CN201373358Y

CN201373358Y - LED spot lamp

Info

Publication number: CN201373358Y
Application number: CN200920135545U
Authority: CN
Inventors: 朱庆山; 何耀颐
Original assignee: SICHUAN JM SOLID-STATE LIGHTING Co Ltd
Current assignee: Shenzhen Jiuzhou Optoelectronics Technology Co Ltd
Priority date: 2009-03-11
Filing date: 2009-03-11
Publication date: 2009-12-30
Anticipated expiration: 2019-03-11

Abstract

The utility model discloses an LED spot lamp, which comprises a lamp body, a driving power source, an LED light source and a temperature detection element. The lamp body comprises a lamp holder and a lamp cup fixedly connected to the lamp holder, the driving power source is arranged in the lamp body, an input end of the driving power source is connected with a lamp base of the lamp holder, driving current of the LED light source can be adjusted according to feedback parameters of the temperature detection element, the LED light source is arranged in the lamp cup and is connected with an output end of the driving power source, the temperature detection element connected to the driving power source detects working temperature of the LED spot lamp and feeds back the working temperature to the driving power source. The LED spot lamp is provided with the temperature detection element which is used for detecting the working temperature of the LED spot lamp and can reduce or cut off the driving current of the LED light source when the temperature of the LED spot lamp is over high, thereby reducing heating value of the LED light source and effectively preventing the LED spot lamp from being in a high-temperature working state.

Description

The LED shot-light

Technical field

The utility model relates to a kind of lighting device, refers in particular to a kind of light emitting diode (LightEmitting Diode; LED) shot-light.

Background technology

For the LED shot-light, heat radiation is for weighing a very important factor of its performance, if the radiating effect of LED shot-light is not good, and cause its operating temperature too high, certainly will influence it and export every performances such as usefulness, service life such as light, even, may occur because the heat alluvial too much and directly burns out the situation of led chip.

The LED shot-light of commonly seeing, mainly dispel the heat by the Lamp cup of making by aluminum alloy materials, the heat that is produced during LED shot-light (particularly led chip wherein) work, transmit Lamp cup via Heat Conduction Material, distribute by Lamp cup again, thereby reach heat radiation and make the LED shot-light keep the purpose of suitable operating temperature.As State Intellectual Property Office in the disclosed LED shot-light of disclosed CN101338887A utility model patent on January 7 in 2009, the main body radiator of this shot-light constitutes by all-in-one-piece first radiator, second radiator and fin are installed, and is installed on the heat that led chip produced on the aluminium base via aluminium base, main body heat sink radiates.Yet, only play the usefulness of heat radiation with the radiator Lamp cup of radiator (or as), be difficult to comparatively ideally the operating temperature of LED shot-light is remained on a suitable degree, especially, during long-time or abnormal work, the heat that is produced fails in time to go out by heat sink radiates when the LED shot-light, simultaneously, the LED shot-light still continues heating, like this, the situation of led chip takes place very easily too much to burn out because of the heat alluvial.

Summary of the invention

The purpose of this utility model is to overcome the existing existing defective of LED shot-light, and a kind of LED shot-light with overheat protector function is provided.

For achieving the above object, the utility model adopts following technical scheme: a kind of LED shot-light, include a lamp body, a driving power, a led light source and a detector unit, and wherein, described lamp holder includes the Lamp cup that a lamp holder and is fixed in described lamp holder; Described driving power is arranged among the described lamp body, and its input is connected with the lamp base of described lamp holder, can regulate the drive current of described led light source according to the feedback parameter of described detector unit; Described led light source is arranged among the described Lamp cup, is connected with the output of described driving power; Described detector unit is connected in described driving power, and it detects the operating temperature of LED shot-light and feeds back to described driving power.

In the above-mentioned LED shot-light, described detector unit is a thermistor.

In the above-mentioned LED shot-light, described driving power includes an AC/DC unit, a DC/DC unit and a constant current control module that connects in turn.

In the above-mentioned LED shot-light, described detector unit is arranged among the described Lamp cup.

In the above-mentioned LED shot-light, described led light source includes an aluminum base PCB and at least one led chip that is arranged on the described aluminum base PCB, and described detector unit is arranged on the described aluminum base PCB.

In the above-mentioned LED shot-light, described Lamp cup includes a Lamp cup seat, a collector lens and Lamp cup lid, wherein, described Lamp cup seat is formed with a positioning part that is used to install described led light source, described collector lens is arranged among the described Lamp cup seat and is positioned at the top of described led light source, and described Lamp cup lid is fixed in described Lamp cup seat and fixing described led light source and collector lens.

In the above-mentioned LED shot-light, described Lamp cup seat and Lamp cup lid all adopt aluminum alloy materials to make.

In the above-mentioned LED shot-light, described driving power is arranged in the formed accommodation space of described lamp holder.

In the above-mentioned LED shot-light, described lamp holder and described Lamp cup are for removably connecting.

The beneficial effects of the utility model are: the LED shot-light is provided with detector unit, it is used to detect the operating temperature of LED shot-light and feeds back to the driving power that is attached thereto, driving power is adjusted the drive current of led chip in view of the above, like this, can when LED shot-light operating temperature be too high, reduce or cut off the drive current of led chip, thereby reduce the caloric value of led chip, avoid the LED shot-light to be in the hot operation state effectively, improve the LED shot-light such as every performances such as light output efficiencies, prolong the service life of LED shot-light.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described further.

Fig. 1 is the surface structure schematic diagram of the utility model LED shot-light.

Fig. 2 is the sectional structure schematic diagram of the utility model LED shot-light.

Fig. 3 is the decomposition texture schematic diagram of the utility model LED shot-light.

Fig. 4 is a kind of functional-block diagram of embodiment of the driving power of the utility model LED shot-light.

The specific embodiment

Referring to figs. 1 to shown in Figure 3, LED shot-light disclosed in the utility model mainly is made of a lamp body 10, a driving power 20, a led light source 30 and a detector unit 40.Detector unit 40 detects the operating temperature of LED shot-light, and transmit relevant parameter to driving power 20, driving power 20 is according to the parameter adjustment drive current that is transmitted, and the caloric value of regulating LED shot-light (particularly led light source 30), thereby the operating temperature of LED shot-light is remained in the suitable scope.

Lamp body 10 by a lamp holder 100 and one and the affixed Lamp cup 110 of lamp holder 100 form, wherein, lamp holder 100 has an accommodation space 101, it is used to take in driving power 20.

Driving power 20 is arranged among the accommodation space 101 of lamp holder 100, its input electrically connects by the lamp base 102 of lead and lamp holder 100, and output is connected with led light source 30 by lead, like this, driving power 20 can be by lamp holder 100 lamp base 102 from obtaining alternating current such as AC powers such as civil powers, and it is luminous to convert thereof into direct current rear drive led light source 30.

Led light source 30 is installed among the Lamp cup 110, and it includes a printed circuit board (PCB) (PrintedCircuit Board; PCB) 300 and a plurality of led chip 310 that is arranged on the PCB300, usually, a plurality of led chips 310 connect with series system, and certainly, the mode that also can adopt parallel connection or connection in series-parallel to mix connects.Preferably, PCB300 adopts aluminum base PCB, and it has good heat-conducting, the heat that led chip 310 is produced can be conducted to Lamp cup 110 fast, and distribute via Lamp cup 110.

Detector unit 40 detects the operating temperature of LED shot-light, and transmits relevant parameter to the driving power 20 that is attached thereto, and driving power 20 is regulated drive current according to this parameter.Because the heat of LED shot-light is mainly produced by led light source 30, so, suitable detector unit 40 is arranged among the Lamp cup 110, it can detect the variations in temperature of LED shot-light preferably, a kind of preferred scheme is that detector unit 40 is fixed on the aluminum base PCB, certainly, also can adopt other mode, for example it is closely attached on the inwall of Lamp cup 100.Detector unit 40 can be selected thermistor for use, also can select the device such as other types such as thermocouples for use.

In conjunction with shown in Figure 4, functional-block diagram for a kind of embodiment of driving power 20, it includes an AC/DC unit 200, an one DC/DC unit 210 and a constant current control module 220, wherein, the input of AC/DC unit 200 inserts civil power 50 by lamp base 102, the alternating current that is obtained is carried out that rectifying and wave-filtering is handled and the direct current that obtains high voltage, and be sent to DC/DC unit 210, DC/DC unit 210 with the direct current lowering and stabilizing blood pressure of high voltage after as the input of constant current control module 220, it is luminous further to handle rear drive led light sources 30 through constant current control module 220 again.Adopting the NTC thermistor with detector unit 40 below is that example describes, when the operating temperature of LED shot-light raises, the resistance value of NTC thermistor reduces and makes the voltage increase and feed back to constant current control module 220, constant current control module 220 is turned down according to this feedback parameter or at the drive current of regular hour internal cutting off led light source 30, reduce the caloric value of led chip 310, thereby reach the purpose that reduces LED shot-light operating temperature.

As shown in Figures 2 and 3, lamp body 10 includes lamp holder 100 and Lamp cup 110 two parts.Lamp cup 110 includes a Lamp cup seat 111, a collector lens 112 and Lamp cup lid 113, and wherein, Lamp cup seat 111 is formed with a positioning part 114, is used to install led light source 30; Collector lens 112 is arranged among the Lamp cup seat 111 and above led light source 30, is used to converge light and sets the emergent light angle; Lamp cup lid 113 is bolted on the Lamp cup seat 111 and plays the led light source 30 that is fixedly installed among the Lamp cup seat 111 and the effect of collector lens 112.

Preferably, the Lamp cup seat 111 of Lamp cup 110 and Lamp cup lid 113 all adopts aluminum alloy materials to make, and it has good heat-conducting, can accelerate distributing of heat that led light source 30 produced.

Be formed with a plurality of screws 103 on the lamp holder 100, Lamp cup seat 111 is formed with through hole 115 corresponding to screw 103 places, and use screw 116 passes through hole 115 and is screwed together in the screw 103, thereby realizes removably connecting of Lamp cup 110 and lamp holder 100, like this, be convenient to the attaching/detaching of LED shot-light.

Above-mentioned only is preferred embodiment of the present utility model, but not the utility model is done any pro forma restriction, and all equivalent variations or modifications of being done in the claim scope all should fall within the utility model protection domain.

Claims

1, a kind of LED shot-light includes:

One lamp body (10), it includes the Lamp cup (110) that a lamp holder (100) and is fixed in described lamp holder;

One driving power (20), described driving power (20) are arranged among the described lamp body (10), and its input is connected with the lamp base (102) of described lamp holder (100);

One led light source (30), it is arranged among the described Lamp cup (110), is connected with the output of described driving power (20);

It is characterized in that: described driving power (20) is connected with one and is used to detect the detector unit (40) of LED shot-light operating temperature, and regulates the drive current of described led light source (30) according to the feedback parameter of described detector unit (40).

2, LED shot-light as claimed in claim 1 is characterized in that: described detector unit (40) is a thermistor.

3, LED shot-light as claimed in claim 1 or 2 is characterized in that: described driving power includes an AC/DC unit (200), a DC/DC unit (210) and a constant current control module (220) that connects in turn.

4, LED shot-light as claimed in claim 1 is characterized in that: described detector unit (40) is arranged among the described Lamp cup (110).

5, LED shot-light as claimed in claim 1 is characterized in that: described led light source (30) includes an aluminum base PCB and at least one led chip that is arranged on the described aluminum base PCB.

6, LED shot-light as claimed in claim 5 is characterized in that: described detector unit (40) is arranged on the described aluminum base PCB.

7, as claim 1 or 2 or 4 or 5 described LED shot-lights, it is characterized in that: described Lamp cup (110) includes a Lamp cup seat (111), a collector lens (112) and Lamp cup lid (113), wherein, described Lamp cup seat (111) is formed with one and is used to install the positioning part (114) of described led light source (30), described collector lens (112) is arranged among the described Lamp cup seat (111) and is positioned at the top of described led light source (30), and described Lamp cup lid (113) is fixed in described Lamp cup seat (111) and fixing described led light source (30) and collector lens (112).

8, LED shot-light as claimed in claim 7 is characterized in that: described Lamp cup seat (111) and Lamp cup lid (113) all adopt aluminum alloy materials to make.

9, LED shot-light as claimed in claim 1 is characterized in that: described driving power (20) is arranged in the formed accommodation space of described lamp holder (100) (101).

10, LED shot-light as claimed in claim 1 is characterized in that: described lamp holder (100) and described Lamp cup (110) are for removably connecting.