Projection equipment and projection system

Abstract

The utility model discloses projection equipment and a projection system, and the projection equipment comprises a housing which is provided with a first opening, and the housing and the first opening jointly form a cavity; the imaging assembly is arranged in the cavity; the light source assembly is arranged in the cavity; the lens assembly is arranged at the first opening; and the ion fan is connected with the shell, the ion fan is provided with a first air opening, and the first air opening faces the imaging assembly. Air flows through the ion fan to form forced convection, and an internal circulation air duct is formed in the cavity of the projection equipment and used for cooling structures such as an imaging assembly in the cavity. On one hand, the cavity space can be saved for arranging other structural members or reducing the overall size of the projection equipment; on the other hand, larger air volume can be obtained, the heat dissipation effect is improved, and the defect that the display picture is abnormal due to uneven temperature of the imaging assembly can be overcome to a certain extent.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of projection devices, and particularly relates to a projection device and a projection system. Background Art

[0002] In related technologies, projection devices use axial fans, centrifugal fans and other fans to form convective air to dissipate heat from the projection devices. However, such fans not only occupy a large space and have a low wind speed, but also have a poor heat dissipation effect on the imaging component, resulting in uneven temperature of the imaging component and easily causing the risk of abnormal display images of the imaging component.

[0003] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] This application aims to at least solve to some extent the technical problem of abnormal display images caused by uneven temperature of the imaging component of the projection device. To this end, this application provides a projection device and a projection system.

[0005] A projection device provided by an embodiment of this application, the projection device includes:

[0006] A housing having a first opening, and the housing and the first opening together form a cavity;

[0007] An imaging component disposed in the cavity;

[0008] A light source component disposed in the cavity;

[0009] A lens component disposed at the first opening; and,

[0010] An ion fan connected to the housing, the ion fan having a first air outlet, and the first air outlet facing the imaging component.

[0011] In some embodiments, the ion fan includes a fan housing, a first electrode assembly, and a second electrode assembly having a polarity opposite to that of the first electrode assembly;

[0012] Wherein, the fan housing has a port and the first air outlet, and the fan housing, the port and the first air outlet together form a fan cavity;

[0013] The first electrode assembly is disposed in the fan cavity;

[0014] The second electrode assembly is disposed opposite to the first electrode assembly at the port, and the second electrode assembly is provided with a second air vent.

[0015] In some embodiments, both the first electrode assembly and the second electrode assembly are plate-shaped.

[0016] In some embodiments, the second electrode assembly includes a second electrode plate and a plurality of second electrode pins disposed on the second electrode plate, and the second air vent is disposed on the second electrode plate;

[0017] The first electrode assembly includes a first electrode plate and first electrode pins disposed on the first electrode plate corresponding to the second electrode pins one by one.

[0018] In some embodiments, the first electrode pin is any one of a conical shape, a columnar shape, a plate shape, a filament shape, a mesh shape, and a ring shape; the second electrode pin is any one of a conical shape, a columnar shape, a plate shape, a filament shape, a mesh shape, and a ring shape.

[0019] In some embodiments, a first air vent is formed in a first shell portion of the blower housing corresponding to between the first electrode assembly and the second electrode assembly.

[0020] In some embodiments, the first electrode plate and the blower housing are of an integral structure.

[0021] In some embodiments, a first air vent is formed in a second shell portion of the blower housing corresponding to a side of the first electrode assembly away from the second electrode assembly, and ventilation holes are formed in the first electrode plate.

[0022] In some embodiments, the ventilation holes are disposed on the first electrode plate corresponding to the first electrode pins one by one.

[0023] In some embodiments, a wind guiding portion is provided adjacent to the first air vent of the blower housing.

[0024] In some embodiments, the blower housing is buckled on the housing, and both the port and the first air vent communicate with the cavity.

[0025] A projection system provided by an embodiment of the present application, the projection system includes a projection screen and the above-mentioned projection device, and the projection screen is used to receive a projection image of the projection device.

[0026] The embodiment of the present application has at least the following beneficial effects:

[0027] In the above projection device, the ion blower is connected to the housing, and at the same time, the first air outlet of the ion blower faces the imaging component. The ion blower causes air to flow to form forced convection, and an internal circulation air duct is formed in the cavity of the projection device for dissipating heat from structures such as the imaging component in the cavity. On the one hand, the ion blower is small in volume and occupies less space, which can save the cavity space of the projection device for arranging other structural components, or reduce the overall volume of the projection device; on the other hand, the ion blower is a device that generates air flow using ion technology, without the pneumatic noise and mechanical noise generated by the rotation of the fan blades, which can reduce the noise of the projection device, and the air volume of the ion blower can be adjusted by voltage, and a larger air volume can be obtained by adjusting the voltage, thereby improving the heat dissipation effect on the imaging component, etc., and can solve to a certain extent the defect of abnormal display images caused by uneven temperature of the imaging component; in addition, the ion blower has a dust removal function, which can adsorb dust in the cavity, prevent dust from accumulating on the imaging component and affecting the projection effect of the projection device, and at the same time can also prevent the heat dissipation effect or short - circuit defect of the projection device from being affected due to dust accumulation. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 Shows a schematic diagram of the principle of the ion blower in the embodiment of the present application;

[0030] Figure 2 Shows a cross - sectional view of the projection device in the embodiment of the present disclosure;

[0031] Figure 3 Shows Figure 2 a three - dimensional structure diagram of the ion blower in the projection device in

[0032] Figure 4 Shows Figure 2 a three - dimensional structure diagram of the ion blower from another angle in

[0033] Figure 5 Shows Figure 2 a bottom view of the ion blower in

[0034] Figure 6 Shows Figure 2 a side view of the ion blower in

[0035] Figure 7 Shows Figure 2 an exploded view of the ion blower in

[0036] Figure 8 shows Figure 7 a bottom view of the first electrode assembly in the ion blower;

[0037] Figure 9 shows Figure 3 a schematic diagram of the assembly process of the ion blower and the housing;

[0038] Figure 10 shows his Figure 9 a schematic diagram of the assembly effect of the ion blower and the housing;

[0039] Figure 11 shows a three - dimensional structure diagram of a projection device in another embodiment of the present disclosure;

[0040] Figure 12 shows Figure 11 a three - dimensional structure schematic diagram of the ion blower in the projection device;

[0041] Figure 13 shows Figure 11 a three - dimensional structure schematic diagram of the ion blower from another angle;

[0042] Figure 14 shows Figure 12 an exploded view of the ion blower;

[0043] Figure 15 shows Figure 14 a three - dimensional structure schematic diagram of the blower housing in the ion blower;

[0044] Figure 16 shows Figure 14 a three - dimensional structure schematic diagram of the second electrode assembly in the ion blower.

[0045] Reference numerals:

[0046] 10. Collector; 20. Discharge electrode; 30. Power supply; 41. Positive ion; 42. Negative ion; 43. Neutral particle; 50. Ionization region; 60. Migration region; 100. Housing; 200. Imaging assembly; 210. First Fresnel lens; 220. Heat-insulating transparent body; 230. Display panel; 240. Second Fresnel lens; 250. Reflector; 300. Light source assembly; 400. Lens assembly; 500. Ion blower; 510. Blower housing; 511. Port; 512. First air outlet; 513. Air guide part; 520. First electrode assembly; 521. First electrode plate; 522. First electrode pin; 523. Ventilation hole; 530. Second electrode assembly; 531. Second electrode plate; 532. Second electrode pin; 533. Second air outlet; 540. Conducting wire; 600. First radiator; 700. Second radiator; 800. External blower; 900. Speaker; F. Air flow direction. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0048] In addition, the present application may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0049] It should be noted that the orientation terms "upper, lower, front, back (rear), horizontal, vertical" in this disclosure are relative concepts, not absolute concepts, unless otherwise specified. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0050] For the sake of convenience and brevity of narration, the present application takes the normal working position of the projection device as a reference benchmark. The side of the projection device facing the projection image (such as a projection screen) is called the front side or the front; the rear side or the back is the side of the projection device facing away from the projection image, and the left and right sides are the lateral sides perpendicular to the front and rear sides. The upper and lower sides are the directions perpendicular to the front and rear sides and the left and right sides. Taking Figure 2 as an example, the light source assembly 300 is located on the lower side of the imaging assembly 200, the lens assembly 400 is located on the front side of the projection device, and the first radiator 600 is located on the rear side of the projection device. Taking Figure 11For example, the first heat sink 600 is located on the upper side of the projection device, the ion fan 500 is located on the lower side of the projection device, and the light source assembly 300, the second heat sink 700 and the external fan 800 are located on the left side of the projection device.

[0051] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0052] In the related art, the projection equipment uses axial flow fans, centrifugal fans and other fans to form convection wind to dissipate heat for the projection equipment. However, such fans not only occupy a large space and have a low wind speed, but also have a poor heat dissipation effect on the imaging component, resulting in uneven temperature of the imaging component, which easily causes the risk of abnormal display of the imaging component.

[0053] The projection equipment of the related technology uses centrifugal fans or axial fans and radiators to dissipate heat. For example, when an open projection device uses the rotation of the fan to drive the air flow, the dust carried by the air will enter the cavity of the projection device, causing dust to adhere to structures such as the imaging component, which will seriously affect the projection quality of the projection device; at the same time, dust attached to the light source component is also likely to cause a short circuit defect in the projection device, so dust prevention is also a very important consideration for the projection device. Therefore, the projection device can adopt a closed design, and the optical device and other structures are sealed by the shell. On the one hand, it can ensure the optical characteristics of the imaging component while also having a dust-proof function; on the other hand, the closed projection device uses a fan to form convection in the projection device, and the convection air is used to exchange heat with the radiator, thereby realizing the heat transfer of the projection device to the external environment. This heat dissipation method has certain design drawbacks. Due to the structural design limitations of the centrifugal fan, the wind speed blown by the centrifugal fan is not evenly distributed. There are strong wind areas and weak wind areas inside the projection device, and the heat dissipation efficiency of structures such as imaging components is uneven, resulting in uneven temperature distribution of imaging components, which can easily cause display abnormalities such as new blue pictures and white pictures in the imaging components, seriously affecting the projection effect of the projection device. In addition, the principle of the fan is to use the rotation of the fan blades to cut the air to promote air movement, so the fan will bring noise sources such as aerodynamic noise, electromagnetic noise, acoustic and magnetic noise, and mechanical noise, and these noise sources are inevitable, which seriously affects the user experience of the projection device.

[0054] In order to solve the technical problem that the temperature of the imaging component of the projection device is uneven and causes abnormal display of the image, the embodiment of the present disclosure provides a projection device, such as Figures 2 to 16As shown in the figure, the projection device includes: a housing 100, the housing 100 has a first opening, and the housing 100 and the first opening together form a cavity; an imaging component 200, the imaging component 200 is disposed in the cavity; a light source component 300, the light source component 300 is disposed in the cavity; a lens component 400, the lens component 400 is disposed at the first opening; and, an ion blower 500, the ion blower 500 is connected to the housing 100, and the ion blower 500 is provided with a first air outlet 512, and the first air outlet 512 faces the imaging component 200.

[0055] In the projection device according to some embodiments of the present disclosure, the ion blower 500 is connected to the housing 100, and at the same time, the first air outlet 512 of the ion blower 500 faces the imaging component 200. The ion blower 500 causes air to flow to form forced convection, and an internal circulation air duct is formed in the cavity of the projection device for dissipating heat from structures such as the imaging component 200 in the cavity. On the one hand, the ion blower 500 has a small volume and occupies a small space, which can save the cavity space of the projection device for arranging other structural parts, or reduce the overall volume of the projection device; on the other hand, the ion blower 500 is a device that generates air flow using ion technology, without the pneumatic noise and mechanical noise generated by the rotation of the fan blades, which can reduce the noise of the projection device and has a silent effect. Moreover, the air volume of the ion blower 500 can be adjusted by voltage, and a larger air volume can be obtained by adjusting the voltage, thereby improving the heat dissipation effect on the imaging component 200 and the like, reducing the temperature of the imaging component 200 and making the temperature more uniform, and to a certain extent, solving the defect of abnormal display images caused by uneven temperature of the imaging component 200; in addition, the ion blower 500 has the functions of eliminating static electricity and dust removal, which can eliminate the static electricity generated in the cavity and adsorb the dust in the cavity, avoiding the accumulation of dust on the imaging component 200 and affecting the projection effect of the projection device, and at the same time, also being able to avoid the influence of dust accumulation on the heat dissipation effect or short-circuit defect of the projection device.

[0056] In the projection device according to some embodiments of the present disclosure, such as Figure 1As shown, the ion blower 500 is a device that uses "ion wind" to generate air flow. Based on the principle of positive and negative electron neutralization, a voltage is applied to the discharge electrode 20 through the power supply 30. Through the corona discharge of the discharge electrode 20, an ionization region 50 is formed around the discharge electrode 20, and a migration region 60 is formed between the ionization region 50 and the collector electrode 10. A high-voltage electric field is generated around the discharge electrode 20 to ionize the surrounding neutral particles 43 (gases) to generate negative ions and positive ions. The negative ions move towards the discharge electrode 20, and the positive ions fly towards the collector electrode 10 opposite to the discharge electrode 20, forming an "ion wind". Under the high-speed flow of the "ion wind", the surrounding air is driven and flows from the discharge electrode 20 towards the collector electrode 10 to form a stable air flow. The ion blower 500 generates a stable air flow through the discharge electrode 20 and the collector electrode 10. Compared with fan structures such as centrifugal fans, the structure is simpler, more compact, occupies less space, and can have higher efficiency under the same volume. The ion blower 500 does not require mechanical structure movement while generating air flow, operates quietly and stably, and can achieve silent heat dissipation. The "ion wind" and air flow generated by the ion blower 500 are positively correlated with the voltage applied to the discharge electrode 20. Therefore, the size of the "ion wind" and air flow generated by the ion blower 500 can be adjusted by adjusting the magnitude of the voltage applied to the discharge electrode 20. The air volume generated by the ion blower 500 is not limited by its own volume. Under the same volume as fans such as centrifugal fans, the ion blower 500 can generate a larger air volume, and the air volume adjustment range of the ion blower 500 is also larger. Thus, the ion blower 500 can provide a more suitable air volume as needed, while ensuring the heat dissipation of the projection device and also improving the energy consumption of the centrifugal fan. The positive ions 41 and negative ions 42 generated by the ion blower 500 can neutralize the static electricity in the cavity, playing a role in eliminating and preventing static electricity. At the same time, the positive ions 41 and negative ions 42 can also combine with dust, thereby eliminating the dust in the cavity and preventing the dust from adhering to optical devices such as the imaging component 200, affecting the projection effect of the projection device.

[0057] In the projection device according to some embodiments of the present disclosure, as Figure 2 、 Figures 9 to 11 shown, the ion blower 500 can be connected to the housing 100 by means of plugging, clamping, connecting members, etc.; optionally, after the ion blower 500 is connected to the housing 100 by means of plugging, clamping, etc., connecting members such as screws can also be used to fix the ion blower 500 and the housing 100. After the ion blower 500 is connected to the housing 100, the ion blower 500 can be located inside the cavity or outside the cavity, as long as it is ensured that the air flow generated by the ion blower 500 can blow towards the imaging component 200 through the first air outlet 512. For example, in as Figure 2In the illustrated embodiment, the imaging component 200 is horizontally disposed in the cavity, and the ion blower 500 is disposed at the rear side of the projection device. The blower housing 510 is connected to the rear side of the housing 100 so that the first air outlet 512 corresponds to the imaging component 200, thereby enabling the ion blower 500 to provide an air flow to the imaging component 200 from the rear side of the projection device to dissipate heat from the imaging component 200. For another example, in the embodiment as Figure 11 shown, the imaging component 200 is vertically disposed in the cavity, and the ion blower 500 is disposed at the lower side of the projection device. The blower housing 510 is connected to the lower side of the housing 100 so that the first air outlet 512 corresponds to the imaging component 200, thereby enabling the ion blower 500 to provide an air flow to the imaging component 200 from the lower side of the projection device to dissipate heat from the imaging component 200.

[0058] In the related art, taking the solution of using a centrifugal fan to generate an air flow in a projection device as an example, during the installation process of the centrifugal fan, first, the motor and the fan blade of the centrifugal fan need to be fixed to the housing, and then the air guide cover and other structures of the centrifugal fan are fixed to the housing. The centrifugal fan has a relatively large number of components and complex installation. In addition, when the centrifugal fan is installed at the lower side of the projection device, an air inlet gap needs to be reserved below the centrifugal fan, resulting in a relatively large occupied space of the projection device; when a bottom cover is provided at the bottom of the projection device and the centrifugal fan is installed between the housing and the bottom cover, an assembly gap and an air inlet gap need to be reserved between the centrifugal fan and the bottom cover, resulting in a further increase in the occupied space of the projection device.

[0059] In the projection device according to some embodiments of the present disclosure, adopting the solution of using the ion blower 500 to generate an air flow, the installation of the ion blower 500 can be simpler. During installation, the blower housing 510 of the ion blower 500 can be directly connected to the housing 100.

[0060] In the projection device according to some embodiments of the present disclosure, as Figure 2 、 Figures 9 to 11 shown, the projection device can be a vertical projection device or a horizontal projection device, and the projection device can be a closed projection device or an open projection device.

[0061] In the projection device according to some embodiments of the present disclosure, as Figure 2 and Figure 11 shown, the imaging component 200 includes a display panel 230, and the display panel 230 can be a liquid crystal display (LCD). The display panel 230 can be detachably disposed in the cavity through structures such as a fixing frame, or can be detachably disposed in the cavity through structures such as a card slot inside the housing 100.

[0062] In the projection device according to some embodiments of the present disclosure, as Figure 2 andFigure 11 As shown, the imaging component 200 further includes a first Fresnel lens 210 and a second Fresnel lens 240, and the first Fresnel lens 210 and the second Fresnel lens 240 are respectively located on both sides of the display panel 230. The first Fresnel lens 210 is located on the side of the display panel 230 adjacent to the light source component 300, and is used to adjust the light beam emitted by the light source component 300 into parallel light, so as to increase the brightness around the display panel 230, eliminate the solar photovoltaic effect, and thus improve the uniformity of the display brightness. The second Fresnel lens 240 is located on the side of the display panel 230 away from the light source component 300, and is used to focus the light beam emitted by the display panel 230 into the lens component 400, so as to improve the clarity of the displayed image. Optionally, the first Fresnel lens 210 and the second Fresnel lens 240 can be detachably arranged in the cavity through structures such as a fixing frame, or can be detachably arranged in the cavity through structures such as a card slot on the inner side of the housing 100.

[0063] In the projection device according to some embodiments of the present disclosure, as Figure 2 and Figure 11 shown, the imaging component 200 further includes a heat-insulating transparent body 220, and the heat-insulating transparent body 220 is arranged between the display panel 230 and the light source component 300, and is used to insulate the display panel 230 from the light source component 300, and prevent the heat generated by the light source component 300 from entering the area where the display panel 230 is located, so as to prevent the display panel 230 from overheating. The heat-insulating transparent body 220 can be flat glass, and when the light passes through the heat-insulating transparent body 220, it can maintain the original path and will not converge or diverge. Optionally, the heat-insulating transparent body 220 can be detachably arranged in the cavity through structures such as a fixing frame, or can be detachably arranged in the cavity through structures such as a card slot on the inner side of the housing 100.

[0064] In the projection device according to some embodiments of the present disclosure, as Figure 2 and Figure 11As shown, in the imaging component 200, the first Fresnel lens 210, the heat-insulating transparent body 220, the display panel 230, and the second Fresnel lens 240 are sequentially arranged at intervals in the cavity. A certain flow channel is formed between the first Fresnel lens 210 and the heat-insulating transparent body 220, between the heat-insulating transparent body 220 and the display panel 230, and between the display panel 230 and the second Fresnel lens 240 for the air flow to pass through. The first air outlet 512 of the ion blower 500 faces the imaging component 200, so that the air flow generated by the ion blower 500 can pass through the flow channel between the first Fresnel lens 210 and the heat-insulating transparent body 220, the flow channel between the heat-insulating transparent body 220 and the display panel 230 to exchange heat with the display panel 230 once. After that, the air flow passes through the flow channel between the display panel 230 and the second Fresnel lens 240 to exchange heat with the display panel 230 twice. The hot air flow that has fully exchanged heat with the display panel 230 circulates back to the ion blower 500 in the cavity.

[0065] In the projection device according to some embodiments of the present disclosure, optionally, as Figure 2 and Figure 11 shown, the housing 100 may be provided with a first radiator 600 at a position corresponding to the circulation path of the air flow in the cavity. The first radiator 600 is used to exchange heat with the circulating air flow generated by the ion blower 500, that is, to dissipate heat from the air flow in the cavity, so that the heat generated by the optical devices such as the imaging component 200 in the cavity is transferred to the first radiator 600 through the air flow, and then heat dissipation is achieved through the first radiator 600. Optionally, as Figure 2 and Figure 11 shown, the first radiator 600 is located on the path where the air flow exchanges heat and returns to the ion blower 500. Optionally, a plurality of heat dissipation fins may be provided on the side of the first radiator 600 away from the cavity, and heat exchange is performed with the cold air outside the housing 100 through the heat dissipation fins to transfer the heat inside the housing 100 to the environment outside the housing 100. Optionally, the first radiator 600 may be a cast aluminum radiator.

[0066] In the projection device according to some embodiments of the present disclosure, optionally, as Figure 2 and Figure 11 shown, some air guiding structures may be provided inside the housing 100 to adjust the flow direction of the air flow in the cavity, so that the air flow generated by the ion blower 500 can flow in the cavity according to the designed path.

[0067] In the projection device according to some embodiments of the present disclosure, optionally, as Figure 2 and Figure 11As shown, a first opening communicating with the cavity is provided on the front side of the housing 100. The lens assembly 400 is disposed at the first opening and is hermetically connected to the housing 100 so that the cavity is in a sealed state at the first opening. Optionally, an airtight sealing filler is provided between the first opening and the lens assembly 400, so that the cavity maintains good sealing performance, which can prevent dust from entering the cavity and keep the optical devices in the cavity clean.

[0068] In the projection device according to some embodiments of the present disclosure, optionally, as Figure 2 and Figure 11 shown, the light source assembly 300 is disposed in the cavity. The light generated by the light source assembly 300 is incident on the imaging assembly 200. The imaging assembly 200 can generate an image under the light of the light source assembly 300 and project the generated image into the lens assembly 400. Optionally, the light source assembly 300 may include a light source and a light cup, and the light cup is used to condense the light emitted by the light source to improve the light efficiency.

[0069] In the projection device according to some embodiments of the present disclosure, optionally, as Figure 2 and Figure 11 shown, when the light emitted from the imaging assembly 200 cannot be directly incident on the lens assembly 400, a reflector 250 may be provided on the housing 100, so that the angle of the light emitted from the imaging assembly 200 can be adjusted by the reflector 250, so that the emitted light can be incident on the lens assembly 400.

[0070] In the projection device according to some embodiments of the present disclosure, optionally, as Figure 2 and Figure 11 shown, a second opening may be provided at a position of the housing 100 corresponding to the light source assembly 300. A heat conducting plate may be provided at the second opening. The heat conducting plate is connected to the second radiator 700 through a heat pipe, so that the light source assembly 300 can be cooled by the second radiator 700. Optionally, an airtight sealing filler such as a gasket is provided between the second opening and the light source assembly 300, so that the cavity maintains good sealing performance at the second opening, which can prevent dust from entering the cavity and keep the optical devices in the cavity clean. Optionally, an external blower 800 may be provided at the second radiator 700 to drive the air flow at the second radiator 700, thereby improving the heat exchange efficiency of the second radiator 700. Optionally, the second blower may be an axial flow blower, a centrifugal blower, an ion blower 500, a piezoelectric blower, etc. with appropriate structure. Optionally, the second radiator 700 may be a cast aluminum radiator, and the second radiator 700 may be provided with radiator fins.

[0071] In the projection device according to some embodiments of the present disclosure, optionally, as Figure 2 and Figure 11As shown, the external fan 800 is disposed outside the housing 100. The external fan 800 can be fixed to the outside of the housing 100 or fixed by the second radiator 700, so that both the second radiator 700 and the external fan 800 are located outside the housing 100. The external fan 800 is used to form an external air duct outside the housing 100, so that the external air duct passes through the second radiator 700, increasing the air flow velocity at the second radiator 700, thereby improving the heat dissipation efficiency of the second radiator 700.

[0072] In the projection device according to some embodiments of the present disclosure, optionally, as Figure 2 and Figure 11 shown, a speaker 900 may be provided outside the housing 100, and audio corresponding to the projected image of the projection device is played through the speaker 900, or independent audio may also be played through the speaker 900.

[0073] As an alternative embodiment, as Figures 2 to 16 shown, the ion fan 500 includes a fan housing 510, a first electrode assembly 520, and a second electrode assembly 530 having a polarity opposite to that of the first electrode assembly 520; wherein, the fan housing 510 has a port 511 and a first air outlet 512, and the fan housing 510 together with the port 511 and the first air outlet 512 forms a fan cavity; the first electrode assembly 520 is disposed in the fan cavity; the second electrode assembly 530 is disposed opposite to the first electrode assembly 520 at the port 511, and the second electrode assembly 530 is provided with a second air outlet 533.

[0074] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, the fan housing 510 can support the first electrode assembly 520 and the second electrode assembly 530, so that the first electrode assembly 520 and the second electrode assembly 530 can be disposed opposite to each other, so that the first electrode assembly 520 and the second electrode assembly 530 can respectively serve as the discharge electrode 20 and the collector electrode 10. After being energized, "ion wind" and air flow can be generated in the fan cavity, and the air flow can enter and exit the fan cavity through the first air outlet 512.

[0075] In the projection device according to some embodiments of the present disclosure, as Figures 2 to 16 shown, the second electrode assembly 530 is disposed at the port 511 of the fan housing 510. A second air outlet 533 can be provided on the second electrode assembly 530, so that the fan cavity remains unobstructed at the port 511, and the air flow can enter and exit the fan cavity through the second air outlet 533. Optionally, the second air outlet 533 can be strip-shaped. Optionally, a plurality of second air outlets 533 can be provided on the second electrode assembly 530 to ensure the ventilation area of the fan housing 510 at the port 511.

[0076] In the related art, since the centrifugal fan is based on the principle of mechanical rotation for air outlet, the air inlet and air outlet of the centrifugal fan are smaller than the size of the upper cover of the centrifugal fan and smaller than the size of the fan blades. Therefore, the air inlet and air outlet of the centrifugal fan are relatively small. Generally, the air inlet area / air outlet area of the centrifugal fan is only 40% - 60% of the fan area, resulting in poor uniformity of air inlet and air outlet of the centrifugal fan. The air inlet and air outlet of the vortex fan are similar to those of the centrifugal fan and are also relatively small.

[0077] In the projection device according to some embodiments of the present disclosure, such as Figures 2 to 16 shown, the first air outlet 512 and the second air outlet 533 (port 511) of the ion blower 500 are not restricted by the structures of the first electrode assembly 520 and the second electrode assembly 530. The first air outlet 512 and the second air outlet 533 (port 511) can be arranged on the entire surface of the blower housing 510. When the first air outlet 512 and the second air outlet 533 are used as the air outlet and the air inlet respectively, the sizes can be relatively large, covering 100% of the air outlet surface and also covering 100% of the air inlet surface. Thus, the air outlet of the ion blower 500 can be made more uniform, the air resistance of the air inlet is smaller, and thus a larger air volume can be brought by the ion blower 500, with higher efficiency.

[0078] Optionally, as Figures 2 to 16 shown, the first electrode assembly 520 can be used as the collector 10, and the second electrode assembly 530 can be used as the discharge electrode 20. At the same time, the second electrode assembly 530 is provided with a wire 540 to be connected to the power supply 30. After being powered on, the second electrode assembly 530 discharges, and the air flow generated in the blower cavity flows from the second electrode assembly 530 towards the first electrode assembly 520. The air flow can pass through the first air outlet 512 as the air outlet vertically towards the imaging assembly 200. The air flow direction F in the cavity is as Figure 2 and Figure 11 shown by the arrows. After exchanging heat with the imaging assembly 200, it can circulate to the first radiator 600, fully contact the first radiator 600 for heat dissipation, and then circulate to the second air outlet 533. Through the second air outlet 533 as the air inlet, it returns to the blower cavity, realizing the internal circulation of the air flow in the cavity. During the internal circulation of the air flow, the heat of the imaging assembly 200 can be transferred to the first radiator 600.

[0079] Optionally, the first electrode assembly 520 can serve as the discharge electrode 20. Meanwhile, the first electrode assembly 520 is provided with a wire 540 for connection to the power supply 30. The second electrode assembly 530 can serve as the collector 10. After being powered on, the first electrode assembly 520 discharges, and the airflow generated in the blower cavity flows from the first electrode assembly 520 towards the second electrode assembly 530. The airflow can pass through the second air outlet 533 as the air outlet vertically to the cavity. After being cooled by the first radiator 600 in the cavity, it circulates to the imaging assembly 200. After exchanging heat with the imaging assembly 200, it circulates to the first air inlet 512 and returns to the blower cavity through the first air inlet 512 as the air inlet, realizing the internal circulation of the airflow in the cavity. During the internal circulation process, the airflow can transfer the cold box of the first radiator 600 to the imaging assembly 200 and transfer the heat of the imaging assembly 200 to the first radiator 600.

[0080] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, the blower housing 510 serves as the base of the ion blower 500, which can not only provide a supporting role for the assembly of the first electrode assembly 520 and the second electrode assembly 530, but also provide a guiding role for the airflow generated by the first electrode assembly 520 and the second electrode assembly 530, so that the airflow flows directionally to the imaging assembly 200.

[0081] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, the blower housing 510 can be provided with mounting grooves for mounting the first electrode assembly 520 and / or the second electrode assembly 530. The first electrode assembly 520 and / or the second electrode assembly 530 are mounted in the blower housing 510 through the mounting grooves, thereby forming the ion blower 500 with the blower housing 510. After the ion blower 500 is assembled, the ion blower 500 can be connected to the housing 100 of the projection device through the blower housing 510, that is, the blower housing 510 is connected and fixed to the housing 100 by means of buckles, locking ears, etc., and the installation of the ion blower 500 in the projection device can be completed. Therefore, the installation of the ion blower 500 is simpler and more convenient.

[0082] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, during the assembly of the ion blower 500, the first electrode assembly 520 can be first installed in the blower cavity, and then the second electrode assembly 530 can be installed at the port 511, so that the ion blower 500 forms a complete whole.

[0083] As an alternative implementation, as Figures 2 to 16 shown, both the first electrode assembly 520 and the second electrode assembly 530 are plate-shaped.

[0084] In the projection device according to some embodiments of the present disclosure, optionally, asFigures 2 to 16 As shown, both the first electrode assembly 520 and the second electrode assembly 530 are plate-shaped, and the first electrode assembly 520 and the second electrode assembly 530 are arranged opposite to each other. Therefore, the corresponding areas of the first electrode assembly 520 and the second electrode assembly 530 are larger, so that a larger ionization region 50 and migration region 60 can be formed, generating a larger "ion wind" and air flow. As a result, the air volume generated by the ion blower is larger, the wind speed is faster, and the air outlet of the first air outlet 512 is more uniform. Thus, the area of the air flow passing through the imaging assembly 200 in the cavity is larger, and the heat dissipation effect on optical devices such as the imaging assembly 200 is better, which can, to a certain extent, avoid the defect of abnormal display images caused by uneven temperature of the imaging assembly 200.

[0085] As an alternative embodiment, as Figures 2 to 16 shown, the second electrode assembly 530 includes a second electrode plate 531 and a plurality of second electrode pins 532 disposed on the second electrode plate 531, and the second air outlet 533 is disposed on the second electrode plate 531; the first electrode assembly 520 includes a first electrode plate 521 and first electrode pins 522 disposed on the first electrode plate 521 corresponding to the second electrode pins 532 one by one.

[0086] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, the second electrode assembly 530 includes a second electrode plate 531 and a plurality of second electrode pins 532 disposed on the second electrode plate 531, and the plurality of second electrode pins 532 can be arranged in an array on the second electrode plate 531; at the same time, the first electrode assembly 520 includes a first electrode plate 521 and a plurality of first electrode pins 522 disposed on the first electrode plate 521, and the plurality of first electrode pins 522 can be arranged in an array on the first electrode plate 521, and the plurality of first electrode pins 522 and the second electrode pins 532 correspond to each other one by one. The first electrode pins 522 and the second electrode pins 532 corresponding to each other form a set of electrode pairs, and the first electrode pins 522 and the second electrode pins 532 serve as the discharge electrode 20 and the collector electrode 10 respectively. The number of electrode pairs in the ion blower 500 determines the ability of the ion blower 500 to generate "ion wind" and air flow. The more the number of electrode pairs, the larger the flow rate of the "ion wind" and air flow generated. Therefore, the ability of the ion blower 500 to generate "ion wind" and air flow is positively correlated with its own area, that is, positively correlated with the areas of the first electrode plate 521 and the second electrode plate 531. The larger the areas of the first electrode plate 521 and the second electrode plate 531, the more the number of the first electrode pins 522 and the second electrode pins 532 disposed thereon, and the greater the ability of the ion blower 500 to generate "ion wind" and air flow.

[0087] In the projection device according to some embodiments of the present disclosure, as Figures 2 to 16As shown, the second electrode assembly 530 is disposed at the port 511 of the blower housing 510. A second air outlet 533 is provided on the second electrode assembly 530. The second air outlet 533 may be formed on the second electrode plate 531 and located between the second electrode pins 532. Optionally, the second electrode pins 532 may be arranged in an array on the second electrode plate 531, and the second air outlet 533 may be formed in the gap between the second electrode pins 532. The second air outlet 533 may be in the shape of a long strip, a circle, a triangle, or the like.

[0088] In the projection device according to some embodiments of the present disclosure, optionally, when the first electrode assembly 520 serves as the discharge electrode 20, the first electrode plate 521 may be a conductive metal plate or an insulating plate provided with a conductive circuit. At the same time, the conductive metal plate or the conductive circuit is electrically connected to the wire 540, and the first electrode pin 522 is disposed on the conductive metal plate or on the conductive circuit on the insulating plate, so that the wire 540 can be used to connect to the power supply 30. Optionally, as Figures 2 to 16 shown, when the second electrode assembly 530 serves as the discharge electrode 20, the second electrode plate 531 may be a conductive metal plate or an insulating plate provided with a conductive circuit. At the same time, the conductive metal plate or the conductive circuit is electrically connected to the wire 540, and the second electrode pin 532 is disposed on the conductive metal plate or on the conductive circuit on the insulating plate, so that the wire 540 can be used to connect to the power supply 30.

[0089] As an alternative embodiment, as Figures 2 to 16 shown, the first electrode pin 522 is any one of a cone shape, a column shape, a plate shape, a filament shape, a mesh shape, and a ring shape; the second electrode pin 532 is any one of a cone shape, a column shape, a plate shape, a filament shape, a mesh shape, and a ring shape.

[0090] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, the first electrode pin 522 is any one of a cone shape, a column shape, a plate shape, a filament shape, a mesh shape, and a ring shape; the second electrode pin 532 is any one of a cone shape, a column shape, a plate shape, a filament shape, a mesh shape, and a ring shape. The shapes of the first electrode pin 522 and the second electrode pin 532 can be adaptively selected and adjusted according to the design requirements of the ion blower 500.

[0091] It should be noted that when the first electrode pin 522 serves as the discharge electrode 20, the shape of the first electrode pin 522 needs to have a tip to ensure the discharge effect of the first electrode pin 522; similarly, when the second electrode pin 532 serves as the discharge electrode 20, the shape of the second electrode pin 532 needs to have a tip to ensure the discharge effect of the second electrode pin 532.

[0092] For example, in Figures 2 to 16In the illustrated embodiment, the second electrode assembly 530 serves as the discharge electrode 20, and the second electrode pins 532 on the second electrode plate 531 are conical. In Figures 2 to 10 the illustrated embodiment, the first electrode assembly 520 serves as the collector 10. The first electrode plate 521 can be a conductive metal plate, and then the first electrode pins 522 can be integrated with the conductive metal plate. That is, positive ions 41 can be adsorbed through the conductive metal plate. Meanwhile, through holes are formed in the conductive metal plate for air flow to pass through. Then, the first electrode plate 521 can be a conductive metal plate provided with a plurality of ventilation holes 523. In Figures 11 to 16 the illustrated embodiment, the first electrode assembly 520 serves as the collector 10. The first electrode plate 521 can be an insulating plate. For example, the first electrode plate 521 and the blower housing 510 can be of an integral structure and are both made of insulating materials such as plastics. Then, the first electrode pins 522 can be annular conductive metal rings, and the conductive metal rings are arranged on the first electrode plate 521 in one-to-one correspondence with the first electrode pins 522.

[0093] As an alternative embodiment, as Figures 11 to 16 shown, a first air outlet 512 is formed in the first housing portion of the blower housing 510 corresponding to the first electrode assembly 520 and the second electrode assembly 530.

[0094] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 11 to 16 shown, the first air outlet 512 is arranged at a position on the blower housing 510 between the first electrode assembly 520 and the second electrode assembly 530. Then, the air flow generated by the first electrode assembly 520 and the second electrode assembly 530 can directly pass through the first air outlet 512 as an air outlet and blow towards the imaging assembly 200.

[0095] In the projection device according to some embodiments of the present disclosure, the imaging assembly 200 can be vertically arranged in the cavity. Then, the ion blower 500 can be arranged on the upper side or the lower side of the housing 100 so that the first air outlet 512 of the ion blower 500 corresponds to the imaging assembly 200, and at the same time, the second air outlet 533 communicates with the cavity. Optionally, as Figures 11 to 16 shown, the ion blower 500 can be arranged at the bottom of the projection device. The air flow generated by the ion blower 500 is blown upward through the first air outlet 512 to enter the gap in the imaging assembly 200 from the lower side of the imaging assembly 200, so that heat exchange can occur with the display panel 230 in the imaging assembly 200. After the air flow exchanges heat with the imaging assembly 200, it can circulate and dissipate heat in the cavity, and then return to the blower cavity through the second air outlet 533.

[0096] As an alternative embodiment, as Figures 11 to 16 shown, the first electrode plate 521 and the blower housing 510 are of an integral structure.

[0097] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 11 to 16 shown, the first electrode plate 521 and the blower housing 510 are of an integral structure, and the first electrode pins 522 can be directly arranged on the blower housing 510, which can reduce one structural component of the ion blower 500, thereby reducing the cost and assembly cost of the ion blower 500. For example, the first electrode pins 522 can be conductive metal rings in a ring shape, and the conductive metal rings are arranged on the blower housing 510 in one-to-one correspondence with the first electrode pins 522; at the same time, the second electrode assembly 530 can be covered at the port 511 of the blower housing 510, and the side of the second electrode assembly 530 adjacent to the first electrode pins 522 can be provided with second electrode pins 532 corresponding to the first electrode pins 522 one by one, so as to form a group of electrode pairs.

[0098] In the projection device according to some embodiments of the present disclosure, as Figures 11 to 16 shown, the ion blower 500 includes a blower housing 510, a first electrode assembly 520, and a second electrode assembly 530. Among them, the blower housing 510 has a port 511 and a bottom opposite to the port 511. The port 511 of the blower housing 510 can be provided with a buckle and a locking ear. The port 511 of the blower housing 510 can be buckled on the lower side of the housing 100 and connected to the housing 100 through the buckle, and fixed to the housing 100 through a connecting member such as a screw passing through the locking ear. At the same time, an opening is provided at the corresponding part of the housing 100 to the port 511, so that the blower cavity can communicate with the cavity inside the housing 100; after the blower housing 510 is connected to the housing 100, the ion blower 500 can be located on the lower side of the projection device, and the blower housing 510 and the housing 100 can be hermetically connected to keep the cavity of the projection device closed. The first electrode assembly 520 includes a first electrode plate 521 and first electrode pins 522. The first electrode plate 521 and the bottom of the blower housing 510 are of a first structure, and the first electrode pins 522 are conductive metal rings, and the conductive metal rings are arranged on the bottom of the blower housing 510. The second electrode assembly 530 includes a second electrode plate 531 and second electrode pins 532. The second electrode plate 531 is covered on the port 511 of the blower housing 510. At the same time, a second air outlet 533 is opened on the second electrode plate 531 as the air inlet of the ion blower 500. The second electrode pins 532 are conical conductive metal pins, and the conical conductive metal pins are arranged on the side of the second electrode plate 531 adjacent to the conductive metal ring, so that the conical conductive metal pins and the conductive metal rings form electrode pairs one by one. Optionally, as Figure 11 shown, a first radiator 600 can be provided at the housing 100 on the upper side of the projection device, so that the air flow can be dissipated through the first radiator 600; optionally, the blower housing 510 can have a heat dissipation structure, so that the air flow can be dissipated through the blower housing 510.

[0099] As Figure 11As shown, the ion blower 500 is installed on the lower side of the projection device, and the air flow direction F is as Figure 11 shown by the arrow in the figure. The air flow generated by the ion blower 500 enters the cavity through the first air inlet 512, exchanges heat with the imaging component 200 through the imaging component 200, and then the air flow passes through the first radiator 600 of the projection device, dissipates heat through the first radiator 600, and then returns to the blower housing 510 through the second air outlet 533. The air flow in the blower housing 510 can also dissipate heat through the conductive metal ring serving as the first electrode pin 522; while the blower housing 510 has a heat dissipation function, the air flow can also dissipate heat through the blower housing 510. Since the second air outlet 533 faces the inside of the cavity, there is no need to reserve an air inlet gap under the ion blower 500, which can make the space occupied by the ion blower 500 smaller, thereby reducing the overall volume of the projection device.

[0100] As an alternative embodiment, as Figures 2 to 10 shown, a first air inlet 512 is provided in the second housing part of the blower housing 510 corresponding to the side of the first electrode assembly 520 away from the second electrode group, and ventilation holes 523 are provided in the first electrode plate 521.

[0101] In the projection device of some embodiments of the present disclosure, optionally, as Figures 2 to 10 shown, the first air inlet 512 is located on the side of the first electrode assembly 520 away from the second electrode assembly 530. In order to enable the air flow generated between the first electrode assembly 520 and the second electrode assembly 530 to pass through the first air inlet 512, ventilation holes 523 can be provided in the first electrode plate 521 so that the air flow enters the first air inlet 512 through the ventilation holes 523, and then enters the cavity in the housing 100 through the first air inlet 512 and passes through the imaging component 200 to exchange heat with the imaging component 200.

[0102] In the projection device of some embodiments of the present disclosure, optionally, as Figures 2 to 10 shown, the ventilation openings can be in shapes such as circular, oval, rectangular, and triangular.

[0103] As an alternative embodiment, as Figures 2 to 10 shown, the ventilation holes 523 and the first electrode pins 522 are provided on the first electrode plate 521 in a one-to-one correspondence.

[0104] In the projection device of some embodiments of the present disclosure, optionally, as Figures 2 to 10As shown, the first electrode pins 522 and the second electrode pins 532 form electrode pairs one by one, generating an "ion wind" and an air flow between the electrode pairs. In order to enable the air flow to pass through the first air outlet 512 faster and more evenly, ventilation holes 523 opened on the first electrode plate 521 can correspond to the first electrode pins 522 one by one, so that the first electrode pins 522 and the second electrode pins 532 can form electrode pairs correspondingly. The air flow generated by the electrode pairs enters the first air outlet 512 through the ventilation holes 523 at the corresponding positions, and then enters the imaging assembly 200 evenly through the first air outlet 512.

[0105] In the projection device according to some embodiments of the present disclosure, as Figures 2 to 10 shown, the ion blower 500 includes a blower housing 510, a first electrode assembly 520, and a second electrode assembly 530. Among them, the blower housing 510 has a port 511 and a bottom opposite to the port 511. At the port 511 of the blower housing 510, a buckle and a locking ear can be provided. The port 511 of the blower housing 510 can be buckled on the rear side of the housing 100 and connected to the housing 100 through the buckle, and fixed to the housing 100 by passing a connecting member such as a screw through the locking ear. At the same time, an opening is provided at the corresponding part of the housing 100 to the port 511 so that the blower cavity can communicate with the cavity inside the housing 100; after the blower housing 510 is connected to the housing 100, the ion blower 500 can be located at the rear side of the projection device, and the blower housing 510 and the housing 100 can be hermetically connected to keep the cavity of the projection device closed. The first electrode assembly 520 includes a first electrode plate 521 and first electrode pins 522. The first electrode plate 521 is arranged in the blower cavity. The first electrode plate 521 can be a conductive metal plate, and the first electrode pins 522 are integrated with the first electrode plate 521, so that the first electrode plate 521 is a conductive metal perforated plate. The second electrode assembly 530 includes a second electrode plate 531 and second electrode pins 532. The second electrode plate 531 covers the port 511 of the blower housing 510. At the same time, a second air outlet 533 is opened on the second electrode plate 531 as the air inlet of the ion blower 500. The second electrode pins 532 are conical conductive metal pins, and the conical conductive metal pins are arranged on one side of the second electrode plate 531 adjacent to the conductive metal perforated plate, so that the conical conductive metal pins and the conductive metal perforated plate form electrode pairs correspondingly. Optionally, as Figure 2 shown, a first radiator 600 can be provided at the housing 100 at the rear side of the projection device so that the air flow can be dissipated through the first radiator 600.

[0106] As Figure 2 shown, the ion blower 500 is installed at the rear side of the projection device, and the air flow direction F is as Figure 2As shown by the arrow, the airflow generated by the ion blower 500 enters the cavity through the first air outlet 512, exchanges heat with the imaging component 200 through the imaging component 200, and then the airflow passes through the first radiator 600 of the projection device, dissipates heat through the first radiator 600, and then returns to the blower housing 510 through the second air outlet 533.

[0107] As an alternative embodiment, as Figures 2 to 16 shown, a wind guiding portion 513 is provided at the blower housing 510 adjacent to the first air outlet 512.

[0108] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, a wind guiding portion 513 is provided at the blower housing 510 adjacent to the first air outlet 512. The wind guiding portion 513 has an arc-shaped plate structure and can guide the airflow generated by the first electrode assembly 520 and the second electrode assembly 530 from the first air outlet 512 to the imaging component 200, so that the airflow can uniformly enter between the display panel 230 and the heat insulating transparent body 220 of the imaging component 200, and between the display panel 230 and the second Fresnel lens 240, improving the uniformity of heat dissipation and temperature reduction of the display panel 230.

[0109] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, by providing the wind guiding portion 513 on the blower housing 510, the airflow can be guided by using the structure of the ion blower 500 itself, so that the guiding structure of the housing 100 can be reduced, the manufacturing difficulty of the housing 100 can be reduced, the cost can be reduced, and it is also convenient for the connection and assembly of the ion blower 500 and the housing 100.

[0110] As an alternative embodiment, as Figures 2 to 16 shown, the blower housing 510 is buckled on the housing 100, and the port 511 and the first air outlet 512 are both communicated with the cavity.

[0111] In the projection device according to some embodiments of the present disclosure, optionally, as Figures 2 to 16 shown, the port 511 and the first air outlet 512 of the blower housing 510 can be used as the outlet and inlet for the airflow to enter the blower cavity respectively. By making the port 511 and the first air outlet 512 both communicate with the cavity, the airflow can circulate in the cavity and the blower cavity to form a circulating airflow, which can reduce the resistance of the airflow circulation and improve the utilization efficiency of the airflow generated by the ion blower 500.

[0112] Based on the same inventive concept, the embodiments of the present disclosure propose a projection system, which includes a projection screen and the above-mentioned optical engine, and the projection screen is used to receive the projection image of the optical engine.

[0113] Since the projection system provided by the present invention includes the projection device of the above technical solution, the projection system provided by the present invention has all the beneficial effects of the above projection device, which will not be elaborated herein.

[0114] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0115] In this application, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0116] In addition, in this application, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "a plurality" means two or more, unless otherwise clearly specifically limited.

[0117] Although the embodiments of this application 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 principle and spirit of this application, and the scope of this application is defined by the claims and their equivalents.

Claims

1. A projection device, characterized in that: The projection device comprises: A shell, wherein the shell has a first opening, and the shell and the first opening together form a cavity; An imaging component, wherein the imaging component is disposed in the cavity; A light source assembly, wherein the light source assembly is disposed in the cavity; a lens assembly, the lens assembly being disposed at the first opening; and An ion blower is connected to the shell and is provided with a first air outlet, and the first air outlet faces the imaging component.

2. The projection device according to claim 1, characterized in that: The ion blower comprises a blower housing, a first electrode assembly and a second electrode assembly having a polarity opposite to that of the first electrode assembly; Wherein, the fan housing has a port and the first air outlet, and the fan housing, the port and the first air outlet together form a fan cavity; The first electrode assembly is disposed in the fan cavity; The second electrode assembly is arranged at the port opposite to the first electrode assembly, and the second electrode assembly is provided with a second air outlet.

3. The projection device according to claim 2, characterized in that: The first electrode assembly and the second electrode assembly are both in a plate shape.

4. The projection device according to claim 2, characterized in that: The second electrode assembly includes a second electrode plate and a plurality of second electrode needles arranged on the second electrode plate, and the second air outlet is arranged on the second electrode plate; The first electrode assembly includes a first electrode plate and first electrode needles disposed on the first electrode plate in a one-to-one correspondence with the second electrode needles.

5. The projection device according to claim 4, characterized in that: The first electrode needle is in any one of a cone, column, plate, wire, mesh and ring shape; the second electrode needle is in any one of a cone, column, plate, wire, mesh and ring shape.

6. The projection device according to claim 5, characterized in that: The first air outlet is formed in the first shell portion of the fan housing corresponding to the first electrode assembly and the second electrode assembly.

7. The projection device according to claim 6, characterized in that: The first electrode plate and the fan casing are an integrated structure.

8. The projection device according to claim 7, characterized in that: The first air outlet is formed on the second shell portion of the fan housing corresponding to a side of the first electrode assembly away from the second electrode group, and a ventilation hole is formed on the first electrode plate.

9. The projection device according to claim 8, characterized in that: The ventilation holes and the first electrode needles are arranged on the first electrode plate in a one-to-one correspondence.

10. The projection device according to any one of claims 2 to 9, characterized in that: The fan housing is provided with an air guide portion adjacent to the first air outlet.

11. The projection device according to claim 10, characterized in that: The fan casing is buckled on the shell, and the port and the first air outlet are both connected to the cavity.

12. A projection system, characterized in that: The projection system comprises a projection screen and a projection device according to any one of claims 1 to 11, wherein the projection screen is used to receive a projection image of the projection device.

Images