CN102116431A

CN102116431A - LED (light-emitting diode) down lamp

Info

Publication number: CN102116431A
Application number: CN201110073193XA
Authority: CN
Inventors: 石玉洲
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-25
Filing date: 2011-03-25
Publication date: 2011-07-06

Abstract

The invention relates to an LED down lamp, and the technical key points are as follows: a rectifying and filtering ballast is arranged on the upper side of a radiator, the lower side of the rectifying and filtering radiator is connected with bee-conical condensation cups through a heat conducting baseplate, the bee-conical condensation cups are connected with a condensation bowl, a transparent lampshade is arranged outside the condensation bowl, LEDs are arranged at the bottoms of the bee-conical condensation cups, and the rectifying and filtering ballast is connected with an LED luminous protective circuit; the rectifying and filtering ballast comprises a rectifier bridge, the input end of the rectifier bridge is in series connection with a current-limiting capacitor of a shunt resistance, and the output end of the rectifier bridge is sequentially connected with a filter capacitor and a resistance in parallel; and the LED luminous protective circuit comprises one, two or more LEDs, which are connected mutually in series, each LED is further connected with a voltage stabilizing diode in parallel, and the output end of the rectifying and filtering ballast is connected with the input end of the LED luminous protective circuit. The LED down lamp can save electricity by 30% to 50%, and has simple structure, low maintenance cost and long service life, and is convenient for use.

Description

LED Down lamp light fixture

Technical field

The invention belongs to technical field of lamps, specifically a kind of LED Down lamp light fixture of relative reduction LED heating temp.

Background technology

As everyone knows, electric resources is one of mankind's valuable source of depending on for existence and development always, and its indispensable property and irreplaceability are the incontrovertible facts.Along with economic growth and social progress, the raising of the expansion of urban construction, Increase of population and people's quality of life, the utilization of electric resources sharply increases, cause the running of excess load to power supply system, and be that streets and lanes or local-style dwelling houses factory all will increase a considerable amount of lighting apparatus at night in order to obtain enough illuminations, these equipment majorities are based on common various light fixtures.Common light fixture is made up of the bulb single light source of different capacity, generally speaking because the power of bulb is big more just bright more, improves brightness and just realizes that by changing more powerful bulb the electric weight of Shi Yonging is just big more like this.In recent years, a kind of light fixture of doing light source with LED is used in a lot of fields, though it is a lot of than the common bulb power saving, but this LED light fixture is various in style, the LED lamp all is under the rated operational voltage luminous when using usually, it produces a large amount of heat energy, and therefore, the radiator that people use various structures passes the heat of its release.Although radiator can reduce the temperature of LED relatively, than higher, because the heat that LED self is produced is added environment temperature, high temperature tends to directly shorten the service life of LED to the LED of different structure for a long time to the environment for use temperature requirement.In addition, tradition LED rectification circuit is by the transformer step-down before bridge rectifier, in case the input voltage instantaneous variation takes place, such as being subjected to effects of lightning, then the output voltage of this transformer also changes simultaneously, causes voltage change between the PN junction of LED, connect phenomenon and produce to dodge, promptly continue lamp and dodge, this also will shorten the service life of LED greatly, and phenomenon also will increase people's visual fatigue simultaneously greatly taking place to dodge even.

Summary of the invention

The LED Down lamp light fixture that the purpose of this invention is to provide a kind of relative reduction LED heating temp.

The object of the present invention is achieved like this: it comprises LED, transparent lamp shade, heat-conducting substrate and radiator, it is characterized in that: the upside of described radiator is provided with a rectifying and wave-filtering ballast, the downside of radiator is connected with honeybee awl prefocus cup by heat-conducting substrate, this honeybee awl prefocus cup connects convergent bowl, the convergent bowl bottom of honeybee awl prefocus cup correspondence has cellular perforate, in the convergent bowl arranged outside transparent lamp shade is arranged, be provided with LED in honeybee awl prefocus cup bottom, the rectifying and wave-filtering ballast connects the luminous holding circuit of LED; Described rectifying and wave-filtering ballast includes a rectifier bridge (D ₁-D ₄), at rectifier bridge (D ₁-D ₄) input be serially connected with a resistance R in parallel ₁Current limiting capacitance C ₁, at rectifier bridge (D ₁-D ₄) output be parallel with filter capacitor C successively ₂And resistance R ₂The luminous holding circuit of LED includes one, two or more LED that are connected in series mutually, each LED also and be connected to a Zener diode, the output of rectifying and wave-filtering ballast is connected with the input of the luminous holding circuit of LED.

The luminous holding circuit of LED includes 3-7 the LED of serial connection mutually.

For the operating current that makes LED is lower than rated current, and then the operating temperature of LED is reduced greatly, prolongs the service life of LED, then the Zener diode current value for and meet the 50-85% of LED rated current.

The present invention is owing to adopt one to be parallel with resistance R ₁Current limiting capacitance C ₁Thereby, replaced transformer, greatly reduce electricity and decrease phenomenon, saved the 30-50% of actual power consumption; With LED and Zener diode that connects and current limiting capacitance C ₁Match, fundamentally eliminated the fluctuation of input power supply, but also played a part turning circuit relatively; That the present invention also possesses is simple in structure, easy to use, maintenance cost is low, advantages such as long service life.

Description of drawings

Fig. 1 is a sectional structure simplified schematic diagram of the present invention;

Fig. 2 looks up the structural representation sketch for Fig. 1's;

Fig. 3 is the right TV structure simplified schematic diagram of Fig. 1;

Fig. 4 is circuit theory diagrams of the present invention.

The present invention is described in further detail by example below in conjunction with accompanying drawing, but following example only is the present invention's example wherein, the rights protection scope of not representing the present invention and being limited, the scope of the present invention is as the criterion with claims.

The specific embodiment

Shown in Fig. 1～3; primary structure of the present invention includes 7 LED7, transparent lamp shade 5, heat-conducting substrate 6 and radiator 2; the upside of radiator is provided with a rectifying and wave-filtering ballast 1; the downside of rectifying and wave-filtering radiator is connected with honeybee awl prefocus cup 3 by heat-conducting substrate; this honeybee awl prefocus cup 3 connects convergent bowl 4; convergent bowl 4 bottoms of honeybee awl prefocus cup 3 correspondences have cellular perforate; in convergent bowl 4 arranged outside transparent lamp shade 5 is arranged; be provided with LED7 in honeybee awl prefocus cup bottom, the rectifying and wave-filtering ballast connects the luminous holding circuit of LED.

As shown in Figure 4, the rectifying and wave-filtering ballast includes a rectifier bridge D ₁-D ₄, at rectifier bridge D ₁-D ₄Input be serially connected with a resistance R in parallel ₁Current limiting capacitance C ₁, at rectifier bridge D ₁-D ₄Output be parallel with filter capacitor C successively ₂And resistance R ₂The luminous holding circuit of LED includes seven LED of serial connection mutually ₁-LED ₇, each LED also and be connected to a Zener diode, the output of rectifying and wave-filtering ballast is connected with the input of the luminous holding circuit of LED.

During use, power supply inserts from rectifying and wave-filtering ballast input, at first through current limiting capacitance C ₁And R ₁The current limiting capacitance current limliting enters rectifier bridge D then ₁-D ₄Carry out rectification, enter after the rectification because filter capacitor C ₂And resistance R ₂Carry out the metastable out-put supply of filtering, enter LED light holding circuit, by shown in Figure 2, the LED one of this example has 7, so the value of n is 7 among Fig. 4, at Zener diode D ₅-D ₁₁With current limiting capacitance C ₁Cooperation under, Zener diode D ₅-D ₁₁For and meet the 50-85% of LED rated current, and then to make the electric current of each LED be the 50-85% of rated current.

Its operating temperature with and decide the contrast such as the following table of operating temperature:

Environment temperature	LED temperature during the 50-85% rated current	LED temperature during 100% rated current
			20℃	39℃	52℃
25℃	42℃	55℃
			30℃	45℃	58℃
15℃	36℃	50℃

As above shown in the table, the LED temperature was low when the LED temperature was obviously than 100% rated current when the present invention had realized the 50-85% rated current, thereby had realized purpose of the present invention.

Claims

1. LED Down lamp light fixture, it comprises LED, transparent lamp shade, heat-conducting substrate and radiator, it is characterized in that: the upside of described radiator is provided with a rectifying and wave-filtering ballast, the downside of rectifying and wave-filtering radiator is connected with honeybee awl prefocus cup by heat-conducting substrate, this honeybee awl prefocus cup connects convergent bowl, the convergent bowl bottom of honeybee awl prefocus cup correspondence has cellular perforate, in the convergent bowl arranged outside transparent lamp shade is arranged, be provided with LED in honeybee awl prefocus cup bottom, the rectifying and wave-filtering ballast connects the luminous holding circuit of LED; Described rectifying and wave-filtering ballast includes a rectifier bridge (D ₁-D ₄), at rectifier bridge (D ₁-D ₄) input be serially connected with a resistance R in parallel ₁Current limiting capacitance C ₁, at rectifier bridge (D ₁-D ₄) output be parallel with filter capacitor C successively ₂And resistance R ₂The luminous holding circuit of LED includes one, two or more LED that are connected in series mutually, each LED also and be connected to a Zener diode, the output of rectifying and wave-filtering ballast is connected with the input of the luminous holding circuit of LED.

2. LED Down lamp light fixture according to claim 1 is characterized in that: the luminous holding circuit of LED includes 3-7 the LED of serial connection mutually.

3. LED Down lamp light fixture according to claim 1 is characterized in that: the Zener diode current value for and meet the 50-85% of LED rated current.