Light machine module of projector and projector

Abstract

The invention discloses an optical machine module of a projector, the projector and an assembling method of the optical machine module. 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 invention, 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 ray machine module is in modular design, the assembling efficiency of the ray machine module, the lens group and the light source group is high, and the yield is improved.

Description

Technical Field

[0001] The present invention relates to a projector, and in particular to an optical-mechanical module of a projector and the projector. Background Art

[0002] Currently, the optical engine for a single LCD projector consists of a lens, LCD screen, front and rear mirrors, light source, and some heat dissipation components. This entire optical engine requires dust removal before entering the cleanroom. The large amount of material can make the cleanroom less dust-free, and the yield rate of the entire optical engine remains low due to dust spots within the unit.

[0003] In the prior art, to improve the yield of LCD projector optical engines, the heat dissipation module and the LCD screen are separated. However, this structure makes the machine bloated and bulky. Another approach is to reduce the heat dissipation volume, but this cannot guarantee the heat dissipation capacity of the entire optical engine.

[0004] The traditional optical engine module assembly process involves cleaning and dust removal of all materials. Once in a cleanroom, the internal components are first installed into the optical engine housing. Next, the lens, heat exchanger, light source, and heat sink are assembled. Finally, the axial-flow exhaust fan and bracket are added to complete the optical engine. This traditional assembly method is prone to small particles of dust inside the optical engine, which can affect the projector's performance.

[0005] In view of this, it is necessary to improve the LCD projector optical machine in the prior art. Summary of the Invention

[0006] In response to the shortcomings of the prior art, the present invention aims to provide an optical-mechanical module for a projector and a projector. The purpose of designing the optical-mechanical module is to ensure that the heat dissipation structure of the optical-mechanical module is dust-free inside the module, improve heat dissipation efficiency, and thereby increase the installation yield of the optical-mechanical module.

[0007] To solve the above technical problems, the present invention is implemented through the following solutions: 1. An optical-mechanical module of a projector, characterized in that the optical-mechanical module is assembled in an integrated modular manner; The optical machine module includes an internal circulation heat dissipation part and an external heat exchange component, wherein the internal circulation heat dissipation part is provided with an internal heat exchange component; A closed cavity is formed inside the internal circulation heat dissipation portion, and the closed cavity is configured as a circulation channel. At least one set of first power fan modules is installed at a node of the circulation channel. When the first power fan module is powered on, it can accelerate the circulation of air in the circulation channel to accelerate heat dissipation. In the circulation channel, there are LCD screen modules, heat-insulating glass, front mirrors and rear mirrors; The outer heat exchange component and the inner heat exchange component are configured as an integrated heat exchange structure, or the outer heat exchange component and the inner heat exchange component are configured as a heat exchange structure formed by detachable connection.

[0008] Furthermore, the external heat exchange component includes one or a combination of an air-cooled heat dissipation structure, a liquid-cooled heat dissipation module, and a semiconductor refrigeration plate heat dissipation module.

[0009] Furthermore, the air-cooled heat dissipation structure includes a radiator and a second power fan module installed on the radiator, and the second power fan module is a turbo fan.

[0010] Furthermore, the liquid cooling heat dissipation module includes one or a combination of a water cooling heat dissipation module and an oil cooling heat dissipation module.

[0011] Furthermore, the semiconductor refrigeration plate heat dissipation module includes a semiconductor refrigeration plate, the cold surface of the semiconductor refrigeration plate is fixedly attached to the internal heat exchange component, and the hot surface thereof is facing outward and is equipped with a radiator or an air-cooled heat dissipation structure.

[0012] Furthermore, the internal circulation heat dissipation part is also provided with a bracket assembly connected to the internal heat exchange component at an angle.

[0013] Furthermore, the internal heat exchange component includes: A heat sink, one side of which is configured as a trough body, in which fins perpendicular to the bottom surface of the trough body are distributed at intervals, and an outer end edge of each fin extends toward the notch of the trough body and is flush with the notch. The outer end edge of each fin also forms a mounting groove with the inner wall of the trough body, the first power fan module is installed in the mounting groove, and a fan-shaped cavity is formed between the first power fan module and the fins at the flush notch. The air outlet formed by the fins at the flush notch is an air inlet, and the air inlet end of the first power fan module faces the air duct inside the fins at the mounting groove; An air guide plate is installed in the fan-shaped cavity and separates the air inlet from the air outlet of the first power fan module. The inner arc surface of the air guide plate is the windward surface and the inner arc surface is opposite to the air outlet of the first power fan module, so that the air guide plate can turn the air outlet direction of the first power fan module, and a first air duct is formed between the air inlet, the inner air ducts of each fin, the first power fan module and the inner arc cavity of the air guide plate.

[0014] Furthermore, the first power fan module is a turbo fan.

[0015] Furthermore, the bracket assembly includes: The bracket is an integrated structure having a flat cover plate and two vertical plates. The flat cover plate is mounted on the heat sink and has an opening on one edge. The two vertical plates are arranged perpendicularly and oppositely on both sides of the opening. The opposite sides of the two vertical plates are provided with multiple sets of guide grooves that are opposite to each other and perpendicular to the flat cover plate. The LCD screen module and the heat-insulating glass are slidably inserted into the two sets of guide grooves in the middle, and the front and rear mirrors are slidably inserted one-to-one into the two sets of guide grooves on the outside. A bracket cover is connected to the two vertical plates. The bracket cover, the two vertical plates, the front mirror, the rear mirror and the LCD screen module form a "U"-shaped second air duct. The air inlet end of the second air duct is connected to the air outlet of the first air duct, and the air outlet end of the second air duct is connected to the air inlet. The insulating glass is located in the air inlet channel of the second air duct.

[0016] Furthermore, one of the vertical plates is provided with a side opening, and the side opening is enclosed with a sealing cover.

[0017] A projector of the present invention includes the optical-mechanical module.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention encapsulates the LCD screen module and the heat-insulating glass into a circulation channel, the circulation channel is dust-free, and the optical machine module has clear imaging and is free of impurities.

[0019] 2. The optical engine module of the present invention is divided into two parts, namely the internal circulation heat dissipation part and the external heat exchange part. The circulation channel is provided in the internal circulation heat dissipation part. The heat generated by the internal circulation heat dissipation part is transferred to the external heat exchange part to improve the heat dissipation capacity.

[0020] 3. The optical machine module of the present invention is modular in design, and its assembly efficiency with the lens group and light source group is high, thereby improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional structural diagram of the horizontal optical machine module of the present invention.

[0022] Figure 2 This is a cross-sectional view of the horizontal optical machine module of the present invention.

[0023] Figure 3 It is a structural diagram of the horizontal projector of the present invention and its interior.

[0024] Figure 4 This is a structural diagram of the housing of the squat projector of the present invention and the assembly unit inside the housing.

[0025] Figure 5 This is an assembly diagram of the squat optical machine module of the present invention.

[0026] Figure 6 This is a cross-sectional view of the squat optical machine module of the present invention.

[0027] Figure 7 This is an exploded view of the squat optical machine module of the present invention.

[0028] Figure 8 This is the circulation wind direction diagram of the internal circulation heat dissipation part of the present invention.

[0029] Figure 9 This is a structural diagram of the heat sink of the present invention.

[0030] Figure 10 This is a structural diagram of the bracket of the present invention.

[0031] Figure 11 It is a structural diagram of the vertical projector of the present invention.

[0032] Figure 12 This is a structural diagram of the circulating air duct of the vertical optical machine module of the present invention.

[0033] Figure 13 This is the installation structure diagram of the semiconductor refrigeration plate heat dissipation module of the present invention.

[0034] Figure 14 This is a structural diagram of the liquid cooling heat dissipation module of the present invention.

[0035] Markings in the accompanying drawings: casing 1, optical machine module 2, lens group 3, light source group 4, external heat exchange part 21, heat sink assembly 22, bracket assembly 23, radiator 211, second power fan module 212, heat sink 221, bracket 222, mounting slot 223, power fan module 225, air inlet 226, air guide plate 227, LCD screen module 231, second air duct 232, heat insulating glass 233, rear mirror 234, bracket cover 235, front mirror 236, semiconductor refrigeration chip heat dissipation module 2101, first internal heat dissipation pipe group 2102, water pump 2103, external fan heat dissipation pipe group 2104, flat cover 2221, vertical plate 2222, side opening 2223, guide groove 2224, opening 2225, vertical projector 200, horizontal projector 300. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the scope of protection of the present invention. Obviously, the embodiments described in the present invention are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] Example 1: The specific structure of the present invention is as follows: Please refer to the attached Figure 1-12 Taking the squat optical machine module as an example, the squat optical machine module is installed in the projector. The projector includes a casing 1, a lens group 3 arranged in the casing 1 and a light source group 4 arranged in the casing 1. The light source group 4 is used for emitting light.

[0039] The optical-mechanical module 2 is installed in the housing 1. The optical-mechanical module 2 is assembled in an integrated modular manner. The optical-mechanical module 2 includes an internal circulation heat dissipation portion and an external heat exchange component 21. The internal circulation heat dissipation portion is provided with an internal heat exchange component 22. The internal circulation heat dissipation unit forms a closed chamber, which is configured as a circulation channel. At least one first powered fan module 225 is installed at a node of the circulation channel. When powered on, the first powered fan module 225 accelerates the circulation of air within the circulation channel to accelerate heat dissipation. The circulation channel is equipped with an LCD screen module 231, insulating glass 233, front mirror 236, and rear mirror 234. The external heat exchange component 21 and the internal heat exchange component 22 are configured as an integrated heat exchange structure or a heat exchange structure formed by a detachable connection. When powered on, the first powered fan module 225 accelerates the circulation of air within the circulation channel to accelerate heat dissipation. Because the closed chamber is dust-free, the internal components, such as the LCD screen module 231, insulating glass 233, front mirror 236, and rear mirror 234, are kept clean, thereby improving projection quality. Since the circulation channel is not connected to the outside, dust will not stick to the surface of the LCD screen module 231 and the insulation glass 233, and the image will be clear. After the projector is powered on, the heat generated by it is transferred to the external heat exchange part 21 through the internal circulation heat dissipation part to improve the heat dissipation efficiency.

[0040] 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 plate heat dissipation module. The liquid-cooled heat dissipation module includes one or a combination of a water-cooled heat dissipation module and an oil-cooled heat dissipation module.

[0041] The inner circulation heat dissipation part is further provided with a bracket assembly 23 connected at an angle to the inner heat exchange component 22. Figure 5 As shown, the included angle between the heat sink assembly 22 and the bracket assembly 23 is 90 degrees.

[0042] Specifically, the heat sink assembly 22 includes a heat sink 221 and an air guide plate 227. The power fan module 225 is installed in the heat sink 221. The power fan module 225 is preferably a turbo fan. The turbo fan takes in air on one side and discharges air on the other side.

[0043] The heat sink 221 is a square structure, and the material can be an aluminum radiator. One side of the heat sink 221 is set as a trough body, and fins perpendicular to the bottom surface of the trough body are distributed at intervals in the trough body. The outer end edge of each fin extends toward the notch of the trough body and is level with the notch, forming an air passage between each fin; the outer end edge of each fin also forms a mounting groove 223 with the inner wall of the trough body, and the power fan module 225 is installed in the mounting groove 223 and a fan-shaped cavity is formed between the power fan module 225 and the fins at the level notch. The air inlet end of the power fan module 225 faces the fin inner air duct at the mounting groove 223, and the fin inner air duct is the air passage. Figure 4 As shown, the fan-shaped cavity is a right-angle fan-shaped cavity. The air outlet formed by the fins at the flat slot is the air inlet 226, that is, the air passage enters the air from the air inlet 226, and the air in the air passage is discharged to the fan-shaped cavity by the power fan module 225.

[0044] The air guide plate 227 is composed of an arc panel and two 90-degree fan-shaped plates, and the two 90-degree fan-shaped plates are fixed to the two ends of the arc panel and connected by arc edges. The function of the air guide plate 227 is to turn and isolate the air inlet end of the fin. The air guide plate 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 air guide plate 227 is the windward surface and the inner arc surface is opposite to the air outlet of the power fan module 225, so that the air guide plate 227 can turn the air outlet direction of the power fan module 225, and form a first air duct between the air inlet 226, the inner air ducts of each fin, the power fan module 225 and the inner arc cavity of the air guide plate 22. As Figure 3 As shown, when the power fan module 225 is powered on, it draws air from the air passage and sends the air into the cavity where the inner arc surface of the air guide plate 227 is located. The air is turned through the air guide plate 227 and enters the bracket assembly 23.

[0045] Specifically, the bracket assembly 23 includes a bracket 222 , a front mirror 236 , a rear mirror 234 , and a bracket cover 235 .

[0046] The bracket 222 is a one-piece structure, comprising a flat cover plate 2221 and two vertical plates 2222. The flat cover plate 2221 is a rectangular plate that covers the heat sink 221. An opening 2225 is defined on one edge of the plate. When the flat cover plate 2221 is secured, the opening 2225 aligns with the air inlet and outlet of the heat sink assembly 22. One of the vertical plates 2222 has a side opening 2223 enclosed by a sealing cover. The two vertical plates 2222 are positioned perpendicularly to each other along the length of the opening 2225. Four sets of guide grooves 2224 are defined on the opposing sides of the two vertical plates 2222, each set perpendicular to the flat cover plate 2221. The LCD screen module 231 and the insulating glass 233 slide into the two middle sets of guide grooves 2224; the front mirror 236 and the rear mirror 234 slide into the two outer sets of guide grooves 2224, respectively. Depend on Figure 5 As can be seen in the figure, the LCD screen module 231 separates the air inlet and outlet of the heat sink assembly 22. A bracket cover 235 is connected to the two vertical plates 2222. The bracket cover 235, the two vertical plates 2222, the front mirror 236, the rear mirror 234, and the LCD screen module 231 form a "U"-shaped second air duct 232. The air inlet end of this second air duct communicates with the air outlet of the first air duct, and the air outlet end of the second air duct communicates with the air inlet 226. The insulating glass 233 is located within the air inlet channel of the second air duct.

[0047] like Figure 6-8 As shown, the entire circulation channel, based on the airflow direction, is structured as follows: an air passage within the fins, a corner passage on the inner curved surface of air guide plate 227, a U-shaped second air passage 232, and finally, a return passage through air inlet 226 back to the air passage within the fins. The entire circulation channel forms a closed space, and exhaust air is exhausted through powered fan module 225, accelerating the airflow within the circulation channel and achieving efficient heat dissipation.

[0048] Since the LCD screen module 231 generates heat after being powered on, the heat is carried to the air passage in the fins by the power fan module 225 . The fins and the heat sink 221 absorb the heat and cool the passing air. The heat sink 221 transfers the heat to the external heat exchange part 21 .

[0049] Example 2: The structure of the external heat exchange part 21 is as follows: like Figure 7As shown, in the external heat exchange part 21, taking the air-cooled heat dissipation structure as an example, the external heat exchange part 21 includes a radiator 211 and a second power fan module 212 installed on the radiator 211, and the second power fan module 212 is a turbo fan. One side of the radiator 211 is a plane, and the other side is provided with heat dissipation fins. The heat dissipation fins are provided with slots for installing the second power fan module 212. The plane end of the radiator 211 and the outer bottom surface of the heat dissipation seat 221 are tightly fixed, and the second power fan module 212 is a structure with air intake at one end and air exhaust at the other end. The radiator 211 adopts an aluminum radiator, which absorbs the heat conducted from the heat dissipation seat 221, and then exhausts the air through the second power fan module 212, thereby improving the heat dissipation efficiency.

[0050] Example 3: The following is a structural description of the semiconductor refrigeration chip heat dissipation module 2101: like Figure 13 As shown, the semiconductor refrigeration chip heat dissipation module 2101 includes a semiconductor refrigeration chip, the cold surface of which is fixedly attached to the internal heat exchange component 22, and the hot surface of which is facing outward and is equipped with a radiator or an air-cooled heat dissipation structure with a fan. One side of the radiator is fixedly attached to the hot surface of the semiconductor refrigeration chip, and the other side is provided with cooling fins. The air-cooled heat dissipation structure with a fan has a fan installed in the radiator. The semiconductor refrigeration chip uses a TEC cooler.

[0051] Example 4: The above is a structural description of the liquid cooling module, taking the oil cooling module as an example: like Figure 14 As shown, the liquid cooling heat dissipation module includes a first heat dissipation tube group 2102, a water pump 2103, and an external fan heat dissipation tube group 2104. The first heat dissipation tube group 2102, the water pump 2103, and the external fan heat dissipation tube group 2104 are connected by pipelines to form a circulation loop. The first heat dissipation tube group 2102 is arranged in the internal heat exchange component 22, which is used to absorb the heat of the internal heat exchange component 22. The external fan heat dissipation tube group 2104 has a second heat dissipation tube group. A fan is installed on the second heat dissipation tube group. The exhaust direction of the fan is toward the second heat dissipation tube group. The second heat dissipation tube group is used for oil passing. The fan exhaust cools the heat dissipation tube group. The cooled oil is pumped back to the first heat dissipation tube group 2102 through the water pump 2103.

[0052] Example 4: A projector includes the optical-mechanical module described in Example 1.

[0053] Example 5: The present invention provides an assembly method for an optical machine module, the assembly method comprising the following steps: Step 1: The components of the optical machine module are dusted, cleaned, and dried in a dust-free workshop to obtain dust-free components, which include a radiator 211, a heat sink 221, a bracket 222, an air inlet 226, an air guide plate 227, an LCD screen module 231, a heat-insulating glass 233, a rear mirror 234, a bracket cover 235, a front mirror 236, a flat cover plate 2221, and a vertical plate 2222; Step 2: Insert the rear mirror 234, the insulating glass 233, the LCD screen module 231, and the front mirror 236 into the vertical slots of the bracket 222. There are cavities between the rear mirror 234, the insulating glass 233, the LCD screen module 231, and the front mirror 236. The front mirror 236 and the rear mirror 234 are located on both sides. Step 3: Cover the bracket cover 235 to form a U-shaped channel between the bracket cover 235, the front mirror 236, the rear mirror 234, the LCD screen module 231 and the two vertical sides of the bracket 222; Step 4: The power fan module 225 is installed into the radiator 211 to form the heat sink assembly 22; Step 5: Assemble the heat sink assembly 22 and the bracket 222. The heat sink assembly 22 and the U-shaped channel form a closed circulation channel, thereby forming the closed circulation channel into a dust-free channel. Step 6: Install the external heat exchange part 21 on the outside of the heat sink assembly 22 to complete the assembly.

[0054] All of the above operations are completed independently in a clean room, and the resulting optical-mechanical module 2 is then delivered to the projector assembly workshop, which is also a clean room. This assembly method prevents dust from entering the optical-mechanical module 2 during transportation and use, improving projection quality.

[0055] Example 4: like Figure 11-12 As shown, Figure 11-12 This is a standing projector 200 of the present invention, and the optical-mechanical module inside it adopts the same design principle as the squatting optical-mechanical module 2 of the present invention.

[0056] Example 5: like Figure 1-3 As shown, Figure 1-3 This is the horizontal projector 300 of the present invention, and the optical-mechanical module inside it adopts the same design principle as the squat optical-mechanical module 2 of the present invention.

[0057] In summary, the present invention encapsulates the LCD screen module and the insulating glass into a circulation channel. The circulation channel is dust-free, and the optical machine module has clear imaging and is free of impurities. The optical machine module of the present invention is divided into two parts, namely the internal circulation heat dissipation part and the external heat exchange part. The circulation channel is provided in the internal circulation heat dissipation part, and the heat emitted by the internal circulation heat dissipation part is transferred to the external heat exchange part to improve the heat dissipation capacity. The optical machine module of the present invention is a modular design, and its assembly efficiency with the lens group and the light source group is high, thereby improving the yield rate.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. An optical-mechanical module for a projector, characterized in that: The optical-mechanical module (2) is assembled in an integrated modular manner; The optical machine module (2) comprises an internal circulation heat dissipation part and an external heat exchange component (21), wherein the internal circulation heat dissipation part is provided with an internal heat exchange component (22); A closed cavity is formed inside the internal circulation heat dissipation part, and the closed cavity is configured as a circulation channel. At least one group of first power fan modules (225) is installed at a node of the circulation channel. When the first power fan module (225) is powered on, it can accelerate the circulation of air in the circulation channel to accelerate heat dissipation; An LCD screen module (231), a heat-insulating glass (233), a front mirror (236) and a rear mirror (234) are arranged in the circulation channel; The external heat exchange component (21) and the internal heat exchange component (22) are provided as an integrated heat exchange structure, or the external heat exchange component (21) and the internal heat exchange component (22) are provided as a heat exchange structure formed by detachable connection.

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

3. The optical-mechanical module of a projector according to claim 2, characterized in that: The air-cooling heat dissipation structure comprises a radiator (211) and a second power fan module (212) installed on the radiator (211), and the second power fan module (212) is a turbo fan.

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

5. The optical-mechanical module of a projector according to claim 2, characterized in that: The semiconductor refrigeration plate heat dissipation module comprises a semiconductor refrigeration plate, the cold surface of the semiconductor refrigeration plate is fitted and fixed to the internal heat exchange component (22), and the hot surface of the semiconductor refrigeration plate is facing outward and is equipped with a radiator or an air-cooled heat dissipation structure.

6. The optical-mechanical module of a projector according to claim 1, characterized in that: The internal circulation heat dissipation portion is also provided with a bracket assembly (23) connected to the internal heat exchange component (22) at an angle; The internal heat exchange component (22) comprises: A heat sink (221), one side of the heat sink (221) being configured as a slot body, fins perpendicular to the bottom surface of the slot body being distributed at intervals in the slot body, the outer end edge of each fin extending toward the slot of the slot body and being flush with the slot, the outer end edge of each fin also forming a mounting slot (223) with the inner wall of the slot body, the first power fan module (225) being mounted in the mounting slot (223), and a fan-shaped cavity being formed between the first power fan module (225) and the fins at the flush slot, the air outlet formed by the fins at the flush slot being an air inlet (226), and the air inlet end of the first power fan module (225) facing the air duct inside the fins at the mounting slot (223); An air guide plate (227) is installed in the fan-shaped cavity and separates the air inlet (226) from the air outlet of the first power fan module (225); the inner arc surface of the air guide plate (227) is a windward surface and the inner arc surface is opposite to the air outlet of the first power fan module (225), so that the air guide plate (227) can turn the air outlet direction of the first power fan module (225), and a first air duct is formed between the air inlet (226), the inner air ducts of each fin, the first power fan module (225) and the inner arc cavity of the air guide plate (22).

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

8. The optical-mechanical module of a projector according to claim 6, characterized in that: The support assembly (23) comprises: A bracket (222), the bracket (222) being an integrated structure, comprising a flat cover plate (2221) and two vertical plates (2222), the flat cover plate (2221) being covered on the heat sink (221), and having an opening (2225) on one side edge thereof, the two vertical plates (2222) being arranged oppositely and vertically on two sides of the opening (2225), the opposite sides of the two vertical plates (2222) being provided with a plurality of groups of guide grooves (2224) opposite to and perpendicular to the flat cover plate (2221), the LCD screen module (231) and the heat insulating glass (233) being slidably inserted into the two middle groups of guide grooves (2224), and the front mirror (236) and the rear mirror (234) being slidably inserted into the two outer groups of guide grooves (2224) one by one; A support cover (235) is connected to the two vertical plates (2222); the support cover (235), the two vertical 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 end of the second air duct is connected to the air outlet of the first air duct, the air outlet end of the second air duct is connected to the air inlet (226), and the heat-insulating glass (233) is located in the air inlet channel of the second air duct.

9. The optical-mechanical module of a projector according to claim 8, characterized in that: One of the vertical plates (2222) is provided with a side opening (2223), and the side opening (2223) is enclosed with a sealing cover.

10. A projector, characterized in that: An optical-mechanical module comprising any one of claims 1-8.

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