LCD projector

Abstract

The utility model discloses an LCD projector, and relates to the technical field of projection equipment. The LCD projector comprises a shell, a liquid cooling system and an air cooling system, a light source, an LCD screen and a lens are arranged in the shell, and light emitted by the light source can be projected through the lens after passing through the LCD screen; the liquid cooling system comprises a first liquid cooling pipe, a first heat exchange piece and a first liquid storage tank, the first liquid cooling pipe is connected with the first heat exchange piece and the first liquid storage tank, cooling liquid is arranged in the first liquid storage tank and the first liquid cooling pipe in a flowing mode, and the first heat exchange piece abuts against the light source in a heat exchange mode; the air cooling system comprises a fan, and the fan is arranged on the side wall of the shell so that air in the shell can be blown out of the shell through the fan. According to the LCD projector, heat accumulation of equipment in a high-brightness and high-power consumption mode can be reduced, the stability and reliability of the equipment are enhanced, the brightness of the projector is prevented from being reduced, and the projection quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to projection equipment technical field especially relates to a LCD projector. BACKGROUND

[0002] In the current LCD projector market, with the increasing demand for projection brightness and picture quality, the lumens of the projector are also higher and higher, that is, the higher the power of the imaging module laser inside the projector, and in the running process of the equipment, the heat generated by the high-power laser and power supply will affect the normal work of the module.

[0003] At present, the LCD projector mainly adopts the air cooling mode for heat dissipation, however, the air cooling heat dissipation efficiency is limited, and the heat cannot be dissipated in time and effectively, resulting in the problem of brightness decrease of the projector after long time work, affecting the projection quality, and also affecting the stability and reliability of the equipment. UTILITY MODEL CONTENTS

[0004] The utility model discloses a LCD projector, can reduce the heat accumulation of equipment under high brightness high power consumption mode, enhance the stability and reliability of equipment, avoid the brightness decrease of projector, improve the projection quality.

[0005] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0006] A LCD projector, comprising:

[0007] A shell is provided with a light source, an LCD screen and a lens inside, the light emitted by the light source can be projected through the lens after passing through the LCD screen;

[0008] A liquid cooling system comprising a first liquid cooling pipe, a first heat exchange member and a first liquid storage tank, the first liquid cooling pipe connects the first heat exchange member and the first liquid storage tank, and cooling liquid is flowingly arranged in the first liquid storage tank and the first liquid cooling pipe, and the first heat exchange member is in heat exchange abutment with the light source;

[0009] An air cooling system comprising a fan, the fan is arranged on the side wall of the shell, so that the gas in the shell is blown out of the shell by the fan.

[0010] As an optional solution of the above-mentioned LCD projector, the air cooling system further comprises a second liquid cooling pipe, a second heat exchange member and a second liquid storage tank, the second liquid cooling pipe connects the second heat exchange member and the second liquid storage tank, and cooling liquid is flowingly arranged in the second liquid storage tank and the second liquid cooling pipe, and the first liquid cooling pipe is in heat exchange connection with the second liquid cooling pipe, and the gas driven by the fan flows through the second heat exchange member.

[0011] As an optional solution of the LCD projector, the first liquid cooling pipe is in communication with the second liquid cooling pipe.

[0012] As an optional solution of the LCD projector, the LCD projector further comprises a heat exchange assembly, the heat exchange assembly comprises a hot end box and a cold end box connected in heat exchange, the first liquid cooling pipe is in communication with the cold end box, and the second liquid cooling pipe is in communication with the hot end box.

[0013] As an optional solution of the LCD projector, the heat exchange assembly further comprises a semiconductor refrigeration device, and the semiconductor refrigeration device is arranged between the hot end box and the cold end box.

[0014] As an optional solution of the LCD projector, the first heat exchange device and the second heat exchange device are in heat exchange abutment.

[0015] As an optional solution of the LCD projector, the fan is arranged beside the LCD screen, and an included angle between a direction in which the fan drives the gas to flow and the LCD screen is less than 90°.

[0016] As an optional solution of the LCD projector, the LCD projector further comprises a reflector, the reflector is located between the LCD screen and the lens, and light passing through the LCD screen is reflected by the reflector and then projected through the lens.

[0017] As an optional solution of the LCD projector, the LCD projector further comprises a light funnel, opposite two ends of the light funnel are respectively provided with a light inlet and a light outlet, a cross-sectional area of the light funnel gradually increases in a direction from the light inlet to the light outlet, the light source is arranged at the light inlet, and the LCD screen is arranged at the light outlet.

[0018] As an optional solution of the LCD projector, the first liquid storage tank comprises an outer layer and an inner layer, the inner layer is arranged in the outer layer and is arranged in a spaced mode with the outer layer, and a vacuum state is formed between the inner layer and the outer layer.

[0019] The LCD projector has the following beneficial effects:

[0020] The LCD projector provided by the utility model has the liquid cooling system and the air cooling system, the liquid cooling system is used for dissipating heat of the light source with high heat generation, the air cooling system is used for blowing heat of other structures in the shell out of the shell, the cooling liquid of the liquid cooling system has high heat dissipation efficiency and can quickly absorb heat emitted by the light source, heat accumulation of the equipment in a high-brightness and high-power mode is reduced, stability and reliability of the equipment are enhanced, brightness of the projector is prevented from being reduced, and projection quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of an LCD projector provided by the utility model;

[0022] Figure 2 is a structural schematic diagram of a liquid cooling system and an air cooling system provided by the utility model.

[0023] In the figure:

[0024] 1, shell; 11, light source; 12, LCD screen; 13, lens;

[0025] 2, liquid cooling system; 21, first liquid cooling pipe; 22, first heat exchange element; 23, first liquid storage tank; 24, first liquid cooling pump;

[0026] 3, air cooling system; 31, second liquid cooling pipe; 32, second heat exchange element; 33, second liquid storage tank; 34, second liquid cooling pump; 35, fan;

[0027] 4, heat exchange assembly; 41, hot end box body; 42, cold end box body; 43, semiconductor refrigeration element;

[0028] 5, reflector;

[0029] 6, light funnel. DETAILED DESCRIPTION

[0030] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0031] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0032] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] This embodiment provides an LCD projector, such as Figure 1 As shown, the LCD projector includes a housing 1, within which a light source 11, an LCD screen 12, and a lens 13 are disposed. The LCD screen 12 is used for image display. When light emitted from the light source 11 passes through the LCD screen 12, it is projected through the lens 13, thus displaying the image of the LCD screen 12 on a screen. It is understood that both the light source 11 and the LCD screen 12 generate heat during operation. To dissipate this heat to the outside of the housing 1 in a timely manner, the LCD projector also includes a cooling system 3. The cooling system 3 includes a fan 35, which is disposed on the side wall of the housing 1, allowing air inside the housing 1 to be blown out of the housing 1.

[0036] Since the light source 11 is small in size and the LCD screen 12 is large in area, in order to ensure that the light emitted by the light source 11 can pass through the LCD screen 12 evenly, the LCD projector also includes a light chamber 6. The light chamber 6 has a light inlet and a light outlet at opposite ends, and the cross-sectional area of ​​the light chamber 6 gradually increases along the direction from the light inlet to the light outlet. The light source 11 is located at the light inlet and the LCD screen 12 is located at the light outlet.

[0037] In order to improve the projection quality of the projector, the lumens of the projector are getting higher and higher, that is, the power of the imaging module laser inside the projector is getting higher and higher, and the heat generated by the high-power laser and the power supply during the operation of the equipment will affect the normal work of the module. The projector generally adopts air cooling for heat dissipation, and due to the limited heat dissipation efficiency of air cooling, the heat cannot be dissipated in time and effectively, resulting in the problem of brightness decrease of the projector after long-time work, affecting the projection quality, and also affecting the stability and reliability of the equipment.

[0038] As shown in Figure 1 and Figure 2 To solve the above problems, the LCD projector further comprises a liquid cooling system 2, the liquid cooling system 2 comprising a first liquid cooling pipe 21, a first heat exchange member 22 and a first liquid storage tank 23, the first liquid cooling pipe 21 connecting the first heat exchange member 22 and the first liquid storage tank 23, and the first liquid storage tank 23 and the first liquid cooling pipe 21 being provided with flowing cooling liquid, and the first heat exchange member 22 being in heat exchange abutment with the light source 11. The cooling liquid in the first liquid storage tank 23 can flow to the first heat exchange member 22 through the first liquid cooling pipe 21, at this time the cooling liquid absorbs the heat of the light source 11 and then flows back to the first liquid storage tank 23 through the first liquid cooling pipe 21.

[0039] The LCD projector is provided with the liquid cooling system 2 and the air cooling system 3 at the same time, and uses the liquid cooling system 2 to dissipate the heat of the light source 11 with high heat generation, and uses the air cooling system 3 to blow out the heat of other structures inside the shell 1. Since the cooling liquid of the liquid cooling system 2 has high heat dissipation efficiency, it can quickly absorb the heat emitted by the light source 11, thereby reducing the heat accumulation of the equipment in the high-brightness and high-power consumption mode, enhancing the stability and reliability of the equipment, avoiding the brightness decrease of the projector, and improving the projection quality.

[0040] Generally, the cooling liquid of the first liquid cooling pipe 21 needs to dissipate the heat after absorbing the heat of the light source 11, in order to ensure that the liquid cooling system 2 can continuously dissipate the heat of the light source 11. To achieve the above purpose, the air cooling system 3 further comprises a second liquid cooling pipe 31, a second heat exchange member 32 and a second liquid storage tank 33, the second liquid cooling pipe 31 connecting the second heat exchange member 32 and the second liquid storage tank 33, and the second liquid storage tank 33 and the second liquid cooling pipe 31 being provided with flowing cooling liquid, and the first liquid cooling pipe 21 being in heat exchange connection with the second liquid cooling pipe 31, and the gas driven by the fan 35 flowing through the second heat exchange member 32.

[0041] Since the first liquid cooling pipe 21 and the second liquid cooling pipe 31 are connected for heat exchange, the heat absorbed by the coolant in the first liquid cooling pipe 21 can be transferred to the coolant in the second liquid cooling pipe 31. Then, when the coolant in the second liquid cooling pipe 31 flows to the second heat exchanger 32, it can release the absorbed heat into the surrounding air. The air that has absorbed heat can be dissipated to the outside of the housing 1 under the drive of the fan 35, thereby realizing the operation of transferring heat from the light source 11 to the outside of the housing 1 and achieving the purpose of rapidly cooling the light source 11.

[0042] In this embodiment, the first liquid storage tank 23 includes an outer layer and an inner layer, with the inner layer disposed inside the outer layer and spaced apart from it, and a vacuum state between the inner and outer layers. This structure can keep the coolant in the first liquid storage tank 23 warm, prevent it from exchanging heat with other structures inside the outer casing 1, and ensure that all heat can be transferred to the fan 35.

[0043] Similarly, the second liquid storage tank 33 also includes an outer layer and an inner layer. The inner layer is disposed inside the outer layer and spaced apart from the outer layer. The space between the inner layer and the outer layer is a vacuum.

[0044] The outer layer is made of stainless steel, and the inner layer is made of corrosion-resistant plastic. The outer layer protects the overall structure of the first liquid storage tank 23 and the second liquid storage tank 33, while the inner layer prevents corrosion by the coolant and ensures the normal use of the first liquid storage tank 23 and the second liquid storage tank 33.

[0045] like Figure 2 As shown, in order to ensure that the coolant can flow in the first liquid cooling pipe 21 or the second liquid cooling pipe 31, the liquid cooling system 2 also includes a first liquid cooling pump 24, which is fixedly connected to the first liquid storage tank 23 and can drive the coolant to flow in the first liquid cooling pipe 21. The air cooling system 3 also includes a second liquid cooling pump 34, which is fixedly connected to the second liquid storage tank 33 and can drive the coolant to flow in the second liquid cooling pipe 31.

[0046] In some embodiments, the first liquid cooling pipe 21 is connected to the second liquid cooling pipe 31. That is, the air-cooled system 3 and the liquid cooling system 2 are connected in series. When the coolant absorbs the heat from the light source 11 at the first heat exchanger 22, it can flow to the second heat exchanger 32 to dissipate heat, thereby realizing the transfer of heat.

[0047] It is understandable that the rate of heat transfer is positively correlated with the temperature difference; the greater the temperature difference, the higher the rate of heat transfer. Therefore, when the coolant's temperature rises only slightly after absorbing heat, the heat dissipation efficiency of the coolant at the second heat exchanger 32 is relatively low. For example... Figure 2As shown, in order to improve the heat dissipation efficiency of the liquid cooling system 2, in the embodiment, the LCD projector further comprises a heat exchange assembly 4, which comprises a hot end box 41 and a cold end box 42 connected in heat exchange, the first liquid cooling pipe 21 communicates with the cold end box 42, and the second liquid cooling pipe 31 communicates with the hot end box 41.

[0048] The heat exchange assembly 4 is of a heat pump type, which can ensure the heat exchange efficiency when the temperature of the cooling liquid is not high by increasing the temperature difference between the cold end box 42 and the hot end box 41, thereby ensuring the heat dissipation efficiency of the liquid cooling system 2 in a wide temperature range.

[0049] In the embodiment, the heat exchange assembly 4 is of a semiconductor heat exchange structure, and further comprises a semiconductor refrigeration device 43 arranged between the hot end box 41 and the cold end box 42. By using the Peltier effect of the semiconductor, when direct current passes through an electric couple formed by two different semiconductor materials in series, heat can be absorbed and released at the two ends of the electric couple, respectively, so that the purpose of refrigeration can be achieved. The semiconductor refrigeration device 43 has no moving parts, so it has high reliability and stability, and also does not produce noise.

[0050] In the embodiment, the first heat exchange member 22 and the second heat exchange member 32 are in heat exchange abutment. When the LCD projector operates at a low power, the heat dissipation demand of the light source 11 is not high, at this time, the first heat exchange member 22 and the second heat exchange member 32 can directly perform heat transfer to dissipate heat, without starting the first liquid cooling pump 24, the second liquid cooling pump 34 and the semiconductor refrigeration device 43, thereby effectively saving energy.

[0051] It can be understood that the LCD screen 12 also generates heat during operation, but the heat generation power is low. In order to cool the LCD screen 12 by the fan 35, the fan 35 is arranged beside the LCD screen 12, and the angle between the direction of the air flow driven by the fan 35 and the LCD screen 12 is less than 90°.

[0052] When the fan 35 is started, the air can blow through the surface of the LCD screen 12 from the front and back sides of the LCD screen 12, thereby taking away the heat generated by the LCD screen 12 to cool the LCD screen 12. Preferably, the angle between the direction of the air flow driven by the fan 35 and the LCD screen 12 is 0°. This structure can reduce the resistance of the air to the LCD screen 12 as much as possible, thereby avoiding power loss and ensuring the heat dissipation efficiency.

[0053] In the embodiment, the LCD projector further comprises a reflector 5, which is located between the LCD screen 12 and the lens 13. The light passing through the LCD screen 12 is reflected by the reflector 5 and then projected through the lens 13. By arranging the reflector 5, the relative position between the LCD screen 12 and the lens 13 can be changed, so that the structure in the housing 1 is more compact, the space utilization in the housing 1 is improved, and the volume of the LCD projector is reduced.

[0054] The above merely describes the preferred embodiments of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range can be changed, and the content of the description should not be understood as a limitation of the present application.

Claims

1. An LCD projector, characterized by comprising: The application relates to an LCD projector. The LCD projector comprises a shell (1), a light source (11), an LCD screen (12) and a lens (13) arranged in the shell (1), light emitted by the light source (11) can be projected through the lens (13) after passing through the LCD screen (12); A liquid cooling system (2) comprises a first liquid cooling pipe (21), a first heat exchange part (22) and a first liquid storage tank (23), the first liquid cooling pipe (21) is connected with the first heat exchange part (22) and the first liquid storage tank (23), cooling liquid flows in the first liquid storage tank (23) and the first liquid cooling pipe (21), and the first heat exchange part (22) is in heat exchange abutment with the light source (11); An air cooling system (3) comprises a fan (35), the fan (35) is arranged on a side wall of the shell (1) so that air in the shell (1) is blown out of the shell (1) through the fan (35).

2. The LCD projector of claim 1, wherein, The air cooling system (3) further comprises a second liquid cooling pipe (31), a second heat exchange part (32) and a second liquid storage tank (33), the second liquid cooling pipe (31) is connected with the second heat exchange part (32) and the second liquid storage tank (33), cooling liquid flows in the second liquid storage tank (33) and the second liquid cooling pipe (31), and the first liquid cooling pipe (21) is in heat exchange connection with the second liquid cooling pipe (31), air driven by the fan (35) passes through the second heat exchange part (32).

3. The LCD projector of claim 2, wherein, The first liquid cooling pipe (21) is in communication with the second liquid cooling pipe (31).

4. The LCD projector of claim 2, wherein, The LCD projector further comprises a heat exchange assembly (4), the heat exchange assembly (4) comprises a hot end tank (41) and a cold end tank (42) in heat exchange connection, the first liquid cooling pipe (21) is in communication with the cold end tank (42), and the second liquid cooling pipe (31) is in communication with the hot end tank (41).

5. The LCD projector of claim 4, wherein, The heat exchange assembly (4) further comprises a semiconductor refrigeration part (43), the semiconductor refrigeration part (43) is arranged between the hot end tank (41) and the cold end tank (42).

6. The LCD projector of claim 2, wherein, The first heat exchange part (22) is in heat exchange abutment with the second heat exchange part (32).

7. The LCD projector of claim 1, wherein, The fan (35) is arranged beside the LCD screen (12), and the angle between the direction in which air is driven to flow by the fan (35) and the LCD screen (12) is less than 90 degrees.

8. The LCD projector of claim 1, wherein, The LCD projector further comprises a reflector (5), the reflector (5) is located between the LCD screen (12) and the lens (13), light passing through the LCD screen (12) is reflected by the reflector (5) and then projected through the lens (13).

9. The LCD projector of claim 1, wherein, The LCD projector further comprises a light funnel (6), opposite ends of the light funnel (6) are respectively provided with a light inlet and a light outlet, the cross-sectional area of the light funnel (6) gradually increases in the direction from the light inlet to the light outlet, the light source (11) is arranged at the light inlet, and the LCD screen (12) is arranged at the light outlet.

10. The LCD projector of claim 1, wherein, The first liquid storage tank (23) comprises an outer layer and an inner layer, the inner layer is arranged in the outer layer and is arranged in a spaced manner with the outer layer, and a vacuum state is formed between the inner layer and the outer layer.

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