CN220381440U

CN220381440U - Temperature control system of optical machine

Info

Publication number: CN220381440U
Application number: CN202321652064.0U
Authority: CN
Inventors: 虞涛
Original assignee: Yibin Jimi Photoelectric Co Ltd
Current assignee: Yibin Jimi Photoelectric Co Ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2024-01-23
Anticipated expiration: 2033-06-27

Abstract

The utility model relates to the technical field of heat dissipation systems, in particular to a temperature control system of an optical machine, which comprises a refrigeration module and a display module, wherein the display module is provided with a ventilating duct for heat dissipation, the refrigeration module comprises a semiconductor refrigerator and a first fan, the cold end of the semiconductor refrigerator is provided with a cold end heat exchange piece, the hot end of the semiconductor refrigerator is provided with a hot end heat exchange piece, and air flow generated by the first fan is communicated to an inlet of the ventilating duct after passing through the cold end heat exchange piece. The optical machine temperature control system can perform active cooling, has good heat dissipation effect, high efficiency and good flexible adjustment, is compact in structure and small in occupied space while improving heat dissipation efficiency, ensures the working stability of the optical machine, and is beneficial to improving the performance of a projection system.

Description

Temperature control system of optical machine

Technical Field

The utility model relates to the technical field of heat dissipation systems, in particular to a temperature control system of an optical machine.

Background

The light machine is a core part of a projection system and mainly comprises a light source, a display device and other various devices for forming a light path, the projection system mainly comprises an LCD projection system, an LCOS projection system, a DLP projection system and the like, the display device of the LCD projection system is an LCD screen, and the light source and the display device of the light machine are main heating sources when the light machine works, and a heat dissipation system is usually required to be arranged for dissipating heat of the light source and the display device so as to ensure that the light source and the display device are at proper working temperature. The existing projection system has higher and higher requirements on brightness and higher power consumption, so that the heat productivity of the light source and the display during operation is higher and higher, the existing heat dissipation system is difficult to consider heat dissipation efficiency and volume, or the heat dissipation efficiency is lower, the temperature is difficult to effectively control, or the volume is too large, the system is suitable for miniaturized development, and the performance improvement of the projection system is limited.

Disclosure of Invention

The utility model aims to solve the technical problems and the technical task of improving the prior art, provides a temperature control system of an optical machine, and solves the problems that the heat dissipation efficiency and the volume of the heat dissipation system for the optical machine are difficult to consider and the improvement of the performance of a projection system is limited in the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a ray apparatus temperature control system, includes refrigeration module and display module assembly, the display module assembly is provided with the air flue that is used for carrying out radiating to the display element wherein, refrigeration module assembly includes semiconductor refrigerator and fan one, the cold junction of semiconductor refrigerator is provided with cold junction heat exchange piece, the hot junction of semiconductor refrigerator is provided with hot junction heat exchange piece, the air current that fan one produced is led to behind cold junction heat exchange piece the entry of air flue. The utility model discloses a light machine temperature control system, which utilizes a semiconductor refrigerator to prepare cold energy to realize active cooling, the temperature of the cold end of the semiconductor refrigerator is reduced when the semiconductor refrigerator is electrified, the temperature of the hot end of the semiconductor refrigerator is increased, air flow generated by a fan I is absorbed by a cold end heat exchange piece in a heat exchange mode to be changed into cooling air flow with lower temperature, the cooling air flow passes through an air duct of a display module to effectively cool a display unit, the long-acting stable work of the display unit is ensured, the semiconductor refrigerator has the advantages of no noise, no vibration, no refrigerant, small volume and light weight, and the refrigeration can be conveniently controlled by adjusting the electrification, so that the light machine temperature control system has simple and compact structure when the active cooling is carried out, and the whole occupied space is small when the heat dissipation efficiency is improved, thereby being beneficial to improving the performance of a projection system.

Further, the cold end heat exchange piece comprises a plurality of fins which are arranged at intervals, and a refrigerating air duct used for allowing air flow generated by the fan I to pass through is formed between the fins. Simple structure, easy to implement, the heat exchange area is big to the air current is unobstructed, makes the air current that passes through from cold junction heat exchange piece can be abundant carry out the heat exchange in order to absorb the cold volume that semiconductor refrigerator prepared, improves the radiating efficiency to the display module assembly.

Further, the cold end and the cold end heat exchange piece of the semiconductor refrigerator and the hot end heat exchange piece of the semiconductor refrigerator are respectively bonded through heat conduction silver colloid. The heat exchange device has the advantages that the connection stability is guaranteed, meanwhile, the heat conduction efficiency is high, the cold produced by the semiconductor refrigerator can be sufficiently and efficiently conducted to the cold-end heat exchange piece, the cold utilization full rate is improved, and the heat dissipation efficiency of the display module is improved.

Further, the fan-type air conditioner further comprises a dustproof air duct, wherein a dustproof filter piece is arranged at the inlet of the dustproof air duct, the outlet of the dustproof air duct is connected to the inlet of the air duct, and the fan-type air conditioner and the cold end heat exchange piece are arranged in the dustproof air duct. The dustproof effect is guaranteed when ventilation and heat dissipation are carried out on the display module, the dustproof filter piece is utilized to block and isolate miscellaneous dust, the miscellaneous dust is prevented from being carried into the display module by air flow, the phenomenon that the dark spots of a projection picture appear due to the fact that the miscellaneous dust is attached to the surface of a display unit is avoided, and good projection display effect is guaranteed.

Further, the LED lamp further comprises a light source heat radiation module, the light source heat radiation module comprises a second fan and a light source heat exchange piece, the light source heat exchange piece is connected with the light source in a heat conduction mode, and air flow generated by the second fan passes through the light source heat exchange piece to radiate heat. The refrigeration module is mainly used for radiating the display module, the light source radiating module is mainly used for radiating the light source, the display module and the light source work relatively independently, the display module and the light source can work stably, and the projection display effect is guaranteed.

Further, the outlet of the ventilating duct is communicated with the light source heat exchange member, the low-temperature cooling air flow generated by the refrigerating module is communicated with the light source heat exchange member from the outlet of the ventilating duct after effectively cooling the display unit, the air quantity passing through the light source heat exchange member can be improved, that is, the convection of the light source heat exchange member is improved, the heat radiating efficiency and effect of the light source heat exchange member are improved, the residual cold quantity of the low-temperature cooling air flow generated by the refrigerating module after passing through the ventilating duct can be fully utilized, that is, the semiconductor refrigerator can be utilized for carrying out compatible cooling on the light source, the temperature of the air flow blown out from the outlet of the ventilating duct can be controlled by adjusting the temperature or power of the semiconductor refrigerator, the light source heat exchange member is effectively cooled, and the radiating effect of the light source is optimized.

Further, still include the heat dissipation air vent, the entry and the export setting of heat dissipation air vent are on the shell of ray apparatus, second fan and light source heat exchange piece set up in the heat dissipation air vent, and outside air passes through the casing from the heat dissipation air vent, and second fan makes to form the flow air current in the heat dissipation air vent in order to give off heat, and the air current gets into in the casing from the entry of heat dissipation air vent and carries out the heat exchange with the heat that the light source produced in light source heat exchange piece department, and the air current absorbs the heat and discharges from the export of heat dissipation air vent after reducing the light source temperature, ensures to last stable radiating effect.

Further, the hot end heat exchange piece is arranged in the heat dissipation air duct, the temperature of the hot end of the semiconductor refrigerator is increased when the semiconductor refrigerator works, heat on the hot end is taken away by utilizing air flow passing through the heat dissipation air duct, the hot end is ensured to be at a stable temperature, and therefore the semiconductor refrigerator is ensured to work stably and have long-acting and stable refrigeration efficiency.

Further, the inlet and the outlet of the ventilating duct are arranged on the long side of the display module, so that the ventilating duct is large in caliber, better in gas ventilation quantity, short in distance of air flow passing through the display unit, capable of guaranteeing that the temperature difference between the inlet end and the outlet end of the ventilating duct is as small as possible, and beneficial to better controlling the temperature of the display unit.

Further, in the display module assembly be provided with dustproof transparent plate respectively in the both sides surface of display element, improve dustproof effect, avoid miscellaneous dirt direct adhesion at the surface of display element, even if miscellaneous dirt adhesion also can be unable to form black spot on the projection picture owing to the defocusing at the surface of dustproof transparent plate, guarantee display picture effect.

Compared with the prior art, the utility model has the advantages that:

the optical machine temperature control system can perform active cooling, has good heat dissipation effect, high efficiency and good flexible adjustment, is compact in structure and small in occupied space while improving heat dissipation efficiency, ensures the working stability of the optical machine, and is beneficial to improving the performance of a projection system.

Drawings

FIG. 1 is a schematic diagram of an overall structure of a temperature control system of an optical engine according to the present utility model;

FIG. 2 is a schematic top view of the optical engine temperature control system showing the dustproof ventilation channel;

FIG. 3 is a schematic top view of the temperature control system of the present utility model showing a heat dissipation air duct;

FIG. 4 is a schematic diagram of the semiconductor refrigerator of the present utility model connected to a cold side heat exchange member and a hot side heat exchange member;

FIG. 5 is a view showing the overall structure of the display module;

fig. 6 is a schematic cross-sectional structure of the display module.

In the figure:

the semiconductor refrigerator 11, the first fan 12, the cold end heat exchange piece 13, the refrigerating air duct 131, the hot end heat exchange piece 14, the display module 2, the display unit 21, the air duct 22, the dustproof transparent plate 23, the dustproof air duct 3, the dustproof filter piece 31, the light source 4, the light source heat dissipation module 5, the second fan 51, the light source heat exchange piece 52, the heat dissipation air duct 6 and the shell 10.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The temperature control system of the optical machine disclosed by the embodiment of the utility model has the advantages of compact structure, small occupied volume and high heat dissipation efficiency, and can ensure that the optical machine is at a proper working temperature and improve the working stability of the optical machine.

As shown in fig. 1 to 3, a temperature control system of an optical engine mainly includes a refrigeration module 1 and a display module 2, where the refrigeration module 1 and the display module 2 are installed in a housing 10 of the optical engine, the display module 2 mainly includes a display unit 21 and an optical element, the optical element may mainly include a fresnel lens, and the display unit 21 and the optical element are arranged at intervals to form an air duct 22 between them for dissipating heat of the display unit 21, in this embodiment, the optical engine adopts an LCD projection system, so that the display unit 21 is specifically an LCD screen, the air duct 22 may be specifically disposed on an light outgoing side and/or an light incoming side of the display unit 21, further, the refrigeration module 1 includes a semiconductor refrigerator 11 and a fan one 12, a cold end of the semiconductor refrigerator 11 is provided with a cold end heat exchange element 13, a hot end of the semiconductor refrigerator 11 is provided with a hot end heat exchange element 14, and an air flow generated by the fan one 12 passes through the cold end heat exchange element 13 and then enters an inlet of the air duct 22. The temperature control system of the optical machine in this embodiment utilizes the semiconductor refrigerator to prepare cold energy to actively cool the display unit 21 of the display module 2, the cold end temperature of the semiconductor refrigerator 11 is reduced when the semiconductor refrigerator is electrified, and the hot end temperature is increased, when the air flow generated by the fan I12 passes through the cold end heat exchange piece 13, the air flow absorbs the cold energy generated by the cold end of the semiconductor refrigerator in a heat exchange manner, and becomes the cooling air flow with the temperature lower than the ambient temperature, then the cooling air flow passes through the ventilation channel 22 of the display module 2 to effectively cool the display unit 21, the long-term stable operation of the display unit is ensured at a proper temperature, the service life and the display effect of the display unit are ensured, the heat generated by the hot end of the semiconductor refrigerator 11 is outwards emitted to ensure the stable operation of the semiconductor refrigerator itself, so as to ensure the long-term stable refrigeration efficiency, the cooling rate can be accurately and conveniently controlled by adjusting the electrification of the semiconductor refrigerator 11, the heat dissipation efficiency is flexibly adjusted in a mode, the requirements of various application scenes are met, the semiconductor refrigerator 11 is small in volume, the response speed is fast, and the control is convenient, and the requirement of miniaturized development is met.

In this embodiment, the cold end of the semiconductor refrigerator 11 is bonded to the cold end heat exchange member 13 and the hot end of the semiconductor refrigerator 11 is bonded to the hot end heat exchange member 14 through heat conductive silver paste, the semiconductor refrigerator 11 is stably connected to the cold end heat exchange member 13 and the hot end heat exchange member 14 in a bonding manner, and the heat conductive silver paste is used to ensure efficient heat conduction efficiency, so that cold energy produced by the semiconductor refrigerator 11 can be sufficiently and efficiently conducted to the cold end heat exchange member 13, and further air flow passing through the cold end heat exchange member 13 can effectively absorb the cold energy to effectively cool the display unit 21. Specifically, the cold end heat exchange element 13 and the hot end heat exchange element 14 both adopt fin structures, so that the heat exchange area is effectively increased, and the heat exchange efficiency with air is improved. Further, the cold-end heat exchange member 13 includes a plurality of fins arranged at intervals, a cooling air duct 131 for the air flow generated by the fan one 12 to pass through is formed between adjacent fins, the air flow passes through the cooling air duct 131 to exchange heat with the fins, the air flow absorbs the cold energy on the cold-end heat exchange member 13 and becomes cooling air flow with the temperature lower than the ambient temperature, the display unit 21 is effectively cooled, the cooling rate of the semiconductor refrigerator 11 is controlled by adjusting the power on of the semiconductor refrigerator 11, so that the temperature of the air flow passing through the cold-end heat exchange member 13 is controlled, the cooling efficiency of the display unit 21 is actively controlled, the display unit 21 can work within a set temperature range, and the working stability and the service life of the display unit 21 are ensured. In this embodiment, the fins of the cold-end heat exchange member 13 are arranged at intervals in parallel, so that the cooling air duct 131 includes a plurality of parallel channels, a larger ventilation amount is ensured while the efficient heat exchange efficiency is ensured, further, in order to improve the compactness and facilitate the layout in the optical machine, as shown in fig. 4, the path of the cooling air duct 131 is L-shaped, so that the fins of the cold-end heat exchange member 13 are L-shaped, the cold-end heat exchange member 13 further includes an L-shaped substrate, and the parallel fins arranged at intervals are connected on the substrate to form the cooling air duct 131 with an L-shaped path.

In this embodiment, the semiconductor refrigerator 11 is utilized to actively prepare cooling capacity to dissipate heat of the display module 2, and meanwhile, an air cooling heat dissipation structure is still adopted, that is, the cooling capacity prepared by the semiconductor refrigerator 11 is conveyed to the display module 2 by air flow to dissipate heat, and it is difficult to avoid that dust can be brought into the display module 2 under the action of the air flow, so that the display effect is affected. Specifically, the temperature control system of the optical machine is provided with a dustproof air duct 3 in the housing 10 of the optical machine, the inlet of the dustproof air duct 3 is provided with a dustproof filter 31, the outlet of the dustproof air duct is communicated with the inlet of the air duct 22, and the fan I12 and the cold end heat exchange piece 13 are arranged in the dustproof air duct 3. The dustproof ventilation channel 3 is a relatively closed channel, preferably, only the inlet and the outlet of the dustproof ventilation channel 3 are in a conducting state, and the dustproof filtering piece 31 is utilized to filter and intercept miscellaneous dust, so that the miscellaneous dust is prevented from entering the display module 2 along the dustproof ventilation channel 3, when the fan I12 works, stable air flow flowing from the inlet of the dustproof ventilation channel 3 to the outlet of the dustproof ventilation channel 3 is generated in the dustproof ventilation channel 3, the air entering from the inlet of the dustproof ventilation channel 3 is filtered and intercepted by the dustproof filtering piece 31, the miscellaneous dust in the air is removed, the air flow flowing along the dustproof ventilation channel 3 is clean air, the air flow absorbs cold energy to become cooling air flow when passing through the cold end heat exchanging piece 13, then the cooling air flow enters the ventilation channel 22 of the display module 2 from the outlet of the dustproof ventilation channel 3 to radiate heat of the display unit 21, the cooling efficiency of the display unit 21 is ensured, the miscellaneous dust is prevented from entering the display unit 21, and good display effect is ensured. As shown in fig. 2, the dust-proof air duct 3 is a passage marked by a thick line in the drawing, the inlet of the dust-proof air duct 3 is a through opening formed on the wall surface of the housing 10, and a dust-proof filter 31 is disposed on the through opening to filter dust, and the dust-proof filter 31 may be specifically a dust-proof net, a sealing foam, or the like. The dustproof air duct 3 may be an air duct shell member disposed inside the housing 10 and sealed by foam to form a relatively closed channel, and of course, the dustproof air duct 3 may not be an additional channel, for example, the cold end heat exchange member 13 itself encloses to form a relatively closed refrigerating air duct 131 having an inlet and an outlet, and the fan 12 is in sealing connection with the refrigerating air duct 131, so that the fan 12 and the refrigerating air duct 131 can be combined to form a part of the dustproof air duct 3, and the dustproof air duct 3 can ensure a good dustproof effect while improving a heat dissipation effect and ensuring display picture quality.

Further, as shown in fig. 6, in order to better prevent dust and guarantee the projection screen effect, the dustproof transparent plates 23 are respectively disposed on two side surfaces of the display unit 21, the dustproof transparent plates 23 cover the surface of the display unit 21, even if a small amount of impurity dust enters the display module 2, the impurity dust can only adhere to the outer surface of the dustproof transparent plates 23, the impurity dust can be effectively prevented from directly adhering to the surface of the display unit 21, and the impurity dust can not be focused on the projection screen due to defocusing when adhering to the outer surface of the dustproof transparent plates 23, so that the problem that the impurity dust causes black spots of the projection screen is solved, and the display screen effect is guaranteed.

In this embodiment, as shown in fig. 5, the inlet and the outlet of the air duct 22 are disposed on the long sides of the display module 2, the display module 2 is specifically an LCD display module, the display unit 21 is specifically an LCD screen, the LCD screen is generally rectangular, and has long sides and short sides, when the inlet and the outlet of the air duct 22 are disposed on the long sides of the display module 2, the air duct 22 can be ensured to have the largest cross-section caliber, and a larger gas throughput can be ensured, so as to ensure the heat dissipation efficiency, and the direction of the air flow passes through the display module 2 along the direction of the short sides of the display module 2, so that the distance of the air flow passing through the display unit 21 is short, and the temperature difference between the inlet end and the outlet end of the air duct 22 of the display unit 21 can be ensured to be as small as possible, thereby being beneficial to better controlling the temperature of the display unit 21.

As shown in fig. 1 to 3, the temperature control system of the optical engine further includes a light source 4 disposed in a housing 10 of the optical engine, the illumination light emitted by the light source 4 is directed to the display module 2, the image light is modulated into image light by the display unit 21, the image light is further directed to the lens to exit, a light source heat dissipation module 5 for cooling and dissipating the heat of the light source 4 is disposed in the housing 10 of the optical engine, the light source heat dissipation module 5 includes a second fan 51 and a light source heat exchange member 52, the light source heat exchange member 52 is in heat conduction connection with the light source 4, the light source heat exchange member 52 mainly includes a heat pipe and a fin structure, the fin structure has a larger heat exchange area, the heat pipe is in contact connection with the light source 4, the heat of the light source 4 is conducted to the fin structure through the heat pipe to dissipate the heat during operation, and the air flow generated by the second fan 51 is passed through the fin structure of the light source heat exchange member 52 to dissipate the heat efficiently.

In this embodiment, the outlet of the air duct 22 is led to the fin structure of the light source heat exchange member 52, the cooling capacity produced by the refrigeration module 1 is used for effectively cooling the display unit 21, and a specific air cooling mode is adopted, when the air flow passes through the cold end heat exchange member 13, the cooling capacity is absorbed and becomes cooling air flow, the cooling air flow passes through the air duct 22 of the display module 2 to cool the display unit 21, the cooling capacity is not fully acted on the display unit 21, the air flow flowing out from the outlet of the air duct 22 is relatively low, and the air flow flowing out from the outlet of the air duct 22 is led to the light source heat exchange member 52, so that the light source heat exchange member 52 can be cooled, that is, the cooling capacity not absorbed by the display unit 21 can be utilized to cool the light source 4, and the heat dissipation effect of the light source is optimized. And when the outlet of the air duct 22 is directed to the light source heat exchange member 52, the air quantity passing through the light source heat exchange member can be increased, that is, the convection at the light source heat exchange member is increased, and the efficiency and effect of the light source heat exchange member for radiating heat outwards are further improved.

Further, the temperature control system of the optical machine further comprises a heat dissipation air passage 6, an inlet and an outlet of the heat dissipation air passage 6 are arranged on a housing 10 of the optical machine, the housing 10 is a relatively closed housing, an inlet for air inlet and an outlet for air outlet are formed on the wall surface of the housing 10, the housing 10 can integrally form the heat dissipation air passage 6, an inner cavity of the housing 10 forms a passage of the heat dissipation air passage 6, and the heat dissipation air passage 6 is simple in structure and easy to implement, as shown in fig. 3, a passage marked by thick lines in the drawing is the heat dissipation air passage 6. In contrast, the heat dissipation air passage 6 has no particularly high requirement for dust prevention, as long as an inlet for air inlet and an outlet for air outlet are formed in the wall surface of the housing 10, of course, a dust screen may be disposed on the inlet for air inlet of the housing 10, so as to reduce the impurity dust entering the housing 10 and avoid the accumulation of the impurity dust in the housing 10 to affect heat dissipation. The heat dissipation air passage 6 is mainly used for heat dissipation of other components except the display module 2 in the shell 10, external air enters the shell 10 from an inlet of the heat dissipation air passage 6, and air is discharged out of the shell 10 from an outlet of the heat dissipation air passage 6 after heat of the components is absorbed. The heat dissipation air duct 6 and the dustproof air duct 3 are relatively isolated passages, realize the regional heat dissipation of the inside of the optical machine, meet different heat dissipation demands, avoid the miscellaneous dust to influence the picture display effect when guaranteeing the radiating effect, the outlet of the dustproof air duct 3 is led to the inlet of the air duct 22 of the display module 2, and the outlet of the air duct 22 is integrated into the heat dissipation air duct 6, so that the air flow entering the inside of the optical machine from the dustproof air duct 3 is finally discharged outwards from the heat dissipation air duct 6 after absorbing the heat of the display unit 21.

In this embodiment, the second fan 51 and the light source heat exchange member 52 are disposed in the heat dissipation air duct 6, the second fan forms a stable air flow flowing along the heat dissipation air duct 6 in the heat dissipation air duct, so that heat can be efficiently dissipated, the air flow is discharged from the outlet of the heat dissipation air duct after absorbing the heat of the light source 4 during operation at the light source heat exchange member 52, the continuous stable heat dissipation effect of the light source 4 is ensured, specifically, the second fan 51 is disposed at the outlet of the heat dissipation air duct 6, the air inside the optical engine housing 10 can be efficiently pumped and discharged outwards, and the heat generated during operation of each component in the optical engine housing 10 can be effectively discharged outwards along with the air flow from the outlet of the heat dissipation air duct 6, so that the heat dissipation effect is improved.

Further, the hot-end heat exchange member 14 is disposed in the heat dissipation air duct 6, specifically, the hot-end heat exchange member 14 is disposed at the inlet of the heat dissipation air duct 6, the temperature of the hot end of the semiconductor refrigerator 11 will rise when the semiconductor refrigerator works, and the heat on the hot end is taken away by the air flow passing through the heat dissipation air duct 6, so that the hot end is ensured to be at a stable temperature, and the semiconductor refrigerator 11 is ensured to work stably for a long-term and stable refrigeration efficiency.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the utility model, and the scope of the utility model should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims

1. The utility model provides a ray apparatus temperature control system, its characterized in that, including refrigeration module (1) and display module assembly (2), display module assembly (2) are provided with and are used for carrying out radiating air flue (22) to display element (21) wherein, refrigeration module assembly (1) include semiconductor refrigerator (11) and fan one (12), the cold junction of semiconductor refrigerator (11) is provided with cold junction heat exchange piece (13), the hot junction of semiconductor refrigerator (11) is provided with hot junction heat exchange piece (14), air current that fan one (12) produced is led to behind cold junction heat exchange piece (13) the entry of air flue (22).

2. The temperature control system of an optical engine according to claim 1, wherein the cold end heat exchanging element (13) comprises a plurality of fins arranged at intervals, and a refrigerating air duct (131) for passing the air flow generated by the fan one (12) is formed between the fins.

3. The temperature control system of an optical machine according to claim 1, wherein the cold end and the cold end heat exchange piece (13) of the semiconductor refrigerator (11) and the hot end heat exchange piece (14) of the semiconductor refrigerator (11) are respectively bonded by heat conduction silver colloid.

4. The optomechanical temperature control system of claim 1, further comprising a dust-proof air duct (3), an inlet of the dust-proof air duct (3) being provided with a dust-proof filter (31), an outlet of the dust-proof air duct (3) being connected to an inlet of the air duct (22), the fan one (12) and the cold-end heat exchange element (13) being provided in the dust-proof air duct (3).

5. The temperature control system of any one of claims 1 to 4, further comprising a light source heat dissipation module (5), wherein the light source heat dissipation module (5) comprises a second fan (51) and a light source heat exchange member (52), the light source heat exchange member (52) is in heat conduction connection with the light source (4), and an air flow generated by the second fan (51) passes through the light source heat exchange member (52) to dissipate heat.

6. The optomechanical temperature control system of claim 5, wherein the outlet of the air duct (22) opens into the light source heat exchange element (52).

7. The temperature control system of an optical engine according to claim 5, further comprising a heat dissipation air duct (6), wherein an inlet and an outlet of the heat dissipation air duct (6) are provided on a housing (10) of the optical engine, and wherein the fan two (51) and the light source heat exchange member (52) are provided in the heat dissipation air duct (6).

8. The optomechanical temperature control system of claim 7, wherein the hot side heat exchanger (14) is arranged in a heat dissipation chimney (6).

9. The optomechanical temperature control system of one of claims 1 to 4, wherein the inlet and outlet of the air duct (22) are arranged on the long side of the display module (2).

10. The optomechanical temperature control system of one of claims 1 to 4, wherein dust-proof transparent plates (23) are respectively arranged on both side surfaces of the display unit (21) in the display module (2).