LED high pole lamp

Abstract

The present invention discloses an LED high pole lamp, comprising an LED single lamp, a main support rod and a lamp panel lifting frame, wherein the lamp panel lifting frame is arranged on the main support rod, and the LED single lamp is arranged on the lamp panel lifting frame; the beneficial effects of the present invention are: the lamp panel has a stable structure, a reasonable and compact structure, and has a strong wind resistance; the heat dissipation speed is fast, the temperature of the LED module is effectively reduced, the heat dissipation problem of high-power LED lamps is solved, the light decay speed of the LED is reduced, and the service life of the LED lamp is extended.

Description

Technical Field

[0001] The invention belongs to the technical field of LED lighting, and in particular relates to an LED high pole lamp. Background Art

[0002] LED (Light Emitting Diode) is a solid-state light source with excellent energy-saving and environmental protection advantages. With the same light efficiency, the energy consumption is only 10%-20% of that of incandescent lamps. It is known as the "new lighting source of the 21st century" and has become a research and development hotspot in recent years. Compared with traditional light sources, semiconductor light sources have the advantages of energy saving, high efficiency, small size, long life, fast response speed, low driving voltage, and vibration resistance.

[0003] The luminous mechanism of LED is to generate light by electrons jumping between energy bands. Its spectrum does not contain infrared part, so its heat cannot be dissipated by radiation, so LED is a "cold" light source. However, the current luminous efficiency of LED can only reach 10%-20%, and 80%-90% of the energy is converted into heat. If no heat dissipation measures are taken, the core temperature of high-power LED will rise rapidly. When its junction temperature rises above the maximum allowable temperature (generally 150℃), the high-power LED will be damaged due to overheating. Therefore, in the design of high-power LED lamps, the most important design work is heat dissipation design. The chip size of high-power white light LEDs currently manufactured is mostly above 1mm×1mm, and the power dissipation of a single device is above 1W. If the package size is simply enlarged proportionally, the heat of the chip cannot be dissipated, which will accelerate the aging of the chip and phosphor, and may also cause the solder of the flip-chip to melt, making the chip invalid.

[0004] In addition, in the heat dissipation calculation of general power devices (such as power IC), as long as the junction temperature is less than the maximum allowable junction temperature (generally 125℃), it is fine. However, in the heat dissipation design of high-power LEDs, the junction temperature requirement is much lower than 125℃. The reason is that the junction temperature has a great influence on the light output rate and life of the LED. The higher the junction temperature, the lower the light output rate of the LED and the shorter the life.

[0005] Therefore, the packaging and heat dissipation of LEDs in practical applications have become bottlenecks affecting their development. If the heat dissipation and packaging problems in the actual application of LEDs can be solved, LEDs can be promoted and applied in traffic lighting, decorative lighting, and indoor lighting, which will greatly alleviate the power shortage problem and reduce CO2 emissions.

[0006] High pole lamps generally refer to new lighting devices composed of steel conical lamp poles over 15 meters and high-power modular lamp frames. They are widely used in ports, airports, large sports stadiums, urban squares and other occasions. Due to the high installation position of high pole lamps, they are generally required to have good typhoon resistance when used at the seaside and in open areas. At the same time, high pole lamps have high power, great difficulty in heat dissipation, and large heat dissipation capacity, which naturally requires a larger radiator. However, a radiator that is too large and too heavy installed at the lamp head position increases the risk of damage by strong winds. Summary of the invention

[0007] The purpose of the present invention is to provide an LED high pole lamp to meet the above-mentioned requirements for wind resistance when used at the seaside or in open areas.

[0008] In order to solve the above problems, the present invention is implemented according to the following technical solutions:

[0009] An LED high pole lamp comprises an LED single lamp, a main support rod and a lamp panel lifting frame, wherein the lamp panel lifting frame is arranged on the main support rod, and the LED single lamp is arranged on the lamp panel lifting frame.

[0010] More preferably, the LED single lamp includes an LED lamp head, a first radiator, a first fluid pipe, a steam outflow pipe, and a liquid return pipe; the top of the LED lamp head is connected to the steam outflow pipe, and the side of the LED lamp head is connected to the liquid return pipe; the first radiator is connected to the first fluid pipe, the end of the first fluid pipe is connected to the LED lamp head through the liquid return pipe, and the LED lamp head is connected to the side of the first fluid pipe close to the first radiator through the steam outflow pipe; the first fluid pipe, the steam outflow pipe, and the liquid return pipe form a sealed loop and are filled with liquid working fluid.

[0011] More preferably, the liquid return pipe is located below the LED lamp holder.

[0012] More preferably, the liquid return pipe is flush with the LED lamp holder.

[0013] More preferably, the LED single lamp also includes a second radiator, a second fluid tube and a fluid pipeline; the second fluid tube is connected to the second radiator, the side of the second fluid tube close to the second radiator is connected to the side of the first fluid tube close to the first radiator through the fluid pipeline, and the end of the second fluid tube is connected to the end of the first fluid tube through the fluid pipeline.

[0014] More preferably, the LED lamp holder includes an LED light-emitting module, a lens, a micro-groove and a lamp holder cavity; the LED light-emitting module is arranged at the bottom of the lamp holder cavity, the lens is arranged at the bottom of the lamp holder cavity and wraps the LED light-emitting module, and the micro-groove is located in the lamp holder cavity and is arranged on the bottom wall.

[0015] More preferably, the micro-channel is composed of a plurality of concave-convex strips.

[0016] More preferably, the convex strip is made of metal material.

[0017] The advantages of the present invention are:

[0018] (1) The micro-grooves have high thermal conductivity and can quickly transfer the heat generated by the LED module when it is working to the micro-grooves. The liquid in the lamp holder cavity will absorb the heat from the micro-grooves. This is based on the principle of natural circulation fluid phase change heat transfer. The heat transfer speed is fast, which effectively reduces the temperature of the LED module, solves the heat dissipation problem of high-power LED lamps, reduces the light decay rate of LEDs, and extends the service life of LED lamps.

[0019] (2) The large and powerful radiator is divided into multiple radiators and moved to a position close to the main support pole. Multiple smaller radiators are randomly dispersed and arranged. The LED lamp head is light in weight, making the lamp panel structure of the entire high pole lamp more stable, reasonable and compact, and has strong wind resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional view of a single LED lamp of Embodiment 1 of an LED high pole lamp of the present invention;

[0021] Figure 2 It is a cross-sectional view of an LED lamp holder of a first embodiment of an LED high pole lamp of the present invention;

[0022] Figure 3 This is a structural diagram of the lamp panel of the LED high pole lamp of the present invention;

[0023] Figure 4 This is an overall diagram of the LED high pole lamp of the present invention.

[0024] in:

[0025] 1-LED lamp holder, 1a-LED light-emitting module, 1b-lens, 1c-micro-groove, 1d-lamp holder cavity, 2-fluid pipeline, 3-first radiator, 4-second radiator, 5-liquid filling port, 6-liquid working medium, 7-liquid level line, 8-main support rod, 9-lamp panel lifting frame, 10-lightning rod, 11-first fluid pipe, 12-second fluid pipe, 13-steam outflow pipe, 14-liquid reflux pipe. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] An LED high pole lamp comprises an LED single lamp, a main support pole 8 and a lamp panel lifting frame 9, wherein the lamp panel lifting frame 9 is arranged on the main support pole 8, and the LED single lamp is arranged on the lamp panel lifting frame 9. The high pole lamp comprises at least six LED single lamps. A lightning rod 10 is also arranged on the top of the main support pole 8, which is mainly used to protect electrical equipment from high transient overvoltage hazards and limit the follow-on time.

[0028] The LED single lamp includes an LED lamp holder 1, a first radiator 3, a first fluid pipe 11, a steam outflow pipe 13, and a liquid return pipe 14; the top of the LED lamp holder 1 is connected to the steam outflow pipe 13, and the side of the LED lamp holder 1 is connected to the liquid return pipe 14; the first radiator 3 is connected to the first fluid pipe 11, and the end of the first fluid pipe 11 is connected to the LED lamp holder 1 through the liquid return pipe 14, and the LED lamp holder 1 is connected to the side of the first fluid pipe 11 close to the first radiator 3 through the steam outflow pipe 13; the first fluid pipe 11, the steam outflow pipe 13, and the liquid return pipe 14 constitute a sealed loop and are filled with liquid working medium 6. The inside of the sealed loop is evacuated and then filled with liquid working medium 6, but it cannot be filled with liquid working medium 6. The liquid working medium 6 can be various refrigerants such as water, methanol, ethanol, acetone, etc. The advantage of this structure is that it constitutes a sealed closed loop, the internal liquid working medium 6 can absorb heat and evaporate, and the heat transfer is carried out by adopting the natural circulation fluid phase change heat transfer principle, which has a large heat transfer coefficient and good heat transfer effect. In addition to forming a sealed loop, the first fluid pipe 11 also has a supporting function for supporting the first radiator 3 .

[0029] The LED single lamp also includes a second radiator 4, a second fluid pipe 12 and a fluid pipeline 2; the second radiator 4 is connected to the second fluid pipe 12, the side of the second fluid pipe 12 close to the second radiator 4 is connected to the side of the first fluid pipe 11 close to the first radiator 3 through the fluid pipeline 2, and the end of the second fluid pipe 12 is connected to the end of the first fluid pipe 11 through the fluid pipeline 2. The large and powerful radiator is divided into multiple radiators, and multiple smaller radiators are randomly dispersed and arranged, so that the LED lamp head is light in weight and has a reasonable and compact structure.

[0030] The LED single lamp comprises at least two radiators, the high-power radiator is divided into several radiators, and the several radiators are arranged near the main support rod 8. The lamp panel structure is more stable, the structure is reasonable and compact, and has strong wind resistance.

[0031] The LED lamp holder 1 includes an LED light-emitting module 1a, a lens 1b, a micro-groove 1c and a lamp holder cavity 1d; the LED light-emitting module 1a is arranged at the bottom of the lamp holder cavity 1d and is in close contact with it through a thermal conductive paste or glue, the lens 1b is arranged at the bottom of the lamp holder cavity 1d and wraps the LED light-emitting module 1a, and the micro-groove 1c is located inside the lamp holder cavity 1d and is arranged on the bottom wall. The end of the first fluid tube 11 is a liquid filling port 5, and a liquid level line 7 is formed on the horizontal plane where the LED lamp holder 1 is located. The liquid working medium 6 is in a gas-liquid two-phase state in the loop, and the liquid level is preferably just enough to immerse the micro-groove 1c. Below the liquid level line is the liquid working medium 6. The heat emitted by the LED light-emitting module 1a is transferred to the micro-groove 1c through heat conduction. The micro-groove 1c has a large thermal conductivity coefficient and can transfer the heat as quickly as possible.

[0032] The micro-grooves 1c are composed of a plurality of concave and convex strips; the advantage of this structure is that the concave and convex strips have a larger contact area than the smooth surface, which is conducive to the liquid working medium 6 absorbing heat and boiling to form steam. The convex strips are made of a metal material with a high thermal conductivity. The advantage of this structure is that the heat dissipation of the LED light-emitting module 1a is quickly transferred to the fluid working medium in the lamp holder cavity 1d by using a metal material with a high thermal conductivity, so as to achieve the purpose of rapid heat dissipation.

[0033] The positional relationship between the liquid reflux pipe 14 and the LED lamp holder 1 has the following two embodiments.

[0034] Embodiment 1

[0035] The liquid return pipe 14 is located below the LED lamp holder 1 .

[0036] Embodiment 2

[0037] The liquid return pipe 14 is flush with the LED lamp holder 1 .

[0038] In the above two implementations, the advantages of the structure are that a sealed loop is formed to facilitate heat transfer, and the heat dissipation effect is good and the heat can be dissipated quickly.

[0039] The heat dissipation process of the present invention is as follows: the LED light-emitting module 1a transfers heat to the micro-grooves 1c. The structure of the micro-grooves 1c has a larger heat exchange area than the smooth surface, which is conducive to the liquid working medium absorbing heat and boiling to form steam. The steam naturally rises to the first radiator 3 due to the density difference, and is condensed into liquid in the first fluid pipe 11 and the inner wall of the first radiator 3. The heat is dissipated into the air through the first fluid pipe 11 and the outer surface of the first radiator 3 through convection heat exchange with the air. The condensed liquid working medium 6 flows into the first fluid pipe 11 located at the bottom due to gravity. As the condensed liquid working medium 6 increases, it flows back to the LED lamp head 1 through the liquid return pipe 14. The LED lamp head 1 is the evaporation chamber, and the first radiator 3 is the condensation chamber. In this way, a flow cycle of the liquid working medium 6 and a heat transfer process are formed. This cycle does not require an electric pump to drive it, and its flow power comes from the heat emitted by the LED lamp.

[0040] The advantages of the present invention are:

[0041] (1) The micro-grooves have high thermal conductivity and can quickly transfer the heat generated by the LED module when it is working to the micro-grooves. The liquid in the lamp holder cavity will absorb the heat from the micro-grooves. This is based on the principle of natural circulation fluid phase change heat transfer. The heat transfer speed is fast, which effectively reduces the temperature of the LED module, solves the heat dissipation problem of high-power LED lamps, reduces the light decay rate of LEDs, and extends the service life of LED lamps.

[0042] (2) The large and powerful radiator is divided into multiple radiators and moved to a position close to the main support pole. Multiple smaller radiators are randomly dispersed and arranged. The LED lamp head is light in weight, making the lamp panel structure of the entire high pole lamp more stable, reasonable and compact, and has strong wind resistance.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An LED high pole lamp, characterized in that: It comprises a single LED lamp, a main support rod and a lamp panel lifting frame, wherein the lamp panel lifting frame is arranged on the main support rod, and the single LED lamp is arranged on the lamp panel lifting frame; The LED single lamp comprises an LED lamp holder, a first radiator, a first fluid pipe, a steam outflow pipe, and a liquid return pipe; The top of the LED lamp holder is connected to the steam outflow pipe, and the side of the LED lamp holder is connected to the liquid return pipe; The first radiator is connected to the first fluid pipe, the end of the first fluid pipe is connected to the LED lamp holder through a liquid return pipe, and the LED lamp holder is connected to a side of the first fluid pipe close to the first radiator through a steam outflow pipe; The first fluid pipe, the steam outflow pipe, and the liquid return pipe form a sealed loop and are filled with liquid working medium; The liquid reflux pipe is located below the LED lamp holder; Or the liquid return pipe is flush with the LED lamp holder; The LED single lamp also includes a second radiator, a second fluid pipe and a fluid pipeline; The second radiator is connected to the second fluid pipe, a side of the second fluid pipe close to the second radiator is connected to a side of the first fluid pipe close to the first radiator through the fluid pipeline, and a terminal end of the second fluid pipe is connected to a terminal end of the first fluid pipe through the fluid pipeline; The LED lamp holder comprises an LED light-emitting module, a lens, a micro-groove and a lamp holder cavity; The LED light-emitting module is arranged at the bottom of the lamp holder cavity, the lens is arranged at the bottom of the lamp holder cavity and wraps the LED light-emitting module, and the micro-groove is located in the lamp holder cavity and is arranged on the bottom wall.

2. The LED high pole lamp according to claim 1, characterized in that: The micro-grooves are composed of a plurality of concave-convex strips.

3. The LED high pole lamp according to claim 2, characterized in that: The convex strip is made of metal material.

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