CN204287710U - A kind of projector - Google Patents

Abstract

In order to overcome the problems of poor heat dissipation and high cost of projectors in the prior art, the utility model provides a projector, which includes a casing, an optical machine, a fan, a first heat dissipation fin, a circuit board and a partition; the bottom of the casing has a drawer There are air holes on the side of the shell; there are first air inlets and second air inlets on the upper and lower surfaces of the fan; there are first air outlets and second air outlets on the side of the fan; The second air outlet is facing the exhaust hole; the light engine and the first heat dissipation fin are fixed to each other; the first heat dissipation fin is located between the light engine and the fan, and is adjacent to the first air outlet; the first heat dissipation fin is facing the row at the same time The air hole; the circuit board is facing the first air inlet; the partition is located between the optical machine and the fan; the partition extends from the optical machine to the fan, and the part adjacent to the partition and the fan is located on the side of the first air outlet away from the exhaust hole side; the first cooling fin is located between the partition plate and the exhaust hole. The projector provided by the utility model has good cooling effect and low cost.

Description

a projector

technical field

The utility model relates to a projector.

Background technique

At present, with the increasing function and complexity of electronic products, the power consumption continues to increase, and the power loss is usually converted into a certain amount of heat energy. The miniaturization requirements of electronic products also cause the heat flux density of the product (that is, the heat transferred through the unit heat transfer area per unit time) to rise sharply, resulting in a rapid increase in the temperature of electronic products, affecting the reliability and service life of electronic products.

In projectors, the problem of sharp rise in heat flux is particularly prominent. According to the imaging principle of the projector, the DMD (Digital Micromirror Device, Digital Micromirror Device) will reflect the light to the screen to form an image according to the requirements of the signal after the trichromatic light emitted by the light source module. In order to obtain high lumen brightness output, it must be realized by a high-power light source module, especially for projectors that use LED (Light-Emitting Diode) as the light source module. The heat generated by green and red LEDs is high. Heat dissipation. Therefore, the heat dissipation design of the projector light source module is the key content of the projector design.

However, the existing projectors have poor heat dissipation effect and high cost.

Utility model content

The technical problem to be solved by the utility model is to provide a projector for the problems of poor heat dissipation and high cost of the projector in the prior art.

The technical solution adopted by the utility model to solve the problems of the technologies described above is as follows:

A projector is provided, comprising a housing, an optical engine packaged in the housing, a fan, a first heat dissipation fin, a circuit board and a partition; the bottom of the housing has an air extraction hole, and the side of the housing has an exhaust hole; A first air inlet is opened on the surface, and a second air inlet is opened on the lower surface; at the same time, a first air outlet and a second air outlet are opened on the side of the fan; the fan is fixed on the casing, and the second air inlet The tuyere is facing the exhaust hole of the housing, and the second air outlet is facing the exhaust hole; the optical machine and the first cooling fin are fixed to each other and arranged in the housing; the first cooling fin The fin is located between the light engine and the fan, and is adjacent to the first air outlet; the first heat dissipation fin is facing the exhaust hole at the same time; the circuit board is fixed on the casing, and is facing the The first air inlet; the baffle is arranged on the casing, and is located between the light machine and the fan; the baffle extends from the light machine to the fan, and the part adjacent to the baffle and the fan is located The side of the first air outlet away from the exhaust hole; meanwhile, the first cooling fin is located between the partition plate and the exhaust hole.

In the projector provided by the utility model, the second air inlet of the fan is facing the exhaust hole, and the first air inlet of the fan is directed at the circuit board, and at the same time, the second air outlet of the fan is facing the exhaust hole. When the fan is working, the heat generated by various components on the circuit board can be sucked into the fan through the first air inlet and discharged from the second air outlet through the exhaust hole, that is, the heat from the circuit board through the first air inlet, the second air inlet, and the second air outlet can be formed. The first heat dissipation path from the air outlet to the exhaust port effectively dissipates heat to the circuit board.

In addition, a first air outlet is opened on the side of the fan, and the first air outlet faces the optical machine and is adjacent to the first heat dissipation fin. When the fan is working, the air inhaled through the air outlet and the second air inlet is blown out from the first air outlet, and is discharged from the exhaust hole after sweeping through the first heat dissipation fins, that is, the air is formed from the first air outlet through the first heat dissipation fins. The second heat dissipation path from the chip to the exhaust hole is used to dissipate heat from the optical machine.

Simultaneously, since the partition board is arranged between the optical machine and the fan, combined with the function of the fan, it can effectively prevent a large amount of heat generated by the optical machine from spreading to the circuit board, thereby effectively ensuring the optical machine and the circuit board in the projector. heat radiation. Moreover, the above projector has a simple structure, does not need to add too many components, and has low cost.

Further, the baffle extends from the optical machine to the fan along a direction away from the exhaust hole.

Further, the baffle is against the optical machine and the fan at the same time.

Further, the plurality of fins on the first heat dissipation fins are all arranged along the direction from the partition plate to the exhaust hole.

Further, the light engine includes red LED lights, green LED lights and blue LED lights, and the red LED lights, green LED lights and blue LED lights are all in contact with the first cooling fins.

Further, the optical machine is screwed to the first heat dissipation fin.

Further, the gap between the optical machine and the first heat dissipation fin is filled with thermal conductive silica gel.

Further, the projector further includes a second heat dissipation fin, and the second heat dissipation fin is disposed between the second air outlet and the exhaust hole.

Further, the plurality of fins on the second heat dissipation fins are all arranged along the direction from the second air outlet to the exhaust hole.

Further, a plurality of air extraction holes are evenly distributed on the bottom of the casing.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the projector provided by the preferred embodiment of the present invention;

Fig. 2 is an exploded view of the projector provided by the preferred embodiment of the present invention;

Fig. 3 is a first-angle perspective view of the assembled state of the fan and the second cooling fin in the projector provided by the preferred embodiment of the present invention;

Fig. 4 is a second angle perspective view of the assembly state of the fan and the second cooling fin in the projector provided by the preferred embodiment of the present invention.

The reference signs in the accompanying drawings of the description are as follows:

1. Shell; 11. Air extraction hole; 2. Optical machine; 3. Fan; 31. First air inlet; 32. First air outlet; 4. First cooling fin; 5. Second cooling fin; 6. clapboard.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner" and "outer" are based on the The orientation or positional relationship is only for the convenience of describing the utility model and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a reference to the utility model. limits. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or an optional connection. Disassembled connection, or integral connection; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The projector provided by the utility model includes a casing and an optical engine packaged in the casing, a fan, a first cooling fin, a circuit board and a partition; the bottom of the casing has an air extraction hole, and the side of the casing has an exhaust hole; the fan The upper surface is provided with a first air inlet, and the lower surface is provided with a second air inlet; at the same time, the side of the fan is provided with a first air outlet and a second air outlet; the fan is fixed on the casing, and the second The air inlet is facing the exhaust hole of the casing, and the second air outlet is facing the exhaust hole; the optical machine and the first cooling fin are fixed to each other and arranged in the casing; the first cooling fin The fins are located between the light engine and the fan, and are adjacent to the first air outlet; the first heat dissipation fins face the exhaust holes at the same time; the circuit board is fixed on the casing, and faces the The first air inlet; the partition is arranged on the casing, and is located between the light machine and the fan; the partition extends from the light machine to the fan, and the partition is adjacent to the fan It is located on the side of the first air outlet away from the exhaust hole; meanwhile, the first cooling fin is located between the separator and the exhaust hole.

According to the present invention, the above-mentioned projector has a housing, and various functional components of the projector, such as the light engine, the fan, the first cooling fin, the circuit board and the partition plate in the present invention are all encapsulated in the housing. In order to form an effective air flow channel, as in the prior art, the housing has suction holes for air to enter and exhaust holes for air to exit. Specifically, the air extraction hole is located at the bottom of the casing, and the exhaust hole is located on the side of the casing. In order to take into account the local strength of the shell and the effect of pumping air, it is preferable to use small air pumping holes, and there are multiple air pumping holes on the bottom of the shell, and the multiple air pumping holes are evenly distributed on the bottom of the shell.

Specifically, the above-mentioned optical machine is well known in the prior art, and is mainly used for emitting light, and according to the received signal, the emitted light is imaged and emitted to generate an image on the background. Like various existing projectors, the light machine includes LED red lights, LED green lights and LED blue lights, and the above-mentioned LED red lights, LED green lights and LED blue lights generate high-brightness light for imaging.

The above-mentioned red LED lights, green LED lights and blue LED lights emit a lot of heat when they work. Therefore, usually the optical machine needs to be connected with a heat dissipation device to speed up the heat dissipation on the optical machine. In the utility model, the optical machine is fixedly connected with the first heat dissipation fin, and the light emission of the light machine is accelerated through the first heat dissipation fin.

In the present invention, the fixed combination of the first cooling fin and the optical machine can be conventional, for example, the optical machine is connected to the first cooling fin by screws. At the same time, in order to expel the heat on the first heat dissipation fins from the projector as soon as possible, in the present invention, the above-mentioned first heat dissipation fins face the exhaust holes at the same time.

In order to better dissipate heat from the above red LED lights, green LED lights and blue LED lights, the red LED lights, green LED lights and blue LED lights are all in contact with the first cooling fins.

At the same time, after the first cooling fin is fixed on the optical machine, there will be more or less gaps between the first cooling fin and the optical machine. In order to further improve the heat dissipation effect, preferably, the optical machine and the first The gaps between the cooling fins are filled with thermal silica gel.

The structure of the above-mentioned first heat dissipation fin is existing. In order to accelerate heat conduction, the first heat dissipation fin is preferably made of aluminum. The first cooling fins include a plurality of fins arranged in parallel and separated from each other, so as to increase the contact area with the air and accelerate heat dissipation.

Like various existing projectors, in the present utility model, the projector also includes a circuit board. The circuit board is usually used to receive and process signals from external devices (such as computers), and then send corresponding signals to control the optical machine for imaging. The above-mentioned circuit board is usually provided with a plurality of electronic devices. During normal operation, the above-mentioned electronic devices will also generate heat. At the same time, due to the effective internal space of the projector, especially the micro-projector, the large amount of heat emitted by the aforementioned optical machine is very easy. Diffusion to the circuit board will further increase the heat on the circuit board, which is not conducive to the normal operation of the circuit board.

In the utility model, a fan is also arranged in the projector, which is used for simultaneously dissipating heat from the light machine and the circuit board.

According to the present invention, the above-mentioned fan has an upper surface and a lower surface opposite to each other. The upper surface and the lower surface are connected by side surfaces. Specifically, the upper surface of the fan is provided with a first air inlet, and the lower surface is provided with a second air inlet.

The fan is arranged in the casing, so that the first air inlet of the fan faces the circuit board, and the second air inlet of the fan faces the exhaust hole. When the fan is working, the heat on the circuit board can be sucked away through the first air inlet, and the cold air from the outside can be sucked in through the second air inlet and the exhaust hole for cooling and heat dissipation.

In the utility model, a first air outlet and a second air outlet are provided on the side of the fan.

The above-mentioned first air outlet faces the optical machine and is adjacent to the first heat dissipation fin fixed on the optical machine. The airflow blown by the fan from the first air outlet can pass through the first heat dissipation fin and be discharged from the exhaust hole, thereby aligning the optical machine To dissipate heat. At this time, the first cooling fin is located between the light engine and the fan.

As known to those skilled in the art, for a projector, the optical engine is the main heat generating component, and its heat generation is much greater than that on the circuit board. However, due to the limited internal space of the projector, a large amount of heat generated by the light engine can easily spread to the circuit board, which will have a negative impact on the circuit board.

In the utility model, it is important that a partition is also arranged in the casing. Specifically, the partition is arranged between the optical machine and the fan, and extends from the optical machine to the direction where the fan is located. At the same time, the part of the partition adjacent to the fan is located on the side of the first air outlet away from the exhaust hole, and the first cooling fin is located between the partition and the exhaust hole. between.

At this time, the optical machine, the partition and the fan form a heat dissipation channel from the first air outlet of the fan to the exhaust hole of the housing, and the first heat dissipation fins are located in the heat dissipation channel. In order to better improve the heat dissipation effect, preferably, the plurality of fins on the first heat dissipation fins are all arranged along the direction from the partition plate to the exhaust hole.

Under the above-mentioned structure, the airflow discharged from the first air outlet of the fan can be discharged stably through the first heat dissipation fin to the exhaust hole, so as to avoid the eddy current caused by the airflow wandering around in the casing, and greatly improve the heat dissipation effect.

At the same time, due to the setting of the above partitions and under the action of the fan, it can effectively prevent the heat generated on the optical machine from spreading to the circuit board, further ensuring the heat dissipation effect.

The installation direction of the partitions can be changed in a wide range. In order to better improve the heat dissipation effect, preferably, the partitions extend from the optical machine to the fan in a direction away from the exhaust hole. At this time, the partition is arranged obliquely from the optical machine to the fan, which is beneficial to avoid dead angles in the heat dissipation flow channel formed between the optical machine, the partition and the fan, thereby improving the heat dissipation effect. Furthermore, the partition is against the optical machine and the fan at the same time.

According to the utility model, there is a second air outlet on the side of the fan, and the second air outlet is facing the exhaust hole, and the hot air on the circuit board sucked by the fan from the first air inlet can be discharged through the exhaust hole.

Although the fan sucks air from the first air inlet and the second air inlet at the same time when the fan is working, what is sucked from the first air inlet is the hot air near the circuit board. The airflow blown out from the first air outlet by the fan inevitably includes the hot air near the circuit board sucked in from the first air inlet. However, as mentioned earlier, the main heat-generating component of the projector is the optical engine. Compared with the heat on the optical engine, the heat generated on the circuit board is very small; at the same time, the fan sucks in air from the first air inlet and the second air inlet. , wherein the air inhaled from the second air inlet is usually cold outside air, and after the hot air inhaled from the first air inlet is mixed with the above-mentioned cold air, the heat is further reduced, so the heat of the airflow blown out from the first air outlet Compared with the heat on the first cooling fins, it is negligible and will not have a substantial impact on the cooling effect.

According to the present invention, preferably, the projector further includes a second cooling fin, and the second cooling fin is arranged between the second air outlet and the exhaust hole.

In order to better ensure the heat dissipation effect, further preferably, the plurality of fins on the second heat dissipation fins are arranged along the direction from the second air outlet to the exhaust hole.

The structure of the projector provided by the preferred embodiment of the present invention will be further described below with reference to FIGS. 1-4 .

Referring to Fig. 1 and Fig. 2, this projector comprises shell 1 and the optical machine 2 that is encapsulated in this shell 1, the first cooling fin 4, dividing plate 6, fan 3, the second cooling fin 5 and circuit board (Fig. not shown).

Wherein, the structure of the fan 3 is shown in FIG. 3 and FIG. 4 . The fan 3 is flat. The upper surface of the fan 3 is provided with a first air inlet 31 , and the lower surface of the fan 3 is provided with a second air inlet (not shown). A first air outlet 32 and a second air outlet (not shown in the figure) are opened on the side of the fan 3 .

The second radiating fin 5 is fixed with the fan 3 at the second air outlet of the fan 3, and the setting direction of a plurality of fins on the second radiating fin 5 is the air outlet direction of the second air outlet, so that the fan 3 The airflow inside can be smoothly discharged through the second cooling fins 5 .

Referring back to FIG. 1 and FIG. 2 , the optical engine 2 and the fan 3 are arranged in the casing 1 side by side. And the second air inlet of the fan 3 is facing the exhaust hole 11 on the casing 1, the second air outlet of the fan 3 and the second cooling fin 5 are facing the exhaust hole on the casing 1, and the second cooling fin 5 is located Between the second air outlet of the fan 3 and the exhaust hole.

The first cooling fins 4 are fixed on the optical machine 2 , and the first cooling fins 4 are located between the optical machine 2 and the fan 3 . At the same time, the first cooling fins 4 are facing the exhaust holes. the

A partition 6 is also arranged inside the casing 1 between the optical machine 2 and the fan 3 . The partition 6 extends from the light machine 2 to the side of the fan 3 , and the partition 6 abuts against the side of the light machine 2 and the fan 3 at the same time. The part where the partition plate 6 connects with the fan 3 is located on the side of the first air outlet 32 away from the exhaust hole.

At the same time, the end of the partition 6 abutting against the fan 3 is inclined in a direction away from the exhaust hole relative to the end of the partition 6 abutting against the optical machine 2 . As shown in FIG. 1 , the partition 6 forms an acute angle with the side wall of the fan 3 , and forms an obtuse angle with the optical machine 2 .

The first cooling fins 4 are located between the partition plate 6 and the exhaust holes. And the plurality of fins on the first heat dissipation fins 4 are all arranged along the direction from the partition plate 6 to the exhaust holes.

At the same time, the circuit board (not shown in the figure) is arranged in the casing 1 and faces the first air inlet 31 of the fan 3 .

When working, the fan 3 runs and sucks in air from the first air inlet 31 and the second air inlet at the same time, wherein the hot air near the circuit board is sucked in from the first air inlet 31 .

Part of the airflow entering the fan 3 is discharged from the second air outlet through the second heat dissipation fin 5 and the exhaust hole, and part of it enters between the fan 3, the optical machine 2 and the partition 6 from the first air outlet 32, and flows along the first heat dissipation The fins 4 discharge the hot air on the first cooling fins 4 through the exhaust holes, so as to realize the purpose of cooling the light machine 2 and the circuit board at the same time. Moreover, due to the blocking and guiding function of the partition plate 6, combined with the function of the fan 3, the hot air near the optical machine 2 can be prevented from diffusing to the circuit board, effectively ensuring the heat dissipation effect.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A projector, characterized in that it comprises a housing (1) and an optical machine (2), a fan (3), a first heat dissipation fin (4), a circuit board and a dividing plate encapsulated in the housing (1) (6); The bottom of the casing (1) has an air extraction hole (11), and the side of the casing (1) has an exhaust hole; The upper surface of the fan (3) is provided with a first air inlet (31), and the lower surface is provided with a second air inlet; meanwhile, the side of the fan (3) is provided with a first air outlet (32) and a second air outlet. Air outlet; the fan (3) is fixed on the casing (1), and the second air inlet is facing the air extraction hole (11) of the casing (1), and the second air outlet is facing the exhaust hole; The optical machine (2) and the first cooling fin (4) are fixed to each other and arranged in the housing (1); the first cooling fin (4) is located between the optical machine (2) and the fan (3) between, and adjacent to the first air outlet (32); the first cooling fin (4) faces the exhaust hole at the same time; The circuit board is fixed on the casing (1) and faces the first air inlet (31); The partition (6) is arranged on the casing (1), and is located between the light machine (2) and the fan (3); the partition (6) is from the light machine (2) to the fan (3) extended, and the part of the partition (6) adjacent to the fan (3) is located on the side of the first air outlet (32) away from the exhaust hole; at the same time, the first cooling fin (4) Located between the partition (6) and the exhaust hole. 2. The projector according to claim 1, characterized in that, the partition (6) extends from the optical machine (2) to the fan (3) in a direction away from the exhaust hole. 3. The projector according to claim 2, characterized in that, the partition (6) abuts against the optical machine (2) and the fan (3) simultaneously. 4. The projector according to any one of claims 1-3, characterized in that, the plurality of fins on the first heat dissipation fins (4) are all along the The orientation of the pores is set. 5. The projector according to claim 4, wherein the light machine (2) includes LED red lights, LED green lights and LED blue lights, and the LED red lights, LED green lights and LED blue lights are all compatible with the LED lights. contact with the first cooling fin (4). 6. The projector according to any one of claims 1-3,5, characterized in that, the optical machine (2) is screwed to the first heat dissipation fin (4). 7. The projector according to claim 6, characterized in that, the gap between the optical machine (2) and the first heat dissipation fin (4) is filled with thermal conductive silica gel. 8. The projector according to any one of claims 1-3, 5, 7, characterized in that, the projector further comprises a second heat dissipation fin (5), and the second heat dissipation fin (5) ) is disposed between the second air outlet and the exhaust hole. 9. The projector according to claim 8, characterized in that, the plurality of fins on the second heat dissipation fins (5) are all arranged along a direction from the second air outlet to the exhaust hole. 10. The projector according to claim 1, characterized in that, a plurality of air extraction holes (11) are uniformly distributed on the bottom of the casing (1).