CN114114799A

CN114114799A - Projection device

Info

Publication number: CN114114799A
Application number: CN202010880354.5A
Authority: CN
Inventors: 张琰; 邢哲
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2022-03-01
Also published as: WO2022042313A1

Abstract

The embodiment of the application discloses projection equipment, and belongs to the technical field of projection. The projection device includes: the projector comprises a containing part, an optical engine, a functional assembly and a projection screen; the receiving part is used for being supported on the supporting surface and is provided with a first receiving part and a second receiving part; the optical engine and the functional component are positioned in the inner cavity of the first accommodating part, the light emitting side of the first accommodating part is provided with a light transmitting area, the optical engine can emit light beams under the matching of the functional component and penetrates through the light transmitting area, and one side of the first accommodating part, which is far away from the second accommodating part, is provided with a vent hole; the second accommodating part is provided with an opening, and the projection screen can be accommodated in the second accommodating part based on the opening or can penetrate through the opening and be unfolded. In this application, one side through keeping away from the second holding portion on first holding portion sets up the ventilation hole to the heat dissipation of the first holding portion of being convenient for has guaranteed the stability that optical engine exited the light beam, has guaranteed projection equipment's projection effect.

Description

Projection device

Technical Field

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

Background

With the continuous development of science and technology, projection equipment is more and more applied to the work and the life of people. Currently, a projection device mainly includes an optical engine and a projection screen. The light outlet of the optical engine faces the projection screen to emit light beams to the projection screen, and the projection screen is used for reflecting the light beams to realize the display of pictures.

Disclosure of Invention

The embodiment of the application provides a projection device, which is used for solving the problem that the projection effect is poor due to the high-temperature phenomenon in the using process of the projection device. The technical scheme is as follows:

a projection device, the projection device comprising: the projector comprises a containing part, an optical engine, a functional assembly and a projection screen;

the receiving part is used for being supported on a supporting surface and is provided with a first receiving part and a second receiving part;

the optical engine and the functional component are positioned in an inner cavity of the first accommodating part, the first accommodating part is provided with a light-transmitting area, the optical engine is electrically connected with the functional component, the optical engine can emit light beams under the matching of the functional component and penetrates through the light-transmitting area, and a ventilation hole is formed in one side, away from the second accommodating part, of the first accommodating part;

the second accommodating part is provided with an opening, the projection screen can be accommodated in the second accommodating part based on the opening, or the projection screen penetrates through the opening and is unfolded, and the projection screen receives the light beam when being unfolded.

Optionally, the ventilation hole includes an air inlet and an air outlet, and the air inlet and the air outlet are located on two sides of the optical engine;

the projection device further comprises a heat dissipation device, the heat dissipation device is located in the inner cavity of the first accommodating portion, and the heat dissipation device is configured to drive airflow of the inner cavity of the first accommodating portion to flow based on the air inlet and the air outlet.

Optionally, the heat dissipation device includes an exhaust fan, the exhaust fan is located in the inner cavity of the first accommodating portion, and is located on the same side of the optical engine as the air outlet, and an air outlet side of the exhaust fan faces away from the optical engine.

Optionally, a distance between the air outlet and the air inlet is greater than or equal to a first reference distance.

Optionally, the first accommodating portion further has a first guide portion and a second guide member;

the first guide part is connected with the edge of the air outlet, the first guide part is used for guiding the air flow flowing through the air outlet to the direction far away from the air inlet, the second guide part is connected with the edge of the air inlet, and the second guide part is used for guiding the air flow far away from the air outlet to the air inlet.

Optionally, the first guide member and the second guide member are both louvers.

Optionally, the first receptacle further has a support frame;

the supporting frame comprises supporting legs and a latticed supporting plate, one ends of the supporting legs are connected with the inner wall of the first accommodating portion, the supporting plate is supported on the supporting legs, and the optical engine is located on the supporting plate.

Optionally, the functional components include a power panel, a control main board and a display panel;

the control main board, the display board and the power supply board are located in the inner cavity of the first accommodating portion, the control main board is electrically connected with the display board, the display board is electrically connected with the optical engine, the power supply board is respectively and electrically connected with the control main board, the display board and the optical engine, and the plane where the display board is located is parallel to the gas flowing direction in the first accommodating portion.

Optionally, a plane where the control main board is located is perpendicular to a flow direction of the airflow in the first accommodating portion, and the air inlet is located between the control main board and the optical engine.

Optionally, a plane of the power supply board is perpendicular to a gas flowing direction in the first accommodating portion.

Optionally, the air inlet is located between the power panel and the optical engine.

Optionally, the air outlet is located between the power panel and the optical engine

The technical scheme provided by the embodiment of the application has the beneficial effects that at least:

in the embodiment of the application, when the projection device is not used, the projection screen can be accommodated in the second accommodating part, so that the overall appearance size of the projection device is reduced; when the projection equipment is used, the projection screen can penetrate through the opening and is unfolded, so that the light beams emitted by the optical engine are received through the projection screen, the display of pictures on the projection screen is realized, and the normal use of the projection equipment is ensured. In addition, the optical engine and the projection screen are limited by the first accommodating part and the second accommodating part, so that the optical engine and the projection screen are integrated, the phenomenon of relative displacement between the optical engine and the projection screen is avoided, and the display effect of pictures on the projection screen is ensured. In addition, through set up the ventilation hole on first holding portion to the heat dissipation of first holding portion of being convenient for has guaranteed the stability that optical engine exited the light beam, has guaranteed projection equipment's projection effect.

Drawings

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

Fig. 1 is a schematic structural diagram of a projection apparatus provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another projection apparatus provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a receiving portion according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of another receiving portion provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram of another receiving portion provided in the embodiment of the present application;

fig. 6 is a schematic structural diagram of another receiving portion provided in the embodiment of the present application;

fig. 7 is a schematic structural diagram of another receiving portion provided in the embodiment of the present application;

fig. 8 is a schematic structural diagram of another receiving portion according to an embodiment of the present disclosure;

fig. 9 is a schematic top view of a projection apparatus according to an embodiment of the present application;

fig. 10 is a schematic top view of another projection apparatus provided in an embodiment of the present application;

fig. 11 is a schematic top view of a projection apparatus provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of another receiving portion according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of another receiving portion according to an embodiment of the present application.

Reference numerals:

1: a storage section; 2: an optical engine; 3: a functional component; 4: a projection screen; 5: a heat sink;

11: a first receptacle portion; 12: a second receptacle portion; 13: a third receptacle portion;

111: a light-transmitting region; 112: an air inlet; 113: an air outlet; 114: filtering with a screen; 115: a first separator; 116: a second separator; 117: a third partition plate;

31: a control main board; 32: a power panel; 33: a display panel;

51: an exhaust fan; 52: a cooling fan.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.

Fig. 1 illustrates a schematic structural diagram of a projection apparatus according to an embodiment of the present application, and as shown in fig. 1, the projection apparatus includes: the projector comprises a receiving part 1, an optical engine 2, a functional assembly 3 and a projection screen 4. The receiving portion 1 is used for supporting on a supporting surface, and the receiving portion 1 is provided with a first receiving portion 11 and a second receiving portion 12; the optical engine 2 and the functional component 3 are located in the inner cavity of the first accommodating portion 11, the light emitting side of the first accommodating portion 11 is provided with a light transmitting area 111, the optical engine 2 is electrically connected with the functional component 3, and the optical engine 2 can emit light beams under the cooperation of the functional component 3 and transmit the light transmitting area 111; the second accommodating portion 12 has an opening, and the projection screen 4 can be accommodated in the second accommodating portion 12 based on the opening, or pass through the opening and be unfolded, and receive the light beam when the projection screen 4 is unfolded.

In the embodiment of the present application, as shown in fig. 2, when the projection apparatus is not used, the projection screen 4 can be accommodated in the second accommodating portion 12, so as to reduce the overall external dimension of the projection apparatus; as shown in fig. 1, when the projection apparatus is used, the projection screen 4 can pass through the opening and be unfolded, so that the light beam emitted from the optical engine 2 is received by the projection screen 4, the display of the picture on the projection screen 4 is realized, and the normal use of the projection apparatus is ensured. In addition, the optical engine 2 and the projection screen 4 are limited by the first accommodating part 11 and the second accommodating part 12, so that the optical engine 2 and the projection screen 4 are integrated, the phenomenon of relative displacement between the optical engine 2 and the projection screen 4 is avoided, and the display effect of pictures on the projection screen 4 is ensured.

Wherein, the supporting surface is the counter of the TV cabinet or the ground, etc.

Optionally, the first accommodating portion 11 and the second accommodating portion 12 are located on the same plane, so that when the projection screen 4 passes through the opening of the second accommodating portion 12 and is unfolded, the light beam emitted from the optical engine 2 can reach the projection screen 4 after passing through the light-transmitting area 111, thereby ensuring normal display of the picture.

Due to the large display screen characteristic of the projection apparatus, the receiving portion 1 has a certain length, that is, the first receiving portion 11 and the second receiving portion 12 are both rectangular frames having a certain length, and the length direction of the first receiving portion 11 is parallel to the length direction of the second receiving portion 12. In the ultra-short-focus projection apparatus, the optical engine 2 is closer to the projection screen 4, and therefore the width of the housing 1 is narrower, so that a partition is provided in the housing 1 in the longitudinal direction to divide the housing into the first housing portion 11 and the second housing portion 12.

Alternatively, the length of the first accommodating portion 11 is smaller than that of the second accommodating portion 12, and the accommodating portion 1 formed by the first accommodating portion 11 and the second accommodating portion 12 has a T-shaped structure. In order to facilitate the light beam emitted from the optical engine 2 in the first accommodating portion 11 to reach the central region of the projection screen 4, a straight line between the center point of the light-transmitting region 111 and the center point of the second accommodating portion 12 in the longitudinal direction is perpendicular to the longitudinal direction of the first accommodating portion 11.

Alternatively, as shown in fig. 1 or fig. 2, the length of the first accommodating portion 11 is equal to the length of the second accommodating portion 12, and the accommodating portion 1 formed by the first accommodating portion 11 and the second accommodating portion 12 has a rectangular frame structure. In order to facilitate the light beam emitted from the optical engine 2 in the first accommodating portion 11 to reach the central region of the projection screen 4, a straight line between the center point of the light-transmitting region 111 and the center point of the second accommodating portion 12 in the longitudinal direction is perpendicular to the longitudinal direction of the first accommodating portion 11.

When the length direction of the first accommodating portion 11 is parallel to the horizontal direction, if the projection screen 4 extends out of the second accommodating portion 12 in the upward direction, the light emitting side of the first accommodating portion 11 is the upward side, the opening of the second accommodating portion 12 is located at the upward side, that is, the light emitting side of the first accommodating portion 11 is the upper side of the second accommodating portion, and the opening of the second accommodating portion 12 is located at the upper side of the second accommodating portion.

In the embodiment of the present application, the projection device is an ultra-short-focus laser projection device, and correspondingly, the optical engine 2 is an ultra-short-focus optical engine. In this way, a short distance can be set between the optical engine 2 and the projection screen 4, thereby realizing a compact design of the projection apparatus. Illustratively, the ultra-short focus optical engine is a DLP (Digital Light processing) optical engine.

The optical engine 2 comprises a light source system, an illumination system and a lens system, wherein the light source system is connected with the illumination system, and the lens system is connected with the illumination system; the light source system and the lighting system are both electrically connected with the functional component 3 and complete the emergence of light beams under the cooperation of the functional component 3. When the optical engine 2 is an ultra-short focus optical engine 2, the lens system is an ultra-short focus projection lens.

Alternatively, a red, green, and blue three-primary-color solid-state laser is used as the Light source system, or a solid-state laser excites a fluorescent substance as the Light source system, or a solid-state laser is used in combination with an LED (Light-Emitting Diode) Light source as the Light source system. The three primary color light beams emitted by the light source system are integrated by a lens in the illumination system, and then irradiate the surface of a Digital Micromirror Device (DMD) in the illumination system, and after the light beams are rotated and reflected by the DMD, the light beams are emitted to the projection screen 4 through the lens system, so as to form a colorful picture. A DMD is a display chip that contains many small mirrors that can be flipped quickly.

In the embodiment of the present application, the projection screen 4 includes a screen, a curling assembly and a lifting assembly. The curling assembly is rotatably limited in the inner cavity of the second accommodating part 12, the first end of the lifting assembly is fixed in the inner cavity of the second accommodating part 12, the first side of the curtain sheet is fixedly connected with the curling assembly, and the curling assembly can rotate along the circumferential direction of the curling assembly so as to control the curtain sheet to be retracted into the inner cavity of the second accommodating part 12; the second side of curtain and lifting unit fixed connection, lifting unit can control the curtain and pass the opening and expand.

Wherein, first side is relative with the second side, and the structure of curling subassembly and lifting unit can refer to relevant technique, as long as can realize the packing up and the expansion of curtain, and this application embodiment is no longer repeated this.

In the embodiment of the present application, when the functional assembly 3 is matched with the optical engine 2 to emit a light beam, the functional assembly 3 generates heat, and the optical engine 2 also generates heat, so that the heat generated by the functional assembly 3 and the optical engine 2 is collected in the first accommodating portion 11, and the temperature in the first accommodating portion 11 is increased. In this way, in a high temperature environment, stability of the light beam emitted from the optical engine 2 is easily affected, so that a picture display effect on the projection screen 4 is affected, and a projection effect of the projection apparatus is reduced. For this reason, the first accommodating portion 11 needs to be heat-dissipated when the projection apparatus is used.

In some embodiments, the first accommodating portion 11 has a vent hole on a side opposite to the light emitting side, that is, the bottom side of the first accommodating portion 11 has a vent hole; or the first accommodating part 11 is provided with a vent hole on the side far away from the second accommodating part 12, namely the front side of the first accommodating part 11 is provided with a vent hole; or both sides of the first accommodating portion 11 in the length direction have ventilation holes, that is, both the left and right sides of the first accommodating portion 11 have ventilation holes. Like this, first holding portion 11 can realize the inner chamber of first holding portion 11 and the natural convection of external environment based on the ventilation hole that itself has, and then realizes the heat dissipation to first holding portion 11, has avoided the higher phenomenon of temperature in first holding portion 11, can also avoid extra noise to produce the influence to the projection effect simultaneously.

Naturally, the arrangement of the vent holes can also be a combination of at least two of the above. For example, the first accommodating portion 11 has vent holes on both the side opposite to the light emitting side and the side far from the second accommodating portion 12, that is, both the front side and the bottom side of the first accommodating portion 11 have vent holes; or the first accommodating part 11 and the first accommodating part 11 opposite to the light emitting side have vent holes in both sides in the length direction, that is, the bottom side and the left side of the first accommodating part 11, or the bottom side and the right side have vent holes; or the first accommodating part 11 has through holes on both the side away from the second accommodating part 12 and the side in the longitudinal direction, that is, the front side and the left side of the first accommodating part 11, or the front side and the right side have ventilation holes.

The above description is defined in the case where the lengthwise direction of the first accommodating portion 11 and the lengthwise direction of the second accommodating portion 12 are both parallel to the horizontal direction, and the projection screen 4 protrudes to the upward direction for the second accommodation. When the projection screen 4 extends out of the second accommodating portion 12 in a downward direction, or both the length direction of the first accommodating portion 11 and the length direction of the second accommodating portion 12 are perpendicular to the horizontal direction, and the projection screen 4 extends out of the second accommodating portion in a left direction, the first accommodating portion 11 is correspondingly limited on one side opposite to the light emitting side and on both sides in the length direction, which is not limited in the embodiment of the present application.

When the first accommodating portion 11 has the vent hole on the side opposite to the light emitting side, in order to avoid the influence of the convection of the gas between the inner cavity of the first accommodating portion 11 and the external environment and the influence of the heat dissipation effect of the first accommodating portion 11 caused by the closer distance between the supporting surface and the bottom side of the first accommodating portion 11, the height difference between the side opposite to the light emitting side of the first accommodating portion 11 and the supporting surface is greater than or equal to the reference height.

The reference height can be determined according to the power of the optical engine 2 and the overall height of the first accommodating portion 11. The larger the power of the optical engine 2 is, the more the heat generated by the optical engine 2 per unit time is, and in this case, the reference height is set to a larger value for fast heat dissipation and for avoiding the influence on the aesthetic quality due to the higher height of the first accommodating portion 11. Illustratively, the reference height is 12 cm, and the height difference between the side of the first accommodating portion 11 opposite to the light exit side and the supporting surface is 15 cm.

In addition, when the supporting surface for supporting the first receiving portion 11 is a ground surface, in order to avoid that the heat emitted along the ground surface after the ground surface is heated affects the convection of the air in the first receiving portion 11 and the external environment, the first receiving portion 11 further has a heat insulation plate, the heat insulation plate is fixed below the first receiving portion 11, and the height difference between the heat insulation plate and the side of the first receiving portion 11 opposite to the light emitting side is greater than or equal to the reference height. Thus, the influence of the heat emitted from the ground on the heat dissipation of the first accommodating part can be isolated through the heat insulation plate, and the heat dissipation effect of the first accommodating part 11 is ensured.

When the first accommodating part 11 has the vent hole at one side in the length direction, in order to secure the heat dissipation effect of the first accommodating part 11, a distance between one side of the first accommodating part 11 in the length direction and the corresponding wall surface is greater than or equal to a second reference distance. The determination method of the second reference distance may be the same as or similar to the determination method of the reference height described above, and this is not limited in this embodiment of the application. Illustratively, the second reference distance is 12 cm, and the distances between one side of the first accommodating portion 11 in the length direction and the corresponding wall surface are 15 cm.

In the embodiment of the application, the heat dissipation can be realized based on the natural convection of the vent holes. At this time, the vent holes in the first accommodating portion 11 are distributed in a grid shape, so that the convection passage of the gas can be increased, and the heat dissipation effect of the first accommodating portion 11 is ensured.

Wherein, the vent holes on the first accommodating portion 11 are distributed in a grid shape. For example, when the first accommodating portion 11 has vent holes on a side opposite to the light emitting side, the vent holes are distributed in a grid shape on the side opposite to the light emitting side of the first accommodating portion 11; when the first accommodating part 11 has vent holes on one side far away from the second accommodating part 12, the vent holes are distributed in a grid shape on one side far away from the second accommodating part 12 on the first accommodating part 11; when the first accommodating part 11 has vent holes on both sides in the length direction, the vent holes are distributed in a grid shape on both sides of the first accommodating part 11 in the length direction; when one side of keeping away from second holding portion 12 on the first holding portion 11 and one side opposite to the light-emitting side all have the ventilation hole, the ventilation hole of keeping away from one side of second holding portion on the first holding portion and the ventilation hole of one side opposite to the light-emitting side on the first holding portion all are latticed distribution.

Of course, in the embodiment of the present application, forced convection can be achieved through the heat dissipation device 5 based on the vent holes to dissipate heat, that is, as shown in any one of fig. 3 to 8, the projection apparatus further includes the heat dissipation device 5, and at this time, the heat dissipation device 5 is located in the inner cavity of the first accommodating portion 11. In this way, when the functional assembly 3 and the optical engine 2 generate a large amount of heat, the heat dissipation device 5 can accelerate the convection speed between the high-temperature gas in the first accommodating portion 11 and the low-temperature gas in the external environment, thereby ensuring the heat dissipation effect of the first accommodating portion 11.

When heat is dissipated through the heat dissipation device 5, the vent holes in the first accommodating portion 11 include an air inlet 112 and an air outlet 113, and the air inlet 112 and the air outlet 113 are located on two sides of the optical engine 2. In this way, the heat dissipation device 5 is configured to drive the gas in the inner cavity of the first accommodating portion 11 to flow based on the air inlet 112 and the air outlet 113, so as to replace the high-temperature gas in the first accommodating portion 11 with the low-temperature gas in the external environment, thereby achieving heat dissipation of the first accommodating portion 11.

Alternatively, the air inlet 112 is located at the left side of the optical engine 2, and the air outlet 113 is located at the right side of the optical engine 2; or the intake port 112 is located at the right side of the optical engine 2 and the exhaust port 113 is located at the left side of the optical engine 2.

As shown in fig. 3, when the first accommodating portion 11 has a vent hole on a side opposite to the light emitting side, the vent hole on the side opposite to the light emitting side of the first accommodating portion 11 includes an air inlet 112 and an air outlet 113; as shown in fig. 4, when the first accommodating portion 11 has a vent hole on a side away from the second accommodating portion 12, the vent hole on the side away from the second accommodating portion 12 of the first accommodating portion 11 includes an air inlet 112 and an air outlet 113; as shown in fig. 5, when the first accommodating portion 11 has vent holes on both sides in the longitudinal direction, the vent on one side of the first accommodating portion 11 in the longitudinal direction is an air inlet 112, and the vent on the other side of the first accommodating portion 11 in the longitudinal direction is an air outlet 113; as shown in fig. 6, when the first accommodating portion 11 has vent holes on both the side opposite to the light emitting side and the side far from the second accommodating portion 12, the vent hole on the side opposite to the light emitting side of the first accommodating portion 11 is an air inlet 112, and the vent hole on the side far from the second accommodating portion 12 of the first accommodating portion 11 is an air outlet 113; as shown in fig. 7, when the first accommodating portion 11 has vent holes on both the side opposite to the light emitting side and the side of the first accommodating portion 11 in the length direction, the vent hole on the side of the first accommodating portion 11 opposite to the light emitting side is an air inlet 112, and the vent hole on the side of the first accommodating portion 11 in the length direction is an air outlet 113; as shown in fig. 8, when the first accommodating portion 11 has through holes on both the side away from the second accommodating portion 12 and the side in the longitudinal direction, the vent hole on the side away from the second accommodating portion 12 of the first accommodating portion 11 is an air inlet 112, and the vent hole on the side in the longitudinal direction of the first accommodating portion 11 is an air outlet 113.

In some embodiments, as shown in fig. 9, the heat dissipation device 5 includes an exhaust fan 51, and the exhaust fan 51 is located in the inner cavity of the first accommodating portion 11 and located on the same side of the optical engine 2 as the air outlet 113.

When the air outlet 113 is located on one side of the first accommodating portion 11 along the length direction, the air outlet side of the exhaust fan 51 faces the air outlet 113, and the air outlet side of the exhaust fan 51 faces away from the optical engine 2. In this way, the high-temperature gas in the first accommodating portion 11 can be directly sucked by the exhaust fan 51 and directly discharged to the external environment along the air outlet 113.

When the air outlet 113 is located on the side of the first accommodating portion 11 opposite to the light emitting side or on the side of the first accommodating portion 11 away from the second accommodating portion 12, the air outlet side of the exhaust fan 51 faces the air outlet 113, or the air outlet side of the exhaust fan 51 faces away from the optical engine 2.

When the air outlet side of the exhaust fan 51 faces the air outlet 113, the exhaust fan 51 can directly discharge the air drawn from the first accommodating portion 11 to the external environment along the air outlet 113. When the air outlet side of the exhaust fan 51 faces away from the optical engine 2, the exhaust fan 51 is located between the optical engine 2 and the air outlet 113, and the exhaust fan 51 can directly suck the high-temperature gas in the first accommodating portion 11 and discharge the high-temperature gas to the position of the air outlet 113, so as to be discharged along the air outlet 113.

When the high-level gas in the first accommodating portion 11 is sucked by the exhaust fan 51, a negative pressure environment is formed in the first accommodating portion 11, and at this time, the low-temperature gas in the external environment easily enters the first accommodating portion 11 along the air inlet 112, so that the high-temperature gas in the first accommodating portion 11 is replaced, and the heat dissipation of the first accommodating portion 11 is realized.

In other embodiments, as shown in fig. 9, the heat dissipation device 5 includes a cooling fan 52, and the cooling fan 52 is located in the inner cavity of the first accommodating portion 11 and is located on the same side of the optical engine 2 as the air inlet 112.

When the air inlet 112 is located at one side of the first accommodating portion 11 along the length direction, the air outlet side of the cooling fan 52 faces the optical engine 2, and the air outlet side of the cooling fan 52 faces away from the air inlet 112. In this way, the cold air fan 52 can directly suck the low-temperature gas in the external environment along the air inlet 112, and then the sucked low-temperature gas is discharged into the first accommodating portion 11.

When the air inlet 112 is located on the side of the first accommodating portion 11 opposite to the light emitting side or on the side of the first accommodating portion 11 far from the second accommodating portion 12, the air outlet side of the cooling fan 52 faces away from the air inlet 112, or the air outlet side of the cooling fan 52 faces toward the optical engine 2.

When the air outlet side of the cooling air fan 52 faces away from the air inlet 112, the cooling air fan 52 can directly suck the low-temperature gas in the external environment along the air inlet 112, and then discharge the sucked low-temperature gas into the first accommodating portion 11. When the air outlet side of the cooling fan 52 faces the optical engine 2, the cooling fan 52 is located between the optical engine 2 and the air inlet 112, and at this time, the cooling fan 52 can suck the low-temperature gas at the position of the air inlet 112 and directly discharge the sucked low-temperature gas into the first accommodating portion 11.

When the cooling fan 52 discharges the pumped low-temperature gas into the first accommodating portion 11, a high-pressure environment is formed in the first accommodating portion 11, and at this time, the high-temperature gas in the first accommodating portion 11 flows out to the external environment along the air outlet 113 easily, so that the high-temperature gas in the first accommodating portion 11 is replaced, and the heat dissipation of the first accommodating portion 11 is realized.

In some embodiments, as shown in fig. 9 or fig. 10, the heat dissipation device 5 includes an exhaust fan 51 and a cooling fan 52, the cooling fan 52 and the exhaust fan 51 are located in the inner cavity of the first accommodating portion 11, the cooling fan 52 and the air inlet 112 are located on the same side of the optical engine 2, and the exhaust fan 51 and the air outlet 113 are located on the same side of the optical engine.

The direction of the air outlet side of the cooling air fan 52 and the direction of the air outlet side of the exhaust air fan 51 are combinations of any one of the above embodiments and any one of the above other embodiments, which is not limited in the embodiments of the present application. Illustratively, the air inlet side of cold air fan 52 faces air inlet 112, and the air outlet side of exhaust air fan 51 faces optical engine 2.

Note that, in the case where the heat dissipation device 5 includes the exhaust fan 51 and/or the cool air fan 52, the number of the exhaust fans 51 and the number of the cool air fans 52 are at least one.

Alternatively, when the heat dissipation device 5 dissipates heat from the first accommodating portion 11, the flow rate of the gas in the first accommodating portion 11 is fast due to forced convection, and thus the flow rate of the gas at the air inlet 112 is fast, so that the impurities are easily sucked into the first accommodating portion 11.

For this purpose, as shown in fig. 11, the first accommodating portion 11 further includes a filter 114, the filter 114 is located in the inner cavity of the first accommodating portion 11 and between the air inlet 112 and the optical engine 2, and a plane of the filter 114 is perpendicular to a flow direction of the air in the first accommodating portion 11. In this way, the gas flowing into the first receptacle 11 can be filtered by the filter screen 114, so that the impurities can be blocked without affecting the flow of the gas. The flowing direction of the gas is the length direction of the first accommodating portion 11.

When the heat dissipation device 5 includes the cooling fan 52, the filter 114 is located between the air inlet 112 and the cooling fan 52, so as to prevent impurities from being sucked into the cooling fan 52, which causes the problem of jamming of the cooling fan 52.

In the embodiment of the present application, the first accommodating portion 11 further has a supporting frame. The support frame includes a leg and a grid-shaped support plate, one end of the leg is connected to the inner wall of the first accommodating portion 11, the support plate is supported on the leg, and the optical engine 2 is located on the support plate. In this way, the heat generated by the optical engine 2 can be diffused also to the lower side of the optical engine 2 based on the mesh-shaped support plate, thereby increasing the heat dissipation area of the optical engine 2. In addition, the support legs do not obstruct the flow of gas due to the large pores between the support legs.

Optionally, the support frame further comprises a heat dissipation fin, and one side edge of the heat dissipation fin is fixedly connected with the bottom surface of the support plate. Through being connected between radiating fin and the backup pad like this, the heat that optical engine 2 produced can also transmit to radiating fin through the backup pad, and then dispels the heat through radiating fin, has increased optical engine 2's heat radiating area, has improved optical engine 2's radiating effect.

Optionally, the surface of the heat dissipation fin is parallel to the gas flow direction in the first accommodating portion 11, so that the obstruction of the heat dissipation fin to the gas flow can be avoided.

In the embodiment of the present application, when the heat dissipation device 5 dissipates heat from the first accommodating portion 11 based on the air outlet 113 and the air inlet 112, the air outlet 113 and the air inlet 112 may be located on the same side of the first accommodating portion 11, that is, the air outlet 113 and the air inlet 112 are located on the opposite side of the first accommodating portion 11 from the light emitting side, or located on the side of the first accommodating portion 11 away from the second accommodating portion 12, at this time, in order to ensure the heat dissipation effect of the first accommodating portion 11, in some embodiments, the distance between the air outlet 113 and the air inlet 112 is greater than or equal to the first reference distance. In this way, the distance between the air outlet 113 and the air inlet 112 is relatively long due to the definition of the first reference distance, so that the influence of the high-temperature gas flowing out of the first accommodating portion 11 along the air outlet 113 on the low-temperature gas flowing into the first accommodating portion 11 at the air inlet 112 can be avoided.

The determination method of the first reference distance may be the same as or similar to the determination method of the reference height described above, and this is not limited in this embodiment of the application. Illustratively, the first reference distance is 12 cm, and the distance between the air outlet 113 and the air inlet 112 is 15 cm.

In other embodiments, as shown in fig. 12, the first accommodating portion 11 has a first partition 115, the first partition 115 is located outside the first accommodating portion 11, the first partition 115 is fixedly connected to a side of the first accommodating portion 11 where the air inlet 112 and the air outlet 113 are located, and the first partition 115 is located between the air outlet 113 and the air inlet 112. In this way, the first partition plate 115 can block the convection of the air between the air inlet 112 and the air outlet 113, that is, the high-temperature air at the air outlet 113 can be prevented from flowing to the air inlet 112, so that the heat dissipation effect of the first accommodating portion 11 can be ensured.

In order to ensure the aesthetic property of the projection apparatus and avoid the first partition 115 from affecting the overall width of the projection apparatus, when the air inlet 112 and the air outlet 113 are both located on the side of the first accommodating portion 11 opposite to the light emitting side, the first accommodating portion 11 may have the first partition 115. That is, when the air inlet 112 and the air outlet 113 are both located on the side of the first accommodating portion 11 away from the second accommodating portion 12, the first accommodating portion 11 does not have the first partition 115. The overall width of the projection device is a dimension perpendicular to the plane of the projection screen 4 when the projection screen 4 is unfolded.

In still other embodiments, the first housing portion 11 has a first guide member, or the first housing portion 11 has a second guide member, or the first housing portion 11 has both a first guide member and a second guide member.

When the first accommodating portion 11 has the first guide member, the first guide member is connected to an edge of the air outlet 113, and the first guide member is used for guiding the air flowing through the air outlet 113 to a direction away from the air inlet 112. In this way, the high-temperature gas flowing out of the air outlet 113 can be guided by the first guide member, thereby avoiding the mutual convection with the low-temperature gas at the air inlet 112.

Wherein, the first guide component is a shutter or a guide pipe. When the first guide member is a guide pipe, the guide pipe is located outside the first accommodating portion 11, and of course, the guide pipe is located in the inner cavity of the first accommodating portion 11 so as not to affect the appearance of the first accommodating portion 11.

If the guiding tube is located outside the first accommodating portion 11, the first end of the guiding tube is connected to the edge of the air outlet 113, and the second end of the guiding tube faces the direction away from the air inlet 112, so as to guide the high-temperature gas flowing out of the air outlet 113 to the direction away from the air inlet 112.

If the guiding tube is located in the inner cavity of the first accommodating portion 11, the first end of the guiding tube is connected to the edge of the air outlet 113, and the second end of the guiding tube faces the direction close to the air inlet 112, so as to guide the high-temperature gas flowing out of the air outlet 113 to the direction far away from the air inlet 112. Wherein, the second end of the guide pipe is of a bell mouth-shaped structure.

When the first accommodating portion 11 has the second guiding portion, the second guiding portion is connected to the edge of the air inlet 112, and the second guiding portion is used for guiding the air away from the air outlet 113 to the air inlet 112. In this way, the gas in the direction away from the outlet 113 can be guided by the second guide member, thereby avoiding the convection with the high-temperature gas at the outlet 113.

Wherein, the second guiding component is a shutter or a guiding pipe. When the second guide member is a guide pipe, the guide pipe is located outside the first accommodating portion 11, and of course, the guide pipe is located in the inner cavity of the first accommodating portion 11 so as not to affect the appearance of the first accommodating portion 11.

If the guiding tube is located outside the first accommodating portion 11, the first end of the guiding tube is connected to the edge of the air inlet 112, and the second end of the guiding tube faces the direction away from the air outlet 113, so as to guide the low-temperature gas away from the air outlet 113 to the air inlet 112. Wherein, the second end of the guide pipe is of a bell mouth-shaped structure.

If the guiding tube is located in the inner cavity of the first accommodating portion 11, the first end of the guiding tube is connected to the edge of the air inlet 112, and the second end of the guiding tube faces the direction close to the air outlet 113, so as to guide the low-temperature gas far away from the air outlet 113 to the air inlet 112.

When the first accommodating portion 11 has both the first guide portion and the second guide member, the connection position and the connection manner of the first guide member are the connection position and the connection manner described above when the first guide member is included alone, and the connection position and the connection manner of the second guide member are the connection position and the connection manner described above when the second guide member is included alone, which is not limited in the embodiment of the present application.

Optionally, the first guide member and the second guide member have the same structure, and exemplarily, the first guide member and the second guide member are both louvers. Or the first guide component and the second guide component have different structures, for example, the first guide component is a shutter, and the second guide component is a guide pipe.

In order to ensure the aesthetic appearance of the projection apparatus and avoid affecting the overall width of the projection apparatus in the case where the first accommodating portion 11 has at least one of the first guide member and the second guide member, when the air inlet 112 and the air outlet 113 are both located on the side of the first accommodating portion 11 opposite to the light emitting side, at least one of the first guide member and the second guide member is a louver or a guide pipe; when the air inlet 112 and the air outlet 113 are both located on the side of the first accommodating portion 11 away from the second accommodating portion 12, at least one of the first guide member and the second guide member is a louver.

In this embodiment, in order to avoid direct exposure of the air inlet 112 and the air outlet 113, the first accommodating portion 11 further has a first decorative sheet and a second decorative sheet, the first decorative sheet and the second decorative sheet both have through holes, the first decorative sheet is connected with the edge of the air inlet 112, and the second decorative sheet is connected with the edge of the air outlet 113. In this way, the decoration by the first and second decorative sheets increases the overall aesthetic appearance of the projection device.

It should be noted that, when the air inlet 112 and the air outlet 113 are connected to a guiding component, based on the shielding of the guiding component, no decorative sheet is required to be disposed at the air inlet 112 and the air outlet 113, that is, the air inlet 112 is not required to be disposed with a first decorative sheet, and the air outlet 113 is not required to be disposed with a second decorative sheet.

The functional component 3 will be described next.

In the embodiment of the present application, as shown in fig. 9, 10 or 11, the functional assembly 3 includes a power board 32 and a display board 33, the power board 32 and the display board 33 are located in the cavity of the first accommodating portion 11, the power board 32 and the display board 33 are electrically connected, the display board 33 and the power board 32 are both electrically connected to the optical engine 2, and the plane of the display board 33 is parallel to the flow direction of the gas in the first accommodating portion 11.

The power board 32 can output a voltage or current driving signal, thereby facilitating power supply for the display panel 33 and the optical engine 2. The display panel 33 receives the video signal, converts the video signal into a driving signal, and transmits the driving signal to the DMD panel included in the optical engine 2, so that the DMD panel drives the micromirrors on the DMD to deflect based on the driving signal, so that the DMD emits light beams onto the projection screen 4, and the display of the picture is realized on the projection screen 4.

Since the distance between the display panel 33 and the optical engine 2 may not be too far, and at the same time, in order to avoid the surface where the display panel 33 is located from obstructing the flow of the gas, the display panel 33 is located above the optical engine 2 to the left or the right, or is disposed on the side of the optical engine 2 close to the second accommodating portion 12, that is, the display panel 33 is located between the side of the first accommodating portion 11 close to the second accommodating portion 12 and the optical engine 2; or on the side of the optical engine 2 away from the second accommodating portion 12, that is, the display panel 33 is located between the side of the first accommodating portion 11 away from the second accommodating portion 12 and the optical engine 2. Of course, the display panel 33 may be disposed at other positions as long as the distance between the display panel 33 and the optical engine 2 is ensured and the display panel 33 is prevented from obstructing the flow of the gas in the first accommodating portion 11, which is not limited in the embodiment of the present application.

When the first accommodating portion 11 is heat-dissipated by the heat dissipating device 5, the plane of the power supply board 32 is perpendicular to or parallel to the flow direction of the gas in the first accommodating portion 11.

The plane of the power board 32 is perpendicular to the gas flowing direction in the first accommodating portion 11. In order to prevent the power board 32 from obstructing the flow of the gas in the first accommodating portion 11, the power board 32 and the air inlet 112 are located on the same side of the optical engine 2, and the distance between the power board 32 and the optical engine 2 is greater than the distance between the air inlet 112 and the optical engine 2, that is, the air inlet 112 is located between the power board 32 and the optical engine 2; or the power board 32 and the air outlet 113 are located on the same side of the optical engine 2, and a distance between the power board 32 and the optical engine 2 is greater than a distance between the air inlet 112 and the optical engine 2, that is, the air outlet 113 is located between the power board 32 and the optical engine 2.

As shown in fig. 9, 10 or 11, the plane of the power supply board 32 is parallel to the gas flowing direction in the first accommodating portion 11. The power board 32 and the air inlet 112 are located on the same side of the optical engine 2, and a distance between the power board 32 and the optical engine 2 is smaller than a distance between the air inlet 112 and the optical engine 2, that is, the power board 32 is located between the air inlet 112 and the optical engine 2; or the power board 32 and the air outlet 113 are located on the same side of the optical engine 2, and the distance between the power board 32 and the optical engine 2 is smaller than the distance between the air inlet 112 and the optical engine 2, that is, the power board 32 is located between the air outlet 113 and the optical engine 2; or the power panel 32 is located between the side of the first accommodating portion 11 away from the second accommodating portion 12 and the optical engine 2; or the power board 32 is located between the optical engine 2 and a side of the first accommodating portion 11 close to the second accommodating portion 12.

Of course, the plane of the power board 32 may be at other angles besides perpendicular to or parallel to the gas flowing direction, that is, the included angle between the plane of the power board 32 and the gas flowing direction is 90 degrees or 0 degree, as long as the power board 32 does not obstruct the flow of the gas in the first accommodating portion 11, which is not limited in the embodiment of the present application.

Note that, when at least one of the air inlet 112 and the air outlet 113 is located on one side of the first accommodating portion 11 in the longitudinal direction, in order to prevent the power supply board 32 from obstructing the flow of the gas, the plane on which the power supply board 32 is located cannot be perpendicular to the flow direction of the gas in the first accommodating portion 11. For example, when the air inlet 112 is located on one side of the first accommodating portion 11 in the length direction, if the power supply board 32 and the air inlet 112 are located on the same side of the optical engine 2, the plane on which the power supply board 32 is located cannot be perpendicular to the flow direction of the gas in the first accommodating portion 11.

Optionally, as shown in fig. 9, 10 or 11, the functional assembly 3 further includes a control main board 31, the control main board 31 is located in the inner cavity of the first accommodating portion 11, and the control main board 31 is electrically connected to the display panel 33.

The control main board 31 is a Television (TV) main board, and the control main board 31 has an external port for connecting a computer, a mobile phone, and a flash disk. Thus, the control main board 31 can receive the audio and video signals transmitted by a computer, a mobile phone, a flash disk and the like, decode the audio and video signals to obtain video signals, and transmit the video signals to the display panel 33.

When the heat is dissipated from the first accommodating portion 11 by the heat dissipating device 5, the plane of the control main plate 31 is perpendicular to or parallel to the flow direction of the gas in the first accommodating portion 11.

As shown in fig. 9 or 10, the control main plate 31 is located on a plane perpendicular to the gas flow direction in the first accommodating portion 11. In order to avoid the control main board 31 obstructing the flow of the air in the first accommodating portion 11, the control main board 31 and the air inlet 112 are located on the same side of the optical engine 2, and the distance between the control main board 31 and the optical engine 2 is greater than the distance between the air inlet 112 and the optical engine 2, that is, the air inlet 112 is located between the control main board 31 and the optical engine 2; or the control main board 31 and the air outlet 113 are located on the same side of the optical engine 2, and a distance between the control main board 31 and the optical engine 2 is greater than a distance between the air inlet 112 and the optical engine 2, that is, the air outlet 113 is located between the control main board 31 and the optical engine 2.

As shown in fig. 11, the control main plate 31 is located on a plane parallel to the gas flow direction in the first accommodating portion 11. The control motherboard 31 and the air inlet 112 are located on the same side of the optical engine 2, and a distance between the control motherboard 31 and the optical engine 2 is smaller than a distance between the air inlet 112 and the optical engine 2, that is, the control motherboard 31 is located between the air inlet 112 and the optical engine 2; or the control main board 31 and the air outlet 113 are located on the same side of the optical engine 2, and the distance between the control main board 31 and the optical engine 2 is smaller than the distance between the air inlet 112 and the optical engine 2, that is, the control main board 31 is located between the air outlet 113 and the optical engine 2; or the control main board 31 is located between the optical engine 2 and the side of the first accommodating portion 11 away from the second accommodating portion 12; or the control main board 31 is located between the optical engine 2 and a side of the first accommodating portion 11 close to the second accommodating portion 12.

Of course, the plane where the control main plate 31 is located may be at other angles besides perpendicular to or parallel to the gas flowing direction, that is, the included angle between the plane where the control main plate 31 is located and the gas flowing direction is 90 degrees or 0 degree, as long as the control main plate 31 does not obstruct the flow of the gas in the first accommodating portion 11, which is not limited in the embodiment of the present application.

Note that, when at least one of the air inlet 112 and the air outlet 113 is located on one side of the first accommodating portion 11 in the longitudinal direction, in order to prevent the control main plate 31 from obstructing the flow of the gas, the plane on which the control main plate 31 is located cannot be perpendicular to the flow direction of the gas in the first accommodating portion 11. For example, when the air inlet 112 is located on one side of the first accommodating portion 11 in the length direction, if the control main board 31 and the air inlet 112 are located on the same side of the optical engine 2, the plane on which the control main board 31 is located cannot be perpendicular to the flow direction of the gas in the first accommodating portion 11.

Optionally, the functional assembly 3 further includes a remote controller, the remote controller is located in the inner cavity of the first accommodating portion 11, and the remote controller is electrically connected to the control main board 31. The remote controller is capable of determining a remote control signal and transmitting the determined remote control signal to the control main board 31, so that the control main board 31 controls the switching of the display screen imaged by the optical engine 2 based on the remote control signal. The remote controller is located between the air inlet 112 and the optical engine 2, or between the air outlet 113 and the optical engine 2.

The remote controller includes a key electrically connected to the control board 31. In this way, the remote controller can detect the triggering of the key by the user to determine the corresponding remote control signal. The keys comprise a power key, a volume key, a picture switching key and the like, and the keys are physical keys or virtual keys.

Optionally, the functional assembly 3 further includes a wireless module, the wireless module is located in the inner cavity of the first accommodating portion 11, and the wireless module is electrically connected to the control main board 31.

The Wireless module comprises a Bluetooth module and/or a WIFI (Wireless-Fidelity) module. The WIFI module is used for accessing the projection device to the wireless internet, and further transmitting the audio data transmitted by the wireless internet to the control main board 31. The wireless module is located between the air inlet 112 and the optical engine 2, or between the air outlet 113 and the optical engine 2.

Optionally, in the embodiment of the present application, when the functional component 3 does not include the control motherboard 31, the display panel 33 is connected to an external port, so as to be connected to a computer, a mobile phone, a flash disk, and the like through the external port, so as to receive a video signal transmitted by the computer, the mobile phone, the flash disk, and the like.

The functional assembly 3 provided by the embodiment of the present application may include one or more of the above structures, and the positions of each structure can be freely combined.

Illustratively, as shown in fig. 11, the functional components 3 include a control main board 31, a display board 33, and a power supply board 32; the control main board 31, the display board 33 and the power board 32 are all located in the inner cavity of the first accommodating portion 11, the control main board 31 is electrically connected with the display board 33, the display board 33 is electrically connected with the optical engine 2, and the power board 32 is electrically connected with the control main board 31, the display board 33 and the optical engine 2 respectively. The plane of the control main board 31, the plane of the display panel 33, and the plane of the power panel 32 are all parallel to the flow direction of the air in the first accommodating portion 11, the control main board 31 and the power panel 32 are both located between the air outlet 113 and the optical engine 2, and the display panel 33 is located on the optical engine 2 on a side close to the second accommodating portion 12.

When the functional component 3 includes multiple structures, the multiple structures are located on the same side of the optical engine 2 in order to facilitate electrical connections between the multiple structures. When the plane where the two structures exist in the multiple structures is perpendicular to the flowing direction of the gas, the two structures are respectively located on two sides of the optical engine 2 to avoid the two structures from obstructing the flowing of the gas.

If the at least one structure included in the functional component 3 is located on the same side as the air inlet 112, the at least one structure is preferentially cooled when the first accommodating portion 11 is cooled, and then the optical engine 2 is cooled. Like this, preferentially cool down to at least one structure, can avoid the problem to at least one structure secondary heating. If the at least one structure included in the functional component 3 is located on the same side as the air outlet 113, the optical engine 2 is preferentially cooled when the first accommodating portion 11 is cooled, and then the at least one structure is cooled. In this way, when the light source system included in the optical engine 2 is sensitive to temperature, the optical engine 2 is preferentially cooled, so that the stability of the light emitted from the optical engine 2 can be better ensured.

In the embodiment of the application, in the using process of the projection equipment, the auxiliary device can be used, and the auxiliary device comprises a sound box, a set top box and the like. The first accommodating portion 11 further has a storage space for accommodating the auxiliary device.

In some embodiments, as shown in fig. 9 or 10, the first receptacle 11 also has a second partition 116 and a third partition 117; the second partition 116 and the third partition 117 are located in the inner cavity of the first accommodating portion 11, the second partition 116 and the inner wall of the first accommodating portion 11 enclose a first cavity, the second partition 116, the third partition 117 and the inner wall of the first accommodating portion 11 enclose a second cavity, the third partition 117 and the inner wall of the first accommodating portion 11 enclose a third cavity, and the optical engine 2 and the functional component 3 are located in the second cavity.

The auxiliary device is contained in the first cavity and the second cavity. The heat emitted from the optical engine 2 and the functional assembly 3 may be accumulated in the second cavity, and at this time, the air inlet 112 and the air outlet 113 described above are communicated with the second cavity, and neither the air inlet 112 nor the air outlet 113 is located on one side of the first accommodating portion 11 in the length direction.

When the functional module 3 includes the control motherboard, in order to facilitate connection between the external port of the control motherboard and the external device, if the control motherboard and the air inlet 112 are located on the same side, the second partition 116 close to the air inlet 112 has a connection hole, and the external port of the control motherboard passes through the connection hole and is located in the first cavity. Therefore, the external equipment contained in the first cavity can be connected with the external port of the control mainboard.

In other embodiments, the first accommodating portion 11 further has a fourth partition; the fourth partition is located in the inner cavity of the first accommodating portion 11, the fourth partition divides the inner cavity of the first accommodating portion 11 into a fourth cavity and a fifth cavity, and the optical engine 2 and the functional component 3 are located in the fourth cavity.

Wherein, the auxiliary device is accommodated in the fifth cavity. The heat emitted from the optical engine 2 and the functional component 3 may be accumulated in the fourth cavity, and at this time, the air inlet 112 and the air outlet 113 described above are both communicated with the fourth cavity, and one of the air inlet 112 and the air outlet 113 is located on one side of the first accommodating portion 11 in the length direction, or neither the air inlet 112 nor the air outlet 113 is located on one side of the first accommodating portion 11 in the length direction.

For example, the air inlet 112 is located on one side of the first accommodating portion 11 in the length direction, the air outlet 113 is located on the opposite side of the first accommodating portion 11 from the light emitting side, and the air outlet 113 is located between the optical engine 2 and the fourth partition plate.

When the functional component 3 includes the control main board and is close to the fourth partition board and is the air outlet 113, in order to facilitate connection between the external port of the control main board and the external device, the control main board and the air outlet 113 are located on the same side, at this moment, the fourth partition board has a connecting hole, and the external port of the control main board passes through the connecting hole and is located in the fifth cavity. Therefore, the external equipment accommodated in the first cavity can be connected with the external port of the control mainboard.

Note that, with both of the above embodiments, in order to facilitate the storage of the auxiliary device in the first accommodating portion 11, the first accommodating portion 11 has a certain length. For example, the receiving portion 1 has a rectangular frame structure, that is, the length of the first receiving portion 11 is equal to the length of the second receiving portion 12.

In some embodiments, as shown in fig. 13, the receiving portion 1 further has a third receiving portion 13, and the third receiving portion 13 is located below the first receiving portion 11. Thus, the auxiliary device can be housed in the third housing portion 13.

At this time, the air inlet 112 and the air outlet 113 described above communicate with the fourth chamber. At this time, the air inlet 112 and the air outlet 113 are not located on the opposite side of the first accommodating portion 11 from the light emitting side, so as to prevent the high temperature gas flowing out along the air outlet 113 from entering the third accommodating portion 13, which causes a higher temperature phenomenon in the third accommodating portion 13.

When the functional module 3 includes a control main board, the bottom surface of the first accommodating portion 11 has a connecting hole communicated with the third accommodating portion 13, and an external port of the control main board passes through the connecting hole and is located in the inner cavity of the third accommodating portion 13. The external device accommodated in the third accommodating portion 13 can be connected to the external port of the control board.

In the embodiment of the application, when the projection device is not used, the projection screen can be accommodated in the second accommodating part, so that the overall appearance size of the projection device is reduced; when the projection equipment is used, the projection screen can penetrate through the opening and is unfolded, so that the light beams emitted by the optical engine are received through the projection screen, the display of pictures on the projection screen is realized, and the normal use of the projection equipment is ensured. In addition, the optical engine and the projection screen are limited by the first accommodating part and the second accommodating part, so that the optical engine and the projection screen are integrated, the phenomenon of relative displacement between the optical engine and the projection screen is avoided, and the display effect of pictures on the projection screen is ensured. In addition, through set up the ventilation hole on first holding portion to the heat dissipation of the first holding portion of being convenient for under heat abstractor's effect has guaranteed the stability that optical engine exited the light beam, has guaranteed projection equipment's projection effect.

The above description is only illustrative of the embodiments of the present application and is not intended to limit the embodiments of the present application, and any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims

1. A projection device, characterized in that the projection device comprises: the projector comprises a containing part, an optical engine, a functional assembly and a projection screen;

2. The projection device of claim 1, wherein the vent includes an air inlet and an air outlet, the air inlet and the air outlet located on opposite sides of the optical engine;

3. The projection apparatus of claim 2, wherein the heat dissipation device comprises an exhaust fan, the exhaust fan is located in the inner cavity of the first accommodating portion and located on the same side of the optical engine as the air outlet, and an air outlet side of the exhaust fan faces away from the optical engine.

4. The projection device of claim 2, wherein a distance between the air outlet and the air inlet is greater than or equal to a first reference distance.

5. The projection apparatus according to claim 2, wherein the first accommodating portion further has a first guide portion and a second guide member;

6. The projection device of claim 5, wherein the first guide member and the second guide member are each louvers.

7. The projection device of any of claims 1-6, wherein the first receptacle further comprises a support frame;

8. The projection device of claim 2, wherein the functional components include a power board, a control board, and a display board;

9. The projection apparatus of claim 8, wherein a plane of the control motherboard is perpendicular to a flow direction of the air flow in the first receptacle, and the air inlet is located between the control motherboard and the optical engine.

10. The projection device of claim 8 or 9, wherein the plane of the power strip is perpendicular to a direction of gas flow in the first receptacle.

11. The projection device of claim 10, wherein the air intake is located between the power strip and the optical engine.

12. The projection device of claim 10, wherein the air outlet is located between the power strip and the optical engine.