Projector ray machine temperature control refrigeration device
By using a combination of cooling elements and fans, the optical engine temperature is monitored in real time and cooling is controlled, which solves the problem of increased internal temperature of the optical engine under high temperature conditions, ensuring brightness and user experience.
Patent Information
- Application Number
- CN202520375941.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-03-05
AI Technical Summary
Existing projectors experience increased internal optical engine temperature under high-temperature conditions, leading to increased screen temperature and issues such as reddish discoloration in dark areas. This also results in reduced brightness and a poor user experience.
A combination of a cooling chip and a fan is used. The internal temperature of the optical engine is monitored in real time by a temperature sensor, and the operation of the cooling chip and the fan is controlled to achieve effective cooling of the internal part of the optical engine, maintain a reasonable temperature range, and ensure brightness.
Effective control of the optical engine temperature under high temperature conditions prevents brightness reduction and improves user experience.
Smart Images
Figure CN223770523U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of projector technology, and more specifically, to a projector optical engine temperature control cooling device. Background Technology
[0002] As ambient temperature rises, the internal temperature of the projector's optical engine and screen also increase. High temperatures can lead to issues such as a reddish tinge in dark areas and reduced lifespan. Current solutions involve adjusting the cooling logic through software; that is, increasing fan speed and reducing lamp current to prevent screen overheating under high temperatures. However, this method reduces projector brightness, resulting in a poor user experience under excessively high temperatures.
[0003] Therefore, how to ensure that the projector brightness is normal while keeping the internal temperature of the optical engine within a reasonable range is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a projector optical engine temperature control cooling device that can ensure the internal temperature of the optical engine is within a reasonable temperature range while ensuring the normal brightness of the projector.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A projector optical engine temperature control cooling device includes an optical engine, a cooling chip, and a control device. The hot end of the cooling chip is located outside the optical engine, and the cold end of the cooling chip is located inside the optical engine. A first fan is provided inside the optical engine adjacent to the cold end of the cooling chip. A temperature sensor is provided inside the optical engine. The first fan, the temperature sensor, and the cooling chip are all signal-connected to the control device.
[0007] Preferably, the air intake of the first fan faces the cold end of the cooling chip, and the air outlet blows air towards the lamp board inside the optical engine.
[0008] Preferably, the hot ends of the first fan and the cooling chip are located on one side of the optical engine from top to bottom, the lamp board is located on the other side of the optical engine, and a lens screen assembly facing the air outlet of the first fan is arranged above the lamp board.
[0009] Preferably, the lamp board is connected to a lamp board heat sink extending inside the optical engine, and a second fan is provided near the lamp board heat sink, and the second fan is signal-connected to the control device.
[0010] Preferably, the second fan is positioned adjacent to the hot end of the cooling element.
[0011] Preferably, the optical engine, the cooling chip, the lamp plate heat sink, and the second fan are all located inside the housing. The housing has a first opening near the hot end of the cooling chip and a second opening near the lamp plate heat sink. The air intake of the second fan faces the hot end of the cooling chip, and the air outlet faces the lamp plate heat sink.
[0012] Preferably, the second fan is located directly below the cooling chip, the lamp plate heat sink is located directly below the lamp plate, and both the second fan and the lamp plate heat sink are fixed to the bottom of the housing.
[0013] Preferably, the first opening and the second opening are located on opposite sides of the outer casing.
[0014] Preferably, the cold end of the cooling chip is provided with a cold end heat sink, the hot end of the cooling chip is provided with a hot end heat sink, and heat insulation cotton is provided between the hot end of the cooling chip and the hot end heat sink.
[0015] The projector optical engine temperature control cooling device provided by this utility model has a temperature sensor that can monitor the internal temperature of the optical engine in real time and transmit the data to the control device. When the internal temperature of the optical engine exceeds the preset temperature, it indicates that the internal temperature of the optical engine has risen and needs to be cooled. The control device can control the voltage and current of the cooling chip to achieve the required cooling capacity at the cold end of the cooling chip. The first fan is turned on, which accelerates the air flow inside the optical engine, allowing the air to exchange heat with the cold end of the cooling chip, thereby achieving the effect of cooling the internal temperature of the optical engine. This ensures that the internal temperature of the optical engine is within a reasonable temperature range, and there is no need to reduce the lamp board current, ensuring the normal brightness of the projector and thus improving the user experience under high temperature conditions. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0017] Figure 1 A first-view structural schematic diagram of the projector optical engine temperature control cooling device provided by this utility model;
[0018] Figure 2 A schematic diagram of the projector optical engine temperature control cooling device provided by this utility model from a second perspective;
[0019] Figure 3A partial exploded view of the projector optical engine temperature control cooling device provided by this utility model;
[0020] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;
[0021] Figure 5 This is a schematic diagram of the assembly of the cooling chip and the optomechanic provided by this utility model;
[0022] Figure 6 This is a cross-sectional view of the projector optical engine temperature control cooling device provided by this utility model.
[0023] Figure label:
[0024] 1-Optical engine; 2-Outer shell; 21-Front shell; 22-Upper shell; 23-Bottom shell; 3-Cooler; 4-First fan; 5-Temperature sensor; 6-Lamp board; 7-Lens screen assembly; 71-First Fresnel lens; 72-Screen; 73-Heat insulation glass; 74-Second Fresnel lens; 75-Light chamber; 8-Lamp board heat sink; 9-Second fan; 10-First opening; 11-Second opening; 12-Cold end heat sink; 13-Hot end heat sink; 14-Heat insulation cotton. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] The core of this utility model is to provide a projector optical engine temperature control and cooling device, which can ensure that the internal temperature of the optical engine is within a reasonable temperature range while ensuring the normal brightness of the projector.
[0027] It should be noted that in this embodiment, the orientation or positional relationship indicated by "up", "down", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on this application.
[0028] Please refer to Figures 1 to 6This application provides a projector optical engine temperature control cooling device, including an optical engine 1, a cooling chip 3 and a control device. The hot end of the cooling chip 3 is located outside the optical engine 1, and the cold end of the cooling chip 3 is located inside the optical engine 1. A first fan 4 is provided inside the optical engine 1 adjacent to the cold end of the cooling chip 3. A temperature sensor 5 is provided inside the optical engine 1. The first fan 4, the temperature sensor 5 and the cooling chip 3 are all signal connected to the control device.
[0029] It should be noted that the optical engine 1 is the most crucial part of the projector and the main location for image imaging. The optical engine 1 primarily includes a lamp board 6 and a lens screen assembly 7. The lamp board 6 is a circuit board with a light source, providing a stable light output. The lens screen assembly 7 generally includes optical components such as lenses and a screen, used to focus and transmit the light emitted by the light source, enabling the image to be clearly projected onto the screen. The specific structures of the various components within the optical engine 1 can be found in existing technologies, but these are not the focus of this application and will not be elaborated upon here.
[0030] Cooler 3 is a commonly used electronic cooling device, primarily based on the thermoelectric effect for cooling. When direct current passes through a thermocouple composed of P-type and N-type semiconductor materials, the energy level difference of the charge carriers in the materials causes heat absorption and release phenomena at both ends of the thermocouple, respectively. Specifically, one end absorbs heat (cold end), while the other end releases heat (hot end), thereby achieving heat transfer and a cooling effect. Furthermore, a through-hole is provided on one side wall of the optomechanism 1. The cold end of the cooler 3 passes through the through-hole and is located inside the optomechanism 1, while the hot end of the cooler 3 is located outside the optomechanism 1.
[0031] Temperature sensor 5 is installed inside the optical engine 1 to monitor the internal temperature of the optical engine in real time. Preferably, temperature sensor 5 is installed near the lamp board 6. It is understood that, compared with other components inside the optical engine 1, the lamp board 6 has the highest power and is usually the main heat source. Therefore, by installing temperature sensor 5 near the lamp board 6, the temperature change of the lamp board 6 can be directly sensed, thereby providing timely and accurate information on the internal temperature of the optical engine.
[0032] The control device is connected to the first fan 4, temperature sensor 5, and cooling chip 3 via wire signals. The control device inputs a preset temperature and can receive the internal temperature of the optomechanism monitored by temperature sensor 5 in real time. It then controls the voltage and current of cooling chip 3 to achieve the required cooling capacity at the cold end of cooling chip 3, specifically calculated according to the following formula:
[0033] ;
[0034] ;
[0035] .
[0036] In the above formula, The cooling capacity required for cooling Let m be the specific heat capacity of air, and m be the mass of the air inside the optical engine 1. The internal temperature of the optical engine. For preset temperature, This refers to the cooling capacity of the cold end of thermocouple 3. The cooling efficiency of thermocouple 3, The voltage of the thermoelectric cooler 3. This represents the current of the cooling chip 3.
[0037] Therefore, when the projector optical engine temperature control cooling device provided in the above embodiment is working, the temperature sensor 5 can monitor the internal temperature of the optical engine in real time and transmit it to the control device. When the internal temperature of the optical engine exceeds the preset temperature, it indicates that the internal temperature of the optical engine has risen and needs to be cooled. The control device can control the voltage and current of the cooling chip 3 to achieve the required cooling capacity at the cold end of the cooling chip 3. The first fan 4 is turned on, and the first fan 4 accelerates the air flow inside the optical engine 1, so that the air exchanges heat with the cold end of the cooling chip 3 to achieve the cooling effect inside the optical engine 1, ensuring that the internal temperature of the optical engine is within a reasonable temperature range. Moreover, there is no need to reduce the current of the lamp board 6, ensuring the normal brightness of the projector, thereby improving the user experience under high temperature conditions.
[0038] To optimize and improve the cooling efficiency inside the optical engine 1, please refer to the following embodiments based on the above-described embodiments: Figure 6 The first fan 4 has its air intake facing the cold end of the cooling chip 3 and its air outlet facing the lamp panel 6 inside the optical engine 1. In this way, the first fan 4 can draw in air cooled by the cold end of the cooling chip 3 and then blow the cooled air to the lamp panel 6, which can quickly remove the heat from the lamp panel 6. The heated air then flows back to the vicinity of the cold end of the cooling chip 3, thus forming a heat dissipation airflow. Since the lamp panel 6 is the main heat source, the above-mentioned heat dissipation airflow can prevent heat from accumulating inside the lamp panel 6, improve the heat dissipation efficiency of the lamp panel 6, and thus improve the cooling efficiency inside the optical engine 1, ensuring the stable operation of the projector.
[0039] It should be noted that the lens screen assembly 7 also generates heat when the projector is working. There are two main sources of heat: one is that when transmitting the light generated by the lamp panel 6, some of the light is absorbed and converted into heat, causing the temperature of the lens screen assembly 7 to rise; the other is that the lens screen assembly 7 generates heat itself when powered on.
[0040] To further improve the cooling efficiency inside the optical engine 1, please refer to the following embodiments based on the above-described embodiments. Figure 6The hot ends of the first fan 4 and the cooling chip 3 are located on one side of the optical engine 1 from top to bottom, while the lamp board 6 is located on the other side of the optical engine 1. Above the lamp board 6, a lens screen assembly 7 is arranged facing the air outlet of the first fan 4. In this way, the cold air discharged from the air outlet of the first fan 4 can pass through the lens screen assembly 7 and the lamp board 6 in sequence to quickly remove the heat generated by the lens screen assembly 7 and the lamp board 6. Then, the hot air flows to the cold end of the cooling chip 3 for further cooling before being drawn into the air inlet of the first fan 4. This cycle forms an efficient heat dissipation airflow, thereby dissipating heat from the various heat-generating components inside the optical engine 1, and thus more effectively improving the cooling efficiency inside the optical engine 1 and ensuring the stable operation of the projector.
[0041] In one specific embodiment, please refer to Figure 6 The lens screen assembly 7 includes, from top to bottom, a first Fresnel lens 71, a screen 72, a heat-insulating glass 73, a second Fresnel lens 74, and a light chamber 75. The light generated by the light chamber 75 guides the light from the lamp plate 6, which is then processed by the second Fresnel lens 74 and projected onto the screen 72. The screen 72 then processes the projected image through the first Fresnel lens 71 before projecting it onto the lens. The heat-insulating glass 73 effectively insulates the screen 72 from high temperatures. Of course, the lens screen assembly 7 can also employ other structures, and its internal components are not unique.
[0042] It should be noted that the lamp board 6 has a bulb for providing the light source. Currently, to improve the brightness of the projector and meet the requirements for a clear image, the lamp board 6 usually uses high power, with a maximum power of 180W to 300W. Therefore, if the power of the lamp board 6 is too high, the cooling power of the cooling element 3 will not match the power of the lamp board 6. When the projector is working, there may be a situation where the maximum cooling capacity of the cooling element 3 cannot meet the cooling capacity required for the lamp board 6.
[0043] Based on the above embodiments, please refer to Figure 6 The lamp board 6 is connected to the lamp board heat sink 8 that extends out of the optical engine 1, and a second fan 9 is provided near the lamp board heat sink 8.
[0044] Specifically, a lamp plate heat sink 8 is inserted into the bottom of the optical engine 1, and a lamp plate 6 is placed on top of the lamp plate heat sink 8. The bottom of the lamp plate heat sink 8 extends through the bottom of the optical engine 1 and into the interior of the optical engine 1. A second fan 9 is located outside the optical engine 1 adjacent to the lamp plate heat sink 8. In this way, part of the heat generated by the lamp plate 6 is dissipated through convection heat exchange between the first fan 4 and the cold end of the cooling element 3. The other part of the heat generated by the lamp plate 6 is conducted to the lamp plate heat sink 8, and then dissipated through convection heat exchange between the second fan 9 and the outside air. This improves the heat dissipation effect of the lamp plate 6 and effectively ensures that the internal temperature of the optical engine is within a reasonable range. In addition, the second fan 9 is connected to the control device via a wire signal to facilitate precise and timely control of the second fan 9.
[0045] Preferably, the second fan 9 is also positioned near the hot end of the cooling chip 3. In this way, the second fan 9 can not only enhance the convective heat exchange between the outside air and the heat sink 8 of the lamp panel, but also enhance the convective heat exchange between the outside air and the hot end of the cooling chip 3, so as to release the heat inside the optical engine 1 in a timely manner, prevent the cooling chip 3 from overheating, and thus improve the cooling efficiency and stability of the cooling chip 3.
[0046] In this application, the first fan 4 and the second fan 9 can be centrifugal fans or axial fans, etc., and the type is not limited, as long as they can enhance the heat dissipation of the cold end and hot end of the cooling chip 3.
[0047] Understandably, please refer to Figures 1 to 3 The projector includes a housing 2, with the optical engine 1, cooling chip 3, lamp plate heat sink 8, and second fan 9 all housed inside the housing 2. This protects the components from external interference, improving their lifespan and reliability. Furthermore, the housing 2 has a first opening 10 near the hot end of the cooling chip 3 and a second opening 11 near the lamp plate heat sink 8. The second fan 9's intake faces the hot end of the cooling chip 3, and its exhaust faces the lamp plate heat sink 8. This accelerates airflow near the hot end of the cooling chip 3, reducing air pressure in this area. Outside air can then flow through the second opening 11 to the hot end of the cooling chip 3 and be drawn into the second fan 9. The second fan 9 then blows the air to the lamp plate heat sink 8 and finally exhausts it through the second opening 11, providing ventilation inside the housing 2 and achieving convective heat exchange between outside air and the cold end of the cooling chip 3 and the lamp plate heat sink 8.
[0048] For preferred options, please refer to [the following]. Figure 3 The outer shell 2 is a detachable shell consisting of a front shell 21, a bottom shell 23 and an upper shell 22. The front shell 21 is detachably located at the opening on the left side of the upper shell 22, and the bottom shell 23 is detachably located at the opening at the bottom of the upper shell 22, so as to facilitate the disassembly or maintenance of the internal components of the outer shell 2, such as the optical engine 1, the second fan 9 or the cooling chip 3.
[0049] Based on the above embodiments, please refer to Figure 6 The second fan 9 is located directly below the cooling chip 3, and the lamp plate heat sink 8 is located directly below the lamp plate 6. Both the second fan 9 and the lamp plate heat sink 8 are fixed to the bottom of the housing 2. In other words, in the left-right direction of the projector, the first fan 4, the cooling chip 3, and the second fan 9 are arranged from top to bottom on the left side of the projector, while the lens screen assembly 7, the lamp plate 6, and the lamp plate heat sink 8 are arranged from top to bottom on the right side of the projector. This allows for a reasonable and compact arrangement of the components, saving space.
[0050] Based on the above embodiments, please refer to Figure 1 and Figure 2 The first opening 10 and the second opening 11 are located on the opposite left and right sides of the outer casing 2, respectively. This allows outside air to enter from one side of the outer casing 2, pass through the hot end of the cooling chip 3 and the cold plate heat sink in sequence, and then exit from the other side of the outer casing 2. This avoids the first opening 10 and the second opening 11 being too close, which could cause turbulence and eddies in the air inside the outer casing 2, thus forming a stable airflow field and making heat dissipation more uniform and reliable.
[0051] Based on any of the above embodiments, please refer to Figure 4 The cold end of the cooling chip 3 is provided with a cold end heat sink 12, the hot end of the cooling chip 3 is provided with a hot end heat sink 13, and a heat insulation cotton 14 is provided between the hot end of the cooling chip 3 and the hot end heat sink 13.
[0052] In the above embodiment, the cold energy at the cold end of the cooling chip 3 can be quickly conducted to the cold end heat sink 12, and the cold end heat sink 12 dissipates the cold energy into the optical engine 1. At the same time, the heat at the hot end of the cooling chip 3 can be quickly conducted to the hot end heat sink 13, and the hot end heat sink 13 dissipates the heat (i.e. the heat inside the optical engine 1) to the outside of the optical engine 1 in a timely manner, thereby achieving efficient cooling of the cooling chip 3 and improving the cooling efficiency inside the optical engine 1.
[0053] In addition, the heat insulation cotton 14 covers one side of the heat sink 13 facing the hot end of the cooling chip 3 to achieve heat insulation and prevent the loss of cold energy at the cold end of the cooling chip 3, so that the cooling effect of the cooling chip 3 is more significant, thereby improving the cooling efficiency inside the optical engine 1.
[0054] In this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0055] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0056] The above provides a detailed description of the projector optical engine temperature control cooling device provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A projector optical engine temperature control cooling device, characterized in that, The application relates to a light machine (1), a refrigeration sheet (3) and a control device, wherein the hot end of the refrigeration sheet (3) is arranged outside the light machine (1), the cold end of the refrigeration sheet (3) is arranged inside the light machine (1), the inside of the light machine (1) is provided with a first fan (4) adjacent to the cold end of the refrigeration sheet (3), the inside of the light machine (1) is provided with a temperature sensor (5), and the first fan (4), the temperature sensor (5) and the refrigeration sheet (3) are all signal-connected to the control device.
2. The projector light engine temperature control cooling apparatus of claim 1, wherein, The suction port of the first fan (4) faces the cold end of the refrigeration sheet (3), and the blowing port of the first fan (4) faces a lamp panel (6) inside the light machine (1).
3. The projector light engine temperature control cooling apparatus of claim 2, wherein, The first fan (4) and the hot end of the refrigeration sheet (3) are sequentially arranged from top to bottom on one side of the inside of the light machine (1), the lamp panel (6) is arranged on the other side of the inside of the light machine (1), and a lens screen assembly (7) facing the blowing port of the first fan (4) is arranged above the lamp panel (6).
4. The projector light engine temperature control cooling apparatus of claim 2, wherein, The lamp panel (6) is connected with a lamp panel heat dissipation sheet (8) extending out of the inside of the light machine (1), a second fan (9) is arranged adjacent to the lamp panel heat dissipation sheet (8), and the second fan (9) is signal-connected to the control device.
5. The projector light engine temperature control cooling apparatus of claim 4, wherein, The second fan (9) is arranged adjacent to the hot end of the refrigeration sheet (3).
6. The projector light engine temperature control cooling apparatus of claim 5, wherein, The light machine (1), the refrigeration sheet (3), the lamp panel heat dissipation sheet (8) and the second fan (9) are all arranged in the inside of a shell (2), the shell (2) is provided with a first opening (10) adjacent to the hot end of the refrigeration sheet (3), the shell (2) is provided with a second opening (11) adjacent to the lamp panel heat dissipation sheet (8), and the suction port of the second fan (9) faces the hot end of the refrigeration sheet (3), and the blowing port of the second fan (9) faces the lamp panel heat dissipation sheet (8).
7. The projector light engine temperature control cooling apparatus of claim 6, wherein, The second fan (9) is arranged directly below the refrigeration sheet (3), the lamp panel heat dissipation sheet (8) is arranged directly below the lamp panel (6), and the second fan (9) and the lamp panel heat dissipation sheet (8) are both fixed on the bottom end in the inside of the shell (2).
8. The projector light engine temperature control cooling apparatus of claim 7, wherein, The first opening (10) and the second opening (11) are respectively arranged on opposite sides of the shell (2).
9. The projector light engine temperature control cooling apparatus of any one of claims 1 to 8, wherein, The cold end of the refrigeration sheet (3) is provided with a cold end heat dissipation sheet (12), the hot end of the refrigeration sheet (3) is provided with a hot end heat dissipation sheet (13), and heat insulation cotton (14) is arranged between the hot end of the refrigeration sheet (3) and the hot end heat dissipation sheet (13).