A double tower heat sink for a spotlight

Abstract

The utility model discloses a double -tower radiator for spotlight, including base, base adopts copper aluminium composite structure, and base includes copper base and aluminium base, two groups of heat dissipation tower body, two groups of heat dissipation tower body symmetry sets up, and heat dissipation tower body includes heat dissipation heat pipe group and heat dissipation fin group, and heat dissipation heat pipe group includes eight heat pipes, and eight heat pipes are installed on copper base and aluminium base, and heat dissipation fin group includes ninety -six aluminium fins, and ninety -six aluminium fins are all set up and install on heat pipe, and copper base surface sets up heat -conducting silicone grease coating, and the silicone grease heat -conducting coefficient of heat -conducting silicone grease coating is greater than or equal to 5W / m K, and with the copper base plate of COB light source forms surface contact, and copper base and aluminium base adopt the connection of press -fit process, the utility model discloses a copper aluminium composite base, sintered heat pipe and the collaborative design of turbulent fin, can reduce the temperature of COB light source base plate to 85 DEG C below, can reduce the light decay rate simultaneously, to satisfy 400W level light source long -term stable work demand.

Description

Technical Field

[0001] This utility model relates to the field of radiator technology, and in particular to a double-tower radiator for spotlights. Background Technology

[0002] A dual-tower heat sink for spotlights refers to a structure in spotlights that uses a double-fin tower structure. Its core function is to solve the heat generation problem of high-power light sources by increasing the heat dissipation area and airflow efficiency.

[0003] The existing stage spotlight heat dissipation system has the following technical problems: 1) Traditional aluminum extrusion heat sinks have insufficient heat capacity. When a 400W COB light source is working, the substrate temperature exceeds 85℃, resulting in severe light decay (>20% / 1000h). 2) A single-tower heat dissipation structure requires a heat sink with an excessively large volume (>200mm in height), which affects the optical design of the lamp. Therefore, we propose a double-tower heat sink for spotlights. Utility Model Content

[0004] In view of the problems mentioned above regarding the insufficient heat capacity of existing spotlights, which leads to severe light decay, and the need for excessively large heat sinks in single-tower heat dissipation structures, which affects the optical design of lamps, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A dual-tower heat sink for spotlights includes a base, the base being a copper-aluminum composite structure, the base comprising a copper base and an aluminum base mounted on the copper base; Two sets of heat dissipation towers are symmetrically arranged. Each heat dissipation tower includes symmetrically distributed heat pipe groups and heat dissipation fin groups. Each heat pipe group includes eight heat pipes, which are installed on the copper base and the aluminum base. Each heat dissipation fin group includes ninety-six aluminum fins, which are all fitted onto the heat pipes to double the heat dissipation area, while optimizing the spatial layout and reducing the overall height requirement.

[0006] As a technical solution for a dual-tower heat sink for a spotlight as described in this utility model, the surface of the copper base is provided with a thermally conductive silicone grease coating. The thermal conductivity of the silicone grease coating is ≥5W / m·K, and it forms surface contact with the copper substrate of the COB light source, so as to ensure that the substrate temperature is controlled below 85°C when the 400W light source is working, and at the same time, the light decay rate can be reduced.

[0007] As a technical solution for a double-tower heat sink for a spotlight as described in this utility model, the copper base and the aluminum base are connected by a pressing process, and the surface roughness Ra of the contact base and the aluminum base is ≤3.2μm, and the interface thermal resistance is ≤0.05℃·in² / W, so as to improve the efficiency of heat conduction.

[0008] As a technical solution for a double-tower heat sink for spotlights according to the present invention, the heat pipe adopts a sintered copper pipe structure, with an operating temperature range of -20℃ to 150℃ and a heat conduction efficiency of ≥120W / cm²·K, so as to meet the requirements of extreme working conditions from -20℃ to 150℃.

[0009] As a technical solution for a double-tower heat sink for a spotlight as described in this utility model, the heat dissipation fins are arranged in an alternating structure, and the adjacent aluminum fins are deflected at an angle of 3°-5° to form a turbulence-enhanced heat dissipation mechanism, so as to extend the air residence time by utilizing the turbulence-enhanced mechanism.

[0010] As a technical solution for a dual-tower heat sink for spotlights according to the present invention, the overall size of the dual-tower heat sink is 66×128×123mm, the spacing of the aluminum fins is 1.2±0.2mm, and the surface area of ​​a single aluminum fin is ≥120cm², so as to achieve the equivalent heat dissipation performance of a 200mm single tower, while avoiding obstruction of the optical path.

[0011] As a technical solution for a dual-tower heat sink for spotlights according to the present invention, it further includes an axial fan installed in conjunction with the heat sink fin assembly. The axial fan and the heat sink fin assembly are spaced 3-5mm apart to increase the airflow speed and the proportion of forced convection cooling at the same noise level.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model, through the synergistic design of copper-aluminum composite base, sintered heat pipe and turbulent fins, can reduce the temperature of COB light source substrate to below 85°C, and at the same time reduce the light decay rate, so as to meet the long-term stable operation requirements of 400W light source.

[0013] 2. This utility model, by setting up symmetrically distributed heat dissipation towers, can achieve the equivalent heat dissipation performance of a single tower of 200mm within a height of 123mm, so as to solve the space conflict problem between traditional heat sinks and optical components, while being compatible with the compact layout requirements of spotlight lens group and reflector cup. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the front view of the present invention.

[0016] Figure 3 This is a top view schematic diagram of the structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the upward-viewing planar structure of this utility model.

[0018] Explanation of reference numerals in the attached figures: In the diagram: 101, copper base; 102, aluminum base; 201, heat pipe; 301, aluminum fins. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0022] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0023] Reference Figures 1-4 A dual-tower heat sink for a spotlight is provided. The dual-tower heat sink for a spotlight includes a base, which adopts a copper-aluminum composite structure. The base includes a copper base 101 and an aluminum base 102 mounted on the copper base 101. The system consists of two symmetrically arranged heat dissipation towers. Each tower includes symmetrically distributed heat pipe groups and heat dissipation fin groups. The heat pipe groups consist of eight heat pipes 201 mounted on a copper base 101 and an aluminum base 102. The heat dissipation fin groups consist of ninety-six aluminum fins 301, all of which are fitted onto the heat pipes 201. In application, the copper-aluminum composite bases (copper base 101 and aluminum base 102) combine the high thermal conductivity of copper with the lightweight advantages of aluminum. The symmetrical dual-tower design doubles the heat dissipation area through the two heat dissipation towers (a total of 8 heat pipes 201 and 96 aluminum fins 301), while optimizing the spatial layout and reducing the overall height requirement.

[0024] Reference Figure 1 and Figure 2 A thermally conductive silicone grease coating (thermal grease type TG-5) is applied to the surface of the copper base 101. The thermal conductivity of the thermally conductive silicone grease coating is ≥5W / m·K, and it forms surface contact with the copper substrate of the COB light source. In application, the thermally conductive silicone grease coating is in direct contact with the surface of the copper substrate of the COB light source, which can reduce the interface thermal resistance and ensure that the substrate temperature is controlled below 85℃ when the 400W light source is working. At the same time, it can reduce the light decay rate.

[0025] Reference Figure 1 and Figure 2The copper base 101 and aluminum base 102 are connected by a pressing process, and the surface roughness Ra of the contact between the copper base 101 and aluminum base 102 is ≤3.2μm (using laser micro-etching technology), the interface thermal resistance is ≤0.05℃·in² / W, the heat pipe 201 adopts a sintered copper tube structure, the working temperature range is -20℃ to 150℃, the thermal conductivity is ≥120W / cm²·K, the eight sintered copper heat pipes 201 are bent in a U-shape, inserted into the pre-drilled holes of the base, and fixed by reflow soldering. In application, the copper-aluminum base pressing process and the sintered heat pipe 201 work together to break through the heat capacity bottleneck of traditional aluminum extruded heat sinks, which can improve the heat conduction efficiency and meet the requirements of extreme working conditions from -20℃ to 150℃.

[0026] Reference Figure 1 , Figure 3 as well as Figure 4 The heat dissipation fins adopt an interlaced arrangement structure, and the adjacent aluminum fins 301 are deflected at an angle of 3°-5° to form a turbulence-enhanced heat dissipation mechanism. The overall size of the dual-tower heatsink is 66×128×123mm, the spacing of the aluminum fins 301 is 1.2±0.2mm, and the surface area of ​​a single aluminum fin 301 is ≥120cm². In application, the interlaced arrangement of the aluminum fins 301 with a deflection of 3°-5° and a spacing of 1.2mm utilizes the turbulence enhancement mechanism to extend the air residence time. Combined with the compact size of 66×128×123mm, it can achieve the equivalent heat dissipation performance of a 200mm single-tower heatsink, while avoiding obstruction of the optical path.

[0027] Reference Figures 1-4 It also includes axial fans (1-2 120×120×25mm axial fans with a speed of 800-2500rpm, for example: dual ball bearing axial fans, model DFB0612, speed 3000±10%rpm) installed in conjunction with the heat sink fin assembly. The axial fans and heat sink fin assembly are kept at a gap of 3-5mm. In application, the axial fans and heat sink body are fitted with a 3-5mm gap to form a directional airflow, which can increase the airflow speed at the same noise level, and at the same time increase the proportion of forced convection cooling.

[0028] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A double-tower radiator for spotlights, characterized in that: include: The base adopts a copper-aluminum composite structure, and the base includes a copper base (101) and an aluminum base (102) mounted on the copper base (101). Two sets of heat dissipation towers are arranged symmetrically. Each heat dissipation tower includes symmetrically distributed heat pipe groups and heat dissipation fin groups. Each heat pipe group includes eight heat pipes (201), which are installed on the copper base (101) and the aluminum base (102). Each heat dissipation fin group includes ninety-six aluminum fins (301), which are all fitted and installed on the heat pipes (201).

2. The double-tower heat sink for a spotlight according to claim 1, characterized in that: The surface of the copper base (101) is provided with a thermally conductive silicone grease coating, the thermal conductivity of the silicone grease coating is ≥5W / m·K, and it forms surface contact with the copper substrate of the COB light source.

3. The double-tower heat sink for a spotlight according to claim 1, characterized in that: The copper base (101) and the aluminum base (102) are connected by a pressing process, and the surface roughness Ra of the contact base (101) and the aluminum base (102) is ≤3.2μm, and the interface thermal resistance is ≤0.05℃·in² / W.

4. The double-tower heat sink for a spotlight according to claim 1, characterized in that: The heat pipe (201) adopts a sintered copper tube structure, with an operating temperature range of -20℃ to 150℃ and a heat transfer efficiency of ≥120W / cm²·K.

5. The double-tower radiator for a spotlight according to claim 1, characterized in that: The heat dissipation fins are arranged in an alternating pattern, and the adjacent aluminum fins (301) are deflected at an angle of 3°-5° to form a turbulence-enhanced heat dissipation mechanism.

6. The double-tower radiator for a spotlight according to any one of claims 1-5, characterized in that: The overall dimensions of the dual-tower radiator are 66×128×123mm, the spacing of the aluminum fins (301) is 1.2±0.2mm, and the surface area of ​​a single aluminum fin (301) is ≥120cm².

7. The double-tower radiator for a spotlight according to any one of claims 1-5, characterized in that: It also includes an axial fan that is installed in conjunction with the heat dissipation fin assembly, and the axial fan and the heat dissipation fin assembly are spaced 3-5mm apart.

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