CN211481552U

CN211481552U - Outdoor rainproof power supply for LED lamp

Info

Publication number: CN211481552U
Application number: CN202020175786.1U
Authority: CN
Inventors: 董刚
Original assignee: Shenzhen Jinyipai Technology Co ltd
Current assignee: Shenzhen Jinyipai Technology Co ltd
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-09-11
Anticipated expiration: 2030-02-17

Abstract

The utility model provides an outdoor rainproof power supply for LED lamps, which comprises an LED lamp power supply circuit arranged on a PCB board and used for converting commercial power into power required by an LED lamp; the PCB is arranged in a rainproof power box separated from the LED lamp, and the rainproof power box comprises a box body with a front cover, a bottom plate and a top cover; the edge that the box both sides face is close to the back face all is equipped with the vertical recess that leaks of arranging, and the top cap all is provided with waterproof arch about and at the back, the protecgulum both sides be provided with the installation bead of box front mounting spout looks adaptation, be provided with the transom formula transom in box both sides. The utility model discloses in set up rain-proof power supply box specially, prevent to influence power life because LED lamps and lanterns generate heat.

Description

Outdoor rainproof power supply for LED lamp

Technical Field

The utility model relates to a LED drive power supply field, especially a rain-proof power of outdoor LED lamp.

Background

Because of the energy-saving characteristic of LED lamps, more and more street lamps use LED lamps, at present, the LED street lamps generally adopt a vertical cement rod as a lamp post, a supporting inclined rod supporting lamp body obliquely extends out from the position, close to the top, of the lamp post, one surface of the lamp body is an LED lamp surface, the LED lamp in one face illuminates the pedestrian below, while the other face is surrounded by a housing, the shell is also provided with a PCB board of the power supply of the LED street lamp, the power supply of the street lamp and the lamp body are integrated, commercial power enters the tubular supporting inclined rod from the lamp post and enters the lamp body, the same sealed shell can be adopted to prevent the lamp body and the power supply from rain, the cost can be saved, however, because the LED lamp body heats, the shell (shell) of the lamp body is also a heat dissipation device of the LED lamp, and the PCB arranged in the shell is in a high-temperature state, so that the service life of the power supply of the LED lamp on the PCB is reduced.

Disclosure of Invention

The utility model discloses in the rain-proof LED lamp of outdoor needs such as to present street lamp, the PCB board that is provided with LED lamp power is installed in same casing with the LED lamp body, makes the PCB board be in the high temperature state, will lead to the LED lamp power life-span on the PCB board to reduce, provides the rain-proof power of outdoor LED lamp, among this rain-proof power of outdoor LED lamp, provides a rain-proof case for LED lamp power in addition.

The utility model discloses realize that its technical purpose technical scheme is: an outdoor rainproof power supply for an LED lamp comprises an LED lamp power supply circuit, a power supply circuit and a power supply control circuit, wherein the LED lamp power supply circuit is arranged on a PCB and is used for converting commercial power into power required by the LED lamp; the PCB is arranged in a rainproof power box separated from the LED lamp, and the rainproof power box comprises a box body with a front cover, a bottom plate and a top cover; the edge that the box both sides face is close to the back face all is equipped with the vertical recess that leaks of arranging, and the top cap all is provided with waterproof arch about and at the back, the protecgulum both sides be provided with the installation bead of box front mounting spout looks adaptation, be provided with the transom formula transom in box both sides.

The utility model discloses in set up rain-proof power supply box specially, prevent to influence power life because LED lamps and lanterns generate heat.

Further, in the rain-proof power of above-mentioned outdoor LED lamp: the back of the rainproof power supply box is also provided with a mounting hole for fixing the rainproof power supply box, and a waterproof gasket is arranged in the mounting hole.

Further, in the rain-proof power of above-mentioned outdoor LED lamp: the PCB is provided with a cable hole, mains supply is LED into the PCB from the cable hole, and a power supply required by the LED lamp converted by the LED lamp power supply circuit on the PCB is LED out from the cable hole to be connected with the LED lamp.

Further, in the rain-proof power of above-mentioned outdoor LED lamp: the power circuit of the LED lamp comprises a rectifying circuit, a filter circuit, a current detection resistor R1, an optical coupler U1, a switching tube Q1 arranged between a source side coil of a switching transformer T1 and the ground, and a PWM signal generating device U2 for controlling the switching tube Q1, wherein the output of the filter circuit is connected with the LED lamp through a cable leading out of a rainproof power box from a cable hole, and then is LED into the rainproof power box from the cable hole and grounded through a detection resistor; two ends of the current detection resistor R1 are respectively connected with two ends of a source side of the optocoupler U1, an output end of the optocoupler U1 is connected with a control end of the PWM signal generating device U2, the PWM signal generating device U2 generates PWM with at least two duty ratios and is connected with a grid electrode of the switching tube Q1, and when a signal of the control end of the PWM signal generating device is effective, a PWM signal with a low occupation mode is output.

Further, in the rain-proof power of above-mentioned outdoor LED lamp: the source side of the switching transformer T1 further includes a PFC controller U3, and the mains supply is connected to both ends of the primary winding of the switching transformer T1 after passing through the PFC controller U3.

Further, in the rain-proof power of above-mentioned outdoor LED lamp: the current detecting resistor R1 is a resistor with adjustable resistance, and an adjusting knob of the current detecting resistor R1 extends out of a knob hole arranged on the bottom plate.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

Figure 1 is the utility model discloses rain-proof power supply box structure picture in the rain-proof power of outdoor LED lamp.

Fig. 2 is the utility model discloses outdoor rain-proof power supply circuit schematic of LED lamp.

Detailed Description

The outdoor LED lamp rainproof power supply comprises an LED lamp power supply circuit which is arranged on a PCB and converts commercial power into power required by an LED lamp; the PCB board is arranged in a rainproof power supply box 100 separated from the LED lamp, the rainproof power supply box 100 comprises a box body 104 having a front cover 101, a bottom plate 102 and a top cover 103 as shown in fig. 1; the edges of two side faces of the box body 104 close to the rear plate face are provided with water leakage grooves 112 which are vertically arranged, the left, right and rear faces of the top cover 103 are provided with waterproof bulges 105, the two sides of the front cover 101 are provided with mounting convex edges 107 which are matched with the front mounting sliding grooves 106 of the box body 104, during assembly, when the PCB is mounted in the rainproof power supply box, only the convex edges 107 of the front cover 101 need to slide in from the sliding grooves 106 on the two sides of the front of the box body 100, and the two sides of the box body are provided with louver type ventilation windows 108. In addition, the back of the rainproof power supply box 100 is also provided with a mounting hole 109 for fixing the rainproof power supply box, and a waterproof gasket is arranged in the mounting hole 109. In this embodiment, it is fixed to the lamp pole with the hoop. The bottom plate 102 is provided with a cable hole 110, commercial power is LED into the PCB from the cable hole 110 on the PCB, and power required by the LED lamp converted by the LED lamp power circuit on the PCB is LED out from the cable hole 110 to be connected with the LED lamp.

The power circuit of the LED lamp comprises a rectifying circuit, a filter circuit, a current detection resistor R1, an optical coupler U1, a switching tube Q1 arranged between a source side coil of a switching transformer T1 and the ground, and a PWM signal generating device U2 for controlling the switching tube Q1, wherein the output of the filter circuit is connected with the LED lamp through a cable leading out of a rainproof power box 100 from a cable hole 110, and then LED into the rainproof power box 100 from the cable hole 110 and grounded through a detection resistor; the two ends of the current detection resistor R1 are respectively connected with the two ends of the source side of the optocoupler U1, the output end of the optocoupler U1 is connected with the control end of the PWM signal generating device U2, the PWM signal generating device U2 generates PWM with at least two duty ratios and is connected with the grid of the switching tube Q1, and when the signal of the control end is effective, a PWM signal with a low occupation mode is output. The source side of the switching transformer T1 further includes a PFC controller U3, and the mains supply is connected to both ends of the primary winding of the switching transformer T1 after passing through the PFC controller U3.

In this embodiment, as shown in fig. 2, the power circuit of the LED lamp on the PCB is a switching power supply of the LED street lamp, in the LED street lamp, an LED unit is formed by connecting a known number of LEDs in series, a plurality of such units are connected in series to form an LED lighting lamp, as shown in a dotted frame in fig. 1, the number of the LEDs connected in series is determined according to the working voltage of a single LED, the number of the LEDs connected in series is determined according to the dc voltage generated after rectification and filtering of the utility power, if the number of the LEDs is small, a transformer T1 is added when the utility power is connected to the utility power, so as to transform the utility power into a voltage adapted to the number of the LEDs, at present, a half-wave rectification mode is adopted to rectify the ac signal induced by the secondary coil of the switching transformer by using a large-current diode D1, so as to output a large power, or other rectification modes such as a full-wave rectification mode or a bridge rectification mode can be adopted, some silicon controlled rectifiers currently on the market can output considerable current, several watts of output power. The filter circuit may be implemented by using an electrolytic capacitor as the filter capacitor C1, or other filter circuits may be used in practice. As shown in fig. 1, the N-stage and L-line of the utility power are respectively connected to two ends of the PFC controller to form a dc output connected to the source side of the switching transformer T1, a switching tube Q1 is added between the source side of the switching transformer T1 and the ground, the gate of the switching tube Q1 is controlled by a PWM signal generating device, and the control of the magnitude of the secondary power is realized by the duty ratio of the PWM signal, in this embodiment, the PWM signal generating device generates PWM signals of at least two duty ratios, and the default output is the PWM signal with a higher duty ratio and is output to the gate of the switching tube Q1.

In the present embodiment, the in-phase terminal of the secondary winding of the transformer T1 is connected to the anode of the rectifier diode D1, i.e., the P pole, the cathode of the rectifier diode D1, i.e., the N pole, is connected to the filter, in the present embodiment, the filter is composed of an electrolytic capacitor C1, the cathode of the rectifier diode D1 is connected to the anode of the filter capacitor C1, and the cathode of the filter capacitor C1 is grounded.

The mains supply forms stable direct current to be connected to the LED string after being rectified and filtered, a filtering capacitor C1, namely the anode of an electrolytic capacitor, is connected with the input end of the LED string, namely the P pole of the LED, and is grounded through a current detection resistor R1, in the embodiment, because the LED lighting lamp has larger power, a smaller resistor can be selected by the current detection resistor R1, therefore, when the current is larger, the optical coupler can not be conducted, only when the current is larger than a set value, the optical coupler U1 can be conducted, the output end of the optical coupler U1 is connected with a PWM signal generating device U2, when the optical coupler U1 is conducted, the PWM signal generator U2 outputs a PWM signal with a lower duty ratio to control a switch tube Q1, therefore, the power output to the LED lighting lamp is reduced, the voltage optical couplers at two ends of the current detection resistor R1 cannot conduct the U1, and a control signal output to the PWM signal generating device U2 is converted into an invalid signal, the power output by the secondary side of the switch transformer is increased, and the operation is repeated, so that the LED lighting lamp is always in high power. And realizing the constant current of the LED.

In this embodiment, the power control circuit further includes an LED lamp power adjusting circuit, and the output power of the LED can be adjusted by using the power adjusting circuit, in this embodiment, a plurality of PWM signals with different duty ratios are set in the PWM generating device U2, and when the PWM signal with a higher duty ratio is selected to control the switching tube Q1, the resistance value of the current detection resistor R1 is adjusted, in this embodiment, the current detection resistor R1 is an adjustable resistance resistor, and the resistance value of the current detection resistor R1 corresponds to the duty ratio of the PWM signal output by the PWM signal generating device U2. The adjustment knob of the current detecting resistor R1 protrudes from the operation hole 111 provided in the base plate 102.

Claims

1. An outdoor rainproof power supply for an LED lamp comprises an LED lamp power supply circuit, a power supply circuit and a power supply control circuit, wherein the LED lamp power supply circuit is arranged on a PCB and is used for converting commercial power into power required by the LED lamp; the method is characterized in that: the PCB is arranged in a rainproof power supply box (100) separated from the LED lamp, and the rainproof power supply box (100) comprises a box body (104) with a front cover (101), a bottom plate (102) and a top cover (103); the edge that the both sides face of box (104) is close to the back face all is equipped with vertical arrangement's the recess that leaks (112), and the left and right sides of top cap (103) and back all are provided with waterproof arch (105), protecgulum (101) both sides be provided with the installation bead (107) of box (104) preceding installation spout (106) looks adaptation, be provided with shutter formula transom (108) in box both sides.

2. The outdoor LED lamp rainproof power supply of claim 1, wherein: the back of the rainproof power supply box (100) is also provided with a mounting hole (109) for fixing the rainproof power supply box, and a waterproof gasket is arranged in the mounting hole (109).

3. The outdoor LED lamp rainproof power supply of claim 2, wherein: the LED lamp is characterized in that a cable hole (110) is formed in the bottom plate (102), commercial power is LED into the PCB from the cable hole (110) on the PCB, and a power supply required by the LED lamp converted by the LED lamp power supply circuit on the PCB is LED out from the cable hole (110) to be connected with the LED lamp.

4. The outdoor LED lamp rainproof power supply of claim 3, wherein: the power circuit of the LED lamp comprises a rectifying circuit, a filter circuit, a current detection resistor R1, an optical coupler U1, a switching tube Q1 arranged between a source side coil of a switching transformer T1 and the ground, and a PWM signal generating device U2 for controlling the switching tube Q1, wherein the output of the filter circuit is connected with the LED lighting lamp through a cable leading out of a rainproof power box (100) from a cable hole (110), and then is LED into the rainproof power box (100) from the cable hole (110) and grounded through a detection resistor; two ends of the current detection resistor R1 are respectively connected with two ends of a source side of the optocoupler U1, an output end of the optocoupler U1 is connected with a control end of the PWM signal generating device U2, the PWM signal generating device U2 generates PWM with at least two duty ratios and is connected with a grid electrode of the switching tube Q1, and when a signal of the control end of the PWM signal generating device is effective, a PWM signal with a low occupation mode is output.

5. The outdoor LED lamp rainproof power supply of claim 4, wherein: the source side of the switching transformer T1 further includes a PFC controller U3, and the mains supply is connected to both ends of the primary winding of the switching transformer T1 after passing through the PFC controller U3.

6. The outdoor LED lamp rainproof power supply of claim 5, wherein: the current detecting resistor R1 is a resistor with adjustable resistance, and an adjusting knob of the current detecting resistor R1 extends out of an operation hole (111) arranged on the bottom plate (102).