CN204313044U - Radiator and LED lamp with the radiator - Google Patents

Abstract

The utility model provides a radiator, which comprises a hollow radiating main body, wherein the lower end of the radiating main body is provided with a fixed base plate, an annular concave step is arranged between the outer edge of the fixed base plate and the radiating main body, a plurality of ribs with different heights are formed on the concave step by punching, and an air inlet is formed between the low ribs and the high ribs; the center of the inner cavity of the heat dissipation main body is provided with a central shaft, the lower end of the central shaft is fixedly connected with the fixed substrate, and the upper end of the central shaft is sleeved with an air deflector capable of automatically rotating. The LED lamps and lanterns with radiator are at the course of the work, and the heat direct conduction of production is to fixed baseplate, and the inside air of heat dissipation main part is heated by fixed baseplate, and hot-air rises, utilizes the hot convection principle of air to promote the aviation baffle, the utility model discloses need not also play the fan effect with the electric drive, realize forcing the convection heat dissipation to LED lamps and lanterns, strengthened the radiating effect of this radiator for this radiator is applicable to powerful LED lamp.

Description

Radiator and LED lamp with the radiator

technical field

The utility model relates to the technical field of radiators, in particular to a radiator and an LED lamp with the radiator.

Background technique

As we all know, LED lamps have the advantages of high brightness and energy saving, which makes them gradually replace traditional lighting sources and are used in more and more occasions. It has attracted more and more attention, especially in high-power LED lamps. Since high-power LEDs have a large rated operating current, most of their output power is converted into conduction heat. If effective heat dissipation measures are not taken, the accumulated heat will cause The temperature of the LED chip rises sharply. Excessive chip temperature will bring many problems: 1. Accelerate the aging of the device, shorten the service life, and even cause the chip to burn; 2. Red-shift the wavelength of the LED and affect the white LED. Chromaticity and color temperature have an important impact. If the wavelength shifts too much and deviates from the absorption peak of the phosphor, it will lead to a decrease in the quantum efficiency of the phosphor and affect the light output efficiency; 3. The temperature also has a great impact on the radiation characteristics of the phosphor. As the temperature rises, the quantum efficiency of the phosphor powder decreases, the light output decreases, and the radiation wavelength will also change. The change in the radiation characteristics of the phosphor powder will also cause changes in the color temperature and color change of the white LED. Higher temperatures will also accelerate the aging of the phosphor powder. 4. High working temperature will reduce the performance of LED lighting system. Test data show that the life of LED lighting system can reach 50,000 hours at room temperature, and the life of LED will be reduced to less than 7,000 hours when the working temperature is close to 90 degrees. It can be seen that one of the bottlenecks in the development of high-power LEDs is the heat dissipation of LED lights.

However, the heat sink structure of the LED lamp in the prior art is single, which affects the timely dissipation of heat by the LED lamp through radiation, conduction, convection and other forms, resulting in poor heat dissipation effect and unable to meet the heat dissipation requirements of the LED lamp. The heat dissipation of LED lamps determines the life of the whole lamp, so how to better solve the heat dissipation has always been the main consideration in the design of LED lamps. Under special conditions, in order to meet the heat dissipation requirements of lamps, fans are often used to forcibly dissipate heat from LED lamps. The purpose of forced convection cooling with fans is to increase the convection speed of the air on the surface of the heat sink and take away more heat with large air volume. Due to size and weight limitations, LED lamps equipped with fans for heat dissipation are generally large in size and complex in heat dissipation structure, and the fan must be driven by electricity to perform forced convection heat dissipation, which has the disadvantage of high power consumption.

Utility model content

Aiming at the problems of the prior art, the utility model provides a radiator and an LED lamp with the radiator, which can realize the effect of forced convection heat dissipation on the LED lamp without using electricity, has a simple heat dissipation structure, and is suitable for high-power lamps LED lights, wider range of application.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A heat sink, comprising a hollow heat dissipation body, the lower end of the heat dissipation body is provided with a fixed base plate for fixing a light source, and the fixed base plate is provided with several air inlets for air convection to enter; the inner portion of the heat dissipation body There is a central shaft in the center of the chamber, the lower end of which is fixedly connected to the fixed base plate, and an air deflector is set on the upper end of the central shaft, and several air outlets for air convection are arranged on the air deflector. An air convection channel is formed with the air outlet, and the air deflector rotates under the action of air convection.

Wherein, an annular inner concave step is arranged between the outer edge of the fixed substrate and the heat dissipation main body, and several high and low ribs are stamped and formed on the inner concave step, and the low ribs and the high ribs are formed between the low ribs and the high ribs. Inlet.

Wherein, the fixed base plate is an upwardly protruding rotary cone type fixed base plate, and the rotary cone type fixed base plate is integrally formed with the heat dissipation body; the circular array on the inclined surface of the rotary cone type fixed base plate is provided with several circular air inlets .

Wherein, the wind deflector includes a base plate part, a bearing is arranged between the center of the base plate part and the central shaft, and the wind deflector is sleeved on the central shaft through the bearing.

Further, the base plate is provided with the plurality of air outlets in a ring shape, and the base plate is extended and connected with a slope baffle at a certain angle with the base plate at the air outlet.

Preferably, the inclination angle between the slope baffle and the base plate is between 15° and 20°.

Wherein, the air deflector is set as a fan impeller, a collar is arranged in the middle of the fan impeller, and the bearing is located between the collar and the central shaft.

Wherein, the central axis is a hollow cylinder, and the side wall of the hollow cylinder is provided with a threading hole for the power supply wire to penetrate into the heat dissipation main body.

An LED lamp with the radiator includes an LED lamp board welded with several LED chips, a lens, a PC lampshade, a circular pressing ring and the radiator, and the LED lamp board is fixed and installed on the radiator by screws. Under the fixed base plate of the device, the circular pressing ring fixes and installs the PC lampshade and the lens under the LED lamp board sequentially from bottom to top.

Further, a hoisting seat is provided above the radiator, and the hoisting seat includes a fixed plate welded to the upper end surface of the central shaft and at least two groups of movable bolt clips.

The beneficial effects of the utility model:

    The radiator provided by the utility model includes a hollow heat dissipation main body, the lower end of the heat dissipation main body is provided with a fixed substrate for fixing the light source, and an annular concave step is arranged between the outer edge of the fixed substrate and the heat dissipation main body. A number of high and low ribs are punched and formed on the concave step, and an air inlet is formed between the low ribs and the high ribs; the center of the inner cavity of the heat dissipation body is provided with a central shaft, and the lower end of the central shaft is fixedly connected with the fixed base plate. The upper end of the central shaft is sheathed with a wind deflector that can rotate automatically. During the working process of the LED lamp with the heat sink, the heat emitted by the LED is directly conducted to the fixed substrate, and the air inside the heat dissipation body is heated by the fixed substrate, and the hot air rises. Using the principle of air heat convection, the air deflector can be pushed , the utility model does not need to be driven by electricity and also plays the role of a fan, which realizes forced convection heat dissipation for LED lamps and enhances the heat dissipation effect of the radiator. Not only the structure is simpler and more compact, but also the radiator is suitable for high-power LED lights, wider range of application.

Description of drawings

Fig. 1 is a structural perspective view of a radiator described in Embodiment 1 of the present utility model.

Fig. 2 is a first schematic diagram of the overall structure of the radiator described in the first embodiment of the utility model.

Fig. 3 is a schematic diagram 2 of the overall structure of a radiator described in Embodiment 1 of the present utility model.

Fig. 4 is a schematic structural diagram of an LED lamp with the heat sink in Embodiment 1 of the present utility model.

Fig. 5 is an exploded view of the structure of the LED lamp with the heat sink in the first embodiment of the present utility model.

Fig. 6 is a schematic structural diagram of an LED lamp with the radiator described in Embodiment 2 of the present utility model.

Fig. 7 is a schematic structural diagram of an LED lamp with the radiator described in Embodiment 3 of the present utility model.

Reference numerals in FIGS. 1 to 7 include:

1—Heat Dissipation Main Body 2—Fixed Substrate 3—Inner Concave Step

4—Ribs 5—Air inlet 6—Central axis

7—Wind deflector 8—Incline baffle 9—Power cord through hole

10—LED light board 11—lens 12—PC lampshade

13—circular compression ring 14—fixed plate 15—bolt clamp

16—air outlet 17—fan impeller.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the implementation modes are not limitations of the utility model. Referring to Fig. 1 to Fig. 7, the utility model will be described in detail below in conjunction with the accompanying drawings.

Embodiment one.

Referring to Fig. 1 to Fig. 5, a kind of heat sink provided by the present invention includes a hollow heat dissipation main body 1, the lower end of the heat dissipation main body 1 is provided with a fixed base plate 2 for fixing the light source, and the fixed base plate 2 is provided with There are several air inlets 5 for air convection to enter; the center of the inner cavity of the heat dissipation body 1 is provided with a central axis 6, the lower end of the central axis 6 is fixedly connected with the fixed substrate 2, and the upper end of the central axis 6 is sleeved with a The air deflector 7 is provided with several air outlets 16 for air convection, the air inlet 5 and the air outlet 16 form an air convection channel, and the air deflector 7 rotates under the action of air convection. In the present utility model, an annular inner concave step 3 is arranged between the outer edge of the fixed substrate 2 and the heat dissipation body 1, and several high and low ribs 4 are stamped and formed on the inner concave step 3. The low ribs The air inlet 16 is formed between the high ribs. Wherein, the wind deflector 7 includes a base plate, a bearing is arranged between the center of the base plate and the central shaft 6 , and the wind deflector 7 is sleeved on the central shaft 6 through the bearing.

During the working process of the LED lamp with the heat sink, the heat emitted by the LED chip when it emits light is directly transferred to the fixed substrate 2, and the air inside the heat dissipation body 1 is heated by the fixed substrate 2, and the hot air rises. The utility model Utilizing the principle of air thermal convection, the air deflector 7 can be pushed, and the air deflector 7 automatically rotates under the action of the hot air flow, thereby accelerating the convection of internal and external air. Especially in this utility model, a bearing (not shown in the figure) is arranged between the center of the wind deflector 7 and the central shaft 6. The bearing has the advantages of low friction and easy starting. The air deflector 7 surrounds the central axis 6 through the bearing, and does not need to be driven by electricity to also play the role of a fan, so as to realize forced convection heat dissipation for the LED lamps and enhance the heat dissipation effect of the heat sink. Not only the structure is simpler and more compact, but also the This radiator is suitable for high-power LED lamps and has a wider application range.

Further, the base plate is provided with the plurality of air outlets 16 in a ring shape, and the hot air flows to the air outlets after rising; the base plate is extended and connected with a slope baffle at a certain angle with the base plate at the air outlet 16. plate 8. Preferably, the inclination angle between the slope baffle plate 8 and the base plate is between 15° and 20°. The inclined-plane baffle 8 is convenient for internal hot air to flow to the narrow and small air outlet 16. According to the reaction principle of force, the hot air coming out from the air outlet 16 produces a thrust to the inclined-plane baffle 8, so that the wind deflector 7 is easier to rotate.

In the present utility model, the heat dissipation body 1 is a frustum-shaped heat dissipation shell, and the heat dissipation shell and the fixed substrate 2 are both formed by stretching and stamping an aluminum plate; the heat dissipation body 1 and the fixed substrate 2 are integrally formed, Its structure is simple and convenient for production. Several screw through holes and a power line through hole 9 are also provided on the fixed base plate 2 . When installing the LED light source to the heat sink, the LED light source can be directly fixed on the fixed base plate 2 with screws; the power line passes through the power line through hole 9 to supply power to the LED light source, and the installation is simple.

In the present invention, the upper end of the central axis 6 is higher than the top surface of the heat dissipation body 1, and the part of the central axis 6 higher than the top surface of the heat dissipation body 1 is a connecting shaft section for fixing the entire lamp. When the LED lamp with the heat sink needs to be fixed at a certain position, for example, when it is installed on a light pole, it only needs to be fixed with the connecting shaft section of the central axis 6, and the connection is simple and convenient.

In the present utility model, the central shaft 6 is a hollow cylinder, and a threading hole (not shown in the figure) is provided on the side wall of the hollow cylinder for the power supply wire to penetrate into the heat dissipation main body 1 . The driving power supply of the LED lamp can be installed in the inner cavity of the heat dissipation main body 1, and the power cord enters the inner cavity of the heat dissipation main body 1 through the threading hole and is electrically connected with the driving power supply, which can effectively reduce the volume of the assembled LED lamp.

As shown in Fig. 4 and Fig. 5, a kind of LED lamp with said heat sink provided by the utility model includes an LED lamp board 10 welded with several LED chips, a lens 11, a PC lampshade 12, and a circular pressing ring 13 As well as the heat sink, the LED lamp board 10 is fixed and installed under the fixed substrate 2 of the heat sink by screws, and the circular pressing ring 13 fixes the PC lampshade 12 and the lens 11 in sequence from bottom to top. Below the LED lamp board 10. The fixed base plate 2 in the utility model is concave and circular. When installing and using, the LED light board 10 is directly fixed on the fixed base plate 2 by screws, and the heat generated by the LED chip is directly transmitted to the fixed base plate 2, and then the heat dissipation body 1 Dissipate heat quickly, so that the LED lamp has good heat dissipation performance. The PC lampshade 12 and the lens 11 are pressed and installed under the LED lamp board 10 by the circular pressing ring 13. The structure is simple, and the installation is fast and convenient; since the LED lamp board 10 is generally provided with dozens of LED chips, The working brightness is relatively high, and after the light passes through the lens 11 and the PC lampshade 12 in sequence, the emitted light becomes soft and not dazzling.

Further, a hoisting seat is provided above the radiator 1 , and the hoisting seat includes a fixed plate 14 welded to the upper end surface of the central shaft 6 and at least two groups of movable bolt clips 15 . When the LED lamp is installed, it is fixed on the light pole through the hoisting seat; specifically, there is an installation space for the light pole to pass between the bolt clamp piece 15 and the fixing plate 14. After the light pole is inserted into the installation space, the Use a tool to twist the bolts of the bolt clamp part 15 to lock the light pole on the hoisting seat. The installation is convenient and fast, and it is not easy to loosen, and has a high safety factor.

Embodiment two.

The structure of the LED lamps described in the second embodiment is basically similar to that of the LED lamps described in the first embodiment, and will not be repeated here; the difference with respect to the first embodiment is that the fixed substrate 2 is protruding upwards The rotary cone-shaped fixed base plate is integrally formed with the heat dissipation main body 1. Specifically, the rotary cone-shaped fixed base plate and the heat dissipation main body 1 are stamped and stretched from the same plate, which is simple to process and easy to install; Several circular air inlets 5 are arranged in an annular array on the inclined surface of the truncated truncated rotary base plate. As shown in Figure 6, the center of the fixed base plate of the rotary cone table is the fixed installation part of the LED lamp board 10, which is more suitable for the low-power LED lamp board 10; the heat of the LED lamp board 10 is directly transferred to the rotary cone table The surface temperature of the fixed substrate and the rotary cone-type fixed substrate is relatively high, the high-temperature airflow in the inner cavity of the heat dissipation body 1 rises, and the external low-temperature airflow of the heat dissipation body 1 flows in from the circular air inlet 5, and the LED lamps are also forced Convection heat dissipation enhances the heat dissipation effect of the radiator. The radiator of the second embodiment not only has a simpler and more compact structure, but also makes the radiator suitable for high-power LED lamps.

Embodiment three.

The structure of the third embodiment is basically the same as that of the first and second embodiments, and will not be repeated here. As shown in Figure 7, the only difference between the third embodiment and the first two embodiments is: the wind deflector 7 is set as the fan impeller 17, and a collar is arranged in the middle of the fan impeller 17, and the bearing is located between the collar and the central shaft 6. The fan impeller 17 is installed on the top of the heat dissipation body 1. When the LED light fixture is fixed, the fan impeller 17 is more easily affected by the external dynamic air flow. When the fan impeller 17 rotates, the inside of the heat dissipation body 1 will The hot gas is blown out, and the fixed base plate 2 is provided with several air inlets 5, so that the fan impeller 17 performs forced convection heat dissipation on the LED lamps, so that the heat sink has a very good heat dissipation effect.

The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and scope of application. The content of this specification should not be understood as Limitations on the Invention.

Claims (10)

1. a radiator, includes the heat sink body of hollow, and the lower end of described heat sink body is provided with the fixing base for fixed light source, it is characterized in that: described fixing base is provided with some air inlets entered for cross-ventilation; The lumen centers of described heat sink body is provided with central shaft, the lower end of described central shaft is fixedly connected with fixing base, wind deflector is arranged with in the upper end of central shaft, this wind deflector is provided with some for cross-ventilated air outlet, this air inlet and air outlet form air convection channel, and wind deflector rotates under cross-ventilated effect.

2. a kind of radiator according to claim 1, it is characterized in that: the indent step being provided with annular between the outer edge of described fixing base and heat sink body, be formed with several height rib straggly in indent step upper punch pressure, between low rib and high rib, form described air inlet.

3. a kind of radiator according to claim 1, is characterized in that: described fixing base is the revolution frustum type fixing base raised up, this revolution frustum type fixing base and heat sink body one-body molded; On the inclined-plane of described revolution frustum type fixing base, annular array is provided with the air inlet of several circles.

4. a kind of radiator according to claim 1, is characterized in that: described wind deflector comprises a baseplate part, be provided with bearing between the Center-to-Center axle of this baseplate part, described wind deflector is located on central shaft by this bearing holder (housing, cover).

5. a kind of radiator according to claim 4, is characterized in that: described baseplate part is provided with ringwise described some air outlets, and at air outlet place, extension is connected with and baseplate part inclined plate baffle at an angle described baseplate part.

6. a kind of radiator according to claim 5, is characterized in that: the angle of inclination between described inclined plate baffle and baseplate part is between 15 ° to 20 °.

7. a kind of radiator according to claim 4, is characterized in that: described wind deflector is set to blast fan, the centre of blast fan is provided with the collar, and described bearing is between the collar and central shaft.

8. a kind of radiator according to claim 1, is characterized in that: described central shaft is hollow cylinder, is provided with power supply source line penetrates through wires hole in heat sink body at the sidewall of hollow cylinder.

9. one kind has the LED lamp of radiator described in any one in claim 1 to 8, it is characterized in that: comprise the LED lamp panel, lens, PC lampshade, circular hold-down ring and the described radiator that are welded with some LED chip, described LED lamp panel is fixedly installed in below the fixing base of radiator by screw, and PC lampshade and lens are sequentially fixedly installed in the below of LED lamp panel by described circular hold-down ring from the bottom up.

10. described a kind of LED lamp with described radiator according to claim 9, it is characterized in that: the top of described radiator is provided with lifting seat, described lifting seat comprises the bolt card cuffs of fixed head and at least two group activities being welded in central shaft upper surface.