CN203478021U

CN203478021U - LED streetlamp

Info

Publication number: CN203478021U
Application number: CN201320577442.3U
Authority: CN
Inventors: 董艳霞
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Chatani Electronics Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Chatani Electronics Co Ltd
Priority date: 2013-09-17
Filing date: 2013-09-17
Publication date: 2014-03-12
Anticipated expiration: 2023-09-17

Abstract

The utility model discloses an LED streetlamp which comprises a lamp rod, a shell, a lamp strip attached to the inner side face of the lower end of the shell, and a circuit board driving the lamp strip. The upper end of the shell is connected with one end of the lamp rod, the lamp strip is provided with a plurality of LED chips, the wall of the shell is a hollowed vacuum cavity, and cooling liquid is contained in a part of space of the vacuum cavity. The heat generated when the LED lamp is used will transmitted to the lower end of the shell, the temperature at the lower end of the shell is higher than the temperature at the upper end of the shell, when heated, the cooling liquid inside the vacuum cavity will absorb the heat and evaporate into gas, and the evaporated gaseous cooling liquid will ascend in the vacuum cavity; when ascending to the upper end of the shell, the gaseous cooling liquid will be cooled and be condensed into the liquid state cooling liquid, the liquid state cooling liquid will flow back to the lower end of the shell under the action of the gravity, the process is circulated, and the heat generated by the LED chips is continuously led out. Thus, the LED streetlamp is simple in structure and has the good heat dissipation effect.

Description

A kind of LED street lamp

Technical field

The utility model relates to lighting technical field, particularly a kind of LED street lamp.

Background technology

LED street lamp adopts high-power LED chip mostly, can reach by the quantity of less LED chip the illuminating effect of higher brightness like this.

Along with the increase of the power of LED chip, LED street lamp in the course of the work, can produce a lot of heats, if these heats are not dispersed into the external world in time, to cause LED chip temperature to raise, and at high temperature work, LED chip easily lost efficacy, cause LED street lamp to decline service life, in prior art, the general radiating fin that adopts dispels the heat, still, and this heat dissipating method, radiating effect is poor, and complex structure.

Utility model content

The utility model provides a kind of LED street lamp, simple in structure, and has good radiating effect.

For achieving the above object, the utility model provides following technical scheme:

The utility model provides a kind of LED street lamp, comprise: lamp stand, shell, the lamp bar of lower end medial surface that is attached at described shell and the circuit board that drives described lamp bar, the upper end of described shell is connected with one end of described lamp stand, described lamp bar has a plurality of LED chips, the wall of described shell is the vacuum chamber of inner hollow, and in the segment space of described vacuum chamber, cooling fluid is housed.

The LED lamp that the utility model provides, in use, LED chip on lamp bar can produce heat, because lamp bar is the lower end that is attached to shell, so the heat that LED chip produces can pass to the lower end of shell, the lower end temperature of shell can be higher than upper end temperature, cooling fluid heat in vacuum chamber can absorb heat and flash to gas that (gas is now in saturation state, the temperature of the gas under saturation state depends on the pressure of vacuum chamber inside, pressure is little, saturated gas temperature is low, that is to say, cooling fluid in vacuum chamber is easily evaporated to gas, can strengthen radiating effect), flash to the cooling fluid of gaseous state because density is less, in vacuum chamber, can rise, when the cooling fluid of gaseous state rises to the upper end of shell, because the temperature of shell upper end is lower, the cooling fluid of gaseous state is met and coldly can again be condensed into liquid state, liquid cooling fluid will be back to the lower end of shell under the effect of gravity, so circulation is gone down, the heat that LED chip produces will constantly be exported.

So, the LED street lamp that the utility model provides, simple in structure, and there is good radiating effect.

In some optional embodiments, described cooling fluid is alcohol.

In some optional embodiments, described cooling fluid is ether.

In some optional embodiments, the inner surface of described shell is provided with reflecting layer.Reflecting layer the utilization rate that can improve light is set.

In some optional embodiments, above-mentioned LED street lamp also comprises the lampshade that is installed on described shell lower end.The spot light that lamp bar can be sent that arranges of lampshade becomes area source, strengthens visual effect.

In some optional embodiments, the upper end of described shell is connected by rubber seal with one end of described lamp stand.

In some optional embodiments, described circuit board is connected by heat-conducting glue with described shell.

Accompanying drawing explanation

The LED lamp post structure schematic diagram that Fig. 1 provides for the utility model embodiment.

In figure:

1. lamp stand 2. shell 21. vacuum chamber 3. lampshades

The specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.

The LED lamp post structure schematic diagram that Fig. 1 provides for the utility model, as shown in Figure 1, the LED street lamp that the utility model is carried, comprise: lamp stand 1, shell 2, the lamp bar of lower end medial surface that is attached at shell 2 and the circuit board of driving lamp bar, the upper end of shell 2 is connected with one end of lamp stand 1, lamp bar has a plurality of LED chips, the vacuum chamber 21 that the wall of shell 2 is inner hollow, and in the segment space of vacuum chamber 21, cooling fluid is housed.

Explanation herein, cooling fluid is housed in the segment space of vacuum chamber 21 to be referred to and in vacuum chamber 21, not to be full of cooling fluid, after can flashing to gas to cooling fluid like this, provide space, so that cooling fluid can flash to gaseous state, can condense into liquid state again, concrete vacuum chamber 21 interior cooling fluids number, those skilled in the art can set according to actual conditions.

The LED lamp that the utility model provides, shell 2 has certain wall thickness, and (being vacuum chamber 21) that the pars intramuralis of shell 2 is hollow, in use, LED chip on lamp bar can produce heat, because lamp bar is the lower end that is attached to shell 2, so the heat that LED chip produces can pass to the lower end of shell 2, the lower end temperature of shell 2 can be higher than upper end temperature, cooling fluid heat in vacuum chamber 21 can absorb heat and flash to gas that (gas is now in saturation state, the temperature of the gas under saturation state depends on the pressure of vacuum chamber inside, pressure is little, saturated gas temperature is low, that is to say, cooling fluid in vacuum chamber is easily evaporated to gas, can strengthen radiating effect), flash to the cooling fluid of gaseous state because density is less, in the interior meeting of vacuum chamber 21, rise, when the cooling fluid of gaseous state rises to the upper end of shell 2, because the temperature of shell 2 upper ends is lower, the cooling fluid of gaseous state is met and coldly can again be condensed into liquid state, liquid cooling fluid will be back to the lower end (direction of arrow as shown in Figure 1) of shell 2 under the effect of gravity, so circulation is gone down, the heat that LED chip produces will constantly be exported.

Select low-boiling cooling fluid, can accelerate the evaporation rate of cooling fluid, and then accelerate shedding of heat, in the utility model preferred embodiment, cooling fluid is alcohol or for ether, cooling fluid also can be selected other low-boiling liquid certainly, just repeats no longer one by one here.

A kind of preferred embodiment in, the inner surface of shell 2 is provided with reflecting layer.Reflecting layer the utilization rate that can improve light is set.The material in reflecting layer can be: aluminum, glass material etc.

Continuation is with reference to figure 1, and above-mentioned LED street lamp also comprises the lampshade 3 that is installed on shell 2 lower ends.The spot light that lamp bar can be sent that arranges of lampshade 3 becomes area source, strengthens visual effect.

Preferably, the upper end of shell 2 is connected by rubber seal with one end of lamp stand 1.Certainly.The upper end of shell 2 also can be connected by other sealing structure with one end of lamp stand 1, in the time of in the utility model preferred embodiment, by rubber blanket, realizes sealing, can prevent that the extraneous impurity such as dust from entering in shell, pollutes lamp bar.

The utility model preferred embodiment in, circuit board is connected by heat-conducting glue with shell 2.The heat that heat-conducting glue can better produce circuit board is passed to shell 2, and heat-conducting glue self has cold-and-heat resistent alternation performance, ageing-resistant performance and electrical insulation capability.

Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model embodiment.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.

Claims

1. a LED street lamp, comprise: lamp stand, shell, the lamp bar of lower end medial surface that is attached at described shell and the circuit board that drives described lamp bar, the upper end of described shell is connected with one end of described lamp stand, described lamp bar has a plurality of LED chips, it is characterized in that, the wall of described shell is the vacuum chamber of inner hollow, and in the segment space of described vacuum chamber, cooling fluid is housed.

2. LED street lamp according to claim 1, is characterized in that, described cooling fluid is alcohol.

3. LED street lamp according to claim 1, is characterized in that, described cooling fluid is ether.

4. LED street lamp according to claim 1, is characterized in that, the inner surface of described shell is provided with reflecting layer.

5. LED street lamp according to claim 1, is characterized in that, also comprises the lampshade that is installed on described shell lower end.

6. LED street lamp according to claim 1, is characterized in that, the upper end of described shell is connected by rubber seal with one end of described lamp stand.

7. according to the LED street lamp described in claim 1～6 any one, it is characterized in that, described circuit board is connected by heat-conducting glue with described shell.