CN201507885U

CN201507885U - Heat radiation type street lamp casing

Info

Publication number: CN201507885U
Application number: CN2009202103666U
Authority: CN
Inventors: 张辉; 陆建辉; 俞伟民; 周俊; 俞伟荣
Original assignee: Shanghai Austar Lighting Electrical Industry Co Ltd
Current assignee: Shanghai Austar Lighting Electrical Industry Co Ltd
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2010-06-16
Anticipated expiration: 2019-09-29

Abstract

The utility model discloses a heat radiation type street lamp casing which comprises a bottom case for mounting a metal base circuit board and a casing matched with the bottom case; a plurality of air inlets are formed along a corner of the bottom case in sequence; a breather hole is formed on the casing; and a heat radiation channel is formed between the breather hole and the plurality of air inlets. The utility model can effectively improve the heat radiation effect of a street lamp.

Description

A kind of heat radiating type street lamp housing

Technical field:

The utility model relates to a kind of lighting apparatus, particularly a kind of housing of street lamp.

Background technology:

The LED lighting engineering has characteristics such as energy-saving and environmental protection, the life-span is long, volume is little as light source technology of new generation, can be widely used in fields such as various indications, demonstration, decoration, backlight, general lighting and urban landscape.

Led light source adopts and carries the combination of constant-current driven module formula, DC driven.Have super low-power consumption, compare energy-conservation more than 80% with conventional light source.

In the service life of LED, it is generally acknowledged has 100,000 hours under perfect condition.Reality in use, its light intensity can decay (being light decay) in time gradually, promptly led light source will reduce the efficient that electric energy is converted into luminous energy gradually.

In led light source was used, particularly in high-power, high-brightness LED light source applications, the light decay of led light source and its node operating temperature were contacted directly.When the node operating temperature is higher than 60 ℃, the working life of light source will significantly descend, experimental results show that: when surpassing 60 ℃, 5 ℃ of the every risings of LED operating temperature, the LED light decay increases by 10%, under the normal condition, the LED operating temperature should be controlled at below 60 ℃, could guarantee the service life more than 50,000 hours.Therefore, how to reduce node temperature and just become the key that guarantees the led light source reliably working life-span.But, in the practical application, for the angle of appreciation attractive in appearance, it is too big that light fixture often can not be done, therefore led light source and drive circuit chip thereof often are arranged in the limited scope in space, are the operating temperature that reduces node by the mode of natural heat dissipation fully, thereby poor effect.

Operating temperature for better control, reduction LED node, people use the stronger metal-base circuit plate of heat dispersion (as aluminium base circuit board) to improve the radiating effect of LED node, but, because circuit board often needs to be sealed in lamp casing inside, aluminium base circuit board utilizes the limited air in the light fixture to carry out heat loss through conduction and is difficult to reach people's expected effect.

At present, the LED street lamp adopts conventional streetlamp housing to convert basically both at home and abroad.Its shortcoming is: the restriction of streetlamp housing volume shape, and the volume that is used for the LED radiator can not be very big, so heat conductivility is low, the heat that led light source produces can not directly be derived by lamp housing fast; The light source heat is concentrated, and the LED operating temperature is too high, and LED power can not be made too big.Limited application and the popularization of high-power and high-luminance LED light source on city illuminations such as street lamp and view.

The utility model content:

The utility model,, improves the street lamp purpose in service life to reach, and a kind of novel street lamp housing that can carry out high efficiency and heat radiation is provided in order to improve the radiating effect of street lamp in existing defective aspect the heat radiation at existing street lamp.

In order to achieve the above object, the utility model adopts following technical scheme:

A kind of heat radiating type street lamp housing, described housing comprises drain pan that the metal-base circuit plate is installed and the shell that matches with drain pan, offer a plurality of air admission holes successively along the drain pan corner, offer an air-vent on the described shell, form thermal dissipating path between described air-vent and a plurality of air admission hole.

The outer surface of described drain pan is provided with a plurality of radiating ribs, and is to emitting shape distribution all around; Air admission hole on the described drain pan is distributed between the adjacent radiating ribs.

Distance between the size of described air admission hole and the adjacent radiating ribs adapts.

Dismountable gas cap that is mounted with on the air-vent on the described shell.

According to technique scheme to the utlity model has following advantage:

(1) on the drain pan of housing and shell, offers air admission hole and air-vent respectively, thereby form a thermal dissipating path in enclosure interior, the heat that makes street lamp produce can in time be discharged, improved the radiating effect of street lamp greatly, thereby make be largely increased the service life of street lamp, promoted application and the popularization of high-power and high-luminance LED light source on city illuminations such as street lamp and view.

(2) outer surface of drain pan is provided with radiating ribs, can further improve radiating effect like this.

(3) be mounted with gas cap on the air-vent of shell, can play certain waterproof effect, also have the effect of decoration simultaneously, make the housing overall appearance grace of street lamp.

Description of drawings:

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a drain pan external structure schematic diagram.

Fig. 3 is a drain pan internal structure schematic diagram.

Fig. 4 is the partial enlarged drawing of A part among Fig. 3.

Fig. 5 is the gas cap structural representation.

The specific embodiment:

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

In order effectively to improve the radiating effect of street lamp, abandoned conventional meanses such as replacing heat sink material, increase product area of dissipation, and a kind of housing of high efficiency and heat radiation is provided.

Referring to Fig. 1, the housing that the utility model provides mainly comprises and is used to install the drain pan 100 of metal-base circuit plate and the shell 200 that matches with drain pan.

Referring to Fig. 2, the outer surface of drain pan 100 is provided with some radiating ribs in the utility model.Radiating ribs 101 on drain pan top 102 be to around emitting shape distribute, and be horizontal distribution in the radiating ribs 107 of drain pan bottom 103.

Offer air admission hole 104 successively along drain pan 100 corners between the radiating ribs 101 on drain pan 100 tops 102, make all to offer an air admission hole 104 between the adjacent radiating ribs 101, the size of this air admission hole 104 is consistent with spacing between the adjacent radiating ribs 101.

The two ends in the gap between the radiating ribs 107 of horizontal distribution on the drain pan bottom 103 offer air admission hole 106 successively along drain pan 100 corners, and make and all to offer an air admission hole 106 between every adjacent radiating ribs 107 that the size of this air admission hole 106 is consistent with spacing between the adjacent radiating ribs 107.

The utility model also offers air admission hole 105 in the bottom of drain pan bottom 103 along it along the corner simultaneously.

As shown in Figure 3 and Figure 4, each air admission hole of the drain pan bottom, inside 103 of drain pan 100 is provided with an inwardly protruded arch baffle plate 108, can play certain barrier effect for rainwater, avoids directly the washing away inner electrical equipment of rainwater.

In order to form heat-radiation loop in housing, the utility model improves equally at the shell 200 to housing.As shown in Figure 1, shell 200 also is equipped with a gas cap that is mated 202 on this air-vent 201 simultaneously offering an air-vent 201 with the middle opposite position in drain pan 100 tops.As shown in Figure 5, this gas cap 202 matches by fixture block on it 203 and spacing ring 204, realizes dismountable assigning in the air-vent 201; The brim of a hat 205 on the gas cap 202 can play effective barrier effect to rainwater, and exhaust outlet 206 can effectively be discharged the hot gas in the housing simultaneously.A gas cap 202 like this assigns on the shell, tightly can not play the effect of rainproof exhaust, simultaneously whole housing is played certain decoration function.

The utility model that obtains according to technique scheme when using, the middle part that is placed in drain pan top of metal-base circuit plate sealing, other electrical equipment then can be placed in the bottom of drain pan, these electric elements all adopt the water-tight design; At last cover the street lamp that drain pan promptly forms high efficiency and heat radiation with shell again.This street lamp will produce a large amount of heats in the inside of housing when work, particularly the highest in metal-base circuit plate portion temperature, housing middle part air is heated and will rises, and the air-vent from shell is discharged outside the housing then; The rising because housing mid portion air is heated will form negative pressure in the bottom of housing mid portion; Under the effect of negative pressure, outside cold air will enter into by the air admission hole of offering on the drain pan and carry out thermal convection current in the housing, absorbs heat, thereby plays the effect of heat radiation; The air that is heated this moment rises and discharges from air-vent, and forms negative pressure once more in the bottom, forms a circulative convection loop like this, makes that the heat in the lamp body is dispersed in the outer air of lamp endlessly.

When the rainy day, the gas cap on the shell can prevent effectively that rainwater from entering in the housing, even there is rainwater to enter from the exhaust outlet of gas cap, and also minute quantity just, the electricity consumption device in can housing does not impact.The baffle plate that is provided with on the air admission hole of drain pan bottom can effectively prevent directly entering of rainwater, and simultaneously these air admission holes can also in time be discharged the rainwater that enters in the housing outside the housing except can air inlet, and the electricity consumption device in the housing is played a protective role.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. heat radiating type street lamp housing, described housing comprises drain pan that the metal-base circuit plate is installed and the shell that matches with drain pan, it is characterized in that, offer a plurality of air admission holes successively along the drain pan corner, offer an air-vent on the described shell, form thermal dissipating path between described air-vent and a plurality of air admission hole.

2. a kind of heat radiating type street lamp housing according to claim 1 is characterized in that the outer surface of described drain pan is provided with a plurality of radiating ribs, and is to emitting shape distribution all around; Air admission hole on the described drain pan is distributed between the adjacent radiating ribs.

3. a kind of heat radiating type street lamp housing according to claim 2 is characterized in that the distance between the size of described air admission hole and the adjacent radiating ribs adapts.

4. a kind of heat radiating type street lamp housing according to claim 1 is characterized in that, dismountable gas cap that is mounted with on the air-vent on the described shell.