CN112764302A

CN112764302A - Light processing projector

Info

Publication number: CN112764302A
Application number: CN201911072881.7A
Authority: CN
Inventors: 张琰; 田新团
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2021-05-07

Abstract

The invention provides a light processing projector, which comprises a cooling assembly, wherein the cooling assembly comprises a liquid cooling head, a heat exchanger and a pipeline. The pipeline is including going out liquid pipeline and backflow pipeline, the liquid pipeline has the first vertical section of vertical extension, the liquid outlet of liquid cold head is connected to the lower extreme of this first vertical section, the upper end of this first vertical section upwards surpasss the heat exchanger, backflow pipeline has the vertical second section of vertical extension, the lower extreme of this vertical section of second is backflow pipeline's minimum, the upper end of this vertical section of second upwards connects the inlet of liquid cold head, coolant liquid flows to the heat exchanger along first slope section under the action of gravity, and make full use of the flow of gravity drive coolant liquid, make the heat that has absorbed light source device and the coolant liquid that heaies up flow more smoothly, in addition, the coolant liquid of being convenient for through first vertical section and the vertical section of second upwards flows, thereby reduce the flow resistance of liquid pipeline to the coolant liquid.

Description

Light processing projector

Technical Field

The invention relates to the technical field of projectors, in particular to a light processing projector.

Background

The light processing projector is mainly used for projection, and other functional components can be matched to enable the light processing projector to have corresponding functions, wherein the light processing projector can integrate a laser display technology, so that the colors displayed by the light processing projector are more vivid, and the color gamut coverage rate can reach 90% of the color gamut range of human eyes.

The core component of the laser display technology is a light source device, and the light source device needs to maintain the working temperature in the working state. In the related art, the light source device is used as a main heat source of the light processing projector, and the temperature of the peripheral side of the light source device is reduced by a cooling assembly to maintain the working temperature of the light source device, wherein the pipes in the cooling assembly level with the convection liquid cooling head and the heat exchanger, but the cooling liquid in the pipes flows slowly.

Disclosure of Invention

The invention aims to provide a light processing projector, which solves the problem that the cooling liquid of a cooling assembly in the prior art flows slowly.

In order to solve the technical problems, the invention adopts the following technical scheme:

according to one aspect of the present invention, there is provided a light processing projector comprising: the cooling assembly comprises a liquid cooling head, a heat exchanger and a pipeline; the liquid cooling head is used for exchanging heat with the light source device to absorb heat emitted by the light source device; the heat exchanger is connected with the liquid cooling head through a pipeline to form a cooling liquid circulating channel together; the pipe includes: the liquid outlet pipeline is communicated with a liquid outlet of the liquid cooling head and a liquid inlet of the heat exchanger; the liquid outlet pipeline is provided with a first vertical section which extends vertically, the lower end of the first vertical section is connected with a liquid outlet of the liquid cooling head, and the upper end of the first vertical section upwards exceeds the heat exchanger; the backflow pipeline is communicated with the liquid inlet of the liquid cooling head and the liquid outlet of the heat exchanger; the backflow pipeline is provided with a second vertical section which extends vertically, the lower end of the second vertical section is the lowest point of the backflow pipeline, and the upper end of the second vertical section is upwards connected with the liquid inlet of the liquid cooling head.

Optionally, the liquid outlet pipeline is further provided with a first inclined section, and the first inclined section is connected with the heat exchanger in an inclined and downward manner from the upper end of the first vertical section; the return pipe is also provided with a second inclined section which is connected with the lower end of the second vertical section from the upper end of the second inclined section downwards in an inclined mode.

Optionally, the slope of the first inclined section relative to the horizontal plane is 1-10 degrees; the slope of the second inclined section relative to the horizontal plane is 1-10 degrees.

Optionally, the total length of the liquid outlet pipe is greater than the total length of the return pipe.

Optionally, the cooling assembly further includes a temperature raising device disposed around the liquid outlet pipe and configured to raise a temperature of the cooling liquid flowing through the liquid outlet pipe.

Optionally, the cooling assembly further comprises a cooling device, the cooling device is arranged on the periphery of the backflow pipeline and cools the cooling liquid flowing through the backflow pipeline.

Optionally, the cooling assembly further comprises: the temperature rising device is arranged on the periphery of the liquid outlet pipeline and used for rising the temperature of the cooling liquid flowing through the liquid outlet pipeline; and the cooling device is arranged on the peripheral side of the return pipeline and cools the cooling liquid flowing through the return pipeline.

Optionally, the light processing projector further includes a temperature detection unit, and the temperature detection unit is disposed at the liquid inlet of the liquid cooling head, the liquid outlet of the liquid cooling head, the liquid cooling bar, or the light source device to detect corresponding temperatures.

Optionally, the system further comprises a heat concentration module; the light source devices are conducted and converged on the heat concentration module, and concentrate heat on the heat concentration module.

According to the technical scheme, the invention has at least the following advantages and positive effects:

the cooling assembly is used for cooling the light source device, cooling liquid is arranged in the cooling assembly, and the cooling liquid flows in the cooling assembly in a self-circulation mode under the action of gravity and in combination with density difference and takes away heat generated by the light source device. Since the temperature affects the density of the cooling liquid, the density of the cooling liquid heated by absorbing the heat of the light source device is lower than that of the other cooling liquid, so that the cooling liquid heated by absorbing the heat of the light source device floats on the surface of the other cooling liquid and is lifted by the other cooling liquid.

The cooling liquid which absorbs the heat of the light source device and is heated flows under the action of gravity, and the potential energy of the cooling liquid is converted into kinetic energy to provide power for cooling liquid circulation, so that the cooling liquid which absorbs the heat of the light source device and is heated circularly flows under the condition that a pump is not required to supply driving force, the cooling liquid in the cooling assembly can realize self circulation, and the heat emitted by a heat source is taken away. The cooling assembly realizes the circulating flow of the cooling liquid based on the density difference and potential energy conversion of the cooling liquid, so that the cooling assembly realizes the self-circulation of the cooling liquid under the condition that a pump is not required to be installed, extra electronic devices are not required to be added, the noise of the cooling assembly is reduced, and the reliability of the cooling assembly is improved.

In addition, the pipeline includes liquid outlet pipeline and backflow pipeline, the liquid outlet pipeline has the first vertical section of vertical extension, the liquid outlet of liquid cooling head is connected to the lower extreme of this first vertical section, the upper end of this first vertical section upwards surpasss the heat exchanger, the backflow pipeline has the second vertical section of vertical extension, the lower extreme of this second vertical section is the minimum of backflow pipeline, the upper end of this second vertical section upwards connects the inlet of liquid cooling head, coolant liquid flows to the heat exchanger along first slope section under the action of gravity, and make full use of gravity drive coolant liquid's flow, make the coolant liquid that has absorbed the heat of light source device and has risen temperature more smooth flow, in addition, be convenient for coolant liquid to upwards flow through first vertical section and second vertical section, thereby reduce the flow resistance of liquid outlet pipeline to coolant liquid

Drawings

Fig. 1 is a perspective view of a light processing projector of the present invention.

Fig. 2 is a front view of the light processing projector of the present invention.

Fig. 3 is an exploded view of the light processing projector of the present invention.

Fig. 4 is an imaging schematic diagram of a light processing projector of the present invention.

Fig. 5 is a connection diagram of a heat concentrating module of the light processing projector of the present invention.

Fig. 6 is a block diagram of a cooling module of the light processing projector of the present invention.

Fig. 7 is a block diagram of a cooling module in accordance with another embodiment of the light processing projector of the present invention.

Fig. 8 is a structural view of a liquid cooling head of the optical processing projector of the present invention.

Fig. 9 is a connection diagram of a thermally conductive layer of a light management projector of the present invention.

FIG. 10 is an internal structure view of a liquid cooling head of the optical processing projector according to the present invention.

Fig. 11 is a front view of a liquid cooling head of the optical processing projector of the present invention.

Fig. 12 is a front view of a second fin of the light processing projector of the present invention.

Fig. 13 is a front view of a heat exchanger of the light processing projector of the present invention.

Fig. 14 is a top view of a heat exchanger of the light processing projector of the present invention.

Fig. 15 is a perspective view of a heat exchanger of the light processing projector of the present invention.

Fig. 16 is a block diagram of a duct in another embodiment of the light processing projector of the present invention.

Fig. 17 is a flow chart of air flow in the ventilation passage of the light processing projector of the present invention.

Fig. 18 is a flow diagram of air flow in the cooling assembly of another embodiment of the light processing projector of the present invention.

FIG. 19 is a schematic diagram of a telescopic module of the optical processing projector according to the present invention.

FIG. 20 is a partial view of the telescopic module of the optical processing projector according to the present invention.

FIG. 21 is a perspective view of the liquid replenishment device of the optical processing projector according to the present invention.

Fig. 22 is a structural view of a liquid replenishment device according to another embodiment of the optical processing projector of the present invention.

Fig. 23 is a connection diagram of the temperature detection unit of the light processing projector of the present invention.

The reference numerals are explained below:

100. a light processing projector;

1. a light source device;

2. an opto-mechanical device;

3. a lens;

4. a cooling assembly; 41. liquid cooling head; 41a, a serpentine channel; 411. a liquid inlet; 412. a liquid outlet; 413. a vapor tube; 4131. a copper plate; 4131a, a first copper plate; 4131b, a second copper plate; 4132. a copper pipe; 4133. a second fin; 4133a, heat dissipating fins; 4133b, via holes; 42. a pipeline; 421. a liquid outlet pipeline; 4211. a first vertical section; 4211a, a first telescopic pipe; 4211b, a first central shaft; 4211c, a first regulating tube; 4212. a first inclined section; 422. a return line; 4221. a second vertical section; 4221a, a second telescopic pipe; 4221b, a second central shaft; 4221c, a second regulating tube; 4222. a second inclined section; 423. a ventilation channel; 4231. enclosing plates; 4232. a second fan; 424. a telescopic module; 4241. a support; 4242. a track; 4243. a slider; 4243a, a connecting shaft; 43. a heat exchanger; 431. liquid cooling and discharging; 4311. an inlet pipe; 4312. an outlet pipe; 4313. a first fin; 432. a fan; 44. a heat conductive layer; 45. an exhaust valve; 46. a temperature raising device; 47. a cooling device; 48. a liquid supplementing device; 481. a liquid storage cavity; 482. a notch; 483. a cover plate; 4831. air holes are formed; 49. a temperature detection unit;

5. a housing; 51. an upper shell; 52. a lower case;

6. a central control system;

7. and a heat concentration module.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

Fig. 1 is a perspective view of a light processing projector 100 of the present invention. Fig. 2 is a front view of the light processing projector 100 of the present invention. Fig. 3 is an exploded view of the light processing projector 100 of the present invention. Fig. 4 is an imaging schematic diagram of the light processing projector 100 of the present invention.

Referring to fig. 1 to 4, the present invention provides a light processing projector 100. Light processing projector 100 may alternatively be a projector. The optical processing projector 100 can be an independent projector, and other functional components can be also matched, so that the optical processing projector 100 has corresponding functions. The following takes a projector integrated with laser display technology as an example to describe the solution of the present invention.

In the related art, the cooling module drives the circulation of the cooling liquid by a pump, and realizes the circulation of the cooling liquid, and the cooling liquid absorbing the heat of the peripheral side of the laser device is cooled by a fan to flow back to the vicinity of the laser device. Because the pump and the fan belong to electronic devices and are used as main components of the cooling assembly, the light processing projector utilizes the pump to drive the circulating flow of the cooling liquid, is in a working state for a long time and generates certain noise, the reliability of the cooling assembly is reduced, and the reliability of the light processing projector is further reduced.

The light processing projector 100 provided by the invention mainly comprises a light source device 1, an optical mechanical device 2, a lens 3, a cooling component 4 and a shell 5. The housing 5 includes an upper case 51 and a lower case 52 mounted on the upper case 51, and the upper case 51 and the lower case 52 form a receiving space for receiving the light source device 1, the optical device 2, the lens 3, and the cooling unit 4.

The light source device 1 is used as a main heat source of the light processing projector 100, and the light source device 1 emits a laser light source to the outside under the control of a central control system 6 of the light processing projector 100, wherein the central control system 6 of the light processing projector 100 adjusts the emitting direction of the light source device 1 through a command. The light source device 1 mainly includes a laser member (not shown) and a reflecting member (not shown) that reflects a laser light source generated by the laser member.

The blue light emitted by the light source device 1 diffracts yellow light, green light and blue light in the shaping process, and acts on the optical device 2. The laser light source generated by the light source device 1 includes yellow light, green light and blue light, which is not limited herein. The yellow light, the green light and the blue light are emitted to the optical device 2, received by the optical device 2, and output the image light beam under the mixed modulation of the optical device 2. Specifically, the optical-mechanical device 2 is mainly an optical-mechanical device.

The lens 3 is located on the transmission path of the image beam and is used for projecting the image beam. The image beam is projected in equal proportion by the lens 3, thereby presenting a color display image.

The cooling assembly 4 is used for cooling the light source device 1, maintaining the working temperature of the laser device 1, and realizing the circulating flow of the cooling liquid based on the density difference and the potential energy conversion of the cooling liquid in the cooling assembly 4, so that the cooling assembly 4 realizes the self-circulation of the cooling liquid without installing a pump, thereby avoiding the need of additional redundant electronic devices, reducing the noise of the cooling assembly 4 and improving the reliability of the cooling assembly 4.

Alternatively, the cooling assembly 4 can also be formed as a separate component, which is externally disposed on the light processing projector 100, and performs an integral cooling process on the light processing projector 100, and maintains the normal operating temperature of the light processing projector 100, so as to improve the service life of the light processing projector 100.

Fig. 5 is a connection diagram of the heat concentrating module 7 of the light processing projector 100 of the present invention.

As shown in fig. 5, optionally, the light processing projector 100 is provided with a plurality of light source devices 1, and the visual effect exhibited by the light processing projector 100 is better through the interaction of the plurality of light source devices 1. Optionally, the light source devices 1 are located inside the light processing projector 100, and the light source devices 1 are different in position from each other, so that it is difficult to cool the light source devices 1 simultaneously. The heat emitted from a single light source device 1 is large, so that a plurality of high temperature regions formed by the light source devices 1 exist in the light processing projector 100.

Therefore, the light processing projector 100 is further provided with a heat concentrating module 7, and the heat concentrating module 7 is mainly used for concentrating heat of the plurality of light source devices 1. Concentrate the heat of a plurality of light source device 1 in the light processing projector 100 through heat concentration module 7 to realize that the heat of a plurality of light source device 1 concentrates on one in the light processing projector 100, and then realize a plurality of light source device 1 and cool down simultaneously through the cooling to heat concentration module 7, avoid the inside temperature of light processing projector 100 to be all over formula high temperature.

A heat conducting member (not shown) is disposed between the light source devices 1, the light source devices 1 are conducted through the heat conducting member and converged to the heat concentrating module 7, and the heat is concentrated to the heat concentrating module 7, so that the heat concentrating module 7 concentrates the heat of the light source devices 1, and the cooling assembly 4 is convenient to dissipate the heat concentrating module 7, thereby achieving the overall heat dissipation of the light processing projector 100. The heat dissipation mode of the cooling module 4 to the single light source device 1 is similar to the heat dissipation mode of the cooling module 4 to the heat concentration module 7, however, the difference between the heat of the single light source device 1 and the heat of the heat concentration module 7 is large, so the cooling amplitude of the cooling module 4 to the heat concentration module 7 is large, and the light source device 1 conducted to the heat concentration module 7 is guaranteed to maintain the normal working temperature.

Fig. 6 is a block diagram of the cooling unit 4 of the light processing projector 100 of the present invention.

Referring to fig. 6, the cooling module 4 includes a liquid cooling head 41, a pipe 42, and a heat exchanger 43, and the heat exchanger 43 is connected to the liquid cooling head 41 through the pipe 42 to form a cooling liquid circulation passage. The cooling liquid circulates along the cooling liquid circulation passage, and absorbs the heat of the light source device 1 to be heated and to be cooled by exchanging heat with the outside air in the heat exchanger 43. The position of the central line of the heat exchanger 43 is higher than the position of the central line of the liquid cooling head 41, and the cooling liquid cooled by the heat exchanger 43 flows into the liquid cooling head 41 from the heat exchanger 43 under the action of gravity, and is melted with the cooling liquid heated by absorbing the heat of the light source device 1 to provide power for circulation of the cooling liquid, so that the cooling liquid in the cooling assembly 4 realizes self-circulation and takes away the heat emitted by the light source device 1.

The cooling module 4 achieves self-circulation of the cooling fluid without the need for a pump, thereby eliminating the need for additional redundant electronics, reducing the noise of the cooling module 4 and improving the reliability of the cooling module 4. Specifically, the coolant may be an ethylene glycol aqueous solution, water, a propylene glycol aqueous solution, a calcium chloride solution, or the like, and has a characteristic that the density changes with a change in temperature, but is not limited thereto.

The liquid cooling head 41 is made of a heat conductive material and is mainly used for absorbing heat emitted by the light source device 1. Specifically, the liquid cooling head 41 may be made of copper or aluminum, or the heat exchanging portion may be made of copper or aluminum. The liquid cooling head 41 exchanges heat with the light source device 1 to absorb heat emitted from the light source device 1, so as to lower the temperature of the light source device 1 and maintain the operating temperature of the light source device 1.

The liquid cooling head 41 is close to the light source device 1 and on the right side of the light source device 1, but is not limited thereto. Since the liquid cooling head 41 absorbs heat emitted from the light source device 1 due to its thermal conductivity, the liquid cooling head 41 and the light source device 1 exchange heat through external air as a heat transfer medium. Optionally, the liquid cooling head 41 and the light source device 1 realize heat exchange through a heat conductor.

Fig. 7 is a block diagram of a cooling unit 4 according to another embodiment of the light processing projector 100 of the present invention. Fig. 8 is a structural diagram of the liquid cooling head 41 of the optical processing projector 100 of the present invention.

As shown in fig. 7 and 8, the liquid cooling head 41 is further disposed around the light source device 1, so that the liquid cooling head 41 can absorb the heat emitted from the light source device 1. Because the outer wall of the liquid cooling head 41 is opposite to the light source device 1, and the light source device 1 is located at the center of the liquid cooling head 41, the liquid cooling head 41 can absorb the heat emitted by the light source device 1 towards the outer wall of the light source device 1, so that the heat absorption areas of the liquid cooling head 41 and the light source device 1 are increased, and the heat absorption efficiency of the liquid cooling head 41 and the cooling efficiency of the light source device 1 are increased.

The liquid cooling head 41 has a liquid inlet 411 and a liquid outlet 412 communicated with the liquid inlet 411, the liquid outlet 412 is mainly used for discharging the cooling liquid which is heated by absorbing the heat of the light source device 1, and the liquid inlet 411 is mainly used for receiving the cooling liquid which is cooled by the heat exchanger 43. Further, a serpentine channel 41a is disposed in the liquid cooling head 41, and one end of the serpentine channel 41a is communicated with the liquid inlet 411, and the other end is communicated with the liquid outlet 412. The heat exchange path of the liquid cooling head 41 with the light source device 1 is lengthened by the serpentine channel 41a, thereby increasing the temperature of the cooling liquid at the liquid cooling head 41.

The liquid inlet 411 is located at the lower side of the liquid outlet 412, and the cooling liquid flows along the direction from the liquid inlet 411 to the liquid outlet 412, so as to realize the circulation of the cooling liquid. In addition, in the process that the cooling liquid flows to the liquid outlet 412 along the liquid inlet 411, the cooling liquid flows along the peripheral side of the light source device 1, and constantly absorbs the heat emitted by the light source device 1, thereby improving the cooling efficiency of the light source device 1.

Since the liquid inlet 411 receives the cooling liquid cooled by the heat exchanger 43 and the liquid outlet 412 of the liquid cooling head 41 discharges the cooling liquid heated by absorbing the heat of the light source apparatus 1, the cooling liquid heated by absorbing the heat of the light source apparatus 1 and the cooling liquid cooled by the heat exchanger 43 are provided in the liquid cooling head 41. Since the density of the cooling liquid is affected by the temperature, the higher the temperature, the lower the density of the cooling liquid, the density of the cooling liquid which absorbs the heat of the light source device 1 and is heated is smaller than the density of the cooling liquid which is cooled by the heat exchanger 43, so that the cooling liquid which absorbs the heat of the light source device 1 and is heated floats on the level of the cooling liquid which is cooled by the heat exchanger 43, and the cooling liquid which is cooled by the heat exchanger 43 is lifted to the cooling liquid which absorbs the heat of the light source device 1 and is heated, so that the cooling liquid which absorbs the heat of the light source device 1 and is heated is gradually far away from the liquid outlet 412 and flows toward the heat exchanger 43.

Fig. 9 is a connection diagram of the heat conductive layer 44 of the light management projector 100 of the present invention.

As shown in fig. 9, a heat conducting layer 44 is further provided between the liquid cooling head 41 and the light source device 1, and the heat conducting layer 44 has a heat conductivity larger than that of the outside air. One end of the heat conduction layer 44 is connected with the liquid cooling head 41, and the other end is connected with the light source device 1, so that the heat conduction layer 44 is connected with the liquid cooling head 41 and the light source device 1. The heat conduction layer 44 realizes heat conduction between the liquid cooling head 41 and the light source device 1, and improves the efficiency of heat conduction. Specifically, the heat conductive layer 44 may be pearl wool, but is not limited thereto.

Fig. 10 is an internal configuration diagram of the liquid cooling head 41 of the optical processing projector 100 of the present invention. Fig. 11 is a front view of the liquid cooling head 41 of the light processing projector 100 of the present invention. Fig. 12 is a front view of the second fin 4133 of the light processing projector 100 of the present invention.

Referring to fig. 10 to 12, the liquid cooling head 41 is hollow, an inner cavity is provided in the liquid cooling head 41, a vapor tube 413 is provided in the inner cavity, the vapor tube 413 is composed of two copper plates 4131 and a plurality of copper tubes 4132 distributed between the two copper plates 4131, and both ends of each copper tube 4132 are respectively communicated with the two copper plates 4131 and are parallel to each other.

Optionally, copper powder is filled in the inner wall of the vapor tube 413, a capillary structure layer is formed on the inner wall of the vapor tube 413 after the copper powder is subjected to a sintering process, the capillary structure layer has a plurality of pores, and the heat dissipation area of the inner wall of the vapor tube 413 is increased through the capillary structure layer, so that the heat dissipation efficiency of the vapor tube 413 is increased, and the heat conduction efficiency of the liquid cooling head 41 is further increased.

The two copper plates 4131 are a first copper plate 4131a and a second copper plate 4131b, respectively, and the first copper plate 4131a is a hot end of the vapor tube 413, connected to the heat conductive layer 44, and exchanges heat with the heat conductive layer 44. The second copper plate 4131b is the cold end of the vapor tube 413, is located on the side of the first copper plate 4131a facing away from the light source device 1, and is cooled mainly by air cooling.

Specifically, distilled water is provided in the steam pipe 413, and vacuum treatment and sealing treatment are performed. The inside of the sealed steam pipe 413 is in a negative pressure state, so that the boiling point of the distilled water is reduced, local high pressure is generated in the process that the distilled water is in a liquid-gas two-phase change state by the steam pipe 413, the steam pipe drives the water working fluid in the gas phase to flow from the hot end to the cold end, and the flowing efficiency of the water in the gas phase is improved. Since the distilled water realizes two phase changes of liquid and gas in the vapor tube 413, the vapor tube 413 realizes heat conduction between the two copper plates 4131 through the capillary structure layer, so that the vapor tube 413 has the characteristics of rapid heat conduction and small heat resistance.

The copper tube 4132 communicates the two copper plates 4131, the copper tube 4132 is provided with a plurality of second fins 4133, and each of the second fins 4133 penetrates and is attached to the plurality of copper tubes 4132 to increase the heat radiation area of the copper tubes 4132.

The second fins 4133 are provided at intervals along the longitudinal direction of the copper tube 4132. A flow passage through which the cooling liquid flows is formed between two adjacent second fins 4133, thereby increasing the heat exchange efficiency between the second fins 4133 and the cooling liquid. Optionally, the second fins 4133 are formed by butt-welding two heat dissipation fins 4133a, and a plurality of through holes 4133b through which the copper tubes 4132 penetrate are formed in the opposite end portions of the two heat dissipation fins 4133 a. Specifically, the second fins 4133 are made of copper.

Further, the plurality of second fins 4133 are parallel to each other and parallel to a plane formed by connecting the axis of the liquid inlet 411 of the liquid cooling head 41 and the axis of the liquid outlet 412 of the liquid cooling head 41, so that the resistance of the cooling liquid during flowing is effectively reduced, and the cooling liquid can conveniently flow between the liquid inlet 411 and the liquid outlet 412 along the plurality of second fins 4133.

When the light source device 1 is in an operating state, the light source device 1 generates a large amount of heat, the heat is transferred to the vapor tube 413 of the liquid-cooling head 41 through the heat conduction layer 44, so that the distilled water at the hot end of the vapor tube 413 is heated and vaporized, and the heat is transferred to the plurality of second fins 4133 and the cold end of the vapor tube 413, and in addition, the second fins 4133 are in contact with the cooling liquid, the heat is transferred to the cooling liquid, the temperature of the cooling liquid rises after the cooling liquid absorbs heat, the density of the cooling liquid decreases, and the heated cooling liquid floats upwards.

Fig. 6 is a block diagram of the cooling unit 4 of the light processing projector 100 of the present invention. Fig. 13 is a front view of the heat exchanger 43 of the light processing projector 100 of the present invention.

Referring to fig. 6 and 13, the cooling liquid heated by absorbing the heat of the light source device 1 exchanges heat with the outside air in the heat exchanger 43 to transfer the heat to the air, wherein the heat exchanger 43 includes a liquid cooling row 431 and a first fan 432 opposite to the liquid cooling row 431, and the first fan 432 drives the outside air to flow through the liquid cooling row 431, so that the outside air is forced to flow in the liquid cooling row 431 under the action of the first fan 432, and the efficiency of convection between the outside air and the liquid cooling row 431 is improved, thereby cooling the cooling liquid in the liquid cooling row 431.

The position of the center line of the heat exchanger 43 is higher than that of the center line of the liquid cooling head 41, so that the potential energy of the cooling liquid at the heat exchanger 43 is larger than that of the cooling liquid at the liquid cooling head 41. The coolant that has absorbed the heat of the light source device 1 and has been warmed up flows into the heat exchanger 43 along the coolant circulation passage, the heat exchanger 43 discharges the coolant that has been cooled down by the heat exchanger 43 along the coolant circulation passage, and the coolant that has been cooled down by the heat exchanger 43 flows into the liquid cooling head 41 from the heat exchanger 43 under the action of gravity.

Here, the heat exchanger 43 cools the coolant that has been heated by absorbing the heat of the light source device 1, and the coolant cooled by the heat exchanger 43 flows from the heat exchanger 43 to the liquid cooling head 41 by gravity. According to the principle of conservation of energy, the difference between the potential energy of the coolant cooled by the heat exchanger 43 at the heat exchanger 43 with respect to the potential energy of the coolant cooled by the heat exchanger 43 at the liquid cooling head 41 is converted into the kinetic energy of the coolant cooled by the heat exchanger 43, and becomes one of the powers of self-circulation of the coolant in the coolant circulation passage.

The power supply of the cooling liquid circulation is realized through the potential energy conversion and the density difference of the cooling liquid, so that the self-circulation of the cooling liquid is realized under the condition that a pump is not required to be installed on the cooling assembly 4, further, redundant electronic devices are not required to be added, the noise of the cooling assembly 4 is reduced, and the reliability of the cooling assembly 4 is improved.

Fig. 14 is a plan view of the heat exchanger 43 of the light processing projector 100 of the present invention. Fig. 15 is a perspective view of the heat exchanger 43 of the light processing projector 100 of the present invention.

Referring to fig. 14 and 15, the position of the center line of the liquid cooling bar 431 is higher than the position of the center line of the liquid cooling head 41, and the height difference between the center line of the liquid cooling bar 431 and the center line of the liquid cooling head 41 is greater than or equal to 500 mm. The liquid cooling bank 431 includes an inlet pipe 4311, an outlet pipe 4312, a plurality of heat exchange pipes (not shown) connected in sequence, and having one end connected to the inlet pipe 4311 and the other end connected to the outlet pipe 4312, and a plurality of first fins 4313 for conducting the inlet pipe 4311 and the outlet pipe 4312 through the plurality of heat exchange pipes. The first fins 4313 achieve heat exchange of the cooling liquid with the outside air in the liquid-cooled bank 431 and transfer heat to the air.

The inlet pipe 4311 is mainly used for receiving the cooling liquid heated by absorbing the heat of the light source device 1, and the outlet pipe 4312 is mainly used for discharging the cooling liquid cooled by the liquid cooling outlet 431. Further, the inlet pipe 4311 is a telescopic pipe, and the position of the inlet pipe 4311 is adjusted to adjust the position of the center line of the liquid cooling bar 431, and further, to adjust the height difference between the position of the center line of the liquid cooling bar 431 and the position of the center line of the liquid cooling head 41. Specifically, the inlet pipe 4311 may be a telescopic water pipe, a PEP pipe with a folding structure, a telescopic sleeve, and the like, which is not limited herein.

The outlet pipe 4312 is provided on the lower side of the inlet pipe 4311, and the coolant, which has been warmed up by absorbing the heat of the light source device 1, flows in a direction in which the inlet pipe 4311 flows toward the outlet pipe 4312, and passes through the plurality of heat exchange pipes and the plurality of first fins 4313.

The plurality of heat exchanging pipes are connected in sequence and conduct the inlet pipe 4311 and the outlet pipe 4312 to realize the flow of the cooling liquid warmed up by absorbing the heat of the light source device 1. The adjacent heat exchange tubes are connected in an arc shape and arranged at intervals in the width direction, so that a flow path of the coolant heated by absorbing the heat of the light source device 1 is extended, and a contact area between the coolant heated by absorbing the heat of the light source device 1 and the first fin 4313 is increased.

The plurality of first fins 4313 are provided at intervals in the width direction and are parallel to each other. The first fin 4313 has a heat transfer function, and is mainly used to contact with the plurality of heat exchange tubes to exchange heat with the coolant that has been warmed by absorbing heat of the light source device 1, and to exchange heat with outside air. The first fin 4313 is sheet-shaped and has a through hole (not shown), and the plurality of heat exchange tubes are sequentially inserted into the through hole and contact with the first fin 4313. The heat conduction between the first fin 4313 and the heat exchange tube is realized by the contact between the first fin 4313 and the heat exchange tube, and the coolant heated by absorbing the heat of the light source device 1 flows through the heat exchange tube and exchanges heat with the heat exchange tube, so that the first fin 4313 exchanges heat with the coolant heated by absorbing the heat of the light source device 1, and discharges the heat of the coolant heated by the heat of the light source device 1 to the outside air.

The first fans 432 are provided in plurality, and the first fans 432 are provided side by side with respect to the liquid-cooling bank 431. The first fan 432 can realize forced convection of the external air and the liquid cooling bar 431 through air suction or air exhaust of the liquid cooling bar 431, improve the heat dissipation efficiency of the liquid cooling bar 431, and improve the cooling efficiency of the cooling liquid which absorbs the heat of the light source device 1 and is heated. Further, a semiconductor refrigerator is additionally arranged at the liquid cooling bar 431, the cold end of the semiconductor refrigerator is in contact with the liquid cooling bar 431, forced convection of external air and the liquid cooling bar 431 is realized under the action of the first fan 432, and secondary cooling of the liquid cooling bar 431 is realized. Further, the temperature of the coolant in the liquid-cooled bank 431 can be adjusted by adjusting the rotation speed of the first fan 432.

Further, the cooling assembly 4 further comprises an exhaust valve 45, and the exhaust valve 45 mainly realizes the exhaust of the gas through opening and closing. A small amount of vapor is generated due to the temperature rise of the cooling liquid, and the vapor flows along the flow of the cooling liquid in the closed cooling liquid circulation channel, and the heat generated by the light source device 1 in the cooling liquid circulation channel is absorbed by the cooling liquid at any moment, so that a large amount of vapor exists in the cooling liquid circulation channel and cannot be discharged, wherein the vapor has a density lower than that of the cooling liquid and is mainly concentrated at the high position of the liquid cooling row 431 of the cooling liquid circulation channel. The exhaust valve 45 is mainly used for exhausting gas, is arranged at the highest point of the liquid cooling bar 431, and exhausts steam accumulated at the high position of the liquid cooling bar 431 through the exhaust valve 45, so that the efficiency of a cooling liquid circulation channel is improved, and the resistance of the steam to the cooling liquid in the cooling liquid circulation channel is reduced.

Fig. 16 is a block diagram of the duct 42 in another embodiment of the light processing projector 100 of the present invention.

Referring to fig. 16, the pipe 42 includes a liquid outlet pipe 421 and a return pipe 422, the total length of the liquid outlet pipe 421 is greater than the total length of the return pipe 422, wherein the pipe 42 is provided with a plurality of arc chamfers to reduce the internal resistance of the pipe 42, and in addition, the pipe 42 is a smooth pipe, and the inner wall of the pipe 42 is coated with a smooth waterproof coating, so as to further reduce the internal resistance of the pipe 42.

The liquid outlet pipe 421 connects the liquid outlet of the liquid cooling head 41 and the liquid inlet of the heat exchanger 43, and the reflux pipe 422 connects the liquid inlet 411 of the liquid cooling head 41 and the liquid outlet of the heat exchanger 43. The liquid cooling head 41 and the heat exchanger 43 are communicated through the liquid outlet pipe 421 and the return pipe 422, so that the liquid outlet pipe 421, the return pipe 422, the heat exchanger 43 and the liquid cooling head 41 together form a cooling liquid circulation channel of the cooling assembly 4. The cooling liquid passes through the liquid outlet pipe 421, the heat exchanger 43, the return pipe 422 and the liquid cooling head 41 in sequence from the liquid cooling head 41, and self-circulation flow is realized in the cooling liquid circulation channel. Specifically, the liquid outlet pipe 421 connects the liquid cooling head 41 and the heat exchanger 43, and extends from the liquid cooling head 41 to the heat exchanger 43.

The liquid outlet pipe 421 connects the liquid outlet 412 of the liquid cooling head 41 and the liquid inlet of the heat exchanger 43, so that the cooling liquid in the liquid outlet pipe 421 is heated mainly to absorb the heat of the light source device 1. Based on the heat exchanger 43 being higher than the liquid cooling head 41, the liquid outlet pipe 421 has a first vertical section 4211 extending vertically and a first inclined section 4212 connecting the first vertical section 4211 and the heat exchanger 43, wherein a connection point of the first inclined section 4212 and the first vertical section 4211 is a highest point of the liquid outlet pipe 421. Optionally, the outer layer of the outlet pipe 421 may be wrapped with a thermal insulation material to reduce the heat energy loss of the cooling fluid in the outlet pipe 421.

Fig. 17 is a flow chart of the wind direction in the ventilation channel 423 of the light processing projector 100 of the present invention. Fig. 18 is a wind direction view of the cooling unit 4 of another embodiment of the light processing projector 100 of the present invention.

With reference to fig. 17 and 18, further, a first fan 432 is disposed at the optical-mechanical device 2 of the optical processing projector 100, and the first fan 432 can realize forced convection between the external air and the optical-mechanical device 2 by air suction or air exhaust of the optical-mechanical device 2, and conduct heat generated by the optical-mechanical device 2 to the liquid outlet pipe 421, so as to increase the temperature of the cooling liquid in the liquid outlet pipe 421 and increase the temperature difference.

Optionally, the light processing projector 100 further includes a ventilation channel 423, and the ventilation channel 423 is surrounded by a plurality of enclosing plates 4231. The ventilation channel 423 extends from the bare engine 2 to the liquid outlet pipe 421, so that the bare engine 2 and the liquid outlet pipe 421 are in the same ventilation channel 423. The ventilation channel 423 is provided with a second fan 4232, the second fan 4232 realizes forced convection of the external air and the optical mechanical device 2 by induced draft or induced draft of the optical mechanical device 2, and the heat generated by the optical mechanical device 2 flows to the liquid outlet pipe 421 along the ventilation channel 423, so that the heat generated by the optical mechanical device 2 is better utilized by the liquid outlet pipe 421, the waste heat of the optical mechanical device 2 is fully utilized, and the temperature of the cooling liquid in the liquid outlet pipe 421 is increased and the temperature difference is increased. In particular, the shroud 4231 may be made of plastic, and the shroud 4231 is capable of withstanding heat generated by the opto-mechanical device 2.

Optionally, the ventilation channel 423 may also accommodate the board card 8 of the light processing projector 100, and the board card 8 supplies heat to the ventilation channel 423, so that the ventilation channel 423 better utilizes heat generated by an electrical appliance in the light processing projector 100 to the liquid outlet pipe 421, in another embodiment, the board card 8 of the light processing projector 100 may not be accommodated in the ventilation channel 423, and a second fan 4232 is additionally arranged at the board card 8 of the light processing projector 100, so that the heat of the board card 8 of the light processing projector 100 flows to the liquid outlet pipe 421 under the drainage effect of the second fan 4232.

Optionally, a semiconductor refrigerator is additionally arranged on the liquid outlet pipe 421, the semiconductor refrigerator is arranged on the periphery of the liquid outlet pipe 421, and the hot end of the semiconductor refrigerator is in contact with the liquid cooling head 41 or the liquid outlet pipe 421 to heat the cooling liquid in the liquid cooling head 41 or the liquid outlet pipe 421, so that the temperature of the cooling liquid is further increased before the cooling liquid enters the liquid cooling bar 431, and the temperature difference between the cooling liquid in the liquid outlet pipe 421 and the cooling liquid in the return pipe 422 is increased. Wherein, the semiconductor refrigerator can be a heating device 46 of the liquid outlet pipe 421.

The lower end of the first vertical section 4211 is connected with the liquid outlet 412 of the liquid cooling head 41, and the upper end of the first vertical section 4211 extends upwards beyond the heat exchanger 43. Wherein the coolant, which has absorbed the heat of the light source device 1 and has been heated up, flows toward the heat exchanger 43 along the first vertical section 4211 by the lifting force of the coolant, which has been cooled down by the heat exchanger 43. The first vertical section 4211 facilitates the upward flow of the coolant warmed up by absorbing the heat of the light source device 1, thereby reducing the flow resistance of the liquid outlet pipe 421 to the coolant warmed up by absorbing the heat of the light source device 1.

The upper end of the first inclined section 4212 is connected with the liquid outlet of the first vertical section 4211, the lower end of the first inclined section 4212 is connected with the heat exchanger 43, and the first inclined section 4212 is connected with the heat exchanger 43 obliquely downwards from the upper end of the first vertical section 4211. The coolant heated by absorbing the heat of the light source device 1 flows to the heat exchanger 43 along the first inclined section 4212 by gravity, and the gravity is used to drive the flow of the coolant heated by absorbing the heat of the light source device 1, so that the coolant heated by absorbing the heat of the light source device 1 flows more smoothly. Specifically, the slope of the first inclined section 4212 with respect to the horizontal plane is 1 ° to 10 °, which is not limited herein.

The return pipe 422 connects the liquid inlet 411 of the liquid cooling head 41 and the liquid outlet of the heat exchanger 43, so that the cooling liquid cooled by the heat exchanger 43 is mainly located in the return pipe 422. Based on the heat exchanger 43 being higher than the liquid cooling head 41, the return conduit 422 has a second vertical section 4221 extending vertically and a second inclined section 4222 connecting the second vertical section 4221 with the liquid cooling head 41, wherein the connection point of the second inclined section 4222 and the second vertical section 4221 is the lowest point of the return conduit 422. Specifically, the return conduit 422 communicates between the heat exchanger 43 and the liquid cooling head 41 and extends from the heat exchanger 43 to the liquid cooling head 41.

Further, a heat exchanger is disposed between the return pipe 422 and the liquid cooling drain 431, and the heat exchanger is disposed on the peripheral side of the return pipe 422. The heat exchanger is internally provided with cold water or ice blocks and the like, and performs heat exchange with the return pipeline 422, so that secondary cooling is realized on the cooling liquid in the return pipeline 422, and the temperature difference between the cooling liquid in the return pipeline 422 and the cooling liquid in the liquid outlet pipeline 421 is increased. Wherein the heat exchanger may be the cooling device 47 of the return conduit 422.

The lower end of the second vertical section 4221 is the lowest point of the return pipe 422, and the upper end of the second vertical section 4221 is upwardly connected with the liquid inlet 411 of the liquid cooling head 41. Wherein, the cooling liquid cooled by the heat exchanger 43 flows to the liquid cooling head 41 along the second vertical section 4221 in the process of potential energy conversion. The upward flow of the coolant cooled by the heat exchanger 43 is facilitated by the second vertical section 4221, thereby reducing the flow resistance of the return conduit 422 to the coolant cooled by the heat exchanger 43

The upper end of the second inclined section 4222 is connected with the liquid outlet of the heat exchanger 43, the lower end of the second inclined section 4222 is connected with the lower end of the second vertical section 4221, and the second inclined section 4222 is connected with the lower end of the second vertical section 4221 from the upper end of the second inclined section 4222. The cooling liquid cooled by the heat exchanger 43 flows to the liquid cooling head 41 along the second inclined section 4222 under the action of gravity, and the gravity is fully utilized to drive the flow of the cooling liquid cooled by the heat exchanger 43, so that the cooling liquid cooled by the heat exchanger 43 flows more smoothly. Specifically, the slope of the second inclined section 4222 with respect to the horizontal plane is 1 ° to 10 °, which is not limited herein.

Fig. 19 is a structural diagram of the expansion module 424 of the optical processing projector 100 of the present invention. Fig. 20 is a partial structural view of the expansion module 424 of the optical processing projector 100 of the present invention.

Referring to fig. 19 and 20, further, a first telescopic pipe 4211a is arranged in the first vertical section 4211, a second telescopic pipe 4221a is arranged in the second vertical section 4221, a telescopic module 424 is arranged between the first vertical section 4211 and the second vertical section 4221, a connecting end of the telescopic module 424 is connected with one end of the first telescopic pipe 4211a and one end of the second telescopic pipe 4221a, the telescopic module 424 is used for driving the first telescopic pipe 4211a and the second telescopic pipe 4221a to be telescopic, so that the pipe lengths of the liquid outlet pipe 421 and the return pipe 422 are adjusted, and the cooling assembly 4 is adapted to an actual use environment. Optionally, one end of the first telescopic tube 4211a is at the same height as one end of the second telescopic tube 4221 a.

The first telescopic tube 4211a is a first pipe having a plurality of sections connected in a sealing manner, a first central shaft 4211b is arranged in the middle of the first pipe, a first adjusting tube 4211c is symmetrically arranged around the first central shaft 4211b, and the first adjusting tube 4211c can be telescopic relative to the first central shaft 4211 b.

The second expansion pipe 4221a is a second pipe having a plurality of sections connected in a sealing manner, a second central shaft 4221b is provided in the middle of the second pipe, a second adjusting pipe 4221c is symmetrically provided around the second central shaft 4221b, and the second adjusting pipe 4221c can expand and contract relative to the second central shaft 4221 b.

The telescoping module 424 includes a bracket 4241, a track 4242, a slider 4243 and a drive member (not shown). The support 4241 is in a vertical state and is fixedly arranged on the ground or a wall. A support 4241 is optionally located between the outlet line 421 and the return line 422.

The rail 4242 is mounted on a bracket 4241. The driver drives the slider 4243 to rotate, and the slider 4243 is slidably connected to the track 4242, so that the slider 4243 can move along the track 4242 under the driving of the driver.

Two sides of the sliding block 4243 are provided with a connecting shaft 4243a, and the connecting shaft 4243a is connected with the first adjusting tube 4211c and the second adjusting tube 4221c and drives the first adjusting tube 4211c and the second adjusting tube 4221c to extend and retract along the track 4242.

When the thermal power of the light source device 1 is high, the light source device 1 and the liquid cooling head 41 perform heat exchange, so that the cooling liquid located in the liquid cooling head 41 absorbs more heat, and the temperature difference of the cooling liquid located in the liquid cooling head 41 is large. When the thermal power of the light source device 1 is low, the light source device 1 and the liquid cooling head 41 perform heat exchange, so that the cooling liquid located in the liquid cooling head 41 absorbs less heat, and the temperature difference of the cooling liquid located in the liquid cooling head 41 is small. Therefore, in order to reduce the on-way resistance of the cooling assembly 4, the cooling assembly 4 adjusts the pipe lengths of the first telescopic pipe 4211a and the second telescopic pipe 4221a through the telescopic module 424, so that the height from the center of the liquid cooling head to the center of the liquid cooling row is appropriately lowered or raised.

Fig. 21 is a perspective view of the fluid infusion device 48 of the optical processing projector 100 according to the present invention.

As shown in fig. 21, the cooling module 4 further includes a liquid replenishing device 48, and the liquid replenishing device 48 is mainly used for replenishing the cooling liquid evaporated due to the temperature increase of the cooling liquid so as to balance the cooling liquid in the cooling module 4. The liquid supplementing device 48 is hollow and long-strip-shaped and is communicated with the cooling liquid circulating channel, and the position of the liquid supplementing device 48 is higher than the cooling liquid circulating channel. Specifically, a liquid outlet of the liquid supplementing device 48 is communicated with the liquid outlet pipe 421, and the highest point of the liquid outlet pipe 421 is the highest point of the cooling liquid circulation passage.

A liquid storage cavity 481 is arranged in the liquid supplementing device 48 to store cooling liquid, and a liquid outlet of the liquid storage cavity 481 is communicated with the cooling liquid circulating channel to supplement the cooling liquid into the cooling assembly 4. The coolant stored in the fluid infusion device 48 is drained to the coolant circulation channel under the action of gravity to supplement the coolant.

A notch 482 is formed in the upper portion of the fluid infusion device 48, and the notch 482 is communicated with the outside and the fluid storage cavity 481, so that the fluid storage cavity 481 is communicated with the outside. The lower part of the liquid supplementing device 48 is a liquid outlet of the liquid supplementing device 48 and is communicated with a cooling liquid circulating channel. The notch 482 enables the cooling liquid circulation channel to be communicated with the outside through the liquid supplementing device 48, wherein a small amount of steam generated due to the temperature rise of the cooling liquid flows along the flowing of the cooling liquid in the closed cooling liquid circulation channel, and the steam is discharged to the outside at the position of the cooling liquid circulation channel relative to the liquid supplementing device 48 along the direction of the liquid supplementing device 48, so that the steam is discharged along the liquid supplementing device 48, the efficiency of the cooling liquid circulation channel is improved, and the resistance of the steam to the cooling liquid in the cooling liquid circulation channel is reduced. Optionally, the liquid outlet of the liquid replenisher 48 is communicated with the highest point of the cooling liquid circulation channel, so as to discharge a large amount of vapor.

Fig. 22 is a block diagram of the fluid infusion device 48 in accordance with another embodiment of the optical processing projector 100 of the present invention.

As shown in fig. 22, a cover plate 483 for covering the notch 482 is disposed on the upper portion of the liquid infusion device 48, the cover plate 483 is provided with a plurality of air holes 4831 communicating with the notch 482, the communication between the outside and the liquid storage chamber 481 can be achieved through the plurality of air holes 4831, and the cover plate 483 can prevent other impurities from entering the liquid storage chamber 481.

Fig. 23 is a connection diagram of the temperature detection unit 49 of the light processing projector 100 of the present invention.

As shown in fig. 23, the cooling assembly 4 further includes a temperature detecting unit 49, the temperature detecting unit 49 is mainly a contact type detecting temperature display instrument, and the temperature detecting unit 49 is in contact with a heating point of an object to be detected, so as to display the temperature corresponding to the heating point in real time, and the temperature detecting unit 49 is mainly used for detecting the temperature and visually displaying the temperature corresponding to the heating point.

In the cooling module 4, the temperature detecting unit 49 is mainly disposed at the liquid inlet 411 of the liquid cooling head 41, the liquid outlet 412 of the liquid cooling head 41, the liquid cooling bar 431, or the light source device 1 to detect the corresponding temperature. The temperature detecting unit 49 is used to visually display the corresponding temperatures of the cooling liquid flowing into the liquid cooling head 41 and the cooling liquid flowing out of the liquid cooling head 41 through the liquid inlet 411 of the liquid cooling head 41 and the liquid outlet 412 of the liquid cooling head 41.

The temperature detected by the temperature detection unit 49 enables a user to easily detect an abnormality of the cooling module 4, so as to balance the temperature at the liquid cooling head 41 by adjusting the liquid cooling rows 431, thereby balancing the cooling module 4. The adjustment of the liquid cooling bar 431 mainly includes adjusting the height difference between the liquid cooling bar 431 and the liquid cooling head 41 and adjusting the rotation speed of the first fan 432.

the heat exchanger 43 is connected to the liquid cooling head 41 through the pipe 42 to form a cooling liquid circulation channel together, wherein the liquid cooling head 41 absorbs heat emitted from the light source device 1 to reduce the temperature of the peripheral side of the light source device 1, thereby ensuring the normal operation of the light source device 1. The heat exchanger 43 cools the coolant that has been heated by absorbing the heat of the light source device 1. Since the density of the coolant is affected by the temperature, the density of the coolant that absorbs the heat of the light source device 1 to increase the temperature is lower than the density of the coolant that is cooled by the heat exchanger 43, and therefore the coolant that absorbs the heat of the light source device 1 to increase the temperature floats on the surface of the coolant that is cooled by the heat exchanger 43 and is lifted by the coolant that is cooled by the heat exchanger 43.

The position of the center line of the heat exchanger 43 is higher than the position of the center line of the liquid cooling head 41, so that the potential energy of the cooling liquid cooled by the heat exchanger 43 is larger than the potential energy of the cooling liquid heated by absorbing the heat of the light source device 1. The cooling liquid which absorbs the heat of the light source device 1 and is heated up flows into the liquid cooling head 41 from the heat exchanger 43 under the action of gravity, the potential energy of the cooling liquid cooled by the heat exchanger 43 is converted into kinetic energy to provide power for cooling liquid circulation, the cooling liquid which absorbs the heat of the light source device 1 and is heated up circularly flows in the cooling liquid circulation channel under the condition that the driving force is not required to be supplied by a pump, the cooling liquid in the cooling assembly 4 is enabled to self-circulate, and the heat emitted by the light source device 1 is taken away.

The cooling assembly 4 realizes the circulating flow of the cooling liquid based on the density difference and potential energy conversion of the cooling liquid, so that the cooling assembly 4 realizes the self-circulation of the cooling liquid without installing a pump, additional redundant electronic devices are not needed, the noise of the cooling assembly 4 is reduced, and the reliability of the cooling assembly 4 is improved.

In addition, the pipe 42 includes a liquid outlet pipe 421 and a return pipe 422, the liquid outlet pipe 421 has a first vertical section 4211 extending vertically, the lower end of the first vertical section 4211 is connected with the liquid outlet of the liquid cooling head 41, the upper end of the first vertical section 4211 extends upwards beyond the heat exchanger 43, the return pipe 422 is provided with a second vertical section 4221 extending vertically, the lower end of the second vertical section 4221 is the lowest point of the return pipeline 422, the upper end of the second vertical section 4221 is upwards connected with a liquid inlet of the liquid cooling head 41, the cooling liquid flows to the heat exchanger 43 along the first inclined section 4211 under the action of gravity, and makes full use of gravity to drive the flow of the cooling liquid, so that the cooling liquid heated by absorbing the heat of the light source device 1 flows more smoothly, in addition, the upward flow of the cooling liquid is facilitated by the first vertical section 4211 and the second vertical section 4221, so that the flow resistance of the liquid outlet pipe 421 to the cooling liquid is reduced.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A light processing projector, comprising:

a light source device for generating a laser light source;

the optical-mechanical device receives the laser light source and outputs an image light beam;

the lens is positioned on the transmission path of the image light beam and used for projecting the image light beam; and

a cooling assembly for cooling the light source device; the cooling component is internally provided with cooling liquid, and the cooling liquid flows in the cooling component in a self-circulation manner under the action of gravity in combination with density difference and takes away heat generated by the light source device;

the cooling assembly includes:

the liquid cooling head is used for exchanging heat with the light source device to absorb heat emitted by the light source device;

the position of the central line of the heat exchanger is higher than that of the central line of the liquid cooling head; and

a conduit communicating the liquid cooling head and the heat exchanger to collectively form a cooling liquid circulation passage; the pipe includes:

the liquid outlet pipeline is communicated with a liquid outlet of the liquid cooling head and a liquid inlet of the heat exchanger; the liquid outlet pipeline is provided with a first vertical section which extends vertically, the lower end of the first vertical section is connected with a liquid outlet of the liquid cooling head, and the upper end of the first vertical section upwards exceeds the heat exchanger; and

the return pipeline is communicated with the liquid inlet of the liquid cooling head and the liquid outlet of the heat exchanger; the backflow pipeline is provided with a second vertical section which extends vertically, the lower end of the second vertical section is the lowest point of the backflow pipeline, and the upper end of the second vertical section is upwards connected with the liquid inlet of the liquid cooling head.

2. The light processing projector as claimed in claim 1, wherein the liquid outlet duct is further provided with a first inclined section which is connected to the heat exchanger obliquely downward from an upper end of the first vertical section; the return pipe is also provided with a second inclined section which is connected with the lower end of the second vertical section from the upper end of the second inclined section downwards in an inclined mode.

3. A light handling projector as recited in claim 2, wherein the first angled section has a slope of 1 ° to 10 ° relative to horizontal; the slope of the second inclined section relative to the horizontal plane is 1-10 degrees.

4. The light processing projector of claim 2 wherein the total length of the exit conduit is greater than the total length of the return conduit.

5. The light processing projector according to claim 1, wherein the cooling unit further comprises a temperature raising device which is provided on a peripheral side of the outlet pipe and raises a temperature of the cooling liquid flowing through the outlet pipe.

6. The light processing projector of claim 1, wherein the cooling assembly further comprises a cooling device disposed around the return duct and configured to cool the cooling liquid flowing through the return duct.

7. The light processing projector of claim 1 wherein the cooling assembly further comprises:

the temperature rising device is arranged on the periphery of the liquid outlet pipeline and used for rising the temperature of the cooling liquid flowing through the liquid outlet pipeline;

and the cooling device is arranged on the peripheral side of the return pipeline and cools the cooling liquid flowing through the return pipeline.

8. The light processing projector of claim 1, further comprising a temperature detection unit disposed at the liquid inlet of the liquid cooling head, the liquid outlet of the liquid cooling head, the liquid cooling bar, or the light source device to detect a corresponding temperature.

9. A light handling projector as defined in claim 1 further comprising a heat concentrating module; the light source devices are conducted and converged on the heat concentration module, and concentrate heat on the heat concentration module.