CN220367516U

CN220367516U - Projection equipment

Info

Publication number: CN220367516U
Application number: CN202321641627.6U
Authority: CN
Inventors: 杨昱; 王宇杰; 王光泉; 张伟; 李熙; 董大林; 谭祺瑞
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd; Beijing BOE Technology Development Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd; Beijing BOE Technology Development Co Ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2024-01-19
Anticipated expiration: 2033-06-26

Abstract

Embodiments of the present disclosure provide a projection apparatus. The projection equipment comprises a light source module, an imaging module and a heat dissipation module, wherein a first accommodating cavity of a first shell of the light source module is communicated with a second accommodating cavity of a shell assembly of the imaging module, a light source is arranged in the first accommodating cavity, an image display element and a first fan are arranged in the second accommodating cavity, a first preset channel and a second preset channel are arranged on two sides of the image display element, the second accommodating cavity is formed with a first air flow circulation channel and a second air flow circulation channel, the first air flow circulation channel comprises an air inlet from an air outlet of the first fan to the first preset channel to the first fan, the second air flow circulation channel comprises an air inlet from an air outlet of the first fan to the second preset channel to the first fan, and the heat dissipation module is used for absorbing heat of the first air flow circulation channel and/or the second air flow circulation channel and transmitting the heat to the outside of the shell assembly for heat dissipation. According to the technical scheme, the heat dissipation capacity and the heat dissipation efficiency of the projection equipment can be improved.

Description

Projection equipment

Technical Field

The disclosure relates to the technical field of projection devices, and in particular relates to a projection device.

Background

Projection devices, which may project images or video onto a curtain, typically include a light source and an image display element. The light source and the image display element convert a part of the light energy into heat energy, and the projection apparatus may collect a large amount of heat inside when used for a long time. In the related art, the projection device has a problem that the heat dissipation efficiency is low, so that the brightness of the projection device cannot be improved.

Disclosure of Invention

Embodiments of the present disclosure provide a projection device to solve or alleviate one or more technical problems in the prior art.

As a first aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a projection apparatus, including:

the light source module comprises a first shell, a first accommodating cavity is formed in the first shell, and a light source is arranged in the first accommodating cavity;

the imaging module comprises a shell component, a second accommodating cavity communicated with the first accommodating cavity is formed in the shell component, an image display element is arranged in the second accommodating cavity, a first preset channel is arranged on one side, far away from the light source, of the image display element, a second preset channel is arranged on one side, close to the light source, of the image display element, a first fan is also arranged in the second accommodating cavity, the second accommodating cavity is provided with a first air flow circulation channel and a second air flow circulation channel, and the first air flow circulation channel comprises an air inlet from an air outlet of the first fan to the first preset channel, a first preset channel and an air inlet from an air outlet of the first preset channel to the first fan; the second airflow circulation channel comprises an air inlet from an air outlet of the first fan to a second preset channel, a second preset channel and an air inlet from an air outlet of the second preset channel to the first fan;

The heat dissipation module comprises a first part and a second part, wherein the first part is in contact with the inner side of the second accommodating cavity, the second part is positioned outside the second accommodating cavity, the first part is positioned on the first airflow circulation channel and/or the second airflow circulation channel, and the first part is used for absorbing heat of the first airflow circulation channel and/or the second airflow circulation channel and transmitting the heat to the second part for heat dissipation.

In some possible embodiments, a first fresnel lens and a second fresnel lens are respectively arranged at two sides of the image display element, a first preset channel is formed between the first fresnel lens and the image display element, and a second preset channel is formed between the second fresnel lens and the image display element;

the shell assembly comprises a main shell and a cover body, the cover body is arranged on the top wall of the main shell in a covering manner, a first sub-accommodating cavity is formed in the main shell, the image display element is positioned in the first sub-accommodating cavity, a first channel is arranged in the top wall, and the first air flow circulating channel further comprises an air inlet from an air outlet of a first preset channel to a first fan through the first channel;

a second sub-accommodating cavity is formed between the cover body and the top wall, the top wall is provided with a first ventilation opening and a second ventilation opening, and the second airflow circulating channel further comprises an air inlet from an air outlet of the second preset channel to the second sub-accommodating cavity through the second ventilation opening and from the second sub-accommodating cavity to the first fan through the first ventilation opening.

In some possible embodiments, a heat insulating transparent body is disposed between the second fresnel lens and the image display element, and the second preset channel includes a first sub-preset channel between the image display element and the heat insulating transparent body and a second sub-preset channel between the heat insulating transparent body and the second fresnel lens;

the first ventilation opening comprises a first sub ventilation opening and a second sub ventilation opening, the projection equipment comprises two first fans, the first sub ventilation opening is opposite to an air inlet of the first fan, the second air flow circulation channel further comprises an air inlet from an air outlet of the first sub preset channel to the second sub containing cavity through the second ventilation opening, and the second sub containing cavity is connected to the air inlet of the first fan through the first sub ventilation opening;

the second sub-ventilation opening is opposite to the air inlet of the second first fan, and the second air flow circulation channel further comprises an air inlet from the air outlet of the second sub-preset channel to the second sub-containing cavity through the second ventilation opening and from the second sub-containing cavity to the second first fan through the second sub-ventilation opening.

In some possible embodiments, the ventilation system further comprises a first adjusting device and/or a second adjusting device, wherein the first adjusting device is used for adjusting the ventilation quantity of the first sub ventilation opening, and the second adjusting device is used for adjusting the ventilation quantity of the second sub ventilation opening.

In some possible embodiments, the heat dissipation module includes a first heat dissipation module including a first sub-portion and a second sub-portion, the first sub-portion being located in the second accommodating cavity, the first sub-portion being located between an air outlet of the first fan and an air inlet of the first preset channel, the first sub-portion also being located between the air outlet of the first fan and the air inlet of the second preset channel, the second sub-portion being located outside the second accommodating cavity.

In some possible embodiments, the housing assembly includes a main housing and a cover body, the cover body is covered on a top wall of the main housing, a first sub-accommodating cavity is formed in the main housing, a second sub-accommodating cavity is formed between the cover body and the top wall, a second ventilation opening is formed in the top wall, an air outlet of the second preset channel is communicated with the second sub-accommodating cavity through the second ventilation opening, a heat dissipation part is arranged on an outer side surface of the cover body, the heat dissipation part includes a plurality of heat dissipation fins arranged on an outer surface of the cover body at intervals, the heat dissipation part is close to the second ventilation opening, and the heat dissipation module includes the cover body and the heat dissipation part.

In some possible embodiments, a side of the first housing facing the cover is provided with second heat dissipation fins close to the heat dissipation portion.

In some possible embodiments, the housing assembly includes a main housing and a cover body, the cover body is arranged on the top wall of the main housing, a first sub-accommodating cavity is formed in the main housing, a second sub-accommodating cavity is formed between the cover body and the top wall, and the second accommodating cavity comprises the first sub-accommodating cavity and the second sub-accommodating cavity;

The first sub-accommodation chamber includes a fan installation chamber for accommodating a first fan and a gas flow chamber located outside the fan installation chamber, the main housing includes a first side wall for forming the gas flow chamber, the first side wall includes a first inclined portion and a first protruding portion protruding outward from the first inclined portion, the first side wall further includes a second inclined portion and a second protruding portion protruding outward from the second inclined portion, the first protruding portion and the second protruding portion are disposed oppositely, a first air flow channel is formed between the first protruding portion and the second protruding portion, a first heat dissipation fin for dissipating heat of gas flowing through the first air flow channel is disposed between the first protruding portion and the second protruding portion, and the heat dissipation module includes the first heat dissipation fin.

In some possible embodiments, the projection device includes two first fans, the top wall is provided with a first ventilation opening, the first ventilation opening includes a first sub ventilation opening and a second sub ventilation opening, air inlets of the first sub ventilation opening and the first fan are respectively located at two opposite ends of the first airflow channel, and the second sub ventilation opening is opposite to the air inlet of the second first fan.

In some possible embodiments, the projection device further includes a third heat dissipation fin and a fourth heat dissipation fin, the third heat dissipation fin and the fourth heat dissipation fin are respectively located at two opposite sides of the light source module, a heat conductor is installed on one end surface of the light source module far away from the imaging module, and the third heat dissipation fin and the fourth heat dissipation fin are respectively connected with the heat conductor.

In some possible embodiments, the projection device further includes a lens module connected to the imaging module, the housing assembly includes a main housing and a cover, the cover is disposed on a top wall of the main housing, the main housing includes a first sidewall, and the first sidewall is provided with a first heat dissipation fin in a protruding manner;

the lens module is positioned on one side wall of the main shell far away from the first radiating fins, and the third radiating fins and the lens module are positioned on the same side of the light source module;

the projection equipment further comprises a second fan, an air outlet of the second fan faces the third radiating fins, an air inlet of the second fan faces the imaging module, and part of heat emitted by the first radiating fins flows along two sides of the first radiating fins and the outer surface of the cover body faces the air inlet of the second fan.

In some possible embodiments, a portion of the heat dissipated by the first heat fins flows along the first sidewall, the lateral surface of the main housing, and a portion of the surface of the first housing toward the air intake of the second fan.

In some possible embodiments, the heat dissipation module includes a first heat dissipation module including a first sub-portion and a second sub-portion, the first sub-portion being located in the second receiving cavity, the second sub-portion being located outside the second receiving cavity, the second sub-portion being located on the same side of the imaging module as the second fan, the heat dissipated by the second sub-portion flowing toward an air inlet of the second fan.

the lens module is positioned on one side wall of the main shell far away from the first radiating fins, and the fourth radiating fins and the first radiating fins are positioned on the same side of the light source module;

the projection device further comprises a third fan, an air inlet of the third fan faces the first radiating fins, an air outlet of the third fan faces the fourth radiating fins, and part of heat emitted by the first radiating fins flows along the first side wall and the outer surface of the shell assembly towards the air inlet of the third fan.

In some possible embodiments, the first housing has a tapered shape that gradually increases from the light source toward the imaging module.

The technical scheme of the embodiment of the disclosure can obtain the following beneficial effects: the heat radiation capability and heat radiation efficiency of the projection device can be improved.

The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present disclosure will become apparent by reference to the drawings and the following detailed description.

Drawings

In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not to be considered limiting of its scope.

FIG. 1 is a schematic diagram of a projection apparatus according to an embodiment of the disclosure;

FIG. 2 is a schematic view of another angle structure of a projection apparatus according to an embodiment of the disclosure;

FIG. 3 is a schematic plan view of a projection device according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a projection apparatus according to an embodiment of the disclosure;

FIG. 5 is another schematic cross-sectional view of a projection device according to an embodiment of the disclosure;

FIG. 6 is a schematic diagram of an imaging module configuration according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a first heat dissipation module according to an embodiment of the disclosure;

FIG. 8 is a schematic diagram of a projection device according to an embodiment of the present disclosure;

FIG. 9 is a schematic view of a portion of the structure of a housing assembly according to an embodiment of the present disclosure;

FIG. 10 is a schematic illustration of a housing assembly of an embodiment of the present disclosure;

fig. 11 is a schematic view of a first heat sink fin according to an embodiment of the disclosure;

FIG. 12 is a schematic plan view of a projection device with a cover removed in accordance with an embodiment of the present disclosure;

FIG. 13 is a top view of a projection device of an embodiment of the present disclosure;

fig. 14 is a schematic structural view of a third heat sink fin and a fourth heat sink fin according to an embodiment of the present disclosure;

FIG. 15 is a schematic view of an imaging module configuration according to an embodiment of the present disclosure;

fig. 16 is a schematic structural view of an imaging module according to an embodiment of the present disclosure.

Reference numerals illustrate:

10. a light source module; 20. an imaging module; 30. a heat dissipation module; 40. a first fan; 50. a lens module; 60. a second fan; 70. a third fan;

11. a first housing; 12. a light source; 111. a first accommodation chamber;

21. a housing assembly; 22. an image display element; 23. a first fresnel lens; 24. a second fresnel lens; 25. a heat-insulating transparent body;

211. a second accommodation chamber; 212. a first preset channel; 213. a second preset channel; 214. a main housing, 215, a cover; 216. a top wall; 217. a first channel; 218. a heat dissipation part;

2141. a first inclined portion; 2142. a first projection; 2143. a second inclined portion; 2144. a second projection; 2145. a first airflow passage;

30a, a first portion; 30b, a second part;

31. a first heat dissipation module; 311. a first sub-portion; 312. a second sub-portion; 32. a first heat sink fin; 33. a third heat sink fin; 34. fourth radiating fins, 35, and a heat conductor; 36. and the second heat radiating fins.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

Fig. 1 is a schematic structural view of a projection apparatus according to an embodiment of the present disclosure, fig. 2 is another schematic angular structural view of a projection apparatus according to an embodiment of the present disclosure, and fig. 3 is a schematic plan view of a projection apparatus according to an embodiment of the present disclosure. Embodiments of the present disclosure provide a projection apparatus. As shown in fig. 1 to 3, the projection apparatus may include a light source module 10, an imaging module 20, and a heat dissipation module 30.

Fig. 4 is a schematic cross-sectional view of a projection apparatus according to an embodiment of the disclosure, fig. 5 is another schematic cross-sectional view of a projection apparatus according to an embodiment of the disclosure, fig. 4 may be A-A cross-sectional view of fig. 3, and fig. 5 may be B-B cross-sectional view of fig. 3. In one embodiment, as shown in fig. 4 and 5, the light source module 10 includes a first housing 11, the first housing 11 being formed with a first receiving cavity 111, and a light source 12 being disposed in the first receiving cavity 111.

As shown in fig. 4 and 5, the imaging module 20 includes a housing assembly 21 and an image display element 22. One end of the housing assembly 21 may be combined with the first housing 11. The housing assembly 21 is formed with a second accommodation chamber 211, the second accommodation chamber 211 is provided in communication with the first accommodation chamber 111, and the image display element 22 is provided in the second accommodation chamber 211.

As shown in fig. 4 and 5, a side of the image display element 22 away from the light source 12 is provided with a first preset channel 212, and a side of the image display element 22 close to the light source 12 is provided with a second preset channel 213.

As shown in fig. 4 and 5, the projection apparatus further includes a first fan 40, the first fan 40 being disposed in the second accommodating chamber 211, and a first air circulation path D1 and a second air circulation path D2 may be formed in the second accommodating chamber 211. The first airflow circulation channel D1 includes an air inlet from an air outlet of the first fan 40 to the first preset channel 212, and an air inlet from an air outlet of the first preset channel 212 to the first fan 40. The second air flow circulation channel D2 includes an air inlet from an air outlet of the first fan 40 to the second preset channel 213, and an air inlet from an air outlet of the second preset channel 213 to the first fan 40.

That is, the heat dissipation air flow formed by the first fan 40 is blown out from the air outlet of the first fan 40, enters the first preset channel 212 through the air inlet of the first preset channel 212, is blown out through the air outlet of the first preset channel 212, and is finally sucked through the air inlet of the first fan 40, so that the heat dissipation air flow circularly flows along the first air flow circulation channel D1 to dissipate heat at one side of the image display element 22. The heat dissipation air flow formed by the first fan 40 is blown out from the air outlet of the first fan 40, enters the second preset channel 213 through the air inlet of the second preset channel 213, is blown out from the air outlet of the second preset channel 213, and is finally sucked through the air inlet of the first fan 40, so that the heat dissipation air flow circularly flows along the second air flow circulation channel D2 to dissipate heat at the other side of the image display element 22. Exemplary, the arrow directions in fig. 4 and 5 represent schematic diagrams of the flow directions of the heat dissipation airflows in the first preset channel and the second preset channel.

In the projection device of the embodiment of the disclosure, the heat dissipation airflow generated by the first fan 40 enters the first preset channel 212 from the air inlet of the first preset channel 212, enters the second preset channel 213 from the air inlet of the second preset channel 213, flows in the first preset channel 212 and the second preset channel 213, and can take away the heat generated at two sides of the image display element in the projection device during the discharge process from the air outlet of the first preset channel 212 and the air outlet of the second preset channel 213, thereby realizing the heat dissipation of the image display element.

As shown in fig. 2, 4 and 5, the heat dissipation module 30 includes a first portion 30a contacting the inside of the second accommodation chamber 211 and a second portion 30b located outside the second accommodation chamber 211. The first portion 30a may be located on the first airflow circulation channel D1, and the first portion 30a may be configured to absorb heat of the first airflow circulation channel D1 and transfer the heat to the second portion 30b for heat dissipation. The first portion 30a may also be located on the second airflow circulation channel D2, and the first portion 30a may also be configured to absorb heat from the second circulation channel D2 and transfer the heat to the second portion 30b for heat dissipation. By providing the first portion 30a contacting the inner side of the second accommodating cavity 211 and the second portion 30b located outside the second accommodating cavity 211, heat in the second accommodating cavity 211 can be exchanged with the outside in time, so that heat dissipation efficiency is improved and heat dissipation capacity is improved.

In the projection apparatus of the embodiment of the present disclosure, the heat dissipation airflow formed by the first fan 40 may circulate along the first airflow circulation channel D1 and the second airflow circulation channel D2, and the first preset channel 212 of the first airflow circulation channel D1 and the second preset channel 213 of the second airflow circulation channel D2 are respectively located at two sides of the image display element 22, so that the heat dissipation airflow may absorb heat at two sides of the image display element 22 through the first preset channel 212 and the second preset channel 213, and absorb heat of the first airflow circulation channel D1 and the second airflow circulation channel D2 through the first portion 30a, and then transfer the heat to the second portion 30b through the first portion 30a, thereby implementing internal and external heat exchange of the second accommodating cavity 211, and further implementing external heat dissipation. Therefore, the projection device of the embodiment of the disclosure can respectively perform internal circulation heat dissipation on two sides of the image display element 22, so that the problems of poor heat dissipation capability and single heat dissipation channel caused by space limitation of the projection device of the related art are solved, the heat dissipation capability and heat dissipation efficiency of the projection device are improved, the projection effect of the projection device is improved, and the reliability of the projection device is ensured. Moreover, the problem of heat accumulation in the shell assembly is improved, so that the power of the light source is further improved, and the brightness and the definition of the projection equipment are further improved.

It should be noted that, the first portion 30a contacts the inner side of the second accommodating cavity 211, it is understood that the first portion 30a may be located in the second accommodating cavity 211, so that the first portion 30a may absorb heat in the second accommodating cavity 211; alternatively, the first portion 30a may be one or more inner surfaces of the heat dissipating module in contact with the second receiving cavity 211, and the heat dissipating module absorbs heat of the second receiving cavity 211 through the first portion 30a and transfers the heat to the second portion 30b.

The second portion 30b is located outside the second receiving cavity 211, it is understood that the second portion 30b may be located outside the second receiving cavity 211, or the second portion 30b may be one or more outer surfaces of the heat dissipating module located outside the second receiving cavity 211, so that the second portion 30b may dissipate heat outwardly.

Illustratively, the light source 12 is configured to generate light, and the light source 12 may be a Light Emitting Diode (LED). The LED has the advantages of small volume, long service life, energy conservation and environmental protection, and can reduce the volume and weight of the whole projector when being applied to projection equipment. For example, the light emitting diode may be a high-power light emitting diode as required, so that the projection device may meet the requirements of high definition and high brightness, and the heat dissipation capability of the projection device adopting the embodiments of the present disclosure may meet the requirements.

Illustratively, the image display element 22 may be a liquid crystal display panel (LiquidCrystalDisplay, LCD), and the image display element 22 is located on the light emitting side of the light source 12 and receives the outgoing light generated by the light source 12.

The first fan 40 may be, for example, a centrifugal fan that sucks air through the suction port and discharges the air from the air outlet at an angle of 90 ° to the suction port. The first fan 40 can dissipate heat by using forced heat convection, and the first fan 40 takes away heat by using a flow guiding function to exchange heat with ambient air. The first fan 40 may generate a heat dissipation air flow of forced convection, and the heat dissipation air flow may circulate in the second accommodating chamber 211 through the first air flow circulation channel D1 and the second air flow circulation channel D2, thereby taking away heat of the image display element.

As shown in fig. 4 and 5, in one embodiment, the imaging module 20 may further include a first fresnel lens 23 and a second fresnel lens 24, the first fresnel lens 23 and the second fresnel lens 24 being disposed on both sides of the image display element 22, the first fresnel lens 23 being disposed away from the light source 12 with respect to the second fresnel lens 24. A first predetermined channel 212 is formed between the first fresnel lens 23 and the image display element 22, and a second predetermined channel 213 is formed between the second fresnel lens 24 and the image display element 22.

As shown in fig. 4 and 5, the housing assembly 21 may illustratively include a main housing 214 and a cover 215, the cover 215 being disposed over a top wall 216 of the main housing 214. The main housing 214 has a first sub-accommodation chamber 211a formed therein, and the image display element 22 is located in the first sub-accommodation chamber 211 a. The top wall 216 is provided with a first channel 217 therein, and the first air flow circulation channel D1 further includes an air inlet from an air outlet of the first preset channel 212 to the first fan 40 through the first channel 217. That is, the heat dissipation airflow enters the first channel 217 of the top wall 216 through the air outlet of the first preset channel 212, and then enters the air inlet of the first fan 40.

Fig. 6 is a schematic structural diagram of an imaging module according to an embodiment of the disclosure, as shown in fig. 4, 5 and 6, a second sub-accommodating cavity 211b is formed between the cover 212 and the top wall 216, the top wall 216 is provided with a first ventilation opening K1 and a second ventilation opening K2, and the second air circulation channel D2 further includes an air inlet from the air outlet of the second preset channel 213 to the second sub-accommodating cavity 211b through the second ventilation opening K2 and from the second sub-accommodating cavity 211b to the first fan 40 through the first ventilation opening K1.

As shown in fig. 4 and 5, the second accommodating chamber 211 includes a first sub-accommodating chamber 211a and a second sub-accommodating chamber 211b, and a top wall 216 of the main housing 214 is disposed between the first sub-accommodating chamber 211a and the second sub-accommodating chamber 211b, and the material of the top wall 216 may include plastic.

The air flow blown out from the air outlet of the first fan 40 enters the first preset channel 212 through the air inlet of the first preset channel 212, flows through the first preset channel 212, then enters the first channel 217 through the air outlet of the first preset channel 212, flows through the first channel 217, is sucked by the air inlet of the first fan 40 for the next circulation, and in the process of one circulation, the heat dissipation air flow circularly flows along the first air flow circulation channel D1, and when passing through the first preset channel 212 between the image display element 22 and the first Fresnel lens 23, heat between the image display element 22 and the first Fresnel lens 23 is taken away, so that internal circulation heat dissipation is realized.

The air flow blown out from the air outlet of the first fan 40 enters the second preset channel 213 through the air inlet of the second preset channel 213, flows through the second preset channel 213, sequentially flows through the air outlet of the second preset channel 213 and the second air inlet K2 to the second sub-accommodating cavity 211b, flows through the second sub-accommodating cavity 211b, is sucked into the air inlet of the first fan 40 through the first air inlet K1 to perform the next circulation, and in the one circulation process, the heat dissipation air flow circularly flows along the second air flow circulation channel D2, and when passing through the first preset channel 212 between the image display element 22 and the second fresnel lens 24, heat between the image display element 22 and the second fresnel lens 24 is taken away, so that the internal circulation heat dissipation is realized.

According to the projection device disclosed by the embodiment of the disclosure, the heat of two sides of the image display element 22 can be taken away by the heat dissipation air flow generated by the first fan 40 through the first air flow circulation channel D1 and the second air flow circulation channel D2, so that the heat dissipation efficiency is improved, the heat dissipation effect is improved, the problem of heat accumulation in the projection device is solved, the heat dissipation channel is increased, and the improvement of the power of a light source is facilitated.

As shown in fig. 4 and 5, in one embodiment, the imaging module 20 may further include a heat insulating transparent body 25, the heat insulating transparent body 25 being disposed between the second fresnel lens 24 and the image display element 22, the heat insulating transparent body 25 being disposed opposite to the second fresnel lens 24 and the image display element 22 with a gap formed therebetween. The second preset channel 213 includes a first sub-preset channel 213a between the image display element 22 and the insulating transparent body 25 and a second sub-preset channel 213b between the insulating transparent body 25 and the second fresnel lens 24.

Referring to fig. 2 and 6, the first vent K1 includes a first sub-vent K11 and a second sub-vent K12. The projection device includes two first fans 40, the first sub-ventilation opening K11 is opposite to the air inlet of the first fan 40, and the second air flow circulation path D2 further includes an air inlet from the air outlet of the first sub-preset path 213a to the second sub-receiving chamber 211b through the second ventilation opening K2 and from the second sub-receiving chamber 211b to the first fan 40 through the first sub-ventilation opening K11.

Referring to fig. 2 and 6, the second sub-ventilation opening K12 is opposite to the air inlet of the second first fan 40, and the second air circulation path D2 further includes an air inlet from the air outlet of the second sub-preset path 213b to the second sub-receiving chamber 211b through the second ventilation opening K2 and from the second sub-receiving chamber 211b to the second first fan 40 through the second sub-ventilation opening K12.

Illustratively, the first sub-vent K11 may include one or more vents and the second sub-vent K12 may include one or more vents; or the first and second sub-vents K11 and K12 may each be mesh-shaped. The ventilation flow rates of the first and second sub-vents K11 and K12, i.e., the total area of the vents, may be equal or unequal. The specific structure and size of the first and second sub-vents K11 and K12 may be set according to actual use requirements, which are not limited herein.

Illustratively, the heat dissipating air flows from the air outlet of the first sub-preset passage 213a to the second sub-receiving chamber 211b through the second air inlet K2, and from the second sub-receiving chamber 211b to the air inlet of the first fan 40 through the first sub-air outlet K11. The heat dissipation air flow passes through the second ventilation opening K2 from the air outlet of the second sub-preset passage 213b to the second sub-accommodating chamber 211b, and passes through the second sub-ventilation opening K12 from the second sub-accommodating chamber 211b to the air inlet of the second first fan 40.

The second preset channel 213 may be divided into a first sub-preset channel 213a and a second sub-preset channel 213b by disposing the heat insulating transparent body 25 between the second fresnel lens 24 and the image display element 22. The heat-insulating transparent body 25 has a heat-insulating transparent effect, so that the heat-insulating transparent body 25 can insulate most of heat generated by the light source from the second sub-preset channel 213, reduce the heat entering the first sub-preset channel 213a, and further reduce the heat received by the image display element.

In addition, by providing the heat insulating transparent body 25, and providing the first vent K1 to include the first sub-vent K11 and the second sub-vent K12, the second air flow circulation passage is divided into two sub-circulation passages, the path of the first sub-circulation passage including: first fan outlet→first sub preset channel 213a inlet→first sub preset channel 213a→first sub preset channel 213a outlet→second vent k2→second sub accommodating cavity 211b→first sub vent k11→first first fan 40 inlet; the path of the second sub-circulation path includes: second first fan outlet→second sub preset channel 213b air inlet→second sub preset channel 213b→second sub preset channel 213b air outlet→second air vent k2→second sub accommodation cavity 211b→second sub vent k12→second first fan 40 air inlet. Such two sub-circulation channels, the majority heat that the light source produced can dispel the heat through the second sub-circulation channel, has further reduced the heat that conducts to image display component, has improved the inside radiating effect of projection equipment, is favorable to promoting projection luminance through promoting light source power.

It should be noted that, in the case where the projection apparatus includes two first fans 40, the first fans in the first airflow circulation path D1 may be any one of the two first fans 40.

In one embodiment, the projection device further comprises a first adjusting device for adjusting the ventilation of the first sub-ventilation opening K11 and/or a second adjusting device for adjusting the ventilation of the second sub-ventilation opening K12. Illustratively, the first and second sub-vents K11 and K12 may be mesh-shaped holes. The projection apparatus may include a first adjusting device that may adjust the mesh number of the first sub-vent K11 and a second adjusting device that may adjust the number of the second sub-vents K12 to thereby achieve the ventilation amounts of the first and second sub-vents K11 and K12.

The projection device may adjust the ventilation amount of the first sub-ventilation opening K11, or the projection device may also adjust the ventilation amount of the second sub-ventilation opening K12, or may also adjust both the ventilation amount of the first sub-ventilation opening K11 and the ventilation amount of the second sub-ventilation opening K12, that is, may adjust the circulation speed of the heat dissipation air flow of the first sub-circulation channel and the second sub-circulation channel, and further adjust the air flow speed of the first sub-preset channel 213a, and adjust the temperature on the right side of the image display element 22, so that the air temperature on both sides of the image display element 22 is balanced, thereby improving the display effect.

It should be noted that, the circulation speeds of the heat dissipation air flows of the first sub-circulation channel and the second sub-circulation channel may be set according to actual requirements, which is not limited herein.

The structures of the first adjusting device and the second adjusting device can be set according to the needs, so long as the ventilation quantity of the first sub ventilation opening and the second sub ventilation opening can be adjusted.

Fig. 7 is a schematic structural diagram of a first heat dissipation module according to an embodiment of the disclosure, as shown in fig. 2 and fig. 7, in one implementation, the heat dissipation module 30 includes a first heat dissipation module 31. The first heat dissipation module 31 includes a first sub-portion 311 and a second sub-portion 312, the first sub-portion 311 is located in the second accommodating cavity 211, the first sub-portion 311 is located between an air outlet of the first fan 40 and an air inlet of the first preset channel 212, the first sub-portion 311 is also located between an air outlet of the first fan 40 and an air inlet of the second preset channel 213, and the second sub-portion 312 is located outside the second accommodating cavity 211.

The first portion 30a of the heat dissipating module 30 includes a first sub-portion 311 and the second portion 30b includes a second sub-portion 312. Illustratively, the first sub-portion 311 and the second sub-portion 312 are heat dissipation fins, the first sub-portion 311 and the second sub-portion 312 are connected by a heat conduction pipe 313, and the first sub-portion 311 extends along a long side direction of an air outlet of the first fan 40. The first sub-portion 311 is located between the air outlet of the first fan 40 and the air inlet of the first preset channel 212, and the first sub-portion 311 is also located between the air outlet of the first fan 40 and the air inlet of the second preset channel 213, that is, the heat dissipation air flow at the air outlet of the first fan 40 will reenter the first preset channel 212 and the second preset channel 213 through the first sub-portion 311. The first subsection 311 may absorb heat and transfer it to the second subsection 312 via a heat pipe and conduct it out of the projection device via the second subsection 312. The structure can further improve the heat dissipation efficiency of the projection equipment and further improve the heat dissipation effect of the projection equipment.

As shown in fig. 2 and 7, the first sub-portion 311 and the second sub-portion 312 are exemplarily connected by copper pipes, the first sub-portion 311 is disposed parallel to the first fan 40, and the first sub-portion 311 and the second sub-portion 312 of the first heat dissipation module 31 are integrally disposed in a T shape.

Fig. 8 is a schematic structural diagram of a projection apparatus according to an embodiment of the disclosure, as shown in fig. 4, 5 and 8, in one implementation, a housing assembly 21 includes a main housing 214 and a cover 215, where the cover 215 is disposed on a top wall 216 of the main housing 214, a first sub-accommodating cavity 211a is formed in the main housing 214, and a second sub-accommodating cavity 211b is formed between the cover 215 and the top wall 216. The top wall 216 is provided with a second air vent K2, and the air outlet of the second preset channel 213 is communicated with the second sub accommodating cavity 211b through the second air vent K2. The outer surface of the cover 215 is provided with a heat dissipation portion 218, the heat dissipation portion 218 includes a plurality of heat dissipation fins arranged on the outer surface of the cover 215 at intervals, the heat dissipation portion 218 is close to the second ventilation hole K2, and the heat dissipation module 30 includes the cover 215 and the heat dissipation portion 218.

Illustratively, the material of the cover 215 includes a metal material, for example, the cover 215 may include a cast aluminum material, and heat of the heat dissipation air flow in the second sub-receiving chamber 211b is absorbed through an inner surface of the cover 215 of the metal material, thereby implementing heat conduction of the second receiving chamber to the outside of the second receiving chamber. The heat dissipation air flow which absorbs the heat of the image display element 22 enters the second sub-accommodating cavity 211b from the air outlet of the second preset channel 213 through the second air outlet K2 and contacts the cover 215 for heat exchange, the heat of the heat dissipation air flow is absorbed by the cover 215 and conducted to the outside of the second accommodating cavity 211, and enters the outer air flow channel for heat dissipation through the cover 215 and the heat dissipation part 218, so that the heat dissipation channel is further increased, and the heat dissipation efficiency is further improved.

Referring to fig. 8, the heat dissipation portion 218 includes a plurality of heat dissipation fins, and the heat dissipation fins are disposed on the outer surface of the cover 215 at intervals, so that the heat dissipation area of the heat dissipation portion 218 can be increased, and the heat dissipation portion 218 is close to the second air vent K2, so that the heat of the air flow at the second air vent K2 can be dissipated through the heat dissipation fins in time, and the heat dissipation efficiency and the heat dissipation effect are further improved.

Referring to fig. 4, 5 and 8, in one embodiment, a side of the first housing 11 facing the cover 215 is provided with second heat dissipation fins 36 near the heat dissipation portion 218. Illustratively, the second heat sink fins 36 are removably mounted to the first housing 11. The side of the first housing 11 facing the cover 215 is provided with a mounting hole near the heat sink 218, through which the second heat sink fin 36 is mounted. A part of the surface of the second heat dissipation fin 36 is located in the first accommodating cavity 111 of the first housing 11, and the second heat dissipation fin 36 can absorb heat of the first accommodating cavity 111 and conduct out of the first accommodating cavity 111. Furthermore, the heat from the heat dissipating part 218 can flow to the external circulation heat dissipating module located at both sides through the second heat dissipating fins 36.

As shown in fig. 4 and 5, in one embodiment, the housing assembly 21 includes a main housing 214 and a cover 215, the cover 215 is disposed on a top wall 216 of the main housing 214, a first sub-receiving chamber 211a is formed in the main housing 214, a second sub-receiving chamber 211b is formed between the cover 215 and the top wall 216, and the second receiving chamber 211 includes the first sub-receiving chamber 211a and the second sub-receiving chamber 211b.

Fig. 9 is a schematic view of a part of a structure of a housing assembly according to an embodiment of the present disclosure, and fig. 10 is a schematic view of a structure of a housing assembly according to an embodiment of the present disclosure, and as shown in fig. 8, 9 and 10, the first sub-receiving chamber 211a includes a fan mounting chamber 2100 for receiving the first fan 40 and a gas flow chamber located outside the fan mounting chamber 2100. In fig. 11, a fan mounting chamber 2100 is formed at the bottom of the main housing 214, and a gas flow chamber is formed at the upper side of the fan mounting chamber 2100. The main housing 214 includes a first sidewall 214a for forming a gas flow chamber, and the first sidewall 214a includes a first inclined portion 2141 and a first protruding portion 2142 protruding outward from the first inclined portion 2141. The first sidewall 214a further includes a second inclined portion 2143 and a second protruding portion 2144 protruding outwardly from the second inclined portion 2143. The first protruding portion 2142 and the second protruding portion 2144 are disposed opposite to each other, a first air flow channel 2145 is formed between the first protruding portion 2142 and the second protruding portion 2144, a first heat dissipation fin 32 for dissipating heat of air flowing through the first air flow channel 2145 is disposed between the first protruding portion 2142 and the second protruding portion 2144, and the heat dissipation module 30 includes the first heat dissipation fin 32.

As shown in fig. 8 and 9, a first air channel corner is formed between the first protruding portion 2142 and the first inclined portion 2141, a second air channel corner is formed between the second protruding portion 2144 and the second inclined portion 2143, and the hot air flowing out of the first heat dissipation fins 32 of the housing assembly 21 flows into the first air channel corner and the second air channel corner and then flows up to the cover 215 of the housing assembly 21 along the first inclined portion 2141 of the first side wall 214a and the second inclined portion 2143 of the first side wall 214a, so that the hot air guided out of the housing assembly 21 flows directly from the first air channel corner and the second air channel corner to the cover 215 without passing through the side wall of the housing assembly 21, thereby shortening the heat transfer path and further improving the heat dissipation efficiency.

Illustratively, as shown in fig. 9, the gas flow chamber includes an inner cavity 210 defined by respective sidewalls of the main housing 214 and a first gas flow channel 2145. The first air flow channel 2145 may be isolated or in communication with the inner cavity 210, and in the fig. 9 embodiment, the first air flow channel 2145 may be isolated from the inner cavity 210. In the case where the first air flow channel 2145 may be isolated from the inner cavity 210 and the projection device includes two first fans 40, the first fan in the first air flow circulation channel D1 may be the first fan opposite to the first sub-vent K1, as shown in fig. 6.

Fig. 11 is a schematic structural diagram of a first radiator fin according to an embodiment of the disclosure, as shown in fig. 8, 9 and 11, and exemplarily, a first radiator fin 32 is partially located between the first protrusion 2142 and the second protrusion 2144, and the first radiator fin 32 partially protrudes beyond the first protrusion 2142 and the second protrusion 2144. The portion between the first and second protrusions 2142 and 2144 may absorb heat of the air flow passing through the first air flow channel 2145 and transfer the heat to the portion outside the first and second protrusions 2142 and 2144 to the outside of the second accommodation chamber 211.

In the projection device of the embodiment of the disclosure, the first heat dissipation fins 32 can perform heat exchange on the heat dissipation airflow flowing through the first airflow channel 2145, so that the heat dissipation efficiency is further improved, and the heat dissipation effect is improved. Further, by providing the first side wall 214a with a structure having the first air channel corner and the second air channel corner, the conduction path of heat is shortened, further improving the heat radiation efficiency.

Fig. 12 is a schematic plan view of a projection apparatus with a cover removed according to an embodiment of the disclosure, as shown in fig. 12, the projection apparatus includes two first fans 40, a top wall 216 is provided with a first ventilation opening K1, the first ventilation opening K1 includes a first sub ventilation opening K11 and a second sub ventilation opening K12, air inlets of the first sub ventilation opening K11 and the first fans 40 are respectively located at opposite ends of the first air flow channel 2145, and the second sub ventilation opening K12 is opposite to the air inlet of the second first fans 40.

In the projection apparatus of the embodiment of the disclosure, the heat dissipation airflow entering from the first sub-ventilation opening K11 may pass through the first airflow channel 2145, and the first heat dissipation fins 32 may dissipate heat of the heat dissipation airflow flowing through the first airflow channel 2145, so that the heat dissipation efficiency may be further improved, and the heat dissipation effect may be improved.

Fig. 13 is a top view of a projection apparatus according to an embodiment of the disclosure, fig. 14 is a schematic structural diagram of a third heat dissipation fin and a fourth heat dissipation fin according to an embodiment of the disclosure, and as shown in fig. 13 and 14, in one implementation, the projection apparatus further includes a third heat dissipation fin 33 and a fourth heat dissipation fin 34, the third heat dissipation fin 33 and the fourth heat dissipation fin 34 are respectively located at opposite sides of the light source module 10, a heat conductor 35 is mounted on an end surface of the light source module 10 far from the imaging module 20, and the third heat dissipation fin 33 and the fourth heat dissipation fin 34 are respectively connected with the heat conductor 35.

Illustratively, as shown in FIG. 14, the thermal conductor 35 is at least one copper tube. For example, the third heat radiation fin 33 and the fourth heat radiation fin 34 may be connected by three copper pipes. The heat conductor 35 is connected to an end surface of the first housing 11 remote from the imaging module 20. The heat generated by the light source 12 can be transferred to the heat conductor connected with the third heat radiating fins 33 and the fourth heat radiating fins 34 through the end surface of the heat conductor 35 connected with the first shell 11, and large-area heat radiation is realized through the third heat radiating fins 33 and the fourth heat radiating fins 34, so that the heat radiation efficiency and the heat radiation capability are improved.

The arrow direction in fig. 1 and 2 may indicate the flow direction of hot air in the external heat dissipation duct. As shown in fig. 1, the projection apparatus further includes a lens module 50, where the lens module 50 is connected to the imaging module 20, the housing assembly 21 includes a main housing 214 and a cover 215, the cover 215 is disposed on a top wall 216 of the main housing 214, the main housing 214 includes a first side wall 214a, and the first side wall 214a is provided with a first heat dissipation fin 32.

As shown in fig. 1, the lens module 50 is illustratively located on one side wall of the main housing 214 remote from the first heat sink fins 32, and the third heat sink fins 33 are located on the same side of the light source module 10 as the lens module 50.

As shown in fig. 1, the projection apparatus further includes a second fan 60, an air outlet of the second fan 60 faces the third heat dissipation fins 33, an air inlet of the second fan 60 faces the imaging module 20, and a portion of heat dissipated by the first heat dissipation fins 32 flows along both sides of the first heat dissipation fins 32, and an outer surface of the cover 215 faces the air inlet of the second fan 60.

The second fan 60 may be an axial flow fan, for example. The axial flow fan can suck air in from the air inlet and then discharge the air from the air outlet in a direction parallel to the axis.

As shown in fig. 1, for example, the first heat dissipating fins 32 may absorb heat in the second accommodating cavity 211 and dissipate the heat outwards, and part of the heat flows along one side of the first heat dissipating fins 32, that is, part of the heat flows along a first air channel corner formed by the first protruding portion 2142 and the first inclined portion 2141 to the outer surface of the cover 215, and the heat dissipating airflow vertically flows along the first air channel corner to the outer surface of the cover 215, flows from the cover 215 to the second heat dissipating fins 36 and then flows towards the air inlet of the second fan 60, so as to form a first external heat dissipating airflow channel, increase the external heat dissipating channel, and improve the heat dissipating efficiency.

As shown in fig. 1, for example, the first heat dissipating fins 32 may absorb heat in the second accommodating cavity 211 and dissipate the heat outwards, and part of the heat flows along the other side of the first heat dissipating fins 32, that is, part of the heat flows along the second air channel corner formed by the second protruding portion 2144 and the second inclined portion 2143 to the outer surface of the cover 215, and the heat dissipating airflow vertically flows along the second air channel corner to the outer surface of the cover 215, flows from the outer surface of the cover 215 to the second heat dissipating fins 36 and then flows towards the air inlet of the second fan 60, so as to form a second external heat dissipating airflow channel, increase the external heat dissipating channel, and improve the heat dissipating efficiency.

In one embodiment, a portion of the heat dissipated by the first heat sink fins 32 flows along the first side wall 214a, the lateral surface of the main housing 214, and a portion of the surface of the first housing 11 toward the air intake of the second fan 60.

As shown in fig. 1, a portion of the heat dissipated by the first heat dissipating fins 32 moves along the first side wall 214a toward the direction approaching the light source 12, that is, a portion of the heat moves laterally from the second air duct corner to a portion of the surface of the first housing 11 in the figure, passes through a portion of the surface of the main housing 214, flows from the lateral surface of the first housing 11 to the second heat dissipating fins 36, flows toward the air inlet of the second fan 60, and forms a third external heat dissipating airflow channel, which increases the external heat dissipating channel and improves the heat dissipating efficiency.

As shown in fig. 2, in one embodiment, the heat dissipation module 30 includes a first heat dissipation module 31, the first heat dissipation module 31 includes a first sub-portion 311 and a second sub-portion 312, the first sub-portion 311 is located in the second accommodating cavity 211, the second sub-portion 312 is located outside the second accommodating cavity 211, the second sub-portion 312 and the second fan 60 are located at the same side of the imaging module 20, and heat emitted by the second sub-portion 312 flows toward an air inlet of the second fan 60.

As shown in fig. 7, the first sub-portion 311 and the second sub-portion 312 are connected by a copper pipe, the heat dissipation air flow of the first fan 40 can absorb heat through the first sub-portion 311 and then circulate internally, the first sub-portion 311 conducts the heat to the second sub-portion 312 by the copper pipe, and the heat dissipated by the second sub-portion 312 flows towards the air inlet of the second fan 60 through the outer wall surface of the housing assembly and the outer wall surface of the first housing, so that a fourth external heat dissipation air flow channel is formed, an external heat dissipation channel is increased, and heat dissipation efficiency is improved.

As shown in fig. 1, in one embodiment, the projection apparatus may further include a lens module 50, where the lens module 50 is connected to the imaging module 20, the housing assembly 21 includes a main housing 214 and a cover 215, the cover 215 is disposed on a top wall 216 of the main housing 214, the main housing 214 includes a first side wall 214a, and the first side wall 214a is provided with a first heat dissipation fin 32 protruding from the first side wall 32.

As shown in fig. 1, the lens module 50 is illustratively located on one side wall of the main housing 214 remote from the first heat dissipation fins 32, and the fourth heat dissipation fins 34 are located on the same side of the light source module 10 as the first heat dissipation fins 32.

As shown in fig. 1, the projection apparatus further includes a third fan 70, an air inlet of the third fan 70 faces the first heat dissipation fins 32, an air outlet of the third fan 70 faces the fourth heat dissipation fins 34, and a portion of heat dissipated by the first heat dissipation fins 32 flows along the first side wall 214a and an outer surface of the cover 215 toward the air inlet of the third fan 70.

The third fan 70 may be an axial flow fan, for example. The axial flow fan can suck air in from the air inlet and then discharge the air from the air outlet in a direction parallel to the axis.

Illustratively, the number of third fans 70 may be plural, as shown in fig. 14, and the number of third fans 70 is two.

As shown in fig. 1, the first heat dissipation fins 32 may absorb heat in the second accommodating cavity 211 and dissipate the heat outwards, and part of the heat moves laterally to a part of the surface of the first housing 11 along the second air channel corner formed by the second protruding portion 2144 and the second inclined portion 2143, flows towards the air inlet of the third fan 70 through the outer surface of the housing assembly, and dissipates the heat through the fourth heat dissipation fins 34, so as to form a fifth external heat dissipation airflow channel, increase the external heat dissipation channel, and improve the heat dissipation efficiency.

The projection apparatus of the embodiment of the present disclosure forms a plurality of outer heat dissipation airflow channels by the first heat dissipation fins 32, the second heat dissipation fins 36, the third heat dissipation fins 33, the fourth heat dissipation fins 34, the cover 215, the second fan 60, the third fan 70, and the like, and forms a plurality of inner circulation heat dissipation channels by the first inner circulation heat dissipation channel and the second inner circulation heat dissipation channel. Therefore, through the combined action of the inner circulation heat dissipation channel and the outer heat dissipation airflow channel, the problems of space limitation and poor heat dissipation capacity of the projection equipment in the related art are solved, the heat dissipation channels are increased, the heat dissipation effect with high efficiency and high space utilization rate is realized, the heat dissipation efficiency is improved, and the power improvement of the light source is facilitated.

Referring to fig. 1, the first housing 11 has a tapered shape gradually increasing from the light source 12 toward the imaging module 20.

Fig. 15 is a schematic structural view of an imaging module according to an embodiment of the present disclosure, and fig. 16 is a schematic structural view of an imaging module according to an embodiment of the present disclosure. As shown in fig. 4 and 5 and 15 and 16, in one embodiment, the projection device may include a first control board 91 and a second control board 92. The first control board 91 may be a display panel control board. As shown in fig. 15, the first control board 91 may be disposed on an outer surface of the cover 215, and the air flow may take away heat of the first control board 91 when flowing along the first external heat dissipation air flow channel, thereby dissipating heat of the first control board 91. The second control board 92 may be disposed at the bottom of the main housing 214, and the second fan 60 may absorb heat of the second control board 92 to radiate heat of the second control board 92.

Other configurations of the projection apparatus of the above embodiments may be applied to various technical solutions now and in the future known to those skilled in the art, and will not be described in detail herein.

In the description of the present specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present disclosure.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

In this disclosure, unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The above disclosure provides many different embodiments or examples for implementing different structures of the disclosure. The components and arrangements of specific examples are described above in order to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present disclosure. Furthermore, the present disclosure may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

The above is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think of various changes or substitutions within the technical scope of the disclosure, which should be covered in the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A projection device, comprising:

the light source module comprises a first shell, wherein a first accommodating cavity is formed in the first shell, and a light source is arranged in the first accommodating cavity;

the imaging module comprises a shell assembly, a second accommodating cavity communicated with the first accommodating cavity is formed in the shell assembly, an image display element is arranged in the second accommodating cavity, a first preset channel is arranged on one side, far away from the light source, of the image display element, a second preset channel is arranged on one side, close to the light source, of the image display element, a first fan is further arranged in the second accommodating cavity, a first air flow circulation channel and a second air flow circulation channel are formed in the second accommodating cavity, and the first air flow circulation channel comprises an air inlet from an air outlet of the first fan to the first preset channel, a first preset channel and an air inlet from an air outlet of the first preset channel to the first fan; the second airflow circulation channel comprises an air inlet from an air outlet of the first fan to the second preset channel, the second preset channel and an air inlet from an air outlet of the second preset channel to the first fan;

2. The projection device of claim 1, wherein a first fresnel lens and a second fresnel lens are respectively disposed on both sides of the image display element, the first fresnel lens and the image display element forming the first preset channel therebetween, and the second fresnel lens and the image display element forming the second preset channel therebetween;

the shell assembly comprises a main shell and a cover body, the cover body is arranged on the top wall of the main shell in a covering mode, a first sub-accommodating cavity is formed in the main shell, the image display element is located in the first sub-accommodating cavity, a first channel is arranged in the top wall, and the first air flow circulating channel further comprises an air inlet from an air outlet of the first preset channel to the first fan through the first channel;

The cover body and form the second between the roof and hold the chamber, first vent and second vent have been seted up to the roof, the second air current circulation passageway still includes from the air outlet of second default passageway passes through the second vent to the second holds the chamber, from the second holds the chamber and passes through first vent to the air intake of first fan.

3. The projection device of claim 2, wherein an insulating transparent body is disposed between the second fresnel lens and the image display element, the second preset channel comprising a first sub-preset channel between the image display element and the insulating transparent body and a second sub-preset channel between the insulating transparent body and the second fresnel lens;

the first ventilation opening comprises a first sub ventilation opening and a second sub ventilation opening, the projection equipment comprises two first fans, the first sub ventilation opening is opposite to an air inlet of a first fan, the second air flow circulation channel further comprises an air outlet of the first sub preset channel, which passes through the second ventilation opening to the second sub containing cavity, and an air inlet of the first fan, which passes through the first sub ventilation opening to the second sub containing cavity;

The second sub-ventilation opening is opposite to the air inlet of the second first fan, and the second air flow circulation channel further comprises an air inlet from the air outlet of the second sub-preset channel to the second sub-containing cavity through the second ventilation opening and an air inlet from the second sub-containing cavity to the second first fan through the second sub-ventilation opening.

4. A projection device as claimed in claim 3, further comprising first adjusting means for adjusting the ventilation of the first sub-vent and/or second adjusting means for adjusting the ventilation of the second sub-vent.

5. The projection device of claim 1, wherein the heat dissipating module comprises a first heat dissipating module comprising a first sub-portion and a second sub-portion, the first sub-portion being positioned within the second receiving cavity, the first sub-portion being positioned between an air outlet of the first fan and an air inlet of the first predetermined channel, the first sub-portion further being positioned between an air outlet of the first fan and an air inlet of the second predetermined channel, the second sub-portion being positioned outside the second receiving cavity.

6. The projection device of claim 1, wherein the housing assembly comprises a main housing and a cover body, the cover body is covered on a top wall of the main housing, a first sub-accommodating cavity is formed in the main housing, a second sub-accommodating cavity is formed between the cover body and the top wall, a second air vent is formed in the top wall, an air outlet of the second preset channel is communicated with the second sub-accommodating cavity through the second air vent, a heat dissipation part is arranged on an outer side surface of the cover body, the heat dissipation part comprises a plurality of heat dissipation fins arranged on an outer surface of the cover body at intervals, the heat dissipation part is close to the second air vent, and the heat dissipation module comprises the cover body and the heat dissipation part.

7. The projection apparatus according to claim 6, wherein a side of the first housing facing the cover is provided with second heat radiation fins close to the heat radiation portion.

8. The projection device of claim 1, wherein the housing assembly includes a main housing and a cover, the cover covering a top wall of the main housing, a first sub-receiving cavity being formed in the main housing, a second sub-receiving cavity being formed between the cover and the top wall, the second receiving cavity including the first sub-receiving cavity and the second sub-receiving cavity;

The first sub-accommodation chamber includes a fan installation chamber for accommodating the first fan and a gas flow chamber located outside the fan installation chamber, the main housing includes a first side wall for forming the gas flow chamber, the first side wall includes a first inclined portion and a first protruding portion protruding outward from the first inclined portion, the first side wall further includes a second inclined portion and a second protruding portion protruding outward from the second inclined portion, the first protruding portion and the second protruding portion are disposed opposite to each other, a first gas flow channel is formed between the first protruding portion and the second protruding portion, a first heat dissipation fin for dissipating heat of gas flowing through the first gas flow channel is disposed between the first protruding portion and the second protruding portion, and the heat dissipation module includes the first heat dissipation fin.

9. The projection device of claim 8, wherein the projection device comprises two first fans, the top wall is provided with a first ventilation opening, the first ventilation opening comprises a first sub ventilation opening and a second sub ventilation opening, air inlets of the first sub ventilation opening and the first fan are respectively positioned at two opposite ends of the first air flow channel, and an air inlet of the second sub ventilation opening is opposite to an air inlet of the second first fan.

10. The projection device of any one of claims 5-9, further comprising a third heat sink fin and a fourth heat sink fin, the third heat sink fin and the fourth heat sink fin being respectively located on opposite sides of the light source module, a heat conductor being mounted on a surface of an end of the light source module remote from the imaging module, the third heat sink fin and the fourth heat sink fin being respectively connected to the heat conductor.

11. The projection device of claim 10, further comprising a lens module coupled to the imaging module, the housing assembly comprising a main housing and a cover, the cover covering a top wall of the main housing, the main housing comprising a first side wall with first heat fins protruding therefrom;

12. The projection device of claim 11, wherein a portion of the heat dissipated by the first heat fins flows along the first sidewall, the lateral surface of the main housing, and a portion of the surface of the first housing toward the air intake of the second fan.

13. The projection device of claim 11, wherein the heat dissipating module comprises a first heat dissipating module comprising a first sub-portion and a second sub-portion, the first sub-portion being positioned within the second receiving cavity and the second sub-portion being positioned outside the second receiving cavity, the second sub-portion being positioned on the same side of the imaging module as the second fan, the heat dissipated by the second sub-portion flowing toward an air intake of the second fan.

14. The projection device of claim 10, further comprising a lens module coupled to the imaging module, the housing assembly comprising a main housing and a cover, the cover covering a top wall of the main housing, the main housing comprising a first side wall with first heat fins protruding therefrom;

the projection equipment further comprises a third fan, an air inlet of the third fan faces the first radiating fins, an air outlet of the third fan faces the fourth radiating fins, and part of heat emitted by the first radiating fins flows along the first side wall and the outer surface of the shell assembly towards the air inlet of the third fan.

15. The projection apparatus according to claim 1, wherein the first housing has a cone shape gradually increasing from the light source toward the imaging module.