CN209842321U - Laser light source, projection equipment and cooling assembly thereof - Google Patents

Abstract

The utility model discloses a laser light source, a projection device and a cooling component thereof, wherein the cooling component comprises a water pump (6), and the water pump (6) is provided with a water pump liquid outlet (8) and a water pump liquid inlet (7); the liquid storage tank (1) is provided with a liquid storage tank liquid outlet structure (2) and a liquid storage tank liquid inlet (3), one end of the liquid storage tank liquid outlet structure (2) is communicated with the water pump liquid inlet (7), and the other end of the liquid storage tank liquid outlet structure (2) extends into the liquid storage tank (1) and is positioned in a liquid immersion area of the liquid storage tank (1); the liquid immersion area of the liquid storage tank (1) is an area where the liquid storage tank (1) is placed at an arbitrary angle and liquid remains when a minimum predetermined amount of liquid is stored in the liquid storage tank (1). The utility model provides a cooling module can cool off the projector that arbitrary angle was placed.

Description

Laser light source, projection equipment and cooling assembly thereof

Technical Field

The utility model relates to a projection equipment technical field, in particular to laser light source, projection equipment and cooling module thereof.

Background

The rapid development of the film industry pushes continuous iteration of projection equipment, meanwhile, the field of engineering projection is also rapidly improved, high-brightness display of an ultra-large screen becomes a necessary trend, and the brightness and power consumption of a projector are continuously improved.

The light source in the traditional low-brightness projector is a xenon lamp bulb, the power of an image processing original piece is low, the heating density of a chip is not high, therefore, an air-cooling heat dissipation mode is adopted, the heat dissipation area is enlarged through heat dissipation fins, and the heat inside the projector is conveyed to the external environment by using a fan. With the improvement of brightness demand, the xenon lamp light source cannot meet the use demand of new products due to the defects of low brightness, short service life, low luminous efficiency and the like. The semiconductor laser becomes a preferred alternative light source, the light source has the advantages of small volume, long service life, high brightness, high color saturation and the like, the film viewing effect can be obviously improved, and the light source is widely applied to the fields of cinema and engineering projection. However, since the laser light source has high power consumption density and low operating temperature, it is necessary to achieve efficient heat dissipation in a small space, and the energy density of the image processing device has also been greatly increased, so that it is necessary to solve the heat dissipation problem of the projection apparatus by using an efficient liquid cooling method.

In the field of engineering projection, a high-brightness projector is required to be used for displaying wide pictures in complex environments such as parks, buildings, markets and the like, and the shapes, positions and orientation angles of screens are different, so that the liquid-cooled projector can be placed at any angle, and a liquid cooling system can work normally.

Therefore, how to realize cooling when the cooling device is placed at any angle is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a cooling module to realize the cooling when arbitrary angle is placed. The utility model also provides a laser source and projection equipment of having above-mentioned cooling module.

In order to achieve the above object, the utility model provides a following technical scheme:

a cooling assembly, comprising:

the water pump is provided with a water pump liquid outlet and a water pump liquid inlet;

the liquid storage tank is provided with a liquid storage tank liquid outlet structure and a liquid storage tank liquid inlet, one end of the liquid storage tank liquid outlet structure is communicated with the water pump liquid inlet, and the other end of the liquid storage tank liquid outlet structure extends into the liquid storage tank and is positioned in a liquid immersion area of the liquid storage tank;

the liquid immersion area of the tank is an area where the tank is placed at an arbitrary angle and where liquid remains when a minimum predetermined amount of liquid is stored in the tank.

Preferably, in the cooling module, the other end of the liquid outlet structure of the liquid storage tank is located in a central region of the liquid storage tank.

Preferably, among the above-mentioned cooling module, the other end of liquid reserve tank liquid outlet structure has the extension pipeline, the extension pipeline is kept away from the one end of liquid reserve tank liquid outlet structure is located the inside bottom of liquid reserve tank.

Preferably, in the cooling assembly, the extension pipe includes a first elbow and a second elbow capable of rotating 360 degrees, one end of the first elbow is connected to the main structure of the liquid outlet structure of the liquid storage tank, and the other end of the first elbow faces the inner bottom of the liquid storage tank and is communicated with one end of the second elbow;

the second elbow is positioned at the bottom of the interior of the liquid storage tank, and the liquid flow direction of the other end of the second elbow is parallel to the bottom surface of the interior of the liquid storage tank.

Preferably, in the above cooling module, the extension line includes:

one end of the flexible pipe is connected with the main body structure of the liquid outlet structure of the liquid storage tank;

and the counterweight joint is arranged at the other end of the flexible pipe.

Preferably, in the cooling module, the liquid storage tank is provided with a liquid injection port and a sealing sleeve for sealing the liquid injection port.

Preferably, in the above-mentioned cooling module, the inside of liquid reserve tank is provided with the baffle, the baffle is close to the other end of liquid reserve tank liquid outlet structure just blocks and is getting into in the rivers of liquid reserve tank liquid outlet structure.

Preferably, in the cooling assembly, the liquid outlet of the liquid storage tank is a U-shaped pipeline, and includes a first pipe section, a second pipe section and a third pipe section, which are connected in sequence, the first pipe section extends into the liquid storage tank, and the second pipe section and the third pipe section are arranged along the outer wall of the liquid storage tank.

Preferably, the cooling module further comprises a support member for fixing the water pump and the liquid storage tank;

the support member is a vibration reduction support member.

The utility model also provides a laser light source, including the light source, still including being used for right the light source carries out radiating cooling module, cooling module is as above-mentioned arbitrary cooling module.

The utility model also provides a projection equipment, including treating the radiating part, still include as above-mentioned arbitrary cooling module, treat the liquid outlet of radiating part with the liquid reserve tank inlet intercommunication, treat the inlet of radiating part with water pump liquid outlet intercommunication.

Preferably, in the above cooling module, the number of the cooling module is one;

or the number of the cooling assemblies is multiple and is connected in parallel or in series.

According to the above technical scheme, the utility model provides a cooling module, still have the region of liquid when still storing minimum predetermined liquid volume in liquid reserve tank and the liquid reserve tank for using arbitrary angle to place the liquid reserve tank in the liquid reserve tank, and the other end of liquid reserve tank liquid outlet structure stretches into the inside of liquid reserve tank and is located the liquid submergence region of liquid reserve tank, thereby guarantee that the liquid reserve tank is no matter placed with any angle, the terminal surface of the other end of liquid reserve tank liquid outlet structure is by the liquid submergence in the liquid reserve tank all the time, so that the liquid of the inside of messenger's liquid reserve tank reachs the water pump inlet through liquid reserve tank liquid outlet structure, ensure that the water pump has liquid to get into all the time, prevent the water pump idle running and treat the unable condition. Through the arrangement, the requirement of multi-angle installation can be met, so that the cooling effect of any angle can be realized.

The utility model also provides a laser source and projection equipment, include as above-mentioned cooling module. Since the cooling assembly has the above technical effects, the projection apparatus having the cooling assembly should also have the same technical effects, and a description thereof is omitted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic front view of a cooling module according to an embodiment of the present invention;

fig. 2 is a schematic top view of a cooling module according to an embodiment of the present invention;

fig. 3 is a schematic view of a first structure of an extension pipeline according to an embodiment of the present invention;

fig. 4 is a schematic view of a second structure of an extension pipeline according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a water pump according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a ring fastener according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a pagoda joint according to an embodiment of the present invention.

Detailed Description

The utility model discloses a cooling assembly to realize the cooling when arbitrary angle is placed. The utility model also provides a laser source and projection equipment of having above-mentioned cooling module.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 2, an embodiment of the present invention provides a cooling assembly, including a water pump 6 and a liquid storage tank 1, wherein the water pump 6 has a water pump liquid outlet 8 and a water pump liquid inlet 7; the liquid storage tank 1 is provided with a liquid storage tank liquid outlet structure 2 and a liquid storage tank liquid inlet 3, one end of the liquid storage tank liquid outlet structure 2 is communicated with a water pump liquid inlet 7, and the other end of the liquid storage tank liquid outlet structure 2 extends into the liquid storage tank 1 and is positioned in a liquid immersion area of the liquid storage tank 1; the liquid immersion area of the liquid storage tank 1 is an area where the liquid storage tank 1 is placed at an arbitrary angle and liquid remains when a minimum predetermined amount of liquid is stored in the liquid storage tank 1.

The embodiment of the utility model provides a cooling module, still have the region of liquid when storing minimum predetermined liquid volume in 1 and the liquid reserve tank 1 for placing the liquid reserve tank 1 and the liquid reserve tank 1 with arbitrary angle because the liquid submergence region of liquid reserve tank 1, and the other end of liquid reserve tank liquid outlet structure 2 stretches into the inside of liquid reserve tank 1 and is located the liquid submergence region of liquid reserve tank 1, thereby guarantee that liquid reserve tank 1 no matter places with any angle, the terminal surface of the other end of liquid reserve tank liquid outlet structure 2 is by the liquid submergence in liquid reserve tank 1 all the time, so that the liquid of the inside of liquid reserve tank 1 reachs water pump inlet 7 through liquid reserve tank liquid outlet structure 2, ensure that water pump 6 has the liquid to get into all the time, prevent the condition that water pump 6 idles and. Through the arrangement, the requirement of multi-angle installation can be met, so that the cooling effect of any angle can be realized.

It can be understood that the relative position of the water pump 6 and the liquid storage tank 1 is not limited to the structure shown in fig. 1 and 2, and may be other positions, and it is only necessary to ensure that one end of the liquid storage tank outlet structure 2 is communicated with the water pump inlet 7, and the water pump 6 can smoothly suck water from the liquid storage tank 1.

The liquid working medium in the cooling assembly can adopt deionized water or antifreeze containing ethylene glycol and other solutes, has better heat exchange property, and can prevent the occurrence of oxidation corrosion of devices.

As shown in fig. 1 and 2, the other end of the tank outlet structure 2 is located in the central region of the tank 1. Wherein, the central region of the liquid storage tank 1 is the center of the liquid storage tank 1 and covers the liquid volume central point when the liquid storage tank 1 is filled with liquid. Through the arrangement, only one half of the liquid storage tank 1 with the minimum stored predetermined liquid amount is required to be larger than the half of the liquid storage tank 1 with the maximum stored predetermined liquid amount (the liquid storage tank 1 is full of the liquid), so that the end face of the other end of the liquid storage tank liquid outlet structure 2 can be always immersed by the liquid in the liquid storage tank 1, and the cooling effect of any angle is ensured. Preferably, in order to ensure that the other end of the tank outlet configuration 2 is always submerged, it is necessary to ensure that the water level of the tank 1 is not less than 80% of its maximum level, i.e. the minimum predetermined amount of liquid stored is not less than 80% of the maximum predetermined amount of liquid stored.

Also can set up to other structures, the other end of liquid reserve tank liquid outlet structure 2 has the extension pipeline, and the one end that liquid reserve tank liquid outlet structure 2 was kept away from to the extension pipeline is located the inside bottom of liquid reserve tank 1. Through setting up the extension pipeline for the other end of liquid reserve tank liquid outlet structure 2 is the one end that the extension pipeline is located the inside bottom of liquid reserve tank 1 promptly, so that it is half when guaranteeing to store minimum predetermined liquid volume in the liquid reserve tank 11 and be less than or equal to store the biggest predetermined liquid volume in the liquid reserve tank 1 (the inside of liquid reserve tank 1 is full), also can realize the terminal surface of the other end of liquid reserve tank liquid outlet structure 2 and be the effect of the liquid submergence in the liquid reserve tank 1 all the time.

As shown in fig. 3, in the first embodiment, the extension pipe comprises a first elbow 10 and a second elbow 11 capable of rotating 360 degrees, one end of the first elbow 10 is connected with the main structure of the liquid outlet structure 2 of the liquid storage tank, and the other end of the first elbow 10 faces the inner bottom of the liquid storage tank 1 and is communicated with one end of the second elbow 11; the second bend 11 is located at the inner bottom of the reservoir 1 and the flow direction at the other end is parallel to the inner bottom of the reservoir 1. Through the above-mentioned extension pipeline, can prolong the other end of liquid reserve tank liquid outlet structure 2 to the inside of liquid reserve tank 1 (i.e. the other end of second elbow 11). And, the liquid flow direction of the other end of the second elbow 11 is parallel to the inner bottom surface of the liquid storage tank 1, thereby effectively facilitating the flow of liquid flow and ensuring the uniformity of liquid inlet.

In a second embodiment, as shown in fig. 4, the extension line comprises: a flexible pipe 12 with one end connected with the main structure of the liquid outlet structure 2 of the liquid storage tank; and the counterweight joint 13 is arranged at the other end of the flexible pipe 12, and a liquid inlet is required to be arranged on the counterweight joint so as to ensure that liquid can enter the flexible pipe. The counter weight joint 13 drives the flexible pipe 12 to move under the action of gravity, and even when the liquid storage tank 1 is rocked, the other end of the flexible pipe 12 can be ensured to be positioned at the bottom of the inside of the liquid storage tank 1, and then the liquid inlet effect of the water pump 6 is ensured.

In order to facilitate the water injection of the liquid storage tank 1, the liquid storage tank 1 is provided with a liquid injection port 5 and a sealing sleeve for sealing the liquid injection port 5. In this embodiment, when the liquid storage tank 1 is placed at the most commonly used placement position, the top of the liquid storage tank is provided with a liquid injection port 5, liquid can be filled when a part of the projection apparatus to be cooled is in initial operation or is in a liquid shortage state, and a sealing sleeve needs to be placed at the position after liquid filling to prevent liquid inside the liquid storage tank 1 from leaking when the liquid storage tank is inverted. The sealing sleeve can be a sealing rubber sleeve or a sealing sleeve made of other materials, and is not repeated one by one and is within a protection range.

Because the flow velocity of the liquid in the liquid storage tank 1 is high, vortex is easily formed between the port at the other end of the liquid storage tank liquid outlet structure 2 and the liquid storage tank liquid inlet 3, so that gas continuously enters a liquid heat dissipation loop, and the heat dissipation efficiency is reduced; moreover, if the working medium of the water pump 6 contains gas for a long time, the impeller of the water pump 6 is subjected to cavitation erosion, the impeller is damaged, the working stability of the impeller is seriously affected, and the working performance and the service life of the water pump 6 are also affected. To avoid this, a baffle 4 is arranged in the middle of the reservoir 1 at a position corresponding to the port at the other end of the reservoir outlet structure 2. That is, the inside of the liquid storage tank 1 is provided with a baffle 4, and the baffle 4 is close to the other end of the liquid storage tank liquid outlet structure 2. And the baffle 4 is blocked in the flow of water entering the reservoir outlet structure 2. Through setting up baffle 4, and make it block in the rivers that get into liquid reserve tank liquid outlet structure 2, its effect is the physical space of restriction liquid reserve tank 1 to liquid reserve tank liquid outlet structure 2, prevent that liquid flow from forming the vortex at the other end of liquid reserve tank liquid outlet structure 2 when great, destroy the vortex, make liquid can both flow smoothly when the arbitrary direction of liquid reserve tank 1 is fixed, satisfy the requirement that projection equipment multi-angle was used, and, effectively avoid the too high phenomenon of air content in the flow path, improve water pump 6's stability, reinforcing heat transfer effect.

The baffle 4 is preferably fixed to one face of the interior of the tank 1 by welding.

In this embodiment, liquid storage tank liquid outlet structure 2 is the U-shaped pipeline, and it includes first pipeline section, second pipeline section and the third pipeline section that connects gradually, and 1 inside of liquid storage tank is stretched into to first pipeline section, and the outer wall setting of liquid storage tank 1 is followed to second pipeline section and third pipeline section. Through setting up liquid storage tank liquid outlet structure 2 into U-shaped pipeline, effectively improved the stability that liquid storage tank liquid outlet structure 2 is fixed in on the liquid storage tank 1 to improve compact structure nature. Of course, the liquid outlet structure 2 of the liquid storage tank may be a straight pipeline or an L-shaped pipeline, which will not be described in detail herein.

The embodiment of the utility model provides an among the cooling module, still including the support piece that is used for fixed water pump 6 and liquid reserve tank 1.

Wherein, water pump 6 and liquid reserve tank 1 are fixed in on the support piece to in as a whole with water pump 6 and water tank 1 integration, make the installation more convenient, the structure is compacter.

As shown in fig. 1 and 2, the liquid outlet structure 2 of the liquid storage tank is connected with the liquid outlet 8 of the water pump through a connecting pipeline 9. Wherein, the internal diameter of other liquid pipelines in connecting line 9 and the cooling module need be greater than or equal to 5mm to reduce the pressure loss of pipeline department, thereby reduced the pipeline resistance. After the liquid pipeline (the connecting pipeline 9 and other liquid pipelines in the cooling assembly) is connected with the joints of all devices (the liquid storage tank 1, the water pump 6 and the parts to be cooled of the projection equipment), the liquid pipeline can be fastened and sealed by using the hose clamp, so that liquid leakage is prevented.

Further, the support is a vibration reduction support, and through the arrangement, the water pump 6 is prevented from generating excessive noise due to vibration during operation; moreover, the vibration of the projection equipment (projector) in the transportation process is prevented from causing the structural parts of the liquid storage tank 1 and the water pump 6 to be loosened, and the stability of the equipment is effectively ensured.

In this embodiment, the fixed stabilizer blade of water pump 6 is soft rubber material, is provided with the rubber pad between screw and the support piece screw hole, places the foaming silica gel pad between the contact surface of liquid reserve tank 1 and support piece to play effective damping effect. Wherein, the material of support piece body is panel beating or aluminium, easily bends and digs machining steps such as hole, can guarantee mechanical strength simultaneously, reduces cooling module's whole weight.

Of course, the support member may be directly made of a vibration damping material (rubber, resin, or the like). The material of the fixing support legs of the water pump and other vibration damping materials is not limited to soft rubber, and other materials with good vibration damping effect can be used.

As shown in fig. 5 and 6, the cooling module according to the embodiment of the present invention further includes a ring-shaped fixing member 14, and the water pump 6 is fixed on the supporting member through the ring-shaped fixing member 14; the outer wall of the water pump 6 is in contact with the inner annular wall of the annular fixture 14. Through the arrangement, the fixing stability of the water pump 6 is effectively improved, and the water pump 6 is conveniently fixed on the supporting piece.

Further, as shown in fig. 7, at least one of the water pump outlet 8, the water pump inlet 7, the end of the liquid storage tank outlet structure 2 and the liquid storage tank inlet 3 is provided with a pagoda connector 15.

Preferably, the pagoda joint 15 is a threaded pagoda joint. Namely, the interface is provided with a thread, and the thread can fix the pagoda joint and realize the quick airtight connection with the pipeline.

Of course, the connection form between the interface and the pagoda joint 15 is not limited to the thread form, and the interface and the pagoda joint 15 may be an integral structure, a snap connection, an interference fit, or the like. Taking the water pump 6 as an example, the water pump 6 is provided with an integrated pagoda joint. Wherein, need to guarantee that the water pump inlet 7 of water pump 6 is the same with the size of the tip of the liquid reserve tank outlet structure 2 of water tank 6 to conveniently use the unchangeable connecting line 9 of cross section to connect.

In this embodiment, the material of the pagoda joint 15 may be metal or plastic, and the outer diameter of the pagoda joint 15 needs to be slightly larger than the inner diameter of the pipeline to ensure interference fit. In addition, in the embodiment where the pagoda joint 15 is a threaded pagoda joint, a rubber gasket is required to be placed inside the threads of the pagoda joint 15 to prevent liquid leakage.

Preferably, the water pump 6 is a small high pressure head direct drive pump driven by a brushless dc motor, i.e. the water pump 6 is a brushless dc water pump having inlet and outlet fluid ports (i.e. a water pump outlet 8 and a water pump inlet 7).

The water pump 6 may also be other types of water pumps, such as an ac pump, a piston pump, or a gear pump.

Moreover, the liquid storage tank 1 is preferably formed by welding or bending a metal plate such as aluminum or a metal plate, so that the operations of processing, bending and integral welding of the internal structure are facilitated. And the processes of die sinking injection molding, aluminum profile stretching and the like can also be adopted.

The utility model also provides a laser light source, including the light source, still including being used for right the light source carries out radiating cooling module, and cooling module is as above-mentioned any kind of cooling module. Wherein, can treat the heat dissipation part at light source setting all around to dispel the heat to it by cooling module, also can set up the heat dissipation runner on the body of light source, so that cooling module directly dispels the heat to the light source.

The utility model also provides a projection equipment, including treating the radiating part, still include as above-mentioned any one kind of cooling module, treat the liquid outlet and the 3 intercommunications of liquid reserve tank inlet of radiating part, treat the inlet and the 8 intercommunications of water pump liquid outlet of radiating part.

The part to be radiated can be an air-liquid heat exchanger, a filter or a water cooling plate and other equipment.

And the parts to be cooled and the cooling assembly are mutually assembled, so that the good sealing of each joint is ensured. Before the projection equipment operates, liquid working medium needs to be filled into the liquid storage tank 1, and the water pump 6 is started to enable the liquid working medium to be filled in all parts in a circulating mode. If the water level is too low in the circulation process, liquid needs to be replenished in real time until the working medium is stably circulated, and the liquid level is not changed any more. In the system operation process, liquid gets into the entry of water pump 6 through the pressure differential effect that water pump 6 formed in liquid reserve tank 1, water pump 6 is liquid pressure boost through the high-speed rotation of impeller, high-pressure liquid gets into wind-liquid heat exchanger (the first part of waiting to dispel the heat), here air and liquid have independent route respectively, heat exchange takes place through metal water course and fin, thereby reduce the temperature of liquid, low-temperature liquid flows through the water-cooling board (the second part of waiting to dispel the heat) of heating device department afterwards, absorb the heat of laser source and image processing equipment department, for its cooling, liquid temperature risees afterwards, and get into liquid reserve tank 1 through liquid reserve tank inlet 3 of liquid reserve tank 1, accomplish a circulation.

The utility model provides a projection equipment can realize the cooling operation of arbitrary angle, makes projection equipment (projector) can adapt to the use of complicated scene, has improved projection equipment's working property. The problem that the liquid cooling system cannot be installed at multiple angles and has high use failure rate in the existing cinema and engineering projectors is effectively solved.

The method is particularly suitable for high-power laser projection display equipment.

Further, the number of the cooling assemblies is plural and is connected in parallel or in series. Through the arrangement, the working medium flow of the system is effectively improved, and the heat exchange performance is enhanced.

Of course, only one cooling assembly may be provided in the projection apparatus to simplify the structure of the projection apparatus.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. A cooling assembly, comprising:

the water pump (6), the said water pump (6) has water pump outlet (8) and water pump inlet (7);

the liquid storage tank (1) is provided with a liquid storage tank liquid outlet structure (2) and a liquid storage tank liquid inlet (3), one end of the liquid storage tank liquid outlet structure (2) is communicated with the water pump liquid inlet (7), and the other end of the liquid storage tank liquid outlet structure (2) extends into the liquid storage tank (1) and is positioned in a liquid immersion area of the liquid storage tank (1);

the liquid immersion area of the liquid storage tank (1) is an area where the liquid storage tank (1) is placed at an arbitrary angle and liquid remains when a minimum predetermined amount of liquid is stored in the liquid storage tank (1).

2. A cooling assembly according to claim 1, wherein the other end of the tank outlet configuration (2) is located in a central region of the tank (1).

3. A cooling assembly according to claim 1, wherein the other end of the tank outlet structure (2) is provided with an extension line, and the end of the extension line remote from the tank outlet structure (2) is located at the inner bottom of the tank (1).

4. A cooling assembly according to claim 3, wherein the extension pipe comprises a first bend (10) and a second bend (11) capable of 360 ° rotation, one end of the first bend (10) is connected with the main structure of the liquid outlet structure (2) of the liquid storage tank, and the other end of the first bend (10) faces the inner bottom of the liquid storage tank (1) and is communicated with one end of the second bend (11);

the second elbow (11) is positioned at the inner bottom of the liquid storage tank (1), and the liquid flow direction of the other end of the second elbow is parallel to the inner bottom surface of the liquid storage tank (1);

or, the extension line includes:

a flexible pipe (12) with one end connected with the main body structure of the liquid outlet structure (2) of the liquid storage tank;

and the counterweight joint (13) is arranged at the other end of the flexible pipe (12).

5. A cooling module according to claim 1, characterized in that the tank (1) is provided with a liquid injection opening (5) and a sealing sleeve for sealing the liquid injection opening (5).

6. A cooling assembly according to claim 1, wherein the interior of the tank (1) is provided with a baffle (4), said baffle (4) being located close to the other end of the tank outlet structure (2) and being blocked in the flow of water entering the tank outlet structure (2).

7. A cooling assembly according to claim 1, wherein the tank outlet structure (2) is a U-shaped pipe comprising a first pipe section, a second pipe section and a third pipe section connected in series, the first pipe section extending into the interior of the tank (1), the second pipe section and the third pipe section being arranged along the outer wall of the tank (1).

8. A cooling assembly according to any one of claims 1-7, further comprising a support for securing the water pump (6) and the tank (1);

the support member is a vibration reduction support member.

9. A laser light source comprising a light source and further comprising a cooling assembly for dissipating heat from the light source, the cooling assembly being as claimed in any one of claims 1 to 8.

10. A projection apparatus comprising a member to be heat-dissipated, further comprising a cooling assembly as claimed in any one of claims 1 to 8, wherein the liquid outlet of the member to be heat-dissipated is communicated with the liquid inlet (3) of the liquid storage tank, and the liquid inlet of the member to be heat-dissipated is communicated with the liquid outlet (8) of the water pump.

11. The projection device of claim 10, wherein the number of cooling assemblies is one;

or the number of the cooling assemblies is multiple and is connected in parallel or in series.