CN119087734B - An LCD projector with internal circulation and dual fans in series for heat dissipation - Google Patents
An LCD projector with internal circulation and dual fans in series for heat dissipationInfo
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- CN119087734B CN119087734B CN202411430717.XA CN202411430717A CN119087734B CN 119087734 B CN119087734 B CN 119087734B CN 202411430717 A CN202411430717 A CN 202411430717A CN 119087734 B CN119087734 B CN 119087734B
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- heat dissipation
- heat
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3144—Cooling systems
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- General Physics & Mathematics (AREA)
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Abstract
本发明涉及一种内循环双风扇串联散热的LCD投影机，其包括：投影外壳和安装于投影外壳中的密闭式光机，密闭式光机包括：光机壳体、内循环风机组、散热模块以及外循环风机组；密闭式光机内的第一散热风道的第一端、顶部换热腔、侧部过风腔、第二散热风道、侧部换热腔、中部过风腔、第二通风口、第二容置腔、第一通风口和第一散热风道的第二端依次连通而形成内循环散热通道。本申请通过对散热通道、各风机与散热器的位置设计，获得空间更合理的内循环散热通道，单次循环的风量被串联的第一内循环风机和第二内循环风机分别加速而利用了两次，使得风压和风量加大，内循环散热通道的流场变得相对有序，方便准确的模拟流场，有利于进行更精确的散热设计。
The present invention relates to an LCD projector with internal circulation dual fans connected in series for heat dissipation, comprising: a projection housing and a sealed optical engine installed in the projection housing, the sealed optical engine comprising: an optical engine housing, an internal circulation fan unit, a heat dissipation module, and an external circulation fan unit; a first end of a first heat dissipation duct in the sealed optical engine, a top heat exchange chamber, a side air passage chamber, a second heat dissipation duct, a side heat exchange chamber, a middle air passage chamber, a second vent, a second accommodating chamber, the first vent, and the second end of the first heat dissipation duct are sequentially connected to form an internal circulation heat dissipation channel. The present application obtains a more spatially reasonable internal circulation heat dissipation channel by designing the positions of the heat dissipation channel, each fan, and a radiator. The air volume of a single cycle is accelerated and utilized twice by the first internal circulation fan and the second internal circulation fan connected in series, thereby increasing the wind pressure and air volume, and making the flow field of the internal circulation heat dissipation channel relatively orderly, facilitating and accurately simulating the flow field, and facilitating more accurate heat dissipation design.
Description
Technical Field
The invention relates to the technical field of LCD projectors, in particular to an LCD projector with internal circulation and double fans for heat dissipation in series.
Background
The LCD light machine (i.e. the projection light machine) is the most important component in the LCD projector, and the LCD screen absorbs a lot of heat during the operation of the LCD light machine, so that the LCD screen needs to be forcedly cooled and cooled, and the LCD light machine is mainly divided into two types according to the type of heat dissipation, namely a closed light machine and an open light machine.
The closed type optical machine can effectively prevent dust and pollutants from entering the optical path, so that the influence of the dust on the LCD screen is obviously reduced, the projection equipment can be widely suitable for various use occasions, and the service life of the projection equipment can be greatly prolonged. However, the closed environment brings great difficulty to the heat dissipation of the optical elements inside the optical machine, and how to efficiently bring out the internal heat without damaging the closed space is the key point of the heat dissipation of the optical machine at present.
The existing heat dissipation mode of the closed type optical machine can only transfer heat to the radiator through the internal circulation flow field, then the heat is conducted to the outside through the radiator, and finally the heat is taken away by the external flow field, so that the internal circulation air volume of the optical machine is the key of heat dissipation. In order to ensure compactness and aesthetic appearance of the optical machine structure, the heat dissipating device needs to be arranged around the optical component, and the occupied space is as small as possible, and in this case, a reasonable air duct design is needed to ensure the air quantity. In particular, in the high-brightness model, the structural space is limited, a large-size fan cannot be placed, and a plurality of internal circulation fans are often required to be placed in different gaps to meet the requirements. However, if the air duct is not reasonably designed when the two fans work in the narrow internal circulation flow field at the same time, on one hand, the flow field becomes abnormal and chaotic, so that the internal flow field is difficult to accurately simulate, the heat dissipation design difficulty is increased, on the other hand, the two fans often do negative work locally, the impedance of the fans is increased mutually, and the air quantity is weakened due to excessive noise.
Disclosure of Invention
Based on the above, the present invention aims to overcome the defects of the prior art, and provide an LCD projector with internal circulation and dual fans for heat dissipation in series.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
An LCD projector with internal circulation and double fans for heat dissipation in series comprises a projection shell and a closed optical machine arranged in the projection shell, wherein a plurality of heat dissipation holes are formed in the projection shell, and the closed optical machine comprises an optical machine shell, an internal circulation fan set, a heat dissipation module and an external circulation fan set;
The optical machine shell comprises a top shell, a middle shell and a bottom shell which are sequentially connected from top to bottom, wherein the top shell and the middle shell jointly enclose a first accommodating cavity, the bottom shell and the bottom of the middle shell jointly enclose a second accommodating cavity, a first ventilation opening and a second ventilation opening which are vertically communicated are formed in the bottom of the middle shell, and a partition piece and an imaging module are arranged in the first accommodating cavity;
The imaging module comprises a first lens, an LCD screen and a second lens which are sequentially arranged along the optical axis direction, the first accommodating cavity is divided into a first heat dissipation air channel, a second heat dissipation air channel, a middle air passing cavity, a side heat exchange cavity and a top heat exchange cavity by the first lens, the first heat dissipation air channel and the second heat dissipation air channel are respectively positioned at two opposite sides of the LCD screen, the first heat dissipation air channel is positioned between the LCD screen and the first lens, the second heat dissipation air channel is positioned between the LCD screen and the second lens, the middle air passing cavity is positioned at one side of the second lens opposite to the LCD screen, the side heat exchange cavity and the side air passing cavity are positioned at the side part of the middle air passing cavity, and the top heat exchange cavity is positioned at the top of the middle air passing cavity;
The first end, the top heat exchange cavity, the side part air passing cavity, the second heat exchange cavity, the side part heat exchange cavity, the middle air passing cavity, the second air vent, the second accommodating cavity, the first air vent and the second end of the first heat exchange cavity are sequentially communicated to form an inner circulation heat dissipation channel;
the inner circulation fan unit comprises a first inner circulation fan and a second inner circulation fan, the first inner circulation fan is arranged in the lateral air passing cavity, and the second inner circulation fan is arranged in the second accommodating cavity;
the heat dissipation module comprises a first heat radiator and a second heat radiator, the first heat radiator comprises a first cold end and a first hot end which are connected to conduct heat, the second heat radiator comprises a second cold end and a second hot end which are connected to conduct heat, the first cold end is arranged in the top heat exchange cavity, the second cold end is arranged in the side heat exchange cavity, and the first hot end and the second hot end are both arranged outside the optical machine shell;
The outer circulation fan set up in the ray apparatus casing is outside, outer circulation fan set includes first outer circulation fan, second outer circulation fan and third outer circulation fan, first outer circulation fan is used for right first hot junction heat dissipation, second outer circulation fan is used for right the heat dissipation of second hot junction, third outer circulation fan is used for to setting up the outside electric control board of ray apparatus casing carries out the heat dissipation.
As one implementation mode, the number of the first hot ends and the number of the first external circulation fans are two, the two first hot ends are symmetrically arranged relative to the optical axis direction, the two first external circulation fans are also symmetrically arranged relative to the optical axis direction, and each first external circulation fan correspondingly acts on one first hot end.
As an implementation mode, the sealed optical engine further comprises a light source module, the light source module comprises an LED light source, a light funnel and a light funnel shell, an opening is formed in the side wall of the middle shell, which corresponds to the LCD screen, the light funnel shell is arranged at the opening, the light funnel is arranged in the light funnel shell, a light outlet of the light funnel faces the LCD screen, and a light inlet of the light funnel is arranged in the LED light source.
As an implementation mode, the sealed optical engine further comprises an LED radiator, the LED radiator package is connected to conduct a third cold end and a third hot end of heat, the third cold end is attached to the LED light source, the light funnel housing is formed with a mounting cavity, the first external circulation fan and the third hot end are both mounted in the mounting cavity, and the first external circulation fan is further used for radiating the third hot end.
As one implementation mode, the number of the third hot ends is two, and the third hot ends are in one-to-one correspondence with the first external circulation fans.
As an implementation manner, the second hot end is adjacent to one of the first hot ends, the air flow discharged by the second external circulation fan is sucked by one of the first external circulation fans after passing through the second hot end and one of the first hot ends in sequence, and the air flow discharged by the third external circulation fan is sucked by the other of the first external circulation fans after passing through the electric control board and the other of the first hot ends in sequence.
As one embodiment, the imaging module further comprises a heat insulating glass positioned in the first heat dissipation air duct.
As an implementation manner, the first internal circulation fan, the second internal circulation fan and the third external circulation fan are all vortex fans.
As one implementation mode, the top shell is provided with a mounting opening for mounting and fixing the first cold end.
As one embodiment, the first external circulation fan and the second external circulation fan are both axial flow fans.
According to the sealed optical machine of the LCD projector, through the position design of the heat dissipation channel, each fan and the radiator, the internal circulation heat dissipation channel with more reasonable space is obtained, the first internal circulation fan and the second internal circulation fan are connected in series, so that the air flow circulation of the internal circulation heat dissipation channel is quicker, the advantage of large air quantity is achieved, the flow field of the internal circulation heat dissipation channel can be relatively orderly, the flow field is conveniently and accurately simulated, the more accurate heat dissipation design is facilitated, the heat dissipation efficiency of the sealed optical machine is finally improved, the overall power consumption and the volume of the sealed optical machine are reduced, and the safe and stable operation of the sealed optical machine can be ensured. According to the application, through ingenious matching of the internal circulation heat dissipation channel and the heat dissipation module, the air flow can exchange heat with the heat dissipation module twice in sequence in one circulation, so that the heat exchange efficiency of the internal circulation heat dissipation channel is remarkably improved. In one cycle, the air is subjected to first heat absorption and temperature rise, first heat dissipation and temperature reduction, second heat absorption and temperature rise and second heat dissipation and temperature reduction.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of an LCD projector according to an embodiment of the application;
FIG. 2 is a schematic view of a view angle of a closed optical engine according to an embodiment of the present application;
FIG. 3 is a schematic view of a closed optical engine according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an explosion structure of a sealed optical engine according to an embodiment of the present application;
FIG. 5 is a schematic diagram of an explosion structure of an optical engine housing according to an embodiment of the present application;
FIG. 6 is a schematic view of a part of a closed optical engine according to an embodiment of the present application;
FIG. 7 is a schematic view of a part of air circulation inside a closed optical engine according to an embodiment of the present application;
FIG. 8 is a schematic view of a portion of air circulation inside a closed optical engine according to an embodiment of the present application;
FIG. 9 is a schematic view of a portion of air circulation inside a closed optical engine according to an embodiment of the present application;
reference numerals illustrate:
11. A top shell; 12, middle case, 121, first vent, 122, second vent, 13, bottom case, 14, first accommodation chamber, 141, first heat dissipation air duct, 142, second heat dissipation air duct, 143, middle air passing chamber, 144, side air passing chamber, 145, side heat exchanging chamber, 146, top heat exchanging chamber, 15, second accommodation chamber, 16, partition, 17, electric control board, 21, first lens, 22, heat insulating glass, 23, LCD screen, 24, second lens, 31, first inner circulation fan, 32, second inner circulation fan, 41, first radiator, 411, first cold end, 412, first hot end, 42, second radiator, 421, second cold end, 422, second hot end, 51, first outer circulation fan, 52, second outer circulation fan, 53, third outer circulation fan, 61, LED light source, 62, light funnel, 63, light funnel housing, 631, mounting chamber, 64, LED radiator, 641, third cold end, 642, third cold end, 71, third, reflector, 72, 8, projection lens, 81, projection lens, heat dissipation hole.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible implementations and advantages of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention.
Referring to fig. 2 to 9, the present embodiment provides an LCD projector with internal circulation and dual fans for heat dissipation in series, which includes a projection housing and a sealed air machine installed in the projection housing, wherein a plurality of heat dissipation holes are provided at the projection housing for the sealed air machine to perform external circulation and heat dissipation, and the sealed air machine includes an air machine housing, an internal circulation fan set, a heat dissipation module and an external circulation fan set.
The optical machine shell comprises a top shell 11, a middle shell 12 and a bottom shell 13 which are sequentially connected from top to bottom, wherein the top shell 11 and the middle shell 12 jointly enclose a first accommodating cavity 14, the bottom shell 13 and the bottom of the middle shell 12 jointly enclose a second accommodating cavity 15, a first ventilation opening 121 and a second ventilation opening 122 which are vertically communicated are formed in the bottom of the middle shell 12, and a partition piece 16 and an imaging module are arranged in the first accommodating cavity 14. The top shell 11 is in a plate structure, the middle shell 12 and the bottom shell 13 are both in upward open basin-shaped structures, the top shell 11 covers the opening of the middle shell 12 to jointly enclose a first accommodating cavity 14 with the middle shell 12, and the opening of the bottom shell 13 is abutted to the bottom of the middle shell 12 to jointly enclose a second accommodating cavity 15.
The imaging module includes a first lens 21, an LCD screen 23, and a second lens 24 sequentially arranged along the optical axis direction, where the first lens 21 is a rear fresnel lens, the second lens 24 is a front fresnel lens, and the partition 16 may include a structure such as a partition plate and an LCD mounting bracket, so long as the partition effect can be achieved. The partition 16, the first lens 21, the LCD screen 23, and the second lens 24 together partition the first accommodating chamber 14 into a first heat dissipation air duct 141, a second heat dissipation air duct 142, a middle air passing chamber 143, a side air passing chamber 144, a side heat exchanging chamber 145, and a top heat exchanging chamber 146. The first heat dissipation air channel 141 and the second heat dissipation air channel 142 are respectively located at two opposite sides of the LCD screen 23, the first heat dissipation air channel 141 and the second heat dissipation air channel 142 respectively have a first end and a second end which are opposite, in this embodiment, the air flow in the first heat dissipation air channel 141 flows along the vertical direction, and the air flow in the second heat dissipation air channel 142 flows along the horizontal direction, so the first end of the first heat dissipation air channel 141 is the top end, the second end is the bottom end, the first end of the second heat dissipation air channel 142 is the left end, and the second end is the right end. The middle air passing cavity 143 is located at a side of the second lens 24 opposite to the LCD screen 23, the side heat exchanging cavities 145 and the side air passing cavities 144 are located at sides of the middle air passing cavity 143, and the top heat exchanging cavity 146 is located at a top of the middle air passing cavity 143.
The first end of the first heat dissipation air channel 141, the top heat exchange chamber 146, the side air passing chamber 144, the second heat dissipation air channel 142, the side heat exchange chamber 145, the middle air passing chamber 143, the second air opening 122, the second accommodating chamber 15, the first air opening 121 and the second end of the first heat dissipation air channel 141 are sequentially communicated to form an inner circulation heat dissipation channel. The air flow can circularly flow along the inner circulation heat dissipation channel under the driving of the inner circulation fan group, so that the effective heat dissipation of the LCD screen 23 is realized. Specifically, the internal circulation fan set includes a first internal circulation fan 31 and a second internal circulation fan 32, the first internal circulation fan 31 is disposed in the lateral air-passing cavity 144, the second internal circulation fan 32 is disposed in the second accommodating cavity 15, and the first internal circulation fan 31 and the second internal circulation fan 32 are matched to continuously drive the airflow to circulate in the internal circulation heat dissipation channel. Through the above arrangement, when the air flow continuously circulates in the inner circulation heat dissipation channel, the air flow passes through the first heat dissipation air channel 141 and the second heat dissipation air channel 142 formed at the opposite sides of the LCD screen 23, thereby effectively dissipating heat at the opposite sides of the LCD screen 23, and greatly improving heat dissipation efficiency.
The heat dissipation module comprises a first heat radiator 41 and a second heat radiator 42, the first heat radiator 41 comprises a first cold end 411 and a first hot end 412 which are connected to conduct heat, the second heat radiator 42 comprises a second cold end 421 and a second hot end 422 which are connected to conduct heat, the first cold end 411 is arranged in the top heat exchange cavity 146, the second cold end 421 is arranged in the side heat exchange cavity 145, and the first hot end 412 and the second hot end 422 are both arranged outside the optical machine shell. The first cold end 411 and the second cold end 421 can provide cold sources for the internal circulation heat dissipation channel to realize efficient heat dissipation, and when the air flows through the top heat exchange cavity 146 and the side heat exchange cavity 145, the temperature thereof can be effectively reduced. The top shell 11 of the present embodiment is provided with a mounting opening for mounting and fixing the first cold end 411, so that the first cold end 411 can be located in the top heat exchange cavity 146.
The outer circulation fan set is arranged outside the optical machine shell, the outer circulation fan set comprises a first outer circulation fan 51, a second outer circulation fan 52 and a third outer circulation fan 53, the first outer circulation fan 51 is used for radiating heat of the first hot end 412, the second outer circulation fan 52 is used for radiating heat of the second hot end 422, the third outer circulation fan 53 is used for radiating heat of an electric control board 17 arranged outside the optical machine shell, and the electric control board 17 can be electrically connected with the LCD screen 23 so as to control content displayed by the LCD screen 23. The external circulation fan set dissipates heat from the first hot end 412 and the second hot end 422 outside the optical engine housing, so that the first cold end 411 and the second cold end 421 can be kept at a low temperature, which is beneficial to improving the heat dissipation efficiency.
It will be appreciated that referring to fig. 6-9, wherein the black large arrows in fig. 6-9 are the air circulation tracks of the inner circulation heat dissipation channels, when the sealed optical engine is in operation, the first inner circulation fan 31 and the second inner circulation fan 32 are started to drive the air circulation of the inner circulation heat dissipation channels. For example, as shown in fig. 7, when air is discharged from the air outlet of the first internal circulation fan 31, air enters the second heat dissipation air duct 142 from the first end of the second heat dissipation air duct 142 to carry away heat of the LCD screen 23 and the second lens 24 (when the air temperature rises), then flows into the side heat exchange chamber 145 from the second end of the second heat dissipation air duct 142, heat is first conducted away (when the air temperature falls) by the second cold end 421, then enters the middle air passing chamber 143 and is sucked in by the second internal circulation fan 32 in the second accommodating chamber 15 through the second air vent 122, as shown in fig. 9, 8 and 6, then air is discharged from the first air vent 121 by the second internal circulation fan 32, air enters the first heat dissipation air duct 141 from the second end of the first heat dissipation air duct 141 to carry away heat of the LCD screen 23 and the first lens 21 (when the air temperature rises again), then flows into the top heat exchange chamber 146 from the first end of the first heat dissipation air duct 141, heat is conducted away (when the air temperature falls again) by the first cold end 411 for the second time, and finally enters the side air passing chamber 144 and is sucked in by the second internal circulation fan 31, and is circulated again according to the circulation process.
According to the sealed optical engine of the LCD projector, through the position design of the heat dissipation channel, each fan and the heat radiator, the internal circulation heat dissipation channel with more reasonable space is obtained, the air quantity of single circulation is respectively accelerated by the first internal circulation fan and the second internal circulation fan which are connected in series to be utilized twice, so that the circulating air pressure and the air quantity are increased, the air flow circulation in the internal circulation heat dissipation channel is quicker, the structure of the internal circulation heat dissipation channel and the reasonable design of the fan position enable the flow field of the internal circulation heat dissipation channel to be relatively orderly, the flow field can be conveniently and accurately simulated, the more accurate heat dissipation design is facilitated, the heat dissipation efficiency of the sealed optical engine is finally improved, the integral power consumption and the integral size of the sealed optical engine are reduced, and the safe and stable operation of the sealed optical engine can be ensured. According to the application, through ingenious matching of the internal circulation heat dissipation channel and the heat dissipation module, the air flow can exchange heat with the heat dissipation module twice in sequence in one circulation, so that the heat exchange efficiency of the internal circulation heat dissipation channel is remarkably improved. In one cycle, the air is subjected to first heat absorption and temperature rise, first heat dissipation and temperature reduction, second heat absorption and temperature rise and second heat dissipation and temperature reduction.
Specifically, in the present embodiment, the first heat dissipation air duct 141 is located between the LCD panel 23 and the first lens 21, and the second heat dissipation air duct 142 is located between the LCD panel 23 and the second lens 24. Because the middle air passing cavity 143 is located on the side of the second lens 24 opposite to the LCD screen 23, the second heat dissipation air duct 142 thus arranged may be closer to the middle air passing cavity 143, so that the air flow from the second heat dissipation air duct 142 may flow into the middle air passing cavity 143 more quickly after passing through the side heat exchange cavity 145, and be sucked into the second accommodating cavity 15 by the second internal circulation fan 32 via the second air vent 122, so that the overall layout is more reasonable, and the heat dissipation efficiency is higher.
The two first hot ends 412 and the two first external circulation fans 51 are respectively arranged, the two first hot ends 412 are symmetrically arranged relative to the optical axis direction, the two first external circulation fans 51 are also symmetrically arranged relative to the optical axis direction, and each first external circulation fan 51 correspondingly acts on one first hot end 412. By adopting two first hot ends 412 to exchange heat with the outside air, one first hot end 412 is cooled by one first external circulation fan 51, so that the temperature of the first cold end 411 can be effectively reduced, and the cooling efficiency is improved. And the symmetrical arrangement of the first hot ends 412 can improve the symmetry of the overall structure, so as to improve the space utilization.
Preferably, the sealed optical engine of this embodiment further includes a light source module, the light source module includes an LED light source 61, a light funnel 62 and a light funnel 62 housing, an opening is formed on the middle shell 12 corresponding to the side wall of the LCD screen 23, the light funnel 62 housing is mounted at the opening, the light funnel 62 is disposed in the light funnel 62 housing, a light outlet of the light funnel 62 faces the LCD screen 23, and a light inlet of the light funnel 62 is disposed in the LED light source 61. The imaging module further includes a heat insulating glass 22 located in the first heat dissipation air duct 141. The sealed optical engine further comprises a projection module, the projection module comprises a reflector 71 and a projection lens 72, and the reflector 71 is arranged in the middle air passing cavity 143 to reflect light rays emitted by the second lens 24 to the projection lens 72. The light emitted from the LED light source 61 passes through the light funnel 62, the first lens 21, the insulating glass 22, the LCD panel 23, the second lens 24, and the reflecting mirror 71 in this order, and then is emitted from the projection lens 72, thereby forming a projection image.
Preferably, the sealed optical engine of this embodiment further includes an LED radiator 64, where the LED radiator 64 includes a third cold end 641 and a third hot end 642 connected to conduct heat, and the third cold end 641 is attached to the LED light source 61 to radiate heat of the LED light source 61, so as to effectively ensure normal operation of the LED light source 61 and prolong the service life of the LED light source 61. The light funnel 62 housing is formed with a mounting cavity 631, the first external circulation fan 51 and the third hot end 642 are both mounted in the mounting cavity 631, and the first external circulation fan 51 is further configured to dissipate heat from the third hot end 642. This can improve the utilization rate of the first external circulation fan 51 and fully exert its performance. Wherein the first hot end 412 and the third hot end 642 are respectively located at two opposite sides of the first external circulation fan 51. Thus, when the first external circulation fan 51 is operated, air may be driven to flow through the first hot end 412 and the third hot end 642 while radiating heat therefrom.
Specifically, in this embodiment, the number of the third hot ends 642 is two and corresponds to the first external circulation fans 51 one by one, so that the heat dissipation efficiency and the symmetry of the overall structure can be improved, and the space utilization rate can be improved.
In this embodiment, the first cold end 411 and the first hot end 412 are connected by a heat conducting tube to conduct heat, the second cold end 421 and the second hot end 422 are integrally arranged to conduct heat, and the third cold end 641 and the third hot end 642 are also connected by a heat conducting tube to conduct heat. The first cold end 411, the first hot end 412, the second cold end 421, the second hot end 422, the third cold end 641 and the third hot end 642 are all structures formed by adopting a plurality of heat dissipation fins to be arranged at intervals.
Preferably, the second hot end 422 is disposed adjacent to one of the first hot ends 412, the air flow discharged from the second external circulation fan 52 is sucked by one of the first external circulation fans 51 after passing through the second hot end 422 and one of the first hot ends 412 in sequence, and the air flow discharged from the third external circulation fan 53 is sucked by the other of the first external circulation fans 51 after passing through the electric control board 17 and the other of the first hot ends 412 in sequence. The arrangement ensures that the airflow flowing direction outside the optical engine shell is smooth and reasonable, and the air heat exchange efficiency outside the optical engine shell can be improved, thereby improving the heat dissipation efficiency.
In this embodiment, the first inner circulation fan 31, the second inner circulation fan 32, and the third outer circulation fan 53 are all vortex fans. The first external circulation fan 51 and the second external circulation fan 52 are both axial flow fans, and different types of fans are arranged in different manners, so that the arrangement is beneficial to making the overall structural design more reasonable.
The LCD projector of the present embodiment includes a projection housing 8 and the hermetic optical engine of the present embodiment mounted in the projection housing 8, and a plurality of heat dissipation holes 81 are provided at the projection housing 8. The projector of the closed optical engine is favorable for miniaturization design, and has good heat dissipation effect and high sealing performance.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (10)
1. The LCD projector with the internal circulation double fans for heat dissipation in series is characterized by comprising a projection shell and a closed type optical machine arranged in the projection shell, wherein a plurality of heat dissipation holes are formed in the projection shell, and the closed type optical machine comprises an optical machine shell, an internal circulation fan set, a heat dissipation module and an external circulation fan set;
The optical machine shell comprises a top shell, a middle shell and a bottom shell which are sequentially connected from top to bottom, wherein the top shell and the middle shell jointly enclose a first accommodating cavity, the bottom shell and the bottom of the middle shell jointly enclose a second accommodating cavity, a first ventilation opening and a second ventilation opening which are vertically communicated are formed in the bottom of the middle shell, and a partition piece and an imaging module are arranged in the first accommodating cavity;
The imaging module comprises a first lens, an LCD screen and a second lens which are sequentially arranged along the optical axis direction, the first accommodating cavity is divided into a first heat dissipation air channel, a second heat dissipation air channel, a middle air passing cavity, a side heat exchange cavity and a top heat exchange cavity by the first lens, the first heat dissipation air channel and the second heat dissipation air channel are respectively positioned at two opposite sides of the LCD screen, the first heat dissipation air channel is positioned between the LCD screen and the first lens, the second heat dissipation air channel is positioned between the LCD screen and the second lens, the middle air passing cavity is positioned at one side of the second lens opposite to the LCD screen, the side heat exchange cavity and the side air passing cavity are positioned at the side part of the middle air passing cavity, and the top heat exchange cavity is positioned at the top of the middle air passing cavity;
The first end, the top heat exchange cavity, the side part air passing cavity, the second heat exchange cavity, the side part heat exchange cavity, the middle air passing cavity, the second air vent, the second accommodating cavity, the first air vent and the second end of the first heat exchange cavity are sequentially communicated to form an inner circulation heat dissipation channel;
the inner circulation fan unit comprises a first inner circulation fan and a second inner circulation fan, the first inner circulation fan is arranged in the lateral air passing cavity, and the second inner circulation fan is arranged in the second accommodating cavity;
the heat dissipation module comprises a first heat radiator and a second heat radiator, the first heat radiator comprises a first cold end and a first hot end which are connected to conduct heat, the second heat radiator comprises a second cold end and a second hot end which are connected to conduct heat, the first cold end is arranged in the top heat exchange cavity, the second cold end is arranged in the side heat exchange cavity, and the first hot end and the second hot end are both arranged outside the optical machine shell;
The outer circulation fan set up in the ray apparatus casing is outside, outer circulation fan set includes first outer circulation fan, second outer circulation fan and third outer circulation fan, first outer circulation fan is used for right first hot junction heat dissipation, second outer circulation fan is used for right the heat dissipation of second hot junction, third outer circulation fan is used for to setting up the outside electric control board of ray apparatus casing carries out the heat dissipation.
2. The internally circulating dual fan series heat dissipating LCD projector of claim 1, wherein:
The two first hot ends and the two first external circulation fans are symmetrically arranged relative to the optical axis direction, and each first external circulation fan correspondingly acts on one first hot end.
3. The internally circulating dual fan series heat dissipating LCD projector of claim 2, wherein:
The sealed optical engine further comprises a light source module, the light source module comprises an LED light source, a light funnel and a light funnel shell, an opening is formed in the side wall of the middle shell, corresponding to the LCD screen, the light funnel shell is arranged at the opening, the light funnel is arranged in the light funnel shell, a light outlet of the light funnel faces the LCD screen, and a light inlet of the light funnel is arranged in the LED light source.
4. The internally circulating dual fan series heat dissipating LCD projector of claim 3, wherein:
the sealed optical engine further comprises an LED radiator, the LED radiator is connected with a third cold end and a third hot end for conducting heat, the third cold end is attached to the LED light source, the light funnel shell is provided with a mounting cavity, the first outer circulating fan and the third hot end are all mounted in the mounting cavity, and the first outer circulating fan is further used for radiating heat from the third hot end.
5. The internally circulating dual fan series heat sink LCD projector of claim 4, wherein:
The number of the third hot ends is two, and the third hot ends are in one-to-one correspondence with the first external circulation fans.
6. The internally circulating dual fan series heat dissipating LCD projector of claim 2, wherein:
The second hot end is adjacent to one of the first hot ends, air flow discharged by the second external circulation fan is sucked by one of the first external circulation fans after passing through the second hot end and one of the first hot ends in sequence, and air flow discharged by the third external circulation fan is sucked by the other of the first external circulation fans after passing through the electric control board and the other of the first hot ends in sequence.
7. The internally circulating dual fan series heat dissipating LCD projector of claim 1, wherein:
the imaging module further comprises heat insulation glass positioned in the first heat dissipation air duct.
8. The internal circulation dual fan series heat sink LCD projector according to any of claims 1-7, wherein:
The first internal circulation fan, the second internal circulation fan and the third external circulation fan are all vortex fans.
9. The internally circulating dual fan series heat sink LCD projector of claim 8, wherein:
the top shell is provided with a mounting opening for mounting and fixing the first cold end.
10. The internally circulating dual fan series heat sink LCD projector of claim 9, wherein:
the first external circulation fan and the second external circulation fan are both axial flow fans.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411430717.XA CN119087734B (en) | 2024-10-14 | 2024-10-14 | An LCD projector with internal circulation and dual fans in series for heat dissipation |
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| CN202411430717.XA CN119087734B (en) | 2024-10-14 | 2024-10-14 | An LCD projector with internal circulation and dual fans in series for heat dissipation |
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| CN119087734B true CN119087734B (en) | 2025-09-05 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115047701A (en) * | 2022-07-02 | 2022-09-13 | 深圳市华米未来科技有限公司 | High-efficient radiating dustless projecting apparatus |
| CN117539115A (en) * | 2023-12-27 | 2024-02-09 | 广州瑞格尔电子有限公司 | Double-engine heat radiator for closed optical machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0868978A (en) * | 1994-08-26 | 1996-03-12 | Casio Comput Co Ltd | LCD projector |
| JP2000081667A (en) * | 1998-06-30 | 2000-03-21 | Seiko Epson Corp | Projection display device |
| JP3992464B2 (en) * | 2001-08-28 | 2007-10-17 | 三洋電機株式会社 | Optical component cooling structure of projector device |
| JP2003337380A (en) * | 2002-05-21 | 2003-11-28 | Sharp Corp | Projection display device |
| JP2007065623A (en) * | 2006-06-22 | 2007-03-15 | Sharp Corp | Light source device, lamp unit, and projection-type image display device |
| KR20080022385A (en) * | 2006-09-06 | 2008-03-11 | 삼성전자주식회사 | Projector |
| JP5898526B2 (en) * | 2012-02-29 | 2016-04-06 | 日立マクセル株式会社 | LCD projector |
| CN212873178U (en) * | 2020-10-22 | 2021-04-02 | 蒋元俊 | Double-fan LCD projector |
| CN220983707U (en) * | 2023-07-18 | 2024-05-17 | 深圳市环科精密制造有限公司 | Projector optical machine and projector |
| CN220820452U (en) * | 2023-09-02 | 2024-04-19 | 苏州轰天炮光电科技有限公司 | Short-distance heat dissipation air duct structure of projector |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115047701A (en) * | 2022-07-02 | 2022-09-13 | 深圳市华米未来科技有限公司 | High-efficient radiating dustless projecting apparatus |
| CN117539115A (en) * | 2023-12-27 | 2024-02-09 | 广州瑞格尔电子有限公司 | Double-engine heat radiator for closed optical machine |
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