KR20180013834A - Weather resistance tester having improvement of light uniformity - Google Patents

Abstract

The present invention relates to a weather resistance tester for improving uniformity of a light irradiation surface. The weather resistance tester for improving uniformity of a light irradiation surface comprises: a main body having a chamber therein; a plurality of ultraviolet lamps provided on an upper part of the chamber of the main body; a sample loading plate provided on a lower surface of the chamber of the main body to be able to slide, and on which the samples are placed; a sliding unit provided between the sample loading plate and the lower surface of the chamber of the main body to allow the sample loading plate to be able to slide; injection nozzles provided above the upper part of the chamber of the main body to inject deionized water; a deionized water supply device for supplying the deionized water to the injection nozzles; and a humidity sensor and a temperature sensor provided inside the main body. According to the present invention, the weather resistance tester for improving uniformity of a light irradiation surface enables the sample to be uniformly irradiated, an operation to mount the sample to be facilitated, and structure to be simplified.

Description

TECHNICAL FIELD [0001] The present invention relates to a weather resistance tester having improved uniformity of an optical surface,

The present invention relates to a weather resistance tester in which the uniformity of an optical surface is improved.

Various chemical products such as plastics, rubbers, films, coatings, paints, and adhesives often contain a polymer material in which organic elements such as carbon, hydrogen, oxygen, and nitrogen are covalently bonded. Therefore, in a chemical product thereof, a progressive degradation reaction proceeds by light and heat such as ultraviolet rays. Such chemical products undergo degradation reaction due to light and heat such as ultraviolet rays. Therefore, it is the main factor that determines the lifetime of the product according to the rate of the degradation reaction of the chemical, so understanding the exposure amount and exposure frequency of ultraviolet rays and thermal energy that determine the rate of the degradation reaction is a basic design element for the life of the product .

A variety of industrial products in which chemical degradation proceeds by exposure to sunlight outdoors, such as automobiles, ships, rail vehicles, military materials, building materials, civil engineering materials, road and marine installations, electrical and radio facilities, , Solar cells, wind power facilities, and agricultural products, outdoor and indoor weathering resistance tests are carried out by various artificial light sources.

The weathering test of the product against the light-induced thermal degradation under daylight exposure environment is carried out by the accelerated weathering tester equipped with the artificial light source with excellent solar simulatedness. However, since the test conditions and the actual conditions of use of the accelerated weathering tester are not the same, it is technically difficult to predict the photothermal life in the actual use environment through the accelerated test results. One of the most challenging of these technical difficulties is the condensation of ultraviolet light from sunlight that causes photodegradation of polymeric materials. It is known that ultraviolet rays of sunlight, which cause photodegradation of polymer materials, have different atmospheric penetration and reflection characteristics than visible or near infrared rays, which are used as energy sources in the solar energy field.

Because of this characteristic of ultraviolet ray, ultraviolet ray of sunlight has a characteristic that scattering characteristic during the process of passing through the atmosphere is large, so that the direct light component is relatively less than visible light and the reflection light is not well converged as a general reflector which collects visible light. In the case of the prior art related to the accelerated weathering test equipment for outdoor use, the light-emitting test sample does not directly face the sun and only the sunlight reflected by the sunlight is used. In the cloudy weather or cloudy weather, There is a problem that it is difficult to expect a light-condensing efficiency.

An example of a conventional weather resistance tester is provided with an artificial light source inside the main body, a rugby ball-shaped mount stand to surround the artificial light source, and a spray nozzle inside the mount stand. However, in the conventional weathering tester, since the stand is formed in a rugby ball shape so that the artificial light source is uniformly irradiated, it is inconvenient to mount the specimen on the stand and sprayed uniformly on the specimens placed on the stand when water is sprayed through the spray nozzle And the structure is complicated.

An object of the present invention is to provide a weathering tester in which the uniformity of an optical surface to uniformly irradiate an artificial light source onto a specimen and uniformly spray water on the specimen is improved.

Another object of the present invention is to provide a weather resistance tester which improves the uniformity of an optical surface for facilitating the operation of mounting a specimen and simplifying the structure.

In order to achieve the object of the present invention, A plurality of ultraviolet lamps provided on the chamber of the main body; A specimen mounting table slidably mounted on a lower surface of the chamber of the main body and on which specimens are placed; A sliding unit provided between the specimen table and the bottom surface of the main chamber to allow the specimen table to be slidable; Injection nozzles located above the main chamber and spraying pure water; A pure water supply device for supplying pure water to the injection nozzles; An ultraviolet sensor positioned inside the main chamber to sense the intensity of ultraviolet light generated by the ultraviolet lamps; And a humidity sensor and a temperature sensor located inside the main chamber, wherein the uniformity of the optical surface is improved.

The ultraviolet lamps are preferably arranged in a row in the horizontal direction.

Preferably, the spray nozzles are located between the ultraviolet lamps and are located above the spray nozzles.

It is preferable that the specimensubstrate is formed in a flat plate shape.

It is preferable that a door is provided on the front surface of the main body.

The ultraviolet sensor preferably has a plurality of ultraviolet lamps so as to correspond one to one with the number of ultraviolet lamps.

Preferably, the ultraviolet sensors are disposed on a wall surface of the chamber front surface when the door is opened or closed.

The humidity sensor and the temperature sensor are preferably located next to the specimen placed on the specimen table.

A reflector for reflecting ultraviolet rays generated from an ultraviolet lamp in a downward direction is provided on the upper side of the ultraviolet lamp, the reflector includes a curved reflector portion having a length corresponding to the length of the ultraviolet lamp and surrounding an upper portion of the ultraviolet lamp, And a side reflective curved plate portion extending from both ends of the reflector portion and reflecting the ultraviolet rays to the side surface of the ultraviolet lamp.

Since the ultraviolet lamps of the artificial light source are arranged in a line on the upper part of the chamber and the test piece is mounted on the specimen pallet on the bottom surface of the chamber, ultraviolet rays generated from the ultraviolet lamps are transferred to the specimen pallet Are uniformly irradiated to the specimens placed on the test specimen. In particular, when the reflector provided on the upper portion of the ultraviolet lamp includes the curved reflector portion and the side reflective curved plate portion, the ultraviolet lamp is irradiated intensively on the specimen without being irradiated onto the side wall of the main body.

In addition, the present invention is equipped with an ultraviolet ray sensor under each of the ultraviolet lamps to detect the intensity of light generated by the ultraviolet lamps, and controls each power supply device so that a constant light energy can be maintained in each ultraviolet lamp. The amount of ultraviolet energy is uniformly generated in the lamp. As a result, the amount of ultraviolet energy can be uniformly irradiated to the entire specimens.

In addition, since the spray nozzles are provided on the upper part of the chamber to spray the pure water to the specimens placed on the specimen mounting table, pure water is uniformly sprayed on the specimens, so that the specimens can be uniformly tested.

In addition, the present invention is advantageous in that the specimen mounting base on which the specimen is placed is in the form of a flat plate, and the specimen mounting base is slidable, so that it is convenient to load the specimen on the specimen mounting base. Further, .

According to the present invention, the humidity sensor and the temperature sensor are disposed inside the main chamber, respectively. The humidity sensor detects the humidity and the temperature sensed by the temperature sensor. The humidity and the temperature The measurement precision is increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an embodiment of a weather resistance tester in which the uniformity of an optical surface is improved,
2 is a side view showing an embodiment of a weather resistance tester in which the uniformity of an optical surface is improved,
3 is a front sectional view showing an ultraviolet lamp and a reflector constituting an embodiment of a weather resistance tester in which the uniformity of the light reflection surface according to the present invention is improved,
4 is a sectional view showing an ultraviolet lamp constituting an embodiment of a weather resistance tester in which the uniformity of an optical surface according to the present invention is improved.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a weather resistance tester in which the uniformity of an optical surface according to the present invention is improved will be described with reference to the accompanying drawings.

1 is a front view showing an embodiment of a weather resistance tester in which the uniformity of an optical surface is improved according to the present invention. 2 is a side view showing an embodiment of a weather resistance tester in which the uniformity of the light reflection surface according to the present invention is improved.

1 and 2, an embodiment of a weather resistance tester in which the uniformity of an optical surface according to the present invention is improved includes a main body 100, ultraviolet lamps 200, a specimen table 300, Unit 400, injection nozzles 500, a pure water supply device 600, an ultraviolet sensor (not shown), a temperature sensor S1, and a humidity sensor S2.

The main body 100 is formed in a hexahedron shape so as to have an inner chamber C, and has a front opening. That is, the main body 100 includes an upper plate portion, a lower plate portion, a left plate portion, a right plate portion, a front plate portion, and a rear plate portion, and the front plate portion is opened except for a part of each of the upper and lower portions (refer to FIG. 1) . A door 110 for opening and closing an open portion of the front plate portion of the main body 100 is provided on the front plate portion of the main body 100 and one side of the door 110 is hinged to one side of the front plate portion of the main body 100 .

The ultraviolet lamps 200 are provided above the chamber C of the main body 100. As shown in FIG. 3, the ultraviolet lamps 200 are provided with a reflector 700 for reflecting the ultraviolet rays generated from the ultraviolet lamps 200 downward on the upper side of the ultraviolet lamps 200.

The ultraviolet lamps 200 are arranged in a line in the horizontal direction. That is, it is preferable that the ultraviolet lamps 200 are arranged at a predetermined interval in the direction of the right side plate portion from the left side plate portion of the main body 100. The ultraviolet lamps 200 are each connected to a power supply unit for supplying power.

4, the ultraviolet lamp 200 includes a quartz tube 210 having a light emitting space therein, a filament 220 disposed inside the light emitting space of the quartz tube 210, a filament 220 The quartz tube 210 is connected to external power supply lines. The quartz tube 210 is connected to external power supply lines. As an example of the filament 220, the filament 220 may be a volumetric filament. The volumetric filament 220 includes a tubular support 221 and a graphite fiber tube 222 surrounding the support 21. The support body 21 is preferably a quartz tube formed of a cylindrical tube. It is preferable that the thickness of the support 221 is uniform. The graphite fiber tube 222 is preferably formed as a cylindrical tube. The thickness of the graphite fiber tube 222 is preferably uniform. The outer diameter of the support body 221 and the inner diameter of the graphite fiber tube 222 are preferably the same. The graphite fiber tube 222 may be formed of a polygonal tube. The side-by-side fiber tube 222 is preferably a graphite fiber fabric woven of graphite fibers.

The reflector 700 includes a curved reflector 710 having a length corresponding to the length of the ultraviolet lamp 200 and surrounding the upper portion of the ultraviolet lamp 200 and a curved reflector 710 extending from both ends of the curved reflector 710, And a side reflective curved plate portion 720 that reflects the ultraviolet light irradiated to the side surface of the lamp 200. [ The curved reflector portion 710 of the reflector 700 reflects ultraviolet rays generated from the ultraviolet lamp 200 downward and reflects ultraviolet rays generated from both ends of the ultraviolet lamp 200 at both side reflective curved plate portions 720 So that ultraviolet rays generated in the ultraviolet lamp 200 can be collected and collected in one place.

The specimen mounting table 300 is slidably provided on the bottom surface of the chamber C of the main body 100. The specimens are placed on the specimen stage 300. The specimensubstrate 300 has a flat plate shape.

The sliding unit 400 is provided between the specimen mounting table 300 and the lower surface of the chamber C of the main assembly 100 to allow the specimen mounting table 300 to be slidable. The sliding unit 400 includes a plurality of guide rods 410 provided on the bottom plate portion of the main body 100 and a slider slidably coupled to the guide rods 410 420). The guide rods 410 are positioned in the longitudinal direction of the main body 100 in the longitudinal direction. The specimen mounting table 300 is coupled to the upper portion of the sliders 420. When the specimen mounting table 300 is pulled forward while the specimen mounting table 300 is positioned inside the chamber C of the main body 100, the specimen mounting table 300 is slid along the guide rods 410 and exposed to the outside of the main body 100, The sample stage 300 is slid along the guide rods 410 and enters the chamber C of the main body 100 when the stage 300 is pushed.

The injection nozzles 500 are located in the upper part of the chamber C of the main body 100 to inject pure water. The injection nozzles 500 are located between the two ultraviolet lamps 200. The injection nozzles 500 are positioned below the ultraviolet lamps 200, respectively.

The pure water supply device 600 supplies pure water to the injection nozzles 500. The pure water supply device 600 includes a pure water tank 510 in which pure water is stored, a pure water tank 510 and the spray nozzles 500 to connect the spray nozzles 500 with pure water A pump (not shown) connected to the pure water supply pipe 520 and a valve unit (not shown) mounted on the pure water supply pipe 520 to block or supply the flow of pure water. The pure water supply pipe 420 is preferably located on the upper plate side of the main body 100.

The ultraviolet ray sensor detects the intensity of ultraviolet light generated in each of the ultraviolet lamps 200 located inside the main chamber. It is preferable that the ultraviolet ray sensor has a plurality of ultraviolet ray sensors 200 so as to correspond one to one with the number of the ultraviolet ray lamps 200. It is preferable that the ultraviolet sensors are located on the wall surface of the front surface of the chamber C when the door is opened or closed.

The humidity sensor S2 is located in the chamber C of the main body 100 and senses the humidity inside the chamber C of the main body 100. [ It is preferable that the humidity sensor S2 is located next to the specimen placed on the specimen table 300. [

The temperature sensor S1 is located in the chamber C of the main body 100 and senses the temperature inside the chamber C of the main body 100. [ It is preferable that the temperature sensor S1 is located next to the specimen placed on the specimen table 300. [

Hereinafter, the function and effect of the weather resistance tester in which the uniformity of the light reflection surface according to the present invention is improved will be described.

First, the specimen mounting table 300 is pulled out of the chamber C of the main body 100 while the door 110 is opened. Then, the specimens are arranged on the specimen stage 300. At this time, it is preferable to arrange the specimens in a square matrix on the specimen mounting table 300. The specimens are loaded on the specimen mounting table 300 and then the specimen mounting table 300 is pushed into the chamber C of the main body 100 and the door 110 is closed. The door 110 is closed to seal the chamber C of the main body 100 and power is supplied to the ultraviolet lamps 200 to generate ultraviolet rays from the ultraviolet lamps 200. [ Ultraviolet rays generated from the ultraviolet lamps 200 are directly irradiated onto the specimens and ultraviolet rays irradiated toward the upper plate portion of the main body 100 are reflected by the reflector 700 and irradiated on the specimens. The pure water in the pure water tank 510 is supplied to the injection nozzles 500 through the pure water supply pipe 520 by operating the pump of the pure water supply device 600 and opening the valve unit. Pure water supplied to the spray nozzles 500 is sprayed downward through the spray nozzles 500 and sprayed onto the specimen. The operation of irradiating the specimens with ultraviolet light and the operation of spraying pure water on the specimens can be performed simultaneously or selectively. The ultraviolet sensors sense the light intensity generated by the ultraviolet lamps 200 and control the power supply device so that uniform light intensity is generated in the ultraviolet lamps 200 due to detection of the ultraviolet sensors.

As described above, according to the present invention, the ultraviolet lamps 200, which are artificial light sources, are arranged in a row on the upper part of the chamber C and the specimen mounting table 300 having a flat plate shape is provided on the lower surface of the chamber C, 300, ultraviolet rays generated from the ultraviolet lamps 200 are uniformly irradiated onto the specimens placed on the specimen mounting table 300. Particularly when the reflector 700 provided on the upper part of the ultraviolet lamp 200 includes the curved reflector 710 and the side refracted curved plate 720, The light is intensively irradiated onto the specimens without being irradiated on the side wall, thereby increasing the light efficiency.

In addition, the present invention is characterized in that an ultraviolet ray sensor (not shown) is provided under each of the ultraviolet lamps 200 to sense the intensity of light generated by the ultraviolet lamps 200, So that the amount of ultraviolet energy is uniformly generated in the ultraviolet lamp 200. As a result, the amount of ultraviolet energy can be uniformly irradiated to the entire specimens.

Since the injection nozzles 500 are provided on the upper part of the chamber C to spray the pure water to the specimens placed on the specimen mounting table 300, pure water is uniformly sprayed on the specimens, You can test it.

The present invention is advantageous in that it is convenient to load specimens on the specimen stage 300 because the specimen stage 300 on which the specimen is placed is in the form of a flat plate and the specimen stage 300 is slidable, The mounting table 300 is formed in a flat plate shape to simplify the structure.

The humidity sensor S2 and the temperature sensor S1 are disposed inside the chamber C of the main body 100 so as to be positioned on the side of the specimen so that the humidity detected by the humidity sensor S2, The temperature sensed by the temperature sensor S1 directly measures the humidity and temperature acting on the specimen, thereby increasing the measurement accuracy.

100; A main body 200; Ultraviolet lamp
300; Specimen loading table 400; Sliding unit
500; Injection nozzle 600; Pure feeder
700; Reflector

Claims (7)

A body having a chamber therein;
A plurality of ultraviolet lamps provided on the chamber of the main body;
A specimen mounting table slidably mounted on a lower surface of the chamber of the main body and on which specimens are placed;
A sliding unit provided between the specimen table and the bottom surface of the main chamber to allow the specimen table to be slidable;
Injection nozzles located above the main chamber and spraying pure water;
A pure water supply device for supplying pure water to the injection nozzles;
An ultraviolet sensor positioned inside the main chamber to sense the intensity of ultraviolet light generated by the ultraviolet lamps; And
And a humidity sensor and a temperature sensor located inside the main chamber, wherein the uniformity of the optical surface is improved. Wherein the ultraviolet lamps are arranged in a row in a horizontal direction, and are positioned above the injection nozzle, wherein the uniformity of the optical surface is improved. Wherein the spray nozzles are located between the ultraviolet lamps. Wherein the specimen mounting board is formed in a flat plate shape, and the uniformity of the optical surface is improved. Wherein a door is provided on a front surface of the main body, and the uniformity of the optical surface is improved. Wherein the humidity sensor and the temperature sensor are located beside the specimen placed on the specimen mounting table. A reflector for reflecting ultraviolet rays generated from an ultraviolet lamp in a downward direction is provided on the upper side of the ultraviolet lamp, the reflector includes a curved reflector portion having a length corresponding to the length of the ultraviolet lamp and surrounding an upper portion of the ultraviolet lamp, And a side reflective curved plate portion extending from both ends of the reflector portion to reflect ultraviolet rays to the side surface of the ultraviolet lamp, wherein the uniformity of the optical surface is improved.

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