CN110475398B

CN110475398B - Surface type radiation source and method for determining electric furnace wire power in surface type radiation source

Info

Publication number: CN110475398B
Application number: CN201910758661.3A
Authority: CN
Inventors: 陈红; 彭月; 王景峰; 张亚洲; 苏必达; 邓蓉; 孙宪军; 华昊
Original assignee: Beijing Institute of Environmental Features
Current assignee: Beijing Institute of Environmental Features
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2022-05-06
Anticipated expiration: 2039-08-16
Also published as: CN110475398A

Abstract

The invention relates to a surface type radiation source and a method for determining the power of an electric furnace wire in the surface type radiation source, wherein one embodiment of the surface type radiation source comprises the following steps: an electric furnace wire, a plurality of heat conduction members and a radiation surface; wherein, the electric furnace wire is used as a heating element of the surface type radiation source; each heat conduction member can conduct heat with the electric stove wire, and each heat conduction member is fixedly connected with the radiation surface. The embodiment has the advantages of high working temperature, quick temperature rise, long service life, stable resistance, large allowable surface load, good oxidation resistance, low cost and the like, can effectively raise the temperature of the radiation surface, and meets the requirement of high-efficiency high-temperature surface type radiation sources in practical application.

Description

Surface type radiation source and method for determining electric furnace wire power in surface type radiation source

Technical Field

The invention relates to the technical field of photoelectricity, in particular to a surface type radiation source and a method for determining the power of an electric furnace wire in the surface type radiation source.

Background

The traditional high-temperature radiation source adopts a carbon silicon tube which takes high-purity silicon carbide as a main raw material as a heating element, the carbon silicon tube has the advantages of high working temperature, uniform heating, quick temperature rise, long service life and the like, but the carbon silicon tube is hard and brittle in texture, is generally used for a cavity type high-temperature radiation source, and transfers heat in a radiation mode, so that the temperature rise of the radiation source is slow. The surface-type radiation source generally adopts a resistance wire as a heating element, but the temperature is only about 300 ℃, so that the actual requirement cannot be met, and meanwhile, the resistance wire also transfers heat in a radiation mode, so that the temperature rise of the radiation source is slow.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to make the radiation surface of a surface type radiation source have higher working temperature and simultaneously can quickly heat up.

In order to solve the technical problem, the invention provides a surface type radiation source.

A surface type radiation source of an embodiment of the present invention includes: an electric furnace wire, a plurality of heat conduction members and a radiation surface; wherein, the electric furnace wire is used as a heating element of the surface type radiation source; each heat conduction member can conduct heat with the electric stove wire, and each heat conduction member is fixedly connected with the radiation surface.

Optionally, each heat conducting member is in contact with an electric furnace wire.

Optionally, the surface-type radiation source further comprises a plurality of heat-conducting fins; wherein each heat conduction component is contacted with the heat conduction sheet, and each heat conduction sheet is contacted with the electric stove wire.

Optionally, the thermally conductive sheet is made of an electrically insulating material.

Optionally, the surface type radiation source further comprises: the electric furnace wire tray is used for placing electric furnace wires; wherein the electric wire disc is positioned at the central position of the surface type radiation source.

Optionally, the heat conducting member is a fin.

Optionally, the heat conducting member is made of copper.

Optionally, the thermally conductive member is integrally formed with the radiating surface.

Alternatively, the radiation surface is kept temperature-stable with a heat insulating material except for the portion connected to the heat conductive member.

The invention also provides a method for determining the power of the electric furnace wire in the surface type radiation source.

The method for determining the power of the electric furnace wire in the surface type radiation source comprises the following steps: determining the heat required by the radiation surface in the temperature rising process according to the mass, the specific heat capacity and the working temperature of the radiation surface; and dividing the determined heat by the required temperature rise time to obtain the power of the electric furnace wire.

The technical scheme of the invention has the following advantages: in the surface type radiation source provided by the embodiment of the invention, the electric furnace wire is adopted to replace the traditional resistance wire, so that the surface type radiation source has the advantages of high working temperature (up to 900 ℃), high temperature rise speed, long service life, stable resistance, large allowable surface load, good oxidation resistance, low cost and the like. Simultaneously, can be with the direct and electric stove silk contact of a plurality of heat-conduction components to with heat-conduction component and radiant surface fixed connection, can realize the heat from the quick transfer of electric stove silk to radiant surface with heat-conduction mode like this, make the radiant surface can heat up with high efficiency, satisfied the demand to high-efficient high temperature face type radiation source among the practical application, solved the slower defect of face type radiation source intensification among the prior art.

Drawings

FIG. 1 is a schematic view of the components of a planar radiation source according to an embodiment of the present invention;

FIG. 2 is an exploded schematic view of the components of a planar radiation source according to an embodiment of the present invention;

fig. 3 is a schematic diagram of specific steps of a method for determining the power of an electric furnace wire in a surface-type radiation source according to an embodiment of the present invention.

Description of reference numerals:

20: a heat conductive member; 30: a radiating surface; 40: an electric wire coil; 50: a heat conductive sheet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Fig. 1 is a schematic diagram of a component of a planar radiation source according to an embodiment of the present invention, and fig. 2 is an exploded schematic diagram of a component of a planar radiation source according to an embodiment of the present invention, as shown in fig. 1 and 2, which includes an electric furnace wire (not shown in fig. 1 and 2), a plurality of heat conduction members 20, and a radiation surface 30.

Resistance wires are generally adopted as heating elements of a surface type radiation source in the prior art, but the working temperature is low, and the actual requirements cannot be met. In the embodiment of the invention, the electric furnace wire (the electric furnace wire is generally made of iron-chromium-aluminum and nickel-chromium electric heating alloy wires which are wound and molded by a high-speed winding machine) is used as the heating element of the surface type radiation source, the working temperature of the electric furnace wire is high (up to 1400 ℃), the service life is long, the allowable surface load is large, the oxidation resistance is good, the resistance is stable, and the cost is low. As a preferable scheme, an electric wire reel 40 for placing an electric wire may be provided, and the electric wire reel 40 is made of a high temperature resistant material and may have a groove for placing an electric wire. It is understood that the electric wire reel 40 on which the electric wire is placed is disposed at the center of the surface type radiation source.

In addition, in the embodiment of the invention, the heat can be transferred by adopting a conduction mode instead of a radiation mode in the prior art. Specifically, a plurality of heat conductive members 20 are installed between the electric furnace wires and the radiation surface 30. Preferably, in some embodiments, the thermally conductive member 20 may be a fin (generally, a fin is a metal sheet with high thermal conductivity that increases the surface of the device that requires heat transfer), and the material of which is made may be copper. It is understood that the heat conducting member 20 may be formed in other shapes and may be made of other metal materials, and the present invention is not limited thereto. In some embodiments, the heat conductive member 20 has one end in contact with the electric furnace wire to enable heat conduction and the other end fixedly connected to the radiation surface 30. In other embodiments, the heat conduction member 20 conducts heat to the electric stove wire through the heat conduction sheet 50, that is, one end of the heat conduction member 20 is in contact with the heat conduction sheet 50, the heat conduction sheet 50 is in contact with the electric stove wire, and the other end of the heat conduction member 20 is fixedly connected to the radiation surface 30. In a specific application, the heat conduction member 20 and the radiation surface 30 may be integrally designed. The heat conductive sheet 50 is generally made of a material having electrical insulation with low loss of heat resistance.

With the above arrangement, the present invention can achieve heat transfer from the electric furnace wire to the radiation surface 30 in a conduction manner, and since the conduction manner transfers heat through thermal movement of a large number of molecules in the substance, the heat transfer efficiency thereof is much higher than that of the radiation manner. In this way, efficient heating of the radiation surface 30 can be ensured.

Preferably, in some embodiments, the radiating surface 30 may be provided with a thermal insulating material to maintain temperature stability except for the portion connected with the heat conductive member 20. Through the design, the temperature of the radiation surface 30 in the surface type radiation source of the embodiment of the invention can reach 900 ℃, which is much higher than 300 ℃ which can be reached by the prior surface type radiation source.

In addition, the invention can provide a method for calculating the power of the electric furnace wire in the surface type radiation source. Fig. 3 shows the main steps of the above method:

step S301: and determining the heat required by the radiation surface in the temperature rising process according to the mass, the specific heat capacity and the working temperature of the radiation surface.

In this step, the heat required for heating the radiation surface can be obtained by multiplying the mass of the radiation surface, the specific heat capacity of the radiation surface and the temperature change value of the radiation surface by using a heat formula. Wherein the mass of the radiating surface can be obtained by multiplying the volume by the density, and the temperature variation value can be the difference between the working temperature (e.g. 900 degrees centigrade) and the initial temperature (e.g. room temperature).

Step S302: and dividing the determined heat quantity by the required temperature rise time to obtain the power of the electric furnace wire.

The temperature rise time may be a predetermined index. Through the steps, the power of the electric furnace wire suitable for the surface type radiation source can be determined.

In summary, in the surface-type radiation source of the embodiment of the invention, the electric furnace wire is used to replace the traditional resistance wire, so that the surface-type radiation source has the advantages of high working temperature, fast temperature rise, long service life, stable resistance, large allowable surface load, good oxidation resistance, low cost and the like. Simultaneously, can be with the direct and electric stove silk contact of a plurality of heat-conduction components (also can contact heat-conduction component and conducting strip, contact conducting strip and electric stove silk, thereby realize the heat-conduction between heat-conduction component and the electric stove silk), and with heat traditional component and radiant surface fixed connection, can realize the heat from the electric stove silk to the quick transmission of radiant surface with heat-conduction mode like this, make the radiant surface can high-efficient intensification, the demand to high-efficient high temperature face type radiation source in the practical application has been satisfied, the slower defect of face type radiation source intensification among the prior art has been solved. In addition, the heat conduction process of the electric furnace wire, the heat conduction component (such as a copper fin) and other parts is simple, and the cost is low, so that the surface type radiation source provided by the invention has high practical value and popularization prospect.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A surface-type radiation source, comprising: an electric furnace wire, a plurality of heat conduction members and a radiation surface; wherein the content of the first and second substances,

an electric furnace wire is used as a heating element of the surface type radiation source;

each heat conduction component can conduct heat with the electric stove wire, and is fixedly connected with the radiation surface;

each heat conduction component is in contact with the electric stove wire, the heat conduction components are fins, and the heat conduction components and the radiation surface are integrally formed;

the surface type radiation source further comprises: the electric furnace wire tray is used for placing electric furnace wires; the electric furnace wire tray is provided with a groove for placing the electric furnace wire.

2. The planar radiation source of claim 1,

the surface type radiation source further comprises a plurality of heat conducting sheets; wherein each heat conduction component is contacted with the heat conduction sheet, and each heat conduction sheet is contacted with the electric stove wire.

3. The planar radiation source of claim 2, wherein said thermally conductive sheet is made of an electrically insulating material.

4. The surface radiation source of claim 1, wherein said thermally conductive member is made of copper.

5. The planar radiation source of claim 1, wherein the radiation surface is temperature stabilized with a thermal insulating material except for a portion connected to the heat conducting member.