Projector closed dust prevention and removal structure

Abstract

The utility model discloses a closed dust prevention and removal structure of a projector. The closed dust prevention and removal structure comprises a filtering structure, an air blowing structure and an exhaust fan, the air blowing structure comprises at least one air blower; the air blowing structure and the exhaust fan are located on the two opposite sides of the LCD light valve light-transmitting window respectively. The blowing structure is aligned with an air inlet of the heat dissipation air duct for blowing; the exhaust fan is aligned with an air outlet of the heat dissipation air duct for exhausting air; the projector housing is provided with an air inlet and an air outlet, and the air inlet and the air outlet of the projector housing are respectively provided with a filtering structure. When the projector removes dust, the rotating speeds of the air blowing structure and the exhaust fan are at the maximum value. Under the action of the air blowing structure and the exhaust fan, dust, impurities and other particles on the LCD light valve can be quickly blown off, and under the action of the filtering structure, air entering the projector shell is filtered and prevented from dust, so that it is guaranteed that the dust, impurities and other particles are extremely few in the projector, and the projector is prevented from being damaged. Effective and normal operation of each device in the projector and output quality of images of the projector are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of projectors, and in particular relates to a confidential closed dust-proof and dust-removing structure for projectors. Background Art

[0002] When the projector is working, it needs to maintain good ventilation inside to ensure the heat dissipation inside the projector. Dust, impurities and other particles in the air will enter the projector along with the circulating air. If these particles accumulate too much on the electrical components, it will cause the electrical components to have reduced sensitivity, or even cause the electrical components to have increased temperature and burn out. If they accumulate too much on the optical components, it will directly lead to a decrease in the image quality of the projector output, or even cause problems such as damage to the optical components. Therefore, dust prevention and dust removal of the projector is very important. To this end, the utility model provides a projector confidential closed dust prevention and dust removal structure, which effectively ensures that there are very few dust, impurities and other particles inside the projector, ensures the effective and normal operation of each device inside the projector, and increases the service life of the projector. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a projector confidential closed dust-proof and dust-removing structure. Under the combined action of the blowing structure and the exhaust fan, the utility model can realize rapid heat dissipation of the LCD light valve and can quickly blow away dust, impurities and other particles on the LCD light valve. At the same time, under the action of the filtering structure, the air entering the projector housing is filtered and dust-proofed, thereby ensuring that there are very few dust, impurities and other particles inside the projector, ensuring the effective and normal operation of various components inside the projector and the output quality of the projector image, and improving the service life of the projector.

[0004] To achieve the above-mentioned purpose, the utility model provides a confidential closed dust-proof and dust-removing structure for a projector, wherein the projector has a projector housing, an optical machine housing located in the projector housing, an LCD light valve located in the optical machine housing, and a heat dissipation air duct arranged around the LCD light valve; the confidential closed dust-proof and dust-removing structure for the projector includes a filtering structure, a blowing structure and an exhaust fan; the blowing structure includes at least one blower.

[0005] The blowing structure and the exhaust fan are respectively located at two opposite sides of the LCD light valve light transmission window; the blowing structure is aimed at the air inlet of the heat dissipation air duct to blow air; the exhaust fan is aimed at the air outlet of the heat dissipation air duct to exhaust air.

[0006] The projector housing is provided with an air inlet and an air outlet, and the filter structure is installed at the air inlet and the air outlet of the projector housing; when the projector is dusted, the rotation speed of the blowing structure and the exhaust fan is at the maximum value.

[0007] Furthermore, the filtering structure includes a dustproof mesh shell and a filter screen installed in the dustproof mesh shell, the filter screen includes a filter element and an outer frame arranged around the filter element, the filter element has a wavy structure, the dustproof mesh shell is connected to the projector housing, and the dustproof mesh shell and the projector housing are sealed by foam.

[0008] Furthermore, the blowing structure includes a first blower and a second blower arranged in parallel, and the first blower and the second blower are both turbine fans; the projector also has a front mirror and a field mirror, and the front mirror and the field mirror are located in the optical machine housing, and the front mirror, LCD light valve and field lens are arranged in sequence according to the direction of light travel, and the heat dissipation air duct includes a first heat dissipation air duct formed between the front mirror and the LCD light valve, and a second heat dissipation air duct formed between the LCD light valve and the field lens; the first blower and the second blower are aimed at the air inlet of the first heat dissipation air duct to blow air; the exhaust fan is aimed at the air outlet of the first heat dissipation air duct and the second heat dissipation air duct to exhaust air; the first blower and the second blower have opposite rotation directions, and when looking from the blowing structure toward the direction of the LCD light valve, the first blower rotates counterclockwise and the second blower rotates clockwise.

[0009] Preferably, the blowing structure and the exhaust fan are respectively located on two opposite long sides of the light-transmitting window of the LCD light valve.

[0010] Preferably, the first hair dryer and the second hair dryer are of the same model and specification.

[0011] Preferably, the maximum rotation speed of the first blower and the second blower is 4500 r / min, and the maximum rotation speed of the exhaust fan is 2900 r / min.

[0012] Beneficial effects of the utility model: Under the combined action of the blowing structure and the exhaust fan, the utility model realizes blowing and exhausting of the heat dissipation air duct, can quickly dissipate the heat generated by the LCD light valve, the heat dissipation effect of the LCD light valve is significant, and the output brightness of the projector is greatly improved. In addition, when removing dust, the blowing structure and the exhaust fan have a maximum rotation speed, which can quickly blow away the dust, impurities and other particles on the LCD light valve screen, ensuring the output quality of the projector image. At the same time, under the action of the filtering structure, the air entering the projector housing is filtered to prevent dust. Therefore, the utility model effectively ensures that there are very few particles such as dust and impurities inside the projector, ensures the effective and normal operation of various components inside the projector, and improves the service life of the projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 It is a three-dimensional diagram of the filtering structure of the utility model;

[0016] Figure 3 for Figure 2 Exploded diagram of

[0017] Figure 4 It is a cutaway view of the filter screen of the utility model;

[0018] Figure 5 for Figure 1 A partial stereogram after removing the projector housing and filter structure;

[0019] Figure 6 For Figure 5 Partial cut diagram after partial sectioning;

[0020] Figure 7 It is a cross-sectional view of the first hair dryer and the second hair dryer of the utility model. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example:

[0027] See also Figure 1-7 As shown, the present embodiment provides a confidential closed dust-proof and dust-removing structure for a projector, wherein the projector comprises a projector housing 1, an optical machine housing 3 located in the projector housing 1, an LCD light valve 6 located in the optical machine housing 3, and a heat dissipation air duct arranged around the LCD light valve 6; the confidential closed dust-proof and dust-removing structure for the projector comprises a filtering structure 2, a blowing structure 4 and an exhaust fan 5; the blowing structure 4 comprises at least one blower.

[0028] The blowing structure 4 and the exhaust fan 5 are respectively located on two opposite sides of the light transmission window of the LCD light valve 6. Figure 5 and 6 Taking the position shown as an example, the blowing structure 4 and the exhaust fan 5 are respectively located above and below the LCD light valve 6. The blowing structure 4 blows air toward the air inlet of the heat dissipation air duct; the exhaust fan 5 exhausts air toward the air outlet of the heat dissipation air duct.

[0029] The projector housing 1 is provided with an air inlet and an air outlet, and the filter structure 2 is installed at the air inlet and the air outlet of the projector housing 1; when the projector is dusted, the rotation speed of the blowing structure 4 and the exhaust fan 5 is at the maximum value.

[0030] In this embodiment, the projector only takes in and out air at the air inlet and outlet on the projector housing 1, and the rest of the parts are sealed. Specifically, the gaps at the projection lens, interface, etc. are sealed by foam or the like to ensure that the projector is completely in a sealed state, so that air can only enter from the air inlet of the projector housing 1 and be discharged from the air outlet of the projector housing 1. In this way, under the action of the filter structure 2 at the air inlet and outlet of the projector housing 1, the air is effectively filtered and dust-proof, ensuring that there are very few particles such as dust and impurities inside the projector, ensuring the effective and normal operation of various components inside the projector and the output quality of the projector image, and improving the service life of the projector.

[0031] In this embodiment, the blowing structure 4 and the exhaust fan 5 are combined to realize the blowing and exhaust of the heat dissipation air duct, which can quickly dissipate the heat generated by the LCD light valve 6. The heat dissipation effect of the LCD light valve 6 is significant, and the output brightness of the projector is greatly improved. When the projector needs to be dusted, the rotation speed of the blowing structure 4 and the exhaust fan 5 is the maximum value, so that the dust, impurities and other particles on the LCD light valve 6 screen can be quickly blown off, thereby realizing the rapid dust removal of the LCD light valve 6, ensuring the effective and normal operation of the LCD light valve 6 and the output quality of the projector image.

[0032] In this embodiment, the filter structure 2 preferably includes a dustproof mesh shell 20 and a filter 21 installed in the dustproof mesh shell 20, the filter 21 includes a filter element 210 and an outer frame 211 arranged around the filter element 210, the filter element 210 is a wavy structure, the dustproof mesh shell 20 is connected to the projector housing 1, and the dustproof mesh shell 20 and the projector housing 1 are sealed by foam. The filter element 210 of this embodiment adopts a wavy structure, which can not only effectively improve the filtering and dustproof effect, but also effectively reduce wind resistance and increase the air intake. At the same time, the wavy structure can help save the installation space of the filter structure 2. At the same time, the dustproof mesh shell 20 and the projector housing 1 are sealed by foam to ensure that air can only enter the projector through the filter 21.

[0033] Preferably, in this embodiment, the blowing structure 4 includes a first blower 40 and a second blower 41 arranged in parallel, and the first blower 40 and the second blower 41 are both turbine fans; the projector also has a front mirror 7 and a field mirror 8, and the front mirror 7 and the field mirror 8 are located in the optical machine housing 3, and the front mirror 7, the LCD light valve 6 and the field mirror 8 are arranged in sequence according to the direction of light travel, and the heat dissipation duct includes a first heat dissipation duct formed between the front mirror 7 and the LCD light valve 6, and a second heat dissipation duct formed between the LCD light valve 6 and the field mirror 8; the first blower 40 and the second blower 41 are aimed at the air inlet of the first heat dissipation duct for blowing; the exhaust fan 5 is aimed at the air outlet of the first heat dissipation duct and the second heat dissipation duct for exhausting; the first blower 40 and the second blower 41 have opposite rotation directions, and when looking from the blowing structure 4 toward the direction of the LCD light valve 6, the first blower 40 rotates counterclockwise, and the second blower 41 rotates clockwise.

[0034] The transmission efficiency of the current LCD light valve 6 is usually only 4%-7%, so the Joule heat converted by the LCD light valve 6 when working is mainly concentrated in the first heat dissipation duct formed by the front mirror 4 and the LCD light valve 6, while the Joule heat in the second heat dissipation duct formed by the LCD light valve 6 and the field lens 8 is significantly less. In this embodiment, the first blower 40 and the second blower 41 arranged in parallel are used to blow air to the first heat dissipation duct formed between the front mirror 7 and the LCD light valve 6 at the same time. Under the action of the first blower 40 and the second blower 41, the Joule heat between the front mirror 7 and the LCD light valve 6 is quickly dissipated. At the same time, the exhaust fan 5 is used to exhaust air from the first heat dissipation duct and the second heat dissipation duct at the same time. Under the combined action of the first blower 40, the second blower 41 and the exhaust fan 5, the heat dissipation effect of the LCD light valve 6 is significant, and the output brightness of the projector of the 4-inch LCD light valve 6 can exceed 800 lumens, and the output brightness of the projector is greatly improved.

[0035] When the LCD light valve 6 is working, the converted Joule heat is mainly concentrated in the center of the screen of the LCD light valve 6, and the temperature of the edge of the screen is relatively low. In this embodiment, the first blower 40 and the second blower 41 rotate in opposite directions. When looking from the blowing structure 4 to the direction of the LCD light valve 6, the first blower 40 rotates counterclockwise and the second blower 41 rotates clockwise. Figure 7 Sectional view( Figure 7 The arrow direction is the rotation direction of the first blower 40 and the second blower 41), so the wind blown by the first blower 40 and the second blower 41 is mainly concentrated in the center of the LCD light valve 6, which effectively reduces the temperature of the center of the LCD light valve 6 and avoids the problem of uneven heat dissipation of the LCD light valve 6 as a whole.

[0036] In this embodiment, the blowing structure 4 and the exhaust fan 5 are respectively located at two long sides opposite to the light transmission window of the LCD light valve 6. The air outlet sizes of the first blower 40 and the second blower 41 match the size of the long side of the LCD light valve 6.

[0037] In this embodiment, preferably, the first hair dryer 40 and the second hair dryer 41 have the same model and specification, that is, the first hair dryer 40 and the second hair dryer 41 have the same rotation speed. Preferably, the maximum rotation speed of the first hair dryer 40 and the second hair dryer 41 is 4500r / min, and the maximum rotation speed of the exhaust fan 5 is 2900r / min. Figure 5 In the shown orientation, the air inlet of the first hair dryer 40 faces upward, and the air inlet of the second hair dryer 41 faces downward.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A projector confidential closed dust-proof and dust-removal structure, the projector comprising a projector housing (1), an optical machine housing (3) located in the projector housing (1), an LCD light valve (6) located in the optical machine housing (3), and a heat dissipation duct arranged around the LCD light valve (6); characterized in that: The projector's closed dust-proof and dust-removal structure comprises a filtering structure (2), a blowing structure (4) and an exhaust fan (5); the blowing structure (4) comprises at least one blower; The blowing structure (4) and the exhaust fan (5) are respectively located on two opposite sides of the light-transmitting window of the LCD light valve (6); the blowing structure (4) is aimed at the air inlet of the heat dissipation air duct to blow air; the exhaust fan (5) is aimed at the air outlet of the heat dissipation air duct to exhaust air; The projector housing (1) is provided with an air inlet and an air outlet, and the filter structure (2) is installed at the air inlet and the air outlet of the projector housing (1); when the projector is dusted, the rotation speeds of the blowing structure (4) and the exhaust fan (5) are at maximum values.

2. The projector confidential closed dust-proof and dust-removal structure according to claim 1 is characterized in that: The filtering structure (2) comprises a dustproof mesh shell (20) and a filter screen (21) installed in the dustproof mesh shell (20); the filter screen (21) comprises a filter element (210) and an outer frame (211) arranged around the filter element (210); the filter element (210) is of a wavy structure; the dustproof mesh shell (20) is connected to the projector housing (1), and the dustproof mesh shell (20) and the projector housing (1) are sealed by foam.

3. The projector confidential closed dust-proof and dust-removal structure according to claim 1 is characterized in that: The blowing structure (4) comprises a first blower (40) and a second blower (41) arranged in parallel, and the first blower (40) and the second blower (41) are both turbine blowers; the projector further comprises a front mirror (7) and a scene (8), the front mirror (7) and the scene (8) are located in the optical machine housing (3), and the front mirror (7), the LCD light valve (6) and the scene (8) are arranged in sequence according to the direction of light travel; the heat dissipation air duct comprises a first heat dissipation air duct formed between the front mirror (7) and the LCD light valve (6), and a second heat dissipation air duct formed between the LCD light valve (6) and the scene (8); The first blower (40) and the second blower (41) are aimed at the air inlet of the first heat dissipation air duct to blow air; the exhaust fan (5) is aimed at the air outlet of the first heat dissipation air duct and the second heat dissipation air duct to exhaust air; the first blower (40) and the second blower (41) rotate in opposite directions; when viewed from the blowing structure (4) in the direction of the LCD light valve (6), the first blower (40) rotates counterclockwise, while the second blower (41) rotates clockwise.

4. The projector confidential closed dust-proof and dust-removal structure according to claim 3 is characterized in that: The blowing structure (4) and the exhaust fan (5) are respectively located on two opposite long sides of the light-transmitting window of the LCD light valve (6).

5. The projector's closed dust-proof and dust-removal structure according to claim 3 is characterized in that: The first hair dryer (40) and the second hair dryer (41) are of the same model and specification.

6. The projector confidential closed dust-proof and dust-removal structure according to claim 3 is characterized in that: The maximum rotation speed of the first blower (40) and the second blower (41) is 4500 r / min, and the maximum rotation speed of the exhaust fan (5) is 2900 r / min.

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