阅读说明：本技术 用于热沉的系统和方法 (System and method for heat sink ) 是由 D.杨 R.约翰逊 N.克拉斯 于 2018-04-27 设计创作，主要内容包括：实施例可以使用一系列暴露的翅片,其增加了热沉的表面积,从而产生额外的空气流。当较热的空气在系统内上升时,较冷的空气被吸入热沉中。翅片可以暴露在纵轴线的两侧上,从而允许较冷的空气在热沉上方被朝向纵轴线吸入并向上流动。该过程可以冷却翅片。另外,翅片之间的间隔可能必须足够宽以允许空气自由地进入热沉。(Embodiments may use a series of exposed fins that increase the surface area of the heat sink, thereby creating additional air flow. As the warmer air rises within the system, the cooler air is drawn into the heat sink. The fins may be exposed on both sides of the longitudinal axis, allowing cooler air to be drawn over the heat sink toward the longitudinal axis and flow upward. This process may cool the fins. In addition, the spacing between the fins may have to be wide enough to allow air to freely enter the heat sink.)

1. A method for manufacturing a heat sink, comprising:

forming a plurality of fins by pressing a monolithic metal from an upper surface thereof toward a lower surface thereof;

coupling a rail to a base underlying the plurality of fins, wherein the base is formed simultaneously with the fins.

2. The method of claim 1 wherein said extruding occurs over the entire width of said monolithic metal.

3. The method of claim 2, further comprising:

creating at least three exposed surfaces between a first fin of the plurality of fins and a second fin of the plurality of fins.

4. The method of claim 1, wherein the rail is formed of a different material than the monolithic metal.

5. The method of claim 4, wherein the rail is formed of aluminum and the monolithic metal is an aluminum block.

6. The method of claim 1, further comprising:

extruding the entire height of the monolithic metal to create four exposed edges between adjacent fins of the plurality of fins.

7. The method of claim 1, wherein the compressions are evenly spaced.

8. The method of claim 7, wherein the extrusions are spaced 1/3 inches apart from each other.

9. The method of claim 1, further comprising:

coupling a first end of the rail to an exterior sidewall of the base; and also

Positioning a second end of the rail below the base.

10. The method of claim 9, wherein the rail includes angled sidewalls and flat sidewalls.

11. A heat sink, comprising:

a plurality of fins formed by pressing a monolithic metal from an upper surface thereof toward a lower surface thereof, the pressing resulting in a spacing between each of the plurality of fins;

a rail coupled to a base underlying the plurality of fins, wherein the base is formed simultaneously with the fins.

12. The heat sink of claim 11, wherein said extrusion extends across the entire width of said monolithic piece of metal.

13. The heat sink of claim 12, wherein the compression creates at least three exposed surfaces between a first fin of the plurality of fins and a second fin of the plurality of fins.

14. The heat sink of claim 11, wherein the rail is formed of a different material than the monolithic piece of metal.

15. The heat sink of claim 14, wherein the rails are formed of aluminum and the unitary piece of metal is an aluminum block.

16. The heat sink of claim 11, wherein the extrusion extends across the entire height of the monolithic metal to create four exposed edges between adjacent ones of the plurality of fins.

17. The heat sink of claim 11, wherein the extrusions are evenly spaced.

18. The heat sink of claim 17, wherein the extrusions are spaced 1/3 inches apart from each other.

19. The heat sink of claim 11, wherein a first end of the rail is coupled to an exterior sidewall of the base and a second end of the rail is located below the base.

20. The heat sink of claim 19, wherein the rail comprises an angled sidewall and a flat sidewall.

Technical Field

Examples of the present disclosure relate to systems and methods for heat sinks. More particularly, embodiments disclose a heat sink configured to dissipate heat generated by a lamp fixture, wherein the heat sink includes exposed fins that allow for additional airflow.

Background

A greenhouse is a building or complex in which plants grow. For various reasons, including price, it is desirable that greenhouses normally work with as much natural sunlight as possible. To supplement natural light from the sun, high power lamps are used in greenhouses when the sun or other natural light does not provide enough light for optimal plant growth.

However, the cost of operation of high power lamps is higher than with free sunlight. Moreover, conventional high power lamps are larger in size, which blocks free incoming sunlight. Furthermore, the blocking of the incoming sunlight causes shadows on the plants in the greenhouse, which adversely affects the yield of the grower.

Although Light Emitting Diodes (LEDs) are more efficient than conventional high power lamps, they are also more costly to manufacture. In addition, the LEDs cause excessive shadowing as larger fixtures are required to dissipate heat. To avoid the need for large fixtures to dissipate heat, some manufacturers have attempted to build smaller LED fixtures that use active cooling fans. However, in a greenhouse environment, the active cooling fans are quickly clogged with dust, bugs, and the like. This results in the LED fixture with the active cooling fan quickly becoming inoperable.

Conventional LED fixtures that do not include active cooling fans use conventional linear heat sinks. However, conventional linear heat sinks include wings that extend in a direction parallel to the central axis of the conventional LED fixture. Heat generated by conventional LED fixtures can be dissipated based on convection, conduction, or radiation. However, since the LED fixture is suspended, the heat dissipated via conduction is minimal. Radiation is a function of the temperature of the fixture and can be significant, while convection is the primary method of dissipating heat. In use, air particles remove heat from the fixture by air movement. Air movement in the middle of the fixture is minimal for longer heat sinks. This severely limits the amount of power that a conventional LED fixture can consume, as the additional power consumption results in more heat.

Accordingly, there is a need for more efficient and effective systems and methods for heat sinks having exposed fins, allowing for additional air flow.

Disclosure of Invention

Embodiments disclosed herein describe systems and methods for a heat sink within a lamp fixture. In an embodiment, the heat sink may be a passive system that continuously and passively creates a cross-flow thermal management system, thereby dissipating a large amount of heat in a slim lamp fixture.

Drawings

Non-limiting and non-exhaustive embodiments of the present invention are described with reference to the following figures, wherein like reference numerals refer to like parts throughout the various views unless otherwise specified.

Fig. 1 illustrates a cross-flow heat sink according to an embodiment.

Fig. 2 illustrates a cross-flow heat sink in accordance with an embodiment.

Fig. 3 illustrates a method of fabricating a cross-flow heat sink according to an embodiment.

Fig. 4 illustrates a method of using a cross-flow heat sink according to an embodiment.

Fig. 5 illustrates an unassembled cross-flow heat sink according to an embodiment.

Fig. 6 illustrates a cross-flow heat sink in accordance with an embodiment.

Fig. 7 illustrates air flow lines generated by a heat source under a heat sink according to an embodiment.

Fig. 8 illustrates a method for a heat sink having ribs according to an embodiment.

Fig. 9 illustrates a cross-flow heat sink in accordance with an embodiment.

Fig. 10 illustrates a cross flow heat sink system according to an embodiment.

Fig. 11 and 12 illustrate a cross flow heat sink system according to an embodiment.

Fig. 13 illustrates a method for fabricating a cross-flow heat sink according to an embodiment.

Fig. 14 illustrates a method for using a cross-flow heat sink in accordance with an embodiment.

Fig. 15 illustrates a cross flow heat sink system according to an embodiment.

Fig. 16 illustrates a cross-flow heat sink in accordance with an embodiment.

Fig. 17 illustrates a cross flow heat sink system according to an embodiment.

Fig. 18 and 19 show an embodiment of a base to which fins formed from folded sheet metal are attached.

Fig. 20 and 21 illustrate a heat sink according to an embodiment.

Fig. 22 illustrates a method for using a cross-flow heat sink in accordance with an embodiment.

Corresponding reference characters indicate corresponding parts throughout the several views. Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of various embodiments of the present disclosure. Also, common but well-understood elements that are useful or necessary in a commercially feasible embodiment are often not depicted in order to facilitate a less obstructed view of these various embodiments of the present disclosure.

Embodiments may employ a series of extruded and exposed fins that increase the surface area of the heat sink, thereby creating additional air flow. As the warmer air rises within the system, cooler air is drawn into the heat sink. The fins may have exposed sides, a lower surface, and an upper surface. The exposed and unobstructed surface allows cooler air to be drawn in toward the central axis of the lamp fixture above the lamp source and then flow upward. This process may cool the fins by passively drawing cooler air within the body of the lamp fixture. In addition, the spacing between the fins may be wide enough to allow air to freely enter the heat sink.