WO2022252396A1 - Heat dissipation module and projector - Google Patents

Abstract

A heat dissipation module (100) used for a projector (10). The heat dissipation module (100) comprises at least one heat pipe (110) and a cold-forged heat sink (120). A heating end (111) of the at least one heat pipe (110) is arranged on a backlight side of a light source module (200) of the projector (10). A condensation end (112) of the at least one heat pipe (110) is fixedly disposed in the cold forging heat sink (120). Heat dissipation for the light source module (200) in the projector (10) is achieved by means of the heat pipe (110) and the cold-forged heat sink (120). The heat dissipation module (100) has a simple production process, low costs, low thermal resistance and good reliability.

Description

A cooling module and projection light machine

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202110613973.2 filed on June 2, 2021, and the title of the invention is "A Heat Dissipation Module and Projector Optical Machine", the entire contents of which are incorporated herein by reference. Applying.

technical field

The embodiment of the present application relates to the technical field of projection light machine design, and in particular to a heat dissipation module and a projection light machine.

Background technique

During the operation of the optical engine module in the projection equipment, the light source module will convert electric energy into light energy and heat energy during the operation process due to the limitation of physical characteristics. Influenced by the material of the light source chip, packaging material and process, the components in the light source module, such as the PN junction in the light-emitting diode light source, when the temperature rises, the luminous efficiency of the light source module usually decreases, the color temperature drifts, and the forward voltage (VF value) drift, and even the risk of burning electronic components.

In the process of realizing the embodiment of the present application, the inventors found that there are at least the following problems in the above related technologies: At present, in order to solve the problem that the light source in the projection light machine is easy to overheat, the existing solution usually chooses to reduce the heat generation of the light source, for example, reduce The number of light sources such as light-emitting diodes in the light source increases the area of the light source panel, or directly adopts cold light sources or fluorescent light sources with low thermal efficiency, etc. Most of them are improvements for light sources, but such improvements will bring light sources Problems such as unsatisfactory luminous effect and increased cost.

Contents of the invention

The embodiment of the present application provides a heat dissipation module and a projection light engine with simple process, good reliability and low cost.

The purpose of the embodiment of the application is achieved through the following technical solutions:

In order to solve the above technical problems, in the first aspect, the embodiment of the present application provides a heat dissipation module, which is applied to a projection light machine, and the projection light machine is provided with a light source module, and the heat dissipation module includes:

At least one heat pipe, the heating end of which is arranged on the backlight side of the light source module;

A cold forged radiator, the condensation end of the at least one heat pipe is fixedly arranged in the cold forged radiator.

In some embodiments, the cold forged heat sink is an aluminum structure integrally formed by extruding an aluminum block through a forging die.

In some embodiments, the heat dissipation module also includes:

The fan is arranged on one side of the cold forged radiator.

In some embodiments, the light source module includes a light emitting diode light source and a copper substrate, and the light emitting diode light source is fixedly arranged on one side of the copper substrate,

The heating end of the at least one heat pipe is fixed on the other side of the copper substrate by low-temperature solder paste welding.

In some embodiments, the cold forged heat sink is provided with the same number of slots as the heat pipes, and the condensation end of the at least one heat pipe is fixed in the cold forged heat sink through the slots.

In some embodiments, the condensing end of the at least one heat pipe is fixed in the slot of the cold forged radiator by low-temperature soldering.

In some embodiments, the condensation end of the at least one heat pipe is fixed in the slot of the cold forged heat sink through interference fit.

In some embodiments, the number of the heat pipes is two, and the number of the slots is two.

In order to solve the above technical problems, in the second aspect, an embodiment of the present application provides a projection light machine, including:

light source module;

As described in the first aspect, the heat dissipation module is arranged on the backlight side of the light source module.

In some embodiments, the projection light machine also includes:

The projection lens is arranged on the light output side of the light source module.

Compared with the prior art, the beneficial effect of the present application is: different from the prior art, the embodiment of the present application provides a heat dissipation module applied to the projection light machine, the heat dissipation module includes: at least one The heat pipe and the cold forging radiator, the heating end of at least one heat pipe is arranged on the backlight side of the light source module of the projection light machine, the condensation end of the at least one heat pipe is fixedly arranged in the cold forging radiator, through the The heat pipe and the cold-forged radiator realize the heat dissipation of the light source module in the projection light machine. The heat dissipation module provided by the embodiment of the present application has simple manufacturing process, low cost, low thermal resistance and good reliability.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, these exemplifications do not constitute a limitation to the embodiments, and elements/modules with the same reference numerals in the drawings are represented as similar Components/modules, unless otherwise stated, the figures in the drawings do not constitute scale limitations.

FIG. 1 is a schematic structural view of a heat dissipation module provided in Embodiment 1 of the present application at a viewing angle;

Fig. 2 is a structural schematic diagram of a heat dissipation module provided in Embodiment 1 of the present application from another perspective;

Fig. 3 is a schematic structural view of the heat pipe in the cooling module shown in Fig. 1;

Fig. 4 is a schematic view of the structure of the cold-forged radiator in the heat dissipation module shown in Fig. 1 at a viewing angle;

Fig. 5 is a schematic structural view of the cold-forged heat sink in the heat dissipation module shown in Fig. 1 from another perspective;

FIG. 6 is a schematic structural diagram of a projection light machine provided in Embodiment 2 of the present application.

Detailed ways

The present application will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application. These all belong to the protection scope of this application.

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

It should be noted that, if there is no conflict, various features in the embodiments of the present application may be combined with each other, and all of them are within the protection scope of the present application. In addition, although the functional module division is performed in the schematic diagram of the device, in some cases, the division may be different from that in the device.

It should be noted that when an element is said to be "fixed" to another element, it may be directly on the other element, or there may be one or more intervening elements therebetween. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of this application. The terminology used in the description of the present application is only for the purpose of describing a specific embodiment, and is not used to limit the present application. The term "and/or" used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features involved in the various embodiments of the present application described below may be combined with each other as long as they do not constitute a conflict with each other.

In order to solve the problem that the heat dissipation of the light source module in the current projection light machine is difficult and the temperature is too high, the embodiment of the present application provides a heat dissipation module that integrates light source, heat transfer, and heat exchange and is applied to the projection light machine , by adding a heat pipe to the light source module, and then conducting the heat to the cold forging radiator through the heat pipe to realize heat dissipation, the manufacturing process is simple, the cost is low, and the heat dissipation efficiency of the light source module can be effectively improved, and the reliability is good. Reduce the thermal resistance of the entire optomechanic.

Specifically, the embodiments of the present application will be further described below in conjunction with the accompanying drawings.

Embodiment one

The embodiment of the present application provides a heat dissipation module, please refer to Fig. 1 and Fig. 2 together, which respectively show the structure of the heat dissipation module provided by the embodiment of the present application in two viewing angles, and the heat dissipation module can be applied to For the projection light machine, the projection light machine is provided with a heat dissipation module 100 and a light source module 200 , and the heat dissipation module 100 includes: at least one heat pipe 110 and a cold forged radiator 120 .

Further, in some embodiments, please continue to refer to FIG. 1 and FIG. 2 , the heat dissipation module 100 further includes: a fan 130 disposed on one side of the cold forged heat sink 120 . Preferably, the direction of the air inlet and outlet of the fan 130 is set on any side of the cold forged radiator 120 that can generate convection, and/or preferably the side with the largest area, so as to change the direction of the cold forged radiator 120 The convective heat transfer coefficient in the convective heat transfer process improves convective heat dissipation. It should be noted that, in the embodiment of the present application, the fan 130 may not be provided. When the fan 130 is not provided, the heat reaching the cold forging radiator 120 will be dissipated by natural convection. Herein, the location and quantity of the fans 130 can be set according to actual needs, and need not be constrained by the limitations of the embodiments of the present application.

In the embodiment of the present application, please refer to FIG. 1 and FIG. 2, the light source module 200 includes a light-emitting diode (light-emitting diode, LED) light source 210 and a copper substrate 220, and the light-emitting diode light source 210 is fixedly arranged on the On one side of the copper substrate 220 , the heating end 111 of the at least one heat pipe 110 is fixed on the other side of the copper substrate 220 by low-temperature solder paste welding. In the embodiment of the present application, the PN junction of the light emitting diode light source 210 will generate a lot of heat during the operation of the projector, and the heat will be diffused and conducted to the copper substrate through the packaging structure of the light source module 200 220 in. In actual application scenarios, the light source module 200 may not be the structure of the light source module 200 shown in the above structure and accompanying drawings 1 and 2, but may also be other types of light sources, such as lasers, light source bulbs, etc. It can also be installed on other types of substrates. Specifically, it can be set according to actual needs, and does not need to be limited by the limitations of the embodiments of the present application.

The heating end 111 of the at least one heat pipe 110 is arranged on the backlight side of the light source module 200 ; Preferably, the heat pipe 110 can be made of a material with strong thermal conductivity and/or high specific heat capacity, such as metal, which can be hollow or solid. After the material is made into a long rod, it is made by bending For the heat pipe 110, further, a certain amount of frictional treatment can also be performed on both ends of the heat pipe 110 to increase the friction force at both ends, so that the two ends can be respectively fixed on the light source module 200 and the cold forged heat sink 120 can be fixed more firmly. Specifically, the material, shape, and size of the heat pipe 110 can be set according to the heat production of the light source module 200 during actual use, and different sizes and efficiencies can be selected. Heat pipes and the like do not need to be limited by the embodiments of the present application.

The cold forged radiator 120 is an aluminum structure that is integrally formed by extruding an aluminum block through a forging die. The cold forged radiator 120 is provided with the same number of slots 121 as the heat pipes 110 , and the condensation end 112 of the at least one heat pipe 110 is fixed in the cold forged radiator 120 through the slots 121 . Wherein, the cold forged radiator 120 is formed by extruding an aluminum block with a forging die, and then sequentially processed through corresponding secondary processing procedures. Specifically, in the cold forged radiator 120, the heat exchange area and size can be set according to actual needs, and do not need to be constrained by the limitations of the embodiments of the present application.

Wherein, the condensing end 112 of the at least one heat pipe 110 is fixed in the slot 121 of the cold forging radiator 120 by low-temperature soldering, or the condensing end 112 of the at least one heat pipe 110 is fixed by interference fit In the slot 121 of the cold forged radiator 120 . Among them, the method of fixing with low-temperature solder can transfer heat more effectively and quickly, while the method of fixing with interference fit can have the advantages of simple structure, good centering, and high bearing capacity, which can be selected according to the actual situation in actual use. . In some other embodiments, the two ends of the heat pipe 110 can also be respectively fixed on the light source module 200 and the cold forging heat sink 120 in other ways, for example, by buckles, screws, high temperature glue Fixing in other ways such as sticking, specifically, can be set according to actual needs, and does not need to be limited by the limitations of the embodiments of the present application.

Specifically, in the embodiment of the present application, please refer to FIG. 3 , FIG. 4 and FIG. 5 together, wherein FIG. 3 shows a structure of the heat pipe 110 in the heat dissipation module 100 shown in FIG. 1 , and FIG. 4 and FIG. 5 respectively shows a structure of the cold-forged heat sink 120 in the heat dissipation module 100 shown in FIG. 1 at two viewing angles. As shown in FIG. 3 , FIG. 4 and FIG. , the number of the slots 121 is two, and the heat generated by the light source module 200 is conducted to the cold forged heat sink 120 through the two heat pipes 110 to realize heat dissipation. In actual use, the number of slots 121 in the heat pipe 110 and the cold-forged heat sink 120 can be set according to actual needs, and need not be constrained by the limitations of the embodiments of the present application.

The heat dissipation module provided in the embodiment of the present application adopts the method of directly welding and assembling the copper substrate 220 of the light source module 200, the heat pipe 110 and the cold forging radiator 120 into an integral module at low temperature, and the LED light source 210 is packaged in On the copper substrate 220, when working, the LED light source 210 will generate a large amount of heat power during operation, and the heat power will be conducted to the at least one The heating end 111 of the root heat pipe 110 uses the heat transfer characteristics of the evaporation and condensation phase change of the heat pipe 110 to conduct heat power from the heating end 111 to the condensation end 112, and the condensation end 112 of the heat pipe 110 diffuses the heat power to the cold forging radiator 120 , the fan 130 provides the air volume and wind pressure for forced convection heat exchange to the cold forged radiator 120 , and convects heat on the heat exchange surface of the cold forged radiator 120 .

Embodiment two

The embodiment of the present application provides a light projection machine, please refer to Fig. 6, which shows the structure of a light projection machine provided in the embodiment of the present application, the light projection machine 10 includes: as described in the first embodiment above The heat dissipation module 100 and the light source module 200 are arranged on the backlight side of the light source module 200 .

The heat dissipation module 100 is the heat dissipation module 100 described in the first embodiment above. For its specific structure and connection method, please refer to the above embodiment one and the accompanying drawings, and the heat dissipation module 100 will not be discussed here The structure is described in detail.

The light source module 200 may be the light source module 200 described in the first embodiment above, or other light source modules that can be applied to projection equipment, such as ultra-high pressure mercury bulbs, ultra-high pressure mercury bulbs, xenon lamps, halogen lamps, etc. Traditional light sources such as light, or laser light sources, etc., can be specifically selected and set according to actual needs, and do not need to be limited by the limitations of the embodiments of the present application.

Further, please continue to refer to FIG. 6 , the light projection machine 10 further includes: a projection lens 300 disposed on the light output side of the light source module 200 . The projection lens 300 is a device capable of being irradiated by the light source module 200 to generate a projection image and adjust the projection image to achieve projection. Preferably, it should at least include a projection chip and a lens group. The projection chip is used to receive the The light source light emitted by the light source module 200 generates projection image light, and the lens group is used to adjust the focal length, distortion, projection direction and size of the projected image, etc. Specifically, the specific structure of the projection lens 300 can be adjusted according to actual needs For setting, it is not necessary to be constrained by the description and limitation of the embodiment of the present application.

An embodiment of the present application provides a heat dissipation module applied to a projection light machine. The heat dissipation module includes: at least one heat pipe and a cold forging heat sink. The heating end of at least one heat pipe is arranged on the light source module of the projection light machine. On the backlight side of the group, the condensing end of the at least one heat pipe is fixedly arranged in the cold forged radiator, and the heat dissipation of the light source module in the projection light machine is realized through the heat pipe and the cold forged radiator, The heat dissipation module provided by the embodiment of the present application has simple manufacturing process, low cost, low thermal resistance and good reliability.

It should be noted that the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physically separated. A unit can be located in one place, or it can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; under the thinking of the present application, the above embodiments or technical features in different embodiments can also be combined, The steps can be performed in any order, and there are many other variations of the different aspects of the application as described above, which have not been presented in detail for the sake of brevity; although the application has been described in detail with reference to the preceding examples, those of ordinary skill in the art The skilled person should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the implementation of the present application. The scope of technical solutions.

Claims (10)

1. A heat dissipation module is characterized in that it is applied to a projection light machine, and the projection light machine is provided with a light source module, and the heat dissipation module includes:

   At least one heat pipe, the heating end of which is arranged on the backlight side of the light source module;

   A cold forged radiator, the condensation end of the at least one heat pipe is fixedly arranged in the cold forged radiator.
2. The cooling module according to claim 1, characterized in that,

   The cold forged radiator is an aluminum structure integrally formed by extruding an aluminum block through a forging die.
3. The cooling module according to claim 2, characterized in that,

   The cooling module also includes:

   The fan is arranged on one side of the cold forged radiator.
4. The cooling module according to claim 3, characterized in that,

   The light source module includes a light emitting diode light source and a copper substrate, the light emitting diode light source is fixedly arranged on one side of the copper substrate,

   The heating end of the at least one heat pipe is fixed on the other side of the copper substrate by low-temperature solder paste welding.
5. The cooling module according to claim 4, characterized in that,

   The cold forging radiator is provided with the same number of slots as the heat pipes, and the condensation end of the at least one heat pipe is fixed in the cold forging radiator through the slots.
6. The cooling module according to claim 5, characterized in that,

   The condensing end of the at least one heat pipe is fixed in the slot of the cold-forged radiator by low-temperature soldering.
7. The cooling module according to claim 5, characterized in that,

   The condensing end of the at least one heat pipe is fixed in the slot of the cold forged radiator through interference fit.
8. The cooling module according to claim 6 or 7, characterized in that,

   The number of the heat pipes is two, and the number of the slots is two.
9. A projection light machine, characterized in that it comprises:

   light source module;

   The heat dissipation module according to any one of claims 1 to 1, which is arranged on the backlight side of the light source module.
10. The projection light machine according to claim 9, characterized in that,

    The projection light machine also includes:

    The projection lens is arranged on the light output side of the light source module.

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