Internal circulation double-air-duct projector

Abstract

The utility model discloses an internal circulation double-air-duct projector, and relates to the technical field of projection equipment manufacturing. The internal circulation double-air-duct projector comprises a front Fresnel lens, an LCD screen, a lens support, a projector shell, a first radiator, a second radiator, a first internal circulation fan, a second internal circulation fan, a lens, heat insulation glass and a rear Fresnel lens. Air blown out of an air outlet of the first circulating fan passes through the LCD screen, the heat insulation glass and the rear Fresnel lens and becomes hot air, so that the LCD screen, the heat insulation glass and the rear Fresnel lens are cooled, the hot air enters the first radiator, one part of the first radiator is located in the projector shell, and the other part of the first radiator is located outside the projector shell. Therefore, heat exchange inside and outside the projector shell is realized, and hot air passing through the projector shell is cooled. And air blown out from the air outlet of the second circulating fan passes through the front Fresnel lens and the LCD screen to become hot air, so that the front Fresnel lens and the LCD screen are cooled, and the hot air enters the second radiator, so that heat exchange between the inside and the outside of the projector shell is realized, and the hot air passing through the projector shell is cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of projection equipment manufacturing, in particular to an internal circulation double-air duct projector. Background Art

[0002] In recent years, projectors have developed rapidly in the fields of DMD / lcos / LCD and other technologies. Consumers' pursuit of comfortable viewing experience brought by projectors is still on the rise. Among them, the price advantage of single LCD projectors (only 1 / 3 of the price of similar picture quality or even lower) is growing significantly. In the internal circulation of the current closed optical machine, the area that needs heat dissipation has a single wind direction. As the wind flows through the heat source lens, the temperature is getting higher and higher. The heat dissipation of the entire area is relatively unbalanced, especially the temperature of the liquid crystal display LCD is uneven, resulting in continuous changes in light transmittance, resulting in poor uniformity and color uniformity of the overall projection picture. Therefore, a new solution is urgently needed in the existing technology to solve the above problems. Utility Model Content

[0003] The problem to be solved by the utility model is to solve the problem that the single-cycle heat dissipation of the current projector causes uneven LCD temperature.

[0004] The utility model provides an internal circulation double-air duct projector, comprising a front Fresnel mirror, an LCD screen, a lens bracket, a projector housing, a first radiator, a second radiator, a first internal circulation fan, a second internal circulation fan, a lens, a heat-insulating glass and a rear Fresnel mirror;

[0005] The lens and the lens bracket are respectively located at the front end and the rear end of the projector housing;

[0006] The front Fresnel mirror and the LCD screen are mounted on the lens bracket;

[0007] The lens bracket is arranged in the projector housing, and the front Fresnel mirror, the LCD screen, the heat-insulating glass and the rear Fresnel mirror are arranged in parallel in sequence;

[0008] The first radiator passes through the bottom of the projector housing;

[0009] The second radiator passes through the side of the projector housing;

[0010] The first internal circulation fan is arranged in the projector housing and opposite to the first radiator, and the air outlet of the first internal circulation fan is oriented between the LCD screen and the heat-insulating glass and between the heat-insulating glass and the rear Fresnel mirror;

[0011] The air blown out by the first internal circulation fan passes through the LCD screen, the heat-insulating glass and the rear Fresnel mirror and enters the first radiator;

[0012] The second internal circulation fan is arranged in the projector housing and is arranged opposite to the second radiator; the air outlet of the second internal circulation fan is oriented toward between the front Fresnel mirror and the LCD screen;

[0013] The air blown out by the second internal circulation fan passes through the front Fresnel mirror and the LCD screen and enters the second radiator.

[0014] The lens bracket is provided with a lens mounting groove, and the front Fresnel mirror and the LCD screen are fixed in the lens mounting groove by being buckled.

[0015] The projector housing is provided with a mounting slot, and the lens bracket is inserted into the mounting slot.

[0016] It also includes a box body, the projector housing is arranged in the box body, a box body radiator is arranged on the box body, and a box body fan with an air outlet facing the outside of the box body is arranged on the box body radiator.

[0017] The beneficial effects of the present application are as follows: the air blown out of the air outlet of the first circulation fan passes through the LCD screen, the heat-insulating glass and the rear Fresnel mirror to become hot air, thereby cooling the LCD screen, the heat-insulating glass and the rear Fresnel mirror, and the hot air enters the first radiator, a part of the first radiator is located inside the projector housing, and a part of the first radiator is located outside the projector housing, thereby realizing heat exchange between the inside and outside of the projector housing, so that the hot air passing through it is cooled. The air blown out of the air outlet of the second circulation fan passes through the front Fresnel mirror and the LCD screen to become hot air, thereby cooling the front Fresnel mirror and the LCD screen, and the hot air enters the second radiator, a part of the second radiator is located inside the projector housing, and a part of the second radiator is located outside the projector housing, thereby realizing heat exchange between the inside and outside of the projector housing, so that the hot air passing through it is cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of an internal circulation double-duct projector of the utility model.

[0019] Figure 2 The utility model is a schematic diagram of the structure inside the projector housing of an internal circulation dual-air duct projector.

[0020] Figure 3 The utility model is an assembly diagram of a lens bracket of an internal circulation double-air duct projector.

[0021] Figure 4 The utility model is a schematic diagram of the interior of an internal circulation double-air duct projector.

[0022] Figure 5 The utility model is a schematic diagram of a cabinet of an internal circulation double-air duct projector. DETAILED DESCRIPTION

[0023] In view of the shortcomings of the above existing measurement technology, the utility model proposes an internal circulation double air duct projector, such as Figure 1-Figure 5 As shown, it includes a front Fresnel mirror 1112, an LCD screen 1113, a lens bracket 111, a projector housing 1106, a first radiator 1101, a second radiator 1105, a first internal circulation fan 1107, a second internal circulation fan 1108, a lens 1104, a heat-insulating glass 1115 and a rear Fresnel mirror 1116;

[0024] The lens 1104 and the lens bracket 111 are respectively located at the front end and the rear end of the projector housing 1106;

[0025] The front Fresnel mirror 1112 and the LCD screen 1113 are mounted on the lens bracket 111;

[0026] The lens bracket 111 is arranged in the projector housing 1106, and the front Fresnel mirror 1112, the LCD screen 1113, the heat-insulating glass 1115 and the rear Fresnel mirror 1116 are arranged in parallel in sequence;

[0027] The first heat sink 1101 passes through the bottom of the projector housing 1106;

[0028] The second radiator 1105 passes through the side of the projector housing 1106;

[0029] The first internal circulation fan 1107 is arranged in the projector housing 1106 and is arranged opposite to the first radiator 1101, and the air outlet of the first internal circulation fan 1107 is oriented between the LCD screen 1113 and the heat-insulating glass (1115) and between the heat-insulating glass 1115 and the rear Fresnel mirror 1116;

[0030] The air blown out by the first internal circulation fan 1107 passes through the LCD screen 1113, the heat-insulating glass 1115 and the rear Fresnel mirror 1116 and enters the first radiator 1101;

[0031] The second internal circulation fan 1108 is disposed in the projector housing and is disposed opposite to the second radiator 1105; the air outlet of the second internal circulation fan 1108 faces between the front Fresnel mirror 1112 and the LCD screen 1113;

[0032] The air blown out by the second internal circulation fan 1108 passes through the front Fresnel mirror 1112 and the LCD screen 1113 and enters the second radiator 1105 .

[0033] The lens bracket 111 is provided with a lens mounting groove, and the front Fresnel mirror 1112 and the LCD screen 1113 are fixed in the lens mounting groove via an undercut 1114 .

[0034] The projector housing is provided with a mounting slot, and the lens bracket 111 is inserted into the mounting slot.

[0035] The device further comprises a box 1102 , wherein the projector housing 1106 is disposed in the box 1102 , a box radiator 1109 is disposed on the box 1102 , and a box fan 1110 with an air outlet facing the outside of the box 1102 is disposed on the box radiator 1109 .

[0036] The air blown out of the air outlet of the first circulation fan 1107 passes through the LCD screen 1113, the heat-insulating glass 1115 and the rear Fresnel mirror 1116 to become hot air, thereby cooling the LCD screen 1113, the heat-insulating glass 1115 and the rear Fresnel mirror 1116, and the hot air enters the first radiator 1101. A part of the first radiator 1101 is located inside the projector housing 1106, and a part of it is located outside the projector housing 1106, thereby realizing heat exchange between the inside and outside of the projector housing 1106, so that the hot air passing through it is cooled. The air blown out of the air outlet of the second circulation fan 1108 passes through the front Fresnel mirror 1112 and the LCD screen 1113 to become hot air, thereby cooling the front Fresnel mirror 1112 and the LCD screen 1113, and the hot air enters the second radiator 1105. A part of the second radiator 1105 is located inside the projector housing 1106, and a part of it is located outside the projector housing 1106, thereby realizing heat exchange between the inside and outside of the projector housing 1116, so that the hot air passing through it is cooled. The air temperature between the projector housing 1106 and the cabinet 1102 gradually increases through heat exchange between the first radiator 1101 and the second radiator 1105, and the cabinet radiator 1109 and the cabinet fan 1110 cooperate to blow the hot air in the cabinet 1102 out of the cabinet 1102, thereby reducing the air temperature between the cabinet 1102 and the projector housing 1106.

[0037] In order to observe the use effect of the present application, the inventor conducted an experiment. Under the room temperature of 25°C, an internal circulation dual-duct projector provided by the present application was taken as sample 1, and a projector with only the first circulation fan 1107 and the first radiator 1101 was taken as sample 2 for testing. Samples 1 and 2 were turned on at the same time, and after 2 hours of operation, the temperature of the lenses in samples 1 and 2 was observed. The specific temperature values ​​are shown in Table 1.

[0038] Table 1: Temperature conditions inside sample 1 and sample 2.

[0039]

[0040] As shown in Table 1, after the samples 1 and 2 were run simultaneously for two hours, the temperature of the LCD screen 1113 and the heat-insulating glass 1115 in the sample 1 was more than 12°C lower than the temperature at the same position of the sample 2. It can be seen that the solution provided by the utility model has obvious heat dissipation effect and the uniformity is also greatly improved.

[0041] Finally, the present invention should explain that: the above embodiments are detailed descriptions of the technical solutions of the present invention and are not limited to the aforementioned embodiments. Those skilled in the art should understand that modifications or replacements of the features and parameters in the aforementioned embodiments do not deviate from the spirit and scope of the technical solutions of the aforementioned embodiments.

Claims

1. An internal circulation dual-duct projector, characterized in that: It comprises a front Fresnel mirror (1112), an LCD screen (1113), a lens bracket (111), a projector housing (1106), a first radiator (1101), a second radiator (1105), a first internal circulation fan (1107), a second internal circulation fan (1108), a lens (1104), a heat-insulating glass (1115) and a rear Fresnel mirror (1116); The lens (1104) and the lens bracket (111) are respectively located at the front end and the rear end of the projector housing (1106); The front Fresnel mirror (1112) and the LCD screen (1113) are mounted on the lens bracket (111); The lens bracket (111) is arranged in the projector housing (1106), and the front Fresnel mirror (1112), the LCD screen (1113), the heat-insulating glass (1115) and the rear Fresnel mirror (1116) are arranged in parallel in sequence; The first heat sink (1101) passes through the bottom of the projector housing (1106); The second heat sink (1105) passes through the side of the projector housing (1106); The first internal circulation fan (1107) is arranged in the projector housing (1106) and is arranged opposite to the first heat sink (1101), and the air outlet of the first internal circulation fan (1107) is oriented between the LCD screen (1113) and the heat insulation glass (1115) and between the heat insulation glass (1115) and the rear Fresnel mirror (1116); The air blown out by the first internal circulation fan (1107) passes through the LCD screen (1113), the heat-insulating glass (1115) and the rear Fresnel mirror (1116) and enters the first radiator (1101); The second internal circulation fan (1108) is arranged in the projector housing and is arranged opposite to the second heat sink (1105); the air outlet of the second internal circulation fan (1108) faces between the front Fresnel mirror (1112) and the LCD screen (1113); The air blown out by the second internal circulation fan (1108) passes through the front Fresnel mirror (1112) and the LCD screen (1113) and enters the second radiator (1105).

2. According to claim 1, the internal circulation dual-duct projector is characterized in that: The lens bracket (111) is provided with a lens mounting groove, and the front Fresnel mirror (1112) and the LCD screen (1113) are fixed in the lens mounting groove by means of an undercut (1114).

3. According to claim 1, the internal circulation dual-duct projector is characterized in that: The projector housing is provided with a mounting slot, and the lens bracket (111) is inserted into the mounting slot.

4. According to claim 1, the internal circulation dual-duct projector is characterized in that: It also includes a box (1102), wherein the projector housing (1106) is arranged in the box (1102), a box radiator (1109) is arranged on the box (1102), and a box fan (1110) with an air outlet facing the outside of the box (1102) is arranged on the box radiator (1109).

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