Short-focus high-definition projector ray machine capable of preventing lens from being atomized

Abstract

The invention relates to the technical field of projection equipment, and discloses a short-focus high-definition projector ray machine capable of preventing lens atomization, which comprises a machine body, a lens assembly arranged on the outer side of the machine body and a condensation assembly, and is characterized in that the lens assembly specifically comprises a rear lens cone arranged on the surface of the machine body and a front lens cone arranged on the outer side of the rear lens cone; the rotating and adjusting wheel is arranged on the outer side of the front lens cone, the lining is arranged in the rear lens cone, and the lenses are arranged in the rear lens cone, the front lens cone and the lining. According to the short-focus high-definition projector ray machine capable of preventing the lens from being atomized, by arranging the condensation assembly, a cooling ring keeps a relatively low temperature under the action of cooling liquid during use, so that vaporized lubricating oil can be condensed on the surface of the cooling ring when floating in the lens assembly, the lens can be prevented from being contaminated by the lubricating oil, atomized oil stains are prevented from being generated on the surface of the lens, and the service life of the lens is prolonged. Long-time use and clear projection of the lens assembly can be maintained, and the function of the product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of projection equipment, and in particular to a short-throw high-definition projector optical machine that prevents lens fogging. Background Art

[0002] The short-throw HD projector optical engine is the core component of the short-throw HD projector, and plays a vital role in the projection quality, brightness, color, etc. The short-throw HD projector optical engine mainly emits light through a light source, and is processed by a series of optical elements and lenses, such as refraction, reflection, scattering, etc. Finally, the light is focused through the lens and projected onto the screen to form a clear image.

[0003] The patent with the patent publication number CN216565325U discloses an anti-fogging night vision camera device for a vehicle-mounted navigation system, comprising a shell, a ring-shaped fixing frame fixedly mounted on the surface of the transparent glass, the sponge pad fits with the upper half of the transparent glass, and the output shaft of the motor is fixedly mounted with a second gear, and the second gear meshes with the first gear; through the arrangement of the ring-shaped fixing frame, the sponge pad and the motor, the motor, the second gear, the first gear and the teeth cooperate, so as to drive the ring-shaped fixing frame to rotate; through the arrangement of the sponge pad, when the transparent glass rotates, the sponge pad can wipe the water mist on the transparent glass, so as to prevent the lens from being covered by water mist when the vehicle-mounted camera is in use, thereby affecting the normal shooting of the vehicle-mounted camera; through the arrangement of the ring-shaped fixing frame, the sponge pad and the motor, the normal shooting of the vehicle-mounted camera can be prevented from being affected by the appearance of water mist on the lens of the camera when the vehicle-mounted camera is in normal use.

[0004] The prior art has the following defects:

[0005] In order to keep the focal length adjustment process smooth, it is necessary to apply lubricating oil to the connection of the lens to reduce the friction between the two. When the projection equipment is used, the temperature inside the optical machine rises, and the lubricating oil at the connection of the lens will gradually vaporize as the temperature rises, while the temperature of the lens is relatively low, and the temperature of the lens drops the fastest after shutdown. This will cause the vaporized lubricating oil to condense on the surface of the lens, resulting in atomized oil stains, which will affect the light transmission effect of the lens. Summary of the invention

[0006] In view of the problem of fogging and oil stain on the lens in the prior art, a short-throw high-definition projector optical machine is proposed to prevent the lens from fogging.

[0007] The present application provides a short-throw high-definition projector optical machine for preventing lens fogging, the purpose of which is to avoid fogging and oil stains on the lens.

[0008] The technical scheme of the present invention is: a short-throw high-definition projector optical machine for preventing lens fogging, comprising a fuselage, a lens assembly arranged outside the fuselage, and a condensing assembly, wherein the lens assembly specifically comprises a rear lens barrel arranged on the surface of the fuselage, a front lens barrel arranged outside the rear lens barrel, a rotating adjustment wheel arranged outside the front lens barrel, an inner lining arranged inside the rear lens barrel, and lenses arranged inside the rear lens barrel, the front lens barrel, and the inner lining;

[0009] The condensation assembly specifically comprises an embedded groove opened on the inner wall of the liner, a cooling ring arranged inside the embedded groove, an inner interface opened on the inner wall of the embedded groove, and a butt joint arranged outside the cooling ring;

[0010] The cooling ring adopts a hollow design and is filled with coolant. The inner interface is located directly above the embedded groove, and a cooling component is arranged above the cooling ring.

[0011] Furthermore, the cross section of the cooling ring is elliptical.

[0012] Furthermore, the condensation assembly also includes a clamping groove opened on the inner wall of the embedded groove, and a water absorption ring arranged inside the clamping groove;

[0013] The clamping grooves are located on both sides of the cooling ring, and the water absorption rings are pressed on the edges of both sides of the cooling ring.

[0014] The cooling assembly includes an external interface opened on the outside of the rear lens barrel, a cooling barrel arranged above the external interface, and a barrel tail cover arranged above the cooling barrel;

[0015] The outer interface is communicated with the inner interface, a fixed joint is arranged at the bottom of the cooling cylinder, and the fixed joint penetrates the outer interface and is inserted into the docking joint, and the cooling cylinder is located directly above the cooling ring.

[0016] Furthermore, the cooling assembly also includes a top plate and a separation sleeve arranged inside the cooling cylinder, and an interaction port opened outside the separation sleeve;

[0017] The top plate is clamped between the butt joint and the cooling cylinder, the partition sleeve and the top plate are fixedly connected, the partition sleeve is divided into two parts, the upper part is a cylindrical cylinder, and the lower part is a truncated cone cylinder. The lower opening of the partition sleeve extends to the top of the fixed joint, and the diameter of the lower opening of the partition sleeve is smaller than the inner diameter of the fixed joint. The partition sleeve divides the internal space of the cooling cylinder into two parts, the inner and outer parts. The part surrounded by the partition sleeve is the internal space, and the part between the partition sleeve and the cooling cylinder is the external space. The interactive ports are distributed in a linear array from top to bottom, and are also distributed in a circular array around the central axis of the partition sleeve.

[0018] Furthermore, a guide plate is fixedly connected to the outer side of the separation sleeve, the guide plate corresponds to the interaction port one by one, and the guide plate is located below the opening of the interaction port, and the outer edge of the guide plate is higher than the inner edge.

[0019] Furthermore, the cooling assembly also includes a cannula arranged inside the separation sleeve, a support plate arranged outside the cannula, a side flow port opened on the outside of the cannula and the support plate, an external sealing plate and an external return spring sleeved on the outside of the cannula, a limit sleeve arranged on the top of the cannula, a guide column arranged on the inner ring wall of the cooling ring, an internal return spring and an internal sealing plate arranged outside the guide column, and positioning grooves and guide grooves respectively opened on the upper and lower sides of the internal sealing plate;

[0020] The insert tube extends downward out of the separation sleeve, the support plate, the external sealing plate, and the external reset spring are all located below the separation sleeve, the external sealing plate is placed above the support plate, the external reset spring is located between the external sealing plate and the separation sleeve, the external sealing plate is located above the fixed joint, the limit sleeve is located on the inner side of the separation sleeve, the guide column is inserted into the guide groove, and the internal reset spring is located below the internal sealing plate

[0021] Furthermore, the positioning groove is hexagonal, and the six sides of the hexagon are tangent to the outer contour of the insertion tube.

[0022] Furthermore, the outer side of the cooling cylinder is fixedly connected with heat sinks distributed in a ring array.

[0023] Beneficial effects of the present invention:

[0024] 1. By setting up the condensation component, the cooling ring is kept at a relatively low temperature under the action of the coolant during use. In this way, when the vaporized lubricating oil floats in the lens assembly, it will condense on the surface of the cooling ring, which can prevent the lens from being contaminated with lubricating oil and generating atomized oil stains on its surface, which is conducive to maintaining the long-term use and clear projection of the lens assembly, and improves the product function.

[0025] 2. By setting the cooling ring to an elliptical shape, the center of the outer contour of the cooling ring protrudes outward, which can make the process of the coolant flowing to the cooling component smoother, avoiding the occurrence of dead corners in the flow, and is beneficial to improving the cooling and condensation effect. The center of the inner contour of the cooling ring protrudes inward, and the condensed oil and dirt on the surface of the cooling ring will first flow downward along the inner contour of the cooling ring in the circumferential direction, and then flow to both sides of the cooling ring and be absorbed by the water absorption ring, avoiding the escape of oil and dirt and secondary evaporation. At the same time, the water absorption ring can also start the fixing effect on the embedded groove, making its installation more stable.

[0026] 3. By setting up a cooling component, the coolant in the cooling ring absorbs heat and floats into the cooling cylinder, and the coolant with a lower temperature in the cooling cylinder sinks into the cooling ring. This cycle can quickly discharge the heat absorbed by the cooling ring, provide a stable cooling effect, and achieve continuous condensation.

[0027] 4. By setting a separation sleeve, the separation sleeve divides the internal space of the cooling cylinder into two parts, so that the hot coolant is guided into the external space when it floats up and continues to float up, and the cool coolant in the internal space is squeezed out and sinks into the cooling ring, thereby forming a stable circulation channel, making the cooling process more stable and the condensation effect of the cooling ring better. At the same time, the external space is close to the outer wall of the cooling cylinder, which can quickly transfer the heat of the hot coolant and improve the cooling efficiency.

[0028] 5. Through the cooperation of the built-in sealing plate and the external sealing plate, when installing and disassembling the separation sleeve, under the action of the insert, the two are opened or closed in turn front and back to ensure the stability of the installation process and avoid coolant leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional diagram of the optical machine of a short-throw high-definition projector for preventing lens fogging according to the present invention;

[0030] Figure 2 It is a schematic diagram of the lens assembly of the present invention;

[0031] Figure 3 This is a disassembled diagram of the lens assembly of the present invention;

[0032] Figure 4 This is a disassembly diagram of the inner liner of the present invention;

[0033] Figure 5 It is a schematic diagram of the cooling ring of the present invention;

[0034] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0035] Figure 7 It is a schematic diagram of the cooling cylinder of the present invention;

[0036] Figure 8 This is a disassembled diagram of the internal components of the cooling cylinder of the present invention;

[0037] Fig. 9 It is a schematic diagram of the separation sleeve of the present invention;

[0038] Fig.10 This is a disassembled diagram of the internal components of the separation sleeve of the present invention;

[0039] Fig.11 A top view of the lens assembly of the present invention;

[0040] Fig.12 For the present invention Fig.11 Middle AA section view;

[0041] Fig.13 For the present invention Fig.12 Enlarged view of point B in the middle;

[0042] Fig.14 For the present invention Fig.13 Enlarged view of the middle cooling cylinder;

[0043] Fig.15 For the present invention Fig.14 Select the enlarged part in the middle box.

[0044] In the figure:

[0045] 1. Body; 2. Lens assembly; 21. Rear lens barrel; 22. Front lens barrel; 23. Turning adjustment wheel; 24. Lining; 25. Lens; 3. Condensation assembly; 31. Embedded groove; 32. Cooling ring; 33. Internal interface; 34. Docking joint; 35. Slot; 36. Water absorption ring; 4. Cooling assembly; 41. External interface; 42. Cooling barrel; 43. Barrel tail cover; 44. Top plate; 45. Separation sleeve; 46. Insert tube; 47. Support plate; 48. Side flow port; 49. External sealing plate; 410. External return spring; 411. Limit sleeve; 412. Guide column; 413. Internal return spring; 414. Internal sealing plate; 415. Positioning groove; 416. Guide groove; 417. Interaction port; 418. Guide plate; 419. Heat sink. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0047] Example 1, reference Figure 1-13 , which is the first embodiment of the present invention, provides a short-focus high-definition projector optical machine for preventing lens fogging, including a body 1, a lens assembly 2 arranged on the outside of the body 1, and a condensation assembly 3. The lens assembly 2 is specifically a rear lens barrel 21 arranged on the surface of the body 1, a front lens barrel 22 arranged on the outside of the rear lens barrel 21, a rotating adjustment wheel 23 arranged on the outside of the front lens barrel 22, a lining 24 arranged inside the rear lens barrel 21, and a lens 25 arranged inside the rear lens barrel 21, the front lens barrel 22, and the lining 24.

[0048] The condensation assembly 3 specifically includes an embedded groove 31 opened on the inner wall of the liner 24 , a cooling ring 32 arranged inside the embedded groove 31 , an inner interface 33 opened on the inner wall of the embedded groove 31 , and a docking joint 34 arranged outside the cooling ring 32 .

[0049] Specifically, multiple groups of optical elements are arranged inside the body 1 to convert electrical signals into images. The rear barrel 21 is fixed to the lens interface of the body 1 by screws, the front barrel 22 is sleeved on the outside of the rear barrel 21, and the two are threadedly connected, the rotating adjustment wheel 23 is fixed to the outside of the front barrel 22, the lining 24 is inserted into the rear barrel 21 and fixed by screws, the lining 24 is divided into two parts, front and rear, the condensation component 3 is arranged in the front lining 24, and the front lining 24 is formed by splicing two semi-cylinders; the embedded groove 31 is annular, and the cooling ring 32 is embedded in the embedded groove 31. The cooling ring 32 adopts a hollow design, the material is copper, and the interior is filled with coolant, which can be water. The inner interface 33 is located directly above the embedded groove 31, and a cooling component 4 is arranged above the cooling ring 32.

[0050] By setting up the condensing component 3, the cooling ring 32 is kept at a relatively low temperature under the action of the coolant during use, so that when the vaporized lubricating oil floats in the lens component 2, it will condense on the surface of the cooling ring 32, which can prevent the lens 25 from being contaminated by the lubricating oil and generating atomized oil stains on its surface, which is beneficial to maintaining the long-term use and clear projection of the lens component 2, and improves the product function.

[0051] The condensation assembly 3 further includes a groove 35 formed on the inner wall of the embedded groove 31 and a water absorption ring 36 disposed inside the groove 35 .

[0052] Specifically, the cross section of the cooling ring 32 is , the slots 35 are located on both sides of the cooling ring 32 , the water absorption rings 36 are pressed on the edges on both sides of the cooling ring 32 , the water absorption rings 36 are made of porous sponge and are elastic, and are filled in the slots 35 .

[0053] By setting the cooling ring 32 to be elliptical, so that the center of the outer contour of the cooling ring 32 protrudes outward, the process of the coolant being heated and flowing to the cooling component 4 can be smoother, avoiding the occurrence of dead corners in the flow, which is beneficial to improving the cooling and condensation effect. The center of the inner contour of the cooling ring 32 protrudes inward, and the oil condensed on the surface of the cooling ring 32 will first flow downward along the inner contour of the cooling ring 32 in the circumferential direction, and then flow to both sides of the cooling ring 32 and be absorbed by the water absorption ring 36, avoiding the escape of oil and secondary evaporation. At the same time, the water absorption ring 36 can also activate the fixing effect on the embedded groove 31, making its installation more stable.

[0054] Example 2, reference Figure 6-15 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the cooling assembly 4 includes an external interface 41 opened on the outside of the rear lens barrel 21, a cooling barrel 42 arranged above the external interface 41, and a barrel tail cover 43 arranged above the cooling barrel 42.

[0055] Specifically, the external interface 41 is connected to the internal interface 33, a fixed joint is arranged at the bottom of the cooling cylinder 42, and the fixed joint passes through the external interface 41 and is inserted into the docking joint 34. The cooling cylinder 42 is located directly above the cooling ring 32, and the cooling cylinder 42 is filled with coolant, which is the same as the coolant in the cooling ring 32. The outer side of the cooling cylinder 42 is fixedly connected with heat sinks 419 distributed in a ring array to accelerate the cooling of the coolant in the cooling cylinder 42.

[0056] By setting up the cooling component 4, the coolant in the cooling ring 32 absorbs heat and floats into the cooling tube 42, and the coolant with a lower temperature in the cooling tube 42 sinks into the cooling ring 32. This cycle can quickly discharge the heat absorbed by the cooling ring 32, provide a stable cooling effect, and achieve continuous condensation.

[0057] The cooling assembly 4 further includes a top plate 44 and a separation sleeve 45 disposed inside the cooling cylinder 42 , and an interaction port 417 opened outside the separation sleeve 45 .

[0058] Specifically, the top plate 44 is clamped between the docking joint 34 and the cooling cylinder 42, the separator sleeve 45 and the top plate 44 are fixedly connected, the separator sleeve 45 is divided into two parts, the upper part is a cylindrical cylinder, and the lower part is a truncated cone cylinder. The lower opening of the separator sleeve 45 extends to the top of the fixed joint, and the diameter of the lower opening of the separator sleeve 45 is smaller than the inner diameter of the fixed joint. The separator sleeve 45 divides the internal space of the cooling cylinder 42 into two parts, the inner and outer parts. The part surrounded by the separator sleeve 45 is the internal space, and the part between the separator sleeve 45 and the cooling cylinder 42 is the external space. The interaction ports 417 are distributed in a linear array from top to bottom, and are also distributed in a circular array around the central axis of the separator sleeve 45.

[0059] By setting the separation sleeve 45, the separation sleeve 45 divides the internal space of the cooling cylinder 42 into two parts, so that the hot coolant is guided into the external space when it floats up and continues to float up, and the cool coolant in the internal space is squeezed out and sinks into the cooling ring 32, thereby forming a stable circulation channel, making the cooling process more stable and the condensation effect of the cooling ring 32 better. At the same time, the external space is close to the outer wall of the cooling cylinder 42, which can quickly transfer the heat of the hot coolant and improve the cooling efficiency.

[0060] Specifically, a guide plate 418 is fixedly connected to the outside of the separation sleeve 45. The guide plate 418 corresponds to the interaction port 417 one by one, and the guide plate 418 is located below the opening of the interaction port 417. The outer edge of the guide plate 418 is higher than the inner edge. In this way, after the coolant completes the cooling requirements in the external space, it sinks against other floating coolant and is guided into the internal space by the guide plate 418.

[0061] The cooling assembly 4 also includes a cannula 46 arranged inside the separation sleeve 45, a support plate 47 arranged outside the cannula 46, a side flow port 48 opened on the outside of the cannula 46 and the support plate 47, an external sealing plate 49 and an external return spring 410 sleeved on the outside of the cannula 46, a limiting sleeve 411 arranged on the top of the cannula 46, a guide column 412 arranged on the inner ring wall of the cooling ring 32, an internal return spring 413 and an internal sealing plate 414 arranged on the outside of the guide column 412, and a positioning groove 415 and a guide groove 416 respectively opened on the upper and lower sides of the internal sealing plate 414.

[0062] Specifically, the insert 46 is slidably inserted into the opening below the separation sleeve 45, and the insert 46 extends downward out of the separation sleeve 45. The support plate 47, the external sealing plate 49, and the external reset spring 410 are all located below the separation sleeve 45. The support plate 47 is welded to the insert 46, the external sealing plate 49 is placed above the support plate 47, the external reset spring 410 is located between the external sealing plate 49 and the separation sleeve 45, the external sealing plate 49 is located above the fixed joint, the external sealing plate 49 and the external reset spring 410 are both slidably sleeved, the limit sleeve 411 is threadedly connected to the insert 46, the limit sleeve 411 is located on the inner side of the separation sleeve 45, and the guide column 412 is a cooling ring. The outer side of 32 is inserted into the interior of the cooling ring 32, the two are threadedly connected, and a sealing gasket is arranged at the connection, the guide column 412 is inserted into the guide groove 416, the built-in return spring 413 is located below the built-in sealing plate 414, the outer side of the built-in sealing plate 414 is wrapped with a rubber cushion, which will be deformed when subjected to strong compression, the top surface of the built-in sealing plate 414 is an arc surface, the positioning groove 415 is hexagonal, and the six sides of the hexagon are tangent to the outer contour of the insert tube 46, which activates the function of stabilizing the separation sleeve 45 and the insert tube 46, and also facilitates the installation of the built-in sealing plate 414, and the force required to compress the external return spring 410 is greater than the force required to compress the built-in return spring 413.

[0063] Through the cooperation of the internal sealing plate 414 and the external sealing plate 49, when installing and removing the separation sleeve 45, under the action of the insert 46, the two are opened or closed in turn front and back, thereby ensuring the stability of the installation process and avoiding leakage of the coolant.

[0064] Based on Examples 1-2, the working principle of the optical machine of a short-throw high-definition projector to prevent lens fogging of the present invention is as follows:

[0065] During installation, first put the external sealing plate 49 and the external return spring 410 on the outside of the insert tube 46 in sequence, then insert the insert tube 46 from the bottom of the separation sleeve 45, use a tool to fix the limit sleeve 411 to one end of the insert tube 46 in the separation sleeve 45, and then insert the separation sleeve 45 into the cooling tube 42, the insert tube 46 extends out from the bottom of the cooling tube 42, the top plate 44 is clamped in the opening above the cooling tube 42, and finally the tube tail cover 43 is fixed above the cooling tube 42; insert the guide column 412 from the inner ring of the cooling ring 32, and then use a tool to insert the built-in return spring 413 and the built-in sealing plate 414 from the inner interface 33 in sequence, so that they are set on the outside of the guide column 412.

[0066] Disassemble the front liner 24 in half, place the cooling ring 32 into the embedded groove 31, insert the butt joint 34 into the inner interface 33, and then assemble the front liner 24 completely. Then use a tool to insert the water absorption ring 36 into the card groove 35, so that the water absorption ring 36 is fixed on both sides of the cooling ring 32, and finally assemble the liner 24 as a whole; insert the liner 24 into the rear lens barrel 21, keep the inner interface 33 corresponding to the outer interface 41, and then put the front lens barrel 22 on the outside of the rear lens barrel 21, and finally insert the cooling barrel 42 from the top of the outer interface 41; during the insertion of the outer interface 41, the intubation tube 46 First, insert the butt joint 34 into the positioning groove 415, and then insert the tube 46 to press down the built-in sealing plate 414. The built-in sealing plate 414 moves downward on the outside of the guide column 412 to compress the built-in return spring 413, and the connection port between the cooling ring 32 and the butt joint 34 is opened. After the built-in sealing plate 414 cannot move, the guide groove 416 is opened to push the external sealing plate 49 through the support plate 47. The external sealing plate 49 compresses the external return spring 410 and approaches the separation sleeve 45. The external sealing plate 49 leaves the opening below the cooling tube 42 to open it, so that the cooling tube 42 and the cooling ring 32 are connected.

[0067] During use, light passes through the lens assembly 2, causing its temperature to rise, and the vaporized lubricating oil floats in the lens assembly 2. When the vaporized lubricating oil passes through the cooling ring 32, due to the low temperature of the cooling ring 32, the vaporized lubricating oil quickly releases heat and condenses, and adheres to the surface of the cooling ring 32. As the amount of attached lubricating oil increases, the lubricating oil gathers downward and is absorbed by the water absorption ring 36.

[0068] The coolant in the cooling ring 32 absorbs heat, and due to its high temperature and low density, it floats upward. The hot coolant first floats to the top of the cooling ring 32, and then enters the cooling tube 42. Guided by the inclined surface below the separation sleeve 45, it enters the external space outside the separation sleeve 45. At the same time, affected by the guide plate 418, the hot coolant always stays close to the outer wall of the cooling tube 42 during the floating process, so that the heat therein can be quickly dissipated through the cooling tube 42 and the heat sink 419. The cool coolant inside the cooling tube 42 is squeezed out by the hot coolant and sinks on the inside of the separation sleeve 45. The cool coolant enters the insert 46, then flows out from the side flow port 48, and finally enters the cooling ring 32 to maintain the low temperature state of the cooling ring 32.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A short-throw high-definition projector optical machine for preventing lens fogging, comprising a body (1), a lens assembly (2) arranged outside the body (1), and characterized in that: The lens assembly (2) further comprises a condensing assembly (3), wherein the lens assembly (2) specifically comprises a rear lens barrel (21) arranged on the surface of the body (1), a front lens barrel (22) arranged outside the rear lens barrel (21), a rotating adjustment wheel (23) arranged outside the front lens barrel (22), an inner lining (24) arranged inside the rear lens barrel (21), and a lens (25) arranged inside the rear lens barrel (21), the front lens barrel (22), and the inner lining (24); The condensation assembly (3) specifically comprises an embedded groove (31) provided on the inner wall of the liner (24), a cooling ring (32) arranged inside the embedded groove (31), an inner interface (33) provided on the inner wall of the embedded groove (31), and a butt joint (34) arranged on the outer side of the cooling ring (32); The cooling ring (32) is hollow in design and filled with cooling liquid. The inner interface (33) is located directly above the embedded groove (31). A cooling component (4) is arranged above the cooling ring (32).

2. The short-throw high-definition projector optical machine for preventing lens fogging according to claim 1, characterized in that: The cross section of the cooling ring (32) is elliptical.

3. The short-throw high-definition projector optical machine for preventing lens fogging according to claim 2, characterized in that: The condensation assembly (3) further comprises a clamping groove (35) formed on the inner wall of the embedded groove (31), and a water absorption ring (36) arranged inside the clamping groove (35); The clamping grooves (35) are located on both sides of the cooling ring (32), and the water absorption rings (36) are pressed on the edges of both sides of the cooling ring (32).

4. The short-throw high-definition projector optical machine for preventing lens fogging according to claim 3, characterized in that: The cooling assembly (4) comprises an external interface (41) opened on the outside of the rear lens barrel (21), a cooling barrel (42) arranged above the external interface (41), and a barrel tail cover (43) arranged above the cooling barrel (42); The outer interface (41) is connected to the inner interface (33), a fixed joint is arranged at the bottom of the cooling tube (42), and the fixed joint passes through the outer interface (41) and is inserted into the docking joint (34), and the cooling tube (42) is located directly above the cooling ring (32).

5. The short-throw high-definition projector optical machine for preventing lens fogging according to claim 4, characterized in that: The cooling assembly (4) further comprises a top plate (44) and a separation sleeve (45) arranged inside the cooling cylinder (42), and an interaction port (417) opened outside the separation sleeve (45); The top plate (44) is clamped between the docking joint (34) and the cooling cylinder (42), the partition sleeve (45) and the top plate (44) are fixedly connected, the partition sleeve (45) is divided into two parts, the upper part is a cylindrical cylinder, and the lower part is a truncated cone cylinder. The lower opening of the partition sleeve (45) extends to the top of the fixed joint, and the diameter of the lower opening of the partition sleeve (45) is smaller than the inner diameter of the fixed joint. The partition sleeve (45) divides the internal space of the cooling cylinder (42) into two parts, the inner and outer parts. The part surrounded by the partition sleeve (45) is the internal space, and the part between the partition sleeve (45) and the cooling cylinder (42) is the external space. The interaction ports (417) are distributed in a linear array from top to bottom, and are also distributed in a circular array around the central axis of the partition sleeve (45).

6. The short-throw high-definition projector optical machine for preventing lens fogging according to claim 5, characterized in that: A guide plate (418) is fixedly connected to the outer side of the separation sleeve (45), the guide plate (418) corresponds to the interaction opening (417) one by one, and the guide plate (418) is located below the opening of the interaction opening (417), and the outer edge of the guide plate (418) is higher than the inner edge.

7. The short-throw high-definition projector optical machine for preventing lens fogging according to claim 6, characterized in that: The cooling assembly (4) also includes a cannula (46) arranged inside the separation sleeve (45), a support plate (47) arranged outside the cannula (46), a side flow port (48) opened on the outside of the cannula (46) and the support plate (47), an external sealing plate (49) sleeved on the outside of the cannula (46), an external return spring (410), a limit sleeve (411) arranged on the top of the cannula (46), a guide column (412) arranged on the inner ring wall of the cooling ring (32), an internal return spring (413) and an internal sealing plate (414) arranged on the outside of the guide column (412), and a positioning groove (415) and a guide groove (416) respectively opened on the upper and lower sides of the internal sealing plate (414); The insert tube (46) extends downward out of the separation sleeve (45); the support plate (47), the external sealing plate (49), and the external reset spring (410) are all located below the separation sleeve (45); the external sealing plate (49) is placed above the support plate (47); the external reset spring (410) is located between the external sealing plate (49) and the separation sleeve (45); the external sealing plate (49) is located above the fixed joint; the limit sleeve (411) is located on the inner side of the separation sleeve (45); the guide column (412) is inserted into the guide groove (416); and the internal reset spring (413) is located below the internal sealing plate (414).

8. The short-throw high-definition projector optical machine for preventing lens fogging according to claim 7, characterized in that: The positioning groove (415) is hexagonal, and the six sides of the hexagon are tangent to the outer contour of the insertion tube (46).

9. The short-throw high-definition projector optical machine for preventing lens fogging according to claim 8, characterized in that: The outer side of the cooling cylinder (42) is fixedly connected with heat sinks (419) distributed in a ring array.

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