LED lamp radiator with uniform heat dissipation function

Abstract

The utility model relates to the technical field of radiators, in particular to an LED (light-emitting diode) lamp radiator with a uniform radiating function, which comprises a substrate and radiating columns positioned on one side of the substrate, the substrate comprises a connecting surface and a radiating surface, the connecting surface is connected with an LED lamp in an attached manner, the radiating surface is used for radiating, and the radiating surface is provided with a dome-shaped bulge with an arched middle and a plurality of radiating columns which are vertically distributed. A heat dissipation channel for air convection is formed between every two adjacent heat dissipation columns, the heat dissipation efficiency is improved, the middles of the hump-shaped protrusions are arched, cold air blown downwards by the fan rapidly flows towards the edge through the heat dissipation channels by means of the height difference, the uniform heat dissipation effect is achieved, the heat dissipation efficiency is further improved, the cold air is blown to the hump-shaped protrusions to be dispersed, and the heat dissipation efficiency is improved. And the effect of reducing noise can be achieved. The substrate, the heat dissipation columns, the hump-shaped protrusions, the connecting rings and the containing grooves are integrally formed in an extrusion mode, the production process is simplified, the production cost is saved, contact among all the integrally-formed parts is more uniform, and the heat transfer efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of radiators, in particular to an LED lamp radiator with a uniform heat dissipation function. Background Art

[0002] LEDs are increasingly being used because they are green, environmentally friendly and have a long service life. However, in some high-brightness lighting applications, LEDs are not widely used. The main reason is that high-power LEDs generate a lot of heat and have poor heat dissipation, which can lead to problems such as reduced LED luminous efficiency, fast light decay, and short service life, limiting the use of high-power LEDs. Currently, some heat sinks suitable for LEDs are available on the market.

[0003] For example, a lamp heat sink and an LED lamp using the lamp heat sink (publication number: CN204268429U, publication date: 2015-04-15) include a heat dissipation metal sheet, the heat dissipation metal sheet includes a connection surface that is fitted and connected to an LED light source component and a heat dissipation surface for heat dissipation, a group of heat dissipation metal tubes are vertically distributed on the heat dissipation surface, and a group of positioning columns for fixing a power supply component, a lamp bracket connection part, and a power socket for connecting a power supply are also provided on the heat dissipation surface; the heat dissipation metal sheet, the heat dissipation metal tube, the positioning column, the lamp bracket connection part and the power socket are integrally formed by a cold forging process.

[0004] The radiator sets a group of heat dissipation metal tubes on the heat dissipation surface of the heat dissipation metal sheet, so that air convection heat dissipation channels are formed between adjacent heat dissipation metal tubes to improve heat dissipation efficiency. However, in some LED lamps, the radiator is used with a fan, and the fan blows cold air to the radiator for heat dissipation. How to make the cold air take away the heat of the radiator more evenly in this process is not reflected in this technology. Utility Model Content

[0005] In view of the technical defects existing in the background technology, the utility model proposes an LED lamp heat sink with uniform heat dissipation function, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0006] An LED lamp heat sink with uniform heat dissipation function comprises: a substrate and a heat dissipation column located on one side of the substrate, the substrate comprises a connection surface that is fitted and connected to an LED light source board and a heat dissipation surface for heat dissipation, the heat dissipation surface is provided with a dome-shaped protrusion with a middle arch and a plurality of vertically distributed heat dissipation columns, the connection surface is provided with a connection ring and a placement groove, the placement groove is provided at one end of the connection ring close to the substrate, and the substrate, the heat dissipation column, the dome-shaped protrusion, the connection ring and the placement groove are extruded as a whole.

[0007] As a further technical solution of the utility model, the heat dissipation column is divided into a central heat dissipation column and an edge heat dissipation column. The central heat dissipation column is arranged on the side of the edge heat dissipation column close to the central axis of the substrate, and the central heat dissipation column is arranged on the side of the dome-shaped protrusion away from the substrate.

[0008] As a further technical solution of the utility model, the heat dissipation surface is provided with a plurality of vertically distributed fixing columns, and the fixing columns and the heat dissipation columns are evenly distributed along the central axis of the substrate.

[0009] As a further technical solution of the utility model, the substrate is provided with a power hole for accommodating a power line, and the power hole passes through the substrate from the connection surface to the heat dissipation surface.

[0010] As a further technical solution of the utility model, the base plate, the dome-shaped protrusion, the connecting ring and the placement groove are arranged along the same central axis.

[0011] As a further technical solution of the utility model, an inner wall of one end of the connecting ring away from the base plate is provided with an internal thread.

[0012] As a further technical solution of the utility model, the placement groove is arranged on the inner side of the connecting ring.

[0013] The beneficial effects of the utility model are:

[0014] The utility model improves the heat dissipation efficiency by arranging dome-shaped protrusions and multiple vertically distributed heat dissipation columns on a base plate, forming a heat dissipation channel for air convection between adjacent heat dissipation columns, and the dome-shaped protrusion is arched in the middle, and the height difference is used to make the cold air blown downward by the fan flow quickly to the edge through the heat dissipation channel, thereby achieving the effect of uniform heat dissipation and further improving the heat dissipation efficiency. The cold air is blown onto the dome-shaped protrusion and dispersed, which can achieve the effect of reducing noise.

[0015] The substrate, heat dissipation column, dome-shaped protrusion, connecting ring and placement groove of the utility model are integrally extruded and formed, which simplifies the production process and saves production costs. In addition, the contact between the integrally formed parts of the utility model is more uniform, and the efficiency of heat transfer is higher. In addition, the utility model is provided with a placement groove and a connecting ring on the connecting surface of the substrate, and the light source board of the LED lamp can be directly placed in the placement groove and closely attached to the heat sink, further improving the efficiency of heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a structural diagram of an LED lamp radiator with uniform heat dissipation function.

[0017] Figure 2 The figure is a cross-sectional view of an LED lamp radiator with uniform heat dissipation function.

[0018] Figure 3Another cross-sectional view of an LED lamp heat sink with uniform heat dissipation function.

[0019] Figure 4 A top view of an LED lamp radiator with uniform heat dissipation function.

[0020] Figure 5 A bottom view of an LED lamp radiator with uniform heat dissipation function.

[0021] Among them: base plate 1, connection surface 11, heat dissipation surface 12, power hole 13, heat dissipation column 2, central heat dissipation column 21, edge heat dissipation column 22, dome-shaped protrusion 3, connection ring 4, internal thread 41, placement groove 5, fixing column 6. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1 to 5 The implementation methods of the present invention are described with relevant embodiments, but the implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as the known technology in this technical field and can be known and mastered by the technicians in this technical field.

[0023] The heat sink of LED lamps is very important because LED lamps generate a lot of heat during operation. If the heat cannot be effectively dissipated, the temperature of the LED lamp will rise, which will have a negative impact on the performance and life of the LED lamp. First, high temperature will reduce the photoelectric conversion efficiency of the LED lamp, causing the brightness of the LED lamp to decrease. Secondly, high temperature will also accelerate the aging of the LED lamp chip and shorten the service life. In addition, the heat will also cause thermal expansion of the LED lamp, causing the packaging structure of the LED lamp to be damaged, thus causing lamp failure. Therefore, in order to ensure the normal operation of the LED lamp and extend its service life, effective heat dissipation measures must be taken.

[0024] The utility model provides an LED lamp radiator with uniform heat dissipation function, such as Figure 1 As shown, it includes: a substrate 1 and a heat dissipation column 2 located on one side of the substrate 1, such as Figure 2 and Figure 3 As shown, the substrate 1 includes a connecting surface 13 for fitting and connecting to the LED light source board and a heat dissipation surface 12 for heat dissipation. The heat dissipation surface 12 is provided with a dome-shaped protrusion 3 with a raised middle portion and a plurality of vertically distributed heat dissipation columns 2. The utility model arranges a dome-shaped protrusion 3 and a plurality of vertically distributed heat dissipation columns 2 on the substrate 1, and a heat dissipation channel for air convection is formed between adjacent heat dissipation columns 2, thereby improving the heat dissipation efficiency. The dome-shaped protrusion 3 is arched in the middle portion, and the height difference is utilized to allow the cold air blown downward by the fan to flow quickly to the edge through the heat dissipation channel, thereby achieving the effect of uniform heat dissipation, further improving the heat dissipation efficiency, and the cold air is blown onto the dome-shaped protrusion 3 and dispersed, thereby achieving the effect of reducing noise.

[0025] More specifically, the heat dissipation column 2 forms a number of heat dissipation channels on the heat dissipation surface 12 of the substrate 1, and uses the temperature difference between the heat sink and the surrounding air to form natural convection. However, since the edge area of ​​the heat sink is easier to transfer heat with the air than the central area, this causes the heat sink speed in the central part to be slower than the heat sink speed in the edge area. At the same time, some LED lights use fans for auxiliary heat dissipation. The fan and other external forces force the air to flow to form forced convection, but the fan blows cold air vertically downward, which still does not change the problem that the heat sink speed in the central part of the radiator is slower than the heat sink speed in the edge area. In response to this problem, the utility model designs a dome-shaped protrusion 3. The arch in the middle of the structure creates a height difference between the central area and the edge area, changes the air flow direction, and makes the cold air quickly flow to the edge after reaching the dome-shaped protrusion 3, thereby accelerating the heat dissipation speed in the central area of ​​the radiator and making the heat dissipation performance of the radiator uniform.

[0026] The base plate 1, the heat dissipation column 2, the dome-shaped protrusion 3, the connecting ring 4 and the placement groove 5 are integrally extruded and molded. The integrally molded design makes the radiator structure simpler, reduces the number of parts, reduces the difficulty of assembly, and also improves the reliability and stability of the radiator; it can ensure the close connection between the various parts of the radiator, avoid the thermal resistance problem caused by poor contact at the connection, thereby improving the heat transfer efficiency; it makes the radiator lighter, convenient to carry and install, and can also reduce the installation time and cost; it can reduce the air gap and thermal resistance inside the radiator, thereby improving the heat dissipation performance. The base plate 1, the heat dissipation column 2, the dome-shaped protrusion 3, the connecting ring 4 and the placement groove 5 of the utility model are integrally extruded and molded, which simplifies the production process and saves production costs. In addition, the contact between the integrally molded parts of the utility model is more uniform, and the efficiency of heat transfer is higher.

[0027] The connecting surface 13 is provided with a connecting ring 4 and a placement groove 5. The placement groove 5 is provided at one end of the connecting ring 4 close to the substrate 1. The utility model provides the placement groove 5 and the connecting ring 4 on the connecting surface 13 of the substrate 1. The light source board of the LED lamp can be directly placed in the placement groove 5 and closely attached to the radiator. The utility model provides the placement groove 5 and the connecting ring 4 on the connecting surface 13 of the substrate 1. The light source board of the LED lamp can be directly placed in the placement groove 5 and closely attached to the radiator, thereby further improving the efficiency of heat transfer.

[0028] As one of the preferred embodiments of the present invention, Figure 2 and Figure 4As shown, the heat dissipation column 2 is divided into a central heat dissipation column 21 and an edge heat dissipation column 22. The central heat dissipation column 21 is arranged on the side of the edge heat dissipation column 22 close to the central axis of the substrate 1, and the central heat dissipation column 21 is arranged on the side of the dome-shaped protrusion 3 away from the substrate 1. The heat dissipation column 2 itself has the functions of increasing the heat dissipation surface 12 of the radiator, strengthening the heat conduction between the radiator and the air, improving the heat transfer efficiency, changing the flow state of the air around the radiator, and improving the heat dissipation effect. In this embodiment, the heat dissipation column 2 is divided into a central heat dissipation column 21 and an edge heat dissipation column 22 according to whether it is on the dome-shaped protrusion 3. While retaining the role of the original heat dissipation column 2 in the radiator, the central heat dissipation column 21 cooperates with the dome-shaped protrusion 3 to change the flow direction of the cold air blown down by the upper fan, so that the cold air can flow quickly along the central heat dissipation column 21 to the direction of the edge heat dissipation column 22, thereby quickly dissipating heat and cooling.

[0029] As one of the preferred embodiments of the present invention, Figure 4 As shown, the heat dissipation surface 12 is provided with a plurality of vertically distributed fixing columns 6, and the fixing columns 6 and the heat dissipation columns 2 are evenly distributed along the central axis of the substrate 1. The fixing columns 6 are used to fix the heat sink and the outer shell of the LED lamp. The fixing columns 6 are hollow inside, and screws or other fixing parts are fixed to the fixing columns 6 by passing through the outer shell, so that the heat sink and the outer shell of the LED lamp are fixed together. There are preferably 4 to 8 fixing columns 6. Within this range, the fixing columns 6 can play a better stabilizing effect and do not affect the heat dissipation of the heat dissipation column. It is worth noting that the symmetrical distribution of the fixing columns 6 and the heat dissipation columns 2 can better balance the heat dissipation process of the heat dissipation column 2, so that the heat can be transferred more evenly, which can improve the heat dissipation effect compared with asymmetric heat dissipation. And the symmetrical distribution of the fixing columns 6 and the heat dissipation columns 2 makes the air duct lengths on both sides of the radiator consistent, the air resistance is equal, and the amount of air flowing through each plate group is uniform, thereby achieving uniform heat dissipation and improving the utilization rate of thermal energy.

[0030] As one of the preferred embodiments of the present invention, Figure 4 and Figure 5 The base plate 1, the dome-shaped protrusion 3, the connecting ring 4 and the placement groove 5 are arranged along the same central axis. Similarly, the base plate 1, the dome-shaped protrusion 3, the connecting ring 4 and the placement groove 5 are arranged along the same central axis to make the base plate 1 symmetrically distributed, improve the uniformity of heat dissipation, and thus improve the efficiency of heat dissipation.

[0031] As one of the preferred embodiments of the present invention, Figure 5 As shown, the substrate 1 is provided with a power hole 13 for accommodating a power cord, and the power hole 13 penetrates the substrate 1 from the connection surface 13 to the heat dissipation surface 12. The power cord of the LED light source board in the placement groove 5 can be connected to the power supply through the power hole 13. Such a design can make the light source board and the heat sink fit more closely, and the heat conduction effect is better.

[0032] As one of the preferred embodiments of the present invention, Figure 2 As shown, the inner wall of the end of the connecting ring 4 away from the substrate 1 is provided with an internal thread 41. The utility model is provided with a connecting ring 4 on the connecting surface 13 of the substrate 1, and the connecting ring 4 can be used to connect a lampshade to protect the LED light source. In this embodiment, the inner wall of the connecting ring 4 is provided with an internal thread 41, so that the lampshade and the connecting ring 4 are installed and disassembled through the internal and external threads, which facilitates the disassembly of the LED lamp.

[0033] As one of the preferred embodiments of the present invention, the placement groove 5 is arranged inside the connecting ring 4. In this embodiment, the light source board of the LED lamp is arranged in the placement groove 5, and the connecting ring 4 is arranged outside the light source board for connecting components such as lampshade to protect the light source board.

[0034] In summary, the heat dissipation process of the utility model is as follows: after the chip of the LED lamp is turned on, the heat generated by the chip is transferred to the substrate 1 closely attached thereto through the light source board, and a natural convection heat dissipation channel is generated between the heat dissipation columns 2 on the substrate 1, which transfer heat with the surrounding air to achieve heat dissipation; when the fan is turned on, the cold air blown down by the fan forces the air to flow and produce forced convection. When the cold air blown down by the fan reaches the dome-shaped protrusion 3, it drives the heat to flow rapidly to the edge, thereby achieving uniform heat dissipation and improving heat dissipation efficiency.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An LED lamp radiator with uniform heat dissipation function, comprising: A base plate (1) and a heat dissipation column (2) located on one side of the base plate (1), characterized in that the base plate (1) comprises a connection surface (11) for being bonded to an LED light source board and a heat dissipation surface (12) for dissipating heat, the heat dissipation surface (12) being provided with a dome-shaped protrusion (3) with a central arch and a plurality of heat dissipation columns (2) distributed vertically, the connection surface (11) being provided with a connection ring (4) and a placement groove (5), the placement groove (5) being provided at one end of the connection ring (4) close to the base plate (1), and the base plate (1), the heat dissipation column (2), the dome-shaped protrusion (3), the connection ring (4) and the placement groove (5) being integrally extruded.

2. The LED lamp heat sink with uniform heat dissipation function according to claim 1, characterized in that: The heat dissipation column (2) is divided into a central heat dissipation column (21) and an edge heat dissipation column (22), wherein the central heat dissipation column (21) is arranged on a side of the edge heat dissipation column (22) close to the central axis of the substrate (1), and the central heat dissipation column (21) is arranged on a side of the dome-shaped protrusion (3) away from the substrate (1).

3. The LED lamp heat sink with uniform heat dissipation function according to claim 1, characterized in that: The heat dissipation surface (12) is provided with a plurality of vertically distributed fixing columns (6), and the fixing columns (6) and the heat dissipation columns (2) are evenly distributed along the central axis of the base plate (1).

4. The LED lamp heat sink with uniform heat dissipation function according to claim 1, characterized in that: The substrate (1) is provided with a power hole (13) for accommodating a power line, and the power hole (13) passes through the substrate (1) from the connection surface (11) to the heat dissipation surface (12).

5. The LED lamp heat sink with uniform heat dissipation function according to claim 1, characterized in that: The base plate (1), the dome-shaped protrusion (3), the connecting ring (4) and the placement groove (5) are arranged along the same central axis.

6. The LED lamp heat sink with uniform heat dissipation function according to claim 1, characterized in that: An inner wall of one end of the connecting ring (4) away from the base plate (1) is provided with an internal thread (41).

7. The LED lamp heat sink with uniform heat dissipation function according to claim 1, characterized in that: The placement groove (5) is arranged on the inner side of the connecting ring (4).

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