CN101649965B - Liquid-cooled light distribution hollow type LED lamp - Google Patents

Abstract

The invention discloses a liquid-cooled light distribution hollow LED lamp, which comprises an electrical connector, an LED driver, a lamp holder, an LED light source, a lampshade and a hollow radiator. The lampshade is made of a substantially transparent material, and is characterized in that The cavity between the outer surface of the hollow heat sink and the lampshade is partially or completely filled with heat-conducting and light-distributing liquid, the electrical connector and LED driver are arranged in the built-in hollow chamber of the hollow heat sink, and the LED light source is directly Or, the LED substrate is arranged on the hollow heat dissipation body, and the connecting wire of the LED light source is not in contact with the heat dissipation liquid. The invention has good heat dissipation effect, light weight, environmental protection and durability, simple manufacture and low cost.

Description

Liquid-cooled light distribution hollow LED lamp

technical field

The invention relates to an LED lamp, in particular to an integrated LED lamp which uses liquid for heat dissipation and light distribution.

Background technique

With the development and maturity of high-power LED technology, the performance index of LED for lighting has been greatly improved day by day. At present, the luminous efficiency of industrialized white LEDs has reached (70-90) lm/W, far exceeding the luminous efficiency level of ordinary incandescent lamps. High-power LEDs will be more and more widely used in the field of lighting. It is the fourth-generation lighting source that replaces fluorescent lamps and incandescent lamps in the 21st century.

However, since the LED must be below 80 degrees Celsius to obtain high light efficiency and long life, the thermal design requirements for LED lamps are very high. Poor heat dissipation will cause LED light decay, reducing luminous efficiency and service life. In order to obtain a good heat dissipation effect and replace the current commercial standard light bulb, the patent (CN1605790A LED lamp device and its method) proposes a new LED lighting device (Fig. 1).

The structure of this lighting device includes a power converter that provides the required output voltage and an optical engine with a substrate with high thermal conductivity, a plurality of LED semiconductor devices that are mechanically connected to the substrate, a LED that is fixed on the substrate and surrounds the LED device. At least a portion of the peripheral bank, and a substantially transparent polymeric encapsulant disposed over the plurality of LED devices and bounded by the peripheral bank.

The lighting fixture heat sink is a solid material with suitably high thermal conductivity and suitably rigid to dissipate heat from other components of the LED lighting fixture. For example, various metals of aluminum alloys, copper alloys brass, magnesium alloys, carbon polymers, carbon composites and/or ceramics. The radiator is constructed as a plurality of ribs, thereby increasing the surface area of the radiator to dissipate a large amount of heat. Such a cooling body is heavy, consumes a lot of metal, is complicated to manufacture, and has high cost.

In order to solve the above problems, Chinese patent CN2735548 discloses a high-power LED heat dissipation structure, which includes a housing base 21, a heat dissipation box 24, a circuit substrate 22 and at least one high-power LED 23, and a heat-conducting liquid is sealed in the heat dissipation box 25. Since the heat-conducting liquid sealed inside the heat-dissipating box has good heat-conducting properties, it has smaller thermal resistance than solid metal, and the purpose is to reduce the thermal resistance between the heating element and the heat-dissipating surface. Therefore, a smaller heat dissipation area can be used to obtain a large-area heat dissipation effect. Therefore, this technical solution can solve this problem to a large extent. However, since the heat transfer liquid occupies more internal space, it also increases the weight of the product and the difficulty of installation, reducing the safety of the product, as shown in Figure 2.

In addition, since the metal easily reacts electrochemically with the electrolyte in the cooling liquid at high temperature, it is difficult to choose the cooling liquid, and the sealing problem with the heat sink becomes very strict.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a liquid-cooled light distribution hollow LED lamp technology.

The technical solution adopted by the present invention to solve the technical problems of the existing invention is:

The liquid-cooled light distribution hollow LED lamp includes an electrical connector, an LED driver, a lamp holder, an LED light source, a lampshade, and a hollow radiator. The lampshade is made of a substantially transparent material, and is characterized in that the hollow radiator The cavity between the surface and the lampshade is partially or completely filled with heat-conducting liquid, the electrical connector and the LED driver are arranged in the built-in hollow chamber of the hollow radiator, and the outer shape of the lampshade is similar to that of a commercial standard light bulb. The internal hollow radiator is a cylindrical structure with an open bottom, and the edge of the open end is bonded to the bottom of the lampshade to form a closed structure. The LED light source is directly or through an LED covering the outer surface of the hollow radiator. The substrate is arranged on the top of the hollow radiator.

The hollow heat sink is used as the installation and heat dissipation substrate of the LED light source and is in contact with the heat-conducting liquid, so that the heat emitted by the LED light source is conducted out through the heat-conducting liquid to achieve a good heat dissipation effect. The connecting wires of the LED light source are sealed at the bottom of the LED light source and connected to the built-in hollow chamber of the hollow radiator, so that the connecting wires of the LED light source are not in contact with the heat-conducting liquid.

The hollow radiating body of the present invention can be made of lightweight materials, so that the radiating body is light in weight, environmentally friendly and durable, simple to manufacture and low in cost. More importantly, since the heat-conducting liquid of the present invention is directly filled in the cavity between the outer surface of the hollow heat sink and the lampshade, it will not increase the volume of the product while improving the heat dissipation effect, and basically does not Under the condition of affecting the heat dissipation effect, the weight of the heat-conducting liquid in the original invention is greatly reduced.

According to the present invention, the heat-conducting liquid has a light distribution function, and the effective luminous flux of the LED can be greatly improved through the refraction of the heat-conducting liquid.

According to the present invention, the light distribution design can be carried out on the surface of the lampshade as required. Such as: polishing, reflector, light-transmitting prism, reflective coating, reflective glass and other processes or special structures that are conducive to enhancing the light distribution effect.

According to the present invention, the hollow radiator has a top, which can be connected to the bottom of the LED lamp holder through glue and special positioning objects.

According to the present invention, the heat-conducting liquid can be any solution that is non-freezing, non-corrosive, non-flammable, and non-toxic, such as any one of water, heat-conducting oil, salt water, ethylene glycol solution, or saturated methane solution. kind. The heat transfer liquid can be insulating or non-insulating liquid.

According to the present invention, the hollow heat dissipation cavity is made of plastic, glass, metal, alloy or polymer material, preferably light material.

According to the present invention, the outer surface of the lampshade is a continuous smooth transition surface, such as a smooth surface, a corrugated surface and the like. It can also be a special material with a light distribution function that has been frosted.

According to the present invention, the outer surface of the lampshade may also be a discontinuous surface, such as a bar.

According to the present invention, the outer surface of the lampshade can also be strip-shaped, fan-shaped, circular, square, giant or irregular in artistic expression.

According to the present invention, the light distribution lampshade is made of glass, PMMA, quartz, acrylic and other transparent materials with better light transmission.

According to the present invention, the LED driver can be an isolated driver or a non-isolated driver.

According to the present invention, the LED lamp can be designed and assembled in a modular manner. It is suitable for occasions requiring high-quality light sources such as advertising boxes, street lights, lighting lights, landscape lights, tunnel lights, and spotlights.

According to the present invention, the heat transfer and light distribution liquid can be a conductive liquid or a non-conductive liquid, and can also be a granular liquid colloid and a transparent solid made of macromolecule and nanomaterials.

According to the present invention, the LED driver can be built-in or external.

According to the present invention, the LED light source may be an AC LED without external drive or an LED directly driven by a DC voltage. When the LED light source adopts an AC LED light source, no driver is needed.

According to the present invention, the liquid-cooled light distribution hollow LED lamp. The lampshade and hollow radiator of the LED lamp can be processed with special structure and appearance design according to the needs of art and aesthetics.

According to the present invention, the liquid-cooled light distribution hollow LED lamp. The LED light source can be isolated from the heat-conducting liquid by means of vacuum coating.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Fig. 1 is an isometric schematic diagram of an LED lighting device in the prior art

Fig. 2 is a schematic diagram of a liquid-cooled LED lighting device in the prior art

FIG. 3 is a schematic diagram of a hollow liquid-cooled LED according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram of a hollow liquid-cooled LED according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram of a hollow liquid-cooled LED according to a third embodiment of the present invention.

FIG. 6 is a schematic diagram of a hollow liquid-cooled LED according to a fourth embodiment of the present invention.

FIG. 7 is a schematic diagram of a hollow liquid-cooled LED according to a fifth embodiment of the present invention.

FIG. 8 is a schematic diagram of a hollow liquid-cooled LED according to a sixth embodiment of the present invention.

FIG. 9 is a schematic diagram of a hollow liquid-cooled LED according to a seventh embodiment of the present invention.

Fig. 10 is a schematic diagram of a hollow liquid-cooled LED according to the eighth embodiment of the present invention.

Fig. 11 is a schematic diagram of a hollow liquid-cooled LED according to the ninth embodiment of the present invention.

Fig. 12 is a schematic diagram of a hollow liquid-cooled LED according to the tenth embodiment of the present invention.

specific implementation plan

The first embodiment of the present invention is shown in FIG. 3 . The embodiment of the present invention provides a liquid-cooled light distribution hollow LED lamp, including an electrical connector 1 , an LED driver 2 , a lamp holder 4 , a hollow radiator 6 , an LED light source 8 , a light distribution lampshade 9 , and an LED connection wire 12 . The electrical connector 1 is arranged inside the lamp cap of the LED lamp to connect to the mains, and it is connected to the input of the LED driver 2. The cavity 11 between the hollow radiator 6 and the light distribution lampshade is filled with high-performance heat-conducting The light distribution liquid 5 , the LED driver 2 is arranged in the built-in hollow chamber 10 formed by the hollow radiator 6 , and the LED light source 8 is arranged on the hollow radiator 6 . The connection line 12 of the LED light source 8 is connected to the LED driver 2 in the hollow chamber 10 at the bottom. This solution can effectively avoid the contact between the LED connection line and the light distribution and heat transfer liquid, making the selection of light distribution and heat transfer liquid more economical and efficient. .

The lamp holder 4 described in the embodiment of the present invention is a pin type or a screw type.

The hollow radiator 6 described in the embodiment of the present invention has an open bottom shape, and is connected to the light distribution lampshade 9 through a sealing gasket or glue. The hollow radiator 6 is made of metal, alloy, plastic, glass, quartz or other light environmental protection materials. The surface can be designed according to the light distribution requirements, such as: polishing, reflector, light-transmitting prism, reflective coating, reflective glass and other processes or special structures that are conducive to enhancing the light distribution effect. The hollow radiator lampshade can have a similar shape to a commercial standard light bulb. It should be understood that within the scope of the present invention, almost or substantially any bulb shape can be simulated, and the hollow radiator 6 can be configured in any shape and still fall within the scope of the present invention.

For example, according to different embodiments of the present invention, the hollow radiator 6 and the light distribution lampshade can be configured in various shapes and sizes to facilitate heat dissipation, such as by increasing the surface area of the hollow radiator 6 and the light distribution lampshade 9 .

The heat-conducting and light-distributing liquid 5 described in the embodiment of the present invention is a liquid material with appropriate high thermal conductivity, strong fluidity, slow performance and proper stability, and dissipates heat from other components of the LED lighting device. For example, water, heat transfer oil, brine, ethylene glycol solution, polymer dimethane saturated solution, etc. When selecting a heat transfer liquid, the following factors must be considered: the heat transfer capacity of the heat transfer liquid; the freezing point and viscosity of the heat transfer liquid; the boiling point and decomposition temperature of the heat transfer liquid; the corrosiveness of the heat transfer liquid; the flammability, toxicity, and cost of the heat transfer liquid. The heat transfer liquid can be a conductive liquid or a non-conductive liquid.

The LED light source 8 described in the embodiment of the present invention is closely connected to the outer surface of the top of the hollow heat sink 6 through the heat-conducting insulating film and the heat-conducting insulating tape, the periphery of the bottom of the hollow heat sink 6 is closely connected to the bottom of the light distribution lampshade, and the outer surface of the hollow heat sink 6 The surface is in contact with the heat-conducting liquid 5 to conduct heat through conduction and convection.

The LED light source described in the embodiment of the present invention is placed in the light distribution lampshade 9 at the same time, and the described light distribution lampshade 9 can be a hollow hemispherical body or other shapes with an open end, and its size is the same as that of the hollow radiator 6 and the liquid cooling configuration. The designed size of the light hollow LED lamp head can be adapted. The light distribution lampshade 9 is made of a transparent material, such as glass or PMMA, and the surface is treated with sandblasting, powder spraying, lens, etc. to achieve different luminous effects as required. Different light intensity and illumination area requirements can also be achieved by adjusting the surface curvature of the lampshade.

The LED lamp driver 2 described in the embodiment of the present invention is a switching power supply, which can be connected to a commercial power supply or directly connected to a DC power supply.

The second embodiment of the present invention is shown in FIG. 4 . The embodiment of the present invention provides a liquid-cooled light distribution hollow LED lamp, including an electrical connector 1, an LED driver 2, a lamp holder 4, a hollow radiator 6, a heat dissipation substrate 7, an LED light source 8, a light distribution lampshade 9, and an LED connection Line 12. The electrical connector 1 of the present invention is arranged inside the LED lamp cap to connect to the mains, and it is connected to the input of the LED driver 2. The hollow radiator 6 and the light distribution lampshade 9 are composed of an integrated transparent material , Such as: acrylic, glass, quartz, transparent polymer nanomaterials. The LED light source 8 and its heat dissipation aluminum substrate 7 are enclosed in an integrated heat dissipation lampshade composed of a lampshade 9 and a hollow radiator 6 . This structure can effectively solve the problem of sealing the heat dissipation and light distribution liquid, and at the same time, the integrated structure can make the structure design of the LED relatively simple. The lamp holder 4 is a pin type or a screw type.

In this embodiment, on the basis of the first embodiment, an LED heat dissipation substrate 7 is added, and the shape of the LED aluminum substrate 7 is basically the same as that of the hollow heat dissipation body 6, and it may also be a strip structure and Covering the outer surface of the hollow radiator 6, the rest of the structure is the same as the aforementioned first example.

The third embodiment of the present invention is shown in Figure 5, the liquid-cooled light distribution hollow LED lamp includes an electrical connector 1, an LED driver 2, a lamp holder 4, a hollow heat sink 6, an LED heat dissipation substrate 7, and an LED light source 8 , light distribution lampshade 9 and LED connecting wire 12. The LED aluminum substrate 7 of this design has a main body part and a top plate 15 that are basically the same shape as the hollow radiator 6, and the main body part covers the outer surface of the hollow radiator 6; the LED aluminum substrate 7, hollow radiator The airtight cavity 11 surrounded by the body 6 and the lampshade 9 is filled with a high-performance heat-conducting liquid 5, and the heat-conducting liquid can conduct the heat on the LED substrate through conduction and convection. The cavity 14 formed between the top plate 15 and the top of the lampshade 9 is not filled with heat-conducting liquid, so the LED light source 8 is not immersed in the heat-conducting liquid, so the risk of electrochemical reaction can be effectively avoided. The LED light source 8 is arranged on the hollow radiator 6 . The heat-conducting liquid can be transparent or opaque liquid or granular nanometer and polymer materials. The closed cavity at the top of the LED heat dissipation substrate can also be made of non-metallic transparent material. The LED light source can be composed of single or multiple LEDs.

The rest of the structure of the hollow liquid-cooled LED lighting lamp described in the embodiment of the present invention is the same as that of the aforementioned second example.

The fourth embodiment of the present invention is shown in Figure 6. The embodiment of the present invention provides a liquid-cooled light distribution hollow LED lamp, including a screw-type electrical connector 1, a lamp holder 4, a hollow radiator 6, an AC LED light source 8, a light distribution lampshade9. The LED light source of this solution is an AC LED, so no driver is required. The LED light source 8 is disposed on the hollow radiator 6 , and the hollow radiator 6 is a heat dissipation substrate packaged with the AC LED light source 8 as one. The hollow radiator 6 and the light distribution lampshade 9 form an integrated heat dissipation cavity.

The electrical connector 1 described in the embodiment of the present invention is a screw type, and the rest of the structure is the same as that of the aforementioned first example.

The fifth embodiment of the present invention is shown in Figure 7. The embodiment of the present invention provides a liquid-cooled light distribution hollow LED lamp, an electrical connector 1, a lamp holder 4, a hollow radiator 6, an LED heat dissipation substrate 7, an AC LED light source 8, Light distribution lampshade9. The AC LED light source 8 is arranged on the hollow heat sink 6, and the hollow heat sink 6 and the light distribution lampshade 9 form an integrated heat dissipation cavity. The AC LED light source 8 and the LED heat dissipation substrate 7 are packaged in an integrated heat dissipation cavity, and this design can effectively avoid the sealing problems of the electrochemical reaction and the light distribution and heat transfer liquid.

The rest of the structure of the hollow liquid-cooled LED lighting lamp described in the embodiment of the present invention is the same as that of the aforementioned second example.

The sixth embodiment of the present invention is shown in Figure 8. The embodiment of the present invention provides a liquid-cooled light distribution hollow LED lamp, an electrical connector 1, an LED driver 2, a lamp holder 4, a hollow radiator 6, an LED light source 8, a light distribution lampshade 9, LED connecting wire 12. The designed hollow heat sink 6 and the light distribution lampshade 9 form a closed heat dissipation cavity, and a high-performance heat transfer liquid 5 is installed in the heat transfer liquid 5. The heat transfer liquid 5 can conduct the heat on the LED substrate 7 through conduction and convection. The LED light source 8 is not immersed in the heat-conducting liquid, so the risk of electrochemical reaction can be effectively avoided. The LED light source 8 is arranged on the hollow radiator 6, and the hollow radiator 6 is a heat dissipation substrate packaged with the LED light source 8 as one. The heat-conducting liquid can be transparent or opaque liquid, and can also be granular nanometer and polymer materials. The top plate 15 of the LED heat dissipation substrate 6 can also be made of non-metallic transparent material. The LED light source can be composed of single or multiple LEDs.

The LED light source 8 described in the embodiment of the present invention is fixed on the hollow heat sink 6, and the hollow heat sink 6 can be an LED heat dissipation substrate packaged with the LED light source as a whole, or can be an independent hollow heat sink.

The top plate 15 of the hollow radiator 6 and the light distribution lampshade 9 form a closed cavity 14, which can avoid the direct contact between the LED light source and the heat-conducting liquid, thereby effectively avoiding the electrochemical reaction.

The LED driver 2 described in the embodiment of the present invention is placed in the built-in hollow chamber 10 of the hollow radiator 6 and connected to the electrical connector 1 through the LED connecting wire 12 .

The rest of the structure of the hollow liquid-cooled LED lighting lamp described in the embodiment of the present invention is the same as that of the aforementioned third example.

Referring to FIG. 9 , the seventh embodiment of the present invention is based on the embodiment in FIG. 4 , and the LED heat dissipation substrate 7 is designed as a flat sheet structure, and covers the top outer surface of the hollow heat dissipation body 6 . The rest of the structure is the same as the embodiment in Fig. 4 .

Referring to FIG. 10 , the eighth embodiment of the present invention is based on the embodiment in FIG. 7 , and the LED heat dissipation substrate 7 is designed as a flat sheet structure, and covers the top outer surface of the hollow heat dissipation body 6 . The rest of the structure is the same as the embodiment in FIG. 7 .

Referring to Fig. 11, the ninth embodiment of the present invention is to make the heat dissipation lampshade 9 and the hollow heat dissipation body 6 into a closed body. The LED light source 8 is fixed on the hollow cooling cavity. The heat dissipation lampshade forms a closed structure with the hollow heat dissipation body through threads and sealants. The rest of the structure is the same as the embodiment in Fig. 5 .

Referring to Fig. 12, the tenth embodiment of the present invention is based on the embodiment in Fig. 3, and the LED light source 8 and the hollow radiator 6 are made into a closed spherical, columnar or other type of structure. The LED heat dissipation substrate 7 may have an irregular structure and cover the top outer surface of the hollow heat dissipation body 6 . The LED light source is a light-emitting diode LED, a high-power LED, or a light-emitting LED array, and the LED heat dissipation substrate can be a ceramic substrate, an aluminum substrate, FR4PCB or a flexible PCB. The rest of the structure is the same as the embodiment in Fig. 3 .

The shape of the plug of the liquid-cooled light distribution hollow LED lamp cap, the hollow heat sink of the LED lamp, the LED lampshade, and the shape of the LED lamp holder provided by the embodiment of the present invention can have many choices according to different application conditions and requirements. Various changes in form and details fall within the protection scope of this patent.

The present invention is mainly used for indoor or outdoor LED lamps of various power levels in homes, offices and public places. It is not only suitable for low-power indoor lighting, but also suitable for outdoor high-power LED lighting occasions, such as LED street lamps and tunnel lights. , spotlights, advertising lights, etc. It is not only environmentally friendly and durable, but also neat and generous, giving people a feeling of comfort and beauty. It has the characteristics of compact structure, reasonable layout, good heat dissipation performance, low cost and light weight. It has the advantages of energy-saving, high-efficiency, environmental protection, health, etc. with exquisite shape. The main body is made of high-quality light plastic, glass, quartz, metal, alloy, etc.

Finally, it should also be noted that what is listed above are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All deformations that can be directly derived or associated by those skilled in the art from the content disclosed in the present invention should be considered as the protection scope of the invention.

It should be understood that: the above-mentioned embodiments are only descriptions of the present invention, rather than limitations of the present invention, and any inventions that do not exceed the spirit of the present invention fall within the protection scope of the present invention.

Claims (8)

1. liquid-cooled light distribution hollow type LED lamp; Comprise electric connector (1), led driver (2), lamp socket (4), led light source (8), lampshade (9) and hollow radiator (6); Described lampshade (9) adopts the material of substantially transparent; It is characterized in that the outer surface and the interior part of the cavity (11) between the lampshade (9) of described hollow radiator (6) or all be filled with heat-conducting liquid (5); Described electric connector (1) and led driver (2) are arranged in the built-in hollow chamber (10) of hollow radiator (6); Described lampshade (9) outer shape is similar with the shape of commercial criterion bulb; Described hollow radiator (6) is the column construction that open the bottom, and the edge of its opening end (13) constitute closing structure with the bottom adhesive of said lampshade (9), and described led light source (8) is arranged on the top of described hollow radiator (6) directly or through the LED substrate (7) that covers said hollow radiator (6) outer surface.

2. liquid-cooled light distribution hollow type LED lamp as claimed in claim 1 is characterized in that described heat-conducting liquid (5) has light distributing function.

3. liquid-cooled light distribution hollow type LED lamp as claimed in claim 1 is characterized in that described heat-conducting liquid (5) is wherein any of water, conduction oil, salt solution, ethylene glycol solution or bismethane saturated solution.

4. liquid-cooled light distribution hollow type LED lamp as claimed in claim 1 is characterized in that described lampshade (9) adopts glass, quartz or macromolecule and nanometer transparent material.

5. liquid-cooled light distribution hollow type LED lamp as claimed in claim 1 is characterized in that described hollow radiator (6) processed by metal, alloy, plastics, glass or quartz material.

6. liquid-cooled light distribution hollow type LED lamp as claimed in claim 1; The hermetically-sealed construction that the lead terminal that it is characterized in that led light source is formed through its support and hollow radiator is connected with the driver in the hollow radiator; The leading-out terminal of LED does not directly contact with heat-conducting liquid, can avoid contacting with the direct of heat-conducting liquid.

7. liquid-cooled light distribution hollow type LED lamp as claimed in claim 1 is characterized in that described led light source is AC LED or direct-current LED, when light source is AC LED, need not external driver.

8. liquid-cooled light distribution hollow type LED lamp as claimed in claim 1 is characterized in that led light source isolates LED and heat-conducting liquid through the mode of vacuum coating.

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