Water cooling head of LED light source of projector

Abstract

The utility model discloses a water cooling head of an LED light source of a projector. Two opposite sides of the water cooling head are respectively provided with a water inlet joint and a water outlet joint which are used for being connected with a water pipe. A straight-through water passing duct is arranged in the water cooling head, and the water passing duct penetrates through the water inlet connector and the water outlet connector; the number of the water passing ducts is one or more, and the water passing ducts are arranged in parallel. The water cooling head is provided with an installation face attached to the LED light source and a plurality of screw holes used for being connected with the LED light source. The LED light source water-cooling head can completely replace an existing standard part water-cooling head on a high-power light source occasion, and has the advantages that cost is lower, resistance of cooling water flow in the water passing channel is small, cavitation of the cooling water flow to the water-cooling head is slight, turbulence and turbulent flow are avoided, screw holes can be flexibly manufactured, and an LED light source can be conveniently installed.

Description

Technical Field

[0001] The utility model belongs to the technical field of projectors, and particularly relates to a water-cooled head for a projector LED light source. Background Art

[0002] In recent years, the input power of domestic projector LED light sources has shown an increasing development trend. When the electric power of the LED light source ≥ 120 watts, using a water-cooling method (including necessary components such as a water-cooled head, a water pump, a water pipe, a water-cooled radiator, a fan, etc.) for heat dissipation of the LED light source has better technical adaptability and economy.

[0003] The water-cooled head is a very mature component. Its main application industry is for heat transfer or heat conduction of semiconductor refrigeration chips (Peltier elements). Among them, the size of 40mm * 40mm (the thickness is generally about 6 - 12mm) is the most common (specially adapted to 40mm * 40mm Peltier elements). This external dimension has very good adaptability to the LED light source of domestic projectors. However, for these standardized water-cooled heads, it is usually inconvenient and difficult to make screw holes for locking the LED light source to achieve efficient and highly stable heat transfer. In addition, if the water-cooled head adopts a customized method that meets the requirements of the projector and makes multiple screw holes, its cost will increase significantly.

[0004] At the same time, precisely because this type of water-cooled head technology is very mature, taking 40mm * 40mm * 12mm as an example, the bulk purchase price of copper ones is about 40 yuan per piece or more, which is applicable to cost-insensitive scenarios such as heat transfer of computer CPUs. The cost of aluminum ones has almost been optimized to the extreme (the bulk purchase price is about 7 yuan per piece). See Figures 6 - 8 The shown water-cooled head of aluminum standard parts. Perhaps people's first impression is that after an aluminum block is numerically controlled to mill out structures and shapes such as flow channels, and then welded and sealed. That is, the water-cooled head is formed by butt-welding two aluminum products. In fact, its manufacturing process and structure are completely different. It is made by stamping (the aluminum plate is about 0.8 - 1mm thick) from an aluminum plate to obtain materials. Multiple pieces of aluminum plates obtained by stamping (for example, Figure 6 there are 11 aluminum plates in total, that is, the 6 wall surfaces of the water-cooled head plus the 5 internal baffles) are placed on a jig for splicing. After being preliminarily fixed by laser spot welding (or argon arc spot welding), brazing is carried out to complete the sealing. Finally, the heat-receiving surface is turned to obtain a certain flatness to form the final product. The purpose of doing this is not to improve the heat exchange performance, but to achieve the extreme of cost.

[0005] Obviously, there are many problems with this type of aluminum water block. First, it is not very suitable for the more cost - demanding reality of domestic projectors. Second, through the splicing and welding of multiple aluminum plates, its heat conduction, heat transfer, and heat exchange effects are not good. Taking a 150 - watt light source as an example, under the premise of normal fan and water pump noise in the industry, a 23°C environment, etc., the temperature of the LED light source substrate (the back of the LED light - emitting body) is as high as over 60°C, which lacks competitiveness in terms of both performance and price.

[0006] Therefore, in the face of the mature water - cooling technologies in other industries, it cannot be simply considered that they are also suitable for domestic projectors. It is necessary to solve problems based on actual situations and develop water blocks that are more suitable for this industry. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a water block for a projector LED light source suitable for domestic projectors according to the technical development trend of the industry for the water - cooling application of LED light sources. It has many advantages such as lower cost, small resistance of the cooling water flow in the water - passing duct, slight cavitation of the cooling water flow on the water block, no turbulent flow and no chaotic flow, and can flexibly make screw holes for easy installation of the LED light source.

[0008] To achieve the above - mentioned purpose, the present utility model provides a water block for a projector LED light source. On the opposite sides of the water block, there are respectively an inlet joint and an outlet joint for connecting water pipes; inside the water block, there is a straight - through water - passing duct, and the water - passing duct penetrates through the inlet joint and the outlet joint; the number of the water - passing ducts is one, or multiple and arranged in parallel; on the water block, there is an installation surface that fits the LED light source and multiple screw holes for connecting the LED light source.

[0009] Preferably, the material of the water block is any one of pure aluminum, aluminum alloy, or aluminum for die - casting.

[0010] Preferably, screw holes are provided on both sides of the water - passing duct of the water block, and at least two screw holes are provided on each side of the water - passing duct.

[0011] The beneficial effects of the present utility model are as follows: The water block of the present utility model is used for the water - cooling of the LED light source and is suitable for domestic projectors. When in use, the inlet joint and the outlet joint are connected to the water pipes, the cooling water flows through the water - passing duct, the installation surface on the water block fits the LED light source, and the water block is connected and fixed to the LED light source through the screw holes. The water block of the present utility model can completely replace the existing standard water blocks in the case of high - power light sources, and also has many advantages such as lower cost, small resistance of the cooling water flow in the water - passing duct, slight cavitation of the cooling water flow on the water block, no turbulent flow and no chaotic flow, and can flexibly make screw holes for easy installation of the LED light source. Description of the Drawings

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for describing the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 Schematic diagram of an embodiment of the present invention;

[0014] Figure 2 For Figure 1 sectional view;

[0015] Figure 3 For Figure 1 display view of the embodiment from another angle;

[0016] Figure 4 Schematic diagram of another embodiment of the present invention;

[0017] Figure 5 Schematic diagram of yet another embodiment of the present invention;

[0018] Figure 6 Sectional view of a standardized 40mm * 40mm water block of the existing standard parts;

[0019] Figure 7 For Figure 6 external shape display view of the water block;

[0020] Figure 8 For Figure 6 further display of the fluid of the water block.

[0021] The above-mentioned reference numerals:

[0022] 1. Water block; 11. Water inlet joint; 12. Water outlet joint; 13. Water passage duct; 14. Mounting surface. Detailed implementation manners

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the drawings. The description of this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0024] It should be noted that: similar reference numerals represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] It should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0026] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] Embodiment 1:

[0029] See Figures 1 - 3 As shown, this embodiment provides a water-cooled head for a projector LED light source. On the opposite sides of the water-cooled head 1, there are respectively provided a water inlet joint 11 and a water outlet joint 12 for connecting water pipes; inside the water-cooled head 1, there is a straight-through water passage 13, and the water passage 13 penetrates through the water inlet joint 11 and the water outlet joint 12; the number of the water passages 13 is three and they are arranged in parallel; on the water-cooled head 1, there is an installation surface 14 that fits with the LED light source and a plurality of screw holes for connecting the LED light source.

[0030] In this embodiment, the material of the water-cooled head 1 is any one of pure aluminum, aluminum alloy, or aluminum for die-casting. Preferably, the material of the water-cooled head 1 is 6063. The processing process of the water-cooled head 1 is as follows: after extruding the blank (i.e., extruding the outer shape of the cross-section of the water passage 13 and the water-cooled head 1), the water inlet joint 11 and the water outlet joint 12 are turned out by a machine tool, drilling and tapping are carried out to make screw holes according to actual requirements, and the installation surface 14 that fits with the LED light source is quickly leveled by a flywheel.

[0031] This embodiment can be completely replaced in the occasion of extremely high power (such as the power of LED light source is 140-150 watts). Figures 6 - 8 The standard water-cooled head shown, and it also has many advantages that the standard water-cooled head does not have at all, such as low cost (the batch purchase of the same quantity < 4 yuan / piece), small resistance of the cooling water flow in the water passing duct 13 (because the water passing duct 13 is straight), slight cavitation of the cooling water flow to the water-cooled head 1, no turbulent flow and no eddy current, and it can be flexibly made with screw holes for easy installation of LED light sources and other standard parts.

[0032] Such as Figure 7 The forms of the standard water-cooled head 1' shown are diverse. There are those with water inlet on one side and water outlet on the other side, and those with water inlet and water outlet on the same side. No matter what kind of structure, the flow of water inside is very complex and does not flow evenly. To further illustrate the innovation and advancement of the present invention, see Figure 8 As shown, the water-cooled head 1' is provided with a water inlet joint 11' and a water outlet joint 12'. After the water flow is pumped into the water-cooled head 1', it is divided into six groups (channels) of fluids f1'-f6' by the internal baffle to take away the heat of the heat source.

[0033] Obviously, the flow rate and velocity of the water flow in the f1' channel and the f6' channel are relatively the largest, while the flow velocity and flow rate of the water flow in the f3' channel and the f4' channel are relatively the smallest. The non-uniformity (flow rate, velocity, etc.) of the six groups of fluids f1'-f6' has little or no impact on the application of the Peltier element that generates heat (or cools) relatively evenly on the 40mm * 40mm size, that is, on the 1600mm 2 plane, but for the heat dissipation of the LED light source of the projector, the impact objectively exists and cannot be ignored. Generally, the LED light source of the projector is mainly composed of a metal substrate 21' and an LED light-emitting body 22'. The LED light-emitting body 22' is made on the metal substrate 21' (such as the COB structure, common sense in the industry). The size of the LED light-emitting body 22' is relatively extremely small. Taking the commonly used 140 watts, 10 strings in parallel with 6 and 45mil wafers in the industry as an example, the size of the light-emitting body is about 13.5 * 8mm, that is, 108mm 2 , The LED light source along Figure 7The arrow in [it] is attached to the water block 1'. Often, the LED light-emitting body 22' (which is essentially the heat source) is located between f3' and f4' of the water block 1', that is, centered. The heat transfer effect is not good. Unless the power of the water pump is increased, but the noise becomes a problem. This is why the standard water block is not very suitable for the LED light source of domestic projectors. Additionally, expecting the heat to diffuse in the plane of the LED light-emitting body 22' and the metal substrate 21', and then be transferred to the f1 and f6 water channels to quickly remove the heat is itself unrealistic because the thickness of the metal substrate 21' is generally only 1.0 - 1.5 mm. As for the phenomena of cavitation and turbulence that cannot be ignored occurring inside the water block 1', since their physical mechanisms are too complex, they are not described in this utility model.

[0034] The water block 1 of this embodiment is used for water cooling of the LED light source and can be applicable to domestic projectors. When in use, the water inlet joint 11 and the water outlet joint 12 are connected to the water pipe, the cooling water flows through the water passage 13, the mounting surface 14 of the water block 1 is attached to the LED light source, and the water block 1 is connected and fixed to the LED light source through the screw holes. This embodiment can completely replace the existing standard water block in the case of high-power light sources, and also has many advantages such as lower cost, small resistance of the cooling water flow in the water passage 13, slight cavitation of the cooling water flow on the water block 1, no turbulent flow and no eddy current, and can flexibly make screw holes for facilitating the installation of the LED light source.

[0035] Embodiment Two:

[0036] See Figure 4 As shown, the difference between Embodiment Two and Embodiment One is that the number of the water passages 13 is two and they are arranged in parallel.

[0037] Embodiment Three:

[0038] See Figure 5 As shown, the difference between Embodiment Three and Embodiment One is that the number of the water passages 13 is one.

[0039] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0040] In this text, specific examples are used to elaborate on the principle and implementation mode of the present utility model. The description of the above examples is only used to help understand the method and its core idea of the present utility model. The above is only the preferred implementation mode of the present utility model. It should be noted that due to the limitation of digital expression, and objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements, refinements or changes can also be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the utility model to other occasions without improvement, shall all be regarded as the protection scope of the present utility model.

Claims

1. A water-cooled head of a projector LED light source, characterized in that, On opposite sides of the water block (1), there are respectively a water inlet joint (11) and a water outlet joint (12) for connecting water pipes; inside the water block (1), there is a straight-through water passage (13), and the water passage (13) penetrates through the water inlet joint (11) and the water outlet joint (12); the number of the water passages (13) is one, or multiple and arranged in parallel; on the water block (1), there is a mounting surface (14) that fits the LED light source and multiple screw holes for connecting the LED light source.

2. The water-cooled head of a projector LED light source according to claim 1, characterized in that, The material of the water block is any one of pure aluminum, aluminum alloy, or aluminum for die-casting.

3. The water-cooled head of a projector LED light source according to claim 1, characterized in that, On both sides of the water passage (13) of the water block (1), there are screw holes, and at least two screw holes are provided on each side of the water passage (13).

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