Projection equipment for education and teaching

Abstract

The invention relates to the technical field of projection equipment, and particularly discloses projection equipment for education and teaching, which comprises a projector assembly and further comprises a dust collection assembly, a first cleaning assembly and a second cleaning assembly, the dust collection assembly and the first cleaning assembly are both mounted at the top of the projector assembly, and the projector assembly comprises a projector body. A projection lens is arranged on the front side of the projector body, the dust collection assembly communicates with the first cleaning assembly and the second cleaning assembly when powered on to form negative pressure to adsorb impurities, the first cleaning assembly comprises a movable cleaning structure used for conducting simulation cleaning operation on the surface of the projection lens, and when the first cleaning assembly and the second cleaning assembly are connected, the dust collection assembly is connected with the dust collection assembly. Formal cleaning operation is carried out on the projection lens; all the components cooperatively work through precise mechanical linkage and an electromagnetic control system, the cleaning strength and mode can be intelligently and automatically adjusted according to the pollution degree of the projection lens, and therefore the cleaning efficiency and effect are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of projection devices, and particularly to a projection device for education and teaching. Background Art

[0002] With the continuous development of educational technology, projection devices have become an essential and important tool in modern education and teaching; projection devices for education and teaching generally include a projector host, a projection screen, an audio system (such as speakers), connection cables, and corresponding control software or remote controls. These devices together constitute a complete multimedia teaching system, aiming to provide vivid and intuitive teaching content display for the classroom.

[0003] The projector host is the core component of the system, responsible for converting digital signals into optical signals and projecting them onto the screen. It supports multiple input sources, such as computers, DVD players, mobile devices, etc., enabling teachers to flexibly select teaching content. The projection screen is responsible for receiving and reflecting the light emitted by the projector to form a clear image for students to watch; the audio system is used to enhance the teaching effect, creating a more immersive learning environment by playing explanatory audio or background music.

[0004] After the projection device is used, if it is not promptly stored and properly protected, it may face the problem of dust accumulation. The accumulation of dust will affect the projection effect and reduce the image quality; if the device is in a humid environment, it will cause water vapor to liquefy and condense on the surface of the transparent plate, thereby causing impurities to adhere to the transparent plate, resulting in the video image projected onto the curtain becoming blurred, reducing the projection quality, and affecting the teacher's teaching in class. For this reason, we propose a projection device for education and teaching. Summary of the Invention

[0005] The purpose of the present invention is to provide a projection device for education and teaching to solve the problems raised in the above background art. After the projection device is used, if it is not promptly stored and properly protected, it may face the problem of dust accumulation. The accumulation of dust will affect the projection effect and reduce the image quality; if the device is in a humid environment, it will cause water vapor to liquefy and condense on the surface of the transparent plate, thereby causing impurities to adhere to the transparent plate, resulting in the video image projected onto the curtain becoming blurred, reducing the projection quality, and affecting the teacher's teaching in class.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A projection device for education and teaching, including a projector component, and further including:

[0007] A dust suction assembly, a first cleaning assembly and a second cleaning assembly. The dust suction assembly and the first cleaning assembly are both installed on the top of the projector assembly. The projector assembly includes a projector body, and a projection lens is provided on the front side of the projector body. When the dust suction assembly is powered on, it is respectively connected to the first cleaning assembly and the second cleaning assembly to form a negative pressure to adsorb impurities. The first cleaning assembly is used to perform a simulated cleaning operation on the surface of the projection lens. When the first cleaning assembly and the second cleaning assembly are connected, a formal cleaning operation is performed on the projection lens.

[0008] Among them, a hanger is provided at the center of the top of the projector body, and a counterweight is installed at one end of the top of the projector body.

[0009] Among them, the dust suction assembly respectively includes a fan and a collection box installed on the top of the projector assembly. The air inlet end of the fan is connected with an air inlet pipe, the air outlet end of the fan is connected with an air outlet pipe, one end of the air outlet pipe is connected with the collection box, a filter plate is arranged inside the collection box, an air outlet hole is opened on one side of the collection box, and a box cover is connected to the top of the collection box.

[0010] Among them, the first cleaning assembly includes a base installed at one end of the top of the projector assembly. A fixing seat is installed on the top of the base, a fixing frame is installed on the top of the fixing seat, a shunt telescopic hose is connected inside the fixing frame, and a first control valve and a second control valve are respectively arranged on the outer periphery of the shunt telescopic hose.

[0011] Among them, a motor is installed on one side inside the fixing seat. The power driving end of the motor is connected with a lead screw, a moving seat is connected to the outside of the lead screw, a slider is installed on the top of the moving seat, a chute is opened at the top end inside the fixing seat, and the slider is slidably connected inside the chute. A bottom plate is installed at the bottom of the moving seat, and a connecting frame is installed on one side of the outside of the bottom plate.

[0012] Among them, a first air suction hood, a first baffle and a first cleaning frame are respectively installed at the bottom of the connecting frame. A number of groups of equally spaced first ventilation holes are opened on one side of the first air suction hood. A first dust collection box is connected to the bottom of the first air suction hood. First electromagnets are installed at the bottom ends of both the first air suction hood and the first cleaning frame. A first sponge wipe is arranged inside the first cleaning frame. Two grooves are opened inside the base, and a laser sensor and a photoelectric sensor are respectively installed inside the two grooves.

[0013] Among them, two symmetrically arranged support plates are installed inside the base. A metal rod and a wiring column are jointly arranged inside the two support plates. A resistance wire is arranged on the outside of the wiring column, a sliding piece is arranged on the outside of the metal rod, an adjusting seat is installed at the bottom end of the sliding piece, an iron block is arranged inside the adjusting seat, a mounting seat is installed inside the base and outside the adjusting seat, the adjusting seat is slidably connected inside the mounting seat, a second electromagnet is installed on one side inside the mounting seat, a notch is opened inside the fixing seat, the bottom plate is located inside the notch, and a transparent plate and a lens are respectively arranged inside the two grooves.

[0014] Among them, the second cleaning component includes a base installed on the front side of the projector component. A third electromagnet is embedded inside the base. A sliding seat is slidably connected inside the base and on top of the third electromagnet. A fourth electromagnet is embedded at the bottom of the sliding seat.

[0015] Among them, a second air suction hood and a second cleaning rack are respectively installed on the top of the sliding seat. A second baffle is arranged between the second air suction hood and the second cleaning rack. A number of groups of second ventilation holes are opened on one side of the second air suction hood. The bottom of the second air suction hood is connected to a second dust collection box. A second sponge cleaner is arranged inside the second cleaning rack.

[0016] Among them, telescopic rods are installed at the tops of the second air suction hood and the second cleaning rack. Fifth electromagnets are installed at the telescopic ends of the two telescopic rods.

[0017] The present invention has at least the following beneficial effects: Through the integration of the dust suction component, the first cleaning component and the second cleaning component, the projection device realizes the intelligent cleaning function of the projection lens. The components cooperate with each other through precise mechanical linkage and electromagnetic control system, and can intelligently adjust the cleaning strength and mode automatically according to the pollution degree of the projection lens, thus significantly improving the cleaning efficiency and effect; The photoelectric sensor is cleverly designed to simulate the detection of the pollution degree of the lens and flexibly adjust the cleaning strategy according to the real-time situation. After the cleaning operation is completed, the first baffle and the second baffle will automatically protect the lens. These designs together ensure the safe use of the projection lens and effectively extend its service life; In addition, the designs of the first cleaning component and the second cleaning component are extremely flexible, so that the cleaning process can be carried out independently or cooperatively according to actual needs; While the cleaning operation is in progress, the device can also dissipate the heat generated by the projection lens to ensure the continuous and stable operation of the projection device; More importantly, through advanced circuit designs such as sliding rheostats, the device can dynamically adjust the power of the fan according to the actual cleaning needs, thus achieving the energy-saving effect while ensuring the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a semi-exploded view of the structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the projector component of the present invention;

[0021] Figure 4 It is a schematic diagram of the dust suction component of the present invention;

[0022] Figure 5 It is a schematic diagram of the dust suction component of the present invention with the lid removed;

[0023] Figure 6 Schematic diagram of the first cleaning component of the present invention;

[0024] Figure 7 Internal view of the first cleaning component of the present invention;

[0025] Figure 8 For the present invention Figure 7 Enlarged view of A in;

[0026] Figure 9 Semi-exploded view of the first cleaning component of the present invention;

[0027] Figure 10 Schematic diagram of the second cleaning component of the present invention;

[0028] Figure 11 Internal view of the second cleaning component of the present invention

[0029] Figure 12 For the present invention Figure 11 Enlarged view of B in.

[0030] In the figure: 1, projector component; 2, dust suction component; 3, first cleaning component; 4, second cleaning component; 11, projector body; 12, hanging bracket; 13, counterweight; 14, projection lens; 21, fan; 22, collection box; 23, intake pipe; 24, exhaust pipe; 25, filter plate; 26, air outlet hole; 27, box cover; 31, base; 32, fixing seat; 33, fixing frame; 34, shunt telescopic hose; 35, motor; 36, lead screw; 37, moving seat; 38, slider; 39, chute; 310, bottom plate; 311, connecting frame; 312, first suction hood; 313, first baffle; 314, first cleaning frame; 315, first ventilation hole; 316, first dust collection box; 317, first electromagnet; 318, first sponge cleaner; 319, groove; 320, laser sensor; 321, photoelectric sensor; 322, support plate; 323, metal rod; 324, terminal; 325, resistance wire; 326, slide; 327, adjusting seat; 328, iron block; 329, mounting seat; 330, second electromagnet; 331, notch; 332, transparent plate; 333, lens; 334, first control valve; 335, second control valve; 41, base; 42, third electromagnet; 43, sliding seat; 44, fourth electromagnet; 45, second suction hood; 46, second cleaning frame; 47, second ventilation hole; 48, second dust collection box; 49, second sponge cleaner; 410, telescopic rod; 411, fifth electromagnet; 412, second baffle. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1

[0033] Please refer to Figures 1 to 12 , the present invention provides a technical solution: a projection device for education and teaching, including a projector assembly 1, and further including:

[0034] A dust suction assembly 2, a first cleaning assembly 3 and a second cleaning assembly 4. The dust suction assembly 2 and the first cleaning assembly 3 are both installed on the top of the projector assembly 1. The projector assembly 1 includes a projector body 11. A projection lens 14 is provided on the front side of the projector body 11. When the dust suction assembly 2 is powered on, it is respectively connected to the first cleaning assembly 3 and the second cleaning assembly 4 to form a negative pressure to adsorb dust. The first cleaning assembly 3 is used to perform a simulated cleaning operation on the surface of the projection lens 14. When the first cleaning assembly 3 and the second cleaning assembly 4 are connected, a formal cleaning operation is performed on the projection lens 14;

[0035] This projection device is composed of four core components: a projector assembly 1, a dust suction assembly 2, a first cleaning assembly 3 and a second cleaning assembly 4. Each component works together through mechanical linkage and electromagnetic control to realize the intelligent cleaning function of the projection lens 14;

[0036] A suspension bracket 12 is provided at the center of the top of the projector body 11, and a counterweight 13 is installed at one end of the top of the projector body 11; the suspension bracket 12 is used for hanging and fixing and is connected to the wall body, and the provided counterweight 13 is used to balance the center of gravity;

[0037] The dust suction assembly 2 respectively includes a fan 21 and a collection box 22 installed on the top of the projector assembly 1. The air inlet end of the fan 21 is connected to an air inlet pipe 23, the air outlet end of the fan 21 is connected to an air outlet pipe 24, one end of the air outlet pipe 24 is connected to the collection box 22, a filter plate 25 is provided inside the collection box 22, an air outlet hole 26 is opened on one side of the collection box 22, and a box cover 27 is connected to the top of the collection box 22;

[0038] The fan 21 sucks air through the air inlet pipe 23, the air outlet pipe 24 guides the dust-containing air flow into the collection box 22, the filter plate 25 in the collection box 22 separates the dust, and the clean air is discharged through the air outlet hole 26. The box cover 27 can be detached to clean the accumulated dust;

[0039] The first cleaning component 3 includes a base 31 installed at one end of the top of the projector component 1. A fixing seat 32 is installed on the top of the base 31. A fixing frame 33 is installed on the top of the fixing seat 32. A shunt telescopic hose 34 is connected inside the fixing frame 33. A first control valve 334 and a second control valve 335 are respectively arranged on the outer periphery of the shunt telescopic hose 34. A motor 35 is installed on one side inside the fixing seat 32. The power driving end of the motor 35 is connected to a lead screw 36. A moving seat 37 is connected to the outside of the lead screw 36. A slider 38 is installed on the top of the moving seat 37. A chute 39 is opened at the top end inside the fixing seat 32. The slider 38 is slidably connected inside the chute 39. A bottom plate 310 is installed at the bottom of the moving seat 37. A connecting frame 311 is installed on the outer side of the bottom plate 310. A first suction hood 312, a first baffle 313 and a first cleaning frame 314 are respectively installed at the bottom of the connecting frame 311. A number of groups of equally spaced first ventilation holes 315 are opened on one side of the first suction hood 312. The bottom of the first suction hood 312 is connected to a first dust collection box 316. First electromagnets 317 are installed at the bottom ends of both the first suction hood 312 and the first cleaning frame 314. A first sponge cleaner 318 is arranged inside the first cleaning frame 314. Two grooves 319 are opened inside the base 31. A laser sensor 320 and a photoelectric sensor 321 are respectively installed inside the two grooves 319;

[0040] Two symmetrically arranged support plates 322 are installed inside the base 31. A metal rod 323 and a terminal 324 are jointly arranged inside the two support plates 322. A resistance wire 325 is arranged on the outside of the terminal 324. A sliding piece 326 is arranged on the outside of the metal rod 323. An adjusting seat 327 is installed at the bottom end of the sliding piece 326. An iron block 328 is arranged inside the adjusting seat 327. A mounting seat 329 is installed inside the base 31 and outside the adjusting seat 327. The adjusting seat 327 is slidably connected inside the mounting seat 329. A second electromagnet 330 is installed on one side inside the mounting seat 329. A notch 331 is opened inside the fixing seat 32. The bottom plate 310 is located inside the notch 331. A transparent plate 332 and a lens 333 are respectively arranged inside the two grooves 319;

[0041] The motor 35 drives the lead screw 36 to drive the moving seat 37 to move along the chute 39. The first suction hood 312 adsorbs the surface floating dust through the first ventilation hole 315, and part of the dust falls into the first dust collection box 316. The first cleaning rack 314 is internally provided with a first sponge wipe 318 for wiping the surface of the projection lens 14. The second electromagnet 330 adjusts the position of the sliding piece 326 through the iron block 328. The metal rod 323 and the sliding piece 326 form a sliding rheostat to dynamically adjust the cleaning parameters according to the moving distance. The photoelectric sensor 321 detects the pollution degree through the lens 333, and the laser sensor 320 detects whether there is an obstacle. When there is an object blocking, the photoelectric sensor 321 pauses detection and retains the detection value of the current dust. When cleaning for a certain time, when the laser sensor 320 detects no obstacle, the photoelectric sensor 321 starts again to prevent an object from blocking the photoelectric sensor 321 and affecting the detection result. The photoelectric sensor 321 judges the pollution level through the reflectivity of the lens 333. The lens 333 simulates the pollution situation of the projection lens 14. If the detected pollution level is small, only the surface floating dust is adsorbed by the first suction hood 312. If the pollution level is large, the second electromagnet 330 is triggered to enhance the magnetic force, and the position of the sliding piece 326 is adjusted to increase the power of the blower 21, so that the first suction hood 312 performs secondary cleaning. The first dust collection box 316 and the second dust collection box 48 collect the dust generated by the secondary cleaning to avoid repeated pollution.

[0042] The second cleaning component 4 includes a base 41 installed on the front side of the projector component 1. A third electromagnet 42 is embedded inside the base 41. A sliding seat 43 is slidably connected inside the base 41 and on top of the third electromagnet 42. A fourth electromagnet 44 is embedded at the bottom of the sliding seat 43. A second suction hood 45 and a second cleaning rack 46 are respectively installed on the top of the sliding seat 43. A second baffle 412 is arranged between the second suction hood 45 and the second cleaning rack 46. A plurality of groups of second ventilation holes 47 are opened on one side of the second suction hood 45. The bottom of the second suction hood 45 is connected to a second dust collection box 48. A second sponge wipe 49 is arranged inside the second cleaning rack 46. Expansion rods 410 are installed at the tops of the second suction hood 45 and the second cleaning rack 46. Fifth electromagnets 411 are installed at the telescopic ends of the two expansion rods 410.

[0043] When the fifth electromagnet 411 and the first electromagnet 317 are energized and attracted to each other, the telescopic ends of the expansion rods 410 extend. At this time, the first suction hood 312 and the first cleaning rack 314 drive the second suction hood 45 and the second cleaning rack 46 installed at the bottom to move through the expansion rods 410 respectively. When cleaning the projection lens 14, the heat generated during the use of the projection lens 14 is also dissipated. And there is a certain distance between the second suction hood 45 and the projection lens 14 to prevent scratching the projection lens 14. When the cleaning is over, the first baffle 313 and the second baffle 412 block the lens 333 and the projection lens 14 respectively to protect them respectively.

[0044] After the projector body 11 finishes its use, in order to prevent dust from adhering to the surface of the projection lens 14 and affecting the subsequent use effect, the user remotely activates multiple devices among the dust collection component 2, the first cleaning component 3, and the second cleaning component 4. The blower 21 sucks air through the air inlet pipe 23 to work. The motor 35 drives the lead screw 36 to rotate. The moving seat 37 is linearly moved within the fixed seat 32 through the settings of the slider 38 and the chute 39. The moving seat 37 drives the connecting frame 311 to move through the bottom plate 310. The laser sensor 320 is activated to detect whether there are obstacles ahead, and the photoelectric sensor 321 is activated to detect the dust on the surface of the lens 333. The dust information detected by the photoelectric sensor 321 is transmitted to the processor. When the first suction hood 312 moves towards the lens 333, the laser sensor 320 first detects an obstacle ahead. The laser sensor 320 transmits the signal to the photoelectric sensor 321. At this time, the photoelectric sensor 321 saves the previously detected information and stays in a non-detection state for a certain period of time. At this time, the first suction hood 312 performs a dust suction operation on the transparent plate 332 and the lens 333;

[0045] When the first suction hood 312 sucks the dust from the lens 333, the second control valve 335 is in the closed state, and the first control valve 334 is opened. The shunt telescopic hose 34 and the air inlet pipe 23 introduce the dust-containing air flow into the collection box 22. The filter plate 25 in the collection box 22 separates the dust, and the clean air is discharged through the air outlet hole 26. The box cover 27 is detachable for cleaning the accumulated dust. After the dust suction of the lens 333 is completed, the motor 35 rotates in the reverse direction to reset the first suction hood 312 until the laser sensor 320 detects no obstacles. Then the photoelectric sensor 321 is activated to detect the cleaned lens 333 ahead again. If the lens 333 ahead meets the standard of being detected as clean by the photoelectric sensor 321, the first electromagnet 317 and the fifth electromagnet 411 are simultaneously activated. Then the first control valve 334 automatically closes, and the second control valve 335 automatically opens. Then, through the setting of the telescopic rod 410, the fifth electromagnet 411 moves upward to fit with the first electromagnet 317. The motor 35 is started again, so that the first cleaning frame 314 and the first suction hood 312 drive the second cleaning frame 46 and the second suction hood 45 to move respectively, so that the second suction hood 45 sucks the dust from the projection lens 14;

[0046] If, after the first suction hood 312 finishes dust collection and resets, the photoelectric sensor 321 detects a large amount of dust on the surface of the lens 333 for the second time, at this time, the switch of the photoelectric sensor 321 controls the second electromagnet 330. When the photoelectric sensor 321 detects a large amount of dust, the stronger the magnetism of the second electromagnet 330. At this time, the adjustment seat 327 drives the sliding piece 326 to be located outside the resistance wire 325 to increase the current, which is used to control the fan 21 and strengthen the dust suction force of the fan 21. At this time, the motor 35 starts again, and the operation method is the same as the above steps, but only strengthens the dust suction force of the first suction hood 312 on the lens 333. When the photoelectric sensor 321 detects that the dust suction reaches the standard, the first electromagnet 317 and the fifth electromagnet 411 are started, and the second suction hood 45 can be used to suck dust from the projection lens 14;

[0047] If the dust suction force is strengthened and there is still some dust on the photoelectric sensor 321, it means that there is moisture on the lens 333 and the dust adheres to it. At this time, the motor 35 starts again and repeats the above steps for dust collection, but the moving distance of the first suction hood 312 becomes farther, so that the first sponge wiper 318 wipes the lens 333. After the wiping is completed, the motor 35 drives the first suction hood 312 to reset, and the cleaning is completed; at this time, the detected cleaning signal is recorded, and the first cleaning frame 314 and the first suction hood 312 drive the second cleaning frame 46 and the second suction hood 45 to move respectively. At this time, with the same dust suction force and moving distance, the second suction hood 45 sucks dust from the projection lens 14 and is wiped by the second sponge wiper 49. The projection lens 14 only needs to be cleaned once; simulating the cleaning work of the lens 333 is to prevent the projection lens 14 from being scratched when wiping due to a large amount of dust on its surface, and to improve the service life of the projection lens 14.

[0048] Embodiment 2

[0049] In this Embodiment 2, other structures remain unchanged. Different from Embodiment 1, the shunt telescopic hose 34 has two pipes respectively connected to the first suction hood 312 and the second suction hood 45. When the second suction hood 45 does not move, the second control valve 335 is in the closed state and the first control valve 334 is open to prevent the dispersed air flow; when the second suction hood 45 moves, the second control valve 335 opens and the first control valve 334 closes to avoid the problem of insufficient suction caused by the dispersed air flow.

[0050] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0051] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A projection device for education and teaching, comprising a projector assembly (1), characterized in that: Also includes: A dust collection component (2), a first cleaning component (3) and a second cleaning component (4), wherein the dust collection component (2) and the first cleaning component (3) are both mounted on the top of a projector component (1), wherein the projector component (1) comprises a projector body (11), wherein a projection mirror (14) is arranged on the front side of the projector body (11), and when the dust collection component (2) is powered on, it is respectively connected to the first cleaning component (3) and the second cleaning component (4) to form a negative pressure to absorb impurities, wherein the first cleaning component (3) is used to perform a simulated cleaning operation on the surface of the projection mirror (14), and when the first cleaning component (3) and the second cleaning component (4) are connected, a formal cleaning operation is performed on the projection mirror (14).

2. The projection device for education and teaching according to claim 1, characterized in that: A hanger (12) is arranged at the top center of the projector body (11), and a counterweight (13) is installed at one end of the top of the projector body (11).

3. The projection device for education and teaching according to claim 1, characterized in that: The dust collection assembly (2) comprises a fan (21) and a collection box (22) respectively mounted on the top of the projector assembly (1); an air inlet end of the fan (21) is connected to an air inlet pipe (23); an air outlet end of the fan (21) is connected to an air outlet pipe (24); one end of the air outlet pipe (24) is connected to the collection box (22); a filter plate (25) is arranged inside the collection box (22); an air outlet hole (26) is provided on one side of the collection box (22); and a box cover (27) is connected to the top of the collection box (22).

4. The projection device for education and teaching according to claim 1, characterized in that: The first cleaning component (3) comprises a base (31) mounted on one end of the top of the projector component (1); a fixing seat (32) is mounted on the top of the base (31); a fixing frame (33) is mounted on the top of the fixing seat (32); a flow-dividing telescopic hose (34) is connected to the interior of the fixing frame (33); and a first control valve (334) and a second control valve (335) are respectively arranged on the periphery of the flow-dividing telescopic hose (34).

5. The projection device for education and teaching according to claim 4, characterized in that: A motor (35) is installed on one side of the interior of the fixed seat (32); a screw rod (36) is connected to the power driving end of the motor (35); a movable seat (37) is connected to the outside of the screw rod (36); a slider (38) is installed on the top of the movable seat (37); a slide groove (39) is provided on the top of the interior of the fixed seat (32); the slider (38) is slidably connected to the inside of the slide groove (39); a bottom plate (310) is installed on the bottom of the movable seat (37); and a connecting frame (311) is installed on one side of the exterior of the bottom plate (310).

6. The projection device for education and teaching according to claim 5, characterized in that: A first air suction hood (312), a first baffle (313) and a first cleaning frame (314) are respectively installed at the bottom of the connecting frame (311); a plurality of groups of first ventilation holes (315) with equal distances are provided on one side of the first air suction hood (312); a first dust collecting box (316) is connected to the bottom of the first air suction hood (312); first electromagnets (317) are installed at the bottom ends of the first air suction hood (312) and the first cleaning frame (314); a first sponge (318) is arranged inside the first cleaning frame (314); two grooves (319) are provided inside the base (31); a laser sensor (320) and a photoelectric sensor (321) are respectively installed inside the two grooves (319).

7. The projection device for education and teaching according to claim 6, characterized in that: Two symmetrical support plates (322) are installed inside the base (31), and metal rods (323) and terminals (324) are respectively provided inside the two support plates (322). A resistance wire (325) is provided outside the terminals (324). A sliding plate (326) is provided outside the metal rod (323). An adjustment seat (327) is installed at the bottom end of the sliding plate (326). An iron block (328) is provided inside the adjustment seat (327). A mounting seat (329) is installed inside the mounting seat (31) and outside the adjusting seat (327); the adjusting seat (327) is slidably connected inside the mounting seat (329); a second electromagnet (330) is installed on one side inside the mounting seat (329); a notch (331) is provided inside the fixing seat (32); the bottom plate (310) is located inside the notch (331); and a transparent plate (332) and a lens (333) are respectively provided inside the two grooves (319).

8. The projection device for education and teaching according to claim 1, characterized in that: The second cleaning component (4) comprises a base (41) mounted on the front side of the projector component (1), a third electromagnet (42) being embedded in the base (41), a slide seat (43) being slidably connected to the top of the third electromagnet (42) in the base (41), and a fourth electromagnet (44) being embedded in the bottom of the slide seat (43).

9. The projection device for education and teaching according to claim 8, characterized in that: A second air suction hood (45) and a second cleaning rack (46) are respectively installed on the top of the sliding seat (43); a second baffle (412) is arranged between the second air suction hood (45) and the second cleaning rack (46); a plurality of groups of second ventilation holes (47) are opened on one side of the second air suction hood (45); a second dust collecting box (48) is connected to the bottom of the second air suction hood (45); and a second sponge (49) is arranged inside the second cleaning rack (46).

10. The projection device for education and teaching according to claim 9, characterized in that: The top ends of the second air suction hood (45) and the second cleaning frame (46) are both equipped with telescopic rods (410), and the telescopic ends of the two telescopic rods (410) are both equipped with fifth electromagnets (411).

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