Radiator and LED lighting device thereof

Abstract

The utility model relates to a radiator and an LED lighting device thereof. The radiator and the LED lighting device thereof provided by the utility model comprise a closed flow channel, wherein the closed flow channel comprises an upper cover plate, a lower cover plate and more than two radiating holes; the outer side surface of one side of the lower cover plate is a plane; the upper cover plate covers the lower cover plate, a flow channel space of the closed flow channel is formed between the upper cover plate and the lower cover plate, and openings are formed in the positions, at the two ends of the extension direction of the lower cover plate, of the closed flow channel respectively; the heat dissipation holes are oppositely formed in the upper cover plate and the lower cover plate respectively. According to the radiator and the LED lighting device thereof, the inner surface and the outer surface of the closed flow channel can make contact with air and conduct heat exchange, the effective radiating area is enlarged, and heat exchange is accelerated; by means of the chimney effect, after air in the closed flow channel is heated and expanded, the air flowing speed is increased through hot pressing, and the convection heat exchange efficiency is improved; and a plurality of heat dissipation holes are formed, so that a flow channel of the chimney effect is shortened, and the phenomena that the temperature difference is not obvious and the chimney effect is reduced due to the fact that the flow channel is too long are avoided.

Description

Technical Field

[0001] The utility model relates to the field of road lighting, in particular to a radiator and an LED lighting device thereof. Background Art

[0002] During the use of existing lighting devices, heat is generated, and the accumulation of heat easily leads to failures. Therefore, a heat dissipation structure is generally provided in the lighting device. For example, as Figure 1 shown, an open radiator used in an existing lighting device includes a heat dissipation plate 1 and a plurality of heat dissipation ribs 2 extending from the heat dissipation plate 1. During use, the side of the heat dissipation plate 1 facing away from the heat dissipation ribs 2 is connected to the lighting device, and heat is transferred from the heat dissipation plate 1 to the heat dissipation ribs 2 and then from the heat dissipation ribs 2 to the air to achieve heat dissipation. The effective heat dissipation area is the surface area of the radiator. However, the heat dissipation area of the existing radiator is limited. To further increase the heat dissipation area, either the overall surface area of the radiator is increased, or the number of heat dissipation ribs is increased. If the overall surface area of the radiator is increased, it is easy to cause an increase in the overall volume of the radiator and an increase in the occupied space. If the number of heat dissipation ribs is increased, the boundary layer of air flow will increase, resulting in a low air flow velocity and a poor heat dissipation problem instead. Summary of the Utility Model

[0003] Based on this, the purpose of the present utility model is to provide a radiator and an LED lighting device thereof.

[0004] A radiator includes a closed channel, and the closed channel includes an upper cover plate, a lower cover plate and more than two heat dissipation holes; one outer side surface of the lower cover plate is a plane; the upper cover plate is covered on the lower cover plate, a channel space of the closed channel is formed between the upper cover plate and the lower cover plate, and openings are respectively provided at both ends of the closed channel in the extending direction of the lower cover plate; the heat dissipation holes are respectively oppositely opened on the upper cover plate and the lower cover plate.

[0005] The radiator of the present utility model adopts a closed channel, and both the inner and outer surfaces can contact the air and perform heat exchange, expanding the effective heat dissipation area and accelerating heat exchange; by using the chimney effect, after the air in the closed channel is heated and expanded, the hot press is used to accelerate the air flow velocity and accelerate the convective heat exchange efficiency. And by providing a plurality of heat dissipation holes, the flow channel of the chimney effect is shortened, avoiding the phenomenon that the temperature difference is not obvious due to too long a flow channel and the chimney effect is reduced.

[0006] Furthermore, the closed channel further includes a plurality of heat dissipation ribs connected between the upper cover plate and the lower cover plate, so as to form a plurality of closed channels arranged side by side.

[0007] Further, the cross-section of the upper cover plate is designed in an arc shape, and its arc surface is located on the side away from the lower cover plate. The upper cover plate is designed in an arc shape, which increases the air flow velocity flowing horizontally through the top of the arc, accelerates heat exchange, and at the same time helps dust, leaves and other objects to slide freely under the action of gravity, wind and rain, avoiding accumulation and affecting heat dissipation.

[0008] Further, it further includes a wire groove, which is located in one of the closed channels and close to the lower cover plate, and the wire groove extends along the extending direction of the closed channel, and openings are provided on both sides thereof. The wire groove is used for connecting wires.

[0009] Further, a module outlet is provided on the lower cover plate.

[0010] Further, a plurality of module outlets are provided on the lower cover plate, and the module outlets are arranged in a straight line along the extending direction of the closed channel; in the extending direction of the closed channel, the module outlets and the heat dissipation holes are arranged in a staggered manner.

[0011] Further, a waterproof lock is provided at the opening of the wire groove, and the waterproof joint includes a waterproof joint body, a nut and a clamping ring; the waterproof joint body is a hollow cylindrical structure with an external thread, and a self-fixing washer is sleeved on its outer side, and one side is threadedly connected to one side opening of the wire groove, and the nut covers the other side thereof; the clamping ring is arranged inside the waterproof joint body near the nut side, and when the nut is screwed inwards, the clamping ring clamps, and when the nut is unscrewed outwards, the clamping ring loosens.

[0012] Further, a breather valve is provided at the opening of the wire groove away from the waterproof lock, and the breather valve includes a threaded post, a valve cap and a waterproof breathable membrane. The threaded post has openings at both ends, is hollow inside and has an external thread, and is threadedly connected to the side of the wire groove away from the waterproof joint. The valve cap is provided with openings at both ends and is communicated with the inside of the threaded post, and the waterproof breathable membrane is arranged at the connection between the valve cap and the threaded post and has the same diameter as the inside of the valve cap.

[0013] The present utility model also provides an LED lighting device, including the radiator as described in any one of the above and an LED lamp module and a connector; the LED lamp module is arranged on the lower cover plate of the radiator; the connector is fixed to the radiator and is used for connecting the radiator with other devices.

[0014] Further, the connector is hinged to the radiator through an arc-shaped chute.

[0015] For better understanding and implementation, the present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0016] Figure 1 It is a structural diagram of an existing radiator;

[0017] Figure 2 It is a schematic diagram of the radiator in the present utility model;

[0018] Figure 3 It is a front view of the radiator in the present utility model;

[0019] Figure 4 It is a side view of the radiator in the present utility model;

[0020] Figure 5 It is a schematic diagram of the radiator with a waterproof wire head in the present utility model;

[0021] Figure 6 It is a schematic diagram of the waterproof wire head in the present utility model;

[0022] Figure 7 It is an exploded view of the waterproof joint in the present utility model;

[0023] Figure 8 It is a schematic diagram of the radiator with a breather valve in the present utility model;

[0024] Figure 9 It is a cross-sectional view of the breather valve in the present utility model;

[0025] Figure 10 It is an overall schematic diagram of the LED lighting device in an embodiment of the present utility model;

[0026] Figure 11 It is an overall schematic diagram of the LED lighting device from another perspective direction in an embodiment of the present utility model;

[0027] Figure 12 It is a schematic diagram of the LED lighting device in another embodiment of the present utility model. Detailed implementation manners

[0028] Please refer to Figures 2 to 12 , the LED lighting device of the present utility model includes a radiator 10, an LED lamp module 20 and a connector 30. The radiator 10 is connected to the LED lamp module 20; the connector 30 is connected to the radiator 10.

[0029] The radiator 10 includes a closed flow channel 11, a wire groove 12, a waterproof joint 13 and a breather valve 14. The wire groove 12 is arranged in the closed flow channel 11; the waterproof joint 13 is arranged at the opening of the wire groove 12, and the breather valve is arranged at the other opening of the wire groove 14.

[0030] The enclosed flow channel 11 includes an upper cover plate 111, a lower cover plate 112, a plurality of heat dissipation holes 113 and a plurality of module wire outlets 114. One outer side surface of the lower cover plate 112 is a flat surface for mounting the LED lamp module 20. The upper cover plate 111 is covered on the side of the lower cover plate 112 facing away from the LED lamp module 20. A flow channel space of the enclosed flow channel 11 is formed between the upper cover plate 111 and the lower cover plate 112, and openings are respectively provided at both ends of the enclosed flow channel 11 in the extending direction of the lower cover plate 112. The plurality of heat dissipation holes 113 are respectively oppositely opened on the upper cover plate 111 and the lower cover plate 112. Preferably, along the projection of the outer side surface of the lower cover plate 112, the extending direction of the heat dissipation holes 113 is perpendicular to the extending direction of the enclosed flow channel 11. Further, the cross-section of the upper cover plate 111 adopts an arc design, and its arc surface is located on the side away from the lower cover plate 112, being high in the middle and low at both sides, with a smooth transition, small wind resistance, the air flow velocity flowing horizontally through the top of the arc is increased, and heat exchange is accelerated. At the same time, it helps dust, leaves and other objects to freely slide down under the action of gravity, wind and rain, avoiding accumulation and affecting heat dissipation. The plurality of module wire outlets 114 are arranged on the lower cover plate 112 and arranged in a straight line along the extending direction of the enclosed flow channel 11; in the extending direction of the enclosed flow channel 11, the module wire outlets 114 and the heat dissipation holes 113 are staggered.

[0031] Both the inner and outer surfaces of the enclosed flow channel 11 can be in contact with air and conduct heat exchange, expanding the effective heat dissipation area and accelerating heat exchange. Among them, according to the thermodynamic principle, the heat dissipation holes 113 on the lower cover plate 112 are used for air intake, and the heat dissipation holes 113 on the upper cover plate 111 are used for air outlet. Utilizing the chimney effect, after the air in the enclosed flow channel 11 is heated and expanded, the air flow velocity is accelerated by using the thermal pressure, and the convective heat exchange efficiency is accelerated. And by providing a plurality of heat dissipation holes 113, the flow channel of the chimney effect is shortened. The air enters from the heat dissipation holes 113 of the lower cover plate 112 and flows out from the heat dissipation holes 113 of the upper cover plate 111, avoiding the phenomenon that the temperature difference is not obvious due to the too long flow channel and the chimney effect is reduced.

[0032] Preferably, the enclosed flow channel 11 further includes a plurality of heat dissipation ribs 115 connected between the upper cover plate 111 and the lower cover plate 112. A plurality of enclosed flow channels 11 arranged side by side are formed between the plurality of heat dissipation ribs 115, which helps the air in the flow channel to flow quickly.

[0033] The wire groove 12 is located within one of the closed channels 11 and is close to the lower cover plate 112. The wire groove 12 extends along the extending direction of the closed channel 11 and has openings on both sides thereof; the wire groove 12 communicates with the module wire outlet 114; the wire groove 12 is used for connecting wires, and the wires of the LED lamp module 20 pass through the module wire outlet 114, are connected along the wire groove 12 to its opening and then connected outside the radiator 10. The wires are in the form of single-core wire harnesses, PCBs, conductors, etc.

[0034] The waterproof joint 13 includes a waterproof joint body 131, a nut 132 and a clamping ring 133. The waterproof joint body 131 is a hollow cylindrical structure with external threads, and a self-fixing washer 1311 is sleeved outside it. One side of the waterproof joint body 131 is threadedly connected to one side opening of the wire groove 12, and the nut 132 covers the other side thereof. Preferably, the outer diameters of both sides of the waterproof joint body 131 are not equal, and the threads on the side with the smaller outer diameter are used for threaded connection with the wire groove 12; the nut 132 is arranged on the threads on the side with the larger outer diameter, and the clamping ring 133 is arranged inside the waterproof joint body 131 near the side of the nut 132. The outer diameter of the clamping ring 133 is larger than the inner diameter of the nut 132. When the nut 132 is screwed inwards, the clamping ring is squeezed and clamped. When the nut 132 is screwed outwards, the clamping ring is loosened. The waterproof joint 13 is used for connecting wires. The wires are led out from the nut 132, and the fixation of the wires is achieved by screwing the nut 132 tightly, protecting the wire harness and the lamp body from sealing and waterproofing, reducing the cost of using waterproof wire harnesses for individual connection of each LED lamp module 20, and at the same time reducing the sealing links that each LED lamp module 20 needs to be individually waterproofed, and reducing the risk of poor sealing.

[0035] The breather valve 14 includes a threaded post 141, a valve cap 142 and a waterproof breathable membrane 143. The threaded post 141 has openings at both ends, is hollow inside and has external threads, and is threadedly connected to the side of the wire groove 141 away from the waterproof joint 13. The valve cap 142 is provided with openings at both ends and is in communication with the inside of the threaded post 141. The waterproof breathable membrane 143 is arranged at the connection between the valve cap 142 and the threaded post 143 and has the same diameter as the inside of the valve cap 142. The micropore diameter of the waterproof breathable membrane 143 is between 0.1 - 10 μm, and gas can pass through while water cannot pass through. And under the action of the surface tension of the thin film material of the waterproof breathable membrane 143, water vapor condenses into small water droplets to form larger water beads on the surface of the waterproof breathable membrane 143, which can effectively prevent the wetting and capillary penetration of liquid water and has good waterproof and breathable performance, and is used to balance the pressure inside and outside the radiator 10 to avoid the LED lighting device being affected by the pressure change caused by thermal shock.

[0036] A plurality of LED lamp modules 20 are arranged on the lower cover plate 112 of the radiator 10, and a wire led out from one module outlet 114 is connected to one LED lamp module 20. The LED lamp module 20 includes an LED lamp and a glass cover. The LED lamp is arranged on the lower cover plate 112, and the glass cover is covered on the LED lamp to cover the LED lamp. The glass cover is an integrated lens with a sealing strip. The light emitted by the LED lamp penetrates the glass cover, and the sealing strip ensures the sealing between the LED lamp module 20 and the wire; there is a gap for the heat dissipation holes 113 between adjacent glass covers, which does not affect the air intake of the heat dissipation holes 113.

[0037] In one embodiment, the connecting member 30 is a housing, one side of which is connected to the side of the radiator 10 where the waterproof joint 13 is provided. A lamp installation sleeve 31 is arranged on the side of the connecting member 30 away from the radiator 10. The lamp installation sleeve 31 is used to be sleeved on the street lamp pole and fixed to fasten the lamp on the pole; the wire passes through the lamp installation sleeve 31 and enters the wire groove 12 through the waterproof joint 13.

[0038] In another embodiment, the connecting member 30 is in a U shape, and arc-shaped grooves 32 are formed on both sides. The radiator 10 is hinged to the arc-shaped grooves 32, and the radiator 10 can slide relative to the arc-shaped grooves 32 to adjust its angle. Threaded holes 33 are formed on the bottom edge of the connecting member 30 for fixing the connecting member 30 to other devices.

[0039] For the LED lighting device of the present utility model, after the LED lamp module 20 is installed on the radiator and the wires are connected, each LED lamp module is provided with a single layer of glass cover. The glass cover is an integrated lens with a sealing strip. The light emitted by the LED lamp penetrates the glass cover, and at the same time the sealing strip ensures the sealing between the LED lamp module 20 and the wire, preventing water or dust from entering. The LED lighting device is fixed at the use position through the connecting member 30, and the LED lamp module 20 is placed downward. The LED lamp module 20 irradiates downward to illuminate the road surface. The top surface of the radiator is designed in an arc shape, high in the middle and low on both sides, with a smooth transition, small wind resistance, and the air flow velocity flowing horizontally through the top surface of the radiator is increased, accelerating heat exchange. At the same time, it helps dust, leaves and other objects to freely slide down under the action of gravity, wind force and rain, avoiding accumulation and affecting heat dissipation.

[0040] The radiator 10 and its LED lighting device according to the present utility model optimize the heat dissipation flow path, change the traditional open flow path into a closed flow path 11, reduce the number of heat dissipation ribs 115, and increase the spacing between the heat dissipation ribs 115 to reduce the boundary layer resistance during air flow and help the air in the closed flow path 11 flow quickly; both the inner and outer surfaces of the radiator 10 can come into contact with air and conduct heat exchange, expanding the effective heat dissipation area and accelerating heat transfer; at the same time, with the help of the chimney effect of the flow path, the air flow speed is accelerated and the convective heat transfer efficiency is accelerated; the top surface of the radiator 10 has a streamlined design, high in the middle and low on both sides, with a smooth transition, highlighting thinness and lightness, small wind resistance, and the arc at the top helps to increase the air flow speed flowing horizontally, accelerate heat transfer, and helps dust, leaves and other objects slide freely under the action of gravity, wind and rain, avoiding accumulation and affecting heat dissipation; this radiator 10 is designed with a sealed wire groove 12, which can provide wiring space for the connection between LED modules 20; at the same time, it has functions such as waterproofing and air permeability to balance the pressure inside and outside the lamp body, saving the cost of using waterproof wire harnesses, reducing the sealing link at the same time, reducing the risk of poor sealing, and avoiding the lamp from being affected by thermal shock and large changes in air pressure differences inside and outside the lamp; the design of the radiator 10 takes into account multi-scenario installation applications, and reserves multiple installation application methods for street lamps, floodlights, tunnel lamps, etc., with strong versatility, convenience and speed.

[0041] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and the present utility model also intends to include these modifications and deformations.

Claims

1. A radiator, characterized in that: The invention comprises a closed flow channel, wherein the closed flow channel comprises an upper cover plate, a lower cover plate and two or more heat dissipation holes; the outer side surface of one side of the lower cover plate is a plane; the upper cover plate is covered on the lower cover plate, and a flow channel space of the closed flow channel is formed between the upper cover plate and the lower cover plate, and the closed flow channel is respectively provided with openings at both ends of the extension direction of the lower cover plate; the heat dissipation holes are respectively arranged on the upper cover plate and the lower cover plate; the closed flow channel also comprises a plurality of heat dissipation ribs connected between the upper cover plate and the lower cover plate, thereby forming a plurality of The closed flow channels are arranged side by side; the spacing between the heat dissipation ribs is large enough to reduce the boundary layer resistance when the air flows; a wire groove is arranged in one of the closed flow channels, the wire groove is close to the lower cover plate, the wire groove extends along the extension direction of the closed flow channel, and openings are provided on both sides; a waterproof joint that can be tightened and loosened is provided at one end of the opening of the wire groove, and a breathable valve is provided at the other end of the opening; a plurality of module outlets are provided on the lower cover plate, and in the extension direction of the closed flow channel, the module outlets and the heat dissipation holes are arranged alternately.

2. The radiator according to claim 1, characterized in that: The cross section of the upper cover plate is designed to be arc-shaped, and the arc surface is located at a side away from the lower cover plate.

3. The radiator according to claim 1, wherein: The waterproof joint includes a waterproof joint body, a nut and a clamping ring; the waterproof joint body is a hollow cylindrical structure with an external thread, a self-fixing washer is sleeved on the outer side thereof, one side of which is threadedly connected to an opening on one side of the wire groove, and the nut covers the other side thereof; the clamping ring is arranged inside the waterproof joint body close to one side of the nut, the outer diameter of the clamping ring is smaller than the inner diameter of the nut, when the nut is tightened inwardly, the clamping ring is squeezed and clamped, and when the nut is unscrewed outwardly, the clamping ring is loosened.

4. The radiator according to claim 1, wherein: The air-permeable valve includes a threaded column, a valve cap and a waterproof breathable membrane. The threaded column is provided with openings at both ends, is hollow inside and is provided with external threads, and is threadedly connected to a side of the wire groove away from the waterproof joint. The valve cap is provided with openings at both ends and is connected to the inside of the threaded column. The waterproof breathable membrane is provided at the connection between the valve cap and the threaded column and has the same diameter as the inside of the valve cap.

5. An LED lighting device, characterized in that: It comprises the radiator, LED lamp module and connector according to any one of claims 1 to 4; the LED lamp module is arranged on the lower cover plate of the radiator; the connector is fixed to the radiator and is used to connect the radiator with other equipment.

6. The LED lighting device according to claim 5, wherein: The connecting piece is hinged to the radiator via an arc-shaped sliding groove.

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