KR102675077B1 - Air-coolded uv curing apparatus - Google Patents

Abstract

An air-cooled UV curing device is disclosed. The air-cooled UV curing device according to the present invention is a case having an overall square cross-sectional cylindrical shape, and an opening for emitting ultraviolet rays downward is formed on the lower surface, and an intake port through which external air can be introduced is formed on the upper surface. A right-angled flow path case is formed on the side with an exhaust port through which the incoming outside air can be discharged, an LED array is provided on the upper part of the opening of the right-angled flow path case and emits ultraviolet rays downward, and is in contact with the upper surface of the LED array and emits light in the direction of the LED array. It is formed to a size that closes the lower part of the internal hollow part of the right-angled flow path case to block the air flow, causing the air flowing in from the intake port to collide directly with the upper surface and then being discharged through the exhaust port on the side. A heat sink that emits conducted heat, a blower installed at the intake port of the right-angled flow path case to absorb heat while the outside air directly collides with the heat sink and then propel the outside air so that it is discharged through the side exhaust port of the right-angle flow path case, and the right-angle flow path case Controlling the intake air temperature sensor installed in the intake port, the exhaust temperature sensor installed in the exhaust port of the right angle flow path case, and the blower to maintain a constant wind speed, the temperature values of the intake air temperature sensor and the exhaust temperature sensor are read to determine the exhaust temperature and intake air temperature. It includes a control unit that calculates a temperature difference (ΔT), and a display that displays the temperature difference (ΔT) between the intake air temperature and exhaust temperature, or the exhaust temperature and intake air temperature, read by the control unit.

Description

Air-cooled UV curing device {AIR-COOLDED UV CURING APPARATUS}

The present invention relates to a UV curing device. More specifically, the present invention relates to a UV curing device, and more specifically, while cooling the heat sink of the LED array in an air-cooled manner by a blower, the user can obtain a rough estimate of the LED array without separating and checking the LED array from the UV curing device or measuring the total luminous flux. The light change power or lifespan can be checked and judged from the outside at any time, and the air-cooled type can automatically adjust the amount of power input to the LED array in response to a decrease in the light change power of the LED array to maintain the intensity of ultraviolet rays within a certain range. It is about UV curing equipment.

A UV curing device is used for UV curing of inks, coatings, or adhesives (hereinafter referred to as UV resins) containing a UV photoinitiator (ultraviolet photoinitiator). UV curable inks, coatings or adhesives contain monomers, oligomers and UV photoinitiators, and when UV is irradiated, polymerization and crosslinking reactions of the monomers and oligomers begin due to photoinitiation of the photoinitiator and are converted into polymers and hardened. For photoinitiation of UV resins, the wavelength of 280nm - 420nm (UV-A or UV-B) is mainly used.

Recently, LEDs have been manufactured to generate ultraviolet rays in a specific wavelength range (ultraviolet peaks at a specific frequency within the range of 280nm - 420nm) required for photoinitiation of UV resin with high efficiency and high output, and because their lifespan is very long, LEDs are widely used as UV light sources. It is used. Examples thereof are disclosed in Korean Patent Publication No. 10-1623299, Korean Patent Publication No. 10-1649931, etc.

For smooth photoinitiation of UV resin, an appropriate level of radiant flux is required. There are hundreds to tens of thousands of LED chips used in UV curing devices in one curing device, and their total output (full luminous flux) is 1 - 50KW (current UV LED output is 100mW ~ 1,200mW per chip, 9 LED chip COB) The type reaches approximately 12,000mW per board. At this time, the luminous flux is the total luminous flux proportional to the number of moles of the photoinitiator of the UV resin applied to the irradiated object.

Meanwhile, LEDs have a long lifespan, but as the period of use increases, the LED chip deteriorates, and as a result, the light conversion power of the entire LED array (the power converted into light among the input power) decreases. If the light conversion power of the entire LED array drops, the intensity of ultraviolet rays weakens, and if the intensity of ultraviolet rays weakens, photoinitiation cannot be achieved to an appropriate degree, and as a result, UV curing of the resin is insufficient or uneven. Therefore, in the UV curing device using LED, when the light conversion power of the LED decreases and the UV intensity becomes weak, the input power (voltage or current) must be increased to compensate for the UV intensity to a level where appropriate photoinitiation can be achieved. , when the critical lifespan is reached where the UV intensity does not increase even if the input power is increased, the entire LED array must be replaced from the UV curing device.

The above Registered Patent Publication No. 10-1623299 is a device for curing a large-area product coated with ultraviolet curable resin with UV LED, a light irradiation head including a plurality of LED modules with a heat sink interposed in the housing, the plurality of A power supply that is connected to the LED module and applies power, a cooling means that surrounds the heat sink of the LED module with a water-cooling jacket and forms a coolant circulation path toward the radiator, and maintains the heating temperature and light output of the LED module within the set range. It includes a control means, wherein the power supply is provided with a distributor to connect a plurality of LED modules in a series-parallel circuit to apply power, and the cooling means is a parallel circuit for each LED module to provide a coolant circulation path. The control means includes a temperature sensor that detects the coolant temperature of the light irradiation head, an optical sensor that detects the light output for each LED module, and a power supply and cooling means in response to the temperature and light output of the LED module. A UV LED curing device for large-area coating is disclosed, which is characterized by having a controller that varies the output.

Registered Patent Publication No. 10-1649931 includes a case, glass installed in the case, an LED module installed inside the case adjacent to the glass and emitting ultraviolet rays, and among the ultraviolet rays emitted from the LED module, the glass An ultraviolet detection unit that detects ultraviolet rays reflected from the ultraviolet rays is connected to the ultraviolet detection unit, and based on the amount of ultraviolet rays detected by the ultraviolet detection unit, adjusts the current applied to the LED module to emit A UV curing device including a control unit for controlling the amount of ultraviolet rays and a method for controlling the illuminance thereof are disclosed.

However, there is a method of attaching an optical sensor that detects light output to the LED module to measure the intensity of ultraviolet rays and varying the output of the power supply accordingly, or by installing glass on the front of the LED module and detecting the ultraviolet rays reflected from the glass. The ultraviolet illuminance control method that controls the input current based on the amount causes the ultraviolet ray intensity or luminous flux control of the UV curing device to be very inaccurate for the following reasons.

In order for the photoinitiation of UV resin to occur smoothly, an appropriate level of radiant flux is required. At this time, the luminous flux is the total luminous flux (number of moles) proportional to the number of moles of the photoinitiator of the UV resin applied to the irradiated object. The total light flux is determined by the light conversion power of the entire LED array relative to the input power.

On the other hand, the method of measuring the intensity of ultraviolet rays by attaching an optical sensor that detects light output to the LED module or installing glass on the front of the LED module and detecting the ultraviolet rays reflected from the glass to measure the amount of ultraviolet rays is an LED chip or LED chip. Since all on-board (COBs) are point light sources whose relative rad intensity with respect to the radiant angle is in the form of a parabola with the largest at the center, even if the illuminance is measured with an optical sensor, there is a difference at each measurement point. Because it is large, it cannot be said to be an effective method of measuring the light conversion power of the entire LED array. The distance between the light source and the object affected affects the intensity of ultraviolet rays. Additionally, the distance between the light source and the illuminance sensor or optical sensor also affects the measurement results. The closer an object or optical sensor is to a light source, the more difficult it is to receive uniform ultraviolet rays because a uniform radiation pattern cannot be obtained the closer it is to the LED array, which is a collection of point light sources. Therefore, it is difficult to achieve appropriate light initiation of UV resin by controlling the input power based on the illuminance or luminous flux measured at several points. Therefore, if the input power is controlled based on the illuminance of a specific point without controlling the input power based on the total light flux or the optical conversion power of the entire LED array to the input power, partial non-curing problems may occur from time to time.

Meanwhile, in order to control input power using the total luminous flux or light conversion power, it is necessary to measure the total luminous flux or light conversion power of the LED array installed in the UV curing device. In general, it is necessary to measure the total luminous flux of the light source. To do this, a large, spherical photometer that can accommodate the LED array installed in the UV curing device is needed. Because it is very difficult to install such a large spherical luminous flux integrally with the UV curing device, in order to measure the total luminous flux of the UV curing device, a large spherical luminous flux meter must be manufactured separately from the UV curing device and the total luminous flux can be measured. Each time, the LED array must be removed from the UV curing device and measured in a spherical photometer. However, this method of measuring total luminous flux for the LED array of a UV curing device is excessively expensive because a large, spherical luminous flux meter must be manufactured separately, and the LED array must be separated from the UV curing device each time the total luminous flux is measured. Work efficiency decreases significantly.

Korean Patent Publication No. 10-1623299 (Registration date: 2016.05.16) Korean Patent Publication No. 10-1649931 (Registration date: 2016.08.16)

The present invention was made to solve the problems of the conventional UV curing device described above. The first problem to be solved by the present invention is to separate the LED array from the UV curing device and check it by cooling the LED array in an air-cooled manner using a blower. The goal is to provide an air-cooled UV curing device that allows users of the UV curing device to check and judge the approximate light change power or lifespan of the LED array from the outside at any time without internal measurement.

The second problem that the present invention solves is to provide an air-cooled UV curing device that can maintain the intensity of ultraviolet rays within a certain range by automatically adjusting the amount of power input to the LED array in response to the decrease in the light change power amount of the LED array. there is.

The third problem that the present invention aims to solve is to provide an air-cooled UV curing device that can determine and inform the replacement time of the LED array.

The first object of the present invention described above is an air-cooled UV curing device, which is a case having an overall square cross-sectional cylindrical shape, and an opening through which ultraviolet rays can be emitted downward is formed on the lower surface, and an intake port through which external air can be introduced is formed on the upper surface. A right-angled flow path case is formed on the side with an exhaust port through which the incoming outside air can be discharged, an LED array is provided on the upper part of the opening of the right-angled flow path case and emits ultraviolet rays downward, and is in contact with the upper surface of the LED array and emits light in the direction of the LED array. It is formed to a size that closes the lower part of the internal hollow part of the right-angled flow path case to block the air flow, causing the air flowing in from the intake port to collide directly with the upper surface and then being discharged through the exhaust port on the side. A heat sink that emits conducted heat, a blower installed at the intake port of the right-angled flow path case to absorb heat while the outside air directly collides with the heat sink and then propel the outside air so that it is discharged through the side exhaust port of the right-angle flow path case, and the right-angle flow path case Controlling the intake air temperature sensor installed in the intake port, the exhaust temperature sensor installed in the exhaust port of the right angle flow path case, and the blower to maintain a constant wind speed, the temperature values of the intake air temperature sensor and the exhaust temperature sensor are read to determine the exhaust temperature and intake air temperature. This can be solved by including a control unit that calculates the temperature difference (ΔT) and a display that displays the temperature difference (ΔT) between the intake air temperature and exhaust temperature or the exhaust temperature and intake temperature read by the control unit.

The second task of the present invention described above is to provide a variable power supply unit capable of variably supplying power to the LED array, and the control unit operates the blower at a constant wind speed to inject air into the heat sink and generate air from the intake air temperature sensor. Reading the intake air temperature, calculating the air volume injected into the heat sink from the time of measuring the intake air temperature, and reading the exhaust temperature from the exhaust temperature sensor when the input air volume reaches the pre-calculated hollow volume of the right-angled flow path case. A step of calculating the temperature difference (ΔT) between the intake air temperature and the exhaust temperature based on the intake air temperature and exhaust temperature read from the intake air temperature sensor and the exhaust temperature sensor, and heat consumed as heat by the temperature difference (ΔT) and the input air volume. A step of calculating the conversion power amount, a step of calculating the UV light conversion power amount consumed for UV generation by the difference between the input power amount and the thermal conversion power amount, and if the calculated UV light conversion power amount is less than a preset reference light conversion power amount, the LED array This can be solved by performing a step of increasing the supplied power to increase the UV light conversion power amount to more than the standard light conversion power amount.

Here, the reference light conversion power amount is the light conversion power amount corresponding to the UV intensity required for UV curing. Among the amount of power input to the LED array, the amount of power converted to light is called light conversion power, and the amount of power converted to heat is called thermal conversion power.

The third task of the present invention described above is to further provide an alarm device for the end of use of the LED lamp array in the UV curing device, and if the temperature difference (ΔT) is more than a preset temperature difference limit, the control unit activates an alarm device for the end of use of the LED lamp array. It notifies the user when to replace the LED array by driving, or when the UV light conversion power amount is below the standard light conversion power amount, even if the power supplied to the LED array is increased to the preset limit power amount, the UV light conversion power amount remains above the standard light conversion power amount. If it does not rise, this can be solved by having the control unit drive the LED lamp array end-of-use alarm device to inform the user of the time to replace the LED array.

Some of the power input to the LED array is used as light conversion power and is emitted as ultraviolet rays, and the remainder is used as heat conversion power and is emitted as heat. The heat generated within the case housing the LED array is used to heat the air input into the case, and the temperature difference between the warmth of the air discharged from the case and the air input into the case is proportional to the amount of heat conversion power among the amount of power input to the LED array. . The amount of heat absorbed by the air can be converted into electric power.

According to the present invention, all external air sucked from the upper part of the right-angled flow path case by the blower collides with the heat sink, absorbs heat, and is discharged through the exhaust port on the side. Therefore, the exhaust air temperature measured by the exhaust temperature sensor at the exhaust port increases as the heat conversion power amount among the power inputs to the LED array increases. In addition, the difference between the exhaust air temperature measured by the exhaust temperature sensor and the input air temperature measured by the intake air temperature sensor is proportional to the amount of heat conversion power among the amount of power input to the LED array. Additionally, if the difference between the exhaust temperature and the intake air temperature is large, it can be determined that the life of the LED array has reached the end. Therefore, according to the present invention, the operator of the UV curing device can check and determine the approximate amount of light change power of the LED array or the lifespan of the LED array from the outside at any time by visually checking the exhaust temperature and intake temperature or the temperature difference between them displayed on the display. and can respond.

According to the present invention, the UV curing device operator can check, judge, and respond to the approximate light change power or lifespan of the LED array from the outside at any time without separating and checking the LED array from the UV curing device or measuring the total luminous flux. Therefore, it is possible to prevent UV curing defects in products due to a decrease in the light conversion power of the LED array or a decrease in the intensity of UV rays.

In addition, according to the present invention, the control unit calculates the thermal conversion power amount and the UV light conversion power amount using the temperature difference between the intake air temperature and the exhaust temperature, and when the UV light conversion power amount is less than the standard light conversion power amount, the light conversion power amount of the LED array is reduced. In response, the intensity of ultraviolet rays can be maintained within a certain range by automatically adjusting the amount of power input to the LED array, so the amount of ultraviolet light required for light initiation of the UV resin can be adjusted and maintained at an appropriate level, and the intensity of ultraviolet rays decreases. It can automatically block UV curing defects in products.

In addition, if the temperature difference (ΔT) between the exhaust temperature and the intake air temperature is greater than the preset limit temperature difference, the control unit operates the LED lamp array end-of-use alarm device to inform the user of the time to replace the LED array, or the UV light conversion power amount is set to the standard light conversion level. Below the power amount, if the UV light conversion power amount does not rise above the standard light conversion power amount even if the power supply of the LED array is increased to the preset limit power amount, the control unit operates the LED lamp array end-of-use alarm device to determine when to replace the LED array. Because it notifies the user, it has the effect of being able to replace the LED lamp array at the appropriate time without having to worry about the replacement period.

Figure 1 is a perspective view of the main body of the air-cooled UV curing device according to the present invention.
Figure 2 is a side cross-sectional view of the air-cooled UV curing device according to the present invention.
Figure 3 is a front cross-sectional view of the air-cooled UV curing device according to the present invention.
Figure 4 is a configuration diagram showing control means for the LED array.
Figure 5 is a control flow chart for the LED array.

Hereinafter, specific examples of the air-cooled UV curing device according to the present invention will be described in detail with reference to the attached drawings.

As shown in Figures 1 to 3, the air-cooled UV curing device according to the present invention includes a right-angled flow path case (1) accommodating the LED array (23) at the bottom. The right angle flow path case (1) is a hexahedral case with an overall square cross-sectional cylindrical shape, and an opening (3) that can emit ultraviolet rays downward is formed on the lower surface, and an intake port (13) that allows external air to flow in is formed on the upper surface. An exhaust port 7 is formed on the side through which the incoming outside air can be discharged by changing its direction by 90 degrees. The LED array 23 is provided above the opening of the right-angled channel case 1 and radiates ultraviolet rays downward. The LED array 23 of the present invention is one in which a plurality of LEDs (LED packages (chips) or modules (COB)) 19 are mounted on a PCB board 21 in certain rows and columns.

A heat sink 25 is provided directly below the exhaust port 7 in the right angle flow path case 1. The intake port 13 is provided with a blower 11 that introduces external air into the internal hollow portion 5 of the right angle flow path case 1. Accordingly, the outside air introduced by the blower 11 collides with the upper surface of the heat sink 25, then changes direction by 90° and is discharged through the exhaust port 7. The heat sink 25 is installed in contact with the upper surface of the LED substrate 21 of the LED array 23 to conduct most of the heat emitted from the LED array 23. Therefore, the outside air sucked in by the blower 11 absorbs the heat generated from the UV LED array 23 while colliding with the heat sink 25 and is then discharged through the exhaust port 7, so that the heat emitted from the LED array 23 Most of the heat is used to heat the outside air, and the heat sink 25 and the LED array 23 adjacent to it are effectively cooled.

One of the features of the present invention is that the heat sink 25 is in contact with the upper surface of the LED array 23, and the size of the heat sink 25 is adjusted to block the air flow in the direction of the LED array 23. It is formed to a size that closes the lower part of the internal hollow part (5) of the case (1), so that the air flowing in from the intake port (13) directly collides with the upper surface of the heat sink (25) and then blows through the side exhaust port (7) of the right angle flow path case (1). ) to induce all of it to be discharged. By doing this, the heat conducted from the LED array 23 to the heat sink 25 by the introduced air can be discharged very effectively. Additionally, in this configuration, the air can absorb most of the heat generated from the LED array 23.

The blower (11) is installed at the intake port (13) of the right-angled flow path case (1), absorbs heat as outside air directly impacts the heat sink (25), and then blows it to the side exhaust port (7) of the right-angled flow path case (1). Promote outside air so that it is discharged.

Another feature of the present invention is that an intake air temperature sensor 15 is installed at the intake port 13 of the right-angle passage case 1, and an exhaust temperature sensor 17 is installed at the exhaust port 7 of the right-angle passage case 1. By installing it, the intake temperature and exhaust temperature are used as indicators for the light conversion power of the LED array.

As shown in FIG. 4, for this purpose, the present invention controls the blower 11 to maintain a constant wind speed, reads the temperature values of the intake air temperature sensor 15 and the exhaust temperature sensor 17, and A control unit 27 that calculates a temperature difference (ΔT) between the temperature and the intake air temperature, and a display 31 that displays the temperature difference (ΔT) between the intake air temperature and the exhaust temperature or the exhaust temperature and the intake air temperature read by the control unit 27. is provided so that the operator of the UV curing device can check the temperature difference (ΔT) between the intake air temperature sensor 15 and the exhaust temperature sensor 17, or the exhaust temperature and the intake air temperature at any time.

According to the present invention, all external air sucked from the upper part of the right angle flow path case (1) by the blower (11) collides with the heat sink (25), absorbs heat, and is discharged through the exhaust port (7) on the side. Accordingly, the exhaust air temperature measured by the exhaust temperature sensor 17 at the exhaust port 7 increases as the heat conversion power amount among the power inputs to the LED array 23 increases. In addition, the difference between the exhaust air temperature measured by the exhaust temperature sensor 17 and the input air temperature measured by the intake air temperature sensor 15 is proportional to the amount of heat conversion power among the amount of power input to the LED array 13. Additionally, if the difference between the exhaust temperature and the intake air temperature is large, it can be determined that the life of the LED array has reached the end. Therefore, according to the present invention, the operator of the UV curing device can check and determine the approximate amount of light change power of the LED array or the lifespan of the LED array from the outside at any time by visually checking the exhaust temperature and intake temperature or the temperature difference between them displayed on the display. and can respond.

As shown in Figures 4 and 5, another feature of the present invention is to provide a variable power supply unit 29 that can variably supply power to the LED array 23, and the control unit 27, The UV light conversion power is calculated using the temperature difference (ΔT) between the intake air temperature and the exhaust temperature and the air volume corresponding to the volume of the hollow part (5) of the right angle flow path case (1), and based on the calculated UV light conversion power, the LED By variably adjusting the power input to the array 23, the intensity of ultraviolet rays emitted from the LED array is maintained at a level necessary for photoinitiation of the UV resin.

As shown in FIG. 5, for this purpose, the control unit 27 operates the blower 11 at a constant wind speed to inject air into the heat sink 25 and reads the intake air temperature from the intake air temperature sensor 15. In step 101, the air volume inputted into the heat sink 25 is calculated from the point of measuring the intake air temperature (102), and the input air volume reaches the pre-calculated volume of the hollow portion 5 of the right angle flow path case 1. In the step 103 of reading the exhaust temperature from the exhaust temperature sensor, the temperature difference (ΔT) between the intake air temperature and the exhaust temperature is calculated based on the intake air temperature and exhaust temperature read from the intake air temperature sensor 15 and the exhaust temperature sensor 17. ), a step (104) of calculating the temperature difference (ΔT) and the amount of input wind, and a step (105, 106) of calculating the amount of heat conversion power consumed as heat, and the UV amount consumed in generating UV by the difference between the amount of input power and the amount of heat conversion power. In the step 107 of calculating the photoconversion power amount, if the calculated UV photoconversion power amount is less than a preset standard photoconversion power amount (the photoconversion power amount required for photoinitiation of the UV resin), the supply power of the LED array is increased to produce UV light. A step 108 of increasing the conversion power amount to more than the standard optical conversion power amount is performed. Since the standard photoconversion power amount is the amount of photoconversion power required for photoinitiation of the UV resin, it may vary depending on the total amount of photoinitiator of the UV resin. The input air volume can be calculated by multiplying the cross-sectional area of the entire blower duct 9 and the wind speed of the blower 11, which is kept constant by the control unit 27. The total amount of heat is calculated from the temperature difference (ΔT) between the measured intake and exhaust temperatures and the specific heat of the air. The amount of heat conversion is calculated by converting the total amount of heat (cal) obtained in this way into Joule units (1 cal = 4.18J). It is a value.

The control unit 27 calculates the thermal conversion power and UV light conversion power using the temperature difference between the intake air temperature and the exhaust temperature, and when the UV light conversion power is less than the standard light conversion power, the LED array is operated in response to a decrease in the light conversion power of the LED array. Since the intensity of ultraviolet rays can be maintained within a certain range by automatically adjusting the amount of power input to (23), the amount of ultraviolet light required for photoinitiation of UV resin can always be adjusted and maintained at an appropriate level, and It can automatically prevent UV curing defects in products and improve the quality of UV resin coated products. In particular, by doing this, the power input to the LED array 23 can be controlled by using the total luminous flux or amount of light emitted from the LED array 23 as a parameter, rather than the illuminance value of a specific local point, Accordingly, it is possible to irradiate a total amount of ultraviolet rays suitable for the total amount of photoinitiator of the UV resin.

As can be seen by referring back to FIG. 4, another feature of the present invention is to further provide an LED lamp array end-of-use alarm device 33 in the UV curing device, and the temperature difference ΔT is greater than or equal to a preset limit temperature difference. In this case, the control unit 27 drives the LED lamp array 23 end-of-use alarm device 33 to inform the user of the replacement time for the LED array 23, or when the UV light conversion power amount is less than the standard light conversion power amount, Even if the amount of power supplied to the LED array 23 is increased to the preset limit power amount, if the UV light conversion power amount does not rise above the reference light conversion power amount, the control unit 27 sets off an end-of-use alarm device for the LED lamp array 23 ( 33) to inform the user when to replace the LED array. The power limit is determined by the power specifications of the LED array used in the UV curing device.

Therefore, users of UV curing devices can replace the LED lamp array at an appropriate time without having to worry about the replacement period, thereby preventing product defects due to poor UV curing.

1: Right angle flow path case
3: opening
5: Heavy Industries Department
7: exhaust port
9: Blower duct
11: blower
13: intake port
15: Intake air temperature sensor
17: Exhaust temperature sensor
19:LED
21: LED board
23: LED array
25: heat sink
27: control unit
29: Variable power supply unit
31: display
33: End of use alarm device

Claims (3)

It is a case with an overall square cross-section and a cylindrical shape. An opening is formed on the bottom to emit ultraviolet rays downward, an intake port is formed on the top to allow external air to flow in, and an exhaust port is formed on the side to allow the inflow of external air to be discharged. Formed right-angled flow path case;
an LED array provided above the opening of the right-angled channel case to radiate ultraviolet rays downward;
It is in contact with the upper surface of the LED array and is formed to a size that closes the lower inner hollow part of the right-angled flow path case to prevent air flow in the direction of the LED array, so that the air flowing in from the intake port directly impacts the upper surface and then blows out on the side. a heat sink that dissipates heat conducted from the LED array into the incoming air while guiding it to be discharged through the exhaust port;
A blower installed at the intake port of the right-angled flow path case to absorb heat while the outside air directly collides with the heat sink and then propel the outside air so that it is discharged through the side exhaust port of the right-angle flow path case;
An intake air temperature sensor installed at the intake port of the right angle flow path case;
An exhaust temperature sensor installed at the exhaust port of the right angle flow path case;
a control unit that controls the blower to maintain a constant wind speed, reads temperature values of the intake air temperature sensor and the exhaust air temperature sensor, and calculates a temperature difference (ΔT) between the exhaust temperature and the intake air temperature; and
An air-cooled UV curing device comprising a display that displays the temperature difference (ΔT) between the intake air temperature and exhaust temperature, or the exhaust temperature and intake temperature, read by the control unit.
According to paragraph 1,
The LED array is provided with a variable power supply unit that can variably supply power,
The control unit,
Operating the blower at a constant wind speed to inject air into the heat sink and reading the intake air temperature from the intake air temperature sensor;
Calculating the air volume input to the heat sink from the time of measuring the intake air temperature, and reading the exhaust temperature from the exhaust temperature sensor when the input air volume reaches the pre-calculated hollow volume of the right-angled flow path case;
Obtaining a temperature difference (ΔT) between the intake air temperature and the exhaust temperature based on the intake air temperature and exhaust temperature read from the intake air temperature sensor and the exhaust temperature sensor;
Calculating the amount of heat conversion power consumed as heat based on the temperature difference (ΔT) and the input air volume;
Calculating the amount of UV light conversion power consumed for UV generation by the difference between the input power amount and the heat conversion power amount;
If the calculated UV light conversion power amount is less than the preset reference light conversion power amount, increasing the supply power of the LED array to raise the UV light conversion power amount to more than the standard light conversion power amount; air-cooled UV curing device characterized in that performing the step; .
According to paragraph 2,
An LED lamp array end-of-use alarm device is further provided in the UV curing device, and if the temperature difference (ΔT) is greater than a preset limit temperature difference, the control unit drives the LED lamp array end-of-use alarm device to notify the user of the time to replace the LED array. Or, if the UV light conversion power amount is below the standard light conversion power amount and the UV light conversion power amount does not increase above the standard light conversion power amount even if the power supply of the LED array is increased to the preset limit power amount, the control unit controls the LED lamp. An air-cooled UV curing device that operates an array end-of-use alarm device to notify the user when to replace the LED array.

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