CN201983014U

CN201983014U - Combined type LED lamp

Info

Publication number: CN201983014U
Application number: CN2010206943872U
Authority: CN
Inventors: 陈方; 沈晖; 梁玉栋
Original assignee: Zhejiang Shenghui Lighting Co Ltd
Current assignee: Zhejiang Shenghui Lighting Co Ltd
Priority date: 2010-12-31
Filing date: 2010-12-31
Publication date: 2011-09-21
Anticipated expiration: 2020-12-31

Abstract

The utility model discloses a combined type LED lamp, which comprises a lamp holder, a radiator, a driving power supply and an LED light source. The internal of the radiator is equipped with a cavity and the external surface thereof is uniformly distributed with a plurality of longitudinally arranged radiating fins. The LED light source is fixed on a plane at the front part of the radiator. A plastic housing equipped with a plurality of heat radiation holes is sleeved outside the radiator. According to the LED lamp, a plastic housing is installed at the outside of the radiator, so that users are effectively protected from being scratched by the edge of the radiating fins and being burnt by the surface of the radiating fins during the operation of the LED lamp. Meanwhile, a plurality of air channels are built via the heat radiation holes, so that air is forced to flow upward from the lower part of the lamp cup to the heat radiation channel and flow out of the heat radiation holes. Therefore, the efficient natural convection heat radiation is realized. Compared with the conventional natural convection heat radiation wherein the lamp cup is exposed to the outside, the heat radiation effect is improved.

Description

A kind of combination type LED lamp

Technical field

The utility model relates to the LED light fixture of PAR lamp series such as PAR20, PAR30, PAR38, particularly a kind of combination type LED lamp.

Background technology

The structure of general PAR lamp series LED lamp as shown in Figure 1, it comprises rubber base 21, in rubber base 21, accommodate LED driving power 22, outside rubber base 21, be arranged with thermal louver cup 23, the outer surface of heat radiation Lamp cup vertically is provided with a plurality of radiating fins 24, the front end of heat radiation Lamp cup 23 is provided with heat-conducting plate 25, be fixed with the PCB circuit board 26 and the lens 27 of led light source, the characteristics of this fitting structure are that heat radiation Lamp cup 23 is exposed to the outside, be shell be again radiator, it typically is aluminium and process, there is the hidden danger that scratches, scalds staff in the radiating fin 24 of heat radiation Lamp cup 23.

Summary of the invention

The utility model provides a kind of combination type LED lamp of avoiding scalding, scratching staff at the technical problem that above-mentioned prior art exists.

The technical solution of the utility model is achieved in that

A kind of combination type LED lamp, comprise lamp holder, radiating element, driving power and led light source, radiating element inside is provided with cavity, on the outer surface of radiating element, be evenly distributed with the radiating fin of a plurality of vertical settings, led light source is fixed on the plane of radiating element front end, is arranged with a plastic casing outside radiating element, is provided with a plurality of louvres on plastic casing.

As preferably, form heat dissipation channel between any two adjacent radiating fins, described louvre is connected with heat dissipation channel.Plastic casing covers the radiating fin heat dissipation channel and dispels the heat by louvre, has guaranteed radiating effect.

As preferably, described louvre is arranged on the sidewall of plastic casing.

As preferably, described louvre is in-line, and longitudinally is provided with.The Another important function of plastic casing is to have set up several air channels, force air up to enter into heat dissipation channel from the Lamp cup lower end, flow out by louvre again, thereby formed efficient heat loss through convection, the exposed Natural Heat Convection mode of Lamp cup as compared with the past, radiating effect is improved.

As preferably, the quantity of louvre is identical with the quantity of heat dissipation channel.

As preferably, in plastic casing, hit exactly and be provided with open-ended hollow cylinder, driving power is contained in the hollow cylinder, and the opening part encapsulating encapsulation of hollow cylinder is also exposed lead-in wire, and described hollow cylinder is inserted in the cavity of radiating element.Driving power is contained in the hollow cylinder of plastic casing, and open-ended place seals with glue, has guaranteed electrical safety.

As preferably, described hollow cylinder and plastic casing are formed in one.

As preferably, be provided with an end cap at the front end of plastic casing.End cap has two effects, and the one, can cover the front end of plastic casing, both can avoid staff directly directly to contact with the radiating fin front end, increased aesthetic measure again; The 2nd, lens can be installed on end cap according to actual needs.

As preferably, described end cap is an annulus body, circumferentially evenly is provided with a plurality of air-vents on the annulus body, and described air-vent is communicated with heat dissipation channel.Air flows through heat dissipation channel via air-vent, and the heat that radiating fin gives out is taken away.

As preferably, each air-vent is connected with 1 independent heat dissipation channel or 2～3 adjacent heat dissipation channels.

As preferably, radiating element adopts screw to link to each other with plastic casing.

As preferably, be extended with a back-up ring downwards along the inner ring edge of end cap, on back-up ring, be provided with the screw mounting hole site, back-up ring links to each other by the plane of screw with the radiating element front end.

As preferably, on end cap, be provided with lens.To increase the range of exposures of LED.

The radiating fin of the LED light fixture of general PAR series is tightr, and the gap between the adjacent in twos radiating fin is very little, and the spacing of its root is usually about 2mm, so NATURAL CONVECTION COEFFICIENT OF HEAT is lower, and product thermal diffusivity price ratio is not high.As preferably, the spacing of adjacent in twos radiating fin root is 4～8mm.Thus, increased the gap between the radiating fin as compared with the past, not only formed a passage that heat radiation is good, also reduced radiating fin, thereby reduced whole weight, provided cost savings.

Adopted the principle of the present utility model and the beneficial effect of technique scheme to be:

1. the application of environmental-protection fireproof heatproof novel plastic shell: not only effectively protect the user not scratched by the edge of radiating fin, did not scald on the surface of radiating fin when the protection user was not worked by light fixture; But also several air channels have been set up by louvre, force air up to enter into heat dissipation channel, flow out by louvre again, thereby formed Natural Heat Convection efficiently from the Lamp cup lower end, the exposed Natural Heat Convection mode of Lamp cup as compared with the past, radiating effect is improved.

2. strengthened the spacing between the radiating fin, not only formed the expansion flow structure of good Natural Heat Convection, expanding flow phenomenon is that hot-air takes place to expand suddenly in cold outlet, generation is to a pressure differential of air in the heat dissipation channel, make the interior flow velocity of heat dissipation channel promote, help heat radiation, guarantee the service life of LED; But also increase spacing between the big radiating fin, thus reduced the quantity of radiating fin, thus product weight effectively reduced, reduce cost.

Description of drawings

Fig. 1 is the explosive view of PAR lamp series LED light fixture general in the prior art;

Fig. 2 is the explosive view one of the utility model combination type LED lamp;

Fig. 3 is the installation diagram of the utility model combination type LED lamp;

Fig. 4 is the stereogram of the utility model combination type LED lamp;

Fig. 5 is the explosive view two of the utility model combination type LED lamp.

The specific embodiment

The specific embodiment of the present utility model is as follows:

Embodiment: a kind of combination type LED lamp, shown in Fig. 2～5, comprise lamp holder 1, plastic casing 6, the rear end of plastic casing 6 is connected with lamp holder 1, its connected mode can adopt mode such as be threaded, center, rear end in plastic casing 6 is provided with open-ended hollow cylinder 9, described hollow cylinder 9 is formed in one with plastic casing 6, is equipped with driving power 3 in hollow cylinder 9, and the opening part encapsulating encapsulation of hollow cylinder 9 is also exposed lead-in wire, in plastic casing 6, be arranged with radiating element 2, the shape approximate match of plastic casing 6 and radiating element 2, radiating element 2 inside are provided with cavity 41, and this cavity 41 just can ccontaining hollow cylinder 9; The rear end of radiating element 2 adopts screw a31 to link to each other with plastic casing 6.

On the outer surface of radiating element 2, be evenly distributed with the radiating fin 5 of a plurality of vertical settings, on the plane of radiating element 2 front ends, be fixed with led light source 4, described led light source 4 comprises PCB circuit board 15, on PCB circuit board 15, be fixed with some led chips 16, lead-in wire on the driving power 3 passes connection PCB circuit board 15 behind the plane of radiating element 2 front ends, and PCB circuit board 15 scribbles high-heat-conductivity glue with the interplanar of radiating element 2 front ends.

Form heat dissipation channel 8 between any two adjacent radiating fins 5, on the sidewall of plastic casing 6, evenly be provided with a plurality of louvres 7, the quantity of louvre 7 is identical with the quantity of heat dissipation channel 8, described louvre 7 is communicated with over against heat dissipation channel 8 settings and with heat dissipation channel 8, described louvre 7 is in-line, be provided with along the plastic casing length direction, make plastic casing 6 cover radiating fin 5 and expose heat dissipation channel 8 fully to be beneficial to heat radiation.

Front end at plastic casing 6 is provided with an end cap 10, described end cap 10 is an annulus body, circumferentially evenly be provided with a plurality of air-vents 11 on the annulus body, described air-vent 11 is communicated with heat dissipation channel 8, and each air-vent 11 is connected with two adjacent heat dissipation channels 8.

Inner ring edge along end cap 10 is extended with a back-up ring 12 downwards, is provided with screw mounting hole site 13 on back-up ring 12, and screw b32 passes screw mounting hole site 13 and PCB circuit board 15 is fixed on back-up ring 12 and PCB circuit board 15 on the plane of radiating element 2 front ends.

In order to improve the radiation response of LED light fixture, on the inner ring of end cap 10, be provided with lens 14, the material of lens 14 is the PMMA optical plastic, it links to each other with end cap 10 by buckle structure, need not put glue.

Through check, combination type LED lamp of the present utility model all has good behaviour comparing with common light fixture aspect weight and the cost control, is example with the PAR20 serial lamps and lanterns:

By above table as seen, when reducing weight, improved radiating effect, and cost descends.

The utility model is according to the demand of heat dissipation capacity, and the requirement of temperature controlling range, adjust best fin depth-width ratio, wall thickness at radiating element is on the basis of 2mm, with best thermal diffusivity price ratio, drawing thickness is 1mm, highly is 10mm, the root spacing is the radiating fin of 5mm, according to classics heat radiation Study on Theory achievement, in the free convection, spacing/fin thickness value is greater than 6, consider the changing factor of gravity direction, and add the expansion flow phenomenon that plastic casing produces, and factor such as overall appearance size, optimum dissolves the thickness and the spacing of fin, and fin height, we know and are not high more good more, and we use software to be optimized design when carrying out rational depth-width ratio design, and the consideration practical factor, adjusting numerical value is 10mm.

Moreover, then carry out concrete experimental comparison, select optimization heat radiation aluminium cup parameter.As seen select rational radiation parameter, help reducing cost, reduce weight, obtain good cost performance.And the good radiating effect of pursuit.

Following form has been enumerated the contrast of the LED lamp of LED junction temperature rise that parameters such as the fin thickness, spacing, height of the radiating element of some the utility model LED light fixtures draw and general PAR lamp series.

By above table as can be seen, the fin root spacing of conventional P AR series LED lamps is on the basis of 2mm, the LED junction temperature rise is about 42.5 ℃, and the utility model has strengthened fin root spacing, junction temperature rise is about 41 ℃, not only reduce number of fins, reduced processing cost, also improved radiating effect.

Claims

1. combination type LED lamp, comprise lamp holder (1), radiating element (2), driving power (3) and led light source (4), radiating element (2) inside is provided with cavity, on the outer surface of radiating element (2), be evenly distributed with the radiating fin (5) of a plurality of vertical settings, led light source (4) is fixed on the plane of radiating element (2) front end, it is characterized in that: be arranged with a plastic casing (6) outside radiating element (2), be provided with a plurality of louvres (7) on plastic casing (6).

2. a kind of combination type LED lamp according to claim 1 is characterized in that: form heat dissipation channel (8) between any two adjacent radiating fins (5), described louvre (7) is connected with heat dissipation channel (8).

3. a kind of combination type LED lamp according to claim 1 and 2 is characterized in that: described louvre (7) is arranged on the sidewall of plastic casing (6).

4. a kind of combination type LED lamp according to claim 3 is characterized in that: described louvre (7) is in-line, and along the length direction setting of plastic casing (6).

5. a kind of combination type LED lamp according to claim 4 is characterized in that: the quantity of louvre (7) is identical with the quantity of heat dissipation channel (8).

6. a kind of combination type LED lamp according to claim 1, it is characterized in that: the center is provided with open-ended hollow cylinder (9) in plastic casing (6), driving power (3) is contained in the hollow cylinder (9), the opening part encapsulating encapsulation of hollow cylinder (9) is also exposed lead-in wire, and described hollow cylinder (9) is inserted in the cavity of radiating element (2).

7. a kind of combination type LED lamp according to claim 6 is characterized in that: described hollow cylinder (9) is formed in one with plastic casing (6).

8. a kind of combination type LED lamp according to claim 1 is characterized in that: the front end at plastic casing (6) is provided with an end cap (10).

9. a kind of combination type LED lamp according to claim 8 is characterized in that: described end cap (10) is an annulus body, circumferentially evenly is provided with a plurality of air-vents (11) on the annulus body, and described air-vent (11) is communicated with heat dissipation channel (8).

10. a kind of combination type LED lamp according to claim 9 is characterized in that: each air-vent (11) is connected with 1 independent heat dissipation channel (8) or 2～3 adjacent heat dissipation channels (8).

11. a kind of combination type LED lamp according to claim 1 is characterized in that: radiating element (2) adopts screw to link to each other with plastic casing (6).

12. a kind of combination type LED lamp according to claim 9, it is characterized in that: the inner ring edge along end cap (10) is extended with a back-up ring (12) downwards, be provided with screw mounting hole site (13) on back-up ring (12), back-up ring (12) links to each other by the plane of screw with radiating element (2) front end.

13. a kind of combination type LED lamp according to claim 8 is characterized in that: on end cap (10), be provided with lens (14).

14. a kind of combination type LED lamp according to claim 1 is characterized in that: the spacing of adjacent in twos radiating fin (5) root is 4～8mm.