The LED fluorescent lamp
Technical field
The present invention relates to the fluorescent lamp lighting field, more particularly, relate to a kind of LED fluorescent lamp.
Background technology
LED has been widely used in the normal lighting field, as has been applied on the fluorescent lamp as a kind of illuminating source of efficient energy-saving.For guarantee brightness of illumination, just need to use a plurality of LED can reach brightness requirement side by side on the common fluorescent lamp.For the fluorescent lamp of pins type LED, a plurality of LED are plugged into usually and realize on the pcb board that circuit connects, and power supply then directly is equipped with at the pcb board back side.Therefore, the heat that LED produces when illumination is delivered on the PCB by pin and dispels the heat, and also can pass through heat loss through radiation simultaneously.And LED is on the pin insertion pcb board, only a bit contacts with pcb board, and hot energy delivered is very little.Therefore, for the pins type LED fluorescent lamp, the main mode of heat radiation need depend on radiation, and the radiating efficiency of radiation is very low.In the existing LED fluorescent lamp, its radiation mainly is exactly the hot-air of fluorescent tube inside and the energy exchange of lampshade and ambient air outside, and radiation efficiency is not high.If the LED weak heat-dissipating can make the LED decay accelerate, the colour temperature that is produced also can be drifted about, and the life-span of lamp can shorten thereupon.
Summary of the invention
The technical problem to be solved in the present invention is, and is low and can not rely on the defective of heat loss through conduction at the above-mentioned pins type LED fluorescent lamp radiation efficiency of prior art, provides a kind of by promoting internal convection to strengthen the LED fluorescent lamp of heat radiation.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of LED fluorescent lamp, comprise lamp plate, be contained in the LED in described lamp plate front, be connected lampshade that covers on described LED periphery on the lamp plate front and the power supply that is contained in the lamp plate back side, also comprise cover on the described lamp plate back side with described power supply in being enclosed in heat dissipating housing and be buckled on the described heat dissipating housing and and be separated with the dissipating cover in gap between it, have louvre on the described heat dissipating housing, have the dislocation hole of staggering with louvre on the described dissipating cover, the hot-air in described lampshade and the heat dissipating housing is overflowed from the dislocation hole by the gap of louvre between heat dissipating housing and dissipating cover.
In LED fluorescent lamp of the present invention, described louvre and dislocation hole respectively have a plurality of, and all form a line equally spacedly or multiple row along the length direction of described LED fluorescent lamp, and louvre and the hole that misplaces be not positioned at simultaneously lamp plate back side point directly over.
In LED fluorescent lamp of the present invention, also comprise the end cap that is positioned at described lampshade two ends, the described end cap of every end is assembled together heat dissipating housing, lamp plate and the lampshade of a corresponding end respectively.
In LED fluorescent lamp of the present invention, have stomidium on the outside end face of described end cap, offered a plurality of side openings on its circumference side, described stomidium and side opening all with described lampshade and heat dissipating housing internal communication.
In LED fluorescent lamp of the present invention, described LED fluorescent lamp also comprises the power supply shell that described power supply is dressed a corpse, and described power supply shell places in the described heat dissipating housing and is close on the heat dissipating housing inner surface.
In LED fluorescent lamp of the present invention, described heat dissipating housing and dissipating cover are the aluminium sheet of heat conduction.
In LED fluorescent lamp of the present invention, the lateral surface of described heat dissipating housing is the irregular face of cylinder, and local crowning or recessed is arranged on it.
In LED fluorescent lamp of the present invention, described lamp plate is the pcb board of glass fibre RF-4, described LED have a plurality of and array arrangement on described lamp plate.
In LED fluorescent lamp of the present invention, the end face of described lampshade is " C " shape, and there is the interior hook that inwardly stretches at the two ends of opening.
In LED fluorescent lamp of the present invention, the end face of described heat dissipating housing is " C " shape, and the two ends of its opening are provided with water jacket near lateral surface, and the position of close medial surface is provided with inside groove; Described lamp plate (20) both sides snap in the inside groove, and the interior hook of described lampshade then buckles in the water jacket of heat dissipating housing.
Implement LED fluorescent lamp of the present invention, have following beneficial effect:, effectively promoted the heat radiation of lamp body inside by the cross-ventilation between heat dissipating housing and the dissipating cover; Simultaneously between the hole of being offered on heat dissipating housing and the dissipating cover stagger mutually in the position, can prevent effectively that dust from entering, and guarantees the cleaning that light fixture is interior when not influencing heat radiation, and preventing that harmful dust from entering influences lighting quality and lamp life.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the part explosive view of LED fluorescent lamp preferred embodiment of the present invention;
Fig. 2 is LED fluorescent lamp longitudinal sectional view and a partial enlarged drawing embodiment illustrated in fig. 1;
Fig. 3 is a LED fluorescent lamp transverse sectional view embodiment illustrated in fig. 1;
Fig. 4 is the end cap structural representation of LED fluorescent lamp embodiment illustrated in fig. 1.
The specific embodiment
The invention provides a kind of LED fluorescent lamp, its part explosive view comprises lampshade 10, lamp plate 20, LED30, power supply 40, power supply shell 50, heat dissipating housing 60, dissipating cover 70 and end cap 80 as shown in Figure 1.
As shown in Figure 1 and Figure 2, wherein, lamp plate 20 is the pcb board of elongated rectangular shape, and the pcb board material is the glass fibre of RF4 grade, which is provided with the jack of a plurality of array distribution, so that the grafting of LED 30.LED 30 inserts same array arrangement in the jack successively, thereby is electrically connected with pcb board, can control the illumination of LED 30 by the circuit design of pcb board.Lampshade 10 is approximate semi-cylindrical shaped, and promptly its end face is " C " shape, and there is the interior hook 11 that inwardly stretches at the two ends of opening, and is convenient to be installed to heat dissipating housing 60.Lampshade 10 is positioned at lamp plate 20 fronts, and LED 30 is covered on its inside.Usually lampshade 10 is transparent, so that the light transmission that LED 30 is sent, it also can make other different colours according to lighting demand, and this paper does not add at this and gives unnecessary details.
Power supply 40 is contained in the back side of lamp plate 20.In a preferred embodiment of the invention, as shown in Figure 1 and Figure 2, power supply 40 does not directly contact with lamp plate 20, but is contained in the power supply shell 50 of an insulation, and power supply 40 is adjacent on the power supply shell 50, makes the heat that sends can fully be delivered on the power supply shell 50 to dispel the heat.Power supply shell 50 does not equally contact with lamp plate 20 yet, but is connected on heat dissipating housing 60 inwalls, as shown in Figure 3 by gluing or other fixed forms.Like this, the then work that has influence on lamp plate 20 that the heat that sent of power supply 40 can be few as far as possible, its heat is transmitted on the heat dissipating housing 60 by power supply shell 50.Heat dissipating housing 60 is the sheet material of aluminium matter, has good heat conductivility, can be to greatest extent to power supply 40 heat radiations.
By above-mentioned known, the periphery of power supply shell 50 also is equipped with heat dissipating housing 60 and is close to heat dissipating housing 60 inwalls.As Fig. 1, shown in Figure 3, heat dissipating housing 60 also is the aluminium sheet of approximate " C " shape of end face, and the equal in length of its length and lampshade 10 is synthesized the fluorescent tube of near cylindrical with lampshade 10, and in lamp plate 20, LED 30 and power supply 40 and power supply shell 50 be enclosed in.The two ends of heat dissipating housing 60 " C " shape opening are provided with water jacket 61 near lateral surface, and the position of close medial surface is provided with inside groove 62; Lamp plate 20 both sides snap in the inside groove 62, and 11 on the interior hook of lampshade 10 buckles in the water jacket 61 of heat dissipating housing 60.In addition, the nearly face of cylinder, the outside of heat dissipating housing 60 is not smooth smooth circular arc, but similar corrugated rising and falling makes part projection or recessed continuously, as shown in Figure 3.She Ji advantage is to increase to greatest extent the contact area with air like this, thereby increases the ability of thermal convection current and radiation.
The characteristics of the embodiment of the invention are, length direction at the whole lamp in the upper edge, upper surface of heat dissipating housing 60 offers a row through hole, is louvre 64, and above heat dissipating housing 60 upper surfaces a dissipating cover 70 is installed also, also offer a row through hole on the dissipating cover 70, be dislocation of the present invention hole 74.Dislocation hole 74 is positioned at louvre 64 tops, but not directly over louvre 64 correspondences vertical.That is to say, louvre 64 and dislocation hole 74 be not positioned at simultaneously lamp plate 20 back side points directly over.Form a gap owing to be separated with certain distance between dissipating cover 70 and radiating seat 60 upper surfaces, make the hot-air in the heat dissipating housing 60 to overflow from louvre 64, then through this gap and enter dissipating cover 70 inside, pass the dislocation hole 74 on the dissipating cover 70 at last and enter into the extraneous air environment.
Adopt the design in such hole of staggering, the heat that the interior volume LED 30 that purpose is to make dissipating cover 60 and lampshade 10 to be surrounded sends can pass in time by convection current, strengthens the heat-sinking capability of light fixture.Stagger between louvre 64 and the dislocation hole 74, can prevent effectively that dust from directly entering into illuminating effect and lighting safety that lamp interior influences the LED fluorescent lamp, do not influence convection effects simultaneously again.
Those skilled in the art knows that also louvre 64 can be designed to multiple row as required, and the shape of louvre 64 is not had particular requirement yet, as long as can realize the circulation of air heat radiation, is louvre 64 of the present invention.Those skilled in the art can know equally, dislocation hole 74 also can be multiple row, and its shape is particular requirement not also, as long as it can be passed in the external environment by it for through hole can guarantee heat dissipating housing 60 interior air, and the hole is not positioned at directly over louvre 64 vertical, is dislocation of the present invention hole.
In addition, according to Fig. 1,2 as can be known, end cap 80 is equipped with at lampshade (10) two ends, and the end cap 80 of every end is in the same place heat dissipating housing 60, lamp plate 20 and lampshade 10 mounts of a corresponding end respectively.As shown in Figure 4, have stomidium 81 on the outside end face of end cap 80, offered a plurality of side openings 82 on its circumference side, and stomidium 81 and side opening 82 all are communicated with the inner space that lampshade 10 and heat dissipating housing 60 are surrounded.Therefore, cold air in the external environment can enter in lampshade 10 and the heat dissipating housing 60 by stomidium 81 and side opening 82, the heat that absorption LED 30 is sent becomes hot-air, overflow from louvre 74 subsequently, enter into the outside air environment from dislocation hole 74 at last through dissipating cover 60, thereby form a convection circulation, guarantee continuing of heat radiation with efficient.
In conjunction with the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.