LED lamp with built-in power supply

Abstract

The present invention discloses an LED lamp with a built-in power supply, comprising a lamp body, a driving power supply and a lamp board, the lamp body comprising a shell, a mounting cavity being provided in the shell, a partition being provided in the mounting cavity for dividing the mounting cavity into an upper mounting cavity and a lower mounting cavity, the driving power supply and the lamp board being respectively arranged in the upper mounting cavity and the lower mounting cavity, the driving power supply and the lamp board being spaced apart from the partition so as to form an isolation cavity therebetween; in the LED lamp with a built-in power supply of the present invention, the driving power supply and the lamp board are respectively arranged on both sides of the partition, and the driving power supply and the partition are spaced apart from each other so as to form an isolation cavity therebetween, the driving power supply is arranged overhead so as to prevent heat from the lamp board and the driving power supply from gathering at the partition, thereby avoiding the problem of heat not being able to dissipate.

Description

Technical Field

[0001] The invention relates to the technical field of lighting, in particular to an LED lamp with a built-in power supply. Background Art

[0002] In the context of energy conservation and environmental protection, LED lamps are increasingly used in home and commercial lighting due to their high light efficiency and good focusing performance. LED lamps include a lamp body and a driver power supply. The driver power supply is divided into two solutions: internal and external. When the driver power supply is internal, a lot of heat will be generated. Therefore, generally small and high-power LED lamps will adopt an external driver power supply installation method. The external power supply requires a special installation position, and the assembly relationship between the power box and the lamp body must be ensured during assembly, resulting in a complex overall structure of the lamp, cumbersome assembly process and high assembly cost.

[0003] Although the driving power supply is currently built into the lamp body, due to the high heat generated by the LED lamp, installing the driving power supply in the lamp body is prone to cause the driving power supply to malfunction in a high temperature environment. Therefore, how to reasonably arrange the installation position of the driving power supply and the LED lamp in the lamp body is a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0004] In view of this, the present invention provides an LED lamp with a built-in power supply to solve the above technical problems.

[0005] An LED lamp with a built-in power supply comprises a lamp body, a driving power supply and a lamp board, wherein the lamp body comprises a shell, wherein a mounting cavity is provided in the shell, wherein a partition is provided in the mounting cavity for dividing the mounting cavity into an upper mounting cavity and a lower mounting cavity, wherein the driving power supply and the lamp board are respectively arranged in the upper mounting cavity and the lower mounting cavity, and wherein the driving power supply and the partition are spaced apart from each other to form an isolation cavity therebetween.

[0006] Preferably, the driving power supply includes a main board, and the front side of the main board faces away from the partition.

[0007] Preferably, a heat dissipation module is provided directly above the front side of the mainboard.

[0008] Preferably, the driving power supply also includes a power box, the main board is arranged in the power box, and the power box includes a top cover opposite to the front side of the main board, a bottom plate opposite to the back side of the main board, and a side plate arranged between the top cover and the bottom plate.

[0009] Preferably, the heat dissipation module comprises a heat dissipation seat arranged on the lamp body, and the bottom surface of the heat dissipation seat is in contact with the top cover.

[0010] Preferably, a heat sink is provided on the top surface of the heat sink.

[0011] Preferably, the light board is mounted on the partition.

[0012] Preferably, the upper mounting cavity is provided with a heat-conducting rib which protrudes inward from the inner wall of the shell and abuts against the side plate.

[0013] Preferably, a plurality of the heat-conducting ribs are provided and are arranged at intervals along the length direction of the side plate.

[0014] Preferably, heat dissipation ribs connecting the partition and the shell are provided in the isolation cavity.

[0015] Preferably, an overhead layer is provided between the side of the heat dissipation rib away from the partition and the driving power supply.

[0016] Preferably, the partition and the shell are both made of heat-conducting materials.

[0017] Preferably, the edge of the partition is seamlessly connected to the inner wall of the shell.

[0018] Technical effects of the present invention:

[0019] The LED lamp with built-in power supply of the present invention arranges the driving power supply and the lamp board on both sides of the partition respectively, and arranges the driving power supply and the partition to be spaced apart to form an isolation cavity therebetween. The driving power supply is arranged overhead so that the heat of the lamp board and the driving power supply is not accumulated at the partition, thereby avoiding the problem of heat not being able to dissipate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The embodiments of the present invention are described below in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 It is a schematic diagram of the structure of the LED lamp built into the power supply of this embodiment.

[0022] Figure 2 It is a schematic diagram of the exploded structure of the LED lamp built into the power supply of this embodiment.

[0023] Figure 3 This is a schematic diagram of the exploded structure of the LED lamp built into the power supply of this embodiment from another perspective.

[0024] Figure 4 It is a schematic cross-sectional structure diagram of the LED lamp built into the power supply of this embodiment.

[0025] Figure 5 FIG. 4 is a schematic diagram of the structure inside the lamp housing of this embodiment.

[0026] Figure 6 Schematic diagram of the structure inside the lamp housing (with a driving power supply) of this embodiment. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention are further described in detail below based on the accompanying drawings. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0028] like Figures 1 to 6 As shown, the LED lamp with built-in power supply in this embodiment includes a lamp body 100, a driving power supply 200 and a lamp board 300. The lamp body 100 includes a shell 101, and a mounting cavity 102 is provided in the shell 101. A partition 105 is provided in the mounting cavity 102 to divide it into an upper mounting cavity 103 and a lower mounting cavity 104. The driving power supply 200 and the lamp board 300 are respectively arranged in the upper mounting cavity 103 and the lower mounting cavity 104. The driving power supply 200 and the lamp board 300 are arranged at intervals to form an isolation cavity between the two. The lamp board 300 is provided with an LED chip as a light source, which will generate a lot of heat when it is lit, and many components in the driving power supply 200 will also generate a lot of heat. In this embodiment, due to the provision of an isolation cavity, the heat generated by the driving power supply 200 and the lamp board 300 is not gathered together, thereby avoiding the problem of heat not being able to dissipate.

[0029] In order to prevent the heat dissipation direction of the driving power supply 200 from being directed toward the lamp board 300, the driving power supply 200 includes a main board 201, and the front side of the main board 201 faces away from the partition 105. The main board 201 is used to install components and is a functional module of the driving power supply 200, including components with relatively large heat generation, such as inductors, MOS tubes, transformers, common mode and rectifier diodes, and these components are generally installed on the front side of the main board 201. Therefore, by setting the front side of the main board 201 to face away from the partition 105, the components with relatively high heat generation in the main board 201 can be faced away from the partition 105, and the heat can be dissipated in the reverse direction, thereby further avoiding heat accumulation and improving the heat dissipation effect under the condition of limited volume.

[0030] In order to further guide the heat of the driving power supply 200 away from the light board 300, in this embodiment, a heat dissipation module 400 is provided just above the front of the main board 201.

[0031] In order to better distribute the heat generated by the driving power supply 200, in this embodiment, the driving power supply 200 also includes a power box 202, the mainboard 201 is arranged in the power box 202, and the power box 202 includes a top cover 2021 opposite to the front of the mainboard 201, a bottom plate 2022 opposite to the back of the mainboard 201, and a side plate 2023 arranged between the top cover 2021 and the bottom plate 2022. The power box 202 can be made of high thermal conductivity plastic to reduce the temperature of the internal components. The inner wall of the housing 101 is provided with a radial protrusion to carry the power box 202 for fixing.

[0032] In order to better diffuse the heat, in this embodiment, the heat dissipation module 400 includes a heat sink 401 disposed on the lamp body 100, and the bottom surface of the heat sink 401 is in contact with the top cover 2021. The heat sink 401 is made of heat-conducting material, so that the heat sink 401 can quickly remove the heat accumulated on the top cover of the power box 202. Furthermore, a heat sink 402 is provided on the top surface of the heat sink 401. The heat sink 402 can increase the heat dissipation area and improve the heat dissipation effect. In this embodiment, the heat sink 402 is arranged in a grid pattern, which increases the heat dissipation area, and the holes in the grid provide an upward channel for the drive power supply 200 to dissipate heat.

[0033] In order to quickly dissipate the heat of the lamp board 300 , in this embodiment, the lamp board 300 is mounted on the partition board 105 .

[0034] The driving power supply 200 can also improve the heat dissipation effect by increasing the contact area with the housing 101. In this embodiment, the upper mounting cavity 103 is provided with a heat-conducting rib 1031 protruding inward from the inner wall of the housing 101 and abutting against the side plate 2023. The side plate 2023 is generally in a surrounding form, which can be a plurality of surfaces spliced ​​together or a surrounding arc surface. In this way, it is difficult to fully contact the inner wall of the housing 101. Therefore, by providing a heat-conducting rib 1031 to abut against the side plate 2023, the contact area can be increased. Further, the heat-conducting rib 1031 is provided in plurality, and is arranged at intervals along the length direction of the side plate 2023.

[0035] In order to improve the heat conduction and heat dissipation effect of the partition 105 on the lamp board 300, in this embodiment, the isolation cavity is provided with heat dissipation ribs 107 connecting the partition 105 and the housing 101. The heat dissipation ribs 107 are provided with multiple pieces and are arranged around. The heat dissipation ribs 107 extend radially from the edge to the middle of the partition 105, and the extension length is 1 / 3 to 2 / 3 of the distance from the center of the partition 105 to the edge. The heat dissipation ribs 107 can better export heat to the housing 101.

[0036] In order to avoid heat accumulation, in this embodiment, an overhead layer is provided between the side of the heat dissipation rib 107 away from the partition 105 and the driving power supply 200. The air has a poor heat conduction effect, and the back of the mainboard 201 is suspended to prevent heat from being transferred in this direction.

[0037] In order to improve the heat conduction effect, the partition 105 and the shell 101 are both made of heat conducting materials.

[0038] In order to conduct the heat of the lamp board 300 to the housing 101 as quickly as possible, in this embodiment, the edge of the partition 105 is seamlessly connected to the inner wall of the housing 101. Furthermore, the housing 101 and the partition 105 are integrally formed and manufactured, and the heat conduction and heat dissipation effect is better.

[0039] The specific application of this embodiment is more suitable for track lights. The outer shell of track lights is generally cylindrical. In this embodiment, the shell 101 is a cylinder with openings at both ends. The partition 105 is perpendicular to the central axis of the cylinder. The opening of the upper installation cavity 103 is provided with a heat dissipation module 400 as a lamp cover. The lower installation cavity 104 is also provided with a bracket 700, a focusing lens 500 and a reflective cup 600. The bracket 700 is used to fix the lamp board 300. The top of the shell 101 is also hinged with a rotating seat 800, and the rotating seat 800 cooperates with the track.

[0040] To further improve the heat dissipation effect, in this embodiment, the thickness of the partition 105 is 5 mm to 20 mm to improve the heat storage capacity and to conduct the heat absorbed by the lamp board 300 to the lamp housing 101. The wall thickness of the housing 101 near the lamp board 300 is greater than that at other locations to store energy and dissipate heat.

[0041] In summary, the heat sources of the LED lamp built into the power supply of this embodiment are the driving power supply 200 and the lamp board 300. The driving power supply 200 dissipates heat by contacting the heat dissipation module 400 at the top and contacting the shell 101 at the side or with a very small gap. The bottom is suspended except for positioning. The lamp board 300 dissipates heat by contacting the partition 105, and the two do not affect each other. The top of the heat dissipation module 400 as the cover is in a grid shape, which provides an upward channel for the heat dissipation of the driving power supply 200. The shell 101 is in close contact with the side panels of the driving power supply 200 to increase the heat dissipation area. The wall thickness of the shell 101 is increased in the range of contact with the lamp board 300 to increase heat storage, and a heat sink structure is provided on the reverse side to increase the heat dissipation area.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. An LED lamp with a built-in power supply, comprising a lamp body (100), a driving power supply (200) and a lamp board (300), wherein the lamp body (100) comprises a shell (101), wherein a mounting cavity (102) is provided in the shell (101), wherein a partition (105) is provided in the mounting cavity (102) for dividing the mounting cavity into an upper mounting cavity (103) and a lower mounting cavity (104), wherein the driving power supply (200) and the lamp board (300) are respectively arranged in the upper mounting cavity (103) and the lower mounting cavity (104), wherein: The driving power source (200) and the partition (105) are arranged at an interval so as to form an isolation cavity between the two; the partition (105) and the shell (101) are both made of heat-conducting materials; the lamp board (300) is mounted on the partition (105); the edge of the partition (105) is seamlessly connected to the inner wall of the shell (101); the wall thickness of the shell (101) near the lamp board (300) is greater than the wall thickness of the shell (101) away from the lamp board (300); a heat dissipation rib (107) connecting the partition (105) and the shell (101) is provided in the isolation cavity; and an overhead layer is provided between the side of the heat dissipation rib (107) away from the partition (105) and the driving power source (200).

2. The LED lamp with built-in power supply according to claim 1, characterized in that: The driving power supply (200) comprises a main board (201), and the front side of the main board (201) faces away from the partition (105).

3. The LED lamp with built-in power supply according to claim 2, characterized in that: A heat dissipation module (400) is provided directly above the front surface of the main board (201).

4. The LED lamp with built-in power supply according to claim 3, characterized in that: The driving power supply (200) further comprises a power supply box (202), wherein the main board (201) is arranged in the power supply box (202), and the power supply box (202) comprises a top cover (2021) opposite to the front side of the main board (201), a bottom plate (2022) opposite to the back side of the main board (201), and a side plate (2023) arranged between the top cover (2021) and the bottom plate (2022).

5. The LED lamp with built-in power supply according to claim 4, characterized in that: The heat dissipation module (400) comprises a heat dissipation seat (401) arranged on the lamp body (100), and the bottom surface of the heat dissipation seat (401) is in contact with the top cover (2021).

6. The LED lamp with built-in power supply according to claim 5, characterized in that: The top surface of the heat sink (401) is provided with a heat sink (402).

7. The LED lamp with built-in power supply according to claim 4, characterized in that: The upper mounting cavity (103) is provided with a heat-conducting rib (1031) which protrudes inward from the inner wall of the shell (101) and abuts against the side plate (2023).

8. The LED lamp with built-in power supply according to claim 7, characterized in that: The heat-conducting ribs (1031) are provided in plurality and are arranged at intervals along the length direction of the side plate (2023).

9. The LED lamp with built-in power supply according to any one of claims 1 to 6, characterized in that: The housing (101) is a cylinder with openings at both ends, the partition (105) is perpendicular to the central axis of the cylinder, and the opening of the upper mounting cavity (103) is provided with a heat dissipation module (400) serving as a lamp cover.

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