CN108361561A - Ultraviolet leds light supply apparatus - Google Patents

Abstract

The invention relates to an ultraviolet LED light source device, which includes an LED light source module and a heat dissipation module. The LED light source module includes a substrate and LED light source units arranged on the substrate and arranged in an array. The substrate is arranged on the The heat dissipation module further includes an oxygen-free gas source, and the oxygen-free gas source is used to blow oxygen-free gas to the irradiated surface of the LED light source module to create an oxygen-free environment on the irradiated surface of the LED light source module. Since the above-mentioned ultraviolet light LED light source device is provided with an oxygen-free gas source, when ultraviolet light is irradiated, the oxygen-free gas source blows the oxygen-free gas to the irradiation surface, which can dilute the oxygen concentration in the upper space of the irradiation surface, and continuous blowing can reduce Oxygen concentration is reduced to very low levels so that an oxygen-free environment can be created. When the ultraviolet ray is irradiated on the irradiated surface, ozone will not be generated in an oxygen-free environment, thereby ensuring the quality of ultraviolet irradiation and curing.

Description

Ultraviolet LED light source device

technical field

The invention relates to an LED light source, in particular to an ultraviolet LED light source device.

Background technique

Ultraviolet light LED light source devices are mostly used in processes that adopt ultraviolet light irradiation and curing, such as photolithography curing and printing curing processes.

Because ultraviolet rays can cause the ionization of oxygen in the air, ozone is produced. The activity of ozone is higher, and ozone will be generated in the area where the ultraviolet energy gathers, that is, the ultraviolet irradiation surface, and this is the area where the cured material is located. In some processes, such as printing processes, some printing materials will be oxidized by ozone, resulting in a lower printing pass rate. Ozone also absorbs and blocks UV rays, making UV energy exposure less effective.

In addition, in the printing process, the ultraviolet LED light source usually needs to provide a high-density and high-energy light source to realize the scanning irradiation curing process. However, the traditional UV LED light source generally has the problems of insufficient light concentration and insufficient long-distance high-density and high-energy.

Contents of the invention

Based on this, it is necessary to provide an ultraviolet LED light source device that can prevent ultraviolet rays from contacting with oxygen to generate ozone and also absorb and block ultraviolet rays during irradiation, reducing the irradiation efficiency of ultraviolet energy and oxidizing cured materials.

An ultraviolet LED light source device, including an LED light source module and a heat dissipation module, the LED light source module includes a substrate and LED light source units arranged on the substrate and arranged in an array, the substrate is arranged on the heat dissipation module , further comprising an oxygen-free gas source, the oxygen-free gas source is used to blow oxygen-free gas to the irradiated surface of the LED light source module to create an oxygen-free environment on the irradiated surface of the LED light source module.

In one of the embodiments, the oxygen-free gas source is arranged inside the heat dissipation module, and blows gas outward through an air outlet arranged on the heat dissipation module.

In one of the embodiments, the air outlet is arranged between the LED light source modules.

In one of the embodiments, it further includes a light cover provided on all the LED light source modules, and the air outlet is provided outside the light cover.

In one embodiment, the cross section of the heat dissipation module is arched, one side of the substrate of the LED light source module protrudes toward the inner concave surface of the heat dissipation module, and a plurality of LED light source units are arranged on one side, and a plurality of LED light source units are arranged on the substrate. The surface of the light source unit is in the shape of multi-plane continuous bending, so that the cross-section is an arch shape with multi-sided continuous bending, so that the light emitted by the multiple LED light source units is concentrated to form a linear light spot.

In one embodiment, the gas is nitrogen, an inert gas, a mixed gas of nitrogen and an inert gas, or a mixed gas between inert gases.

In one of the embodiments, a gas recovery device is further included, the gas recovery device is in communication with the oxygen-free gas source, and is used for recovering the gas blown into the environment, and after being processed, it is delivered to the oxygen-free gas source.

In one of the embodiments, the heat dissipation module includes metal heat sinks; the metal heat sinks are aluminum heat sinks or copper heat sinks.

In one of the embodiments, the heat dissipation module further includes a water cooling unit.

In one of the embodiments, the substrate is a ceramic substrate or a metal substrate.

Since the above-mentioned ultraviolet LED light source device is provided with an oxygen-free gas source, when ultraviolet light is irradiated, the oxygen-free gas source blows the oxygen-free gas to the irradiation surface, which can dilute the oxygen concentration in the upper space of the irradiation surface, and continuous blowing can reduce Oxygen concentration is reduced to very low levels so that an oxygen-free environment can be created. When the ultraviolet rays are irradiated on the irradiation surface, ozone will not be generated in an oxygen-free environment, thereby ensuring the quality of ultraviolet irradiation and curing.

In addition, providing a light shield for the LED light source device, or designing a bent plate body of the heat dissipation module and placing the LED light source module on the heat dissipation module can achieve the purpose of concentrating light, thereby forming a better linear light spot.

Description of drawings

Fig. 1 is a schematic structural view of an ultraviolet LED light source device of an embodiment;

FIG. 2 is a schematic structural diagram of an LED light source module;

FIG. 3 is a schematic structural view of an ultraviolet LED light source device in another embodiment;

Fig. 4a is a schematic diagram of the board structure of the heat dissipation module;

Fig. 4b is a schematic cross-sectional view of the board body of the heat dissipation module;

Fig. 5 is a schematic diagram of the system structure of an ultraviolet LED light source device used in a printing process;

6a-6e are different structures of ultraviolet LED light source devices.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

FIG. 1 is a schematic structural view of an ultraviolet LED light source device according to an embodiment. The ultraviolet LED light source device 10 includes an LED light source module 100 , a heat dissipation module 200 and an oxygen-free gas source 300 arranged in an array. The oxygen-free gas source 300 is used to blow gas to the irradiating surface 90 of the LED light source module 100 to create an oxygen-free environment on the irradiating surface 90 of the LED light source module 100 .

The above-mentioned ultraviolet LED light source device 10 is provided with an oxygen-free gas source 300. When ultraviolet light is irradiated, the oxygen-free gas source 300 blows the oxygen-free gas to the irradiation surface 90, which can dilute the oxygen concentration in the upper space of the irradiation surface 90, Continuous blowing reduces the oxygen concentration to very low levels, creating an oxygen-free environment. Since the ultraviolet ray is irradiated on the irradiation surface 90, ozone will not be generated in an oxygen-free environment, thereby ensuring the quality of ultraviolet irradiated curing.

As shown in FIG. 2 , the LED light source module 100 may include a substrate 110 and LED light source units 120 disposed on the substrate 110 and arranged in an array. The substrate 110 is disposed on the heat dissipation module 200 . A driving circuit may be provided on the substrate 110 for driving the LED light source unit 120 to emit light. In this embodiment, the LED light source unit 120 is an ultraviolet light source. The LED light source unit 120 may include 1, 2 or more LED lamp beads. When the LED light source unit 120 is working, it will generate a lot of heat. By disposing the substrate 110 on the heat dissipation module 200 , heat can be conducted to the heat dissipation module 200 and dissipated through the heat dissipation module 200 to achieve the purpose of cooling down.

In one embodiment, the oxygen-free gas source 300 may be disposed inside the heat dissipation module 200 , and blow gas outward through an air outlet (not shown) disposed on the heat dissipation module 200 . Since the irradiated surface 90 of the LED light source module 100 is the area where an oxygen-free environment needs to be created, the integration of the anaerobic gas source 300 in the heat dissipation module 200 can just blow from the heat dissipation module 200 to the irradiated surface 90, saving space.

In addition, when the oxygen-free gas is in the heat dissipation module 200 , it can also absorb part of the heat and blow it to the irradiation surface 90 to help the heat dissipation module 200 to dissipate heat better.

In one embodiment, the oxygen-free gas may be nitrogen, an inert gas, a mixed gas of nitrogen and an inert gas, or a mixed gas between inert gases.

In one of the embodiments, the air outlet can be arranged between the LED light source units 120 . The LED light source units 120 are arranged in an array, and the air outlets may be scattered in multiple places among the LED light source units 120 . The air outlets can be evenly distributed or concentrated.

In other embodiments, the oxygen-free gas source 300 can also be set separately as shown in FIG. 1 . There may be multiple oxygen-free gas sources 300 surrounding the LED light source module 100 . It may also be that there is only one oxygen-free gas source 300 and multiple gas outlets are arranged around the LED light source module 100 .

The direction of the gas outlet of the oxygen-free gas source 300 can be adjusted to meet the requirement of blowing gas at a fixed point. The oxygen-free gas source 300 may also include a flow adjustment module, which is used to adjust the flow of the blowing gas, so as to adapt to different blowing volume requirements in different spaces.

In one embodiment, as shown in FIG. 3 , the ultraviolet LED light source device 10 further includes a light cover 400 covering all the LED light source modules 100 . If the oxygen-free gas source 300 is integrated in the heat dissipation module 200 , the gas outlet can only be provided outside the photomask 400 . The light cover 400 has a curved surface structure, which is used to collect light from the LED light source module 100 , avoid the loss of ultraviolet light energy, and enhance the irradiation effect of the ultraviolet light LED light source device 10 .

In one of the embodiments, the above-mentioned ultraviolet LED light source device 10 may further include a gas recovery device (not shown in the figure). The gas recovery device communicates with the oxygen-free gas source 300 , and is used to recover the gas blown into the environment, and deliver it to the oxygen-free gas source 300 after treatment.

In one embodiment, as shown in FIG. 4a, the cross-section of the heat dissipation module 200 is arched, the substrate 110 of the LED light source module 100 protrudes toward the inner concave surface of the heat dissipation module 200, and a plurality of LEDs are arranged on one side. The light source unit 120, the substrate 110 is provided with a plurality of LED light source units. Spot, as shown in Figure 4b. A plurality of LED light source units 120 are respectively placed on a plurality of continuously bent planes, so that the light emitted by the plurality of LED light source modules 100 is concentrated to form a linear light spot. The dimensions of the multiple bent planar structures can be the same or different, as long as the LED light source module 100 can be placed. The bending angles of the bent planar joints may also be the same or different, as long as the light emitted by the LED light source module 100 can be concentrated on the illuminating surface 90 .

It can be understood that the above-mentioned oxygen-free gas source 300 can also be placed in the heat dissipation module 200 with multi-plane continuous bent heat dissipation contact surfaces. And an air outlet is provided in the heat dissipation module 200 . Alternatively, the heat dissipation module 200 is arranged around the heat dissipation module 200 .

The above photomask 400 can also be added to the structure shown in FIG. 4a to further enhance the light concentration effect.

In one embodiment, the heat dissipation module 200 may include metal heat sinks. The metal heat sink can be an aluminum heat sink or a copper heat sink. The heat dissipation module 200 may include a part that is directly attached to the LED light source module 100, and may adopt a plate shape as shown in FIG. 1 or a bent plate body as shown in FIG. The side facing away from the LED light source module 100 . The fins for auxiliary heat dissipation can increase the surface area for heat dissipation and speed up the heat dissipation to the air. Further, the heat dissipation module 200 may further include a water cooling unit (not shown). The water cooling unit can be built into the heat dissipation module 200 , for example, a water flow pipe is laid on the surface or inside of the heat dissipation module 200 , and water flows through it to take away heat. So as to achieve better heat dissipation.

FIG. 5 shows the application of the ultraviolet LED light source device 10 in the printing process. As shown in FIG. 5 , the system for performing the printing process includes the ultraviolet LED light source device 10 , a tooth plate 30 and a conveying chain 40 for cooperatively conveying the paper 20 to be printed. After the paper 20 is painted with a picture, it is conveyed to the bottom of the ultraviolet light LED light source device 10 by the tooth plate 30 and the transmission chain 40, and the ultraviolet light LED light source device 10 emits ultraviolet rays 102 (invisible to the naked eye, which is an effect diagram) and irradiates on the paper 20. On the paint, the paint is cured, thereby curing the picture on the paper 20.

Fig. 6a is a specific structure corresponding to this usage mode. The heat dissipation module 200 is a concave block structure, and the main body is provided with a plurality of through holes for passing in cooling water. When the cooling water flows in the through hole, the heat generated by the ultraviolet LED light source module 100 can be taken away to improve the cooling effect. One side of the substrate 110 of the ultraviolet LED light source module 100 protrudes to the heat dissipation module 200 and is close to the heat dissipation module 200 . The other side of the substrate 110 of the ultraviolet LED light source module 100 is provided with LED light source units 120 , and the LED light source units 120 are arranged in an array. The cooling module 200 is further provided with a fastener 204 extending inward on one side of the concave surface, and the fixing shaft 500 is inserted between the fastener 204 and the gap on one side of the substrate 110 to firmly fix the ultraviolet LED light source module 100 .

The substrate 110 may be a ceramic substrate or a metal substrate, both of which have better heat dissipation effects. A thermal conductive glue and a graphene heat sink can also be arranged between the contact surface of the substrate 110 and the heat dissipation module 200 to achieve a better heat dissipation effect.

The oxygen-free gas source 300 is disposed on the side of the heat dissipation module 200 , and may include a fixed pipe 310 fixed on the main body of the heat dissipation module 200 and an air outlet pipe 320 disposed in the fixed pipe 310 . Wherein, an air outlet 322 may be provided on the air outlet pipe 320 . The oxygen-free gas is discharged through the gas outlet 322 on the gas outlet pipe 320 .

As shown in FIG. 6 b , the gas outlet pipe 320 can also be arranged in the base plate 110 , and the gas can be discharged through the gas outlet openings on the base plate 110 and the gas outlet pipe 320 .

As shown in FIG. 6c, the ultraviolet LED light source device 10 may further include a light cover 400 for collecting light.

As shown in FIG. 6d, the substrate 110 may be arc-shaped, and the LED light source unit 120 is placed on the arc-shaped surface.

As shown in FIG. 6e , on the basis of the structure shown in FIG. 6d , an air outlet pipe 320 may also be provided on the substrate 110 .

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. An ultraviolet LED light source device, comprising an LED light source module and a heat dissipation module, said LED light source module comprising a substrate and an LED light source unit arranged in an array on said substrate, said substrate being located on said heat dissipation module The module is characterized in that it also includes an oxygen-free gas source, and the oxygen-free gas source is used to blow oxygen-free gas to the irradiated surface of the LED light source module to create an oxygen-free environment on the irradiated surface of the LED light source module. 2 . The ultraviolet LED light source device according to claim 1 , wherein the oxygen-free gas source is arranged inside the heat dissipation module, and blows gas outward through an air outlet arranged on the heat dissipation module. 3 . 3 . The ultraviolet LED light source device according to claim 2 , wherein the air outlet is arranged between the LED light source modules. 4 . 4 . The ultraviolet LED light source device according to claim 2 , further comprising a light shield covering all the LED light source modules, and the air outlet is disposed outside the light shield. 5 . 5. The ultraviolet LED light source device according to claim 1, wherein the cross-section of the heat dissipation module is arched, one side of the substrate of the LED light source module protrudes to the inner concave surface of the heat dissipation module, and multiple A LED light source unit, the surface of the substrate with multiple LED light source units is multi-plane continuous bending, so that the cross-section is a multi-sided continuous bending arch, so that the light emitted by the multiple LED light source units is concentrated to form a linear light spot . 6. The ultraviolet LED light source device according to claim 1, wherein the gas is nitrogen, an inert gas, a mixed gas of nitrogen and an inert gas, or a mixed gas between inert gases. 7. The ultraviolet light LED light source device according to claim 1, characterized in that, it also includes a gas recovery device, the gas recovery device is communicated with an oxygen-free gas source for recycling the gas blown into the environment, and after treatment It is then delivered to the oxygen-free gas source. 8. The ultraviolet LED light source device according to claim 1, wherein the heat dissipation module comprises a metal heat sink; the metal heat sink is an aluminum heat sink or a copper heat sink. 9. The ultraviolet LED light source device according to claim 8, wherein the heat dissipation module further comprises a water cooling unit. 10. The ultraviolet LED light source device according to claim 1, wherein the substrate is a ceramic substrate or a metal substrate.