CN113466114B - Low-energy consumption artificial climate aging device - Google Patents

Abstract

The invention relates to a low energy consumption artificial climate aging device, which comprises a coaxial sample placement rack and a radiation source, the sample placement rack and the radiation source are in an inverted semi-conical shape, there is a gap between the sample placement rack and the radiation source, and the radiation source Rotatably arranged in the sample placement frame; the radiation source includes a rotating shaft, a support seat and a lamp board, the support seat is fixed on the rotating shaft, and the lamp board is arranged on the outer surface of the support seat; the lamp board includes a base plate and is installed on the base plate The LED light source on the LED light source; the LED light source includes at least a plurality of ultraviolet LED lamps, and the ultraviolet LED lamps include several types with different wavelengths, and the plurality of ultraviolet LED lamps form an ultraviolet spectrum component similar to that in solar radiation; the low-energy artificial The climate aging device has simple structure, low energy consumption and long service life. It can also simulate a variety of test environments at the same time, which can effectively reduce the cost of testing.

Description

Low energy consumption artificial climate aging device

technical field

The invention belongs to the technical field of artificial weather aging equipment, and in particular relates to a low energy consumption artificial weather aging device.

Background technique

Light, heat, water and oxidation are several important factors that cause material aging. In order to evaluate the performance of materials, artificial weather aging tests are usually used to evaluate the life of materials. The artificial climate aging test is an artificial accelerated aging test method that simultaneously simulates and strengthens factors such as light, heat, humidity and rainfall in the atmospheric environment in a closed environment (such as a test chamber).

Studies have shown that light is the most important factor leading to material aging; most of the research objects in artificial weathering tests are polymer materials, and the performance degradation of these materials is mainly caused by photochemical reactions caused by ultraviolet rays in solar radiation, and , because other chemical reactions in the material are greatly affected by temperature, therefore, temperature is also an important factor affecting the aging of materials.

The wavelengths that cause the destruction of polymer materials in sunlight are mainly concentrated in ultraviolet rays and some visible light. At present, the artificial light sources used in the artificial weathering test all try to make the energy spectrum distribution in this wavelength range close to the solar spectrum. At present, my country's artificial weathering test mainly uses two kinds of artificial light sources: xenon arc light source and fluorescent ultraviolet light source. Control is one of the laboratory light sources recommended by the International Standardization Committee and the Standardization Committee of my country. Its disadvantage is that a cooling system needs to be installed to cool the xenon arc lamp, and the life of the xenon arc lamp is short and the cost is relatively high. Fluorescent UV light source (250-400nm) can only better simulate the ultraviolet part of the sunlight spectrum, so it is considered to be inferior to xenon arc light source in terms of simulation. However, compared with xenon arc light source, fluorescent UV light source The light source has less energy consumption and heat generation, and has a longer lifespan. Therefore, it is also widely used in artificial weathering tests. With the development of technology, at present, by using LED ultraviolet lamps of various wavelengths and some ordinary LEDs, a radiation source with a spectral distribution closer to sunlight and better simulation can be formed. In addition, if the switch and illuminance of LED lamps with different wavelengths Separately controlled, more irradiation modes can be realized.

In addition, the artificial weather aging box also needs to be equipped with more complicated ventilation, temperature adjustment, humidity adjustment and other systems, which also leads to the high cost and large volume of the artificial weather aging box; moreover, the artificial weather aging test often requires hundreds of Even thousands of hours need to consume a lot of energy.

Contents of the invention

The object of the present invention is to provide an artificial weather aging device with simple structure, low energy consumption and long service life.

Another object of the present invention is to provide an artificial weathering device that can simultaneously provide multiple test environments.

In order to solve the above-mentioned technical problems, the present invention discloses a low-energy artificial weathering device, which includes a coaxial sample placement frame and a radiation source, the sample placement frame and the radiation source are in an inverted semi-conical shape, the sample placement frame and the radiation source There is a gap between them, and the radiation source is rotatably set in the sample placement frame;

The radiation source includes a rotating shaft, a supporting seat and a lamp board, the supporting seat is fixed on the rotating shaft, and the lamp board is arranged on the outer surface of the supporting seat;

The lamp panel includes a substrate and an LED light source installed on the substrate; the LED light source includes at least a plurality of ultraviolet LED lamps, and the ultraviolet LED lamps include several types with different wavelengths, and the plurality of ultraviolet LED lamps form a Ultraviolet spectral composition.

Preferably, a plurality of cooling fins are evenly arranged radially on the outer surface of the substrate.

Preferably, the height of the cooling fins protruding from the substrate is no less than 1/20 of the minimum gap distance between the sample placement rack and the radiation source.

Preferably, the LED light source further includes a non-ultraviolet light emitting diode, and a plurality of ultraviolet LED lamps and the non-ultraviolet light emitting diode form a spectral component that is more similar to solar radiation.

Preferably, the inner side of the sample placement frame is stepped, and when the inner side of the sample placement frame has a plurality of steps, the steps gradually approach the rotating shaft from top to bottom; the slope of each step is parallel to the lamp board, and the slope of the step A placement portion for placing and fixing a sample is formed.

Preferably, each layer of the sample placement rack is equipped with an independently controlled electric heating temperature compensation device.

Preferably, each layer of the sample placement rack is provided with a temperature detection device.

Preferably, an insulating material is provided on the outside of the sample rack.

Preferably, at least a spraying device is provided on the sample placement rack.

Preferably, the substrate is a waterproof aluminum substrate or a flexible circuit board.

The low energy consumption artificial climate aging device of the present invention has at least the following advantages:

1. The structure is simple, which simplifies the heating system, blowing system and cooling system in the ordinary artificial weather aging device. The rotating radiation source and cooling fins solve the heat dissipation problem of the light source; the cooling fins also play a role of wind blades , when it is necessary to simulate a strong wind, it is only necessary to speed up the rotation speed of the radiation source; the heat emitted by the cooling fins and the LED light source can provide a relatively stable local ambient temperature for the sample.

2. The LED light source with low energy consumption is used, which has a longer life, and because the sample rack and the radiation source are set close to each other, the LED light source can achieve the required UV illuminance and save energy by using lamp beads with low power.

3. Place the sample on different placement parts. As the distance between the placement part and the radiation source changes, the UV illumination and temperature of the sample will also change; multiple placement parts, coupled with an electric heating temperature compensation device It can provide multiple UV illumination and temperature modes at the same time; it makes it possible to conduct control tests on multiple samples in multiple environments in one test, and the test results are more reliable.

4. During use, the radiation source keeps rotating, which can better simulate the effect of moving sunlight.

Description of drawings

Fig. 1 is the structural representation of a kind of low energy consumption artificial climate aging device;

FIG. 2 is a schematic diagram of the three-dimensional structure of the radiation source in FIG. 1 .

The labels in the figure are: 1-sample placement rack, 11-step, 111-placement part, 12-electric heating temperature compensation device, 13-insulation material, 14-spraying device, 2-radiation source, 21-rotating shaft, 22- Support seat, 23-light board, 231-substrate, 232-LED light source, 24-radiating fins, 3-gap.

Detailed ways

The present invention will be further described in detail through the examples below, so that those skilled in the art can implement it with reference to the description.

It should be understood that terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

As shown in Figure 1-2, a low-energy artificial weathering device includes a coaxial sample placement rack 1 and a radiation source 2, the sample placement rack and radiation source are in an inverted semi-conical shape, and the sample placement rack and radiation source There is a gap 3 between them, and the radiation source is rotatably arranged in the sample placement rack; the sample placement rack and the radiation source are arranged in an inverted semi-conical shape, which facilitates the smooth flow of water from the sample when spraying, and makes the heat dissipation fins disperse More heat can be dissipated upward along the surface of the substrate, so as to avoid a great influence on the temperature of different placement parts.

There is a gap between the sample rack and the radiation source, and the gap is set according to the power of the radiation source, the size of the sample, etc., but generally speaking, the gap width is much smaller than the distance between the lamp tube and the sample of an ordinary artificial weathering device. The small gap width enables the LED light source to use low-power lamp beads to achieve the required UV illuminance and save energy. In addition, because the price of low-power lamp beads is relatively low, it can also save costs to a certain extent.

The radiation source includes a rotating shaft 21, a supporting seat 22 and a lamp board 23, the supporting seat is fixed on the rotating shaft, and the lamp board is arranged on the outer surface of the supporting seat; the substrate is a waterproof aluminum substrate or a flexible circuit board.

The lamp panel includes a substrate 231 and an LED light source 232 installed on the substrate; the LED light source includes at least a plurality of ultraviolet LED lamps, and the ultraviolet LED lamps include several types with different wavelengths, and the plurality of ultraviolet LED lamps form a pattern similar to solar radiation. UV spectral components in .

A plurality of cooling fins 24 are evenly arranged radially on the outer surface of the substrate. The heat dissipation fins solve the heat dissipation problem of the light source; and, unlike ordinary radiators, the heat dissipation fins guide the heat to the side where the lamp beads are located, so that the heat emitted by the heat dissipation fins can form part of the test environment required by the sample ,Energy saving. It also plays the role of fan blades. When it is necessary to simulate strong winds or accelerate the heat dissipation of the radiation source, it is only necessary to speed up the rotation speed of the radiation source. Therefore, it is no longer necessary to set up a separate cooling system for the radiation source.

The height of the heat dissipation fin protruding from the substrate is not less than 1/20 of the minimum gap distance between the sample rack and the radiation source, so as to ensure the heat dissipation of the heat dissipation fin and the ability to drive the surrounding air. When the height of the heat dissipation fin and When the rotation speed of the radiation source is determined, the wind speed on the placement part corresponding to the local cooling fins is also more certain (compared to the blower).

The LED light source also includes a non-ultraviolet light emitting diode, and a plurality of ultraviolet LED lamps and the non-ultraviolet light emitting diode form a spectral component that is more similar to solar radiation.

The inner side of the sample rack is stepped, and when the inner side of the sample rack has a plurality of steps 11, the steps gradually approach the rotating shaft from top to bottom; the slope of each step is parallel to the lamp board, so as to ensure that the same placement part The UV illuminance received by each part is uniform, and the slope of the steps forms a placing part 111 for placing and fixing the sample. An independently controlled electric heating temperature compensation device 12 is provided on each layer of the sample placement rack. The slope of each step is parallel to the lamp board, which can ensure that the UV illuminance received by each part on the same placement part is uniform; when the sample is placed on different placement parts, as the distance between the placement part and the radiation source changes, the UV illumination received by the sample will change. The UV illuminance and temperature also change accordingly; multiple placement parts, coupled with the heating and temperature compensation of the electric heating temperature compensation device, can provide multiple UV illuminance and temperature modes at the same time; so that one test can be performed on multiple samples in various environments The controlled test results are more reliable.

Furthermore, the LED light source can also be set up in different areas according to the area corresponding to the placement part, and the spectral composition and illuminance of each area can be controlled separately to create more test environments.

A temperature detection device (such as a blackboard or black mark, etc.) is provided on each layer of the sample placement rack. The temperature detection (control) device controls the electric heating temperature compensation device to perform heating compensation according to the target temperature, so that the temperature of the placement part Meet the requirements. In addition, devices such as humidifiers and humidity detection devices can be provided separately.

The outside of the sample rack is provided with thermal insulation material 13; the thermal insulation material can prevent excessive loss of heat and save energy.

The sample rack is also provided with at least a spray device 14 . The spraying device can be set on the uppermost placement part, and directly spray the uppermost placement part, so that the water flows from top to bottom on each sample. Of course, if the gap between the sample placement rack and the radiation source is wide enough , and a spray pipe can also be set in the gap, and the spray pipe sprays the sample from the side to avoid blocking the sample by the spray pipe.

Each placement part shall indicate the basic temperature (without heating compensation) and UV illuminance under stable working conditions. When using, select the corresponding placement part according to the needs, set the required temperature, fix the sample sticker placement part, and keep the radiation source rotating, which is not only conducive to the uniform distribution of light and heat dissipation, but also better simulates the moving effect of light . After one stage of testing is completed, the sample can also be moved to another placement part manually or mechanically to complete other tests; multiple samples can be prevented at the same time.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and embodiments shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (7)

1. A low-energy artificial weather aging device, characterized in that it comprises a coaxial sample placement frame and a radiation source, the sample placement frame and the radiation source are in an inverted semi-conical shape, and there is a gap between the sample placement frame and the radiation source , the radiation source is rotatably set in the sample holder; The radiation source includes a rotating shaft, a supporting seat and a lamp board, the supporting seat is fixed on the rotating shaft, and the lamp board is arranged on the outer surface of the supporting seat; The lamp panel includes a substrate and an LED light source installed on the substrate; the LED light source includes at least a plurality of ultraviolet LED lamps, and the ultraviolet LED lamps include several types with different wavelengths, and the plurality of ultraviolet LED lamps form a Ultraviolet spectral composition; A plurality of cooling fins are evenly arranged radially on the outer surface of the substrate; The inner side of the sample placement rack is stepped, and when the inner side of the sample placement rack has multiple steps, the steps gradually approach the rotating shaft from top to bottom; the slope of each step is parallel to the lamp board, and the slope of the step is formed for placing and a place where the sample is fixed; The height of the cooling fin protruding from the substrate is not less than 1/20 of the minimum gap distance between the sample rack and the radiation source; The heat dissipation fins guide the heat to the side where the lamp bead is located, so that the heat dissipated by the heat dissipation fins can form part of the test environment required by the sample. 2. The low-energy artificial weathering device according to claim 1, wherein the LED light source also includes a non-ultraviolet light-emitting diode, and a plurality of ultraviolet LED lamps and non-ultraviolet light-emitting diodes form a light source that is more similar to solar radiation. spectral composition. 3. The low-energy artificial weather aging device according to claim 2, characterized in that, each layer of the sample placement rack is provided with an independently controlled electric heating temperature compensation device. 4. The low-energy artificial weather aging device according to claim 3, characterized in that a temperature detection device is provided on each layer of the sample placement rack. 5 . The low-energy artificial weathering device according to claim 4 , wherein an insulating material is provided on the outside of the sample rack. 6 . 6. The low-energy artificial weather aging device according to claim 1, characterized in that, at least a spraying device is provided on the sample placement rack. 7. The low-energy artificial weathering device according to claim 1, characterized in that the substrate is an aluminum substrate or a flexible circuit board that has undergone waterproof treatment.