Light machine module of projector and projector

Abstract

The utility model discloses an optical machine module of a projector and the projector. The optical machine module comprises an internal circulation heat dissipation part and an external heat exchange part. A closed cavity is formed in an inner chamber of the inner circulation heat dissipation part, the closed cavity is arranged to be a curved air channel, the curved air channel is combined end to end to form a circulation channel, a power fan module is installed at one node of the circulation channel, and air in the circulation channel can be accelerated to circulate after the power fan module is powered on. An LCD screen module, heat insulation glass, a front Fresnel lens and a rear Fresnel lens are arranged in the circulation channel; the outer heat exchange part and the inner circulation heat dissipation part are integrated or fixed in an attached mode to form a heat exchange structure. According to the utility model, the LCD screen module and the heat insulation glass are packaged in the circulation channel, the circulation channel is dustless, and the optical machine module is clear in imaging and free of impurities. The light machine module is in a modular design, the assembling efficiency of the light machine module, the lens group and the light source group is high, and the yield is improved.

Description

Technical Field

[0001] This utility model relates to a projector, and more specifically to an optical engine module for a projector and a projector. Background Technology

[0002] Currently, the optical engine of a single LCD projector is an integrated optical engine consisting of a lens, LCD screen, front and rear Fresnel lenses, light source, and some heat dissipation components. The materials of the entire optical engine need to be cleaned before entering the cleanroom. The large amount of materials makes the cleanroom no longer completely clean, and the yield rate of the entire optical engine component has always been low due to dust spots.

[0003] In existing technologies, to improve the yield rate of the optical engine in LCD projectors, the heat dissipation module and the LCD screen are separated. However, this structure results in a bulky and large device. Another approach is to reduce the size of the heat dissipation unit, but this cannot guarantee the overall heat dissipation capacity of the optical engine.

[0004] The traditional assembly process for an optical engine module involves cleaning and dust removal of all materials before they enter a cleanroom. First, the internal components are installed into the optical engine housing. Then, the lens, heat exchanger, and light source / lamp board heat sink are assembled into a single unit. Finally, the axial exhaust fan and bracket are assembled into the complete optical engine assembly. This traditional assembly method has a high probability of resulting in small-diameter dust particles inside the optical engine, which can affect the projector's projection quality.

[0005] In view of this, it is necessary to improve the optical engine of the existing LCD projector. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention aims to provide an optical engine module for a projector and a projector in general. The purpose of designing this optical engine module is to achieve a dust-free internal structure, improve heat dissipation efficiency, and thus increase the installation yield of the optical engine module.

[0007] To solve the above technical problems, this utility model achieves the following solution: 1. An optical engine module for a projector, characterized in that the optical engine module is assembled in an integrated modular manner;

[0008] The optomechanical module includes an internal circulation heat dissipation unit and an external heat exchange component, wherein the internal circulation heat dissipation unit is provided with an internal heat exchange component;

[0009] The interior of the internal circulation heat dissipation section forms a closed cavity, which is configured as a circulation channel. At least one set of first power fan modules is installed at a node of the circulation channel. After the first power fan modules are powered on, they can accelerate the airflow in the circulation channel to accelerate heat dissipation.

[0010] The circulation channel is equipped with an LCD screen module, heat-insulating glass, a front Fresnel lens, and a rear Fresnel lens;

[0011] The outer heat exchange component and the inner heat exchange component are integrated into a heat exchange structure or are detachably connected to form a heat exchange structure.

[0012] Further, the outer heat exchange component comprises one or a combination of an air-cooled heat dissipation structure, a liquid-cooled heat dissipation module, and a semiconductor refrigeration sheet heat dissipation module.

[0013] Still further, the air-cooled heat dissipation structure comprises a heat sink and a second power fan module mounted on the heat sink, and the second power fan module is a turbine fan.

[0014] Still further, the liquid-cooled heat dissipation module comprises one or a combination of a water-cooled heat dissipation module and an oil-cooled heat dissipation module.

[0015] Still further, the semiconductor refrigeration sheet heat dissipation module comprises a semiconductor refrigeration sheet, a cold surface of which is fixedly attached to the inner heat exchange component, and a hot surface of which is outwardly provided with a heat sink or an air-cooled heat dissipation structure.

[0016] Further, the inner circulation heat dissipation part is further provided with a bracket assembly that is angularly connected to the inner heat exchange component.

[0017] Still further, the inner heat exchange component comprises:

[0018] a heat dissipation seat, one face of which is provided as a groove, and fins perpendicular to a bottom face of the groove are distributed in the groove at intervals, an outer end edge of each fin extends to and is flush with a slot of the groove on one side, and an installation groove is formed between the outer end edge of each fin and an inner wall of the groove, the first power fan module is installed in the installation groove, and a fan-shaped cavity is formed between the first power fan module and the fin at the flush slot, an air inlet formed by the fin at the flush slot is an air inlet, and an air inlet end of the first power fan module is opposite to the fin inner air duct at the installation groove.

[0019] a guide vane, which is installed in the fan-shaped cavity and separates the air inlet and an air outlet of the first power fan module, an inner arc face of the guide vane is a windward face, and the inner arc face is opposite to the air outlet of the first power fan module, so that the guide vane can change the air outlet direction of the first power fan module, and a first air duct is formed between the air inlet, the fin inner air duct, the first power fan module, and the inner arc cavity of the guide vane.

[0020] Still further, the first power fan module is a turbine fan.

[0021] Still further, the bracket assembly comprises:

[0022] Support, the support is an integral structure, has flat cover plate and two pieces of vertical plate, the flat cover plate is covered on the heat dissipation seat, one side edge is equipped with opening, two pieces of vertical plate are opposite and perpendicular and are equipped with on both sides of the opening, the opposite side of two pieces of vertical plate is equipped with multiple sets of guide grooves which are opposite and perpendicular to the flat cover plate, the LCD screen module and the heat insulation glass are slid and inserted in the middle two sets of guide grooves, the front and rear mirrors are slid and inserted in the outer two sets of guide grooves one by one.

[0023] Support cover, cover is connected to the two pieces of vertical plate, the support cover, the two pieces of vertical plate, the front mirror, the rear mirror and the LCD screen module form the second air duct of ''U'' type, the air inlet end of the second air duct and the air outlet of the first air duct are communicated, the air outlet end of the second air duct and the air inlet are communicated, and the heat insulation glass is in the air inlet channel of the second air duct.

[0024] Further, one of the vertical plates is provided with a side opening, and the side opening is encapsulated with a sealing cover.

[0025] The utility model discloses a projector, including light machine module.

[0026] Compared with the prior art, the utility model has the beneficial effects that:

[0027] 1. The utility model discloses a circulating channel that encapsulates LCD screen module and heat insulation glass, and the circulating channel is dust-free, and the light machine module forms clear image without impurities.

[0028] 2. The light machine module of the utility model is divided into two parts, which are an internal circulation heat dissipation part and an external heat exchange part respectively, and the circulating channel is arranged in the internal circulation heat dissipation part.

[0029] 3. The light machine module of the utility model is modularized, and the assembly efficiency of the light machine module, lens group and light source group is high, and the yield is improved. DRAWINGS

[0030] Figure 1 It is the three-dimensional structure diagram of the utility model horizontal light machine module.

[0031] Figure 2 It is the sectional view of the utility model horizontal light machine module.

[0032] Figure 3 It is the structure diagram of the utility model horizontal projector and inside.

[0033] Figure 4 It is the structure diagram of the utility model squatting projector and the assembly machine in the shell.

[0034] Figure 5 It is the assembly drawing of the utility model squatting light machine module.

[0035] Figure 6 It is the sectional view of the squatting type light machine module of the utility model.

[0036] Figure 7 It is the explosion view of the squatting type light machine module of the utility model.

[0037] Figure 8 It is the circulating air direction view of the internal circulation heat dissipation part of the utility model.

[0038] Figure 9 It is the heat dissipation seat structure view of the utility model.

[0039] Figure 10 It is the support structure view of the utility model.

[0040] Figure 11 It is the vertical type projector structure view of the utility model.

[0041] Figure 12 It is the circulating air duct structure view of the vertical type light machine module of the utility model.

[0042] Figure 13 It is the semiconductor refrigeration piece heat dissipation module installation structure view of the utility model.

[0043] Figure 14 It is the liquid cooling heat dissipation module structure view of the utility model.

[0044] Marked in the drawing: casing 1, light machine module 2, lens group 3, light source group 4, external heat exchange part 21, heat dissipation seat assembly 22, support assembly 23, radiator 211, second power fan module 212, heat dissipation seat 221, support 222, installation groove 223, power fan module 225, air inlet 226, air deflector 227, LCD screen module 231, second air duct 232, heat insulation glass 233, rear mirror 234, support cover 235, front mirror 236, semiconductor refrigeration piece heat dissipation module 2101, internal first heat dissipation pipe group 2102, water pump 2103, external fan heat dissipation pipe group 2104, flat cover plate 2221, vertical plate 2222, side opening 2223, guide groove 2224, opening 2225, vertical type projector 200, horizontal type projector 300. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, and the protection scope of the utility model can be more clearly and definitely defined. Obviously, the described embodiments of the utility model are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0046] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0047] Embodiment 1: The specific structure of the utility model is as follows:

[0048] Please refer to the drawings Figures 1-12 Taking the squat type light machine module as an example, the squat type light machine module is installed in the projector, the projector comprises a shell 1, a lens group 3 arranged in the shell 1 and a light source group 4 arranged in the shell 1, and the light source group 4 is used for emitting light.

[0049] The light machine module 2 is installed in the shell 1, and the light machine module 2 is integrally modularly assembled; the light machine module 2 is integrally modularly assembled; the light machine module 2 comprises an internal circulation heat dissipation part and an external heat exchange part 21, and the internal circulation heat dissipation part is provided with an internal heat exchange part 22;

[0050] A closed cavity is formed in the internal circulation heat dissipation part, the closed cavity is arranged as a circulation channel, at least one set of first power fan modules 225 is installed at a node of the circulation channel, the first power fan modules 225 can accelerate the circulation of air in the circulation channel to accelerate heat dissipation after being powered on; in the circulation channel, an LCD screen module 231, heat insulation glass 233, a front mirror 236 and a rear mirror 234 are arranged; the external heat exchange part 21 and the internal heat exchange part 22 are arranged as an integrated heat exchange structure, or the external heat exchange part 21 and the internal heat exchange part 22 are arranged as a heat exchange structure formed by detachable connection. The first power fan modules 225 can accelerate the circulation of air in the circulation channel to accelerate heat dissipation after being powered on. Since it is a closed cavity, the internal air is dust-free, so that the internal parts such as the LCD screen module 231, the heat insulation glass 233, the front mirror 236 and the rear mirror 234 are kept clean, and the projection effect is improved. Since the circulation channel is not communicated with the outside, the surfaces of the LCD screen module 231 and the heat insulation glass 233 will not stick dust, and the image is clear. After the projector is powered on, the heat generated by the projector is conducted to the external heat exchange part 21 through the internal circulation heat dissipation part, so as to improve the heat dissipation efficiency.

[0051] The outer heat exchange component 21 comprises one or a combination of air-cooled heat dissipation structure, liquid-cooled heat dissipation module, semiconductor refrigeration sheet heat dissipation module. The liquid-cooled heat dissipation module comprises one or a combination of water-cooled heat dissipation module, oil-cooled heat dissipation module.

[0052] The inner circulation heat dissipation part is further provided with a bracket assembly 23 which is connected to the inner heat exchange component 22 at an angle. Figure 5 As shown, the included angle between the heat dissipation seat assembly 22 and the bracket assembly 23 is 90 degrees.

[0053] Specifically, the heat dissipation seat assembly 22 comprises a heat dissipation seat 221 and a guide vane 227, and the power fan module 225 is installed in the heat dissipation seat 221. The power fan module 225 is preferably a turbine fan, which has one side for air intake and one side for air outlet.

[0054] The heat dissipation seat 221 is a square structure, and the material can be selected as an aluminum heat sink. One side of the heat dissipation seat 221 is provided as a groove, and vertical fins are distributed in the groove at intervals. The outer end of each fin extends to the groove and is flush with the groove. The outer end of each fin and the inner wall of the groove form an installation groove 223. The power fan module 225 is installed in the installation groove 223, and a fan-shaped cavity is formed between the power fan module 225 and the fin at the flush groove. The air inlet end of the power fan module 225 is opposite to the fin inner air duct at the installation groove 223, which is the air passage. Figure 4 As shown, the fan-shaped cavity is a right-angle fan-shaped cavity. The air inlet of the fin at the flush groove is the air inlet 226, and the air passage is air-intaked from the air inlet 226. The air in the air passage is discharged to the fan-shaped cavity by the power fan module 225.

[0055] The guide vane 227 is composed of an arc panel and two 90-degree fan-shaped panels, which are fixed at both ends of the arc panel and connected by the arc edges. The guide vane 227 functions to turn and isolate the air inlet end of the fin. The guide vane 227 is installed in the fan-shaped cavity and separates the air inlet 226 from the air outlet of the power fan module 225. The inner arc surface of the guide vane 227 is the windward surface, and the inner arc surface is opposite to the air outlet of the power fan module 225. Thus, the guide vane 227 can turn the air outlet direction of the power fan module 225. The air inlet 226, the inner air duct of each fin, the power fan module 225, and the inner arc cavity of the guide vane 227 form a first air duct. Figure 3 As shown, when the power fan module 225 is powered on, it draws air from the air passage and sends it into the cavity where the inner arc surface of the guide vane 227 is located. The air is turned by the guide vane 227 and enters the bracket assembly 23.

[0056] Specifically, the bracket assembly 23 includes a bracket 222, a front Fresnel lens 236, a rear Fresnel lens 234, and a bracket cover 235.

[0057] The bracket 222 is an integrated structure, comprising a flat cover plate 2221 and two upright plates 2222. The flat cover plate 2221 is a rectangular plate that covers the heat sink 221. One edge of the flat cover plate has an opening 2225. After the flat cover plate 2221 is fixed, the opening 2225 aligns with the air inlet and outlet of the heat sink assembly 22. One of the upright plates 2222 has a side opening 2223, which is sealed with a cap. The two upright plates 2222 are positioned opposite and perpendicular to each other on both sides of the opening 2225. The opposite sides of the two upright plates 2222 have multiple sets of opposite and perpendicular guide grooves 2224, totaling four sets. The LCD screen module 231 and the heat-insulating glass 233 slide into the two middle sets of guide grooves 2224; the front and rear Fresnel lenses 236 and 234 slide into the two outer sets of guide grooves 2224, respectively. Depend on Figure 5 As can be seen, the LCD screen module 231 separates the air inlet and outlet of the heat sink assembly 22. The bracket cover 235 is attached to the two upright plates 2222. The bracket cover 235, the two upright plates 2222, the front lens 236, the rear lens 234, and the LCD screen module 231 form a "U"-shaped second air duct 232. The air inlet of the second air duct is connected to the air outlet of the first air duct, and the air outlet of the second air duct is connected to the air inlet 226. The heat-insulating glass 233 is located in the air inlet channel of the second air duct.

[0058] like Figures 6-8 As shown, the structure of the entire circulation channel, in terms of airflow direction, consists of: an air passage within the fins, a corner passage at the inner arc surface of the air guide plate 227, a "U"-shaped second air duct 232, and finally returning from the air inlet 226 to the air passage within the fins. The entire circulation channel forms a closed space, and the exhaust air from the power fan module 225 accelerates the airflow within the circulation channel, achieving efficient heat dissipation.

[0059] Since the LCD screen module 231 generates heat after being powered on, the heat is carried by the power fan module 225 to the air passage inside the fins. The fins and heat sink 221 absorb the heat and cool the passing air. The heat sink 221 then conducts the heat to the external heat exchange unit 21.

[0060] Example 2:

[0061] The following is the structure of the external heat exchange section 21:

[0062] like Figure 7As shown, the outer heat exchange part 21 is taken as an example of a wind-cooled heat dissipation structure, and the outer heat exchange part 21 includes a heat sink 211 and a second power fan module 212 installed on the heat sink 211, and the second power fan module 212 is a turbine fan. One side of the heat sink 211 is a plane, and the other side is provided with heat dissipation fins, and the heat dissipation fins are provided with a slot for installing the second power fan module 212. The plane end of the heat sink 211 is fixedly attached to the outer bottom surface of the heat sink seat 221, and the second power fan module 212 is a structure with one end side air inlet and one side outward air exhaust. The heat sink 211 is an aluminum heat sink, which absorbs heat conducted from the heat sink seat 221 and then exhausts air through the second power fan module 212 to improve heat dissipation efficiency.

[0063] Embodiment 3:

[0064] The following is a structure description of the semiconductor refrigeration fin heat dissipation module 2101:

[0065] As shown in Figure 13 , the semiconductor refrigeration fin heat dissipation module 2101 includes a semiconductor refrigeration fin, the cold side of which is fixedly attached to the inner heat exchange part 22, and the hot side thereof is outwardly provided with a heat sink or a fan-cooled heat dissipation structure. One side of the heat sink is fixedly attached to the hot side of the semiconductor refrigeration fin, and the other side is provided with heat dissipation fins. The fan-cooled heat dissipation structure is provided with a fan in the heat sink. The semiconductor refrigeration fin is a TEC cooler.

[0066] Embodiment 4:

[0067] The above is a structure description of the liquid-cooled heat dissipation module, taken as an example of an oil-cooled heat dissipation module:

[0068] As shown in Figure 14 , the liquid-cooled heat dissipation module includes a first heat dissipation pipe group 2102, a water pump 2103, and an outer fan heat dissipation pipe group 2104, which are connected by pipelines to form a circulation loop. The first heat dissipation pipe group 2102 is arranged on the inner heat exchange part 22 and is used to absorb heat from the inner heat exchange part 22. The outer fan heat dissipation pipe group 2104 has a second heat dissipation pipe group, and a fan is installed on the second heat dissipation pipe group. The fan exhausts air towards the second heat dissipation pipe group, and the second heat dissipation pipe group is used for oil. The fan exhaust cools the heat dissipation pipe group, and the cooled oil is pumped back to the first heat dissipation pipe group 2102 by the water pump 2103.

[0069] Embodiment 4:

[0070] A projector includes the optical-mechanical module of embodiment 1.

[0071] Embodiment 5:

[0072] The utility model discloses an assembly method of light machine module, and the assembly method comprises the following steps:

[0073] Step one, the parts of the light machine module are dusted, cleaned and dried in a dustless workshop to obtain dustless parts, and the dustless parts comprise a radiator 211, a heat dissipation seat 221, a support 222, an air inlet 226, a wind deflector 227, an LCD screen module 231, heat insulation glass 233, a rear mirror 234, a support cover 235, a front mirror 236, a flat cover plate 2221 and a vertical plate 2222.

[0074] Step two, the rear mirror 234, the heat insulation glass 233, the LCD screen module 231 and the front mirror 236 are inserted into vertical grooves of the support 222, and cavities are formed between the rear mirror 234, the heat insulation glass 233, the LCD screen module 231 and the front mirror 236, and the front mirror 236 and the rear mirror 234 are located at two sides.

[0075] Step three, the support cover 235 is covered, and a U-shaped channel is formed between the support cover 235, the front mirror 236, the rear mirror 234, the LCD screen module 231 and two vertical sides of the support 222.

[0076] Step four, the power fan module 225 is assembled into the radiator 211 to form a heat dissipation seat assembly 22.

[0077] Step five, the heat dissipation seat assembly 22 is assembled with the support 222, and the heat dissipation seat assembly 22 and the U-shaped channel form a closed circulation channel, so that the closed circulation channel forms a dustless channel.

[0078] Step six, the outer heat exchange part 21 is assembled outside the heat dissipation seat assembly 22, and the assembly is completed.

[0079] The above operations are all independently completed in a dustless workshop, and finally the light machine module 2 is sent to a projector assembly workshop as a whole. The projector assembly workshop is also a dustless workshop. Through the above assembly mode, in the process of transporting and using the projector, the light machine module 2 is a closed structure and will not enter dust again, so that the projection quality is improved.

[0080] Example 4:

[0081] As shown in the figure, Figures 11-12 Figures 11-12 The utility model discloses a vertical projector 200, and the light machine module in the vertical projector 200 and the light machine module 2 of the squatting type of the utility model adopt the same design principle.

[0082] Example 5:

[0083] As shown in the figure, Figures 1-3 Figures 1-3 ​​The optical engine module in the horizontal projector 300 and the squatting type optical engine module 2 of the utility model adopt the same design principle.

[0084] In conclusion, the utility model discloses a LCD screen module and heat insulation glass are packaged in a circulating channel, and the circulating channel is dust-free, and the optical engine module is clear in imaging and has no impurities.

[0085] The above only is the preferred implementation of the utility model, and does not limit the patent range of the utility model, and equivalent structure or equivalent flow conversion of the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are all included in the patent protection range of the utility model.

Claims

1. An optical engine module for a projector, characterized in that, The optomechanical module (2) is assembled in an integrated modular form; The optomechanical module (2) includes an internal circulation heat dissipation unit and an external heat exchange component (21), wherein the internal circulation heat dissipation unit is provided with an internal heat exchange component (22). The interior of the internal circulation heat dissipation section forms a closed cavity, which is configured as a circulation channel. At least one set of first power fan modules (225) is installed at one node of the circulation channel. After the first power fan module (225) is powered on, it can accelerate the air circulation in the circulation channel to accelerate heat dissipation. The circulation channel is equipped with an LCD screen module (231), heat-insulating glass (233), a front Fresnel lens (236) and a rear Fresnel lens (234). The external heat exchange component (21) and the internal heat exchange component (22) are configured as an integrated heat exchange structure or the external heat exchange component (21) and the internal heat exchange component (22) are detachably connected to form a heat exchange structure.

2. The optical engine module of a projector according to claim 1, characterized in that, The external heat exchange component (21) includes one or a combination of an air-cooled heat dissipation structure, a liquid-cooled heat dissipation module, and a semiconductor refrigeration chip heat dissipation module.

3. The optical engine module of a projector according to claim 2, characterized in that, The air-cooled heat dissipation structure includes a heat sink (211) and a second power fan module (212) installed on the heat sink (211), wherein the second power fan module (212) is a turbo fan.

4. The optical engine module of a projector according to claim 2, characterized in that, The liquid cooling heat dissipation module includes one or a combination of water cooling heat dissipation module and oil cooling heat dissipation module.

5. The optical engine module of a projector according to claim 2, characterized in that, The semiconductor cooling chip heat dissipation module includes a semiconductor cooling chip, the cold side of which is attached and fixed to the internal heat exchange component (22), and the hot side of which is equipped with a heat sink or air-cooled heat dissipation structure.

6. The optical engine module of a projector according to claim 1, characterized in that, The internal circulation heat dissipation unit is further provided with a bracket assembly (23) that is connected at an angle to the internal heat exchange component (22), the internal heat exchange component (22) including: A heat sink (221) has one side formed as a groove. Fins perpendicular to the bottom surface of the groove are distributed at intervals in the groove. The outer edge of each fin extends towards the groove opening and is flush with the groove opening. The outer edge of each fin also forms a mounting groove (223) with the inner wall of the groove. The first power fan module (225) is installed in the mounting groove (223) and a fan-shaped cavity is formed between the first power fan module (225) and the fin flush with the groove opening. The air inlet formed by the fin flush with the groove opening is the air inlet (226). The air inlet end of the first power fan module (225) is directly opposite the air duct inside the fin at the mounting groove (223). A guide plate (227) is installed in the fan-shaped cavity and separates the air inlet (226) and the air outlet of the first power fan module (225). The inner arc surface of the guide plate (227) is the windward surface and the inner arc surface is opposite to the air outlet of the first power fan module (225). Thus, the guide plate (227) can turn the air outlet direction of the first power fan module (225). The air inlet (226), the inner air duct of each fin, the first power fan module (225) and the inner arc cavity of the guide plate (227) form a first air duct.

7. The optical engine module of a projector according to claim 6, characterized in that, The first power fan module (225) is a turbo fan.

8. The optical engine module of a projector according to claim 6, characterized in that, The support assembly (23) includes: The bracket (222) is an integral structure with a flat cover plate (2221) and two upright plates (2222). The flat cover plate (2221) covers the heat sink (221) and has an opening (2225) on one side edge. The two upright plates (2222) are arranged opposite and perpendicular to the opening (2225) on both sides. The opposite sides of the two upright plates (2222) are provided with multiple sets of opposite and perpendicular guide grooves (2224) to the flat cover plate (2221). The LCD screen module (231) and the heat insulation glass (233) are slidably inserted into the two sets of guide grooves (2224) in the middle. The front lens (236) and the rear lens (234) are slidably inserted into the two sets of guide grooves (2224) on the outside. The bracket cover (235) is attached to the two upright plates (2222). The bracket cover (235), the two upright plates (2222), the front mirror (236), the rear mirror (234) and the LCD screen module (231) form a "U"-shaped second air duct. The air inlet of the second air duct is connected to the air outlet of the first air duct, and the air outlet of the second air duct is connected to the air inlet (226). The heat-insulating glass (233) is located in the air inlet channel of the second air duct.

9. The optical engine module of a projector according to claim 8, characterized in that, One of the uprights (2222) has a side opening (2223) which is enclosed by a sealing cap.

10. A projector, characterized in that, Includes the optomechanical module as described in any one of claims 1-8.

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