CN114721210A

CN114721210A - Projection equipment

Info

Publication number: CN114721210A
Application number: CN202210275177.7A
Authority: CN
Inventors: 黄思尧
Original assignee: Formovie Chongqing Innovative Technology Co Ltd
Current assignee: Formovie Chongqing Innovative Technology Co Ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-07-08
Anticipated expiration: 2042-03-21
Also published as: CN114721210B

Abstract

The invention relates to projection equipment. One side of the optical machine is connected with a projection lens, and the first circuit board is arranged below the projection lens. The optical machine is internally provided with an optical modulator, one side of the optical machine, which is far away from the projection lens, is provided with a first radiator, and the first radiator is thermally connected with the optical modulator. The fan assembly comprises a first fan and a second fan, and the first fan and the second fan are both arranged between the light machine and the air inlet hole. The air inlets of the first fan and the second fan face the air inlet hole. The air outlet of the first fan is opposite to the first radiator and used for blowing cooling air flow to the first radiator and discharging the cooling air flow from the air outlet. The air outlet of the second fan is opposite to the side part of the projection lens and used for enabling cooling air flow to face the projection lens and the first circuit board and be discharged from the air outlet hole. Therefore, the heat dissipation effect is good, the structure is compact, the space utilization rate is high, and the size of the projection equipment is reduced.

Description

Projection device

Technical Field

The invention relates to the technical field of projection, in particular to projection equipment.

Background

Projection equipment is equipment capable of projecting videos, images, characters and the like onto a curtain for display, and is widely applied to places such as families, offices, schools, movie theaters and the like.

With the development of the times, consumers have made higher demands on the small size and portability of projection devices. The smaller the volume of the projection device, the higher the heat dissipation requirements. Therefore, how to reduce the volume and effectively dissipate heat is an urgent problem to be solved in the current projection equipment.

Disclosure of Invention

Therefore, it is necessary to provide a projection apparatus with good heat dissipation effect, which is beneficial to reducing the volume of the projection apparatus.

A projection device comprises a shell, an optical machine, a first circuit board and a fan assembly, wherein the optical machine, the first circuit board and the fan assembly are arranged in the shell;

the shell comprises a first side wall and a second side wall opposite to the first side wall, the first side wall is provided with an air outlet, and the second side wall is provided with an air inlet;

one side of the optical machine is connected with a projection lens, and the first circuit board is arranged below the projection lens; an optical modulator is arranged in the optical machine, a first radiator is arranged on one side of the optical machine, which is far away from the projection lens, and the first radiator is thermally connected with the optical modulator;

the fan assembly comprises a first fan and a second fan, and the first fan and the second fan are both arranged between the optical machine and the air inlet hole; the air inlets of the first fan and the second fan face the air inlet holes and are respectively communicated with the air inlet holes; the air outlet of the first fan is opposite to the first radiator, and the first fan is used for blowing cooling air flow to the first radiator and discharging the cooling air flow from the air outlet; the air outlet of the second fan is opposite to the side part of the projection lens, and the second fan is used for enabling the cooling air flow to face the projection lens and the first circuit board and be discharged from the air outlet.

In one embodiment, the projection apparatus further includes a light source device disposed in the housing, the light source device is connected to the optical engine, the light source device is located on a side of the first heat sink away from the first fan, and the first fan is further configured to blow the cooling airflow to the light source device.

In one embodiment, the projection apparatus further includes a second circuit board disposed in the housing, the second circuit board is located below the light source device, the second circuit board and the light source device are spaced to form a first space, and the first space is respectively communicated with the air outlet of the first fan and the air outlet; and a second interval is formed between the projection lens and the first circuit board at intervals, and the second interval is respectively communicated with the air outlet of the second fan and the air outlet hole.

In one embodiment, the first heat sink includes a plurality of first heat dissipation fins arranged at intervals, a first air flow channel is formed between two adjacent first heat dissipation fins, one end of the first air flow channel faces the air outlet of the first fan, and the other end faces the light source device.

In one embodiment, an accommodating space is defined by a side of the optical engine away from the light source device and a side of the optical engine away from the projection lens, and the first heat sink is disposed in the accommodating space.

In one embodiment, a second heat sink is disposed on one side of the light source device, the second heat sink is located between the air outlet and the projection lens, the second heat sink is thermally connected to the light source device, and the second fan is further configured to blow the cooling air flow to the second heat sink.

In one embodiment, the second heat sink includes a plurality of second heat dissipation fins arranged at intervals, a second airflow channel is formed between two adjacent second heat dissipation fins, one end of the second airflow channel faces the projection lens, and the other end of the second airflow channel faces the air outlet.

In one embodiment, an electronic component is disposed on a side of the first circuit board facing the projection lens, a third heat sink is disposed on the first circuit board, the third heat sink is thermally connected to the electronic component, the third heat sink is located below the second heat sink, and the second fan is further configured to blow the cooling airflow to the third heat sink.

In one embodiment, the first fan and the second fan are arranged between the light machine and the air inlet hole side by side.

In one embodiment, the housing further includes a third sidewall and a fourth sidewall, which are oppositely disposed, the third sidewall and the fourth sidewall are both disposed between the first sidewall and the second sidewall, and two sides of the third sidewall and the fourth sidewall are respectively connected to the first sidewall and the second sidewall; the projection equipment further comprises a sound box, and the sound box is arranged between the projection lens and the third side wall; one side of the fan assembly is abutted against the sound box, and the other side of the fan assembly is provided with a first sealing piece which is respectively abutted against the fourth side wall and the fan assembly; one side of the sound box facing the top wall is provided with a second sealing piece, the second sealing piece extends along the axial direction of the fan assembly, and part of the second sealing piece is arranged corresponding to the fan assembly.

When the projection device works, the light modulator generates heat and transfers the heat to the first heat sink. At the same time, the first circuit board also generates heat. The first fan and the second fan rotate to generate negative pressure, so that air outside the shell enters the shell through the air inlet hole in the second side wall, and the air forms cooling air flow under the action of the first fan and the second fan. The first fan blows cooling air flow to the first radiator, and the cooling air flow takes away heat on the first radiator to realize heat dissipation of the optical modulator; and the air flow after heat exchange is discharged out of the shell from the air outlet hole of the first side wall. The second fan blows cooling air flow to the projection lens and the first circuit board, and the cooling air flow takes away heat on the projection lens and the first circuit board to realize heat dissipation of the projection lens and the first circuit board; and the cooling airflow after heat exchange is discharged out of the shell from the air outlet hole of the first side wall. Therefore, the heat dissipation of the optical modulator, the projection lens and the first circuit board can be realized, and the heat dissipation effect is good. Moreover, the first fan and the second fan with different powers can be selected according to the amount of heat generated by the optical machine, the projection lens and the first circuit board, so that the optical modulator, the projection lens and the first circuit board can be cooled, energy consumption can be reduced, and noise can be reduced. In addition, the optical machine, the projection lens, the first circuit board and the first radiator are reasonably stacked in the shell, the structure is compact, the space utilization rate is high, and the reduction of the volume of the projection equipment is facilitated.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a projection apparatus according to an embodiment of the invention;

FIG. 2 is an exploded view of the projection device shown in FIG. 1;

FIG. 3 is a schematic diagram of the structure of the internal components of the bottom case of the projection apparatus shown in FIG. 2;

FIG. 4 is a front view of the interior components of the bottom shell of the projection device shown in FIG. 3;

fig. 5 is a schematic structural diagram of an optical engine of the projection apparatus shown in fig. 2.

The reference numbers illustrate: 10. a housing; 11. a top cover; 111. a top wall; 1111. an opening; 12. a bottom case; 121. a first side wall; 1211. an air outlet; 122. a second side wall; 1221. an air inlet hole; 123. a third side wall; 124. a fourth side wall; 125. a bottom wall; 20. an optical machine; 30. a projection lens; 40. a light source device; 50. a fan assembly; 51. a first fan; 52. a second fan; 60. a first circuit board; 61. a second circuit board; 70. a first heat sink; 71. a first heat radiation fin; 80. a second heat sink; 81. a second heat radiation fin; 90. a third heat sink; 91. a third heat radiation fin; 100. sounding; 110. a first seal member; 120. a second seal.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 2, fig. 3 and fig. 5, a projection apparatus according to an embodiment of the invention includes a housing 10, and an optical engine 20, a fan assembly 50 and a first circuit board 60 disposed in the housing 10. The housing 10 includes a first sidewall 121 and a second sidewall 122 opposite to the first sidewall 121, the first sidewall 121 has an air outlet 1211, and the second sidewall 122 has an air inlet 1221. The projection lens 30 is connected to one side of the optical engine 20, and the first circuit board 60 is disposed below the projection lens 30. The optical machine 20 is provided with an optical modulator, one side of the optical machine 20 away from the projection lens 30 is provided with a first heat sink 70, and the first heat sink 70 is thermally connected with the optical modulator. The fan assembly 50 includes a first fan 51 and a second fan 52, and both the first fan 51 and the second fan 52 are disposed between the light machine 20 and the air inlet 1221. The air inlets of the first fan 51 and the second fan 52 face the air inlet holes 1221, and are respectively communicated with the air inlet holes 1221. The outlet of the first fan 51 is disposed opposite to the first heat sink 70, and the first fan 51 blows the cooling air flow to the first heat sink 70 and is discharged from the air outlet 1211. The air outlet of the second fan 52 is disposed opposite to the side of the projection lens 30, and the second fan 52 is used for discharging the cooling air toward the projection lens 30 and the first circuit board 60 from the air outlet 1211.

Alternatively, the light modulator may be a DMD, LCos, LCD screen, etc., without limitation.

Specifically, referring to fig. 4, the first circuit board 60 is provided with electronic components on a side facing the projection lens 30. Optionally, the first circuit board 60 may be a motherboard, and the electronic components are correspondingly a main control chip, and the main control chip is used for processing input image signals, connecting wireless signals, and the like. The main board is also provided with a printed circuit and various input interfaces, wherein the input interfaces comprise an earphone/sound 100 output interface, a USB interface, a DC power supply interface and the like. Of course, the first circuit board 60 may also be a power board, and the electronic component may also be a power control chip.

In operation, the light modulator generates heat and transfers the heat to the first heat sink 70. At the same time, the first circuit board 60 also generates heat. The first fan 51 and the second fan 52 rotate to generate a negative pressure, so that the air outside the casing 10 enters the casing 10 through the air inlet holes 1221 of the second side wall 122, and the air forms a cooling air flow under the action of the first fan 51 and the second fan 52. The first fan 51 blows cooling air flow to the first heat sink 70, and the cooling air flow takes away heat on the first heat sink 70, so that heat dissipation of the optical modulator is realized; the heat-exchanged air is discharged from the air outlet 1211 of the first sidewall 121 to the outside of the case 10. The second fan 52 blows cooling air flow to the projection lens 30 and the first circuit board 60, and the cooling air flow takes away heat on the projection lens 30 and the first circuit board 60, so that heat dissipation of the projection lens 30 and the first circuit board 60 is realized; the cooling airflow after heat exchange is discharged out of the casing 10 through the air outlet 1211 of the first sidewall 121. Thus, the heat dissipation of the optical modulator, the projection lens 30 and the first circuit board 60 can be realized, and the heat dissipation effect is good. Moreover, the first fan 51 and the second fan 52 with different powers can be selected according to the amount of heat generated by the optical engine 20, the projection lens 30 and the first circuit board 60, so that the light modulator, the projection lens 30 and the first circuit board 60 can be cooled, energy consumption can be reduced, and noise can be reduced. In addition, the optical engine 20, the projection lens 30, the first circuit board 60, and the first heat sink 70 are reasonably stacked in the housing 10, so that the structure is compact, the space utilization rate is high, and the reduction of the volume of the projection apparatus is facilitated.

In this embodiment, referring to fig. 1 and fig. 3, the housing 10 further includes a top wall 111 and a bottom wall 125 opposite to the top wall 111, the projection apparatus emits light from the top wall 111, that is, a light outlet of the projection lens 30 faces one side of the top wall 111, the first circuit board 60 is disposed between the optical engine 20 and the bottom wall 125, the first circuit board 60 and the bottom wall 125 are disposed in parallel, and the first side wall 121 and the second side wall 122 are left and right side walls of the housing 10, respectively. Of course, in other embodiments, the projection device may also be a projection device that emits light from a sidewall.

In one embodiment, referring to fig. 1 and 4, housing 10 includes a top cover 11 and a bottom cover 12. The top cover 11 includes a top wall 111, and the bottom cover 12 includes a first sidewall 121, a second sidewall 122 opposite to the first sidewall 121, a third sidewall 123, a fourth sidewall 124 opposite to the third sidewall 123, and a bottom wall 125 opposite to the top wall 111. The top cover 11 covers the bottom case 12, and the top cover and the bottom case together enclose an accommodating space for accommodating the optical engine 20, the first circuit board 60, the fan assembly 50, and the like. The top cover 11 and the bottom case 12 may be connected by a snap connection, a screw locking, an adhesive, or the like. Further, the top cover 11 is provided with an opening 1111, and the light outlet of the projection lens 30 is provided at the opening 1111.

Alternatively, the housing 10 may be made of plastic such as PC, ABS, PS, PMMA, etc., or metal such as aluminum alloy, titanium alloy, etc. In addition, the overall shape of the casing 10 may be a rectangular parallelepiped, a cube, or the like.

In one embodiment, referring to fig. 3, the first fan 51 and the second fan 52 are disposed side by side between the light engine 20 and the air inlet 1221. Therefore, the structure is compact, the space utilization rate is improved, and the volume of the projection equipment is reduced. Of course, in other embodiments, the first fan 51 and the second fan 52 may be arranged between the air inlet 1221 and the air outlet 20 in a staggered manner.

Alternatively, referring to fig. 3, the first fan 51 and the second fan 52 are both axial fans. Therefore, the axial flow fan is simple to install, low in cost and power consumption, fast in heat dissipation, low in noise, energy-saving and environment-friendly. Of course, in other embodiments, the first fan 51 and the second fan 52 may also be turbine fans.

In one embodiment, referring to fig. 2, 3 and 4, the projection apparatus further includes a light source device 40 disposed in the housing 10, the light source device 40 is connected to the optical engine 20, the light source device 40 is located on a side of the first heat sink 70 away from the first fan 51, and the first fan 51 is further configured to blow a cooling air flow toward the light source device 40. The light source device 40 may also generate heat when the projection apparatus is in operation. Since the light source device 40 is located on the side of the first heat sink 70 away from the first fan 51, the cooling air flow blown by the first fan 51 passes through the light source device 40 after passing through the first heat sink 70, carries away the heat of the light source device 40, and is finally exhausted out of the housing 10 through the air outlet 1211 of the first side wall 121. In this way, the cooling airflow blown by the first fan 51 can dissipate heat not only from the optical modulator but also from the light source device 40, thereby improving heat dissipation efficiency. Since the heat generated by the optical engine 20 and the light source device 40 is greater than the heat generated by the projection lens 30 and the first circuit board 60, the size of the first fan 51 is larger than the size of the second fan 52, or the power of the first fan 51 is larger than the power of the second fan 52.

Alternatively, referring to fig. 4, the light source device 40 is a light source for generating three color lights by exciting the color wheel with blue light. Specifically, the light source device 40 includes a housing, an excitation light source disposed in the housing, and a color wheel, wherein the excitation light source is configured to emit blue excitation light. The color wheel comprises a first segmentation area, a second segmentation area and a third segmentation area which are sequentially arranged along the circumferential direction, the first segmentation area is used for receiving exciting light and emitting red light, the second segmentation area is used for receiving the exciting light and emitting green light, and the third segmentation area is used for receiving the exciting light and emitting blue light. Of course, in other embodiments, the light source device 40 may also be a light source using three pure lasers of red, green and blue. Specifically, the light source device 40 includes a housing, and a first light source, a second light source, and a third light source disposed in the housing, and the first light source, the second light source, and the third light source are capable of emitting red light, green light, and blue light, respectively.

Further, referring to fig. 3, an accommodating space is defined by a side of the optical engine 20 away from the light source device 40 and a side of the optical engine 20 away from the projection lens 30, and the first heat sink 70 is disposed in the accommodating space. Therefore, the structure is compact, the space utilization rate is high, and the reduction of the volume of the projection equipment is facilitated.

Specifically, referring to fig. 3 and 5, the first heat sink 70 includes a plurality of first heat dissipation fins 71 arranged at intervals. A first air flow channel is formed between two adjacent first heat dissipation fins 71, one end of the first air flow channel faces the air outlet of the first fan 51, and the other end faces the light source device 40. Specifically, each first heat dissipation fin 71 extends along the direction from the light source device 40 to the first fan 51, and a plurality of first heat dissipation fins 71 may be arranged at intervals along the direction from the top wall 111 to the bottom wall 125 (i.e., the up-down direction) of the housing 10, or a plurality of first heat dissipation fins 71 may be arranged at intervals along the direction from the optical engine 20 to the projection lens 30. When the projection equipment works, the light modulator generates heat and transmits the heat to the first radiating fins 71, and the arrangement of the first radiating fins 71 can increase the heat exchange area with cooling air flow, so that the radiating efficiency of the light modulator is improved. In addition, a first air flow channel is formed between two adjacent first heat dissipation fins 71, and two ends of the first air flow channel respectively face the air outlet of the first fan 51 and the light source device 40, so that the first air flow channel can guide cooling air flow to flow from the air outlet of the first fan 51 to the light source device 40, heat dissipation and cooling of the light source device 40 can be ensured, and heat dissipation efficiency is improved.

It should be noted that the number of the first heat dissipation fins 71 may be set according to actual requirements, and is not limited in detail herein.

In one embodiment, referring to fig. 3 and 5, the projection device further includes a second circuit board 61 disposed within the housing 10. Specifically, the second circuit board 61 is electrically connected to the optical engine 20 for controlling the optical engine 20. The second circuit board 61 is located below the light source device 40, and the second circuit board 61 and the light source device 40 are spaced apart from each other to form a first space, and the first space is respectively communicated with the air outlet of the first fan 51 and the air outlet 1211. In addition, a second interval is formed between the projection lens 30 and the first circuit board 60, and the second interval is respectively communicated with the air outlet and the air outlet 1211 of the second fan 52. When the projection apparatus is in operation, the first fan 51 blows cooling airflow to the first heat sink 70, so that the cooling airflow exchanges heat with the first heat sink 70 to take away heat on the first heat sink 70, thereby reducing the temperature of the optical modulator; then, the cooling airflow passes through the first interval to take away heat from the surface of the second circuit board 61 and the light source device 40, so as to reduce the temperature of the second circuit board 61 and the light source device 40; finally, the cooling air flow is discharged from the air outlet 1211 to the outside of the case 10. The first circuit board 60 also generates heat when the projection device is in operation; the second fan 52 blows cooling air flow to the projection lens 30, and the cooling air flow takes away heat of the projection lens 30 and the first circuit board 60 through a second interval so as to reduce the temperature of the projection lens 30 and the first circuit board 60; finally, the cooling air flow is discharged from the air outlet 1211 of the first sidewall 121 to the outside of the case 10. In this way, the first fan 51 and the second fan 52 can dissipate heat of the light modulator, the light source device 40, the first circuit board 60, the second circuit board 61, the projection lens 30, and the like, and the heat dissipation effect is good.

In one embodiment, referring to fig. 3, a second heat sink 80 is provided at one side of the light source device 40. The second heat sink 80 is located between the air outlet 1211 and the projection lens 30, the second heat sink 80 is thermally connected to the light source device 40, and the second fan 52 is further configured to blow the cooling air flow toward the second heat sink 80. When the projection apparatus is in operation, the light source device 40 generates heat and transfers the heat to the second heat sink 80. The second fan 52 blows cooling air flow to the projection lens 30, and the cooling air flow firstly passes through the second interval to take away heat of the projection lens 30 and the first circuit board 60; then, the cooling air flow passes through the second heat sink 80, takes away heat from the second heat sink 80 to lower the temperature of the light source device 40, and is finally discharged out of the housing 10 through the air outlet 1211 of the first sidewall 121. In this way, the second heat sink 80 can also dissipate heat from the light source device 40.

Specifically, referring to fig. 3 and 5, the second heat sink 80 includes a plurality of second heat dissipation fins 81 disposed at intervals. Specifically, each of the second heat dissipation fins 81 extends along the projection lens 30 from the air outlet 1211, and the plurality of second heat dissipation fins 81 are arranged at intervals along the direction from the third sidewall 123 to the light source device 40. A second air flow channel is formed between two adjacent second heat dissipation fins 81, one end of the second air flow channel faces the projection lens 30, and the other end faces the air outlet 1211. Specifically, both ends of the second air flow passage face the second partition and the air outlet 1211, respectively. When the projection apparatus works, the light source device 40 generates heat and transfers the heat to the plurality of second heat dissipation fins 81, and the plurality of second heat dissipation fins 81 can increase the heat exchange area of the cooling air flow, thereby improving the heat dissipation efficiency of the light source device 40. In addition, a second airflow channel is formed between two adjacent second heat dissipation fins 81, and two ends of the second airflow channel face the second partition and the air outlet 1211, respectively, so that the second airflow channel can guide the flow direction of the cooling airflow, and ensure that the light source device 40 can be cooled.

It should be noted that the number of the second heat dissipation fins 81 can be set according to actual requirements, and is not specifically limited herein.

Further, referring to fig. 2 and 3, the first circuit board 60 is provided with electronic components on a side facing the projection lens 30. The first circuit board 60 is provided with a third heat sink 90, the third heat sink 90 is thermally connected to the electronic component, the third heat sink 90 is located below the second heat sink 80, and the second fan 52 is further configured to blow cooling air toward the third heat sink 90. Specifically, the third heat sink 90 and the electronic component may be thermally connected by a heat conductive adhesive or other heat conductive medium. When the projection apparatus is in operation, the cooling airflow blown by the second fan 52 passes through the projection lens 30 and the first circuit board 60, and takes away heat of the projection lens 30 and the first circuit board 60; then, the cooling air flow passes through the third heat sink 90, again taking away heat of the first circuit board 60; finally, the heat-exchanged air is discharged from the air outlet 1211 of the first sidewall 121 to the outside of the case 10. Thus, the third heat sink 90 is disposed on the first circuit board 60, and the third heat sink 90 is thermally connected to the electronic components of the first circuit board 60, so that the first circuit board 60 can be better cooled, and the heat dissipation effect is good. In addition, the third heat sink 90 is located below the second heat sink 80, so that the structure is compact, the space utilization rate is high, and the reduction of the size of the projection device is facilitated.

Specifically, referring to fig. 2 and 3, the third heat sink 90 includes a plurality of third heat dissipating fins 91 arranged at intervals. Specifically, each of the third heat dissipation fins 91 extends along a direction from the first circuit board 60 to the air outlet 1211, and the plurality of third heat dissipation fins 91 are arranged at intervals along a direction from the third sidewall 123 to the light source device 40. A third airflow channel is formed between two adjacent third heat dissipation fins 91, one end of the third airflow channel faces the first circuit board 60, and the other end faces the air outlet 1211. When the projection apparatus works, heat generated by the electronic components of the first circuit board 60 is transferred to the plurality of third heat dissipation fins 91, and the plurality of third heat dissipation fins 91 can increase the heat exchange area of the cooling air flow, thereby improving the heat dissipation efficiency of the first circuit board 60. In addition, a third air flow channel is formed between two adjacent third heat dissipation fins 91, and two ends of the third air flow channel face the first circuit board 60 and the air outlet 1211 respectively, so that the third air flow channel can guide the flow direction of the cooling air flow.

It should be noted that the number of the third heat dissipation fins 91 may be set according to actual requirements, and is not specifically limited herein.

In one embodiment, referring to fig. 3 and 4, the projection device further includes a sound 100. The speaker 100 is disposed between the projection lens 30 and the third sidewall 123, and is electrically connected to the first circuit board 60. Specifically, the third side wall 123 is provided with a sound outlet hole corresponding to the sound outlet portion of the sound box 100. Through built-in stereo set 100 at projection equipment, projection equipment can play the sound of music or presentation film on line like this, still supports bluetooth sound mode for this projection equipment's function is diversified, satisfies more user demands. In addition, the sound box 100 is disposed between the projection lens 30 and the third side wall 123, so that the space in the housing 10 can be reasonably utilized, the space utilization rate is improved, and the volume of the projection apparatus is reduced.

It should be noted that the number of the sound boxes 100 may be set according to actual requirements, and is not limited in particular. In the present embodiment, there is one sound 100, and one sound 100 is disposed between the projection lens 30 and the third side wall 123 of the housing 10.

Further, referring to fig. 3 and 4, one side of the fan assembly 50 abuts against the audio 100, and the other side is provided with a first sealing member 110, and the first sealing member 110 abuts against the fourth side wall 124 and the fan assembly 50, respectively. The side of the sound box 100 facing the top wall 111 is provided with a second sealing member 120, the second sealing member 120 extends along the axial direction of the fan assembly 50, and a part of the second sealing member 120 is arranged corresponding to the fan assembly 50. In this way, the backflow of the cooling airflow can be prevented.

Specifically, referring to fig. 3 and 4, the first fan 51 and the second fan 52 are disposed in parallel in the casing 10, the first fan 51 abuts against the second fan 52, and a side of the second fan 52 away from the first fan 51 abuts against the sound box 100. A first sealing member 110 is provided between a side of the first fan 51 away from the second fan 52 and the fourth side wall 124, and the first sealing member 110 abuts against the first fan 51 and the fourth side wall 124, respectively. The second sealing member 120 is disposed on a side of the sound box 100 facing the top wall 111, and a portion of the second sealing member 120 is disposed corresponding to the second fan 52.

Optionally, the length of the sound device 100 extends from the first sidewall 121 to the second sidewall 122, so that the sound device 100 can guide the second fan 52 to blow the cooling air flow to the projection lens 30, the first circuit board 60, the second heat sink 80 and the third heat sink 90 towards the sidewall of the projection lens 30, and the cooling air flow is prevented from spreading.

Optionally, the first seal 110 and the second seal 120 are both foam. Of course, in other embodiments, the first sealing element 110 and the second sealing element 120 may be other members having the same function, and are not limited thereto.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A projection device is characterized by comprising a shell, an optical machine, a first circuit board and a fan assembly, wherein the optical machine, the first circuit board and the fan assembly are arranged in the shell;

the shell comprises a first side wall and a second side wall opposite to the first side wall, the first side wall is provided with an air outlet hole, and the second side wall is provided with an air inlet hole;

the fan assembly comprises a first fan and a second fan, and the first fan and the second fan are both arranged between the optical machine and the air inlet hole; the air inlets of the first fan and the second fan face the air inlet holes and are respectively communicated with the air inlet holes; the air outlet of the first fan is opposite to the first radiator, and the first fan is used for blowing cooling air flow to the first radiator and discharging the cooling air flow from the air outlet; and the air outlet of the second fan is opposite to the side part of the projection lens, and the second fan is used for enabling the cooling air flow to face the projection lens and the first circuit board and be discharged from the air outlet.

2. The projection apparatus according to claim 1, further comprising a light source device disposed in the housing, wherein the light source device is connected to the optical engine, and the light source device is disposed on a side of the first heat sink away from the first fan, and the first fan is further configured to blow the cooling air toward the light source device.

3. The projection apparatus according to claim 2, further comprising a second circuit board disposed in the housing, wherein the second circuit board is located below the light source device, and a first space is formed between the second circuit board and the light source device, and the first space is respectively communicated with the air outlet of the first fan and the air outlet; and a second interval is formed between the projection lens and the first circuit board and is respectively communicated with the air outlet of the second fan and the air outlet hole.

4. The projection apparatus according to claim 2, wherein the first heat sink includes a plurality of first heat dissipation fins arranged at intervals, a first air flow channel is formed between two adjacent first heat dissipation fins, one end of the first air flow channel faces the air outlet of the first fan, and the other end faces the light source device.

5. The projection apparatus according to claim 2, wherein a side of the optical engine away from the light source device and a side of the optical engine away from the projection lens are surrounded to form an accommodation space, and the first heat sink is disposed in the accommodation space.

6. The projection apparatus according to claim 2, wherein a second heat sink is disposed on a side of the light source device, the second heat sink is located between the air outlet and the projection lens, and is thermally connected to the light source device, and the second fan is further configured to blow the cooling air toward the second heat sink.

7. The projection apparatus according to claim 6, wherein the second heat sink includes a plurality of second heat dissipation fins arranged at intervals, a second air flow channel is formed between two adjacent second heat dissipation fins, one end of the second air flow channel faces the projection lens, and the other end of the second air flow channel faces the air outlet.

8. The projection apparatus according to claim 6, wherein the first circuit board is provided with an electronic component on a side facing the projection lens, the first circuit board is provided with a third heat sink, the third heat sink is thermally connected to the electronic component, the third heat sink is located below the second heat sink, and the second fan is further configured to blow the cooling air flow toward the third heat sink.

9. The projection apparatus according to any one of claims 1 to 8, wherein the first fan and the second fan are disposed side by side between the light engine and the air inlet.

10. The projection apparatus according to any one of claims 1 to 8, wherein the housing further comprises a third sidewall and a fourth sidewall, which are disposed opposite to each other, and the third sidewall and the fourth sidewall are both disposed between the first sidewall and the second sidewall, and two sides of the third sidewall and the fourth sidewall are respectively connected to the first sidewall and the second sidewall;

the projection equipment further comprises a sound box, and the sound box is arranged between the projection lens and the third side wall; one side of the fan assembly is abutted against the sound box, and the other side of the fan assembly is provided with a first sealing piece which is respectively abutted against the fourth side wall and the fan assembly; one side of the sound equipment facing the top wall is provided with a second sealing piece, the second sealing piece extends along the axial direction of the fan assembly, and part of the second sealing piece is arranged corresponding to the fan assembly.