according to different engineering backgrounds, some objects to be heated need to be uniformly heated. Therefore, aiming at the two problems of the incoordination between the limited heating platform and the arbitrarily sized object to be heated, and the need for the object to be uniformly heated, a device that can convert a point heat source (or a heat source with a small size) into a uniform linear heat source needs to be designed. Summary of the Invention

[0003] The purpose of the present invention is to provide a designed point-line heat source conversion device. The point heat source can be converted into a linearly transmitted uniform heat source through the point-line heat source conversion device.

[0004] A point-line heat source conversion device of the present invention includes a first conductor and a second conductor. At least one notch is cut at the edge of the first conductor, and the notch is a 1 / 4 sector structure; the second conductor is a sector ring matching the notch of the first conductor, the second conductor is connected to the first conductor, and the thermal conductivity of the second conductor is greater than that of the first conductor.

[0005] Further, two notches with the same size are cut on one side of the first conductor, and the two notches with the same size are symmetrically arranged, and a boss is formed between them.

[0006] Further, the second conductor is laid on the first conductor and fixedly connected; or the second conductor is embedded in the first conductor.

[0007] Further, the fixed connection between the second conductor and the first conductor is achieved by bonding with thermal conductive silicone.

[0008] Further, a layer of thermal conductive grease is coated at the contact between the second conductor and the first conductor.

[0009] Further, the second conductor is a 1 / 4 sector ring.

[0010] Further, the second conductor is a 1 / 4 sector ring, and the calculation formula for the inner diameter r of the ring is as follows:

[0011]

[0012] Among them, R is the outer diameter of the 1 / 4 sector-shaped ring, and κ 1 is the thermal conductivity of the first conductor (1), and κ 2 is the thermal conductivity of the second conductor (2); κ 2 > κ 1 .

[0013] Furthermore, the outer diameter R of the 1 / 4 sector-shaped ring is determined according to the actual working conditions.

[0014] The present invention includes the following beneficial effects:

[0015] The device of the present invention has the following three characteristics: 1. It can transform a point heat source into a line heat source; 2. The transformed line heat source maintains uniform and stable transmission, and can eliminate the drawback of uneven heating caused by non-uniform heat sources; 3. The device can be applied in reverse, that is, it can gather the line heat source diffused over a large area into a point heat source, and has the function of heat energy collection. At the same time, the device has a simple structure and is easy to implement, and the materials used are all natural materials, with low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the point-line heat source conversion device of the present invention;

[0017] Figure 2 is a schematic diagram of the first conductor of the non-point-line heat source conversion device;

[0018] Figure 3 is the working effect diagram of the conversion of the point heat source to the line heat source of the point-line heat source conversion device of the present invention;

[0019] Figure 4 is the working effect diagram of the non-point-line heat source conversion device;

[0020] Reference numerals: 1, the first conductor; 2, the second conductor; 3, the isothermal line when the point-line heat source conversion device is working. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer and more understandable, the spirit of the content disclosed by the present invention will be described in detail below. Any person skilled in the art in the technical field, after understanding the embodiments of the content of the present invention, can make changes and modifications according to the technology taught by the content of the present invention, and it does not deviate from the spirit and scope of the content of the present invention.

[0022] The illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention.

[0023] Embodiment

[0024] In the process of implementing the method of the present invention, first, select the working background of the point-line heat source conversion device, that is, the first conductor, and determine its thermal conductivity as κ 1 , see appendix Figure 1 . After determining the number of point heat sources to be converted, select a second conductor with a higher thermal conductivity than the working background, and determine its thermal conductivity as κ 2 , see appendix Figure 1 . It is necessary to ensure that the thermal conductivity of the second conductor is higher than that of the first conductor, that is, κ 2 > κ 1 . Then, determine the radius of the 1 / 4 sector area as R according to the working conditions, and finally calculate the inner diameter r of the 1 / 4 ring from .

[0025] After determining the size and material of the point-line heat source conversion device according to the above method, use laser cutting or machining to cut out a 1 / 4 sector area in the working background (i.e., the first conductor), see appendix Figure 1 . Then cut out a 1 / 4 ring from the second conductor with inner and outer diameters of r and R respectively. Finally, inlay the ring into the working background. In the inlay process, mechanical assembly methods such as interference fit can be selected for assembly, or thermal conductive silicone can be used for bonding. The specific assembly method depends on the mechanical properties required by the working environment of the point-line heat source. After assembly, applying a layer of thermal conductive grease at the contact interface between the working background and the 1 / 4 ring can reduce the interfacial thermal resistance between the two, thereby improving the working efficiency of the point-line heat source conversion device.

[0026] In the process of applying this embodiment, first select the material of the first conductor, that is, the working background, as 304 stainless steel, and its thermal conductivity is 15.2 W·m -1 K -1 . The width of the working background is selected as 6 cm, the thickness is 0.2 cm, and the length is not limited. Use wire cutting technology in machining technology to cut out two sector areas in the first conductor. The number of point heat sources to be converted is 1, and the material of the second conductor is selected as pure copper, and its thermal conductivity is 400 W·m -1 K -1 . The selected radius of the 1 / 4 sector area is 3 cm, and the thickness is 0.2 cm. After calculation, the inner diameter of the 1 / 4 ring is 2.89 cm. Use wire cutting technology in machining to cut out a 1 / 4 copper ring. Then use thermal conductive silicone to bond the two rings to the first conductor. So far, the assembly work of the point-line heat source conversion device has been completed. Then bond a heating sheet with an area of 0.044 cm 2 to the boss, see appendix Figure 1Subsequently, an electric current is passed through the heating sheet to form a point heat source, and the temperature of the point heat source is controlled at about 100 °C. The heat flux will be transformed into a linearly distributed heat source with a uniform transmission area of 0.12 cm 2 under the action of the point-line heat source conversion device. For its working effect, see Figure 3 . Due to the diffusion symmetry of the temperature field, when the linearly distributed heat source with an area of 0.12 cm 2 is applied to the right side of the point-line heat source conversion device, see Appendix Figure 1 , the linearly distributed heat source will converge into a point heat source with an area of 0.044 cm 2 under the action of the point-line heat source conversion device.

[0027] The above content is only an implementation case of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there can be changes in the specific implementation methods and application scopes. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A point-line heat source conversion device, characterized in that it comprises a first conductor (1) and a second conductor (2). At least one notch is cut at the edge of the first conductor (1), and the notch is a 1 / 4 sector structure; the second conductor (2) is a sector ring matching the notch of the first conductor (1), the second conductor (2) is connected to the first conductor (1), and the thermal conductivity of the second conductor (2) is greater than that of the first conductor (1); The second conductor (2) described above is a 1 / 4-sector circular ring, and the inner diameter of the circular ring r is calculated as follows: ； Among them, R is the outer diameter of the 1 / 4 sector ring, is the thermal conductivity of the first conductor (1), is the thermal conductivity of the second conductor (2); .

2. The point-line heat source conversion device according to claim 1, characterized in that two notches of the same size are cut on one side of the first conductor (1), and the two notches of the same size are symmetrically arranged, and a boss (4) is formed therebetween.

3. The point-line heat source conversion device according to claim 1, characterized in that the second conductor (2) is laid on the first conductor (1) and fixedly connected; or the second conductor (2) is embedded in the first conductor (1).

4. The point-line heat source conversion device according to claim 3, characterized in that the fixed connection between the second conductor (2) and the first conductor (1) is by bonding with thermal conductive silicone.

5. The point-line heat source conversion device according to claim 3 or 4, characterized in that a layer of thermal conductive grease is coated at the contact between the second conductor (2) and the first conductor (1).

6. The point-line heat source conversion device according to claim 1, characterized in that Outer diameter of a 1 / 4 sector-shaped ring R Determined according to the actual working conditions.

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