CN205982964U - Projection arrangement and cooling system thereof - Google Patents

Abstract

A heat dissipation system includes an air duct assembly, a first fan, and a first heating element, and the first air duct is formed in the air duct assembly. The first fan is arranged in the first air duct, the first heating element is arranged outside the first air duct, and the airflow discharged by the first fan is substantially perpendicular to the main heat generated by the first heating element center of the face. The utility model also provides a projection device using the above heat dissipation system. In the heat dissipation system of the present invention, the cold air absorbed by the first fan directly dissipates heat at the center of the first heating element, thereby improving the heat dissipation efficiency of the first heating element.

Description

Projection device and its cooling system

technical field

The utility model relates to the technical field of projection, in particular to a cooling system and a projection device using the cooling system.

Background technique

With the development of science and technology, projection devices (such as projectors) are more and more widely used in life and work. A projection device is a high-power device that converts electrical energy into light energy. Its composition includes multiple heat sources that generate a lot of heat during work, such as light sources, color wheels, and light modulators.

Among them, a light modulator (such as a DMD light modulator) is an important digital optical device currently used in a projector, which forms a picture by performing image modulation on light emitted by a light source through a color wheel or the like. However, when the light emitted by the light source in the projector is irradiated on the light modulator through the color wheel, etc., the temperature of the light modulator will rise, and at the same time, a large number of control circuits integrated on the light modulator will also generate considerable heat during operation. As a result, the operating temperature of the light modulator increases. Excessively high operating temperature will reduce the service life of the optical modulator, and may even cause damage to the optical modulator. Therefore, it is necessary to set up a cooling system to dissipate heat and cool down the optical modulator to reduce the operating temperature of the optical modulator to ensure that the optical modulator is within a set operating temperature to ensure its performance and service life.

In the existing projection device, the heat sink thermally connected with the light modulator is mainly arranged in an airflow channel, and the first suction fan and the first exhaust fan are respectively arranged at both ends of the airflow channel. The heat generated on the modulator is transferred to the heat sink, and the airflow circulating in the airflow channel flows through the heat sink to take away the heat generated by the heat sink, thereby taking away the heat generated by the light modulator, realizing the Heat dissipation of the light modulator. However, in the existing heat dissipation method, the first fan is far away from the central position of the light modulator, and the airflow in the airflow channel flows out through the first end, the central position and the second end of the heat sink in sequence. , that is, the airflow in the airflow channel sequentially dissipates heat to the first end, the central position, and the second end of the optical modulator, which cannot directly and effectively dissipate heat to the central position of the optical modulator, so that the center of the optical modulator The operating temperature at the location is higher, reducing the lifetime of the light modulator.

Utility model content

In view of the above situation, it is necessary to provide a heat dissipation system with high heat dissipation efficiency and a projection device using the heat dissipation system.

A heat dissipation system includes an air channel assembly, a first fan, and a first heating element, and the first air channel is formed in the air channel assembly. The first fan is arranged in the first air duct, the first heating element is arranged outside the first air duct, and the airflow discharged by the first fan is substantially perpendicular to the main heat generated by the first heating element center of the face.

As a preferred solution, the heat dissipation system further includes a heat dissipation assembly, the heat dissipation assembly is arranged between the first heating element and the first fan and is thermally connected to the main heating surface of the first heating element, The airflow discharged by the first fan flows into the heat dissipation assembly, and is directed to flow out from two airflow outflow directions different from the inflow direction of the airflow through the heat dissipation assembly.

As a preferred solution, the outflow directions of the two airflows are set in opposite directions, and are respectively set approximately perpendicular to the inflow directions of the airflows.

As a preferred solution, the heat dissipation assembly includes a plurality of heat dissipation fins arranged in parallel, an airflow channel is formed between every two adjacent heat dissipation fins, and a straight line extending along the direction in which the airflow flows into the heat dissipation device is approximately perpendicular to the In the plane where the plurality of heat dissipation fins are located, the airflow flowing into the heat dissipation assembly is guided through the plurality of airflow channels to flow out from two opposite directions extending along the heat dissipation fins.

As a preferred solution, the heat dissipation system is further provided with a second air duct and a third air duct through which the two airflows flowing out of the heat dissipation assembly respectively circulate.

As a preferred solution, the heat dissipation system further includes a restrictor plate, the restrictor plate is arranged at the air inlet of the first air channel, and is used to prevent the Airflow is drawn into the first air duct.

As a preferred solution, the air duct assembly includes a plurality of interconnected plates, side walls of the plurality of plates define the first air duct.

As a preferred solution, at least one plate is made of heat-conducting material, and the heat dissipation system further includes a second heating element thermally connected to the plate made of heat-conducting material.

As a preferred solution, the plurality of boards are made of heat insulating material.

A projection device includes any one of the heat dissipation systems mentioned above.

In the cooling system of the present invention, by setting the first fan which can generate airflow roughly facing the central position of the first heating element, the cold air absorbed by the first fan is directly radiated against the central position of the first heating element, thereby improving the heat dissipation The heat dissipation efficiency of the first heating element.

Description of drawings

FIG. 1 is a structural diagram of an optical path of a projection device according to an embodiment of the present invention.

Fig. 2 is a partial structural diagram of the heat dissipation system according to the first embodiment of the present invention.

FIG. 3 is a partial structural schematic diagram of a heat dissipation system according to a second embodiment of the present invention.

Description of main component symbols

projection device 100 cooling system 200 light source 10 color wheel 20 optical relay system 30 light modulator 40 projection lens unit 50 channel component 60 Board 61 The first airway 62 Inlet 621 air outlet 623 first fan 63 Cooling components 64 cooling fins 642 second fan 65 control board bracket 66 Restrictor plate 72 second air duct 73 second heating element 74 third heating element 75 Fourth heating element 76 third air duct 77 third fan 78

The following specific embodiments will further illustrate the utility model in conjunction with the above-mentioned accompanying drawings.

detailed description

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings.

In the following description, a lot of specific details have been set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways that are different from those described here, and those skilled in the art can do so without violating the connotation of the utility model. Under the circumstances, similar applications are made, so the utility model is not limited by the specific embodiments disclosed below.

Secondly, the utility model is described in detail in combination with schematic diagrams. When describing the embodiments of the utility model in detail, for the convenience of explanation, the cross-sectional view showing the structure of the device will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it will not be described here. The protection scope of the utility model should be limited. In addition, the three-dimensional space dimensions of length, width and depth should be included in actual production.

It should be noted that "approximately perpendicular" and "approximately opposite" used in the embodiments of the present utility model and the appended claims refer to the intersection angle being approximately 90°, for example, the intersection angle is 90±5°, 90° ±10°.

The following describes in detail through implementation.

Please refer to FIG. 1 , a projection device 100 provided by an embodiment of the present invention includes a light source 10 , a color wheel 20 , an optical relay system 30 , a light modulator 40 and a projection lens unit 50 .

The light source 10 is used to emit excitation light, such as blue excitation light, and the light source 10 may be a blue laser light source (or blue laser). In an alternative embodiment, the light source 10 can also be a light source of other colors, not limited to a blue light source. For example, the light source 10 can be an ultraviolet laser light source (or ultraviolet laser), thereby emitting ultraviolet excitation Light. Further, the light source 10 is preferably a semiconductor laser light source for providing high-brightness excitation light.

The color wheel 20 is disposed on the optical path of the excitation light emitted by the light source 10 for receiving the excitation light emitted by the light source 10 and emitting light of the at least two colors. The color wheel 20 may be a disk-shaped color wheel for sequentially emitting the at least two colors of light (such as red, green and blue light, yellow and blue light, etc.). Specifically, the color wheel 20 may be provided with a fluorescent material, and the fluorescent material may generate another or two colors of stimulated light (such as red, green, yellow, etc.) when excited by the excitation light, The color wheel can thus emit light of at least two colors.

In this embodiment, the color wheel 20 is a transmissive color wheel, that is, the light from the light source 10 is incident on one side of the color wheel 20, and the other side of the color wheel 20 emits the at least two color light. Certainly, in an alternative implementation manner, the color wheel may also be a reflective color wheel 20 .

The light relay system 30 is arranged on one side of the light source 10, and is used to homogenize, collect and shape the light emitted by the color wheel 20 (for example, make the projected spot of the light beam conform to a predetermined shape) and other processes. Provided to the light modulator 40.

The light modulator 40 is arranged between the light relay system 30 and the projection lens unit 50, and is used for adjusting the light beam incident to the light modulator 40 through the light relay system 30 according to the input image data. Image modulation is performed to generate modulated image light, and the modulated image light is transmitted to the projection lens unit 50 . The light modulator 40 may include a reflective light modulator or a transmissive light modulator. Wherein, the light beam from the light source 10 is incident on the front surface of the reflective light modulator, and is reflected and transmitted from the reflective light modulator to the projection lens unit 50; or, the light beam from the light source 10 is incident on the projection light modulator on the front surface of the modulator, and transmit to the projection lens unit 50 through the projection light modulator. The reflective light modulator includes a reflective light valve (Digital Micromirror Device, DMD), which includes a plurality of tiny mirrors with the same number of pixels, and changes the angle of each mirror electronically or mechanically to enter the reflection The light beam is modulated and reflected from the front surface of the light valve. In this embodiment, the light modulator 40 is a reflective light valve, that is, a DMD light modulator.

The projection lens unit 50 is used to amplify the incident modulated image light, and project the modulated image light to a screen (not shown) to display a predetermined image.

When the light modulator 40 is driven, it generates heat by itself. Meanwhile, in addition to self-heating, reflective optical modulators generate heat due to reflection losses, and projective optical modulators generate heat due to transmission losses.

Please also refer to FIG. 2 , the heat dissipation system 200 provided adjacent to the light modulator 40 according to the first embodiment of the present invention. The heat dissipation system 200 is used to dissipate heat from the light modulator 40 , and other heating elements of the projection device 100 . Specifically, the heat dissipation system 200 includes a channel assembly 60 , a first fan 63 , a heat dissipation assembly 64 and a second fan 65 .

The channel assembly 60 includes a plurality of plates 61 interconnected. It can be understood that the plurality of plate parts 61 can be integrally formed to form the channel assembly 60 , or can be formed separately and then assembled to form the channel assembly 60 . At least one board 61 is installed on the control board bracket 66 . The control board bracket 66 is used as a mounting bracket for the control board of the projection device 100 . It can be understood that, in other embodiments, the channel assembly 60 can be installed on other internal brackets of the projection device 100 . A first air channel 62 is formed in the channel assembly 60 , in other words, the side walls of the plurality of plates 61 define the first air channel 62 . The first air channel 62 has an air inlet 621 and an air outlet 623 . The first fan 63 is disposed at the air outlet 623 . It can be understood that the first fan 63 may be directly arranged on the plate 61 of the first air duct 62 , or may be arranged on an internal support frame (not shown) of the projection device 100 . It can be understood that, in other embodiments, other internal components of the projection device 100, such as circuit boards, electronic components, etc., can also be arranged on the board 61, so that the heat dissipation system 200 can cool the other internal components of the projection device 100. Heat dissipation.

In the first air passage 62, the external cold air is sucked into the first air passage 62 from the air inlet 621 by the pressure (negative pressure) generated by the first fan 63, and is discharged by the first fan 63 from the air outlet 623 with the first wind. Road 62 off. Specifically, in the illustrated embodiment, the first air channel 62 is substantially ┐-shaped, and is used to guide and form an air flow substantially perpendicular to the heat dissipation assembly 64 . It can be understood that, in other embodiments, the shape of the first air channel 62 is not limited. The plurality of boards 61 are made of heat insulating material (such as insulating plastic material) for preventing the heat outside the first air duct 62 from being transferred to the cold air in the first air duct 62 through the air duct wall.

The heat dissipation assembly 64 is disposed outside the first air duct 62 and is located below the airflow of the air outlet of the first fan 63 . Specifically, in the illustrated embodiment, the air outlet of the first fan 63 is also facing the center of the heat dissipation assembly 64 . It can be understood that, in other embodiments, the central position of the heat dissipation assembly 64 may not face the air outlet of the first fan 63 as long as the heat dissipation assembly 64 is located below the airflow of the air outlet of the first fan 63 , and the airflow generated by the first fan 63 is approximately directly (or approximately perpendicular) to the center of the heat dissipation assembly 64, for example, the first fan 63 is arranged in the middle of the first air duct 62 , and the airflow exhausted by the first fan 63 is roughly facing or vertically flowing toward the center of the heat dissipation assembly 64 .

The heat dissipation assembly 64 includes a plurality of heat dissipation fins 642 arranged in parallel, and there is a predetermined gap between every two adjacent heat dissipation fins 642 to form an airflow channel. In this embodiment, the heat dissipation fins 642 are arranged in a strip shape, and a plurality of heat dissipation fins 642 are arranged in parallel to form a rectangle. A straight line extending along the flow direction of the cool air discharged from the air outlet of the first fan 63 is substantially perpendicular to the plane where the plurality of cooling fins 642 arranged in parallel are located. The cold air discharged from the air outlet of the first fan 63 is blown substantially vertically to the center position of the plane where the plurality of cooling fins 642 of the heat dissipation assembly 64 are located, 642 is split into two airflows at approximately the central position to be discharged, and the outflow directions of the two airflows are respectively approximately perpendicular to the inflow directions of the airflow into the heat dissipation assembly 64 . The two airflows flow in two opposite directions, that is, the two opposite directions in which the heat dissipation fins 642 extend along their length, and are discharged out of the heat dissipation system under the action of the pressure (negative pressure) generated by the second fan 65. 200 away. It can be understood that, in other embodiments, the second fan 65 can be omitted, and the two airflows split by the heat dissipation assembly 64 can also be discharged out of the heat dissipation system 200 under the action of the first fan 63 .

The heat dissipation component 64 is also thermally connected with the first heating element. In this implementation manner, the first heating element is a light modulator 40 . The air outlet of the first fan 63 is roughly facing the center of the main heating surface of the first heating element. It can be understood that the air outlet of the first fan 63 may not face the center of the main heating surface of the first heating element, as long as the airflow discharged by the first fan 63 is approximately perpendicular to the main heating surface of the first heating element. The airflow at the center of the surface is enough. For example, the first fan 63 is arranged in the middle of the first air duct 62 to generate an airflow that is approximately right or perpendicular to the center of the main heating surface of the first heating element. The heat generated by the first heating element is transferred to the heat dissipation assembly 64 , and the heat generated by the first heating element is discharged out of the heat dissipation system 200 by the two airflows split by the heat dissipation assembly 64 . Since the air exhaust port of the first fan 63 is roughly facing the center of the main heating surface of the first heating element, the heat generated at the center of the main heating surface of the first heating element is directly transferred to the heat sink. The assembly 64 is quickly taken away by the airflow driven by the first fan 63, thereby improving the heat dissipation efficiency to the center of the main heating surface of the first heating element.

Please refer to FIG. 3 , the heat dissipation system 200 provided in the second embodiment of the present invention has substantially the same structure as the projection device in the first embodiment. The difference is that the cooling system 200 further includes a restrictor plate 72 , a second heating element 74 , a third heating element 75 , a fourth heating element 76 and a third fan 78 . Preferably, the heating value of the third heating element 75 and the fourth heating element 76 are both greater than the heating value of the first heating element. At least one plate 61 is made of thermally conductive material, such as silicon, silver, copper, gold and aluminum, and the like. The plate 61 made of heat-conducting material is thermally connected to a second heating element 74 , and the second heating element 74 is, for example, a circuit board. The heat dissipation system 200 is also provided with a second air duct 73 and a third air duct 77. Two streams of air flow split by the heat dissipation assembly 64, one of which is discharged out of the heat dissipation system 200 through the second air duct 73, and the other is The air flows out of the cooling system 200 through the third air channel 77 . The second fan 65 and the third heating element 75 are arranged in the second air duct 73 , under the action of the second fan 65 , the airflow flowing through the second air duct 73 discharges the heat generated by the third heating element 75 out of the cooling system 200 outside. The third fan 78 and the fourth heating element 76 are arranged in the third air passage 77, and under the action of the third fan 78, the airflow flowing through the third air passage 77 discharges the heat generated by the fourth heating element 76 out of the projection device 100. outside. The restrictor plate 72 is arranged at the air inlet 621 of the first air duct 62, and it bends and extends toward the second air duct 73 to prevent the gas flowing out from the second air duct 73 or the third air duct 77 from being directly inhaled into the second air duct 77. In the first air duct 62 , and the area of the air inlet 621 is increased, so that the outside cold air can be better introduced into the first air duct 62 .

It can be understood that, in other embodiments, the heat dissipation assembly 64 can be omitted, and the airflow discharged by the first fan 63 flows approximately vertically to the center of the main heating surface of the first heating element, so as to directly The central position of the first heating element is used to dissipate heat.

It can be understood that, in other embodiments, the two airflows split by the heat dissipation assembly 64 may flow out in two directions that are not opposite. For example, the heat dissipation assembly 64 includes a plurality of heat dissipation fins 642 arranged in parallel, so The heat dissipation fins 642 are V-shaped.

In the cooling system 200 of the present utility model, by setting the first fan 63 roughly facing the center of the main heating surface of the first heating element, the cold air absorbed by the first fan 63 is directly aimed at the main heating surface of the first heating element. The heat dissipation is carried out at the central position of the first heating element to improve the heat dissipation efficiency of the first heating element. At the same time, since the airflow direction of the airflow discharged from the first air duct 62 is approximately perpendicular to the plane where the plurality of heat dissipation fins 642 arranged in parallel in the heat dissipation assembly 64 are located, and an airflow is formed between two adjacent heat dissipation fins 642 channel, so that the airflow discharged from the first air passage 62 flows approximately vertically to the center position of the plane where the plurality of heat dissipation fins 642 are located, and the airflow flowing into the heat dissipation assembly 64 is directed by the center position of the plane where the plurality of heat dissipation fins 642 are located. Along the extension direction of the airflow channel, the flow is divided into two opposite airflows and flow out of the heat dissipation assembly 64, which further improves the heat dissipation efficiency of the first heating element. Furthermore, the third heating element 75 and the fourth heating element 76 are arranged in the second air passage 73 and the third air passage 77 respectively, which simplifies the structure of the heat dissipation system 200 while improving the overall heat dissipation efficiency of the heat dissipation system 200 .

The above embodiments are only used to illustrate the technical solution of the utility model and not to limit it. In addition, it is known that the cooling system provided by the utility model can also be referred to for heat dissipation of heating elements in other types of devices. Although the utility model has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the utility model.

Claims (10)

1. a kind of cooling system, it includes ducting assembly, the first fan and first heating element, is formed in described ducting assembly Have the first air channel it is characterised in that：Described first fan is arranged in described first air channel, and described first heating element is arranged at Outside described first air channel, and the air-flow of described first fan discharge is approximately perpendicular to the main heating face of described first heating element Center.

2. cooling system as claimed in claim 1 it is characterised in that：Described cooling system also includes radiating subassembly, described scattered Hot assembly is arranged between described first heating element and described first fan and the main heating with described first heating element Fever sensation of the face connects, and the air-flow that described first fan is discharged flows in described radiating subassembly, and never guides via described radiating subassembly Two air-flows being same as the inflow direction of air-flow flow out direction outflow.

3. cooling system as claimed in claim 2 it is characterised in that：Described two air-flows flow out setting in opposite direction, and point Not setting substantially vertical with the inflow direction of described air-flow.

4. cooling system as claimed in claim 3 it is characterised in that：Described radiating subassembly includes the multiple radiatings be arrangeding in parallel Fin, is often formed with gas channel between two neighboring radiating fin, and the direction flowing into described heat abstractor along air-flow extends Straight line is approximately perpendicular to the plane that the plurality of radiating fin is located, and the air-flow in the described radiating subassembly of inflow is via multiple air-flows Passage guiding is flowed out from two rightabouts extending along described radiating fin.

5. cooling system as claimed in claim 2 it is characterised in that：Described cooling system is additionally provided with for via described radiating The second air channel and the 3rd air channel that two strands of air-flows that assembly flows out circulate respectively.

6. cooling system as claimed in claim 5 it is characterised in that：Described cooling system also includes current limiting plate, described current limliting Plate is arranged at the air inlet in described first air channel, and the air-flow for preventing from flowing out via described second air channel or the 3rd air channel is inhaled Enter in described first air channel.

7. cooling system as claimed in claim 1 it is characterised in that：Described ducting assembly includes interconnective multiple plate Part, the side wall of the plurality of plate defines described first air channel.

8. cooling system as claimed in claim 7 it is characterised in that：At least one plate is made from a material that be thermally conductive, described scattered Hot systems also include the mutually hot linked second heatiing element of plate made with Heat Conduction Material.

9. cooling system as claimed in claim 7 it is characterised in that：The plurality of plate is made up of adiabator.

10. a kind of projection arrangement, it includes the cooling system any one of claim 1-9 item.