CN101761807A - LED illuminator and LED modules - Google Patents

Abstract

The present invention provides an LED lighting device and an LED module. The LED lighting device includes a lamp housing and at least two LED modules. The LED modules are arranged in the lamp housing, and each LED module further includes a circuit board and a light-transmitting unit. Several LED particles are arranged on the circuit board, the light-transmitting unit covers the LED particles on the circuit board, and the circuit board and the light-transmitting unit are provided with a plurality of heat dissipation through holes corresponding to positions, and form a plurality of heat dissipation channels. The invention has good heat dissipation effect and long service life.

Description

LED lighting device and LED module

technical field

The invention relates to the field of lighting technology, in particular to an LED lighting device and an LED module with high heat dissipation effect.

Background technique

At present, with the development trend of energy saving and emission reduction, LED (Light Emitting Diode, light emitting diode) is more and more widely used due to its energy saving, environmental protection, high luminous efficiency, long life and other characteristics, because it generates less heat when working , with high luminous efficiency, it is regarded as a cold light source, and it has a tendency to replace traditional incandescent and fluorescent lamps. However, when the LED is actually used, it will also generate a certain amount of heat. The temperature of the PN junction of the LED should be less than 80°C when the LED is in normal operation. If the temperature is high, the life of the LED will be significantly shortened. For high-power LEDs used in street lights In other words, this situation is more serious. Therefore, the heat dissipation problem of LEDs in use has become one of the main research directions of relevant technical personnel.

In order to improve the heat dissipation effect of LED lighting devices, the industry often installs heat sinks on LED lighting devices, such as Chinese patent application number 200910101200.5, the invention patent named "LED street lamp", please refer to Figure 1, which discloses an LED street lamp It includes a transparent lampshade 1, a casing 2, LED diodes 3, a circuit board 4, and a heat sink 5, and an exhaust fan cover 6 is arranged on the back of the heat sink 5, and an exhaust fan 7 is arranged on the exhaust fan cover 6. During the working process, the heat generated by the LED diode 3 is transmitted to the heat sink 5 via the circuit board 4 , and then dissipated into the air by the heat sink 5 , and the exhaust fan 7 further improves the heat dissipation effect of the heat sink 5 .

Although the existing LED lighting device can achieve a certain heat dissipation effect by using heat sinks, as far as the current LED lighting device is concerned, its LED particles are usually installed in the same lamp housing. Because a large number of LEDs generate a lot of heat when they work, and this solution of concentrating a large number of LED particles in a single module will cause heat to be difficult to dissipate, especially the heat in the central area of the lamp housing is higher, which is not conducive to heat dissipation; at the same time, the light source emits The heat of the LED will often affect the working temperature of the driving circuit in the same shell, shorten its service life, and is not conducive to the maintenance of the power supply; finally, because the high-power LED lamp is large in size, if a part of the device is broken, the whole lamp needs to be replaced. The lamp is disassembled and returned to the manufacturer for maintenance, which affects normal use and increases maintenance costs.

Contents of the invention

The object of the present invention is to provide two kinds of LED lighting devices to solve the problems of difficult heat dissipation and inconvenient maintenance of the existing LED lighting devices.

Another object of the present invention is to provide an LED module to solve the problems of difficult heat dissipation and inconvenient maintenance of existing LED lighting devices.

The invention provides an LED lighting device, which includes a lamp housing and at least two LED modules. The LED modules are arranged in the lamp housing, and each LED module further includes a circuit board and a light-transmitting unit. Several LED particles are arranged on the circuit board, the light-transmitting unit covers the LED particles on the circuit board, and the circuit board and the light-transmitting unit are provided with a plurality of heat dissipation through holes corresponding to positions, and form a plurality of heat dissipation channels.

According to the LED lighting device described in the preferred embodiment of the present invention, the heat dissipation through-holes are linearly arranged on the circuit board and the light-transmitting unit, and divide the internal LEDs into several parts.

According to the LED lighting device described in the preferred embodiment of the present invention, it also includes a heat sink, the heat sink is provided with flat or curved fins, and the base of the heat sink is provided with corresponding heat dissipation through holes. Connected to the radiator.

According to the LED lighting device described in the preferred embodiment of the present invention, it further includes at least two heat sinks, the number of heat sinks corresponds to the number of LED modules, and each heat sink is provided with flat or curved fins , and each heat sink base is provided with a corresponding heat dissipation through hole, and each LED module is connected with a heat sink.

According to the LED lighting device described in the preferred embodiment of the present invention, a through pipe extends through the heat dissipation channel of each LED module (22).

According to the LED lighting device described in the preferred embodiment of the present invention, each LED module also includes a sealing ring, and the sealing ring is arranged around the circuit board and at the position of the heat dissipation through hole, and the sealing ring is also provided with a corresponding through hole .

The present invention further provides an LED module, and at least two LED modules are jointly arranged in one LED lighting device. This LED module includes a circuit board and a light-transmitting unit. The circuit board is provided with a number of LED particles. The light-transmitting unit covers the LED particles on the circuit board. holes and form multiple cooling channels.

According to the LED module described in the preferred embodiment of the present invention, the heat dissipation vias are linearly arranged on the circuit board and the light-transmitting unit, and divide the internal LEDs into several parts.

The present invention also provides an LED lighting device, which includes a lamp housing and an LED light source for the entire lamp. A circuit board and a light-transmitting plate are arranged inside the LED light source, and a plurality of LED particles are arranged on the circuit board, and the light-transmitting plate covers the LED particles on the circuit board. Wherein, the circuit board and the light-transmitting plate are provided with a plurality of heat dissipation through holes, and form a plurality of heat dissipation channels.

According to the LED lighting device described in the preferred embodiment of the present invention, the heat dissipation vias are arranged in a linear array on the circuit board and the light-transmitting board, and divide the internal LEDs into several parts.

Compared with the prior art, the beneficial effect of the present invention is that: the present invention provides heat dissipation through holes on the circuit board and light-transmitting parts of the LED module or the LED light source, so that air convection is formed between the adjacent LEDs inside, and the relative heat dissipation is reduced. The heat conduction between adjacent parts of LEDs effectively reduces the working temperature of the LED lighting device, thereby greatly increasing its service life; the invention also proposes a concept of LED modular lamps. When a module of the lamp is broken, the Without affecting the lighting use of other LED modules, only this module needs to be replaced, which significantly reduces maintenance costs and increases convenience.

Description of drawings

Fig. 1 is a structural diagram of an embodiment of an LED street lamp with Chinese patent application number 200910101200.5;

Fig. 2 is a structural diagram of an embodiment of the LED lighting device of the present invention;

Fig. 3 is an exploded view of an embodiment of the LED module of the present invention;

Fig. 4 is a cross-sectional view of an embodiment of the LED module of the present invention;

Fig. 5 is an exploded view of an embodiment of the LED module of the present invention;

Fig. 6 is an exploded view of an embodiment of the LED module of the present invention;

Fig. 7 is an exploded view of an embodiment of the LED module of the present invention;

Fig. 8 is an exploded view of an embodiment of another LED lighting device of the present invention;

Fig. 9 is an overall view of an embodiment of another LED lighting device of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 2 , which is a schematic structural diagram of an LED lighting device proposed by the present invention. The LED lighting device of this embodiment is mainly composed of a lamp housing 21 and six LED modules 22. The LED modules 22 are arranged on the lamp housing 21, and the lamp housing 21 is connected to the lamp post 23 through a central beam. 21 and the beam can be connected in multiple ways such as clamping, chute, screw thread and the like. Among them, the feature of the present invention is that each LED module 22 is provided with a plurality of heat dissipation channels 24, the existence of the heat dissipation channels 24 can form air convection inside the LED module 22, greatly improving the heat dissipation performance of the entire LED lighting device. In addition, the LED module 22 provided with the heat dissipation channel 24 cooperates with the heat sink 37 connected to the rear end of the LED module 22, so that the LED lighting device has a very prominent heat dissipation effect.

The structure of a single LED module 22 is introduced below, as shown in Figure 3, which are respectively an exploded view and an overall view of an embodiment of the LED module of the present invention, the LED module 22 includes a circuit board 31, a sealing ring 32, a lens The group 33 and the light-transmitting cover 34, the lens group 33 and the light-transmitting cover 34 together constitute the light-transmitting unit of the LED module 22, wherein twenty-four LED particles 35 are welded on the circuit board 31, the lens group 33 and the light-transmitting cover 34 All are covered on the LED particles 35 of the circuit board 31 . Wherein, the circuit board 31 , the lens group 33 and the translucent cover 34 are provided with a plurality of corresponding heat dissipation through holes 36 , and the corresponding position of the heat dissipation through holes 36 can form the heat dissipation channel 24 through the LED module 22 . The heat dissipation through holes 36 are arranged in a “cross” shape, so that the heat dissipation through holes 36 divide the LED particles 35 into four parts, and each part contains six LED particles 35 .

In the actual working process, each part of the LED particles 35 will emit a certain amount of heat, and the heat inside the circuit board is particularly concentrated. The existence of the heat dissipation through hole 36 interrupts the mutual baking channel between the two adjacent parts of the LED particles 35 , thereby reducing the heat conduction between adjacent LED particles 35, thus effectively reducing the working temperature. Moreover, the circuit board 31 is connected to the base of the heat sink 37, and the same position on the heat sink 37 is also provided with a heat dissipation through hole 36, air convection is generated in the heat dissipation channel 24 of the LED module 22, hot air rises, and cold air comes in from below , taking away a large amount of heat, so that the heat flow in the heat dissipation channel 24 can be effectively dissipated into the air, and the heat dissipation effect of the LED module 22 is greatly improved to a higher level.

Since each part of the LED module 22 has a heat dissipation through hole 36, in order to ensure the sealing of the LED module 22, this embodiment also sets a sealing ring 32 at the position of the heat dissipation through hole 36 of the circuit board 31, and uses a transparent The photomask 34 is pressed onto the circuit board 31 , and the sealing ring 32 is also provided with corresponding heat dissipation through holes 36 to ensure the circulation of hot air.

In addition, in order to further improve the structural strength and sealing performance of the LED module 22, the through-pipe 101 can be extended through the heat-dissipating through-hole 36, as shown in FIG. Towards the inside of the LED module 22 , passes through the circuit board 31 , and contacts the base of the heat sink 37 . After the through pipe 101 is provided, a single LED module 22 can be positioned and installed through the through pipe 101 , making the installation more convenient.

The LED module 22 in FIG. 3 discloses a preferred embodiment of the present invention, but does not limit the present invention, and the specific structure of the LED module 22 can be adjusted as required. For example, in addition to the "cross" shape, the shape of the heat dissipation through hole 36 can also be arranged in other linear rows and columns, such as "X" shape, "∥ shape, "=" shape, etc.; the LED particles 35 welded on the circuit board 31 The quantity can also be adjusted according to actual needs; the quantity of heat dissipation through holes 36 can be opened according to the quantity of LED particles 35, as long as the quantity of LED particles 35>=2, just can consider drilling; one LED module 22 can be configured with one The heat sink 37 can also be configured and connected to the same heat sink 37 by a plurality of LED modules 22; The shape is set into a certain arc shape.

Here, the applicant also discloses several other typical structures of the LED module. In Fig. 5, sixteen LED particles 35 are welded on the circuit board 31, and the heat dissipation through hole 36 forms a shape combining a "cross" and a "word", and each LED particle 35 of the circuit board 31 is Separated to achieve a strong heat dissipation effect. In FIG. 6 , the lens group is assembled on the light-transmitting cover, and the light-transmitting cover 64 with lenses is formed by integral molding, which improves light transmittance and saves production cost. In Fig. 7, the combination of the lens group 33 and the fixed frame 74 is used to replace the combination of the lens group 33 and the translucent cover 34, which can achieve two technical effects: firstly, the fixed frame 74 can adopt various materials and various appearances, It can endow the LED lighting device with more appearance design elements; secondly, it reduces the mold-making cost and difficulty of the light-transmitting parts.

The LED lighting device using the LED module is beneficial for disassembly and maintenance. Of course, the through-hole structure of the present invention can also be applied to the LED lighting device with a single LED light source 22 . To this end, the present invention also proposes an LED lighting device, as shown in FIG. 8 and FIG. 9 , which are respectively an exploded view and an overall view of an embodiment of the LED lighting device of the present invention. The lamp housing of this LED lighting device is formed by splicing a front cover 81 and a rear cover 82 , and a lamp pole hole 83 is provided at the lower end of the lamp housing for installing a lamp pole. An LED light source and a radiator 84 are arranged inside the lamp housing, and the LED light source is connected to the back of the radiator 84 . Among them, the whole LED light source is composed of a circuit board 85, a light-transmitting plate 86 and a sealing ring 87. There are many LED particles 88 welded on the circuit board 85, and the circuit board 85, the light-transmitting plate 86, the sealing ring 87 are provided with corresponding heat dissipation through holes 89, and form a plurality of heat dissipation channels.

In this embodiment, the heat dissipation channels are arranged in a "cross" shape (other linear arrangements are also possible), and the LED particles 88 on the circuit board 85 are divided into four parts. Therefore, during the working process of the LED lighting device Among them, the heat generated by the adjacent parts of the LED will form air convection in the heat dissipation channel, and be dissipated into the air through the heat sink 84, thereby greatly improving the heat dissipation effect of the LED lighting device and effectively prolonging its service life.

The present invention provides heat dissipation through holes on the circuit board and light-transmitting parts of the LED module or the LED light source, so that air convection is formed between the adjacent LEDs inside, and the heat conduction between the adjacent LEDs is reduced, effectively reducing the heat dissipation. The operating temperature of the LED lighting device, thus greatly increasing its service life.

The above disclosures are only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes conceivable by those skilled in the art should fall within the protection scope of the present invention.

Claims (10)

1. LED lighting device, comprise a lamp housing (21), it is characterized in that, it also comprises at least two led modules (22), those led modules (22) are arranged in this lamp housing (21), and each led module (22) comprises a circuit board (31) and a printing opacity unit again, this circuit board (31) is provided with some LED particles (35), this printing opacity unit covers on the LED particle (35) of this circuit board (31), and be provided with a plurality of heat radiation through holes (36) of position correspondence on this circuit board (31) and this printing opacity unit, and form a plurality of heat dissipation channels.

2. LED lighting device as claimed in claim 1 is characterized in that, those heat radiation through holes (36) are linearity and are arranged on this circuit board (31) and this printing opacity unit, and the LED of inside is divided into several portions.

3. LED lighting device as claimed in claim 1, it is characterized in that, it also comprises a radiator (37), this radiator (37) is provided with fin smooth or that radian is arranged, this radiator (37) pedestal is provided with corresponding heat radiation through hole (36), and those led modules (22) all link to each other with this radiator (37).

4. LED lighting device as claimed in claim 1, it is characterized in that, it also comprises at least two radiators (37), the quantity of this radiator (37) is corresponding with the quantity of this led module (22), each radiator (37) is provided with fin smooth or that radian is arranged, and each radiator (37) pedestal is provided with corresponding heat radiation through hole (36), and each led module (22) links to each other with one radiator (37).

5. LED lighting device as claimed in claim 1 is characterized in that, siphunculus has all stretched through in the heat dissipation channel of each led module (22).

6. LED lighting device as claimed in claim 1, it is characterized in that, each led module (22) also comprises a sealing ring (32), and sealing circle (32) is arranged on circuit board (31) position of a circle and heat radiation through hole (36) all around, and also is provided with corresponding through hole on the sealing circle (32).

7. led module, and at least two led modules (22) are co-located in the LED lighting device, it is characterized in that, this led module (22) comprises a circuit board (31) and a printing opacity unit, this circuit board (31) is provided with some LED particles (35), this printing opacity unit covers on the LED particle (35) of this circuit board (31), and is provided with a plurality of heat radiation through holes (36) of position correspondence on this circuit board (31) and this printing opacity unit, and forms a plurality of heat dissipation channels.

8. led module as claimed in claim 7 is characterized in that, those heat radiation through holes (36) are arranged on this circuit board (31) and this printing opacity unit with linearity, and the LED of inside is divided into several portions.

9. LED lighting device, comprise that a lamp housing and a LED put in order lamp source, the whole lamp source inside of this LED is provided with a circuit board (85) and a light-passing board (86), this circuit board (85) is provided with plurality of LEDs particle (88), this light-passing board (86) covers on the LED particle (88) of this circuit board (85), it is characterized in that this circuit board (85) and this light-passing board (86) are provided with a plurality of heat radiation through holes (89), and form a plurality of heat dissipation channels.

10. LED lighting device as claimed in claim 9 is characterized in that, those heat radiation through holes (89) are linear array and are arranged on this circuit board (85) and this light-passing board (86), and the LED of inside is divided several portions.

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