Patent Application
20140247608
The present invention relates to an LED photo-electric source assembly. Also, the present invention relates to a road lamp, further to an LED road lamp improved from traditional road lamp.
At present, the road lamp is a familiar lamp. The traditional road lamp is usually made by halogen lamp like sodium lamp which it is high power consumption, short service life and with low light efficiency. As shown in
Also for a district using a traditional road lamp, it is necessary to disassemble entirely if a currently used LED road lamp is to be replaced. One can not use an original traditional road lamps' holder any more but needs to use a new LED road lamp holder. So this will cause repeated investment and waste. And if the improved LED road lamp was broken, it is necessary to use a new LED road lamp holder to replace and then disassemble and take back to check. It will be very trouble to maintain with low efficiency and high cost.
Also, the applicant has used an above mentioned method to develop a high power LED road lamp, but the radiating air can not directly outflow to outside. Even if the air is circularly and convective, it also needs to heat change through outer casing and outer air, this will cause high temperature on outer casing as well as inner casing, and heat can not dissipate.
When an LED is applied for daily lighting and achieve lighting requirement, it is necessary to centralize multi-power LED to one lamp, so LED's heat dissipation is a most important element to affect LED lamp use condition and service life, especially for a high power LED lamp. Heat dissipation has become a technological difficulty for wide application of the device.
A traditional LED lamp is equipped with passive heat dissipation, which uses radiators or similar device for cooling. So when one needs to improve heat dissipation effect, it is necessary to increase heat dissipation area as much as possible, but this will cause the size of a current LED lamp to become bigger and make the structure complicated. Also, the heat dissipation effect is unsatisfied. The applicant combined a radiating fan to a radiator and developed an LED lamp with initiative heat dissipation and passive heat dissipation, achieving an excellent result as it can improve stabilization and service life. But for improving heat dissipation effect on a high power road lamp, it results in an open structure with poor waterproof and dustproof. So it will be restricted by outside and especial condition. And also it is necessary to design much complicated ventilation structure for increasing heat dissipation channel.
Currently, thermally conductive silicone and thermally conductive empire cloth are used to heat conduct and insulate between a light source board and radiator. The heat conductivity coefficient for thermally conductive silicone is 3 W/(m·K)-4 W/(m·K), the heat conductivity coefficient for thermally conductive empire cloth is 2 W(m·K)-3 W/(m·K). Both are unsatisfactory due to low heat conductivity coefficients. Also, thermally conductive silicone is made of an unstable paste so it is difficult to spread evenly between the light source board and radiator. So this will cause poor thermal conductivity and reduce insulating property thereby causing a short circuit. Thermally conductive empire cloth is easy to transform, also troublesomely stall and is less efficient.
The present invention intends to overcome deficiencies of the prior art and provide an LED photo-electric source assembly, which is simple in structure and effective in heat dissipation.
Further, the present invention also provides an LED road lamp with low cost, same shape as traditional road lamps, easy disassembly which is an improvement from a traditional road lamp. This kind of road lamp can be improve and maintain on field.
The technical solutions adopted in the present invention is:
An LED road lamp improved from traditional road lamp, comprises an LED photo-electric source assembly, an installing board, and a housing assembly of a traditional road lamp for containing light source, wherein a light outlet arranged on the installing board adapts in size and shape to an opening arranged at the bottom of the housing assembly; the LED photo-electric source assembly is fixedly connected to the installing board and emits light through the light outlet and the installing board is fixedly connected with the housing assembly through a clamping fixture; the LED photo-electric source assembly comprises a radiator, a radiating fan, a driving circuit board subassembly, an LED light source component, an upper cover of a power supply box, a lower cover of the power supply box, and a waterproof bolt component, wherein the LED light source component comprises several LED chips and LED submount; the radiator comprises a bottom plate whose underside is flat, on the top face of which a radiating part being flaky or cylindrical is provided; the LED submount is fixedly connected to the bottom plate transmitting heat; in the central area of the upper part of radiating part, a space area is provided for containing the radiating fan i.e. dust-proof and water-proof fan; in the air intake and air outlet of the radiating fan two fan guards are provided; on the top of the radiating fan the lower cover is fixedly connected to radiator; the upper cover and the lower cover are sealed joint and the driving circuit board subassembly is inside; the waterproof bolt component connects the port which a power wire going through the upper cover.
Further, several installing holes is on the installing board around the light outlet; an install bolts is fixedly connected to the installing board by going through the installing holes by a nut, afterwards the installing hole of the LED photo-electric source assembly is sleeved to the install bolt, and another nut or a snap joint is fixedly connected to install bolts, the LED photo-electric source assembly components is fixedly connected to the installing board.
Further, several ventilation slots or ventilation holes in the installing board are provided.
Further, a install hole for fan is in the installing board, and an outer radiating fan is on the install hole.
Further, the clamping fixture comprises a roll forming plate and several fastening screws; several install column with thread is arranged around the opening at the bottom of the housing assembly, on which the edge of the installing board overlapping joint; a waterproof jacket is arranged around the edge of installing board, and the bottom of the roll forming plate is holding down the installing board, and the top of the roll forming plate is fixedly connected to the install column by the fastening screw, the installing board is fixedly connected to the housing assembly.
Further, a thermal insulation synthetic mica sheet is between the LED submount and the bottom plate, the edge of which is beyond 1-10 mm to the edge of the LED submount; the LED submount and the bottom plate are fixed through several first bolts, an insulating colloidal particle fixed to the first bolts is electrical isolation between the LED submount with the bottom plate and first bolts; the LED photo-electric source assembly further comprising an annular insulator board, which is in the sealed space by the upper cover and the lower cover, inside of which the driving circuit board subassembly is provided.
Further, several third bolts are fixedly connected to radiator orderly going through the upward fan guard of the radiating fan, the radiating fan and the downward fan guard of which; the upper cover and the lower cover are fixedly connected by the fourth bolts and several nuts; at least two shores protruding out of the radiator part on the back of the radiator are provided, and the shores supporting the lower cover are higher 10-50 mm than the top surface of the radiating fan; several double-screw bolts with internal thread on head and external thread on tail are fixedly connected to the shores going through the lower cover; several fifth bolts are fixedly connected with the internal thread of the double-screw bolts going through the driving circuit board subassembly; the height of the head of the double-screw bolts which the internal thread inside is 5-10 mm; the outline of the radiator is circular, and the upper cover and the lower cover are also circular.
Further, it comprises a lens, a decorate circle; wherein the lens and the decorate circle are fixedly connected to the bottom of the radiator; a silicone waterproof gasket is in the connector of the lens with the bottom of the radiator, that is fixedly connected to the second bolts; several installing holes surrounding the decorate circle are provided.
Further, the LED photo-electric source assembly components further comprising a wind scooper with a flared shape; the wind scooper is fixedly connected to the radiator by several connecting bolts across the top edge of the wind scooper, which surround the side of the radiating part; an annular air outlet between the bottom of the wind scooper and the bottom of the radiator is provided; the outside air flow into the radiating fan from the space between the lower cover with the radiator, and flow outside through the annular air outlet through the channel inside of the radiating part; the bottom of the wind scooper arranged outer edge, which holds down the installing board and is fixedly connected by bolts, adapts in size to the gap on installing board; the air inside the housing assembly flows outside through the annular air outlet by the radiator fan.
Further, it comprises a lens, which is fixedly connected to bottom of the radiator by the second bolts and the silicone waterproof gasket; Several installing holes are in an area around the wind scooper.
The present invention has advantageous effects as below. According to the LED photo-electric source assembly that comprises a radiator, a radiating fan, a driving circuit board subassembly, an LED light source component, an upper cover of a power supply box, a lower cover of the power supply box, and a waterproof bolt component, wherein the LED light source component comprises several LED chips and LED submount; the radiator comprises a bottom plate whose underside is flat, on the top face of which a radiating part being flaky or cylindrical is provided; the LED submount is fixedly connected to the bottom plate transmitting heat; in the central area of the upper part of radiating part, a space area is provided for containing the radiating fan i.e. dust-proof and water-proof fan; in the air intake and air outlet of the radiating fan two fan guards are provided; on the top of the radiating fan the lower cover is fixedly connected to radiator; the upper cover and the lower cover are sealed joint and the driving circuit board subassembly is inside; the waterproof bolt component connects the port which a power wire going through the upper cover. The power wire can be sealed by the waterproof bolt component then achieve to waterproof and dustproof; also, the radiating fan part is waterproof and dustproof; so based on above this whole lamp has function of waterproof and dustproof, and it is very suitable for road lamp especially; also this LED lamp has initiative heat dissipation and passive heat dissipation after combined radiating fan to radiator, so it will be improve stabilization and service life. In a word, this invention of the LED photo-electric source assembly is simple structure, good heat dissipation, good waterproof and dust proof.
Further, this invention of the LED photo-electric source assembly which comprises a wind scooper with a flared shape; the wind scooper is fixedly connected to the radiator by several connecting bolts across the top edge of the wind scooper, which surrounding the side of the radiating part; an annular air outlet between bottom of the wind scooper with bottom of the radiator is provided; the outside air flow into the radiating fan from the space between the lower cover with the radiator, and flow outside through the annular air outlet after through the channel inside of the radiating part. The air on radiating fan can be deflect by wind scooper and make it fully flow by top in and bottom out, this will be avoid blind area and turbulence, also avoid the abuse by cooling air can not disperse with high temperature on internal recycling. So it takes the cooling air flow to outside quickly and reduce lamp's working temperature. Also annular air outlet between the bottom of wind scooper and radiator can enhance more decoration, so this invention of the LED photo-electric source assembly has easy structure, low cost, good effect on heat dissipation, also optimize the channel for cooling air flow. Take this LED photo-electric source assembly apply to LED road lamp, it will be make inner and outer air on outer casing circularly, this will be avoid high temperature by inner circular on outer casing, so it no needs to install extra outer exhaust fan, and will not affect lamp's appearance, also improve product's stabilization, further, the annular air outlet between the bottom of wind scooper and radiator enhanced more decoration, so this invention of LED road lamp has easy structure, good heat dissipation, low inner working temperature, and no more extra cost.
This invention of the LED photo-electric source assembly wherein a thermal insulation synthetic mica is sheet between the LED submount and the bottom plate, the edge of which is beyond 1-10 mm to the edge of the LED submount; the synthetic mica sheet was made by Mica mineral raw materials and then plus mucilage glue to press by high temperature, it has advantageous of excellent thermal conductivity, fire resistance and electrical insulating property, homogeneous thick, adjustable area/size, flexibility and processability. The heat conductivity coefficient for the synthetic mica sheet is 5 W/(m·K)-24 W/(m·K), it is higher than current used which thermally conductive silicone is 3 W/(m·K)-4 W/(m·K), and conductive empire cloth is 2 W(m·K)-3 W/(m·K), both heat conductivity coefficient are low and bad heat dissipation effect. Also, thermally conductive silicone is a unstable paste so it is difficult to spread evenly between light source board and radiator, so this will cause badly thermal conductivity and reduce insulating property, further will cause short circuit; thermally conductive empire cloth is easy to transform, also troublesomely stall and low efficient. But mica sheet is a stable state with higher uniformity, so it will be make the touch of LED submount and bottom plate closely and uniformly, and better heat dissipation, insulating property, also easily install, high efficient; due to the edge of mica sheet is beyond 1-10 mm to the edge of LED submount, it can be meet the request of creepage's distance between LED submount and radiator to improve safety. So this invention of the LED photo-electric source assembly has easy structure, higher production efficiency, good hermal insulation.
This invention of the LED road lamp improved from traditional road lamp comprises an LED photo-electric source assembly, an installing board, and a housing assembly of a traditional road lamp for containing light source, wherein a light outlet arranged on the installing board adapts in size and shape to an opening arranged at the bottom of the housing assembly; the LED photo-electric source assembly is fixedly connected to the installing board and emits light through the light outlet and the installing board is fixedly connected with the housing assembly through a clamping fixture. This invention is using traditional road lamp's outer casing as LED road lamp's, and remove traditional reflector, sodium light source, sodium power source, glass protection diffuser, then took the LED photo-electric source assembly and installing board fix in the outer casing by traditional road lamp's holding fixed device, it fully remain traditional's appearance so it is same. Also through this easily install method, not only easily disassembly and installation on locale, but also can use the LED photo electric source directly replace to broken one, this will be avoid a trouble to take wholly lamp holder back to factory to check, and high efficiency on improvement and maintain. Also it will be reduce much whole cost and avoid repeat invest and waste, so for this road lamp which it improved from traditional road lamp with low cost, also same appearance as traditional one, easily remove and high efficiency on installation.
As shown in
The LED photo-electric source assembly 600 comprises a radiator 1, a radiating fan 2, a driving circuit board subassembly 3, an LED light source component 4, an annular insulator board 30, an upper cover 31 of a power supply box, a lower cover 32 of the power supply box, a lens 5, a decorate circle 6, a thermal insulation synthetic mica sheet 8, and a waterproof bolt component 34, wherein the LED light source component 4 comprises several LED chips and LED submount; the outline of the radiator 1 is circular, the radiator 1 comprises a bottom plate 11 whose underside is flat, on the top face of which a radiating part 12 being flaky in the outer ring and cylindrical inside for increasing heat dissipation channel and improving the cooling performance; in the central area of the upper part of radiating part 12, a space area is provided for containing the radiating fan 2 i.e. dust-proof and water-proof fan, so the radiating fan is dustproof and waterproof; in the air intake and air outlet of the radiating fan 2 two fan guards 21 are provided to prevent foreign matter enter into the fan and offer more security protection; the detailed connecting method as: four third bolts 93 are fixedly connected to radiator 1 orderly going through the upward fan guard 21 of the radiating fang, the radiating fan 2 and the downward fan guard 21 of which; on the top of the radiating fan 2 the lower cover 32 is fixedly connected to radiator 1; the upper cover 31 and the lower cover 32 are sealed joint and the driving circuit board subassembly 3 is inside; the detailed connecting method as: the upper cover 31 and the lower cover 32 are fixedly connected by four fourth bolts 94 and four nuts 97; the annular insulator board 30 is in the sealed space by the upper cover 31 and the lower cover 32 to improve insulation and isolation between power source to the upper cover 31 and the lower cover 32, inside of which the driving circuit board subassembly 3 is provided; the waterproof bolt component 34 connects the port which a power wire going through the upper cover 31; the power wire (unremarked in the drawings) can be sealed by the waterproof bolt components 34, as it can be make power source waterproof and dustproof; four shores 13 protruding out of the radiator part on the back of the radiator 1 are provided, and the shores 13 supporting the lower cover 32 are higher 10-50 mm than the top surface of the radiating fan 2; so this will be retain a space to strengthen ventilation for fan's intake and outlet, the detailed connecting method as: four double-screw bolts 96 with internal thread on head and external thread on tail are fixedly connected to the shores 13 going through the lower cover 32; four fifth bolts 95 are fixedly connected with the internal thread of the double-screw bolts 96 going through the driving circuit board subassembly 3; the hole on the driving circuit board subassembly 3 which the fifth bolts 95 going through is taken to isolate the insulation; the height of the head of the double-screw bolts 96 which the internal thread inside is 5-10 mm; so it can be meet the request of creepage's distance and insulation between driving circuit board subassembly 3 and lower cover 32; the LED submount is fixedly connected to the bottom plate 11 transmitting heat; the detailed connecting method as: the LED submount and the bottom plate 11 are fixed through four first bolts 91, an insulating colloidal particle 7 fixed to the first bolts 91 is electrical isolation between the LED submount with the bottom plate 11 and first bolts 91; so this will strengthen insulation and further enhance creepage's distance to meet requirement of safety; the thermal insulation synthetic mica sheet 8 is between the LED submount and the bottom plate 11, the edge of which is beyond 1-10 mm to the edge of the LED submount; the lens 5 and the decorate circle 6 are fixedly connected to the bottom of the radiator 1, the detailed connecting method as: a silicone waterproof gasket 9 is in the connector of the lens 5 with the bottom of the radiator 1 to further enhance waterproof property for light source part, which is fixedly connected to the second bolts 92; several installing holes 601 surrounding the decorate circle 6 are provided; the upper cover 31 and the lower cover 32 are also circular which is same as the outline of radiator 1, so it is good for reducing overall volume.
The power wire can be sealed by the waterproof bolt component 34 then achieve to waterproof and dustproof; also, the radiating fan 2 is waterproof and dustproof; also the decorate circle 6 and the lens 5 are fixed joint with the bottom of the radiator 1 to make light source part is waterproof and dustproof; so based on above this whole LED photo-electric source assembly 600 has function of waterproof and dustproof, and it is very suitable for the road lamp especially; also this LED lamp has initiative heat dissipation and passive heat dissipation after combined the radiating fan 2 to the radiator 1, so it will be improved stabilization and service life; a thermal insulation synthetic mica sheet 8 is between the LED submount and the bottom plate 11, the synthetic mica sheet 8 was made by Mica mineral raw materials and then plus mucilage glue to press by high temperature, it has advantageous of excellent thermal conductivity, fire resistance and electrical insulating property, homogeneous thick, adjustable area/size, flexibility and processability; the heat conductivity coefficient for the synthetic mica sheet is 5 W/(m·K)-24 W/(m·K), it is higher than thermally conductive silicone and conductive empire cloth; also the mica sheet is a stable state with higher uniformity, so it will be make the touch of LED submount and bottom plate closely and uniformly, and better heat dissipation, insulating property, also easily install, high efficient; due to the edge of mica sheet is beyond 1-10 mm to the edge of LED submount, it can be meet the request of creepage's distance between LED submount and radiator to improve safety; so this invention of the LED photo-electric source assembly is simple structure, higher production efficiency, good heat dissipation and hermal insulation, good waterproof and dustproof; when the LED photo-electric source assembly 600 is working, the radiating fan 2 is working at the same time, the thermic from LED chip brightens through LED submount and the mica sheet 8 to conduct to the radiator 1, the radiator 1 is same passive heat dissipation as current radiator, let one part of thermic flow to air, also, under the effect of the radiating fan 2, the outside air was forcible to flow through the radiator 1, take away thermic on radiator 1 to avoid LED chip working under high temperature to extend service life; due to it is a forcible heat dissipation, so it can be reduce the weight and volume of radiator than normal lamp and enhance the adaptation.
As shown in
And also, this embodiment of installing board of LED photo-electric source assembly is different from embodiment I as: in this embodiment, our installing holes 702 is on the installing board 700 around the light outlet 701; an install bolts 98 is fixedly connected to the installing board 700 by going through the installing holes 702 by a nut 99, afterwards the installing hole 602 in the around of the wind scooper 10 is sleeved to the install bolt 98, and a snap joint 970 is fixedly connected to install bolts 98, the LED photo-electric source assembly components 600 is fixedly connected to the installing board 700; wherein the snap joint 970 comprises a notched subject 971, a slider 972, a reset spring 973, the subject 971 and the slider 972 each arranged an axle hole 975, 974 for member bar pass through; the diameter of the install bolts 98 is smaller than the diameter of the axle holes 975, 974; relying on elastin of the reset spring 973, the holes 975, 974 is to close the screw part of the install bolts 98 by relative each other, and fixes joint with the install bolts 98 by side force; the speed for this snap connecting method is so fast.
The air inside of the housing assembly 100 of LED road lamp will be flow outside from the annular air outlet 61 through the radiator 2; so it will be make inner and outer air on outer casing circularly, and avoid high temperature by inner circular on outer casing, so it no needs to install extra outer exhaust fan, not affecting the lamp's appearance, but improving the product's stabilization; further, the annular air outlet 61 between the bottom of wind scooper 10 and radiator 1 enhances more decoration; so this invention of LED road lamp has easy structure, good heat dissipation, low inner working temperature, and no more extra cost.
The air through into the radiating fan 2 will be deflect by the wind scooper 10 and make it fully flow by top in and bottom out, the flow path as shown in
Other characters in this embodiment are the same as Embodiment I.
As shown in
Other characters in this embodiment are the same as Embodiment I.
As shown in
Other characters in this embodiment are the same as Embodiment I.
This invention can be widely applied to the field of LED illumination.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201110303619.6 | Oct 2011 | CN | national |
| 201110416430.8 | Dec 2011 | CN | national |
This application is a U.S. National Phase Application under 35 U.S.C. §371 of International Patent Application No. PCT/CN2012/079863 filed on Aug. 9, 2012, and claims the benefit of Chinese Patent Application No. 201110303619.6 filed on Oct. 2, 2011 and No. 201110416430.8 filed on Dec. 13, 2011, all of which are incorporated by reference in their entirely herein. The International Application was published on Apr. 11, 2013 as International Publication No. WO/2013/049982 under PCT Article 21(2).
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/CN2012/079863 | 8/9/2012 | WO | 00 | 4/7/2014 |
