Light source cavity heat dissipation structure of lamp

Abstract

The utility model relates to the technical field of lighting equipment, in particular to a light source cavity heat dissipation structure of a lamp, which comprises a power supply cavity shell, a light source cavity shell and a light source plate, the power supply cavity shell and the light source cavity shell are mounted together up and down, and the light source plate is arranged in the light source cavity shell; a heat dissipation piece is arranged on the back face of the light source cavity shell and comprises a first heat dissipation fin, a second heat dissipation fin and a third heat dissipation fin, the heat dissipation outlet direction of the first heat dissipation fin is the vertical direction, and the first heat dissipation fin is arranged in the middle of the back face of the light source cavity shell. The second radiating fins are radially arranged on the two sides of the first radiating fins symmetrically; the third cooling fins are in a radial shape and are symmetrically arranged on the two sides of the second cooling fin, and the direction of the third cooling fins is opposite to that of the second cooling fin. The LED lamp is good in radiating effect, the weight and the size of the radiator of the lamp can be reduced, and the reliability and the easiness in installation of the lamp are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting equipment, in particular to a light source cavity heat dissipation structure of a lamp. Background Art

[0002] Traditional lamps, due to their high heat resistance, have low heat dissipation requirements. However, LED lamps, especially high-power LED lamps, have a lower heat resistance, typically around 120°C. Therefore, to prevent light decay or lamp failure, heat dissipation design is necessary. Currently, high-power LED lamps on the market have poor heat dissipation. To improve heat dissipation, some lamps are often heavier, especially explosion-proof lamps, which are particularly bulky to ensure explosion-proof safety. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the purpose of the present invention is to provide a heat dissipation structure of the light source cavity of a lamp, which not only has a good heat dissipation effect, but also can reduce the weight and size of the radiator of the lamp, improve the reliability and ease of installation of the lamp, and at the same time take into account the structural design of the explosion-proof lamp.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: including a power supply cavity shell, a light source cavity shell and a light source board; the power supply cavity shell and the light source cavity shell are installed together up and down, and the light source board is arranged in the light source cavity shell; a heat sink is provided on the back of the light source cavity shell, and the heat sink includes a first heat sink, a second heat sink and a third heat sink, the heat dissipation outlet direction of the first heat sink is vertical, and is arranged in the middle of the back of the light source cavity shell; the heat dissipation direction of the second heat sink is radial, and is symmetrically arranged on both sides of the first heat sink; the heat dissipation direction of the third heat sink is radial, and is symmetrically arranged on both sides of the second heat sink and the direction is opposite to that of the second heat sink.

[0005] As a preferred solution for the heat dissipation structure of the light source cavity of the lamp described in the present invention, the second heat sink is a plurality of heat sinks arranged at intervals, and the upper and lower ends of each heat sink extend toward the middle; the third heat sink is a plurality of heat sinks arranged at intervals, and the upper and lower ends of each heat sink extend toward the two ends of the light source cavity shell.

[0006] As a preferred solution for the heat dissipation structure of the light source cavity of the lamp described in the utility model, the heat sink height of the heat sink is 52-65 mm, the spacing between two adjacent heat sinks in the second heat sink is 15-25 mm, and the spacing between two adjacent heat sinks in the third heat sink is 15-25 mm.

[0007] As a preferred solution of the heat dissipation structure of the light source cavity of the lamp of the present invention, the thickness of the second heat sink and the third heat sink is 3-5 mm, and the draft angle is 3-5°.

[0008] As a preferred solution of the heat dissipation structure of the light source cavity of the lamp of the present invention, the flatness of the contact between the light source cavity housing and the light source board is set to 0.08-0.12.

[0009] As a preferred solution of the light source cavity heat dissipation structure of the lamp of the present invention, the distance between the power cavity housing and the light source cavity housing is set to 10-18 mm.

[0010] Compared with the existing technology, the beneficial effects of the present invention are: the present invention is a three-dimensional heat-conducting structure, which not only has a good heat dissipation effect, but also can reduce the weight and size of the radiator of the lamp, improve the reliability and ease of installation of the lamp, and at the same time take into account the structural design of the explosion-proof lamp.

[0011] This innovative light source cavity heat dissipation structure, through rational design, material selection, and thermal simulation analysis, is over 30% lighter than the housings of existing explosion-proof lamps with comparable performance, and over 20% lighter than non-explosion-proof lamps. This solution reduces material usage, achieving energy conservation and environmental protection, while also reducing weight and improving installation ease. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0013] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model.

[0014] Figure 2 This is a schematic diagram of the back structure of the light source cavity shell of the utility model.

[0015] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 4 This is a schematic diagram of the light source cavity shell structure of the utility model.

[0017] Reference numerals in the figure: 1, power cavity housing; 2, light source cavity housing; 3, light source board; 21, heat sink; 21-1, first heat sink; 21-2, second heat sink; 21-3, third heat sink. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0019] Example 1

[0020] Reference Figure 1-4 , which is the first embodiment of the utility model, provides a heat dissipation structure of the light source cavity of a lamp, which not only has a good heat dissipation effect, but also can reduce the weight and size of the radiator of the lamp, improve the reliability and ease of installation of the lamp, and at the same time take into account the structural design of the explosion-proof lamp; achieve energy saving and environmental protection; the product is lightweight and the ease of installation of the product is improved.

[0021] Specifically, it includes a power cavity shell 1, a light source cavity shell 2 and a light source board 3; the power cavity shell 1 and the light source cavity shell 2 are installed together in the upper and lower parts, and the light source board 3 is arranged in the light source cavity shell 2; a heat sink 21 is provided on the back of the light source cavity shell 2, and the heat sink 21 includes a first heat sink 21-1, a second heat sink 21-2 and a third heat sink 21-3. The heat outlet direction of the first heat sink 21-1 is vertical and is arranged in the middle of the back of the light source cavity shell 2; the heat dissipation direction of the second heat sink 21-2 is radial and symmetrically arranged on both sides of the first heat sink 21-1; the heat dissipation direction of the third heat sink 21-3 is radial and symmetrically arranged on both sides of the second heat sink 21-2 and in the opposite direction to the second heat sink 21-2. The second heat sink 21-2 is arranged as a plurality of heat sinks at intervals, and the upper and lower ends of each heat sink extend toward the middle; the third heat sink 21-3 is arranged as a plurality of heat sinks at intervals, and the upper and lower ends of each heat sink extend toward the two ends of the light source cavity shell 2. Heat is most concentrated in the center of the light source cavity housing 2, and hot air convection is most easily and efficiently generated from bottom to top. The outlet of the first heat sink 21-1 is oriented vertically, forming a chimney-like convection channel that quickly convects heat from the area of ​​the lamp where the heat is most accumulated into the air. The second and third heat sinks 21-2, 21-3 are arranged in a radial pattern, accommodating both vertical and horizontal convection.

[0022] Preferably, the fin height of the heat sink 21 is 52-65 mm, the spacing between two adjacent fins in the second heat sink 21-2 is 15-25 mm, and the spacing between two adjacent fins in the third heat sink 21-3 is 15-25 mm. The thickness of the second heat sink 21-2 and the third heat sink 21-3 is 3-5 mm, and the draft angle is 3-5°.

[0023] The optimal spacing and height of the heat sinks were determined to be 23 mm and 58 mm after multiple thermal simulation analysis and optimization; the thinnest thickness and minimum draft angle were determined to be 3.5 mm and 3.5° respectively after mold flow analysis, which can not only ensure the heat dissipation effect but also achieve the goals of lightweight, energy saving and environmental protection.

[0024] Preferably, the contact flatness between the light source cavity housing 2 and the light source board 3 is set to 0.08-0.12. The contact plane is finely machined to achieve a flatness of 0.1, which can ensure good contact between the light source 3 board and the light source cavity housing 2 and reduce thermal resistance caused by poor contact.

[0025] Preferably, the distance between the power cavity housing 1 and the light cavity housing 2 is set to 10-18 mm. The specific distance set between the power cavity housing 1 and the light cavity housing 2 allows the light cavity to have heat dissipation space for convection with the air while ensuring the structural integrity of the lamp.

[0026] The heat dissipation structure of the utility model allows sufficient convection heat dissipation between the light source cavity and the air; compared with the traditional heat sink direction of left and right or up and down, the heat dissipation structure of the utility model can carry out rapid convection in 360° directions; if there is wind speed influence, the heat dissipation efficiency will be greatly improved compared with the traditional one-way heat dissipation.

[0027] This innovative light source cavity heat dissipation structure, through rational design, material selection, and thermal simulation analysis, is over 30% lighter than the housings of existing explosion-proof lamps with comparable performance, and over 20% lighter than non-explosion-proof lamps. This solution reduces material usage, achieving energy conservation and environmental protection, while also reducing weight and improving installation ease.

[0028] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may be modified or some or all of the technical features may be replaced with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat dissipation structure for a light source cavity of a lamp, characterized by: The invention comprises a power cavity shell (1), a light source cavity shell (2) and a light source board (3); the power cavity shell (1) and the light source cavity shell (2) are mounted together in an upper and lower manner, and the light source board (3) is arranged in the light source cavity shell (2); a heat dissipation element (21) is arranged on the back of the light source cavity shell (2), and the heat dissipation element (21) comprises a first heat dissipation fin (21-1), a second heat dissipation fin (21-2) and a third heat dissipation fin (21-3); the heat dissipation outlet direction of the first heat dissipation fin (21-1) is vertical, and the heat dissipation outlet direction is arranged in the middle of the back of the light source cavity shell (2); the heat dissipation direction of the second heat dissipation fin (21-2) is radial, and the heat dissipation direction is symmetrically arranged on both sides of the first heat dissipation fin (21-1); the heat dissipation direction of the third heat dissipation fin (21-3) is radial, and the heat dissipation direction is symmetrically arranged on both sides of the second heat dissipation fin (21-2) and the direction is opposite to that of the second heat dissipation fin (21-2).

2. The heat dissipation structure of the light source cavity of the lamp according to claim 1, characterized in that: The second heat sink (21-2) is composed of a plurality of heat sinks arranged at intervals, with the upper and lower ends of each heat sink extending toward the middle of the power cavity housing (1); the third heat sink (21-3) is composed of a plurality of heat sinks arranged at intervals, with the upper and lower ends of each heat sink extending toward the two ends of the light source cavity housing (2).

3. The heat dissipation structure of the light source cavity of the lamp according to claim 2, characterized in that: The fin height of the heat sink (21) is 52-65 mm, the spacing between two adjacent fins in the second heat sink (21-2) is 15-25 mm, and the spacing between two adjacent fins in the third heat sink (21-3) is 15-25 mm.

4. The heat dissipation structure of the light source cavity of the lamp according to claim 3, characterized in that: The thickness of the second heat sink (21-2) and the third heat sink (21-3) is 3-5 mm, and the draft angle is 3-5°.

5. The heat dissipation structure of the light source cavity of the lamp according to claim 4, characterized in that: The contact flatness between the light source cavity housing (2) and the light source plate (3) is set to 0.08-0.

12.

6. The heat dissipation structure of the light source cavity of the lamp according to claim 5, characterized in that: The distance between the power cavity housing (1) and the light source cavity housing (2) is set to 10-18 mm.

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