Device and method for displaying three-dimensional model of earth through three-dimensional projection

Abstract

The invention discloses a device for displaying an earth stereoscopic model through three-dimensional projection, which comprises a projector main body, a heat dissipation mechanism, a dust removal mechanism, a scraping and sweeping mechanism and a driving mechanism are arranged in the projector main body, the projector main body comprises a shell, a projection spherical screen and a fisheye projector, and an operation panel is arranged on the front end surface of the shell. The projection dome screen is fixedly installed on the upper end face of the shell, a supporting frame is arranged in the shell, the fisheye projector is fixedly installed on the supporting frame to project the interior of the projection dome screen, and the heat dissipation mechanism comprises air draft fan blades, a first filter plate, a second filter plate and a radiator and is installed in the shell to dissipate heat of the fisheye projector. The three-dimensional projection device has the advantages of high heat dissipation efficiency and automatic cleaning, and solves the problems that a dust screen of a traditional three-dimensional projection device is easy to block, heat dissipation of the device is seriously affected, the device is easy to damage due to overheating, manual operation is needed during dust removal of a filter screen of the device, the efficiency is low, and dust is easy to enter the projector.

Description

Technical Field

[0001] The invention relates to the technical field of spherical screen projection, in particular to a device and a method for displaying a three-dimensional earth model by three-dimensional projection. Background Art

[0002] With the development of science and technology, 3D projection display technology has been widely used in education, exhibition, entertainment and other fields. In particular, the 3D projection display of the earth stereo model has been favored by users because of its intuitive and vivid characteristics. However, the existing 3D projection display equipment has some shortcomings in practical applications.

[0003] As a display of a three-dimensional model of the earth, it needs to work for a long time. The fisheye projector will generate a lot of heat when working for a long time. If the heat dissipation is poor, it will cause the equipment to overheat and affect the projection effect. After the traditional three-dimensional projection display equipment has been used for a period of time, its dust screen will be blocked, which will seriously affect the heat dissipation of the equipment. It is necessary to manually clean the internal dust and lint, which is not only time-consuming and laborious, but also may cause dust and hair in the external environment to easily enter the equipment due to improper operation, resulting in dust accumulation in internal components, affecting the heat dissipation and projection effect of the equipment. Therefore, a device and method for displaying a three-dimensional earth model with three-dimensional projection and a method thereof are needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for three-dimensional projection display of a stereoscopic model of the earth, which has the advantages of high heat dissipation efficiency and automatic cleaning, and solves the problem that the dust screen of traditional three-dimensional projection equipment is easily blocked, seriously affecting the heat dissipation of the equipment, easily causing overheating and damage to the equipment, and the dust removal of the equipment filter requires manual operation, which is inefficient and easily causes dust to enter the projector.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a device for three-dimensionally projecting a stereoscopic model of the earth, comprising a projector body, wherein a heat dissipation mechanism, a dust removal mechanism, a scraping mechanism and a driving mechanism are arranged in the projector body;

[0006] The projector body includes a housing, a projection ball screen and a fisheye projector, wherein the front end surface of the housing is provided with an operation panel, the projection ball screen is fixedly mounted on the upper end surface of the housing, a support frame is provided inside the housing, and the fisheye projector is fixedly mounted on the support frame to project inside the projection ball screen;

[0007] The heat dissipation mechanism comprises an exhaust fan blade, a first filter plate, a second filter plate and a radiator, and the heat dissipation mechanism is installed in the housing to dissipate heat for the fisheye projector;

[0008] The dust removal mechanism comprises a dust removal brush and a transmission turntable, and the dust removal mechanism is installed on the outer side of the second filter plate to remove dust from it;

[0009] The scraping mechanism comprises a scraping comb and a silica gel brush plate, and the scraping mechanism is installed on the outer side of the second filter plate to scrape the dust removal brush;

[0010] The driving mechanism comprises a driving motor, a first gear, a second gear, a transmission shaft, a third gear, a fourth gear and a fifth gear. The driving mechanism is installed in the projector body to drive the radiator mechanism and the dust removal mechanism.

[0011] As a preferred device for three-dimensional projection display of a stereoscopic earth model of the present invention, dust cleaning windows are arranged on the left and right sides of the shell, the first filter plate is interference installed in the dust cleaning window, the second filter plate is fixedly installed in the shell, a dust collecting chamber is formed between the first filter plate and the second filter plate, filter holes are arranged on the second filter plate, the filter holes are arranged in a fan shape, the exhaust fan blades are installed on the inner side of the second filter plate, and the radiator is fixedly installed at the bottom of the fisheye projector.

[0012] As a preferred device for three-dimensionally projecting a stereoscopic model of the earth according to the present invention, a first rotating shaft is provided in the middle of the side surface of the dust removal brush, an axial hole matching with the first rotating shaft is provided on the second filter plate, bristles matching with the filter hole are provided on the side surface of the dust removal brush, an eccentric shaft is provided on the transmission turntable, and a first sliding groove matching with the eccentric shaft is provided at the bottom of the bottom side end surface of the dust removal brush.

[0013] As a preferred device for three-dimensionally projecting a stereoscopic model of the earth according to the present invention, a second rotating shaft is provided on the bottom side end face of the scraping comb, and the scraping comb is rotatably connected to the second filter plate through the second rotating shaft. The scraping comb is located between the dust removal brush and the second filter plate, and combing grooves corresponding to the bristles are provided on the front and back sides of the scraping comb.

[0014] As a preferred device for three-dimensionally projecting a stereoscopic model of the earth according to the present invention, a second slide groove is provided in the middle of the side end surface of the scraping comb, and a sliding rod cooperating with the second slide groove is provided on the dust removal brush. The sliding rod is inserted into the second slide groove and is slidably connected with the scraping comb.

[0015] As a preferred device for three-dimensionally projecting a stereoscopic earth model of the present invention, the silicone brush plate is fixedly installed on the side end surface of the second filter plate, the number of the silicone brush plates is two, the two groups of silicone brush plates are arranged in an eight-shaped shape, and the side surfaces of the silicone brush plates are in contact with the side surfaces of the scraping comb.

[0016] As a preferred device for three-dimensional projection display of a stereoscopic earth model of the present invention, the drive motor is fixedly mounted on the lower end surface of the support frame, the first gear is fixedly mounted on the output shaft of the drive motor, the second gear is mounted on the transmission shaft and meshes with the first gear, and the transmission turntable is mounted on the left and right ends of the transmission shaft.

[0017] As a preferred device for three-dimensionally projecting a stereoscopic model of the earth according to the present invention, a third rotating shaft is provided on the side of the support frame, the third gear and the fourth gear are both fixedly mounted on the third rotating shaft, the third gear is meshed with the first gear for transmission, and a fifth gear meshed with the fourth gear is provided on the central axis of the exhaust fan blade.

[0018] As a preferred device for displaying a three-dimensional earth model through three-dimensional projection of the present invention, a one-way bearing is provided between the second gear and the transmission shaft, and the second gear and the transmission shaft are rotationally connected via the one-way bearing.

[0019] A method for using a device for displaying a three-dimensional model of the earth through three-dimensional projection, comprising the following steps:

[0020] Step 1: Start the fisheye projector, and use the fisheye head to project a preset earth pattern on the projection ball screen;

[0021] Step 2: Start the driving mechanism to make the driving motor rotate forward, thereby driving the heat dissipation mechanism to work, and the exhaust fan blades rotate to accelerate the air flow to dissipate heat facing the fisheye projector;

[0022] Step 3: Clean regularly. Turn off the fisheye projector regularly through the operation panel, start the driving mechanism in reverse, and drive the dust removal mechanism to remove dust from the second filter plate. At the same time, drive the brush sweeping mechanism to comb the dust removal brush, and the exhaust fan blades are reversed to blow the swept dust away from the second filter plate to keep the second filter plate transparent.

[0023] Step 4: Clean the equipment, open the first filter plate, and clean the dust chamber.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention significantly improves the working temperature management of the fisheye projector by integrating an advanced heat dissipation mechanism, ensures the stable performance of the device during long-term continuous operation, and effectively extends the service life of the device. The heat dissipation mechanism adopts a multi-stage filtration system, which can effectively block large particles such as dust and hair in the external environment from entering the device, thereby significantly reducing the risk of equipment failure caused by dust accumulation. This design not only helps to maintain the clean state of the inside of the device, but also ensures that the quality of the projected image is consistent and is not affected by external pollution.

[0026] 2. The present invention cleverly combines the design of the dust removal mechanism and the scraping mechanism to achieve efficient and automatic self-cleaning of the equipment. Specifically, when the dust removal mechanism cleans the second filter plate, the scraping mechanism will simultaneously clean the dust removal brush to ensure that the dust removal brush always remains clean. This design eliminates the inconvenience of frequent manual cleaning of traditional equipment, greatly improves the automation level of the equipment, and also reduces the maintenance burden of the user, so that the equipment can maintain the best working condition for a long time.

[0027] 3. The present invention has successfully realized the airflow control in different directions in the two working modes of heat dissipation and dust removal through the careful design of the driving mechanism. Under normal working conditions, the driving mechanism can generate effective cooling airflow to help reduce the working temperature of the fisheye projector; while in the cleaning mode, it can generate outward sweeping airflow to effectively remove dust on the second filter plate and prevent dust from entering the device again. This intelligent airflow control system not only improves the overall performance of the device, but also provides users with a safer and more reliable use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An exploded view of the present invention;

[0029] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 3 It is a front cross-sectional view of the present invention;

[0031] Figure 4 It is a schematic diagram of the coordination state of the dust removal mechanism and the scraping mechanism of the present invention;

[0032] Figure 5 It is a schematic diagram of the driving mechanism structure of the present invention;

[0033] Figure 6 For the present invention Figure 4 Enlarged view of point A in the middle;

[0034] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle.

[0035] In the figure: 1. Projector body; 101. Housing; 1011. Operation panel; 1012. Cleaning window; 1013. Dust collecting chamber; 102. Projection ball screen; 103. Fisheye projector; 1032. Support frame; 1034. Third rotating shaft; 2. Heat dissipation mechanism; 201. Fan blade; 202. First filter plate; 203. Second filter plate; 2031. Shaft hole; 2032. Filter hole; 204. Radiator; 3. Dust removal mechanism; 301. Dust removal brush; 3011. Bristles; 3012 , first slide; 3013, slide rod; 3014, first rotating shaft; 302, transmission turntable; 3021, eccentric shaft; 4, scraping mechanism; 401, scraping comb; 4011, second rotating shaft; 4012, second slide; 4013, combing groove; 402, silicone brush plate; 5, driving mechanism; 501, driving motor; 502, first gear; 503, second gear; 504, transmission shaft; 505, one-way bearing; 506, third gear; 507, fourth gear; 508, fifth gear. DETAILED DESCRIPTION

[0036] Example 1

[0037] See also Figure 1-Figure 7 , a device for three-dimensional projection display of a three-dimensional model of the earth, comprising a projector body 1, wherein a heat dissipation mechanism 2, a dust removal mechanism 3, a scraping mechanism 4 and a driving mechanism 5 are arranged in the projector body 1;

[0038] The projector body 1 includes a housing 101, a projection ball screen 102 and a fisheye projector 103. The front end surface of the housing 101 is provided with an operation panel 1011. The projection ball screen 102 is fixedly mounted on the upper end surface of the housing 101. A support frame 1032 is provided in the housing 101. The fisheye projector 103 is fixedly mounted on the support frame 1032 to project inside the projection ball screen 102.

[0039] The heat dissipation mechanism 2 includes an exhaust fan blade 201, a first filter plate 202, a second filter plate 203 and a radiator 204. The heat dissipation mechanism 2 is installed in the housing 101 to dissipate heat for the fisheye projector 103;

[0040] The dust removal mechanism 3 includes a dust removal brush 301 and a transmission turntable 302. The dust removal mechanism 3 is installed on the outer side of the second filter plate 203 to remove dust from it;

[0041] The scraping mechanism 4 includes a scraping comb 401 and a silicone brush plate 402. The scraping mechanism 4 is installed on the outer side of the second filter plate 203 to scrape the dust removal brush 301.

[0042] The driving mechanism 5 includes a driving motor 501 , a first gear 502 , a second gear 503 , a transmission shaft 504 , a third gear 506 , a fourth gear 507 and a fifth gear 508 . The driving mechanism 5 is installed in the projector body 1 to drive the radiator 204 and the dust removal mechanism 3 .

[0043] Furthermore, cleaning windows 1012 are provided on the left and right sides of the outer shell 101, the first filter plate 202 is interference installed in the cleaning window 1012, the second filter plate 203 is fixedly installed in the outer shell 101, a dust collecting chamber 1013 is formed between the first filter plate 202 and the second filter plate 203, filter holes 2032 are provided on the second filter plate 203, the filter holes 2032 are arranged in a fan shape, the exhaust fan blades 201 are installed on the inner side of the second filter plate 203, and the radiator 204 is fixedly installed at the bottom of the fisheye projector 103.

[0044] The fan blades 201 rotate to extract air for ventilation, thereby dissipating heat from the fisheye projector 103. The first filter plate 202 intercepts large particles of impurities, and the second filter plate 203 intercepts dust and hair, thereby collecting dust inside the surface device, affecting the projection effect and heat dissipation effect of the device.

[0045] Furthermore, a first rotating shaft 3014 is provided in the middle part of the side of the dust removal brush 301, an axial hole 2031 cooperating with the first rotating shaft 3014 is provided on the second filter plate 203, bristles 3011 cooperating with the filter hole 2032 are provided on the side of the dust removal brush 301, an eccentric shaft 3021 is provided on the transmission turntable 302, and a first sliding groove 3012 slidably cooperating with the eccentric shaft 3021 is provided at the bottom of the bottom side end surface of the dust removal brush 301.

[0046] When the transmission turntable 302 rotates, the eccentric shaft 3021 on its side will produce a forward and backward displacement, driving the dust removal brush 301 to swing back and forth, thereby brushing the filter hole 2032 and sweeping off the fluff and dust on its surface. The first slide groove 3012 is designed to provide a certain longitudinal displacement space for the eccentric shaft 3021 to avoid interference with the emission motion.

[0047] Furthermore, a second rotating shaft 4011 is provided on the bottom side end face of the scraping comb 401, and the scraping comb 401 is rotatably connected to the second filter plate 203 via the second rotating shaft 4011. The scraping comb 401 is located between the dust removal brush 301 and the second filter plate 203, and combing grooves 4013 corresponding to the bristles 3011 are provided on the front and back sides of the scraping comb 401.

[0048] When the dust removal brush 301 swings left and right, when the dust removal brush 301 passes through the scraping comb 401, the scraping comb 401 processes the bristles 3011 on the dust removal brush 301, and combs off the hair and lint entangled on the bristles 3011, thereby keeping the cleaning brush clean and improving the dust removal effect.

[0049] Furthermore, a second slide groove 4012 is provided in the middle of the side end surface of the scraping comb 401 , and a sliding rod 3013 cooperating with the second slide groove 4012 is provided on the dust removal brush 301 . The sliding rod 3013 is inserted into the second slide groove 4012 and is slidably connected with the scraping comb 401 .

[0050] When the dust removal brush 301 swings back and forth along the first rotating shaft 3014 under the action of the transmission turntable 302, the scraping comb 401 is driven to swing back and forth along the second rotating shaft 4011 through the cooperation of the sliding rod 3013 and the second sliding groove 4012, so that the scraping comb 401 can move the scraped dust and lint to the front and rear sides to avoid accumulation in the center of the dust collecting chamber 1013, which would affect the rotation of the transmission turntable 302 and facilitate the cooperation between the scraping comb 401 and the silicone brush plate 402.

[0051] Furthermore, the silicone brush plate 402 is fixedly installed on the side end surface of the second filter plate 203 . There are two silicone brush plates 402 . The two groups of silicone brush plates 402 are arranged in an eight-shaped shape. The side surfaces of the silicone brush plates 402 are in contact with the side surfaces of the scraping comb 401 .

[0052] When the scraping comb 401 is swung to the silicone brush plate 402, the fluff and dust on the scraping comb 401 are scraped off by the silicone brush plate 402 and fall on the front and back sides of the dust collecting chamber 1013, thereby avoiding excessive fluff and hair from being entangled on the scraping comb 401 and affecting the scraping effect of the scraping comb 401.

[0053] Furthermore, the drive motor 501 is fixedly mounted on the lower end surface of the support frame 1032, the first gear 502 is fixedly mounted on the output shaft of the drive motor 501, the second gear 503 is mounted on the transmission shaft 504 and meshes with the first gear 502, and the transmission turntable 302 is mounted on the left and right ends of the transmission shaft 504.

[0054] Through the cooperation between the first gear 502 and the second gear 503 of the motor, the driving motor 501 drives the transmission shaft 504 to rotate, thereby driving the dust removal brush 301 and the scraping comb 401 to swing back and forth, and performing dust removal operations on the second filter plate 203, so that the second filter plate 203 remains transparent and the heat dissipation effect is improved.

[0055] Furthermore, a third rotating shaft 1034 is provided on the side of the support frame 1032, and the third gear 506 and the fourth gear 507 are fixedly mounted on the third rotating shaft 1034. The third gear 506 is meshed with the first gear 502 for transmission, and a fifth gear 508 meshed with the fourth gear 507 is provided on the central axis of the exhaust fan blade 201.

[0056] The drive motor 501, the first gear 502, the third gear 506, the fourth gear 507 and the fifth gear 508 are used to drive the exhaust fan blades 201 to rotate, so that the drive motor 501 can drive the exhaust fan blades 201 and the dust removal mechanism 3 at the same time. When the equipment is dusted, an outward airflow can be generated to blow out the dust generated during the scraping process.

[0057] The gear ratio of the first gear 502 to the second gear 503 is 1:3, the gear ratio of the first gear 502 to the third gear 506 is 5:1, the gear ratio of the third gear 506 to the fourth gear 507 is 1:5, and the gear ratio of the fourth gear 507 to the fifth gear 508 is 3:1, so that the driving motor 501 drives the exhaust fan to rotate at high speed, while the dust removal mechanism 3 and the scraping mechanism 4 swing at low speed.

[0058] Furthermore, a one-way bearing 505 is provided between the second gear 503 and the transmission shaft 504 , and the second gear 503 and the transmission shaft 504 are rotationally connected via the one-way bearing 505 .

[0059] When the driving motor 501 rotates forward, it only drives the exhaust and heat dissipation rotation, so that the exhaust fan blades 201 draw air into the outer casing 101 to dissipate heat for the fisheye projector 103. When dust removal is needed, the driving motor 501 is controlled to reverse through the operation panel 1011, thereby driving the exhaust fan blades 201 to reverse, generating a smaller outward airflow to reversely blow the second filter plate 203, and driving the dust removal mechanism 3 and the brushing mechanism to work at the same time. On the one hand, it prevents dust from being sucked into the projector body 1, and on the other hand, the weak airflow is enough to blow the swept dust away from the side of the second filter plate 203, and can prevent dust from flying.

[0060] When using this device, first connect the three-dimensional projection device for displaying the stereoscopic earth model to a stable power socket, start the system through the operation panel 1011, choose to start the fisheye projector 103 through the operation panel 1011, the fisheye projector 103 starts working, and projects a preset earth pattern through the projection ball screen 102. When the device starts working, start the heat dissipation mode through the operation panel 1011. At this time, the driving motor 501 rotates forward, and is transmitted through the first gear 502, the third gear 506, the fourth gear 507 and the fifth gear 508, thereby driving the exhaust fan blades 201 to rotate. The exhaust fan blades 201 start to rotate, generating an inward airflow, sucking air from the dust cleaning windows 1012 on both sides of the equipment, filtering through the first filter plate 202 and the second filter plate 203, and finally sucked in and discharged by the exhaust fan blades 201, thereby achieving effective heat dissipation of the fisheye projector 103. When the equipment needs to be cleaned, the fisheye projector 103 is first turned off through the operation panel 1011, and the cleaning mode is selected through the operation panel 1011. At this time, the driving motor 501 is reversed. When the driving motor 501 is reversed, the first gear 502 and the third gear 506 are engaged, driving the third shaft 1034 to rotate, and then the fourth gear 507 and the fifth gear 508 are engaged, so that the exhaust fan blades 201 are reversed, generating The second gear 503 drives the transmission shaft 504 to rotate through the one-way bearing 505, and the transmission turntable 302 rotates accordingly. The eccentric shaft 3021 produces a forward and backward displacement under the rotation of the transmission turntable 302, driving the dust removal brush 301 to swing back and forth, brushing the filter holes 2032 on the second filter plate 203 to remove dust and fluff. During the swinging process, the dust removal brush 301 drives the scraping comb 401 to swing back and forth along the second rotating shaft 4011 through the cooperation of the sliding rod 3013 and the second sliding groove 4012. The combing groove 4013 on the scraping comb 401 combs the bristles 3011 on the dust removal brush 301 to remove dust and fluff on the bristles 3011. During the swinging process, the scraping comb 401 will contact the two silicone brush plates 402 fixed on the cleaning plate. The silicone brush plates 402 scrape the dust and fluff on the scraping comb 401 and drop them into the dust collecting chamber 1013.

[0061] Example 2

[0062] See also Figure 1-Figure 7 A method for using a device for three-dimensional projection display of a three-dimensional model of the earth comprises the following steps:

[0063] Step 1, connect the device to the power socket through a wire, start the fisheye projector 103, select to start the fisheye projector 103 through the operation panel 1011, the fisheye projector 103 starts to work, and projects a preset earth pattern through the projection ball screen 102;

[0064] Step 2, select to start the heat dissipation mode through the operation panel 1011. At this time, the drive motor 501 starts to rotate forward. When the drive motor 501 rotates forward, it is transmitted through the first gear 502, the third gear 506, the fourth gear 507 and the fifth gear 508, thereby driving the exhaust fan blade 201 to rotate. The exhaust fan blade 201 starts to rotate, generating an inward airflow, which is sucked in from the dust cleaning windows 1012 on both sides of the device, filtered by the first filter plate 202 and the second filter plate 203, and finally sucked in by the exhaust fan blade 201 and discharged after cooling the fisheye projector 103. This process effectively removes the heat inside the device and achieves heat dissipation for the fisheye projector 103;

[0065] Step 3: To ensure the heat dissipation efficiency of the device, the operation panel 1011 is used to set the device to be cleaned regularly when not in operation. First, the fisheye projector 103 is turned off to ensure that the device is not in operation to avoid affecting the projection effect during the cleaning process. The cleaning mode is selected through the operation panel 1011. At this time, the drive motor 501 starts to reverse. When the drive motor 501 reverses, the first gear 502 and the third gear 506 are engaged to drive the third shaft 1034 to rotate, and then the fourth gear 507 and the fifth gear 508 are engaged to reverse the fan blades 201 to generate an outward airflow. At the same time, the second gear 503 drives the transmission shaft 504 to rotate through the one-way bearing 505, and the transmission turntable 302 rotates accordingly. The eccentric shaft 3021 produces a forward and backward displacement under the rotation of the transmission turntable 302, driving the dust removal brush 301 to swing back and forth, brushing the filter holes 2032 on the second filter plate 203 to remove dust and fluff, and the combing grooves 4013 on the scraping comb 401 comb the bristles 3011 on the dust removal brush 301 to remove dust and fluff on the bristles 3011;

[0066] Step 4, equipment cleaning. After completing the cleaning mode, turn off the equipment through the operation panel 1011 to ensure that the equipment is completely stopped. Gently open the cleaning windows 1012 on both sides of the shell 101 by hand. These windows are designed to facilitate users to clean the dust chamber 1013. Take out the first filter plate 202 from the cleaning window 1012. The first filter plate 202 is installed in the cleaning window 1012 by interference fit. Be careful to handle it with care when taking it out. Use a soft brush or vacuum cleaner to clean the dust and debris in the dust chamber 1013 to ensure that the inside of the dust chamber 1013 is clean and free of residue to prevent dust from entering the equipment again.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for three-dimensionally projecting a stereoscopic model of the earth, comprising a projector body (1), characterized in that: The projector body (1) is provided with a heat dissipation mechanism (2), a dust removal mechanism (3), a scraping mechanism (4) and a driving mechanism (5); The projector body (1) comprises a housing (101), a projection ball screen (102) and a fisheye projector (103); the front end surface of the housing (101) is provided with an operation panel (1011); the projection ball screen (102) is fixedly mounted on the upper end surface of the housing (101); a support frame (1032) is arranged inside the housing (101); and the fisheye projector (103) is fixedly mounted on the support frame (1032) to project the inside of the projection ball screen (102); The heat dissipation mechanism (2) comprises an exhaust fan blade (201), a first filter plate (202), a second filter plate (203) and a radiator (204); the heat dissipation mechanism (2) is installed in the housing (101) to dissipate heat for the fisheye projector (103); The dust removal mechanism (3) comprises a dust removal brush (301) and a transmission turntable (302), and the dust removal mechanism (3) is installed on the outer side of the second filter plate (203) to remove dust from the second filter plate; The scraping mechanism (4) comprises a scraping comb (401) and a silica gel brush plate (402), and the scraping mechanism (4) is installed on the outer side of the second filter plate (203) to scrape the dust removal brush (301); The driving mechanism (5) comprises a driving motor (501), a first gear (502), a second gear (503), a transmission shaft (504), a third gear (506), a fourth gear (507) and a fifth gear (508); the driving mechanism (5) is installed in the projector body (1) to drive the heat sink (204) mechanism and the dust removal mechanism (3).

2. The device for displaying a three-dimensional earth model by three-dimensional projection according to claim 1, characterized in that: The left and right sides of the housing (101) are provided with dust cleaning windows (1012); the first filter plate (202) is interference-mounted in the dust cleaning window (1012); the second filter plate (203) is fixedly mounted in the housing (101); a dust collecting chamber (1013) is formed between the first filter plate (202) and the second filter plate (203); the second filter plate (203) is provided with filter holes (2032); the exhaust fan blade (201) is mounted on the inner side of the second filter plate (203); and the radiator (204) is fixedly mounted at the bottom of the fisheye projector (103).

3. The device for displaying a three-dimensional model of the earth by three-dimensional projection according to claim 1, characterized in that: A first rotating shaft (3014) is arranged in the middle of the side surface of the dust removal brush (301), an axial hole (2031) cooperating with the first rotating shaft (3014) is arranged on the second filter plate (203), bristles (3011) cooperating with the filter holes (2032) are arranged on the side surface of the dust removal brush (301), an eccentric shaft (3021) is arranged on the transmission turntable (302), and a first sliding groove (3012) slidably cooperating with the eccentric shaft (3021) is arranged at the bottom of the bottom side end surface of the dust removal brush (301).

4. The device for displaying a three-dimensional earth model by three-dimensional projection according to claim 3, characterized in that: A second rotating shaft (4011) is provided on the bottom side end face of the scraping comb (401), and the scraping comb (401) is rotatably connected to the second filter plate (203) via the second rotating shaft (4011). The scraping comb (401) is located between the dust removal brush (301) and the second filter plate (203), and combing grooves (4013) corresponding to the bristles (3011) are provided on the front and rear sides of the scraping comb (401).

5. The device for displaying a three-dimensional model of the earth by three-dimensional projection according to claim 4, characterized in that: A second slide groove (4012) is provided in the middle of the side end surface of the scraping comb (401), and a sliding rod (3013) cooperating with the second slide groove (4012) is provided on the dust removal brush (301), and the sliding rod (3013) is inserted into the second slide groove (4012) and is slidably connected with the scraping comb (401).

6. The device for displaying a three-dimensional model of the earth by three-dimensional projection according to claim 5, characterized in that: The silica gel brush plate (402) is fixedly mounted on the side end surface of the second filter plate (203), the number of the silica gel brush plates (402) is two, and the two groups of silica gel brush plates (402) are arranged in an eight-shaped shape.

7. The device for displaying a three-dimensional model of the earth by three-dimensional projection according to claim 1, characterized in that: The driving motor (501) is fixedly mounted on the lower end surface of the support frame (1032); the first gear (502) is fixedly mounted on the output shaft of the driving motor (501); the second gear (503) is mounted on the transmission shaft (504) and meshes with the first gear (502); and the transmission turntable (302) is mounted on the left and right ends of the transmission shaft (504).

8. The device for displaying a three-dimensional earth model by three-dimensional projection according to claim 7, characterized in that: A third rotating shaft (1034) is arranged on the side of the support frame (1032); the third gear (506) and the fourth gear (507) are both fixedly mounted on the third rotating shaft (1034); the third gear (506) is meshed with the first gear (502) for transmission; and a fifth gear (508) meshed with the fourth gear (507) is arranged on the central axis of the exhaust fan blade (201).

9. The device for displaying a three-dimensional model of the earth by three-dimensional projection according to claim 7, characterized in that: A one-way bearing (505) is provided between the second gear (503) and the transmission shaft (504), and the second gear (503) and the transmission shaft (504) are rotatably connected via the one-way bearing (505).

10. A method for using a device for displaying a three-dimensional earth model through three-dimensional projection, applicable to a device for displaying a three-dimensional earth model through three-dimensional projection as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, starting the fisheye projector (103), and projecting a preset earth pattern on the projection ball screen (102) through the fisheye head; Step 2, starting the driving mechanism (5) to make the driving motor (501) rotate forward, thereby driving the heat dissipation mechanism (2) to work, and the exhaust fan blades (201) to rotate, accelerating the air flow to dissipate heat towards the fisheye projector (103); Step 3, regular cleaning, the fisheye projector (103) is regularly turned off through the operation panel (1011), and the driving mechanism (5) is reversely started, the driving mechanism (5) drives the dust removal mechanism (3) to remove dust from the second filter plate (203), and at the same time drives the brush sweeping mechanism to comb the dust removal brush (301), and the exhaust fan blade (201) is reversed to blow the swept dust to the side away from the second filter plate (203), so that the second filter plate (203) remains transparent; Step 4: Clean the equipment. Open the first filter plate (202) and clean the dust collecting chamber (1013).

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