projector

Abstract

The present invention discloses a projector, comprising a projection optical engine, a heat dissipation assembly, and an air guide. The projection optical engine is provided with a cavity and an inlet and an outlet communicating with the cavity. The heat dissipation assembly is provided with an air outlet. The air guide is provided with an air guide channel. One end of the air guide is communicated with the air outlet, and the other end of the air guide is communicated with the inlet, so that the air outlet, the air guide channel, the inlet, the cavity, and the outlet form a heat dissipation channel. The present invention aims to provide a projector that effectively avoids the phenomenon of thermal defocusing. The projector can not only reduce the volume of the overall heat dissipation system, but also significantly reduce the temperature of the lenses inside the optical engine, avoiding the occurrence of thermal defocusing and the burning of plastic lenses. At the same time, it can also reduce the dirt on the optical lenses and improve the brightness of the optical engine.

Description

Technical Field

[0001] The present invention relates to the technical field of projection equipment, and in particular to a projector. Background Art

[0002] Micro-projection technology is a new, modern projection display technology. Its miniaturization and lightweight nature have gradually made it a part of people's lives. In today's rapidly developing information age, it is gaining increasing popularity and becoming a major development trend in projection display. DLP projection displays offer high brightness, high contrast, and high resolution. Combined with new LED light sources, they enable miniaturized, portable micro-projections, meeting people's demand for portable projection displays.

[0003] In related technologies, when the projection light machine in the projection equipment is working, the continuous irradiation of the light beam of the light machine's LED lamp will generate a large amount of heat, causing the LED lamp to be in a high temperature state, affecting the life of the LED lamp. At the same time, the projection light machine will also absorb this part of the heat to expand and deform, causing the optical lens in the projection light machine to shift, affecting the offset of the light path. When the degree of deviation of the optical lens is large, the image projected by the light machine will be blurred and unclear, resulting in a thermal defocus phenomenon, making the display quality of the projection light machine less than expected.

[0004] Furthermore, due to processing cycles, processes, and costs, most current projectors contain some plastic lenses. Plastic lenses are sensitive to temperature, and continuous exposure to LED light beams can cause them to heat up, potentially leading to cracking and melting, which can also cause poor resolution in the projector or even damage the equipment. Furthermore, during the assembly process, due to a variety of factors, including the assembly environment and operator handling, some suspended particles in the air can adhere to the optical lenses, causing them to become contaminated and significantly affecting the brightness of the projector. Summary of the Invention

[0005] The main purpose of the present invention is to provide a projector, aiming to provide a projector that effectively avoids the thermal defocus phenomenon. The projector can not only reduce the volume of the overall heat dissipation system, but also greatly reduce the temperature of the lenses inside the optical machine, avoid the thermal defocus phenomenon and the burning of plastic lenses, and at the same time reduce the dirt of the optical lenses and improve the brightness of the optical machine.

[0006] To achieve the above object, the present invention provides a projector, comprising:

[0007] A projection light engine, the projection light engine being provided with a cavity and an inlet and an outlet communicating with the cavity;

[0008] a heat dissipation component, wherein the heat dissipation component is provided with an air outlet; and

[0009] An air guide member is provided with an air guide channel, one end of the air guide member is connected to the air outlet, and the other end of the air guide member is connected to the inlet, so that the air outlet, the air guide channel, the inlet, the cavity and the outlet form a heat dissipation channel.

[0010] In one embodiment, the air guide member includes a first connecting end, a connecting tube and a second connecting end connected in sequence, the air guide channel passes through the first connecting end, the connecting tube and the second connecting end, the first connecting end is connected to the projection light engine and is arranged corresponding to the inlet, and the second connecting end is connected to the heat dissipation component and is arranged corresponding to the air outlet.

[0011] In one embodiment, a connecting platform is provided on the periphery of the first connecting end, a boss is provided around the inlet of the projection light engine, and the connecting platform is connected to the boss via a fastener;

[0012] And / or, a connection stop edge is provided on the periphery of the second connection end, the heat dissipation assembly is provided with a connection portion adjacent to the air outlet, and the connection stop edge is connected to the connection portion via a fixing member;

[0013] And / or, the cross-sectional area of ​​the opening of the first connection end is the same as or different from the cross-sectional area of ​​the opening of the second connection end;

[0014] And / or, the opening shape of the first connection end is the same as or different from the opening shape of the second connection end.

[0015] In one embodiment, the projection light engine is provided with a plurality of the outlets, so as to form a plurality of air flow channels in the cavity;

[0016] And / or, the inlet and the outlet are arranged on opposite sides of the projection light engine;

[0017] And / or, the heat dissipation component is further provided with an air suction port, and the outlet is arranged corresponding to the air suction port.

[0018] In one embodiment, the projection light engine is further provided with a dustproof part, and the dustproof part is provided at the inlet and / or the outlet.

[0019] In one embodiment, the dustproof member is a dustproof breathable membrane;

[0020] And / or, the projection light engine is further provided with a limiting groove around the inlet and / or the outlet, and the dustproof part is accommodated and limited in the limiting groove.

[0021] In one embodiment, the projection light engine comprises:

[0022] a housing, wherein the housing is provided with the cavity and the inlet and the outlet communicating with the cavity;

[0023] a light source, disposed in the cavity and configured to emit light;

[0024] a lens assembly, the lens assembly being disposed in the cavity and spaced apart from the light source; and

[0025] a lens assembly, one end of which is disposed through the housing and extends into the cavity;

[0026] The light emitted by the light source is refracted by the lens assembly and emitted from the lens assembly.

[0027] In one embodiment, the light source is an LED lamp;

[0028] And / or, the lens assembly includes at least one optical lens;

[0029] And / or, the projection optical engine further includes a digital micromirror device, which is disposed in the cavity and spaced apart from the light source and the lens assembly.

[0030] In one embodiment, the heat dissipation component includes:

[0031] a fan having an air intake and the air outlet; and

[0032] The radiator includes an abutting end, a heat dissipation pipe and heat dissipation fins. The abutting end is attached to the outer wall of the projector light machine, one end of the heat dissipation pipe is connected to the abutting end, and the other end of the heat dissipation pipe is connected to the heat dissipation fins. The heat dissipation fins are arranged corresponding to the air outlet and are arranged adjacent to the air guide.

[0033] In one embodiment, the fan is a centrifugal fan;

[0034] And / or, the heat dissipation fins include a plurality of heat dissipation fins, which are spaced apart and arranged in parallel on an end of the heat dissipation pipe away from the abutting end and corresponding to the air outlet;

[0035] And / or, the heat dissipation fins are in a zigzag shape, a wave shape, or a sawtooth shape;

[0036] And / or, the projector also includes a shell, the shell is provided with an installation cavity and a vent connected to the installation cavity, the projection optical engine, the heat dissipation assembly and the air guide are all arranged in the installation cavity, and the air intake port is correspondingly connected to the vent.

[0037] The projector of the technical solution of the present invention opens an inlet and an outlet connected to the cavity on the projection light engine, and provides an air guide member with an air guide channel, one end of the air guide member is connected to the air outlet of the heat dissipation component, and the other end of the air guide member is connected to the inlet of the projection light engine, so that the projector connects the air outlet of the heat dissipation component with the cavity of the projection light engine through the air guide member, thereby forming a heat dissipation channel by utilizing the air outlet, the air guide channel, the inlet, the cavity and the outlet, so as to realize that a cold air flow is blown out by part of the air outlet of the heat dissipation component through the heat dissipation channel to dissipate heat to the inside of the cavity of the projection light engine, thereby effectively reducing the temperature of the projection light engine, greatly reducing the temperature of the lens inside the projection light engine, avoiding the occurrence of thermal defocusing and burning of plastic lenses, and improving display quality; at the same time, no additional heat dissipation structure is added, thereby reducing the volume of the overall heat dissipation system of the projector, and when the cold air flow in the heat dissipation channel circulates in the cavity, the air flow passing over the optical lens will also have a certain cleaning effect on the optical lens, reducing the dirt of the optical lens and improving the brightness of the light engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0039] Figure 1 A schematic structural diagram of a projector according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic structural diagram of a projector without a housing in one embodiment of the present invention;

[0041] Figure 3 A partial cross-sectional schematic diagram of a projector without a housing according to an embodiment of the present invention;

[0042] Figure 4 A schematic structural diagram of a projection optical engine according to an embodiment of the present invention;

[0043] Figure 5 A schematic structural diagram of a projection optical engine from another perspective in one embodiment of the present invention;

[0044] Figure 6 A schematic diagram of a partial structure of a fan in one embodiment of the present invention;

[0045] Figure 7 This is a schematic structural diagram of a radiator in one embodiment of the present invention;

[0046] Figure 8 This is a schematic structural diagram of a heat dissipation fin according to an embodiment of the present invention;

[0047] Figure 9 Schematic diagram of the structure of an air guide member in one embodiment of the present invention.

[0048] Description of Figure Numbers:

[0049]

[0050] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0052] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0054] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] Micro-projection technology is a new, modern projection display technology. Its miniaturization and lightweight nature have gradually made it a part of people's lives. In today's rapidly developing information age, it is gaining increasing popularity and becoming a major development trend in projection display. DLP projection displays offer high brightness, high contrast, and high resolution. Combined with new LED light sources, they enable miniaturized, portable micro-projections, meeting people's demand for portable projection displays.

[0056] In the related art, when the projection machine in the projection equipment is working, the continuous irradiation of the light beam from the machine's LED lamp generates a large amount of heat, causing the LED lamp to be in a high temperature state, which affects the life of the LED lamp. At the same time, the projection machine will also absorb this part of the heat and expand and deform, causing the optical lens in the projection machine to shift, affecting the offset of the light path. When the degree of deviation of the optical lens is large, the image projected by the machine will be blurred and unclear. This phenomenon is called thermal defocus. Because the thermal expansion coefficient of plastic is relatively large compared to that of metal, when the main body of the projection machine is made of plastic, the deformation of the plastic body due to heat causes the optical lens to shift to a large extent, resulting in thermal defocus, making the display quality of the projection machine less than expected.

[0057] Furthermore, due to processing cycles, processes, and costs, most current projectors contain some plastic lenses. Plastic lenses are sensitive to temperature, and continuous exposure to LED light beams can cause them to heat up, potentially leading to cracking and melting, which can also cause poor resolution in the projector or even damage the equipment. Furthermore, during the assembly process, due to a variety of factors, including the assembly environment and operator handling, some suspended particles in the air can adhere to the optical lenses, causing them to become contaminated and significantly affecting the brightness of the projector.

[0058] Based on the above concepts and problems, the present invention proposes a projector 100. It is understood that the projector 100 is applied to a projection device, which uses a projection light engine of the projector 100 to emit light, which is then emitted from a lens through reflection, refraction, etc. of an optical lens and projected onto a wall, canvas, or screen to facilitate user viewing and improve the viewing experience.

[0059] It is understood that the projection device also includes a remote control device or mobile terminal for controlling the projector 100. That is, the projector 100 is connected to the remote control device or mobile terminal via a signal connection or an electrical connection, which is not limited here. Of course, control buttons can also be directly set on the projector 100 to facilitate control of the projector 100.

[0060] Please refer to Figures 1 to 9 As shown, in an embodiment of the present invention, the projector 100 includes a projection optical engine 2, a heat dissipation component 3 and an air guide member 4, wherein the projection optical engine 2 is provided with a cavity 211 and an inlet 212 and an outlet 213 connected to the cavity 211, the heat dissipation component 3 is provided with an air outlet 311, and the air guide member 4 is provided with an air guide channel 41, one end of the air guide member 4 is connected to the air outlet 311, and the other end of the air guide member 4 is connected to the inlet 212, so that the air outlet 311, the air guide channel 41, the inlet 212, the cavity 211 and the outlet 213 form a heat dissipation channel.

[0061] In this embodiment, the projector 100 may be a DLP digital projector, etc. The projection light engine 2 of the projector 100 is used to emit projection light. The projector 100 also includes structures such as a control circuit or circuit board for signal transmission and control. The heat dissipation component 3 of the projector 100 can be used to dissipate heat for the entire system of the projector 100, such as the projection light engine 2 of the projector 100, the control circuit or circuit board, the power supply, or other components capable of generating heat, etc., which are not limited here. Optionally, the heat dissipation component 3 can be a radiator or other component capable of achieving a heat dissipation effect, which is not limited here.

[0062] To enhance the aesthetics of projector 100 and to facilitate installation, securing, protection, and support of the projection engine 2, heat sink assembly 3, and air guide 4, projector 100 further includes a housing 1 having a mounting cavity within which the projection engine 2, heat sink assembly 3, and air guide 4 are located. As will be appreciated, housing 1 includes a light outlet to facilitate smooth projection or emission of light from the projection engine 2. The light outlet may be a through-hole structure, a visible window, or a transparent window structure, without limitation herein.

[0063] In this embodiment, an air guide 4 is provided, and an inlet 212 and an outlet 213 connected to the cavity 211 are provided on the projector 2, so that the inlet 212, the cavity 211 and the outlet 213 cooperate to form an air duct or a flow channel, and the air guide 4 is used to connect the air outlet 311 of the heat dissipation component 3 with the inlet 212 of the projector 2, so that the air outlet 311, the air guide channel 41, the inlet 212, the cavity 211 and the outlet 213 of the heat dissipation component 3 form a heat dissipation channel, thereby utilizing the heat dissipation channel to dissipate heat from the cavity 211 of the projector 2, so as to effectively reduce the temperature of the internal components of the cavity 211 of the projector 2.

[0064] It is understandable that by providing the air guide 4, a specially structured return air system is formed inside the projector 100 using the air guide 4, so that part of the airflow originally blown out from the heat dissipation assembly 3 for cooling the internal components of the projector 100, the projection light engine 2, etc., is directly separated and enters the cavity 211 of the projection light engine 2 through the air guide 4, and cooperates with the inlet 212, the cavity 211 and the outlet 213 on the projection light engine 2 to form an air duct or flow channel, so as to achieve the heat generated by the continuous irradiation of the LED light beam inside the cavity 211 of the projection light engine 2. The heat is discharged from the outlet 213 of the air duct or flow channel by forced convection, which can effectively avoid the occurrence of thermal defocusing and the burning of plastic lenses. At the same time, the airflow in the cavity 211 passing over the optical lens will also play a certain cleaning role on the optical lens, reduce the dirt on the optical lens, and improve the brightness of the light engine.

[0065] In this embodiment, the air guide 4 can be a tubular or cylindrical structure. The air guide 4 is used to guide the air blown out from the air outlet 311 of the heat dissipation assembly 3 through the air guide channel 41 of the air guide 4 to the cavity 211 of the projector 2, thereby dissipating heat and cooling the components in the cavity 211, and finally discharging the air from the outlet 213. It can be understood that such a configuration effectively avoids the need for additional heat dissipation structures or cooling structures inside or outside the projector 2, thereby reducing the overall heat dissipation system volume of the projector 100; at the same time, the cold air flow directly enters the interior of the projector 2 to cool the components, thereby significantly reducing the temperature of the lens inside the projector 2, which can effectively improve the heat dissipation performance and display quality of the projector 100.

[0066] The projector 100 of the present invention is provided with an inlet 212 and an outlet 213 communicating with the cavity 211 on the projection light engine 2, and an air guide 4 having an air guide channel 41 is provided. One end of the air guide 4 is communicated with the air outlet 311 of the heat dissipation component 3, and the other end of the air guide 4 is communicated with the inlet 212 of the projection light engine 2. The projector 100 connects the air outlet 311 of the heat dissipation component 3 with the cavity 211 of the projection light engine 2 through the air guide 4, thereby forming a heat dissipation channel by using the air outlet 311, the air guide channel 41, the inlet 212, the cavity 211 and the outlet 213, so as to realize the heat dissipation of the heat dissipation component 3. The cold air flow blown out from the partial air outlet 311 of 3 is blown through the heat dissipation channel to dissipate heat inside the cavity 211 of the projection light engine 2, thereby effectively reducing the temperature of the projection light engine 2 and greatly reducing the temperature of the lens inside the projection light engine 2, so as to avoid the occurrence of thermal defocusing and burning of the plastic lens, thereby improving the display quality; at the same time, no additional heat dissipation structure is added, thereby reducing the volume of the overall heat dissipation system of the projector 100, and when the cold air flow in the heat dissipation channel circulates in the cavity 211, the air flow passing over the optical lens will also have a certain cleaning effect on the optical lens, thereby reducing the dirt on the optical lens and improving the brightness of the light engine.

[0067] In one embodiment, the air guide member 4 includes a first connection end 42, a connection tube 43 and a second connection end 44 connected in sequence, and the air guide channel 41 passes through the first connection end 42, the connection tube 43 and the second connection end 44. The first connection end 42 is connected to the projection light machine 2 and is arranged corresponding to the inlet 212. The second connection end 44 is connected to the heat dissipation component 3 and is arranged corresponding to the air outlet 311.

[0068] In this embodiment, if Figure 2 and Figure 9 As shown, by connecting the first connection end 42 and the second connection end 44 at both ends of the connecting tube 43 of the air guide member 4, the air guide member 4 is connected to the projection light machine 2 and the heat dissipation component 3 through the first connection end 42 and the second connection end 44 respectively, so as to improve the connection stability.

[0069] As will be appreciated, to further enhance the stability of the installation between the air guide 4 and the projector 2, a connecting platform 421 is provided around the periphery of the first connecting end 42. The projector 2 is provided with a boss 214 surrounding the inlet 212. The connecting platform 421 is connected to the boss 214 via a fastener. In this embodiment, the connecting platform 421 of the first connecting end 42 may be provided with a through-hole, and the boss 214 may be provided with a corresponding through-hole. The fastener is thus sequentially inserted through the through-hole and the through-hole to achieve a secure connection between the connecting platform 421 and the boss 214. Alternatively, the fastener may be a screw or a pin.

[0070] Of course, in order to facilitate the disassembly and assembly of the air guide 4, the air guide 4 and the projection optical machine 2 / heat dissipation assembly 3 can also adopt a detachable connection structure, such as a snap connection, plug-in connection, screw connection or pin connection, etc., which is not limited here.

[0071] As will be appreciated, to further enhance the installation stability of the air guide 4 and the heat dissipation assembly 3, a connecting edge 441 is provided around the periphery of the second connecting end 44. The heat dissipation assembly 3 is provided with a connecting portion 313 adjacent to the air outlet 311. The connecting edge 441 is connected to the connecting portion 313 via a fixing member. In this embodiment, the connecting edge 441 of the second connecting end 44 may be provided with a through-hole, and the connecting portion 313 of the heat dissipation assembly 3 may be provided with a corresponding through-hole. The fixing member is thus sequentially inserted through the through-hole and the through-hole to achieve a secure connection between the connecting edge 441 and the connecting portion 313. Alternatively, the fixing member may be a screw or a pin.

[0072] In this embodiment, the air guide member 4 can be a bent tube structure, such as a U-shaped tube, a Z-shaped tube or other irregular shapes, which are not limited here. Optionally, the cross-sectional shape of the air guide channel 41 of the air guide member 4 can be a polygonal or irregular structure such as a circle, an ellipse, a triangle, a square, etc., which are not limited here. It can be understood that the structural shape of the air guide member 4, the opening shape and size of the first connection end 42 and the second connection end 44 are flexible and can be determined according to the actual air outlet 311 of the heat dissipation component 3, the inlet 212 of the projection light machine 2 and the overall structure of the entire projector 100, which are not limited here.

[0073] Optionally, the cross-sectional area of ​​the opening of the first connection end 42 is the same as or different from the cross-sectional area of ​​the opening of the second connection end 44. The shape of the opening of the first connection end 42 is the same as or different from the shape of the opening of the second connection end 44.

[0074] In one embodiment, the light projector 2 is provided with a plurality of outlets 213 to form a plurality of airflow channels within the cavity 211. It is understood that by providing the plurality of outlets 213 on the light projector 2, the airflow introduced from the inlet 212 by the air guide 4 is discharged from the plurality of outlets 213 within the cavity 211, thereby forming a plurality of air ducts or airflow channels.

[0075] It should be noted that the number, location, and size of the outlets 213 on the projection light engine 2 are flexible and can be determined based on the actual shape of the projection light engine 2 and the specific location of the plastic lens that requires heat dissipation, and are not limited here. Optionally, the inlet 212 and outlet 213 are located on opposite sides of the projection light engine 2.

[0076] In this embodiment, in order to rationally plan the internal space of the projector 100, the heat dissipation component 3 is arranged above or below the projection optical machine 2. The heat dissipation component 3 has an air intake port 312, so that the heat dissipation component 3 inhales air through the air intake port 312 and blows it out through the air outlet 311 under the action of the air intake port 312 to achieve directional flow of air.

[0077] Optionally, the outlet 213 is provided corresponding to the air inlet 312. This arrangement can form a circulation in the heat dissipation channel of the projector 100, and utilize the heat dissipation component 3 to accelerate the flow of air in the cavity 211 of the projection optical engine 2, thereby further improving the heat dissipation effect.

[0078] In one embodiment, the projection light engine 2 is further provided with a dustproof member 25 , and the dustproof member 25 is provided at the inlet 212 and / or the outlet 213 .

[0079] In this embodiment, if Figures 3 to 5 As shown, dustproof members 25 are provided at the inlet 212 and / or outlet 213 to prevent dust from entering the interior of the projection light engine 2 and thereby affecting the operating state or life of the projection light engine 2. Optionally, the dustproof member 25 is a dustproof and breathable membrane. It will be appreciated that the dustproof and breathable membrane can achieve a dustproof effect without affecting airflow.

[0080] In one embodiment, if Figure 3 As shown, the projection light engine 2 is further provided with a limiting groove 215 around the inlet 212 and / or outlet 213, and the dustproof member 25 is accommodated and limited in the limiting groove 215. It can be understood that by providing the limiting groove 215, the limiting groove 215 is utilized to achieve the limited installation of the dustproof member 25, thereby preventing the dustproof member 25 from shifting due to the airflow, and improving the dust prevention effect.

[0081] In one embodiment, the projection light engine 2 includes a housing 21, a light source 22, a lens assembly and a lens assembly 23. The housing 21 is provided with a cavity 211 and an inlet 212 and an outlet 213 connected to the cavity 211. The light source 22 is disposed in the cavity 211 for emitting light. The lens assembly is disposed in the cavity 211 and is spaced apart from the light source 22. One end of the lens assembly 23 is passed through the housing 21 and extends into the cavity 211. The light emitted by the light source 22 is refracted through the lens assembly to the lens assembly 23 for emission.

[0082] In this embodiment, if Figures 2 to 5As shown, the housing 21 of the optical projection engine 2 is used to install, fix, support, and protect components such as the light source 22, the lens assembly, and the lens assembly 23. In other words, the housing 21 provides a mounting base for the light source 22, the lens assembly, and the lens assembly 23. It can be understood that by integrating the light source 22, the lens assembly, and the lens assembly 23 of the optical projection engine 2 into the housing 21, an integrated design is achieved, which facilitates processing and assembly and disassembly, while also achieving the purpose of reducing the size.

[0083] As will be understood, the light source 22 is used to emit projected light. Optionally, the light source 22 is an LED lamp. In this embodiment, the lens assembly includes at least one optical lens. Of course, the lens assembly may also include multiple optical lenses, and the optical lenses may be arranged and fixed according to the optical path, which is not limited here. In order to improve the installation stability of the lens assembly, the inner wall of the cavity 211 of the housing 21 may be provided with a fixing structure, such as a fixing boss, a limiting groove, etc., which is not limited here.

[0084] In this embodiment, the projector 100 also includes a circuit board, which is arranged on the outer wall of the shell 21 of the projection optical machine 2 and is electrically connected to the light source 22 and the lens assembly 23, so that the light source 22 and the lens assembly 23 are electrically connected or signal connected to the control circuit or circuit board of the projector 100, which is not limited here.

[0085] Optionally, the optical projection engine 2 further includes a digital micromirror device 24, which is disposed within the cavity 211 and spaced apart from the light source 22 and the lens assembly. In this embodiment, one end of the lens assembly 23 of the optical projection engine 2 extends through the housing 21, enabling the lens assembly 23 to receive light emitted by the light source 22 and refracted by the lens assembly. The other end of the lens assembly 23 corresponds to the light outlet on the housing 1.

[0086] It can be understood that the number and position of the outlets 213 on the shell 21 can be determined according to the position and number of the lens components in the actual projection light machine 2, so as to facilitate the airflow blown out of the heat dissipation component 3 to be introduced into the interior of the projection light machine 2 through the air guide channel 41 of the air guide member 4, so as to achieve the purpose of lowering the temperature of the plastic body and the plastic lens. At the same time, the airflow in the cavity 211 of the projection light machine 2 passes over the optical lens according to different paths, which will also have a certain cleaning effect on the optical lens, reduce the dirt on the optical lens, and improve the brightness of the light machine.

[0087] In one embodiment, the heat dissipation assembly 3 includes a fan 31 and a radiator 32, wherein the fan 31 has an air intake 312 and an air outlet 311, and the radiator 32 includes an abutting end 321, a heat dissipation pipe 322 and heat dissipation fins 323. The abutting end 321 is arranged in contact with the outer wall of the projector light machine 2, one end of the heat dissipation pipe 322 is connected to the abutting end 321, and the other end of the heat dissipation pipe 322 is connected to the heat dissipation fins 323. The heat dissipation fins 323 are arranged corresponding to the air outlet 311 and are arranged adjacent to the air guide 4.

[0088] In this embodiment, if Figure 2 、 Figures 6 to 8 As shown, the fan 31 of the heat dissipation assembly 3 can be a centrifugal fan. The abutting end 321 of the heat sink 32 is attached to the outer wall of the housing 21 of the projection light engine 2 to further dissipate heat from the light source 22 within the projection light engine 2. As will be appreciated, the light source 22 is embedded in the housing 21, and the abutting end 321 is located on the outer wall of the housing 21 and abuts against the light source 22. The abutting end 321 conducts heat through the heat dissipation pipe 322 to the heat dissipation fins 323, causing the heat dissipation fins 323 to be cooled by the fan 31.

[0089] It is understood that the heat dissipation fins 323 include a plurality of heat dissipation fins 323, which are spaced apart and arranged in parallel on the end of the heat dissipation pipe 322 away from the abutment end 321 and corresponding to the air outlet 311. In this embodiment, the heat dissipation fins 323 are provided with through holes for the heat dissipation pipe 322 to pass through, so that the plurality of heat dissipation fins 323 are connected in series on the heat dissipation pipe 322, thereby allowing the plurality of heat dissipation fins 323 to dissipate heat transferred from the heat dissipation pipe 322 through the fan 31 for cooling.

[0090] Optionally, the heat dissipation fins 323 are in a zigzag, wavy, or sawtooth shape. It is understandable that such a configuration can effectively increase the heat exchange area of ​​the heat dissipation fins 323 and effectively reduce the temperature of the LED lamp.

[0091] In one embodiment, if Figure 1 As shown, the housing 1 of the projector 100 is further provided with a vent 11 communicating with the mounting cavity. The projection optical engine 2, heat sink assembly 3, and air guide 4 are all disposed within the mounting cavity, and the air intake 312 is correspondingly connected to the vent 11. As will be appreciated, this arrangement allows the air intake 312 of the fan 31 to rapidly draw in cool external air through the vent 11 of the housing 1; at the same time, the vent 11 is used to discharge the hot air within the mounting cavity of the housing 1 out of the housing 1.

[0092] In this embodiment, the housing 1 is provided with a plurality of vent holes 11. The vent holes 11 can be configured as small holes. The diameter of the vent holes 11 can be set according to actual conditions and is not limited here. It is understood that the housing 1 can be provided with multiple vent holes 11 on different sides. The multiple vent holes 11 can be arranged in an array or in a circular, oval, square, or other structure, which is not limited here.

[0093] It can be understood that the air intake 312 of the heat dissipation assembly 3 is correspondingly connected to some of the vents 11, and some of the vents 11 are connected to the installation cavity of the shell 1, so as to guide the airflow in the shell 1 out of the shell 1 to achieve air circulation.

[0094] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A projector, characterized in that: The projector comprises: A projection light engine, the projection light engine being provided with a cavity and an inlet and an outlet communicating with the cavity; a heat dissipation component, wherein the heat dissipation component is provided with an air outlet; and an air guide member, wherein the air guide member is provided with an air guide channel, one end of the air guide member is connected to the air outlet, and the other end of the air guide member is connected to the inlet, so that the air outlet, the air guide channel, the inlet, the cavity and the outlet form a heat dissipation channel; The heat dissipation component includes: a fan having an air intake and the air outlet; and The radiator includes an abutting end, a heat dissipation pipe and heat dissipation fins. The abutting end is attached to the outer wall of the projector light machine, one end of the heat dissipation pipe is connected to the abutting end, and the other end of the heat dissipation pipe is connected to the heat dissipation fins. The heat dissipation fins are arranged corresponding to the air outlet and are arranged adjacent to the air guide.

2. The projector according to claim 1, wherein The air guide member includes a first connecting end, a connecting tube and a second connecting end connected in sequence, the air guide channel passes through the first connecting end, the connecting tube and the second connecting end, the first connecting end is connected to the projection light engine and is arranged corresponding to the inlet, and the second connecting end is connected to the heat dissipation component and is arranged corresponding to the air outlet.

3. The projector according to claim 2, wherein: A connecting platform is provided on the periphery of the first connecting end, a boss is provided on the projection light engine surrounding the inlet, and the connecting platform is connected to the boss via a fastener; And / or, a connection stop edge is provided on the periphery of the second connection end, the heat dissipation assembly is provided with a connection portion adjacent to the air outlet, and the connection stop edge is connected to the connection portion via a fixing member; And / or, the cross-sectional area of ​​the opening of the first connection end is the same as or different from the cross-sectional area of ​​the opening of the second connection end; And / or, the opening shape of the first connection end is the same as or different from the opening shape of the second connection end.

4. The projector according to claim 1, wherein The projection light engine is provided with a plurality of the outlets so as to form a plurality of air flow channels in the cavity; And / or, the inlet and the outlet are arranged on opposite sides of the projection light engine; And / or, the heat dissipation component is further provided with an air suction port, and the outlet is arranged corresponding to the air suction port.

5. The projector according to claim 1, wherein The projection light engine is further provided with a dustproof part, and the dustproof part is provided at the inlet and / or the outlet.

6. The projector according to claim 5, wherein: The dustproof part is a dustproof breathable membrane; And / or, the projection light engine is further provided with a limiting groove around the inlet and / or the outlet, and the dustproof part is accommodated and limited in the limiting groove.

7. The projector according to claim 1, wherein The projection light machine comprises: a housing, wherein the housing is provided with the cavity and the inlet and the outlet communicating with the cavity; a light source, disposed in the cavity and configured to emit light; a lens assembly, the lens assembly being disposed in the cavity and spaced apart from the light source; and a lens assembly, one end of which is disposed through the housing and extends into the cavity; The light emitted by the light source is refracted by the lens assembly and emitted from the lens assembly.

8. The projector according to claim 7, wherein: The light source is an LED lamp; And / or, the lens assembly includes at least one optical lens; And / or, the projection optical engine further includes a digital micromirror device, which is disposed in the cavity and spaced apart from the light source and the lens assembly.

9. The projector according to any one of claims 1 to 8, characterized in that The fan is a centrifugal fan; And / or, the heat dissipation fins include a plurality of heat dissipation fins, which are spaced apart and arranged in parallel on an end of the heat dissipation pipe away from the abutting end and corresponding to the air outlet; And / or, the heat dissipation fins are in a zigzag or wavy shape; And / or, the projector also includes a shell, the shell is provided with an installation cavity and a vent connected to the installation cavity, the projection optical engine, the heat dissipation assembly and the air guide are all arranged in the installation cavity, and the air intake port is correspondingly connected to the vent.

Images