CN102121607B

CN102121607B - Design scheme of ultraviolet LED (light emitting diode) plane solidifying device

Info

Publication number: CN102121607B
Application number: CN201110020238A
Authority: CN
Inventors: 陈瑾; 武汉; 陈春; 周述勇; 朱骞; 朱向冰
Original assignee: Anhui Normal University
Current assignee: JIANGXI CHAOXIAN OPTOELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2011-01-11
Filing date: 2011-01-11
Publication date: 2012-10-24
Anticipated expiration: 2031-01-11
Also published as: CN102121607A

Abstract

A design scheme of an ultraviolet LED curing device. The invention divides the side of the curing surface along the feeding direction into several equal parts, and each part is less than or equal to 50 mm. The side is the length of the rectangle, and the curing surface is divided into several rectangles; each UV LED is equipped with a reflective surface and a reflective ring, and a UV LED and the corresponding reflective surface and reflective ring form an optical element, and every two optical elements serve as One group and several groups of optical elements are respectively arranged directly above the center of each rectangle along the direction of the feeding port. The traditional light source is replaced by ultraviolet LED, which has long life, low energy consumption, high power density, low temperature, low light decay, and environmental protection. The curing surface is designed in partitions along the direction of the feeding port and a free-form reflective surface is used to make light distribution easy. To achieve this, the reflective surface is used instead of the lens, the cost is low and the utilization rate of ultraviolet light is greatly increased.

Description

The design of a kind of ultraviolet LED plane solidification equipment

Technical field

The present invention relates to the design of ultra-violet curing device, the design of especially a kind of ultraviolet LED plane solidification equipment.

Background technology

Numerous industry medium ultraviolets are solidified light fixture and are more and more widely used; Like automobile industry, electron trade, printing industry, handicraft industry etc. because the LED ultraviolet source have the life-span long, start fast, energy consumption is little, temperature is low, light decay is little, environmental protection, the incomparable advantage of other light sources such as energy-conservation, progressively be applied in the solidification equipment by vast producer; Present stage, producer mainly used lens to change the LED optical power distribution; And be mainly used in a curing, but ultraviolet penetration capacity difference need select special material guaranteeing the good transmitance and the uniformity of lens for use, and process two curved surfaces of lens accurately; Can increase cost; Because lens material absorbs and reflection, cause ultraviolet utilization rate to descend in addition, the part ultraviolet light that LED sends can not be mapped to fully on the lens and also can be wasted; These shortcomings in very big aspect limit the development of ultra-violet curing light fixture, need to be resolved hurrily.

Summary of the invention

In order to solve above-mentioned technical barrier, the present invention proposes the design of a kind of ultraviolet LED plane solidification equipment.

The present invention solves the problems referred to above through following technical proposals:

Based on the Energy distribution on the curing face of radiation of light source characteristic that provides and required realization; To solidify face and be divided into some equal portions along feedstock direction; Every part is less than or equal to 50 millimeters; Wide as rectangle; Perpendicular to the limit of the curing face of the feedstock direction length as rectangle, curing face is divided into several wide rectangles that is less than or equal to 50 millimeters;

Every ultraviolet LED is equipped with a reflecting surface and a reflection circle; Ultraviolet LED is placed in the reflection circle; The part ultraviolet light that LED sends directly shines reflecting surface, and all the other ultraviolet lights that LED sends reflex to reflecting surface through the reflection circle, and ultraviolet light shines curing face through behind the reflecting surface;

Ultraviolet LED and respective reflective surfaces, reflection circle form an optical element; Place two optical elements directly over each rectangular centre; Per two optical elements are as one group, organize more optical element along the charging aperture direction respectively directly over each rectangular centre along arranged in a straight line.

Selected reflecting surface adopts free form surface, and the reflection circle is an annulus.

The design of this device adopts ultraviolet LED to substitute conventional light source; Life-span is long, it is fast to start, energy consumption is little, power density is high, temperature is low, light decay is little, environmental protection, no mercury pollution; With the reflecting surface of curing face along feedstock direction zoning design and employing free form surface; Make luminous intensity distribution be easy to realize, adopt the reflection circle can effectively overcome the big shortcoming of lighting angle of LED, adopt reflecting surface to substitute lens; Make low and utilization rate ultraviolet light of complete machine cost rise significantly, can ultraviolet LED be generalized in the curing apparatus of plane.

Description of drawings

Fig. 1 is a curing face subregion sketch map;

Fig. 2 is the light that sends of one group of ultraviolet LED light source arrives curing face through reflecting surface a light path sketch map;

Fig. 3 is the permutation and combination figure of many group ultraviolet LEDs and reflecting surface.

1. ultraviolet LEDs among the figure, 2. reflecting surface, 3. curing face, 4. reflection circle, 5. fin.

The specific embodiment

Tell about specific embodiments below in conjunction with accompanying drawing and instance.

The present invention adopts ultraviolet LED to substitute traditional light source, and will solidify face along charging aperture direction zoning design, and the curing uniformity is significantly improved, and substitutes lens with reflecting surface, saves cost, has overcome the absorption of lens to light, has improved efficient.

According to the Energy distribution on the curing face of radiation of light source characteristic that provides and required realization; The curing face of design curing machine is 200 millimeters in the length of side along the charging aperture direction, be 150 millimeters perpendicular to the length of side of charging aperture direction; As shown in Figure 1, arrow is represented the charging aperture direction among the figure, will be divided into 4 equal portions along the limit of the curing face of charging aperture direction; Every part the length of side is 50 millimeters, can with curing face be divided into 4 long be 150 millimeters, wide be 50 millimeters rectangle.

In Fig. 2; A ultraviolet LED and reflecting surface, a reflection circle constitute an optical element; The part light that ultraviolet LED sends shines directly into reflecting surface, and all the other ultraviolet lights reflex to reflecting surface through the reflection circle, and ultraviolet light shines on the curing face through behind the reflecting surface; Form one long be 150 millimeters, wide is 50 millimeters rectangle;

Two back-to-back being installed on the fin of ultraviolet LED are shone same rectangular area jointly.

The light that LED sends is finally fallen on the curing face, can obtain irradiation intensity, lists one group of differential equation; Find the solution differential equation group with computer programming, the substitution primary condition obtains one group of numerical solution of reflecting surface; Be the coordinate of each point on the reflecting surface, in modeling softwares such as these some importings Pro/E, fit to the model of free-form surface reflector; Drawn reflector model is imported again in the optics softwares such as TracePro; The material properties of reflector is set, and optical system is carried out ray tracing, further optimize reflecting surface according to the luminous intensity distribution result who simulates.

Correspondence is laid two optical elements directly over each rectangular centre; As shown in Figure 3; Two optical elements form one group of optical element; Many group optical elements get up to illuminate whole curing face along charging aperture direction permutation and combination directly over each rectangular centre, on curing face, form along the charging aperture direction to be 200 millimeters, to be 150 millimeters rectangular light spot perpendicular to the charging aperture direction that the illumination of each point all satisfies the evenly requirement of curing with radiation intensity on test curing face.

Through test, after using this ultraviolet LED and evenly solidifying design, start-up time, the body surface variations in temperature that is cured was less than 5 degrees centigrade less than 0.5 second, and the light decay of light is 1/3rd of a conventional lamp.

The foregoing description is illustrative principle of the present invention and effect only; And the embodiment of part, for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design; Can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims

1. ultraviolet LED plane solidification equipment; It is characterized in that: based on the Energy distribution on the curing face of radiation of light source characteristic that provides and required realization; To solidify face and be divided into some equal portions along feedstock direction; Every part is less than or equal to 50 millimeters; Wide as rectangle; Perpendicular to the limit of the curing face of the feedstock direction length as rectangle, curing face is divided into several wide rectangles that is less than or equal to 50 millimeters;

2. a kind of ultraviolet LED according to claim 1 plane solidification equipment, it is characterized in that: reflecting surface is a free form surface, the reflection circle is an annulus.