CN204301011U - The cooling system of closed Wavelength converter and laser display system - Google Patents

Abstract

The utility model provides a heat dissipation system of a closed wavelength conversion device and a laser display system, which solves the technical problem of heat dissipation of the closed wavelength conversion device in the laser display system; it includes a wavelength conversion device, an outer shell, a first water pipe, a second Water pipes, water pumps, water storage devices and the first heat dissipation device; the outer shell is provided with an interlayer; the water stored in the water storage device is pumped into the outer shell interlayer by the water pump, and after absorbing and taking away the heat generated by the wavelength conversion device, it passes through the first After the heat dissipation of the cooling device, it flows into the water storage device again. The sealing of the outer shell prevents dust from entering the wavelength conversion device and plays a role of dust prevention. The water storage device, the water pump and the first heat dissipation device cooperate to use cold water to dissipate heat for the wavelength conversion device, realizing the heat dissipation effect of the closed wavelength conversion device.

Description

Heat dissipation system and laser display system of closed wavelength conversion device

technical field

The utility model relates to the technical field of laser display, in particular to a cooling system of a closed wavelength conversion device and a laser display system.

Background technique

In the laser display system, the laser is used as the excitation light source to excite the fluorescent material to generate three primary colors of light; the excitation light source and the generated light have different wavelengths, so the devices that realize this part of the conversion are collectively referred to as wavelength conversion devices in the laser display system.

When the fluorescent material is excited to emit light, it will generate a large amount of heat, which will heat the fluorescent material and even the entire wavelength conversion device, and finally reach thermal equilibrium. As the light intensity and power of the laser increase, the temperature of the wavelength conversion device will become higher and higher when it reaches thermal equilibrium, and an excessively high temperature will shorten the life of the wavelength conversion device, thereby affecting the service life of the entire laser display system.

In order to achieve good heat dissipation of the wavelength conversion device, the current wavelength conversion device usually adopts an open wavelength conversion device as shown in Figure 6. This wavelength conversion device includes a wavelength conversion layer 2, a fluorescent material 3 attached to the wavelength conversion layer , and the driving device 1 that drives the wavelength conversion layer to rotate, they work in an open environment without any shielding body, and the heat generated during their work can be dissipated quickly, but it is inevitable due to its open structure Facing the problem of dust accumulation. The existence of dust will affect the luminous efficiency of fluorescent materials, which will reduce the luminous efficiency of the entire laser display system; and the closed wavelength conversion device is to place the wavelength conversion device in a closed space formed by a shield. Although the wavelength conversion device can prevent the luminous efficiency of the fluorescent material from being affected by the entry of external dust, the heat generated during work cannot be dissipated, and there is a problem of heat dissipation.

Contents of the invention

The embodiment of the present application solves the heat dissipation problem of the closed wavelength conversion device by providing a heat dissipation system of the closed wavelength conversion device and a laser display system.

In order to solve the above technical problems, the embodiment of the present application adopts the following technical solutions to achieve:

A heat dissipation system of a closed wavelength conversion device is proposed, including a wavelength conversion device and an outer casing, and the wavelength conversion device is located in a closed space formed by the outer casing; the heat dissipation system also includes: a first water pipe, a second water pipe , a water pump, a water storage device, and a first heat dissipation device; the outer casing is provided with an interlayer; the water outlet of the water storage device is connected to the water inlet of the water pump, and the water outlet of the water pump is connected to the inlet of the first water pipe water outlet; the water outlet of the first water pipe is connected to the water inlet of the outer casing interlayer; the water outlet of the outer casing interlayer is connected to the water inlet of the second water pipe; the second water pipe passes through the first heat dissipation device, the water outlet of which is connected to the water inlet of the water storage device; the water stored in the water storage device is pumped into the first water pipe by the water pump, and takes away the water when it flows through the interlayer of the outer casing. The heat generated by the wavelength conversion device flows into the first heat dissipation device through the second water pipe, and flows into the water storage device again after being dissipated by the first heat dissipation device.

Further, the system further includes a first fan; the first fan is placed on one side of the first heat dissipation device for accelerating heat dissipation of the first heat dissipation device.

Further, a first flap is arranged inside the water storage device.

Further, the system further includes a thermoelectric refrigeration device; the thermoelectric refrigeration device includes a relative cooling surface and a relative heating surface, and the relative cooling surface is arranged on the outer wall of the water storage device.

Further, the system further includes a second heat dissipation device; the second heat dissipation device is arranged on the opposite heating surface.

Further, the system further includes a second fan; the second fan is placed on one side of the second heat sink.

Further, the inner wall of the housing is provided with a second flap.

Further, the heat dissipation system also includes a cold water pipe; the cold water pipe is placed in the interlayer of the outer shell, one end of which is connected to the water inlet of the interlayer of the outer shell, and the other end is connected to the water outlet of the interlayer of the outer shell.

Further, the cold water pipeline is curved.

Further, the heat dissipation system also includes a second cold water pipe, which is placed in the first heat dissipation device and connected to the second water pipe, and divides the second water pipe into a first sub-water pipe and a second sub-pipe. water pipe; the water inlet of the first water pipe is the water inlet of the second water pipe, the water outlet of the first sub-water pipe is connected to one end of the second cold water pipe, and the other end of the second cold water pipe is connected to the The water inlet of the second sub-water pipe, the water outlet of the second sub-water pipe is the water outlet of the second water pipe.

Further, the first cooling device is composed of a plurality of parallel fins; the second cold water pipe is connected with the plurality of parallel fins.

A laser display system is also proposed, including a wavelength conversion device, and the heat dissipation system of the above-mentioned closed wavelength conversion device.

Compared with the prior art, the technical solution provided by the embodiment of the present application has the following technical effects or advantages: in the embodiment of the present application, a closed outer casing is provided outside the wavelength conversion device, and the closed outer casing can effectively prevent dust from falling into the wavelength conversion device, the heat generated by the wavelength conversion device will then increase the temperature of the air in the closed space and the outer shell, and realize the The following process: the water cooling circulation system can make cold water circulate in the heat dissipation system of the entire closed wavelength conversion device. During the flow of cold water, the heat of the outer shell is continuously taken away to reduce the temperature of the outer shell, and through heat conduction, the hot air in the closed space is transferred to The outer casing, and the heat of the outer casing is continuously taken away by the cold water flowing through the cold water pipe, thereby realizing heat exchange, and continuously taking away the heat in the closed space, thereby achieving the purpose of cooling and dissipating heat for the wavelength conversion device; the cooling water The flow is realized by the water pump, the water storage device and the heat dissipation device. The cold water is first pumped from the water storage device into the cold water pipeline by the water pump. During the process of flowing through the cold water pipeline, the heat of the outer shell is taken away, and the heat of the outer shell makes the cold water warm up. , the heated water flows into the pipeline, and starts to dissipate heat and cool down during the flow of the pipeline. When it flows through the cooling device, most of the heat is dissipated by the cooling device, thereby cooling down. The cooled water flows into the water storage device again, and the water storage device The cold water is mixed, which further reduces the temperature, and then becomes cold water which is pumped into the cold water pipe again by the water pump, and continues to cool the outer shell; the above-mentioned heat dissipation system which takes away the heat generated by the wavelength conversion device through the flow of cold water effectively solves the problem of closed The heat dissipation problem of the wavelength conversion device.

Description of drawings

FIG. 1 is a system structure diagram of the heat dissipation system of the closed wavelength switching device proposed in the embodiment of the present application;

FIG. 2 is a schematic structural diagram of a first heat dissipation device proposed in an embodiment of the present application;

Fig. 3 is a system structure diagram of the heat dissipation system of another closed wavelength switching device proposed in the embodiment of the present application;

Fig. 4 is the schematic structural diagram of the cold water pipeline proposed in the embodiment of the present application;

FIG. 5 is a system structure diagram of a heat dissipation system of another closed wavelength conversion device proposed in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of an existing open wavelength conversion device.

Detailed ways

The embodiment of the present application proposes a heat dissipation system of a closed wavelength conversion device and a laser display system to solve the heat dissipation problem of the closed wavelength conversion device in the laser display system; by setting a water circulation heat dissipation system in the closed wavelength conversion device, The technical effect of cooling the closed wavelength conversion device is realized.

In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation manners.

As shown in Figure 1, it is a structural diagram of the heat dissipation system of the closed wavelength conversion device proposed in the embodiment of the present application, including the wavelength conversion device 1, the outer shell 2, the first water pipe 31, the second water pipe 32, the water pump 4, and the water storage device 5 and the first cooling device 6; the wavelength conversion device is located in the closed space formed by the outer shell; the outer shell 2 has an interlayer 23.

The water outlet 51 of the water storage device is connected to the water inlet 41 of the water pump, and the water outlet 42 of the water pump is connected to the water inlet of the first water pipe; the water outlet of the first water pipe is connected to the water inlet 211 of the outer casing interlayer; the water outlet 212 of the outer casing interlayer is connected to The water inlet of the second water pipe; the second water pipe passes through the first cooling device, and its water outlet is connected to the water inlet 611 of the water storage device;

The water (cold water) stored in the water storage device is pumped into the first water pipe by the water pump 4, absorbs and takes away the heat generated by the wavelength conversion device when flowing through the interlayer of the outer casing, and flows into the first heat dissipation device through the second water pipe, And through the heat dissipation of the first heat dissipation device, it flows into the water storage device again.

Specifically, a closed outer casing is provided outside the wavelength conversion device, which can effectively prevent dust from falling into the wavelength conversion device, and the heat generated by the wavelength conversion device will then increase the temperature of the air in the closed space and the outer casing , by using the water cooling circulation system composed of water pipes, water pumps, water storage devices and the first heat dissipation device, the following process is realized: the water cooling circulation system can make cold water circulate in the heat dissipation system of the entire closed wavelength conversion device, and the cold water flow process is constantly The heat taken away from the outer shell reduces the temperature of the outer shell, and through heat conduction, the hot air in the closed space is transferred to the outer shell, and the heat of the outer shell is continuously taken away by the cold water flowing through the cold water pipe, thereby realizing heat exchange and sealing The heat in the type space is continuously taken away, thereby achieving the purpose of cooling and cooling the wavelength conversion device; the flow of cold water is jointly realized by the water pump, water storage device and heat dissipation device, and the cold water is first pumped from the water storage device into the cold water pipeline by the water pump. In the process of flowing through the cold water pipeline, the heat of the outer casing is taken away, and the heat of the outer casing makes the cold water heat up, and the heated water flows into the pipeline, and begins to dissipate heat and cool down during the flow of the pipeline. Dissipate most of the heat, thereby cooling down, the cooled water flows into the water storage device again, mixes with the cold water in the water storage device, further reduces the temperature, and then becomes cold water and is pumped into the cold water pipe again by the water pump to continue cooling the outer shell ; As mentioned above, the heat dissipation system that takes away the heat generated by the wavelength conversion device through the flow of cold water effectively solves the problem of heat dissipation of the closed wavelength conversion device.

The closed wavelength conversion device also effectively avoids dust and reduces the noise generated during the working process of the wavelength conversion device, improving user experience.

As shown in Figure 1, the wavelength conversion device 1 specifically includes a wavelength conversion layer 12 and a driving device 11; a fluorescent material is attached to the wavelength conversion layer to absorb laser light and generate excited fluorescence; the driving device is connected to the wavelength conversion layer to drive the wavelength conversion Layers rotate periodically. One side of the driving device is connected to the inner wall of the outer casing, and the driving wire hole of the driving device is set on the outer casing, so that the driving wire of the driving device can extend out of the outer casing to connect with the external circuit, and the driving wire hole is sealed with sealing measures .

In order to quickly transfer the heat in the closed space of the outer casing to the outer casing, thereby quickly transferring it to the cold water pipeline, the outer casing is made of metal, preferably die-cast aluminum.

The interlayer of the outer shell needs to be kept sealed so as to ensure that the water flowing through it will not affect the wavelength conversion device inside the outer shell. If the seal is not sufficient, water will flow into the sealed space. Therefore, in one embodiment of the present invention, in A cold water pipe 21 (as shown in FIG. 3 ) is arranged in the outer shell; the cold water pipe is placed in the outer shell interlayer 23 , one end of which is connected to the water inlet of the outer shell interlayer, and the other end is connected to the water outlet of the outer shell interlayer. The cold water pipeline 21 can ensure that water will not flow into the housing, further ensuring that the wavelength conversion device will not be affected by water.

As shown in Figure 4, the cold water pipe 21 is designed to be curved (multiple S-shaped bends are shown in the figure), the curved design can elongate the path of the cold water pipe in the outer casing, and can take away more of the outer casing body heat.

In yet another embodiment of the present utility model, in order to accelerate the cooling of the water that flows through the interlayer of the outer casing after absorbing heat, the heat dissipation system of the enclosed wavelength conversion device proposed in the embodiment of the present application further includes a first fan 7; the first fan 7 is placed on one side of the first heat dissipation device 6, and is used to blow cold air into the first heat dissipation device. The cold air can quickly take away the heat on the surface of the radiator and accelerate the heat dissipation; the specific model of the fan 7 is based on the actual situation. The situation is selected.

As shown in Fig. 2 and Fig. 3, it is a heat dissipation device 6 proposed by another embodiment of the utility model. As thin as possible, to speed up the heat dissipation, a second cold water pipe 61 is arranged in the radiator, and each fin is closely connected with the second cold water pipe; the second cold water pipe is placed in the radiator (one end of which is connected to the water storage device The water inlet 611, the other end is connected to the water outlet 612 of the water storage device), and connected to the second water pipe, and the second water pipe 32 is divided into the first sub-water pipe 321 and the second sub-water pipe 322 (as shown in Figure 3); The water inlet of the first water pipe is the water inlet of the second water pipe, the water outlet of the first water pipe is connected to one end of the second cold water pipe, the other end of the second cold water pipe is connected to the water inlet of the second water pipe, and the second water pipe The water outlet is the water outlet of the second water pipe.

The water that flows through the cold water pipe 21 after absorbing heat flows into the first sub-water pipe, and flows from the first sub-water pipe into the second cold water pipe. The surface, and through the heat exchange between these surfaces and the air, the heat is transferred to the outside world. Preferably, the second cold water pipe is arranged in a curved shape (multiple S-shaped bends are shown in the figure), which can increase the length of the waterway and increase the contact area between the second cold water pipe and the fins, thereby increasing the heat exchange area and improving Heat exchange efficiency, effectively speed up heat dissipation.

The size and shape of the above-mentioned radiator fins, as well as the design parameters such as the size, length, and shape of the cold water pipe and the second cold water pipe, need to be set in combination with the actual heat that needs to be dissipated and the temperature drop.

The circulation of the entire waterway is formed by the water pump. The installation of the water pump enables the water circulation loop to be completed. At the same time, with the participation of the pump, the water and the wall of the water pipe undergo forced convection heat exchange during the flow process, so that the heat generated by the wavelength conversion device uses water as the medium for heat dissipation.

As shown in Figure 1, a second warp 22 is provided on the inner wall of the housing of the closed wavelength conversion device; the second warp is preferably a needle-shaped warp, which can be connected to the inner wall of the housing by welding, or can be connected as a whole. Formed by die-casting; this form of setting the second flap on the inner wall of the shell can not only increase the heat transfer area, but also increase the agitation of the air in the closed space. This low-speed air flow can improve the heat transfer efficiency.

As shown in FIG. 5 , a first warp 53 can be provided in the water storage device 5 ; the first warp and the inner wall of the water storage device can be connected by welding, and integral die-casting can be adopted. Setting the first warp on the inner wall of the water storage device can increase the heat exchange area, and in the process of water flowing from the water inlet to the water outlet of the water storage device, it needs to flow between each warp, which increases the water flow rate. Stirring in the water storage device, the agitated water can increase the heat exchange efficiency between the water storage device and its inner wall, so that the heat carried in the water can be dissipated to the external environment as much as possible.

In yet another implementation of the present utility model, as shown in FIG. 5 , the heat dissipation system of the closed wavelength conversion device further includes a thermoelectric refrigeration device 8; the thermoelectric refrigeration device includes a relative cooling surface 81 and a relative heating surface 82, and the relative cooling surface is arranged on On the outer wall of the water storage device.

A thermoelectric refrigeration device is a refrigeration device that uses the thermoelectric effect of a solid to generate a certain temperature difference between the relative cooling surface and the relative heating surface by applying the potential difference between the positive and negative electrodes, wherein the temperature of the relative cooling surface is lower than relative to the temperature of the heating surface. The temperature difference between the opposite cooling surface and the opposite heating surface depends on the rated cooling power of the thermoelectric refrigeration device and the potential difference and current applied between its positive and negative electrodes. The most commonly used thermoelectric cooling device is a semiconductor cooling chip, and the temperature difference between the opposite cooling surface and the opposite heating surface ranges from a few degrees Celsius to hundreds of degrees Celsius.

Since the relative cooling surface of the thermoelectric refrigeration device is set on the outer wall of the water storage device, the temperature of the relative cooling surface is low when it is working, which can effectively dissipate heat to the water storage device, so that the water temperature in the water storage device is lower and the temperature is lower. The lower cold water is pumped into the cold water pipe by the water pump. The cold water has a stronger ability to carry heat, and can carry more and faster heat from the outer shell to achieve faster and more effective heat exchange, which can better achieve wavelength replacement. The heat dissipation effect of the device further improves the service life of the wavelength conversion device and the service life of the entire laser display system.

As shown in Figure 5, a second cooling device 9 or a second fan 10 can also be arranged on the opposite heating surface of the thermoelectric cooling device, or a fan 10 can be added outside the second cooling device, these measures can Further improve the heat dissipation effect, reduce the water temperature in the water storage device, and improve the heat exchange efficiency of the wavelength conversion device; the second heat dissipation device can adopt any device in the prior art that can realize heat dissipation, and this embodiment does not be restricted.

The implementation of this application also proposes a laser display system. The wavelength conversion device of the laser display system adopts the above-mentioned closed wavelength conversion device to prevent dust from affecting the wavelength conversion device, and is equipped with the heat dissipation system of the above-mentioned closed wavelength conversion device. , effective heat dissipation measures have been taken while preventing dust, ensuring the heat dissipation effect of the closed wavelength conversion device.

Through the heat dissipation system and laser display system of the enclosed wavelength conversion device proposed in the embodiment of the present application, the wavelength conversion device is sealed by the outer casing, which can effectively prevent dust from affecting the fluorescent material in the wavelength conversion device and ensure the luminescence of the fluorescent material efficiency, and then improve the luminous efficiency of the entire laser display system; for the closed wavelength conversion device, a cold water pipe is added to the outer shell, and through the cooperation of the water storage device, the water pump and the first heat dissipation device, the water storage device The cold water inside is pumped into the cold water pipe. When the cold water flows through the cold water pipe, it takes away the heat of the outer casing, thereby accelerating the heat exchange in the closed space, which solves the heat dissipation problem of the closed wavelength conversion device and carries away the heat. The water passes through the second cold water pipe, and the heat of the water in the second cold water pipe is quickly dissipated to the outside by the multiple fins in the first cooling device, and the heat is accelerated by the first fan, thereby reducing the temperature of the water. After the water flows back to the water storage device, the temperature is further lowered by the thermoelectric refrigeration device placed on the outer wall of the water storage device. With the cooperation of the second heat dissipation device and the second fan, the water temperature is further reduced, so that the water that has absorbed heat will eventually return to cold water. The cold water recirculates into the cold water pipeline, which can continue to dissipate heat to the closed wavelength conversion device, which saves water resources to the greatest extent, and has the effect of dust-proof and heat dissipation on the wavelength conversion device at the same time. Fast, the cooling effect is obvious.

It should be pointed out that the above description is not a limitation of the present utility model, and the present utility model is not limited to the above-mentioned examples. Changes, modifications, additions made by those skilled in the art within the essential scope of the present utility model Or replace, also should belong to the protection domain of the present utility model.

Claims (12)

1. The heat dissipation system of the enclosed wavelength conversion device, comprising a wavelength conversion device and an outer casing, the wavelength conversion device is located in the enclosed space formed by the outer casing, it is characterized in that the heat dissipation system also includes: a first water pipe, a second water pipe, a water pump, a water storage device and a first heat dissipation device; the outer casing is provided with an interlayer; The water outlet of the water storage device is connected to the water inlet of the water pump, and the water outlet of the water pump is connected to the water inlet of the first water pipe; the water outlet of the first water pipe is connected to the water inlet of the outer shell interlayer; The water outlet of the interlayer of the outer casing is connected to the water inlet of the second water pipe; The second water pipe passes through the first heat dissipation device, and its water outlet is connected to the water inlet of the water storage device; The water stored in the water storage device is pumped into the first water pipe by the water pump, takes away the heat generated by the wavelength conversion device when flowing through the interlayer of the outer casing, and flows into the water pipe through the second water pipe. The first heat dissipation device, and through the heat dissipation of the first heat dissipation device, flows into the water storage device again. 2. The heat dissipation system of the enclosed wavelength conversion device according to claim 1, wherein the system further comprises a first fan; the first fan is placed on one side of the first heat dissipation device for Accelerating the heat dissipation of the first heat dissipation device. 3 . The heat dissipation system of the enclosed wavelength conversion device according to claim 1 , wherein a first flap is arranged inside the water storage device. 4 . 4. The heat dissipation system of the enclosed wavelength conversion device according to claim 1, wherein the system further comprises a thermoelectric refrigeration device; the thermoelectric refrigeration device comprises a relative cooling surface and a relative heating surface, and the relative cooling The surface is arranged on the outer wall of the water storage device. 5 . The heat dissipation system of an enclosed wavelength conversion device according to claim 4 , wherein the system further comprises a second heat dissipation device; and the second heat dissipation device is arranged on the opposite heating surface. 6 . 6 . The heat dissipation system of an enclosed wavelength conversion device according to claim 5 , wherein the system further comprises a second fan; the second fan is placed on one side of the second heat dissipation device. 7 . 7 . The heat dissipation system of the enclosed wavelength conversion device according to claim 1 , wherein a second flap is provided on the inner wall of the housing. 8 . 8. The heat dissipation system of the enclosed wavelength conversion device according to claim 1, wherein the heat dissipation system further comprises a cold water pipe; the cold water pipe is placed in the interlayer of the outer casing, and one end of the cold water pipe is connected to the outer casing The water inlet of the body interlayer, and the other end is connected to the water outlet of the outer shell interlayer. 9 . The heat dissipation system of the enclosed wavelength conversion device according to claim 8 , wherein the cold water pipe is curved. 10 . 10. The heat dissipation system of the enclosed wavelength conversion device according to claim 1, characterized in that, the heat dissipation system further comprises a second cold water pipe placed in the first heat dissipation device and connected to the second Between the water pipes, the second water pipe is divided into a first sub-water pipe and a second sub-water pipe; the water inlet of the first sub-water pipe is the water inlet of the second water pipe, and the water outlet of the first sub-water pipe is connected to One end of the second cold water pipe, and the other end of the second cold water pipe are connected to the water inlet of the second sub-water pipe, and the water outlet of the second sub-water pipe is the water outlet of the second water pipe. 11. The heat dissipation system of the enclosed wavelength conversion device according to claim 10, wherein the first heat dissipation device is composed of a plurality of parallel fins; the second cold water pipe is parallel to the plurality of fins. Placed fin connections. 12. A laser display system, comprising a wavelength conversion device, characterized in that it comprises a heat dissipation system of the enclosed wavelength conversion device according to any one of claims 1-11.